--- /dev/null
+/*
+ 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);
+ if (burst == SEC_MINI_B)
+ reg1 |= 0x1;
+ 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:
+ return -EINVAL;
+ }
+ 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, 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)
+{
+ deb_info("%s: %s\n", __func__,
+ volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
+ volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
+
+ 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_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 < 0x17)
+ 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)
+{
+ int ret;
+ 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;
+ }
+ ret = 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++) {
+ u8 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",
+ .type = FE_QPSK,
+ .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("1.12");
+
projects / cascardo / linux.git / commitdiff