[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback

Unify the EVENT_CARD_INSERTION and "attach" callbacks to one unified
probe() callback. As all in-kernel drivers are changed to this new
callback, there will be no temporary backwards-compatibility. Inside a
probe() function, each driver _must_ set struct pcmcia_device
*p_dev->instance and instance->handle correctly.

With these patches, the basic driver interface for 16-bit PCMCIA drivers
now has the classic four callbacks known also from other buses:

        int (*probe)            (struct pcmcia_device *dev);
        void (*remove)          (struct pcmcia_device *dev);

        int (*suspend)          (struct pcmcia_device *dev);
        int (*resume)           (struct pcmcia_device *dev);

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

3 files changed, 30 insertions, 154 deletions

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 8a064f2..649677b 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -66,7 +66,6 @@ static char *version = "cm4000_cs.c v2.4.0gm5 - All bugs added by Harald Welte";
 #define	T_100MSEC	msecs_to_jiffies(100)
 #define	T_500MSEC	msecs_to_jiffies(500)
 
-static void cm4000_detach(struct pcmcia_device *p_dev);
 static void cm4000_release(dev_link_t *link);
 
 static int major;		/* major number we get from the kernel */
@@ -156,7 +155,6 @@ struct cm4000_dev {
 		/*sbuf*/ 512*sizeof(char) - 			\
 		/*queue*/ 4*sizeof(wait_queue_head_t))
 
-static dev_info_t dev_info = MODULE_NAME;
 static dev_link_t *dev_table[CM4000_MAX_DEV];
 
 /* This table doesn't use spaces after the comma between fields and thus
@@ -1864,38 +1862,6 @@ cs_release:
 	link->state &= ~DEV_CONFIG_PENDING;
 }
 
-static int cm4000_event(event_t event, int priority,
-			event_callback_args_t *args)
-{
-	dev_link_t *link;
-	struct cm4000_dev *dev;
-	int devno;
-
-	link = args->client_data;
-	dev = link->priv;
-
-	DEBUGP(3, dev, "-> cm4000_event\n");
-	for (devno = 0; devno < CM4000_MAX_DEV; devno++)
-		if (dev_table[devno] == link)
-			break;
-
-	if (devno == CM4000_MAX_DEV)
-		return CS_BAD_ADAPTER;
-
-	switch (event) {
-	case CS_EVENT_CARD_INSERTION:
-		DEBUGP(5, dev, "CS_EVENT_CARD_INSERTION\n");
-		link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
-		cm4000_config(link, devno);
-		break;
-	default:
-		DEBUGP(5, dev, "unknown event %.2x\n", event);
-		break;
-	}
-	DEBUGP(3, dev, "<- cm4000_event\n");
-	return CS_SUCCESS;
-}
-
 static int cm4000_suspend(struct pcmcia_device *p_dev)
 {
 	dev_link_t *link = dev_to_instance(p_dev);
@@ -1935,11 +1901,10 @@ static void cm4000_release(dev_link_t *link)
 	pcmcia_release_io(link->handle, &link->io);
 }
 
-static dev_link_t *cm4000_attach(void)
+static int cm4000_attach(struct pcmcia_device *p_dev)
 {
 	struct cm4000_dev *dev;
 	dev_link_t *link;
-	client_reg_t client_reg;
 	int i;
 
 	for (i = 0; i < CM4000_MAX_DEV; i++)
@@ -1948,41 +1913,31 @@ static dev_link_t *cm4000_attach(void)
 
 	if (i == CM4000_MAX_DEV) {
 		printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
-		return NULL;
+		return -ENODEV;
 	}
 
 	/* create a new cm4000_cs device */
 	dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
 	if (dev == NULL)
-		return NULL;
+		return -ENOMEM;
 
 	link = &dev->link;
 	link->priv = dev;
 	link->conf.IntType = INT_MEMORY_AND_IO;
 	dev_table[i] = link;
 
-	/* register with card services */
-	client_reg.dev_info = &dev_info;
-	client_reg.EventMask =
-	    CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
-	    CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
-	    CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
-	client_reg.Version = 0x0210;
-	client_reg.event_callback_args.client_data = link;
-
-	i = pcmcia_register_client(&link->handle, &client_reg);
-	if (i) {
-		cs_error(link->handle, RegisterClient, i);
-		cm4000_detach(link->handle);
-		return NULL;
-	}
-
 	init_waitqueue_head(&dev->devq);
 	init_waitqueue_head(&dev->ioq);
 	init_waitqueue_head(&dev->atrq);
 	init_waitqueue_head(&dev->readq);
 
-	return link;
+	link->handle = p_dev;
+	p_dev->instance = link;
+
+	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+	cm4000_config(link, i);
+
+	return 0;
 }
 
 static void cm4000_detach(struct pcmcia_device *p_dev)
@@ -2031,11 +1986,10 @@ static struct pcmcia_driver cm4000_driver = {
 	.drv	  = {
 		.name = "cm4000_cs",
 		},
-	.attach   = cm4000_attach,
+	.probe    = cm4000_attach,
 	.remove   = cm4000_detach,
 	.suspend  = cm4000_suspend,
 	.resume   = cm4000_resume,
-	.event	  = cm4000_event,
 	.id_table = cm4000_ids,
 };
 
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index e08ab94..46eb371 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -65,7 +65,6 @@ static char *version =
 #define POLL_PERIOD 				msecs_to_jiffies(10)
 
 static void reader_release(dev_link_t *link);
-static void reader_detach(struct pcmcia_device *p_dev);
 
 static int major;
 
@@ -86,7 +85,6 @@ struct reader_dev {
 	struct timer_list 	poll_timer;
 };
 
-static dev_info_t dev_info = MODULE_NAME;
 static dev_link_t *dev_table[CM_MAX_DEV];
 
 #ifndef PCMCIA_DEBUG
@@ -629,39 +627,6 @@ cs_release:
 	link->state &= ~DEV_CONFIG_PENDING;
 }
 
-static int reader_event(event_t event, int priority,
-			event_callback_args_t *args)
-{
-	dev_link_t *link;
-	struct reader_dev *dev;
-	int devno;
-
-	link = args->client_data;
-	dev = link->priv;
-	DEBUGP(3, dev, "-> reader_event\n");
-	for (devno = 0; devno < CM_MAX_DEV; devno++) {
-		if (dev_table[devno] == link)
-			break;
-	}
-	if (devno == CM_MAX_DEV)
-		return CS_BAD_ADAPTER;
-
-	switch (event) {
-		case CS_EVENT_CARD_INSERTION:
-			DEBUGP(5, dev, "CS_EVENT_CARD_INSERTION\n");
-			link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
-			reader_config(link, devno);
-			break;
-
-		default:
-			DEBUGP(5, dev, "reader_event: unknown event %.2x\n",
-			       event);
-			break;
-	}
-	DEBUGP(3, dev, "<- reader_event\n");
-	return CS_SUCCESS;
-}
-
 static int reader_suspend(struct pcmcia_device *p_dev)
 {
 	dev_link_t *link = dev_to_instance(p_dev);
@@ -691,11 +656,10 @@ static void reader_release(dev_link_t *link)
 	pcmcia_release_io(link->handle, &link->io);
 }
 
-static dev_link_t *reader_attach(void)
+static int reader_attach(struct pcmcia_device *p_dev)
 {
 	struct reader_dev *dev;
 	dev_link_t *link;
-	client_reg_t client_reg;
 	int i;
 
 	for (i = 0; i < CM_MAX_DEV; i++) {
@@ -704,11 +668,11 @@ static dev_link_t *reader_attach(void)
 	}
 
 	if (i == CM_MAX_DEV)
-		return NULL;
+		return -ENODEV;
 
 	dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
 	if (dev == NULL)
-		return NULL;
+		return -ENOMEM;
 
 	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
 	dev->buffer_status = 0;
@@ -719,20 +683,6 @@ static dev_link_t *reader_attach(void)
 	link->conf.IntType = INT_MEMORY_AND_IO;
 	dev_table[i] = link;
 
-	client_reg.dev_info = &dev_info;
-	client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
-	client_reg.EventMask=
-		CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
-		CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
-		CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
-	client_reg.Version = 0x0210;
-	client_reg.event_callback_args.client_data = link;
-	i = pcmcia_register_client(&link->handle, &client_reg);
-	if (i) {
-		cs_error(link->handle, RegisterClient, i);
-		reader_detach(link->handle);
-		return NULL;
-	}
 	init_waitqueue_head(&dev->devq);
 	init_waitqueue_head(&dev->poll_wait);
 	init_waitqueue_head(&dev->read_wait);
@@ -740,7 +690,13 @@ static dev_link_t *reader_attach(void)
 	init_timer(&dev->poll_timer);
 	dev->poll_timer.function = &cm4040_do_poll;
 
-	return link;
+	link->handle = p_dev;
+	p_dev->instance = link;
+
+	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+	reader_config(link, i);
+
+	return 0;
 }
 
 static void reader_detach(struct pcmcia_device *p_dev)
@@ -790,11 +746,10 @@ static struct pcmcia_driver reader_driver = {
   	.drv		= {
 		.name	= "cm4040_cs",
 	},
-	.attach		= reader_attach,
+	.probe		= reader_attach,
 	.remove		= reader_detach,
 	.suspend	= reader_suspend,
 	.resume		= reader_resume,
-	.event		= reader_event,
 	.id_table	= cm4040_ids,
 };
 
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index dc38b1d..cf45b10 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -486,13 +486,8 @@ static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
 
 static void mgslpc_config(dev_link_t *link);
 static void mgslpc_release(u_long arg);
-static int  mgslpc_event(event_t event, int priority,
-			 event_callback_args_t *args);
-static dev_link_t *mgslpc_attach(void);
 static void mgslpc_detach(struct pcmcia_device *p_dev);
 
-static dev_info_t dev_info = "synclink_cs";
-
 /*
  * 1st function defined in .text section. Calling this function in
  * init_module() followed by a breakpoint allows a remote debugger
@@ -538,12 +533,10 @@ static void ldisc_receive_buf(struct tty_struct *tty,
 	}
 }
 
-static dev_link_t *mgslpc_attach(void)
+static int mgslpc_attach(struct pcmcia_device *p_dev)
 {
     MGSLPC_INFO *info;
     dev_link_t *link;
-    client_reg_t client_reg;
-    int ret;
     
     if (debug_level >= DEBUG_LEVEL_INFO)
 	    printk("mgslpc_attach\n");
@@ -551,7 +544,7 @@ static dev_link_t *mgslpc_attach(void)
     info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
     if (!info) {
 	    printk("Error can't allocate device instance data\n");
-	    return NULL;
+	    return -ENOMEM;
     }
 
     memset(info, 0, sizeof(MGSLPC_INFO));
@@ -586,23 +579,15 @@ static dev_link_t *mgslpc_attach(void)
     link->conf.Vcc = 50;
     link->conf.IntType = INT_MEMORY_AND_IO;
 
-    /* Register with Card Services */
-    link->next = NULL;
-
-    client_reg.dev_info = &dev_info;
-    client_reg.Version = 0x0210;
-    client_reg.event_callback_args.client_data = link;
+    link->handle = p_dev;
+    p_dev->instance = link;
 
-    ret = pcmcia_register_client(&link->handle, &client_reg);
-    if (ret != CS_SUCCESS) {
-	    cs_error(link->handle, RegisterClient, ret);
-	    mgslpc_detach(link->handle);
-	    return NULL;
-    }
+    link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+    mgslpc_config(link);
 
     mgslpc_add_device(info);
 
-    return link;
+    return 0;
 }
 
 /* Card has been inserted.
@@ -778,23 +763,6 @@ static int mgslpc_resume(struct pcmcia_device *dev)
 }
 
 
-static int mgslpc_event(event_t event, int priority,
-			event_callback_args_t *args)
-{
-    dev_link_t *link = args->client_data;
-    
-    if (debug_level >= DEBUG_LEVEL_INFO)
-	    printk("mgslpc_event(0x%06x)\n", event);
-    
-    switch (event) {
-    case CS_EVENT_CARD_INSERTION:
-	    link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
-	    mgslpc_config(link);
-	    break;
-    }
-    return 0;
-}
-
 static inline int mgslpc_paranoia_check(MGSLPC_INFO *info,
 					char *name, const char *routine)
 {
@@ -3071,8 +3039,7 @@ static struct pcmcia_driver mgslpc_driver = {
 	.drv		= {
 		.name	= "synclink_cs",
 	},
-	.attach		= mgslpc_attach,
-	.event		= mgslpc_event,
+	.probe		= mgslpc_attach,
 	.remove		= mgslpc_detach,
 	.id_table	= mgslpc_ids,
 	.suspend	= mgslpc_suspend,