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path: root/drivers/misc/tifm_7xx1.c
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Diffstat (limited to 'drivers/misc/tifm_7xx1.c')
-rw-r--r--drivers/misc/tifm_7xx1.c332
1 files changed, 141 insertions, 191 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index bc60e2fc3c2c..1ba6c085419a 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -11,10 +11,20 @@
#include <linux/tifm.h>
#include <linux/dma-mapping.h>
-#include <linux/freezer.h>
#define DRIVER_NAME "tifm_7xx1"
-#define DRIVER_VERSION "0.7"
+#define DRIVER_VERSION "0.8"
+
+#define TIFM_IRQ_ENABLE 0x80000000
+#define TIFM_IRQ_SOCKMASK(x) (x)
+#define TIFM_IRQ_CARDMASK(x) ((x) << 8)
+#define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
+#define TIFM_IRQ_SETALL 0xffffffff
+
+static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
+ struct tifm_dev *sock)
+{
+}
static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
{
@@ -22,7 +32,7 @@ static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
spin_lock_irqsave(&fm->lock, flags);
fm->socket_change_set |= 1 << sock->socket_id;
- wake_up_all(&fm->change_set_notify);
+ tifm_queue_work(&fm->media_switcher);
spin_unlock_irqrestore(&fm->lock, flags);
}
@@ -30,8 +40,7 @@ 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;
+ unsigned int irq_status, cnt;
spin_lock(&fm->lock);
irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
@@ -45,12 +54,12 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
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);
+ if (sock) {
+ if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
+ sock->data_event(sock);
+ if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
+ sock->card_event(sock);
+ }
}
fm->socket_change_set |= irq_status
@@ -58,57 +67,57 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
}
writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
- if (!fm->socket_change_set)
+ if (fm->finish_me)
+ complete_all(fm->finish_me);
+ else if (!fm->socket_change_set)
writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
else
- wake_up_all(&fm->change_set_notify);
+ tifm_queue_work(&fm->media_switcher);
spin_unlock(&fm->lock);
return IRQ_HANDLED;
}
-static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
- int is_x2)
+static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
{
unsigned int s_state;
int cnt;
writel(0x0e00, sock_addr + SOCK_CONTROL);
- for (cnt = 0; cnt < 100; cnt++) {
+ for (cnt = 16; cnt <= 256; cnt <<= 1) {
if (!(TIFM_SOCK_STATE_POWERED
& readl(sock_addr + SOCK_PRESENT_STATE)))
break;
- msleep(10);
+
+ msleep(cnt);
}
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);
- }
+ return 0;
- for (cnt = 0; cnt < 100; cnt++) {
+ writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
+ sock_addr + SOCK_CONTROL);
+
+ /* xd needs some extra time before power on */
+ if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
+ == TIFM_TYPE_XD)
+ msleep(40);
+
+ writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
+ /* wait for power to stabilize */
+ msleep(20);
+ for (cnt = 16; cnt <= 256; cnt <<= 1) {
if ((TIFM_SOCK_STATE_POWERED
& readl(sock_addr + SOCK_PRESENT_STATE)))
break;
- msleep(10);
+
+ msleep(cnt);
}
- if (!is_x2)
- writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
- sock_addr + SOCK_CONTROL);
+ writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
+ sock_addr + SOCK_CONTROL);
return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
}
@@ -119,127 +128,77 @@ 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)
+static void tifm_7xx1_switch_media(struct work_struct *work)
{
- struct tifm_adapter *fm = data;
- unsigned long flags;
- tifm_media_id media_id;
- char *card_name = "xx";
- int cnt, rc;
+ struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
+ media_switcher);
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();
+ unsigned long flags;
+ unsigned char media_id;
+ unsigned int socket_change_set, cnt;
- spin_lock_irqsave(&fm->lock, flags);
- socket_change_set = fm->socket_change_set;
- fm->socket_change_set = 0;
+ 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);
+ dev_dbg(fm->cdev.dev, "checking media set %x\n",
+ socket_change_set);
- if (kthread_should_stop())
- socket_change_set = (1 << fm->num_sockets) - 1;
+ if (!socket_change_set) {
spin_unlock_irqrestore(&fm->lock, flags);
+ return;
+ }
- if (!socket_change_set)
+ for (cnt = 0; cnt < fm->num_sockets; cnt++) {
+ if (!(socket_change_set & (1 << cnt)))
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;
-
+ sock = fm->sockets[cnt];
+ if (sock) {
+ printk(KERN_INFO
+ "%s : demand removing card from socket %u:%u\n",
+ fm->cdev.class_id, fm->id, cnt);
+ fm->sockets[cnt] = NULL;
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);
- }
+ 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()) {
- 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);
+
+ media_id = tifm_7xx1_toggle_sock_power(
+ tifm_7xx1_sock_addr(fm->addr, cnt));
+
+ // tifm_alloc_device will check if media_id is valid
+ sock = tifm_alloc_device(fm, cnt, media_id);
+ if (sock) {
+ sock->addr = tifm_7xx1_sock_addr(fm->addr, 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);
}
- return 0;
+
+ 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);
}
#ifdef CONFIG_PM
@@ -258,9 +217,11 @@ static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
static int tifm_7xx1_resume(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
- int cnt, rc;
+ int rc;
+ unsigned int good_sockets = 0, bad_sockets = 0;
unsigned long flags;
- tifm_media_id new_ids[fm->num_sockets];
+ unsigned char new_ids[fm->num_sockets];
+ DECLARE_COMPLETION_ONSTACK(finish_resume);
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
@@ -271,45 +232,49 @@ static int tifm_7xx1_resume(struct pci_dev *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);
+ for (rc = 0; rc < fm->num_sockets; rc++)
+ new_ids[rc] = tifm_7xx1_toggle_sock_power(
+ tifm_7xx1_sock_addr(fm->addr, rc));
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];
+ for (rc = 0; rc < fm->num_sockets; rc++) {
+ if (fm->sockets[rc]) {
+ if (fm->sockets[rc]->type == new_ids[rc])
+ good_sockets |= 1 << rc;
+ else
+ bad_sockets |= 1 << rc;
}
}
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;
+ dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
+ good_sockets, bad_sockets);
+
+ fm->socket_change_set = 0;
+ if (good_sockets) {
+ fm->finish_me = &finish_resume;
spin_unlock_irqrestore(&fm->lock, flags);
+ rc = wait_for_completion_timeout(&finish_resume, HZ);
+ dev_dbg(&dev->dev, "wait returned %d\n", rc);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ writel(TIFM_IRQ_FIFOMASK(good_sockets)
+ | TIFM_IRQ_CARDMASK(good_sockets),
+ fm->addr + FM_SET_INTERRUPT_ENABLE);
+ spin_lock_irqsave(&fm->lock, flags);
+ fm->finish_me = NULL;
+ fm->socket_change_set ^= good_sockets & fm->socket_change_set;
}
- wait_event_timeout(fm->change_set_notify, fm->socket_change_set, HZ);
+ fm->socket_change_set |= bad_sockets;
+ if (fm->socket_change_set)
+ tifm_queue_work(&fm->media_switcher);
- 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);
+ spin_unlock_irqrestore(&fm->lock, flags);
writel(TIFM_IRQ_ENABLE,
fm->addr + FM_SET_INTERRUPT_ENABLE);
- fm->socket_change_set = 0;
- spin_unlock_irqrestore(&fm->lock, flags);
return 0;
}
@@ -345,20 +310,14 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
pci_intx(dev, 1);
- fm = tifm_alloc_adapter();
+ fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
+ ? 4 : 2, &dev->dev);
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;
-
+ INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
fm->eject = tifm_7xx1_eject;
pci_set_drvdata(dev, fm);
@@ -367,19 +326,16 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
if (!fm->addr)
goto err_out_free;
- rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
+ rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, 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);
+ 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_SOCKMASK((1 << fm->num_sockets) - 1),
fm->addr + FM_SET_INTERRUPT_ENABLE);
- wake_up_process(fm->media_switcher);
return 0;
err_out_irq:
@@ -401,18 +357,12 @@ err_out:
static void tifm_7xx1_remove(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
- unsigned long flags;
+ fm->eject = tifm_7xx1_dummy_eject;
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);