Commit 4020f2d7 authored by Alex Dubov's avatar Alex Dubov Committed by Linus Torvalds
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[PATCH] mmc: driver for TI FlashMedia card reader - source



Driver for TI Flash Media card reader.  At present, only MMC/SD cards are
supported.

[akpm@osdl.org: cleanups, build fixes]
Signed-off-by: default avatarAlex Dubov <oakad@yahoo.com>
Cc: Daniel Qarras <dqarras@yahoo.com>
Acked-by: default avatarPierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 856fe98f
......@@ -2854,6 +2854,11 @@ M: hlhung3i@gmail.com
W: http://tcp-lp-mod.sourceforge.net/
S: Maintained
TI FLASH MEDIA INTERFACE DRIVER
P: Alex Dubov
M: oakad@yahoo.com
S: Maintained
TI OMAP RANDOM NUMBER GENERATOR SUPPORT
P: Deepak Saxena
M: dsaxena@plexity.net
......
/*
* tifm_7xx1.c - TI FlashMedia driver
*
* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/tifm.h>
#include <linux/dma-mapping.h>
#define DRIVER_NAME "tifm_7xx1"
#define DRIVER_VERSION "0.6"
static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
{
int cnt;
unsigned long flags;
spin_lock_irqsave(&fm->lock, flags);
if (!fm->inhibit_new_cards) {
for (cnt = 0; cnt < fm->max_sockets; cnt++) {
if (fm->sockets[cnt] == sock) {
fm->remove_mask |= (1 << cnt);
queue_work(fm->wq, &fm->media_remover);
break;
}
}
}
spin_unlock_irqrestore(&fm->lock, flags);
}
static void tifm_7xx1_remove_media(void *adapter)
{
struct tifm_adapter *fm = adapter;
unsigned long flags;
int cnt;
struct tifm_dev *sock;
if (!class_device_get(&fm->cdev))
return;
spin_lock_irqsave(&fm->lock, flags);
for (cnt = 0; cnt < fm->max_sockets; cnt++) {
if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
printk(KERN_INFO DRIVER_NAME
": demand removing card from socket %d\n", cnt);
sock = fm->sockets[cnt];
fm->sockets[cnt] = 0;
fm->remove_mask &= ~(1 << cnt);
writel(0x0e00, sock->addr + SOCK_CONTROL);
writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
fm->addr + FM_SET_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&fm->lock, flags);
device_unregister(&sock->dev);
spin_lock_irqsave(&fm->lock, flags);
}
}
spin_unlock_irqrestore(&fm->lock, flags);
class_device_put(&fm->cdev);
}
static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id, struct pt_regs *regs)
{
struct tifm_adapter *fm = dev_id;
unsigned int irq_status;
unsigned int sock_irq_status, cnt;
spin_lock(&fm->lock);
irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
if (irq_status == 0 || irq_status == (~0)) {
spin_unlock(&fm->lock);
return IRQ_NONE;
}
if (irq_status & TIFM_IRQ_ENABLE) {
writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
for (cnt = 0; cnt < fm->max_sockets; cnt++) {
sock_irq_status = (irq_status >> cnt) &
(TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
if (fm->sockets[cnt]) {
if (sock_irq_status &&
fm->sockets[cnt]->signal_irq)
sock_irq_status = fm->sockets[cnt]->
signal_irq(fm->sockets[cnt],
sock_irq_status);
if (irq_status & (1 << cnt))
fm->remove_mask |= 1 << cnt;
} else {
if (irq_status & (1 << cnt))
fm->insert_mask |= 1 << cnt;
}
}
}
writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
if (!fm->inhibit_new_cards) {
if (!fm->remove_mask && !fm->insert_mask) {
writel(TIFM_IRQ_ENABLE,
fm->addr + FM_SET_INTERRUPT_ENABLE);
} else {
queue_work(fm->wq, &fm->media_remover);
queue_work(fm->wq, &fm->media_inserter);
}
}
spin_unlock(&fm->lock);
return IRQ_HANDLED;
}
static tifm_media_id tifm_7xx1_toggle_sock_power(char *sock_addr, int is_x2)
{
unsigned int s_state;
int cnt;
writel(0x0e00, sock_addr + SOCK_CONTROL);
for (cnt = 0; cnt < 100; cnt++) {
if (!(TIFM_SOCK_STATE_POWERED &
readl(sock_addr + SOCK_PRESENT_STATE)))
break;
msleep(10);
}
s_state = readl(sock_addr + SOCK_PRESENT_STATE);
if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
return FM_NULL;
if (is_x2) {
writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
} else {
// SmartMedia cards need extra 40 msec
if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
msleep(40);
writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
sock_addr + SOCK_CONTROL);
msleep(10);
writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
sock_addr + SOCK_CONTROL);
}
for (cnt = 0; cnt < 100; cnt++) {
if ((TIFM_SOCK_STATE_POWERED &
readl(sock_addr + SOCK_PRESENT_STATE)))
break;
msleep(10);
}
if (!is_x2)
writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
sock_addr + SOCK_CONTROL);
return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
}
inline static char *tifm_7xx1_sock_addr(char *base_addr, unsigned int sock_num)
{
return base_addr + ((sock_num + 1) << 10);
}
static void tifm_7xx1_insert_media(void *adapter)
{
struct tifm_adapter *fm = adapter;
unsigned long flags;
tifm_media_id media_id;
char *card_name = "xx";
int cnt, ok_to_register;
unsigned int insert_mask;
struct tifm_dev *new_sock = 0;
if (!class_device_get(&fm->cdev))
return;
spin_lock_irqsave(&fm->lock, flags);
insert_mask = fm->insert_mask;
fm->insert_mask = 0;
if (fm->inhibit_new_cards) {
spin_unlock_irqrestore(&fm->lock, flags);
class_device_put(&fm->cdev);
return;
}
spin_unlock_irqrestore(&fm->lock, flags);
for (cnt = 0; cnt < fm->max_sockets; cnt++) {
if (!(insert_mask & (1 << cnt)))
continue;
media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
fm->max_sockets == 2);
if (media_id) {
ok_to_register = 0;
new_sock = tifm_alloc_device(fm, cnt);
if (new_sock) {
new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
cnt);
new_sock->media_id = media_id;
switch (media_id) {
case 1:
card_name = "xd";
break;
case 2:
card_name = "ms";
break;
case 3:
card_name = "sd";
break;
default:
break;
}
snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
"tifm_%s%u:%u", card_name, fm->id, cnt);
printk(KERN_INFO DRIVER_NAME
": %s card detected in socket %d\n",
card_name, cnt);
spin_lock_irqsave(&fm->lock, flags);
if (!fm->sockets[cnt]) {
fm->sockets[cnt] = new_sock;
ok_to_register = 1;
}
spin_unlock_irqrestore(&fm->lock, flags);
if (!ok_to_register ||
device_register(&new_sock->dev)) {
spin_lock_irqsave(&fm->lock, flags);
fm->sockets[cnt] = 0;
spin_unlock_irqrestore(&fm->lock,
flags);
tifm_free_device(&new_sock->dev);
}
}
}
writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
fm->addr + FM_SET_INTERRUPT_ENABLE);
}
writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
class_device_put(&fm->cdev);
}
static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&fm->lock, flags);
fm->inhibit_new_cards = 1;
fm->remove_mask = 0xf;
fm->insert_mask = 0;
writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&fm->lock, flags);
flush_workqueue(fm->wq);
tifm_7xx1_remove_media(fm);
pci_set_power_state(dev, PCI_D3hot);
pci_disable_device(dev);
pci_save_state(dev);
return 0;
}
static int tifm_7xx1_resume(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
unsigned long flags;
pci_restore_state(dev);
pci_enable_device(dev);
pci_set_power_state(dev, PCI_D0);
pci_set_master(dev);
spin_lock_irqsave(&fm->lock, flags);
fm->inhibit_new_cards = 0;
writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
fm->addr + FM_SET_INTERRUPT_ENABLE);
fm->insert_mask = 0xf;
spin_unlock_irqrestore(&fm->lock, flags);
return 0;
}
static int tifm_7xx1_probe(struct pci_dev *dev,
const struct pci_device_id *dev_id)
{
struct tifm_adapter *fm;
int pci_dev_busy = 0;
int rc;
rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
if (rc)
return rc;
rc = pci_enable_device(dev);
if (rc)
return rc;
pci_set_master(dev);
rc = pci_request_regions(dev, DRIVER_NAME);
if (rc) {
pci_dev_busy = 1;
goto err_out;
}
pci_intx(dev, 1);
fm = tifm_alloc_adapter();
if (!fm) {
rc = -ENOMEM;
goto err_out_int;
}
fm->dev = &dev->dev;
fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
GFP_KERNEL);
if (!fm->sockets)
goto err_out_free;
INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media, fm);
INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media, fm);
fm->eject = tifm_7xx1_eject;
pci_set_drvdata(dev, fm);
fm->addr = ioremap(pci_resource_start(dev, 0),
pci_resource_len(dev, 0));
if (!fm->addr)
goto err_out_free;
rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
if (rc)
goto err_out_unmap;
rc = tifm_add_adapter(fm);
if (rc)
goto err_out_irq;
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
fm->addr + FM_SET_INTERRUPT_ENABLE);
fm->insert_mask = 0xf;
return 0;
err_out_irq:
free_irq(dev->irq, fm);
err_out_unmap:
iounmap(fm->addr);
err_out_free:
pci_set_drvdata(dev, NULL);
tifm_free_adapter(fm);
err_out_int:
pci_intx(dev, 0);
pci_release_regions(dev);
err_out:
if (!pci_dev_busy)
pci_disable_device(dev);
return rc;
}
static void tifm_7xx1_remove(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
unsigned long flags;
spin_lock_irqsave(&fm->lock, flags);
fm->inhibit_new_cards = 1;
fm->remove_mask = 0xf;
fm->insert_mask = 0;
writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&fm->lock, flags);
flush_workqueue(fm->wq);
tifm_7xx1_remove_media(fm);
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
free_irq(dev->irq, fm);
tifm_remove_adapter(fm);
pci_set_drvdata(dev, 0);
iounmap(fm->addr);
pci_intx(dev, 0);
pci_release_regions(dev);
pci_disable_device(dev);
tifm_free_adapter(fm);
}
static struct pci_device_id tifm_7xx1_pci_tbl [] = {
{ PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
0 }, /* xx21 - the one I have */
{ PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
0 }, /* xx12 - should be also supported */
{ }
};
static struct pci_driver tifm_7xx1_driver = {
.name = DRIVER_NAME,
.id_table = tifm_7xx1_pci_tbl,
.probe = tifm_7xx1_probe,
.remove = tifm_7xx1_remove,
.suspend = tifm_7xx1_suspend,
.resume = tifm_7xx1_resume,
};
static int __init tifm_7xx1_init(void)
{
return pci_register_driver(&tifm_7xx1_driver);
}
static void __exit tifm_7xx1_exit(void)
{
pci_unregister_driver(&tifm_7xx1_driver);
}
MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("TI FlashMedia host driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
MODULE_VERSION(DRIVER_VERSION);
module_init(tifm_7xx1_init);
module_exit(tifm_7xx1_exit);
/*
* tifm_core.c - TI FlashMedia driver
*
* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/tifm.h>
#include <linux/init.h>
#include <linux/idr.h>
#define DRIVER_NAME "tifm_core"
#define DRIVER_VERSION "0.6"
static DEFINE_IDR(tifm_adapter_idr);
static DEFINE_SPINLOCK(tifm_adapter_lock);
static tifm_media_id *tifm_device_match(tifm_media_id *ids,
struct tifm_dev *dev)
{
while (*ids) {
if (dev->media_id == *ids)
return ids;
ids++;
}
return NULL;
}
static int tifm_match(struct device *dev, struct device_driver *drv)
{
struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
struct tifm_driver *fm_drv;
fm_drv = container_of(drv, struct tifm_driver, driver);
if (!fm_drv->id_table)
return -EINVAL;
if (tifm_device_match(fm_drv->id_table, fm_dev))
return 1;
return -ENODEV;
}
static int tifm_uevent(struct device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
struct tifm_dev *fm_dev;
int i = 0;
int length = 0;
const char *card_type_name[] = {"INV", "SM", "MS", "SD"};
if (!dev || !(fm_dev = container_of(dev, struct tifm_dev, dev)))
return -ENODEV;
if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
"TIFM_CARD_TYPE=%s", card_type_name[fm_dev->media_id]))
return -ENOMEM;
return 0;
}
static struct bus_type tifm_bus_type = {
.name = "tifm",
.match = tifm_match,
.uevent = tifm_uevent,
};
static void tifm_free(struct class_device *cdev)
{
struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev);
kfree(fm->sockets);
if (fm->wq)
destroy_workqueue(fm->wq);
kfree(fm);
}
static struct class tifm_adapter_class = {
.name = "tifm_adapter",
.release = tifm_free
};
struct tifm_adapter *tifm_alloc_adapter(void)
{
struct tifm_adapter *fm;
fm = kzalloc(sizeof(struct tifm_adapter), GFP_KERNEL);
if (fm) {
fm->cdev.class = &tifm_adapter_class;
spin_lock_init(&fm->lock);
class_device_initialize(&fm->cdev);
}
return fm;
}
EXPORT_SYMBOL(tifm_alloc_adapter);
void tifm_free_adapter(struct tifm_adapter *fm)
{
class_device_put(&fm->cdev);
}
EXPORT_SYMBOL(tifm_free_adapter);
int tifm_add_adapter(struct tifm_adapter *fm)
{
int rc;
if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
return -ENOMEM;
spin_lock(&tifm_adapter_lock);
rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
spin_unlock(&tifm_adapter_lock);
if (!rc) {
snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
strncpy(fm->wq_name, fm->cdev.class_id, KOBJ_NAME_LEN);
fm->wq = create_singlethread_workqueue(fm->wq_name);
if (fm->wq)
return class_device_add(&fm->cdev);
spin_lock(&tifm_adapter_lock);
idr_remove(&tifm_adapter_idr, fm->id);
spin_unlock(&tifm_adapter_lock);
rc = -ENOMEM;
}
return rc;
}
EXPORT_SYMBOL(tifm_add_adapter);
void tifm_remove_adapter(struct tifm_adapter *fm)
{
class_device_del(&fm->cdev);
spin_lock(&tifm_adapter_lock);
idr_remove(&tifm_adapter_idr, fm->id);
spin_unlock(&tifm_adapter_lock);
}
EXPORT_SYMBOL(tifm_remove_adapter);
void tifm_free_device(struct device *dev)
{
struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
if (fm_dev->wq)
destroy_workqueue(fm_dev->wq);
kfree(fm_dev);
}
EXPORT_SYMBOL(tifm_free_device);
struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id)
{
struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
if (dev) {
spin_lock_init(&dev->lock);
snprintf(dev->wq_name, KOBJ_NAME_LEN, "tifm%u:%u", fm->id, id);
dev->wq = create_singlethread_workqueue(dev->wq_name);
if (!dev->wq) {
kfree(dev);
return 0;
}
dev->dev.parent = fm->dev;
dev->dev.bus = &tifm_bus_type;
dev->dev.release = tifm_free_device;