diff --git a/nfc/Kconfig b/nfc/Kconfig new file mode 100644 index 0000000000..f87a2b7818 --- /dev/null +++ b/nfc/Kconfig @@ -0,0 +1,29 @@ +# +# near field communication configuration +# + +config NXP_NFC_I2C + tristate "NFC on I2C Interface" + depends on I2C + ---help--- + This selects Near field controller on I2C Interface. + + If you want NFC support, you should say Y here and + also to your specific host controller driver. + +config NXP_NFC_I3C + tristate "NFC on I3C Interface" + depends on I3C + ---help--- + This selects Near field controller on I3C Interface. + + If you want NFC support, you should say Y here and + also to your specific host controller driver. + +config NXP_NFC_SN110 + bool "Nxp NFC sn110 Controller" + ---help--- + You'll have to say Y if your computer contains an sn110 i2C device that + you want to use under Linux. + + You can say N here if you don't have any sn110 I2C connected to your computer. diff --git a/nfc/Makefile b/nfc/Makefile new file mode 100644 index 0000000000..8dc087ee68 --- /dev/null +++ b/nfc/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for nfc devices +# +ifdef CONFIG_NXP_NFC_I2C +obj-y += common.o +else ifdef CONFIG_NXP_NFC_I3C +obj-y += common.o +endif +obj-$(CONFIG_NXP_NFC_I2C) += i2c_drv.o +obj-$(CONFIG_NXP_NFC_I3C) += i3c_drv.o +obj-$(CONFIG_NXP_NFC_SN110) += sn110.o diff --git a/nfc/cold_reset.h b/nfc/cold_reset.h new file mode 100644 index 0000000000..35afe748dc --- /dev/null +++ b/nfc/cold_reset.h @@ -0,0 +1,28 @@ +/****************************************************************************** + * Copyright (C) 2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ + +#ifndef _NFC_COLD_RESET_H_ +#define _NFC_COLD_RESET_H_ + +typedef enum ese_cold_reset_origin { + ESE_COLD_RESET_SOURCE_SPI, + ESE_COLD_RESET_SOURCE_UWB, +} ese_cold_reset_origin_t; + +#endif /* NFC_COLD_RESET_H_ */ diff --git a/nfc/common.c b/nfc/common.c new file mode 100644 index 0000000000..6c3f5c2a80 --- /dev/null +++ b/nfc/common.c @@ -0,0 +1,667 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#include +#include +#include +#include "../nfc/cold_reset.h" +#include "common.h" + +nfc_dev_t *nfc_dev_platform = NULL; + +int nfc_parse_dt(struct device *dev, platform_gpio_t *nfc_gpio, + uint8_t interface) +{ + struct device_node *np = dev->of_node; + + if (!np) { + pr_err("nfc of_node NULL\n"); + return -EINVAL; + } + //required for i2c based chips only + if (interface == PLATFORM_IF_I2C) { + nfc_gpio->irq = of_get_named_gpio(np, DTS_IRQ_GPIO_STR, 0); + if ((!gpio_is_valid(nfc_gpio->irq))) { + pr_err("nfc irq gpio invalid %d\n", nfc_gpio->irq); + return -EINVAL; + } + pr_info("%s: irq %d\n", __func__, nfc_gpio->irq); + } + nfc_gpio->ven = of_get_named_gpio(np, DTS_VEN_GPIO_STR, 0); + if ((!gpio_is_valid(nfc_gpio->ven))) { + pr_err("nfc ven gpio invalid %d\n", nfc_gpio->ven); + return -EINVAL; + } + + nfc_gpio->dwl_req = of_get_named_gpio(np, DTS_FWDN_GPIO_STR, 0); + if ((!gpio_is_valid(nfc_gpio->dwl_req))) { + pr_err("nfc dwl_req gpio invalid %d\n", nfc_gpio->dwl_req); + return -EINVAL; + } + //required for old platform only + nfc_gpio->ese_pwr = of_get_named_gpio(np, DTS_ESE_GPIO_STR, 0); + if ((!gpio_is_valid(nfc_gpio->ese_pwr))) { + pr_err("nfc ese_pwr gpio invalid %d\n", nfc_gpio->ese_pwr); + nfc_gpio->ese_pwr = -EINVAL; + } + + pr_info("%s: %d, %d, %d, %d\n", __func__, + nfc_gpio->irq, nfc_gpio->ven, nfc_gpio->dwl_req, + nfc_gpio->ese_pwr); + return 0; +} + +void gpio_set_ven(nfc_dev_t *nfc_dev, int value) +{ + if (nfc_dev->ven_policy == VEN_ALWAYS_ENABLED) { + value |= 1; + } + if (gpio_get_value(nfc_dev->gpio.ven) != value) { + gpio_set_value(nfc_dev->gpio.ven, value); + /* hardware dependent delay */ + usleep_range(10000, 10100); + } +} + +int configure_gpio(unsigned int gpio, int flag) +{ + int ret; + pr_debug("%s: nfc gpio [%d] flag [%01x]\n", __func__, gpio, flag); + if (gpio_is_valid(gpio)) { + ret = gpio_request(gpio, "nfc_gpio"); + if (ret) { + pr_err("%s: unable to request nfc gpio [%d]\n", + __func__, gpio); + return ret; + } + /*set direction and value for output pin */ + if (flag & GPIO_OUTPUT) + ret = gpio_direction_output(gpio, (GPIO_HIGH & flag)); + else + ret = gpio_direction_input(gpio); + + if (ret) { + pr_err + ("%s: unable to set direction for nfc gpio [%d]\n", + __func__, gpio); + gpio_free(gpio); + return ret; + } + /*Consider value as control for input IRQ pin */ + if (flag & GPIO_IRQ) { + ret = gpio_to_irq(gpio); + if (ret < 0) { + pr_err + ("%s: unable to set irq for nfc gpio [%d]\n", + __func__, gpio); + gpio_free(gpio); + return ret; + } + pr_debug + ("%s: gpio_to_irq successful [%d]\n", + __func__, gpio); + return ret; + } + } else { + pr_err("%s: invalid gpio\n", __func__); + ret = -EINVAL; + } + return ret; +} + +void gpio_free_all(nfc_dev_t *nfc_dev) +{ + if (gpio_is_valid(nfc_dev->gpio.ese_pwr)) { + gpio_free(nfc_dev->gpio.ese_pwr); + } + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_free(nfc_dev->gpio.dwl_req); + } + if (gpio_is_valid(nfc_dev->gpio.irq)) { + gpio_free(nfc_dev->gpio.irq); + } + if (gpio_is_valid(nfc_dev->gpio.ven)) { + gpio_free(nfc_dev->gpio.ven); + } +} + +void nfc_misc_unregister(nfc_dev_t *nfc_dev, int count) +{ + pr_debug("%s: entry\n", __func__); + device_destroy(nfc_dev->nfc_class, nfc_dev->devno); + cdev_del(&nfc_dev->c_dev); + class_destroy(nfc_dev->nfc_class); + unregister_chrdev_region(nfc_dev->devno, count); +} + +int nfc_misc_register(nfc_dev_t *nfc_dev, + const struct file_operations *nfc_fops, + int count, char *devname, char *classname) +{ + int ret = 0; + ret = alloc_chrdev_region(&nfc_dev->devno, 0, count, devname); + if (ret < 0) { + pr_err("%s: failed to alloc chrdev region ret %d\n", + __func__, ret); + return ret; + } + nfc_dev->nfc_class = class_create(THIS_MODULE, classname); + if (IS_ERR(nfc_dev->nfc_class)) { + ret = PTR_ERR(nfc_dev->nfc_class); + pr_err("%s: failed to register device class ret %d\n", + __func__, ret); + unregister_chrdev_region(nfc_dev->devno, count); + return ret; + } + cdev_init(&nfc_dev->c_dev, nfc_fops); + ret = cdev_add(&nfc_dev->c_dev, nfc_dev->devno, count); + if (ret < 0) { + pr_err("%s: failed to add cdev ret %d\n", __func__, ret); + class_destroy(nfc_dev->nfc_class); + unregister_chrdev_region(nfc_dev->devno, count); + return ret; + } + nfc_dev->nfc_device = device_create(nfc_dev->nfc_class, NULL, + nfc_dev->devno, nfc_dev, devname); + if (IS_ERR(nfc_dev->nfc_device)) { + ret = PTR_ERR(nfc_dev->nfc_device); + pr_err("%s: failed to create the device ret %d\n", + __func__, ret); + cdev_del(&nfc_dev->c_dev); + class_destroy(nfc_dev->nfc_class); + unregister_chrdev_region(nfc_dev->devno, count); + return ret; + } + return 0; +} + +static void enable_interrupt(nfc_dev_t *nfc_dev) +{ + if (nfc_dev->interface == PLATFORM_IF_I2C) + i2c_enable_irq(&nfc_dev->i2c_dev); + else { +#ifdef CONFIG_NXP_NFC_I3C + i3c_enable_ibi(&nfc_dev->i3c_dev); +#endif //CONFIG_NXP_NFC_I3C + } +} + +static void disable_interrupt(nfc_dev_t *nfc_dev) +{ + if (nfc_dev->interface == PLATFORM_IF_I2C) + i2c_disable_irq(&nfc_dev->i2c_dev); + else { +#ifdef CONFIG_NXP_NFC_I3C + i3c_disable_ibi(&nfc_dev->i3c_dev); +#endif //CONFIG_NXP_NFC_I3C + } +} + +static int send_cold_reset_cmd(nfc_dev_t *nfc_dev) +{ + int ret = 0; + char cmd[COLD_RESET_CMD_LEN]; + + cmd[0] = COLD_RESET_CMD_GID; + cmd[1] = COLD_RESET_OID; + cmd[2] = COLD_RESET_CMD_PAYLOAD_LEN; + if (nfc_dev->interface == PLATFORM_IF_I2C) { + ret = i2c_write(&nfc_dev->i2c_dev, cmd, + COLD_RESET_CMD_LEN, MAX_RETRY_COUNT); + } else { + //TODO: Handling Cold reset for I3C + //ret = i3c_write(nfc_dev->i3c_dev, cmd, COLD_RESET_CMD_LEN); + } + if (ret != COLD_RESET_CMD_LEN) { + pr_err("%s : i2c_master_send returned %d\n", __func__, ret); + nfc_dev->cold_reset.timer_started = false; + return -EIO; + } + pr_info("%s: NxpNciX: %d > %02X%02X%02X \n", __func__, ret, cmd[0], + cmd[1], cmd[2]); + return ret; +} + +void read_cold_reset_rsp(nfc_dev_t *nfc_dev, char *buf) +{ + int ret = -1; + char rsp[COLD_RESET_RSP_LEN]; + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + cold_reset_t *cold_reset = &nfc_dev->cold_reset; + cold_reset->status = -EIO; + /* + * read header also if NFC is disabled + * for enable case, will be taken care by nfc read thread + */ + if (!cold_reset->nfc_enabled) { + if (nfc_dev->interface == PLATFORM_IF_I2C) { + ret = i2c_read(i2c_dev, rsp, NCI_HDR_LEN); + } else { + //TODO: Handling Cold reset for I3C + //ret = i3c_read(i3c_dev, rsp, NCI_HDR_LEN); + } + if (ret != NCI_HDR_LEN) { + pr_err("%s: failure to read cold reset rsp header\n", + __func__); + return; + } + } else { + memcpy(rsp, buf, NCI_HDR_LEN); + } + if ((NCI_HDR_LEN + rsp[NCI_PAYLOAD_LEN_OFFSET]) != COLD_RESET_RSP_LEN) { + pr_err("%s: - invalid response for cold_reset\n", __func__); + return; + } + if (nfc_dev->interface == PLATFORM_IF_I2C) { + ret = i2c_read(i2c_dev, &rsp[NCI_PAYLOAD_IDX], rsp[2]); + } else { + //TODO:Handling Cold Reset for I3C + //ret = i3c_read(nfc_dev->i3c_dev, &rsp[NCI_PAYLOAD_IDX], rsp[2]); + } + if (ret != rsp[2]) { + pr_err("%s: failure to read cold reset rsp header\n", __func__); + return; + } + pr_info("%s NxpNciR : len = 4 > %02X%02X%02X%02X\n", __func__, rsp[0], + rsp[1], rsp[2], rsp[3]); + cold_reset->status = rsp[NCI_PAYLOAD_IDX]; +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0) +static void ese_cold_reset_gaurd_timer_callback(unsigned long data) +{ + (void)data; +#else +static void ese_cold_reset_gaurd_timer_callback(struct timer_list *unused) +{ +#endif + pr_info("%s: Enter\n",__func__); + nfc_dev_platform->cold_reset.timer_started = false; + return; +} + +static long start_ese_cold_reset_guard_timer(void) +{ + long ret = -EINVAL; + if (timer_pending(&nfc_dev_platform->cold_reset.timer) == 1) { + pr_info("ese_cold_reset_guard_timer: delete pending timer \n"); + /* delete timer if already pending */ + del_timer(&nfc_dev_platform->cold_reset.timer); + } + nfc_dev_platform->cold_reset.timer_started = true; +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0) + init_timer(&nfc_dev_platform->cold_reset.timer); + setup_timer( &nfc_dev_platform->cold_reset.timer, ese_cold_reset_gaurd_timer_callback, 0); +#else + timer_setup(&nfc_dev_platform->cold_reset.timer, ese_cold_reset_gaurd_timer_callback, 0); +#endif + ret = mod_timer(&nfc_dev_platform->cold_reset.timer, + jiffies + msecs_to_jiffies(ESE_COLD_RESET_GUARD_TIME)); + return ret; +} + +static int perform_ese_cold_reset(nfc_dev_t *nfc_dev, + ese_cold_reset_origin_t origin) +{ + int ret = 0; + + if (gpio_get_value(nfc_dev->gpio.dwl_req)) { + pr_err("FW download in-progress\n"); + return -EBUSY; + } + if (!gpio_get_value(nfc_dev->gpio.ven)) { + pr_err("VEN LOW - NFCC powered off\n"); + return -ENODEV; + } + + mutex_lock(&nfc_dev->cold_reset.sync_mutex); + if (!nfc_dev->cold_reset.timer_started) { + ret = start_ese_cold_reset_guard_timer(); + if (ret) { + pr_err("%s: Error in mod_timer\n", __func__); + mutex_unlock(&nfc_dev->cold_reset.sync_mutex); + return ret; + } + /* set default value for status as failure */ + nfc_dev->cold_reset.status = -EIO; + ret = send_cold_reset_cmd(nfc_dev); + if (ret <= 0) { + pr_err("failed to send cold reset command\n"); + mutex_unlock(&nfc_dev->cold_reset.sync_mutex); + return ret; + } + ret = 0; + nfc_dev->cold_reset.rsp_pending = true; + /* check if NFC is enabled */ + if (nfc_dev->cold_reset.nfc_enabled) { + /* Pending read from NFC_HAL will read the cold reset rsp and signal read_wq */ + if (!wait_event_interruptible_timeout + (nfc_dev->cold_reset.read_wq, + nfc_dev->cold_reset.rsp_pending == false, + msecs_to_jiffies(ESE_COLD_RESET_CMD_RSP_TIMEOUT))) + { + pr_err("%s:Cold Reset Response Timeout\n", + __func__); + } + } else { + /* Read data as NFC thread is not active */ + enable_interrupt(nfc_dev); + read_cold_reset_rsp(nfc_dev, NULL); + nfc_dev->cold_reset.rsp_pending = false; + // TODO: Handling Cold reset for I3C + // ret = i3c_read(i3c_dev, rsp, NCI_HDR_LEN); + } + if (!ret) { /* wait for reboot guard timer */ + if (wait_event_interruptible_timeout + (nfc_dev->cold_reset.read_wq, true, + msecs_to_jiffies(ESE_COLD_RESET_REBOOT_GUARD_TIME)) + == 0) { + pr_err("%s: guard Timeout interrupted", + __func__); + } + } + } + mutex_unlock(&nfc_dev->cold_reset.sync_mutex); + if (ret == 0) /* success case */ + ret = nfc_dev->cold_reset.status; + return ret; +} + +/* + * Power management of the eSE + * eSE and NFCC both are powered using VEN gpio, + * VEN HIGH - eSE and NFCC both are powered on + * VEN LOW - eSE and NFCC both are power down + */ +int nfc_ese_pwr(nfc_dev_t *nfc_dev, unsigned long arg) +{ + int ret = 0; + if (arg == ESE_POWER_ON) { + /** + * Let's store the NFC VEN pin state + * will check stored value in case of eSE power off request, + * to find out if NFC MW also sent request to set VEN HIGH + * VEN state will remain HIGH if NFC is enabled otherwise + * it will be set as LOW + */ + nfc_dev->nfc_ven_enabled = gpio_get_value(nfc_dev->gpio.ven); + if (!nfc_dev->nfc_ven_enabled) { + pr_debug("eSE HAL service setting ven HIGH\n"); + gpio_set_ven(nfc_dev, 1); + } else { + pr_debug("ven already HIGH\n"); + } + } else if (arg == ESE_POWER_OFF) { + if (!nfc_dev->nfc_ven_enabled) { + pr_debug("NFC not enabled, disabling ven\n"); + gpio_set_ven(nfc_dev, 0); + } else { + pr_debug("keep ven high as NFC is enabled\n"); + } + } else if (IS_COLD_RESET_REQ(arg) && + nfc_dev->interface == PLATFORM_IF_I2C) { + ret = perform_ese_cold_reset(nfc_dev, arg); + } else if (arg == ESE_POWER_STATE) { + // eSE power state + ret = gpio_get_value(nfc_dev->gpio.ven); + } else { + pr_err("%s bad arg %lu\n", __func__, arg); + ret = -ENOIOCTLCMD; + } + return ret; +} + +EXPORT_SYMBOL(nfc_ese_pwr); + +/* + * This function shall be called from SPI, UWB, NFC driver to perform eSE cold reset. + */ +int ese_cold_reset(ese_cold_reset_origin_t origin) +{ + int ret = 0; + unsigned long arg; + pr_info("%s: Enter origin:%d", __func__, origin); + + switch (origin) { + case ESE_COLD_RESET_SOURCE_SPI: + arg = ESE_COLD_RESET_SPI; + break; + case ESE_COLD_RESET_SOURCE_UWB: + arg = ESE_COLD_RESET_UWB; + break; + default: + pr_info("%s: Invalid argument", __func__); + return -EINVAL; + } + if (nfc_dev_platform == NULL) + return -ENODEV; + ret = nfc_ese_pwr(nfc_dev_platform, arg); + pr_info("%s:%d exit, Status:%d", __func__, origin, ret); + return ret; +} + +EXPORT_SYMBOL(ese_cold_reset); + +/* + * nfc_ioctl_power_states() - power control + * @filp: pointer to the file descriptor + * @arg: mode that we want to move to + * + * Device power control. Depending on the arg value, device moves to + * different states + * (arg = 0): NFC_ENABLE GPIO = 0, FW_DL GPIO = 0 + * (arg = 1): NFC_ENABLE GPIO = 1, FW_DL GPIO = 0 + * (arg = 2): FW_DL GPIO = 1 + * + * Return: -ENOIOCTLCMD if arg is not supported, 0 in any other case + */ +static int nfc_ioctl_power_states(nfc_dev_t *nfc_dev, unsigned long arg) +{ + int ret = 0; + if (arg == NFC_POWER_OFF) { + /* + * We are attempting a hardware reset so let us disable + * interrupts to avoid spurious notifications to upper + * layers. + */ + disable_interrupt(nfc_dev); + pr_debug("gpio firm disable\n"); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 0); + usleep_range(10000, 10100); + } + if (gpio_is_valid(nfc_dev->gpio.ese_pwr)) { + if (!gpio_get_value(nfc_dev->gpio.ese_pwr)) { + pr_debug("disabling ven\n"); + gpio_set_ven(nfc_dev, 0); + } else { + pr_debug("keeping ven high\n"); + } + } else { + pr_debug("ese_pwr invalid, set ven to low\n"); + gpio_set_ven(nfc_dev, 0); + } + nfc_dev->nfc_ven_enabled = false; + } else if (arg == NFC_POWER_ON) { + enable_interrupt(nfc_dev); + pr_debug("gpio_set_value enable: %s:\n", __func__); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 0); + usleep_range(10000, 10100); + } + gpio_set_ven(nfc_dev, 1); + nfc_dev->nfc_ven_enabled = true; +#ifdef CONFIG_NXP_NFC_I3C + if (nfc_dev->interface == PLATFORM_IF_I3C) + nfc_dev->i3c_dev.read_hdr = NCI_HDR_LEN; +#endif //CONFIG_NXP_NFC_I3C + } else if (arg == NFC_FW_DWL_VEN_TOGGLE) { + /* + * We are switching to Dowload Mode, toggle the enable pin + * in order to set the NFCC in the new mode + */ + if (gpio_is_valid(nfc_dev->gpio.ese_pwr)) { + if (gpio_get_value(nfc_dev->gpio.ese_pwr)) { + pr_err + ("FW download forbidden while ese is on\n"); + return -EBUSY; /* Device or resource busy */ + } + } + gpio_set_value(nfc_dev->gpio.ven, 1); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 1); + usleep_range(10000, 10100); + } + if (nfc_dev->interface == PLATFORM_IF_I2C) { + gpio_set_value(nfc_dev->gpio.ven, 0); + usleep_range(10000, 10100); + } + gpio_set_value(nfc_dev->gpio.ven, 1); + usleep_range(10000, 10100); + } else if (arg == NFC_FW_DWL_HIGH) { + /* + * Setting firmware download gpio to HIGH + * before FW download start + */ + pr_debug("set fw gpio high\n"); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 1); + usleep_range(10000, 10100); + } else + pr_debug("gpio.dwl_req is invalid\n"); + } else if (arg == NFC_VEN_FORCED_HARD_RESET + && nfc_dev->interface == PLATFORM_IF_I2C) { + /* + * TODO: Enable Ven reset for I3C, after hot join integration + */ + gpio_set_value(nfc_dev->gpio.ven, 0); + usleep_range(10000, 10100); + gpio_set_value(nfc_dev->gpio.ven, 1); + usleep_range(10000, 10100); + pr_info("%s VEN forced reset done\n", __func__); + } else if (arg == NFC_FW_DWL_LOW) { + /* + * Setting firmware download gpio to LOW + * FW download finished + */ + pr_debug("set fw gpio LOW\n"); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 0); + usleep_range(10000, 10100); + } else { + pr_debug("gpio.dwl_req is invalid\n"); + } +#ifdef CONFIG_NXP_NFC_I3C + if (nfc_dev->interface == PLATFORM_IF_I3C) + nfc_dev->i3c_dev.read_hdr = NCI_HDR_LEN; +#endif //CONFIG_NXP_NFC_I3C +#ifdef CONFIG_NXP_NFC_I3C + } else if (arg == NFC_FW_HDR_LEN) { + if (nfc_dev->interface == PLATFORM_IF_I3C) + nfc_dev->i3c_dev.read_hdr = FW_HDR_LEN; +#endif //CONFIG_NXP_NFC_I3C + } else { + pr_err("%s bad arg %lu\n", __func__, arg); + ret = -ENOIOCTLCMD; + } + return ret; +} + +/** @brief IOCTL function to be used to set or get data from upper layer. + * + * @param pfile fil node for opened device. + * @cmd IOCTL type from upper layer. + * @arg IOCTL arg from upper layer. + * + * @return 0 on success, error code for failures. + */ +long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg) +{ + int ret = 0; + struct nfc_dev *nfc_dev = pfile->private_data; + if (!nfc_dev) + return -ENODEV; + + pr_debug("%s cmd = %x arg = %zx\n", __func__, cmd, arg); + switch (cmd) { + case NFC_SET_PWR: + ret = nfc_ioctl_power_states(nfc_dev, arg); + break; + case ESE_SET_PWR: + ret = nfc_ese_pwr(nfc_dev, arg); + break; + case ESE_GET_PWR: + ret = nfc_ese_pwr(nfc_dev, 3); + break; + case NFC_GET_PLATFORM_TYPE: + ret = nfc_dev->interface; + break; + default: + pr_err("%s bad cmd %lu\n", __func__, arg); + ret = -ENOIOCTLCMD; + }; + return ret; +} + +int nfc_dev_open(struct inode *inode, struct file *filp) +{ + nfc_dev_t *nfc_dev = container_of(inode->i_cdev, nfc_dev_t, c_dev); + if (!nfc_dev) + return -ENODEV; + pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode)); + + mutex_lock(&nfc_dev->dev_ref_mutex); + + filp->private_data = nfc_dev; + + if (nfc_dev->dev_ref_count == 0) { + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 0); + usleep_range(10000, 10100); + } + nfc_dev->cold_reset.nfc_enabled = true; + enable_interrupt(nfc_dev); + } + nfc_dev->dev_ref_count = nfc_dev->dev_ref_count + 1; + mutex_unlock(&nfc_dev->dev_ref_mutex); + return 0; +} + +int nfc_dev_close(struct inode *inode, struct file *filp) +{ + nfc_dev_t *nfc_dev = container_of(inode->i_cdev, nfc_dev_t, c_dev); + if (!nfc_dev) + return -ENODEV; + pr_debug("%s: %d, %d\n", __func__, imajor(inode), iminor(inode)); + mutex_lock(&nfc_dev->dev_ref_mutex); + if (nfc_dev->dev_ref_count == 1) { + disable_interrupt(nfc_dev); + if (gpio_is_valid(nfc_dev->gpio.dwl_req)) { + gpio_set_value(nfc_dev->gpio.dwl_req, 0); + usleep_range(10000, 10100); + } + nfc_dev->cold_reset.nfc_enabled = false; + } + if (nfc_dev->dev_ref_count > 0) + nfc_dev->dev_ref_count = nfc_dev->dev_ref_count - 1; + + filp->private_data = NULL; + + mutex_unlock(&nfc_dev->dev_ref_mutex); + return 0; +} diff --git a/nfc/common.h b/nfc/common.h new file mode 100644 index 0000000000..49f6e2b49b --- /dev/null +++ b/nfc/common.h @@ -0,0 +1,229 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#ifndef _COMMON_H_ +#define _COMMON_H_ +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef CONFIG_NXP_NFC_I2C +#include "i2c_drv.h" +#endif +#ifdef CONFIG_NXP_NFC_I3C +#include "i3c_drv.h" +#endif + +#define DEV_COUNT 1 /* Max device count for this driver */ +#define CLASS_NAME "nfc" /* i2c device class */ + +// NFC character device name, this will be in /dev/ +#define NFC_CHAR_DEV_NAME "pn553" +#define NCI_HDR_LEN 3 /* HDR length of NCI packet */ +#define NCI_PAYLOAD_LEN_OFFSET 2 +#define NCI_PAYLOAD_IDX 3 +#define MAX_NCI_PAYLOAD_LEN (255) +#define MAX_BUFFER_SIZE (NCI_HDR_LEN + MAX_NCI_PAYLOAD_LEN) +#define MAX_RETRY_COUNT (3) +#define NO_RETRY (1) +#define MAX_IRQ_WAIT_TIME (90) +#define WAKEUP_SRC_TIMEOUT (2000) + +/* ESE_COLD_RESET MACROS */ +#define COLD_RESET_CMD_LEN 3 +#define COLD_RESET_RSP_LEN 4 +#define COLD_RESET_CMD_GID 0x2F +#define COLD_RESET_CMD_PAYLOAD_LEN 0x00 +#define COLD_RESET_RSP_GID 0x4F +#define COLD_RESET_OID 0x1E +/* + * ESE_RESET: Bit mask to check if ese_reset_guard timer is started (bit b7) + * */ +#define ESE_COLD_RESET_GUARD_TIMER_MASK (0x80) +/* + * ESE_RESET: Guard time to allow eSE cold reset from the driver + * */ +#define ESE_COLD_RESET_GUARD_TIME (3000) //3s +/* + * ESE_RESET: NCI command response timeout +*/ +#define ESE_COLD_RESET_CMD_RSP_TIMEOUT (2000) //2s +/* + * ESE_RESET: Guard time to reboot the JCOP +*/ +#define ESE_COLD_RESET_REBOOT_GUARD_TIME (50) //50ms +/* + * ESE_RESET: Checks if eSE cold reset has been requested + */ +#define IS_COLD_RESET_REQ(arg) ((arg == ESE_COLD_RESET_NFC) || \ + (arg == ESE_COLD_RESET_SPI) || (arg == ESE_COLD_RESET_UWB)) +/* + * ESE_RESET: macro evaluates to 1 if eSE cold reset response is received + * */ +#define IS_COLD_RESET_RSP(buf) ((COLD_RESET_RSP_GID == buf[0]) && (COLD_RESET_OID == buf[1])) + +#define NFC_MAGIC 0xE9 + +/*Ioctls*/ +// The type should be aligned with MW HAL definitions +#define NFC_SET_PWR _IOW(NFC_MAGIC, 0x01, long) +#define ESE_SET_PWR _IOW(NFC_MAGIC, 0x02, long) +#define ESE_GET_PWR _IOR(NFC_MAGIC, 0x03, long) +#define NFC_GET_PLATFORM_TYPE _IO(NFC_MAGIC, 0x0B) + +#define DTS_IRQ_GPIO_STR "nxp,pn544-irq" +#define DTS_VEN_GPIO_STR "nxp,pn544-ven" +#define DTS_FWDN_GPIO_STR "nxp,pn544-fw-dwnld" +#define DTS_ESE_GPIO_STR "nxp,pn544-ese-pwr" + +enum ese_ioctl_request { + /* eSE POWER ON */ + ESE_POWER_ON = 0, + /* eSE POWER OFF */ + ESE_POWER_OFF, + /* eSE POWER STATE */ + ESE_POWER_STATE, + /* eSE COLD RESET */ + ESE_COLD_RESET_NFC, + ESE_COLD_RESET_SPI, + ESE_COLD_RESET_UWB, +}; + +enum nfcc_ioctl_request { + /* NFC disable request with VEN LOW */ + NFC_POWER_OFF = 0, + /* NFC enable request with VEN Toggle */ + NFC_POWER_ON, + /* firmware download request with VEN Toggle */ + NFC_FW_DWL_VEN_TOGGLE, + /* ISO reset request */ + NFC_ISO_RESET, + /* request for firmware download gpio HIGH */ + NFC_FW_DWL_HIGH, + /* VEN hard reset request */ + NFC_VEN_FORCED_HARD_RESET, + /* request for firmware download gpio LOW */ + NFC_FW_DWL_LOW, + /*for HDR size change in FW mode */ + NFC_FW_HDR_LEN, + /* Cold reset request for eSE */ + NFC_ESE_COLD_RST, +}; + +/*nfc platform interface type*/ +enum interface_flags { + /*I2C physical IF for NFCC */ + PLATFORM_IF_I2C = 0, + /*I3C physical IF for NFCC */ + PLATFORM_IF_I3C, +}; +/*nfc platform interface type*/ +enum ven_policy_flags { + /*VEN usage in lagacy platform */ + VEN_LEGACY = 0, + /*VEN reset only to recover from failure usecases */ + VEN_ALWAYS_ENABLED, +}; +/* Power state for IBI handing, mainly needed to defer the IBI handling + for the IBI received in suspend state to do it later in resume call*/ +enum pm_state_flags { + PM_STATE_NORMAL = 0, + PM_STATE_SUSPEND, + PM_STATE_IBI_BEFORE_RESUME, +}; + +/* Enum for GPIO values*/ +enum gpio_values { + GPIO_INPUT = 0x0, + GPIO_OUTPUT = 0x1, + GPIO_HIGH = 0x2, + GPIO_OUTPUT_HIGH = 0x3, + GPIO_IRQ = 0x4, +}; + +// NFC GPIO variables +typedef struct platform_gpio { + unsigned int irq; + unsigned int ven; + unsigned int dwl_req; + unsigned int ese_pwr; +} platform_gpio_t; + +//Features specific Parameters +typedef struct cold_reset { + wait_queue_head_t read_wq; + bool rsp_pending; + unsigned int ntf; + uint8_t status; + /* NFC device opened by MW */ + bool nfc_enabled; + /* eSe cold reset guard timer is started */ + bool timer_started; + struct mutex sync_mutex; + struct timer_list timer; +} cold_reset_t; + +/* Device specific structure */ +typedef struct nfc_dev { + wait_queue_head_t read_wq; + struct mutex read_mutex; + struct mutex ese_access_mutex; + struct mutex dev_ref_mutex; + unsigned int dev_ref_count; + struct class *nfc_class; + struct device *nfc_device; + struct cdev c_dev; + dev_t devno; + /* Interface flag */ + uint8_t interface; + + /*store the ven functioning */ + uint8_t ven_policy; + /* NFC VEN pin state */ + bool nfc_ven_enabled; + union { +#ifdef CONFIG_NXP_NFC_I2C + i2c_dev_t i2c_dev; +#endif +#ifdef CONFIG_NXP_NFC_I3C + i3c_dev_t i3c_dev; +#endif + }; + platform_gpio_t gpio; + cold_reset_t cold_reset; +} nfc_dev_t; + +int nfc_dev_open(struct inode *inode, struct file *filp); +int nfc_dev_close(struct inode *inode, struct file *filp); +long nfc_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg); +int nfc_parse_dt(struct device *dev, platform_gpio_t *nfc_gpio, + uint8_t interface); +int nfc_misc_register(nfc_dev_t *nfc_dev, + const struct file_operations *nfc_fops, + int count, char *devname, char *classname); +void nfc_misc_unregister(nfc_dev_t *nfc_dev, int count); +int configure_gpio(unsigned int gpio, int flag); +void read_cold_reset_rsp(nfc_dev_t *nfc_dev, char *buf); +void gpio_set_ven(nfc_dev_t *nfc_dev, int value); +void gpio_free_all(nfc_dev_t *nfc_dev); +#endif //_COMMON_H_ diff --git a/nfc/i2c_drv.c b/nfc/i2c_drv.c new file mode 100644 index 0000000000..5d1e1393c5 --- /dev/null +++ b/nfc/i2c_drv.c @@ -0,0 +1,465 @@ +/****************************************************************************** + * Copyright (C) 2013-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +/* + * Copyright (C) 2010 Trusted Logic S.A. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include "../nfc/cold_reset.h" +#include "common.h" +#include "sn110.h" + +extern nfc_dev_t *nfc_dev_platform; + +/** + * i2c_disable_irq() + * + * Check if interrupt is disabled or not + * and disable interrupt + * + * Return: void + */ +void i2c_disable_irq(i2c_dev_t *i2c_dev) +{ + unsigned long flags; + + spin_lock_irqsave(&i2c_dev->irq_enabled_lock, flags); + if (i2c_dev->irq_enabled) { + disable_irq_nosync(i2c_dev->client->irq); + i2c_dev->irq_enabled = false; + } + spin_unlock_irqrestore(&i2c_dev->irq_enabled_lock, flags); +} + +/** + * i2c_enable_irq() + * + * Check if interrupt is enabled or not + * and enable interrupt + * + * Return: void + */ +void i2c_enable_irq(i2c_dev_t *i2c_dev) +{ + unsigned long flags; + + spin_lock_irqsave(&i2c_dev->irq_enabled_lock, flags); + if (!i2c_dev->irq_enabled) { + i2c_dev->irq_enabled = true; + enable_irq(i2c_dev->client->irq); + } + spin_unlock_irqrestore(&i2c_dev->irq_enabled_lock, flags); +} + +static irqreturn_t i2c_irq_handler(int irq, void *dev_id) +{ + nfc_dev_t *nfc_dev = dev_id; + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + if (device_may_wakeup(&i2c_dev->client->dev)) + pm_wakeup_event(&i2c_dev->client->dev, WAKEUP_SRC_TIMEOUT); + + i2c_disable_irq(i2c_dev); + wake_up(&nfc_dev->read_wq); + + return IRQ_HANDLED; +} + +int i2c_read(i2c_dev_t *i2c_dev, char *buf, size_t count) +{ + int ret; + pr_debug("%s : reading %zu bytes.\n", __func__, count); + /* Read data */ + ret = i2c_master_recv(i2c_dev->client, buf, count); + if (ret <= 0) { + pr_err("%s: i2c_master_recv returned %d\n", __func__, ret); + goto err; + } + if (ret > count) { + pr_err("%s: received too many bytes from i2c (%d)\n", + __func__, ret); + ret = -EIO; + } + /* delay for the slow nfc devices between susequent read operation */ + usleep_range(1000, 1100); +err: + return ret; +} + +int i2c_write(i2c_dev_t *i2c_dev, char *buf, size_t count, int max_retry_cnt) +{ + int ret = -EINVAL; + int retry_cnt; + + pr_debug("%s : writing %zu bytes.\n", __func__, count); + + for (retry_cnt = 1; retry_cnt <= max_retry_cnt; retry_cnt++) { + ret = i2c_master_send(i2c_dev->client, buf, count); + if (ret <= 0) { + pr_warn + ("%s: write failed, Maybe in Standby Mode - Retry(%d)\n", + __func__, retry_cnt); + usleep_range(1000, 1100); + } else if (ret == count) + break; + } + return ret; +} + +ssize_t nfc_i2c_dev_read(struct file *filp, char __user *buf, + size_t count, loff_t *offset) +{ + int ret; + char tmp[MAX_BUFFER_SIZE]; + nfc_dev_t *nfc_dev = filp->private_data; + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + + if (count > MAX_BUFFER_SIZE) + count = MAX_BUFFER_SIZE; + + pr_debug("%s : reading %zu bytes.\n", __func__, count); + mutex_lock(&nfc_dev->read_mutex); + if (!gpio_get_value(nfc_dev->gpio.irq)) { + if (filp->f_flags & O_NONBLOCK) { + pr_err(":f_falg has O_NONBLOCK. EAGAIN\n"); + ret = -EAGAIN; + goto err; + } + while (1) { + ret = 0; + if (!i2c_dev->irq_enabled) { + i2c_dev->irq_enabled = true; + enable_irq(i2c_dev->client->irq); + } + ret = wait_event_interruptible(nfc_dev->read_wq, + !i2c_dev->irq_enabled); + if (ret) { + pr_err("error wakeup of read wq\n"); + goto err; + } + + i2c_disable_irq(i2c_dev); + if (!gpio_get_value(nfc_dev->gpio.ven)) { + pr_info("%s: releasing read\n", __func__); + ret = -EIO; + goto err; + } + if (gpio_get_value(nfc_dev->gpio.irq)) + break; + pr_warn("%s: spurious interrupt detected\n", __func__); + } + } + + memset(tmp, 0x00, count); + /* Read data */ + ret = i2c_read(i2c_dev, tmp, count); + if (ret <= 0) { + pr_err("%s: i2c_read returned %d\n", __func__, ret); + goto err; + } + /* check if it's response of cold reset command + * NFC HAL process shouldn't receive this data as + * command was sent by driver + */ + if (nfc_dev->cold_reset.rsp_pending && IS_COLD_RESET_RSP(tmp)) { + read_cold_reset_rsp(nfc_dev, tmp); + nfc_dev->cold_reset.rsp_pending = false; + wake_up_interruptible(&nfc_dev->cold_reset.read_wq); + mutex_unlock(&nfc_dev->read_mutex); + /* + * NFC process doesn't know about cold reset command + * being sent as it was initiated by eSE process + * we shouldn't return any data to NFC process + */ + return 0; + } + if (copy_to_user(buf, tmp, ret)) { + pr_warn("%s : failed to copy to user space\n", __func__); + ret = -EFAULT; + } + +err: + mutex_unlock(&nfc_dev->read_mutex); + return ret; +} + +ssize_t nfc_i2c_dev_write(struct file *filp, const char __user *buf, + size_t count, loff_t *offset) +{ + int ret; + char tmp[MAX_BUFFER_SIZE]; + nfc_dev_t *nfc_dev = filp->private_data; + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + + if (count > MAX_BUFFER_SIZE) + count = MAX_BUFFER_SIZE; + + if (copy_from_user(tmp, buf, count)) { + pr_err("%s : failed to copy from user space\n", __func__); + return -EFAULT; + } + ret = i2c_write(i2c_dev, tmp, count, NO_RETRY); + if (ret != count) { + pr_err("%s: failed to write %d\n", __func__, ret); + ret = -EIO; + } + + return ret; +} + +static const struct file_operations nfc_i2c_dev_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = nfc_i2c_dev_read, + .write = nfc_i2c_dev_write, + .open = nfc_dev_open, + .release = nfc_dev_close, + .unlocked_ioctl = nfc_dev_ioctl, +}; + +int nfc_i2c_dev_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + int ret = 0; + nfc_dev_t *nfc_dev = NULL; + i2c_dev_t *i2c_dev = NULL; + platform_gpio_t nfc_gpio; + pr_debug("%s: enter\n", __func__); + /*retrive details of gpios from dt */ + ret = nfc_parse_dt(&client->dev, &nfc_gpio, PLATFORM_IF_I2C); + if (ret) { + pr_err("%s : failed to parse dt\n", __func__); + goto err; + } + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + pr_err("%s : need I2C_FUNC_I2C\n", __func__); + ret = -ENODEV; + goto err; + } + nfc_dev = kzalloc(sizeof(nfc_dev_t), GFP_KERNEL); + if (nfc_dev == NULL) { + ret = -ENOMEM; + goto err; + } + nfc_dev_platform = nfc_dev; + nfc_dev->interface = PLATFORM_IF_I2C; + nfc_dev->i2c_dev.client = client; + i2c_dev = &nfc_dev->i2c_dev; + + ret = configure_gpio(nfc_gpio.ven, GPIO_OUTPUT); + if (ret) { + pr_err("%s: unable to request nfc reset gpio [%d]\n", + __func__, nfc_gpio.ven); + goto err; + } + ret = configure_gpio(nfc_gpio.irq, GPIO_IRQ); + if (ret <= 0) { + pr_err("%s: unable to request nfc irq gpio [%d]\n", + __func__, nfc_gpio.irq); + goto err; + } + client->irq = ret; + ret = configure_gpio(nfc_gpio.dwl_req, GPIO_OUTPUT); + if (ret) { + pr_err("%s: unable to request nfc firm downl gpio [%d]\n", + __func__, nfc_gpio.dwl_req); + goto err; + } + ret = configure_gpio(nfc_gpio.ese_pwr, GPIO_OUTPUT); + if (ret) { + pr_err("%s: unable to request nfc ese pwr gpio [%d]\n", + __func__, nfc_gpio.ese_pwr); + } + nfc_dev->gpio.ven = nfc_gpio.ven; + nfc_dev->gpio.irq = nfc_gpio.irq; + nfc_dev->gpio.dwl_req = nfc_gpio.dwl_req; + nfc_dev->gpio.ese_pwr = nfc_gpio.ese_pwr; + + /* init mutex and queues */ + init_waitqueue_head(&nfc_dev->read_wq); + init_waitqueue_head(&nfc_dev->cold_reset.read_wq); + mutex_init(&nfc_dev->read_mutex); + mutex_init(&nfc_dev->dev_ref_mutex); + mutex_init(&nfc_dev->ese_access_mutex); + mutex_init(&nfc_dev->cold_reset.sync_mutex); + spin_lock_init(&i2c_dev->irq_enabled_lock); + + ret = nfc_misc_register(nfc_dev, &nfc_i2c_dev_fops, DEV_COUNT, + NFC_CHAR_DEV_NAME, CLASS_NAME); + if (ret) { + pr_err("%s: nfc_misc_register failed\n", __func__); + goto err_mutex_destroy; + } + /* interrupt initializations */ + pr_info("%s : requesting IRQ %d\n", __func__, client->irq); + i2c_dev->irq_enabled = true; + ret = request_irq(client->irq, i2c_irq_handler, + IRQF_TRIGGER_HIGH, client->name, nfc_dev); + if (ret) { + pr_err("%s: request_irq failed\n", __func__); + goto err_nfc_misc_unregister; + } + i2c_disable_irq(i2c_dev); + device_init_wakeup(&client->dev, true); + device_set_wakeup_capable(&client->dev, true); + i2c_set_clientdata(client, nfc_dev); + i2c_dev->irq_wake_up = false; + nfc_dev->cold_reset.rsp_pending = false; + nfc_dev->cold_reset.nfc_enabled = false; + + /*call to platform specific probe */ + ret = sn110_i2c_probe(nfc_dev); + if (ret != 0) { + pr_err("%s: probing platform failed\n", __func__); + goto err_request_free_irq; + }; + pr_info("%s probing nfc i2c successfully", __func__); + return 0; +err_request_free_irq: + free_irq(client->irq, nfc_dev); +err_nfc_misc_unregister: + nfc_misc_unregister(nfc_dev, DEV_COUNT); +err_mutex_destroy: + mutex_destroy(&nfc_dev->dev_ref_mutex); + mutex_destroy(&nfc_dev->read_mutex); + mutex_destroy(&nfc_dev->ese_access_mutex); + mutex_destroy(&nfc_dev->cold_reset.sync_mutex); +err: + gpio_free_all(nfc_dev); + if (nfc_dev) + kfree(nfc_dev); + pr_err("%s: probing not successful, check hardware\n", __func__); + return ret; +} + +int nfc_i2c_dev_remove(struct i2c_client *client) +{ + int ret = 0; + nfc_dev_t *nfc_dev = NULL; + pr_info("%s: remove device\n", __func__); + nfc_dev = i2c_get_clientdata(client); + if (!nfc_dev) { + pr_err("%s: device doesn't exist anymore\n", __func__); + ret = -ENODEV; + return ret; + } + free_irq(client->irq, nfc_dev); + nfc_misc_unregister(nfc_dev, DEV_COUNT); + mutex_destroy(&nfc_dev->read_mutex); + mutex_destroy(&nfc_dev->ese_access_mutex); + mutex_destroy(&nfc_dev->cold_reset.sync_mutex); + gpio_free_all(nfc_dev); + if (nfc_dev) + kfree(nfc_dev); + return ret; +} + +int nfc_i2c_dev_suspend(struct device *device) +{ + struct i2c_client *client = to_i2c_client(device); + nfc_dev_t *nfc_dev = i2c_get_clientdata(client); + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + + if (device_may_wakeup(&client->dev) && i2c_dev->irq_enabled) { + if (!enable_irq_wake(client->irq)) + i2c_dev->irq_wake_up = true; + } + return 0; +} + +int nfc_i2c_dev_resume(struct device *device) +{ + struct i2c_client *client = to_i2c_client(device); + nfc_dev_t *nfc_dev = i2c_get_clientdata(client); + i2c_dev_t *i2c_dev = &nfc_dev->i2c_dev; + + if (device_may_wakeup(&client->dev) && i2c_dev->irq_wake_up) { + if (!disable_irq_wake(client->irq)) + i2c_dev->irq_wake_up = false; + } + return 0; +} + +static const struct i2c_device_id nfc_i2c_dev_id[] = { + {NFC_I2C_DEV_ID, 0}, + {} +}; + +static const struct of_device_id nfc_i2c_dev_match_table[] = { + {.compatible = NFC_I2C_DRV_STR,}, + {} +}; + +static const struct dev_pm_ops nfc_i2c_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(nfc_i2c_dev_suspend, nfc_i2c_dev_resume) +}; + +static struct i2c_driver nfc_i2c_dev_driver = { + .id_table = nfc_i2c_dev_id, + .probe = nfc_i2c_dev_probe, + .remove = nfc_i2c_dev_remove, + .driver = { + .name = NFC_I2C_DRV_STR, + .pm = &nfc_i2c_dev_pm_ops, + .of_match_table = nfc_i2c_dev_match_table, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; + +MODULE_DEVICE_TABLE(of, nfc_i2c_dev_match_table); + +static int __init nfc_i2c_dev_init(void) +{ + int ret = 0; + pr_info("Loading NXP NFC I2C driver\n"); + ret = i2c_add_driver(&nfc_i2c_dev_driver); + return ret; +} + +module_init(nfc_i2c_dev_init); + +static void __exit nfc_i2c_dev_exit(void) +{ + pr_info("Unloading NXP NFC I2C driver\n"); + i2c_del_driver(&nfc_i2c_dev_driver); +} + +module_exit(nfc_i2c_dev_exit); + +MODULE_DESCRIPTION("NXP NFC I2C driver"); +MODULE_LICENSE("GPL"); diff --git a/nfc/i2c_drv.h b/nfc/i2c_drv.h new file mode 100644 index 0000000000..eef57dc8d3 --- /dev/null +++ b/nfc/i2c_drv.h @@ -0,0 +1,47 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#ifndef _I2C_DRV_H_ +#define _I2C_DRV_H_ +#include + +/*kept same as dts */ +#define NFC_I2C_DRV_STR "nxp,pn544" +#define NFC_I2C_DEV_ID "pn553" + +//Interface specific parameters +typedef struct i2c_dev { + struct i2c_client *client; + /*IRQ parameters */ + bool irq_enabled; + spinlock_t irq_enabled_lock; + /* NFC_IRQ wake-up state */ + bool irq_wake_up; +} i2c_dev_t; + +long nfc_i2c_dev_ioctl(struct file *pfile, unsigned int cmd, unsigned long arg); +int nfc_i2c_dev_probe(struct i2c_client *client, + const struct i2c_device_id *id); +int nfc_i2c_dev_remove(struct i2c_client *client); +int nfc_i2c_dev_suspend(struct device *device); +int nfc_i2c_dev_resume(struct device *device); +void i2c_disable_irq(i2c_dev_t *i2c_dev); +void i2c_enable_irq(i2c_dev_t *i2c_dev); +int i2c_write(i2c_dev_t *i2c_dev, char *buf, size_t count, int max_retry_cnt); +int i2c_read(i2c_dev_t *i2c_dev, char *buf, size_t count); +#endif //_I2C_DRV_H_ diff --git a/nfc/i3c_drv.c b/nfc/i3c_drv.c new file mode 100644 index 0000000000..063308c268 --- /dev/null +++ b/nfc/i3c_drv.c @@ -0,0 +1,766 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#include +#include +#include +#include +#include +#include +#include +#include +#include "common.h" +#include "sn110.h" + +/** @brief This API used to write I3C data to I3C device. + * + * @param dev the i3c_dev for the i3c device. + * @param buf the data to write + * @param count the number of bytes of data to be written. + * @return ret number of bytes written ,negative error core otherwise. + */ +ssize_t i3c_write(i3c_dev_t *i3c_dev, const char *buf, const size_t count, + int max_retry_cnt) +{ + int ret = -EIO; + int retry_count = 0; + struct i3c_priv_xfer write_buf = { + .rnw = NFC_I3C_WRITE, + .len = count, + .data.out = buf + }; + do { + ret = i3c_device_do_priv_xfers(i3c_dev->device, &write_buf, + (sizeof(write_buf) / + sizeof(struct i3c_priv_xfer))); + + pr_debug("%s exit ret = %x\n", __func__, ret); + if (!ret) { + ret = count; + break; + } + pr_err("%s errno = %x\n", __func__, write_buf.err); + retry_count++; + + usleep_range(1000, 1100); + } while (retry_count < max_retry_cnt); + return ret; +} + +/** @brief This API used to read data from I3C device. + * + * @param dev the i3c_dev for the slave. + * @param buf the buffer to copy the data. + * @param count the number of bytes to be read. + * + * @return number of bytes read ,negative error code otherwise. + */ +ssize_t i3c_read(i3c_dev_t *i3c_dev, char *buf, size_t count) +{ + int ret = -EIO; + struct i3c_priv_xfer read_buf = { + .rnw = NFC_I3C_READ, + .len = count, + .data.in = buf + }; + + ret = i3c_device_do_priv_xfers(i3c_dev->device, &read_buf, + (sizeof(read_buf) / + sizeof(struct i3c_priv_xfer))); + pr_debug("%s exit ret = %x\n", __func__, ret); + if (!ret) + ret = count; + else + pr_err("%s errno = %x\n", __func__, read_buf.err); + + return ret; +} + +/** @brief This API can be used to write data to nci buf. + * The API will overwrite the existing memory if + * it reaches the end of total allocated memory. + * @param dev the dev structure for driver. + * @param readbuf the buffer to be copied data from + * @param count the number of bytes to copy to nci_buffer. + * @return number of bytes copied to nci buffer , error code otherwise + */ +static ssize_t i3c_kbuf_store(i3c_dev_t *i3c_dev, const char *buf, + const size_t count) +{ + size_t buf_offset = 0; + size_t requested_size = count; + size_t available_size = 0; + + if (i3c_dev == NULL) + return -ENODEV; + else if (buf == NULL || count == 0) + return -EINVAL; + + pr_debug("%s enter\n", __func__); + if (count > i3c_dev->buf.total_size) { + pr_err("%s No memory to copy the data\n", __func__); + return -ENOMEM; + } + + pr_debug("%s:total_size %zx write_off = %x read_off = %x\n", + __func__, i3c_dev->buf.total_size, i3c_dev->buf.write_offset, + i3c_dev->buf.read_offset); + + mutex_lock(&i3c_dev->nci_buf_mutex); + + available_size = i3c_dev->buf.total_size - i3c_dev->buf.write_offset; + + /* + * When available buffer is less than requested count, + * copy the data upto available memory. + * The remaining data is copied to the start of memory. + * The write offset is incremented by the remaining copied bytes + * from the beginning. + */ + + if (requested_size > available_size) { + pr_warn + ("%s:out of mem req_size = %zx avail = %zx\n", + __func__, requested_size, available_size); + memcpy(i3c_dev->buf.kbuf + i3c_dev->buf.write_offset, + buf + buf_offset, available_size); + requested_size = requested_size - available_size; + i3c_dev->buf.write_offset = 0; + buf_offset = available_size; + pr_debug("%s: requested_size = %zx available_size = %zx\n", + __func__, requested_size, available_size); + } + if (requested_size) { + memcpy(i3c_dev->buf.kbuf + i3c_dev->buf.write_offset, + buf + buf_offset, requested_size); + i3c_dev->buf.write_offset += requested_size; + if (i3c_dev->buf.write_offset == i3c_dev->buf.total_size) + i3c_dev->buf.write_offset = 0; + } + complete(&i3c_dev->read_cplt); + mutex_unlock(&i3c_dev->nci_buf_mutex); + pr_debug("%s: total bytes req_size = %zx avail_size = %zx\n", + __func__, requested_size, available_size); + + return count; +} + +/** @brief This API can be used to retrieve data from driver buffer. + * + * When data is not available, it waits for required data to be present. + * When data is present it copies the data into buffer reuested by read. + * @param dev the dev structure for driver. + * @param buf the buffer to copy the data. + * @param count the number of bytes to be read. + * @return number of bytes copied , error code for failures . + */ +static ssize_t i3c_nci_kbuf_retrieve(i3c_dev_t *i3c_dev, char *buf, + size_t count) +{ + int ret = 0; + size_t requested_size = count; + size_t available_size = 0; + size_t copied_size = 0; + if (i3c_dev == NULL) + return -ENODEV; + else if (buf == NULL || count == 0) + return -EINVAL; + pr_debug("%s enter\n", __func__); + + /* + * When the requested data count is more than available data to read, + * wait on completion till the requested bytes are available. + * If write offset is more than read offset and available data is + * more than requested count, copy the requested bytes directly and + * increment the read_offset. + * If read offset is more than write offset, + * available size is total_size size - read_offset + * and upto write offset from the beginning of buffer. + */ + + do { + + pr_debug("%s: read_offset = %x write_offset = %x\n", __func__, + i3c_dev->buf.read_offset, i3c_dev->buf.write_offset); + + mutex_lock(&i3c_dev->nci_buf_mutex); + if (i3c_dev->buf.read_offset <= i3c_dev->buf.write_offset) + available_size = + i3c_dev->buf.write_offset - + i3c_dev->buf.read_offset; + else + available_size = + (i3c_dev->buf.total_size - + i3c_dev->buf.read_offset) + + i3c_dev->buf.write_offset; + mutex_unlock(&i3c_dev->nci_buf_mutex); + if (available_size >= requested_size) + break; + + reinit_completion(&i3c_dev->read_cplt); + ret = wait_for_completion_interruptible(&i3c_dev->read_cplt); + if (ret != 0) { + pr_err("didnt get completion, interrupted!! ret %d\n", + ret); + return -EINVAL; + } + } while (available_size < requested_size); + + mutex_lock(&i3c_dev->nci_buf_mutex); + + if (i3c_dev->buf.write_offset >= i3c_dev->buf.read_offset + + requested_size) { + /* + * Write offset is more than read offset + count , copy the data + * directly and increment the read offset + */ + memcpy(buf, i3c_dev->buf.kbuf + i3c_dev->buf.read_offset, + requested_size); + i3c_dev->buf.read_offset += requested_size; + } else { + copied_size = + i3c_dev->buf.total_size - i3c_dev->buf.read_offset; + if (copied_size > requested_size) + copied_size = requested_size; + /* + * Read offset is more than write offset. Copy requested data + * from read_offset to the total size and increment the read + * offset. If requested data is still greater than zero, + * copy the data from beginning of buffer. + */ + memcpy(buf, i3c_dev->buf.kbuf + i3c_dev->buf.read_offset, + copied_size); + requested_size = requested_size - copied_size; + i3c_dev->buf.read_offset += copied_size; + if (requested_size) { + pr_debug("%s remaining copied bytes\n", __func__); + memcpy(buf + copied_size, i3c_dev->buf.kbuf, + requested_size); + i3c_dev->buf.read_offset = requested_size; + } + } + mutex_unlock(&i3c_dev->nci_buf_mutex); + pr_debug("%s , count = %zx exit\n", __func__, count); + return count; +} + +/** @brief This API can be used to read data from I3C device from HAL layer. + * + * This read function is registered during probe. + * When data is not available, it waits for required data to be present. + * @param filp the device file handle opened by HAL. + * @param buf the buffer to read the data. + * @param count the number of bytes to be read. + * @param offset the offset in the buf. + * @return Number of bytes read from I3C device ,error code for failures. + */ +ssize_t nfc_i3c_dev_read(struct file *filp, char __user *buf, + size_t count, loff_t *offset) +{ + int ret; + char tmp[MAX_BUFFER_SIZE]; + nfc_dev_t *nfc_dev = filp->private_data; + i3c_dev_t *i3c_dev = &nfc_dev->i3c_dev; + if (count > MAX_BUFFER_SIZE) + count = MAX_BUFFER_SIZE; + memset(tmp, 0x00, count); + pr_debug("%s : reading %zu bytes\n", __func__, count); + + mutex_lock(&nfc_dev->read_mutex); + ret = i3c_nci_kbuf_retrieve(i3c_dev, tmp, count); + if (ret != count) { + pr_err("%s: buf read from I3C device returned error (%d)\n", + __func__, ret); + ret = -EIO; + } else if (copy_to_user(buf, tmp, ret)) { + pr_warn("%s : failed to copy to user space\n", __func__); + ret = -EFAULT; + } + + mutex_unlock(&nfc_dev->read_mutex); + + return ret; +} + +/** @brief This API can be used to write data to I3C device. + * + * @param dev the i3c_dev for the slave. + * @param buf the buffer to copy the data. + * @param count the number of bytes to be read. + * @return ret count number of btes written, error code for failures. + */ +ssize_t nfc_i3c_dev_write(struct file *filp, const char __user *buf, + size_t count, loff_t *offset) +{ + int ret; + char tmp[MAX_BUFFER_SIZE]; + nfc_dev_t *nfc_dev = filp->private_data; + i3c_dev_t *i3c_dev = &nfc_dev->i3c_dev; + if (count > MAX_BUFFER_SIZE) { + pr_err("%s: requested writes size(%d) more then expected\n", + __func__, count); + return -ENOMEM; + } + + if (copy_from_user(tmp, buf, count)) { + pr_err("%s : failed to copy from user space\n", __func__); + ret = PTR_ERR(tmp); + return ret; + } + + ret = i3c_write(i3c_dev, tmp, count, NO_RETRY); + if (ret != count) { + pr_err("%s: failed to write %d\n", __func__, ret); + ret = -EIO; + } + pr_debug("%s : i3c-%d: NfcNciTx %x %x %x\n", __func__, + iminor(file_inode(filp)), tmp[0], tmp[1], tmp[2]); + pr_debug("%s : ret = %x\n", __func__, ret); + return ret; +} + +/** @brief This API shall be called from workqueue queue from IBI handler. + * First it will read HDR byte from I3C chip.Based on the length byte + * it will read the next length bytes.Then it will write these bytes + * to nci write buf. + * @param work the work added into the workqueue. + * + * @return void + */ +static void i3c_workqueue_handler(struct work_struct *work) +{ + int ret = 0; + int length_byte = 0; + unsigned char *tmp = NULL; + unsigned char hdr_len = NCI_HDR_LEN; + i3c_dev_t *i3c_dev = container_of(work, i3c_dev_t, work); + + if (!i3c_dev) { + pr_err("%s: dev not found\n", __func__); + return; + } + hdr_len = i3c_dev->read_hdr; + tmp = i3c_dev->read_kbuf; + if (!tmp) { + pr_err("%s: No memory to copy read data\n", __func__); + return; + } + pr_info("%s: hdr_len = %d\n", __func__, hdr_len); + memset(tmp, 0x00, i3c_dev->read_kbuf_len); + + ret = i3c_read(i3c_dev, tmp, hdr_len); + if (ret < 0) { + pr_err("%s: i3c_read returned error %d\n", __func__, ret); + return; + } + if (hdr_len == FW_HDR_LEN) + length_byte = tmp[hdr_len - 1] + FW_CRC_LEN; + else + length_byte = tmp[hdr_len - 1]; + ret = i3c_read(i3c_dev, tmp + hdr_len, length_byte); + if (ret < 0) { + pr_err("%s: i3c_read returned error %d\n", __func__, ret); + i3c_kbuf_store(i3c_dev, tmp, hdr_len); + return; + } + i3c_kbuf_store(i3c_dev, tmp, hdr_len + length_byte); +} + +/** @brief This API is used to handle IBI coming from the I3C device. + * This will add work into the workqueue , which will call workqueue + * handler to read data from I3C device. + * @param device I3C device. + * @param payload payload shall be NULL for NFC device. + * @return void. + */ +static void i3c_ibi_handler(struct i3c_device *device, + const struct i3c_ibi_payload *payload) +{ + nfc_dev_t *nfc_dev = i3cdev_get_drvdata(device); + i3c_dev_t *i3c_dev = &nfc_dev->i3c_dev; + pr_debug("%s: Received read IBI request from slave", __func__); + if (device_may_wakeup(&device->dev)) + pm_wakeup_event(&device->dev, WAKEUP_SRC_TIMEOUT); + + if (atomic_read(&i3c_dev->pm_state) == PM_STATE_NORMAL) { + if (!queue_work(i3c_dev->wq, &i3c_dev->work)) + pr_debug("%s: queue work success\n", __func__); + } else { + /*assume suspend state and expect only 1 IBI in suspend state */ + atomic_set(&i3c_dev->pm_state, PM_STATE_IBI_BEFORE_RESUME); + } +} + +/** @brief This API can be used to enable IBI from the I3C device. + * @param i3c_dev the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +int i3c_enable_ibi(i3c_dev_t *i3c_dev) +{ + int ret = 0; + int retry_count = 0; + + if (!i3c_dev->ibi_enabled) { + do { + ret = i3c_device_enable_ibi(i3c_dev->device); + if (!ret) { + i3c_dev->ibi_enabled = true; + break; + } + + pr_debug("en_ibi ret %d retrying..\n", ret); + retry_count++; + usleep_range(RETRY_WAIT_TIME_USEC, + (RETRY_WAIT_TIME_USEC + 100)); + } while (retry_count < RETRY_COUNT_IBI); + } else { + pr_debug("%s: already enabled\n", __func__); + } + return ret; +} + +/** @brief This API can be used to disable IBI from the I3C device. + * @param i3c_dev the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +int i3c_disable_ibi(i3c_dev_t *i3c_dev) +{ + int ret = 0; + int retry_count = 0; + + if (i3c_dev->ibi_enabled) { + do { + ret = i3c_device_disable_ibi(i3c_dev->device); + if (!ret) { + i3c_dev->ibi_enabled = false; + break; + } + pr_debug("dis_ibi ret %d retrying..\n", ret); + retry_count++; + usleep_range(RETRY_WAIT_TIME_USEC, + (RETRY_WAIT_TIME_USEC + 100)); + } while (retry_count < RETRY_COUNT_IBI); + } else { + pr_debug("%s: already disabled\n", __func__); + } + return ret; +} + +/** @brief This API can be used to request IBI from the I3C device. + * This function will request IBI from master controller for the device + * and register ibi handler, enable IBI . + * @param i3c_dev the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +static int i3c_request_ibi(i3c_dev_t *i3c_dev) +{ + int ret = 0; + struct i3c_ibi_setup ibireq = { + .handler = i3c_ibi_handler, + .max_payload_len = MAX_IBI_PAYLOAD_LEN, + .num_slots = NUM_NFC_IBI_SLOT, + }; + ret = i3c_device_request_ibi(i3c_dev->device, &ibireq); + pr_debug("%s Request IBI status = %d\n", __func__, ret); + return ret; +} + +/** @brief This API can be used to create a workqueue for + * handling IBI request from I3C device. + * + * @param dev the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +static int i3c_init_workqueue(i3c_dev_t *i3c_dev) +{ + i3c_dev->wq = alloc_workqueue(I3C_WORKQUEUE_NAME, 0, 0); + if (!i3c_dev->wq) + return -ENOMEM; + + INIT_WORK(&i3c_dev->work, i3c_workqueue_handler); + pr_debug("%s ibi workqueue created successfully\n", __func__); + return 0; +} + +/** @brief This API can be used to set the NCI buf to zero. + * + * @param dev the dev for the driver. + * @return 0 on success, error code for failures. + */ +static int i3c_reset_nci_buf(i3c_dev_t *i3c_dev) +{ + i3c_dev->buf.write_offset = 0; + i3c_dev->buf.read_offset = 0; + memset(i3c_dev->buf.kbuf, 0, i3c_dev->buf.total_size); + return 0; +} + +static const struct file_operations nfc_i3c_dev_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = nfc_i3c_dev_read, + .write = nfc_i3c_dev_write, + .open = nfc_dev_open, + .release = nfc_dev_close, + .unlocked_ioctl = nfc_dev_ioctl, +}; + +/** @brief This API can be used to probe I3c device. + * + * @param device the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +int nfc_i3c_dev_probe(struct i3c_device *device) +{ + int ret = 0; + nfc_dev_t *nfc_dev = NULL; + platform_gpio_t nfc_gpio; + pr_debug("%s: enter\n", __func__); + /*retrive details of gpios from dt */ + ret = nfc_parse_dt(&device->dev, &nfc_gpio, PLATFORM_IF_I3C); + if (ret) { + pr_err("%s : failed to parse dt\n", __func__); + goto err; + } + nfc_dev = kzalloc(sizeof(nfc_dev_t), GFP_KERNEL); + if (nfc_dev == NULL) { + ret = -ENOMEM; + goto err; + } + + /* + * Memory allocation for the read from the I3C before + * storing it in Kbuf store + */ + nfc_dev->i3c_dev.read_hdr = NCI_HDR_LEN; + nfc_dev->i3c_dev.read_kbuf_len = MAX_BUFFER_SIZE; + nfc_dev->i3c_dev.read_kbuf = kzalloc(MAX_BUFFER_SIZE, + GFP_DMA | GFP_KERNEL); + if (!nfc_dev->i3c_dev.read_kbuf) { + ret = -ENOMEM; + goto err; + } + + /* + * Kbuf memory for storing NCI/Firmware Mode Buffers before + * actual read from the user + */ + nfc_dev->i3c_dev.buf.kbuf = (char *)__get_free_pages(GFP_KERNEL, 0); + if (!nfc_dev->i3c_dev.buf.kbuf) { + ret = -ENOMEM; + goto err; + } + nfc_dev->i3c_dev.buf.total_size = PAGE_SIZE; + i3c_reset_nci_buf(&nfc_dev->i3c_dev); + nfc_dev->interface = PLATFORM_IF_I3C; + nfc_dev->i3c_dev.device = device; + + ret = configure_gpio(nfc_gpio.ven, GPIO_OUTPUT_HIGH); + if (ret) { + pr_err("%s: unable to request nfc reset gpio [%d]\n", + __func__, nfc_gpio.ven); + goto err; + } + ret = configure_gpio(nfc_gpio.dwl_req, GPIO_OUTPUT); + if (ret) { + pr_err("%s: unable to request nfc firm downl gpio [%d]\n", + __func__, nfc_gpio.dwl_req); + goto err; + } + + nfc_dev->gpio.ven = nfc_gpio.ven; + nfc_dev->gpio.irq = nfc_gpio.irq; + nfc_dev->gpio.dwl_req = -EINVAL; + nfc_dev->gpio.ese_pwr = -EINVAL; + + /* init mutex and queues */ + init_completion(&nfc_dev->i3c_dev.read_cplt); + mutex_init(&nfc_dev->i3c_dev.nci_buf_mutex); + mutex_init(&nfc_dev->dev_ref_mutex); + mutex_init(&nfc_dev->read_mutex); + ret = i3c_init_workqueue(&nfc_dev->i3c_dev); + if (ret) { + pr_err("%s: alloc workqueue failed\n", __func__); + goto err_mutex_destroy; + } + ret = nfc_misc_register(nfc_dev, &nfc_i3c_dev_fops, DEV_COUNT, + NFC_CHAR_DEV_NAME, CLASS_NAME); + if (ret) { + pr_err("%s: nfc_misc_register failed\n", __func__); + goto err_mutex_destroy; + } + i3cdev_set_drvdata(device, nfc_dev); + + ret = i3c_request_ibi(&nfc_dev->i3c_dev); + if (ret) { + pr_err("%s: i3c_request_ibi failed\n", __func__); + goto err_nfc_misc_unregister; + } + atomic_set(&nfc_dev->i3c_dev.pm_state, PM_STATE_NORMAL); + + device_init_wakeup(&device->dev, true); + device_set_wakeup_capable(&device->dev, true); + /*call to platform specific probe */ + ret = sn110_i3c_probe(nfc_dev); + if (ret != 0) { + pr_err("%s: probing platform failed\n", __func__); + goto err_nfc_misc_unregister; + }; + pr_info("%s probing nfc i3c successfully", __func__); + return 0; +err_nfc_misc_unregister: + nfc_misc_unregister(nfc_dev, DEV_COUNT); +err_mutex_destroy: + mutex_destroy(&nfc_dev->read_mutex); + mutex_destroy(&nfc_dev->dev_ref_mutex); + mutex_destroy(&nfc_dev->i3c_dev.nci_buf_mutex); +err: + gpio_free_all(nfc_dev); + if (nfc_dev->i3c_dev.buf.kbuf) + free_pages((unsigned long)nfc_dev->i3c_dev.buf.kbuf, 0); + if (nfc_dev->i3c_dev.read_kbuf) + kfree(nfc_dev->i3c_dev.read_kbuf); + if (nfc_dev) + kfree(nfc_dev); + pr_err("%s: probing not successful, check hardware\n", __func__); + return ret; +} + +/** @brief This API is automatically called on shutdown or crash. + * + * @param device the i3c_dev for the slave. + * @return 0 on success, error code for failures. + */ +int nfc_i3c_dev_remove(struct i3c_device *device) +{ + nfc_dev_t *nfc_dev = i3cdev_get_drvdata(device); + i3c_dev_t *i3c_dev = NULL; + if (!nfc_dev) { + pr_err("%s: device doesn't exist anymore\n", __func__); + return -ENODEV; + } + i3c_dev = &nfc_dev->i3c_dev; + i3c_device_disable_ibi(device); + i3c_device_free_ibi(device); + if (i3c_dev->wq) + destroy_workqueue(i3c_dev->wq); + nfc_misc_unregister(nfc_dev, DEV_COUNT); + mutex_destroy(&nfc_dev->read_mutex); + mutex_destroy(&nfc_dev->dev_ref_mutex); + mutex_destroy(&i3c_dev->nci_buf_mutex); + gpio_free_all(nfc_dev); + kfree(i3c_dev->read_kbuf); + free_pages((unsigned long)i3c_dev->buf.kbuf, 0); + kfree(nfc_dev); + return 0; +} + +int nfc_i3c_dev_suspend(struct device *pdev) +{ + struct i3c_device *device = dev_to_i3cdev(pdev); + nfc_dev_t *nfc_dev = i3cdev_get_drvdata(device); + pr_debug("%s: enter\n", __func__); + if (!nfc_dev) { + pr_err("%s: device doesn't exist anymore\n", __func__); + return -ENODEV; + } + + if (device_may_wakeup(&device->dev) && nfc_dev->i3c_dev.ibi_enabled) + atomic_set(&nfc_dev->i3c_dev.pm_state, PM_STATE_SUSPEND); + + return 0; +} + +int nfc_i3c_dev_resume(struct device *pdev) +{ + struct i3c_device *device = dev_to_i3cdev(pdev); + nfc_dev_t *nfc_dev = i3cdev_get_drvdata(device); + i3c_dev_t *i3c_dev = NULL; + pr_debug("%s: enter\n", __func__); + if (!nfc_dev) { + pr_err("%s: device doesn't exist anymore\n", __func__); + return -ENODEV; + } + i3c_dev = &nfc_dev->i3c_dev; + if (device_may_wakeup(&device->dev)) { + + if (atomic_read(&i3c_dev->pm_state) == + PM_STATE_IBI_BEFORE_RESUME) { + /*queue the deferered work to work queue */ + if (!queue_work(i3c_dev->wq, &i3c_dev->work)) + pr_debug("%s: Added workqueue successfully\n", + __func__); + } + atomic_set(&i3c_dev->pm_state, PM_STATE_NORMAL); + } + + return 0; +} + +static const struct i3c_device_id nfc_i3c_dev_id[] = { + I3C_DEVICE(NFC_I3C_MANU_ID, NFC_I3C_PART_ID, 0), + {}, +}; + +static const struct of_device_id nfc_i3c_dev_match_table[] = { + { + .compatible = NFC_I3C_DRV_STR + }, + {} +}; + +static const struct dev_pm_ops nfc_i3c_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(nfc_i3c_dev_suspend, nfc_i3c_dev_resume) +}; + +static struct i3c_driver nfc_i3c_dev_driver = { + .id_table = nfc_i3c_dev_id, + .probe = nfc_i3c_dev_probe, + .remove = nfc_i3c_dev_remove, + .driver = { + .owner = THIS_MODULE, + .name = NFC_I3C_DRV_STR, + .pm = &nfc_i3c_dev_pm_ops, + .of_match_table = nfc_i3c_dev_match_table, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; + +MODULE_DEVICE_TABLE(of, nfc_i3c_dev_match_table); + +static int __init nfc_dev_i3c_init(void) +{ + int ret = 0; + pr_info("Loading NXP NFC I3C driver\n"); + ret = i3c_driver_register_with_owner(&nfc_i3c_dev_driver, THIS_MODULE); + pr_debug("NFC i3c driver register ret = %d\n", ret); + return ret; +} + +module_init(nfc_dev_i3c_init); + +static void __exit nfc_i3c_dev_exit(void) +{ + pr_info("Unloading NXP NFC I3C driver\n"); + i3c_driver_unregister(&nfc_i3c_dev_driver); +} + +module_exit(nfc_i3c_dev_exit); + +MODULE_DESCRIPTION("NXP NFC I3C driver"); +MODULE_LICENSE("GPL"); diff --git a/nfc/i3c_drv.h b/nfc/i3c_drv.h new file mode 100644 index 0000000000..5ed2e77ca5 --- /dev/null +++ b/nfc/i3c_drv.h @@ -0,0 +1,109 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#ifndef _I3C_DRV_H_ +#define _I3C_DRV_H_ + +#include +#include + +//to to kept same as dt +#define NFC_I3C_DRV_STR "nxp,pn544_i3c" +#define NFC_I3C_MANU_ID (0x011B) +#define NFC_I3C_PART_ID (0) + +//Byte indicating I3C Read +#define NFC_I3C_READ 1 + +//Byte indicating I3C Write +#define NFC_I3C_WRITE 0 + +// Maximum no of IBI slot +#define NUM_NFC_IBI_SLOT 1 + +// Maximum IBI payload length +#define MAX_IBI_PAYLOAD_LEN 0 + +// CRC len to be read +#define FW_CRC_LEN 2 + +// FW DNLD HDR length +#define FW_HDR_LEN 2 + +// Time to wait before retrying I3C writes, in micro seconds +#define RETRY_WAIT_TIME_USEC (2000) + +// Retry count for enable/disable IBI CCC +#define RETRY_COUNT_IBI (3) + +// I3C WorkQueue name +#define I3C_WORKQUEUE_NAME "i3c_workq" +/** + * struct nci_buf - NCI buffer used to store and retrieve read data from device. + * @read_offset: The offset pointing to data available to read in nci buf. + * @write_offset: The offset pointing to free buf available to write. + * @total_size: Size of nci buf. + * @kbuf: allocated nci buf. + */ +struct nci_buf { + unsigned int read_offset; + unsigned int write_offset; + size_t total_size; + char *kbuf; +}; + +/** + * struct i3c_dev Structure representing device and driver data. + * @i3c_device Structure to represent I3C device. + * @wq: NCI workqueue for handling IBI request. + * @work: Work added to workqueue to read data from IBI handler. + * @buf Driver buf store read data from device.Read call will + * fetch from this buffer. + * @nci_buf_mutex: mutex to protect NCI buf retrieve/store . + * @read_cplt: Completion to wait for read data to be available. + * @read_kbuf_len: Temp buf len to hold I3C data. + * @read_kbuf: Temp buf to hold I3C data. + * @read_hdr Header size for reads. + * @ibi_enabled: IBI enabled or not. + * @pm_state: PM state of NFC I3C device. + */ +typedef struct i3c_dev { + struct i3c_device *device; + struct workqueue_struct *wq; + struct work_struct work; + struct nci_buf buf; + struct mutex nci_buf_mutex; + struct completion read_cplt; + size_t read_kbuf_len; + char *read_kbuf; + unsigned char read_hdr; + bool ibi_enabled; + atomic_t pm_state; + +} i3c_dev_t; + +int nfc_i3c_dev_probe(struct i3c_device *device); +int nfc_i3c_dev_remove(struct i3c_device *device); +int nfc_i3c_dev_suspend(struct device *device); +int nfc_i3c_dev_resume(struct device *device); +int i3c_enable_ibi(i3c_dev_t *i3c_dev); +int i3c_disable_ibi(i3c_dev_t *i3c_dev); +ssize_t i3c_write(i3c_dev_t *i3c_dev, const char *buf, const size_t count, + int max_retry_cnt); +ssize_t i3c_read(i3c_dev_t *, char *buf, size_t count); +#endif //_I3C_DRV_H_ diff --git a/nfc/sn110.c b/nfc/sn110.c new file mode 100644 index 0000000000..605ccf12a8 --- /dev/null +++ b/nfc/sn110.c @@ -0,0 +1,38 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#include +#include "common.h" +#include "sn110.h" + +int sn110_i2c_probe(nfc_dev_t *nfc_dev) +{ + pr_debug("%s: enter\n", __func__); + usleep_range(5000, 5100); + gpio_set_value(nfc_dev->gpio.ven, 1); + usleep_range(5000, 5100); + nfc_dev->ven_policy = VEN_ALWAYS_ENABLED; + return 0; +} + +int sn110_i3c_probe(nfc_dev_t *nfc_dev) +{ + pr_debug("%s: enter\n", __func__); + nfc_dev->ven_policy = VEN_ALWAYS_ENABLED; + return 0; +} diff --git a/nfc/sn110.h b/nfc/sn110.h new file mode 100644 index 0000000000..93de1bebfb --- /dev/null +++ b/nfc/sn110.h @@ -0,0 +1,23 @@ +/****************************************************************************** + * Copyright (C) 2019-2020 NXP + * * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ******************************************************************************/ +#ifndef _NFC_SN110_H_ +#define _NFC_SN110_H_ +int sn110_i2c_probe(nfc_dev_t *nfc_dev); +int sn110_i3c_probe(nfc_dev_t *nfc_dev); +#endif //_NFC_SN110_H_ diff --git a/pn553-i2c/Kconfig b/pn553-i2c/Kconfig deleted file mode 100644 index 878e4a8169..0000000000 --- a/pn553-i2c/Kconfig +++ /dev/null @@ -1,13 +0,0 @@ -# -# Nxp Nci protocol (I2C) devices -# - -config NFC_PN553_DEVICES - bool "Nxp pn553 NCI protocol driver (I2C) devices" - default y - ---help--- - You'll have to say Y if your computer contains an I2C device that - you want to use under Linux. - - You can say N here if you don't have any SPI connected to your computer. - diff --git a/pn553-i2c/Makefile b/pn553-i2c/Makefile deleted file mode 100644 index 0534eed532..0000000000 --- a/pn553-i2c/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# -# Makefile for nfc devices -# - -obj-$(CONFIG_NFC_PN553_DEVICES) += pn553.o - -ccflags-$(CONFIG_NFC_PN553_DEVICES) := -DDEBUG - diff --git a/pn553-i2c/pn553.c b/pn553-i2c/pn553.c deleted file mode 100644 index 7fc6958103..0000000000 --- a/pn553-i2c/pn553.c +++ /dev/null @@ -1,1734 +0,0 @@ -/* - * Copyright (C) 2010 Trusted Logic S.A. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - */ -/****************************************************************************** - * - * The original Work has been changed by NXP Semiconductors. - * - * Copyright (C) 2013-2019 NXP Semiconductors - * * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - ******************************************************************************/ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -/* HiKey Compilation fix */ -#define HiKey_620_COMPILATION_FIX 1 -#ifndef HiKey_620_COMPILATION_FIX -#include -#endif - -#include -#include "pn553.h" - -#define NEXUS5x 0 -#define HWINFO 0 -#if NEXUS5x -#undef ISO_RST -#else -#define ISO_RST -#endif -#define DRAGON_NFC 1 -#define SIG_NFC 44 -#define MAX_BUFFER_SIZE 512 -#define MAX_SECURE_SESSIONS 1 -#define MSG_PROP_GID 0x4F -#define ESE_CLD_RST_OID 0x1E -#define ESE_CLD_RST_RSP_SIZE 0x04 - -/* VEN is kept ON all the time if you define the macro VEN_ALWAYS_ON. -Used for SN100 usecases */ -#define VEN_ALWAYS_ON -/* Macro added to disable SVDD power toggling */ -/* #define JCOP_4X_VALIDATION */ - -struct pn544_dev { - wait_queue_head_t read_wq; - struct mutex read_mutex; - struct i2c_client *client; - struct miscdevice pn544_device; - unsigned int ven_gpio; - unsigned int firm_gpio; - unsigned int irq_gpio; - unsigned int ese_pwr_gpio; /* gpio used by SPI to provide power to p61 via NFCC */ -#ifdef ISO_RST - unsigned int iso_rst_gpio; /* ISO-RST pin gpio*/ -#endif - struct mutex p61_state_mutex; /* used to make p61_current_state flag secure */ - p61_access_state_t p61_current_state; /* stores the current P61 state */ - bool nfc_ven_enabled; /* stores the VEN pin state powered by Nfc */ - bool spi_ven_enabled; /* stores the VEN pin state powered by Spi */ - bool irq_enabled; - spinlock_t irq_enabled_lock; - long nfc_service_pid; /*used to signal the nfc the nfc service */ - chip_pwr_scheme_t chip_pwr_scheme; - unsigned int secure_timer_cnt; - struct workqueue_struct *pSecureTimerCbWq; - struct work_struct wq_task; - /* Bit value Status Remark - * b0 : 1 -> NFC_ON Driver Open should set the flag - * 0 NFC_OFF Driver release should reset this flag - * b1 : 1 -> FWDNLD If FWDNLD is going on. - * 0 Normal operation - * b2 : 1 -> ese_cold_reset sequence has been triggered from the SPI driver - * 0 -> ese_cold_reset cmd has been written by the NFC HAL - * bits b3 to b7 : Reserved for the future use. - * NOTE: Driver probe function should reset b0-b2 flags. - * The value of b3-b7 flags is undetermined. - * */ - volatile uint8_t state_flags; -}; -/* HiKey Compilation fix */ -#ifndef HiKey_620_COMPILATION_FIX -struct wake_lock nfc_wake_lock; -#if HWINFO -struct hw_type_info hw_info; -#endif -static bool sIsWakeLocked = false; -#endif -static struct pn544_dev *pn544_dev; -static struct semaphore ese_access_sema; -static struct semaphore svdd_sync_onoff_sema; -static struct completion dwp_onoff_sema; -static struct completion ese_cold_reset_sema; -static int8_t ese_cold_reset_rsp[ESE_CLD_RST_RSP_SIZE]; -static struct timer_list secure_timer; -static void release_ese_lock(p61_access_state_t p61_current_state); -int get_ese_lock(p61_access_state_t p61_current_state, int timeout); -static long set_jcop_download_state(unsigned long arg); -static long start_seccure_timer(unsigned long timer_value); -static long secure_timer_operation(struct pn544_dev *pn544_dev, unsigned long arg); -#if HWINFO -static void check_hw_info(void); -#endif -#define SECURE_TIMER_WORK_QUEUE "SecTimerCbWq" - -static void pn544_disable_irq(struct pn544_dev *pn544_dev) -{ - unsigned long flags; - - spin_lock_irqsave(&pn544_dev->irq_enabled_lock, flags); - if (pn544_dev->irq_enabled) { - disable_irq_nosync(pn544_dev->client->irq); - disable_irq_wake(pn544_dev->client->irq); - pn544_dev->irq_enabled = false; - } - spin_unlock_irqrestore(&pn544_dev->irq_enabled_lock, flags); -} - -static int pn544_dev_release(struct inode *inode, struct file *filp) { - pn544_dev->state_flags = 0x00; - if (pn544_dev->firm_gpio) - gpio_set_value(pn544_dev->firm_gpio, 0); - pr_info(KERN_ALERT "Exit %s: NFC driver release nfc hal \n", __func__); - return 0; -} -static irqreturn_t pn544_dev_irq_handler(int irq, void *dev_id) -{ - struct pn544_dev *pn544_dev = dev_id; - - pn544_disable_irq(pn544_dev); - /* HiKey Compilation fix */ - #ifndef HiKey_620_COMPILATION_FIX - if (sIsWakeLocked == false) - { - wake_lock(&nfc_wake_lock); - sIsWakeLocked = true; - } else { - pr_debug("%s already wake locked!\n", __func__); - } - #endif - /* Wake up waiting readers */ - wake_up(&pn544_dev->read_wq); - - - return IRQ_HANDLED; -} - -static void rcv_ese_cldrst_status(void) -{ - int ret = -1; - char tmp[MAX_BUFFER_SIZE]; - size_t rcount = (size_t)ese_cold_reset_rsp[2]; - /* Read data: No need to wait for the interrupt */ - ret = i2c_master_recv(pn544_dev->client, tmp, rcount); - if(ret == rcount){ - ese_cold_reset_rsp[3] = tmp[0]; - pr_info("%s NxpNciR : len = 4 > %02X%02X%02X%02X\n", __func__,ese_cold_reset_rsp[0], - ese_cold_reset_rsp[1],ese_cold_reset_rsp[2],ese_cold_reset_rsp[3]); - }else{ - pr_err("%s : Failed to receive payload of the cold_rst_cmd\n",__func__); - ese_cold_reset_rsp[3] = -EIO; - } - if(pn544_dev->state_flags &(P544_FLAG_NFC_ON)){ - complete(&ese_cold_reset_sema); - } -} - -static ssize_t pn544_dev_read(struct file *filp, char __user *buf, - size_t count, loff_t *offset) -{ - struct pn544_dev *pn544_dev = filp->private_data; - char tmp[MAX_BUFFER_SIZE]; - int ret; - - if (count > MAX_BUFFER_SIZE) - count = MAX_BUFFER_SIZE; - - //pr_debug("%s : reading %zu bytes.\n", __func__, count); - - mutex_lock(&pn544_dev->read_mutex); - - if (!gpio_get_value(pn544_dev->irq_gpio)) { - if (filp->f_flags & O_NONBLOCK) { - ret = -EAGAIN; - goto fail; - } - - while (1) { - pn544_dev->irq_enabled = true; - enable_irq(pn544_dev->client->irq); - enable_irq_wake(pn544_dev->client->irq); - ret = wait_event_interruptible( - pn544_dev->read_wq, - !pn544_dev->irq_enabled); - - pn544_disable_irq(pn544_dev); - - if (ret) - goto fail; - if(pn544_dev->state_flags & P544_FLAG_NFC_VEN_RESET) { - pr_warning("%s: releasing read \n", __func__); - pn544_dev->state_flags &= ~P544_FLAG_NFC_VEN_RESET; - ret = -EL3RST; - goto fail; - } - if (gpio_get_value(pn544_dev->irq_gpio)) - break; - - pr_warning("%s: spurious interrupt detected\n", __func__); - } - } - - /* Read data */ - ret = i2c_master_recv(pn544_dev->client, tmp, count); - #ifndef HiKey_620_COMPILATION_FIX - /* HiKey Compilation fix */ - if (sIsWakeLocked == true) { - wake_unlock(&nfc_wake_lock); - sIsWakeLocked = false; - } - #endif - - /* if the received response for COLD_RESET_COMMAND - * Consume it in driver*/ - if((pn544_dev->state_flags & P544_FLAG_ESE_COLD_RESET_FROM_DRIVER) && - MSG_PROP_GID == tmp[0] && ESE_CLD_RST_OID == tmp[1]){ - memset(&ese_cold_reset_rsp, 0, sizeof(ese_cold_reset_rsp)); - memcpy(ese_cold_reset_rsp, tmp, 3); - rcv_ese_cldrst_status(); - mutex_unlock(&pn544_dev->read_mutex); - return 0; - } - mutex_unlock(&pn544_dev->read_mutex); - - /* pn544 seems to be slow in handling I2C read requests - * so add 1ms delay after recv operation */ -#if !NEXUS5x - udelay(1000); -#endif - - if (ret < 0) { - pr_err("%s: i2c_master_recv returned %d\n", __func__, ret); - return ret; - } - if (ret > count) { - pr_err("%s: received too many bytes from i2c (%d)\n", - __func__, ret); - return -EIO; - } - if (copy_to_user(buf, tmp, ret)) { - pr_warning("%s : failed to copy to user space\n", __func__); - return -EFAULT; - } - return ret; - - fail: - mutex_unlock(&pn544_dev->read_mutex); - return ret; -} - -static ssize_t pn544_dev_write(struct file *filp, const char __user *buf, - size_t count, loff_t *offset) -{ - struct pn544_dev *pn544_dev; - char tmp[MAX_BUFFER_SIZE]; - int ret; - - pn544_dev = filp->private_data; - - if (count > MAX_BUFFER_SIZE) - count = MAX_BUFFER_SIZE; - - if (copy_from_user(tmp, buf, count)) { - pr_err("%s : failed to copy from user space\n", __func__); - return -EFAULT; - } - - //pr_debug("%s : writing %zu bytes.\n", __func__, count); - /* Write data */ - ret = i2c_master_send(pn544_dev->client, tmp, count); - if (ret != count) { - pr_err("%s : i2c_master_send returned %d\n", __func__, ret); - ret = -EIO; - } - /* pn544 seems to be slow in handling I2C write requests - * so add 1ms delay after I2C send oparation */ - udelay(1000); - - return ret; -} - -static void p61_update_access_state(struct pn544_dev *pn544_dev, p61_access_state_t current_state, bool set) -{ - pr_info("%s: Enter current_state = %x\n", __func__, pn544_dev->p61_current_state); - if (current_state) - { - if(set){ - if(pn544_dev->p61_current_state == P61_STATE_IDLE) - pn544_dev->p61_current_state = P61_STATE_INVALID; - pn544_dev->p61_current_state |= current_state; - } - else{ - pn544_dev->p61_current_state ^= current_state; - if(!pn544_dev->p61_current_state) - pn544_dev->p61_current_state = P61_STATE_IDLE; - } - } - pr_info("%s: Exit current_state = %x\n", __func__, pn544_dev->p61_current_state); -} - -static void p61_get_access_state(struct pn544_dev *pn544_dev, p61_access_state_t *current_state) -{ - - if (current_state == NULL) { - //*current_state = P61_STATE_INVALID; - pr_err("%s : invalid state of p61_access_state_t current state \n", __func__); - } else { - *current_state = pn544_dev->p61_current_state; - } -} -static void p61_access_lock(struct pn544_dev *pn544_dev) -{ - mutex_lock(&pn544_dev->p61_state_mutex); -} -static void p61_access_unlock(struct pn544_dev *pn544_dev) -{ - mutex_unlock(&pn544_dev->p61_state_mutex); -} - -long p61_cold_reset(void) -{ - long ret = 0; - unsigned int loop=0x03; - struct file filp; - int timeout = 2000; /* 2s timeout :NCI cmd timeout*/ - unsigned long tempJ = msecs_to_jiffies(timeout); - uint8_t cmd_ese_cold_reset[] = {0x2F, 0x1E, 0x00}; - filp.private_data = pn544_dev; - pr_info("%s: Enter", __func__); - - if(pn544_dev->state_flags & P544_FLAG_FW_DNLD){ - /* If FW DNLD, Operation is not permitted */ - pr_err("%s : Operation is not permitted during fwdnld\n", __func__); - return -EPERM; - } - /* pn544_dev_read() should return the rsp if JNI has requested the cold reset*/ - pn544_dev->state_flags |= (P544_FLAG_ESE_COLD_RESET_FROM_DRIVER); - init_completion(&ese_cold_reset_sema); - /* write command to I2C line*/ - do{ - ret = i2c_master_send(pn544_dev->client, cmd_ese_cold_reset, sizeof(cmd_ese_cold_reset)); - if (ret == sizeof(cmd_ese_cold_reset)) { - break; - } - loop--; - usleep_range(5000, 6000); - }while(loop); - if(!loop && (ret != sizeof(cmd_ese_cold_reset)) ){ - pr_err("%s : i2c_master_send returned %ld\n", __func__, ret); - pn544_dev->state_flags &= ~(P544_FLAG_ESE_COLD_RESET_FROM_DRIVER); - return -EIO; - } - - pr_info("%s: NxpNciX: %ld > %02X%02X%02X \n", __func__, ret,cmd_ese_cold_reset[0], - cmd_ese_cold_reset[1],cmd_ese_cold_reset[2]); - ret = 0x00; - if(pn544_dev->state_flags & P544_FLAG_NFC_ON)/* NFC_ON */ - { - /* Read is pending from the NFC service which will complete the ese_cold_reset_sema */ - if(wait_for_completion_timeout(&ese_cold_reset_sema, tempJ) == 0){ - pr_err("%s: Timeout", __func__); - ese_cold_reset_rsp[3] = -EAGAIN; // Failure case - } - }else { /* NFC_OFF */ - /* call the pn544_dev_read() */ - filp.f_flags &= ~O_NONBLOCK; - ret = pn544_dev_read(&filp, NULL,3, 0); - } - if(0x00 == ret) /* success case */ - ret = ese_cold_reset_rsp[3]; - pn544_dev->state_flags &= ~(P544_FLAG_ESE_COLD_RESET_FROM_DRIVER); - /* Return the status to the SPI Driver */ - pr_info("%s: exit, Status:%ld", __func__,ret); - return ret; -} -EXPORT_SYMBOL(p61_cold_reset); - -static int signal_handler(p61_access_state_t state, long nfc_pid) -{ - struct siginfo sinfo; - pid_t pid; - struct task_struct *task; - int sigret = 0, ret = 0; - pr_info("%s: Enter\n", __func__); - - if(nfc_pid == 0) - { - pr_info("nfc_pid is clear don't call signal_handler.\n"); - } - else - { - memset(&sinfo, 0, sizeof(struct siginfo)); - sinfo.si_signo = SIG_NFC; - sinfo.si_code = SI_QUEUE; - sinfo.si_int = state; - pid = nfc_pid; - - task = pid_task(find_vpid(pid), PIDTYPE_PID); - if(task) - { - pr_info("%s.\n", task->comm); - sigret = force_sig_info(SIG_NFC, &sinfo, task); - if(sigret < 0){ - pr_info("send_sig_info failed..... sigret %d.\n", sigret); - ret = -1; - //msleep(60); - } - } - else{ - pr_info("finding task from PID failed\r\n"); - ret = -1; - } - } - pr_info("%s: Exit ret = %d\n", __func__, ret); - return ret; -} -static void svdd_sync_onoff(long nfc_service_pid, p61_access_state_t origin) -{ - int timeout = 100; //100 ms timeout - unsigned long tempJ = msecs_to_jiffies(timeout); - pr_info("%s: Enter nfc_service_pid: %ld\n", __func__, nfc_service_pid); - if(nfc_service_pid) - { - if (0 == signal_handler(origin, nfc_service_pid)) - { - sema_init(&svdd_sync_onoff_sema, 0); - pr_info("Waiting for svdd protection response"); - if(down_timeout(&svdd_sync_onoff_sema, tempJ) != 0) - { - pr_info("svdd wait protection: Timeout"); - } - pr_info("svdd wait protection : released"); - } - } -} -static int release_svdd_wait(void) -{ - pr_info("%s: Enter \n", __func__); - up(&svdd_sync_onoff_sema); - return 0; -} - -static void dwp_OnOff(long nfc_service_pid, p61_access_state_t origin) -{ - int timeout = 100; //100 ms timeout - unsigned long tempJ = msecs_to_jiffies(timeout); - if(nfc_service_pid) - { - if (0 == signal_handler(origin, nfc_service_pid)) - { - init_completion(&dwp_onoff_sema); - if(wait_for_completion_timeout(&dwp_onoff_sema, tempJ) != 0) - { - pr_info("Dwp On/off wait protection: Timeout"); - } - pr_info("Dwp On/Off wait protection : released"); - } - } -} -static int release_dwpOnOff_wait(void) -{ - pr_info("%s: Enter \n", __func__); - complete(&dwp_onoff_sema); - return 0; -} - -static int pn544_dev_open(struct inode *inode, struct file *filp) -{ - struct pn544_dev *pn544_dev = container_of(filp->private_data, - struct pn544_dev, - pn544_device); - - filp->private_data = pn544_dev; - pn544_dev->state_flags |= (P544_FLAG_NFC_ON); - pr_debug("%s : %d,%d\n", __func__, imajor(inode), iminor(inode)); - - return 0; -} - -static int set_nfc_pid(unsigned long arg) -{ - pr_info("%s : The NFC Service PID is %ld\n", __func__, arg); - pn544_dev->nfc_service_pid = arg; - return 0; -} - -long pn544_dev_ioctl(struct file *filp, unsigned int cmd, - unsigned long arg) -{ - /* Free pass autobahn area, not protected. Use it carefullly. START */ - switch(cmd) - { - case P544_GET_ESE_ACCESS: - return get_ese_lock(P61_STATE_WIRED, arg); - break; - case P544_REL_SVDD_WAIT: - return release_svdd_wait(); - break; - case P544_SET_NFC_SERVICE_PID: - return set_nfc_pid(arg); - break; - case P544_REL_DWPONOFF_WAIT: - return release_dwpOnOff_wait(); - break; - default: - break; - } - /* Free pass autobahn area, not protected. Use it carefullly. END */ - - p61_access_lock(pn544_dev); - switch (cmd) { - case PN544_SET_PWR: - { - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - if (arg == 2) { - if (current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO) && (pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME)) - { - /* NFCC fw/download should not be allowed if p61 is used - * by SPI - */ - pr_info("%s NFCC should not be allowed to reset/FW download \n", __func__); - p61_access_unlock(pn544_dev); - return -EBUSY; /* Device or resource busy */ - } - pn544_dev->nfc_ven_enabled = true; - if ((pn544_dev->spi_ven_enabled == false && !(pn544_dev->secure_timer_cnt)) - || (pn544_dev->chip_pwr_scheme == PN80T_EXT_PMU_SCHEME)) - { - /* power on with firmware download (requires hw reset) - */ - pr_info("%s power on with firmware\n", __func__); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - if (pn544_dev->firm_gpio) { - p61_update_access_state(pn544_dev, P61_STATE_DWNLD, true); - gpio_set_value(pn544_dev->firm_gpio, 1); - } - - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - } - } else if (arg == 1) { - /* power on */ - if (pn544_dev->firm_gpio) { - if ((current_state & (P61_STATE_WIRED|P61_STATE_SPI|P61_STATE_SPI_PRIO))== 0){ - p61_update_access_state(pn544_dev, P61_STATE_IDLE, true); - } - if(current_state & P61_STATE_DWNLD){ - p61_update_access_state(pn544_dev, P61_STATE_DWNLD, false); - } - gpio_set_value(pn544_dev->firm_gpio, 0); - } - - pn544_dev->nfc_ven_enabled = true; - #ifndef VEN_ALWAYS_ON - if (pn544_dev->spi_ven_enabled == false || (pn544_dev->chip_pwr_scheme == PN80T_EXT_PMU_SCHEME)) { - gpio_set_value(pn544_dev->ven_gpio, 1); - } - #endif - } else if (arg == 0) { - /* power off */ - if (pn544_dev->firm_gpio) { - if ((current_state & (P61_STATE_WIRED|P61_STATE_SPI|P61_STATE_SPI_PRIO))== 0){ - p61_update_access_state(pn544_dev, P61_STATE_IDLE, true); - } - gpio_set_value(pn544_dev->firm_gpio, 0); - } - - pn544_dev->nfc_ven_enabled = false; - /* Don't change Ven state if spi made it high */ - #ifndef VEN_ALWAYS_ON - if ((pn544_dev->spi_ven_enabled == false && !(pn544_dev->secure_timer_cnt)) - || (pn544_dev->chip_pwr_scheme == PN80T_EXT_PMU_SCHEME)) { - gpio_set_value(pn544_dev->ven_gpio, 0); - } - #endif - /* HiKey Compilation fix */ - #ifndef HiKey_620_COMPILATION_FIX - if (sIsWakeLocked == true) { - wake_unlock(&nfc_wake_lock); - sIsWakeLocked = false; - } - #endif - } else if (arg == 3) { - /*NFC Service called ISO-RST*/ - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - if(current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) { - p61_access_unlock(pn544_dev); - return -EPERM; /* Operation not permitted */ - } - if(current_state & P61_STATE_WIRED) { - p61_update_access_state(pn544_dev, P61_STATE_WIRED, false); - } -#ifdef ISO_RST - gpio_set_value(pn544_dev->iso_rst_gpio, 0); - msleep(50); - gpio_set_value(pn544_dev->iso_rst_gpio, 1); - msleep(50); - pr_info("%s ISO RESET from DWP DONE\n", __func__); -#endif - } else if (arg == 4) { - pr_info("%s FW dwldioctl called from NFC \n", __func__); - /*NFC Service called FW dwnld*/ - if (pn544_dev->firm_gpio) { - p61_update_access_state(pn544_dev, P61_STATE_DWNLD, true); - gpio_set_value(pn544_dev->firm_gpio, 1); - pn544_dev->state_flags |= (P544_FLAG_FW_DNLD); - msleep(10); - } - } else if (arg == 5) { - pn544_dev->state_flags |= P544_FLAG_NFC_VEN_RESET; - pn544_disable_irq(pn544_dev); - wake_up(&pn544_dev->read_wq); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - pr_info("%s VEN reset DONE >>>>>>>\n", __func__); - } else if (arg == 6) { - if (pn544_dev->firm_gpio) { - gpio_set_value(pn544_dev->firm_gpio, 0); - pn544_dev->state_flags &= ~(P544_FLAG_FW_DNLD); - } - pr_info("%s FW GPIO set to 0x00 >>>>>>>\n", __func__); - }else { - pr_err("%s bad arg %lu\n", __func__, arg); - /* changed the p61 state to idle*/ - p61_access_unlock(pn544_dev); - return -EINVAL; - } - } - break; - case P61_SET_SPI_PWR: - { - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - if (arg == 1) { - pr_info("%s : PN61_SET_SPI_PWR - power on ese\n", __func__); - if ((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0) - { - p61_update_access_state(pn544_dev, P61_STATE_SPI, true); - /*To handle triple mode protection signal - NFC service when SPI session started*/ - if (!(current_state & P61_STATE_JCP_DWNLD)){ - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - /*signal_handler(P61_STATE_SPI, pn544_dev->nfc_service_pid);*/ - dwp_OnOff(pn544_dev->nfc_service_pid, P61_STATE_SPI); - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } - pn544_dev->spi_ven_enabled = true; - - if(pn544_dev->chip_pwr_scheme == PN80T_EXT_PMU_SCHEME) - break; - #ifndef VEN_ALWAYS_ON - if (pn544_dev->nfc_ven_enabled == false) - { - /* provide power to NFCC if, NFC service not provided */ - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - } - #endif - /* pull the gpio to high once NFCC is power on*/ - gpio_set_value(pn544_dev->ese_pwr_gpio, 1); - - /* Delay (10ms) after SVDD_PWR_ON to allow JCOP to bootup (5ms jcop boot time + 5ms guard time) */ - usleep_range(10000, 12000); - - } else { - pr_info("%s : PN61_SET_SPI_PWR - power on ese failed \n", __func__); - p61_access_unlock(pn544_dev); - return -EBUSY; /* Device or resource busy */ - } - } else if (arg == 0) { - pr_info("%s : PN61_SET_SPI_PWR - power off ese\n", __func__); - if(current_state & P61_STATE_SPI_PRIO){ - p61_update_access_state(pn544_dev, P61_STATE_SPI_PRIO, false); - if (!(current_state & P61_STATE_JCP_DWNLD)) - { - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - if(!(current_state & P61_STATE_WIRED)) - { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START | - P61_STATE_SPI_PRIO_END); - }else { - signal_handler(P61_STATE_SPI_PRIO_END, pn544_dev->nfc_service_pid); - } - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } else if (!(current_state & P61_STATE_WIRED)) { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START); - } - pn544_dev->spi_ven_enabled = false; - - if(pn544_dev->chip_pwr_scheme == PN80T_EXT_PMU_SCHEME) - break; - - /* if secure timer is running, Delay the SPI close by 25ms after sending End of Apdu to enable eSE go into DPD - gracefully (20ms after EOS + 5ms DPD settlement time) */ - if(pn544_dev->secure_timer_cnt) - usleep_range(25000, 30000); - - if (!(current_state & P61_STATE_WIRED) && !(pn544_dev->secure_timer_cnt)) - { -#ifndef JCOP_4X_VALIDATION - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); - /* Delay (2.5ms) after SVDD_PWR_OFF for the shutdown settlement time */ - usleep_range(2500, 3000); -#endif - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - } -#ifndef JCOP_4X_VALIDATION - #ifndef VEN_ALWAYS_ON - if ((pn544_dev->nfc_ven_enabled == false) && !(pn544_dev->secure_timer_cnt)) { - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - } - #endif -#endif - }else if(current_state & P61_STATE_SPI){ - p61_update_access_state(pn544_dev, P61_STATE_SPI, false); - if (!(current_state & P61_STATE_WIRED) && - (pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME) && - !(current_state & P61_STATE_JCP_DWNLD)) - { - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START | P61_STATE_SPI_END); - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - /* if secure timer is running, Delay the SPI close by 25ms after sending End of Apdu to enable eSE go into DPD - gracefully (20ms after EOS + 5ms DPD settlement time) */ - if(pn544_dev->secure_timer_cnt) - usleep_range(25000, 30000); - - if (!(pn544_dev->secure_timer_cnt)) { -#ifndef JCOP_4X_VALIDATION - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); - /* Delay (2.5ms) after SVDD_PWR_OFF for the shutdown settlement time */ - usleep_range(2500, 3000); -#endif - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - } - } - /*If JCOP3.2 or 3.3 for handling triple mode - protection signal NFC service */ - else - { - if (!(current_state & P61_STATE_JCP_DWNLD)) - { - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - if(pn544_dev->chip_pwr_scheme == PN80T_LEGACY_PWR_SCHEME) - { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START | P61_STATE_SPI_END); - } else { - signal_handler(P61_STATE_SPI_END, pn544_dev->nfc_service_pid); - } - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } else if (pn544_dev->chip_pwr_scheme == PN80T_LEGACY_PWR_SCHEME) { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START); - } - if(pn544_dev->chip_pwr_scheme == PN80T_LEGACY_PWR_SCHEME) - { -#ifndef JCOP_4X_VALIDATION - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); -#endif - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - pr_info("PN80T legacy ese_pwr_gpio off %s", __func__); - } - } - pn544_dev->spi_ven_enabled = false; -#ifndef VEN_ALWAYS_ON - if (pn544_dev->nfc_ven_enabled == false && (pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME) - && !(pn544_dev->secure_timer_cnt)) { - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - } -#endif - } else { - pr_err("%s : PN61_SET_SPI_PWR - failed, current_state = %x \n", - __func__, pn544_dev->p61_current_state); - p61_access_unlock(pn544_dev); - return -EPERM; /* Operation not permitted */ - } - }else if (arg == 2) { - pr_info("%s : PN61_SET_SPI_PWR - reset\n", __func__); - if (current_state & (P61_STATE_IDLE|P61_STATE_SPI|P61_STATE_SPI_PRIO)) { - if (pn544_dev->spi_ven_enabled == false) - { - pn544_dev->spi_ven_enabled = true; - #ifndef VEN_ALWAYS_ON - if ((pn544_dev->nfc_ven_enabled == false) && (pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME)) { - /* provide power to NFCC if, NFC service not provided */ - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - } - #endif - } - if(pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME && !(pn544_dev->secure_timer_cnt)) - { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START); -#ifndef JCOP_4X_VALIDATION - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); -#endif - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - msleep(10); - if(!gpio_get_value(pn544_dev->ese_pwr_gpio)) - gpio_set_value(pn544_dev->ese_pwr_gpio, 1); - msleep(10); - } - } else { - pr_info("%s : PN61_SET_SPI_PWR - reset failed \n", __func__); - p61_access_unlock(pn544_dev); - return -EBUSY; /* Device or resource busy */ - } - }else if (arg == 3) { - pr_info("%s : PN61_SET_SPI_PWR - Prio Session Start power on ese\n", __func__); - if ((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0) { - p61_update_access_state(pn544_dev, P61_STATE_SPI_PRIO, true); - if (current_state & P61_STATE_WIRED){ - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - /*signal_handler(P61_STATE_SPI_PRIO, pn544_dev->nfc_service_pid);*/ - dwp_OnOff(pn544_dev->nfc_service_pid, P61_STATE_SPI_PRIO); - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } - pn544_dev->spi_ven_enabled = true; - if(pn544_dev->chip_pwr_scheme != PN80T_EXT_PMU_SCHEME) - { - #ifndef VEN_ALWAYS_ON - if (pn544_dev->nfc_ven_enabled == false) { - /* provide power to NFCC if, NFC service not provided */ - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - } - #endif - /* pull the gpio to high once NFCC is power on*/ - gpio_set_value(pn544_dev->ese_pwr_gpio, 1); - - /* Delay (10ms) after SVDD_PWR_ON to allow JCOP to bootup (5ms jcop boot time + 5ms guard time) */ - usleep_range(10000, 12000); - } - }else { - pr_info("%s : Prio Session Start power on ese failed \n", __func__); - p61_access_unlock(pn544_dev); - return -EBUSY; /* Device or resource busy */ - } - }else if (arg == 4) { - if (current_state & P61_STATE_SPI_PRIO) - { - pr_info("%s : PN61_SET_SPI_PWR - Prio Session Ending...\n", __func__); - p61_update_access_state(pn544_dev, P61_STATE_SPI_PRIO, false); - /*after SPI prio timeout, the state is changing from SPI prio to SPI */ - p61_update_access_state(pn544_dev, P61_STATE_SPI, true); - if (current_state & P61_STATE_WIRED) - { - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - signal_handler(P61_STATE_SPI_PRIO_END, pn544_dev->nfc_service_pid); - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } - } - else - { - pr_info("%s : PN61_SET_SPI_PWR - Prio Session End failed \n", __func__); - p61_access_unlock(pn544_dev); - return -EBADRQC; /* Device or resource busy */ - } - } else if(arg == 5){ - release_ese_lock(P61_STATE_SPI); - } else if (arg == 6) { - /*SPI Service called ISO-RST*/ - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - if(current_state & P61_STATE_WIRED) { - p61_access_unlock(pn544_dev); - return -EPERM; /* Operation not permitted */ - } - if(current_state & P61_STATE_SPI) { - p61_update_access_state(pn544_dev, P61_STATE_SPI, false); - }else if(current_state & P61_STATE_SPI_PRIO) { - p61_update_access_state(pn544_dev, P61_STATE_SPI_PRIO, false); - } -#ifdef ISO_RST - gpio_set_value(pn544_dev->iso_rst_gpio, 0); - msleep(50); - gpio_set_value(pn544_dev->iso_rst_gpio, 1); - msleep(50); - pr_info("%s ISO RESET from SPI DONE\n", __func__); -#endif - } - else { - pr_info("%s bad ese pwr arg %lu\n", __func__, arg); - p61_access_unlock(pn544_dev); - return -EBADRQC; /* Invalid request code */ - } - } - break; - - case P61_GET_PWR_STATUS: - { - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - pr_info("%s: P61_GET_PWR_STATUS = %x",__func__, current_state); - put_user(current_state, (int __user *)arg); - } - break; - - case PN544_SET_DWNLD_STATUS: - { - long ret; - ret = set_jcop_download_state(arg); - if(ret < 0) - { - p61_access_unlock(pn544_dev); - return ret; - } - } - break; - - case P61_SET_WIRED_ACCESS: - { - p61_access_state_t current_state = P61_STATE_INVALID; - p61_get_access_state(pn544_dev, ¤t_state); - if (arg == 1) - { - if (current_state) - { - pr_info("%s : P61_SET_WIRED_ACCESS - enabling\n", __func__); - p61_update_access_state(pn544_dev, P61_STATE_WIRED, true); - if (current_state & P61_STATE_SPI_PRIO) - { - if(pn544_dev->nfc_service_pid){ - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - signal_handler(P61_STATE_SPI_PRIO, pn544_dev->nfc_service_pid); - } - else{ - pr_info(" invalid nfc service pid....signalling failed%s ---- %ld", __func__, pn544_dev->nfc_service_pid); - } - } - if((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0 && (pn544_dev->chip_pwr_scheme == PN67T_PWR_SCHEME)) - gpio_set_value(pn544_dev->ese_pwr_gpio, 1); - } else { - pr_info("%s : P61_SET_WIRED_ACCESS - enabling failed \n", __func__); - p61_access_unlock(pn544_dev); - return -EBUSY; /* Device or resource busy */ - } - } else if (arg == 0) { - pr_info("%s : P61_SET_WIRED_ACCESS - disabling \n", __func__); - if (current_state & P61_STATE_WIRED){ - p61_update_access_state(pn544_dev, P61_STATE_WIRED, false); - if((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0 && (pn544_dev->chip_pwr_scheme == PN67T_PWR_SCHEME)) - { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START); - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - } - } else { - pr_err("%s : P61_SET_WIRED_ACCESS - failed, current_state = %x \n", - __func__, pn544_dev->p61_current_state); - p61_access_unlock(pn544_dev); - return -EPERM; /* Operation not permitted */ - } - } - else if(arg == 2) - { - pr_info("%s : P61_ESE_GPIO_LOW \n", __func__); - if(pn544_dev->chip_pwr_scheme == PN67T_PWR_SCHEME) - { - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_START); - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); - svdd_sync_onoff(pn544_dev->nfc_service_pid, P61_STATE_SPI_SVDD_SYNC_END); - } - } - else if(arg == 3) - { - pr_info("%s : P61_ESE_GPIO_HIGH \n", __func__); - if(pn544_dev->chip_pwr_scheme == PN67T_PWR_SCHEME) - gpio_set_value(pn544_dev->ese_pwr_gpio, 1); - } - else if(arg == 4) - { - release_ese_lock(P61_STATE_WIRED); - } - else { - pr_info("%s P61_SET_WIRED_ACCESS - bad arg %lu\n", __func__, arg); - p61_access_unlock(pn544_dev); - return -EBADRQC; /* Invalid request code */ - } - } - break; - case P544_SET_POWER_SCHEME: - { - if(arg == PN67T_PWR_SCHEME) - { - pn544_dev->chip_pwr_scheme = PN67T_PWR_SCHEME; - pr_info("%s : The power scheme is set to PN67T legacy \n", __func__); - } - else if(arg == PN80T_LEGACY_PWR_SCHEME) - { - pn544_dev->chip_pwr_scheme = PN80T_LEGACY_PWR_SCHEME; - pr_info("%s : The power scheme is set to PN80T_LEGACY_PWR_SCHEME,\n", __func__); - } - else if(arg == PN80T_EXT_PMU_SCHEME) - { - pn544_dev->chip_pwr_scheme = PN80T_EXT_PMU_SCHEME; - pr_info("%s : The power scheme is set to PN80T_EXT_PMU_SCHEME,\n", __func__); - } - else - { - pr_info("%s : The power scheme is invalid,\n", __func__); - } - } - break; - case P544_SECURE_TIMER_SESSION: - { - secure_timer_operation(pn544_dev, arg); - } - break; - default: - pr_err("%s bad ioctl %u\n", __func__, cmd); - p61_access_unlock(pn544_dev); - return -EINVAL; - } - p61_access_unlock(pn544_dev); - return 0; -} -EXPORT_SYMBOL(pn544_dev_ioctl); - -static void secure_timer_workqueue(struct work_struct *Wq) -{ - p61_access_state_t current_state = P61_STATE_INVALID; - printk( KERN_INFO "secure_timer_callback: called (%lu).\n", jiffies); - /* Locking the critical section: ESE_PWR_OFF to allow eSE to shutdown peacefully :: START */ - get_ese_lock(P61_STATE_WIRED, MAX_ESE_ACCESS_TIME_OUT_MS); - p61_update_access_state(pn544_dev, P61_STATE_SECURE_MODE, false); - p61_get_access_state(pn544_dev, ¤t_state); - - if((current_state & (P61_STATE_SPI|P61_STATE_SPI_PRIO)) == 0) - { - printk( KERN_INFO "secure_timer_callback: make se_pwer_gpio low, state = %d", current_state); - gpio_set_value(pn544_dev->ese_pwr_gpio, 0); - /* Delay (2.5ms) after SVDD_PWR_OFF for the shutdown settlement time */ - usleep_range(2500, 3000); - #ifndef VEN_ALWAYS_ON - if(pn544_dev->nfc_service_pid == 0x00) - { - gpio_set_value(pn544_dev->ven_gpio, 0); - printk( KERN_INFO "secure_timer_callback :make ven_gpio low, state = %d", current_state); - } - #endif - } - pn544_dev->secure_timer_cnt = 0; - /* Locking the critical section: ESE_PWR_OFF to allow eSE to shutdown peacefully :: END */ - release_ese_lock(P61_STATE_WIRED); - return; -} - -static void secure_timer_callback( unsigned long data ) -{ - /* Flush and push the timer callback event to the bottom half(work queue) - to be executed later, at a safer time */ - flush_workqueue(pn544_dev->pSecureTimerCbWq); - queue_work(pn544_dev->pSecureTimerCbWq, &pn544_dev->wq_task); - return; -} - -static long start_seccure_timer(unsigned long timer_value) -{ - long ret = -EINVAL; - pr_info("start_seccure_timer: enter\n"); - /* Delete the timer if timer pending */ - if(timer_pending(&secure_timer) == 1) - { - pr_info("start_seccure_timer: delete pending timer \n"); - /* delete timer if already pending */ - del_timer(&secure_timer); - } - /* Start the timer if timer value is non-zero */ - if(timer_value) - { - init_timer(&secure_timer); - setup_timer( &secure_timer, secure_timer_callback, 0 ); - - pr_info("start_seccure_timer: timeout %lums (%lu)\n",timer_value, jiffies ); - ret = mod_timer( &secure_timer, jiffies + msecs_to_jiffies(timer_value)); - if (ret) - pr_info("start_seccure_timer: Error in mod_timer\n"); - } - return ret; -} - -static long secure_timer_operation(struct pn544_dev *pn544_dev, unsigned long arg) -{ - long ret = -EINVAL; - unsigned long timer_value = arg; - - printk( KERN_INFO "secure_timer_operation, %d\n",pn544_dev->chip_pwr_scheme); - if(pn544_dev->chip_pwr_scheme == PN80T_LEGACY_PWR_SCHEME) - { - ret = start_seccure_timer(timer_value); - if(!ret) - { - pn544_dev->secure_timer_cnt = 1; - p61_update_access_state(pn544_dev, P61_STATE_SECURE_MODE, true); - } - else - { - pn544_dev->secure_timer_cnt = 0; - p61_update_access_state(pn544_dev, P61_STATE_SECURE_MODE, false); - pr_info("%s :Secure timer reset \n", __func__); - } - } - else - { - pr_info("%s :Secure timer session not applicable \n", __func__); - } - return ret; -} - -static long set_jcop_download_state(unsigned long arg) -{ - p61_access_state_t current_state = P61_STATE_INVALID; - long ret = 0; - p61_get_access_state(pn544_dev, ¤t_state); - pr_info("%s:Enter PN544_SET_DWNLD_STATUS:JCOP Dwnld state arg = %ld",__func__, arg); - if(arg == JCP_DWNLD_INIT) - { - if(pn544_dev->nfc_service_pid) - { - pr_info("nfc service pid %s ---- %ld", __func__, pn544_dev->nfc_service_pid); - signal_handler(JCP_DWNLD_INIT, pn544_dev->nfc_service_pid); - } - else - { - if (current_state & P61_STATE_JCP_DWNLD) - { - ret = -EINVAL; - } - else - { - p61_update_access_state(pn544_dev, P61_STATE_JCP_DWNLD, true); - } - } - } - else if (arg == JCP_DWNLD_START) - { - if (current_state & P61_STATE_JCP_DWNLD) - { - ret = -EINVAL; - } - else - { - p61_update_access_state(pn544_dev, P61_STATE_JCP_DWNLD, true); - } - } - else if (arg == JCP_SPI_DWNLD_COMPLETE) - { - if(pn544_dev->nfc_service_pid) - { - signal_handler(JCP_DWP_DWNLD_COMPLETE, pn544_dev->nfc_service_pid); - } - p61_update_access_state(pn544_dev, P61_STATE_JCP_DWNLD, false); - } - else if (arg == JCP_DWP_DWNLD_COMPLETE) - { - p61_update_access_state(pn544_dev, P61_STATE_JCP_DWNLD, false); - } - else - { - pr_info("%s bad ese pwr arg %lu\n", __func__, arg); - p61_access_unlock(pn544_dev); - return -EBADRQC; /* Invalid request code */ - } - pr_info("%s: PN544_SET_DWNLD_STATUS = %x",__func__, current_state); - - return ret; -} - -int get_ese_lock(p61_access_state_t p61_current_state, int timeout) -{ - unsigned long tempJ = msecs_to_jiffies(timeout); - if(down_timeout(&ese_access_sema, tempJ) != 0) - { - printk("get_ese_lock: timeout p61_current_state = %d\n", p61_current_state); - return -EBUSY; - } - return 0; -} -EXPORT_SYMBOL(get_ese_lock); - -static void release_ese_lock(p61_access_state_t p61_current_state) -{ - up(&ese_access_sema); -} - - -static const struct file_operations pn544_dev_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .read = pn544_dev_read, - .write = pn544_dev_write, - .open = pn544_dev_open, - .release = pn544_dev_release, - .unlocked_ioctl = pn544_dev_ioctl, -}; -#if DRAGON_NFC -static int pn544_parse_dt(struct device *dev, - struct pn544_i2c_platform_data *data) -{ - struct device_node *np = dev->of_node; - int errorno = 0; - -#if !NEXUS5x - data->irq_gpio = of_get_named_gpio(np, "nxp,pn544-irq", 0); - if ((!gpio_is_valid(data->irq_gpio))) - return -EINVAL; - - data->ven_gpio = of_get_named_gpio(np, "nxp,pn544-ven", 0); - if ((!gpio_is_valid(data->ven_gpio))) - return -EINVAL; - - data->firm_gpio = of_get_named_gpio(np, "nxp,pn544-fw-dwnld", 0); - if ((!gpio_is_valid(data->firm_gpio))) - return -EINVAL; - - data->ese_pwr_gpio = of_get_named_gpio(np, "nxp,pn544-ese-pwr", 0); - if ((!gpio_is_valid(data->ese_pwr_gpio))) - return -EINVAL; - data->iso_rst_gpio = of_get_named_gpio(np, "nxp,pn544-iso-pwr-rst", 0); - if ((!gpio_is_valid(data->iso_rst_gpio))) - return -EINVAL; -#else - data->ven_gpio = of_get_named_gpio_flags(np, - "nxp,gpio_ven", 0, NULL); - data->firm_gpio = of_get_named_gpio_flags(np, - "nxp,gpio_mode", 0, NULL); - data->irq_gpio = of_get_named_gpio_flags(np, - "nxp,gpio_irq", 0, NULL); -#endif - pr_info("%s: %d, %d, %d, %d, %d error:%d\n", __func__, - data->irq_gpio, data->ven_gpio, data->firm_gpio, data->iso_rst_gpio, - data->ese_pwr_gpio, errorno); - - return errorno; -} -#endif - -static int pn544_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret; - struct pn544_i2c_platform_data *platform_data; - //struct pn544_dev *pn544_dev; - -#if !DRAGON_NFC - platform_data = client->dev.platform_data; -#else - struct device_node *node = client->dev.of_node; - - if (node) { - platform_data = devm_kzalloc(&client->dev, - sizeof(struct pn544_i2c_platform_data), GFP_KERNEL); - if (!platform_data) { - dev_err(&client->dev, - "nfc-nci probe: Failed to allocate memory\n"); - return -ENOMEM; - } - ret = pn544_parse_dt(&client->dev, platform_data); - if (ret) - { - pr_info("%s pn544_parse_dt failed", __func__); - } - client->irq = gpio_to_irq(platform_data->irq_gpio); - if (client->irq < 0) - { - pr_info("%s gpio to irq failed", __func__); - } - } else { - platform_data = client->dev.platform_data; - } -#endif - if (platform_data == NULL) { - pr_err("%s : nfc probe fail\n", __func__); - return -ENODEV; - } - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - pr_err("%s : need I2C_FUNC_I2C\n", __func__); - return -ENODEV; - } -#if !DRAGON_NFC - ret = gpio_request(platform_data->irq_gpio, "nfc_int"); - if (ret) - return -ENODEV; - ret = gpio_request(platform_data->ven_gpio, "nfc_ven"); - if (ret) - goto err_ven; - ret = gpio_request(platform_data->ese_pwr_gpio, "nfc_ese_pwr"); - if (ret) - goto err_ese_pwr; - if (platform_data->firm_gpio) { - ret = gpio_request(platform_data->firm_gpio, "nfc_firm"); - if (ret) - goto err_firm; - } -#ifdef ISO_RST - if(platform_data->iso_rst_gpio) { - ret = gpio_request(platform_data->iso_rst_gpio, "nfc_iso_rst"); - if (ret) - goto err_iso_rst; - } -#endif -#endif - pn544_dev = kzalloc(sizeof(*pn544_dev), GFP_KERNEL); - if (pn544_dev == NULL) { - dev_err(&client->dev, - "failed to allocate memory for module data\n"); - ret = -ENOMEM; - goto err_exit; - } - - pn544_dev->irq_gpio = platform_data->irq_gpio; - pn544_dev->ven_gpio = platform_data->ven_gpio; - pn544_dev->firm_gpio = platform_data->firm_gpio; - pn544_dev->ese_pwr_gpio = platform_data->ese_pwr_gpio; -#ifdef ISO_RST - pn544_dev->iso_rst_gpio = platform_data->iso_rst_gpio; -#endif - pn544_dev->p61_current_state = P61_STATE_IDLE; - pn544_dev->nfc_ven_enabled = false; - pn544_dev->spi_ven_enabled = false; - pn544_dev->chip_pwr_scheme = PN67T_PWR_SCHEME; - pn544_dev->client = client; - pn544_dev->secure_timer_cnt = 0; - - pn544_dev->state_flags = 0x00; - ret = gpio_direction_input(pn544_dev->irq_gpio); - if (ret < 0) { - pr_err("%s :not able to set irq_gpio as input\n", __func__); - goto err_ven; - } - #ifndef VEN_ALWAYS_ON - ret = gpio_direction_output(pn544_dev->ven_gpio, 0); - if (ret < 0) { - pr_err("%s : not able to set ven_gpio as output\n", __func__); - goto err_firm; - } - #else - ret = gpio_direction_output(pn544_dev->ven_gpio, 1); - if (ret < 0) { - pr_err("%s : not able to set ven_gpio as output\n", __func__); - goto err_firm; - } - #endif - ret = gpio_direction_output(pn544_dev->ese_pwr_gpio, 0); - if (ret < 0) { - pr_err("%s : not able to set ese_pwr gpio as output\n", __func__); - goto err_ese_pwr; - } - if (platform_data->firm_gpio) { - ret = gpio_direction_output(pn544_dev->firm_gpio, 0); - if (ret < 0) { - pr_err("%s : not able to set firm_gpio as output\n", - __func__); - goto err_exit; - } - } -#ifdef ISO_RST - ret = gpio_direction_output(pn544_dev->iso_rst_gpio, 0); - if (ret < 0) { - pr_err("%s : not able to set iso rst gpio as output\n", __func__); - goto err_iso_rst; - } -#endif - /* init mutex and queues */ - init_waitqueue_head(&pn544_dev->read_wq); - mutex_init(&pn544_dev->read_mutex); - sema_init(&ese_access_sema, 1); - mutex_init(&pn544_dev->p61_state_mutex); - spin_lock_init(&pn544_dev->irq_enabled_lock); - pn544_dev->pSecureTimerCbWq = create_workqueue(SECURE_TIMER_WORK_QUEUE); - INIT_WORK(&pn544_dev->wq_task, secure_timer_workqueue); - pn544_dev->pn544_device.minor = MISC_DYNAMIC_MINOR; - pn544_dev->pn544_device.name = "pn553"; - pn544_dev->pn544_device.fops = &pn544_dev_fops; - - ret = misc_register(&pn544_dev->pn544_device); - if (ret) { - pr_err("%s : misc_register failed\n", __FILE__); - goto err_misc_register; - } - /* HiKey Compilation fix */ - #ifndef HiKey_620_COMPILATION_FIX - wake_lock_init(&nfc_wake_lock, WAKE_LOCK_SUSPEND, "NFCWAKE"); - #endif -#ifdef ISO_RST - /* Setting ISO RESET pin high to power ESE during init */ - gpio_set_value(pn544_dev->iso_rst_gpio, 1); -#endif - /* request irq. the irq is set whenever the chip has data available - * for reading. it is cleared when all data has been read. - */ - pr_info("%s : requesting IRQ %d\n", __func__, client->irq); - pn544_dev->irq_enabled = true; - ret = request_irq(client->irq, pn544_dev_irq_handler, - IRQF_TRIGGER_HIGH, client->name, pn544_dev); - if (ret) { - dev_err(&client->dev, "request_irq failed\n"); - goto err_request_irq_failed; - } - enable_irq_wake(pn544_dev->client->irq); - pn544_disable_irq(pn544_dev); - i2c_set_clientdata(client, pn544_dev); -#ifdef VEN_ALWAYS_ON - msleep(5); /* VBAT--> VDDIO(HIGH) + Guardtime of min 5ms --> VEN(HIGH) */ - /* VEN toggle(reset) to proceed */ - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(5); - gpio_set_value(pn544_dev->ven_gpio, 1); -#endif - -#if HWINFO - /* - * This function is used only if - * hardware info is required during probe*/ - check_hw_info(); -#endif - - return 0; - - err_request_irq_failed: - misc_deregister(&pn544_dev->pn544_device); - err_misc_register: - mutex_destroy(&pn544_dev->read_mutex); - mutex_destroy(&pn544_dev->p61_state_mutex); - kfree(pn544_dev); - err_exit: - if (pn544_dev->firm_gpio) - gpio_free(platform_data->firm_gpio); - err_firm: - gpio_free(platform_data->ese_pwr_gpio); - err_ese_pwr: - gpio_free(platform_data->ven_gpio); - err_ven: - gpio_free(platform_data->irq_gpio); -#ifdef ISO_RST - err_iso_rst: - gpio_free(platform_data->iso_rst_gpio); -#endif - return ret; -} - -static int pn544_remove(struct i2c_client *client) -{ - struct pn544_dev *pn544_dev; - - pn544_dev = i2c_get_clientdata(client); - free_irq(client->irq, pn544_dev); - misc_deregister(&pn544_dev->pn544_device); - mutex_destroy(&pn544_dev->read_mutex); - mutex_destroy(&pn544_dev->p61_state_mutex); - gpio_free(pn544_dev->irq_gpio); - gpio_free(pn544_dev->ven_gpio); - gpio_free(pn544_dev->ese_pwr_gpio); - destroy_workqueue(pn544_dev->pSecureTimerCbWq); -#ifdef ISO_RST - gpio_free(pn544_dev->iso_rst_gpio); -#endif - pn544_dev->p61_current_state = P61_STATE_INVALID; - pn544_dev->nfc_ven_enabled = false; - pn544_dev->spi_ven_enabled = false; - - if (pn544_dev->firm_gpio) - gpio_free(pn544_dev->firm_gpio); - kfree(pn544_dev); - - return 0; -} - -static const struct i2c_device_id pn544_id[] = { -#if NEXUS5x - { "pn548", 0 }, -#else - { "pn544", 0 }, -#endif - { } -}; -#if DRAGON_NFC -static struct of_device_id pn544_i2c_dt_match[] = { - { -#if NEXUS5x - .compatible = "nxp,pn548", -#else - .compatible = "nxp,pn544", -#endif - }, - {} -}; -#endif -static struct i2c_driver pn544_driver = { - .id_table = pn544_id, - .probe = pn544_probe, - .remove = pn544_remove, - .driver = { - .owner = THIS_MODULE, -#if NEXUS5x - .name = "pn548", -#else - .name = "pn544", -#endif -#if DRAGON_NFC - .of_match_table = pn544_i2c_dt_match, -#endif - }, -}; -#if HWINFO -/****************************************************************************** - * Function check_hw_info - * - * Description This function is called during pn544_probe to retrieve - * HW info. - * Useful get HW information in case of previous FW download is - * interrupted and core reset is not allowed. - * This function checks if core reset is allowed, if not - * sets DWNLD_REQ(firm_gpio) , ven reset and sends firmware - * get version command. - * In response HW information will be received. - * - * Returns None - * - ******************************************************************************/ -static void check_hw_info() { - char read_data[20]; - int ret, get_version_len = 8, retry_count = 0; - static uint8_t cmd_reset_nci[] = {0x20, 0x00, 0x01, 0x00}; - char get_version_cmd[] = - {0x00, 0x04, 0xF1, 0x00, 0x00, 0x00, 0x6E, 0xEF}; - - pr_info("%s :Enter\n", __func__); - - /* - * Ven Reset before sending core Reset - * This is to check core reset is allowed or not. - * If not allowed then previous FW download is interrupted in between - * */ - pr_info("%s :Ven Reset \n", __func__); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - ret = i2c_master_send(pn544_dev->client, cmd_reset_nci, 4); - - if (ret == 4) { - pr_info("%s : core reset write success\n", __func__); - } else { - - /* - * Core reset failed. - * set the DWNLD_REQ , do ven reset - * send firmware download info command - * */ - pr_err("%s : write failed\n", __func__); - pr_info("%s power on with firmware\n", __func__); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - if (pn544_dev->firm_gpio) { - p61_update_access_state(pn544_dev, P61_STATE_DWNLD, true); - gpio_set_value(pn544_dev->firm_gpio, 1); - } - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 0); - msleep(10); - gpio_set_value(pn544_dev->ven_gpio, 1); - msleep(10); - ret = i2c_master_send(pn544_dev->client, get_version_cmd, get_version_len); - if (ret != get_version_len) { - ret = -EIO; - pr_err("%s : write_failed \n", __func__); - } - else { - pr_info("%s :data sent\n", __func__); - } - - ret = 0; - - while (retry_count < 10) { - - /* - * Wait for read interrupt - * If spurious interrupt is received retry again - * */ - pn544_dev->irq_enabled = true; - enable_irq(pn544_dev->client->irq); - enable_irq_wake(pn544_dev->client->irq); - ret = wait_event_interruptible( - pn544_dev->read_wq, - !pn544_dev->irq_enabled); - - pn544_disable_irq(pn544_dev); - - if (gpio_get_value(pn544_dev->irq_gpio)) - break; - - pr_warning("%s: spurious interrupt detected\n", __func__); - retry_count ++; - } - - if(ret) { - return; - } - - /* - * Read response data and copy into hw_type_info - * */ - ret = i2c_master_recv(pn544_dev->client, read_data, 14); - - if(ret) { - memcpy(hw_info.data, read_data, ret); - hw_info.len = ret; - pr_info("%s :data received len : %d\n", __func__,hw_info.len); - } - else { - pr_err("%s :Read Failed\n", __func__); - } - } -} -#endif -/* - * module load/unload record keeping - */ - -static int __init pn544_dev_init(void) -{ - pr_info("Loading pn544 driver\n"); - return i2c_add_driver(&pn544_driver); -} -module_init(pn544_dev_init); - -static void __exit pn544_dev_exit(void) -{ - pr_info("Unloading pn544 driver\n"); - i2c_del_driver(&pn544_driver); -} -module_exit(pn544_dev_exit); - -MODULE_AUTHOR("Sylvain Fonteneau"); -MODULE_DESCRIPTION("NFC PN544 driver"); -MODULE_LICENSE("GPL"); diff --git a/pn553-i2c/pn553.h b/pn553-i2c/pn553.h deleted file mode 100644 index ccc2830bc3..0000000000 --- a/pn553-i2c/pn553.h +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright (C) 2010 Trusted Logic S.A. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -/****************************************************************************** - * - * The original Work has been changed by NXP Semiconductors. - * - * Copyright (C) 2013-2014 NXP Semiconductors - * * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - ******************************************************************************/ -#ifndef _PN553_H_ -#define _PN553_H_ -#define PN544_MAGIC 0xE9 - -/* - * PN544 power control via ioctl - * PN544_SET_PWR(0): power off - * PN544_SET_PWR(1): power on - * PN544_SET_PWR(2): reset and power on with firmware download enabled - */ -#define PN544_SET_PWR _IOW(PN544_MAGIC, 0x01, long) - -/* - * SPI Request NFCC to enable p61 power, only in param - * Only for SPI - * level 1 = Enable power - * level 0 = Disable power - */ -#define P61_SET_SPI_PWR _IOW(PN544_MAGIC, 0x02, long) - -/* SPI or DWP can call this ioctl to get the current - * power state of P61 - * -*/ -#define P61_GET_PWR_STATUS _IOR(PN544_MAGIC, 0x03, long) - -/* DWP side this ioctl will be called - * level 1 = Wired access is enabled/ongoing - * level 0 = Wired access is disalbed/stopped -*/ -#define P61_SET_WIRED_ACCESS _IOW(PN544_MAGIC, 0x04, long) - -/* - NFC Init will call the ioctl to register the PID with the i2c driver -*/ -#define P544_SET_NFC_SERVICE_PID _IOW(PN544_MAGIC, 0x05, long) - -/* - NFC and SPI will call the ioctl to get the i2c/spi bus access -*/ -#define P544_GET_ESE_ACCESS _IOW(PN544_MAGIC, 0x06, long) -/* - NFC and SPI will call the ioctl to update the power scheme -*/ -#define P544_SET_POWER_SCHEME _IOW(PN544_MAGIC, 0x07, long) - -/* - NFC will call the ioctl to release the svdd protection -*/ -#define P544_REL_SVDD_WAIT _IOW(PN544_MAGIC, 0x08, long) - -/* SPI or DWP can call this ioctl to get the current - * power state of P61 - * -*/ -#define PN544_SET_DWNLD_STATUS _IOW(PN544_MAGIC, 0x09, long) -/* - NFC will call the ioctl to release the dwp on/off protection -*/ -#define P544_REL_DWPONOFF_WAIT _IOW(PN544_MAGIC, 0x0A, long) - -/* - NFC will call the ioctl to start Secure Timer -*/ - -#define P544_SECURE_TIMER_SESSION _IOW(PN544_MAGIC, 0x0B, long) - -#define MAX_ESE_ACCESS_TIME_OUT_MS 200 /*100 milliseconds*/ - -/* - NFC_ON: Driver is being used by the NFC service -*/ -#define P544_FLAG_NFC_ON 0x01 -/* - FW_DNLD: NFC_ON and FW download is going on -*/ -#define P544_FLAG_FW_DNLD 0x02 -/* - FW_DNLD: NFC_ON and FW download is going on -*/ -#define P544_FLAG_ESE_COLD_RESET_FROM_DRIVER 0x04 -/* - FW_DNLD: NFC_ON and FW download with VEN reset -*/ -#define P544_FLAG_NFC_VEN_RESET 0x08 - -typedef enum p61_access_state{ - P61_STATE_INVALID = 0x0000, - P61_STATE_IDLE = 0x0100, /* p61 is free to use */ - P61_STATE_WIRED = 0x0200, /* p61 is being accessed by DWP (NFCC)*/ - P61_STATE_SPI = 0x0400, /* P61 is being accessed by SPI */ - P61_STATE_DWNLD = 0x0800, /* NFCC fw download is in progress */ - P61_STATE_SPI_PRIO = 0x1000, /*Start of p61 access by SPI on priority*/ - P61_STATE_SPI_PRIO_END = 0x2000, /*End of p61 access by SPI on priority*/ - P61_STATE_SPI_END = 0x4000, - P61_STATE_JCP_DWNLD = 0x8000,/* JCOP downlad in progress */ - P61_STATE_SECURE_MODE = 0x100000, /* secure mode state*/ - P61_STATE_SPI_SVDD_SYNC_START = 0x0001, /*ESE_VDD Low req by SPI*/ - P61_STATE_SPI_SVDD_SYNC_END = 0x0002, /*ESE_VDD is Low by SPI*/ - P61_STATE_DWP_SVDD_SYNC_START = 0x0004, /*ESE_VDD Low req by Nfc*/ - P61_STATE_DWP_SVDD_SYNC_END = 0x0008 /*ESE_VDD is Low by Nfc*/ -}p61_access_state_t; - -typedef enum chip_type_pwr_scheme{ - PN67T_PWR_SCHEME = 0x01, - PN80T_LEGACY_PWR_SCHEME, - PN80T_EXT_PMU_SCHEME, -}chip_pwr_scheme_t; - -typedef enum jcop_dwnld_state{ - JCP_DWNLD_IDLE = P61_STATE_JCP_DWNLD, /* jcop dwnld is ongoing*/ - JCP_DWNLD_INIT=0x8010, /* jcop dwonload init state*/ - JCP_DWNLD_START=0x8020, /* download started */ - JCP_SPI_DWNLD_COMPLETE=0x8040, /* jcop download complete in spi interface*/ - JCP_DWP_DWNLD_COMPLETE=0x8080, /* jcop download complete */ -} jcop_dwnld_state_t; - -struct pn544_i2c_platform_data { - unsigned int irq_gpio; - unsigned int ven_gpio; - unsigned int firm_gpio; - unsigned int ese_pwr_gpio; /* gpio to give power to p61, only TEE should use this */ - unsigned int iso_rst_gpio; /* gpio used for ISO hard reset P73*/ -}; - -struct hw_type_info { - /* - * Response of get_version_cmd will be stored in data - * byte structure : - * byte 0-1 : Header - * byte 2 : Status - * byte 3 : Hardware Version - * byte 4 : ROM code - * byte 5 : 0x00 constant - * byte 6-7 : Protected data version - * byte 8-9 : Trim data version - * byte 10-11 : FW version - * byte 12-13 : CRC - * */ - char data[20]; - int len; -}; -#endif