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- /*
- * Glue audio driver for the SA1111 compagnon chip & Philips UDA1341 codec.
- *
- * Copyright (C) 2007, Ryu Euiyoul <ryu.real@gmail.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License.
- */
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/clk.h>
- #include <linux/sched.h>
- #include <linux/sound.h>
- #include <linux/soundcard.h>
- #include <linux/errno.h>
- #include <linux/device.h>
- #include <linux/interrupt.h>
- #include <linux/l3/l3.h>
- #include <linux/l3/uda1341.h>
- #include <linux/platform_device.h>
- #include <asm/hardware.h>
- #include <asm/semaphore.h>
- #include <asm/irq.h>
- #include <asm/uaccess.h>
- #include <asm/dma.h>
- #include <asm/io.h>
- #include <asm/arch/dma.h>
- #include <asm/arch/regs-iis.h>
- #include <asm/arch/regs-gpio.h>
- #include <asm/arch/regs-s3c6400-clock.h>
- #include "s3c6400_pcm.h"
- #define DPRINTK( x... )
- //#define DPRINTK printk
- #define S_CLOCK_FREQ 384
- #define CONFIG_IIS_24BIT
- static DECLARE_MUTEX(s3c_lock);
- static int
- mixer_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
- {
- printk("Warning: Set the mixer at %s, %d\n",__FUNCTION__,__LINE__);
- //return uda1341_mixer_ctl(uda1341, cmd, (void *)arg);
- return 0;
- }
- static struct file_operations uda1341_mixer_fops = {
- .owner = THIS_MODULE,
- .ioctl = mixer_ioctl,
- };
- static int l3_gpio_set(void)
- {
- s3c_gpio_cfgpin(S3C_GPN15, S3C_GPN15_OUTP); /* DAT */
- s3c_gpio_cfgpin(S3C_GPN14, S3C_GPN14_OUTP); /* MOD */
- s3c_gpio_cfgpin(S3C_GPN13, S3C_GPN13_OUTP); /* CLK */
- s3c_gpio_setpin(S3C_GPN15, 0);
- s3c_gpio_setpin(S3C_GPN14, 1);
- s3c_gpio_setpin(S3C_GPN13, 1);
- return 0;
- }
- static int l3_uda1342_set_addr(u8 dat)
- {
- u32 i, j;
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN15, 0);
- s3c_gpio_setpin(S3C_GPN14, 0);
-
- for(j=0; j<4; j++);
- for(i=0; i<8; i++){
- if(dat & 0x1){
- s3c_gpio_setpin(S3C_GPN13, 0);
- s3c_gpio_setpin(S3C_GPN15, 1);
- for(j=0; j<4; j++);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN15, 1);
- for(j=0; j<4; j++);
- } else{
- s3c_gpio_setpin(S3C_GPN13, 0);
- s3c_gpio_setpin(S3C_GPN15, 0);
- for(j=0; j<4; j++);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN15, 0);
- for(j=0; j<4; j++);
- }
- dat >>= 1;
- }
- s3c_gpio_setpin(S3C_GPN15, 0);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN14, 1);
- return 0;
- }
- static int l3_uda1342_set_data(u8 dat)
- {
- u32 i, j;
- s3c_gpio_setpin(S3C_GPN15, 0);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN14, 1);
-
- for(j=0; j<4; j++);
- for(i=0; i<8; i++){
- if(dat & 0x1){
- s3c_gpio_setpin(S3C_GPN13, 0);
- s3c_gpio_setpin(S3C_GPN15, 1);
- for(j=0; j<4; j++);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN15, 1);
- for(j=0; j<4; j++);
- } else{
- s3c_gpio_setpin(S3C_GPN13, 0);
- s3c_gpio_setpin(S3C_GPN15, 0);
- for(j=0; j<4; j++);
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN15, 0);
- for(j=0; j<4; j++);
- }
- dat >>= 1;
- }
- s3c_gpio_setpin(S3C_GPN13, 1);
- s3c_gpio_setpin(S3C_GPN14, 1);
- s3c_gpio_setpin(S3C_GPN15, 0);
- return 0;
- }
- static int l3_uda1342_init(void)
- {
- l3_uda1342_set_addr(0x12);
- l3_uda1342_set_data(0x00);
- l3_uda1342_set_data(0x45);
- l3_uda1342_set_data(0x44);
- l3_uda1342_set_addr(0x12);
- l3_uda1342_set_data(0x00);
- l3_uda1342_set_data(0x44);
- l3_uda1342_set_data(0x44);
- return 0;
- }
- static int l3_uda1342_rec_init(void)
- {
- l3_uda1342_set_addr(0x12);
- l3_uda1342_set_data(0x80);
- l3_uda1342_set_data(0x0);
- l3_uda1342_set_data(0x14);
- l3_uda1342_set_addr(0x12);
- l3_uda1342_set_data(0x04);
- l3_uda1342_set_data(0xC0); /* 0xC0: ADC input amplifire gain 9dB */
- l3_uda1342_set_data(0x00); /* 0x0 : ADC mixer gain 0dB */
- return 0;
- }
- static long audio_set_dsp_speed(long val, int f_mode)
- {
- //u32 iispsr = 0, prescaler = 0;
- u32 iiscon = 0, iismod = 0, iisfic = 0;
- DPRINTK("%s : requested = %ld, f_mode = 0x%x\n",
- __FUNCTION__, val, f_mode);
- l3_gpio_set();
- l3_uda1342_init();
- if ( f_mode & FMODE_READ)
- l3_uda1342_rec_init();
- #if 0
- /* Setup the EPLL clock source */
- writel(0, S3C_EPLL_CON1);
- switch (val) {
- case 8000:
- case 16000:
- case 32000:
- writel((1 << 31) | (128 << 16) | (25 << 8) | (0 << 0),
- S3C_EPLL_CON0);
- break;
- case 48000:
- writel((1 << 31) | (192 << 16) | (25 << 8) | (0 << 0),
- S3C_EPLL_CON0);
- break;
- case 11025:
- case 22050:
- case 44100:
- default:
- writel((1 << 31) | (254 << 16) | (9 << 8) | (2 << 0),
- S3C_EPLL_CON0);
- break;
- }
- while (!(readl(S3C_EPLL_CON0) & (1 << 30)));
- //MUXepll : FOUTepll
- writel(readl(S3C_CLK_SRC) | S3C_CLKSRC_EPLL_CLKSEL, S3C_CLK_SRC);
- //AUDIO0 sel : FOUTepll
- writel((readl(S3C_CLK_SRC) & ~(0x7 << 7)) | (0 << 7), S3C_CLK_SRC);
- //CLK_DIV2 setting
- writel(0x0, S3C_CLK_DIV2);
- #endif
- /* FIFO is flushed before operation */
- iisfic = S3C_IIS_TX_FLUSH | S3C_IIS_RX_FLUSH;
- writel(iisfic, S3C_IIS0FIC);
- writel(0, S3C_IIS0FIC);
- #if 0
- /* Clear I2S prescaler value [13:8] and disable prescaler */
- iispsr = readl(S3C_IIS0PSR);
- iispsr &= ~((0x3f << 8) | (1 << 15));
- writel(iispsr, S3C_IIS0PSR);
- #endif
- /* Configure I2SMOD */
- iismod = S3C_IIS0MOD_IMS_EXTERNAL_MASTER | S3C_IIS0MOD_TXRXMODE
- | S3C_IIS0MOD_IIS;
- iismod |= S3C_IIS0MOD_384FS;
- #ifdef CONFIG_IIS_24BIT
- iismod |= S3C_IIS0MOD_48FS;
- iismod |= S3C_IIS0MOD_24BIT;
- #else
- iismod |= S3C_IIS0MOD_32FS;
- iismod |= S3C_IIS0MOD_16BIT;
- #endif
- writel(iismod, S3C_IIS0MOD);
- #if 0
- switch (val) {
- case 8000:
- case 11025:
- prescaler = 19;
- break;
- case 16000:
- case 22050:
- prescaler = 9;
- break;
- case 32000:
- case 44100:
- case 48000:
- default:
- prescaler = 4;
- break;
- }
- #endif
- // writel(readl(S3C_IIS0PSR) | (prescaler << 8) | (1 << 15),
- //writel(0x8020, S3C_IIS0PSR);
- iiscon = S3C_IIS0CON_TXDMACTIVE | S3C_IIS0CON_RXDMACTIVE;
- iiscon |= S3C_IIS0CON_I2SACTIVE;
- // iiscon |= (1<<16); /* underrun interrupt enable */
- #if 0
- DPRINTK("%s, IISCON: 0x%08x IISMOD: 0x%08x IISFIC : 0x%08x IISPSR: 0x%08x\n",
- __FUNCTION__, readl(S3C_IIS0CON),
- readl(S3C_IIS0MOD), readl(S3C_IIS0FIC), readl(S3C_IIS0PSR));
- #endif
- writel(iiscon, S3C_IIS0CON);
- return val;
- }
- static int s3c_audio_ioctl(struct inode *inode,
- struct file *file, uint cmd, ulong arg)
- {
- long val = 0;
- int ret = 0;
-
- audio_state_t *state = file->private_data;
- DPRINTK("%s : #### sound_mode = 0x%x\n", __FUNCTION__, state->sound_mode);
- switch (cmd) {
- case SNDCTL_DSP_STEREO:
- if (get_user(val, (int *) arg))
- return -EINVAL;
- state->sound_mode = (val) ? 2 : 1;
- return 0;
- case SNDCTL_DSP_CHANNELS:
- if (get_user(val, (int *) arg))
- return -EINVAL;
- if (val != 1 && val != 2)
- return -EINVAL;
- state->sound_mode = val;
- return put_user(val, (int *) arg);
- case SOUND_PCM_READ_CHANNELS:
- return put_user(state->sound_mode, (long *) arg);
- case SNDCTL_DSP_SPEED:
- ret = get_user(val, (long *) arg);
- if (ret)
- break;
- audio_set_dsp_speed(val, file->f_mode);
- break;
- case SOUND_PCM_READ_RATE:
- ret = put_user(val, (long *) arg);
- break;
- #if 0
- case SNDCTL_DSP_SETFMT:
- case SNDCTL_DSP_GETFMTS:
- /* we can do 16-bit only */
- ret = put_user(AFMT_S16_LE, (long *) arg);
- break;
- #endif
- default:
- /* Maybe this is meant for the mixer (as per OSS Docs) */
- // ret = mixer_ioctl(inode, file, cmd, arg);
- break;
- }
- return ret;
- }
- static void s3c_audio_shutdown(void *dummy)
- {
- unsigned long iiscon;
- /* close I2S port */
- s3c_gpio_cfgpin(S3C_GPD0, S3C_GPD0_INP);
- s3c_gpio_cfgpin(S3C_GPD1, S3C_GPD1_INP);
- s3c_gpio_cfgpin(S3C_GPD2, S3C_GPD2_INP);
- s3c_gpio_cfgpin(S3C_GPD3, S3C_GPD3_INP);
- s3c_gpio_cfgpin(S3C_GPD4, S3C_GPD4_INP);
- s3c_gpio_pullup(S3C_GPD0, 0);
- s3c_gpio_pullup(S3C_GPD1, 0);
- s3c_gpio_pullup(S3C_GPD2, 0);
- s3c_gpio_pullup(S3C_GPD3, 0);
- s3c_gpio_pullup(S3C_GPD4, 0);
- /* deactivate I2S */
- iiscon = readl(S3C_IIS0CON);
- iiscon &= !S3C_IIS0CON_I2SACTIVE;
- writel(iiscon, S3C_IIS0CON);
- DPRINTK("#### IISCON: 0x%08x IISMOD: 0x%08x IISPSR: 0x%08x\n",
- readl(S3C_IIS0CON), readl(S3C_IIS0MOD), readl(S3C_IIS0PSR));
- }
- static int s3c_select_clk(void)
- {
- /* PCLK & SCLK gating enable */
- writel(readl(S3C_PCLK_GATE) | S3C_CLKCON_PCLK_IIS0, S3C_PCLK_GATE);
- writel(readl(S3C_SCLK_GATE) | S3C_CLKCON_SCLK_AUDIO0,
- S3C_SCLK_GATE);
- return 0;
- }
- static int s3c_iis_config_pins(void)
- {
- /*Set I2S port to controll UDA1342 codec */
- s3c_gpio_cfgpin(S3C_GPD0, S3C_GPD0_I2S_CLK0);
- s3c_gpio_cfgpin(S3C_GPD1, S3C_GPD1_I2S_CDCLK0);
- s3c_gpio_cfgpin(S3C_GPD2, S3C_GPD2_I2S_LRCLK0);
- s3c_gpio_cfgpin(S3C_GPD3, S3C_GPD3_I2S_DI0);
- s3c_gpio_cfgpin(S3C_GPD4, S3C_GPD4_I2S_DO0);
- s3c_gpio_pullup(S3C_GPD0, 2);
- s3c_gpio_pullup(S3C_GPD1, 2);
- s3c_gpio_pullup(S3C_GPD2, 2);
- s3c_gpio_pullup(S3C_GPD3, 2);
- s3c_gpio_pullup(S3C_GPD4, 2);
- return 0;
- }
- static audio_stream_t output_stream = {
- id: "s3c64xx audio out ",
- subchannel: DMACH_I2S_OUT,
- };
- static audio_stream_t input_stream = {
- id: "s3c64xx audio in ",
- subchannel: DMACH_I2S_IN,
- };
- static audio_state_t audio_state = {
- .output_stream = &output_stream,
- .input_stream = &input_stream,
- .hw_shutdown = s3c_audio_shutdown,
- .client_ioctl = s3c_audio_ioctl,
- };
- static int s3c_audio_open(struct inode *inode, struct file *file)
- {
- s3c_iis_config_pins();
- s3c_select_clk();
- init_MUTEX(&audio_state.sem);
- return s3c_audio_attach(inode, file, &audio_state);
- }
- static irqreturn_t s3c_iis_irq(int irqno, void *dev_id)
- {
- u32 iiscon;
-
- iiscon = readl(S3C_IIS0CON);
- if((1<<17) & iiscon) {
- writel((1<<17)| iiscon, S3C_IIS0CON);
- }
- printk("%s: %d IISCON = 0x%08x\n",__FUNCTION__, __LINE__,readl(S3C_IIS0CON));
- return IRQ_HANDLED;
- }
- /*
- * Missing fields of this structure will be patched with the call
- * to s3c_audio_attach().
- */
- static struct file_operations s3c_audio_fops = {
- .owner = THIS_MODULE,
- .open = s3c_audio_open,
- };
- static int audio_dev_id, mixer_dev_id;
- static int s3c_audio_probe(struct device *_dev)
- {
- int ret;
- ret = request_irq(IRQ_IIS, s3c_iis_irq, SA_INTERRUPT,
- "s3c2410-iis", NULL);
- if (ret != 0) {
- printk("IIS: cannot claim IRQ\n");
- return 0;
- }
- audio_dev_id = register_sound_dsp(&s3c_audio_fops, -1);
- mixer_dev_id = register_sound_mixer(&uda1341_mixer_fops, -1);
- printk(KERN_INFO "Sound uda1342: dsp id %d mixer id %d\n",
- audio_dev_id, mixer_dev_id);
- flush_scheduled_work();
- return 0;
- }
- static int s3c_audio_remove(struct device *_dev)
- {
- unregister_sound_dsp(audio_dev_id);
- unregister_sound_mixer(mixer_dev_id);
- return 0;
- }
- #ifdef CONFIG_S3C64XX_PM
- static int s3c64xx_audio_suspend( u32 state)
- {
- return s3c_audio_suspend(&audio_state, state, SUSPEND_POWER_DOWN);
- }
- static int s3c64xx_audio_resume()
- {
- return s3c64xx_audio_resume(&audio_state, RESUME_ENABLE);
- }
- #endif
- static struct device_driver s3c_iis_driver = {
- .name = "s3c2410-iis",
- .bus = &platform_bus_type,
- .probe = s3c_audio_probe,
- .remove = s3c_audio_remove,
- #ifdef CONFIG_S3C64XX_PM
- .suspend = s3c64xx_audio_suspend,
- .resume = s3c64xx_audio_resume,
- #endif
- };
- static int __init s3c_uda1341_init(void)
- {
- DPRINTK("Sound: %s installed\n", __FUNCTION__);
- return driver_register(&s3c_iis_driver);
- }
- static void s3c_uda1341_exit(void)
- {
- driver_unregister(&s3c_iis_driver);
- }
- module_init(s3c_uda1341_init);
- module_exit(s3c_uda1341_exit);
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