V4L/DVB (7595): Improve generic support for setting gpio values

em28xx based devices with xc3028 may require some specific gpio values.
This patch adds a generic handling for such values.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/em28xx/em28xx-cards.c

@@ -194,9 +194,6 @@ struct em28xx_board em28xx_boards[] = {
 			.vmux     = TVP5150_SVIDEO,
 			.amux     = 1,
 		} },
-
-		/* gpio's 4, 1, 0 */
-		.analog_gpio = 0x003d2d,
 	},
 	[EM2880_BOARD_TERRATEC_HYBRID_XS] = {
 		.name         = "Terratec Hybrid XS",
@@ -445,73 +442,88 @@ static struct em28xx_hash_table em28xx_i2c_hash[] = {
 	{0xf51200e3, EM2800_BOARD_VGEAR_POCKETTV, TUNER_LG_PAL_NEW_TAPC},
 };
 
+int em28xx_tuner_callback(void *ptr, int command, int arg)
+{
+	int rc = 0, i;
+	struct em28xx *dev = ptr;
+	struct gpio_ctl (*gpio_ctl)[MAX_GPIO];
+
+	if (dev->tuner_type != TUNER_XC2028)
+		return 0;
+
+	if (command != XC2028_TUNER_RESET)
+		return 0;
+
+	if (dev->mode == EM28XX_ANALOG_MODE)
+		gpio_ctl = dev->analog_gpio;
+	else
+		gpio_ctl = dev->digital_gpio;
+
+	/* Send GPIO reset sequences specified at board entry */
+	for (i = 0; i < MAX_GPIO; i++) {
+		if (!gpio_ctl[i]->val)
+			break;
+
+		dev->em28xx_write_regs(dev,
+				       gpio_ctl[i]->reg,
+				       &gpio_ctl[i]->val, 1);
+		if (gpio_ctl[i]->t1)
+			msleep(gpio_ctl[i]->t1);
+
+		if (!gpio_ctl[i]->rst)
+			continue;
+		dev->em28xx_write_regs(dev,
+				       gpio_ctl[i]->reg,
+				       &gpio_ctl[i]->rst, 1);
+		if (gpio_ctl[i]->t2)
+			msleep(gpio_ctl[i]->t2);
+
+		dev->em28xx_write_regs(dev,
+				       gpio_ctl[i]->reg,
+				       &gpio_ctl[i]->val, 1);
+		if (gpio_ctl[i]->t3)
+			msleep(gpio_ctl[i]->t3);
+	}
+	return rc;
+}
+EXPORT_SYMBOL_GPL(em28xx_tuner_callback);
+
+static void em28xx_set_model(struct em28xx *dev)
+{
+	dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
+	dev->has_msp34xx = em28xx_boards[dev->model].has_msp34xx;
+	dev->tda9887_conf = em28xx_boards[dev->model].tda9887_conf;
+	dev->decoder = em28xx_boards[dev->model].decoder;
+	dev->video_inputs = em28xx_boards[dev->model].vchannels;
+	dev->has_12mhz_i2s = em28xx_boards[dev->model].has_12mhz_i2s;
+	dev->max_range_640_480 = em28xx_boards[dev->model].max_range_640_480;
+	dev->has_dvb = em28xx_boards[dev->model].has_dvb;
+	dev->analog_gpio = &em28xx_boards[dev->model].analog_gpio;
+	dev->digital_gpio = &em28xx_boards[dev->model].digital_gpio;
+}
+
 /* Since em28xx_pre_card_setup() requires a proper dev->model,
  * this won't work for boards with generic PCI IDs
  */
 void em28xx_pre_card_setup(struct em28xx *dev)
 {
+	em28xx_set_model(dev);
+
 	/* request some modules */
 	switch (dev->model) {
 	case EM2880_BOARD_TERRATEC_PRODIGY_XS:
 	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
-	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 	case EM2880_BOARD_TERRATEC_HYBRID_XS:
+	case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 		em28xx_write_regs(dev, XCLK_REG, "\x27", 1);
 		em28xx_write_regs(dev, I2C_CLK_REG, "\x40", 1);
-		em28xx_write_regs(dev, 0x08, "\xff", 1);
-		em28xx_write_regs(dev, 0x04, "\x00", 1);
-		msleep(100);
-		em28xx_write_regs(dev, 0x04, "\x08", 1);
-		msleep(100);
-		em28xx_write_regs(dev, 0x08, "\xff", 1);
-		msleep(50);
-		em28xx_write_regs(dev, 0x08, "\x2d", 1);
-		msleep(50);
-		em28xx_write_regs(dev, 0x08, "\x3d", 1);
-		break;
 	}
-}
-
-static int em28xx_tuner_callback(void *ptr, int command, int arg)
-{
-	int rc = 0;
-	struct em28xx *dev = ptr;
-
-	if (dev->tuner_type != TUNER_XC2028)
-		return 0;
 
-	switch (command) {
-	case XC2028_TUNER_RESET:
-	{
-		/* GPIO and initialization codes for analog TV and radio
-		   This code should be complemented for DTV, since reset
-		   codes are different.
-		 */
-
-		dev->em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1);
-		dev->em28xx_write_regs_req(dev, 0x00, 0x12, "\x67", 1);
-
-		if (dev->analog_gpio) {
-			char gpio0 = dev->analog_gpio & 0xff;
-			char gpio1 = (dev->analog_gpio >> 8) & 0xff;
-			char gpio4 = dev->analog_gpio >> 24;
-
-			if (gpio4) {
-				dev->em28xx_write_regs(dev, 0x04, &gpio4, 1);
-				msleep(140);
-			}
-
-			msleep(6);
-			dev->em28xx_write_regs(dev, 0x08, &gpio0, 1);
-			msleep(10);
-			dev->em28xx_write_regs(dev, 0x08, &gpio1, 1);
-			msleep(5);
-		}
-
-		break;
-	}
-	}
-	return rc;
+	/* Put xc2028 tuners and demods into a sane state */
+	if (dev->tuner_type == TUNER_XC2028) {
+		dev->mode = EM28XX_DIGITAL_MODE;
+		em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
+	};
 }
 
 static void em28xx_config_tuner(struct em28xx *dev)
@@ -634,20 +646,6 @@ static int em28xx_hint_board(struct em28xx *dev)
 	return -1;
 }
 
-
-static void em28xx_set_model(struct em28xx *dev)
-{
-	dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
-	dev->has_msp34xx = em28xx_boards[dev->model].has_msp34xx;
-	dev->tda9887_conf = em28xx_boards[dev->model].tda9887_conf;
-	dev->decoder = em28xx_boards[dev->model].decoder;
-	dev->video_inputs = em28xx_boards[dev->model].vchannels;
-	dev->analog_gpio = em28xx_boards[dev->model].analog_gpio;
-	dev->has_12mhz_i2s = em28xx_boards[dev->model].has_12mhz_i2s;
-	dev->max_range_640_480 = em28xx_boards[dev->model].max_range_640_480;
-	dev->has_dvb = em28xx_boards[dev->model].has_dvb;
-}
-
 /* ----------------------------------------------------------------------- */
 void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir)
 {

drivers/media/video/em28xx/em28xx-core.c

@@ -314,14 +314,36 @@ int em28xx_colorlevels_set_default(struct em28xx *dev)
 
 int em28xx_capture_start(struct em28xx *dev, int start)
 {
-	int ret;
+	int rc;
 	/* FIXME: which is the best order? */
 	/* video registers are sampled by VREF */
-	if ((ret = em28xx_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00,
-					  0x10)) < 0)
-		return ret;
+	rc = em28xx_write_reg_bits(dev, USBSUSP_REG,
+				   start ? 0x10 : 0x00, 0x10);
+	if (rc < 0)
+		return rc;
+
+	if (!start) {
+		/* disable video capture */
+		rc = em28xx_write_regs(dev, VINENABLE_REG, "\x27", 1);
+		if (rc < 0)
+			return rc;
+	}
+
 	/* enable video capture */
-	return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1);
+	rc = em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1);
+	if (rc < 0)
+		return rc;
+	if (dev->mode == EM28XX_ANALOG_MODE)
+		rc = em28xx_write_regs(dev, VINENABLE_REG,"\x67", 1);
+	else
+		rc = em28xx_write_regs(dev, VINENABLE_REG,"\x37", 1);
+
+	if (rc < 0)
+		return rc;
+
+	msleep (6);
+
+	return rc;
 }
 
 int em28xx_outfmt_set_yuv422(struct em28xx *dev)

drivers/media/video/em28xx/em28xx.h

@@ -218,6 +218,21 @@ enum em28xx_decoder {
 	EM28XX_SAA7114
 };
 
+#define MAX_GPIO 2
+struct gpio_ctl {
+		/* Register to be set */
+	unsigned char reg;
+		/* Initial/final value */
+	unsigned char val;
+		/* reset value - if set, it will do:
+		   val1 - val2 - val1
+		 */
+	unsigned char rst;
+		/* Sleep times
+		 */
+	unsigned int  t1, t2, t3;
+};
+
 struct em28xx_board {
 	char *name;
 	int vchannels;
@@ -233,7 +248,8 @@ struct em28xx_board {
 	unsigned int max_range_640_480:1;
 	unsigned int has_dvb:1;
 
-	unsigned int analog_gpio;
+	struct gpio_ctl analog_gpio[MAX_GPIO];
+	struct gpio_ctl digital_gpio[MAX_GPIO];
 
 	enum em28xx_decoder decoder;
 
@@ -293,7 +309,6 @@ struct em28xx {
 	char name[30];		/* name (including minor) of the device */
 	int model;		/* index in the device_data struct */
 	int devno;		/* marks the number of this device */
-	unsigned int analog_gpio;
 	unsigned int is_em2800:1;
 	unsigned int has_msp34xx:1;
 	unsigned int has_tda9887:1;
@@ -303,6 +318,9 @@ struct em28xx {
 	unsigned int max_range_640_480:1;
 	unsigned int has_dvb:1;
 
+	struct gpio_ctl (*analog_gpio)[MAX_GPIO];
+	struct gpio_ctl (*digital_gpio)[MAX_GPIO];
+
 	int video_inputs;	/* number of video inputs */
 	struct list_head	devlist;
 
@@ -443,6 +461,7 @@ extern struct em28xx_board em28xx_boards[];
 extern struct usb_device_id em28xx_id_table[];
 extern const unsigned int em28xx_bcount;
 void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);
+int em28xx_tuner_callback(void *ptr, int command, int arg);
 
 /* Provided by em28xx-input.c */
 /* TODO: Check if the standard get_key handlers on ir-common can be used */