[media] Add support for KWorld PC150-U ATSC hybrid tuner card

[mchehab@redhat.com: CodingStyle fixes]
Signed-off-by: Kyle Strickland <kyle@kyle.strickland.name>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c
index 22ecd7297d2..48d2878699b 100644
--- a/drivers/media/video/saa7134/saa7134-input.c
+++ b/drivers/media/video/saa7134/saa7134-input.c
@@ -210,6 +210,54 @@ static int get_key_msi_tvanywhere_plus(struct IR_i2c *ir, u32 *ir_key,
         return 1;
 }
 
+/* copied and modified from get_key_msi_tvanywhere_plus() */
+static int get_key_kworld_pc150u(struct IR_i2c *ir, u32 *ir_key,
+                                        u32 *ir_raw)
+{
+        unsigned char b;
+        unsigned int gpio;
+
+        /* <dev> is needed to access GPIO. Used by the saa_readl macro. */
+        struct saa7134_dev *dev = ir->c->adapter->algo_data;
+        if (dev == NULL) {
+                i2cdprintk("get_key_kworld_pc150u: "
+                           "ir->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&0x100 is pulsed low when a button is pressed. Don't do
+           I2C receive if gpio&0x100 is not low. */
+
+        if (gpio & 0x100)
+                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_kworld_pc150u: 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;
@@ -901,6 +949,21 @@ void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
                         msg_msi.addr, dev->i2c_adap.name,
                         (1 == rc) ? "yes" : "no");
                 break;
+        case SAA7134_BOARD_KWORLD_PC150U:
+                /* copied and modified from MSI TV@nywhere Plus */
+                dev->init_data.name = "Kworld PC150-U";
+                dev->init_data.get_key = get_key_kworld_pc150u;
+                dev->init_data.ir_codes = RC_MAP_KWORLD_PC150U;
+                info.addr = 0x30;
+                /* MSI TV@nywhere Plus controller doesn't seem to
+                   respond to probes unless we read something from
+                   an existing device. Weird...
+                   REVISIT: might no longer be needed */
+                rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
+                dprintk("probe 0x%02x @ %s: %s\n",
+                        msg_msi.addr, dev->i2c_adap.name,
+                        (1 == rc) ? "yes" : "no");
+                break;
         case SAA7134_BOARD_HAUPPAUGE_HVR1110:
                 dev->init_data.name = "HVR 1110";
                 dev->init_data.get_key = get_key_hvr1110;