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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.c151
1 files changed, 89 insertions, 62 deletions
diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c
index 5ab81dd3785..d3e8ff46c23 100644
--- a/drivers/misc/tifm_7xx1.c
+++ b/drivers/misc/tifm_7xx1.c
@@ -11,6 +11,7 @@
#include <linux/tifm.h>
#include <linux/dma-mapping.h>
+#include <linux/freezer.h>
#define DRIVER_NAME "tifm_7xx1"
#define DRIVER_VERSION "0.7"
@@ -20,10 +21,8 @@ static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
unsigned long flags;
spin_lock_irqsave(&fm->lock, flags);
- if (!fm->inhibit_new_cards) {
- fm->socket_change_set |= 1 << sock->socket_id;
- queue_work(fm->wq, &fm->media_switcher);
- }
+ fm->socket_change_set |= 1 << sock->socket_id;
+ wake_up_all(&fm->change_set_notify);
spin_unlock_irqrestore(&fm->lock, flags);
}
@@ -59,14 +58,10 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
}
writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
- if (!fm->inhibit_new_cards) {
- if (!fm->socket_change_set) {
- writel(TIFM_IRQ_ENABLE,
- fm->addr + FM_SET_INTERRUPT_ENABLE);
- } else {
- queue_work(fm->wq, &fm->media_switcher);
- }
- }
+ 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;
@@ -123,21 +118,22 @@ tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
return base_addr + ((sock_num + 1) << 10);
}
-static void tifm_7xx1_switch_media(struct work_struct *work)
+static int tifm_7xx1_switch_media(void *data)
{
- struct tifm_adapter *fm =
- container_of(work, struct tifm_adapter, media_switcher);
+ struct tifm_adapter *fm = data;
unsigned long flags;
tifm_media_id media_id;
char *card_name = "xx";
- int cnt;
+ int cnt, rc;
struct tifm_dev *sock;
unsigned int socket_change_set;
- if (!class_device_get(&fm->cdev))
- return;
-
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;
@@ -145,12 +141,12 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
dev_dbg(fm->dev, "checking media set %x\n",
socket_change_set);
- if (fm->inhibit_new_cards)
+ if (kthread_should_stop())
socket_change_set = (1 << fm->num_sockets) - 1;
spin_unlock_irqrestore(&fm->lock, flags);
if (!socket_change_set)
- break;
+ continue;
spin_lock_irqsave(&fm->lock, flags);
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
@@ -169,7 +165,7 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
tifm_7xx1_sock_addr(fm->addr, cnt)
+ SOCK_CONTROL);
}
- if (fm->inhibit_new_cards)
+ if (kthread_should_stop())
continue;
spin_unlock_irqrestore(&fm->lock, flags);
@@ -218,7 +214,7 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
}
}
- if (!fm->inhibit_new_cards) {
+ if (!kthread_should_stop()) {
writel(TIFM_IRQ_FIFOMASK(socket_change_set)
| TIFM_IRQ_CARDMASK(socket_change_set),
fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
@@ -228,7 +224,6 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
writel(TIFM_IRQ_ENABLE,
fm->addr + FM_SET_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&fm->lock, flags);
- break;
} else {
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
if (fm->sockets[cnt])
@@ -236,56 +231,93 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
}
if (!fm->socket_change_set) {
spin_unlock_irqrestore(&fm->lock, flags);
- break;
+ return 0;
} else {
spin_unlock_irqrestore(&fm->lock, flags);
}
}
}
- class_device_put(&fm->cdev);
+ return 0;
}
+#ifdef CONFIG_PM
+
static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
{
- struct tifm_adapter *fm = pci_get_drvdata(dev);
- unsigned long flags;
+ dev_dbg(&dev->dev, "suspending host\n");
- spin_lock_irqsave(&fm->lock, flags);
- fm->inhibit_new_cards = 1;
- fm->socket_change_set = 0xf;
- writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
- spin_unlock_irqrestore(&fm->lock, flags);
- flush_workqueue(fm->wq);
-
- tifm_7xx1_switch_media(&fm->media_switcher);
-
- pci_set_power_state(dev, PCI_D3hot);
- pci_disable_device(dev);
- pci_save_state(dev);
+ 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);
- pci_enable_device(dev);
- pci_set_power_state(dev, PCI_D0);
- pci_set_master(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->inhibit_new_cards = 0;
- writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
- writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ 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);
- fm->socket_change_set = 0xf;
+ 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)
{
@@ -324,7 +356,6 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
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);
@@ -337,16 +368,15 @@ static int tifm_7xx1_probe(struct pci_dev *dev,
if (rc)
goto err_out_unmap;
- rc = tifm_add_adapter(fm);
+ 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);
-
- fm->socket_change_set = 0xf;
-
+ wake_up_process(fm->media_switcher);
return 0;
err_out_irq:
@@ -370,18 +400,15 @@ 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->inhibit_new_cards = 1;
- fm->socket_change_set = 0xf;
- writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
+ fm->socket_change_set = (1 << fm->num_sockets) - 1;
spin_unlock_irqrestore(&fm->lock, flags);
- flush_workqueue(fm->wq);
-
- tifm_7xx1_switch_media(&fm->media_switcher);
-
- writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
- free_irq(dev->irq, fm);
+ kthread_stop(fm->media_switcher);
tifm_remove_adapter(fm);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 20:48:38 +0000