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- /*
- Samsung S5H1409 VSB/QAM demodulator driver
- Copyright (C) 2006 Steven Toth <stoth@linuxtv.org>
- 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/kernel.h>
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include "dvb_frontend.h"
- #include "s5h1409.h"
- struct s5h1409_state {
- struct i2c_adapter *i2c;
- /* configuration settings */
- const struct s5h1409_config *config;
- struct dvb_frontend frontend;
- /* previous uncorrected block counter */
- fe_modulation_t current_modulation;
- u32 current_frequency;
- int if_freq;
- u32 is_qam_locked;
- /* QAM tuning state goes through the following state transitions */
- #define QAM_STATE_UNTUNED 0
- #define QAM_STATE_TUNING_STARTED 1
- #define QAM_STATE_INTERLEAVE_SET 2
- #define QAM_STATE_QAM_OPTIMIZED_L1 3
- #define QAM_STATE_QAM_OPTIMIZED_L2 4
- #define QAM_STATE_QAM_OPTIMIZED_L3 5
- u8 qam_state;
- };
- static int debug;
- module_param(debug, int, 0644);
- MODULE_PARM_DESC(debug, "Enable verbose debug messages");
- #define dprintk if (debug) printk
- /* Register values to initialise the demod, this will set VSB by default */
- static struct init_tab {
- u8 reg;
- u16 data;
- } init_tab[] = {
- { 0x00, 0x0071, },
- { 0x01, 0x3213, },
- { 0x09, 0x0025, },
- { 0x1c, 0x001d, },
- { 0x1f, 0x002d, },
- { 0x20, 0x001d, },
- { 0x22, 0x0022, },
- { 0x23, 0x0020, },
- { 0x29, 0x110f, },
- { 0x2a, 0x10b4, },
- { 0x2b, 0x10ae, },
- { 0x2c, 0x0031, },
- { 0x31, 0x010d, },
- { 0x32, 0x0100, },
- { 0x44, 0x0510, },
- { 0x54, 0x0104, },
- { 0x58, 0x2222, },
- { 0x59, 0x1162, },
- { 0x5a, 0x3211, },
- { 0x5d, 0x0370, },
- { 0x5e, 0x0296, },
- { 0x61, 0x0010, },
- { 0x63, 0x4a00, },
- { 0x65, 0x0800, },
- { 0x71, 0x0003, },
- { 0x72, 0x0470, },
- { 0x81, 0x0002, },
- { 0x82, 0x0600, },
- { 0x86, 0x0002, },
- { 0x8a, 0x2c38, },
- { 0x8b, 0x2a37, },
- { 0x92, 0x302f, },
- { 0x93, 0x3332, },
- { 0x96, 0x000c, },
- { 0x99, 0x0101, },
- { 0x9c, 0x2e37, },
- { 0x9d, 0x2c37, },
- { 0x9e, 0x2c37, },
- { 0xab, 0x0100, },
- { 0xac, 0x1003, },
- { 0xad, 0x103f, },
- { 0xe2, 0x0100, },
- { 0xe3, 0x1000, },
- { 0x28, 0x1010, },
- { 0xb1, 0x000e, },
- };
- /* VSB SNR lookup table */
- static struct vsb_snr_tab {
- u16 val;
- u16 data;
- } vsb_snr_tab[] = {
- { 924, 300, },
- { 923, 300, },
- { 918, 295, },
- { 915, 290, },
- { 911, 285, },
- { 906, 280, },
- { 901, 275, },
- { 896, 270, },
- { 891, 265, },
- { 885, 260, },
- { 879, 255, },
- { 873, 250, },
- { 864, 245, },
- { 858, 240, },
- { 850, 235, },
- { 841, 230, },
- { 832, 225, },
- { 823, 220, },
- { 812, 215, },
- { 802, 210, },
- { 788, 205, },
- { 778, 200, },
- { 767, 195, },
- { 753, 190, },
- { 740, 185, },
- { 725, 180, },
- { 707, 175, },
- { 689, 170, },
- { 671, 165, },
- { 656, 160, },
- { 637, 155, },
- { 616, 150, },
- { 542, 145, },
- { 519, 140, },
- { 507, 135, },
- { 497, 130, },
- { 492, 125, },
- { 474, 120, },
- { 300, 111, },
- { 0, 0, },
- };
- /* QAM64 SNR lookup table */
- static struct qam64_snr_tab {
- u16 val;
- u16 data;
- } qam64_snr_tab[] = {
- { 1, 0, },
- { 12, 300, },
- { 15, 290, },
- { 18, 280, },
- { 22, 270, },
- { 23, 268, },
- { 24, 266, },
- { 25, 264, },
- { 27, 262, },
- { 28, 260, },
- { 29, 258, },
- { 30, 256, },
- { 32, 254, },
- { 33, 252, },
- { 34, 250, },
- { 35, 249, },
- { 36, 248, },
- { 37, 247, },
- { 38, 246, },
- { 39, 245, },
- { 40, 244, },
- { 41, 243, },
- { 42, 241, },
- { 43, 240, },
- { 44, 239, },
- { 45, 238, },
- { 46, 237, },
- { 47, 236, },
- { 48, 235, },
- { 49, 234, },
- { 50, 233, },
- { 51, 232, },
- { 52, 231, },
- { 53, 230, },
- { 55, 229, },
- { 56, 228, },
- { 57, 227, },
- { 58, 226, },
- { 59, 225, },
- { 60, 224, },
- { 62, 223, },
- { 63, 222, },
- { 65, 221, },
- { 66, 220, },
- { 68, 219, },
- { 69, 218, },
- { 70, 217, },
- { 72, 216, },
- { 73, 215, },
- { 75, 214, },
- { 76, 213, },
- { 78, 212, },
- { 80, 211, },
- { 81, 210, },
- { 83, 209, },
- { 84, 208, },
- { 85, 207, },
- { 87, 206, },
- { 89, 205, },
- { 91, 204, },
- { 93, 203, },
- { 95, 202, },
- { 96, 201, },
- { 104, 200, },
- { 255, 0, },
- };
- /* QAM256 SNR lookup table */
- static struct qam256_snr_tab {
- u16 val;
- u16 data;
- } qam256_snr_tab[] = {
- { 1, 0, },
- { 12, 400, },
- { 13, 390, },
- { 15, 380, },
- { 17, 360, },
- { 19, 350, },
- { 22, 348, },
- { 23, 346, },
- { 24, 344, },
- { 25, 342, },
- { 26, 340, },
- { 27, 336, },
- { 28, 334, },
- { 29, 332, },
- { 30, 330, },
- { 31, 328, },
- { 32, 326, },
- { 33, 325, },
- { 34, 322, },
- { 35, 320, },
- { 37, 318, },
- { 39, 316, },
- { 40, 314, },
- { 41, 312, },
- { 42, 310, },
- { 43, 308, },
- { 46, 306, },
- { 47, 304, },
- { 49, 302, },
- { 51, 300, },
- { 53, 298, },
- { 54, 297, },
- { 55, 296, },
- { 56, 295, },
- { 57, 294, },
- { 59, 293, },
- { 60, 292, },
- { 61, 291, },
- { 63, 290, },
- { 64, 289, },
- { 65, 288, },
- { 66, 287, },
- { 68, 286, },
- { 69, 285, },
- { 71, 284, },
- { 72, 283, },
- { 74, 282, },
- { 75, 281, },
- { 76, 280, },
- { 77, 279, },
- { 78, 278, },
- { 81, 277, },
- { 83, 276, },
- { 84, 275, },
- { 86, 274, },
- { 87, 273, },
- { 89, 272, },
- { 90, 271, },
- { 92, 270, },
- { 93, 269, },
- { 95, 268, },
- { 96, 267, },
- { 98, 266, },
- { 100, 265, },
- { 102, 264, },
- { 104, 263, },
- { 105, 262, },
- { 106, 261, },
- { 110, 260, },
- { 255, 0, },
- };
- /* 8 bit registers, 16 bit values */
- static int s5h1409_writereg(struct s5h1409_state *state, u8 reg, u16 data)
- {
- int ret;
- u8 buf[] = { reg, data >> 8, data & 0xff };
- struct i2c_msg msg = { .addr = state->config->demod_address,
- .flags = 0, .buf = buf, .len = 3 };
- ret = i2c_transfer(state->i2c, &msg, 1);
- if (ret != 1)
- printk(KERN_ERR "%s: error (reg == 0x%02x, val == 0x%04x, "
- "ret == %i)\n", __func__, reg, data, ret);
- return (ret != 1) ? -1 : 0;
- }
- static u16 s5h1409_readreg(struct s5h1409_state *state, u8 reg)
- {
- int ret;
- u8 b0[] = { reg };
- u8 b1[] = { 0, 0 };
- struct i2c_msg msg[] = {
- { .addr = state->config->demod_address, .flags = 0,
- .buf = b0, .len = 1 },
- { .addr = state->config->demod_address, .flags = I2C_M_RD,
- .buf = b1, .len = 2 } };
- ret = i2c_transfer(state->i2c, msg, 2);
- if (ret != 2)
- printk("%s: readreg error (ret == %i)\n", __func__, ret);
- return (b1[0] << 8) | b1[1];
- }
- static int s5h1409_softreset(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s()\n", __func__);
- s5h1409_writereg(state, 0xf5, 0);
- s5h1409_writereg(state, 0xf5, 1);
- state->is_qam_locked = 0;
- state->qam_state = QAM_STATE_UNTUNED;
- return 0;
- }
- #define S5H1409_VSB_IF_FREQ 5380
- #define S5H1409_QAM_IF_FREQ (state->config->qam_if)
- static int s5h1409_set_if_freq(struct dvb_frontend *fe, int KHz)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(%d KHz)\n", __func__, KHz);
- switch (KHz) {
- case 4000:
- s5h1409_writereg(state, 0x87, 0x014b);
- s5h1409_writereg(state, 0x88, 0x0cb5);
- s5h1409_writereg(state, 0x89, 0x03e2);
- break;
- case 5380:
- case 44000:
- default:
- s5h1409_writereg(state, 0x87, 0x01be);
- s5h1409_writereg(state, 0x88, 0x0436);
- s5h1409_writereg(state, 0x89, 0x054d);
- break;
- }
- state->if_freq = KHz;
- return 0;
- }
- static int s5h1409_set_spectralinversion(struct dvb_frontend *fe, int inverted)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(%d)\n", __func__, inverted);
- if (inverted == 1)
- return s5h1409_writereg(state, 0x1b, 0x1101); /* Inverted */
- else
- return s5h1409_writereg(state, 0x1b, 0x0110); /* Normal */
- }
- static int s5h1409_enable_modulation(struct dvb_frontend *fe,
- fe_modulation_t m)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(0x%08x)\n", __func__, m);
- switch (m) {
- case VSB_8:
- dprintk("%s() VSB_8\n", __func__);
- if (state->if_freq != S5H1409_VSB_IF_FREQ)
- s5h1409_set_if_freq(fe, S5H1409_VSB_IF_FREQ);
- s5h1409_writereg(state, 0xf4, 0);
- break;
- case QAM_64:
- case QAM_256:
- case QAM_AUTO:
- dprintk("%s() QAM_AUTO (64/256)\n", __func__);
- if (state->if_freq != S5H1409_QAM_IF_FREQ)
- s5h1409_set_if_freq(fe, S5H1409_QAM_IF_FREQ);
- s5h1409_writereg(state, 0xf4, 1);
- s5h1409_writereg(state, 0x85, 0x110);
- break;
- default:
- dprintk("%s() Invalid modulation\n", __func__);
- return -EINVAL;
- }
- state->current_modulation = m;
- s5h1409_softreset(fe);
- return 0;
- }
- static int s5h1409_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(%d)\n", __func__, enable);
- if (enable)
- return s5h1409_writereg(state, 0xf3, 1);
- else
- return s5h1409_writereg(state, 0xf3, 0);
- }
- static int s5h1409_set_gpio(struct dvb_frontend *fe, int enable)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(%d)\n", __func__, enable);
- if (enable)
- return s5h1409_writereg(state, 0xe3,
- s5h1409_readreg(state, 0xe3) | 0x1100);
- else
- return s5h1409_writereg(state, 0xe3,
- s5h1409_readreg(state, 0xe3) & 0xfeff);
- }
- static int s5h1409_sleep(struct dvb_frontend *fe, int enable)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(%d)\n", __func__, enable);
- return s5h1409_writereg(state, 0xf2, enable);
- }
- static int s5h1409_register_reset(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s()\n", __func__);
- return s5h1409_writereg(state, 0xfa, 0);
- }
- static void s5h1409_set_qam_amhum_mode(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg;
- if (state->qam_state < QAM_STATE_INTERLEAVE_SET) {
- /* We should not perform amhum optimization until
- the interleave mode has been configured */
- return;
- }
- if (state->qam_state == QAM_STATE_QAM_OPTIMIZED_L3) {
- /* We've already reached the maximum optimization level, so
- dont bother banging on the status registers */
- return;
- }
- /* QAM EQ lock check */
- reg = s5h1409_readreg(state, 0xf0);
- if ((reg >> 13) & 0x1) {
- reg &= 0xff;
- s5h1409_writereg(state, 0x96, 0x000c);
- if (reg < 0x68) {
- if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L3) {
- dprintk("%s() setting QAM state to OPT_L3\n",
- __func__);
- s5h1409_writereg(state, 0x93, 0x3130);
- s5h1409_writereg(state, 0x9e, 0x2836);
- state->qam_state = QAM_STATE_QAM_OPTIMIZED_L3;
- }
- } else {
- if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L2) {
- dprintk("%s() setting QAM state to OPT_L2\n",
- __func__);
- s5h1409_writereg(state, 0x93, 0x3332);
- s5h1409_writereg(state, 0x9e, 0x2c37);
- state->qam_state = QAM_STATE_QAM_OPTIMIZED_L2;
- }
- }
- } else {
- if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L1) {
- dprintk("%s() setting QAM state to OPT_L1\n", __func__);
- s5h1409_writereg(state, 0x96, 0x0008);
- s5h1409_writereg(state, 0x93, 0x3332);
- s5h1409_writereg(state, 0x9e, 0x2c37);
- state->qam_state = QAM_STATE_QAM_OPTIMIZED_L1;
- }
- }
- }
- static void s5h1409_set_qam_amhum_mode_legacy(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg;
- if (state->is_qam_locked)
- return;
- /* QAM EQ lock check */
- reg = s5h1409_readreg(state, 0xf0);
- if ((reg >> 13) & 0x1) {
- state->is_qam_locked = 1;
- reg &= 0xff;
- s5h1409_writereg(state, 0x96, 0x00c);
- if ((reg < 0x38) || (reg > 0x68)) {
- s5h1409_writereg(state, 0x93, 0x3332);
- s5h1409_writereg(state, 0x9e, 0x2c37);
- } else {
- s5h1409_writereg(state, 0x93, 0x3130);
- s5h1409_writereg(state, 0x9e, 0x2836);
- }
- } else {
- s5h1409_writereg(state, 0x96, 0x0008);
- s5h1409_writereg(state, 0x93, 0x3332);
- s5h1409_writereg(state, 0x9e, 0x2c37);
- }
- }
- static void s5h1409_set_qam_interleave_mode(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg, reg1, reg2;
- if (state->qam_state >= QAM_STATE_INTERLEAVE_SET) {
- /* We've done the optimization already */
- return;
- }
- reg = s5h1409_readreg(state, 0xf1);
- /* Master lock */
- if ((reg >> 15) & 0x1) {
- if (state->qam_state == QAM_STATE_UNTUNED ||
- state->qam_state == QAM_STATE_TUNING_STARTED) {
- dprintk("%s() setting QAM state to INTERLEAVE_SET\n",
- __func__);
- reg1 = s5h1409_readreg(state, 0xb2);
- reg2 = s5h1409_readreg(state, 0xad);
- s5h1409_writereg(state, 0x96, 0x0020);
- s5h1409_writereg(state, 0xad,
- (((reg1 & 0xf000) >> 4) | (reg2 & 0xf0ff)));
- state->qam_state = QAM_STATE_INTERLEAVE_SET;
- }
- } else {
- if (state->qam_state == QAM_STATE_UNTUNED) {
- dprintk("%s() setting QAM state to TUNING_STARTED\n",
- __func__);
- s5h1409_writereg(state, 0x96, 0x08);
- s5h1409_writereg(state, 0xab,
- s5h1409_readreg(state, 0xab) | 0x1001);
- state->qam_state = QAM_STATE_TUNING_STARTED;
- }
- }
- }
- static void s5h1409_set_qam_interleave_mode_legacy(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg, reg1, reg2;
- reg = s5h1409_readreg(state, 0xf1);
- /* Master lock */
- if ((reg >> 15) & 0x1) {
- if (state->qam_state != 2) {
- state->qam_state = 2;
- reg1 = s5h1409_readreg(state, 0xb2);
- reg2 = s5h1409_readreg(state, 0xad);
- s5h1409_writereg(state, 0x96, 0x20);
- s5h1409_writereg(state, 0xad,
- (((reg1 & 0xf000) >> 4) | (reg2 & 0xf0ff)));
- s5h1409_writereg(state, 0xab,
- s5h1409_readreg(state, 0xab) & 0xeffe);
- }
- } else {
- if (state->qam_state != 1) {
- state->qam_state = 1;
- s5h1409_writereg(state, 0x96, 0x08);
- s5h1409_writereg(state, 0xab,
- s5h1409_readreg(state, 0xab) | 0x1001);
- }
- }
- }
- /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
- static int s5h1409_set_frontend(struct dvb_frontend *fe,
- struct dvb_frontend_parameters *p)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s(frequency=%d)\n", __func__, p->frequency);
- s5h1409_softreset(fe);
- state->current_frequency = p->frequency;
- s5h1409_enable_modulation(fe, p->u.vsb.modulation);
- if (fe->ops.tuner_ops.set_params) {
- if (fe->ops.i2c_gate_ctrl)
- fe->ops.i2c_gate_ctrl(fe, 1);
- fe->ops.tuner_ops.set_params(fe, p);
- if (fe->ops.i2c_gate_ctrl)
- fe->ops.i2c_gate_ctrl(fe, 0);
- }
- /* Issue a reset to the demod so it knows to resync against the
- newly tuned frequency */
- s5h1409_softreset(fe);
- /* Optimize the demod for QAM */
- if (state->current_modulation != VSB_8) {
- /* This almost certainly applies to all boards, but for now
- only do it for the HVR-1600. Once the other boards are
- tested, the "legacy" versions can just go away */
- if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
- s5h1409_set_qam_interleave_mode(fe);
- s5h1409_set_qam_amhum_mode(fe);
- } else {
- s5h1409_set_qam_amhum_mode_legacy(fe);
- s5h1409_set_qam_interleave_mode_legacy(fe);
- }
- }
- return 0;
- }
- static int s5h1409_set_mpeg_timing(struct dvb_frontend *fe, int mode)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 val;
- dprintk("%s(%d)\n", __func__, mode);
- val = s5h1409_readreg(state, 0xac) & 0xcfff;
- switch (mode) {
- case S5H1409_MPEGTIMING_CONTINOUS_INVERTING_CLOCK:
- val |= 0x0000;
- break;
- case S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK:
- dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
- val |= 0x1000;
- break;
- case S5H1409_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK:
- val |= 0x2000;
- break;
- case S5H1409_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK:
- val |= 0x3000;
- break;
- default:
- return -EINVAL;
- }
- /* Configure MPEG Signal Timing charactistics */
- return s5h1409_writereg(state, 0xac, val);
- }
- /* Reset the demod hardware and reset all of the configuration registers
- to a default state. */
- static int s5h1409_init(struct dvb_frontend *fe)
- {
- int i;
- struct s5h1409_state *state = fe->demodulator_priv;
- dprintk("%s()\n", __func__);
- s5h1409_sleep(fe, 0);
- s5h1409_register_reset(fe);
- for (i = 0; i < ARRAY_SIZE(init_tab); i++)
- s5h1409_writereg(state, init_tab[i].reg, init_tab[i].data);
- /* The datasheet says that after initialisation, VSB is default */
- state->current_modulation = VSB_8;
- /* Optimize for the HVR-1600 if appropriate. Note that some of these
- may get folded into the generic case after testing with other
- devices */
- if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
- /* VSB AGC REF */
- s5h1409_writereg(state, 0x09, 0x0050);
- /* Unknown but Windows driver does it... */
- s5h1409_writereg(state, 0x21, 0x0001);
- s5h1409_writereg(state, 0x50, 0x030e);
- /* QAM AGC REF */
- s5h1409_writereg(state, 0x82, 0x0800);
- }
- if (state->config->output_mode == S5H1409_SERIAL_OUTPUT)
- s5h1409_writereg(state, 0xab,
- s5h1409_readreg(state, 0xab) | 0x100); /* Serial */
- else
- s5h1409_writereg(state, 0xab,
- s5h1409_readreg(state, 0xab) & 0xfeff); /* Parallel */
- s5h1409_set_spectralinversion(fe, state->config->inversion);
- s5h1409_set_if_freq(fe, state->if_freq);
- s5h1409_set_gpio(fe, state->config->gpio);
- s5h1409_set_mpeg_timing(fe, state->config->mpeg_timing);
- s5h1409_softreset(fe);
- /* Note: Leaving the I2C gate closed. */
- s5h1409_i2c_gate_ctrl(fe, 0);
- return 0;
- }
- static int s5h1409_read_status(struct dvb_frontend *fe, fe_status_t *status)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg;
- u32 tuner_status = 0;
- *status = 0;
- /* Optimize the demod for QAM */
- if (state->current_modulation != VSB_8) {
- /* This almost certainly applies to all boards, but for now
- only do it for the HVR-1600. Once the other boards are
- tested, the "legacy" versions can just go away */
- if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
- s5h1409_set_qam_interleave_mode(fe);
- s5h1409_set_qam_amhum_mode(fe);
- }
- }
- /* Get the demodulator status */
- reg = s5h1409_readreg(state, 0xf1);
- if (reg & 0x1000)
- *status |= FE_HAS_VITERBI;
- if (reg & 0x8000)
- *status |= FE_HAS_LOCK | FE_HAS_SYNC;
- switch (state->config->status_mode) {
- case S5H1409_DEMODLOCKING:
- if (*status & FE_HAS_VITERBI)
- *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
- break;
- case S5H1409_TUNERLOCKING:
- /* Get the tuner status */
- if (fe->ops.tuner_ops.get_status) {
- if (fe->ops.i2c_gate_ctrl)
- fe->ops.i2c_gate_ctrl(fe, 1);
- fe->ops.tuner_ops.get_status(fe, &tuner_status);
- if (fe->ops.i2c_gate_ctrl)
- fe->ops.i2c_gate_ctrl(fe, 0);
- }
- if (tuner_status)
- *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
- break;
- }
- dprintk("%s() status 0x%08x\n", __func__, *status);
- return 0;
- }
- static int s5h1409_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
- {
- int i, ret = -EINVAL;
- dprintk("%s()\n", __func__);
- for (i = 0; i < ARRAY_SIZE(qam256_snr_tab); i++) {
- if (v < qam256_snr_tab[i].val) {
- *snr = qam256_snr_tab[i].data;
- ret = 0;
- break;
- }
- }
- return ret;
- }
- static int s5h1409_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
- {
- int i, ret = -EINVAL;
- dprintk("%s()\n", __func__);
- for (i = 0; i < ARRAY_SIZE(qam64_snr_tab); i++) {
- if (v < qam64_snr_tab[i].val) {
- *snr = qam64_snr_tab[i].data;
- ret = 0;
- break;
- }
- }
- return ret;
- }
- static int s5h1409_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
- {
- int i, ret = -EINVAL;
- dprintk("%s()\n", __func__);
- for (i = 0; i < ARRAY_SIZE(vsb_snr_tab); i++) {
- if (v > vsb_snr_tab[i].val) {
- *snr = vsb_snr_tab[i].data;
- ret = 0;
- break;
- }
- }
- dprintk("%s() snr=%d\n", __func__, *snr);
- return ret;
- }
- static int s5h1409_read_snr(struct dvb_frontend *fe, u16 *snr)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- u16 reg;
- dprintk("%s()\n", __func__);
- switch (state->current_modulation) {
- case QAM_64:
- reg = s5h1409_readreg(state, 0xf0) & 0xff;
- return s5h1409_qam64_lookup_snr(fe, snr, reg);
- case QAM_256:
- reg = s5h1409_readreg(state, 0xf0) & 0xff;
- return s5h1409_qam256_lookup_snr(fe, snr, reg);
- case VSB_8:
- reg = s5h1409_readreg(state, 0xf1) & 0x3ff;
- return s5h1409_vsb_lookup_snr(fe, snr, reg);
- default:
- break;
- }
- return -EINVAL;
- }
- static int s5h1409_read_signal_strength(struct dvb_frontend *fe,
- u16 *signal_strength)
- {
- return s5h1409_read_snr(fe, signal_strength);
- }
- static int s5h1409_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- *ucblocks = s5h1409_readreg(state, 0xb5);
- return 0;
- }
- static int s5h1409_read_ber(struct dvb_frontend *fe, u32 *ber)
- {
- return s5h1409_read_ucblocks(fe, ber);
- }
- static int s5h1409_get_frontend(struct dvb_frontend *fe,
- struct dvb_frontend_parameters *p)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- p->frequency = state->current_frequency;
- p->u.vsb.modulation = state->current_modulation;
- return 0;
- }
- static int s5h1409_get_tune_settings(struct dvb_frontend *fe,
- struct dvb_frontend_tune_settings *tune)
- {
- tune->min_delay_ms = 1000;
- return 0;
- }
- static void s5h1409_release(struct dvb_frontend *fe)
- {
- struct s5h1409_state *state = fe->demodulator_priv;
- kfree(state);
- }
- static struct dvb_frontend_ops s5h1409_ops;
- struct dvb_frontend *s5h1409_attach(const struct s5h1409_config *config,
- struct i2c_adapter *i2c)
- {
- struct s5h1409_state *state = NULL;
- u16 reg;
- /* allocate memory for the internal state */
- state = kzalloc(sizeof(struct s5h1409_state), GFP_KERNEL);
- if (state == NULL)
- goto error;
- /* setup the state */
- state->config = config;
- state->i2c = i2c;
- state->current_modulation = 0;
- state->if_freq = S5H1409_VSB_IF_FREQ;
- /* check if the demod exists */
- reg = s5h1409_readreg(state, 0x04);
- if ((reg != 0x0066) && (reg != 0x007f))
- goto error;
- /* create dvb_frontend */
- memcpy(&state->frontend.ops, &s5h1409_ops,
- sizeof(struct dvb_frontend_ops));
- state->frontend.demodulator_priv = state;
- if (s5h1409_init(&state->frontend) != 0) {
- printk(KERN_ERR "%s: Failed to initialize correctly\n",
- __func__);
- goto error;
- }
- /* Note: Leaving the I2C gate open here. */
- s5h1409_i2c_gate_ctrl(&state->frontend, 1);
- return &state->frontend;
- error:
- kfree(state);
- return NULL;
- }
- EXPORT_SYMBOL(s5h1409_attach);
- static struct dvb_frontend_ops s5h1409_ops = {
- .info = {
- .name = "Samsung S5H1409 QAM/8VSB Frontend",
- .type = FE_ATSC,
- .frequency_min = 54000000,
- .frequency_max = 858000000,
- .frequency_stepsize = 62500,
- .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
- },
- .init = s5h1409_init,
- .i2c_gate_ctrl = s5h1409_i2c_gate_ctrl,
- .set_frontend = s5h1409_set_frontend,
- .get_frontend = s5h1409_get_frontend,
- .get_tune_settings = s5h1409_get_tune_settings,
- .read_status = s5h1409_read_status,
- .read_ber = s5h1409_read_ber,
- .read_signal_strength = s5h1409_read_signal_strength,
- .read_snr = s5h1409_read_snr,
- .read_ucblocks = s5h1409_read_ucblocks,
- .release = s5h1409_release,
- };
- MODULE_DESCRIPTION("Samsung S5H1409 QAM-B/ATSC Demodulator driver");
- MODULE_AUTHOR("Steven Toth");
- MODULE_LICENSE("GPL");
- /*
- * Local variables:
- * c-basic-offset: 8
- */
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