| /* |
| * drivers/media/radio/si4713-i2c.c |
| * |
| * Silicon Labs Si4713 FM Radio Transmitter I2C commands. |
| * |
| * Copyright (c) 2009 Nokia Corporation |
| * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/mutex.h> |
| #include <linux/completion.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/i2c.h> |
| #include <linux/slab.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-common.h> |
| |
| #include "si4713-i2c.h" |
| |
| /* module parameters */ |
| static int debug; |
| module_param(debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug level (0 - 2)"); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>"); |
| MODULE_DESCRIPTION("I2C driver for Si4713 FM Radio Transmitter"); |
| MODULE_VERSION("0.0.1"); |
| |
| #define DEFAULT_RDS_PI 0x00 |
| #define DEFAULT_RDS_PTY 0x00 |
| #define DEFAULT_RDS_PS_NAME "" |
| #define DEFAULT_RDS_RADIO_TEXT DEFAULT_RDS_PS_NAME |
| #define DEFAULT_RDS_DEVIATION 0x00C8 |
| #define DEFAULT_RDS_PS_REPEAT_COUNT 0x0003 |
| #define DEFAULT_LIMITER_RTIME 0x1392 |
| #define DEFAULT_LIMITER_DEV 0x102CA |
| #define DEFAULT_PILOT_FREQUENCY 0x4A38 |
| #define DEFAULT_PILOT_DEVIATION 0x1A5E |
| #define DEFAULT_ACOMP_ATIME 0x0000 |
| #define DEFAULT_ACOMP_RTIME 0xF4240L |
| #define DEFAULT_ACOMP_GAIN 0x0F |
| #define DEFAULT_ACOMP_THRESHOLD (-0x28) |
| #define DEFAULT_MUTE 0x01 |
| #define DEFAULT_POWER_LEVEL 88 |
| #define DEFAULT_FREQUENCY 8800 |
| #define DEFAULT_PREEMPHASIS FMPE_EU |
| #define DEFAULT_TUNE_RNL 0xFF |
| |
| #define to_si4713_device(sd) container_of(sd, struct si4713_device, sd) |
| |
| /* frequency domain transformation (using times 10 to avoid floats) */ |
| #define FREQDEV_UNIT 100000 |
| #define FREQV4L2_MULTI 625 |
| #define si4713_to_v4l2(f) ((f * FREQDEV_UNIT) / FREQV4L2_MULTI) |
| #define v4l2_to_si4713(f) ((f * FREQV4L2_MULTI) / FREQDEV_UNIT) |
| #define FREQ_RANGE_LOW 7600 |
| #define FREQ_RANGE_HIGH 10800 |
| |
| #define MAX_ARGS 7 |
| |
| #define RDS_BLOCK 8 |
| #define RDS_BLOCK_CLEAR 0x03 |
| #define RDS_BLOCK_LOAD 0x04 |
| #define RDS_RADIOTEXT_2A 0x20 |
| #define RDS_RADIOTEXT_BLK_SIZE 4 |
| #define RDS_RADIOTEXT_INDEX_MAX 0x0F |
| #define RDS_CARRIAGE_RETURN 0x0D |
| |
| #define rds_ps_nblocks(len) ((len / RDS_BLOCK) + (len % RDS_BLOCK ? 1 : 0)) |
| |
| #define get_status_bit(p, b, m) (((p) & (m)) >> (b)) |
| #define set_bits(p, v, b, m) (((p) & ~(m)) | ((v) << (b))) |
| |
| #define ATTACK_TIME_UNIT 500 |
| |
| #define POWER_OFF 0x00 |
| #define POWER_ON 0x01 |
| |
| #define msb(x) ((u8)((u16) x >> 8)) |
| #define lsb(x) ((u8)((u16) x & 0x00FF)) |
| #define compose_u16(msb, lsb) (((u16)msb << 8) | lsb) |
| #define check_command_failed(status) (!(status & SI4713_CTS) || \ |
| (status & SI4713_ERR)) |
| /* mute definition */ |
| #define set_mute(p) ((p & 1) | ((p & 1) << 1)); |
| #define get_mute(p) (p & 0x01) |
| |
| #ifdef DEBUG |
| #define DBG_BUFFER(device, message, buffer, size) \ |
| { \ |
| int i; \ |
| char str[(size)*5]; \ |
| for (i = 0; i < size; i++) \ |
| sprintf(str + i * 5, " 0x%02x", buffer[i]); \ |
| v4l2_dbg(2, debug, device, "%s:%s\n", message, str); \ |
| } |
| #else |
| #define DBG_BUFFER(device, message, buffer, size) |
| #endif |
| |
| /* |
| * Values for limiter release time (sorted by second column) |
| * device release |
| * value time (us) |
| */ |
| static long limiter_times[] = { |
| 2000, 250, |
| 1000, 500, |
| 510, 1000, |
| 255, 2000, |
| 170, 3000, |
| 127, 4020, |
| 102, 5010, |
| 85, 6020, |
| 73, 7010, |
| 64, 7990, |
| 57, 8970, |
| 51, 10030, |
| 25, 20470, |
| 17, 30110, |
| 13, 39380, |
| 10, 51190, |
| 8, 63690, |
| 7, 73140, |
| 6, 85330, |
| 5, 102390, |
| }; |
| |
| /* |
| * Values for audio compression release time (sorted by second column) |
| * device release |
| * value time (us) |
| */ |
| static unsigned long acomp_rtimes[] = { |
| 0, 100000, |
| 1, 200000, |
| 2, 350000, |
| 3, 525000, |
| 4, 1000000, |
| }; |
| |
| /* |
| * Values for preemphasis (sorted by second column) |
| * device preemphasis |
| * value value (v4l2) |
| */ |
| static unsigned long preemphasis_values[] = { |
| FMPE_DISABLED, V4L2_PREEMPHASIS_DISABLED, |
| FMPE_EU, V4L2_PREEMPHASIS_50_uS, |
| FMPE_USA, V4L2_PREEMPHASIS_75_uS, |
| }; |
| |
| static int usecs_to_dev(unsigned long usecs, unsigned long const array[], |
| int size) |
| { |
| int i; |
| int rval = -EINVAL; |
| |
| for (i = 0; i < size / 2; i++) |
| if (array[(i * 2) + 1] >= usecs) { |
| rval = array[i * 2]; |
| break; |
| } |
| |
| return rval; |
| } |
| |
| static unsigned long dev_to_usecs(int value, unsigned long const array[], |
| int size) |
| { |
| int i; |
| int rval = -EINVAL; |
| |
| for (i = 0; i < size / 2; i++) |
| if (array[i * 2] == value) { |
| rval = array[(i * 2) + 1]; |
| break; |
| } |
| |
| return rval; |
| } |
| |
| /* si4713_handler: IRQ handler, just complete work */ |
| static irqreturn_t si4713_handler(int irq, void *dev) |
| { |
| struct si4713_device *sdev = dev; |
| |
| v4l2_dbg(2, debug, &sdev->sd, |
| "%s: sending signal to completion work.\n", __func__); |
| complete(&sdev->work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * si4713_send_command - sends a command to si4713 and waits its response |
| * @sdev: si4713_device structure for the device we are communicating |
| * @command: command id |
| * @args: command arguments we are sending (up to 7) |
| * @argn: actual size of @args |
| * @response: buffer to place the expected response from the device (up to 15) |
| * @respn: actual size of @response |
| * @usecs: amount of time to wait before reading the response (in usecs) |
| */ |
| static int si4713_send_command(struct si4713_device *sdev, const u8 command, |
| const u8 args[], const int argn, |
| u8 response[], const int respn, const int usecs) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); |
| u8 data1[MAX_ARGS + 1]; |
| int err; |
| |
| if (!client->adapter) |
| return -ENODEV; |
| |
| /* First send the command and its arguments */ |
| data1[0] = command; |
| memcpy(data1 + 1, args, argn); |
| DBG_BUFFER(&sdev->sd, "Parameters", data1, argn + 1); |
| |
| err = i2c_master_send(client, data1, argn + 1); |
| if (err != argn + 1) { |
| v4l2_err(&sdev->sd, "Error while sending command 0x%02x\n", |
| command); |
| return (err > 0) ? -EIO : err; |
| } |
| |
| /* Wait response from interrupt */ |
| if (!wait_for_completion_timeout(&sdev->work, |
| usecs_to_jiffies(usecs) + 1)) |
| v4l2_warn(&sdev->sd, |
| "(%s) Device took too much time to answer.\n", |
| __func__); |
| |
| /* Then get the response */ |
| err = i2c_master_recv(client, response, respn); |
| if (err != respn) { |
| v4l2_err(&sdev->sd, |
| "Error while reading response for command 0x%02x\n", |
| command); |
| return (err > 0) ? -EIO : err; |
| } |
| |
| DBG_BUFFER(&sdev->sd, "Response", response, respn); |
| if (check_command_failed(response[0])) |
| return -EBUSY; |
| |
| return 0; |
| } |
| |
| /* |
| * si4713_read_property - reads a si4713 property |
| * @sdev: si4713_device structure for the device we are communicating |
| * @prop: property identification number |
| * @pv: property value to be returned on success |
| */ |
| static int si4713_read_property(struct si4713_device *sdev, u16 prop, u32 *pv) |
| { |
| int err; |
| u8 val[SI4713_GET_PROP_NRESP]; |
| /* |
| * .First byte = 0 |
| * .Second byte = property's MSB |
| * .Third byte = property's LSB |
| */ |
| const u8 args[SI4713_GET_PROP_NARGS] = { |
| 0x00, |
| msb(prop), |
| lsb(prop), |
| }; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_GET_PROPERTY, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| return err; |
| |
| *pv = compose_u16(val[2], val[3]); |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: property=0x%02x value=0x%02x status=0x%02x\n", |
| __func__, prop, *pv, val[0]); |
| |
| return err; |
| } |
| |
| /* |
| * si4713_write_property - modifies a si4713 property |
| * @sdev: si4713_device structure for the device we are communicating |
| * @prop: property identification number |
| * @val: new value for that property |
| */ |
| static int si4713_write_property(struct si4713_device *sdev, u16 prop, u16 val) |
| { |
| int rval; |
| u8 resp[SI4713_SET_PROP_NRESP]; |
| /* |
| * .First byte = 0 |
| * .Second byte = property's MSB |
| * .Third byte = property's LSB |
| * .Fourth byte = value's MSB |
| * .Fifth byte = value's LSB |
| */ |
| const u8 args[SI4713_SET_PROP_NARGS] = { |
| 0x00, |
| msb(prop), |
| lsb(prop), |
| msb(val), |
| lsb(val), |
| }; |
| |
| rval = si4713_send_command(sdev, SI4713_CMD_SET_PROPERTY, |
| args, ARRAY_SIZE(args), |
| resp, ARRAY_SIZE(resp), |
| DEFAULT_TIMEOUT); |
| |
| if (rval < 0) |
| return rval; |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: property=0x%02x value=0x%02x status=0x%02x\n", |
| __func__, prop, val, resp[0]); |
| |
| /* |
| * As there is no command response for SET_PROPERTY, |
| * wait Tcomp time to finish before proceed, in order |
| * to have property properly set. |
| */ |
| msleep(TIMEOUT_SET_PROPERTY); |
| |
| return rval; |
| } |
| |
| /* |
| * si4713_powerup - Powers the device up |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_powerup(struct si4713_device *sdev) |
| { |
| int err; |
| u8 resp[SI4713_PWUP_NRESP]; |
| /* |
| * .First byte = Enabled interrupts and boot function |
| * .Second byte = Input operation mode |
| */ |
| const u8 args[SI4713_PWUP_NARGS] = { |
| SI4713_PWUP_CTSIEN | SI4713_PWUP_GPO2OEN | SI4713_PWUP_FUNC_TX, |
| SI4713_PWUP_OPMOD_ANALOG, |
| }; |
| |
| if (sdev->power_state) |
| return 0; |
| |
| sdev->platform_data->set_power(1); |
| err = si4713_send_command(sdev, SI4713_CMD_POWER_UP, |
| args, ARRAY_SIZE(args), |
| resp, ARRAY_SIZE(resp), |
| TIMEOUT_POWER_UP); |
| |
| if (!err) { |
| v4l2_dbg(1, debug, &sdev->sd, "Powerup response: 0x%02x\n", |
| resp[0]); |
| v4l2_dbg(1, debug, &sdev->sd, "Device in power up mode\n"); |
| sdev->power_state = POWER_ON; |
| |
| err = si4713_write_property(sdev, SI4713_GPO_IEN, |
| SI4713_STC_INT | SI4713_CTS); |
| } else { |
| sdev->platform_data->set_power(0); |
| } |
| |
| return err; |
| } |
| |
| /* |
| * si4713_powerdown - Powers the device down |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_powerdown(struct si4713_device *sdev) |
| { |
| int err; |
| u8 resp[SI4713_PWDN_NRESP]; |
| |
| if (!sdev->power_state) |
| return 0; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_POWER_DOWN, |
| NULL, 0, |
| resp, ARRAY_SIZE(resp), |
| DEFAULT_TIMEOUT); |
| |
| if (!err) { |
| v4l2_dbg(1, debug, &sdev->sd, "Power down response: 0x%02x\n", |
| resp[0]); |
| v4l2_dbg(1, debug, &sdev->sd, "Device in reset mode\n"); |
| sdev->platform_data->set_power(0); |
| sdev->power_state = POWER_OFF; |
| } |
| |
| return err; |
| } |
| |
| /* |
| * si4713_checkrev - Checks if we are treating a device with the correct rev. |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_checkrev(struct si4713_device *sdev) |
| { |
| struct i2c_client *client = v4l2_get_subdevdata(&sdev->sd); |
| int rval; |
| u8 resp[SI4713_GETREV_NRESP]; |
| |
| mutex_lock(&sdev->mutex); |
| |
| rval = si4713_send_command(sdev, SI4713_CMD_GET_REV, |
| NULL, 0, |
| resp, ARRAY_SIZE(resp), |
| DEFAULT_TIMEOUT); |
| |
| if (rval < 0) |
| goto unlock; |
| |
| if (resp[1] == SI4713_PRODUCT_NUMBER) { |
| v4l2_info(&sdev->sd, "chip found @ 0x%02x (%s)\n", |
| client->addr << 1, client->adapter->name); |
| } else { |
| v4l2_err(&sdev->sd, "Invalid product number\n"); |
| rval = -EINVAL; |
| } |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| /* |
| * si4713_wait_stc - Waits STC interrupt and clears status bits. Usefull |
| * for TX_TUNE_POWER, TX_TUNE_FREQ and TX_TUNE_MEAS |
| * @sdev: si4713_device structure for the device we are communicating |
| * @usecs: timeout to wait for STC interrupt signal |
| */ |
| static int si4713_wait_stc(struct si4713_device *sdev, const int usecs) |
| { |
| int err; |
| u8 resp[SI4713_GET_STATUS_NRESP]; |
| |
| /* Wait response from STC interrupt */ |
| if (!wait_for_completion_timeout(&sdev->work, |
| usecs_to_jiffies(usecs) + 1)) |
| v4l2_warn(&sdev->sd, |
| "%s: device took too much time to answer (%d usec).\n", |
| __func__, usecs); |
| |
| /* Clear status bits */ |
| err = si4713_send_command(sdev, SI4713_CMD_GET_INT_STATUS, |
| NULL, 0, |
| resp, ARRAY_SIZE(resp), |
| DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| goto exit; |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: status bits: 0x%02x\n", __func__, resp[0]); |
| |
| if (!(resp[0] & SI4713_STC_INT)) |
| err = -EIO; |
| |
| exit: |
| return err; |
| } |
| |
| /* |
| * si4713_tx_tune_freq - Sets the state of the RF carrier and sets the tuning |
| * frequency between 76 and 108 MHz in 10 kHz units and |
| * steps of 50 kHz. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @frequency: desired frequency (76 - 108 MHz, unit 10 KHz, step 50 kHz) |
| */ |
| static int si4713_tx_tune_freq(struct si4713_device *sdev, u16 frequency) |
| { |
| int err; |
| u8 val[SI4713_TXFREQ_NRESP]; |
| /* |
| * .First byte = 0 |
| * .Second byte = frequency's MSB |
| * .Third byte = frequency's LSB |
| */ |
| const u8 args[SI4713_TXFREQ_NARGS] = { |
| 0x00, |
| msb(frequency), |
| lsb(frequency), |
| }; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_FREQ, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| return err; |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: frequency=0x%02x status=0x%02x\n", __func__, |
| frequency, val[0]); |
| |
| err = si4713_wait_stc(sdev, TIMEOUT_TX_TUNE); |
| if (err < 0) |
| return err; |
| |
| return compose_u16(args[1], args[2]); |
| } |
| |
| /* |
| * si4713_tx_tune_power - Sets the RF voltage level between 88 and 115 dBuV in |
| * 1 dB units. A value of 0x00 indicates off. The command |
| * also sets the antenna tuning capacitance. A value of 0 |
| * indicates autotuning, and a value of 1 - 191 indicates |
| * a manual override, which results in a tuning |
| * capacitance of 0.25 pF x @antcap. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @power: tuning power (88 - 115 dBuV, unit/step 1 dB) |
| * @antcap: value of antenna tuning capacitor (0 - 191) |
| */ |
| static int si4713_tx_tune_power(struct si4713_device *sdev, u8 power, |
| u8 antcap) |
| { |
| int err; |
| u8 val[SI4713_TXPWR_NRESP]; |
| /* |
| * .First byte = 0 |
| * .Second byte = 0 |
| * .Third byte = power |
| * .Fourth byte = antcap |
| */ |
| const u8 args[SI4713_TXPWR_NARGS] = { |
| 0x00, |
| 0x00, |
| power, |
| antcap, |
| }; |
| |
| if (((power > 0) && (power < SI4713_MIN_POWER)) || |
| power > SI4713_MAX_POWER || antcap > SI4713_MAX_ANTCAP) |
| return -EDOM; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_POWER, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| return err; |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: power=0x%02x antcap=0x%02x status=0x%02x\n", |
| __func__, power, antcap, val[0]); |
| |
| return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE_POWER); |
| } |
| |
| /* |
| * si4713_tx_tune_measure - Enters receive mode and measures the received noise |
| * level in units of dBuV on the selected frequency. |
| * The Frequency must be between 76 and 108 MHz in 10 kHz |
| * units and steps of 50 kHz. The command also sets the |
| * antenna tuning capacitance. A value of 0 means |
| * autotuning, and a value of 1 to 191 indicates manual |
| * override. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @frequency: desired frequency (76 - 108 MHz, unit 10 KHz, step 50 kHz) |
| * @antcap: value of antenna tuning capacitor (0 - 191) |
| */ |
| static int si4713_tx_tune_measure(struct si4713_device *sdev, u16 frequency, |
| u8 antcap) |
| { |
| int err; |
| u8 val[SI4713_TXMEA_NRESP]; |
| /* |
| * .First byte = 0 |
| * .Second byte = frequency's MSB |
| * .Third byte = frequency's LSB |
| * .Fourth byte = antcap |
| */ |
| const u8 args[SI4713_TXMEA_NARGS] = { |
| 0x00, |
| msb(frequency), |
| lsb(frequency), |
| antcap, |
| }; |
| |
| sdev->tune_rnl = DEFAULT_TUNE_RNL; |
| |
| if (antcap > SI4713_MAX_ANTCAP) |
| return -EDOM; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_MEASURE, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| return err; |
| |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: frequency=0x%02x antcap=0x%02x status=0x%02x\n", |
| __func__, frequency, antcap, val[0]); |
| |
| return si4713_wait_stc(sdev, TIMEOUT_TX_TUNE); |
| } |
| |
| /* |
| * si4713_tx_tune_status- Returns the status of the tx_tune_freq, tx_tune_mea or |
| * tx_tune_power commands. This command return the current |
| * frequency, output voltage in dBuV, the antenna tunning |
| * capacitance value and the received noise level. The |
| * command also clears the stcint interrupt bit when the |
| * first bit of its arguments is high. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @intack: 0x01 to clear the seek/tune complete interrupt status indicator. |
| * @frequency: returned frequency |
| * @power: returned power |
| * @antcap: returned antenna capacitance |
| * @noise: returned noise level |
| */ |
| static int si4713_tx_tune_status(struct si4713_device *sdev, u8 intack, |
| u16 *frequency, u8 *power, |
| u8 *antcap, u8 *noise) |
| { |
| int err; |
| u8 val[SI4713_TXSTATUS_NRESP]; |
| /* |
| * .First byte = intack bit |
| */ |
| const u8 args[SI4713_TXSTATUS_NARGS] = { |
| intack & SI4713_INTACK_MASK, |
| }; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_TUNE_STATUS, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (!err) { |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: status=0x%02x\n", __func__, val[0]); |
| *frequency = compose_u16(val[2], val[3]); |
| sdev->frequency = *frequency; |
| *power = val[5]; |
| *antcap = val[6]; |
| *noise = val[7]; |
| v4l2_dbg(1, debug, &sdev->sd, "%s: response: %d x 10 kHz " |
| "(power %d, antcap %d, rnl %d)\n", __func__, |
| *frequency, *power, *antcap, *noise); |
| } |
| |
| return err; |
| } |
| |
| /* |
| * si4713_tx_rds_buff - Loads the RDS group buffer FIFO or circular buffer. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @mode: the buffer operation mode. |
| * @rdsb: RDS Block B |
| * @rdsc: RDS Block C |
| * @rdsd: RDS Block D |
| * @cbleft: returns the number of available circular buffer blocks minus the |
| * number of used circular buffer blocks. |
| */ |
| static int si4713_tx_rds_buff(struct si4713_device *sdev, u8 mode, u16 rdsb, |
| u16 rdsc, u16 rdsd, s8 *cbleft) |
| { |
| int err; |
| u8 val[SI4713_RDSBUFF_NRESP]; |
| |
| const u8 args[SI4713_RDSBUFF_NARGS] = { |
| mode & SI4713_RDSBUFF_MODE_MASK, |
| msb(rdsb), |
| lsb(rdsb), |
| msb(rdsc), |
| lsb(rdsc), |
| msb(rdsd), |
| lsb(rdsd), |
| }; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_BUFF, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (!err) { |
| v4l2_dbg(1, debug, &sdev->sd, |
| "%s: status=0x%02x\n", __func__, val[0]); |
| *cbleft = (s8)val[2] - val[3]; |
| v4l2_dbg(1, debug, &sdev->sd, "%s: response: interrupts" |
| " 0x%02x cb avail: %d cb used %d fifo avail" |
| " %d fifo used %d\n", __func__, val[1], |
| val[2], val[3], val[4], val[5]); |
| } |
| |
| return err; |
| } |
| |
| /* |
| * si4713_tx_rds_ps - Loads the program service buffer. |
| * @sdev: si4713_device structure for the device we are communicating |
| * @psid: program service id to be loaded. |
| * @pschar: assumed 4 size char array to be loaded into the program service |
| */ |
| static int si4713_tx_rds_ps(struct si4713_device *sdev, u8 psid, |
| unsigned char *pschar) |
| { |
| int err; |
| u8 val[SI4713_RDSPS_NRESP]; |
| |
| const u8 args[SI4713_RDSPS_NARGS] = { |
| psid & SI4713_RDSPS_PSID_MASK, |
| pschar[0], |
| pschar[1], |
| pschar[2], |
| pschar[3], |
| }; |
| |
| err = si4713_send_command(sdev, SI4713_CMD_TX_RDS_PS, |
| args, ARRAY_SIZE(args), val, |
| ARRAY_SIZE(val), DEFAULT_TIMEOUT); |
| |
| if (err < 0) |
| return err; |
| |
| v4l2_dbg(1, debug, &sdev->sd, "%s: status=0x%02x\n", __func__, val[0]); |
| |
| return err; |
| } |
| |
| static int si4713_set_power_state(struct si4713_device *sdev, u8 value) |
| { |
| int rval; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (value) |
| rval = si4713_powerup(sdev); |
| else |
| rval = si4713_powerdown(sdev); |
| |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static int si4713_set_mute(struct si4713_device *sdev, u16 mute) |
| { |
| int rval = 0; |
| |
| mute = set_mute(mute); |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) |
| rval = si4713_write_property(sdev, |
| SI4713_TX_LINE_INPUT_MUTE, mute); |
| |
| if (rval >= 0) |
| sdev->mute = get_mute(mute); |
| |
| mutex_unlock(&sdev->mutex); |
| |
| return rval; |
| } |
| |
| static int si4713_set_rds_ps_name(struct si4713_device *sdev, char *ps_name) |
| { |
| int rval = 0, i; |
| u8 len = 0; |
| |
| /* We want to clear the whole thing */ |
| if (!strlen(ps_name)) |
| memset(ps_name, 0, MAX_RDS_PS_NAME + 1); |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| /* Write the new ps name and clear the padding */ |
| for (i = 0; i < MAX_RDS_PS_NAME; i += (RDS_BLOCK / 2)) { |
| rval = si4713_tx_rds_ps(sdev, (i / (RDS_BLOCK / 2)), |
| ps_name + i); |
| if (rval < 0) |
| goto unlock; |
| } |
| |
| /* Setup the size to be sent */ |
| if (strlen(ps_name)) |
| len = strlen(ps_name) - 1; |
| else |
| len = 1; |
| |
| rval = si4713_write_property(sdev, |
| SI4713_TX_RDS_PS_MESSAGE_COUNT, |
| rds_ps_nblocks(len)); |
| if (rval < 0) |
| goto unlock; |
| |
| rval = si4713_write_property(sdev, |
| SI4713_TX_RDS_PS_REPEAT_COUNT, |
| DEFAULT_RDS_PS_REPEAT_COUNT * 2); |
| if (rval < 0) |
| goto unlock; |
| } |
| |
| strncpy(sdev->rds_info.ps_name, ps_name, MAX_RDS_PS_NAME); |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static int si4713_set_rds_radio_text(struct si4713_device *sdev, char *rt) |
| { |
| int rval = 0, i; |
| u16 t_index = 0; |
| u8 b_index = 0, cr_inserted = 0; |
| s8 left; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (!sdev->power_state) |
| goto copy; |
| |
| rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_CLEAR, 0, 0, 0, &left); |
| if (rval < 0) |
| goto unlock; |
| |
| if (!strlen(rt)) |
| goto copy; |
| |
| do { |
| /* RDS spec says that if the last block isn't used, |
| * then apply a carriage return |
| */ |
| if (t_index < (RDS_RADIOTEXT_INDEX_MAX * |
| RDS_RADIOTEXT_BLK_SIZE)) { |
| for (i = 0; i < RDS_RADIOTEXT_BLK_SIZE; i++) { |
| if (!rt[t_index + i] || rt[t_index + i] == |
| RDS_CARRIAGE_RETURN) { |
| rt[t_index + i] = RDS_CARRIAGE_RETURN; |
| cr_inserted = 1; |
| break; |
| } |
| } |
| } |
| |
| rval = si4713_tx_rds_buff(sdev, RDS_BLOCK_LOAD, |
| compose_u16(RDS_RADIOTEXT_2A, b_index++), |
| compose_u16(rt[t_index], rt[t_index + 1]), |
| compose_u16(rt[t_index + 2], rt[t_index + 3]), |
| &left); |
| if (rval < 0) |
| goto unlock; |
| |
| t_index += RDS_RADIOTEXT_BLK_SIZE; |
| |
| if (cr_inserted) |
| break; |
| } while (left > 0); |
| |
| copy: |
| strncpy(sdev->rds_info.radio_text, rt, MAX_RDS_RADIO_TEXT); |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static int si4713_choose_econtrol_action(struct si4713_device *sdev, u32 id, |
| u32 **shadow, s32 *bit, s32 *mask, u16 *property, int *mul, |
| unsigned long **table, int *size) |
| { |
| s32 rval = 0; |
| |
| switch (id) { |
| /* FM_TX class controls */ |
| case V4L2_CID_RDS_TX_PI: |
| *property = SI4713_TX_RDS_PI; |
| *mul = 1; |
| *shadow = &sdev->rds_info.pi; |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: |
| *property = SI4713_TX_ACOMP_THRESHOLD; |
| *mul = 1; |
| *shadow = &sdev->acomp_info.threshold; |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_GAIN: |
| *property = SI4713_TX_ACOMP_GAIN; |
| *mul = 1; |
| *shadow = &sdev->acomp_info.gain; |
| break; |
| case V4L2_CID_PILOT_TONE_FREQUENCY: |
| *property = SI4713_TX_PILOT_FREQUENCY; |
| *mul = 1; |
| *shadow = &sdev->pilot_info.frequency; |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: |
| *property = SI4713_TX_ACOMP_ATTACK_TIME; |
| *mul = ATTACK_TIME_UNIT; |
| *shadow = &sdev->acomp_info.attack_time; |
| break; |
| case V4L2_CID_PILOT_TONE_DEVIATION: |
| *property = SI4713_TX_PILOT_DEVIATION; |
| *mul = 10; |
| *shadow = &sdev->pilot_info.deviation; |
| break; |
| case V4L2_CID_AUDIO_LIMITER_DEVIATION: |
| *property = SI4713_TX_AUDIO_DEVIATION; |
| *mul = 10; |
| *shadow = &sdev->limiter_info.deviation; |
| break; |
| case V4L2_CID_RDS_TX_DEVIATION: |
| *property = SI4713_TX_RDS_DEVIATION; |
| *mul = 1; |
| *shadow = &sdev->rds_info.deviation; |
| break; |
| |
| case V4L2_CID_RDS_TX_PTY: |
| *property = SI4713_TX_RDS_PS_MISC; |
| *bit = 5; |
| *mask = 0x1F << 5; |
| *shadow = &sdev->rds_info.pty; |
| break; |
| case V4L2_CID_AUDIO_LIMITER_ENABLED: |
| *property = SI4713_TX_ACOMP_ENABLE; |
| *bit = 1; |
| *mask = 1 << 1; |
| *shadow = &sdev->limiter_info.enabled; |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_ENABLED: |
| *property = SI4713_TX_ACOMP_ENABLE; |
| *bit = 0; |
| *mask = 1 << 0; |
| *shadow = &sdev->acomp_info.enabled; |
| break; |
| case V4L2_CID_PILOT_TONE_ENABLED: |
| *property = SI4713_TX_COMPONENT_ENABLE; |
| *bit = 0; |
| *mask = 1 << 0; |
| *shadow = &sdev->pilot_info.enabled; |
| break; |
| |
| case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: |
| *property = SI4713_TX_LIMITER_RELEASE_TIME; |
| *table = limiter_times; |
| *size = ARRAY_SIZE(limiter_times); |
| *shadow = &sdev->limiter_info.release_time; |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: |
| *property = SI4713_TX_ACOMP_RELEASE_TIME; |
| *table = acomp_rtimes; |
| *size = ARRAY_SIZE(acomp_rtimes); |
| *shadow = &sdev->acomp_info.release_time; |
| break; |
| case V4L2_CID_TUNE_PREEMPHASIS: |
| *property = SI4713_TX_PREEMPHASIS; |
| *table = preemphasis_values; |
| *size = ARRAY_SIZE(preemphasis_values); |
| *shadow = &sdev->preemphasis; |
| break; |
| |
| default: |
| rval = -EINVAL; |
| }; |
| |
| return rval; |
| } |
| |
| static int si4713_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc); |
| |
| /* write string property */ |
| static int si4713_write_econtrol_string(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| struct v4l2_queryctrl vqc; |
| int len; |
| s32 rval = 0; |
| |
| vqc.id = control->id; |
| rval = si4713_queryctrl(&sdev->sd, &vqc); |
| if (rval < 0) |
| goto exit; |
| |
| switch (control->id) { |
| case V4L2_CID_RDS_TX_PS_NAME: { |
| char ps_name[MAX_RDS_PS_NAME + 1]; |
| |
| len = control->size - 1; |
| if (len > MAX_RDS_PS_NAME) { |
| rval = -ERANGE; |
| goto exit; |
| } |
| rval = copy_from_user(ps_name, control->string, len); |
| if (rval) { |
| rval = -EFAULT; |
| goto exit; |
| } |
| ps_name[len] = '\0'; |
| |
| if (strlen(ps_name) % vqc.step) { |
| rval = -ERANGE; |
| goto exit; |
| } |
| |
| rval = si4713_set_rds_ps_name(sdev, ps_name); |
| } |
| break; |
| |
| case V4L2_CID_RDS_TX_RADIO_TEXT: { |
| char radio_text[MAX_RDS_RADIO_TEXT + 1]; |
| |
| len = control->size - 1; |
| if (len > MAX_RDS_RADIO_TEXT) { |
| rval = -ERANGE; |
| goto exit; |
| } |
| rval = copy_from_user(radio_text, control->string, len); |
| if (rval) { |
| rval = -EFAULT; |
| goto exit; |
| } |
| radio_text[len] = '\0'; |
| |
| if (strlen(radio_text) % vqc.step) { |
| rval = -ERANGE; |
| goto exit; |
| } |
| |
| rval = si4713_set_rds_radio_text(sdev, radio_text); |
| } |
| break; |
| |
| default: |
| rval = -EINVAL; |
| break; |
| }; |
| |
| exit: |
| return rval; |
| } |
| |
| static int validate_range(struct v4l2_subdev *sd, |
| struct v4l2_ext_control *control) |
| { |
| struct v4l2_queryctrl vqc; |
| int rval; |
| |
| vqc.id = control->id; |
| rval = si4713_queryctrl(sd, &vqc); |
| if (rval < 0) |
| goto exit; |
| |
| if (control->value < vqc.minimum || control->value > vqc.maximum) |
| rval = -ERANGE; |
| |
| exit: |
| return rval; |
| } |
| |
| /* properties which use tx_tune_power*/ |
| static int si4713_write_econtrol_tune(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| s32 rval = 0; |
| u8 power, antcap; |
| |
| rval = validate_range(&sdev->sd, control); |
| if (rval < 0) |
| goto exit; |
| |
| mutex_lock(&sdev->mutex); |
| |
| switch (control->id) { |
| case V4L2_CID_TUNE_POWER_LEVEL: |
| power = control->value; |
| antcap = sdev->antenna_capacitor; |
| break; |
| case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
| power = sdev->power_level; |
| antcap = control->value; |
| break; |
| default: |
| rval = -EINVAL; |
| goto unlock; |
| }; |
| |
| if (sdev->power_state) |
| rval = si4713_tx_tune_power(sdev, power, antcap); |
| |
| if (rval == 0) { |
| sdev->power_level = power; |
| sdev->antenna_capacitor = antcap; |
| } |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| exit: |
| return rval; |
| } |
| |
| static int si4713_write_econtrol_integers(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| s32 rval; |
| u32 *shadow = NULL, val = 0; |
| s32 bit = 0, mask = 0; |
| u16 property = 0; |
| int mul = 0; |
| unsigned long *table = NULL; |
| int size = 0; |
| |
| rval = validate_range(&sdev->sd, control); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_choose_econtrol_action(sdev, control->id, &shadow, &bit, |
| &mask, &property, &mul, &table, &size); |
| if (rval < 0) |
| goto exit; |
| |
| val = control->value; |
| if (mul) { |
| val = control->value / mul; |
| } else if (table) { |
| rval = usecs_to_dev(control->value, table, size); |
| if (rval < 0) |
| goto exit; |
| val = rval; |
| rval = 0; |
| } |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| if (mask) { |
| rval = si4713_read_property(sdev, property, &val); |
| if (rval < 0) |
| goto unlock; |
| val = set_bits(val, control->value, bit, mask); |
| } |
| |
| rval = si4713_write_property(sdev, property, val); |
| if (rval < 0) |
| goto unlock; |
| if (mask) |
| val = control->value; |
| } |
| |
| if (mul) { |
| *shadow = val * mul; |
| } else if (table) { |
| rval = dev_to_usecs(val, table, size); |
| if (rval < 0) |
| goto unlock; |
| *shadow = rval; |
| rval = 0; |
| } else { |
| *shadow = val; |
| } |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| exit: |
| return rval; |
| } |
| |
| static int si4713_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f); |
| static int si4713_s_modulator(struct v4l2_subdev *sd, struct v4l2_modulator *); |
| /* |
| * si4713_setup - Sets the device up with current configuration. |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_setup(struct si4713_device *sdev) |
| { |
| struct v4l2_ext_control ctrl; |
| struct v4l2_frequency f; |
| struct v4l2_modulator vm; |
| struct si4713_device *tmp; |
| int rval = 0; |
| |
| tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); |
| if (!tmp) |
| return -ENOMEM; |
| |
| /* Get a local copy to avoid race */ |
| mutex_lock(&sdev->mutex); |
| memcpy(tmp, sdev, sizeof(*sdev)); |
| mutex_unlock(&sdev->mutex); |
| |
| ctrl.id = V4L2_CID_RDS_TX_PI; |
| ctrl.value = tmp->rds_info.pi; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_COMPRESSION_THRESHOLD; |
| ctrl.value = tmp->acomp_info.threshold; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_COMPRESSION_GAIN; |
| ctrl.value = tmp->acomp_info.gain; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_PILOT_TONE_FREQUENCY; |
| ctrl.value = tmp->pilot_info.frequency; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME; |
| ctrl.value = tmp->acomp_info.attack_time; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_PILOT_TONE_DEVIATION; |
| ctrl.value = tmp->pilot_info.deviation; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_LIMITER_DEVIATION; |
| ctrl.value = tmp->limiter_info.deviation; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_RDS_TX_DEVIATION; |
| ctrl.value = tmp->rds_info.deviation; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_RDS_TX_PTY; |
| ctrl.value = tmp->rds_info.pty; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_LIMITER_ENABLED; |
| ctrl.value = tmp->limiter_info.enabled; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_COMPRESSION_ENABLED; |
| ctrl.value = tmp->acomp_info.enabled; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_PILOT_TONE_ENABLED; |
| ctrl.value = tmp->pilot_info.enabled; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_LIMITER_RELEASE_TIME; |
| ctrl.value = tmp->limiter_info.release_time; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME; |
| ctrl.value = tmp->acomp_info.release_time; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_TUNE_PREEMPHASIS; |
| ctrl.value = tmp->preemphasis; |
| rval |= si4713_write_econtrol_integers(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_RDS_TX_PS_NAME; |
| rval |= si4713_set_rds_ps_name(sdev, tmp->rds_info.ps_name); |
| |
| ctrl.id = V4L2_CID_RDS_TX_RADIO_TEXT; |
| rval |= si4713_set_rds_radio_text(sdev, tmp->rds_info.radio_text); |
| |
| /* Device procedure needs to set frequency first */ |
| f.frequency = tmp->frequency ? tmp->frequency : DEFAULT_FREQUENCY; |
| f.frequency = si4713_to_v4l2(f.frequency); |
| rval |= si4713_s_frequency(&sdev->sd, &f); |
| |
| ctrl.id = V4L2_CID_TUNE_POWER_LEVEL; |
| ctrl.value = tmp->power_level; |
| rval |= si4713_write_econtrol_tune(sdev, &ctrl); |
| |
| ctrl.id = V4L2_CID_TUNE_ANTENNA_CAPACITOR; |
| ctrl.value = tmp->antenna_capacitor; |
| rval |= si4713_write_econtrol_tune(sdev, &ctrl); |
| |
| vm.index = 0; |
| if (tmp->stereo) |
| vm.txsubchans = V4L2_TUNER_SUB_STEREO; |
| else |
| vm.txsubchans = V4L2_TUNER_SUB_MONO; |
| if (tmp->rds_info.enabled) |
| vm.txsubchans |= V4L2_TUNER_SUB_RDS; |
| si4713_s_modulator(&sdev->sd, &vm); |
| |
| kfree(tmp); |
| |
| return rval; |
| } |
| |
| /* |
| * si4713_initialize - Sets the device up with default configuration. |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_initialize(struct si4713_device *sdev) |
| { |
| int rval; |
| |
| rval = si4713_set_power_state(sdev, POWER_ON); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_checkrev(sdev); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_set_power_state(sdev, POWER_OFF); |
| if (rval < 0) |
| goto exit; |
| |
| mutex_lock(&sdev->mutex); |
| |
| sdev->rds_info.pi = DEFAULT_RDS_PI; |
| sdev->rds_info.pty = DEFAULT_RDS_PTY; |
| sdev->rds_info.deviation = DEFAULT_RDS_DEVIATION; |
| strlcpy(sdev->rds_info.ps_name, DEFAULT_RDS_PS_NAME, MAX_RDS_PS_NAME); |
| strlcpy(sdev->rds_info.radio_text, DEFAULT_RDS_RADIO_TEXT, |
| MAX_RDS_RADIO_TEXT); |
| sdev->rds_info.enabled = 1; |
| |
| sdev->limiter_info.release_time = DEFAULT_LIMITER_RTIME; |
| sdev->limiter_info.deviation = DEFAULT_LIMITER_DEV; |
| sdev->limiter_info.enabled = 1; |
| |
| sdev->pilot_info.deviation = DEFAULT_PILOT_DEVIATION; |
| sdev->pilot_info.frequency = DEFAULT_PILOT_FREQUENCY; |
| sdev->pilot_info.enabled = 1; |
| |
| sdev->acomp_info.release_time = DEFAULT_ACOMP_RTIME; |
| sdev->acomp_info.attack_time = DEFAULT_ACOMP_ATIME; |
| sdev->acomp_info.threshold = DEFAULT_ACOMP_THRESHOLD; |
| sdev->acomp_info.gain = DEFAULT_ACOMP_GAIN; |
| sdev->acomp_info.enabled = 1; |
| |
| sdev->frequency = DEFAULT_FREQUENCY; |
| sdev->preemphasis = DEFAULT_PREEMPHASIS; |
| sdev->mute = DEFAULT_MUTE; |
| sdev->power_level = DEFAULT_POWER_LEVEL; |
| sdev->antenna_capacitor = 0; |
| sdev->stereo = 1; |
| sdev->tune_rnl = DEFAULT_TUNE_RNL; |
| |
| mutex_unlock(&sdev->mutex); |
| |
| exit: |
| return rval; |
| } |
| |
| /* read string property */ |
| static int si4713_read_econtrol_string(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| s32 rval = 0; |
| |
| switch (control->id) { |
| case V4L2_CID_RDS_TX_PS_NAME: |
| if (strlen(sdev->rds_info.ps_name) + 1 > control->size) { |
| control->size = MAX_RDS_PS_NAME + 1; |
| rval = -ENOSPC; |
| goto exit; |
| } |
| rval = copy_to_user(control->string, sdev->rds_info.ps_name, |
| strlen(sdev->rds_info.ps_name) + 1); |
| if (rval) |
| rval = -EFAULT; |
| break; |
| |
| case V4L2_CID_RDS_TX_RADIO_TEXT: |
| if (strlen(sdev->rds_info.radio_text) + 1 > control->size) { |
| control->size = MAX_RDS_RADIO_TEXT + 1; |
| rval = -ENOSPC; |
| goto exit; |
| } |
| rval = copy_to_user(control->string, sdev->rds_info.radio_text, |
| strlen(sdev->rds_info.radio_text) + 1); |
| if (rval) |
| rval = -EFAULT; |
| break; |
| |
| default: |
| rval = -EINVAL; |
| break; |
| }; |
| |
| exit: |
| return rval; |
| } |
| |
| /* |
| * si4713_update_tune_status - update properties from tx_tune_status |
| * command. Must be called with sdev->mutex held. |
| * @sdev: si4713_device structure for the device we are communicating |
| */ |
| static int si4713_update_tune_status(struct si4713_device *sdev) |
| { |
| int rval; |
| u16 f = 0; |
| u8 p = 0, a = 0, n = 0; |
| |
| rval = si4713_tx_tune_status(sdev, 0x00, &f, &p, &a, &n); |
| |
| if (rval < 0) |
| goto exit; |
| |
| sdev->power_level = p; |
| sdev->antenna_capacitor = a; |
| sdev->tune_rnl = n; |
| |
| exit: |
| return rval; |
| } |
| |
| /* properties which use tx_tune_status */ |
| static int si4713_read_econtrol_tune(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| s32 rval = 0; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| rval = si4713_update_tune_status(sdev); |
| if (rval < 0) |
| goto unlock; |
| } |
| |
| switch (control->id) { |
| case V4L2_CID_TUNE_POWER_LEVEL: |
| control->value = sdev->power_level; |
| break; |
| case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
| control->value = sdev->antenna_capacitor; |
| break; |
| default: |
| rval = -EINVAL; |
| }; |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static int si4713_read_econtrol_integers(struct si4713_device *sdev, |
| struct v4l2_ext_control *control) |
| { |
| s32 rval; |
| u32 *shadow = NULL, val = 0; |
| s32 bit = 0, mask = 0; |
| u16 property = 0; |
| int mul = 0; |
| unsigned long *table = NULL; |
| int size = 0; |
| |
| rval = si4713_choose_econtrol_action(sdev, control->id, &shadow, &bit, |
| &mask, &property, &mul, &table, &size); |
| if (rval < 0) |
| goto exit; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| rval = si4713_read_property(sdev, property, &val); |
| if (rval < 0) |
| goto unlock; |
| |
| /* Keep negative values for threshold */ |
| if (control->id == V4L2_CID_AUDIO_COMPRESSION_THRESHOLD) |
| *shadow = (s16)val; |
| else if (mask) |
| *shadow = get_status_bit(val, bit, mask); |
| else if (mul) |
| *shadow = val * mul; |
| else |
| *shadow = dev_to_usecs(val, table, size); |
| } |
| |
| control->value = *shadow; |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| exit: |
| return rval; |
| } |
| |
| /* |
| * Video4Linux Subdev Interface |
| */ |
| /* si4713_s_ext_ctrls - set extended controls value */ |
| static int si4713_s_ext_ctrls(struct v4l2_subdev *sd, |
| struct v4l2_ext_controls *ctrls) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int i; |
| |
| if (ctrls->ctrl_class != V4L2_CTRL_CLASS_FM_TX) |
| return -EINVAL; |
| |
| for (i = 0; i < ctrls->count; i++) { |
| int err; |
| |
| switch ((ctrls->controls + i)->id) { |
| case V4L2_CID_RDS_TX_PS_NAME: |
| case V4L2_CID_RDS_TX_RADIO_TEXT: |
| err = si4713_write_econtrol_string(sdev, |
| ctrls->controls + i); |
| break; |
| case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
| case V4L2_CID_TUNE_POWER_LEVEL: |
| err = si4713_write_econtrol_tune(sdev, |
| ctrls->controls + i); |
| break; |
| default: |
| err = si4713_write_econtrol_integers(sdev, |
| ctrls->controls + i); |
| } |
| |
| if (err < 0) { |
| ctrls->error_idx = i; |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* si4713_g_ext_ctrls - get extended controls value */ |
| static int si4713_g_ext_ctrls(struct v4l2_subdev *sd, |
| struct v4l2_ext_controls *ctrls) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int i; |
| |
| if (ctrls->ctrl_class != V4L2_CTRL_CLASS_FM_TX) |
| return -EINVAL; |
| |
| for (i = 0; i < ctrls->count; i++) { |
| int err; |
| |
| switch ((ctrls->controls + i)->id) { |
| case V4L2_CID_RDS_TX_PS_NAME: |
| case V4L2_CID_RDS_TX_RADIO_TEXT: |
| err = si4713_read_econtrol_string(sdev, |
| ctrls->controls + i); |
| break; |
| case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
| case V4L2_CID_TUNE_POWER_LEVEL: |
| err = si4713_read_econtrol_tune(sdev, |
| ctrls->controls + i); |
| break; |
| default: |
| err = si4713_read_econtrol_integers(sdev, |
| ctrls->controls + i); |
| } |
| |
| if (err < 0) { |
| ctrls->error_idx = i; |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* si4713_queryctrl - enumerate control items */ |
| static int si4713_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) |
| { |
| int rval = 0; |
| |
| switch (qc->id) { |
| /* User class controls */ |
| case V4L2_CID_AUDIO_MUTE: |
| rval = v4l2_ctrl_query_fill(qc, 0, 1, 1, DEFAULT_MUTE); |
| break; |
| /* FM_TX class controls */ |
| case V4L2_CID_RDS_TX_PI: |
| rval = v4l2_ctrl_query_fill(qc, 0, 0xFFFF, 1, DEFAULT_RDS_PI); |
| break; |
| case V4L2_CID_RDS_TX_PTY: |
| rval = v4l2_ctrl_query_fill(qc, 0, 31, 1, DEFAULT_RDS_PTY); |
| break; |
| case V4L2_CID_RDS_TX_DEVIATION: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_RDS_DEVIATION, |
| 10, DEFAULT_RDS_DEVIATION); |
| break; |
| case V4L2_CID_RDS_TX_PS_NAME: |
| /* |
| * Report step as 8. From RDS spec, psname |
| * should be 8. But there are receivers which scroll strings |
| * sized as 8xN. |
| */ |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_RDS_PS_NAME, 8, 0); |
| break; |
| case V4L2_CID_RDS_TX_RADIO_TEXT: |
| /* |
| * Report step as 32 (2A block). From RDS spec, |
| * radio text should be 32 for 2A block. But there are receivers |
| * which scroll strings sized as 32xN. Setting default to 32. |
| */ |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_RDS_RADIO_TEXT, 32, 0); |
| break; |
| |
| case V4L2_CID_AUDIO_LIMITER_ENABLED: |
| rval = v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); |
| break; |
| case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: |
| rval = v4l2_ctrl_query_fill(qc, 250, MAX_LIMITER_RELEASE_TIME, |
| 50, DEFAULT_LIMITER_RTIME); |
| break; |
| case V4L2_CID_AUDIO_LIMITER_DEVIATION: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_LIMITER_DEVIATION, |
| 10, DEFAULT_LIMITER_DEV); |
| break; |
| |
| case V4L2_CID_AUDIO_COMPRESSION_ENABLED: |
| rval = v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_GAIN: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_ACOMP_GAIN, 1, |
| DEFAULT_ACOMP_GAIN); |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: |
| rval = v4l2_ctrl_query_fill(qc, MIN_ACOMP_THRESHOLD, |
| MAX_ACOMP_THRESHOLD, 1, |
| DEFAULT_ACOMP_THRESHOLD); |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_ACOMP_ATTACK_TIME, |
| 500, DEFAULT_ACOMP_ATIME); |
| break; |
| case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: |
| rval = v4l2_ctrl_query_fill(qc, 100000, MAX_ACOMP_RELEASE_TIME, |
| 100000, DEFAULT_ACOMP_RTIME); |
| break; |
| |
| case V4L2_CID_PILOT_TONE_ENABLED: |
| rval = v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); |
| break; |
| case V4L2_CID_PILOT_TONE_DEVIATION: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_PILOT_DEVIATION, |
| 10, DEFAULT_PILOT_DEVIATION); |
| break; |
| case V4L2_CID_PILOT_TONE_FREQUENCY: |
| rval = v4l2_ctrl_query_fill(qc, 0, MAX_PILOT_FREQUENCY, |
| 1, DEFAULT_PILOT_FREQUENCY); |
| break; |
| |
| case V4L2_CID_TUNE_PREEMPHASIS: |
| rval = v4l2_ctrl_query_fill(qc, V4L2_PREEMPHASIS_DISABLED, |
| V4L2_PREEMPHASIS_75_uS, 1, |
| V4L2_PREEMPHASIS_50_uS); |
| break; |
| case V4L2_CID_TUNE_POWER_LEVEL: |
| rval = v4l2_ctrl_query_fill(qc, 0, 120, 1, DEFAULT_POWER_LEVEL); |
| break; |
| case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
| rval = v4l2_ctrl_query_fill(qc, 0, 191, 1, 0); |
| break; |
| default: |
| rval = -EINVAL; |
| break; |
| }; |
| |
| return rval; |
| } |
| |
| /* si4713_g_ctrl - get the value of a control */ |
| static int si4713_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| |
| if (!sdev) |
| return -ENODEV; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| rval = si4713_read_property(sdev, SI4713_TX_LINE_INPUT_MUTE, |
| &sdev->mute); |
| |
| if (rval < 0) |
| goto unlock; |
| } |
| |
| switch (ctrl->id) { |
| case V4L2_CID_AUDIO_MUTE: |
| ctrl->value = get_mute(sdev->mute); |
| break; |
| } |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| /* si4713_s_ctrl - set the value of a control */ |
| static int si4713_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| |
| if (!sdev) |
| return -ENODEV; |
| |
| switch (ctrl->id) { |
| case V4L2_CID_AUDIO_MUTE: |
| if (ctrl->value) { |
| rval = si4713_set_mute(sdev, ctrl->value); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_set_power_state(sdev, POWER_DOWN); |
| } else { |
| rval = si4713_set_power_state(sdev, POWER_UP); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_setup(sdev); |
| if (rval < 0) |
| goto exit; |
| |
| rval = si4713_set_mute(sdev, ctrl->value); |
| } |
| break; |
| } |
| |
| exit: |
| return rval; |
| } |
| |
| /* si4713_ioctl - deal with private ioctls (only rnl for now) */ |
| long si4713_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| struct si4713_rnl *rnl = arg; |
| u16 frequency; |
| int rval = 0; |
| |
| if (!arg) |
| return -EINVAL; |
| |
| mutex_lock(&sdev->mutex); |
| switch (cmd) { |
| case SI4713_IOC_MEASURE_RNL: |
| frequency = v4l2_to_si4713(rnl->frequency); |
| |
| if (sdev->power_state) { |
| /* Set desired measurement frequency */ |
| rval = si4713_tx_tune_measure(sdev, frequency, 0); |
| if (rval < 0) |
| goto unlock; |
| /* get results from tune status */ |
| rval = si4713_update_tune_status(sdev); |
| if (rval < 0) |
| goto unlock; |
| } |
| rnl->rnl = sdev->tune_rnl; |
| break; |
| |
| default: |
| /* nothing */ |
| rval = -ENOIOCTLCMD; |
| } |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static const struct v4l2_subdev_core_ops si4713_subdev_core_ops = { |
| .queryctrl = si4713_queryctrl, |
| .g_ext_ctrls = si4713_g_ext_ctrls, |
| .s_ext_ctrls = si4713_s_ext_ctrls, |
| .g_ctrl = si4713_g_ctrl, |
| .s_ctrl = si4713_s_ctrl, |
| .ioctl = si4713_ioctl, |
| }; |
| |
| /* si4713_g_modulator - get modulator attributes */ |
| static int si4713_g_modulator(struct v4l2_subdev *sd, struct v4l2_modulator *vm) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| |
| if (!sdev) { |
| rval = -ENODEV; |
| goto exit; |
| } |
| |
| if (vm->index > 0) { |
| rval = -EINVAL; |
| goto exit; |
| } |
| |
| strncpy(vm->name, "FM Modulator", 32); |
| vm->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW | |
| V4L2_TUNER_CAP_RDS; |
| |
| /* Report current frequency range limits */ |
| vm->rangelow = si4713_to_v4l2(FREQ_RANGE_LOW); |
| vm->rangehigh = si4713_to_v4l2(FREQ_RANGE_HIGH); |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| u32 comp_en = 0; |
| |
| rval = si4713_read_property(sdev, SI4713_TX_COMPONENT_ENABLE, |
| &comp_en); |
| if (rval < 0) |
| goto unlock; |
| |
| sdev->stereo = get_status_bit(comp_en, 1, 1 << 1); |
| sdev->rds_info.enabled = get_status_bit(comp_en, 2, 1 << 2); |
| } |
| |
| /* Report current audio mode: mono or stereo */ |
| if (sdev->stereo) |
| vm->txsubchans = V4L2_TUNER_SUB_STEREO; |
| else |
| vm->txsubchans = V4L2_TUNER_SUB_MONO; |
| |
| /* Report rds feature status */ |
| if (sdev->rds_info.enabled) |
| vm->txsubchans |= V4L2_TUNER_SUB_RDS; |
| else |
| vm->txsubchans &= ~V4L2_TUNER_SUB_RDS; |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| exit: |
| return rval; |
| } |
| |
| /* si4713_s_modulator - set modulator attributes */ |
| static int si4713_s_modulator(struct v4l2_subdev *sd, struct v4l2_modulator *vm) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| u16 stereo, rds; |
| u32 p; |
| |
| if (!sdev) |
| return -ENODEV; |
| |
| if (vm->index > 0) |
| return -EINVAL; |
| |
| /* Set audio mode: mono or stereo */ |
| if (vm->txsubchans & V4L2_TUNER_SUB_STEREO) |
| stereo = 1; |
| else if (vm->txsubchans & V4L2_TUNER_SUB_MONO) |
| stereo = 0; |
| else |
| return -EINVAL; |
| |
| rds = !!(vm->txsubchans & V4L2_TUNER_SUB_RDS); |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| rval = si4713_read_property(sdev, |
| SI4713_TX_COMPONENT_ENABLE, &p); |
| if (rval < 0) |
| goto unlock; |
| |
| p = set_bits(p, stereo, 1, 1 << 1); |
| p = set_bits(p, rds, 2, 1 << 2); |
| |
| rval = si4713_write_property(sdev, |
| SI4713_TX_COMPONENT_ENABLE, p); |
| if (rval < 0) |
| goto unlock; |
| } |
| |
| sdev->stereo = stereo; |
| sdev->rds_info.enabled = rds; |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| /* si4713_g_frequency - get tuner or modulator radio frequency */ |
| static int si4713_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| |
| f->type = V4L2_TUNER_RADIO; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| u16 freq; |
| u8 p, a, n; |
| |
| rval = si4713_tx_tune_status(sdev, 0x00, &freq, &p, &a, &n); |
| if (rval < 0) |
| goto unlock; |
| |
| sdev->frequency = freq; |
| } |
| |
| f->frequency = si4713_to_v4l2(sdev->frequency); |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| /* si4713_s_frequency - set tuner or modulator radio frequency */ |
| static int si4713_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) |
| { |
| struct si4713_device *sdev = to_si4713_device(sd); |
| int rval = 0; |
| u16 frequency = v4l2_to_si4713(f->frequency); |
| |
| /* Check frequency range */ |
| if (frequency < FREQ_RANGE_LOW || frequency > FREQ_RANGE_HIGH) |
| return -EDOM; |
| |
| mutex_lock(&sdev->mutex); |
| |
| if (sdev->power_state) { |
| rval = si4713_tx_tune_freq(sdev, frequency); |
| if (rval < 0) |
| goto unlock; |
| frequency = rval; |
| rval = 0; |
| } |
| sdev->frequency = frequency; |
| f->frequency = si4713_to_v4l2(frequency); |
| |
| unlock: |
| mutex_unlock(&sdev->mutex); |
| return rval; |
| } |
| |
| static const struct v4l2_subdev_tuner_ops si4713_subdev_tuner_ops = { |
| .g_frequency = si4713_g_frequency, |
| .s_frequency = si4713_s_frequency, |
| .g_modulator = si4713_g_modulator, |
| .s_modulator = si4713_s_modulator, |
| }; |
| |
| static const struct v4l2_subdev_ops si4713_subdev_ops = { |
| .core = &si4713_subdev_core_ops, |
| .tuner = &si4713_subdev_tuner_ops, |
| }; |
| |
| /* |
| * I2C driver interface |
| */ |
| /* si4713_probe - probe for the device */ |
| static int si4713_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct si4713_device *sdev; |
| int rval; |
| |
| sdev = kzalloc(sizeof *sdev, GFP_KERNEL); |
| if (!sdev) { |
| dev_err(&client->dev, "Failed to alloc video device.\n"); |
| rval = -ENOMEM; |
| goto exit; |
| } |
| |
| sdev->platform_data = client->dev.platform_data; |
| if (!sdev->platform_data) { |
| v4l2_err(&sdev->sd, "No platform data registered.\n"); |
| rval = -ENODEV; |
| goto free_sdev; |
| } |
| |
| v4l2_i2c_subdev_init(&sdev->sd, client, &si4713_subdev_ops); |
| |
| mutex_init(&sdev->mutex); |
| init_completion(&sdev->work); |
| |
| if (client->irq) { |
| rval = request_irq(client->irq, |
| si4713_handler, IRQF_TRIGGER_FALLING | IRQF_DISABLED, |
| client->name, sdev); |
| if (rval < 0) { |
| v4l2_err(&sdev->sd, "Could not request IRQ\n"); |
| goto free_sdev; |
| } |
| v4l2_dbg(1, debug, &sdev->sd, "IRQ requested.\n"); |
| } else { |
| v4l2_warn(&sdev->sd, "IRQ not configured. Using timeouts.\n"); |
| } |
| |
| rval = si4713_initialize(sdev); |
| if (rval < 0) { |
| v4l2_err(&sdev->sd, "Failed to probe device information.\n"); |
| goto free_irq; |
| } |
| |
| return 0; |
| |
| free_irq: |
| if (client->irq) |
| free_irq(client->irq, sdev); |
| free_sdev: |
| kfree(sdev); |
| exit: |
| return rval; |
| } |
| |
| /* si4713_remove - remove the device */ |
| static int si4713_remove(struct i2c_client *client) |
| { |
| struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| struct si4713_device *sdev = to_si4713_device(sd); |
| |
| if (sdev->power_state) |
| si4713_set_power_state(sdev, POWER_DOWN); |
| |
| if (client->irq > 0) |
| free_irq(client->irq, sdev); |
| |
| v4l2_device_unregister_subdev(sd); |
| |
| kfree(sdev); |
| |
| return 0; |
| } |
| |
| /* si4713_i2c_driver - i2c driver interface */ |
| static const struct i2c_device_id si4713_id[] = { |
| { "si4713" , 0 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(i2c, si4713_id); |
| |
| static struct i2c_driver si4713_i2c_driver = { |
| .driver = { |
| .name = "si4713", |
| }, |
| .probe = si4713_probe, |
| .remove = si4713_remove, |
| .id_table = si4713_id, |
| }; |
| |
| /* Module Interface */ |
| static int __init si4713_module_init(void) |
| { |
| return i2c_add_driver(&si4713_i2c_driver); |
| } |
| |
| static void __exit si4713_module_exit(void) |
| { |
| i2c_del_driver(&si4713_i2c_driver); |
| } |
| |
| module_init(si4713_module_init); |
| module_exit(si4713_module_exit); |
| |