225 lines
6.7 KiB
C
225 lines
6.7 KiB
C
/*
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* $Id: tda8290.c,v 1.7 2005/03/07 12:01:51 kraxel Exp $
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*
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* i2c tv tuner chip device driver
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* controls the philips tda8290+75 tuner chip combo.
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*/
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#include <linux/i2c.h>
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#include <linux/videodev.h>
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#include <linux/delay.h>
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#include <media/tuner.h>
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/* ---------------------------------------------------------------------- */
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struct freq_entry {
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u16 freq;
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u8 value;
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};
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static struct freq_entry band_table[] = {
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{ 0x2DF4, 0x1C },
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{ 0x2574, 0x14 },
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{ 0x22B4, 0x0C },
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{ 0x20D4, 0x0B },
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{ 0x1E74, 0x3B },
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{ 0x1C34, 0x33 },
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{ 0x16F4, 0x5B },
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{ 0x1454, 0x53 },
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{ 0x12D4, 0x52 },
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{ 0x1034, 0x4A },
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{ 0x0EE4, 0x7A },
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{ 0x0D34, 0x72 },
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{ 0x0B54, 0x9A },
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{ 0x0914, 0x91 },
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{ 0x07F4, 0x89 },
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{ 0x0774, 0xB9 },
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{ 0x067B, 0xB1 },
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{ 0x0634, 0xD9 },
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{ 0x05A4, 0xD8 }, // FM radio
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{ 0x0494, 0xD0 },
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{ 0x03BC, 0xC8 },
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{ 0x0394, 0xF8 }, // 57250000 Hz
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{ 0x0000, 0xF0 }, // 0
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};
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static struct freq_entry div_table[] = {
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{ 0x1C34, 3 },
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{ 0x0D34, 2 },
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{ 0x067B, 1 },
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{ 0x0000, 0 },
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};
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static struct freq_entry agc_table[] = {
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{ 0x22B4, 0x8F },
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{ 0x0B54, 0x9F },
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{ 0x09A4, 0x8F },
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{ 0x0554, 0x9F },
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{ 0x0000, 0xBF },
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};
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static __u8 get_freq_entry( struct freq_entry* table, __u16 freq)
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{
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while(table->freq && table->freq > freq)
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table++;
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return table->value;
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}
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/* ---------------------------------------------------------------------- */
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static unsigned char i2c_enable_bridge[2] = { 0x21, 0xC0 };
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static unsigned char i2c_disable_bridge[2] = { 0x21, 0x80 };
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static unsigned char i2c_init_tda8275[14] = { 0x00, 0x00, 0x00, 0x00,
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0x7C, 0x04, 0xA3, 0x3F,
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0x2A, 0x04, 0xFF, 0x00,
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0x00, 0x40 };
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static unsigned char i2c_set_VS[2] = { 0x30, 0x6F };
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static unsigned char i2c_set_GP01_CF[2] = { 0x20, 0x0B };
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static unsigned char i2c_tda8290_reset[2] = { 0x00, 0x00 };
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static unsigned char i2c_gainset_off[2] = { 0x28, 0x14 };
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static unsigned char i2c_gainset_on[2] = { 0x28, 0x54 };
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static unsigned char i2c_agc3_00[2] = { 0x80, 0x00 };
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static unsigned char i2c_agc2_BF[2] = { 0x60, 0xBF };
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static unsigned char i2c_cb1_D2[2] = { 0x30, 0xD2 };
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static unsigned char i2c_cb1_56[2] = { 0x30, 0x56 };
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static unsigned char i2c_cb1_52[2] = { 0x30, 0x52 };
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static unsigned char i2c_cb1_50[2] = { 0x30, 0x50 };
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static unsigned char i2c_agc2_7F[2] = { 0x60, 0x7F };
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static unsigned char i2c_agc3_08[2] = { 0x80, 0x08 };
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static struct i2c_msg i2c_msg_init[] = {
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_init_tda8275), i2c_init_tda8275 },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_VS), i2c_set_VS },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_set_GP01_CF), i2c_set_GP01_CF },
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};
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static struct i2c_msg i2c_msg_prolog[] = {
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// { I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_easy_mode), i2c_easy_mode },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_off), i2c_gainset_off },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_tda8290_reset), i2c_tda8290_reset },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_enable_bridge), i2c_enable_bridge },
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};
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static struct i2c_msg i2c_msg_config[] = {
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// { I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_set_freq), i2c_set_freq },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_00), i2c_agc3_00 },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_BF), i2c_agc2_BF },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_D2), i2c_cb1_D2 },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_56), i2c_cb1_56 },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_52), i2c_cb1_52 },
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};
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static struct i2c_msg i2c_msg_epilog[] = {
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_cb1_50), i2c_cb1_50 },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc2_7F), i2c_agc2_7F },
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{ I2C_ADDR_TDA8275, 0, ARRAY_SIZE(i2c_agc3_08), i2c_agc3_08 },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_disable_bridge), i2c_disable_bridge },
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{ I2C_ADDR_TDA8290, 0, ARRAY_SIZE(i2c_gainset_on), i2c_gainset_on },
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};
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static int tda8290_tune(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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struct i2c_msg easy_mode =
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{ I2C_ADDR_TDA8290, 0, 2, t->i2c_easy_mode };
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struct i2c_msg set_freq =
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{ I2C_ADDR_TDA8275, 0, 8, t->i2c_set_freq };
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i2c_transfer(c->adapter, &easy_mode, 1);
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i2c_transfer(c->adapter, i2c_msg_prolog, ARRAY_SIZE(i2c_msg_prolog));
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i2c_transfer(c->adapter, &set_freq, 1);
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i2c_transfer(c->adapter, i2c_msg_config, ARRAY_SIZE(i2c_msg_config));
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msleep(550);
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i2c_transfer(c->adapter, i2c_msg_epilog, ARRAY_SIZE(i2c_msg_epilog));
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return 0;
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}
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static void set_frequency(struct tuner *t, u16 ifc)
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{
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u32 N = (((t->freq<<3)+ifc)&0x3fffc);
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N = N >> get_freq_entry(div_table, t->freq);
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t->i2c_set_freq[0] = 0;
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t->i2c_set_freq[1] = (unsigned char)(N>>8);
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t->i2c_set_freq[2] = (unsigned char) N;
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t->i2c_set_freq[3] = 0x40;
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t->i2c_set_freq[4] = 0x52;
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t->i2c_set_freq[5] = get_freq_entry(band_table, t->freq);
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t->i2c_set_freq[6] = get_freq_entry(agc_table, t->freq);
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t->i2c_set_freq[7] = 0x8f;
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}
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#define V4L2_STD_MN (V4L2_STD_PAL_M|V4L2_STD_PAL_N|V4L2_STD_PAL_Nc|V4L2_STD_NTSC)
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#define V4L2_STD_B (V4L2_STD_PAL_B|V4L2_STD_PAL_B1|V4L2_STD_SECAM_B)
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#define V4L2_STD_GH (V4L2_STD_PAL_G|V4L2_STD_PAL_H|V4L2_STD_SECAM_G|V4L2_STD_SECAM_H)
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#define V4L2_STD_DK (V4L2_STD_PAL_DK|V4L2_STD_SECAM_DK)
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static void set_audio(struct tuner *t)
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{
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t->i2c_easy_mode[0] = 0x01;
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if (t->std & V4L2_STD_MN)
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t->i2c_easy_mode[1] = 0x01;
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else if (t->std & V4L2_STD_B)
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t->i2c_easy_mode[1] = 0x02;
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else if (t->std & V4L2_STD_GH)
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t->i2c_easy_mode[1] = 0x04;
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else if (t->std & V4L2_STD_PAL_I)
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t->i2c_easy_mode[1] = 0x08;
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else if (t->std & V4L2_STD_DK)
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t->i2c_easy_mode[1] = 0x10;
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else if (t->std & V4L2_STD_SECAM_L)
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t->i2c_easy_mode[1] = 0x20;
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}
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static void set_tv_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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set_audio(t);
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set_frequency(t, 864);
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tda8290_tune(c);
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}
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static void set_radio_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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set_frequency(t, 704);
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tda8290_tune(c);
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}
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static int has_signal(struct i2c_client *c)
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{
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unsigned char i2c_get_afc[1] = { 0x1B };
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unsigned char afc = 0;
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i2c_master_send(c, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
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i2c_master_recv(c, &afc, 1);
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return (afc & 0x80)? 65535:0;
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}
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int tda8290_init(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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strlcpy(c->name, "tda8290+75", sizeof(c->name));
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tuner_info("tuner: type set to %s\n", c->name);
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t->tv_freq = set_tv_freq;
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t->radio_freq = set_radio_freq;
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t->has_signal = has_signal;
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i2c_master_send(c, i2c_enable_bridge, ARRAY_SIZE(i2c_enable_bridge));
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i2c_transfer(c->adapter, i2c_msg_init, ARRAY_SIZE(i2c_msg_init));
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return 0;
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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