[media] em28xx: add support for EM28174 chip

EM28174 is very similar as already supported EM2874.
I am not sure what are differences, but it could be analog support.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index bdd8618..9a5ac56 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -2810,6 +2810,11 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
                        dev->reg_gpio_num = EM2874_R80_GPIO;
                        dev->wait_after_write = 0;
                        break;
+               case CHIP_ID_EM28174:
+                       em28xx_info("chip ID is em28174\n");
+                       dev->reg_gpio_num = EM2874_R80_GPIO;
+                       dev->wait_after_write = 0;
+                       break;
                case CHIP_ID_EM2883:
                        em28xx_info("chip ID is em2882/em2883\n");
                        dev->wait_after_write = 0;

diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c
index 44c63cb..92b6dd8 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-core.c
+++ b/drivers/media/video/em28xx/em28xx-core.c
@@ -614,7 +614,7 @@ int em28xx_capture_start(struct em28xx *dev, int start)
 {
        int rc;
 
-       if (dev->chip_id == CHIP_ID_EM2874) {
+       if (dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM28174) {
                /* The Transport Stream Enable Register moved in em2874 */
                if (!start) {
                        rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
@@ -1111,6 +1111,10 @@ int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev)
                /* FIXME - for now assume 564 like it was before, but the
                   em2874 code should be added to return the proper value... */
                packet_size = 564;
+       } else if (dev->chip_id == CHIP_ID_EM28174) {
+               /* FIXME same as em2874. 564 was enough for 22 Mbit DVB-T
+                  but too much for 44 Mbit DVB-C. */
+               packet_size = 752;
        } else {
                /* TS max packet size stored in bits 1-0 of R01 */
                chip_cfg2 = em28xx_read_reg(dev, EM28XX_R01_CHIPCFG2);

diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c
index 71474d3..4739fc7 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-i2c.c
+++ b/drivers/media/video/em28xx/em28xx-i2c.c
@@ -332,7 +332,7 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len)
        struct em28xx_eeprom *em_eeprom = (void *)eedata;
        int i, err, size = len, block;
 
-       if (dev->chip_id == CHIP_ID_EM2874) {
+       if (dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM28174) {
                /* Empia switched to a 16-bit addressable eeprom in newer
                   devices.  While we could certainly write a routine to read
                   the eeprom, there is nothing of use in there that cannot be

diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h
index 91e9055..e92a28e 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-reg.h
+++ b/drivers/media/video/em28xx/em28xx-reg.h
@@ -201,6 +201,7 @@ enum em28xx_chip_id {
        CHIP_ID_EM2870 = 35,
        CHIP_ID_EM2883 = 36,
        CHIP_ID_EM2874 = 65,
+       CHIP_ID_EM28174 = 113,
 };
 
 /*