| /* |
| * Silicon Labs Si2168 DVB-T/T2/C demodulator driver |
| * |
| * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> |
| * |
| * 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. |
| */ |
| |
| #include "si2168_priv.h" |
| |
| static const struct dvb_frontend_ops si2168_ops; |
| |
| /* execute firmware command */ |
| static int si2168_cmd_execute(struct si2168 *s, struct si2168_cmd *cmd) |
| { |
| int ret; |
| unsigned long timeout; |
| |
| mutex_lock(&s->i2c_mutex); |
| |
| if (cmd->wlen) { |
| /* write cmd and args for firmware */ |
| ret = i2c_master_send(s->client, cmd->args, cmd->wlen); |
| if (ret < 0) { |
| goto err_mutex_unlock; |
| } else if (ret != cmd->wlen) { |
| ret = -EREMOTEIO; |
| goto err_mutex_unlock; |
| } |
| } |
| |
| if (cmd->rlen) { |
| /* wait cmd execution terminate */ |
| #define TIMEOUT 50 |
| timeout = jiffies + msecs_to_jiffies(TIMEOUT); |
| while (!time_after(jiffies, timeout)) { |
| ret = i2c_master_recv(s->client, cmd->args, cmd->rlen); |
| if (ret < 0) { |
| goto err_mutex_unlock; |
| } else if (ret != cmd->rlen) { |
| ret = -EREMOTEIO; |
| goto err_mutex_unlock; |
| } |
| |
| /* firmware ready? */ |
| if ((cmd->args[0] >> 7) & 0x01) |
| break; |
| } |
| |
| dev_dbg(&s->client->dev, "%s: cmd execution took %d ms\n", |
| __func__, |
| jiffies_to_msecs(jiffies) - |
| (jiffies_to_msecs(timeout) - TIMEOUT)); |
| |
| if (!((cmd->args[0] >> 7) & 0x01)) { |
| ret = -ETIMEDOUT; |
| goto err_mutex_unlock; |
| } |
| } |
| |
| ret = 0; |
| |
| err_mutex_unlock: |
| mutex_unlock(&s->i2c_mutex); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status) |
| { |
| struct si2168 *s = fe->demodulator_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int ret; |
| struct si2168_cmd cmd; |
| |
| *status = 0; |
| |
| if (!s->active) { |
| ret = -EAGAIN; |
| goto err; |
| } |
| |
| switch (c->delivery_system) { |
| case SYS_DVBT: |
| memcpy(cmd.args, "\xa0\x01", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 13; |
| break; |
| case SYS_DVBC_ANNEX_A: |
| memcpy(cmd.args, "\x90\x01", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 9; |
| break; |
| case SYS_DVBT2: |
| memcpy(cmd.args, "\x50\x01", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 14; |
| break; |
| default: |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* |
| * Possible values seen, in order from strong signal to weak: |
| * 16 0001 0110 full lock |
| * 1e 0001 1110 partial lock |
| * 1a 0001 1010 partial lock |
| * 18 0001 1000 no lock |
| * |
| * [b3:b1] lock bits |
| * [b4] statistics ready? Set in a few secs after lock is gained. |
| */ |
| |
| switch ((cmd.args[2] >> 1) & 0x03) { |
| case 0x01: |
| *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; |
| break; |
| case 0x03: |
| *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | |
| FE_HAS_SYNC | FE_HAS_LOCK; |
| break; |
| } |
| |
| s->fe_status = *status; |
| |
| if (*status & FE_HAS_LOCK) { |
| c->cnr.len = 1; |
| c->cnr.stat[0].scale = FE_SCALE_DECIBEL; |
| c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4; |
| } else { |
| c->cnr.len = 1; |
| c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| } |
| |
| dev_dbg(&s->client->dev, "%s: status=%02x args=%*ph\n", |
| __func__, *status, cmd.rlen, cmd.args); |
| |
| return 0; |
| err: |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_set_frontend(struct dvb_frontend *fe) |
| { |
| struct si2168 *s = fe->demodulator_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int ret; |
| struct si2168_cmd cmd; |
| u8 bandwidth, delivery_system; |
| |
| dev_dbg(&s->client->dev, |
| "%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u\n", |
| __func__, c->delivery_system, c->modulation, |
| c->frequency, c->bandwidth_hz, c->symbol_rate, |
| c->inversion); |
| |
| if (!s->active) { |
| ret = -EAGAIN; |
| goto err; |
| } |
| |
| switch (c->delivery_system) { |
| case SYS_DVBT: |
| delivery_system = 0x20; |
| break; |
| case SYS_DVBC_ANNEX_A: |
| delivery_system = 0x30; |
| break; |
| case SYS_DVBT2: |
| delivery_system = 0x70; |
| break; |
| default: |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| if (c->bandwidth_hz <= 5000000) |
| bandwidth = 0x05; |
| else if (c->bandwidth_hz <= 6000000) |
| bandwidth = 0x06; |
| else if (c->bandwidth_hz <= 7000000) |
| bandwidth = 0x07; |
| else if (c->bandwidth_hz <= 8000000) |
| bandwidth = 0x08; |
| else if (c->bandwidth_hz <= 9000000) |
| bandwidth = 0x09; |
| else if (c->bandwidth_hz <= 10000000) |
| bandwidth = 0x0a; |
| else |
| bandwidth = 0x0f; |
| |
| /* program tuner */ |
| if (fe->ops.tuner_ops.set_params) { |
| ret = fe->ops.tuner_ops.set_params(fe); |
| if (ret) |
| goto err; |
| } |
| |
| memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5); |
| cmd.wlen = 5; |
| cmd.rlen = 5; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* that has no big effect */ |
| if (c->delivery_system == SYS_DVBT) |
| memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6); |
| else if (c->delivery_system == SYS_DVBC_ANNEX_A) |
| memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6); |
| else if (c->delivery_system == SYS_DVBT2) |
| memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 3; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x51\x03", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 12; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x12\x08\x04", 3); |
| cmd.wlen = 3; |
| cmd.rlen = 3; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6); |
| cmd.args[4] = delivery_system | bandwidth; |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* set DVB-C symbol rate */ |
| if (c->delivery_system == SYS_DVBC_ANNEX_A) { |
| memcpy(cmd.args, "\x14\x00\x02\x11", 4); |
| cmd.args[4] = (c->symbol_rate / 1000) & 0xff; |
| cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff; |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| } |
| |
| memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x01\x10\x16\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x18", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x15", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6); |
| cmd.wlen = 6; |
| cmd.rlen = 4; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\x85", 1); |
| cmd.wlen = 1; |
| cmd.rlen = 1; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| s->delivery_system = c->delivery_system; |
| |
| return 0; |
| err: |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_init(struct dvb_frontend *fe) |
| { |
| struct si2168 *s = fe->demodulator_priv; |
| int ret, len, remaining; |
| const struct firmware *fw = NULL; |
| u8 *fw_file; |
| const unsigned int i2c_wr_max = 8; |
| struct si2168_cmd cmd; |
| unsigned int chip_id; |
| |
| dev_dbg(&s->client->dev, "%s:\n", __func__); |
| |
| memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13); |
| cmd.wlen = 13; |
| cmd.rlen = 0; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8); |
| cmd.wlen = 8; |
| cmd.rlen = 1; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* query chip revision */ |
| memcpy(cmd.args, "\x02", 1); |
| cmd.wlen = 1; |
| cmd.rlen = 13; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 | |
| cmd.args[4] << 0; |
| |
| #define SI2168_A20 ('A' << 24 | 68 << 16 | '2' << 8 | '0' << 0) |
| #define SI2168_A30 ('A' << 24 | 68 << 16 | '3' << 8 | '0' << 0) |
| #define SI2168_B40 ('B' << 24 | 68 << 16 | '4' << 8 | '0' << 0) |
| |
| switch (chip_id) { |
| case SI2168_A20: |
| fw_file = SI2168_A20_FIRMWARE; |
| break; |
| case SI2168_A30: |
| fw_file = SI2168_A30_FIRMWARE; |
| break; |
| case SI2168_B40: |
| fw_file = SI2168_B40_FIRMWARE; |
| break; |
| default: |
| dev_err(&s->client->dev, |
| "%s: unkown chip version Si21%d-%c%c%c\n", |
| KBUILD_MODNAME, cmd.args[2], cmd.args[1], |
| cmd.args[3], cmd.args[4]); |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| /* cold state - try to download firmware */ |
| dev_info(&s->client->dev, "%s: found a '%s' in cold state\n", |
| KBUILD_MODNAME, si2168_ops.info.name); |
| |
| /* request the firmware, this will block and timeout */ |
| ret = request_firmware(&fw, fw_file, &s->client->dev); |
| if (ret) { |
| /* fallback mechanism to handle old name for Si2168 B40 fw */ |
| if (chip_id == SI2168_B40) { |
| fw_file = SI2168_B40_FIRMWARE_FALLBACK; |
| ret = request_firmware(&fw, fw_file, &s->client->dev); |
| } |
| |
| if (ret == 0) { |
| dev_notice(&s->client->dev, |
| "%s: please install firmware file '%s'\n", |
| KBUILD_MODNAME, SI2168_B40_FIRMWARE); |
| } else { |
| dev_err(&s->client->dev, |
| "%s: firmware file '%s' not found\n", |
| KBUILD_MODNAME, fw_file); |
| goto err; |
| } |
| } |
| |
| dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n", |
| KBUILD_MODNAME, fw_file); |
| |
| for (remaining = fw->size; remaining > 0; remaining -= i2c_wr_max) { |
| len = remaining; |
| if (len > i2c_wr_max) |
| len = i2c_wr_max; |
| |
| memcpy(cmd.args, &fw->data[fw->size - remaining], len); |
| cmd.wlen = len; |
| cmd.rlen = 1; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) { |
| dev_err(&s->client->dev, |
| "%s: firmware download failed=%d\n", |
| KBUILD_MODNAME, ret); |
| goto err; |
| } |
| } |
| |
| release_firmware(fw); |
| fw = NULL; |
| |
| memcpy(cmd.args, "\x01\x01", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 1; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| dev_info(&s->client->dev, "%s: found a '%s' in warm state\n", |
| KBUILD_MODNAME, si2168_ops.info.name); |
| |
| s->active = true; |
| |
| return 0; |
| err: |
| if (fw) |
| release_firmware(fw); |
| |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_sleep(struct dvb_frontend *fe) |
| { |
| struct si2168 *s = fe->demodulator_priv; |
| int ret; |
| struct si2168_cmd cmd; |
| |
| dev_dbg(&s->client->dev, "%s:\n", __func__); |
| |
| s->active = false; |
| |
| memcpy(cmd.args, "\x13", 1); |
| cmd.wlen = 1; |
| cmd.rlen = 0; |
| ret = si2168_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_get_tune_settings(struct dvb_frontend *fe, |
| struct dvb_frontend_tune_settings *s) |
| { |
| s->min_delay_ms = 900; |
| |
| return 0; |
| } |
| |
| /* |
| * I2C gate logic |
| * We must use unlocked i2c_transfer() here because I2C lock is already taken |
| * by tuner driver. |
| */ |
| static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan) |
| { |
| struct si2168 *s = mux_priv; |
| int ret; |
| struct i2c_msg gate_open_msg = { |
| .addr = s->client->addr, |
| .flags = 0, |
| .len = 3, |
| .buf = "\xc0\x0d\x01", |
| }; |
| |
| mutex_lock(&s->i2c_mutex); |
| |
| /* open tuner I2C gate */ |
| ret = __i2c_transfer(s->client->adapter, &gate_open_msg, 1); |
| if (ret != 1) { |
| dev_warn(&s->client->dev, "%s: i2c write failed=%d\n", |
| KBUILD_MODNAME, ret); |
| if (ret >= 0) |
| ret = -EREMOTEIO; |
| } else { |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan) |
| { |
| struct si2168 *s = mux_priv; |
| int ret; |
| struct i2c_msg gate_close_msg = { |
| .addr = s->client->addr, |
| .flags = 0, |
| .len = 3, |
| .buf = "\xc0\x0d\x00", |
| }; |
| |
| /* close tuner I2C gate */ |
| ret = __i2c_transfer(s->client->adapter, &gate_close_msg, 1); |
| if (ret != 1) { |
| dev_warn(&s->client->dev, "%s: i2c write failed=%d\n", |
| KBUILD_MODNAME, ret); |
| if (ret >= 0) |
| ret = -EREMOTEIO; |
| } else { |
| ret = 0; |
| } |
| |
| mutex_unlock(&s->i2c_mutex); |
| |
| return ret; |
| } |
| |
| static const struct dvb_frontend_ops si2168_ops = { |
| .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A}, |
| .info = { |
| .name = "Silicon Labs Si2168", |
| .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_FEC_AUTO | |
| FE_CAN_QPSK | |
| FE_CAN_QAM_16 | |
| FE_CAN_QAM_32 | |
| FE_CAN_QAM_64 | |
| FE_CAN_QAM_128 | |
| FE_CAN_QAM_256 | |
| FE_CAN_QAM_AUTO | |
| FE_CAN_TRANSMISSION_MODE_AUTO | |
| FE_CAN_GUARD_INTERVAL_AUTO | |
| FE_CAN_HIERARCHY_AUTO | |
| FE_CAN_MUTE_TS | |
| FE_CAN_2G_MODULATION |
| }, |
| |
| .get_tune_settings = si2168_get_tune_settings, |
| |
| .init = si2168_init, |
| .sleep = si2168_sleep, |
| |
| .set_frontend = si2168_set_frontend, |
| |
| .read_status = si2168_read_status, |
| }; |
| |
| static int si2168_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct si2168_config *config = client->dev.platform_data; |
| struct si2168 *s; |
| int ret; |
| |
| dev_dbg(&client->dev, "%s:\n", __func__); |
| |
| s = kzalloc(sizeof(struct si2168), GFP_KERNEL); |
| if (!s) { |
| ret = -ENOMEM; |
| dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME); |
| goto err; |
| } |
| |
| s->client = client; |
| mutex_init(&s->i2c_mutex); |
| |
| /* create mux i2c adapter for tuner */ |
| s->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, s, |
| 0, 0, 0, si2168_select, si2168_deselect); |
| if (s->adapter == NULL) { |
| ret = -ENODEV; |
| goto err; |
| } |
| |
| /* create dvb_frontend */ |
| memcpy(&s->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops)); |
| s->fe.demodulator_priv = s; |
| |
| *config->i2c_adapter = s->adapter; |
| *config->fe = &s->fe; |
| |
| i2c_set_clientdata(client, s); |
| |
| dev_info(&s->client->dev, |
| "%s: Silicon Labs Si2168 successfully attached\n", |
| KBUILD_MODNAME); |
| return 0; |
| err: |
| kfree(s); |
| dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2168_remove(struct i2c_client *client) |
| { |
| struct si2168 *s = i2c_get_clientdata(client); |
| |
| dev_dbg(&client->dev, "%s:\n", __func__); |
| |
| i2c_del_mux_adapter(s->adapter); |
| |
| s->fe.ops.release = NULL; |
| s->fe.demodulator_priv = NULL; |
| |
| kfree(s); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id si2168_id[] = { |
| {"si2168", 0}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, si2168_id); |
| |
| static struct i2c_driver si2168_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "si2168", |
| }, |
| .probe = si2168_probe, |
| .remove = si2168_remove, |
| .id_table = si2168_id, |
| }; |
| |
| module_i2c_driver(si2168_driver); |
| |
| MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_FIRMWARE(SI2168_A20_FIRMWARE); |
| MODULE_FIRMWARE(SI2168_A30_FIRMWARE); |
| MODULE_FIRMWARE(SI2168_B40_FIRMWARE); |