| /* |
| * Silicon Labs Si2157/2158 silicon tuner 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 "si2157_priv.h" |
| |
| static const struct dvb_tuner_ops si2157_ops; |
| |
| /* execute firmware command */ |
| static int si2157_cmd_execute(struct si2157 *s, struct si2157_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 80 |
| 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 si2157_init(struct dvb_frontend *fe) |
| { |
| struct si2157 *s = fe->tuner_priv; |
| int ret, remaining; |
| struct si2157_cmd cmd; |
| u8 chip, len = 0; |
| const struct firmware *fw = NULL; |
| u8 *fw_file; |
| |
| dev_dbg(&s->client->dev, "%s:\n", __func__); |
| |
| /* configure? */ |
| memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15); |
| cmd.wlen = 15; |
| cmd.rlen = 1; |
| ret = si2157_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* query chip revision */ |
| memcpy(cmd.args, "\x02", 1); |
| cmd.wlen = 1; |
| cmd.rlen = 13; |
| ret = si2157_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| chip = cmd.args[2]; /* 57 for Si2157, 58 for Si2158 */ |
| |
| /* Si2158 requires firmware download */ |
| if (chip == 58) { |
| if (((cmd.args[1] & 0x0f) == 1) && (cmd.args[3] == '2') && |
| (cmd.args[4] == '0')) |
| fw_file = SI2158_A20_FIRMWARE; |
| else { |
| dev_err(&s->client->dev, |
| "%s: no firmware file for Si%d-%c%c defined\n", |
| KBUILD_MODNAME, chip, 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, si2157_ops.info.name); |
| |
| /* request the firmware, this will block and timeout */ |
| ret = request_firmware(&fw, fw_file, &s->client->dev); |
| if (ret) { |
| 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); |
| |
| /* firmware should be n chunks of 17 bytes */ |
| if (fw->size % 17 != 0) { |
| dev_err(&s->client->dev, "%s: firmware file '%s' is invalid\n", |
| KBUILD_MODNAME, fw_file); |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| for (remaining = fw->size; remaining > 0; remaining -= 17) { |
| memcpy(&len, &fw->data[fw->size - remaining], 1); |
| memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], |
| len); |
| cmd.wlen = len; |
| cmd.rlen = 1; |
| ret = si2157_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; |
| |
| } |
| |
| /* reboot the tuner with new firmware? */ |
| memcpy(cmd.args, "\x01\x01", 2); |
| cmd.wlen = 2; |
| cmd.rlen = 1; |
| ret = si2157_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| s->active = true; |
| |
| return 0; |
| err: |
| dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int si2157_sleep(struct dvb_frontend *fe) |
| { |
| struct si2157 *s = fe->tuner_priv; |
| int ret; |
| struct si2157_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 = si2157_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 si2157_set_params(struct dvb_frontend *fe) |
| { |
| struct si2157 *s = fe->tuner_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int ret; |
| struct si2157_cmd cmd; |
| u8 bandwidth, delivery_system; |
| |
| dev_dbg(&s->client->dev, |
| "%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n", |
| __func__, c->delivery_system, c->frequency, |
| c->bandwidth_hz); |
| |
| if (!s->active) { |
| ret = -EAGAIN; |
| goto err; |
| } |
| |
| if (c->bandwidth_hz <= 6000000) |
| bandwidth = 0x06; |
| else if (c->bandwidth_hz <= 7000000) |
| bandwidth = 0x07; |
| else if (c->bandwidth_hz <= 8000000) |
| bandwidth = 0x08; |
| else |
| bandwidth = 0x0f; |
| |
| switch (c->delivery_system) { |
| case SYS_DVBT: |
| case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */ |
| delivery_system = 0x20; |
| break; |
| case SYS_DVBC_ANNEX_A: |
| delivery_system = 0x30; |
| break; |
| default: |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6); |
| cmd.args[4] = delivery_system | bandwidth; |
| cmd.wlen = 6; |
| cmd.rlen = 1; |
| ret = si2157_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| /* set frequency */ |
| memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8); |
| cmd.args[4] = (c->frequency >> 0) & 0xff; |
| cmd.args[5] = (c->frequency >> 8) & 0xff; |
| cmd.args[6] = (c->frequency >> 16) & 0xff; |
| cmd.args[7] = (c->frequency >> 24) & 0xff; |
| cmd.wlen = 8; |
| cmd.rlen = 1; |
| ret = si2157_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 const struct dvb_tuner_ops si2157_tuner_ops = { |
| .info = { |
| .name = "Silicon Labs Si2157/Si2158", |
| .frequency_min = 110000000, |
| .frequency_max = 862000000, |
| }, |
| |
| .init = si2157_init, |
| .sleep = si2157_sleep, |
| .set_params = si2157_set_params, |
| }; |
| |
| static int si2157_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct si2157_config *cfg = client->dev.platform_data; |
| struct dvb_frontend *fe = cfg->fe; |
| struct si2157 *s; |
| struct si2157_cmd cmd; |
| int ret; |
| |
| s = kzalloc(sizeof(struct si2157), GFP_KERNEL); |
| if (!s) { |
| ret = -ENOMEM; |
| dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME); |
| goto err; |
| } |
| |
| s->client = client; |
| s->fe = cfg->fe; |
| mutex_init(&s->i2c_mutex); |
| |
| /* check if the tuner is there */ |
| cmd.wlen = 0; |
| cmd.rlen = 1; |
| ret = si2157_cmd_execute(s, &cmd); |
| if (ret) |
| goto err; |
| |
| fe->tuner_priv = s; |
| memcpy(&fe->ops.tuner_ops, &si2157_tuner_ops, |
| sizeof(struct dvb_tuner_ops)); |
| |
| i2c_set_clientdata(client, s); |
| |
| dev_info(&s->client->dev, |
| "%s: Silicon Labs Si2157/Si2158 successfully attached\n", |
| KBUILD_MODNAME); |
| return 0; |
| err: |
| dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret); |
| kfree(s); |
| |
| return ret; |
| } |
| |
| static int si2157_remove(struct i2c_client *client) |
| { |
| struct si2157 *s = i2c_get_clientdata(client); |
| struct dvb_frontend *fe = s->fe; |
| |
| dev_dbg(&client->dev, "%s:\n", __func__); |
| |
| memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); |
| fe->tuner_priv = NULL; |
| kfree(s); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id si2157_id[] = { |
| {"si2157", 0}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, si2157_id); |
| |
| static struct i2c_driver si2157_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "si2157", |
| }, |
| .probe = si2157_probe, |
| .remove = si2157_remove, |
| .id_table = si2157_id, |
| }; |
| |
| module_i2c_driver(si2157_driver); |
| |
| MODULE_DESCRIPTION("Silicon Labs Si2157/Si2158 silicon tuner driver"); |
| MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_FIRMWARE(SI2158_A20_FIRMWARE); |