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linux/drivers/media/radio/radio-wl1273.c
Hans Verkuil ddac5c1079 [media] v4l2-ctrls: fix and improve volatile control handling 
If you have a cluster of controls that is a mix of volatile and non-volatile
controls, then requesting the value of the volatile control would fail if the
master control of that cluster was non-volatile. The code assumed that the
volatile state of the master control was the same for all other controls in
the cluster.

This is now fixed.

In addition, it was clear from bugs in some drivers that it was confusing that
the ctrl->cur union had to be used in g_volatile_ctrl. Several drivers used the
'new' values instead. The framework was changed so that drivers now set the new
value instead of the current value.

This has an additional benefit as well: the volatile values are now only stored
in the 'new' value, leaving the current value alone. This is useful for
autofoo/foo control clusters where you want to have a 'foo' control act like a
volatile control if 'autofoo' is on, but as a normal control when it is off.

Since with this change the cur value is no longer overwritten when g_volatile_ctrl
is called, you can use it to remember the original 'foo' value. For example:

autofoo = 0, foo = 10 and foo is non-volatile.

Now autofoo is set to 1 and foo is marked volatile. Retrieving the foo value
will get the volatile value. Set autofoo back to 0, which marks foo as non-
volatile again, and retrieving foo will get the old current value of 10.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-27 17:53:17 -03:00

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/*
* Driver for the Texas Instruments WL1273 FM radio.
*
* Copyright (C) 2011 Nokia Corporation
* Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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/delay.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/mfd/wl1273-core.h>
#include <linux/slab.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;
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;
INIT_COMPLETION(radio->busy);
/* wait for the FR IRQ */
r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
if (!r)
return -ETIMEDOUT;
dev_dbg(radio->dev, "WL1273_CHANL_SET: %d\n", r);
/* Enable the output power */
r = core->write(core, WL1273_POWER_ENB_SET, 1);
if (r)
return r;
INIT_COMPLETION(radio->busy);
/* wait for the POWER_ENB IRQ */
r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
if (!r)
return -ETIMEDOUT;
radio->tx_frequency = freq;
dev_dbg(radio->dev, "WL1273_POWER_ENB_SET: %d\n", r);
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;
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;
}
INIT_COMPLETION(radio->busy);
r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
if (!r) {
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);
else
r = core->write(core, WL1273_RDS_DATA_ENB, 0);
} 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 = 0;
/* 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;
INIT_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_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
if (!(radio->irq_received & WL1273_BL_EVENT))
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;
INIT_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_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
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 unsigned int 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 -EBUSY;
radio->owner = file;
if (core->mode == WL1273_MODE_RX) {
poll_wait(file, &radio->read_queue, pts);
if (radio->rd_index != radio->wr_index)
return POLLIN | POLLRDNORM;
} else if (core->mode == WL1273_MODE_TX) {
return POLLOUT | POLLWRNORM;
}
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) {
if (mutex_lock_interruptible(&core->lock))
return -EINTR;
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__);
strlcpy(capability->driver, WL1273_FM_DRIVER_NAME,
sizeof(capability->driver));
strlcpy(capability->card, "Texas Instruments Wl1273 FM Radio",
sizeof(capability->card));
strlcpy(capability->bus_info, radio->bus_type,
sizeof(capability->bus_info));
capability->capabilities = 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;
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.
* @core: 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;
strlcpy(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,
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;
strlcpy(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;
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,
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,
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,
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 (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,
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__);
strlcpy(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 struct video_device wl1273_viddev_template = {
.fops = &wl1273_fops,
.ioctl_ops = &wl1273_ioctl_ops,
.name = WL1273_FM_DRIVER_NAME,
.release = wl1273_vdev_release,
};
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);
kfree(radio->buffer);
kfree(radio->write_buf);
kfree(radio);
return 0;
}
static int __devinit 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 = kzalloc(sizeof(*radio), GFP_KERNEL);
if (!radio) {
r = -ENOMEM;
goto pdata_err;
}
/* RDS buffer allocation */
radio->buf_size = rds_buf * RDS_BLOCK_SIZE;
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
pr_err("Cannot allocate memory for RDS buffer.\n");
r = -ENOMEM;
goto err_kmalloc;
}
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 err_resources;
}
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 err_resources;
}
init_completion(&radio->busy);
init_waitqueue_head(&radio->read_queue);
radio->write_buf = kmalloc(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 device_register_err;
}
/* V4L2 configuration */
memcpy(&radio->videodev, &wl1273_viddev_template,
sizeof(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->is_volatile = 1;
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);
device_register_err:
kfree(radio->write_buf);
write_buf_err:
free_irq(radio->core->client->irq, radio);
err_request_irq:
radio->core->pdata->free_resources();
err_resources:
kfree(radio->buffer);
err_kmalloc:
kfree(radio);
pdata_err:
return r;
}
MODULE_ALIAS("platform:wl1273_fm_radio");
static struct platform_driver wl1273_fm_radio_driver = {
.probe = wl1273_fm_radio_probe,
.remove = __devexit_p(wl1273_fm_radio_remove),
.driver = {
.name = "wl1273_fm_radio",
.owner = THIS_MODULE,
},
};
static int __init wl1273_fm_module_init(void)
{
pr_info("%s\n", __func__);
return platform_driver_register(&wl1273_fm_radio_driver);
}
module_init(wl1273_fm_module_init);
static void __exit wl1273_fm_module_exit(void)
{
platform_driver_unregister(&wl1273_fm_radio_driver);
pr_info(DRIVER_DESC ", Exiting.\n");
}
module_exit(wl1273_fm_module_exit);
MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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