| /* |
| * MFD driver for twl4030 audio submodule, which contains an audio codec, and |
| * the vibra control. |
| * |
| * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> |
| * |
| * Copyright: (C) 2009 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/module.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/platform_device.h> |
| #include <linux/i2c/twl.h> |
| #include <linux/mfd/core.h> |
| #include <linux/mfd/twl4030-audio.h> |
| |
| #define TWL4030_AUDIO_CELLS 2 |
| |
| static struct platform_device *twl4030_audio_dev; |
| |
| struct twl4030_audio_resource { |
| int request_count; |
| u8 reg; |
| u8 mask; |
| }; |
| |
| struct twl4030_audio { |
| unsigned int audio_mclk; |
| struct mutex mutex; |
| struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX]; |
| struct mfd_cell cells[TWL4030_AUDIO_CELLS]; |
| }; |
| |
| /* |
| * Modify the resource, the function returns the content of the register |
| * after the modification. |
| */ |
| static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable) |
| { |
| struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev); |
| u8 val; |
| |
| twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val, |
| audio->resource[id].reg); |
| |
| if (enable) |
| val |= audio->resource[id].mask; |
| else |
| val &= ~audio->resource[id].mask; |
| |
| twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, |
| val, audio->resource[id].reg); |
| |
| return val; |
| } |
| |
| static inline int twl4030_audio_get_resource(enum twl4030_audio_res id) |
| { |
| struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev); |
| u8 val; |
| |
| twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val, |
| audio->resource[id].reg); |
| |
| return val; |
| } |
| |
| /* |
| * Enable the resource. |
| * The function returns with error or the content of the register |
| */ |
| int twl4030_audio_enable_resource(enum twl4030_audio_res id) |
| { |
| struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev); |
| int val; |
| |
| if (id >= TWL4030_AUDIO_RES_MAX) { |
| dev_err(&twl4030_audio_dev->dev, |
| "Invalid resource ID (%u)\n", id); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&audio->mutex); |
| if (!audio->resource[id].request_count) |
| /* Resource was disabled, enable it */ |
| val = twl4030_audio_set_resource(id, 1); |
| else |
| val = twl4030_audio_get_resource(id); |
| |
| audio->resource[id].request_count++; |
| mutex_unlock(&audio->mutex); |
| |
| return val; |
| } |
| EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource); |
| |
| /* |
| * Disable the resource. |
| * The function returns with error or the content of the register |
| */ |
| int twl4030_audio_disable_resource(unsigned id) |
| { |
| struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev); |
| int val; |
| |
| if (id >= TWL4030_AUDIO_RES_MAX) { |
| dev_err(&twl4030_audio_dev->dev, |
| "Invalid resource ID (%u)\n", id); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&audio->mutex); |
| if (!audio->resource[id].request_count) { |
| dev_err(&twl4030_audio_dev->dev, |
| "Resource has been disabled already (%u)\n", id); |
| mutex_unlock(&audio->mutex); |
| return -EPERM; |
| } |
| audio->resource[id].request_count--; |
| |
| if (!audio->resource[id].request_count) |
| /* Resource can be disabled now */ |
| val = twl4030_audio_set_resource(id, 0); |
| else |
| val = twl4030_audio_get_resource(id); |
| |
| mutex_unlock(&audio->mutex); |
| |
| return val; |
| } |
| EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource); |
| |
| unsigned int twl4030_audio_get_mclk(void) |
| { |
| struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev); |
| |
| return audio->audio_mclk; |
| } |
| EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk); |
| |
| static int __devinit twl4030_audio_probe(struct platform_device *pdev) |
| { |
| struct twl4030_audio *audio; |
| struct twl4030_audio_data *pdata = pdev->dev.platform_data; |
| struct mfd_cell *cell = NULL; |
| int ret, childs = 0; |
| u8 val; |
| |
| if (!pdata) { |
| dev_err(&pdev->dev, "Platform data is missing\n"); |
| return -EINVAL; |
| } |
| |
| audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio), |
| GFP_KERNEL); |
| if (!audio) |
| return -ENOMEM; |
| |
| mutex_init(&audio->mutex); |
| audio->audio_mclk = pdata->audio_mclk; |
| |
| /* Configure APLL_INFREQ and disable APLL if enabled */ |
| switch (audio->audio_mclk) { |
| case 19200000: |
| val = TWL4030_APLL_INFREQ_19200KHZ; |
| break; |
| case 26000000: |
| val = TWL4030_APLL_INFREQ_26000KHZ; |
| break; |
| case 38400000: |
| val = TWL4030_APLL_INFREQ_38400KHZ; |
| break; |
| default: |
| dev_err(&pdev->dev, "Invalid audio_mclk\n"); |
| return -EINVAL; |
| } |
| twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL); |
| |
| /* Codec power */ |
| audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE; |
| audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ; |
| |
| /* PLL */ |
| audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL; |
| audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN; |
| |
| if (pdata->codec) { |
| cell = &audio->cells[childs]; |
| cell->name = "twl4030-codec"; |
| cell->platform_data = pdata->codec; |
| cell->pdata_size = sizeof(*pdata->codec); |
| childs++; |
| } |
| if (pdata->vibra) { |
| cell = &audio->cells[childs]; |
| cell->name = "twl4030-vibra"; |
| cell->platform_data = pdata->vibra; |
| cell->pdata_size = sizeof(*pdata->vibra); |
| childs++; |
| } |
| |
| platform_set_drvdata(pdev, audio); |
| twl4030_audio_dev = pdev; |
| |
| if (childs) |
| ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells, |
| childs, NULL, 0, NULL); |
| else { |
| dev_err(&pdev->dev, "No platform data found for childs\n"); |
| ret = -ENODEV; |
| } |
| |
| if (ret) { |
| platform_set_drvdata(pdev, NULL); |
| twl4030_audio_dev = NULL; |
| } |
| |
| return ret; |
| } |
| |
| static int __devexit twl4030_audio_remove(struct platform_device *pdev) |
| { |
| mfd_remove_devices(&pdev->dev); |
| platform_set_drvdata(pdev, NULL); |
| twl4030_audio_dev = NULL; |
| |
| return 0; |
| } |
| |
| static struct platform_driver twl4030_audio_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "twl4030-audio", |
| }, |
| .probe = twl4030_audio_probe, |
| .remove = __devexit_p(twl4030_audio_remove), |
| }; |
| |
| module_platform_driver(twl4030_audio_driver); |
| |
| MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); |
| MODULE_DESCRIPTION("TWL4030 audio block MFD driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:twl4030-audio"); |