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linuxdebug/drivers/media/radio/radio-wl1273.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for the Texas Instruments WL1273 FM radio.
*
* Copyright (C) 2011 Nokia Corporation
* Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#define DRIVER_DESC "Wl1273 FM Radio"
#define WL1273_POWER_SET_OFF 0
#define WL1273_POWER_SET_FM BIT(0)
#define WL1273_POWER_SET_RDS BIT(1)
#define WL1273_POWER_SET_RETENTION BIT(4)
#define WL1273_PUPD_SET_OFF 0x00
#define WL1273_PUPD_SET_ON 0x01
#define WL1273_PUPD_SET_RETENTION 0x10
#define WL1273_FREQ(x) (x * 10000 / 625)
#define WL1273_INV_FREQ(x) (x * 625 / 10000)
/*
* static int radio_nr - The number of the radio device
*
* The default is 0.
*/
static int radio_nr;
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(radio_nr, "The number of the radio device. Default = 0");
struct wl1273_device {
char *bus_type;
u8 forbidden;
unsigned int preemphasis;
unsigned int spacing;
unsigned int tx_power;
unsigned int rx_frequency;
unsigned int tx_frequency;
unsigned int rangelow;
unsigned int rangehigh;
unsigned int band;
bool stereo;
/* RDS */
unsigned int rds_on;
wait_queue_head_t read_queue;
struct mutex lock; /* for serializing fm radio operations */
struct completion busy;
unsigned char *buffer;
unsigned int buf_size;
unsigned int rd_index;
unsigned int wr_index;
/* Selected interrupts */
u16 irq_flags;
u16 irq_received;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_device v4l2dev;
struct video_device videodev;
struct device *dev;
struct wl1273_core *core;
struct file *owner;
char *write_buf;
unsigned int rds_users;
};
#define WL1273_IRQ_MASK (WL1273_FR_EVENT | \
WL1273_POW_ENB_EVENT)
/*
* static unsigned int rds_buf - the number of RDS buffer blocks used.
*
* The default number is 100.
*/
static unsigned int rds_buf = 100;
module_param(rds_buf, uint, 0);
MODULE_PARM_DESC(rds_buf, "Number of RDS buffer entries. Default = 100");
static int wl1273_fm_write_fw(struct wl1273_core *core,
__u8 *fw, int len)
{
struct i2c_client *client = core->client;
struct i2c_msg msg;
int i, r = 0;
msg.addr = client->addr;
msg.flags = 0;
for (i = 0; i <= len; i++) {
msg.len = fw[0];
msg.buf = fw + 1;
fw += msg.len + 1;
dev_dbg(&client->dev, "%s:len[%d]: %d\n", __func__, i, msg.len);
r = i2c_transfer(client->adapter, &msg, 1);
if (r < 0 && i < len + 1)
break;
}
dev_dbg(&client->dev, "%s: i: %d\n", __func__, i);
dev_dbg(&client->dev, "%s: len + 1: %d\n", __func__, len + 1);
/* Last transfer always fails. */
if (i == len || r == 1)
r = 0;
return r;
}
#define WL1273_FIFO_HAS_DATA(status) (1 << 5 & status)
#define WL1273_RDS_CORRECTABLE_ERROR (1 << 3)
#define WL1273_RDS_UNCORRECTABLE_ERROR (1 << 4)
static int wl1273_fm_rds(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
struct i2c_client *client = core->client;
u16 val;
u8 b0 = WL1273_RDS_DATA_GET, status;
struct v4l2_rds_data rds = { 0, 0, 0 };
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.buf = &b0,
.len = 1,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.buf = (u8 *) &rds,
.len = sizeof(rds),
}
};
int r;
if (core->mode != WL1273_MODE_RX)
return 0;
r = core->read(core, WL1273_RDS_SYNC_GET, &val);
if (r)
return r;
if ((val & 0x01) == 0) {
/* RDS decoder not synchronized */
return -EAGAIN;
}
/* copy all four RDS blocks to internal buffer */
do {
r = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (r != ARRAY_SIZE(msg)) {
dev_err(radio->dev, WL1273_FM_DRIVER_NAME
": %s: read_rds error r == %i)\n",
__func__, r);
}
status = rds.block;
if (!WL1273_FIFO_HAS_DATA(status))
break;
/* copy bits 0-2 (the block ID) to bits 3-5 */
rds.block = V4L2_RDS_BLOCK_MSK & status;
rds.block |= rds.block << 3;
/* copy the error bits to standard positions */
if (WL1273_RDS_UNCORRECTABLE_ERROR & status) {
rds.block |= V4L2_RDS_BLOCK_ERROR;
rds.block &= ~V4L2_RDS_BLOCK_CORRECTED;
} else if (WL1273_RDS_CORRECTABLE_ERROR & status) {
rds.block &= ~V4L2_RDS_BLOCK_ERROR;
rds.block |= V4L2_RDS_BLOCK_CORRECTED;
}
/* copy RDS block to internal buffer */
memcpy(&radio->buffer[radio->wr_index], &rds, RDS_BLOCK_SIZE);
radio->wr_index += 3;
/* wrap write pointer */
if (radio->wr_index >= radio->buf_size)
radio->wr_index = 0;
/* check for overflow & start over */
if (radio->wr_index == radio->rd_index) {
dev_dbg(radio->dev, "RDS OVERFLOW");
radio->rd_index = 0;
radio->wr_index = 0;
break;
}
} while (WL1273_FIFO_HAS_DATA(status));
/* wake up read queue */
if (radio->wr_index != radio->rd_index)
wake_up_interruptible(&radio->read_queue);
return 0;
}
static irqreturn_t wl1273_fm_irq_thread_handler(int irq, void *dev_id)
{
struct wl1273_device *radio = dev_id;
struct wl1273_core *core = radio->core;
u16 flags;
int r;
r = core->read(core, WL1273_FLAG_GET, &flags);
if (r)
goto out;
if (flags & WL1273_BL_EVENT) {
radio->irq_received = flags;
dev_dbg(radio->dev, "IRQ: BL\n");
}
if (flags & WL1273_RDS_EVENT) {
msleep(200);
wl1273_fm_rds(radio);
}
if (flags & WL1273_BBLK_EVENT)
dev_dbg(radio->dev, "IRQ: BBLK\n");
if (flags & WL1273_LSYNC_EVENT)
dev_dbg(radio->dev, "IRQ: LSYNC\n");
if (flags & WL1273_LEV_EVENT) {
u16 level;
r = core->read(core, WL1273_RSSI_LVL_GET, &level);
if (r)
goto out;
if (level > 14)
dev_dbg(radio->dev, "IRQ: LEV: 0x%x04\n", level);
}
if (flags & WL1273_IFFR_EVENT)
dev_dbg(radio->dev, "IRQ: IFFR\n");
if (flags & WL1273_PI_EVENT)
dev_dbg(radio->dev, "IRQ: PI\n");
if (flags & WL1273_PD_EVENT)
dev_dbg(radio->dev, "IRQ: PD\n");
if (flags & WL1273_STIC_EVENT)
dev_dbg(radio->dev, "IRQ: STIC\n");
if (flags & WL1273_MAL_EVENT)
dev_dbg(radio->dev, "IRQ: MAL\n");
if (flags & WL1273_POW_ENB_EVENT) {
complete(&radio->busy);
dev_dbg(radio->dev, "NOT BUSY\n");
dev_dbg(radio->dev, "IRQ: POW_ENB\n");
}
if (flags & WL1273_SCAN_OVER_EVENT)
dev_dbg(radio->dev, "IRQ: SCAN_OVER\n");
if (flags & WL1273_ERROR_EVENT)
dev_dbg(radio->dev, "IRQ: ERROR\n");
if (flags & WL1273_FR_EVENT) {
u16 freq;
dev_dbg(radio->dev, "IRQ: FR:\n");
if (core->mode == WL1273_MODE_RX) {
r = core->write(core, WL1273_TUNER_MODE_SET,
TUNER_MODE_STOP_SEARCH);
if (r) {
dev_err(radio->dev,
"%s: TUNER_MODE_SET fails: %d\n",
__func__, r);
goto out;
}
r = core->read(core, WL1273_FREQ_SET, &freq);
if (r)
goto out;
if (radio->band == WL1273_BAND_JAPAN)
radio->rx_frequency = WL1273_BAND_JAPAN_LOW +
freq * 50;
else
radio->rx_frequency = WL1273_BAND_OTHER_LOW +
freq * 50;
/*
* The driver works better with this msleep,
* the documentation doesn't mention it.
*/
usleep_range(10000, 15000);
dev_dbg(radio->dev, "%dkHz\n", radio->rx_frequency);
} else {
r = core->read(core, WL1273_CHANL_SET, &freq);
if (r)
goto out;
dev_dbg(radio->dev, "%dkHz\n", freq);
}
dev_dbg(radio->dev, "%s: NOT BUSY\n", __func__);
}
out:
core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
complete(&radio->busy);
return IRQ_HANDLED;
}
static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq)
{
struct wl1273_core *core = radio->core;
int r = 0;
unsigned long t;
if (freq < WL1273_BAND_TX_LOW) {
dev_err(radio->dev,
"Frequency out of range: %d < %d\n", freq,
WL1273_BAND_TX_LOW);
return -ERANGE;
}
if (freq > WL1273_BAND_TX_HIGH) {
dev_err(radio->dev,
"Frequency out of range: %d > %d\n", freq,
WL1273_BAND_TX_HIGH);
return -ERANGE;
}
/*
* The driver works better with this sleep,
* the documentation doesn't mention it.
*/
usleep_range(5000, 10000);
dev_dbg(radio->dev, "%s: freq: %d kHz\n", __func__, freq);
/* Set the current tx channel */
r = core->write(core, WL1273_CHANL_SET, freq / 10);
if (r)
return r;
reinit_completion(&radio->busy);
/* wait for the FR IRQ */
t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
if (!t)
return -ETIMEDOUT;
dev_dbg(radio->dev, "WL1273_CHANL_SET: %lu\n", t);
/* Enable the output power */
r = core->write(core, WL1273_POWER_ENB_SET, 1);
if (r)
return r;
reinit_completion(&radio->busy);
/* wait for the POWER_ENB IRQ */
t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
if (!t)
return -ETIMEDOUT;
radio->tx_frequency = freq;
dev_dbg(radio->dev, "WL1273_POWER_ENB_SET: %lu\n", t);
return 0;
}
static int wl1273_fm_set_rx_freq(struct wl1273_device *radio, unsigned int freq)
{
struct wl1273_core *core = radio->core;
int r, f;
unsigned long t;
if (freq < radio->rangelow) {
dev_err(radio->dev,
"Frequency out of range: %d < %d\n", freq,
radio->rangelow);
r = -ERANGE;
goto err;
}
if (freq > radio->rangehigh) {
dev_err(radio->dev,
"Frequency out of range: %d > %d\n", freq,
radio->rangehigh);
r = -ERANGE;
goto err;
}
dev_dbg(radio->dev, "%s: %dkHz\n", __func__, freq);
core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
if (radio->band == WL1273_BAND_JAPAN)
f = (freq - WL1273_BAND_JAPAN_LOW) / 50;
else
f = (freq - WL1273_BAND_OTHER_LOW) / 50;
r = core->write(core, WL1273_FREQ_SET, f);
if (r) {
dev_err(radio->dev, "FREQ_SET fails\n");
goto err;
}
r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_PRESET);
if (r) {
dev_err(radio->dev, "TUNER_MODE_SET fails\n");
goto err;
}
reinit_completion(&radio->busy);
t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
if (!t) {
dev_err(radio->dev, "%s: TIMEOUT\n", __func__);
return -ETIMEDOUT;
}
radio->rd_index = 0;
radio->wr_index = 0;
radio->rx_frequency = freq;
return 0;
err:
return r;
}
static int wl1273_fm_get_freq(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
unsigned int freq;
u16 f;
int r;
if (core->mode == WL1273_MODE_RX) {
r = core->read(core, WL1273_FREQ_SET, &f);
if (r)
return r;
dev_dbg(radio->dev, "Freq get: 0x%04x\n", f);
if (radio->band == WL1273_BAND_JAPAN)
freq = WL1273_BAND_JAPAN_LOW + 50 * f;
else
freq = WL1273_BAND_OTHER_LOW + 50 * f;
} else {
r = core->read(core, WL1273_CHANL_SET, &f);
if (r)
return r;
freq = f * 10;
}
return freq;
}
/**
* wl1273_fm_upload_firmware_patch() - Upload the firmware.
* @radio: A pointer to the device struct.
*
* The firmware file consists of arrays of bytes where the first byte
* gives the array length. The first byte in the file gives the
* number of these arrays.
*/
static int wl1273_fm_upload_firmware_patch(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
unsigned int packet_num;
const struct firmware *fw_p;
const char *fw_name = "radio-wl1273-fw.bin";
struct device *dev = radio->dev;
__u8 *ptr;
int r;
dev_dbg(dev, "%s:\n", __func__);
/*
* Uploading the firmware patch is not always necessary,
* so we only print an info message.
*/
if (request_firmware(&fw_p, fw_name, dev)) {
dev_info(dev, "%s - %s not found\n", __func__, fw_name);
return 0;
}
ptr = (__u8 *) fw_p->data;
packet_num = ptr[0];
dev_dbg(dev, "%s: packets: %d\n", __func__, packet_num);
r = wl1273_fm_write_fw(core, ptr + 1, packet_num);
if (r) {
dev_err(dev, "FW upload error: %d\n", r);
goto out;
}
/* ignore possible error here */
core->write(core, WL1273_RESET, 0);
dev_dbg(dev, "%s - download OK, r: %d\n", __func__, r);
out:
release_firmware(fw_p);
return r;
}
static int wl1273_fm_stop(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
if (core->mode == WL1273_MODE_RX) {
int r = core->write(core, WL1273_POWER_SET,
WL1273_POWER_SET_OFF);
if (r)
dev_err(radio->dev, "%s: POWER_SET fails: %d\n",
__func__, r);
} else if (core->mode == WL1273_MODE_TX) {
int r = core->write(core, WL1273_PUPD_SET,
WL1273_PUPD_SET_OFF);
if (r)
dev_err(radio->dev,
"%s: PUPD_SET fails: %d\n", __func__, r);
}
if (core->pdata->disable) {
core->pdata->disable();
dev_dbg(radio->dev, "Back to reset\n");
}
return 0;
}
static int wl1273_fm_start(struct wl1273_device *radio, int new_mode)
{
struct wl1273_core *core = radio->core;
struct wl1273_fm_platform_data *pdata = core->pdata;
struct device *dev = radio->dev;
int r = -EINVAL;
if (pdata->enable && core->mode == WL1273_MODE_OFF) {
dev_dbg(radio->dev, "Out of reset\n");
pdata->enable();
msleep(250);
}
if (new_mode == WL1273_MODE_RX) {
u16 val = WL1273_POWER_SET_FM;
if (radio->rds_on)
val |= WL1273_POWER_SET_RDS;
/* If this fails try again */
r = core->write(core, WL1273_POWER_SET, val);
if (r) {
msleep(100);
r = core->write(core, WL1273_POWER_SET, val);
if (r) {
dev_err(dev, "%s: POWER_SET fails\n", __func__);
goto fail;
}
}
/* rds buffer configuration */
radio->wr_index = 0;
radio->rd_index = 0;
} else if (new_mode == WL1273_MODE_TX) {
/* If this fails try again once */
r = core->write(core, WL1273_PUPD_SET, WL1273_PUPD_SET_ON);
if (r) {
msleep(100);
r = core->write(core, WL1273_PUPD_SET,
WL1273_PUPD_SET_ON);
if (r) {
dev_err(dev, "%s: PUPD_SET fails\n", __func__);
goto fail;
}
}
if (radio->rds_on) {
r = core->write(core, WL1273_RDS_DATA_ENB, 1);
if (r) {
dev_err(dev, "%s: RDS_DATA_ENB ON fails\n",
__func__);
goto fail;
}
} else {
r = core->write(core, WL1273_RDS_DATA_ENB, 0);
if (r) {
dev_err(dev, "%s: RDS_DATA_ENB OFF fails\n",
__func__);
goto fail;
}
}
} else {
dev_warn(dev, "%s: Illegal mode.\n", __func__);
}
if (core->mode == WL1273_MODE_OFF) {
r = wl1273_fm_upload_firmware_patch(radio);
if (r)
dev_warn(dev, "Firmware upload failed.\n");
/*
* Sometimes the chip is in a wrong power state at this point.
* So we set the power once again.
*/
if (new_mode == WL1273_MODE_RX) {
u16 val = WL1273_POWER_SET_FM;
if (radio->rds_on)
val |= WL1273_POWER_SET_RDS;
r = core->write(core, WL1273_POWER_SET, val);
if (r) {
dev_err(dev, "%s: POWER_SET fails\n", __func__);
goto fail;
}
} else if (new_mode == WL1273_MODE_TX) {
r = core->write(core, WL1273_PUPD_SET,
WL1273_PUPD_SET_ON);
if (r) {
dev_err(dev, "%s: PUPD_SET fails\n", __func__);
goto fail;
}
}
}
return 0;
fail:
if (pdata->disable)
pdata->disable();
dev_dbg(dev, "%s: return: %d\n", __func__, r);
return r;
}
static int wl1273_fm_suspend(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
int r;
/* Cannot go from OFF to SUSPENDED */
if (core->mode == WL1273_MODE_RX)
r = core->write(core, WL1273_POWER_SET,
WL1273_POWER_SET_RETENTION);
else if (core->mode == WL1273_MODE_TX)
r = core->write(core, WL1273_PUPD_SET,
WL1273_PUPD_SET_RETENTION);
else
r = -EINVAL;
if (r) {
dev_err(radio->dev, "%s: POWER_SET fails: %d\n", __func__, r);
goto out;
}
out:
return r;
}
static int wl1273_fm_set_mode(struct wl1273_device *radio, int mode)
{
struct wl1273_core *core = radio->core;
struct device *dev = radio->dev;
int old_mode;
int r;
dev_dbg(dev, "%s\n", __func__);
dev_dbg(dev, "Forbidden modes: 0x%02x\n", radio->forbidden);
old_mode = core->mode;
if (mode & radio->forbidden) {
r = -EPERM;
goto out;
}
switch (mode) {
case WL1273_MODE_RX:
case WL1273_MODE_TX:
r = wl1273_fm_start(radio, mode);
if (r) {
dev_err(dev, "%s: Cannot start.\n", __func__);
wl1273_fm_stop(radio);
goto out;
}
core->mode = mode;
r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
if (r) {
dev_err(dev, "INT_MASK_SET fails.\n");
goto out;
}
/* remember previous settings */
if (mode == WL1273_MODE_RX) {
r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
if (r) {
dev_err(dev, "set freq fails: %d.\n", r);
goto out;
}
r = core->set_volume(core, core->volume);
if (r) {
dev_err(dev, "set volume fails: %d.\n", r);
goto out;
}
dev_dbg(dev, "%s: Set vol: %d.\n", __func__,
core->volume);
} else {
r = wl1273_fm_set_tx_freq(radio, radio->tx_frequency);
if (r) {
dev_err(dev, "set freq fails: %d.\n", r);
goto out;
}
}
dev_dbg(radio->dev, "%s: Set audio mode.\n", __func__);
r = core->set_audio(core, core->audio_mode);
if (r)
dev_err(dev, "Cannot set audio mode.\n");
break;
case WL1273_MODE_OFF:
r = wl1273_fm_stop(radio);
if (r)
dev_err(dev, "%s: Off fails: %d\n", __func__, r);
else
core->mode = WL1273_MODE_OFF;
break;
case WL1273_MODE_SUSPENDED:
r = wl1273_fm_suspend(radio);
if (r)
dev_err(dev, "%s: Suspend fails: %d\n", __func__, r);
else
core->mode = WL1273_MODE_SUSPENDED;
break;
default:
dev_err(dev, "%s: Unknown mode: %d\n", __func__, mode);
r = -EINVAL;
break;
}
out:
if (r)
core->mode = old_mode;
return r;
}
static int wl1273_fm_set_seek(struct wl1273_device *radio,
unsigned int wrap_around,
unsigned int seek_upward,
int level)
{
struct wl1273_core *core = radio->core;
int r = 0;
unsigned int dir = (seek_upward == 0) ? 0 : 1;
unsigned int f;
f = radio->rx_frequency;
dev_dbg(radio->dev, "rx_frequency: %d\n", f);
if (dir && f + radio->spacing <= radio->rangehigh)
r = wl1273_fm_set_rx_freq(radio, f + radio->spacing);
else if (dir && wrap_around)
r = wl1273_fm_set_rx_freq(radio, radio->rangelow);
else if (f - radio->spacing >= radio->rangelow)
r = wl1273_fm_set_rx_freq(radio, f - radio->spacing);
else if (wrap_around)
r = wl1273_fm_set_rx_freq(radio, radio->rangehigh);
if (r)
goto out;
if (level < SCHAR_MIN || level > SCHAR_MAX)
return -EINVAL;
reinit_completion(&radio->busy);
dev_dbg(radio->dev, "%s: BUSY\n", __func__);
r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
if (r)
goto out;
dev_dbg(radio->dev, "%s\n", __func__);
r = core->write(core, WL1273_SEARCH_LVL_SET, level);
if (r)
goto out;
r = core->write(core, WL1273_SEARCH_DIR_SET, dir);
if (r)
goto out;
r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
if (r)
goto out;
/* wait for the FR IRQ */
wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
if (!(radio->irq_received & WL1273_BL_EVENT)) {
r = -ETIMEDOUT;
goto out;
}
radio->irq_received &= ~WL1273_BL_EVENT;
if (!wrap_around)
goto out;
/* Wrap around */
dev_dbg(radio->dev, "Wrap around in HW seek.\n");
if (seek_upward)
f = radio->rangelow;
else
f = radio->rangehigh;
r = wl1273_fm_set_rx_freq(radio, f);
if (r)
goto out;
reinit_completion(&radio->busy);
dev_dbg(radio->dev, "%s: BUSY\n", __func__);
r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
if (r)
goto out;
/* wait for the FR IRQ */
if (!wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)))
r = -ETIMEDOUT;
out:
dev_dbg(radio->dev, "%s: Err: %d\n", __func__, r);
return r;
}
/**
* wl1273_fm_get_tx_ctune() - Get the TX tuning capacitor value.
* @radio: A pointer to the device struct.
*/
static unsigned int wl1273_fm_get_tx_ctune(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
struct device *dev = radio->dev;
u16 val;
int r;
if (core->mode == WL1273_MODE_OFF ||
core->mode == WL1273_MODE_SUSPENDED)
return -EPERM;
r = core->read(core, WL1273_READ_FMANT_TUNE_VALUE, &val);
if (r) {
dev_err(dev, "%s: read error: %d\n", __func__, r);
goto out;
}
out:
return val;
}
/**
* wl1273_fm_set_preemphasis() - Set the TX pre-emphasis value.
* @radio: A pointer to the device struct.
* @preemphasis: The new pre-amphasis value.
*
* Possible pre-emphasis values are: V4L2_PREEMPHASIS_DISABLED,
* V4L2_PREEMPHASIS_50_uS and V4L2_PREEMPHASIS_75_uS.
*/
static int wl1273_fm_set_preemphasis(struct wl1273_device *radio,
unsigned int preemphasis)
{
struct wl1273_core *core = radio->core;
int r;
u16 em;
if (core->mode == WL1273_MODE_OFF ||
core->mode == WL1273_MODE_SUSPENDED)
return -EPERM;
mutex_lock(&core->lock);
switch (preemphasis) {
case V4L2_PREEMPHASIS_DISABLED:
em = 1;
break;
case V4L2_PREEMPHASIS_50_uS:
em = 0;
break;
case V4L2_PREEMPHASIS_75_uS:
em = 2;
break;
default:
r = -EINVAL;
goto out;
}
r = core->write(core, WL1273_PREMPH_SET, em);
if (r)
goto out;
radio->preemphasis = preemphasis;
out:
mutex_unlock(&core->lock);
return r;
}
static int wl1273_fm_rds_on(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
int r;
dev_dbg(radio->dev, "%s\n", __func__);
if (radio->rds_on)
return 0;
r = core->write(core, WL1273_POWER_SET,
WL1273_POWER_SET_FM | WL1273_POWER_SET_RDS);
if (r)
goto out;
r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
if (r)
dev_err(radio->dev, "set freq fails: %d.\n", r);
out:
return r;
}
static int wl1273_fm_rds_off(struct wl1273_device *radio)
{
struct wl1273_core *core = radio->core;
int r;
if (!radio->rds_on)
return 0;
radio->irq_flags &= ~WL1273_RDS_EVENT;
r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
if (r)
goto out;
/* Service pending read */
wake_up_interruptible(&radio->read_queue);
dev_dbg(radio->dev, "%s\n", __func__);
r = core->write(core, WL1273_POWER_SET, WL1273_POWER_SET_FM);
if (r)
goto out;
r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
if (r)
dev_err(radio->dev, "set freq fails: %d.\n", r);
out:
dev_dbg(radio->dev, "%s: exiting...\n", __func__);
return r;
}
static int wl1273_fm_set_rds(struct wl1273_device *radio, unsigned int new_mode)
{
int r = 0;
struct wl1273_core *core = radio->core;
if (core->mode == WL1273_MODE_OFF ||
core->mode == WL1273_MODE_SUSPENDED)
return -EPERM;
if (new_mode == WL1273_RDS_RESET) {
r = core->write(core, WL1273_RDS_CNTRL_SET, 1);
return r;
}
if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_OFF) {
r = core->write(core, WL1273_RDS_DATA_ENB, 0);
} else if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_ON) {
r = core->write(core, WL1273_RDS_DATA_ENB, 1);
} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_OFF) {
r = wl1273_fm_rds_off(radio);
} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_ON) {
r = wl1273_fm_rds_on(radio);
} else {
dev_err(radio->dev, "%s: Unknown mode: %d\n",
__func__, new_mode);
r = -EINVAL;
}
if (!r)
radio->rds_on = (new_mode == WL1273_RDS_ON) ? true : false;
return r;
}
static ssize_t wl1273_fm_fops_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
u16 val;
int r;
dev_dbg(radio->dev, "%s\n", __func__);
if (core->mode != WL1273_MODE_TX)
return count;
if (radio->rds_users == 0) {
dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
return 0;
}
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
/*
* Multiple processes can open the device, but only
* one gets to write to it.
*/
if (radio->owner && radio->owner != file) {
r = -EBUSY;
goto out;
}
radio->owner = file;
/* Manual Mode */
if (count > 255)
val = 255;
else
val = count;
core->write(core, WL1273_RDS_CONFIG_DATA_SET, val);
if (copy_from_user(radio->write_buf + 1, buf, val)) {
r = -EFAULT;
goto out;
}
dev_dbg(radio->dev, "Count: %d\n", val);
dev_dbg(radio->dev, "From user: \"%s\"\n", radio->write_buf);
radio->write_buf[0] = WL1273_RDS_DATA_SET;
core->write_data(core, radio->write_buf, val + 1);
r = val;
out:
mutex_unlock(&core->lock);
return r;
}
static __poll_t wl1273_fm_fops_poll(struct file *file,
struct poll_table_struct *pts)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
if (radio->owner && radio->owner != file)
return EPOLLERR;
radio->owner = file;
if (core->mode == WL1273_MODE_RX) {
poll_wait(file, &radio->read_queue, pts);
if (radio->rd_index != radio->wr_index)
return EPOLLIN | EPOLLRDNORM;
} else if (core->mode == WL1273_MODE_TX) {
return EPOLLOUT | EPOLLWRNORM;
}
return 0;
}
static int wl1273_fm_fops_open(struct file *file)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r = 0;
dev_dbg(radio->dev, "%s\n", __func__);
if (core->mode == WL1273_MODE_RX && radio->rds_on &&
!radio->rds_users) {
dev_dbg(radio->dev, "%s: Mode: %d\n", __func__, core->mode);
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
radio->irq_flags |= WL1273_RDS_EVENT;
r = core->write(core, WL1273_INT_MASK_SET,
radio->irq_flags);
if (r) {
mutex_unlock(&core->lock);
goto out;
}
radio->rds_users++;
mutex_unlock(&core->lock);
}
out:
return r;
}
static int wl1273_fm_fops_release(struct file *file)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r = 0;
dev_dbg(radio->dev, "%s\n", __func__);
if (radio->rds_users > 0) {
radio->rds_users--;
if (radio->rds_users == 0) {
mutex_lock(&core->lock);
radio->irq_flags &= ~WL1273_RDS_EVENT;
if (core->mode == WL1273_MODE_RX) {
r = core->write(core,
WL1273_INT_MASK_SET,
radio->irq_flags);
if (r) {
mutex_unlock(&core->lock);
goto out;
}
}
mutex_unlock(&core->lock);
}
}
if (file == radio->owner)
radio->owner = NULL;
out:
return r;
}
static ssize_t wl1273_fm_fops_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
int r = 0;
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
unsigned int block_count = 0;
u16 val;
dev_dbg(radio->dev, "%s\n", __func__);
if (core->mode != WL1273_MODE_RX)
return 0;
if (radio->rds_users == 0) {
dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
return 0;
}
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
/*
* Multiple processes can open the device, but only
* one at a time gets read access.
*/
if (radio->owner && radio->owner != file) {
r = -EBUSY;
goto out;
}
radio->owner = file;
r = core->read(core, WL1273_RDS_SYNC_GET, &val);
if (r) {
dev_err(radio->dev, "%s: Get RDS_SYNC fails.\n", __func__);
goto out;
} else if (val == 0) {
dev_info(radio->dev, "RDS_SYNC: Not synchronized\n");
r = -ENODATA;
goto out;
}
/* block if no new data available */
while (radio->wr_index == radio->rd_index) {
if (file->f_flags & O_NONBLOCK) {
r = -EWOULDBLOCK;
goto out;
}
dev_dbg(radio->dev, "%s: Wait for RDS data.\n", __func__);
if (wait_event_interruptible(radio->read_queue,
radio->wr_index !=
radio->rd_index) < 0) {
r = -EINTR;
goto out;
}
}
/* calculate block count from byte count */
count /= RDS_BLOCK_SIZE;
/* copy RDS blocks from the internal buffer and to user buffer */
while (block_count < count) {
if (radio->rd_index == radio->wr_index)
break;
/* always transfer complete RDS blocks */
if (copy_to_user(buf, &radio->buffer[radio->rd_index],
RDS_BLOCK_SIZE))
break;
/* increment and wrap the read pointer */
radio->rd_index += RDS_BLOCK_SIZE;
if (radio->rd_index >= radio->buf_size)
radio->rd_index = 0;
/* increment counters */
block_count++;
buf += RDS_BLOCK_SIZE;
r += RDS_BLOCK_SIZE;
}
out:
dev_dbg(radio->dev, "%s: exit\n", __func__);
mutex_unlock(&core->lock);
return r;
}
static const struct v4l2_file_operations wl1273_fops = {
.owner = THIS_MODULE,
.read = wl1273_fm_fops_read,
.write = wl1273_fm_fops_write,
.poll = wl1273_fm_fops_poll,
.unlocked_ioctl = video_ioctl2,
.open = wl1273_fm_fops_open,
.release = wl1273_fm_fops_release,
};
static int wl1273_fm_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *capability)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
dev_dbg(radio->dev, "%s\n", __func__);
strscpy(capability->driver, WL1273_FM_DRIVER_NAME,
sizeof(capability->driver));
strscpy(capability->card, "TI Wl1273 FM Radio",
sizeof(capability->card));
strscpy(capability->bus_info, radio->bus_type,
sizeof(capability->bus_info));
return 0;
}
static int wl1273_fm_vidioc_g_input(struct file *file, void *priv,
unsigned int *i)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
dev_dbg(radio->dev, "%s\n", __func__);
*i = 0;
return 0;
}
static int wl1273_fm_vidioc_s_input(struct file *file, void *priv,
unsigned int i)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
dev_dbg(radio->dev, "%s\n", __func__);
if (i != 0)
return -EINVAL;
return 0;
}
/**
* wl1273_fm_set_tx_power() - Set the transmission power value.
* @radio: A pointer to the device struct.
* @power: The new power value.
*/
static int wl1273_fm_set_tx_power(struct wl1273_device *radio, u16 power)
{
struct wl1273_core *core = radio->core;
int r;
if (core->mode == WL1273_MODE_OFF ||
core->mode == WL1273_MODE_SUSPENDED)
return -EPERM;
mutex_lock(&core->lock);
/* Convert the dBuV value to chip presentation */
r = core->write(core, WL1273_POWER_LEV_SET, 122 - power);
if (r)
goto out;
radio->tx_power = power;
out:
mutex_unlock(&core->lock);
return r;
}
#define WL1273_SPACING_50kHz 1
#define WL1273_SPACING_100kHz 2
#define WL1273_SPACING_200kHz 4
static int wl1273_fm_tx_set_spacing(struct wl1273_device *radio,
unsigned int spacing)
{
struct wl1273_core *core = radio->core;
int r;
if (spacing == 0) {
r = core->write(core, WL1273_SCAN_SPACING_SET,
WL1273_SPACING_100kHz);
radio->spacing = 100;
} else if (spacing - 50000 < 25000) {
r = core->write(core, WL1273_SCAN_SPACING_SET,
WL1273_SPACING_50kHz);
radio->spacing = 50;
} else if (spacing - 100000 < 50000) {
r = core->write(core, WL1273_SCAN_SPACING_SET,
WL1273_SPACING_100kHz);
radio->spacing = 100;
} else {
r = core->write(core, WL1273_SCAN_SPACING_SET,
WL1273_SPACING_200kHz);
radio->spacing = 200;
}
return r;
}
static int wl1273_fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct wl1273_device *radio = ctrl->priv;
struct wl1273_core *core = radio->core;
dev_dbg(radio->dev, "%s\n", __func__);
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
switch (ctrl->id) {
case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
ctrl->val = wl1273_fm_get_tx_ctune(radio);
break;
default:
dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
__func__, ctrl->id);
break;
}
mutex_unlock(&core->lock);
return 0;
}
#define WL1273_MUTE_SOFT_ENABLE (1 << 0)
#define WL1273_MUTE_AC (1 << 1)
#define WL1273_MUTE_HARD_LEFT (1 << 2)
#define WL1273_MUTE_HARD_RIGHT (1 << 3)
#define WL1273_MUTE_SOFT_FORCE (1 << 4)
static inline struct wl1273_device *to_radio(struct v4l2_ctrl *ctrl)
{
return container_of(ctrl->handler, struct wl1273_device, ctrl_handler);
}
static int wl1273_fm_vidioc_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct wl1273_device *radio = to_radio(ctrl);
struct wl1273_core *core = radio->core;
int r = 0;
dev_dbg(radio->dev, "%s\n", __func__);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
if (core->mode == WL1273_MODE_RX && ctrl->val)
r = core->write(core,
WL1273_MUTE_STATUS_SET,
WL1273_MUTE_HARD_LEFT |
WL1273_MUTE_HARD_RIGHT);
else if (core->mode == WL1273_MODE_RX)
r = core->write(core,
WL1273_MUTE_STATUS_SET, 0x0);
else if (core->mode == WL1273_MODE_TX && ctrl->val)
r = core->write(core, WL1273_MUTE, 1);
else if (core->mode == WL1273_MODE_TX)
r = core->write(core, WL1273_MUTE, 0);
mutex_unlock(&core->lock);
break;
case V4L2_CID_AUDIO_VOLUME:
if (ctrl->val == 0)
r = wl1273_fm_set_mode(radio, WL1273_MODE_OFF);
else
r = core->set_volume(core, core->volume);
break;
case V4L2_CID_TUNE_PREEMPHASIS:
r = wl1273_fm_set_preemphasis(radio, ctrl->val);
break;
case V4L2_CID_TUNE_POWER_LEVEL:
r = wl1273_fm_set_tx_power(radio, ctrl->val);
break;
default:
dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
__func__, ctrl->id);
break;
}
dev_dbg(radio->dev, "%s\n", __func__);
return r;
}
static int wl1273_fm_vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *audio)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
dev_dbg(radio->dev, "%s\n", __func__);
if (audio->index > 1)
return -EINVAL;
strscpy(audio->name, "Radio", sizeof(audio->name));
audio->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int wl1273_fm_vidioc_s_audio(struct file *file, void *priv,
const struct v4l2_audio *audio)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
dev_dbg(radio->dev, "%s\n", __func__);
if (audio->index != 0)
return -EINVAL;
return 0;
}
#define WL1273_RDS_NOT_SYNCHRONIZED 0
#define WL1273_RDS_SYNCHRONIZED 1
static int wl1273_fm_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
u16 val;
int r;
dev_dbg(radio->dev, "%s\n", __func__);
if (tuner->index > 0)
return -EINVAL;
strscpy(tuner->name, WL1273_FM_DRIVER_NAME, sizeof(tuner->name));
tuner->type = V4L2_TUNER_RADIO;
tuner->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
tuner->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO |
V4L2_TUNER_CAP_HWSEEK_BOUNDED | V4L2_TUNER_CAP_HWSEEK_WRAP;
if (radio->stereo)
tuner->audmode = V4L2_TUNER_MODE_STEREO;
else
tuner->audmode = V4L2_TUNER_MODE_MONO;
if (core->mode != WL1273_MODE_RX)
return 0;
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
r = core->read(core, WL1273_STEREO_GET, &val);
if (r)
goto out;
if (val == 1)
tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
else
tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
r = core->read(core, WL1273_RSSI_LVL_GET, &val);
if (r)
goto out;
tuner->signal = (s16) val;
dev_dbg(radio->dev, "Signal: %d\n", tuner->signal);
tuner->afc = 0;
r = core->read(core, WL1273_RDS_SYNC_GET, &val);
if (r)
goto out;
if (val == WL1273_RDS_SYNCHRONIZED)
tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
out:
mutex_unlock(&core->lock);
return r;
}
static int wl1273_fm_vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *tuner)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r = 0;
dev_dbg(radio->dev, "%s\n", __func__);
dev_dbg(radio->dev, "tuner->index: %d\n", tuner->index);
dev_dbg(radio->dev, "tuner->name: %s\n", tuner->name);
dev_dbg(radio->dev, "tuner->capability: 0x%04x\n", tuner->capability);
dev_dbg(radio->dev, "tuner->rxsubchans: 0x%04x\n", tuner->rxsubchans);
dev_dbg(radio->dev, "tuner->rangelow: %d\n", tuner->rangelow);
dev_dbg(radio->dev, "tuner->rangehigh: %d\n", tuner->rangehigh);
if (tuner->index > 0)
return -EINVAL;
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
if (r)
goto out;
if (tuner->rxsubchans & V4L2_TUNER_SUB_RDS)
r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
else
r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
if (r)
dev_warn(radio->dev, "%s: RDS fails: %d\n", __func__, r);
if (tuner->audmode == V4L2_TUNER_MODE_MONO) {
r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
if (r < 0) {
dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
__func__, r);
goto out;
}
radio->stereo = false;
} else if (tuner->audmode == V4L2_TUNER_MODE_STEREO) {
r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
if (r < 0) {
dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
__func__, r);
goto out;
}
radio->stereo = true;
} else {
dev_err(radio->dev, "%s: tuner->audmode: %d\n",
__func__, tuner->audmode);
r = -EINVAL;
goto out;
}
out:
mutex_unlock(&core->lock);
return r;
}
static int wl1273_fm_vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *freq)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
dev_dbg(radio->dev, "%s\n", __func__);
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
freq->type = V4L2_TUNER_RADIO;
freq->frequency = WL1273_FREQ(wl1273_fm_get_freq(radio));
mutex_unlock(&core->lock);
return 0;
}
static int wl1273_fm_vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *freq)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r;
dev_dbg(radio->dev, "%s: %d\n", __func__, freq->frequency);
if (freq->type != V4L2_TUNER_RADIO) {
dev_dbg(radio->dev,
"freq->type != V4L2_TUNER_RADIO: %d\n", freq->type);
return -EINVAL;
}
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
if (core->mode == WL1273_MODE_RX) {
dev_dbg(radio->dev, "freq: %d\n", freq->frequency);
r = wl1273_fm_set_rx_freq(radio,
WL1273_INV_FREQ(freq->frequency));
if (r)
dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
": set frequency failed with %d\n", r);
} else {
r = wl1273_fm_set_tx_freq(radio,
WL1273_INV_FREQ(freq->frequency));
if (r)
dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
": set frequency failed with %d\n", r);
}
mutex_unlock(&core->lock);
dev_dbg(radio->dev, "wl1273_vidioc_s_frequency: DONE\n");
return r;
}
#define WL1273_DEFAULT_SEEK_LEVEL 7
static int wl1273_fm_vidioc_s_hw_freq_seek(struct file *file, void *priv,
const struct v4l2_hw_freq_seek *seek)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r;
dev_dbg(radio->dev, "%s\n", __func__);
if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO)
return -EINVAL;
if (file->f_flags & O_NONBLOCK)
return -EWOULDBLOCK;
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
if (r)
goto out;
r = wl1273_fm_tx_set_spacing(radio, seek->spacing);
if (r)
dev_warn(radio->dev, "HW seek failed: %d\n", r);
r = wl1273_fm_set_seek(radio, seek->wrap_around, seek->seek_upward,
WL1273_DEFAULT_SEEK_LEVEL);
if (r)
dev_warn(radio->dev, "HW seek failed: %d\n", r);
out:
mutex_unlock(&core->lock);
return r;
}
static int wl1273_fm_vidioc_s_modulator(struct file *file, void *priv,
const struct v4l2_modulator *modulator)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
int r = 0;
dev_dbg(radio->dev, "%s\n", __func__);
if (modulator->index > 0)
return -EINVAL;
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
r = wl1273_fm_set_mode(radio, WL1273_MODE_TX);
if (r)
goto out;
if (modulator->txsubchans & V4L2_TUNER_SUB_RDS)
r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
else
r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
if (modulator->txsubchans & V4L2_TUNER_SUB_MONO)
r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
else
r = core->write(core, WL1273_MONO_SET,
WL1273_RX_STEREO);
if (r < 0)
dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
"MONO_SET fails: %d\n", r);
out:
mutex_unlock(&core->lock);
return r;
}
static int wl1273_fm_vidioc_g_modulator(struct file *file, void *priv,
struct v4l2_modulator *modulator)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
u16 val;
int r;
dev_dbg(radio->dev, "%s\n", __func__);
strscpy(modulator->name, WL1273_FM_DRIVER_NAME,
sizeof(modulator->name));
modulator->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
modulator->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
modulator->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO;
if (core->mode != WL1273_MODE_TX)
return 0;
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
r = core->read(core, WL1273_MONO_SET, &val);
if (r)
goto out;
if (val == WL1273_TX_STEREO)
modulator->txsubchans = V4L2_TUNER_SUB_STEREO;
else
modulator->txsubchans = V4L2_TUNER_SUB_MONO;
if (radio->rds_on)
modulator->txsubchans |= V4L2_TUNER_SUB_RDS;
out:
mutex_unlock(&core->lock);
return 0;
}
static int wl1273_fm_vidioc_log_status(struct file *file, void *priv)
{
struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
struct wl1273_core *core = radio->core;
struct device *dev = radio->dev;
u16 val;
int r;
dev_info(dev, DRIVER_DESC);
if (core->mode == WL1273_MODE_OFF) {
dev_info(dev, "Mode: Off\n");
return 0;
}
if (core->mode == WL1273_MODE_SUSPENDED) {
dev_info(dev, "Mode: Suspended\n");
return 0;
}
r = core->read(core, WL1273_ASIC_ID_GET, &val);
if (r)
dev_err(dev, "%s: Get ASIC_ID fails.\n", __func__);
else
dev_info(dev, "ASIC_ID: 0x%04x\n", val);
r = core->read(core, WL1273_ASIC_VER_GET, &val);
if (r)
dev_err(dev, "%s: Get ASIC_VER fails.\n", __func__);
else
dev_info(dev, "ASIC Version: 0x%04x\n", val);
r = core->read(core, WL1273_FIRM_VER_GET, &val);
if (r)
dev_err(dev, "%s: Get FIRM_VER fails.\n", __func__);
else
dev_info(dev, "FW version: %d(0x%04x)\n", val, val);
r = core->read(core, WL1273_BAND_SET, &val);
if (r)
dev_err(dev, "%s: Get BAND fails.\n", __func__);
else
dev_info(dev, "BAND: %d\n", val);
if (core->mode == WL1273_MODE_TX) {
r = core->read(core, WL1273_PUPD_SET, &val);
if (r)
dev_err(dev, "%s: Get PUPD fails.\n", __func__);
else
dev_info(dev, "PUPD: 0x%04x\n", val);
r = core->read(core, WL1273_CHANL_SET, &val);
if (r)
dev_err(dev, "%s: Get CHANL fails.\n", __func__);
else
dev_info(dev, "Tx frequency: %dkHz\n", val*10);
} else if (core->mode == WL1273_MODE_RX) {
int bf = radio->rangelow;
r = core->read(core, WL1273_FREQ_SET, &val);
if (r)
dev_err(dev, "%s: Get FREQ fails.\n", __func__);
else
dev_info(dev, "RX Frequency: %dkHz\n", bf + val*50);
r = core->read(core, WL1273_MOST_MODE_SET, &val);
if (r)
dev_err(dev, "%s: Get MOST_MODE fails.\n",
__func__);
else if (val == 0)
dev_info(dev, "MOST_MODE: Stereo according to blend\n");
else if (val == 1)
dev_info(dev, "MOST_MODE: Force mono output\n");
else
dev_info(dev, "MOST_MODE: Unexpected value: %d\n", val);
r = core->read(core, WL1273_MOST_BLEND_SET, &val);
if (r)
dev_err(dev, "%s: Get MOST_BLEND fails.\n", __func__);
else if (val == 0)
dev_info(dev,
"MOST_BLEND: Switched blend & hysteresis.\n");
else if (val == 1)
dev_info(dev, "MOST_BLEND: Soft blend.\n");
else
dev_info(dev, "MOST_BLEND: Unexpected val: %d\n", val);
r = core->read(core, WL1273_STEREO_GET, &val);
if (r)
dev_err(dev, "%s: Get STEREO fails.\n", __func__);
else if (val == 0)
dev_info(dev, "STEREO: Not detected\n");
else if (val == 1)
dev_info(dev, "STEREO: Detected\n");
else
dev_info(dev, "STEREO: Unexpected value: %d\n", val);
r = core->read(core, WL1273_RSSI_LVL_GET, &val);
if (r)
dev_err(dev, "%s: Get RSSI_LVL fails.\n", __func__);
else
dev_info(dev, "RX signal strength: %d\n", (s16) val);
r = core->read(core, WL1273_POWER_SET, &val);
if (r)
dev_err(dev, "%s: Get POWER fails.\n", __func__);
else
dev_info(dev, "POWER: 0x%04x\n", val);
r = core->read(core, WL1273_INT_MASK_SET, &val);
if (r)
dev_err(dev, "%s: Get INT_MASK fails.\n", __func__);
else
dev_info(dev, "INT_MASK: 0x%04x\n", val);
r = core->read(core, WL1273_RDS_SYNC_GET, &val);
if (r)
dev_err(dev, "%s: Get RDS_SYNC fails.\n",
__func__);
else if (val == 0)
dev_info(dev, "RDS_SYNC: Not synchronized\n");
else if (val == 1)
dev_info(dev, "RDS_SYNC: Synchronized\n");
else
dev_info(dev, "RDS_SYNC: Unexpected value: %d\n", val);
r = core->read(core, WL1273_I2S_MODE_CONFIG_SET, &val);
if (r)
dev_err(dev, "%s: Get I2S_MODE_CONFIG fails.\n",
__func__);
else
dev_info(dev, "I2S_MODE_CONFIG: 0x%04x\n", val);
r = core->read(core, WL1273_VOLUME_SET, &val);
if (r)
dev_err(dev, "%s: Get VOLUME fails.\n", __func__);
else
dev_info(dev, "VOLUME: 0x%04x\n", val);
}
return 0;
}
static void wl1273_vdev_release(struct video_device *dev)
{
}
static const struct v4l2_ctrl_ops wl1273_ctrl_ops = {
.s_ctrl = wl1273_fm_vidioc_s_ctrl,
.g_volatile_ctrl = wl1273_fm_g_volatile_ctrl,
};
static const struct v4l2_ioctl_ops wl1273_ioctl_ops = {
.vidioc_querycap = wl1273_fm_vidioc_querycap,
.vidioc_g_input = wl1273_fm_vidioc_g_input,
.vidioc_s_input = wl1273_fm_vidioc_s_input,
.vidioc_g_audio = wl1273_fm_vidioc_g_audio,
.vidioc_s_audio = wl1273_fm_vidioc_s_audio,
.vidioc_g_tuner = wl1273_fm_vidioc_g_tuner,
.vidioc_s_tuner = wl1273_fm_vidioc_s_tuner,
.vidioc_g_frequency = wl1273_fm_vidioc_g_frequency,
.vidioc_s_frequency = wl1273_fm_vidioc_s_frequency,
.vidioc_s_hw_freq_seek = wl1273_fm_vidioc_s_hw_freq_seek,
.vidioc_g_modulator = wl1273_fm_vidioc_g_modulator,
.vidioc_s_modulator = wl1273_fm_vidioc_s_modulator,
.vidioc_log_status = wl1273_fm_vidioc_log_status,
};
static const struct video_device wl1273_viddev_template = {
.fops = &wl1273_fops,
.ioctl_ops = &wl1273_ioctl_ops,
.name = WL1273_FM_DRIVER_NAME,
.release = wl1273_vdev_release,
.vfl_dir = VFL_DIR_TX,
.device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER |
V4L2_CAP_RADIO | V4L2_CAP_AUDIO |
V4L2_CAP_RDS_CAPTURE | V4L2_CAP_MODULATOR |
V4L2_CAP_RDS_OUTPUT,
};
static int wl1273_fm_radio_remove(struct platform_device *pdev)
{
struct wl1273_device *radio = platform_get_drvdata(pdev);
struct wl1273_core *core = radio->core;
dev_info(&pdev->dev, "%s.\n", __func__);
free_irq(core->client->irq, radio);
core->pdata->free_resources();
v4l2_ctrl_handler_free(&radio->ctrl_handler);
video_unregister_device(&radio->videodev);
v4l2_device_unregister(&radio->v4l2dev);
return 0;
}
static int wl1273_fm_radio_probe(struct platform_device *pdev)
{
struct wl1273_core **core = pdev->dev.platform_data;
struct wl1273_device *radio;
struct v4l2_ctrl *ctrl;
int r = 0;
pr_debug("%s\n", __func__);
if (!core) {
dev_err(&pdev->dev, "No platform data.\n");
r = -EINVAL;
goto pdata_err;
}
radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
if (!radio) {
r = -ENOMEM;
goto pdata_err;
}
/* RDS buffer allocation */
radio->buf_size = rds_buf * RDS_BLOCK_SIZE;
radio->buffer = devm_kzalloc(&pdev->dev, radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
pr_err("Cannot allocate memory for RDS buffer.\n");
r = -ENOMEM;
goto pdata_err;
}
radio->core = *core;
radio->irq_flags = WL1273_IRQ_MASK;
radio->dev = &radio->core->client->dev;
radio->rds_on = false;
radio->core->mode = WL1273_MODE_OFF;
radio->tx_power = 118;
radio->core->audio_mode = WL1273_AUDIO_ANALOG;
radio->band = WL1273_BAND_OTHER;
radio->core->i2s_mode = WL1273_I2S_DEF_MODE;
radio->core->channel_number = 2;
radio->core->volume = WL1273_DEFAULT_VOLUME;
radio->rx_frequency = WL1273_BAND_OTHER_LOW;
radio->tx_frequency = WL1273_BAND_OTHER_HIGH;
radio->rangelow = WL1273_BAND_OTHER_LOW;
radio->rangehigh = WL1273_BAND_OTHER_HIGH;
radio->stereo = true;
radio->bus_type = "I2C";
if (radio->core->pdata->request_resources) {
r = radio->core->pdata->request_resources(radio->core->client);
if (r) {
dev_err(radio->dev, WL1273_FM_DRIVER_NAME
": Cannot get platform data\n");
goto pdata_err;
}
dev_dbg(radio->dev, "irq: %d\n", radio->core->client->irq);
r = request_threaded_irq(radio->core->client->irq, NULL,
wl1273_fm_irq_thread_handler,
IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
"wl1273-fm", radio);
if (r < 0) {
dev_err(radio->dev, WL1273_FM_DRIVER_NAME
": Unable to register IRQ handler: %d\n", r);
goto err_request_irq;
}
} else {
dev_err(radio->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ not configured");
r = -EINVAL;
goto pdata_err;
}
init_completion(&radio->busy);
init_waitqueue_head(&radio->read_queue);
radio->write_buf = devm_kzalloc(&pdev->dev, 256, GFP_KERNEL);
if (!radio->write_buf) {
r = -ENOMEM;
goto write_buf_err;
}
radio->dev = &pdev->dev;
radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
radio->rds_users = 0;
r = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
if (r) {
dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
goto write_buf_err;
}
/* V4L2 configuration */
radio->videodev = wl1273_viddev_template;
radio->videodev.v4l2_dev = &radio->v4l2dev;
v4l2_ctrl_handler_init(&radio->ctrl_handler, 6);
/* add in ascending ID order */
v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, 0, WL1273_MAX_VOLUME, 1,
WL1273_DEFAULT_VOLUME);
v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
v4l2_ctrl_new_std_menu(&radio->ctrl_handler, &wl1273_ctrl_ops,
V4L2_CID_TUNE_PREEMPHASIS,
V4L2_PREEMPHASIS_75_uS, 0x03,
V4L2_PREEMPHASIS_50_uS);
v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
V4L2_CID_TUNE_POWER_LEVEL, 91, 122, 1, 118);
ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
V4L2_CID_TUNE_ANTENNA_CAPACITOR,
0, 255, 1, 255);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
if (radio->ctrl_handler.error) {
r = radio->ctrl_handler.error;
dev_err(&pdev->dev, "Ctrl handler error: %d\n", r);
goto handler_init_err;
}
video_set_drvdata(&radio->videodev, radio);
platform_set_drvdata(pdev, radio);
/* register video device */
r = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
if (r) {
dev_err(&pdev->dev, WL1273_FM_DRIVER_NAME
": Could not register video device\n");
goto handler_init_err;
}
return 0;
handler_init_err:
v4l2_ctrl_handler_free(&radio->ctrl_handler);
v4l2_device_unregister(&radio->v4l2dev);
write_buf_err:
free_irq(radio->core->client->irq, radio);
err_request_irq:
radio->core->pdata->free_resources();
pdata_err:
return r;
}
static struct platform_driver wl1273_fm_radio_driver = {
.probe = wl1273_fm_radio_probe,
.remove = wl1273_fm_radio_remove,
.driver = {
.name = "wl1273_fm_radio",
},
};
module_platform_driver(wl1273_fm_radio_driver);
MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wl1273_fm_radio");