drivers/media/video/tda8290.c

   1 /*
   2  * $Id: tda8290.c,v 1.7 2005/03/07 12:01:51 kraxel Exp $
   3  *
   4  * i2c tv tuner chip device driver
   5  * controls the philips tda8290+75 tuner chip combo.
   6  */
   7 #include <linux/i2c.h>
   8 #include <linux/videodev.h>
   9 #include <linux/delay.h>
  10 #include <media/tuner.h>
  11
  12 /* ---------------------------------------------------------------------- */
  13
  14 struct freq_entry {
  15         u16     freq;
  16         u8      value;
  17 };
  18
  19 static struct freq_entry band_table[] = {
  20         { 0x2DF4, 0x1C },
  21         { 0x2574, 0x14 },
  22         { 0x22B4, 0x0C },
  23         { 0x20D4, 0x0B },
  24         { 0x1E74, 0x3B },
  25         { 0x1C34, 0x33 },
  26         { 0x16F4, 0x5B },
  27         { 0x1454, 0x53 },
  28         { 0x12D4, 0x52 },
  29         { 0x1034, 0x4A },
  30         { 0x0EE4, 0x7A },
  31         { 0x0D34, 0x72 },
  32         { 0x0B54, 0x9A },
  33         { 0x0914, 0x91 },
  34         { 0x07F4, 0x89 },
  35         { 0x0774, 0xB9 },
  36         { 0x067B, 0xB1 },
  37         { 0x0634, 0xD9 },
  38         { 0x05A4, 0xD8 },       // FM radio
  39         { 0x0494, 0xD0 },
  40         { 0x03BC, 0xC8 },
  41         { 0x0394, 0xF8 },       // 57250000 Hz
  42         { 0x0000, 0xF0 },       // 0
  43 };
  44
  45 static struct freq_entry div_table[] = {
  46         { 0x1C34, 3 },
  47         { 0x0D34, 2 },
  48         { 0x067B, 1 },
  49         { 0x0000, 0 },
  50 };
  51
  52 static struct freq_entry agc_table[] = {
  53         { 0x22B4, 0x8F },
  54         { 0x0B54, 0x9F },
  55         { 0x09A4, 0x8F },
  56         { 0x0554, 0x9F },
  57         { 0x0000, 0xBF },
  58 };
  59
  60 static __u8 get_freq_entry( struct freq_entry* table, __u16 freq)
  61 {
  62         while(table->freq && table->freq > freq)
  63                 table++;
  64         return table->value;
  65 }
  66
  67 /* ---------------------------------------------------------------------- */
  68
  69 static unsigned char i2c_enable_bridge[2] =     { 0x21, 0xC0 };
  70 static unsigned char i2c_disable_bridge[2] =    { 0x21, 0x80 };
  71 static unsigned char i2c_init_tda8275[14] =     { 0x00, 0x00, 0x00, 0x00,
  72                                                   0x7C, 0x04, 0xA3, 0x3F,
  73                                                   0x2A, 0x04, 0xFF, 0x00,
  74                                                   0x00, 0x40 };
  75 static unsigned char i2c_set_VS[2] =            { 0x30, 0x6F };
  76 static unsigned char i2c_set_GP01_CF[2] =       { 0x20, 0x0B };
  77 static unsigned char i2c_tda8290_reset[2] =     { 0x00, 0x00 };
  78 static unsigned char i2c_gainset_off[2] =       { 0x28, 0x14 };
  79 static unsigned char i2c_gainset_on[2] =        { 0x28, 0x54 };
  80 static unsigned char i2c_agc3_00[2] =           { 0x80, 0x00 };
  81 static unsigned char i2c_agc2_BF[2] =           { 0x60, 0xBF };
  82 static unsigned char i2c_cb1_D2[2] =            { 0x30, 0xD2 };
  83 static unsigned char i2c_cb1_56[2] =            { 0x30, 0x56 };
  84 static unsigned char i2c_cb1_52[2] =            { 0x30, 0x52 };
  85 static unsigned char i2c_cb1_50[2] =            { 0x30, 0x50 };
  86 static unsigned char i2c_agc2_7F[2] =           { 0x60, 0x7F };
  87 static unsigned char i2c_agc3_08[2] =           { 0x80, 0x08 };
  88
  89 static struct i2c_msg i2c_msg_init[] = {
  90         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_init_tda8275), i2c_init_tda8275 },
  91         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
  92         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_VS), i2c_set_VS },
  93         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_GP01_CF), i2c_set_GP01_CF },
  94 };
  95
  96 static struct i2c_msg i2c_msg_prolog[] = {
  97 //      { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_easy_mode), i2c_easy_mode },
  98         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_off), i2c_gainset_off },
  99         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_reset), i2c_tda8290_reset },
 100         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
 101 };
 102
 103 static struct i2c_msg i2c_msg_config[] = {
 104 //      { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_set_freq), i2c_set_freq },
 105         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_00), i2c_agc3_00 },
 106         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_BF), i2c_agc2_BF },
 107         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D2), i2c_cb1_D2 },
 108         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_56), i2c_cb1_56 },
 109         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_52), i2c_cb1_52 },
 110 };
 111
 112 static struct i2c_msg i2c_msg_epilog[] = {
 113         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_50), i2c_cb1_50 },
 114         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_7F), i2c_agc2_7F },
 115         { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_08), i2c_agc3_08 },
 116         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
 117         { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_on), i2c_gainset_on },
 118 };
 119
 120 static int tda8290_tune(struct i2c_client *c)
 121 {
 122         struct tuner *t = i2c_get_clientdata(c);
 123         struct i2c_msg easy_mode =
 124                 { I2C_ADDR_TDA8290, 0, 2, t->i2c_easy_mode };
 125         struct i2c_msg set_freq =
 126                 { I2C_ADDR_TDA8275, 0, 8, t->i2c_set_freq  };
 127
 128         i2c_transfer(c->adapter, &easy_mode,      1);
 129         i2c_transfer(c->adapter, i2c_msg_prolog, ARRAY_SIZE(i2c_msg_prolog));
 130
 131         i2c_transfer(c->adapter, &set_freq,       1);
 132         i2c_transfer(c->adapter, i2c_msg_config, ARRAY_SIZE(i2c_msg_config));
 133
 134         msleep(550);
 135         i2c_transfer(c->adapter, i2c_msg_epilog, ARRAY_SIZE(i2c_msg_epilog));
 136         return 0;
 137 }
 138
 139 static void set_frequency(struct tuner *t, u16 ifc)
 140 {
 141         u32 N = (((t->freq<<3)+ifc)&0x3fffc);
 142
 143         N = N >> get_freq_entry(div_table, t->freq);
 144         t->i2c_set_freq[0] = 0;
 145         t->i2c_set_freq[1] = (unsigned char)(N>>8);
 146         t->i2c_set_freq[2] = (unsigned char) N;
 147         t->i2c_set_freq[3] = 0x40;
 148         t->i2c_set_freq[4] = 0x52;
 149         t->i2c_set_freq[5] = get_freq_entry(band_table, t->freq);
 150         t->i2c_set_freq[6] = get_freq_entry(agc_table,  t->freq);
 151         t->i2c_set_freq[7] = 0x8f;
 152 }
 153
 154 #define V4L2_STD_MN     (V4L2_STD_PAL_M|V4L2_STD_PAL_N|V4L2_STD_PAL_Nc|V4L2_STD_NTSC)
 155 #define V4L2_STD_B      (V4L2_STD_PAL_B|V4L2_STD_PAL_B1|V4L2_STD_SECAM_B)
 156 #define V4L2_STD_GH     (V4L2_STD_PAL_G|V4L2_STD_PAL_H|V4L2_STD_SECAM_G|V4L2_STD_SECAM_H)
 157 #define V4L2_STD_DK     (V4L2_STD_PAL_DK|V4L2_STD_SECAM_DK)
 158
 159 static void set_audio(struct tuner *t)
 160 {
 161         t->i2c_easy_mode[0] = 0x01;
 162
 163         if (t->std & V4L2_STD_MN)
 164                 t->i2c_easy_mode[1] = 0x01;
 165         else if (t->std & V4L2_STD_B)
 166                 t->i2c_easy_mode[1] = 0x02;
 167         else if (t->std & V4L2_STD_GH)
 168                 t->i2c_easy_mode[1] = 0x04;
 169         else if (t->std & V4L2_STD_PAL_I)
 170                 t->i2c_easy_mode[1] = 0x08;
 171         else if (t->std & V4L2_STD_DK)
 172                 t->i2c_easy_mode[1] = 0x10;
 173         else if (t->std & V4L2_STD_SECAM_L)
 174                 t->i2c_easy_mode[1] = 0x20;
 175 }
 176
 177 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
 178 {
 179         struct tuner *t = i2c_get_clientdata(c);
 180
 181         set_audio(t);
 182         set_frequency(t, 864);
 183         tda8290_tune(c);
 184 }
 185
 186 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
 187 {
 188         struct tuner *t = i2c_get_clientdata(c);
 189         set_frequency(t, 704);
 190         tda8290_tune(c);
 191 }
 192
 193 static int has_signal(struct i2c_client *c)
 194 {
 195         unsigned char i2c_get_afc[1] = { 0x1B };
 196         unsigned char afc = 0;
 197
 198         i2c_master_send(c, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 199         i2c_master_recv(c, &afc, 1);
 200         return (afc & 0x80)? 65535:0;
 201 }
 202
 203 int tda8290_init(struct i2c_client *c)
 204 {
 205         struct tuner *t = i2c_get_clientdata(c);
 206
 207         strlcpy(c->name, "tda8290+75", sizeof(c->name));
 208         tuner_info("tuner: type set to %s\n", c->name);
 209         t->tv_freq    = set_tv_freq;
 210         t->radio_freq = set_radio_freq;
 211         t->has_signal = has_signal;
 212
 213         i2c_master_send(c, i2c_enable_bridge, ARRAY_SIZE(i2c_enable_bridge));
 214         i2c_transfer(c->adapter, i2c_msg_init, ARRAY_SIZE(i2c_msg_init));
 215         return 0;
 216 }
 217
 218 /*
 219  * Overrides for Emacs so that we follow Linus's tabbing style.
 220  * ---------------------------------------------------------------------------
 221  * Local variables:
 222  * c-basic-offset: 8
 223  * End:
 224  */