diff options
Diffstat (limited to 'drivers/media/video/tda8290.c')
| -rw-r--r-- | drivers/media/video/tda8290.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/media/video/tda8290.c b/drivers/media/video/tda8290.c new file mode 100644 index 00000000000..b27cc348d95 --- /dev/null +++ b/drivers/media/video/tda8290.c @@ -0,0 +1,224 @@ +/* + * $Id: tda8290.c,v 1.7 2005/03/07 12:01:51 kraxel Exp $ + * + * i2c tv tuner chip device driver + * controls the philips tda8290+75 tuner chip combo. + */ +#include <linux/i2c.h> +#include <linux/videodev.h> +#include <linux/delay.h> +#include <media/tuner.h> + +/* ---------------------------------------------------------------------- */ + +struct freq_entry { + u16 freq; + u8 value; +}; + +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 +}; + +static struct freq_entry div_table[] = { + { 0x1C34, 3 }, + { 0x0D34, 2 }, + { 0x067B, 1 }, + { 0x0000, 0 }, +}; + +static struct freq_entry agc_table[] = { + { 0x22B4, 0x8F }, + { 0x0B54, 0x9F }, + { 0x09A4, 0x8F }, + { 0x0554, 0x9F }, + { 0x0000, 0xBF }, +}; + +static __u8 get_freq_entry( struct freq_entry* table, __u16 freq) +{ + while(table->freq && table->freq > freq) + table++; + return table->value; +} + +/* ---------------------------------------------------------------------- */ + +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, + 0x7C, 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_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_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 }; + +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 }, +}; + +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 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 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 }, +}; + +static int tda8290_tune(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)); + + 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 set_frequency(struct tuner *t, u16 ifc) +{ + u32 N = (((t->freq<<3)+ifc)&0x3fffc); + + N = N >> get_freq_entry(div_table, t->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, t->freq); + t->i2c_set_freq[6] = get_freq_entry(agc_table, t->freq); + t->i2c_set_freq[7] = 0x8f; +} + +#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) +#define V4L2_STD_DK (V4L2_STD_PAL_DK|V4L2_STD_SECAM_DK) + +static void set_audio(struct tuner *t) +{ + t->i2c_easy_mode[0] = 0x01; + + if (t->std & V4L2_STD_MN) + t->i2c_easy_mode[1] = 0x01; + else if (t->std & V4L2_STD_B) + t->i2c_easy_mode[1] = 0x02; + else if (t->std & V4L2_STD_GH) + t->i2c_easy_mode[1] = 0x04; + else if (t->std & V4L2_STD_PAL_I) + t->i2c_easy_mode[1] = 0x08; + else if (t->std & V4L2_STD_DK) + t->i2c_easy_mode[1] = 0x10; + else if (t->std & V4L2_STD_SECAM_L) + t->i2c_easy_mode[1] = 0x20; +} + +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, 864); + tda8290_tune(c); +} + +static void set_radio_freq(struct i2c_client *c, unsigned int freq) +{ + struct tuner *t = i2c_get_clientdata(c); + set_frequency(t, 704); + tda8290_tune(c); +} + +static int has_signal(struct i2c_client *c) +{ + unsigned char i2c_get_afc[1] = { 0x1B }; + unsigned char afc = 0; + + i2c_master_send(c, i2c_get_afc, ARRAY_SIZE(i2c_get_afc)); + i2c_master_recv(c, &afc, 1); + return (afc & 0x80)? 65535:0; +} + +int tda8290_init(struct i2c_client *c) +{ + struct tuner *t = i2c_get_clientdata(c); + + strlcpy(c->name, "tda8290+75", sizeof(c->name)); + 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; + + i2c_master_send(c, i2c_enable_bridge, ARRAY_SIZE(i2c_enable_bridge)); + i2c_transfer(c->adapter, i2c_msg_init, ARRAY_SIZE(i2c_msg_init)); + return 0; +} + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * --------------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |