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

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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: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Matti Aaltonen 2010-12-10 11:41:33 -03:00 committed by Mauro Carvalho Chehab
parent 00765f16f1
commit 383268a8e2
4 changed files with 447 additions and 0 deletions
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10
drivers/mfd/Kconfig
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@ -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"

1
drivers/mfd/Makefile
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@ -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

148
drivers/mfd/wl1273-core.c Normal file
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@ -0,0 +1,148 @@
/*
* 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");

288
include/linux/mfd/wl1273-core.h Normal file
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@ -0,0 +1,288 @@
/*
* 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 */