V4L/DVB (7077): bt878: remove handcrafted PCI subsystem ID check

This patch moves the subsystem ID and subsystem vendor ID check from probing
function to the PCI generic function by describing subsystem IDs in
pci_device_id table. This enables to add new PCI IDs to a device driver pci_ids
table at runtime by new_id file in sysfs pci driver tree.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/dvb/bt8xx.txt

@@ -78,6 +78,18 @@ Example:
 For a full list of card ID's please see Documentation/video4linux/CARDLIST.bttv.
 In case of further problems please subscribe and send questions to the mailing list: linux-dvb@linuxtv.org.
 
+2c) Probing the cards with broken PCI subsystem ID
+--------------------------------------------------
+There are some TwinHan cards that the EEPROM has become corrupted for some
+reason. The cards do not have correct PCI subsystem ID. But we can force
+probing the cards with broken PCI subsystem ID
+
+	$ echo 109e 0878 $subvendor $subdevice > \
+		/sys/bus/pci/drivers/bt878/new_id
+
+109e: PCI_VENDOR_ID_BROOKTREE
+0878: PCI_DEVICE_ID_BROOKTREE_878
+
 Authors: Richard Walker,
 	 Jamie Honan,
 	 Michael Hunold,

drivers/media/dvb/bt8xx/bt878.c

@@ -378,23 +378,37 @@ bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *
 
 EXPORT_SYMBOL(bt878_device_control);
 
+#define BROOKTREE_878_DEVICE(vend, dev, name) \
+	{ \
+		.vendor = PCI_VENDOR_ID_BROOKTREE, \
+		.device = PCI_DEVICE_ID_BROOKTREE_878, \
+		.subvendor = (vend), .subdevice = (dev), \
+		.driver_data = (unsigned long) name \
+	}
 
-static struct cards card_list[] __devinitdata = {
-
-	{ 0x01010071, BTTV_BOARD_NEBULA_DIGITV,			"Nebula Electronics DigiTV" },
-	{ 0x07611461, BTTV_BOARD_AVDVBT_761,			"AverMedia AverTV DVB-T 761" },
-	{ 0x001c11bd, BTTV_BOARD_PINNACLESAT,			"Pinnacle PCTV Sat" },
-	{ 0x002611bd, BTTV_BOARD_TWINHAN_DST,			"Pinnacle PCTV SAT CI" },
-	{ 0x00011822, BTTV_BOARD_TWINHAN_DST,			"Twinhan VisionPlus DVB" },
-	{ 0xfc00270f, BTTV_BOARD_TWINHAN_DST,			"ChainTech digitop DST-1000 DVB-S" },
-	{ 0x07711461, BTTV_BOARD_AVDVBT_771,			"AVermedia AverTV DVB-T 771" },
-	{ 0xdb1018ac, BTTV_BOARD_DVICO_DVBT_LITE,		"DViCO FusionHDTV DVB-T Lite" },
-	{ 0xdb1118ac, BTTV_BOARD_DVICO_DVBT_LITE,		"Ultraview DVB-T Lite" },
-	{ 0xd50018ac, BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE,	"DViCO FusionHDTV 5 Lite" },
-	{ 0x20007063, BTTV_BOARD_PC_HDTV,			"pcHDTV HD-2000 TV" },
-	{ 0x00261822, BTTV_BOARD_TWINHAN_DST,			"DNTV Live! Mini" }
+static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
+	BROOKTREE_878_DEVICE(0x0071, 0x0101, "Nebula Electronics DigiTV"),
+	BROOKTREE_878_DEVICE(0x1461, 0x0761, "AverMedia AverTV DVB-T 761"),
+	BROOKTREE_878_DEVICE(0x11bd, 0x001c, "Pinnacle PCTV Sat"),
+	BROOKTREE_878_DEVICE(0x11bd, 0x0026, "Pinnacle PCTV SAT CI"),
+	BROOKTREE_878_DEVICE(0x1822, 0x0001, "Twinhan VisionPlus DVB"),
+	BROOKTREE_878_DEVICE(0x270f, 0xfc00,
+				"ChainTech digitop DST-1000 DVB-S"),
+	BROOKTREE_878_DEVICE(0x1461, 0x0771, "AVermedia AverTV DVB-T 771"),
+	BROOKTREE_878_DEVICE(0x18ac, 0xdb10, "DViCO FusionHDTV DVB-T Lite"),
+	BROOKTREE_878_DEVICE(0x18ac, 0xdb11, "Ultraview DVB-T Lite"),
+	BROOKTREE_878_DEVICE(0x18ac, 0xd500, "DViCO FusionHDTV 5 Lite"),
+	BROOKTREE_878_DEVICE(0x7063, 0x2000, "pcHDTV HD-2000 TV"),
+	BROOKTREE_878_DEVICE(0x1822, 0x0026, "DNTV Live! Mini"),
+	{ }
 };
 
+MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
+
+static const char * __devinit card_name(const struct pci_device_id *id)
+{
+	return id->driver_data ? (const char *)id->driver_data : "Unknown";
+}
 
 /***********************/
 /* PCI device handling */
@@ -403,15 +417,13 @@ static struct cards card_list[] __devinitdata = {
 static int __devinit bt878_probe(struct pci_dev *dev,
 				 const struct pci_device_id *pci_id)
 {
-	int result = 0, has_dvb = 0, i;
+	int result = 0;
 	unsigned char lat;
 	struct bt878 *bt;
 #if defined(__powerpc__)
 	unsigned int cmd;
 #endif
 	unsigned int cardid;
-	unsigned short id;
-	struct cards *dvb_cards;
 
 	printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
 	       bt878_num);
@@ -423,25 +435,11 @@ static int __devinit bt878_probe(struct pci_dev *dev,
 	if (pci_enable_device(dev))
 		return -EIO;
 
-	pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &id);
-	cardid = id << 16;
-	pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &id);
-	cardid |= id;
-
-	for (i = 0, dvb_cards = card_list; i < ARRAY_SIZE(card_list); i++, dvb_cards++) {
-		if (cardid == dvb_cards->pci_id) {
-			printk("%s: card id=[0x%x],[ %s ] has DVB functions.\n",
-				__func__, cardid, dvb_cards->name);
-			has_dvb = 1;
-		}
-	}
+	cardid = dev->subsystem_device << 16;
+	cardid |= dev->subsystem_vendor;
 
-	if (!has_dvb) {
-		printk("%s: card id=[0x%x], Unknown card.\nExiting..\n", __func__, cardid);
-		result = -EINVAL;
-
-		goto fail0;
-	}
+	printk(KERN_INFO "%s: card id=[0x%x],[ %s ] has DVB functions.\n",
+				__func__, cardid, card_name(pci_id));
 
 	bt = &bt878[bt878_num];
 	bt->dev = dev;
@@ -572,14 +570,6 @@ static void __devexit bt878_remove(struct pci_dev *pci_dev)
 	return;
 }
 
-static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
-	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BROOKTREE_878,
-	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{0,}
-};
-
-MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
-
 static struct pci_driver bt878_pci_driver = {
       .name	= "bt878",
       .id_table = bt878_pci_tbl,

drivers/media/dvb/bt8xx/bt878.h

@@ -101,12 +101,6 @@
 #define BTTV_BOARD_DVICO_DVBT_LITE         0x80
 #define BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE 0x87
 
-struct cards {
-	__u32 pci_id;
-	__u16 card_id;
-	char  *name;
-};
-
 extern int bt878_num;
 
 struct bt878 {