tifm: simplify bus match and uevent handlers

Remove code duplicating the kernel functionality and clean up data
structures involved in driver matching.
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/misc/tifm_7xx1.c

@@ -73,7 +73,7 @@ static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
+static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
 						 int is_x2)
 {
 	unsigned int s_state;
@@ -90,7 +90,7 @@ static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr,
 
 	s_state = readl(sock_addr + SOCK_PRESENT_STATE);
 	if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
-		return FM_NULL;
+		return 0;
 
 	if (is_x2) {
 		writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
@@ -129,7 +129,7 @@ static int tifm_7xx1_switch_media(void *data)
 {
 	struct tifm_adapter *fm = data;
 	unsigned long flags;
-	tifm_media_id media_id;
+	unsigned char media_id;
 	char *card_name = "xx";
 	int cnt, rc;
 	struct tifm_dev *sock;
@@ -184,7 +184,7 @@ static int tifm_7xx1_switch_media(void *data)
 				if (sock) {
 					sock->addr = tifm_7xx1_sock_addr(fm->addr,
 									 cnt);
-					sock->media_id = media_id;
+					sock->type = media_id;
 					sock->socket_id = cnt;
 					switch (media_id) {
 					case 1:
@@ -266,7 +266,7 @@ 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];
+	unsigned char new_ids[fm->num_sockets];
 
 	pci_set_power_state(dev, PCI_D0);
 	pci_restore_state(dev);
@@ -285,10 +285,10 @@ static int tifm_7xx1_resume(struct pci_dev *dev)
 	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])
+			if (fm->sockets[cnt]->type == new_ids[cnt])
 				fm->socket_change_set |= 1 << cnt;
 
-			fm->sockets[cnt]->media_id = new_ids[cnt];
+			fm->sockets[cnt]->type = new_ids[cnt];
 		}
 	}
 

drivers/misc/tifm_core.c

@@ -19,42 +19,53 @@
 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)
+static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
 {
-	while (*ids) {
-		if (dev->media_id == *ids)
-			return ids;
-		ids++;
-	}
-	return NULL;
+	const char *card_type_name[3][3] = {
+		{ "SmartMedia/xD", "MemoryStick", "MMC/SD" },
+		{ "XD", "MS", "SD"},
+		{ "xd", "ms", "sd"}
+	};
+
+	if (nt > 2 || type < 1 || type > 3)
+		return NULL;
+	return card_type_name[nt][type - 1];
 }
 
-static int tifm_match(struct device *dev, struct device_driver *drv)
+static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
 {
-	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))
+	if (sock->type == id->type)
 		return 1;
-	return -ENODEV;
+	return 0;
+}
+
+static int tifm_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
+	struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
+						  driver);
+	struct tifm_device_id *ids = fm_drv->id_table;
+
+	if (ids) {
+		while (ids->type) {
+			if (tifm_dev_match(sock, ids))
+				return 1;
+			++ids;
+		}
+	}
+	return 0;
 }
 
 static int tifm_uevent(struct device *dev, char **envp, int num_envp,
 		       char *buffer, int buffer_size)
 {
-	struct tifm_dev *fm_dev;
+	struct tifm_dev *sock = container_of(dev, struct tifm_dev, 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]))
+			   "TIFM_CARD_TYPE=%s",
+			   tifm_media_type_name(sock->type, 1)))
 		return -ENOMEM;
 
 	return 0;
@@ -132,7 +143,7 @@ static int tifm_device_resume(struct device *dev)
 
 static struct bus_type tifm_bus_type = {
 	.name    = "tifm",
-	.match   = tifm_match,
+	.match   = tifm_bus_match,
 	.uevent  = tifm_uevent,
 	.probe   = tifm_device_probe,
 	.remove  = tifm_device_remove,

drivers/mmc/tifm_sd.c

@@ -948,7 +948,7 @@ static int tifm_sd_resume(struct tifm_dev *sock)
 	struct mmc_host *mmc = tifm_get_drvdata(sock);
 	struct tifm_sd *host = mmc_priv(mmc);
 
-	if (sock->media_id != FM_SD
+	if (sock->type != TIFM_TYPE_SD
 	    || tifm_sd_initialize_host(host)) {
 		tifm_eject(sock);
 		return 0;
@@ -964,8 +964,8 @@ static int tifm_sd_resume(struct tifm_dev *sock)
 
 #endif /* CONFIG_PM */
 
-static tifm_media_id tifm_sd_id_tbl[] = {
-	FM_SD, 0
+static struct tifm_device_id tifm_sd_id_tbl[] = {
+	{ TIFM_TYPE_SD }, { }
 };
 
 static struct tifm_driver tifm_sd_driver = {

include/linux/tifm.h

@@ -74,13 +74,19 @@ enum {
 #define TIFM_DMA_TX               0x00008000 /* Meaning of this constant is unverified */
 #define TIFM_DMA_EN               0x00000001 /* Meaning of this constant is unverified */
 
-typedef enum {FM_NULL = 0, FM_XD = 0x01, FM_MS = 0x02, FM_SD = 0x03} tifm_media_id;
+#define TIFM_TYPE_XD 1
+#define TIFM_TYPE_MS 2
+#define TIFM_TYPE_SD 3
+
+struct tifm_device_id {
+	unsigned char type;
+};
 
 struct tifm_driver;
 struct tifm_dev {
 	char __iomem            *addr;
 	spinlock_t              lock;
-	tifm_media_id           media_id;
+	unsigned char           type;
 	unsigned int            socket_id;
 
 	void          (*card_event)(struct tifm_dev *sock);
@@ -90,7 +96,7 @@ struct tifm_dev {
 };
 
 struct tifm_driver {
-	tifm_media_id        *id_table;
+	struct tifm_device_id *id_table;
 	int                  (*probe)(struct tifm_dev *dev);
 	void                 (*remove)(struct tifm_dev *dev);
 	int                  (*suspend)(struct tifm_dev *dev,
@@ -141,8 +147,4 @@ static inline void tifm_set_drvdata(struct tifm_dev *dev, void *data)
 	dev_set_drvdata(&dev->dev, data);
 }
 
-struct tifm_device_id {
-	tifm_media_id media_id;
-};
-
 #endif