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path: root/drivers/media/tuners/si2157.c
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Diffstat (limited to 'drivers/media/tuners/si2157.c')
-rw-r--r--drivers/media/tuners/si2157.c548
1 files changed, 548 insertions, 0 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
new file mode 100644
index 000000000..a4bba669f
--- /dev/null
+++ b/drivers/media/tuners/si2157.c
@@ -0,0 +1,548 @@
+/*
+ * Silicon Labs Si2146/2147/2148/2157/2158 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 i2c_client *client, struct si2157_cmd *cmd)
+{
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+ int ret;
+ unsigned long timeout;
+
+ mutex_lock(&dev->i2c_mutex);
+
+ if (cmd->wlen) {
+ /* write cmd and args for firmware */
+ ret = i2c_master_send(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(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(&client->dev, "cmd execution took %d ms\n",
+ jiffies_to_msecs(jiffies) -
+ (jiffies_to_msecs(timeout) - TIMEOUT));
+
+ if (!((cmd->args[0] >> 7) & 0x01)) {
+ ret = -ETIMEDOUT;
+ goto err_mutex_unlock;
+ }
+ }
+
+ mutex_unlock(&dev->i2c_mutex);
+ return 0;
+
+err_mutex_unlock:
+ mutex_unlock(&dev->i2c_mutex);
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2157_init(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->tuner_priv;
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret, len, remaining;
+ struct si2157_cmd cmd;
+ const struct firmware *fw;
+ const char *fw_name;
+ unsigned int chip_id, xtal_trim;
+
+ dev_dbg(&client->dev, "\n");
+
+ /* Try to get Xtal trim property, to verify tuner still running */
+ memcpy(cmd.args, "\x15\x00\x02\x04", 4);
+ cmd.wlen = 4;
+ cmd.rlen = 4;
+ ret = si2157_cmd_execute(client, &cmd);
+
+ xtal_trim = cmd.args[2] | (cmd.args[3] << 8);
+
+ if (ret == 0 && xtal_trim < 16)
+ goto warm;
+
+ dev->if_frequency = 0; /* we no longer know current tuner state */
+
+ /* power up */
+ if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
+ memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
+ cmd.wlen = 9;
+ } else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
+ memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
+ cmd.wlen = 10;
+ } else {
+ 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(client, &cmd);
+ if (ret)
+ goto err;
+
+ /* Si2141 needs a second command before it answers the revision query */
+ if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
+ memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
+ cmd.wlen = 7;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+ }
+
+ /* query chip revision */
+ memcpy(cmd.args, "\x02", 1);
+ cmd.wlen = 1;
+ cmd.rlen = 13;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
+ cmd.args[4] << 0;
+
+ #define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
+ #define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
+ #define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
+ #define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
+ #define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
+ #define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
+
+ switch (chip_id) {
+ case SI2158_A20:
+ case SI2148_A20:
+ fw_name = SI2158_A20_FIRMWARE;
+ break;
+ case SI2141_A10:
+ fw_name = SI2141_A10_FIRMWARE;
+ break;
+ case SI2157_A30:
+ case SI2147_A30:
+ case SI2146_A10:
+ fw_name = NULL;
+ break;
+ default:
+ dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
+ cmd.args[2], cmd.args[1],
+ cmd.args[3], cmd.args[4]);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
+ cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+
+ if (fw_name == NULL)
+ goto skip_fw_download;
+
+ /* request the firmware, this will block and timeout */
+ ret = request_firmware(&fw, fw_name, &client->dev);
+ if (ret) {
+ dev_err(&client->dev, "firmware file '%s' not found\n",
+ fw_name);
+ goto err;
+ }
+
+ /* firmware should be n chunks of 17 bytes */
+ if (fw->size % 17 != 0) {
+ dev_err(&client->dev, "firmware file '%s' is invalid\n",
+ fw_name);
+ ret = -EINVAL;
+ goto err_release_firmware;
+ }
+
+ dev_info(&client->dev, "downloading firmware from file '%s'\n",
+ fw_name);
+
+ for (remaining = fw->size; remaining > 0; remaining -= 17) {
+ len = fw->data[fw->size - remaining];
+ if (len > SI2157_ARGLEN) {
+ dev_err(&client->dev, "Bad firmware length\n");
+ ret = -EINVAL;
+ goto err_release_firmware;
+ }
+ memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
+ cmd.wlen = len;
+ cmd.rlen = 1;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret) {
+ dev_err(&client->dev, "firmware download failed %d\n",
+ ret);
+ goto err_release_firmware;
+ }
+ }
+
+ release_firmware(fw);
+
+skip_fw_download:
+ /* reboot the tuner with new firmware? */
+ memcpy(cmd.args, "\x01\x01", 2);
+ cmd.wlen = 2;
+ cmd.rlen = 1;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ /* query firmware version */
+ memcpy(cmd.args, "\x11", 1);
+ cmd.wlen = 1;
+ cmd.rlen = 10;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ dev_info(&client->dev, "firmware version: %c.%c.%d\n",
+ cmd.args[6], cmd.args[7], cmd.args[8]);
+warm:
+ /* init statistics in order signal app which are supported */
+ c->strength.len = 1;
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ /* start statistics polling */
+ schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
+
+ dev->active = true;
+ return 0;
+err_release_firmware:
+ release_firmware(fw);
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2157_sleep(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->tuner_priv;
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+ int ret;
+ struct si2157_cmd cmd;
+
+ dev_dbg(&client->dev, "\n");
+
+ dev->active = false;
+
+ /* stop statistics polling */
+ cancel_delayed_work_sync(&dev->stat_work);
+
+ /* standby */
+ memcpy(cmd.args, "\x16\x00", 2);
+ cmd.wlen = 2;
+ cmd.rlen = 1;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2157_set_params(struct dvb_frontend *fe)
+{
+ struct i2c_client *client = fe->tuner_priv;
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret;
+ struct si2157_cmd cmd;
+ u8 bandwidth, delivery_system;
+ u32 if_frequency = 5000000;
+
+ dev_dbg(&client->dev,
+ "delivery_system=%d frequency=%u bandwidth_hz=%u\n",
+ c->delivery_system, c->frequency, c->bandwidth_hz);
+
+ if (!dev->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_ATSC:
+ delivery_system = 0x00;
+ if_frequency = 3250000;
+ break;
+ case SYS_DVBC_ANNEX_B:
+ delivery_system = 0x10;
+ if_frequency = 4000000;
+ break;
+ 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;
+ if (dev->inversion)
+ cmd.args[5] = 0x01;
+ cmd.wlen = 6;
+ cmd.rlen = 4;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
+ memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
+ else
+ memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
+ cmd.args[4] = dev->if_port;
+ cmd.wlen = 6;
+ cmd.rlen = 4;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ /* set if frequency if needed */
+ if (if_frequency != dev->if_frequency) {
+ memcpy(cmd.args, "\x14\x00\x06\x07", 4);
+ cmd.args[4] = (if_frequency / 1000) & 0xff;
+ cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
+ cmd.wlen = 6;
+ cmd.rlen = 4;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ dev->if_frequency = if_frequency;
+ }
+
+ /* 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(client, &cmd);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct i2c_client *client = fe->tuner_priv;
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+
+ *frequency = dev->if_frequency;
+ return 0;
+}
+
+static const struct dvb_tuner_ops si2157_ops = {
+ .info = {
+ .name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
+ .frequency_min_hz = 42 * MHz,
+ .frequency_max_hz = 870 * MHz,
+ },
+
+ .init = si2157_init,
+ .sleep = si2157_sleep,
+ .set_params = si2157_set_params,
+ .get_if_frequency = si2157_get_if_frequency,
+};
+
+static void si2157_stat_work(struct work_struct *work)
+{
+ struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
+ struct dvb_frontend *fe = dev->fe;
+ struct i2c_client *client = fe->tuner_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct si2157_cmd cmd;
+ int ret;
+
+ dev_dbg(&client->dev, "\n");
+
+ memcpy(cmd.args, "\x42\x00", 2);
+ cmd.wlen = 2;
+ cmd.rlen = 12;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+ c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
+
+ schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
+ return;
+err:
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+}
+
+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_dev *dev;
+ struct si2157_cmd cmd;
+ int ret;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ ret = -ENOMEM;
+ dev_err(&client->dev, "kzalloc() failed\n");
+ goto err;
+ }
+
+ i2c_set_clientdata(client, dev);
+ dev->fe = cfg->fe;
+ dev->inversion = cfg->inversion;
+ dev->if_port = cfg->if_port;
+ dev->chiptype = (u8)id->driver_data;
+ dev->if_frequency = 5000000; /* default value of property 0x0706 */
+ mutex_init(&dev->i2c_mutex);
+ INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
+
+ /* check if the tuner is there */
+ cmd.wlen = 0;
+ cmd.rlen = 1;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err_kfree;
+
+ memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = client;
+
+#ifdef CONFIG_MEDIA_CONTROLLER
+ if (cfg->mdev) {
+ dev->mdev = cfg->mdev;
+
+ dev->ent.name = KBUILD_MODNAME;
+ dev->ent.function = MEDIA_ENT_F_TUNER;
+
+ dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
+ dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
+ dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS,
+ &dev->pad[0]);
+
+ if (ret)
+ goto err_kfree;
+
+ ret = media_device_register_entity(cfg->mdev, &dev->ent);
+ if (ret) {
+ media_entity_cleanup(&dev->ent);
+ goto err_kfree;
+ }
+ }
+#endif
+
+ dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
+ dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" :
+ dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
+ "Si2146" : "Si2147/2148/2157/2158");
+
+ return 0;
+
+err_kfree:
+ kfree(dev);
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int si2157_remove(struct i2c_client *client)
+{
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+ struct dvb_frontend *fe = dev->fe;
+
+ dev_dbg(&client->dev, "\n");
+
+ /* stop statistics polling */
+ cancel_delayed_work_sync(&dev->stat_work);
+
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+ if (dev->mdev)
+ media_device_unregister_entity(&dev->ent);
+#endif
+
+ memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = NULL;
+ kfree(dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id si2157_id_table[] = {
+ {"si2157", SI2157_CHIPTYPE_SI2157},
+ {"si2146", SI2157_CHIPTYPE_SI2146},
+ {"si2141", SI2157_CHIPTYPE_SI2141},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, si2157_id_table);
+
+static struct i2c_driver si2157_driver = {
+ .driver = {
+ .name = "si2157",
+ .suppress_bind_attrs = true,
+ },
+ .probe = si2157_probe,
+ .remove = si2157_remove,
+ .id_table = si2157_id_table,
+};
+
+module_i2c_driver(si2157_driver);
+
+MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
+MODULE_FIRMWARE(SI2141_A10_FIRMWARE);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 11:35:27 +0000