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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Driver for Intel I82092AA PCI-PCMCIA bridge.
- *
- * (C) 2001 Red Hat, Inc.
- *
- * Author: Arjan Van De Ven <[email protected]>
- * Loosly based on i82365.c from the pcmcia-cs package
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/pci.h>
- #include <linux/init.h>
- #include <linux/workqueue.h>
- #include <linux/interrupt.h>
- #include <linux/device.h>
- #include <pcmcia/ss.h>
- #include <linux/io.h>
- #include "i82092aa.h"
- #include "i82365.h"
- MODULE_LICENSE("GPL");
- /* PCI core routines */
- static const struct pci_device_id i82092aa_pci_ids[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
- { }
- };
- MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
- static struct pci_driver i82092aa_pci_driver = {
- .name = "i82092aa",
- .id_table = i82092aa_pci_ids,
- .probe = i82092aa_pci_probe,
- .remove = i82092aa_pci_remove,
- };
- /* the pccard structure and its functions */
- static struct pccard_operations i82092aa_operations = {
- .init = i82092aa_init,
- .get_status = i82092aa_get_status,
- .set_socket = i82092aa_set_socket,
- .set_io_map = i82092aa_set_io_map,
- .set_mem_map = i82092aa_set_mem_map,
- };
- /* The card can do up to 4 sockets, allocate a structure for each of them */
- struct socket_info {
- int number;
- int card_state;
- /* 0 = no socket,
- * 1 = empty socket,
- * 2 = card but not initialized,
- * 3 = operational card
- */
- unsigned int io_base; /* base io address of the socket */
- struct pcmcia_socket socket;
- struct pci_dev *dev; /* The PCI device for the socket */
- };
- #define MAX_SOCKETS 4
- static struct socket_info sockets[MAX_SOCKETS];
- static int socket_count; /* shortcut */
- static int i82092aa_pci_probe(struct pci_dev *dev,
- const struct pci_device_id *id)
- {
- unsigned char configbyte;
- int i, ret;
- ret = pci_enable_device(dev);
- if (ret)
- return ret;
- /* PCI Configuration Control */
- pci_read_config_byte(dev, 0x40, &configbyte);
- switch (configbyte&6) {
- case 0:
- socket_count = 2;
- break;
- case 2:
- socket_count = 1;
- break;
- case 4:
- case 6:
- socket_count = 4;
- break;
- default:
- dev_err(&dev->dev,
- "Oops, you did something we didn't think of.\n");
- ret = -EIO;
- goto err_out_disable;
- }
- dev_info(&dev->dev, "configured as a %d socket device.\n",
- socket_count);
- if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
- ret = -EBUSY;
- goto err_out_disable;
- }
- for (i = 0; i < socket_count; i++) {
- sockets[i].card_state = 1; /* 1 = present but empty */
- sockets[i].io_base = pci_resource_start(dev, 0);
- sockets[i].dev = dev;
- sockets[i].socket.features |= SS_CAP_PCCARD;
- sockets[i].socket.map_size = 0x1000;
- sockets[i].socket.irq_mask = 0;
- sockets[i].socket.pci_irq = dev->irq;
- sockets[i].socket.cb_dev = dev;
- sockets[i].socket.owner = THIS_MODULE;
- sockets[i].number = i;
- if (card_present(i)) {
- sockets[i].card_state = 3;
- dev_dbg(&dev->dev, "slot %i is occupied\n", i);
- } else {
- dev_dbg(&dev->dev, "slot %i is vacant\n", i);
- }
- }
- /* Now, specifiy that all interrupts are to be done as PCI interrupts
- * bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt
- */
- configbyte = 0xFF;
- /* PCI Interrupt Routing Register */
- pci_write_config_byte(dev, 0x50, configbyte);
- /* Register the interrupt handler */
- dev_dbg(&dev->dev, "Requesting interrupt %i\n", dev->irq);
- ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED,
- "i82092aa", i82092aa_interrupt);
- if (ret) {
- dev_err(&dev->dev, "Failed to register IRQ %d, aborting\n",
- dev->irq);
- goto err_out_free_res;
- }
- for (i = 0; i < socket_count; i++) {
- sockets[i].socket.dev.parent = &dev->dev;
- sockets[i].socket.ops = &i82092aa_operations;
- sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
- ret = pcmcia_register_socket(&sockets[i].socket);
- if (ret)
- goto err_out_free_sockets;
- }
- return 0;
- err_out_free_sockets:
- if (i) {
- for (i--; i >= 0; i--)
- pcmcia_unregister_socket(&sockets[i].socket);
- }
- free_irq(dev->irq, i82092aa_interrupt);
- err_out_free_res:
- release_region(pci_resource_start(dev, 0), 2);
- err_out_disable:
- pci_disable_device(dev);
- return ret;
- }
- static void i82092aa_pci_remove(struct pci_dev *dev)
- {
- int i;
- free_irq(dev->irq, i82092aa_interrupt);
- for (i = 0; i < socket_count; i++)
- pcmcia_unregister_socket(&sockets[i].socket);
- }
- static DEFINE_SPINLOCK(port_lock);
- /* basic value read/write functions */
- static unsigned char indirect_read(int socket, unsigned short reg)
- {
- unsigned short int port;
- unsigned char val;
- unsigned long flags;
- spin_lock_irqsave(&port_lock, flags);
- reg += socket * 0x40;
- port = sockets[socket].io_base;
- outb(reg, port);
- val = inb(port+1);
- spin_unlock_irqrestore(&port_lock, flags);
- return val;
- }
- static void indirect_write(int socket, unsigned short reg, unsigned char value)
- {
- unsigned short int port;
- unsigned long flags;
- spin_lock_irqsave(&port_lock, flags);
- reg = reg + socket * 0x40;
- port = sockets[socket].io_base;
- outb(reg, port);
- outb(value, port+1);
- spin_unlock_irqrestore(&port_lock, flags);
- }
- static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
- {
- unsigned short int port;
- unsigned char val;
- unsigned long flags;
- spin_lock_irqsave(&port_lock, flags);
- reg = reg + socket * 0x40;
- port = sockets[socket].io_base;
- outb(reg, port);
- val = inb(port+1);
- val |= mask;
- outb(reg, port);
- outb(val, port+1);
- spin_unlock_irqrestore(&port_lock, flags);
- }
- static void indirect_resetbit(int socket,
- unsigned short reg, unsigned char mask)
- {
- unsigned short int port;
- unsigned char val;
- unsigned long flags;
- spin_lock_irqsave(&port_lock, flags);
- reg = reg + socket * 0x40;
- port = sockets[socket].io_base;
- outb(reg, port);
- val = inb(port+1);
- val &= ~mask;
- outb(reg, port);
- outb(val, port+1);
- spin_unlock_irqrestore(&port_lock, flags);
- }
- static void indirect_write16(int socket,
- unsigned short reg, unsigned short value)
- {
- unsigned short int port;
- unsigned char val;
- unsigned long flags;
- spin_lock_irqsave(&port_lock, flags);
- reg = reg + socket * 0x40;
- port = sockets[socket].io_base;
- outb(reg, port);
- val = value & 255;
- outb(val, port+1);
- reg++;
- outb(reg, port);
- val = value>>8;
- outb(val, port+1);
- spin_unlock_irqrestore(&port_lock, flags);
- }
- /* simple helper functions */
- /* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
- static int cycle_time = 120;
- static int to_cycles(int ns)
- {
- if (cycle_time != 0)
- return ns/cycle_time;
- else
- return 0;
- }
- /* Interrupt handler functionality */
- static irqreturn_t i82092aa_interrupt(int irq, void *dev)
- {
- int i;
- int loopcount = 0;
- int handled = 0;
- unsigned int events, active = 0;
- while (1) {
- loopcount++;
- if (loopcount > 20) {
- pr_err("i82092aa: infinite eventloop in interrupt\n");
- break;
- }
- active = 0;
- for (i = 0; i < socket_count; i++) {
- int csc;
- /* Inactive socket, should not happen */
- if (sockets[i].card_state == 0)
- continue;
- /* card status change register */
- csc = indirect_read(i, I365_CSC);
- if (csc == 0) /* no events on this socket */
- continue;
- handled = 1;
- events = 0;
- if (csc & I365_CSC_DETECT) {
- events |= SS_DETECT;
- dev_info(&sockets[i].dev->dev,
- "Card detected in socket %i!\n", i);
- }
- if (indirect_read(i, I365_INTCTL) & I365_PC_IOCARD) {
- /* For IO/CARDS, bit 0 means "read the card" */
- if (csc & I365_CSC_STSCHG)
- events |= SS_STSCHG;
- } else {
- /* Check for battery/ready events */
- if (csc & I365_CSC_BVD1)
- events |= SS_BATDEAD;
- if (csc & I365_CSC_BVD2)
- events |= SS_BATWARN;
- if (csc & I365_CSC_READY)
- events |= SS_READY;
- }
- if (events)
- pcmcia_parse_events(&sockets[i].socket, events);
- active |= events;
- }
- if (active == 0) /* no more events to handle */
- break;
- }
- return IRQ_RETVAL(handled);
- }
- /* socket functions */
- static int card_present(int socketno)
- {
- unsigned int val;
- if ((socketno < 0) || (socketno >= MAX_SOCKETS))
- return 0;
- if (sockets[socketno].io_base == 0)
- return 0;
- val = indirect_read(socketno, 1); /* Interface status register */
- if ((val&12) == 12)
- return 1;
- return 0;
- }
- static void set_bridge_state(int sock)
- {
- indirect_write(sock, I365_GBLCTL, 0x00);
- indirect_write(sock, I365_GENCTL, 0x00);
- indirect_setbit(sock, I365_INTCTL, 0x08);
- }
- static int i82092aa_init(struct pcmcia_socket *sock)
- {
- int i;
- struct resource res = { .start = 0, .end = 0x0fff };
- pccard_io_map io = { 0, 0, 0, 0, 1 };
- pccard_mem_map mem = { .res = &res, };
- for (i = 0; i < 2; i++) {
- io.map = i;
- i82092aa_set_io_map(sock, &io);
- }
- for (i = 0; i < 5; i++) {
- mem.map = i;
- i82092aa_set_mem_map(sock, &mem);
- }
- return 0;
- }
- static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
- {
- unsigned int sock = container_of(socket,
- struct socket_info, socket)->number;
- unsigned int status;
- /* Interface Status Register */
- status = indirect_read(sock, I365_STATUS);
- *value = 0;
- if ((status & I365_CS_DETECT) == I365_CS_DETECT)
- *value |= SS_DETECT;
- /* IO cards have a different meaning of bits 0,1 */
- /* Also notice the inverse-logic on the bits */
- if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
- /* IO card */
- if (!(status & I365_CS_STSCHG))
- *value |= SS_STSCHG;
- } else { /* non I/O card */
- if (!(status & I365_CS_BVD1))
- *value |= SS_BATDEAD;
- if (!(status & I365_CS_BVD2))
- *value |= SS_BATWARN;
- }
- if (status & I365_CS_WRPROT)
- (*value) |= SS_WRPROT; /* card is write protected */
- if (status & I365_CS_READY)
- (*value) |= SS_READY; /* card is not busy */
- if (status & I365_CS_POWERON)
- (*value) |= SS_POWERON; /* power is applied to the card */
- return 0;
- }
- static int i82092aa_set_socket(struct pcmcia_socket *socket,
- socket_state_t *state)
- {
- struct socket_info *sock_info = container_of(socket, struct socket_info,
- socket);
- unsigned int sock = sock_info->number;
- unsigned char reg;
- /* First, set the global controller options */
- set_bridge_state(sock);
- /* Values for the IGENC register */
- reg = 0;
- /* The reset bit has "inverse" logic */
- if (!(state->flags & SS_RESET))
- reg = reg | I365_PC_RESET;
- if (state->flags & SS_IOCARD)
- reg = reg | I365_PC_IOCARD;
- /* IGENC, Interrupt and General Control Register */
- indirect_write(sock, I365_INTCTL, reg);
- /* Power registers */
- reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
- if (state->flags & SS_PWR_AUTO) {
- dev_info(&sock_info->dev->dev, "Auto power\n");
- reg |= I365_PWR_AUTO; /* automatic power mngmnt */
- }
- if (state->flags & SS_OUTPUT_ENA) {
- dev_info(&sock_info->dev->dev, "Power Enabled\n");
- reg |= I365_PWR_OUT; /* enable power */
- }
- switch (state->Vcc) {
- case 0:
- break;
- case 50:
- dev_info(&sock_info->dev->dev,
- "setting voltage to Vcc to 5V on socket %i\n",
- sock);
- reg |= I365_VCC_5V;
- break;
- default:
- dev_err(&sock_info->dev->dev,
- "%s called with invalid VCC power value: %i",
- __func__, state->Vcc);
- return -EINVAL;
- }
- switch (state->Vpp) {
- case 0:
- dev_info(&sock_info->dev->dev,
- "not setting Vpp on socket %i\n", sock);
- break;
- case 50:
- dev_info(&sock_info->dev->dev,
- "setting Vpp to 5.0 for socket %i\n", sock);
- reg |= I365_VPP1_5V | I365_VPP2_5V;
- break;
- case 120:
- dev_info(&sock_info->dev->dev, "setting Vpp to 12.0\n");
- reg |= I365_VPP1_12V | I365_VPP2_12V;
- break;
- default:
- dev_err(&sock_info->dev->dev,
- "%s called with invalid VPP power value: %i",
- __func__, state->Vcc);
- return -EINVAL;
- }
- if (reg != indirect_read(sock, I365_POWER)) /* only write if changed */
- indirect_write(sock, I365_POWER, reg);
- /* Enable specific interrupt events */
- reg = 0x00;
- if (state->csc_mask & SS_DETECT)
- reg |= I365_CSC_DETECT;
- if (state->flags & SS_IOCARD) {
- if (state->csc_mask & SS_STSCHG)
- reg |= I365_CSC_STSCHG;
- } else {
- if (state->csc_mask & SS_BATDEAD)
- reg |= I365_CSC_BVD1;
- if (state->csc_mask & SS_BATWARN)
- reg |= I365_CSC_BVD2;
- if (state->csc_mask & SS_READY)
- reg |= I365_CSC_READY;
- }
- /* now write the value and clear the (probably bogus) pending stuff
- * by doing a dummy read
- */
- indirect_write(sock, I365_CSCINT, reg);
- (void)indirect_read(sock, I365_CSC);
- return 0;
- }
- static int i82092aa_set_io_map(struct pcmcia_socket *socket,
- struct pccard_io_map *io)
- {
- struct socket_info *sock_info = container_of(socket, struct socket_info,
- socket);
- unsigned int sock = sock_info->number;
- unsigned char map, ioctl;
- map = io->map;
- /* Check error conditions */
- if (map > 1)
- return -EINVAL;
- if ((io->start > 0xffff) || (io->stop > 0xffff)
- || (io->stop < io->start))
- return -EINVAL;
- /* Turn off the window before changing anything */
- if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
- indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
- /* write the new values */
- indirect_write16(sock, I365_IO(map)+I365_W_START, io->start);
- indirect_write16(sock, I365_IO(map)+I365_W_STOP, io->stop);
- ioctl = indirect_read(sock, I365_IOCTL) & ~I365_IOCTL_MASK(map);
- if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
- ioctl |= I365_IOCTL_16BIT(map);
- indirect_write(sock, I365_IOCTL, ioctl);
- /* Turn the window back on if needed */
- if (io->flags & MAP_ACTIVE)
- indirect_setbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
- return 0;
- }
- static int i82092aa_set_mem_map(struct pcmcia_socket *socket,
- struct pccard_mem_map *mem)
- {
- struct socket_info *sock_info = container_of(socket, struct socket_info,
- socket);
- unsigned int sock = sock_info->number;
- struct pci_bus_region region;
- unsigned short base, i;
- unsigned char map;
- pcibios_resource_to_bus(sock_info->dev->bus, ®ion, mem->res);
- map = mem->map;
- if (map > 4)
- return -EINVAL;
- if ((mem->card_start > 0x3ffffff) || (region.start > region.end) ||
- (mem->speed > 1000)) {
- dev_err(&sock_info->dev->dev,
- "invalid mem map for socket %i: %llx to %llx with a start of %x\n",
- sock,
- (unsigned long long)region.start,
- (unsigned long long)region.end,
- mem->card_start);
- return -EINVAL;
- }
- /* Turn off the window before changing anything */
- if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
- indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
- /* write the start address */
- base = I365_MEM(map);
- i = (region.start >> 12) & 0x0fff;
- if (mem->flags & MAP_16BIT)
- i |= I365_MEM_16BIT;
- if (mem->flags & MAP_0WS)
- i |= I365_MEM_0WS;
- indirect_write16(sock, base+I365_W_START, i);
- /* write the stop address */
- i = (region.end >> 12) & 0x0fff;
- switch (to_cycles(mem->speed)) {
- case 0:
- break;
- case 1:
- i |= I365_MEM_WS0;
- break;
- case 2:
- i |= I365_MEM_WS1;
- break;
- default:
- i |= I365_MEM_WS1 | I365_MEM_WS0;
- break;
- }
- indirect_write16(sock, base+I365_W_STOP, i);
- /* card start */
- i = ((mem->card_start - region.start) >> 12) & 0x3fff;
- if (mem->flags & MAP_WRPROT)
- i |= I365_MEM_WRPROT;
- if (mem->flags & MAP_ATTRIB)
- i |= I365_MEM_REG;
- indirect_write16(sock, base+I365_W_OFF, i);
- /* Enable the window if necessary */
- if (mem->flags & MAP_ACTIVE)
- indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
- return 0;
- }
- static int __init i82092aa_module_init(void)
- {
- return pci_register_driver(&i82092aa_pci_driver);
- }
- static void __exit i82092aa_module_exit(void)
- {
- pci_unregister_driver(&i82092aa_pci_driver);
- if (sockets[0].io_base > 0)
- release_region(sockets[0].io_base, 2);
- }
- module_init(i82092aa_module_init);
- module_exit(i82092aa_module_exit);
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