diff options
Diffstat (limited to 'sound/soc/s3c24xx/s3c24xx_uda134x.c')
| -rw-r--r-- | sound/soc/s3c24xx/s3c24xx_uda134x.c | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/sound/soc/s3c24xx/s3c24xx_uda134x.c b/sound/soc/s3c24xx/s3c24xx_uda134x.c deleted file mode 100644 index cdc8ecbcb8ef..000000000000 --- a/sound/soc/s3c24xx/s3c24xx_uda134x.c +++ /dev/null @@ -1,367 +0,0 @@ -/* - * Modifications by Christian Pellegrin <chripell@evolware.org> - * - * s3c24xx_uda134x.c -- S3C24XX_UDA134X ALSA SoC Audio board driver - * - * Copyright 2007 Dension Audio Systems Ltd. - * Author: Zoltan Devai - * - * 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. - */ - -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/mutex.h> -#include <linux/gpio.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/soc.h> -#include <sound/s3c24xx_uda134x.h> -#include <sound/uda134x.h> - -#include <plat/regs-iis.h> - -#include "dma.h" -#include "s3c24xx-i2s.h" -#include "../codecs/uda134x.h" - - -/* #define ENFORCE_RATES 1 */ -/* - Unfortunately the S3C24XX in master mode has a limited capacity of - generating the clock for the codec. If you define this only rates - that are really available will be enforced. But be careful, most - user level application just want the usual sampling frequencies (8, - 11.025, 22.050, 44.1 kHz) and anyway resampling is a costly - operation for embedded systems. So if you aren't very lucky or your - hardware engineer wasn't very forward-looking it's better to leave - this undefined. If you do so an approximate value for the requested - sampling rate in the range -/+ 5% will be chosen. If this in not - possible an error will be returned. -*/ - -static struct clk *xtal; -static struct clk *pclk; -/* this is need because we don't have a place where to keep the - * pointers to the clocks in each substream. We get the clocks only - * when we are actually using them so we don't block stuff like - * frequency change or oscillator power-off */ -static int clk_users; -static DEFINE_MUTEX(clk_lock); - -static unsigned int rates[33 * 2]; -#ifdef ENFORCE_RATES -static struct snd_pcm_hw_constraint_list hw_constraints_rates = { - .count = ARRAY_SIZE(rates), - .list = rates, - .mask = 0, -}; -#endif - -static struct platform_device *s3c24xx_uda134x_snd_device; - -static int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream) -{ - int ret = 0; -#ifdef ENFORCE_RATES - struct snd_pcm_runtime *runtime = substream->runtime; -#endif - - mutex_lock(&clk_lock); - pr_debug("%s %d\n", __func__, clk_users); - if (clk_users == 0) { - xtal = clk_get(&s3c24xx_uda134x_snd_device->dev, "xtal"); - if (!xtal) { - printk(KERN_ERR "%s cannot get xtal\n", __func__); - ret = -EBUSY; - } else { - pclk = clk_get(&s3c24xx_uda134x_snd_device->dev, - "pclk"); - if (!pclk) { - printk(KERN_ERR "%s cannot get pclk\n", - __func__); - clk_put(xtal); - ret = -EBUSY; - } - } - if (!ret) { - int i, j; - - for (i = 0; i < 2; i++) { - int fs = i ? 256 : 384; - - rates[i*33] = clk_get_rate(xtal) / fs; - for (j = 1; j < 33; j++) - rates[i*33 + j] = clk_get_rate(pclk) / - (j * fs); - } - } - } - clk_users += 1; - mutex_unlock(&clk_lock); - if (!ret) { -#ifdef ENFORCE_RATES - ret = snd_pcm_hw_constraint_list(runtime, 0, - SNDRV_PCM_HW_PARAM_RATE, - &hw_constraints_rates); - if (ret < 0) - printk(KERN_ERR "%s cannot set constraints\n", - __func__); -#endif - } - return ret; -} - -static void s3c24xx_uda134x_shutdown(struct snd_pcm_substream *substream) -{ - mutex_lock(&clk_lock); - pr_debug("%s %d\n", __func__, clk_users); - clk_users -= 1; - if (clk_users == 0) { - clk_put(xtal); - xtal = NULL; - clk_put(pclk); - pclk = NULL; - } - mutex_unlock(&clk_lock); -} - -static int s3c24xx_uda134x_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct snd_soc_dai *codec_dai = rtd->codec_dai; - struct snd_soc_dai *cpu_dai = rtd->cpu_dai; - unsigned int clk = 0; - int ret = 0; - int clk_source, fs_mode; - unsigned long rate = params_rate(params); - long err, cerr; - unsigned int div; - int i, bi; - - err = 999999; - bi = 0; - for (i = 0; i < 2*33; i++) { - cerr = rates[i] - rate; - if (cerr < 0) - cerr = -cerr; - if (cerr < err) { - err = cerr; - bi = i; - } - } - if (bi / 33 == 1) - fs_mode = S3C2410_IISMOD_256FS; - else - fs_mode = S3C2410_IISMOD_384FS; - if (bi % 33 == 0) { - clk_source = S3C24XX_CLKSRC_MPLL; - div = 1; - } else { - clk_source = S3C24XX_CLKSRC_PCLK; - div = bi % 33; - } - pr_debug("%s desired rate %lu, %d\n", __func__, rate, bi); - - clk = (fs_mode == S3C2410_IISMOD_384FS ? 384 : 256) * rate; - pr_debug("%s will use: %s %s %d sysclk %d err %ld\n", __func__, - fs_mode == S3C2410_IISMOD_384FS ? "384FS" : "256FS", - clk_source == S3C24XX_CLKSRC_MPLL ? "MPLLin" : "PCLK", - div, clk, err); - - if ((err * 100 / rate) > 5) { - printk(KERN_ERR "S3C24XX_UDA134X: effective frequency " - "too different from desired (%ld%%)\n", - err * 100 / rate); - return -EINVAL; - } - - ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); - if (ret < 0) - return ret; - - ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); - if (ret < 0) - return ret; - - ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source , clk, - SND_SOC_CLOCK_IN); - if (ret < 0) - return ret; - - ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK, fs_mode); - if (ret < 0) - return ret; - - ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK, - S3C2410_IISMOD_32FS); - if (ret < 0) - return ret; - - ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER, - S3C24XX_PRESCALE(div, div)); - if (ret < 0) - return ret; - - /* set the codec system clock for DAC and ADC */ - ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, - SND_SOC_CLOCK_OUT); - if (ret < 0) - return ret; - - return 0; -} - -static struct snd_soc_ops s3c24xx_uda134x_ops = { - .startup = s3c24xx_uda134x_startup, - .shutdown = s3c24xx_uda134x_shutdown, - .hw_params = s3c24xx_uda134x_hw_params, -}; - -static struct snd_soc_dai_link s3c24xx_uda134x_dai_link = { - .name = "UDA134X", - .stream_name = "UDA134X", - .codec_name = "uda134x-hifi", - .codec_dai_name = "uda134x-hifi", - .cpu_dai_name = "s3c24xx-i2s", - .ops = &s3c24xx_uda134x_ops, - .platform_name = "samsung-audio", -}; - -static struct snd_soc_card snd_soc_s3c24xx_uda134x = { - .name = "S3C24XX_UDA134X", - .dai_link = &s3c24xx_uda134x_dai_link, - .num_links = 1, -}; - -static struct s3c24xx_uda134x_platform_data *s3c24xx_uda134x_l3_pins; - -static void setdat(int v) -{ - gpio_set_value(s3c24xx_uda134x_l3_pins->l3_data, v > 0); -} - -static void setclk(int v) -{ - gpio_set_value(s3c24xx_uda134x_l3_pins->l3_clk, v > 0); -} - -static void setmode(int v) -{ - gpio_set_value(s3c24xx_uda134x_l3_pins->l3_mode, v > 0); -} - -/* FIXME - This must be codec platform data but in which board file ?? */ -static struct uda134x_platform_data s3c24xx_uda134x = { - .l3 = { - .setdat = setdat, - .setclk = setclk, - .setmode = setmode, - .data_hold = 1, - .data_setup = 1, - .clock_high = 1, - .mode_hold = 1, - .mode = 1, - .mode_setup = 1, - }, -}; - -static int s3c24xx_uda134x_setup_pin(int pin, char *fun) -{ - if (gpio_request(pin, "s3c24xx_uda134x") < 0) { - printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: " - "l3 %s pin already in use", fun); - return -EBUSY; - } - gpio_direction_output(pin, 0); - return 0; -} - -static int s3c24xx_uda134x_probe(struct platform_device *pdev) -{ - int ret; - - printk(KERN_INFO "S3C24XX_UDA134X SoC Audio driver\n"); - - s3c24xx_uda134x_l3_pins = pdev->dev.platform_data; - if (s3c24xx_uda134x_l3_pins == NULL) { - printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: " - "unable to find platform data\n"); - return -ENODEV; - } - s3c24xx_uda134x.power = s3c24xx_uda134x_l3_pins->power; - s3c24xx_uda134x.model = s3c24xx_uda134x_l3_pins->model; - - if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_data, - "data") < 0) - return -EBUSY; - if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_clk, - "clk") < 0) { - gpio_free(s3c24xx_uda134x_l3_pins->l3_data); - return -EBUSY; - } - if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_mode, - "mode") < 0) { - gpio_free(s3c24xx_uda134x_l3_pins->l3_data); - gpio_free(s3c24xx_uda134x_l3_pins->l3_clk); - return -EBUSY; - } - - s3c24xx_uda134x_snd_device = platform_device_alloc("soc-audio", -1); - if (!s3c24xx_uda134x_snd_device) { - printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: " - "Unable to register\n"); - return -ENOMEM; - } - - platform_set_drvdata(s3c24xx_uda134x_snd_device, - &snd_soc_s3c24xx_uda134x); - ret = platform_device_add(s3c24xx_uda134x_snd_device); - if (ret) { - printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: Unable to add\n"); - platform_device_put(s3c24xx_uda134x_snd_device); - } - - return ret; -} - -static int s3c24xx_uda134x_remove(struct platform_device *pdev) -{ - platform_device_unregister(s3c24xx_uda134x_snd_device); - gpio_free(s3c24xx_uda134x_l3_pins->l3_data); - gpio_free(s3c24xx_uda134x_l3_pins->l3_clk); - gpio_free(s3c24xx_uda134x_l3_pins->l3_mode); - return 0; -} - -static struct platform_driver s3c24xx_uda134x_driver = { - .probe = s3c24xx_uda134x_probe, - .remove = s3c24xx_uda134x_remove, - .driver = { - .name = "s3c24xx_uda134x", - .owner = THIS_MODULE, - }, -}; - -static int __init s3c24xx_uda134x_init(void) -{ - return platform_driver_register(&s3c24xx_uda134x_driver); -} - -static void __exit s3c24xx_uda134x_exit(void) -{ - platform_driver_unregister(&s3c24xx_uda134x_driver); -} - - -module_init(s3c24xx_uda134x_init); -module_exit(s3c24xx_uda134x_exit); - -MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>"); -MODULE_DESCRIPTION("S3C24XX_UDA134X ALSA SoC audio driver"); -MODULE_LICENSE("GPL"); |