diff options
Diffstat (limited to 'drivers/media/radio/radio-wl1273.c')
| -rw-r--r-- | drivers/media/radio/radio-wl1273.c | 2161 |
1 files changed, 2161 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c new file mode 100644 index 000000000..484046471 --- /dev/null +++ b/drivers/media/radio/radio-wl1273.c @@ -0,0 +1,2161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for the Texas Instruments WL1273 FM radio. + * + * Copyright (C) 2011 Nokia Corporation + * Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com> + */ + +#include <linux/delay.h> +#include <linux/firmware.h> +#include <linux/interrupt.h> +#include <linux/mfd/wl1273-core.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> + +#define DRIVER_DESC "Wl1273 FM Radio" + +#define WL1273_POWER_SET_OFF 0 +#define WL1273_POWER_SET_FM BIT(0) +#define WL1273_POWER_SET_RDS BIT(1) +#define WL1273_POWER_SET_RETENTION BIT(4) + +#define WL1273_PUPD_SET_OFF 0x00 +#define WL1273_PUPD_SET_ON 0x01 +#define WL1273_PUPD_SET_RETENTION 0x10 + +#define WL1273_FREQ(x) (x * 10000 / 625) +#define WL1273_INV_FREQ(x) (x * 625 / 10000) + +/* + * static int radio_nr - The number of the radio device + * + * The default is 0. + */ +static int radio_nr; +module_param(radio_nr, int, 0); +MODULE_PARM_DESC(radio_nr, "The number of the radio device. Default = 0"); + +struct wl1273_device { + char *bus_type; + + u8 forbidden; + unsigned int preemphasis; + unsigned int spacing; + unsigned int tx_power; + unsigned int rx_frequency; + unsigned int tx_frequency; + unsigned int rangelow; + unsigned int rangehigh; + unsigned int band; + bool stereo; + + /* RDS */ + unsigned int rds_on; + + wait_queue_head_t read_queue; + struct mutex lock; /* for serializing fm radio operations */ + struct completion busy; + + unsigned char *buffer; + unsigned int buf_size; + unsigned int rd_index; + unsigned int wr_index; + + /* Selected interrupts */ + u16 irq_flags; + u16 irq_received; + + struct v4l2_ctrl_handler ctrl_handler; + struct v4l2_device v4l2dev; + struct video_device videodev; + struct device *dev; + struct wl1273_core *core; + struct file *owner; + char *write_buf; + unsigned int rds_users; +}; + +#define WL1273_IRQ_MASK (WL1273_FR_EVENT | \ + WL1273_POW_ENB_EVENT) + +/* + * static unsigned int rds_buf - the number of RDS buffer blocks used. + * + * The default number is 100. + */ +static unsigned int rds_buf = 100; +module_param(rds_buf, uint, 0); +MODULE_PARM_DESC(rds_buf, "Number of RDS buffer entries. Default = 100"); + +static int wl1273_fm_write_fw(struct wl1273_core *core, + __u8 *fw, int len) +{ + struct i2c_client *client = core->client; + struct i2c_msg msg; + int i, r = 0; + + msg.addr = client->addr; + msg.flags = 0; + + for (i = 0; i <= len; i++) { + msg.len = fw[0]; + msg.buf = fw + 1; + + fw += msg.len + 1; + dev_dbg(&client->dev, "%s:len[%d]: %d\n", __func__, i, msg.len); + + r = i2c_transfer(client->adapter, &msg, 1); + if (r < 0 && i < len + 1) + break; + } + + dev_dbg(&client->dev, "%s: i: %d\n", __func__, i); + dev_dbg(&client->dev, "%s: len + 1: %d\n", __func__, len + 1); + + /* Last transfer always fails. */ + if (i == len || r == 1) + r = 0; + + return r; +} + +#define WL1273_FIFO_HAS_DATA(status) (1 << 5 & status) +#define WL1273_RDS_CORRECTABLE_ERROR (1 << 3) +#define WL1273_RDS_UNCORRECTABLE_ERROR (1 << 4) + +static int wl1273_fm_rds(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + struct i2c_client *client = core->client; + u16 val; + u8 b0 = WL1273_RDS_DATA_GET, status; + struct v4l2_rds_data rds = { 0, 0, 0 }; + struct i2c_msg msg[] = { + { + .addr = client->addr, + .flags = 0, + .buf = &b0, + .len = 1, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .buf = (u8 *) &rds, + .len = sizeof(rds), + } + }; + int r; + + if (core->mode != WL1273_MODE_RX) + return 0; + + r = core->read(core, WL1273_RDS_SYNC_GET, &val); + if (r) + return r; + + if ((val & 0x01) == 0) { + /* RDS decoder not synchronized */ + return -EAGAIN; + } + + /* copy all four RDS blocks to internal buffer */ + do { + r = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + if (r != ARRAY_SIZE(msg)) { + dev_err(radio->dev, WL1273_FM_DRIVER_NAME + ": %s: read_rds error r == %i)\n", + __func__, r); + } + + status = rds.block; + + if (!WL1273_FIFO_HAS_DATA(status)) + break; + + /* copy bits 0-2 (the block ID) to bits 3-5 */ + rds.block = V4L2_RDS_BLOCK_MSK & status; + rds.block |= rds.block << 3; + + /* copy the error bits to standard positions */ + if (WL1273_RDS_UNCORRECTABLE_ERROR & status) { + rds.block |= V4L2_RDS_BLOCK_ERROR; + rds.block &= ~V4L2_RDS_BLOCK_CORRECTED; + } else if (WL1273_RDS_CORRECTABLE_ERROR & status) { + rds.block &= ~V4L2_RDS_BLOCK_ERROR; + rds.block |= V4L2_RDS_BLOCK_CORRECTED; + } + + /* copy RDS block to internal buffer */ + memcpy(&radio->buffer[radio->wr_index], &rds, RDS_BLOCK_SIZE); + radio->wr_index += 3; + + /* wrap write pointer */ + if (radio->wr_index >= radio->buf_size) + radio->wr_index = 0; + + /* check for overflow & start over */ + if (radio->wr_index == radio->rd_index) { + dev_dbg(radio->dev, "RDS OVERFLOW"); + + radio->rd_index = 0; + radio->wr_index = 0; + break; + } + } while (WL1273_FIFO_HAS_DATA(status)); + + /* wake up read queue */ + if (radio->wr_index != radio->rd_index) + wake_up_interruptible(&radio->read_queue); + + return 0; +} + +static irqreturn_t wl1273_fm_irq_thread_handler(int irq, void *dev_id) +{ + struct wl1273_device *radio = dev_id; + struct wl1273_core *core = radio->core; + u16 flags; + int r; + + r = core->read(core, WL1273_FLAG_GET, &flags); + if (r) + goto out; + + if (flags & WL1273_BL_EVENT) { + radio->irq_received = flags; + dev_dbg(radio->dev, "IRQ: BL\n"); + } + + if (flags & WL1273_RDS_EVENT) { + msleep(200); + + wl1273_fm_rds(radio); + } + + if (flags & WL1273_BBLK_EVENT) + dev_dbg(radio->dev, "IRQ: BBLK\n"); + + if (flags & WL1273_LSYNC_EVENT) + dev_dbg(radio->dev, "IRQ: LSYNC\n"); + + if (flags & WL1273_LEV_EVENT) { + u16 level; + + r = core->read(core, WL1273_RSSI_LVL_GET, &level); + if (r) + goto out; + + if (level > 14) + dev_dbg(radio->dev, "IRQ: LEV: 0x%x04\n", level); + } + + if (flags & WL1273_IFFR_EVENT) + dev_dbg(radio->dev, "IRQ: IFFR\n"); + + if (flags & WL1273_PI_EVENT) + dev_dbg(radio->dev, "IRQ: PI\n"); + + if (flags & WL1273_PD_EVENT) + dev_dbg(radio->dev, "IRQ: PD\n"); + + if (flags & WL1273_STIC_EVENT) + dev_dbg(radio->dev, "IRQ: STIC\n"); + + if (flags & WL1273_MAL_EVENT) + dev_dbg(radio->dev, "IRQ: MAL\n"); + + if (flags & WL1273_POW_ENB_EVENT) { + complete(&radio->busy); + dev_dbg(radio->dev, "NOT BUSY\n"); + dev_dbg(radio->dev, "IRQ: POW_ENB\n"); + } + + if (flags & WL1273_SCAN_OVER_EVENT) + dev_dbg(radio->dev, "IRQ: SCAN_OVER\n"); + + if (flags & WL1273_ERROR_EVENT) + dev_dbg(radio->dev, "IRQ: ERROR\n"); + + if (flags & WL1273_FR_EVENT) { + u16 freq; + + dev_dbg(radio->dev, "IRQ: FR:\n"); + + if (core->mode == WL1273_MODE_RX) { + r = core->write(core, WL1273_TUNER_MODE_SET, + TUNER_MODE_STOP_SEARCH); + if (r) { + dev_err(radio->dev, + "%s: TUNER_MODE_SET fails: %d\n", + __func__, r); + goto out; + } + + r = core->read(core, WL1273_FREQ_SET, &freq); + if (r) + goto out; + + if (radio->band == WL1273_BAND_JAPAN) + radio->rx_frequency = WL1273_BAND_JAPAN_LOW + + freq * 50; + else + radio->rx_frequency = WL1273_BAND_OTHER_LOW + + freq * 50; + /* + * The driver works better with this msleep, + * the documentation doesn't mention it. + */ + usleep_range(10000, 15000); + + dev_dbg(radio->dev, "%dkHz\n", radio->rx_frequency); + + } else { + r = core->read(core, WL1273_CHANL_SET, &freq); + if (r) + goto out; + + dev_dbg(radio->dev, "%dkHz\n", freq); + } + dev_dbg(radio->dev, "%s: NOT BUSY\n", __func__); + } + +out: + core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); + complete(&radio->busy); + + return IRQ_HANDLED; +} + +static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq) +{ + struct wl1273_core *core = radio->core; + int r = 0; + unsigned long t; + + if (freq < WL1273_BAND_TX_LOW) { + dev_err(radio->dev, + "Frequency out of range: %d < %d\n", freq, + WL1273_BAND_TX_LOW); + return -ERANGE; + } + + if (freq > WL1273_BAND_TX_HIGH) { + dev_err(radio->dev, + "Frequency out of range: %d > %d\n", freq, + WL1273_BAND_TX_HIGH); + return -ERANGE; + } + + /* + * The driver works better with this sleep, + * the documentation doesn't mention it. + */ + usleep_range(5000, 10000); + + dev_dbg(radio->dev, "%s: freq: %d kHz\n", __func__, freq); + + /* Set the current tx channel */ + r = core->write(core, WL1273_CHANL_SET, freq / 10); + if (r) + return r; + + reinit_completion(&radio->busy); + + /* wait for the FR IRQ */ + t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000)); + if (!t) + return -ETIMEDOUT; + + dev_dbg(radio->dev, "WL1273_CHANL_SET: %lu\n", t); + + /* Enable the output power */ + r = core->write(core, WL1273_POWER_ENB_SET, 1); + if (r) + return r; + + reinit_completion(&radio->busy); + + /* wait for the POWER_ENB IRQ */ + t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)); + if (!t) + return -ETIMEDOUT; + + radio->tx_frequency = freq; + dev_dbg(radio->dev, "WL1273_POWER_ENB_SET: %lu\n", t); + + return 0; +} + +static int wl1273_fm_set_rx_freq(struct wl1273_device *radio, unsigned int freq) +{ + struct wl1273_core *core = radio->core; + int r, f; + unsigned long t; + + if (freq < radio->rangelow) { + dev_err(radio->dev, + "Frequency out of range: %d < %d\n", freq, + radio->rangelow); + r = -ERANGE; + goto err; + } + + if (freq > radio->rangehigh) { + dev_err(radio->dev, + "Frequency out of range: %d > %d\n", freq, + radio->rangehigh); + r = -ERANGE; + goto err; + } + + dev_dbg(radio->dev, "%s: %dkHz\n", __func__, freq); + + core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); + + if (radio->band == WL1273_BAND_JAPAN) + f = (freq - WL1273_BAND_JAPAN_LOW) / 50; + else + f = (freq - WL1273_BAND_OTHER_LOW) / 50; + + r = core->write(core, WL1273_FREQ_SET, f); + if (r) { + dev_err(radio->dev, "FREQ_SET fails\n"); + goto err; + } + + r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_PRESET); + if (r) { + dev_err(radio->dev, "TUNER_MODE_SET fails\n"); + goto err; + } + + reinit_completion(&radio->busy); + + t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000)); + if (!t) { + dev_err(radio->dev, "%s: TIMEOUT\n", __func__); + return -ETIMEDOUT; + } + + radio->rd_index = 0; + radio->wr_index = 0; + radio->rx_frequency = freq; + return 0; +err: + return r; +} + +static int wl1273_fm_get_freq(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + unsigned int freq; + u16 f; + int r; + + if (core->mode == WL1273_MODE_RX) { + r = core->read(core, WL1273_FREQ_SET, &f); + if (r) + return r; + + dev_dbg(radio->dev, "Freq get: 0x%04x\n", f); + if (radio->band == WL1273_BAND_JAPAN) + freq = WL1273_BAND_JAPAN_LOW + 50 * f; + else + freq = WL1273_BAND_OTHER_LOW + 50 * f; + } else { + r = core->read(core, WL1273_CHANL_SET, &f); + if (r) + return r; + + freq = f * 10; + } + + return freq; +} + +/** + * wl1273_fm_upload_firmware_patch() - Upload the firmware. + * @radio: A pointer to the device struct. + * + * The firmware file consists of arrays of bytes where the first byte + * gives the array length. The first byte in the file gives the + * number of these arrays. + */ +static int wl1273_fm_upload_firmware_patch(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + unsigned int packet_num; + const struct firmware *fw_p; + const char *fw_name = "radio-wl1273-fw.bin"; + struct device *dev = radio->dev; + __u8 *ptr; + int r; + + dev_dbg(dev, "%s:\n", __func__); + + /* + * Uploading the firmware patch is not always necessary, + * so we only print an info message. + */ + if (request_firmware(&fw_p, fw_name, dev)) { + dev_info(dev, "%s - %s not found\n", __func__, fw_name); + + return 0; + } + + ptr = (__u8 *) fw_p->data; + packet_num = ptr[0]; + dev_dbg(dev, "%s: packets: %d\n", __func__, packet_num); + + r = wl1273_fm_write_fw(core, ptr + 1, packet_num); + if (r) { + dev_err(dev, "FW upload error: %d\n", r); + goto out; + } + + /* ignore possible error here */ + core->write(core, WL1273_RESET, 0); + + dev_dbg(dev, "%s - download OK, r: %d\n", __func__, r); +out: + release_firmware(fw_p); + return r; +} + +static int wl1273_fm_stop(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + + if (core->mode == WL1273_MODE_RX) { + int r = core->write(core, WL1273_POWER_SET, + WL1273_POWER_SET_OFF); + if (r) + dev_err(radio->dev, "%s: POWER_SET fails: %d\n", + __func__, r); + } else if (core->mode == WL1273_MODE_TX) { + int r = core->write(core, WL1273_PUPD_SET, + WL1273_PUPD_SET_OFF); + if (r) + dev_err(radio->dev, + "%s: PUPD_SET fails: %d\n", __func__, r); + } + + if (core->pdata->disable) { + core->pdata->disable(); + dev_dbg(radio->dev, "Back to reset\n"); + } + + return 0; +} + +static int wl1273_fm_start(struct wl1273_device *radio, int new_mode) +{ + struct wl1273_core *core = radio->core; + struct wl1273_fm_platform_data *pdata = core->pdata; + struct device *dev = radio->dev; + int r = -EINVAL; + + if (pdata->enable && core->mode == WL1273_MODE_OFF) { + dev_dbg(radio->dev, "Out of reset\n"); + + pdata->enable(); + msleep(250); + } + + if (new_mode == WL1273_MODE_RX) { + u16 val = WL1273_POWER_SET_FM; + + if (radio->rds_on) + val |= WL1273_POWER_SET_RDS; + + /* If this fails try again */ + r = core->write(core, WL1273_POWER_SET, val); + if (r) { + msleep(100); + + r = core->write(core, WL1273_POWER_SET, val); + if (r) { + dev_err(dev, "%s: POWER_SET fails\n", __func__); + goto fail; + } + } + + /* rds buffer configuration */ + radio->wr_index = 0; + radio->rd_index = 0; + + } else if (new_mode == WL1273_MODE_TX) { + /* If this fails try again once */ + r = core->write(core, WL1273_PUPD_SET, WL1273_PUPD_SET_ON); + if (r) { + msleep(100); + r = core->write(core, WL1273_PUPD_SET, + WL1273_PUPD_SET_ON); + if (r) { + dev_err(dev, "%s: PUPD_SET fails\n", __func__); + goto fail; + } + } + + if (radio->rds_on) { + r = core->write(core, WL1273_RDS_DATA_ENB, 1); + if (r) { + dev_err(dev, "%s: RDS_DATA_ENB ON fails\n", + __func__); + goto fail; + } + } else { + r = core->write(core, WL1273_RDS_DATA_ENB, 0); + if (r) { + dev_err(dev, "%s: RDS_DATA_ENB OFF fails\n", + __func__); + goto fail; + } + } + } else { + dev_warn(dev, "%s: Illegal mode.\n", __func__); + } + + if (core->mode == WL1273_MODE_OFF) { + r = wl1273_fm_upload_firmware_patch(radio); + if (r) + dev_warn(dev, "Firmware upload failed.\n"); + + /* + * Sometimes the chip is in a wrong power state at this point. + * So we set the power once again. + */ + if (new_mode == WL1273_MODE_RX) { + u16 val = WL1273_POWER_SET_FM; + + if (radio->rds_on) + val |= WL1273_POWER_SET_RDS; + + r = core->write(core, WL1273_POWER_SET, val); + if (r) { + dev_err(dev, "%s: POWER_SET fails\n", __func__); + goto fail; + } + } else if (new_mode == WL1273_MODE_TX) { + r = core->write(core, WL1273_PUPD_SET, + WL1273_PUPD_SET_ON); + if (r) { + dev_err(dev, "%s: PUPD_SET fails\n", __func__); + goto fail; + } + } + } + + return 0; +fail: + if (pdata->disable) + pdata->disable(); + + dev_dbg(dev, "%s: return: %d\n", __func__, r); + return r; +} + +static int wl1273_fm_suspend(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + int r; + + /* Cannot go from OFF to SUSPENDED */ + if (core->mode == WL1273_MODE_RX) + r = core->write(core, WL1273_POWER_SET, + WL1273_POWER_SET_RETENTION); + else if (core->mode == WL1273_MODE_TX) + r = core->write(core, WL1273_PUPD_SET, + WL1273_PUPD_SET_RETENTION); + else + r = -EINVAL; + + if (r) { + dev_err(radio->dev, "%s: POWER_SET fails: %d\n", __func__, r); + goto out; + } + +out: + return r; +} + +static int wl1273_fm_set_mode(struct wl1273_device *radio, int mode) +{ + struct wl1273_core *core = radio->core; + struct device *dev = radio->dev; + int old_mode; + int r; + + dev_dbg(dev, "%s\n", __func__); + dev_dbg(dev, "Forbidden modes: 0x%02x\n", radio->forbidden); + + old_mode = core->mode; + if (mode & radio->forbidden) { + r = -EPERM; + goto out; + } + + switch (mode) { + case WL1273_MODE_RX: + case WL1273_MODE_TX: + r = wl1273_fm_start(radio, mode); + if (r) { + dev_err(dev, "%s: Cannot start.\n", __func__); + wl1273_fm_stop(radio); + goto out; + } + + core->mode = mode; + r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); + if (r) { + dev_err(dev, "INT_MASK_SET fails.\n"); + goto out; + } + + /* remember previous settings */ + if (mode == WL1273_MODE_RX) { + r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency); + if (r) { + dev_err(dev, "set freq fails: %d.\n", r); + goto out; + } + + r = core->set_volume(core, core->volume); + if (r) { + dev_err(dev, "set volume fails: %d.\n", r); + goto out; + } + + dev_dbg(dev, "%s: Set vol: %d.\n", __func__, + core->volume); + } else { + r = wl1273_fm_set_tx_freq(radio, radio->tx_frequency); + if (r) { + dev_err(dev, "set freq fails: %d.\n", r); + goto out; + } + } + + dev_dbg(radio->dev, "%s: Set audio mode.\n", __func__); + + r = core->set_audio(core, core->audio_mode); + if (r) + dev_err(dev, "Cannot set audio mode.\n"); + break; + + case WL1273_MODE_OFF: + r = wl1273_fm_stop(radio); + if (r) + dev_err(dev, "%s: Off fails: %d\n", __func__, r); + else + core->mode = WL1273_MODE_OFF; + + break; + + case WL1273_MODE_SUSPENDED: + r = wl1273_fm_suspend(radio); + if (r) + dev_err(dev, "%s: Suspend fails: %d\n", __func__, r); + else + core->mode = WL1273_MODE_SUSPENDED; + + break; + + default: + dev_err(dev, "%s: Unknown mode: %d\n", __func__, mode); + r = -EINVAL; + break; + } +out: + if (r) + core->mode = old_mode; + + return r; +} + +static int wl1273_fm_set_seek(struct wl1273_device *radio, + unsigned int wrap_around, + unsigned int seek_upward, + int level) +{ + struct wl1273_core *core = radio->core; + int r = 0; + unsigned int dir = (seek_upward == 0) ? 0 : 1; + unsigned int f; + + f = radio->rx_frequency; + dev_dbg(radio->dev, "rx_frequency: %d\n", f); + + if (dir && f + radio->spacing <= radio->rangehigh) + r = wl1273_fm_set_rx_freq(radio, f + radio->spacing); + else if (dir && wrap_around) + r = wl1273_fm_set_rx_freq(radio, radio->rangelow); + else if (f - radio->spacing >= radio->rangelow) + r = wl1273_fm_set_rx_freq(radio, f - radio->spacing); + else if (wrap_around) + r = wl1273_fm_set_rx_freq(radio, radio->rangehigh); + + if (r) + goto out; + + if (level < SCHAR_MIN || level > SCHAR_MAX) + return -EINVAL; + + reinit_completion(&radio->busy); + dev_dbg(radio->dev, "%s: BUSY\n", __func__); + + r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); + if (r) + goto out; + + dev_dbg(radio->dev, "%s\n", __func__); + + r = core->write(core, WL1273_SEARCH_LVL_SET, level); + if (r) + goto out; + + r = core->write(core, WL1273_SEARCH_DIR_SET, dir); + if (r) + goto out; + + r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK); + if (r) + goto out; + + /* wait for the FR IRQ */ + wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)); + if (!(radio->irq_received & WL1273_BL_EVENT)) { + r = -ETIMEDOUT; + goto out; + } + + radio->irq_received &= ~WL1273_BL_EVENT; + + if (!wrap_around) + goto out; + + /* Wrap around */ + dev_dbg(radio->dev, "Wrap around in HW seek.\n"); + + if (seek_upward) + f = radio->rangelow; + else + f = radio->rangehigh; + + r = wl1273_fm_set_rx_freq(radio, f); + if (r) + goto out; + + reinit_completion(&radio->busy); + dev_dbg(radio->dev, "%s: BUSY\n", __func__); + + r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK); + if (r) + goto out; + + /* wait for the FR IRQ */ + if (!wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000))) + r = -ETIMEDOUT; +out: + dev_dbg(radio->dev, "%s: Err: %d\n", __func__, r); + return r; +} + +/** + * wl1273_fm_get_tx_ctune() - Get the TX tuning capacitor value. + * @radio: A pointer to the device struct. + */ +static unsigned int wl1273_fm_get_tx_ctune(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + struct device *dev = radio->dev; + u16 val; + int r; + + if (core->mode == WL1273_MODE_OFF || + core->mode == WL1273_MODE_SUSPENDED) + return -EPERM; + + r = core->read(core, WL1273_READ_FMANT_TUNE_VALUE, &val); + if (r) { + dev_err(dev, "%s: read error: %d\n", __func__, r); + goto out; + } + +out: + return val; +} + +/** + * wl1273_fm_set_preemphasis() - Set the TX pre-emphasis value. + * @radio: A pointer to the device struct. + * @preemphasis: The new pre-amphasis value. + * + * Possible pre-emphasis values are: V4L2_PREEMPHASIS_DISABLED, + * V4L2_PREEMPHASIS_50_uS and V4L2_PREEMPHASIS_75_uS. + */ +static int wl1273_fm_set_preemphasis(struct wl1273_device *radio, + unsigned int preemphasis) +{ + struct wl1273_core *core = radio->core; + int r; + u16 em; + + if (core->mode == WL1273_MODE_OFF || + core->mode == WL1273_MODE_SUSPENDED) + return -EPERM; + + mutex_lock(&core->lock); + + switch (preemphasis) { + case V4L2_PREEMPHASIS_DISABLED: + em = 1; + break; + case V4L2_PREEMPHASIS_50_uS: + em = 0; + break; + case V4L2_PREEMPHASIS_75_uS: + em = 2; + break; + default: + r = -EINVAL; + goto out; + } + + r = core->write(core, WL1273_PREMPH_SET, em); + if (r) + goto out; + + radio->preemphasis = preemphasis; + +out: + mutex_unlock(&core->lock); + return r; +} + +static int wl1273_fm_rds_on(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + int r; + + dev_dbg(radio->dev, "%s\n", __func__); + if (radio->rds_on) + return 0; + + r = core->write(core, WL1273_POWER_SET, + WL1273_POWER_SET_FM | WL1273_POWER_SET_RDS); + if (r) + goto out; + + r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency); + if (r) + dev_err(radio->dev, "set freq fails: %d.\n", r); +out: + return r; +} + +static int wl1273_fm_rds_off(struct wl1273_device *radio) +{ + struct wl1273_core *core = radio->core; + int r; + + if (!radio->rds_on) + return 0; + + radio->irq_flags &= ~WL1273_RDS_EVENT; + + r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); + if (r) + goto out; + + /* Service pending read */ + wake_up_interruptible(&radio->read_queue); + + dev_dbg(radio->dev, "%s\n", __func__); + + r = core->write(core, WL1273_POWER_SET, WL1273_POWER_SET_FM); + if (r) + goto out; + + r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency); + if (r) + dev_err(radio->dev, "set freq fails: %d.\n", r); +out: + dev_dbg(radio->dev, "%s: exiting...\n", __func__); + + return r; +} + +static int wl1273_fm_set_rds(struct wl1273_device *radio, unsigned int new_mode) +{ + int r = 0; + struct wl1273_core *core = radio->core; + + if (core->mode == WL1273_MODE_OFF || + core->mode == WL1273_MODE_SUSPENDED) + return -EPERM; + + if (new_mode == WL1273_RDS_RESET) { + r = core->write(core, WL1273_RDS_CNTRL_SET, 1); + return r; + } + + if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_OFF) { + r = core->write(core, WL1273_RDS_DATA_ENB, 0); + } else if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_ON) { + r = core->write(core, WL1273_RDS_DATA_ENB, 1); + } else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_OFF) { + r = wl1273_fm_rds_off(radio); + } else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_ON) { + r = wl1273_fm_rds_on(radio); + } else { + dev_err(radio->dev, "%s: Unknown mode: %d\n", + __func__, new_mode); + r = -EINVAL; + } + + if (!r) + radio->rds_on = (new_mode == WL1273_RDS_ON) ? true : false; + + return r; +} + +static ssize_t wl1273_fm_fops_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + u16 val; + int r; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (core->mode != WL1273_MODE_TX) + return count; + + if (radio->rds_users == 0) { + dev_warn(radio->dev, "%s: RDS not on.\n", __func__); + return 0; + } + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + /* + * Multiple processes can open the device, but only + * one gets to write to it. + */ + if (radio->owner && radio->owner != file) { + r = -EBUSY; + goto out; + } + radio->owner = file; + + /* Manual Mode */ + if (count > 255) + val = 255; + else + val = count; + + core->write(core, WL1273_RDS_CONFIG_DATA_SET, val); + + if (copy_from_user(radio->write_buf + 1, buf, val)) { + r = -EFAULT; + goto out; + } + + dev_dbg(radio->dev, "Count: %d\n", val); + dev_dbg(radio->dev, "From user: \"%s\"\n", radio->write_buf); + + radio->write_buf[0] = WL1273_RDS_DATA_SET; + core->write_data(core, radio->write_buf, val + 1); + + r = val; +out: + mutex_unlock(&core->lock); + + return r; +} + +static __poll_t wl1273_fm_fops_poll(struct file *file, + struct poll_table_struct *pts) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + + if (radio->owner && radio->owner != file) + return EPOLLERR; + + radio->owner = file; + + if (core->mode == WL1273_MODE_RX) { + poll_wait(file, &radio->read_queue, pts); + + if (radio->rd_index != radio->wr_index) + return EPOLLIN | EPOLLRDNORM; + + } else if (core->mode == WL1273_MODE_TX) { + return EPOLLOUT | EPOLLWRNORM; + } + + return 0; +} + +static int wl1273_fm_fops_open(struct file *file) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r = 0; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (core->mode == WL1273_MODE_RX && radio->rds_on && + !radio->rds_users) { + dev_dbg(radio->dev, "%s: Mode: %d\n", __func__, core->mode); + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + radio->irq_flags |= WL1273_RDS_EVENT; + + r = core->write(core, WL1273_INT_MASK_SET, + radio->irq_flags); + if (r) { + mutex_unlock(&core->lock); + goto out; + } + + radio->rds_users++; + + mutex_unlock(&core->lock); + } +out: + return r; +} + +static int wl1273_fm_fops_release(struct file *file) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r = 0; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (radio->rds_users > 0) { + radio->rds_users--; + if (radio->rds_users == 0) { + mutex_lock(&core->lock); + + radio->irq_flags &= ~WL1273_RDS_EVENT; + + if (core->mode == WL1273_MODE_RX) { + r = core->write(core, + WL1273_INT_MASK_SET, + radio->irq_flags); + if (r) { + mutex_unlock(&core->lock); + goto out; + } + } + mutex_unlock(&core->lock); + } + } + + if (file == radio->owner) + radio->owner = NULL; +out: + return r; +} + +static ssize_t wl1273_fm_fops_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + int r = 0; + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + unsigned int block_count = 0; + u16 val; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (core->mode != WL1273_MODE_RX) + return 0; + + if (radio->rds_users == 0) { + dev_warn(radio->dev, "%s: RDS not on.\n", __func__); + return 0; + } + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + /* + * Multiple processes can open the device, but only + * one at a time gets read access. + */ + if (radio->owner && radio->owner != file) { + r = -EBUSY; + goto out; + } + radio->owner = file; + + r = core->read(core, WL1273_RDS_SYNC_GET, &val); + if (r) { + dev_err(radio->dev, "%s: Get RDS_SYNC fails.\n", __func__); + goto out; + } else if (val == 0) { + dev_info(radio->dev, "RDS_SYNC: Not synchronized\n"); + r = -ENODATA; + goto out; + } + + /* block if no new data available */ + while (radio->wr_index == radio->rd_index) { + if (file->f_flags & O_NONBLOCK) { + r = -EWOULDBLOCK; + goto out; + } + + dev_dbg(radio->dev, "%s: Wait for RDS data.\n", __func__); + if (wait_event_interruptible(radio->read_queue, + radio->wr_index != + radio->rd_index) < 0) { + r = -EINTR; + goto out; + } + } + + /* calculate block count from byte count */ + count /= RDS_BLOCK_SIZE; + + /* copy RDS blocks from the internal buffer and to user buffer */ + while (block_count < count) { + if (radio->rd_index == radio->wr_index) + break; + + /* always transfer complete RDS blocks */ + if (copy_to_user(buf, &radio->buffer[radio->rd_index], + RDS_BLOCK_SIZE)) + break; + + /* increment and wrap the read pointer */ + radio->rd_index += RDS_BLOCK_SIZE; + if (radio->rd_index >= radio->buf_size) + radio->rd_index = 0; + + /* increment counters */ + block_count++; + buf += RDS_BLOCK_SIZE; + r += RDS_BLOCK_SIZE; + } + +out: + dev_dbg(radio->dev, "%s: exit\n", __func__); + mutex_unlock(&core->lock); + + return r; +} + +static const struct v4l2_file_operations wl1273_fops = { + .owner = THIS_MODULE, + .read = wl1273_fm_fops_read, + .write = wl1273_fm_fops_write, + .poll = wl1273_fm_fops_poll, + .unlocked_ioctl = video_ioctl2, + .open = wl1273_fm_fops_open, + .release = wl1273_fm_fops_release, +}; + +static int wl1273_fm_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + + dev_dbg(radio->dev, "%s\n", __func__); + + strscpy(capability->driver, WL1273_FM_DRIVER_NAME, + sizeof(capability->driver)); + strscpy(capability->card, "TI Wl1273 FM Radio", + sizeof(capability->card)); + strscpy(capability->bus_info, radio->bus_type, + sizeof(capability->bus_info)); + return 0; +} + +static int wl1273_fm_vidioc_g_input(struct file *file, void *priv, + unsigned int *i) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + + dev_dbg(radio->dev, "%s\n", __func__); + + *i = 0; + + return 0; +} + +static int wl1273_fm_vidioc_s_input(struct file *file, void *priv, + unsigned int i) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + + dev_dbg(radio->dev, "%s\n", __func__); + + if (i != 0) + return -EINVAL; + + return 0; +} + +/** + * wl1273_fm_set_tx_power() - Set the transmission power value. + * @radio: A pointer to the device struct. + * @power: The new power value. + */ +static int wl1273_fm_set_tx_power(struct wl1273_device *radio, u16 power) +{ + struct wl1273_core *core = radio->core; + int r; + + if (core->mode == WL1273_MODE_OFF || + core->mode == WL1273_MODE_SUSPENDED) + return -EPERM; + + mutex_lock(&core->lock); + + /* Convert the dBuV value to chip presentation */ + r = core->write(core, WL1273_POWER_LEV_SET, 122 - power); + if (r) + goto out; + + radio->tx_power = power; + +out: + mutex_unlock(&core->lock); + return r; +} + +#define WL1273_SPACING_50kHz 1 +#define WL1273_SPACING_100kHz 2 +#define WL1273_SPACING_200kHz 4 + +static int wl1273_fm_tx_set_spacing(struct wl1273_device *radio, + unsigned int spacing) +{ + struct wl1273_core *core = radio->core; + int r; + + if (spacing == 0) { + r = core->write(core, WL1273_SCAN_SPACING_SET, + WL1273_SPACING_100kHz); + radio->spacing = 100; + } else if (spacing - 50000 < 25000) { + r = core->write(core, WL1273_SCAN_SPACING_SET, + WL1273_SPACING_50kHz); + radio->spacing = 50; + } else if (spacing - 100000 < 50000) { + r = core->write(core, WL1273_SCAN_SPACING_SET, + WL1273_SPACING_100kHz); + radio->spacing = 100; + } else { + r = core->write(core, WL1273_SCAN_SPACING_SET, + WL1273_SPACING_200kHz); + radio->spacing = 200; + } + + return r; +} + +static int wl1273_fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl) +{ + struct wl1273_device *radio = ctrl->priv; + struct wl1273_core *core = radio->core; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + switch (ctrl->id) { + case V4L2_CID_TUNE_ANTENNA_CAPACITOR: + ctrl->val = wl1273_fm_get_tx_ctune(radio); + break; + + default: + dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n", + __func__, ctrl->id); + break; + } + + mutex_unlock(&core->lock); + + return 0; +} + +#define WL1273_MUTE_SOFT_ENABLE (1 << 0) +#define WL1273_MUTE_AC (1 << 1) +#define WL1273_MUTE_HARD_LEFT (1 << 2) +#define WL1273_MUTE_HARD_RIGHT (1 << 3) +#define WL1273_MUTE_SOFT_FORCE (1 << 4) + +static inline struct wl1273_device *to_radio(struct v4l2_ctrl *ctrl) +{ + return container_of(ctrl->handler, struct wl1273_device, ctrl_handler); +} + +static int wl1273_fm_vidioc_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct wl1273_device *radio = to_radio(ctrl); + struct wl1273_core *core = radio->core; + int r = 0; + + dev_dbg(radio->dev, "%s\n", __func__); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + if (core->mode == WL1273_MODE_RX && ctrl->val) + r = core->write(core, + WL1273_MUTE_STATUS_SET, + WL1273_MUTE_HARD_LEFT | + WL1273_MUTE_HARD_RIGHT); + else if (core->mode == WL1273_MODE_RX) + r = core->write(core, + WL1273_MUTE_STATUS_SET, 0x0); + else if (core->mode == WL1273_MODE_TX && ctrl->val) + r = core->write(core, WL1273_MUTE, 1); + else if (core->mode == WL1273_MODE_TX) + r = core->write(core, WL1273_MUTE, 0); + + mutex_unlock(&core->lock); + break; + + case V4L2_CID_AUDIO_VOLUME: + if (ctrl->val == 0) + r = wl1273_fm_set_mode(radio, WL1273_MODE_OFF); + else + r = core->set_volume(core, core->volume); + break; + + case V4L2_CID_TUNE_PREEMPHASIS: + r = wl1273_fm_set_preemphasis(radio, ctrl->val); + break; + + case V4L2_CID_TUNE_POWER_LEVEL: + r = wl1273_fm_set_tx_power(radio, ctrl->val); + break; + + default: + dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n", + __func__, ctrl->id); + break; + } + + dev_dbg(radio->dev, "%s\n", __func__); + return r; +} + +static int wl1273_fm_vidioc_g_audio(struct file *file, void *priv, + struct v4l2_audio *audio) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + + dev_dbg(radio->dev, "%s\n", __func__); + + if (audio->index > 1) + return -EINVAL; + + strscpy(audio->name, "Radio", sizeof(audio->name)); + audio->capability = V4L2_AUDCAP_STEREO; + + return 0; +} + +static int wl1273_fm_vidioc_s_audio(struct file *file, void *priv, + const struct v4l2_audio *audio) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + + dev_dbg(radio->dev, "%s\n", __func__); + + if (audio->index != 0) + return -EINVAL; + + return 0; +} + +#define WL1273_RDS_NOT_SYNCHRONIZED 0 +#define WL1273_RDS_SYNCHRONIZED 1 + +static int wl1273_fm_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *tuner) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + u16 val; + int r; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (tuner->index > 0) + return -EINVAL; + + strscpy(tuner->name, WL1273_FM_DRIVER_NAME, sizeof(tuner->name)); + tuner->type = V4L2_TUNER_RADIO; + + tuner->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW); + tuner->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH); + + tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS | + V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | V4L2_TUNER_CAP_HWSEEK_WRAP; + + if (radio->stereo) + tuner->audmode = V4L2_TUNER_MODE_STEREO; + else + tuner->audmode = V4L2_TUNER_MODE_MONO; + + if (core->mode != WL1273_MODE_RX) + return 0; + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + r = core->read(core, WL1273_STEREO_GET, &val); + if (r) + goto out; + + if (val == 1) + tuner->rxsubchans = V4L2_TUNER_SUB_STEREO; + else + tuner->rxsubchans = V4L2_TUNER_SUB_MONO; + + r = core->read(core, WL1273_RSSI_LVL_GET, &val); + if (r) + goto out; + + tuner->signal = (s16) val; + dev_dbg(radio->dev, "Signal: %d\n", tuner->signal); + + tuner->afc = 0; + + r = core->read(core, WL1273_RDS_SYNC_GET, &val); + if (r) + goto out; + + if (val == WL1273_RDS_SYNCHRONIZED) + tuner->rxsubchans |= V4L2_TUNER_SUB_RDS; +out: + mutex_unlock(&core->lock); + + return r; +} + +static int wl1273_fm_vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *tuner) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r = 0; + + dev_dbg(radio->dev, "%s\n", __func__); + dev_dbg(radio->dev, "tuner->index: %d\n", tuner->index); + dev_dbg(radio->dev, "tuner->name: %s\n", tuner->name); + dev_dbg(radio->dev, "tuner->capability: 0x%04x\n", tuner->capability); + dev_dbg(radio->dev, "tuner->rxsubchans: 0x%04x\n", tuner->rxsubchans); + dev_dbg(radio->dev, "tuner->rangelow: %d\n", tuner->rangelow); + dev_dbg(radio->dev, "tuner->rangehigh: %d\n", tuner->rangehigh); + + if (tuner->index > 0) + return -EINVAL; + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + r = wl1273_fm_set_mode(radio, WL1273_MODE_RX); + if (r) + goto out; + + if (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) + r = wl1273_fm_set_rds(radio, WL1273_RDS_ON); + else + r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF); + + if (r) + dev_warn(radio->dev, "%s: RDS fails: %d\n", __func__, r); + + if (tuner->audmode == V4L2_TUNER_MODE_MONO) { + r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO); + if (r < 0) { + dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n", + __func__, r); + goto out; + } + radio->stereo = false; + } else if (tuner->audmode == V4L2_TUNER_MODE_STEREO) { + r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO); + if (r < 0) { + dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n", + __func__, r); + goto out; + } + radio->stereo = true; + } else { + dev_err(radio->dev, "%s: tuner->audmode: %d\n", + __func__, tuner->audmode); + r = -EINVAL; + goto out; + } + +out: + mutex_unlock(&core->lock); + + return r; +} + +static int wl1273_fm_vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *freq) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + freq->type = V4L2_TUNER_RADIO; + freq->frequency = WL1273_FREQ(wl1273_fm_get_freq(radio)); + + mutex_unlock(&core->lock); + + return 0; +} + +static int wl1273_fm_vidioc_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *freq) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r; + + dev_dbg(radio->dev, "%s: %d\n", __func__, freq->frequency); + + if (freq->type != V4L2_TUNER_RADIO) { + dev_dbg(radio->dev, + "freq->type != V4L2_TUNER_RADIO: %d\n", freq->type); + return -EINVAL; + } + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + if (core->mode == WL1273_MODE_RX) { + dev_dbg(radio->dev, "freq: %d\n", freq->frequency); + + r = wl1273_fm_set_rx_freq(radio, + WL1273_INV_FREQ(freq->frequency)); + if (r) + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME + ": set frequency failed with %d\n", r); + } else { + r = wl1273_fm_set_tx_freq(radio, + WL1273_INV_FREQ(freq->frequency)); + if (r) + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME + ": set frequency failed with %d\n", r); + } + + mutex_unlock(&core->lock); + + dev_dbg(radio->dev, "wl1273_vidioc_s_frequency: DONE\n"); + return r; +} + +#define WL1273_DEFAULT_SEEK_LEVEL 7 + +static int wl1273_fm_vidioc_s_hw_freq_seek(struct file *file, void *priv, + const struct v4l2_hw_freq_seek *seek) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO) + return -EINVAL; + + if (file->f_flags & O_NONBLOCK) + return -EWOULDBLOCK; + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + r = wl1273_fm_set_mode(radio, WL1273_MODE_RX); + if (r) + goto out; + + r = wl1273_fm_tx_set_spacing(radio, seek->spacing); + if (r) + dev_warn(radio->dev, "HW seek failed: %d\n", r); + + r = wl1273_fm_set_seek(radio, seek->wrap_around, seek->seek_upward, + WL1273_DEFAULT_SEEK_LEVEL); + if (r) + dev_warn(radio->dev, "HW seek failed: %d\n", r); + +out: + mutex_unlock(&core->lock); + return r; +} + +static int wl1273_fm_vidioc_s_modulator(struct file *file, void *priv, + const struct v4l2_modulator *modulator) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + int r = 0; + + dev_dbg(radio->dev, "%s\n", __func__); + + if (modulator->index > 0) + return -EINVAL; + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + r = wl1273_fm_set_mode(radio, WL1273_MODE_TX); + if (r) + goto out; + + if (modulator->txsubchans & V4L2_TUNER_SUB_RDS) + r = wl1273_fm_set_rds(radio, WL1273_RDS_ON); + else + r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF); + + if (modulator->txsubchans & V4L2_TUNER_SUB_MONO) + r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO); + else + r = core->write(core, WL1273_MONO_SET, + WL1273_RX_STEREO); + if (r < 0) + dev_warn(radio->dev, WL1273_FM_DRIVER_NAME + "MONO_SET fails: %d\n", r); +out: + mutex_unlock(&core->lock); + + return r; +} + +static int wl1273_fm_vidioc_g_modulator(struct file *file, void *priv, + struct v4l2_modulator *modulator) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + u16 val; + int r; + + dev_dbg(radio->dev, "%s\n", __func__); + + strscpy(modulator->name, WL1273_FM_DRIVER_NAME, + sizeof(modulator->name)); + + modulator->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW); + modulator->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH); + + modulator->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS | + V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO; + + if (core->mode != WL1273_MODE_TX) + return 0; + + if (mutex_lock_interruptible(&core->lock)) + return -EINTR; + + r = core->read(core, WL1273_MONO_SET, &val); + if (r) + goto out; + + if (val == WL1273_TX_STEREO) + modulator->txsubchans = V4L2_TUNER_SUB_STEREO; + else + modulator->txsubchans = V4L2_TUNER_SUB_MONO; + + if (radio->rds_on) + modulator->txsubchans |= V4L2_TUNER_SUB_RDS; +out: + mutex_unlock(&core->lock); + + return 0; +} + +static int wl1273_fm_vidioc_log_status(struct file *file, void *priv) +{ + struct wl1273_device *radio = video_get_drvdata(video_devdata(file)); + struct wl1273_core *core = radio->core; + struct device *dev = radio->dev; + u16 val; + int r; + + dev_info(dev, DRIVER_DESC); + + if (core->mode == WL1273_MODE_OFF) { + dev_info(dev, "Mode: Off\n"); + return 0; + } + + if (core->mode == WL1273_MODE_SUSPENDED) { + dev_info(dev, "Mode: Suspended\n"); + return 0; + } + + r = core->read(core, WL1273_ASIC_ID_GET, &val); + if (r) + dev_err(dev, "%s: Get ASIC_ID fails.\n", __func__); + else + dev_info(dev, "ASIC_ID: 0x%04x\n", val); + + r = core->read(core, WL1273_ASIC_VER_GET, &val); + if (r) + dev_err(dev, "%s: Get ASIC_VER fails.\n", __func__); + else + dev_info(dev, "ASIC Version: 0x%04x\n", val); + + r = core->read(core, WL1273_FIRM_VER_GET, &val); + if (r) + dev_err(dev, "%s: Get FIRM_VER fails.\n", __func__); + else + dev_info(dev, "FW version: %d(0x%04x)\n", val, val); + + r = core->read(core, WL1273_BAND_SET, &val); + if (r) + dev_err(dev, "%s: Get BAND fails.\n", __func__); + else + dev_info(dev, "BAND: %d\n", val); + + if (core->mode == WL1273_MODE_TX) { + r = core->read(core, WL1273_PUPD_SET, &val); + if (r) + dev_err(dev, "%s: Get PUPD fails.\n", __func__); + else + dev_info(dev, "PUPD: 0x%04x\n", val); + + r = core->read(core, WL1273_CHANL_SET, &val); + if (r) + dev_err(dev, "%s: Get CHANL fails.\n", __func__); + else + dev_info(dev, "Tx frequency: %dkHz\n", val*10); + } else if (core->mode == WL1273_MODE_RX) { + int bf = radio->rangelow; + + r = core->read(core, WL1273_FREQ_SET, &val); + if (r) + dev_err(dev, "%s: Get FREQ fails.\n", __func__); + else + dev_info(dev, "RX Frequency: %dkHz\n", bf + val*50); + + r = core->read(core, WL1273_MOST_MODE_SET, &val); + if (r) + dev_err(dev, "%s: Get MOST_MODE fails.\n", + __func__); + else if (val == 0) + dev_info(dev, "MOST_MODE: Stereo according to blend\n"); + else if (val == 1) + dev_info(dev, "MOST_MODE: Force mono output\n"); + else + dev_info(dev, "MOST_MODE: Unexpected value: %d\n", val); + + r = core->read(core, WL1273_MOST_BLEND_SET, &val); + if (r) + dev_err(dev, "%s: Get MOST_BLEND fails.\n", __func__); + else if (val == 0) + dev_info(dev, + "MOST_BLEND: Switched blend & hysteresis.\n"); + else if (val == 1) + dev_info(dev, "MOST_BLEND: Soft blend.\n"); + else + dev_info(dev, "MOST_BLEND: Unexpected val: %d\n", val); + + r = core->read(core, WL1273_STEREO_GET, &val); + if (r) + dev_err(dev, "%s: Get STEREO fails.\n", __func__); + else if (val == 0) + dev_info(dev, "STEREO: Not detected\n"); + else if (val == 1) + dev_info(dev, "STEREO: Detected\n"); + else + dev_info(dev, "STEREO: Unexpected value: %d\n", val); + + r = core->read(core, WL1273_RSSI_LVL_GET, &val); + if (r) + dev_err(dev, "%s: Get RSSI_LVL fails.\n", __func__); + else + dev_info(dev, "RX signal strength: %d\n", (s16) val); + + r = core->read(core, WL1273_POWER_SET, &val); + if (r) + dev_err(dev, "%s: Get POWER fails.\n", __func__); + else + dev_info(dev, "POWER: 0x%04x\n", val); + + r = core->read(core, WL1273_INT_MASK_SET, &val); + if (r) + dev_err(dev, "%s: Get INT_MASK fails.\n", __func__); + else + dev_info(dev, "INT_MASK: 0x%04x\n", val); + + r = core->read(core, WL1273_RDS_SYNC_GET, &val); + if (r) + dev_err(dev, "%s: Get RDS_SYNC fails.\n", + __func__); + else if (val == 0) + dev_info(dev, "RDS_SYNC: Not synchronized\n"); + + else if (val == 1) + dev_info(dev, "RDS_SYNC: Synchronized\n"); + else + dev_info(dev, "RDS_SYNC: Unexpected value: %d\n", val); + + r = core->read(core, WL1273_I2S_MODE_CONFIG_SET, &val); + if (r) + dev_err(dev, "%s: Get I2S_MODE_CONFIG fails.\n", + __func__); + else + dev_info(dev, "I2S_MODE_CONFIG: 0x%04x\n", val); + + r = core->read(core, WL1273_VOLUME_SET, &val); + if (r) + dev_err(dev, "%s: Get VOLUME fails.\n", __func__); + else + dev_info(dev, "VOLUME: 0x%04x\n", val); + } + + return 0; +} + +static void wl1273_vdev_release(struct video_device *dev) +{ +} + +static const struct v4l2_ctrl_ops wl1273_ctrl_ops = { + .s_ctrl = wl1273_fm_vidioc_s_ctrl, + .g_volatile_ctrl = wl1273_fm_g_volatile_ctrl, +}; + +static const struct v4l2_ioctl_ops wl1273_ioctl_ops = { + .vidioc_querycap = wl1273_fm_vidioc_querycap, + .vidioc_g_input = wl1273_fm_vidioc_g_input, + .vidioc_s_input = wl1273_fm_vidioc_s_input, + .vidioc_g_audio = wl1273_fm_vidioc_g_audio, + .vidioc_s_audio = wl1273_fm_vidioc_s_audio, + .vidioc_g_tuner = wl1273_fm_vidioc_g_tuner, + .vidioc_s_tuner = wl1273_fm_vidioc_s_tuner, + .vidioc_g_frequency = wl1273_fm_vidioc_g_frequency, + .vidioc_s_frequency = wl1273_fm_vidioc_s_frequency, + .vidioc_s_hw_freq_seek = wl1273_fm_vidioc_s_hw_freq_seek, + .vidioc_g_modulator = wl1273_fm_vidioc_g_modulator, + .vidioc_s_modulator = wl1273_fm_vidioc_s_modulator, + .vidioc_log_status = wl1273_fm_vidioc_log_status, +}; + +static const struct video_device wl1273_viddev_template = { + .fops = &wl1273_fops, + .ioctl_ops = &wl1273_ioctl_ops, + .name = WL1273_FM_DRIVER_NAME, + .release = wl1273_vdev_release, + .vfl_dir = VFL_DIR_TX, + .device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER | + V4L2_CAP_RADIO | V4L2_CAP_AUDIO | + V4L2_CAP_RDS_CAPTURE | V4L2_CAP_MODULATOR | + V4L2_CAP_RDS_OUTPUT, +}; + +static int wl1273_fm_radio_remove(struct platform_device *pdev) +{ + struct wl1273_device *radio = platform_get_drvdata(pdev); + struct wl1273_core *core = radio->core; + + dev_info(&pdev->dev, "%s.\n", __func__); + + free_irq(core->client->irq, radio); + core->pdata->free_resources(); + + v4l2_ctrl_handler_free(&radio->ctrl_handler); + video_unregister_device(&radio->videodev); + v4l2_device_unregister(&radio->v4l2dev); + + return 0; +} + +static int wl1273_fm_radio_probe(struct platform_device *pdev) +{ + struct wl1273_core **core = pdev->dev.platform_data; + struct wl1273_device *radio; + struct v4l2_ctrl *ctrl; + int r = 0; + + pr_debug("%s\n", __func__); + + if (!core) { + dev_err(&pdev->dev, "No platform data.\n"); + r = -EINVAL; + goto pdata_err; + } + + radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL); + if (!radio) { + r = -ENOMEM; + goto pdata_err; + } + + /* RDS buffer allocation */ + radio->buf_size = rds_buf * RDS_BLOCK_SIZE; + radio->buffer = devm_kzalloc(&pdev->dev, radio->buf_size, GFP_KERNEL); + if (!radio->buffer) { + pr_err("Cannot allocate memory for RDS buffer.\n"); + r = -ENOMEM; + goto pdata_err; + } + + radio->core = *core; + radio->irq_flags = WL1273_IRQ_MASK; + radio->dev = &radio->core->client->dev; + radio->rds_on = false; + radio->core->mode = WL1273_MODE_OFF; + radio->tx_power = 118; + radio->core->audio_mode = WL1273_AUDIO_ANALOG; + radio->band = WL1273_BAND_OTHER; + radio->core->i2s_mode = WL1273_I2S_DEF_MODE; + radio->core->channel_number = 2; + radio->core->volume = WL1273_DEFAULT_VOLUME; + radio->rx_frequency = WL1273_BAND_OTHER_LOW; + radio->tx_frequency = WL1273_BAND_OTHER_HIGH; + radio->rangelow = WL1273_BAND_OTHER_LOW; + radio->rangehigh = WL1273_BAND_OTHER_HIGH; + radio->stereo = true; + radio->bus_type = "I2C"; + + if (radio->core->pdata->request_resources) { + r = radio->core->pdata->request_resources(radio->core->client); + if (r) { + dev_err(radio->dev, WL1273_FM_DRIVER_NAME + ": Cannot get platform data\n"); + goto pdata_err; + } + + dev_dbg(radio->dev, "irq: %d\n", radio->core->client->irq); + + r = request_threaded_irq(radio->core->client->irq, NULL, + wl1273_fm_irq_thread_handler, + IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + "wl1273-fm", radio); + if (r < 0) { + dev_err(radio->dev, WL1273_FM_DRIVER_NAME + ": Unable to register IRQ handler: %d\n", r); + goto err_request_irq; + } + } else { + dev_err(radio->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ not configured"); + r = -EINVAL; + goto pdata_err; + } + + init_completion(&radio->busy); + init_waitqueue_head(&radio->read_queue); + + radio->write_buf = devm_kzalloc(&pdev->dev, 256, GFP_KERNEL); + if (!radio->write_buf) { + r = -ENOMEM; + goto write_buf_err; + } + + radio->dev = &pdev->dev; + radio->v4l2dev.ctrl_handler = &radio->ctrl_handler; + radio->rds_users = 0; + + r = v4l2_device_register(&pdev->dev, &radio->v4l2dev); + if (r) { + dev_err(&pdev->dev, "Cannot register v4l2_device.\n"); + goto write_buf_err; + } + + /* V4L2 configuration */ + radio->videodev = wl1273_viddev_template; + + radio->videodev.v4l2_dev = &radio->v4l2dev; + + v4l2_ctrl_handler_init(&radio->ctrl_handler, 6); + + /* add in ascending ID order */ + v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops, + V4L2_CID_AUDIO_VOLUME, 0, WL1273_MAX_VOLUME, 1, + WL1273_DEFAULT_VOLUME); + + v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops, + V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); + + v4l2_ctrl_new_std_menu(&radio->ctrl_handler, &wl1273_ctrl_ops, + V4L2_CID_TUNE_PREEMPHASIS, + V4L2_PREEMPHASIS_75_uS, 0x03, + V4L2_PREEMPHASIS_50_uS); + + v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops, + V4L2_CID_TUNE_POWER_LEVEL, 91, 122, 1, 118); + + ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops, + V4L2_CID_TUNE_ANTENNA_CAPACITOR, + 0, 255, 1, 255); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; + + if (radio->ctrl_handler.error) { + r = radio->ctrl_handler.error; + dev_err(&pdev->dev, "Ctrl handler error: %d\n", r); + goto handler_init_err; + } + + video_set_drvdata(&radio->videodev, radio); + platform_set_drvdata(pdev, radio); + + /* register video device */ + r = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr); + if (r) { + dev_err(&pdev->dev, WL1273_FM_DRIVER_NAME + ": Could not register video device\n"); + goto handler_init_err; + } + + return 0; + +handler_init_err: + v4l2_ctrl_handler_free(&radio->ctrl_handler); + v4l2_device_unregister(&radio->v4l2dev); +write_buf_err: + free_irq(radio->core->client->irq, radio); +err_request_irq: + radio->core->pdata->free_resources(); +pdata_err: + return r; +} + +static struct platform_driver wl1273_fm_radio_driver = { + .probe = wl1273_fm_radio_probe, + .remove = wl1273_fm_radio_remove, + .driver = { + .name = "wl1273_fm_radio", + }, +}; + +module_platform_driver(wl1273_fm_radio_driver); + +MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:wl1273_fm_radio"); |