On Monday 24 May 2010 14:21:43 Matti J. Aaltonen wrote:
> This file implements V4L2 controls for using the Texas Instruments
> WL1273 FM Radio.
>
> Signed-off-by: Matti J. Aaltonen <matti.j.aalto...@nokia.com>
> ---
> drivers/media/radio/Kconfig | 15 +
> drivers/media/radio/Makefile | 1 +
> drivers/media/radio/radio-wl1273.c | 1876
> ++++++++++++++++++++++++++++++++++++
> 3 files changed, 1892 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/radio/radio-wl1273.c
>
> diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
> index 83567b8..209fd37 100644
> --- a/drivers/media/radio/Kconfig
> +++ b/drivers/media/radio/Kconfig
> @@ -452,4 +452,19 @@ config RADIO_TIMBERDALE
> found behind the Timberdale FPGA on the Russellville board.
> Enabling this driver will automatically select the DSP and tuner.
>
> +config RADIO_WL1273
> + tristate "Texas Instruments WL1273 I2C FM Radio"
> + depends on I2C && VIDEO_V4L2 && SND
> + select FW_LOADER
> + ---help---
> + Choose Y here if you have this FM radio chip.
> +
> + In order to control your radio card, you will need to use programs
> + that are compatible with the Video For Linux 2 API. Information on
> + this API and pointers to "v4l2" programs may be found at
> + <file:Documentation/video4linux/API.html>.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called radio-wl1273.
> +
> endif # RADIO_ADAPTERS
> diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
> index f615583..d297074 100644
> --- a/drivers/media/radio/Makefile
> +++ b/drivers/media/radio/Makefile
> @@ -26,5 +26,6 @@ obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
> obj-$(CONFIG_RADIO_SAA7706H) += saa7706h.o
> obj-$(CONFIG_RADIO_TEF6862) += tef6862.o
> obj-$(CONFIG_RADIO_TIMBERDALE) += radio-timb.o
> +obj-$(CONFIG_RADIO_WL1273) += radio-wl1273.o
>
> EXTRA_CFLAGS += -Isound
> diff --git a/drivers/media/radio/radio-wl1273.c
> b/drivers/media/radio/radio-wl1273.c
> new file mode 100644
> index 0000000..f19b100
> --- /dev/null
> +++ b/drivers/media/radio/radio-wl1273.c
> @@ -0,0 +1,1876 @@
> +/*
> + * Driver for the Texas Instruments WL1273 FM radio.
> + *
> + * Copyright (C) Nokia Corporation
> + * Author: Matti J. Aaltonen <matti.j.aalto...@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
> + */
> +
> +#undef DEBUG
> +
> +#include <asm/unaligned.h>
> +#include <linux/delay.h>
> +#include <linux/firmware.h>
> +#include <linux/mfd/wl1273-core.h>
> +#include <linux/platform_device.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +
> +#define DRIVER_DESC "Wl1273 FM Radio - V4L2"
> +
> +#define WL1273_POWER_SET_OFF 0
> +#define WL1273_POWER_SET_FM (1 << 0)
> +#define WL1273_POWER_SET_RDS (1 << 1)
> +#define WL1273_POWER_SET_RETENTION (1 << 4)
> +
> +#define WL1273_PUPD_SET_OFF 0x00
> +#define WL1273_PUPD_SET_ON 0x01
> +#define WL1273_PUPD_SET_RETENTION 0x10
> +
> +#define WL1273_FREQ_MULT (10000 / 625)
> +#define WL1273_INV_FREQ_MULT (625 / 10000)
> +/*
> + * static unsigned char radio_band - Band
> + *
> + * The bands are 0=Japan, 1=USA-Europe. USA-Europe is the default.
> + */
> +static unsigned char radio_band = 1;
> +module_param(radio_band, byte, 0);
> +MODULE_PARM_DESC(radio_band, "Band: 0=Japan, 1=USA-Europe*");
> +
> +/*
> + * static int radio_nr - The number of the radio device
> + *
> + * The default is 0.
> + */
> +static int radio_nr = -1;
> +module_param(radio_nr, int, 0);
> +MODULE_PARM_DESC(radio_nr, "Radio Nr");
> +
> +struct wl1273_device {
> + struct v4l2_device v4l2dev;
> + struct video_device videodev;
> + struct device *dev;
> + struct wl1273_core *core;
> + bool rds_on;
> +};
> +
> +static int wl1273_fm_set_tx_freq(struct wl1273_core *core, unsigned int freq)
> +{
> + int r = 0;
> +
> + if (freq < core->bands[core->band].bottom_frequency) {
> + dev_err(&core->i2c_dev->dev,
> + "Frequency out of range: %d < %d\n",
> + freq, core->bands[core->band].bottom_frequency);
> + return -EDOM;
> + }
> +
> + if (freq > core->bands[core->band].top_frequency) {
> + dev_err(&core->i2c_dev->dev,
> + "Frequency out of range: %d > %d\n",
> + freq, core->bands[core->band].top_frequency);
> + return -EDOM;
> + }
I understood that the band was relevant for receiving only?
> +
> + /*
> + * The driver works better with this msleep,
> + * the documentation doesn't mention it.
> + */
> + msleep(5);
> + dev_dbg(&core->i2c_dev->dev, "%s: freq: %d kHz\n", __func__, freq);
> +
> + INIT_COMPLETION(core->busy);
> + /* Set the current tx channel */
> + r = wl1273_fm_write_cmd(core, WL1273_CHANL_SET, freq / 10);
> + if (r)
> + return r;
> +
> + /* wait for the FR IRQ */
> + r = wait_for_completion_timeout(&core->busy, msecs_to_jiffies(1000));
> + if (!r)
> + return -ETIMEDOUT;
> +
> + dev_dbg(&core->i2c_dev->dev, "WL1273_CHANL_SET: %d\n", r);
> +
> + /* Enable the output power */
> + INIT_COMPLETION(core->busy);
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_ENB_SET, 1);
> + if (r)
> + return r;
> +
> + /* wait for the POWER_ENB IRQ */
> + r = wait_for_completion_timeout(&core->busy, msecs_to_jiffies(1000));
> + if (!r)
> + return -ETIMEDOUT;
> +
> + core->tx_frequency = freq;
> + dev_dbg(&core->i2c_dev->dev, "WL1273_POWER_ENB_SET: %d\n", r);
> +
> + return 0;
> +}
> +
> +static int wl1273_fm_set_rx_freq(struct wl1273_core *core, unsigned int freq)
> +{
> + int r;
> + int f;
> +
> + if (freq < core->bands[core->band].bottom_frequency) {
> + dev_err(&core->i2c_dev->dev,
> + "Frequency out of range: %d < %d\n",
> + freq, core->bands[core->band].bottom_frequency);
> + r = -EDOM;
> + goto err;
> + }
> +
> + if (freq > core->bands[core->band].top_frequency) {
> + dev_err(&core->i2c_dev->dev,
> + "Frequency out of range: %d > %d\n",
> + freq, core->bands[core->band].top_frequency);
> + r = -EDOM;
> + goto err;
> + }
> +
> + dev_dbg(&core->i2c_dev->dev, "%s: %dkHz\n", __func__, freq);
> +
> + wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> +
> + f = (freq - core->bands[core->band].bottom_frequency) / 50;
> + r = wl1273_fm_write_cmd(core, WL1273_FREQ_SET, f);
> + if (r)
> + goto err;
> +
> + INIT_COMPLETION(core->busy);
> + r = wl1273_fm_write_cmd(core, WL1273_TUNER_MODE_SET,
> + TUNER_MODE_PRESET);
> + if (r) {
> + complete(&core->busy);
> + goto err;
> + }
> +
> + r = wait_for_completion_timeout(&core->busy, msecs_to_jiffies(2000));
> + if (!r)
> + return -ETIMEDOUT;
> +
> + core->rd_index = 0;
> + core->wr_index = 0;
> + core->rx_frequency = freq;
> + return 0;
> +
> +err:
> + return r;
> +}
> +
> +static int wl1273_fm_get_freq(struct wl1273_core *core)
> +{
> + unsigned int freq;
> + u16 f;
> + int r;
> +
> + if (core->mode == WL1273_MODE_RX) {
> + r = wl1273_fm_read_reg(core, WL1273_FREQ_SET, &f);
> + if (r)
> + return r;
> +
> + dev_dbg(&core->i2c_dev->dev, "Freq get: 0x%04x\n", f);
> + freq = core->bands[core->band].bottom_frequency + 50 * f;
> + } else {
> + r = wl1273_fm_read_reg(core, WL1273_CHANL_SET, &f);
> + if (r)
> + return r;
> +
> + freq = f * 10;
> + }
> +
> + return freq;
> +}
> +
> +/**
> + * wl1273_fm_upload_firmware_patch() - Upload the firmware.
> + * @core: 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_core *core)
> +{
> + unsigned int packet_num;
> + const struct firmware *fw_p;
> + const char *fw_name = "radio-wl1273-fw.bin";
> + struct i2c_client *client;
> + __u8 *ptr;
> + int i, n, len, r;
> + struct i2c_msg *msgs;
> +
> + client = core->i2c_dev;
> + dev_dbg(&client->dev, "%s:\n", __func__);
> +
> + if (request_firmware(&fw_p, fw_name, &client->dev)) {
> + dev_info(&client->dev, "%s - %s not found\n", __func__,
> + fw_name);
> +
> + return 0;
> + }
> +
> + ptr = (__u8 *) fw_p->data;
> + packet_num = ptr[0];
> + dev_dbg(&client->dev, "%s: packets: %d\n", __func__, packet_num);
> +
> + msgs = kmalloc((packet_num + 1)*sizeof(struct i2c_msg), GFP_KERNEL);
> + if (!msgs) {
> + r = -ENOMEM;
> + goto out;
> + }
> +
> + i = 1;
> + for (n = 0; n <= packet_num; n++) {
> + len = ptr[i];
> +
> + dev_dbg(&client->dev, "%s: len[%d]: %d\n",
> + __func__, n, len);
> +
> + if (i + len + 1 <= fw_p->size) {
> + msgs[n].addr = client->addr;
> + msgs[n].flags = 0;
> + msgs[n].len = len;
> + msgs[n].buf = ptr + i + 1;
> + } else {
> + break;
> + }
> +
> + i += len + 1;
> + }
> +
> + r = i2c_transfer(client->adapter, msgs, packet_num);
> + kfree(msgs);
> +
> + if (r != packet_num) {
> + dev_err(&client->dev, "FW upload error: %d\n", r);
> + dev_dbg(&client->dev, "%d != %d\n", packet_num, r);
> +
> + r = -EREMOTEIO;
> + goto out;
> + } else {
> + r = 0;
> + }
> +
> + /* ignore possible error here */
> + wl1273_fm_write_cmd(core, WL1273_RESET, 0);
> + dev_dbg(&client->dev, "n: %d, i: %d\n", n, i);
> +
> + if (n - 1 != packet_num)
> + dev_warn(&client->dev, "%s - incorrect firmware size.\n",
> + __func__);
> +
> + if (i != fw_p->size)
> + dev_warn(&client->dev, "%s - inconsistent firmware.\n",
> + __func__);
> +
> + dev_dbg(&client->dev, "%s - download OK, r: %d\n", __func__, r);
> +
> +out:
> + release_firmware(fw_p);
> + return r;
> +}
> +
> +static int wl1273_fm_stop(struct wl1273_core *core)
> +{
> + struct i2c_client *client = core->i2c_dev;
> + struct wl1273_fm_platform_data *pdata =
> + client->dev.platform_data;
> +
> + if (core->mode == WL1273_MODE_RX) {
> + int r = wl1273_fm_write_cmd(core, WL1273_POWER_SET,
> + WL1273_POWER_SET_OFF);
> + if (r)
> + dev_err(&core->i2c_dev->dev,
> + "%s: POWER_SET fails: %d\n", __func__, r);
> + } else if (core->mode == WL1273_MODE_TX) {
> + int r = wl1273_fm_write_cmd(core, WL1273_PUPD_SET,
> + WL1273_PUPD_SET_OFF);
> + if (r)
> + dev_err(&core->i2c_dev->dev,
> + "%s: PUPD_SET fails: %d\n", __func__, r);
> + }
> +
> + if (pdata->disable) {
> + pdata->disable();
> + dev_dbg(&core->i2c_dev->dev, "Back to reset\n");
> + }
> +
> + return 0;
> +}
> +
> +static int wl1273_fm_start(struct wl1273_core *core, int new_mode)
> +{
> + struct i2c_client *client = core->i2c_dev;
> + struct wl1273_fm_platform_data *pdata =
> + client->dev.platform_data;
> + int r = -EINVAL;
> +
> + if (pdata->enable && core->mode == WL1273_MODE_OFF) {
> + pdata->enable();
> + msleep(250);
> + }
> +
> + if (new_mode == WL1273_MODE_RX) {
> + u16 val = WL1273_POWER_SET_FM;
> +
> + if (core->rds_on)
> + val |= WL1273_POWER_SET_RDS;
> +
> + /* If this fails try again */
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_SET, val);
> + if (r) {
> + msleep(100);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_SET, val);
> + if (r) {
> + dev_err(&client->dev, "%s: POWER_SET fails.\n",
> + __func__);
> + goto fail;
> + }
> + }
> +
> + /* rds buffer configuration */
> + core->wr_index = 0;
> + core->rd_index = 0;
> +
> + } else if (new_mode == WL1273_MODE_TX) {
> + /* If this fails try again */
> + r = wl1273_fm_write_cmd(core, WL1273_PUPD_SET,
> + WL1273_PUPD_SET_ON);
> + if (r) {
> + msleep(100);
> + r = wl1273_fm_write_cmd(core, WL1273_PUPD_SET,
> + WL1273_PUPD_SET_ON);
> + if (r) {
> + dev_err(&client->dev, "%s: PUPD_SET fails.\n",
> + __func__);
> + goto fail;
> + }
> + }
> +
> + if (core->rds_on)
> + r = wl1273_fm_write_cmd(core, WL1273_RDS_DATA_ENB, 1);
> + else
> + r = wl1273_fm_write_cmd(core, WL1273_RDS_DATA_ENB, 0);
> + } else {
> + dev_warn(&client->dev, "%s: Illegal mode.\n", __func__);
> + }
> +
> + if (core->mode == WL1273_MODE_OFF) {
> + dev_dbg(&core->i2c_dev->dev, "Out of reset\n");
> +
> + r = wl1273_fm_upload_firmware_patch(core);
> + if (r)
> + dev_warn(&client->dev, "Firmware upload failed.\n");
> + }
> +
> + return 0;
> +fail:
> + if (pdata->disable)
> + pdata->disable();
> +
> + dev_dbg(&client->dev, "%s: return: %d\n", __func__, r);
> + return r;
> +}
> +
> +static int wl1273_fm_suspend(struct wl1273_core *core)
> +{
> + int r = 0;
> + struct i2c_client *client = core->i2c_dev;
> +
> + /* Cannot go from OFF to SUSPENDED */
> + if (core->mode == WL1273_MODE_RX)
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_SET,
> + WL1273_POWER_SET_RETENTION);
> + else if (core->mode == WL1273_MODE_TX)
> + r = wl1273_fm_write_cmd(core, WL1273_PUPD_SET,
> + WL1273_PUPD_SET_RETENTION);
> + else
> + r = -EINVAL;
> +
> + if (r) {
> + dev_err(&client->dev, "%s: POWER_SET fails: %d\n", __func__, r);
> + goto out;
> + }
> +
> +out:
> + return r;
> +}
> +
> +static int wl1273_fm_set_mode(struct wl1273_core *core, int mode)
> +{
> + int r;
> + int old_mode;
> +
> + dev_dbg(&core->i2c_dev->dev, "%s\n", __func__);
> + dev_dbg(&core->i2c_dev->dev, "Allowed modes: %d\n",
> + core->allowed_modes);
> +
> + mutex_lock(&core->lock);
> + old_mode = core->mode;
> +
> + switch (mode) {
> + case WL1273_MODE_RX:
> + case WL1273_MODE_TX:
> + if (mode == WL1273_MODE_RX &&
> + !(core->allowed_modes & WL1273_RX_ALLOWED)) {
> + r = -EPERM;
> + goto out;
> + } else if (mode == WL1273_MODE_TX &&
> + !(core->allowed_modes & WL1273_TX_ALLOWED)) {
> + r = -EPERM;
> + goto out;
> + }
> +
> + r = wl1273_fm_start(core, mode);
> + if (r) {
> + dev_err(&core->i2c_dev->dev, "%s: Cannot start.\n",
> + __func__);
> + wl1273_fm_stop(core);
> + goto out;
> + } else {
> + core->mode = mode;
> + r = wl1273_fm_set_audio(core, core->audio_mode);
> + if (r)
> + dev_err(&core->i2c_dev->dev,
> + "Cannot set audio mode.\n");
> + }
> +
> + r = wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> + if (r) {
> + dev_err(&core->i2c_dev->dev,
> + "INT_MASK_SET fails.\n");
> + goto out;
> + }
> +
> + /* remember previous settings */
> + if (mode == WL1273_MODE_RX) {
> + r = wl1273_fm_set_rx_freq(core, core->rx_frequency);
> + if (r) {
> + dev_err(&core->i2c_dev->dev,
> + "set freq fails: %d.\n", r);
> + goto out;
> + }
> +
> + r = wl1273_fm_set_volume(core, core->volume);
> + if (r) {
> + dev_err(&core->i2c_dev->dev,
> + "set volume fails: %d.\n", r);
> + goto out;
> + }
> +
> + dev_dbg(&core->i2c_dev->dev, "%s: Set vol: %d.\n",
> + __func__, core->volume);
> + } else {
> + r = wl1273_fm_set_tx_freq(core, core->tx_frequency);
> + if (r) {
> + dev_err(&core->i2c_dev->dev,
> + "set freq fails: %d.\n", r);
> + goto out;
> + }
> + }
> +
> + break;
> +
> + case WL1273_MODE_OFF:
> + r = wl1273_fm_stop(core);
> + if (r)
> + dev_err(&core->i2c_dev->dev,
> + "%s: Off fails: %d\n", __func__, r);
> + else
> + core->mode = WL1273_MODE_OFF;
> +
> + break;
> +
> + case WL1273_MODE_SUSPENDED:
> + r = wl1273_fm_suspend(core);
> + if (r)
> + dev_err(&core->i2c_dev->dev,
> + "%s: Suspend fails: %d\n", __func__, r);
> + else
> + core->mode = WL1273_MODE_SUSPENDED;
> +
> + break;
> +
> + default:
> + dev_err(&core->i2c_dev->dev, "%s: Unknown mode: %d\n",
> + __func__, mode);
> + r = -EINVAL;
> + break;
> + }
> +
> +out:
> + if (r)
> + core->mode = old_mode ;
> +
> + mutex_unlock(&core->lock);
> +
> + return r;
> +}
> +
> +static int wl1273_fm_set_seek(struct wl1273_core *core,
> + unsigned int wrap_around,
> + unsigned int seek_upward,
> + int level)
> +{
> + int r = 0;
> + unsigned int dir = (seek_upward == 0) ? 0 : 1;
> + unsigned int rx_frequency, top_frequency, bottom_frequency;
> +
> + rx_frequency = core->rx_frequency;
> + top_frequency = core->bands[core->band].top_frequency;
> + bottom_frequency = core->bands[core->band].bottom_frequency;
> + dev_dbg(&core->i2c_dev->dev, "core->rx_frequency: %d\n",
> + rx_frequency);
> +
> + if (dir && rx_frequency + core->spacing <= top_frequency)
> + r = wl1273_fm_set_rx_freq(core, rx_frequency + core->spacing);
> + else if (dir && wrap_around)
> + r = wl1273_fm_set_rx_freq(core, bottom_frequency);
> + else if (rx_frequency - core->spacing >= bottom_frequency)
> + r = wl1273_fm_set_rx_freq(core, rx_frequency - core->spacing);
> + else if (wrap_around)
> + r = wl1273_fm_set_rx_freq(core, top_frequency);
> +
> + if (r)
> + goto out;
> +
> + if (level < SCHAR_MIN || level > SCHAR_MAX)
> + return -EINVAL;
> +
> + INIT_COMPLETION(core->busy);
> + dev_dbg(&core->i2c_dev->dev, "%s: BUSY\n", __func__);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> + if (r)
> + goto out;
> +
> + dev_dbg(&core->i2c_dev->dev, "%s\n", __func__);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_SEARCH_LVL_SET, level);
> + if (r)
> + goto out;
> +
> + r = wl1273_fm_write_cmd(core, WL1273_SEARCH_DIR_SET, dir);
> + if (r)
> + goto out;
> +
> + r = wl1273_fm_write_cmd(core, WL1273_TUNER_MODE_SET,
> + TUNER_MODE_AUTO_SEEK);
> + if (r)
> + goto out;
> +
> + wait_for_completion_timeout(&core->busy, msecs_to_jiffies(1000));
> + if (!(core->irq_received & WL1273_BL_EVENT))
> + goto out;
> +
> + core->irq_received &= ~WL1273_BL_EVENT;
> +
> + if (!wrap_around)
> + goto out;
> +
> + /* Wrap around */
> + dev_dbg(&core->i2c_dev->dev, "Wrap around in HW seek.\n");
> +
> + if (seek_upward)
> + rx_frequency = bottom_frequency;
> + else
> + rx_frequency = top_frequency;
> +
> + r = wl1273_fm_set_rx_freq(core, rx_frequency);
> + if (r)
> + goto out;
> +
> + INIT_COMPLETION(core->busy);
> + dev_dbg(&core->i2c_dev->dev, "%s: BUSY\n", __func__);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_TUNER_MODE_SET,
> + TUNER_MODE_AUTO_SEEK);
> + if (r)
> + goto out;
> +
> + wait_for_completion_timeout(&core->busy, msecs_to_jiffies(1000));
> +out:
> + dev_dbg(&core->i2c_dev->dev, "%s: Err: %d\n", __func__, r);
> + return r;
> +}
> +
> +/**
> + * wl1273_fm_set_band() - Change the current band.
> + * @core: A pointer to the device structure.
> + * @band: The ID of the new band.
> + *
> + * Wl1273 supports only two bands USA/Europe and Japan.
> + */
> +static int wl1273_fm_set_band(struct wl1273_core *core, unsigned int band)
> +{
> + int r = 0;
> + unsigned int new_frequency = 0;
> +
> + dev_err(&core->i2c_dev->dev, "%s: number of resion: %d\n", __func__,
> + core->number_of_bands);
> +
> + if (band == core->band)
> + return 0;
> +
> + if (core->mode == WL1273_MODE_OFF ||
> + core->mode == WL1273_MODE_SUSPENDED)
> + return -EPERM;
> +
> + if (band >= core->number_of_bands)
> + return -EINVAL;
> +
> + mutex_lock(&core->lock);
> +
> + core->band = band;
> +
> + if (core->rx_frequency < core->bands[core->band].bottom_frequency)
> + new_frequency = core->bands[core->band].bottom_frequency;
> + else if (core->rx_frequency > core->bands[core->band].top_frequency)
> + new_frequency = core->bands[core->band].top_frequency;
> +
> + if (new_frequency) {
> + core->rx_frequency = new_frequency;
> + if (core->mode == WL1273_MODE_RX) {
> + r = wl1273_fm_set_rx_freq(core, new_frequency);
> + if (r)
> + goto out;
> + }
> + }
> +
> + new_frequency = 0;
> + if (core->tx_frequency < core->bands[core->band].bottom_frequency)
> + new_frequency = core->bands[core->band].bottom_frequency;
> + else if (core->tx_frequency > core->bands[core->band].top_frequency)
> + new_frequency = core->bands[core->band].top_frequency;
> +
> + if (new_frequency) {
> + core->tx_frequency = new_frequency;
> +
> + if (core->mode == WL1273_MODE_TX) {
> + r = wl1273_fm_set_tx_freq(core, new_frequency);
> + if (r)
> + goto out;
> + }
> + }
> +
> +out:
> + mutex_unlock(&core->lock);
> + return r;
> +}
> +
> +/**
> + * wl1273_fm_get_tx_ctune() - Get the TX tuning capacitor value.
> + * @core: A pointer to the device struct.
> + */
> +static unsigned int wl1273_fm_get_tx_ctune(struct wl1273_core *core)
> +{
> + struct i2c_client *client = core->i2c_dev;
> + u16 val;
> + int r;
> +
> + if (core->mode == WL1273_MODE_OFF ||
> + core->mode == WL1273_MODE_SUSPENDED)
> + return -EPERM;
> +
> + r = wl1273_fm_read_reg(core, WL1273_READ_FMANT_TUNE_VALUE, &val);
> + if (r) {
> + dev_err(&client->dev, "%s: I2C error: %d\n", __func__, r);
> + goto out;
> + }
> +
> +out:
> + return val;
> +}
> +
> +/**
> + * wl1273_fm_set_preemphasis() - Set the TX pre-emphasis value.
> + * @core: 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_core *core,
> + unsigned int preemphasis)
> +{
> + 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 = wl1273_fm_write_cmd(core, WL1273_PREMPH_SET, em);
> + if (r)
> + goto out;
> +
> + core->preemphasis = preemphasis;
> +
> +out:
> + mutex_unlock(&core->lock);
> + return r;
> +}
> +
> +static int wl1273_fm_rds_on(struct wl1273_core *core)
> +{
> + int r;
> +
> + dev_dbg(&core->i2c_dev->dev, "%s\n", __func__);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_SET,
> + WL1273_POWER_SET_FM | WL1273_POWER_SET_RDS);
> + if (r)
> + goto out;
> +
> + r = wl1273_fm_set_rx_freq(core, core->rx_frequency);
> + if (r)
> + dev_err(&core->i2c_dev->dev, "set freq fails: %d.\n", r);
> +out:
> + return r;
> +}
> +
> +static int wl1273_fm_rds_off(struct wl1273_core *core)
> +{
> + struct device *dev = &core->i2c_dev->dev;
> + int r;
> +
> + core->irq_flags &= ~WL1273_RDS_EVENT;
> +
> + r = wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> + if (r)
> + goto out;
> +
> + /* stop rds reception */
> + cancel_delayed_work(&core->work);
> +
> + /* Service pending read */
> + wake_up_interruptible(&core->read_queue);
> +
> + dev_dbg(dev, "%s\n", __func__);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_SET, WL1273_POWER_SET_FM);
> +
> +out:
> + dev_dbg(dev, "%s: exiting...\n", __func__);
> +
> + return r;
> +}
> +
> +static int wl1273_fm_set_rds(struct wl1273_core *core, unsigned int new_mode)
> +{
> + int r = 0;
> + struct i2c_client *client = core->i2c_dev;
> +
> + if (core->mode == WL1273_MODE_OFF ||
> + core->mode == WL1273_MODE_SUSPENDED)
> + return -EPERM;
> +
> + if (new_mode == WL1273_RDS_RESET) {
> + r = wl1273_fm_write_cmd(core, WL1273_RDS_CNTRL_SET, 1);
> + return r;
> + }
> +
> + mutex_lock(&core->lock);
> +
> + if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_OFF) {
> + r = wl1273_fm_write_cmd(core, WL1273_RDS_DATA_ENB, 0);
> + } else if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_ON) {
> + r = wl1273_fm_write_cmd(core, WL1273_RDS_DATA_ENB, 1);
> + } else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_OFF) {
> + r = wl1273_fm_rds_off(core);
> + } else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_ON) {
> + r = wl1273_fm_rds_on(core);
> + } else {
> + dev_err(&client->dev, "%s: Unknown mode: %d\n", __func__,
> + new_mode);
> + r = -EINVAL;
> + }
> +
> + if (!r)
> + core->rds_on = (new_mode == WL1273_RDS_ON) ? true : false;
> +
> + mutex_unlock(&core->lock);
> +
> + 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));
> + unsigned char *s;
> + u16 val;
> + int r;
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + if (radio->core->mode != WL1273_MODE_TX)
> + return count;
> +
> + if (!radio->rds_on) {
> + dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
> + return 0;
> + }
> +
> + if (mutex_lock_interruptible(&radio->core->lock))
> + return -EINTR;
> +
> + /* Manual Mode */
> + if (count > 255)
> + val = 255;
> + else
> + val = count;
> +
> + wl1273_fm_write_cmd(radio->core, WL1273_RDS_CONFIG_DATA_SET, val);
> +
> + s = kmalloc(val + 1, GFP_KERNEL);
Rather than continually allocating and freeing this buffer I would just make
it a field in struct wl1273_device. It's never more than 256 bytes, so that's
no problem.
> + if (!s) {
> + r = -ENOMEM;
> + goto out;
> + }
> +
> + if (copy_from_user(s + 1, buf, val)) {
> + kfree(s);
> + r = -EFAULT;
> + goto out;
> + }
> +
> + dev_dbg(radio->dev, "Count: %d\n", val);
> + dev_dbg(radio->dev, "From user: \"%s\"\n", s);
> +
> + s[0] = WL1273_RDS_DATA_SET;
> + wl1273_fm_write_data(radio->core, s, val + 1);
> +
> + kfree(s);
> + r = val;
> +
> +out:
> + mutex_unlock(&radio->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;
> + unsigned int rd_index, wr_index;
> +
> + /* TODO: handle the case of multiple readers */
Don't. Just make sure there can be only one reader. This is the same principle
used by video: there can be multiple file handles open on a video node, but
only one can be used for streaming at a time. Trying to handle multiple readers
or writers in a driver will lead to chaos. And this can be done much better by
userspace.
> +
> + poll_wait(file, &core->read_queue, pts);
> +
> + rd_index = core->rd_index;
> + wr_index = core->wr_index;
> + if (rd_index != wr_index)
> + return POLLIN | POLLRDNORM;
> +
> + 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 && core->rds_on && !radio->rds_on) {
> + dev_dbg(radio->dev, "%s: Mode: %d\n", __func__, core->mode);
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + core->irq_flags |= WL1273_RDS_EVENT;
> +
> + r = wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> + if (r) {
> + mutex_unlock(&core->lock);
> + goto out;
> + }
> +
> + radio->rds_on = true;
> + 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_on) {
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + core->irq_flags &= ~WL1273_RDS_EVENT;
> +
> + r = wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
> + core->irq_flags);
> + if (r) {
> + mutex_unlock(&core->lock);
> + goto out;
> + }
> +
> + radio->rds_on = false;
> + mutex_unlock(&core->lock);
> + }
> +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;
> +
> + /* TODO: handle the case of multiple readers */
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + if (radio->core->mode != WL1273_MODE_RX)
> + return 0;
> +
> + if (!radio->rds_on) {
> + dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
> + return 0;
> + }
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + /* block if no new data available */
> + while (core->wr_index == core->rd_index) {
> + if (file->f_flags & O_NONBLOCK) {
> + r = -EWOULDBLOCK;
> + goto out;
> + }
> +
> + if (wait_event_interruptible(core->read_queue,
> + core->wr_index !=
> + core->rd_index) < 0) {
> + r = -EINTR;
> + goto out;
> + }
> + }
> +
> + /* calculate block count from byte count */
> + count /= 3;
> +
> + /* copy RDS blocks from the internal buffer and to user buffer */
> +
> + while (block_count < count) {
> + if (core->rd_index == core->wr_index)
> + break;
> +
> + /* always transfer complete RDS blocks */
> + if (copy_to_user(buf, &core->buffer[core->rd_index], 3))
> + break;
> +
> + /* increment and wrap the read pointer */
> + core->rd_index += 3;
> + if (core->rd_index >= core->buf_size)
> + core->rd_index = 0;
> +
> + /* increment counters */
> + block_count++;
> + buf += 3;
> + r += 3;
> + }
> +
> +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,
> + .ioctl = video_ioctl2,
> + .open = wl1273_fm_fops_open,
> + .release = wl1273_fm_fops_release,
> +};
> +
> +static struct v4l2_queryctrl wl1273_v4l2_queryctrl[] = {
> + {
> + .id = V4L2_CID_AUDIO_VOLUME,
> + .type = V4L2_CTRL_TYPE_INTEGER,
> + .name = "Volume",
> + .minimum = 0,
> + .maximum = WL1273_MAX_VOLUME,
> + .step = 1,
> + .default_value = WL1273_DEFAULT_VOLUME,
> + },
> + {
> + .id = V4L2_CID_AUDIO_MUTE,
> + .type = V4L2_CTRL_TYPE_BOOLEAN,
> + .name = "Mute",
> + .minimum = 0,
> + .maximum = 1,
> + .step = 1,
> + .default_value = 1,
> + },
> + {
> + .id = V4L2_CID_AUDIO_LOUDNESS,
> + .flags = V4L2_CTRL_FLAG_DISABLED,
Huh?
> + },
> +};
Where are the other FM_TX controls?
> +
> +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));
> + sprintf(capability->bus_info, "I2C");
Use strlcpy here as well.
> +
> + 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;
> +}
> +
> +static int wl1273_fm_vidioc_queryctrl(struct file *file, void *priv,
> + struct v4l2_queryctrl *qc)
> +{
> + unsigned char i;
> + int r = -EINVAL;
> + struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + for (i = 0; i < ARRAY_SIZE(wl1273_v4l2_queryctrl); i++) {
> + if (qc->id && qc->id == wl1273_v4l2_queryctrl[i].id) {
> + memcpy(qc, &wl1273_v4l2_queryctrl[i], sizeof(*qc));
> + r = 0;
> + break;
I strongly recommend using v4l2_ctrl_query_fill() instead (defined in
v4l2-common.c). This ensures consistent naming. It will also make it easier
to convert to the upcoming new control framework.
> + }
> + }
> + if (r < 0)
> + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
> + ": query control failed with %d\n", r);
> + return r;
> +}
> +
> +/**
> + * 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_core *core, u16 power)
> +{
> + int r;
> +
> + if (core->mode == WL1273_MODE_OFF ||
> + core->mode == WL1273_MODE_SUSPENDED)
> + return -EPERM;
> +
> + mutex_lock(&core->lock);
> +
> + r = wl1273_fm_write_cmd(core, WL1273_POWER_LEV_SET, power);
> + if (r)
> + goto out;
> +
> + core->tx_power = power;
> +
> +out:
> + mutex_unlock(&core->lock);
> + return r;
> +}
> +
> +static int wl1273_fm_tx_set_spacing(struct wl1273_core *core,
> + unsigned int spacing)
> +{
> + int r;
> +
> + switch (spacing) {
> + case 50:
> + r = wl1273_fm_write_cmd(core, WL1273_SCAN_SPACING_SET, 1);
> + break;
> + case 100:
> + r = wl1273_fm_write_cmd(core, WL1273_SCAN_SPACING_SET, 2);
> + break;
> + case 200:
> + r = wl1273_fm_write_cmd(core, WL1273_SCAN_SPACING_SET, 4);
> + break;
> + default:
> + dev_warn(&core->i2c_dev->dev,
> + "Unexpected spacing: %d, using 50kHz.", spacing);
Make this dev_dbg. I think it is probably better to pick the closest spacing
rather than falling back to 50.
> + r = wl1273_fm_write_cmd(core, WL1273_SCAN_SPACING_SET, 1);
> + break;
You must also be able to handle a spacing of 0.
> + }
> +
> + return r;
> +}
> +
> +static int wl1273_fm_vidioc_g_ctrl(struct file *file, void *priv,
> + struct v4l2_control *ctrl)
> +{
> + struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
> + struct wl1273_core *core = radio->core;
> + u16 val;
> + int r = 0;
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + switch (ctrl->id) {
> + case V4L2_CID_AUDIO_MUTE:
> + if (core->mode == WL1273_MODE_RX)
> + r = wl1273_fm_read_reg(core, WL1273_MUTE_STATUS_SET,
> + &val);
> + else
> + r = wl1273_fm_read_reg(core, WL1273_MUTE, &val);
> +
> + if (r)
> + goto out;
> +
> + dev_dbg(radio->dev,
> + "MUTE STATUS GET: 0x%02x\n", val);
> +
> + if (val)
> + ctrl->value = 1;
> + else
> + ctrl->value = 0;
> +
> + break;
> +
> + case V4L2_CID_AUDIO_VOLUME:
> + ctrl->value = core->volume;
> + break;
> +
> + case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
> + ctrl->value = wl1273_fm_get_tx_ctune(core);
> + break;
> +
> + case V4L2_CID_TUNE_PREEMPHASIS:
> + ctrl->value = core->preemphasis;
> + break;
> +
> + case V4L2_CID_TUNE_POWER_LEVEL:
> + ctrl->value = core->tx_power;
> + break;
> +
> + case WL1273_CID_FM_BAND:
> + ctrl->value = core->band;
> + break;
> +
> + default:
> + dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
> + __func__, ctrl->id);
> + break;
> + }
> +
> +out:
> + mutex_unlock(&core->lock);
> +
> + return r;
> +}
> +
> +#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 int wl1273_fm_vidioc_s_ctrl(struct file *file, void *priv,
> + struct v4l2_control *ctrl)
> +{
> + 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__);
> +
> + switch (ctrl->id) {
> + case V4L2_CID_AUDIO_MUTE:
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + if (core->mode == WL1273_MODE_RX && ctrl->value)
> + r = wl1273_fm_write_cmd(core,
> + WL1273_MUTE_STATUS_SET,
> + WL1273_MUTE_HARD_LEFT |
> + WL1273_MUTE_HARD_RIGHT);
> + else if (core->mode == WL1273_MODE_RX)
> + r = wl1273_fm_write_cmd(core,
> + WL1273_MUTE_STATUS_SET, 0x0);
> + else if (core->mode == WL1273_MODE_TX && ctrl->value)
> + r = wl1273_fm_write_cmd(core, WL1273_MUTE, 1);
> + else if (core->mode == WL1273_MODE_TX)
> + r = wl1273_fm_write_cmd(core, WL1273_MUTE, 0);
> +
> + mutex_unlock(&core->lock);
> + break;
> +
> + case V4L2_CID_AUDIO_VOLUME: {
> + u16 val;
> +
> + r = wl1273_fm_read_reg(core, WL1273_VOLUME_SET, &val);
> + if (r)
> + break;
> +
> + ctrl->value = val;
> + break;
> + }
> +
> + case V4L2_CID_TUNE_PREEMPHASIS:
> + r = wl1273_fm_set_preemphasis(core, ctrl->value);
> + break;
> +
> + case V4L2_CID_TUNE_POWER_LEVEL:
> + r = wl1273_fm_set_tx_power(core, ctrl->value);
> + break;
> +
> + case WL1273_CID_FM_BAND:
> + r = wl1273_fm_set_band(core, ctrl->value);
> + 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;
> +
> + strcpy(audio->name, "Radio");
strlcpy
> + 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;
> +
> + strcpy(tuner->name, WL1273_FM_DRIVER_NAME);
> + tuner->type = V4L2_TUNER_RADIO;
> +
> + tuner->rangelow =
> + core->bands[core->band].bottom_frequency * WL1273_FREQ_MULT;
> + tuner->rangehigh =
> + core->bands[core->band].top_frequency * WL1273_FREQ_MULT;
> +
> + tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
> + tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS;
> +
> + if (core->mode != WL1273_MODE_RX)
> + return 0;
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + r = wl1273_fm_read_reg(core, WL1273_RSSI_LVL_GET, &val);
> + if (r)
> + goto out;
> +
> + tuner->signal = val * 256;
> + dev_dbg(radio->dev, "Signal: %d\n", tuner->signal);
> +
> + tuner->afc = 0;
> +
> + r = wl1273_fm_read_reg(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__);
> +
> + if (tuner->index > 0)
> + return -EINVAL;
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + r = wl1273_fm_set_mode(core, WL1273_MODE_RX);
> + if (r)
> + goto out;
> +
> + if (tuner->rxsubchans & V4L2_TUNER_SUB_RDS)
> + r = wl1273_fm_set_rds(core, WL1273_RDS_ON);
> + else
> + r = wl1273_fm_set_rds(core, WL1273_RDS_OFF);
> +
> + if (r)
> + dev_warn(radio->dev, "%s: RDS fails: %d\n", __func__, r);
> +
> + if (tuner->audmode == V4L2_TUNER_MODE_MONO)
> + r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
> + WL1273_RX_MONO);
> + else
> + r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
> + WL1273_RX_STEREO);
> +
> + if (r < 0)
> + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
> + ": set tuner mode failed with %d\n", r);
> +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_fm_get_freq(core) * WL1273_FREQ_MULT;
> +
> + 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;
> +
> + wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET, core->irq_flags);
> +
> + if (core->mode == WL1273_MODE_RX) {
> + r = wl1273_fm_set_rx_freq(core, freq->frequency *
> + WL1273_INV_FREQ_MULT);
> + if (r)
> + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
> + ": set frequency failed with %d\n", r);
> + } else {
> + r = wl1273_fm_set_tx_freq(core, freq->frequency *
> + WL1273_INV_FREQ_MULT);
> + 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;
> +}
> +
> +static int wl1273_fm_vidioc_g_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;
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + if (core->mode != WL1273_MODE_RX)
> + return 0;
> +
> + if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO)
> + return -EINVAL;
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + seek->level_min = SCHAR_MIN;
> + seek->level_max = SCHAR_MAX;
> +
> + mutex_unlock(&core->lock);
> +
> + return 0;
> +}
> +
> +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(core, WL1273_MODE_RX);
> + if (r)
> + goto out;
> +
> + r = wl1273_fm_tx_set_spacing(core, seek->spacing);
> + if (r)
> + dev_warn(radio->dev, "HW seek failed: %d\n", r);
> +
> + r = wl1273_fm_set_seek(core, seek->wrap_around, seek->seek_upward,
> + seek->level);
> + if (r)
> + dev_warn(radio->dev, "HW seek failed: %d\n", r);
> +
> + mutex_unlock(&core->lock);
> + out:
> + 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(core, WL1273_MODE_TX);
> + if (r)
> + goto out;
> +
> + if (modulator->txsubchans & V4L2_TUNER_SUB_RDS)
> + r = wl1273_fm_set_rds(core, WL1273_RDS_ON);
> + else
> + r = wl1273_fm_set_rds(core, WL1273_RDS_OFF);
> +
> +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;
> +
> + dev_dbg(radio->dev, "%s\n", __func__);
> +
> + if (mutex_lock_interruptible(&core->lock))
> + return -EINTR;
> +
> + modulator->rangelow =
> + core->bands[core->band].bottom_frequency * WL1273_FREQ_MULT;
> + modulator->rangehigh =
> + core->bands[core->band].top_frequency * WL1273_FREQ_MULT;
> +
> + modulator->capability = V4L2_TUNER_CAP_RDS;
> +
> + if (core->rds_on)
> + modulator->txsubchans |= V4L2_TUNER_SUB_RDS;
> + else
> + modulator->txsubchans &= ~V4L2_TUNER_SUB_RDS;
> +
> + 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;
> + u16 val;
> + int r;
> +
> + dev_info(radio->dev, DRIVER_DESC);
> +
> + if (core->mode == WL1273_MODE_OFF) {
> + dev_info(radio->dev, "Mode: Off\n");
> + return 0;
> + }
> +
> + if (core->mode == WL1273_MODE_SUSPENDED) {
> + dev_info(radio->dev, "Mode: Suspended\n");
> + return 0;
> + }
> +
> + r = wl1273_fm_read_reg(core, WL1273_ASIC_ID_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get ASIC_ID fails.\n", __func__);
> + else
> + dev_info(radio->dev, "ASIC_ID: 0x%04x\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_ASIC_VER_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get ASIC_VER fails.\n",
> + __func__);
> + else
> + dev_info(radio->dev, "ASIC Version: 0x%04x\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_FIRM_VER_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get FIRM_VER fails.\n", __func__);
> + else
> + dev_info(radio->dev, "FW version: %d(0x%04x)\n", val, val);
> +
> + /* TODO: Add TX stuff */
> + if (core->mode != WL1273_MODE_RX)
> + return 0;
> +
> + r = wl1273_fm_read_reg(core, WL1273_FREQ_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get FREQ fails.\n", __func__);
> + else
> + dev_info(radio->dev, "RX Frequency: %dkHz\n",
> + core->bands[core->band].bottom_frequency + val*50);
> +
> + r = wl1273_fm_read_reg(core, WL1273_MOST_MODE_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get MOST_MODE fails.\n",
> + __func__);
> + else if (val == 0)
> + dev_info(radio->dev,
> + "MOST_MODE: Stereo output according to blend\n");
> + else if (val == 1)
> + dev_info(radio->dev, "MOST_MODE: Force mono output\n");
> + else
> + dev_info(radio->dev, "MOST_MODE: Unexpected value: %d\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_MOST_BLEND_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get MOST_BLEND fails.\n", __func__);
> + else if (val == 0)
> + dev_info(radio->dev,
> + "MOST_BLEND: Switched blend with hysteresis.\n");
> + else if (val == 1)
> + dev_info(radio->dev, "MOST_BLEND: Soft blend.\n");
> + else
> + dev_info(radio->dev, "MOST_BLEND: Unexpected value: %d\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_STEREO_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get STEREO fails.\n", __func__);
> + else if (val == 0)
> + dev_info(radio->dev, "STEREO: Not detected\n");
> + else if (val == 1)
> + dev_info(radio->dev, "STEREO: Detected\n");
> + else
> + dev_info(radio->dev, "STEREO: Unexpected value: %d\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_RSSI_LVL_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get RSSI_LVL fails.\n", __func__);
> + else
> + dev_info(radio->dev, "RX signal strength: %d\n", (s16) val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_POWER_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get POWER fails.\n", __func__);
> + else
> + dev_info(radio->dev, "POWER: 0x%04x\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_INT_MASK_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get INT_MASK fails.\n", __func__);
> + else
> + dev_info(radio->dev, "INT_MASK: 0x%04x\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_RDS_SYNC_GET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get RDS_SYNC fails.\n",
> + __func__);
> + else if (val == 0)
> + dev_info(radio->dev, "RDS_SYNC: Not synchronized\n");
> +
> + else if (val == 1)
> + dev_info(radio->dev, "RDS_SYNC: Synchronized\n");
> + else
> + dev_info(radio->dev, "RDS_SYNC: Unexpected value: %d\n", val);
> +
> + r = wl1273_fm_read_reg(core, WL1273_I2S_MODE_CONFIG_SET, &val);
> + if (r)
> + dev_err(radio->dev, "%s: Get I2S_MODE_CONFIG fails.\n",
> + __func__);
> + else
> + dev_info(radio->dev, "I2S_MODE_CONFIG: 0x%04x\n", val);
> +
> + return 0;
> +}
> +
> +static void wl1273_vdev_release(struct video_device *dev)
> +{
> +}
> +
> +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_queryctrl = wl1273_fm_vidioc_queryctrl,
> + .vidioc_g_ctrl = wl1273_fm_vidioc_g_ctrl,
> + .vidioc_s_ctrl = wl1273_fm_vidioc_s_ctrl,
> + .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_g_hw_freq_seek = wl1273_fm_vidioc_g_hw_freq_seek,
> + .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);;
> +
> + dev_info(&pdev->dev, "%s.\n", __func__);
> +
> + video_unregister_device(&radio->videodev);
> + v4l2_device_unregister(&radio->v4l2dev);
> + kfree(radio);
> +
> + return 0;
> +}
> +
> +static int __devinit wl1273_fm_radio_probe(struct platform_device *pdev)
> +{
> + struct wl1273_core **pdata = pdev->dev.platform_data;
> + struct wl1273_device *radio;
> + int r = 0;
> +
> + dev_dbg(&pdev->dev, "%s\n", __func__);
> +
> + if (!pdata) {
> + dev_err(&pdev->dev, "No platform data.\n");
> + return -EINVAL;
> + }
> +
> + radio = kzalloc(sizeof(*radio), GFP_KERNEL);
> + if (!radio)
> + return -ENOMEM;
> +
> + radio->core = *pdata;
> + radio->dev = &pdev->dev;
> + radio->rds_on = false;
> +
> + r = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
> + if (r) {
> + dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
> + goto err_device_alloc;
> + }
> +
> + /* V4L2 configuration */
> + memcpy(&radio->videodev, &wl1273_viddev_template,
> + sizeof(wl1273_viddev_template));
> +
> + radio->videodev.v4l2_dev = &radio->v4l2dev;
> +
> + /* 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 err_video_register;
> + }
> +
> + video_set_drvdata(&radio->videodev, radio);
> + platform_set_drvdata(pdev, radio);
> +
> + return 0;
> +
> +err_video_register:
> + v4l2_device_unregister(&radio->v4l2dev);
> +err_device_alloc:
> + kfree(radio);
> +
> + 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)
> +{
> + flush_scheduled_work();
> + 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.aalto...@nokia.com>");
> +MODULE_DESCRIPTION(DRIVER_DESC);
> +MODULE_LICENSE("GPL");
>
Regards,
Hans
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG, part of Cisco
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