diff options
Diffstat (limited to 'drivers/media/dvb/frontends/dib8000.c')
| -rw-r--r-- | drivers/media/dvb/frontends/dib8000.c | 126 |
1 files changed, 94 insertions, 32 deletions
diff --git a/drivers/media/dvb/frontends/dib8000.c b/drivers/media/dvb/frontends/dib8000.c index c1c3e26..7d2ea11 100644 --- a/drivers/media/dvb/frontends/dib8000.c +++ b/drivers/media/dvb/frontends/dib8000.c @@ -35,6 +35,8 @@ MODULE_PARM_DESC(debug, "turn on debugging (default: 0)"); struct i2c_device { struct i2c_adapter *adap; u8 addr; + u8 *i2c_write_buffer; + u8 *i2c_read_buffer; }; struct dib8000_state { @@ -70,6 +72,11 @@ struct dib8000_state { u32 status; struct dvb_frontend *fe[MAX_NUMBER_OF_FRONTENDS]; + + /* for the I2C transfer */ + struct i2c_msg msg[2]; + u8 i2c_write_buffer[4]; + u8 i2c_read_buffer[2]; }; enum dib8000_power_mode { @@ -79,22 +86,41 @@ enum dib8000_power_mode { static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg) { - u8 wb[2] = { reg >> 8, reg & 0xff }; - u8 rb[2]; struct i2c_msg msg[2] = { - {.addr = i2c->addr >> 1,.flags = 0,.buf = wb,.len = 2}, - {.addr = i2c->addr >> 1,.flags = I2C_M_RD,.buf = rb,.len = 2}, + {.addr = i2c->addr >> 1, .flags = 0, + .buf = i2c->i2c_write_buffer, .len = 2}, + {.addr = i2c->addr >> 1, .flags = I2C_M_RD, + .buf = i2c->i2c_read_buffer, .len = 2}, }; + msg[0].buf[0] = reg >> 8; + msg[0].buf[1] = reg & 0xff; + if (i2c_transfer(i2c->adap, msg, 2) != 2) dprintk("i2c read error on %d", reg); - return (rb[0] << 8) | rb[1]; + return (msg[1].buf[0] << 8) | msg[1].buf[1]; } static u16 dib8000_read_word(struct dib8000_state *state, u16 reg) { - return dib8000_i2c_read16(&state->i2c, reg); + state->i2c_write_buffer[0] = reg >> 8; + state->i2c_write_buffer[1] = reg & 0xff; + + memset(state->msg, 0, 2 * sizeof(struct i2c_msg)); + state->msg[0].addr = state->i2c.addr >> 1; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 2; + state->msg[1].addr = state->i2c.addr >> 1; + state->msg[1].flags = I2C_M_RD; + state->msg[1].buf = state->i2c_read_buffer; + state->msg[1].len = 2; + + if (i2c_transfer(state->i2c.adap, state->msg, 2) != 2) + dprintk("i2c read error on %d", reg); + + return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1]; } static u32 dib8000_read32(struct dib8000_state *state, u16 reg) @@ -109,19 +135,34 @@ static u32 dib8000_read32(struct dib8000_state *state, u16 reg) static int dib8000_i2c_write16(struct i2c_device *i2c, u16 reg, u16 val) { - u8 b[4] = { - (reg >> 8) & 0xff, reg & 0xff, - (val >> 8) & 0xff, val & 0xff, - }; - struct i2c_msg msg = { - .addr = i2c->addr >> 1,.flags = 0,.buf = b,.len = 4 - }; - return i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0; + struct i2c_msg msg = {.addr = i2c->addr >> 1, .flags = 0, + .buf = i2c->i2c_write_buffer, .len = 4}; + int ret = 0; + + msg.buf[0] = (reg >> 8) & 0xff; + msg.buf[1] = reg & 0xff; + msg.buf[2] = (val >> 8) & 0xff; + msg.buf[3] = val & 0xff; + + ret = i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0; + + return ret; } static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val) { - return dib8000_i2c_write16(&state->i2c, reg, val); + state->i2c_write_buffer[0] = (reg >> 8) & 0xff; + state->i2c_write_buffer[1] = reg & 0xff; + state->i2c_write_buffer[2] = (val >> 8) & 0xff; + state->i2c_write_buffer[3] = val & 0xff; + + memset(&state->msg[0], 0, sizeof(struct i2c_msg)); + state->msg[0].addr = state->i2c.addr >> 1; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 4; + + return i2c_transfer(state->i2c.adap, state->msg, 1) != 1 ? -EREMOTEIO : 0; } static const s16 coeff_2k_sb_1seg_dqpsk[8] = { @@ -980,30 +1021,31 @@ static void dib8000_update_timf(struct dib8000_state *state) dprintk("Updated timing frequency: %d (default: %d)", state->timf, state->timf_default); } +static const u16 adc_target_16dB[11] = { + (1 << 13) - 825 - 117, + (1 << 13) - 837 - 117, + (1 << 13) - 811 - 117, + (1 << 13) - 766 - 117, + (1 << 13) - 737 - 117, + (1 << 13) - 693 - 117, + (1 << 13) - 648 - 117, + (1 << 13) - 619 - 117, + (1 << 13) - 575 - 117, + (1 << 13) - 531 - 117, + (1 << 13) - 501 - 117 +}; +static const u8 permu_seg[] = { 6, 5, 7, 4, 8, 3, 9, 2, 10, 1, 11, 0, 12 }; + static void dib8000_set_channel(struct dib8000_state *state, u8 seq, u8 autosearching) { u16 mode, max_constellation, seg_diff_mask = 0, nbseg_diff = 0; u8 guard, crate, constellation, timeI; - u8 permu_seg[] = { 6, 5, 7, 4, 8, 3, 9, 2, 10, 1, 11, 0, 12 }; u16 i, coeff[4], P_cfr_left_edge = 0, P_cfr_right_edge = 0, seg_mask13 = 0x1fff; // All 13 segments enabled const s16 *ncoeff = NULL, *ana_fe; u16 tmcc_pow = 0; u16 coff_pow = 0x2800; u16 init_prbs = 0xfff; u16 ana_gain = 0; - u16 adc_target_16dB[11] = { - (1 << 13) - 825 - 117, - (1 << 13) - 837 - 117, - (1 << 13) - 811 - 117, - (1 << 13) - 766 - 117, - (1 << 13) - 737 - 117, - (1 << 13) - 693 - 117, - (1 << 13) - 648 - 117, - (1 << 13) - 619 - 117, - (1 << 13) - 575 - 117, - (1 << 13) - 531 - 117, - (1 << 13) - 501 - 117 - }; if (state->ber_monitored_layer != LAYER_ALL) dib8000_write_word(state, 285, (dib8000_read_word(state, 285) & 0x60) | state->ber_monitored_layer); @@ -2379,10 +2421,22 @@ EXPORT_SYMBOL(dib8000_get_slave_frontend); int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 default_addr, u8 first_addr) { - int k = 0; + int k = 0, ret = 0; u8 new_addr = 0; struct i2c_device client = {.adap = host }; + client.i2c_write_buffer = kzalloc(4 * sizeof(u8), GFP_KERNEL); + if (!client.i2c_write_buffer) { + dprintk("%s: not enough memory", __func__); + return -ENOMEM; + } + client.i2c_read_buffer = kzalloc(4 * sizeof(u8), GFP_KERNEL); + if (!client.i2c_read_buffer) { + dprintk("%s: not enough memory", __func__); + ret = -ENOMEM; + goto error_memory; + } + for (k = no_of_demods - 1; k >= 0; k--) { /* designated i2c address */ new_addr = first_addr + (k << 1); @@ -2394,7 +2448,8 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau client.addr = default_addr; if (dib8000_identify(&client) == 0) { dprintk("#%d: not identified", k); - return -EINVAL; + ret = -EINVAL; + goto error; } } @@ -2420,7 +2475,12 @@ int dib8000_i2c_enumeration(struct i2c_adapter *host, int no_of_demods, u8 defau dib8000_i2c_write16(&client, 1286, 0); } - return 0; +error: + kfree(client.i2c_read_buffer); +error_memory: + kfree(client.i2c_write_buffer); + + return ret; } EXPORT_SYMBOL(dib8000_i2c_enumeration); @@ -2519,6 +2579,8 @@ struct dvb_frontend *dib8000_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, s memcpy(&state->cfg, cfg, sizeof(struct dib8000_config)); state->i2c.adap = i2c_adap; state->i2c.addr = i2c_addr; + state->i2c.i2c_write_buffer = state->i2c_write_buffer; + state->i2c.i2c_read_buffer = state->i2c_read_buffer; state->gpio_val = cfg->gpio_val; state->gpio_dir = cfg->gpio_dir; |