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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Platform level USB initialization for FS USB OTG controller on omap1
- *
- * Copyright (C) 2004 Texas Instruments, Inc.
- */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/platform_device.h>
- #include <linux/dma-map-ops.h>
- #include <linux/io.h>
- #include <linux/delay.h>
- #include <linux/soc/ti/omap1-io.h>
- #include <asm/irq.h>
- #include "hardware.h"
- #include "mux.h"
- #include "usb.h"
- #include "common.h"
- /* These routines should handle the standard chip-specific modes
- * for usb0/1/2 ports, covering basic mux and transceiver setup.
- *
- * Some board-*.c files will need to set up additional mux options,
- * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
- */
- /* TESTED ON:
- * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
- * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
- * - 5912 OSK UDC, with *nonstandard* A-to-A cable
- * - 1510 Innovator UDC with bundled usb0 cable
- * - 1510 Innovator OHCI with bundled usb1/usb2 cable
- * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
- * - 1710 custom development board using alternate pin group
- * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
- */
- #define INT_USB_IRQ_GEN IH2_BASE + 20
- #define INT_USB_IRQ_NISO IH2_BASE + 30
- #define INT_USB_IRQ_ISO IH2_BASE + 29
- #define INT_USB_IRQ_HGEN INT_USB_HHC_1
- #define INT_USB_IRQ_OTG IH2_BASE + 8
- #ifdef CONFIG_ARCH_OMAP_OTG
- static void __init
- omap_otg_init(struct omap_usb_config *config)
- {
- u32 syscon;
- int alt_pingroup = 0;
- u16 w;
- /* NOTE: no bus or clock setup (yet?) */
- syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
- if (!(syscon & OTG_RESET_DONE))
- pr_debug("USB resets not complete?\n");
- //omap_writew(0, OTG_IRQ_EN);
- /* pin muxing and transceiver pinouts */
- if (config->pins[0] > 2) /* alt pingroup 2 */
- alt_pingroup = 1;
- syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
- syscon |= config->usb1_init(config->pins[1]);
- syscon |= config->usb2_init(config->pins[2], alt_pingroup);
- pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
- omap_writel(syscon, OTG_SYSCON_1);
- syscon = config->hmc_mode;
- syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
- #ifdef CONFIG_USB_OTG
- if (config->otg)
- syscon |= OTG_EN;
- #endif
- pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
- omap_readl(USB_TRANSCEIVER_CTRL));
- pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
- omap_writel(syscon, OTG_SYSCON_2);
- printk("USB: hmc %d", config->hmc_mode);
- if (!alt_pingroup)
- pr_cont(", usb2 alt %d wires", config->pins[2]);
- else if (config->pins[0])
- pr_cont(", usb0 %d wires%s", config->pins[0],
- is_usb0_device(config) ? " (dev)" : "");
- if (config->pins[1])
- pr_cont(", usb1 %d wires", config->pins[1]);
- if (!alt_pingroup && config->pins[2])
- pr_cont(", usb2 %d wires", config->pins[2]);
- if (config->otg)
- pr_cont(", Mini-AB on usb%d", config->otg - 1);
- pr_cont("\n");
- /* leave USB clocks/controllers off until needed */
- w = omap_readw(ULPD_SOFT_REQ);
- w &= ~SOFT_USB_CLK_REQ;
- omap_writew(w, ULPD_SOFT_REQ);
- w = omap_readw(ULPD_CLOCK_CTRL);
- w &= ~USB_MCLK_EN;
- w |= DIS_USB_PVCI_CLK;
- omap_writew(w, ULPD_CLOCK_CTRL);
- syscon = omap_readl(OTG_SYSCON_1);
- syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
- #if IS_ENABLED(CONFIG_USB_OMAP)
- if (config->otg || config->register_dev) {
- struct platform_device *udc_device = config->udc_device;
- int status;
- syscon &= ~DEV_IDLE_EN;
- udc_device->dev.platform_data = config;
- status = platform_device_register(udc_device);
- if (status)
- pr_debug("can't register UDC device, %d\n", status);
- }
- #endif
- #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
- if (config->otg || config->register_host) {
- struct platform_device *ohci_device = config->ohci_device;
- int status;
- syscon &= ~HST_IDLE_EN;
- ohci_device->dev.platform_data = config;
- status = platform_device_register(ohci_device);
- if (status)
- pr_debug("can't register OHCI device, %d\n", status);
- }
- #endif
- #ifdef CONFIG_USB_OTG
- if (config->otg) {
- struct platform_device *otg_device = config->otg_device;
- int status;
- syscon &= ~OTG_IDLE_EN;
- otg_device->dev.platform_data = config;
- status = platform_device_register(otg_device);
- if (status)
- pr_debug("can't register OTG device, %d\n", status);
- }
- #endif
- pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
- omap_writel(syscon, OTG_SYSCON_1);
- }
- #else
- static void omap_otg_init(struct omap_usb_config *config) {}
- #endif
- #if IS_ENABLED(CONFIG_USB_OMAP)
- static struct resource udc_resources[] = {
- /* order is significant! */
- { /* registers */
- .start = UDC_BASE,
- .end = UDC_BASE + 0xff,
- .flags = IORESOURCE_MEM,
- }, { /* general IRQ */
- .start = INT_USB_IRQ_GEN,
- .flags = IORESOURCE_IRQ,
- }, { /* PIO IRQ */
- .start = INT_USB_IRQ_NISO,
- .flags = IORESOURCE_IRQ,
- }, { /* SOF IRQ */
- .start = INT_USB_IRQ_ISO,
- .flags = IORESOURCE_IRQ,
- },
- };
- static u64 udc_dmamask = ~(u32)0;
- static struct platform_device udc_device = {
- .name = "omap_udc",
- .id = -1,
- .dev = {
- .dma_mask = &udc_dmamask,
- .coherent_dma_mask = 0xffffffff,
- },
- .num_resources = ARRAY_SIZE(udc_resources),
- .resource = udc_resources,
- };
- static inline void udc_device_init(struct omap_usb_config *pdata)
- {
- /* IRQ numbers for omap7xx */
- if(cpu_is_omap7xx()) {
- udc_resources[1].start = INT_7XX_USB_GENI;
- udc_resources[2].start = INT_7XX_USB_NON_ISO;
- udc_resources[3].start = INT_7XX_USB_ISO;
- }
- pdata->udc_device = &udc_device;
- }
- #else
- static inline void udc_device_init(struct omap_usb_config *pdata)
- {
- }
- #endif
- /* The dmamask must be set for OHCI to work */
- static u64 ohci_dmamask = ~(u32)0;
- static struct resource ohci_resources[] = {
- {
- .start = OMAP_OHCI_BASE,
- .end = OMAP_OHCI_BASE + 0xff,
- .flags = IORESOURCE_MEM,
- },
- {
- .start = INT_USB_IRQ_HGEN,
- .flags = IORESOURCE_IRQ,
- },
- };
- static struct platform_device ohci_device = {
- .name = "ohci",
- .id = -1,
- .dev = {
- .dma_mask = &ohci_dmamask,
- .coherent_dma_mask = 0xffffffff,
- },
- .num_resources = ARRAY_SIZE(ohci_resources),
- .resource = ohci_resources,
- };
- static inline void ohci_device_init(struct omap_usb_config *pdata)
- {
- if (!IS_ENABLED(CONFIG_USB_OHCI_HCD))
- return;
- if (cpu_is_omap7xx())
- ohci_resources[1].start = INT_7XX_USB_HHC_1;
- pdata->ohci_device = &ohci_device;
- pdata->ocpi_enable = &ocpi_enable;
- }
- #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
- static struct resource otg_resources[] = {
- /* order is significant! */
- {
- .start = OTG_BASE,
- .end = OTG_BASE + 0xff,
- .flags = IORESOURCE_MEM,
- }, {
- .start = INT_USB_IRQ_OTG,
- .flags = IORESOURCE_IRQ,
- },
- };
- static struct platform_device otg_device = {
- .name = "omap_otg",
- .id = -1,
- .num_resources = ARRAY_SIZE(otg_resources),
- .resource = otg_resources,
- };
- static inline void otg_device_init(struct omap_usb_config *pdata)
- {
- if (cpu_is_omap7xx())
- otg_resources[1].start = INT_7XX_USB_OTG;
- pdata->otg_device = &otg_device;
- }
- #else
- static inline void otg_device_init(struct omap_usb_config *pdata)
- {
- }
- #endif
- static u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
- {
- u32 syscon1 = 0;
- if (nwires == 0) {
- if (!cpu_is_omap15xx()) {
- u32 l;
- /* pulldown D+/D- */
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l &= ~(3 << 1);
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- return 0;
- }
- if (is_device) {
- if (cpu_is_omap7xx()) {
- omap_cfg_reg(AA17_7XX_USB_DM);
- omap_cfg_reg(W16_7XX_USB_PU_EN);
- omap_cfg_reg(W17_7XX_USB_VBUSI);
- omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
- omap_cfg_reg(W19_7XX_USB_DCRST);
- } else
- omap_cfg_reg(W4_USB_PUEN);
- }
- if (nwires == 2) {
- u32 l;
- // omap_cfg_reg(P9_USB_DP);
- // omap_cfg_reg(R8_USB_DM);
- if (cpu_is_omap15xx()) {
- /* This works on 1510-Innovator */
- return 0;
- }
- /* NOTES:
- * - peripheral should configure VBUS detection!
- * - only peripherals may use the internal D+/D- pulldowns
- * - OTG support on this port not yet written
- */
- /* Don't do this for omap7xx -- it causes USB to not work correctly */
- if (!cpu_is_omap7xx()) {
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l &= ~(7 << 4);
- if (!is_device)
- l |= (3 << 1);
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- return 3 << 16;
- }
- /* alternate pin config, external transceiver */
- if (cpu_is_omap15xx()) {
- printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
- return 0;
- }
- omap_cfg_reg(V6_USB0_TXD);
- omap_cfg_reg(W9_USB0_TXEN);
- omap_cfg_reg(W5_USB0_SE0);
- if (nwires != 3)
- omap_cfg_reg(Y5_USB0_RCV);
- /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
- * may be able to use I2C requests to set those bits along
- * with VBUS switching and overcurrent detection.
- */
- if (nwires != 6) {
- u32 l;
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l &= ~CONF_USB2_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- switch (nwires) {
- case 3:
- syscon1 = 2;
- break;
- case 4:
- syscon1 = 1;
- break;
- case 6:
- syscon1 = 3;
- {
- u32 l;
- omap_cfg_reg(AA9_USB0_VP);
- omap_cfg_reg(R9_USB0_VM);
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l |= CONF_USB2_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- break;
- default:
- printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
- 0, nwires);
- }
- return syscon1 << 16;
- }
- static u32 __init omap1_usb1_init(unsigned nwires)
- {
- u32 syscon1 = 0;
- if (!cpu_is_omap15xx() && nwires != 6) {
- u32 l;
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l &= ~CONF_USB1_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- if (nwires == 0)
- return 0;
- /* external transceiver */
- omap_cfg_reg(USB1_TXD);
- omap_cfg_reg(USB1_TXEN);
- if (nwires != 3)
- omap_cfg_reg(USB1_RCV);
- if (cpu_is_omap15xx()) {
- omap_cfg_reg(USB1_SEO);
- omap_cfg_reg(USB1_SPEED);
- // SUSP
- } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
- omap_cfg_reg(W13_1610_USB1_SE0);
- omap_cfg_reg(R13_1610_USB1_SPEED);
- // SUSP
- } else if (cpu_is_omap1710()) {
- omap_cfg_reg(R13_1710_USB1_SE0);
- // SUSP
- } else {
- pr_debug("usb%d cpu unrecognized\n", 1);
- return 0;
- }
- switch (nwires) {
- case 2:
- goto bad;
- case 3:
- syscon1 = 2;
- break;
- case 4:
- syscon1 = 1;
- break;
- case 6:
- syscon1 = 3;
- omap_cfg_reg(USB1_VP);
- omap_cfg_reg(USB1_VM);
- if (!cpu_is_omap15xx()) {
- u32 l;
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l |= CONF_USB1_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- break;
- default:
- bad:
- printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
- 1, nwires);
- }
- return syscon1 << 20;
- }
- static u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
- {
- u32 syscon1 = 0;
- /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
- if (alt_pingroup || nwires == 0)
- return 0;
- if (!cpu_is_omap15xx() && nwires != 6) {
- u32 l;
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l &= ~CONF_USB2_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- /* external transceiver */
- if (cpu_is_omap15xx()) {
- omap_cfg_reg(USB2_TXD);
- omap_cfg_reg(USB2_TXEN);
- omap_cfg_reg(USB2_SEO);
- if (nwires != 3)
- omap_cfg_reg(USB2_RCV);
- /* there is no USB2_SPEED */
- } else if (cpu_is_omap16xx()) {
- omap_cfg_reg(V6_USB2_TXD);
- omap_cfg_reg(W9_USB2_TXEN);
- omap_cfg_reg(W5_USB2_SE0);
- if (nwires != 3)
- omap_cfg_reg(Y5_USB2_RCV);
- // FIXME omap_cfg_reg(USB2_SPEED);
- } else {
- pr_debug("usb%d cpu unrecognized\n", 1);
- return 0;
- }
- // omap_cfg_reg(USB2_SUSP);
- switch (nwires) {
- case 2:
- goto bad;
- case 3:
- syscon1 = 2;
- break;
- case 4:
- syscon1 = 1;
- break;
- case 5:
- goto bad;
- case 6:
- syscon1 = 3;
- if (cpu_is_omap15xx()) {
- omap_cfg_reg(USB2_VP);
- omap_cfg_reg(USB2_VM);
- } else {
- u32 l;
- omap_cfg_reg(AA9_USB2_VP);
- omap_cfg_reg(R9_USB2_VM);
- l = omap_readl(USB_TRANSCEIVER_CTRL);
- l |= CONF_USB2_UNI_R;
- omap_writel(l, USB_TRANSCEIVER_CTRL);
- }
- break;
- default:
- bad:
- printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
- 2, nwires);
- }
- return syscon1 << 24;
- }
- #ifdef CONFIG_ARCH_OMAP15XX
- /* OMAP-1510 OHCI has its own MMU for DMA */
- #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
- #define OMAP1510_LB_CLOCK_DIV 0xfffec10c
- #define OMAP1510_LB_MMU_CTL 0xfffec208
- #define OMAP1510_LB_MMU_LCK 0xfffec224
- #define OMAP1510_LB_MMU_LD_TLB 0xfffec228
- #define OMAP1510_LB_MMU_CAM_H 0xfffec22c
- #define OMAP1510_LB_MMU_CAM_L 0xfffec230
- #define OMAP1510_LB_MMU_RAM_H 0xfffec234
- #define OMAP1510_LB_MMU_RAM_L 0xfffec238
- /*
- * Bus address is physical address, except for OMAP-1510 Local Bus.
- * OMAP-1510 bus address is translated into a Local Bus address if the
- * OMAP bus type is lbus.
- */
- #define OMAP1510_LB_OFFSET UL(0x30000000)
- /*
- * OMAP-1510 specific Local Bus clock on/off
- */
- static int omap_1510_local_bus_power(int on)
- {
- if (on) {
- omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
- udelay(200);
- } else {
- omap_writel(0, OMAP1510_LB_MMU_CTL);
- }
- return 0;
- }
- /*
- * OMAP-1510 specific Local Bus initialization
- * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
- * See also arch/mach-omap/memory.h for __virt_to_dma() and
- * __dma_to_virt() which need to match with the physical
- * Local Bus address below.
- */
- static int omap_1510_local_bus_init(void)
- {
- unsigned int tlb;
- unsigned long lbaddr, physaddr;
- omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
- OMAP1510_LB_CLOCK_DIV);
- /* Configure the Local Bus MMU table */
- for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
- lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
- physaddr = tlb * 0x00100000 + PHYS_OFFSET;
- omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
- omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
- OMAP1510_LB_MMU_CAM_L);
- omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
- omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
- omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
- omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
- }
- /* Enable the walking table */
- omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
- udelay(200);
- return 0;
- }
- static void omap_1510_local_bus_reset(void)
- {
- omap_1510_local_bus_power(1);
- omap_1510_local_bus_init();
- }
- /* ULPD_DPLL_CTRL */
- #define DPLL_IOB (1 << 13)
- #define DPLL_PLL_ENABLE (1 << 4)
- #define DPLL_LOCK (1 << 0)
- /* ULPD_APLL_CTRL */
- #define APLL_NDPLL_SWITCH (1 << 0)
- static void __init omap_1510_usb_init(struct omap_usb_config *config)
- {
- unsigned int val;
- u16 w;
- config->usb0_init(config->pins[0], is_usb0_device(config));
- config->usb1_init(config->pins[1]);
- config->usb2_init(config->pins[2], 0);
- val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
- val |= (config->hmc_mode << 1);
- omap_writel(val, MOD_CONF_CTRL_0);
- printk("USB: hmc %d", config->hmc_mode);
- if (config->pins[0])
- pr_cont(", usb0 %d wires%s", config->pins[0],
- is_usb0_device(config) ? " (dev)" : "");
- if (config->pins[1])
- pr_cont(", usb1 %d wires", config->pins[1]);
- if (config->pins[2])
- pr_cont(", usb2 %d wires", config->pins[2]);
- pr_cont("\n");
- /* use DPLL for 48 MHz function clock */
- pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
- omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
- w = omap_readw(ULPD_APLL_CTRL);
- w &= ~APLL_NDPLL_SWITCH;
- omap_writew(w, ULPD_APLL_CTRL);
- w = omap_readw(ULPD_DPLL_CTRL);
- w |= DPLL_IOB | DPLL_PLL_ENABLE;
- omap_writew(w, ULPD_DPLL_CTRL);
- w = omap_readw(ULPD_SOFT_REQ);
- w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
- omap_writew(w, ULPD_SOFT_REQ);
- while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
- cpu_relax();
- #if IS_ENABLED(CONFIG_USB_OMAP)
- if (config->register_dev) {
- int status;
- udc_device.dev.platform_data = config;
- status = platform_device_register(&udc_device);
- if (status)
- pr_debug("can't register UDC device, %d\n", status);
- /* udc driver gates 48MHz by D+ pullup */
- }
- #endif
- if (IS_ENABLED(CONFIG_USB_OHCI_HCD) && config->register_host) {
- int status;
- ohci_device.dev.platform_data = config;
- dma_direct_set_offset(&ohci_device.dev, PHYS_OFFSET,
- OMAP1510_LB_OFFSET, (u64)-1);
- status = platform_device_register(&ohci_device);
- if (status)
- pr_debug("can't register OHCI device, %d\n", status);
- /* hcd explicitly gates 48MHz */
- config->lb_reset = omap_1510_local_bus_reset;
- }
- }
- #else
- static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
- #endif
- void __init omap1_usb_init(struct omap_usb_config *_pdata)
- {
- struct omap_usb_config *pdata;
- pdata = kmemdup(_pdata, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
- return;
- pdata->usb0_init = omap1_usb0_init;
- pdata->usb1_init = omap1_usb1_init;
- pdata->usb2_init = omap1_usb2_init;
- udc_device_init(pdata);
- ohci_device_init(pdata);
- otg_device_init(pdata);
- if (cpu_is_omap7xx() || cpu_is_omap16xx())
- omap_otg_init(pdata);
- else if (cpu_is_omap15xx())
- omap_1510_usb_init(pdata);
- else
- printk(KERN_ERR "USB: No init for your chip yet\n");
- }
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