[PATCH] v4l: 806: add support for tda8275a

- Add support for tda8275a

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t.online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 478 insertions, 160 deletions

diff --git a/drivers/media/video/tda8290.c b/drivers/media/video/tda8290.c
index e2027dada5d1..47d3d2ce9770 100644
--- a/drivers/media/video/tda8290.c
+++ b/drivers/media/video/tda8290.c
@@ -1,177 +1,402 @@
 /*
- *
- * i2c tv tuner chip device driver
- * controls the philips tda8290+75 tuner chip combo.
- */
+
+   i2c tv tuner chip device driver
+   controls the philips tda8290+75 tuner chip combo.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
 #include <linux/i2c.h>
 #include <linux/videodev.h>
 #include <linux/delay.h>
 #include <media/tuner.h>
 
-#define I2C_ADDR_TDA8290        0x4b
-#define I2C_ADDR_TDA8275        0x61
-
 /* ---------------------------------------------------------------------- */
 
-struct freq_entry {
-	u16	freq;
-	u8	value;
+struct tda827x_data {
+	u32 lomax;
+	u8  spd;
+	u8  bs;
+	u8  bp;
+	u8  cp;
+	u8  gc3;
+	u8 div1p5;
 };
 
-static struct freq_entry band_table[] = {
-	{ 0x2DF4, 0x1C },
-	{ 0x2574, 0x14 },
-	{ 0x22B4, 0x0C },
-	{ 0x20D4, 0x0B },
-	{ 0x1E74, 0x3B },
-	{ 0x1C34, 0x33 },
-	{ 0x16F4, 0x5B },
-	{ 0x1454, 0x53 },
-	{ 0x12D4, 0x52 },
-	{ 0x1034, 0x4A },
-	{ 0x0EE4, 0x7A },
-	{ 0x0D34, 0x72 },
-	{ 0x0B54, 0x9A },
-	{ 0x0914, 0x91 },
-	{ 0x07F4, 0x89 },
-	{ 0x0774, 0xB9 },
-	{ 0x067B, 0xB1 },
-	{ 0x0634, 0xD9 },
-	{ 0x05A4, 0xD8 },	// FM radio
-	{ 0x0494, 0xD0 },
-	{ 0x03BC, 0xC8 },
-	{ 0x0394, 0xF8 },	// 57250000 Hz
-	{ 0x0000, 0xF0 },	// 0
+     /* Note lomax entry is lo / 62500 */
+
+static struct tda827x_data tda827x_analog[] = {
+	{ .lomax =   992, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1}, /*  62 MHz */
+	{ .lomax =  1056, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1}, /*  66 MHz */
+	{ .lomax =  1216, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0}, /*  76 MHz */
+	{ .lomax =  1344, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0}, /*  84 MHz */
+	{ .lomax =  1488, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0}, /*  93 MHz */
+	{ .lomax =  1568, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0}, /*  98 MHz */
+	{ .lomax =  1744, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 109 MHz */
+	{ .lomax =  1968, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 123 MHz */
+	{ .lomax =  2128, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 133 MHz */
+	{ .lomax =  2416, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 151 MHz */
+	{ .lomax =  2464, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 154 MHz */
+	{ .lomax =  2896, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0}, /* 181 MHz */
+	{ .lomax =  2960, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 185 MHz */
+	{ .lomax =  3472, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 217 MHz */
+	{ .lomax =  3904, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 244 MHz */
+	{ .lomax =  4240, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 265 MHz */
+	{ .lomax =  4832, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 302 MHz */
+	{ .lomax =  5184, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 324 MHz */
+	{ .lomax =  5920, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 370 MHz */
+	{ .lomax =  7264, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 454 MHz */
+	{ .lomax =  7888, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 493 MHz */
+	{ .lomax =  8480, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1}, /* 530 MHz */
+	{ .lomax =  8864, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0}, /* 554 MHz */
+	{ .lomax =  9664, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0}, /* 604 MHz */
+	{ .lomax = 11088, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0}, /* 696 MHz */
+	{ .lomax = 11840, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0}, /* 740 MHz */
+	{ .lomax = 13120, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0}, /* 820 MHz */
+	{ .lomax = 13840, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0}, /* 865 MHz */
+	{ .lomax =     0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}  /* End      */
 };
 
-static struct freq_entry div_table[] = {
-	{ 0x1C34, 3 },
-	{ 0x0D34, 2 },
-	{ 0x067B, 1 },
-	{ 0x0000, 0 },
-};
+static void tda827x_tune(struct i2c_client *c, u16 ifc, unsigned int freq)
+{
+	unsigned char tuner_reg[8];
+	unsigned char reg2[2];
+	u32 N;
+	int i;
+	struct tuner *t = i2c_get_clientdata(c);
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .flags = 0};
 
-static struct freq_entry agc_table[] = {
-	{ 0x22B4, 0x8F },
-	{ 0x0B54, 0x9F },
-	{ 0x09A4, 0x8F },
-	{ 0x0554, 0x9F },
-	{ 0x0000, 0xBF },
-};
+	if (t->mode == V4L2_TUNER_RADIO)
+		freq = freq / 1000;
+
+	N = freq + ifc;
+	i = 0;
+	while (tda827x_analog[i].lomax < N) {
+		if(tda827x_analog[i + 1].lomax == 0)
+			break;
+		i++;
+	}
+
+	N = N << tda827x_analog[i].spd;
+
+	tuner_reg[0] = 0;
+	tuner_reg[1] = (unsigned char)(N>>8);
+	tuner_reg[2] = (unsigned char) N;
+	tuner_reg[3] = 0x40;
+	tuner_reg[4] = 0x52 + (t->tda827x_lpsel << 5);
+	tuner_reg[5] = (tda827x_analog[i].spd   << 6) + (tda827x_analog[i].div1p5 <<5) +
+	     	       (tda827x_analog[i].bs     <<3) +  tda827x_analog[i].bp;
+	tuner_reg[6] = 0x8f + (tda827x_analog[i].gc3 << 4);
+	tuner_reg[7] = 0x8f;
+
+	msg.buf = tuner_reg;
+	msg.len = 8;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msg.buf= reg2;
+	msg.len = 2;
+	reg2[0] = 0x80;
+	reg2[1] = 0;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0x60;
+	reg2[1] = 0xbf;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0x30;
+	reg2[1] = tuner_reg[4] + 0x80;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msleep(1);
+	reg2[0] = 0x30;
+	reg2[1] = tuner_reg[4] + 4;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msleep(1);
+	reg2[0] = 0x30;
+	reg2[1] = tuner_reg[4];
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msleep(550);
+	reg2[0] = 0x30;
+	reg2[1] = (tuner_reg[4] & 0xfc) + tda827x_analog[i].cp ;
+	i2c_transfer(c->adapter, &msg, 1);
 
-static __u8 get_freq_entry( struct freq_entry* table, __u16 freq)
+	reg2[0] = 0x60;
+	reg2[1] = 0x7f;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0x80;
+	reg2[1] = 0x08;   // Vsync en
+	i2c_transfer(c->adapter, &msg, 1);
+}
+
+static void tda827x_agcf(struct i2c_client *c)
 {
-	while(table->freq && table->freq > freq)
-		table++;
-	return table->value;
+	struct tuner *t = i2c_get_clientdata(c);
+	unsigned char data[] = {0x80, 0x0c};
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .buf = data,
+			      .flags = 0, .len = 2};
+	i2c_transfer(c->adapter, &msg, 1);
 }
 
 /* ---------------------------------------------------------------------- */
 
-static unsigned char i2c_enable_bridge[2] = 	{ 0x21, 0xC0 };
-static unsigned char i2c_disable_bridge[2] = 	{ 0x21, 0x80 };
-static unsigned char i2c_init_tda8275[14] = 	{ 0x00, 0x00, 0x00, 0x00,
-						  0xfC, 0x04, 0xA3, 0x3F,
-						  0x2A, 0x04, 0xFF, 0x00,
-						  0x00, 0x40 };
-static unsigned char i2c_set_VS[2] = 		{ 0x30, 0x6F };
-static unsigned char i2c_set_GP01_CF[2] = 	{ 0x20, 0x0B };
-static unsigned char i2c_tda8290_reset[2] =	{ 0x00, 0x00 };
-static unsigned char i2c_tda8290_standby[2] =	{ 0x00, 0x02 };
-static unsigned char i2c_gainset_off[2] =	{ 0x28, 0x14 };
-static unsigned char i2c_gainset_on[2] =	{ 0x28, 0x54 };
-static unsigned char i2c_agc3_00[2] =		{ 0x80, 0x00 };
-static unsigned char i2c_agc2_BF[2] =		{ 0x60, 0xBF };
-static unsigned char i2c_cb1_D0[2] =		{ 0x30, 0xD0 };
-static unsigned char i2c_cb1_D2[2] =		{ 0x30, 0xD2 };
-static unsigned char i2c_cb1_56[2] =		{ 0x30, 0x56 };
-static unsigned char i2c_cb1_52[2] =		{ 0x30, 0x52 };
-static unsigned char i2c_cb1_50[2] =		{ 0x30, 0x50 };
-static unsigned char i2c_agc2_7F[2] =		{ 0x60, 0x7F };
-static unsigned char i2c_agc3_08[2] =		{ 0x80, 0x08 };
-
-/* FIXME: European PAL/SECAM should select 9MHz Lowpass Filter, while
-   NTSC/M and PAL/M should be using 7MHz filter, by selecting CB3 */
-static unsigned char i2c_cb3_9MHz[2] =          { 0xc0, 0x39 };
-static unsigned char i2c_cb3_7MHz[2] =          { 0xc0, 0x3B };
-
-static struct i2c_msg i2c_msg_init[] = {
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_init_tda8275), i2c_init_tda8275 },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_VS), i2c_set_VS },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_GP01_CF), i2c_set_GP01_CF },
+struct tda827xa_data {
+	u32 lomax;
+	u8  svco;
+	u8  spd;
+	u8  scr;
+	u8  sbs;
+	u8  gc3;
 };
 
-static struct i2c_msg i2c_msg_prolog[] = {
-//	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_easy_mode), i2c_easy_mode },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_off), i2c_gainset_off },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_reset), i2c_tda8290_reset },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
+static struct tda827xa_data tda827xa_analog[] = {
+	{ .lomax =   910, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 3},  /*  56.875 MHz */
+	{ .lomax =  1076, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},  /*  67.25 MHz */
+	{ .lomax =  1300, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},  /*  81.25 MHz */
+	{ .lomax =  1560, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},  /*  97.5  MHz */
+	{ .lomax =  1820, .svco = 3, .spd = 3, .scr = 0, .sbs = 1, .gc3 = 1},  /* 113.75 MHz */
+	{ .lomax =  2152, .svco = 0, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},  /* 134.5 MHz */
+	{ .lomax =  2464, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},  /* 154   MHz */
+	{ .lomax =  2600, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},  /* 162.5 MHz */
+	{ .lomax =  2928, .svco = 2, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},  /* 183   MHz */
+	{ .lomax =  3120, .svco = 2, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},  /* 195   MHz */
+	{ .lomax =  3640, .svco = 3, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 3},  /* 227.5 MHz */
+	{ .lomax =  4304, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 3},  /* 269   MHz */
+	{ .lomax =  5200, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},  /* 325   MHz */
+	{ .lomax =  6240, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 3},  /* 390   MHz */
+	{ .lomax =  7280, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 3},  /* 455   MHz */
+	{ .lomax =  8320, .svco = 0, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},  /* 520   MHz */
+	{ .lomax =  8608, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},  /* 538   MHz */
+	{ .lomax =  8864, .svco = 1, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},  /* 554   MHz */
+	{ .lomax =  9920, .svco = 1, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},  /* 620   MHz */
+	{ .lomax = 10400, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},  /* 650   MHz */
+	{ .lomax = 11200, .svco = 2, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},  /* 700   MHz */
+	{ .lomax = 12480, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},  /* 780   MHz */
+	{ .lomax = 13120, .svco = 3, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},  /* 820   MHz */
+	{ .lomax = 13920, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},  /* 870   MHz */
+	{ .lomax = 14576, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 0},  /* 911   MHz */
+	{ .lomax =     0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}   /* End */
 };
 
-static struct i2c_msg i2c_msg_config[] = {
-//	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_set_freq), i2c_set_freq },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_00), i2c_agc3_00 },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_BF), i2c_agc2_BF },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D2), i2c_cb1_D2 },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_56), i2c_cb1_56 },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_52), i2c_cb1_52 },
-};
+static void tda827xa_tune(struct i2c_client *c, u16 ifc, unsigned int freq)
+{
+	unsigned char tuner_reg[14];
+	unsigned char reg2[2];
+	u32 N;
+	int i;
+	struct tuner *t = i2c_get_clientdata(c);
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .flags = 0};
 
-static struct i2c_msg i2c_msg_epilog[] = {
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_50), i2c_cb1_50 },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_7F), i2c_agc2_7F },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_08), i2c_agc3_08 },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_on), i2c_gainset_on },
-};
+	if (t->mode == V4L2_TUNER_RADIO)
+		freq = freq / 1000;
 
-static struct i2c_msg i2c_msg_standby[] = {
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
-	{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D0), i2c_cb1_D0 },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
-	{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_standby), i2c_tda8290_standby },
-};
+	N = freq + ifc;
+	i = 0;
+	while (tda827xa_analog[i].lomax < N) {
+		if(tda827xa_analog[i + 1].lomax == 0)
+			break;
+		i++;
+	}
+
+	N = N << tda827xa_analog[i].spd;
+
+	tuner_reg[0] = 0;
+	tuner_reg[1] = (unsigned char)(N>>8);
+	tuner_reg[2] = (unsigned char) N;
+	tuner_reg[3] = 0;
+	tuner_reg[4] = 0x16;
+	tuner_reg[5] = (tda827xa_analog[i].spd << 5) + (tda827xa_analog[i].svco << 3) +
+		        tda827xa_analog[i].sbs;
+	tuner_reg[6] = 0x8b + (tda827xa_analog[i].gc3 << 4);
+	tuner_reg[7] = 0x0c;
+	tuner_reg[8] = 4;
+	tuner_reg[9] = 0x20;
+	tuner_reg[10] = 0xff;
+	tuner_reg[11] = 0xe0;
+	tuner_reg[12] = 0;
+	tuner_reg[13] = 0x39 + (t->tda827x_lpsel << 1);
+
+	msg.buf = tuner_reg;
+	msg.len = 14;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msg.buf= reg2;
+	msg.len = 2;
+	reg2[0] = 0x60;
+	reg2[1] = 0x3c;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0xa0;
+	reg2[1] = 0xc0;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msleep(2);
+	reg2[0] = 0x30;
+	reg2[1] = 0x10 + tda827xa_analog[i].scr;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	msleep(550);
+	reg2[0] = 0x50;
+	reg2[1] = 0x8f + (tda827xa_analog[i].gc3 << 4);
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0x80;
+	reg2[1] = 0x28;
+	i2c_transfer(c->adapter, &msg, 1);
+
+	reg2[0] = 0xb0;
+	reg2[1] = 0x01;
+	i2c_transfer(c->adapter, &msg, 1);
 
-static int tda8290_tune(struct i2c_client *c)
+	reg2[0] = 0xc0;
+	reg2[1] = 0x19 + (t->tda827x_lpsel << 1);
+	i2c_transfer(c->adapter, &msg, 1);
+}
+
+static void tda827xa_agcf(struct i2c_client *c)
 {
 	struct tuner *t = i2c_get_clientdata(c);
-	struct i2c_msg easy_mode =
-		{ I2C_ADDR_TDA8290, 0, 2, t->i2c_easy_mode };
-	struct i2c_msg set_freq =
-		{ I2C_ADDR_TDA8275, 0, 8, t->i2c_set_freq  };
-
-	i2c_transfer(c->adapter, &easy_mode,      1);
-	i2c_transfer(c->adapter, i2c_msg_prolog, ARRAY_SIZE(i2c_msg_prolog));
+	unsigned char data[] = {0x80, 0x2c};
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .buf = data,
+			      .flags = 0, .len = 2};
+	i2c_transfer(c->adapter, &msg, 1);
+}
 
-	i2c_transfer(c->adapter, &set_freq,       1);
-	i2c_transfer(c->adapter, i2c_msg_config, ARRAY_SIZE(i2c_msg_config));
+/*---------------------------------------------------------------------*/
 
-	msleep(550);
-	i2c_transfer(c->adapter, i2c_msg_epilog, ARRAY_SIZE(i2c_msg_epilog));
-	return 0;
+static void tda8290_i2c_bridge(struct i2c_client *c, int close)
+{
+	unsigned char  enable[2] = { 0x21, 0xC0 };
+	unsigned char disable[2] = { 0x21, 0x80 };
+	unsigned char *msg;
+	if(close) {
+		msg = enable;
+		i2c_master_send(c, msg, 2);
+		/* let the bridge stabilize */
+		msleep(20);
+	} else {
+		msg = disable;
+		i2c_master_send(c, msg, 2);
+	}
 }
 
-static void set_frequency(struct tuner *t, u16 ifc, unsigned int freq)
+/*---------------------------------------------------------------------*/
+
+static int tda8290_tune(struct i2c_client *c, u16 ifc, unsigned int freq)
 {
-	u32 N;
+	struct tuner *t = i2c_get_clientdata(c);
+	unsigned char soft_reset[]  = { 0x00, 0x00 };
+	unsigned char easy_mode[]   = { 0x01, t->tda8290_easy_mode };
+	unsigned char expert_mode[] = { 0x01, 0x80 };
+	unsigned char gainset_off[] = { 0x28, 0x14 };
+	unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
+	unsigned char adc_head_6[]  = { 0x05, 0x04 };
+	unsigned char adc_head_9[]  = { 0x05, 0x02 };
+	unsigned char adc_head_12[] = { 0x05, 0x01 };
+	unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
+	unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
+	unsigned char gainset_2[]   = { 0x28, 0x64 };
+	unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
+	unsigned char agc_rst_off[] = { 0x0e, 0x09 };
+	unsigned char if_agc_set[]  = { 0x0f, 0x81 };
+	unsigned char addr_adc_sat  = 0x1a;
+	unsigned char addr_agc_stat = 0x1d;
+	unsigned char addr_pll_stat = 0x1b;
+	unsigned char adc_sat, agc_stat,
+	              pll_stat;
+
+	i2c_master_send(c, easy_mode, 2);
+	i2c_master_send(c, soft_reset, 2);
+	msleep(1);
+
+	i2c_master_send(c, expert_mode, 2);
+	i2c_master_send(c, gainset_off, 2);
+	i2c_master_send(c, if_agc_spd, 2);
+	if (t->tda8290_easy_mode & 0x60)
+		i2c_master_send(c, adc_head_9, 2);
+	else
+		i2c_master_send(c, adc_head_6, 2);
+	i2c_master_send(c, pll_bw_nom, 2);
+
+	tda8290_i2c_bridge(c, 1);
+	if (t->tda827x_ver != 0)
+		tda827xa_tune(c, ifc, freq);
+	else
+		tda827x_tune(c, ifc, freq);
+	/* adjust headroom resp. gain */
+	i2c_master_send(c, &addr_adc_sat, 1);
+	i2c_master_recv(c, &adc_sat, 1);
+	i2c_master_send(c, &addr_agc_stat, 1);
+	i2c_master_recv(c, &agc_stat, 1);
+	i2c_master_send(c, &addr_pll_stat, 1);
+	i2c_master_recv(c, &pll_stat, 1);
+	if (pll_stat & 0x80)
+		tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
+	else
+		tuner_dbg("tda8290 not locked, no signal?\n");
+	if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat <20))) {
+		tuner_dbg("adjust gain, step 1. Agc: %d\n", agc_stat);
+		i2c_master_send(c, gainset_2, 2);
+		msleep(100);
+		i2c_master_send(c, &addr_agc_stat, 1);
+		i2c_master_recv(c, &agc_stat, 1);
+		i2c_master_send(c, &addr_pll_stat, 1);
+		i2c_master_recv(c, &pll_stat, 1);
+		if ((agc_stat > 115) || !(pll_stat & 0x80)) {
+			tuner_dbg("adjust gain, step 2. Agc: %d\n", agc_stat);
+			if (t->tda827x_ver != 0)
+				tda827xa_agcf(c);
+			else
+				tda827x_agcf(c);
+			msleep(100);
+			i2c_master_send(c, &addr_agc_stat, 1);
+			i2c_master_recv(c, &agc_stat, 1);
+			i2c_master_send(c, &addr_pll_stat, 1);
+			i2c_master_recv(c, &pll_stat, 1);
+			if((agc_stat > 115) || !(pll_stat & 0x80)) {
+				tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
+				i2c_master_send(c, adc_head_12, 2);
+				i2c_master_send(c, pll_bw_low, 2);
+				msleep(100);
+			}
+		}
+	}
 
-	if (t->mode == V4L2_TUNER_RADIO)
-		freq = freq / 1000;
+	/* l/ l' deadlock? */
+	if(t->tda8290_easy_mode & 0x60) {
+		i2c_master_send(c, &addr_adc_sat, 1);
+		i2c_master_recv(c, &adc_sat, 1);
+		i2c_master_send(c, &addr_pll_stat, 1);
+		i2c_master_recv(c, &pll_stat, 1);
+		if ((adc_sat > 20) || !(pll_stat & 0x80)) {
+			i2c_master_send(c, agc_rst_on, 2);
+			msleep(40);
+			i2c_master_send(c, agc_rst_off, 2);
+		}
+	}
 
-	N = (((freq<<3)+ifc)&0x3fffc);
-
-	N = N >> get_freq_entry(div_table, freq);
-	t->i2c_set_freq[0] = 0;
-	t->i2c_set_freq[1] = (unsigned char)(N>>8);
-	t->i2c_set_freq[2] = (unsigned char) N;
-	t->i2c_set_freq[3] = 0x40;
-	t->i2c_set_freq[4] = 0x52;
-	t->i2c_set_freq[5] = get_freq_entry(band_table, freq);
-	t->i2c_set_freq[6] = get_freq_entry(agc_table,  freq);
-	t->i2c_set_freq[7] = 0x8f;
+	tda8290_i2c_bridge(c, 0);
+	i2c_master_send(c, if_agc_set, 2);
+	return 0;
 }
 
+
+/*---------------------------------------------------------------------*/
+
 #define V4L2_STD_MN	(V4L2_STD_PAL_M|V4L2_STD_PAL_N|V4L2_STD_PAL_Nc|V4L2_STD_NTSC)
 #define V4L2_STD_B	(V4L2_STD_PAL_B|V4L2_STD_PAL_B1|V4L2_STD_SECAM_B)
 #define V4L2_STD_GH	(V4L2_STD_PAL_G|V4L2_STD_PAL_H|V4L2_STD_SECAM_G|V4L2_STD_SECAM_H)
@@ -179,26 +404,27 @@ static void set_frequency(struct tuner *t, u16 ifc, unsigned int freq)
 
 static void set_audio(struct tuner *t)
 {
-	t->i2c_easy_mode[0] = 0x01;
+	t->tda827x_lpsel = 0;
 
 	if (t->std & V4L2_STD_MN) {
-		t->sgIF = 736;
-		t->i2c_easy_mode[1] = 0x01;
+		t->sgIF = 92;
+		t->tda8290_easy_mode = 0x01;
+		t->tda827x_lpsel = 1;
 	} else if (t->std & V4L2_STD_B) {
-		t->sgIF = 864;
-		t->i2c_easy_mode[1] = 0x02;
+		t->sgIF = 108;
+		t->tda8290_easy_mode = 0x02;
 	} else if (t->std & V4L2_STD_GH) {
-		t->sgIF = 992;
-		t->i2c_easy_mode[1] = 0x04;
+		t->sgIF = 124;
+		t->tda8290_easy_mode = 0x04;
 	} else if (t->std & V4L2_STD_PAL_I) {
-		t->sgIF = 992;
-		t->i2c_easy_mode[1] = 0x08;
+		t->sgIF = 124;
+		t->tda8290_easy_mode = 0x08;
 	} else if (t->std & V4L2_STD_DK) {
-		t->sgIF = 992;
-		t->i2c_easy_mode[1] = 0x10;
+		t->sgIF = 124;
+		t->tda8290_easy_mode = 0x10;
 	} else if (t->std & V4L2_STD_SECAM_L) {
-		t->sgIF = 992;
-		t->i2c_easy_mode[1] = 0x20;
+		t->sgIF = 124;
+		t->tda8290_easy_mode = 0x20;
 	}
 }
 
@@ -207,15 +433,13 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
 	struct tuner *t = i2c_get_clientdata(c);
 
 	set_audio(t);
-	set_frequency(t, t->sgIF, freq);
-	tda8290_tune(c);
+	tda8290_tune(c, t->sgIF, freq);
 }
 
 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
 {
-	struct tuner *t = i2c_get_clientdata(c);
-	set_frequency(t, 704, freq);
-	tda8290_tune(c);
+	/* if frequency is 5.5 MHz */
+	tda8290_tune(c, 88, freq);
 }
 
 static int has_signal(struct i2c_client *c)
@@ -228,24 +452,118 @@ static int has_signal(struct i2c_client *c)
 	return (afc & 0x80)? 65535:0;
 }
 
+/*---------------------------------------------------------------------*/
+
 static void standby(struct i2c_client *c)
 {
-	i2c_transfer(c->adapter, i2c_msg_standby, ARRAY_SIZE(i2c_msg_standby));
+	struct tuner *t = i2c_get_clientdata(c);
+	unsigned char cb1[] = { 0x30, 0xD0 };
+	unsigned char tda8290_standby[] = { 0x00, 0x02 };
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
+
+	tda8290_i2c_bridge(c, 1);
+	if (t->tda827x_ver != 0)
+		cb1[1] = 0x90;
+	i2c_transfer(c->adapter, &msg, 1);
+	tda8290_i2c_bridge(c, 0);
+	i2c_master_send(c, tda8290_standby, 2);
 }
 
-int tda8290_init(struct i2c_client *c)
+
+static void tda8290_init_if(struct i2c_client *c)
+{
+	unsigned char set_VS[] = { 0x30, 0x6F };
+	unsigned char set_GP01_CF[] = { 0x20, 0x0B };
+
+	i2c_master_send(c, set_VS, 2);
+	i2c_master_send(c, set_GP01_CF, 2);
+}
+
+static void tda8290_init_tuner(struct i2c_client *c)
 {
 	struct tuner *t = i2c_get_clientdata(c);
+	unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
+				          0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
+	unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
+				          0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
+	struct i2c_msg msg = {.addr = t->tda827x_addr, .flags=0,
+	                      .buf=tda8275_init, .len = 14};
+	if (t->tda827x_ver != 0)
+		msg.buf = tda8275a_init;
+
+	tda8290_i2c_bridge(c, 1);
+	i2c_transfer(c->adapter, &msg, 1);
+	tda8290_i2c_bridge(c, 0);
+}
+
+/*---------------------------------------------------------------------*/
 
-	strlcpy(c->name, "tda8290+75", sizeof(c->name));
+int tda8290_init(struct i2c_client *c)
+{
+	struct tuner *t = i2c_get_clientdata(c);
+	u8 data;
+	int i, ret, tuners_found;
+	u32 tuner_addrs;
+	struct i2c_msg msg = {.flags=I2C_M_RD, .buf=&data, .len = 1};
+
+	tda8290_i2c_bridge(c, 1);
+	/* probe for tuner chip */
+	tuners_found = 0;
+	tuner_addrs = 0;
+	for (i=0x60; i<= 0x63; i++) {
+		msg.addr = i;
+		ret = i2c_transfer(c->adapter, &msg, 1);
+		if (ret == 1) {
+			tuners_found++;
+			tuner_addrs = (tuner_addrs << 8) + i;
+		}
+	}
+	/* if there is more than one tuner, we expect the right one is
+	   behind the bridge and we choose the highest address that doesn't
+	   give a response now
+	 */
+	tda8290_i2c_bridge(c, 0);
+	if(tuners_found > 1)
+		for (i = 0; i < tuners_found; i++) {
+			msg.addr = tuner_addrs  & 0xff;
+			ret = i2c_transfer(c->adapter, &msg, 1);
+			if(ret == 1)
+				tuner_addrs = tuner_addrs >> 8;
+			else
+				break;
+		}
+	if (tuner_addrs == 0) {
+		tuner_addrs = 0x61;
+		tuner_info ("could not clearly identify tuner address, defaulting to %x\n",
+		             tuner_addrs);
+	} else {
+		tuner_addrs = tuner_addrs & 0xff;
+		tuner_info ("setting tuner address to %x\n", tuner_addrs);
+	}
+	t->tda827x_addr = tuner_addrs;
+	msg.addr = tuner_addrs;
+
+	tda8290_i2c_bridge(c, 1);
+	ret = i2c_transfer(c->adapter, &msg, 1);
+	if( ret != 1)
+		tuner_warn ("TDA827x access failed!\n");
+	if ((data & 0x3c) == 0) {
+		strlcpy(c->name, "tda8290+75", sizeof(c->name));
+		t->tda827x_ver = 0;
+	} else {
+		strlcpy(c->name, "tda8290+75a", sizeof(c->name));
+		t->tda827x_ver = 2;
+	}
 	tuner_info("tuner: type set to %s\n", c->name);
+
 	t->tv_freq    = set_tv_freq;
 	t->radio_freq = set_radio_freq;
 	t->has_signal = has_signal;
 	t->standby = standby;
+	t->tda827x_lpsel = 0;
 
-	i2c_master_send(c, i2c_enable_bridge, ARRAY_SIZE(i2c_enable_bridge));
-	i2c_transfer(c->adapter, i2c_msg_init, ARRAY_SIZE(i2c_msg_init));
+	tda8290_init_tuner(c);
+	tda8290_init_if(c);
 	return 0;
 }