[PATCH v7 2/5] MFD: WL1273 FM Radio: MFD driver for the FM radio.

["Matti J. Aaltonen" <matti.j.aaltonen@nokia.com>]

This is a parent for two child drivers: a V4L2 driver and
an ALSA codec driver. The MFD part implements I2C communication
to the device and provides a couple of functions that are called
from both children.

Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
---
 drivers/mfd/wl1273-core.c       |  612 +++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/wl1273-core.h |  314 ++++++++++++++++++++
 2 files changed, 926 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mfd/wl1273-core.c
 create mode 100644 include/linux/mfd/wl1273-core.h

diff --git a/drivers/mfd/wl1273-core.c b/drivers/mfd/wl1273-core.c
new file mode 100644
index 0000000..603b922
--- /dev/null
+++ b/drivers/mfd/wl1273-core.c
@@ -0,0 +1,612 @@
+/*
+ * MFD driver for wl1273 FM radio and audio codec submodules.
+ *
+ * Author:	Matti Aaltonen <matti.j.aaltonen@nokia.com>
+ *
+ * Copyright:   (C) 2010 Nokia Corporation
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/wl1273-core.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+
+#define DRIVER_DESC "WL1273 FM Radio Core"
+
+#define WL1273_IRQ_MASK	 (WL1273_FR_EVENT		|	\
+			  WL1273_POW_ENB_EVENT)
+
+static const struct band_info bands[] = {
+	/* USA & Europe */
+	{
+		.bottom_frequency	= 87500,
+		.top_frequency		= 108000,
+		.band			= V4L2_FM_BAND_OTHER,
+	},
+	/* Japan */
+	{
+		.bottom_frequency	= 76000,
+		.top_frequency		= 90000,
+		.band			= V4L2_FM_BAND_JAPAN,
+	},
+};
+
+/*
+ * static unsigned char radio_band - Band
+ *
+ * The bands are 0 == USA-Europe, 1 == Japan. USA-Europe is the default.
+ */
+static unsigned char radio_band;
+module_param(radio_band, byte, 0);
+MODULE_PARM_DESC(radio_band, "Band: 0=USA-Europe, 1=Japan");
+
+/*
+ * 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, "RDS buffer entries: *100*");
+
+int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value)
+{
+	struct i2c_client *client = core->i2c_dev;
+	u8 b[2];
+	int r;
+
+	r = i2c_smbus_read_i2c_block_data(client, reg, 2, b);
+	if (r != 2) {
+		dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
+		return -EREMOTEIO;
+	}
+
+	*value = (u16)b[0] << 8 | b[1];
+
+	return 0;
+}
+EXPORT_SYMBOL(wl1273_fm_read_reg);
+
+int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
+{
+	struct i2c_client *client = core->i2c_dev;
+	u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
+	int r;
+
+	r = i2c_smbus_write_i2c_block_data(client, cmd, 2, buf);
+	if (r) {
+		dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
+		return r;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(wl1273_fm_write_cmd);
+
+int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len)
+{
+	struct i2c_client *client = core->i2c_dev;
+	struct i2c_msg msg[1];
+	int r;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = 0;
+	msg[0].buf = data;
+	msg[0].len = len;
+
+	r = i2c_transfer(client->adapter, msg, 1);
+
+	if (r != 1) {
+		dev_err(&client->dev, "%s: write error.\n", __func__);
+		return -EREMOTEIO;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(wl1273_fm_write_data);
+
+/**
+ * wl1273_fm_set_audio() -	Set audio mode.
+ * @core:			A pointer to the device struct.
+ * @new_mode:			The new audio mode.
+ *
+ * Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
+ */
+int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
+{
+	int r = 0;
+
+	if (core->mode == WL1273_MODE_OFF ||
+	    core->mode == WL1273_MODE_SUSPENDED)
+		return -EPERM;
+
+	if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
+		r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
+					WL1273_PCM_DEF_MODE);
+		if (r)
+			goto out;
+
+		r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
+					core->i2s_mode);
+		if (r)
+			goto out;
+
+		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
+					WL1273_AUDIO_ENABLE_I2S);
+		if (r)
+			goto out;
+
+	} else if (core->mode == WL1273_MODE_RX &&
+		   new_mode == WL1273_AUDIO_ANALOG) {
+		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
+					WL1273_AUDIO_ENABLE_ANALOG);
+		if (r)
+			goto out;
+
+	} else if (core->mode == WL1273_MODE_TX &&
+		   new_mode == WL1273_AUDIO_DIGITAL) {
+		r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
+					core->i2s_mode);
+		if (r)
+			goto out;
+
+		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
+					WL1273_AUDIO_IO_SET_I2S);
+		if (r)
+			goto out;
+
+	} else if (core->mode == WL1273_MODE_TX &&
+		   new_mode == WL1273_AUDIO_ANALOG) {
+		r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
+					WL1273_AUDIO_IO_SET_ANALOG);
+		if (r)
+			goto out;
+	}
+
+	core->audio_mode = new_mode;
+
+out:
+	return r;
+}
+EXPORT_SYMBOL(wl1273_fm_set_audio);
+
+/**
+ * wl1273_fm_set_volume() -	Set volume.
+ * @core:			A pointer to the device struct.
+ * @volume:			The new volume value.
+ */
+int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
+{
+	u16 val;
+	int r;
+
+	if (volume > WL1273_MAX_VOLUME)
+		return -EINVAL;
+
+	if (core->volume == volume)
+		return 0;
+
+	val = volume;
+	r = wl1273_fm_read_reg(core, WL1273_VOLUME_SET, &val);
+	if (r)
+		return r;
+
+	core->volume = volume;
+	return 0;
+}
+EXPORT_SYMBOL(wl1273_fm_set_volume);
+
+#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_core *core)
+{
+	struct i2c_client *client = core->i2c_dev;
+	struct device *dev = &client->dev;
+	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 = sizeof(b0)
+		},
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.buf = (u8 *) &rds,
+			.len = sizeof(rds),
+		}
+	};
+	int r;
+
+	if (core->mode != WL1273_MODE_RX)
+		return 0;
+
+	r = wl1273_fm_read_reg(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, 2);
+		if (r != 2) {
+			dev_err(dev, WL1273_FM_DRIVER_NAME
+				": %s: read_rds error r == %i)\n",
+				__func__, r);
+		}
+
+		status = rds.block;
+
+		if (!WL1273_FIFO_HAS_DATA(status))
+			break;
+
+		/* fill bits 0-5 */
+		rds.block = 0x07 & 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(&core->buffer[core->wr_index], &rds, 3);
+		core->wr_index += 3;
+
+		/* wrap write pointer */
+		if (core->wr_index >= core->buf_size)
+			core->wr_index = 0;
+
+		/* check for overflow & start over */
+		if (core->wr_index == core->rd_index) {
+			dev_dbg(dev, "RDS OVERFLOW");
+
+			core->rd_index = 0;
+			core->wr_index = 0;
+			break;
+		}
+	} while (WL1273_FIFO_HAS_DATA(status));
+
+	/* wake up read queue */
+	if (core->wr_index != core->rd_index)
+		wake_up_interruptible(&core->read_queue);
+
+	return 0;
+}
+
+static void wl1273_fm_rds_work(struct wl1273_core *core)
+{
+	wl1273_fm_rds(core);
+}
+
+static irqreturn_t wl1273_fm_irq_thread_handler(int irq, void *dev_id)
+{
+	int r;
+	u16 flags;
+	struct wl1273_core *core = dev_id;
+
+	r = wl1273_fm_read_reg(core, WL1273_FLAG_GET, &flags);
+	if (r)
+		goto out;
+
+	if (flags & WL1273_BL_EVENT) {
+		core->irq_received = flags;
+		dev_dbg(&core->i2c_dev->dev, "IRQ: BL\n");
+	}
+
+	if (flags & WL1273_RDS_EVENT) {
+		msleep(200);
+
+		wl1273_fm_rds_work(core);
+	}
+
+	if (flags & WL1273_BBLK_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: BBLK\n");
+
+	if (flags & WL1273_LSYNC_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: LSYNC\n");
+
+	if (flags & WL1273_LEV_EVENT) {
+		u16 level;
+
+		r = wl1273_fm_read_reg(core, WL1273_RSSI_LVL_GET, &level);
+
+		if (r)
+			goto out;
+
+		if (level > 14)
+			dev_dbg(&core->i2c_dev->dev, "IRQ: LEV: 0x%x04\n",
+				level);
+	}
+
+	if (flags & WL1273_IFFR_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: IFFR\n");
+
+	if (flags & WL1273_PI_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: PI\n");
+
+	if (flags & WL1273_PD_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: PD\n");
+
+	if (flags & WL1273_STIC_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: STIC\n");
+
+	if (flags & WL1273_MAL_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: MAL\n");
+
+	if (flags & WL1273_POW_ENB_EVENT) {
+		complete(&core->busy);
+		dev_dbg(&core->i2c_dev->dev, "NOT BUSY\n");
+		dev_dbg(&core->i2c_dev->dev, "IRQ: POW_ENB\n");
+	}
+
+	if (flags & WL1273_SCAN_OVER_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: SCAN_OVER\n");
+
+	if (flags & WL1273_ERROR_EVENT)
+		dev_dbg(&core->i2c_dev->dev, "IRQ: ERROR\n");
+
+	if (flags & WL1273_FR_EVENT) {
+		u16 freq;
+
+		dev_dbg(&core->i2c_dev->dev, "IRQ: FR:\n");
+
+		if (core->mode == WL1273_MODE_RX) {
+			r = wl1273_fm_write_cmd(core, WL1273_TUNER_MODE_SET,
+						TUNER_MODE_STOP_SEARCH);
+			if (r) {
+				dev_err(&core->i2c_dev->dev,
+					"%s: TUNER_MODE_SET fails: %d\n",
+					__func__, r);
+				goto out;
+			}
+
+			r = wl1273_fm_read_reg(core, WL1273_FREQ_SET, &freq);
+			if (r)
+				goto out;
+
+			core->rx_frequency =
+				bands[core->band].bottom_frequency +
+				freq * 50;
+
+			/*
+			 *  The driver works better with this msleep,
+			 *  the documentation doesn't mention it.
+			 */
+			msleep(10);
+
+			dev_dbg(&core->i2c_dev->dev, "%dkHz\n",
+				core->rx_frequency);
+
+		} else {
+			r = wl1273_fm_read_reg(core, WL1273_CHANL_SET, &freq);
+			if (r)
+				goto out;
+
+			dev_dbg(&core->i2c_dev->dev, "%dkHz\n", freq);
+		}
+		dev_dbg(&core->i2c_dev->dev, "%s: NOT BUSY\n", __func__);
+	}
+
+out:
+	wl1273_fm_write_cmd(core, WL1273_INT_MASK_SET,
+			    core->irq_flags);
+	complete(&core->busy);
+
+	return IRQ_HANDLED;
+}
+
+static struct i2c_device_id wl1273_driver_id_table[] = {
+	{ WL1273_FM_DRIVER_NAME, 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
+
+static int wl1273_core_remove(struct i2c_client *client)
+{
+	struct wl1273_core *core = i2c_get_clientdata(client);
+	struct wl1273_fm_platform_data *pdata =
+		client->dev.platform_data;
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	mfd_remove_devices(&client->dev);
+	i2c_set_clientdata(client, core);
+
+	free_irq(client->irq, core);
+	pdata->free_resources();
+
+	kfree(core->buffer);
+	kfree(core);
+
+	return 0;
+}
+
+static int __devinit wl1273_core_probe(struct i2c_client *client,
+				       const struct i2c_device_id *id)
+{
+	struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
+	int r = 0;
+	struct wl1273_core *core;
+	int children = 0;
+
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	if (!pdata) {
+		dev_err(&client->dev, "No platform data.\n");
+		return -EINVAL;
+	}
+
+	core = kzalloc(sizeof(*core), GFP_KERNEL);
+	if (!core)
+		return -ENOMEM;
+
+	/* RDS buffer allocation */
+	core->buf_size = rds_buf * 3;
+	core->buffer = kmalloc(core->buf_size, GFP_KERNEL);
+	if (!core->buffer) {
+		dev_err(&client->dev,
+			"Cannot allocate memory for RDS buffer.\n");
+		r = -ENOMEM;
+		goto err_kmalloc;
+	}
+
+	core->irq_flags = WL1273_IRQ_MASK;
+	core->i2c_dev = client;
+	core->rds_on = false;
+	core->mode = WL1273_MODE_OFF;
+	core->tx_power = 4;
+	core->audio_mode = WL1273_AUDIO_ANALOG;
+	core->band = radio_band;
+	core->bands = bands;
+	core->number_of_bands = ARRAY_SIZE(bands);
+	core->i2s_mode = WL1273_I2S_DEF_MODE;
+	core->channel_number = 2;
+	core->volume = WL1273_DEFAULT_VOLUME;
+	core->rx_frequency = bands[core->band].bottom_frequency;
+	core->tx_frequency = bands[core->band].top_frequency;
+	core->stereo = true;
+
+	dev_dbg(&client->dev, "radio_band: %d\n", radio_band);
+
+	mutex_init(&core->lock);
+
+	pdata = client->dev.platform_data;
+	if (pdata) {
+		r = pdata->request_resources(client);
+		if (r) {
+			dev_err(&client->dev, WL1273_FM_DRIVER_NAME
+				": Cannot get platform data\n");
+			goto err_new_mixer;
+		}
+
+		r = request_threaded_irq(client->irq, NULL,
+					 wl1273_fm_irq_thread_handler,
+					 IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
+					 "wl1273-fm", core);
+		if (r < 0) {
+			dev_err(&client->dev, WL1273_FM_DRIVER_NAME
+				": Unable to register IRQ handler\n");
+			goto err_request_irq;
+		}
+	} else {
+		dev_err(&client->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ"
+			" not configured");
+		r = -EINVAL;
+		goto err_new_mixer;
+	}
+
+	init_completion(&core->busy);
+	init_waitqueue_head(&core->read_queue);
+
+	i2c_set_clientdata(client, core);
+
+	if (pdata->children & WL1273_RADIO_CHILD) {
+		struct mfd_cell *cell = &core->cells[children];
+		dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
+		cell->name = "wl1273_fm_radio";
+		cell->platform_data = &core;
+		cell->data_size = sizeof(core);
+		children++;
+	}
+
+	if (pdata->children & WL1273_CODEC_CHILD) {
+		struct mfd_cell *cell = &core->cells[children];
+		dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
+		cell->name = "wl1273_codec_audio";
+		cell->platform_data = &core;
+		cell->data_size = sizeof(core);
+		children++;
+	}
+
+	if (children) {
+		dev_dbg(&client->dev, "%s: Have children.\n", __func__);
+		r = mfd_add_devices(&client->dev, -1, core->cells,
+				    children, NULL, 0);
+	} else {
+		dev_err(&client->dev, "No platform data found for children.\n");
+		r = -ENODEV;
+	}
+
+	if (!r)
+		return 0;
+
+	i2c_set_clientdata(client, NULL);
+	kfree(core);
+	free_irq(client->irq, core);
+err_request_irq:
+	pdata->free_resources();
+err_new_mixer:
+	kfree(core->buffer);
+err_kmalloc:
+	kfree(core);
+	dev_dbg(&client->dev, "%s\n", __func__);
+
+	return r;
+}
+
+static struct i2c_driver wl1273_core_driver = {
+	.driver = {
+		.name = WL1273_FM_DRIVER_NAME,
+	},
+	.probe = wl1273_core_probe,
+	.id_table = wl1273_driver_id_table,
+	.remove = __devexit_p(wl1273_core_remove),
+};
+
+static int __init wl1273_core_init(void)
+{
+	int r;
+
+	r = i2c_add_driver(&wl1273_core_driver);
+	if (r) {
+		pr_err(WL1273_FM_DRIVER_NAME
+		       ": driver registration failed\n");
+		return r;
+	}
+
+	return 0;
+}
+
+static void __exit wl1273_core_exit(void)
+{
+	flush_scheduled_work();
+
+	i2c_del_driver(&wl1273_core_driver);
+}
+late_initcall(wl1273_core_init);
+module_exit(wl1273_core_exit);
+
+MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/wl1273-core.h b/include/linux/mfd/wl1273-core.h
new file mode 100644
index 0000000..6979778
--- /dev/null
+++ b/include/linux/mfd/wl1273-core.h
@@ -0,0 +1,314 @@
+/*
+ * include/media/radio/radio-wl1273.h
+ *
+ * Some definitions for the wl1273 radio receiver/transmitter chip.
+ *
+ * Copyright (C) Nokia Corporation
+ * Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef RADIO_WL1273_H
+#define RADIO_WL1273_H
+
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+
+#define WL1273_FM_DRIVER_NAME	"wl1273-fm"
+#define RX71_FM_I2C_ADDR	0x22
+
+#define WL1273_STEREO_GET		0
+#define WL1273_RSSI_LVL_GET		1
+#define WL1273_IF_COUNT_GET		2
+#define WL1273_FLAG_GET			3
+#define WL1273_RDS_SYNC_GET		4
+#define WL1273_RDS_DATA_GET		5
+#define WL1273_FREQ_SET			10
+#define WL1273_AF_FREQ_SET		11
+#define WL1273_MOST_MODE_SET		12
+#define WL1273_MOST_BLEND_SET		13
+#define WL1273_DEMPH_MODE_SET		14
+#define WL1273_SEARCH_LVL_SET		15
+#define WL1273_BAND_SET			16
+#define WL1273_MUTE_STATUS_SET		17
+#define WL1273_RDS_PAUSE_LVL_SET	18
+#define WL1273_RDS_PAUSE_DUR_SET	19
+#define WL1273_RDS_MEM_SET		20
+#define WL1273_RDS_BLK_B_SET		21
+#define WL1273_RDS_MSK_B_SET		22
+#define WL1273_RDS_PI_MASK_SET		23
+#define WL1273_RDS_PI_SET		24
+#define WL1273_RDS_SYSTEM_SET		25
+#define WL1273_INT_MASK_SET		26
+#define WL1273_SEARCH_DIR_SET		27
+#define WL1273_VOLUME_SET		28
+#define WL1273_AUDIO_ENABLE		29
+#define WL1273_PCM_MODE_SET		30
+#define WL1273_I2S_MODE_CONFIG_SET	31
+#define WL1273_POWER_SET		32
+#define WL1273_INTX_CONFIG_SET		33
+#define WL1273_PULL_EN_SET		34
+#define WL1273_HILO_SET			35
+#define WL1273_SWITCH2FREF		36
+#define WL1273_FREQ_DRIFT_REPORT	37
+
+#define WL1273_PCE_GET			40
+#define WL1273_FIRM_VER_GET		41
+#define WL1273_ASIC_VER_GET		42
+#define WL1273_ASIC_ID_GET		43
+#define WL1273_MAN_ID_GET		44
+#define WL1273_TUNER_MODE_SET		45
+#define WL1273_STOP_SEARCH		46
+#define WL1273_RDS_CNTRL_SET		47
+
+#define WL1273_WRITE_HARDWARE_REG	100
+#define WL1273_CODE_DOWNLOAD		101
+#define WL1273_RESET			102
+
+#define WL1273_FM_POWER_MODE		254
+#define WL1273_FM_INTERRUPT		255
+
+/* Transmitter API */
+
+#define WL1273_CHANL_SET		55
+#define WL1273_SCAN_SPACING_SET		56
+#define WL1273_REF_SET			57
+#define WL1273_POWER_ENB_SET		90
+#define WL1273_POWER_ATT_SET		58
+#define WL1273_POWER_LEV_SET		59
+#define WL1273_AUDIO_DEV_SET		60
+#define WL1273_PILOT_DEV_SET		61
+#define WL1273_RDS_DEV_SET		62
+#define WL1273_PUPD_SET			91
+#define WL1273_AUDIO_IO_SET		63
+#define WL1273_PREMPH_SET		64
+#define WL1273_MONO_SET			66
+#define WL1273_MUTE			92
+#define WL1273_MPX_LMT_ENABLE		67
+#define WL1273_PI_SET			93
+#define WL1273_ECC_SET			69
+#define WL1273_PTY			70
+#define WL1273_AF			71
+#define WL1273_DISPLAY_MODE		74
+#define WL1273_RDS_REP_SET		77
+#define WL1273_RDS_CONFIG_DATA_SET	98
+#define WL1273_RDS_DATA_SET		99
+#define WL1273_RDS_DATA_ENB		94
+#define WL1273_TA_SET			78
+#define WL1273_TP_SET			79
+#define WL1273_DI_SET			80
+#define WL1273_MS_SET			81
+#define WL1273_PS_SCROLL_SPEED		82
+#define WL1273_TX_AUDIO_LEVEL_TEST	96
+#define WL1273_TX_AUDIO_LEVEL_TEST_THRESHOLD	73
+#define WL1273_TX_AUDIO_INPUT_LEVEL_RANGE_SET	54
+#define WL1273_RX_ANTENNA_SELECT	87
+#define WL1273_I2C_DEV_ADDR_SET		86
+#define WL1273_REF_ERR_CALIB_PARAM_SET		88
+#define WL1273_REF_ERR_CALIB_PERIODICITY_SET	89
+#define WL1273_SOC_INT_TRIGGER			52
+#define WL1273_SOC_AUDIO_PATH_SET		83
+#define WL1273_SOC_PCMI_OVERRIDE		84
+#define WL1273_SOC_I2S_OVERRIDE		85
+#define WL1273_RSSI_BLOCK_SCAN_FREQ_SET	95
+#define WL1273_RSSI_BLOCK_SCAN_START	97
+#define WL1273_RSSI_BLOCK_SCAN_DATA_GET	 5
+#define WL1273_READ_FMANT_TUNE_VALUE		104
+
+#define WL1273_RDS_OFF		0
+#define WL1273_RDS_ON		1
+#define WL1273_RDS_RESET	2
+
+#define WL1273_AUDIO_DIGITAL	0
+#define WL1273_AUDIO_ANALOG	1
+
+#define WL1273_MODE_RX		(1 << 0)
+#define WL1273_MODE_TX		(1 << 1)
+#define WL1273_MODE_OFF		(1 << 2)
+#define WL1273_MODE_SUSPENDED	(1 << 3)
+
+#define WL1273_RADIO_CHILD	(1 << 0)
+#define WL1273_CODEC_CHILD	(1 << 1)
+
+#define WL1273_RX_MONO		1
+#define WL1273_RX_STEREO	0
+#define WL1273_TX_MONO		0
+#define WL1273_TX_STEREO	1
+
+#define WL1273_MAX_VOLUME	0xffff
+#define WL1273_DEFAULT_VOLUME	0x78b8
+
+/* I2S protocol, left channel first, data width 16 bits */
+#define WL1273_PCM_DEF_MODE		0x00
+
+/* Rx */
+#define WL1273_AUDIO_ENABLE_I2S		(1 << 0)
+#define WL1273_AUDIO_ENABLE_ANALOG	(1 << 1)
+
+/* Tx */
+#define WL1273_AUDIO_IO_SET_ANALOG	0
+#define WL1273_AUDIO_IO_SET_I2S		1
+
+#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
+
+/* I2S mode */
+#define WL1273_IS2_WIDTH_32	0x0
+#define WL1273_IS2_WIDTH_40	0x1
+#define WL1273_IS2_WIDTH_22_23	0x2
+#define WL1273_IS2_WIDTH_23_22	0x3
+#define WL1273_IS2_WIDTH_48	0x4
+#define WL1273_IS2_WIDTH_50	0x5
+#define WL1273_IS2_WIDTH_60	0x6
+#define WL1273_IS2_WIDTH_64	0x7
+#define WL1273_IS2_WIDTH_80	0x8
+#define WL1273_IS2_WIDTH_96	0x9
+#define WL1273_IS2_WIDTH_128	0xa
+#define WL1273_IS2_WIDTH	0xf
+
+#define WL1273_IS2_FORMAT_STD	(0x0 << 4)
+#define WL1273_IS2_FORMAT_LEFT	(0x1 << 4)
+#define WL1273_IS2_FORMAT_RIGHT	(0x2 << 4)
+#define WL1273_IS2_FORMAT_USER	(0x3 << 4)
+
+#define WL1273_IS2_MASTER	(0x0 << 6)
+#define WL1273_IS2_SLAVEW	(0x1 << 6)
+
+#define WL1273_IS2_TRI_AFTER_SENDING	(0x0 << 7)
+#define WL1273_IS2_TRI_ALWAYS_ACTIVE	(0x1 << 7)
+
+#define WL1273_IS2_SDOWS_RR	(0x0 << 8)
+#define WL1273_IS2_SDOWS_RF	(0x1 << 8)
+#define WL1273_IS2_SDOWS_FR	(0x2 << 8)
+#define WL1273_IS2_SDOWS_FF	(0x3 << 8)
+
+#define WL1273_IS2_TRI_OPT	(0x0 << 10)
+#define WL1273_IS2_TRI_ALWAYS	(0x1 << 10)
+
+#define WL1273_IS2_RATE_48K	(0x0 << 12)
+#define WL1273_IS2_RATE_44_1K	(0x1 << 12)
+#define WL1273_IS2_RATE_32K	(0x2 << 12)
+#define WL1273_IS2_RATE_22_05K	(0x4 << 12)
+#define WL1273_IS2_RATE_16K	(0x5 << 12)
+#define WL1273_IS2_RATE_12K	(0x8 << 12)
+#define WL1273_IS2_RATE_11_025	(0x9 << 12)
+#define WL1273_IS2_RATE_8K	(0xa << 12)
+#define WL1273_IS2_RATE		(0xf << 12)
+
+#define WL1273_I2S_DEF_MODE	(WL1273_IS2_WIDTH_32 | \
+				 WL1273_IS2_FORMAT_STD | \
+				 WL1273_IS2_MASTER | \
+				 WL1273_IS2_TRI_AFTER_SENDING | \
+				 WL1273_IS2_SDOWS_RR | \
+				 WL1273_IS2_TRI_OPT | \
+				 WL1273_IS2_RATE_48K)
+
+#define SCHAR_MIN (-128)
+#define SCHAR_MAX 127
+
+#define WL1273_FR_EVENT			(1 << 0)
+#define WL1273_BL_EVENT			(1 << 1)
+#define WL1273_RDS_EVENT		(1 << 2)
+#define WL1273_BBLK_EVENT		(1 << 3)
+#define WL1273_LSYNC_EVENT		(1 << 4)
+#define WL1273_LEV_EVENT		(1 << 5)
+#define WL1273_IFFR_EVENT		(1 << 6)
+#define WL1273_PI_EVENT			(1 << 7)
+#define WL1273_PD_EVENT			(1 << 8)
+#define WL1273_STIC_EVENT		(1 << 9)
+#define WL1273_MAL_EVENT		(1 << 10)
+#define WL1273_POW_ENB_EVENT		(1 << 11)
+#define WL1273_SCAN_OVER_EVENT		(1 << 12)
+#define WL1273_ERROR_EVENT		(1 << 13)
+
+#define TUNER_MODE_STOP_SEARCH		0
+#define TUNER_MODE_PRESET		1
+#define TUNER_MODE_AUTO_SEEK		2
+#define TUNER_MODE_AF			3
+#define TUNER_MODE_AUTO_SEEK_PI		4
+#define TUNER_MODE_AUTO_SEEK_BULK	5
+
+struct band_info {
+	u32 bottom_frequency;
+	u32 top_frequency;
+	u8 band;
+};
+
+struct wl1273_fm_platform_data {
+	int (*request_resources) (struct i2c_client *client);
+	void (*free_resources) (void);
+	void (*enable) (void);
+	void (*disable) (void);
+
+	u8 forbidden_modes;
+	unsigned int children;
+};
+
+#define WL1273_FM_CORE_CELLS	2
+
+struct wl1273_core {
+	struct mfd_cell cells[WL1273_FM_CORE_CELLS];
+	struct i2c_client *i2c_dev;
+
+	u8 forbidden;
+	unsigned int mode;
+	unsigned int preemphasis;
+	unsigned int audio_mode;
+	unsigned int spacing;
+	unsigned int tx_power;
+	unsigned int rx_frequency;
+	unsigned int tx_frequency;
+	unsigned int band;
+	unsigned int i2s_mode;
+	unsigned int channel_number;
+	unsigned int number_of_bands;
+	unsigned int volume;
+	bool stereo;
+
+	const struct band_info *bands;
+
+	/* RDS */
+	bool rds_on;
+	struct delayed_work work;
+
+	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;
+};
+
+int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param);
+int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len);
+int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value);
+
+int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int mode);
+int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume);
+
+#endif	/* ifndef RADIO_WL1273_H */
-- 
1.6.1.3