[PATCH] BTTV support for Adlink RTV24 capture card

The bttv module currently lacks support for the Adlink RTV24 capture card.
The following patch adds support for the Adlink RTV24 video capture card to
the bttv module.

Cc: Gerd Knorr <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/media/video/bttv-cards.c

···
 static void osprey_eeprom(struct bttv *btv);
 static void modtec_eeprom(struct bttv *btv);
 static void init_PXC200(struct bttv *btv);
+static void init_RTV24(struct bttv *btv);
 
 static void winview_audio(struct bttv *btv, struct video_audio *v, int set);
 static void lt9415_audio(struct bttv *btv, struct video_audio *v, int set);
···
 	.no_tda7432	= 1,
 	.no_tda9875	= 1,
 	.muxsel_hook	= kodicom4400r_muxsel,
+},
+{
+	/* ---- card 0x86---------------------------------- */
+	/* Michael Henson <[e-mail]> */
+	/* Adlink RTV24 with special unlock codes */
+	.name           = "Adlink RTV24",
+	.video_inputs   = 4,
+	.audio_inputs   = 1,
+	.tuner          = 0,
+	.svhs           = 2,
+	.muxsel         = { 2, 3, 1, 0},
+	.tuner_type     = -1,
+	.pll            = PLL_28,
 }};
 
 static const unsigned int bttv_num_tvcards = ARRAY_SIZE(bttv_tvcards);
···
 	case BTTV_KODICOM_4400R:
 		kodicom4400r_init(btv);
 		break;
+        case BTTV_ADLINK_RTV24:
+                init_RTV24(btv);
+                break;
 	}
 
 	/* pll configuration */
···
 	printk(KERN_INFO "PXC200 Initialised.\n");
 }
 
+/* ----------------------------------------------------------------------- */
+/*
+ *  The Adlink RTV-24 (aka Angelo) has some special initialisation to unlock
+ *  it. This apparently involves the following procedure for each 878 chip:
+ *
+ *  1) write 0x00C3FEFF to the GPIO_OUT_EN register
+ *
+ *  2)  write to GPIO_DATA
+ *      - 0x0E
+ *      - sleep 1ms
+ *      - 0x10 + 0x0E
+ *      - sleep 10ms
+ *      - 0x0E
+ *     read from GPIO_DATA into buf (uint_32)
+ *      - if ( data>>18 & 0x01 != 0) || ( buf>>19 & 0x01 != 1 )
+ *                 error. ERROR_CPLD_Check_Failed stop.
+ *
+ *  3) write to GPIO_DATA
+ *      - write 0x4400 + 0x0E
+ *      - sleep 10ms
+ *      - write 0x4410 + 0x0E
+ *      - sleep 1ms
+ *      - write 0x0E
+ *     read from GPIO_DATA into buf (uint_32)
+ *      - if ( buf>>18 & 0x01 ) || ( buf>>19 && 0x01 != 0 )
+ *                error. ERROR_CPLD_Check_Failed.
+ */
+/* ----------------------------------------------------------------------- */
+void init_RTV24(struct bttv *btv)
+{
+	u32 dataread;
+	const long watchdog_value = 0x0E;
+
+	printk(KERN_INFO "bttv%d: Adlink RTV-24 initialisation in progress\n",
+		btv->c.nr);
+
+	btwrite(0x00c3feff, BT848_GPIO_OUT_EN);
+
+	btwrite(0 + watchdog_value, BT848_GPIO_DATA);
+	msleep(1);
+	btwrite(0x10 + watchdog_value, BT848_GPIO_DATA);
+	msleep( 10 );
+	btwrite(0 + watchdog_value, BT848_GPIO_DATA);
+
+	dataread = btread(BT848_GPIO_DATA);
+
+	if (((dataread >> 18) & 0x01) != 0 || ((dataread >> 19) & 0x01) != 1) {
+		printk(KERN_INFO "bttv%d: Adlink RTV-24 initialisation(1) "
+				"ERROR_CPLD_Check_Failed (read %d)\n",
+				btv->c.nr, dataread);
+	}
+
+	btwrite(0x4400 + watchdog_value, BT848_GPIO_DATA);
+	msleep(10);
+	btwrite(0x4410 + watchdog_value, BT848_GPIO_DATA);
+	msleep(1);
+	btwrite(watchdog_value, BT848_GPIO_DATA);
+	msleep(1);
+	dataread = btread(BT848_GPIO_DATA);
+
+	if (((dataread >> 18) & 0x01) != 0 || ((dataread >> 19) & 0x01) != 0) {
+		printk(KERN_INFO "bttv%d: Adlink RTV-24 initialisation(2) "
+				"ERROR_CPLD_Check_Failed (read %d)\n",
+				btv->c.nr, dataread);
+		return;
+	}
+
+	printk(KERN_INFO "bttv%d: Adlink RTV-24 initialisation complete.\n",
+			btv->c.nr);
+}
 
 /* ----------------------------------------------------------------------- */
 /* Miro Pro radio stuff -- the tea5757 is connected to some GPIO ports     */

drivers/media/video/bttv.h

···
 #define BTTV_DVICO_DVBT_LITE  0x80
 #define BTTV_TIBET_CS16  0x83
 #define BTTV_KODICOM_4400R  0x84
+#define BTTV_ADLINK_RTV24   0x86
 
 /* i2c address list */
 #define I2C_TSA5522        0xc2