Commit 383268a8 authored by Matti Aaltonen's avatar Matti Aaltonen Committed by Mauro Carvalho Chehab
Browse files

[media] MFD: WL1273 FM Radio: MFD driver for the FM radio 



This is the core of the WL1273 FM radio driver, it connects
the two child modules. The two child drivers are
drivers/media/radio/radio-wl1273.c and sound/soc/codecs/wl1273.c.

The radio-wl1273 driver implements the V4L2 interface and communicates
with the device. The ALSA codec offers digital audio, without it only
analog audio is available.

Signed-off-by: default avatarMatti J. Aaltonen <matti.j.aaltonen@nokia.com>
Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 00765f16

drivers/mfd/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -606,6 +606,16 @@ config MFD_VX855 
	  VIA VX855/VX875 south bridge. You will need to enable the vx855_spi

	  and/or vx855_gpio drivers for this to do anything useful.



config MFD_WL1273_CORE

	tristate

	depends on I2C

	select MFD_CORE

	default n

	help

	  This is the core driver for the TI WL1273 FM radio. This MFD

	  driver connects the radio-wl1273 V4L2 module and the wl1273

	  audio codec.



endif # MFD_SUPPORT



menu "Multimedia Capabilities Port drivers"

drivers/mfd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -81,3 +81,4 @@ obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o 
obj-$(CONFIG_MFD_JZ4740_ADC)	+= jz4740-adc.o

obj-$(CONFIG_MFD_TPS6586X)	+= tps6586x.o

obj-$(CONFIG_MFD_VX855)		+= vx855.o

obj-$(CONFIG_MFD_WL1273_CORE)	+= wl1273-core.o

drivers/mfd/wl1273-core.c

0 → 100644
+148 −0
Original line number Diff line number Diff line 
/*

 * MFD driver for wl1273 FM radio and audio codec submodules.

 *

 * Copyright (C) 2010 Nokia Corporation

 * Author: Matti 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

 *

 */



#include <linux/mfd/wl1273-core.h>

#include <linux/slab.h>



#define DRIVER_DESC "WL1273 FM Radio Core"



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);



	dev_dbg(&client->dev, "%s\n", __func__);



	mfd_remove_devices(&client->dev);

	i2c_set_clientdata(client, NULL);

	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;

	struct wl1273_core *core;

	struct mfd_cell *cell;

	int children = 0;

	int r = 0;



	dev_dbg(&client->dev, "%s\n", __func__);



	if (!pdata) {

		dev_err(&client->dev, "No platform data.\n");

		return -EINVAL;

	}



	if (!(pdata->children & WL1273_RADIO_CHILD)) {

		dev_err(&client->dev, "Cannot function without radio child.\n");

		return -EINVAL;

	}



	core = kzalloc(sizeof(*core), GFP_KERNEL);

	if (!core)

		return -ENOMEM;



	core->pdata = pdata;

	core->client = client;

	mutex_init(&core->lock);



	i2c_set_clientdata(client, core);



	dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);



	cell = &core->cells[children];

	cell->name = "wl1273_fm_radio";

	cell->platform_data = &core;

	cell->data_size = sizeof(core);

	children++;



	if (pdata->children & WL1273_CODEC_CHILD) {

		cell = &core->cells[children];



		dev_dbg(&client->dev, "%s: Have codec.\n", __func__);

		cell->name = "wl1273-codec";

		cell->platform_data = &core;

		cell->data_size = sizeof(core);

		children++;

	}



	dev_dbg(&client->dev, "%s: number of children: %d.\n",

		__func__, children);



	r = mfd_add_devices(&client->dev, -1, core->cells,

			    children, NULL, 0);

	if (r)

		goto err;



	return 0;



err:

	i2c_set_clientdata(client, NULL);

	pdata->free_resources();

	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 r;

}



static void __exit wl1273_core_exit(void)

{

	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");

include/linux/mfd/wl1273-core.h

0 → 100644
+288 −0
Original line number Diff line number Diff line 
/*

 * include/linux/mfd/wl1273-core.h

 *

 * Some definitions for the wl1273 radio receiver/transmitter chip.

 *

 * Copyright (C) 2010 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 WL1273_CORE_H

#define WL1273_CORE_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		BIT(0)

#define WL1273_MODE_TX		BIT(1)

#define WL1273_MODE_OFF		BIT(2)

#define WL1273_MODE_SUSPENDED	BIT(3)



#define WL1273_RADIO_CHILD	BIT(0)

#define WL1273_CODEC_CHILD	BIT(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		BIT(0)

#define WL1273_AUDIO_ENABLE_ANALOG	BIT(1)



/* Tx */

#define WL1273_AUDIO_IO_SET_ANALOG	0

#define WL1273_AUDIO_IO_SET_I2S		1



#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			BIT(0)

#define WL1273_BL_EVENT			BIT(1)

#define WL1273_RDS_EVENT		BIT(2)

#define WL1273_BBLK_EVENT		BIT(3)

#define WL1273_LSYNC_EVENT		BIT(4)

#define WL1273_LEV_EVENT		BIT(5)

#define WL1273_IFFR_EVENT		BIT(6)

#define WL1273_PI_EVENT			BIT(7)

#define WL1273_PD_EVENT			BIT(8)

#define WL1273_STIC_EVENT		BIT(9)

#define WL1273_MAL_EVENT		BIT(10)

#define WL1273_POW_ENB_EVENT		BIT(11)

#define WL1273_SCAN_OVER_EVENT		BIT(12)

#define WL1273_ERROR_EVENT		BIT(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



#define RDS_BLOCK_SIZE	3



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



#define WL1273_BAND_OTHER	0

#define WL1273_BAND_JAPAN	1



#define WL1273_BAND_JAPAN_LOW	76000

#define WL1273_BAND_JAPAN_HIGH	90000

#define WL1273_BAND_OTHER_LOW	87500

#define WL1273_BAND_OTHER_HIGH	108000



#define WL1273_BAND_TX_LOW	76000

#define WL1273_BAND_TX_HIGH	108000



struct wl1273_core {

	struct mfd_cell cells[WL1273_FM_CORE_CELLS];

	struct wl1273_fm_platform_data *pdata;



	unsigned int mode;

	unsigned int i2s_mode;

	unsigned int volume;

	unsigned int audio_mode;

	unsigned int channel_number;

	struct mutex lock; /* for serializing fm radio operations */



	struct i2c_client *client;



	int (*write)(struct wl1273_core *core, u8, u16);

	int (*set_audio)(struct wl1273_core *core, unsigned int);

	int (*set_volume)(struct wl1273_core *core, unsigned int);

};



#endif	/* ifndef WL1273_CORE_H */

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