From ba340b40a5f65261731583f67d7ec8cafbf5cfaa Mon Sep 17 00:00:00 2001 From: Brian Rogers Date: Mon, 13 Oct 2008 08:37:06 -0300 Subject: V4L/DVB (9168): Add support for MSI TV@nywhere Plus remote The IR controller has a couple quirks. It won't respond until some other device on the bus is probed. To work around that, probe 0x50 first. Then, since it won't respond to a zero-byte read, probe with a one-byte read. Signed-off-by: Brian Rogers [mchehab.redhat.com: Fix merge conflicts and remove an unused var] Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/saa7134/saa7134-input.c | 52 +++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) (limited to 'drivers/media/video/saa7134/saa7134-input.c') diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c index 72a1c67a8c39..c53fd5f9f6b5 100644 --- a/drivers/media/video/saa7134/saa7134-input.c +++ b/drivers/media/video/saa7134/saa7134-input.c @@ -118,6 +118,53 @@ static int build_key(struct saa7134_dev *dev) /* --------------------- Chip specific I2C key builders ----------------- */ +static int get_key_msi_tvanywhere_plus(struct IR_i2c *ir, u32 *ir_key, + u32 *ir_raw) +{ + unsigned char b; + int gpio; + + /* is needed to access GPIO. Used by the saa_readl macro. */ + struct saa7134_dev *dev = ir->c.adapter->algo_data; + if (dev == NULL) { + dprintk("get_key_msi_tvanywhere_plus: " + "gir->c.adapter->algo_data is NULL!\n"); + return -EIO; + } + + /* rising SAA7134_GPIO_GPRESCAN reads the status */ + + saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN); + saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN); + + gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2); + + /* GPIO&0x40 is pulsed low when a button is pressed. Don't do + I2C receive if gpio&0x40 is not low. */ + + if (gpio & 0x40) + return 0; /* No button press */ + + /* GPIO says there is a button press. Get it. */ + + if (1 != i2c_master_recv(&ir->c, &b, 1)) { + i2cdprintk("read error\n"); + return -EIO; + } + + /* No button press */ + + if (b == 0xff) + return 0; + + /* Button pressed */ + + dprintk("get_key_msi_tvanywhere_plus: Key = 0x%02X\n", b); + *ir_key = b; + *ir_raw = b; + return 1; +} + static int get_key_purpletv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) { unsigned char b; @@ -641,6 +688,11 @@ void saa7134_set_i2c_ir(struct saa7134_dev *dev, struct IR_i2c *ir) ir->get_key = get_key_purpletv; ir->ir_codes = ir_codes_purpletv; break; + case SAA7134_BOARD_MSI_TVATANYWHERE_PLUS: + snprintf(ir->c.name, sizeof(ir->c.name), "MSI TV@nywhere Plus"); + ir->get_key = get_key_msi_tvanywhere_plus; + ir->ir_codes = ir_codes_msi_tvanywhere_plus; + break; case SAA7134_BOARD_HAUPPAUGE_HVR1110: snprintf(ir->c.name, sizeof(ir->c.name), "HVR 1110"); ir->get_key = get_key_hvr1110; -- cgit v1.2.3