mirror of https://gitee.com/openkylin/linux.git
465 lines
11 KiB
C
465 lines
11 KiB
C
/*
|
|
* 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>
|
|
#include <linux/freezer.h>
|
|
|
|
#define DRIVER_NAME "tifm_7xx1"
|
|
#define DRIVER_VERSION "0.7"
|
|
|
|
static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
fm->socket_change_set |= 1 << sock->socket_id;
|
|
wake_up_all(&fm->change_set_notify);
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
}
|
|
|
|
static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
|
|
{
|
|
struct tifm_adapter *fm = dev_id;
|
|
struct tifm_dev *sock;
|
|
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->num_sockets; cnt++) {
|
|
sock = fm->sockets[cnt];
|
|
sock_irq_status = (irq_status >> cnt)
|
|
& (TIFM_IRQ_FIFOMASK(1)
|
|
| TIFM_IRQ_CARDMASK(1));
|
|
|
|
if (sock && sock_irq_status)
|
|
sock->signal_irq(sock, sock_irq_status);
|
|
}
|
|
|
|
fm->socket_change_set |= irq_status
|
|
& ((1 << fm->num_sockets) - 1);
|
|
}
|
|
writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
|
|
|
|
if (!fm->socket_change_set)
|
|
writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
else
|
|
wake_up_all(&fm->change_set_notify);
|
|
|
|
spin_unlock(&fm->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *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 __iomem *
|
|
tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
|
|
{
|
|
return base_addr + ((sock_num + 1) << 10);
|
|
}
|
|
|
|
static int tifm_7xx1_switch_media(void *data)
|
|
{
|
|
struct tifm_adapter *fm = data;
|
|
unsigned long flags;
|
|
tifm_media_id media_id;
|
|
char *card_name = "xx";
|
|
int cnt, rc;
|
|
struct tifm_dev *sock;
|
|
unsigned int socket_change_set;
|
|
|
|
while (1) {
|
|
rc = wait_event_interruptible(fm->change_set_notify,
|
|
fm->socket_change_set);
|
|
if (rc == -ERESTARTSYS)
|
|
try_to_freeze();
|
|
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
socket_change_set = fm->socket_change_set;
|
|
fm->socket_change_set = 0;
|
|
|
|
dev_dbg(fm->dev, "checking media set %x\n",
|
|
socket_change_set);
|
|
|
|
if (kthread_should_stop())
|
|
socket_change_set = (1 << fm->num_sockets) - 1;
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
|
|
if (!socket_change_set)
|
|
continue;
|
|
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
|
|
if (!(socket_change_set & (1 << cnt)))
|
|
continue;
|
|
sock = fm->sockets[cnt];
|
|
if (sock) {
|
|
printk(KERN_INFO DRIVER_NAME
|
|
": demand removing card from socket %d\n",
|
|
cnt);
|
|
fm->sockets[cnt] = NULL;
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
device_unregister(&sock->dev);
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
writel(0x0e00,
|
|
tifm_7xx1_sock_addr(fm->addr, cnt)
|
|
+ SOCK_CONTROL);
|
|
}
|
|
if (kthread_should_stop())
|
|
continue;
|
|
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
media_id = tifm_7xx1_toggle_sock_power(
|
|
tifm_7xx1_sock_addr(fm->addr, cnt),
|
|
fm->num_sockets == 2);
|
|
if (media_id) {
|
|
sock = tifm_alloc_device(fm);
|
|
if (sock) {
|
|
sock->addr = tifm_7xx1_sock_addr(fm->addr,
|
|
cnt);
|
|
sock->media_id = media_id;
|
|
sock->socket_id = cnt;
|
|
switch (media_id) {
|
|
case 1:
|
|
card_name = "xd";
|
|
break;
|
|
case 2:
|
|
card_name = "ms";
|
|
break;
|
|
case 3:
|
|
card_name = "sd";
|
|
break;
|
|
default:
|
|
tifm_free_device(&sock->dev);
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
continue;
|
|
}
|
|
snprintf(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);
|
|
if (!device_register(&sock->dev)) {
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
if (!fm->sockets[cnt]) {
|
|
fm->sockets[cnt] = sock;
|
|
sock = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
}
|
|
if (sock)
|
|
tifm_free_device(&sock->dev);
|
|
}
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
}
|
|
}
|
|
|
|
if (!kthread_should_stop()) {
|
|
writel(TIFM_IRQ_FIFOMASK(socket_change_set)
|
|
| TIFM_IRQ_CARDMASK(socket_change_set),
|
|
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
|
|
writel(TIFM_IRQ_FIFOMASK(socket_change_set)
|
|
| TIFM_IRQ_CARDMASK(socket_change_set),
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
writel(TIFM_IRQ_ENABLE,
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
} else {
|
|
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
|
|
if (fm->sockets[cnt])
|
|
fm->socket_change_set |= 1 << cnt;
|
|
}
|
|
if (!fm->socket_change_set) {
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
return 0;
|
|
} else {
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
|
|
{
|
|
dev_dbg(&dev->dev, "suspending host\n");
|
|
|
|
pci_save_state(dev);
|
|
pci_enable_wake(dev, pci_choose_state(dev, state), 0);
|
|
pci_disable_device(dev);
|
|
pci_set_power_state(dev, pci_choose_state(dev, state));
|
|
return 0;
|
|
}
|
|
|
|
static int tifm_7xx1_resume(struct pci_dev *dev)
|
|
{
|
|
struct tifm_adapter *fm = pci_get_drvdata(dev);
|
|
int cnt, rc;
|
|
unsigned long flags;
|
|
tifm_media_id new_ids[fm->num_sockets];
|
|
|
|
pci_set_power_state(dev, PCI_D0);
|
|
pci_restore_state(dev);
|
|
rc = pci_enable_device(dev);
|
|
if (rc)
|
|
return rc;
|
|
pci_set_master(dev);
|
|
|
|
dev_dbg(&dev->dev, "resuming host\n");
|
|
|
|
for (cnt = 0; cnt < fm->num_sockets; cnt++)
|
|
new_ids[cnt] = tifm_7xx1_toggle_sock_power(
|
|
tifm_7xx1_sock_addr(fm->addr, cnt),
|
|
fm->num_sockets == 2);
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
fm->socket_change_set = 0;
|
|
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
|
|
if (fm->sockets[cnt]) {
|
|
if (fm->sockets[cnt]->media_id == new_ids[cnt])
|
|
fm->socket_change_set |= 1 << cnt;
|
|
|
|
fm->sockets[cnt]->media_id = new_ids[cnt];
|
|
}
|
|
}
|
|
|
|
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
if (!fm->socket_change_set) {
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
return 0;
|
|
} else {
|
|
fm->socket_change_set = 0;
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
}
|
|
|
|
wait_event_timeout(fm->change_set_notify, fm->socket_change_set, HZ);
|
|
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
|
|
| TIFM_IRQ_CARDMASK(fm->socket_change_set),
|
|
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
|
|
writel(TIFM_IRQ_FIFOMASK(fm->socket_change_set)
|
|
| TIFM_IRQ_CARDMASK(fm->socket_change_set),
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
writel(TIFM_IRQ_ENABLE,
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
fm->socket_change_set = 0;
|
|
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define tifm_7xx1_suspend NULL
|
|
#define tifm_7xx1_resume NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
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->num_sockets = (dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM)
|
|
? 4 : 2;
|
|
fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->num_sockets,
|
|
GFP_KERNEL);
|
|
if (!fm->sockets)
|
|
goto err_out_free;
|
|
|
|
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, IRQF_SHARED, DRIVER_NAME, fm);
|
|
if (rc)
|
|
goto err_out_unmap;
|
|
|
|
init_waitqueue_head(&fm->change_set_notify);
|
|
rc = tifm_add_adapter(fm, tifm_7xx1_switch_media);
|
|
if (rc)
|
|
goto err_out_irq;
|
|
|
|
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
|
|
writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
|
|
fm->addr + FM_SET_INTERRUPT_ENABLE);
|
|
wake_up_process(fm->media_switcher);
|
|
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;
|
|
|
|
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
|
|
mmiowb();
|
|
free_irq(dev->irq, fm);
|
|
|
|
spin_lock_irqsave(&fm->lock, flags);
|
|
fm->socket_change_set = (1 << fm->num_sockets) - 1;
|
|
spin_unlock_irqrestore(&fm->lock, flags);
|
|
|
|
kthread_stop(fm->media_switcher);
|
|
|
|
tifm_remove_adapter(fm);
|
|
|
|
pci_set_drvdata(dev, NULL);
|
|
|
|
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, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
|
|
PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
|
|
{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
|
|
PCI_ANY_ID, 0, 0, 0 },
|
|
{ PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
|
|
PCI_ANY_ID, 0, 0, 0 },
|
|
{ }
|
|
};
|
|
|
|
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);
|