diff options
Diffstat (limited to 'drivers/media/dvb-frontends/m88rs2000.c')
| -rw-r--r-- | drivers/media/dvb-frontends/m88rs2000.c | 919 |
1 files changed, 919 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/m88rs2000.c b/drivers/media/dvb-frontends/m88rs2000.c new file mode 100644 index 00000000000..633815ed90c --- /dev/null +++ b/drivers/media/dvb-frontends/m88rs2000.c @@ -0,0 +1,919 @@ +/* + Driver for M88RS2000 demodulator and tuner + + Copyright (C) 2012 Malcolm Priestley (tvboxspy@gmail.com) + Beta Driver + + Include various calculation code from DS3000 driver. + Copyright (C) 2009 Konstantin Dimitrov. + + 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/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/jiffies.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/types.h> + + +#include "dvb_frontend.h" +#include "m88rs2000.h" + +struct m88rs2000_state { + struct i2c_adapter *i2c; + const struct m88rs2000_config *config; + struct dvb_frontend frontend; + u8 no_lock_count; + u32 tuner_frequency; + u32 symbol_rate; + fe_code_rate_t fec_inner; + u8 tuner_level; + int errmode; +}; + +static int m88rs2000_debug; + +module_param_named(debug, m88rs2000_debug, int, 0644); +MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able))."); + +#define dprintk(level, args...) do { \ + if (level & m88rs2000_debug) \ + printk(KERN_DEBUG "m88rs2000-fe: " args); \ +} while (0) + +#define deb_info(args...) dprintk(0x01, args) +#define info(format, arg...) \ + printk(KERN_INFO "m88rs2000-fe: " format "\n" , ## arg) + +static int m88rs2000_writereg(struct m88rs2000_state *state, u8 tuner, + u8 reg, u8 data) +{ + int ret; + u8 addr = (tuner == 0) ? state->config->tuner_addr : + state->config->demod_addr; + u8 buf[] = { reg, data }; + struct i2c_msg msg = { + .addr = addr, + .flags = 0, + .buf = buf, + .len = 2 + }; + + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + deb_info("%s: writereg error (reg == 0x%02x, val == 0x%02x, " + "ret == %i)\n", __func__, reg, data, ret); + + return (ret != 1) ? -EREMOTEIO : 0; +} + +static int m88rs2000_demod_write(struct m88rs2000_state *state, u8 reg, u8 data) +{ + return m88rs2000_writereg(state, 1, reg, data); +} + +static int m88rs2000_tuner_write(struct m88rs2000_state *state, u8 reg, u8 data) +{ + m88rs2000_demod_write(state, 0x81, 0x84); + udelay(10); + return m88rs2000_writereg(state, 0, reg, data); + +} + +static int m88rs2000_write(struct dvb_frontend *fe, const u8 buf[], int len) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + + if (len != 2) + return -EINVAL; + + return m88rs2000_writereg(state, 1, buf[0], buf[1]); +} + +static u8 m88rs2000_readreg(struct m88rs2000_state *state, u8 tuner, u8 reg) +{ + int ret; + u8 b0[] = { reg }; + u8 b1[] = { 0 }; + u8 addr = (tuner == 0) ? state->config->tuner_addr : + state->config->demod_addr; + struct i2c_msg msg[] = { + { + .addr = addr, + .flags = 0, + .buf = b0, + .len = 1 + }, { + .addr = addr, + .flags = I2C_M_RD, + .buf = b1, + .len = 1 + } + }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) + deb_info("%s: readreg error (reg == 0x%02x, ret == %i)\n", + __func__, reg, ret); + + return b1[0]; +} + +static u8 m88rs2000_demod_read(struct m88rs2000_state *state, u8 reg) +{ + return m88rs2000_readreg(state, 1, reg); +} + +static u8 m88rs2000_tuner_read(struct m88rs2000_state *state, u8 reg) +{ + m88rs2000_demod_write(state, 0x81, 0x85); + udelay(10); + return m88rs2000_readreg(state, 0, reg); +} + +static int m88rs2000_set_symbolrate(struct dvb_frontend *fe, u32 srate) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + int ret; + u32 temp; + u8 b[3]; + + if ((srate < 1000000) || (srate > 45000000)) + return -EINVAL; + + temp = srate / 1000; + temp *= 11831; + temp /= 68; + temp -= 3; + + b[0] = (u8) (temp >> 16) & 0xff; + b[1] = (u8) (temp >> 8) & 0xff; + b[2] = (u8) temp & 0xff; + ret = m88rs2000_demod_write(state, 0x93, b[2]); + ret |= m88rs2000_demod_write(state, 0x94, b[1]); + ret |= m88rs2000_demod_write(state, 0x95, b[0]); + + deb_info("m88rs2000: m88rs2000_set_symbolrate\n"); + return ret; +} + +static int m88rs2000_send_diseqc_msg(struct dvb_frontend *fe, + struct dvb_diseqc_master_cmd *m) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + + int i; + u8 reg; + deb_info("%s\n", __func__); + m88rs2000_demod_write(state, 0x9a, 0x30); + reg = m88rs2000_demod_read(state, 0xb2); + reg &= 0x3f; + m88rs2000_demod_write(state, 0xb2, reg); + for (i = 0; i < m->msg_len; i++) + m88rs2000_demod_write(state, 0xb3 + i, m->msg[i]); + + reg = m88rs2000_demod_read(state, 0xb1); + reg &= 0x87; + reg |= ((m->msg_len - 1) << 3) | 0x07; + reg &= 0x7f; + m88rs2000_demod_write(state, 0xb1, reg); + + for (i = 0; i < 15; i++) { + if ((m88rs2000_demod_read(state, 0xb1) & 0x40) == 0x0) + break; + msleep(20); + } + + reg = m88rs2000_demod_read(state, 0xb1); + if ((reg & 0x40) > 0x0) { + reg &= 0x7f; + reg |= 0x40; + m88rs2000_demod_write(state, 0xb1, reg); + } + + reg = m88rs2000_demod_read(state, 0xb2); + reg &= 0x3f; + reg |= 0x80; + m88rs2000_demod_write(state, 0xb2, reg); + m88rs2000_demod_write(state, 0x9a, 0xb0); + + + return 0; +} + +static int m88rs2000_send_diseqc_burst(struct dvb_frontend *fe, + fe_sec_mini_cmd_t burst) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + u8 reg0, reg1; + deb_info("%s\n", __func__); + m88rs2000_demod_write(state, 0x9a, 0x30); + msleep(50); + reg0 = m88rs2000_demod_read(state, 0xb1); + reg1 = m88rs2000_demod_read(state, 0xb2); + /* TODO complete this section */ + m88rs2000_demod_write(state, 0xb2, reg1); + m88rs2000_demod_write(state, 0xb1, reg0); + m88rs2000_demod_write(state, 0x9a, 0xb0); + + return 0; +} + +static int m88rs2000_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + u8 reg0, reg1; + m88rs2000_demod_write(state, 0x9a, 0x30); + reg0 = m88rs2000_demod_read(state, 0xb1); + reg1 = m88rs2000_demod_read(state, 0xb2); + + reg1 &= 0x3f; + + switch (tone) { + case SEC_TONE_ON: + reg0 |= 0x4; + reg0 &= 0xbc; + break; + case SEC_TONE_OFF: + reg1 |= 0x80; + break; + default: + break; + } + m88rs2000_demod_write(state, 0xb2, reg1); + m88rs2000_demod_write(state, 0xb1, reg0); + m88rs2000_demod_write(state, 0x9a, 0xb0); + return 0; +} + +struct inittab { + u8 cmd; + u8 reg; + u8 val; +}; + +struct inittab m88rs2000_setup[] = { + {DEMOD_WRITE, 0x9a, 0x30}, + {DEMOD_WRITE, 0x00, 0x01}, + {WRITE_DELAY, 0x19, 0x00}, + {DEMOD_WRITE, 0x00, 0x00}, + {DEMOD_WRITE, 0x9a, 0xb0}, + {DEMOD_WRITE, 0x81, 0xc1}, + {TUNER_WRITE, 0x42, 0x73}, + {TUNER_WRITE, 0x05, 0x07}, + {TUNER_WRITE, 0x20, 0x27}, + {TUNER_WRITE, 0x07, 0x02}, + {TUNER_WRITE, 0x11, 0xff}, + {TUNER_WRITE, 0x60, 0xf9}, + {TUNER_WRITE, 0x08, 0x01}, + {TUNER_WRITE, 0x00, 0x41}, + {DEMOD_WRITE, 0x81, 0x81}, + {DEMOD_WRITE, 0x86, 0xc6}, + {DEMOD_WRITE, 0x9a, 0x30}, + {DEMOD_WRITE, 0xf0, 0x22}, + {DEMOD_WRITE, 0xf1, 0xbf}, + {DEMOD_WRITE, 0xb0, 0x45}, + {DEMOD_WRITE, 0xb2, 0x01}, /* set voltage pin always set 1*/ + {DEMOD_WRITE, 0x9a, 0xb0}, + {0xff, 0xaa, 0xff} +}; + +struct inittab m88rs2000_shutdown[] = { + {DEMOD_WRITE, 0x9a, 0x30}, + {DEMOD_WRITE, 0xb0, 0x00}, + {DEMOD_WRITE, 0xf1, 0x89}, + {DEMOD_WRITE, 0x00, 0x01}, + {DEMOD_WRITE, 0x9a, 0xb0}, + {TUNER_WRITE, 0x00, 0x40}, + {DEMOD_WRITE, 0x81, 0x81}, + {0xff, 0xaa, 0xff} +}; + +struct inittab tuner_reset[] = { + {TUNER_WRITE, 0x42, 0x73}, + {TUNER_WRITE, 0x05, 0x07}, + {TUNER_WRITE, 0x20, 0x27}, + {TUNER_WRITE, 0x07, 0x02}, + {TUNER_WRITE, 0x11, 0xff}, + {TUNER_WRITE, 0x60, 0xf9}, + {TUNER_WRITE, 0x08, 0x01}, + {TUNER_WRITE, 0x00, 0x41}, + {0xff, 0xaa, 0xff} +}; + +struct inittab fe_reset[] = { + {DEMOD_WRITE, 0x00, 0x01}, + {DEMOD_WRITE, 0xf1, 0xbf}, + {DEMOD_WRITE, 0x00, 0x01}, + {DEMOD_WRITE, 0x20, 0x81}, + {DEMOD_WRITE, 0x21, 0x80}, + {DEMOD_WRITE, 0x10, 0x33}, + {DEMOD_WRITE, 0x11, 0x44}, + {DEMOD_WRITE, 0x12, 0x07}, + {DEMOD_WRITE, 0x18, 0x20}, + {DEMOD_WRITE, 0x28, 0x04}, + {DEMOD_WRITE, 0x29, 0x8e}, + {DEMOD_WRITE, 0x3b, 0xff}, + {DEMOD_WRITE, 0x32, 0x10}, + {DEMOD_WRITE, 0x33, 0x02}, + {DEMOD_WRITE, 0x34, 0x30}, + {DEMOD_WRITE, 0x35, 0xff}, + {DEMOD_WRITE, 0x38, 0x50}, + {DEMOD_WRITE, 0x39, 0x68}, + {DEMOD_WRITE, 0x3c, 0x7f}, + {DEMOD_WRITE, 0x3d, 0x0f}, + {DEMOD_WRITE, 0x45, 0x20}, + {DEMOD_WRITE, 0x46, 0x24}, + {DEMOD_WRITE, 0x47, 0x7c}, + {DEMOD_WRITE, 0x48, 0x16}, + {DEMOD_WRITE, 0x49, 0x04}, + {DEMOD_WRITE, 0x4a, 0x01}, + {DEMOD_WRITE, 0x4b, 0x78}, + {DEMOD_WRITE, 0X4d, 0xd2}, + {DEMOD_WRITE, 0x4e, 0x6d}, + {DEMOD_WRITE, 0x50, 0x30}, + {DEMOD_WRITE, 0x51, 0x30}, + {DEMOD_WRITE, 0x54, 0x7b}, + {DEMOD_WRITE, 0x56, 0x09}, + {DEMOD_WRITE, 0x58, 0x59}, + {DEMOD_WRITE, 0x59, 0x37}, + {DEMOD_WRITE, 0x63, 0xfa}, + {0xff, 0xaa, 0xff} +}; + +struct inittab fe_trigger[] = { + {DEMOD_WRITE, 0x97, 0x04}, + {DEMOD_WRITE, 0x99, 0x77}, + {DEMOD_WRITE, 0x9b, 0x64}, + {DEMOD_WRITE, 0x9e, 0x00}, + {DEMOD_WRITE, 0x9f, 0xf8}, + {DEMOD_WRITE, 0xa0, 0x20}, + {DEMOD_WRITE, 0xa1, 0xe0}, + {DEMOD_WRITE, 0xa3, 0x38}, + {DEMOD_WRITE, 0x98, 0xff}, + {DEMOD_WRITE, 0xc0, 0x0f}, + {DEMOD_WRITE, 0x89, 0x01}, + {DEMOD_WRITE, 0x00, 0x00}, + {WRITE_DELAY, 0x0a, 0x00}, + {DEMOD_WRITE, 0x00, 0x01}, + {DEMOD_WRITE, 0x00, 0x00}, + {DEMOD_WRITE, 0x9a, 0xb0}, + {0xff, 0xaa, 0xff} +}; + +static int m88rs2000_tab_set(struct m88rs2000_state *state, + struct inittab *tab) +{ + int ret = 0; + u8 i; + if (tab == NULL) + return -EINVAL; + + for (i = 0; i < 255; i++) { + switch (tab[i].cmd) { + case 0x01: + ret = m88rs2000_demod_write(state, tab[i].reg, + tab[i].val); + break; + case 0x02: + ret = m88rs2000_tuner_write(state, tab[i].reg, + tab[i].val); + break; + case 0x10: + if (tab[i].reg > 0) + mdelay(tab[i].reg); + break; + case 0xff: + if (tab[i].reg == 0xaa && tab[i].val == 0xff) + return 0; + case 0x00: + break; + default: + return -EINVAL; + } + if (ret < 0) + return -ENODEV; + } + return 0; +} + +static int m88rs2000_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + u8 data; + + data = m88rs2000_demod_read(state, 0xb2); + data |= 0x03; /* bit0 V/H, bit1 off/on */ + + switch (volt) { + case SEC_VOLTAGE_18: + data &= ~0x03; + break; + case SEC_VOLTAGE_13: + data &= ~0x03; + data |= 0x01; + break; + case SEC_VOLTAGE_OFF: + break; + } + + m88rs2000_demod_write(state, 0xb2, data); + + return 0; +} + +static int m88rs2000_startup(struct m88rs2000_state *state) +{ + int ret = 0; + u8 reg; + + reg = m88rs2000_tuner_read(state, 0x00); + if ((reg & 0x40) == 0) + ret = -ENODEV; + + return ret; +} + +static int m88rs2000_init(struct dvb_frontend *fe) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + int ret; + + deb_info("m88rs2000: init chip\n"); + /* Setup frontend from shutdown/cold */ + ret = m88rs2000_tab_set(state, m88rs2000_setup); + + return ret; +} + +static int m88rs2000_sleep(struct dvb_frontend *fe) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + int ret; + /* Shutdown the frondend */ + ret = m88rs2000_tab_set(state, m88rs2000_shutdown); + return ret; +} + +static int m88rs2000_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + u8 reg = m88rs2000_demod_read(state, 0x8c); + + *status = 0; + + if ((reg & 0x7) == 0x7) { + *status = FE_HAS_CARRIER | FE_HAS_SIGNAL | FE_HAS_VITERBI + | FE_HAS_SYNC | FE_HAS_LOCK; + if (state->config->set_ts_params) + state->config->set_ts_params(fe, CALL_IS_READ); + } + return 0; +} + +/* Extact code for these unknown but lmedm04 driver uses interupt callbacks */ + +static int m88rs2000_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + deb_info("m88rs2000_read_ber %d\n", *ber); + *ber = 0; + return 0; +} + +static int m88rs2000_read_signal_strength(struct dvb_frontend *fe, + u16 *strength) +{ + *strength = 0; + return 0; +} + +static int m88rs2000_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + deb_info("m88rs2000_read_snr %d\n", *snr); + *snr = 0; + return 0; +} + +static int m88rs2000_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + deb_info("m88rs2000_read_ber %d\n", *ucblocks); + *ucblocks = 0; + return 0; +} + +static int m88rs2000_tuner_gate_ctrl(struct m88rs2000_state *state, u8 offset) +{ + int ret; + ret = m88rs2000_tuner_write(state, 0x51, 0x1f - offset); + ret |= m88rs2000_tuner_write(state, 0x51, 0x1f); + ret |= m88rs2000_tuner_write(state, 0x50, offset); + ret |= m88rs2000_tuner_write(state, 0x50, 0x00); + msleep(20); + return ret; +} + +static int m88rs2000_set_tuner_rf(struct dvb_frontend *fe) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + int reg; + reg = m88rs2000_tuner_read(state, 0x3d); + reg &= 0x7f; + if (reg < 0x16) + reg = 0xa1; + else if (reg == 0x16) + reg = 0x99; + else + reg = 0xf9; + + m88rs2000_tuner_write(state, 0x60, reg); + reg = m88rs2000_tuner_gate_ctrl(state, 0x08); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + return reg; +} + +static int m88rs2000_set_tuner(struct dvb_frontend *fe, u16 *offset) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct m88rs2000_state *state = fe->demodulator_priv; + int ret; + u32 frequency = c->frequency; + s32 offset_khz; + s32 tmp; + u32 symbol_rate = (c->symbol_rate / 1000); + u32 f3db, gdiv28; + u16 value, ndiv, lpf_coeff; + u8 lpf_mxdiv, mlpf_max, mlpf_min, nlpf; + u8 lo = 0x01, div4 = 0x0; + + /* Reset Tuner */ + ret = m88rs2000_tab_set(state, tuner_reset); + + /* Calculate frequency divider */ + if (frequency < 1060000) { + lo |= 0x10; + div4 = 0x1; + ndiv = (frequency * 14 * 4) / FE_CRYSTAL_KHZ; + } else + ndiv = (frequency * 14 * 2) / FE_CRYSTAL_KHZ; + ndiv = ndiv + ndiv % 2; + ndiv = ndiv - 1024; + + ret = m88rs2000_tuner_write(state, 0x10, 0x80 | lo); + + /* Set frequency divider */ + ret |= m88rs2000_tuner_write(state, 0x01, (ndiv >> 8) & 0xf); + ret |= m88rs2000_tuner_write(state, 0x02, ndiv & 0xff); + + ret |= m88rs2000_tuner_write(state, 0x03, 0x06); + ret |= m88rs2000_tuner_gate_ctrl(state, 0x10); + if (ret < 0) + return -ENODEV; + + /* Tuner Frequency Range */ + ret = m88rs2000_tuner_write(state, 0x10, lo); + + ret |= m88rs2000_tuner_gate_ctrl(state, 0x08); + + /* Tuner RF */ + ret |= m88rs2000_set_tuner_rf(fe); + + gdiv28 = (FE_CRYSTAL_KHZ / 1000 * 1694 + 500) / 1000; + ret |= m88rs2000_tuner_write(state, 0x04, gdiv28 & 0xff); + ret |= m88rs2000_tuner_gate_ctrl(state, 0x04); + if (ret < 0) + return -ENODEV; + + value = m88rs2000_tuner_read(state, 0x26); + + f3db = (symbol_rate * 135) / 200 + 2000; + f3db += FREQ_OFFSET_LOW_SYM_RATE; + if (f3db < 7000) + f3db = 7000; + if (f3db > 40000) + f3db = 40000; + + gdiv28 = gdiv28 * 207 / (value * 2 + 151); + mlpf_max = gdiv28 * 135 / 100; + mlpf_min = gdiv28 * 78 / 100; + if (mlpf_max > 63) + mlpf_max = 63; + + lpf_coeff = 2766; + + nlpf = (f3db * gdiv28 * 2 / lpf_coeff / + (FE_CRYSTAL_KHZ / 1000) + 1) / 2; + if (nlpf > 23) + nlpf = 23; + if (nlpf < 1) + nlpf = 1; + + lpf_mxdiv = (nlpf * (FE_CRYSTAL_KHZ / 1000) + * lpf_coeff * 2 / f3db + 1) / 2; + + if (lpf_mxdiv < mlpf_min) { + nlpf++; + lpf_mxdiv = (nlpf * (FE_CRYSTAL_KHZ / 1000) + * lpf_coeff * 2 / f3db + 1) / 2; + } + + if (lpf_mxdiv > mlpf_max) + lpf_mxdiv = mlpf_max; + + ret = m88rs2000_tuner_write(state, 0x04, lpf_mxdiv); + ret |= m88rs2000_tuner_write(state, 0x06, nlpf); + + ret |= m88rs2000_tuner_gate_ctrl(state, 0x04); + + ret |= m88rs2000_tuner_gate_ctrl(state, 0x01); + + msleep(80); + /* calculate offset assuming 96000kHz*/ + offset_khz = (ndiv - ndiv % 2 + 1024) * FE_CRYSTAL_KHZ + / 14 / (div4 + 1) / 2; + + offset_khz -= frequency; + + tmp = offset_khz; + tmp *= 65536; + + tmp = (2 * tmp + 96000) / (2 * 96000); + if (tmp < 0) + tmp += 65536; + + *offset = tmp & 0xffff; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return (ret < 0) ? -EINVAL : 0; +} + +static int m88rs2000_set_fec(struct m88rs2000_state *state, + fe_code_rate_t fec) +{ + u16 fec_set; + switch (fec) { + /* This is not confirmed kept for reference */ +/* case FEC_1_2: + fec_set = 0x88; + break; + case FEC_2_3: + fec_set = 0x68; + break; + case FEC_3_4: + fec_set = 0x48; + break; + case FEC_5_6: + fec_set = 0x28; + break; + case FEC_7_8: + fec_set = 0x18; + break; */ + case FEC_AUTO: + default: + fec_set = 0x08; + } + m88rs2000_demod_write(state, 0x76, fec_set); + + return 0; +} + + +static fe_code_rate_t m88rs2000_get_fec(struct m88rs2000_state *state) +{ + u8 reg; + m88rs2000_demod_write(state, 0x9a, 0x30); + reg = m88rs2000_demod_read(state, 0x76); + m88rs2000_demod_write(state, 0x9a, 0xb0); + + switch (reg) { + case 0x88: + return FEC_1_2; + case 0x68: + return FEC_2_3; + case 0x48: + return FEC_3_4; + case 0x28: + return FEC_5_6; + case 0x18: + return FEC_7_8; + case 0x08: + default: + break; + } + + return FEC_AUTO; +} + +static int m88rs2000_set_frontend(struct dvb_frontend *fe) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + fe_status_t status; + int i, ret; + u16 offset = 0; + u8 reg; + + state->no_lock_count = 0; + + if (c->delivery_system != SYS_DVBS) { + deb_info("%s: unsupported delivery " + "system selected (%d)\n", + __func__, c->delivery_system); + return -EOPNOTSUPP; + } + + /* Set Tuner */ + ret = m88rs2000_set_tuner(fe, &offset); + if (ret < 0) + return -ENODEV; + + ret = m88rs2000_demod_write(state, 0x9a, 0x30); + /* Unknown usually 0xc6 sometimes 0xc1 */ + reg = m88rs2000_demod_read(state, 0x86); + ret |= m88rs2000_demod_write(state, 0x86, reg); + /* Offset lower nibble always 0 */ + ret |= m88rs2000_demod_write(state, 0x9c, (offset >> 8)); + ret |= m88rs2000_demod_write(state, 0x9d, offset & 0xf0); + + + /* Reset Demod */ + ret = m88rs2000_tab_set(state, fe_reset); + if (ret < 0) + return -ENODEV; + + /* Unknown */ + reg = m88rs2000_demod_read(state, 0x70); + ret = m88rs2000_demod_write(state, 0x70, reg); + + /* Set FEC */ + ret |= m88rs2000_set_fec(state, c->fec_inner); + ret |= m88rs2000_demod_write(state, 0x85, 0x1); + ret |= m88rs2000_demod_write(state, 0x8a, 0xbf); + ret |= m88rs2000_demod_write(state, 0x8d, 0x1e); + ret |= m88rs2000_demod_write(state, 0x90, 0xf1); + ret |= m88rs2000_demod_write(state, 0x91, 0x08); + + if (ret < 0) + return -ENODEV; + + /* Set Symbol Rate */ + ret = m88rs2000_set_symbolrate(fe, c->symbol_rate); + if (ret < 0) + return -ENODEV; + + /* Set up Demod */ + ret = m88rs2000_tab_set(state, fe_trigger); + if (ret < 0) + return -ENODEV; + + for (i = 0; i < 25; i++) { + reg = m88rs2000_demod_read(state, 0x8c); + if ((reg & 0x7) == 0x7) { + status = FE_HAS_LOCK; + break; + } + state->no_lock_count++; + if (state->no_lock_count == 15) { + reg = m88rs2000_demod_read(state, 0x70); + reg ^= 0x4; + m88rs2000_demod_write(state, 0x70, reg); + state->no_lock_count = 0; + } + if (state->no_lock_count == 20) + m88rs2000_set_tuner_rf(fe); + msleep(20); + } + + if (status & FE_HAS_LOCK) { + state->fec_inner = m88rs2000_get_fec(state); + /* Uknown suspect SNR level */ + reg = m88rs2000_demod_read(state, 0x65); + } + + state->tuner_frequency = c->frequency; + state->symbol_rate = c->symbol_rate; + return 0; +} + +static int m88rs2000_get_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct m88rs2000_state *state = fe->demodulator_priv; + c->fec_inner = state->fec_inner; + c->frequency = state->tuner_frequency; + c->symbol_rate = state->symbol_rate; + return 0; +} + +static int m88rs2000_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + + if (enable) + m88rs2000_demod_write(state, 0x81, 0x84); + else + m88rs2000_demod_write(state, 0x81, 0x81); + udelay(10); + return 0; +} + +static void m88rs2000_release(struct dvb_frontend *fe) +{ + struct m88rs2000_state *state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops m88rs2000_ops = { + .delsys = { SYS_DVBS }, + .info = { + .name = "M88RS2000 DVB-S", + .frequency_min = 950000, + .frequency_max = 2150000, + .frequency_stepsize = 1000, /* kHz for QPSK frontends */ + .frequency_tolerance = 5000, + .symbol_rate_min = 1000000, + .symbol_rate_max = 45000000, + .symbol_rate_tolerance = 500, /* ppm */ + .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | + FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | + FE_CAN_QPSK | + FE_CAN_FEC_AUTO + }, + + .release = m88rs2000_release, + .init = m88rs2000_init, + .sleep = m88rs2000_sleep, + .write = m88rs2000_write, + .i2c_gate_ctrl = m88rs2000_i2c_gate_ctrl, + .read_status = m88rs2000_read_status, + .read_ber = m88rs2000_read_ber, + .read_signal_strength = m88rs2000_read_signal_strength, + .read_snr = m88rs2000_read_snr, + .read_ucblocks = m88rs2000_read_ucblocks, + .diseqc_send_master_cmd = m88rs2000_send_diseqc_msg, + .diseqc_send_burst = m88rs2000_send_diseqc_burst, + .set_tone = m88rs2000_set_tone, + .set_voltage = m88rs2000_set_voltage, + + .set_frontend = m88rs2000_set_frontend, + .get_frontend = m88rs2000_get_frontend, +}; + +struct dvb_frontend *m88rs2000_attach(const struct m88rs2000_config *config, + struct i2c_adapter *i2c) +{ + struct m88rs2000_state *state = NULL; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct m88rs2000_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + state->tuner_frequency = 0; + state->symbol_rate = 0; + state->fec_inner = 0; + + if (m88rs2000_startup(state) < 0) + goto error; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &m88rs2000_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + + return NULL; +} +EXPORT_SYMBOL(m88rs2000_attach); + +MODULE_DESCRIPTION("M88RS2000 DVB-S Demodulator driver"); +MODULE_AUTHOR("Malcolm Priestley tvboxspy@gmail.com"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("1.13"); + |