[media] em28xx: Add support for Leadership ISDB-T

This device uses an em2874B + Sharp 921 One Seg frontend.

Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 81 insertions, 4 deletions

diff --git a/drivers/media/video/em28xx/Kconfig b/drivers/media/video/em28xx/Kconfig
index 66aefd6eef55..8d38c5fdece0 100644
--- a/drivers/media/video/em28xx/Kconfig
+++ b/drivers/media/video/em28xx/Kconfig
@@ -37,6 +37,7 @@ config VIDEO_EM28XX_DVB
         select DVB_LGDT330X if !DVB_FE_CUSTOMISE
         select DVB_ZL10353 if !DVB_FE_CUSTOMISE
         select DVB_TDA10023 if !DVB_FE_CUSTOMISE
+        select DVB_S921 if !DVB_FE_CUSTOMISE
         select VIDEOBUF_DVB
         ---help---
           This adds support for DVB cards based on the
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index f7e9168157a5..24caa8512ba8 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -268,6 +268,20 @@ static struct em28xx_reg_seq dikom_dk300_digital[] = {
 };
 
 
+/* Reset for the most [digital] boards */
+static struct em28xx_reg_seq leadership_digital[] = {
+        {EM2874_R80_GPIO,       0x70,   0xff,   10},
+        {       -1,             -1,     -1,     -1},
+};
+
+static struct em28xx_reg_seq leadership_reset[] = {
+        {EM2874_R80_GPIO,       0xf0,   0xff,   10},
+        {EM2874_R80_GPIO,       0xb0,   0xff,   10},
+        {EM2874_R80_GPIO,       0xf0,   0xff,   10},
+        {       -1,             -1,     -1,     -1},
+};
+
+
 /*
  *  Board definitions
  */
@@ -1224,6 +1238,19 @@ struct em28xx_board em28xx_boards[] = {
                         .vmux     = SAA7115_COMPOSITE0,
                 } },
         },
+
+        [EM2874_LEADERSHIP_ISDBT] = {
+                .i2c_speed      = EM2874_I2C_SECONDARY_BUS_SELECT |
+                                  EM28XX_I2C_CLK_WAIT_ENABLE |
+                                  EM28XX_I2C_FREQ_100_KHZ,
+                .xclk           = EM28XX_XCLK_FREQUENCY_10MHZ,
+                .name           = "EM2874 Leadership ISDBT",
+                .tuner_type     = TUNER_ABSENT,
+                .tuner_gpio     = leadership_reset,
+                .dvb_gpio       = leadership_digital,
+                .has_dvb        = 1,
+        },
+
         [EM2880_BOARD_MSI_DIGIVOX_AD] = {
                 .name         = "MSI DigiVox A/D",
                 .valid        = EM28XX_BOARD_NOT_VALIDATED,
@@ -1754,6 +1781,8 @@ struct usb_device_id em28xx_id_table[] = {
                         .driver_info = EM2820_BOARD_UNKNOWN },
         { USB_DEVICE(0xeb1a, 0x2868),
                         .driver_info = EM2820_BOARD_UNKNOWN },
+        { USB_DEVICE(0xeb1a, 0x2875),
+                        .driver_info = EM2820_BOARD_UNKNOWN },
         { USB_DEVICE(0xeb1a, 0xe300),
                         .driver_info = EM2861_BOARD_KWORLD_PVRTV_300U },
         { USB_DEVICE(0xeb1a, 0xe303),
@@ -1873,6 +1902,7 @@ static struct em28xx_hash_table em28xx_i2c_hash[] = {
         {0x77800080, EM2860_BOARD_TVP5150_REFERENCE_DESIGN, TUNER_ABSENT},
         {0xc51200e3, EM2820_BOARD_GADMEI_TVR200, TUNER_LG_PAL_NEW_TAPC},
         {0x4ba50080, EM2861_BOARD_GADMEI_UTV330PLUS, TUNER_TNF_5335MF},
+        {0x6b800080, EM2874_LEADERSHIP_ISDBT, TUNER_ABSENT},
 };
 
 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
@@ -2430,8 +2460,36 @@ void em28xx_card_setup(struct em28xx *dev)
                         dev->board.is_webcam = 0;
                 else
                         dev->progressive = 1;
-        } else
-                em28xx_set_model(dev);
+        }
+
+        if (!dev->board.is_webcam) {
+                switch (dev->model) {
+                case EM2820_BOARD_UNKNOWN:
+                case EM2800_BOARD_UNKNOWN:
+                /*
+                 * The K-WORLD DVB-T 310U is detected as an MSI Digivox AD.
+                 *
+                 * This occurs because they share identical USB vendor and
+                 * product IDs.
+                 *
+                 * What we do here is look up the EEPROM hash of the K-WORLD
+                 * and if it is found then we decide that we do not have
+                 * a DIGIVOX and reset the device to the K-WORLD instead.
+                 *
+                 * This solution is only valid if they do not share eeprom
+                 * hash identities which has not been determined as yet.
+                 */
+                if (em28xx_hint_board(dev) < 0)
+                        em28xx_errdev("Board not discovered\n");
+                else {
+                        em28xx_set_model(dev);
+                        em28xx_pre_card_setup(dev);
+                }
+                break;
+                default:
+                        em28xx_set_model(dev);
+                }
+        }
 
         em28xx_info("Identified as %s (card=%d)\n",
                     dev->board.name, dev->model);
@@ -2749,8 +2807,8 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
         em28xx_pre_card_setup(dev);
 
         if (!dev->board.is_em2800) {
-                /* Sets I2C speed to 100 KHz */
-                retval = em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
+                /* Resets I2C speed */
+                em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, dev->board.i2c_speed);
                 if (retval < 0) {
                         em28xx_errdev("%s: em28xx_write_regs_req failed!"
                                       " retval [%d]\n",
diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c
index 3ac8d3025fea..c7c04bf712aa 100644
--- a/drivers/media/video/em28xx/em28xx-dvb.c
+++ b/drivers/media/video/em28xx/em28xx-dvb.c
@@ -37,6 +37,7 @@
 #include "mt352_priv.h" /* FIXME */
 #include "tda1002x.h"
 #include "tda18271.h"
+#include "s921.h"
 
 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
@@ -245,6 +246,10 @@ static struct lgdt3305_config em2870_lgdt3304_dev = {
         .qam_if_khz         = 4000,
 };
 
+static struct s921_config sharp_isdbt = {
+        .demod_address = 0x30 >> 1
+};
+
 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
         .demod_address = (0x1e >> 1),
         .no_tuner = 1,
@@ -481,6 +486,7 @@ static int dvb_init(struct em28xx *dev)
 
         if (!dev->board.has_dvb) {
                 /* This device does not support the extension */
+                printk(KERN_INFO "em28xx_dvb: This device does not support the extension\n");
                 return 0;
         }
 
@@ -496,6 +502,16 @@ static int dvb_init(struct em28xx *dev)
         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
         /* init frontend */
         switch (dev->model) {
+        case EM2874_LEADERSHIP_ISDBT:
+                dvb->frontend = dvb_attach(s921_attach,
+                                &sharp_isdbt, &dev->i2c_adap);
+
+                if (!dvb->frontend) {
+                        result = -EINVAL;
+                        goto out_free;
+                }
+
+                break;
         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index 6a75e6a4fc21..6a48043a7b92 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -117,6 +117,8 @@
 #define EM2800_BOARD_VC211A                       74
 #define EM2882_BOARD_DIKOM_DK300                  75
 #define EM2870_BOARD_KWORLD_A340                  76
+#define EM2874_LEADERSHIP_ISDBT                   77
+
 
 /* Limits minimum and default number of buffers */
 #define EM28XX_MIN_BUF 4