- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/fs.h>
- #include <linux/delay.h>
- #include <linux/poll.h>
- #include <linux/interrupt.h>
- #include <linux/sound.h>
- #include <linux/soundcard.h>
- #include <linux/clk.h>
- #include <linux/platform_device.h>
- #include <linux/pm.h>
- #include <linux/wait.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <asm/hardware.h>
- #include <asm/semaphore.h>
- #include <asm/dma.h>
- #include <asm/arch/dma.h>
- #include <asm/arch/regs-gpio.h>
- #include <asm/plat-s3c24xx/clock.h>
- #include <asm/arch/regs-clock.h>
- #include <linux/dma-mapping.h>
- #include <asm/arch/hardware.h>
- #include <asm/arch/map.h>
- #include <asm/arch/regs-iis.h>
- #include <asm/plat-s3c24xx/devs.h>
- #define PFX "s3c2410-uda1341-superlp: "
- #define RESSIZE(ressource) (((ressource)->end - (ressource)->start)+1)
- #define MAX_DMA_CHANNELS 0
- #define L3MODE S3C2410_GPB2
- #define L3MODE_OUTP S3C2410_GPB2_OUTP
- #define L3CLOCK S3C2410_GPB4
- #define L3CLOCK_OUTP S3C2410_GPB4_OUTP
- #define L3DATA S3C2410_GPB3
- #define L3DATA_OUTP S3C2410_GPB3_OUTP
- /* The S3C2410 has four internal DMA channels. */
- #define MAX_S3C2410_DMA_CHANNELS S3C2410_DMA_CHANNELS
- #define DMA_CH1 DMACH_I2S_IN
- #define DMA_CH2 DMACH_I2S_OUT
- #define DMA_BUF_WR 1
- #define DMA_BUF_RD 0
- #define dma_wrreg(chan, reg, val) writel((val), (chan)->regs + (reg))
- /************************* add by lfc **************************/
- #define UData(Data) (Data)
- /*
- * MACRO: Fld
- *
- * Purpose
- * The macro "Fld" encodes a bit field, given its size and its shift value
- * with respect to bit 0.
- *
- * Note
- * A more intuitive way to encode bit fields would have been to use their
- * mask. However, extracting size and shift value information from a bit
- * field's mask is cumbersome and might break the assembler (255-character
- * line-size limit).
- *
- * Input
- * Size Size of the bit field, in number of bits.
- * Shft Shift value of the bit field with respect to bit 0.
- *
- * Output
- * Fld Encoded bit field.
- */
- #define Fld(Size, Shft) (((Size) << 16) + (Shft))
- /*
- * MACROS: FSize, FShft, FMsk, FAlnMsk, F1stBit
- *
- * Purpose
- * The macros "FSize", "FShft", "FMsk", "FAlnMsk", and "F1stBit" return
- * the size, shift value, mask, aligned mask, and first bit of a
- * bit field.
- *
- * Input
- * Field Encoded bit field (using the macro "Fld").
- *
- * Output
- * FSize Size of the bit field, in number of bits.
- * FShft Shift value of the bit field with respect to bit 0.
- * FMsk Mask for the bit field.
- * FAlnMsk Mask for the bit field, aligned on bit 0.
- * F1stBit First bit of the bit field.
- */
- #define FSize(Field) ((Field) >> 16)
- #define FShft(Field) ((Field) & 0x0000FFFF)
- /*
- * MACRO: FInsrt
- *
- * Purpose
- * The macro "FInsrt" inserts a value into a bit field by shifting the
- * former appropriately.
- *
- * Input
- * Value Bit-field value.
- * Field Encoded bit field (using the macro "Fld").
- *
- * Output
- * FInsrt Bit-field value positioned appropriately.
- */
- #define FInsrt(Value, Field) (UData (Value) << FShft (Field))
- #define fIISPSR_A Fld(5, 5) /* Prescaler Control A */
- #define IISPSR_A(x) FInsrt((x), fIISPSR_A)
- #define fIISPSR_B Fld(5, 0) /* Prescaler Control B */
- #define IISPSR_B(x) FInsrt((x), fIISPSR_B)
- /**************************** end add **************************/
- static struct clk *iis_clock;
- static void __iomem *iis_base;
- static struct s3c2410_dma_client s3c2410iis_dma_out= {
- .name = "I2SSDO",
- };
- static struct s3c2410_dma_client s3c2410iis_dma_in = {
- .name = "I2SSDI",
- };
- //#define DEBUG
- #ifdef DEBUG
- #define DPRINTK printk
- #else
- #define DPRINTK( x... )
- #endif
- static void init_s3c2410_iis_bus_rx(void);
- static void init_s3c2410_iis_bus_tx(void);
- #define DEF_VOLUME 80
- /* UDA1341 Register bits */
- #define UDA1341_ADDR 0x14
- #define UDA1341_REG_DATA0 (UDA1341_ADDR + 0)
- #define UDA1341_REG_STATUS (UDA1341_ADDR + 2)
- /* status control */
- #define STAT0 (0x00)
- #define STAT0_RST (1 << 6)
- #define STAT0_SC_MASK (3 << 4)
- #define STAT0_SC_512FS (0 << 4)
- #define STAT0_SC_384FS (1 << 4)
- #define STAT0_SC_256FS (2 << 4)
- #define STAT0_IF_MASK (7 << 1)
- #define STAT0_IF_I2S (0 << 1)
- #define STAT0_IF_LSB16 (1 << 1)
- #define STAT0_IF_LSB18 (2 << 1)
- #define STAT0_IF_LSB20 (3 << 1)
- #define STAT0_IF_MSB (4 << 1)
- #define STAT0_IF_LSB16MSB (5 << 1)
- #define STAT0_IF_LSB18MSB (6 << 1)
- #define STAT0_IF_LSB20MSB (7 << 1)
- #define STAT0_DC_FILTER (1 << 0)
- #define STAT0_DC_NO_FILTER (0 << 0)
- #define STAT1 (0x80)
- #define STAT1_DAC_GAIN (1 << 6) /* gain of DAC */
- #define STAT1_ADC_GAIN (1 << 5) /* gain of ADC */
- #define STAT1_ADC_POL (1 << 4) /* polarity of ADC */
- #define STAT1_DAC_POL (1 << 3) /* polarity of DAC */
- #define STAT1_DBL_SPD (1 << 2) /* double speed playback */
- #define STAT1_ADC_ON (1 << 1) /* ADC powered */
- #define STAT1_DAC_ON (1 << 0) /* DAC powered */
- /* data0 direct control */
- #define DATA0 (0x00)
- #define DATA0_VOLUME_MASK (0x3f)
- #define DATA0_VOLUME(x) (x)
- #define DATA1 (0x40)
- #define DATA1_BASS(x) ((x) << 2)
- #define DATA1_BASS_MASK (15 << 2)
- #define DATA1_TREBLE(x) ((x))
- #define DATA1_TREBLE_MASK (3)
- #define DATA2 (0x80)
- #define DATA2_PEAKAFTER (0x1 << 5)
- #define DATA2_DEEMP_NONE (0x0 << 3)
- #define DATA2_DEEMP_32KHz (0x1 << 3)
- #define DATA2_DEEMP_44KHz (0x2 << 3)
- #define DATA2_DEEMP_48KHz (0x3 << 3)
- #define DATA2_MUTE (0x1 << 2)
- #define DATA2_FILTER_FLAT (0x0 << 0)
- #define DATA2_FILTER_MIN (0x1 << 0)
- #define DATA2_FILTER_MAX (0x3 << 0)
- /* data0 extend control */
- #define EXTADDR(n) (0xc0 | (n))
- #define EXTDATA(d) (0xe0 | (d))
- #define EXT0 0
- #define EXT0_CH1_GAIN(x) (x)
- #define EXT1 1
- #define EXT1_CH2_GAIN(x) (x)
- #define EXT2 2
- #define EXT2_MIC_GAIN_MASK (7 << 2)
- #define EXT2_MIC_GAIN(x) ((x) << 2)
- #define EXT2_MIXMODE_DOUBLEDIFF (0)
- #define EXT2_MIXMODE_CH1 (1)
- #define EXT2_MIXMODE_CH2 (2)
- #define EXT2_MIXMODE_MIX (3)
- #define EXT4 4
- #define EXT4_AGC_ENABLE (1 << 4)
- #define EXT4_INPUT_GAIN_MASK (3)
- #define EXT4_INPUT_GAIN(x) ((x) & 3)
- #define EXT5 5
- #define EXT5_INPUT_GAIN(x) ((x) >> 2)
- #define EXT6 6
- #define EXT6_AGC_CONSTANT_MASK (7 << 2)
- #define EXT6_AGC_CONSTANT(x) ((x) << 2)
- #define EXT6_AGC_LEVEL_MASK (3)
- #define EXT6_AGC_LEVEL(x) (x)
- #define AUDIO_NAME "UDA1341"
- #define AUDIO_NAME_VERBOSE "UDA1341 audio driver"
- #define AUDIO_FMT_MASK (AFMT_S16_LE)
- #define AUDIO_FMT_DEFAULT (AFMT_S16_LE)
- #define AUDIO_CHANNELS_DEFAULT 2
- #define AUDIO_RATE_DEFAULT 44100
- #define AUDIO_NBFRAGS_DEFAULT 8
- #define AUDIO_FRAGSIZE_DEFAULT 8192
- #define S_CLOCK_FREQ 384
- #define PCM_ABS(a) (a < 0 ? -a : a)
- typedef struct {
- int size; /* buffer size */
- char *start; /* point to actual buffer */
- dma_addr_t dma_addr; /* physical buffer address */
- struct semaphore sem; /* down before touching the buffer */
- atomic_t count;
- wait_queue_head_t wait;
- int master; /* owner for buffer allocation, contain size when true */
- } audio_buf_t;
- typedef struct {
- audio_buf_t *buffers; /* pointer to audio buffer structures */
- audio_buf_t *buf; /* current buffer used by read/write */
- u_int buf_idx; /* index for the pointer above */
- u_int fragsize; /* fragment i.e. buffer size */
- u_int nbfrags; /* nbr of fragments */
- dmach_t dma_ch; /* DMA channel (channel2 for audio) */
- u_int dma_ok;
- } audio_stream_t;
- /*
- * 驱动对于内存是这样使用的:
- * 把buffers所指向的内存分成nbfragsxfragsize的空间(每一块的大小为fragsize,供分成nbfrags块)
- * buf指向当前所使用的内存块,buf_idx只是内存块序号
- */
- static audio_stream_t output_stream;
- static audio_stream_t input_stream; /* input */
- #define NEXT_BUF(_s_,_b_) { \
- (_s_)->_b_##_idx++; \
- (_s_)->_b_##_idx %= (_s_)->nbfrags; \
- (_s_)->_b_ = (_s_)->buffers + (_s_)->_b_##_idx; }
- static u_int audio_rate;
- static int audio_channels;
- static int audio_fmt;
- static u_int audio_fragsize;
- static u_int audio_nbfrags;
- static int audio_rd_refcount;
- static int audio_wr_refcount;
- #define audio_active (audio_rd_refcount | audio_wr_refcount)
- static int audio_dev_dsp;
- static int audio_dev_mixer;
- static int audio_mix_modcnt;
- static int uda1341_volume;
- //static u8 uda_sampling;
- static int uda1341_boost;
- static int uda1341_treble;
- static int mixer_igain=0x4; /* -6db*/
- static void uda1341_l3_address(u8 data)
- {
- int i;
- unsigned long flags;
- local_irq_save(flags);
- s3c2410_gpio_setpin(L3MODE,0);
- s3c2410_gpio_setpin(L3CLOCK,1);
- udelay(1);
- for (i = 0; i < 8; i++)
- {
- if (data & 0x1)
- {
- s3c2410_gpio_setpin(L3CLOCK,0);
- s3c2410_gpio_setpin(L3DATA,1);
- udelay(1);
- s3c2410_gpio_setpin(L3CLOCK,1);
- }else {
- s3c2410_gpio_setpin(L3CLOCK,0);
- s3c2410_gpio_setpin(L3DATA,0);
- udelay(1);
- s3c2410_gpio_setpin(L3CLOCK,1);
- }
- data >>= 1;
- }
- s3c2410_gpio_setpin(L3MODE,1);
- s3c2410_gpio_setpin(L3CLOCK,1);
- local_irq_restore(flags);
- }
- static void uda1341_l3_data(u8 data)
- {
- int i;
- unsigned long flags;
- local_irq_save(flags);
- udelay(1);
- for (i = 0; i < 8; i++)
- {
- if (data & 0x1)
- {
- s3c2410_gpio_setpin(L3CLOCK,0);
- s3c2410_gpio_setpin(L3DATA,1);
- udelay(1);
- s3c2410_gpio_setpin(L3CLOCK,1);
- } else {
- s3c2410_gpio_setpin(L3CLOCK,0);
- s3c2410_gpio_setpin(L3DATA,0);
- udelay(1);
- s3c2410_gpio_setpin(L3CLOCK,1);
- }
- data >>= 1;
- }
- local_irq_restore(flags);
- }
- static void audio_clear_buf(audio_stream_t * s)
- {
- DPRINTK("audio_clear_buf\n");
- if(s->dma_ok)
- s3c2410_dma_ctrl(s->dma_ch, S3C2410_DMAOP_FLUSH);
- if (s->buffers) {
- int frag;
- for (frag = 0; frag < s->nbfrags; frag++) {
- if (!s->buffers[frag].master)
- continue;
- dma_free_coherent(NULL,
- s->buffers[frag].master,
- s->buffers[frag].start,
- s->buffers[frag].dma_addr);
- }
- kfree(s->buffers);
- s->buffers = NULL;
- }
- s->buf_idx = 0;
- s->buf = NULL;
- }
- static int audio_setup_buf(audio_stream_t * s)
- {
- int frag;
- int dmasize = 0;
- char *dmabuf = 0;
- dma_addr_t dmaphys = 0;
- DPRINTK("audio_setup_buf\n");
- if (s->buffers)
- return -EBUSY;
- s->nbfrags = audio_nbfrags;
- s->fragsize = audio_fragsize;
- s->buffers = (audio_buf_t *)
- kmalloc(sizeof(audio_buf_t) * s->nbfrags, GFP_KERNEL);
- if (!s->buffers)
- goto err;
- memset(s->buffers, 0, sizeof(audio_buf_t) * s->nbfrags);
- for (frag = 0; frag < s->nbfrags; frag++) {
- audio_buf_t *b = &s->buffers[frag];
- if (!dmasize) {
- dmasize = (s->nbfrags - frag) * s->fragsize;
- do {
- dmabuf = dma_alloc_coherent(NULL, dmasize, &dmaphys, GFP_KERNEL|GFP_DMA);
- if (!dmabuf)
- dmasize -= s->fragsize;
- } while (!dmabuf && dmasize);
- if (!dmabuf)
- goto err;
- b->master = dmasize;
- }
- b->start = dmabuf;
- b->dma_addr = dmaphys;
- sema_init(&b->sem, 1);
- atomic_set(&b->count, 1);
- init_waitqueue_head(&b->wait);
- DPRINTK("buf %d: start %p dma %d\n", frag, b->start, b->dma_addr);
- dmabuf += s->fragsize;
- dmaphys += s->fragsize;
- dmasize -= s->fragsize;
- }
- s->buf_idx = 0;
- s->buf = &s->buffers[0];
- return 0;
- err:
- printk(AUDIO_NAME ": unable to allocate audio memory\n ");
- audio_clear_buf(s);
- return -ENOMEM;
- }
- static void audio_dmaout_done_callback(struct s3c2410_dma_chan *ch, void *buf, int size, enum s3c2410_dma_buffresult result)
- {
- audio_buf_t *b = (audio_buf_t *) buf;
- DPRINTK("audio_dmaout_done_callback\n");
- up(&b->sem);
- wake_up(&b->wait);
- }
- static void audio_dmain_done_callback(struct s3c2410_dma_chan *ch, void *buf, int size, enum s3c2410_dma_buffresult result)
- {
- audio_buf_t *b = (audio_buf_t *) buf;
- DPRINTK("audio_dmain_done_callback\n");
- b->size = size;
- up(&b->sem);
- wake_up(&b->wait);
- }
- /* using when write */
- static int audio_sync(struct file *file)
- {
- audio_stream_t *s = &output_stream;
- audio_buf_t *b = s->buf;
- DPRINTK("audio_sync\n");
- if (!s->buffers)
- return 0;
- if (b->size != 0) {
- down(&b->sem);
- s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, b->size);
- b->size = 0;
- NEXT_BUF(s, buf);
- }
- b = s->buffers + ((s->nbfrags + s->buf_idx - 1) % s->nbfrags);
- if (down_interruptible(&b->sem))
- return -EINTR;
- up(&b->sem);
- return 0;
- }
- static inline int copy_from_user_mono_stereo(char *to, const char *from, int count)
- {
- u_int *dst = (u_int *)to;
- const char *end = from + count;
- DPRINTK("copy_from_user_mono_stereo\n");
- if (access_ok(VERIFY_READ, from, count))
- return -EFAULT;
- if ((int)from & 0x2) {
- u_int v;
- __get_user(v, (const u_short *)from); from += 2;
- *dst++ = v | (v << 16);
- }
- while (from < end-2) {
- u_int v, x, y;
- __get_user(v, (const u_int *)from); from += 4;
- x = v << 16;
- x |= x >> 16;
- y = v >> 16;
- y |= y << 16;
- *dst++ = x;
- *dst++ = y;
- }
- if (from < end) {
- u_int v;
- __get_user(v, (const u_short *)from);
- *dst = v | (v << 16);
- }
- return 0;
- }
- static ssize_t smdk2410_audio_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
- {
- const char *buffer0 = buffer;
- audio_stream_t *s = &output_stream;
- int chunksize, ret = 0;
- DPRINTK("audio_write : start count=%d\n", count);
- switch (file->f_flags & O_ACCMODE) {
- case O_WRONLY:
- case O_RDWR:
- break;
- default:
- DPRINTK("EPERM\n");
- return -EPERM;
- }
- if (!s->buffers && audio_setup_buf(s)){
- DPRINTK("ENOMEM\n");
- return -ENOMEM;
- }
- count &= ~0x03;
- while (count > 0) {
- audio_buf_t *b = s->buf;
- if (file->f_flags & O_NONBLOCK) {
- ret = -EAGAIN;
- if (down_trylock(&b->sem)){
- DPRINTK("down_trylock error\n");
- break;
- }
- } else {
- ret = -ERESTARTSYS;
- if (down_interruptible(&b->sem)){
- DPRINTK("down_interruptible error\n");
- break;
- }
- }
- if (audio_channels == 2) {
- chunksize = s->fragsize - b->size;//当前内存块可供使用空间
- if (chunksize > count)
- chunksize = count;
- DPRINTK("write %d to %d\n", chunksize, s->buf_idx);
- if (copy_from_user(b->start + b->size, buffer, chunksize)) {
- DPRINTK("copy_from_user error\n");
- up(&b->sem);
- return -EFAULT;
- }
- b->size += chunksize;//更新当前内存块的使用情况
- } else {
- chunksize = (s->fragsize - b->size) >> 1;
- if (chunksize > count)
- chunksize = count;
- DPRINTK("write %d to %d\n", chunksize*2, s->buf_idx);
- if (copy_from_user_mono_stereo(b->start + b->size, buffer, chunksize)) {
- DPRINTK("copy_from_user_mono_stereo error\n");
- up(&b->sem);
- return -EFAULT;
- }
- b->size += chunksize*2;
- }
- buffer += chunksize;
- count -= chunksize;
- if (b->size < s->fragsize) {
- up(&b->sem);
- break;
- }
- /* 填满一块内存就交给dma去处理 */
- if((ret = s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, b->size))) {
- printk("dma enqueue failed.\n");
- return ret;
- }
- /* 把内存块加入dma队列后继续填写下一内存块 */
- b->size = 0;
- NEXT_BUF(s, buf);
- }
- if ((buffer - buffer0))
- ret = buffer - buffer0;//返回已传输的字节数
- DPRINTK("audio_write : end count=%d\n\n", ret);
- return ret;
- }
- static ssize_t smdk2410_audio_read(struct file *file, char *buffer, size_t count, loff_t * ppos)
- {
- const char *buffer0 = buffer;
- audio_stream_t *s = &input_stream;
- int chunksize, ret = 0;
- DPRINTK("audio_read: count=%d\n", count);
- /*
- if (ppos != &file->f_pos)
- return -ESPIPE;
- */
- if (!s->buffers) {
- int i;
- if (audio_setup_buf(s))
- return -ENOMEM;
- for (i = 0; i < s->nbfrags; i++) {
- audio_buf_t *b = s->buf;
- down(&b->sem);
- s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, s->fragsize);
- NEXT_BUF(s, buf);
- }
- }
- while (count > 0) {
- audio_buf_t *b = s->buf;
- /* Wait for a buffer to become full */
- if (file->f_flags & O_NONBLOCK) {
- ret = -EAGAIN;
- if (down_trylock(&b->sem))
- break;
- } else {
- ret = -ERESTARTSYS;
- if (down_interruptible(&b->sem))
- break;
- }
- chunksize = b->size;
- if (chunksize > count)
- chunksize = count;
- DPRINTK("read %d from %d\n", chunksize, s->buf_idx);
- if (copy_to_user(buffer, b->start + s->fragsize - b->size, chunksize)) {
- up(&b->sem);
- return -EFAULT;
- }
- b->size -= chunksize;
- buffer += chunksize;
- count -= chunksize;
- if (b->size > 0) {
- up(&b->sem);
- break;
- }
- /* Make current buffer available for DMA again */
- s3c2410_dma_enqueue(s->dma_ch, (void *) b, b->dma_addr, s->fragsize);
- NEXT_BUF(s, buf);
- }
- if ((buffer - buffer0))
- ret = buffer - buffer0;
- // DPRINTK("audio_read: return=%d\n", ret);
- return ret;
- }
- static unsigned int smdk2410_audio_poll(struct file *file,struct poll_table_struct *wait)
- {
- unsigned int mask = 0;
- int i;
- DPRINTK("audio_poll(): mode=%s\n", (file->f_mode & FMODE_WRITE) ? "w" : "");
- if (file->f_mode & FMODE_READ) {
- if (!input_stream.buffers && audio_setup_buf(&input_stream))
- return -ENOMEM;
- poll_wait(file, &input_stream.buf->wait, wait);
- for (i = 0; i < input_stream.nbfrags; i++) {
- if (atomic_read(&input_stream.buffers[i].count) > 0)
- mask |= POLLIN | POLLWRNORM;
- break;
- }
- }
- if (file->f_mode & FMODE_WRITE) {
- if (!output_stream.buffers && audio_setup_buf(&output_stream))
- return -ENOMEM;
- poll_wait(file, &output_stream.buf->wait, wait);
- for (i = 0; i < output_stream.nbfrags; i++) {
- if (atomic_read(&output_stream.buffers[i].count) > 0)
- mask |= POLLOUT | POLLWRNORM;
- break;
- }
- }
- DPRINTK("audio_poll() returned mask of %s\n",(mask & POLLOUT) ? "w" : "");
- return mask;
- }
- static loff_t smdk2410_audio_llseek(struct file *file, loff_t offset, int origin)
- {
- DPRINTK("smdk2410_audio_llseek\n");
- return -ESPIPE;
- }
- static int smdk2410_mixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
- {
- int ret;
- long val = 0;
- DPRINTK("smdk2410_mixer_ioctl\n");
- switch (cmd) {
- case SOUND_MIXER_INFO:
- {
- mixer_info info;
- strncpy(info.id, "UDA1341", sizeof(info.id));
- strncpy(info.name,"Philips UDA1341", sizeof(info.name));
- info.modify_counter = audio_mix_modcnt;
- return copy_to_user((void *)arg, &info, sizeof(info));
- }
- case SOUND_OLD_MIXER_INFO:
- {
- _old_mixer_info info;
- strncpy(info.id, "UDA1341", sizeof(info.id));
- strncpy(info.name,"Philips UDA1341", sizeof(info.name));
- return copy_to_user((void *)arg, &info, sizeof(info));
- }
- case SOUND_MIXER_READ_STEREODEVS:
- return put_user(0, (long *) arg);
- case SOUND_MIXER_READ_CAPS:
- val = SOUND_CAP_EXCL_INPUT;
- return put_user(val, (long *) arg);
- case SOUND_MIXER_WRITE_VOLUME:
- ret = get_user(val, (long *) arg);
- if (ret)
- return ret;
- uda1341_volume = 63 - (((val & 0xff) + 1) * 63) / 100;
- uda1341_l3_address(UDA1341_REG_DATA0);
- uda1341_l3_data(uda1341_volume);
- break;
- case SOUND_MIXER_READ_VOLUME:
- val = ((63 - uda1341_volume) * 100) / 63;
- val |= val << 8;
- return put_user(val, (long *) arg);
- case SOUND_MIXER_READ_IGAIN:
- val = ((31- mixer_igain) * 100) / 31;
- return put_user(val, (int *) arg);
- case SOUND_MIXER_WRITE_IGAIN:
- ret = get_user(val, (int *) arg);
- if (ret)
- return ret;
- mixer_igain = 31 - (val * 31 / 100);
- /* use mixer gain channel 1*/
- uda1341_l3_address(UDA1341_REG_DATA0);
- uda1341_l3_data(EXTADDR(EXT0));
- uda1341_l3_data(EXTDATA(EXT0_CH1_GAIN(mixer_igain)));
- break;
- default:
- DPRINTK("mixer ioctl %u unknown\n", cmd);
- return -ENOSYS;
- }
- audio_mix_modcnt++;
- return 0;
- }
- static int iispsr_value(int s_bit_clock, int sample_rate)
- {
- int i, prescaler = 0;
- unsigned long tmpval;
- unsigned long tmpval384;
- unsigned long tmpval384min = 0xffff;
- tmpval384 = clk_get_rate(iis_clock) / s_bit_clock;
- for (i = 0; i < 32; i++) {
- tmpval = tmpval384/(i+1);
- if (PCM_ABS((sample_rate - tmpval)) < tmpval384min) {
- tmpval384min = PCM_ABS((sample_rate - tmpval));
- prescaler = i;
- }
- }
- DPRINTK("prescaler = %d\n", prescaler);
- return prescaler;
- }
- static long audio_set_dsp_speed(long val)
- {
- unsigned int prescaler;
- prescaler=(IISPSR_A(iispsr_value(S_CLOCK_FREQ, val))
- | IISPSR_B(iispsr_value(S_CLOCK_FREQ, val)));
- writel(prescaler, iis_base + S3C2410_IISPSR);
- printk(PFX "audio_set_dsp_speed:%ld prescaler:%i\n",val,prescaler);
- return (audio_rate = val);
- }
- static int smdk2410_audio_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
- {
- long val;
- DPRINTK("smdk2410_audio_ioctl\n");
- switch (cmd) {
- case SNDCTL_DSP_SETFMT:
- get_user(val, (long *) arg);
- if (val & AUDIO_FMT_MASK) {
- audio_fmt = val;
- break;
- }
- else
- return -EINVAL;
- case SNDCTL_DSP_CHANNELS:
- case SNDCTL_DSP_STEREO:
- get_user(val, (long *) arg);
- if (cmd == SNDCTL_DSP_STEREO)
- val = val ? 2 : 1;
- if (val != 1 && val != 2)
- return -EINVAL;
- DPRINTK("audio_channels set to %d\n", val);
- audio_channels = val;
- break;
- case SOUND_PCM_READ_CHANNELS:
- DPRINTK("audio_channels is %d\n", audio_channels);
- put_user(audio_channels, (long *) arg);
- break;
- case SNDCTL_DSP_SPEED:
- get_user(val, (long *) arg);
- val = audio_set_dsp_speed(val);
- if (val < 0)
- return -EINVAL;
- put_user(val, (long *) arg);
- break;
- case SOUND_PCM_READ_RATE:
- put_user(audio_rate, (long *) arg);
- break;
- case SNDCTL_DSP_GETFMTS:
- put_user(AUDIO_FMT_MASK, (long *) arg);
- break;
- case SNDCTL_DSP_GETBLKSIZE:
- if(file->f_mode & FMODE_WRITE)
- return put_user(audio_fragsize, (long *) arg);
- else
- return put_user(audio_fragsize, (int *) arg);
- case SNDCTL_DSP_SETFRAGMENT:
- if (file->f_mode & FMODE_WRITE) {
- if (output_stream.buffers)
- return -EBUSY;
- get_user(val, (long *) arg);
- audio_fragsize = 1 << (val & 0xFFFF);
- if (audio_fragsize < 16)
- audio_fragsize = 16;
- if (audio_fragsize > 16384)
- audio_fragsize = 16384;
- audio_nbfrags = (val >> 16) & 0x7FFF;
- if (audio_nbfrags < 2)
- audio_nbfrags = 2;
- if (audio_nbfrags * audio_fragsize > 128 * 1024)
- audio_nbfrags = 128 * 1024 / audio_fragsize;
- if (audio_setup_buf(&output_stream))
- return -ENOMEM;
- }
- if (file->f_mode & FMODE_READ) {
- if (input_stream.buffers)
- return -EBUSY;
- get_user(val, (int *) arg);
- audio_fragsize = 1 << (val & 0xFFFF);
- if (audio_fragsize < 16)
- audio_fragsize = 16;
- if (audio_fragsize > 16384)
- audio_fragsize = 16384;
- audio_nbfrags = (val >> 16) & 0x7FFF;
- if (audio_nbfrags < 2)
- audio_nbfrags = 2;
- if (audio_nbfrags * audio_fragsize > 128 * 1024)
- audio_nbfrags = 128 * 1024 / audio_fragsize;
- if (audio_setup_buf(&input_stream))
- return -ENOMEM;
- }
- break;
- case SNDCTL_DSP_SYNC:
- return audio_sync(file);
- case SNDCTL_DSP_GETOSPACE:
- {
- audio_stream_t *s = &output_stream;
- audio_buf_info *inf = (audio_buf_info *) arg;
- int err = !access_ok(VERIFY_WRITE, inf, sizeof(*inf));
- int i;
- int frags = 0, bytes = 0;
- if (err)
- return err;
- for (i = 0; i < s->nbfrags; i++) {
- if (atomic_read(&s->buffers[i].count) > 0) {
- if (s->buffers[i].size == 0)
- frags++;
- bytes += s->fragsize - s->buffers[i].size;
- }
- }
- put_user(frags, &inf->fragments);
- put_user(s->nbfrags, &inf->fragstotal);
- put_user(s->fragsize, &inf->fragsize);
- put_user(bytes, &inf->bytes);
- break;
- }
- case SNDCTL_DSP_GETISPACE:
- {
- audio_stream_t *s = &input_stream;
- audio_buf_info *inf = (audio_buf_info *) arg;
- int err = access_ok(VERIFY_WRITE, inf, sizeof(*inf));
- int i;
- int frags = 0, bytes = 0;
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- if (err)
- return err;
- for(i = 0; i < s->nbfrags; i++){
- if (atomic_read(&s->buffers[i].count) > 0)
- {
- if (s->buffers[i].size == s->fragsize)
- frags++;
- bytes += s->buffers[i].size;
- }
- }
- put_user(frags, &inf->fragments);
- put_user(s->nbfrags, &inf->fragstotal);
- put_user(s->fragsize, &inf->fragsize);
- put_user(bytes, &inf->bytes);
- break;
- }
- case SNDCTL_DSP_RESET:
- if (file->f_mode & FMODE_READ) {
- audio_clear_buf(&input_stream);
- }
- if (file->f_mode & FMODE_WRITE) {
- audio_clear_buf(&output_stream);
- }
- return 0;
- case SNDCTL_DSP_NONBLOCK:
- file->f_flags |= O_NONBLOCK;
- return 0;
- case SNDCTL_DSP_POST:
- case SNDCTL_DSP_SUBDIVIDE:
- case SNDCTL_DSP_GETCAPS:
- case SNDCTL_DSP_GETTRIGGER:
- case SNDCTL_DSP_SETTRIGGER:
- case SNDCTL_DSP_GETIPTR:
- case SNDCTL_DSP_GETOPTR:
- case SNDCTL_DSP_MAPINBUF:
- case SNDCTL_DSP_MAPOUTBUF:
- case SNDCTL_DSP_SETSYNCRO:
- case SNDCTL_DSP_SETDUPLEX:
- return -ENOSYS;
- default:
- return smdk2410_mixer_ioctl(inode, file, cmd, arg);
- }
- return 0;
- }
- static int smdk2410_audio_open(struct inode *inode, struct file *file)
- {
- int cold = !audio_active;
- DPRINTK("audio_open\n");
- if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
- if (audio_rd_refcount || audio_wr_refcount)
- return -EBUSY;
- audio_rd_refcount++;
- } else if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
- if (audio_wr_refcount)
- return -EBUSY;
- audio_wr_refcount++;
- } else if ((file->f_flags & O_ACCMODE) == O_RDWR) {
- if (audio_rd_refcount || audio_wr_refcount)
- return -EBUSY;
- audio_rd_refcount++;
- audio_wr_refcount++;
- } else
- return -EINVAL;
- if (cold) {
- audio_rate = AUDIO_RATE_DEFAULT;
- audio_channels = AUDIO_CHANNELS_DEFAULT;
- audio_fragsize = AUDIO_FRAGSIZE_DEFAULT;
- audio_nbfrags = AUDIO_NBFRAGS_DEFAULT;
- if ((file->f_mode & FMODE_WRITE)){
- init_s3c2410_iis_bus_tx();
- audio_clear_buf(&output_stream);
- if (!output_stream .buffers && audio_setup_buf(&output_stream))
- return -ENOMEM;
- }
- if ((file->f_mode & FMODE_READ)){
- init_s3c2410_iis_bus_rx();
- audio_clear_buf(&input_stream);
- }
- }
- return 0;
- }
- static int smdk2410_mixer_open(struct inode *inode, struct file *file)
- {
- DPRINTK("smdk2410_mixer_open\n");
- return 0;
- }
- static int smdk2410_audio_release(struct inode *inode, struct file *file)
- {
- DPRINTK("audio_release\n");
- if (file->f_mode & FMODE_READ) {
- if (audio_rd_refcount == 1)
- audio_clear_buf(&input_stream);
- audio_rd_refcount = 0;
- }
- if(file->f_mode & FMODE_WRITE) {
- if (audio_wr_refcount == 1) {
- audio_sync(file);
- audio_clear_buf(&output_stream);
- audio_wr_refcount = 0;
- }
- }
- return 0;
- }
- static int smdk2410_mixer_release(struct inode *inode, struct file *file)
- {
- DPRINTK("smdk2410_mixer_release\n");
- return 0;
- }
- static struct file_operations smdk2410_audio_fops = {
- llseek: smdk2410_audio_llseek,
- write: smdk2410_audio_write,
- read: smdk2410_audio_read,
- poll: smdk2410_audio_poll,
- ioctl: smdk2410_audio_ioctl,
- open: smdk2410_audio_open,
- release: smdk2410_audio_release
- };
- static struct file_operations smdk2410_mixer_fops = {
- ioctl: smdk2410_mixer_ioctl,
- open: smdk2410_mixer_open,
- release: smdk2410_mixer_release
- };
- static void init_uda1341(void)
- {
- /* GPB 4: L3CLOCK */
- /* GPB 3: L3DATA */
- /* GPB 2: L3MODE */
- unsigned long flags;
- DPRINTK("init_uda1341\n");
- uda1341_volume = 62 - ((DEF_VOLUME * 61) / 100);
- uda1341_boost = 0;
- // uda_sampling = DATA2_DEEMP_NONE;
- // uda_sampling &= ~(DATA2_MUTE);
- local_irq_save(flags);
- s3c2410_gpio_setpin(L3MODE,1);//L3MODE=1
- s3c2410_gpio_setpin(L3CLOCK,1);//L3CLOCK=1
- local_irq_restore(flags);
- uda1341_l3_address(UDA1341_REG_STATUS);
- uda1341_l3_data(0x40 | STAT0_SC_384FS | STAT0_IF_MSB|STAT0_DC_FILTER); // reset uda1341
- uda1341_l3_data(STAT1 | STAT1_ADC_ON | STAT1_DAC_ON);
- uda1341_l3_address(UDA1341_REG_DATA0);
- // uda1341_l3_data(DATA0 |DATA0_VOLUME(0x0)); // maximum volume
- uda1341_l3_data(DATA0 | DATA0_VOLUME(uda1341_volume));//lfc
- uda1341_l3_data(DATA1 |DATA1_BASS(uda1341_boost)| DATA1_TREBLE(0));
- uda1341_l3_data((DATA2 |DATA2_DEEMP_NONE) &~(DATA2_MUTE));
- uda1341_l3_data(EXTADDR(EXT2));
- uda1341_l3_data(EXTDATA(EXT2_MIC_GAIN(0x6)) | EXT2_MIXMODE_CH1);//input channel 1 select(input channel 2 off)
- }
- static void init_s3c2410_iis_bus(void){
- DPRINTK("init_s3c2410_iis_bus\n");
- writel(0, iis_base + S3C2410_IISPSR);
- writel(0, iis_base + S3C2410_IISCON);
- writel(0, iis_base + S3C2410_IISMOD);
- writel(0, iis_base + S3C2410_IISFCON);
- clk_disable(iis_clock);
- }
- static void init_s3c2410_iis_bus_rx(void)
- {
- unsigned int iiscon, iismod, iisfcon;
- char *dstr;
- DPRINTK("init_s3c2410_iis_bus_rx\n");
- //Kill everything...
- writel(0, iis_base + S3C2410_IISPSR);
- writel(0, iis_base + S3C2410_IISCON);
- writel(0, iis_base + S3C2410_IISMOD);
- writel(0, iis_base + S3C2410_IISFCON);
- clk_enable(iis_clock);
- iiscon = iismod = iisfcon = 0;
- //Setup basic stuff
- iiscon |= S3C2410_IISCON_PSCEN; // Enable prescaler
- // iismod |= S3C2410_IISMOD_MASTER; // Set interface to Master Mode
- iismod |= S3C2410_IISMOD_LR_LLOW; // Low for left channel
- iismod |= S3C2410_IISMOD_MSB; // IIS format
- iismod |= S3C2410_IISMOD_16BIT; // Serial data bit/channel is 16 bit
- iismod |= S3C2410_IISMOD_384FS; // Master clock freq = 384 fs
- iismod |= S3C2410_IISMOD_32FS; // 32 fs
- iisfcon|= S3C2410_IISFCON_RXDMA | S3C2410_IISFCON_RXENABLE; //Set RX FIFO acces mode to DMA
- //iisfcon|= S3C2410_IISFCON_TXDMA; //Set RX FIFO acces mode to DMA
- iiscon |= S3C2410_IISCON_RXDMAEN | S3C2410_IISCON_IISEN; //Enable RX DMA service request
- //iiscon |= S3C2410_IISCON_TXIDLE; //Set TX channel idle
- iiscon &= (~S3C2410_IISCON_RXIDLE);
- iismod |= S3C2410_IISMOD_RXMODE; //Set RX Mode
- iismod |= S3C2410_IISMOD_TXMODE;
- dstr="RX";
- //setup the prescaler
- audio_set_dsp_speed(audio_rate);
- //iiscon has to be set last - it enables the interface
- writel(iismod, iis_base + S3C2410_IISMOD);
- writel(iisfcon, iis_base + S3C2410_IISFCON);
- writel(iiscon, iis_base + S3C2410_IISCON);
- }
- static void init_s3c2410_iis_bus_tx(void)
- {
- unsigned int iiscon, iismod, iisfcon;
- char *dstr;
- DPRINTK("init_s3c2410_iis_bus_tx\n");
- //Kill everything...
- writel(0, iis_base + S3C2410_IISPSR);
- writel(0, iis_base + S3C2410_IISCON);
- writel(0, iis_base + S3C2410_IISMOD);
- writel(0, iis_base + S3C2410_IISFCON);
- clk_enable(iis_clock);
- iiscon = iismod = iisfcon = 0;
- //Setup basic stuff
- iiscon |= S3C2410_IISCON_PSCEN; // Enable prescaler
- //iismod |= S3C2410_IISMOD_MASTER; // Set interface to Master Mode
- iismod |= S3C2410_IISMOD_LR_LLOW; // Low for left channel
- iismod |= S3C2410_IISMOD_MSB; // MSB format
- iismod |= S3C2410_IISMOD_16BIT; // Serial data bit/channel is 16 bit
- iismod |= S3C2410_IISMOD_384FS; // Master clock freq = 384 fs
- iismod |= S3C2410_IISMOD_32FS; // 32 fs
- iisfcon|= S3C2410_IISFCON_RXDMA; //Set RX FIFO acces mode to DMA
- iisfcon|= S3C2410_IISFCON_TXDMA; //Set TX FIFO acces mode to DMA
- iiscon |= S3C2410_IISCON_TXDMAEN | S3C2410_IISCON_IISEN; //Enable TX DMA service request
- //iiscon |= S3C2410_IISCON_RXIDLE; //Set RX channel idle
- iiscon &= ~S3C2410_IISCON_TXIDLE;
- iismod |= S3C2410_IISMOD_TXMODE; //Set TX Mode
- iismod |= S3C2410_IISMOD_RXMODE;
- iisfcon|= S3C2410_IISFCON_TXENABLE; //Enable TX Fifo
- dstr="TX";
- //setup the prescaler
- audio_set_dsp_speed(audio_rate);
- //iiscon has to be set last - it enables the interface
- writel(iismod, iis_base + S3C2410_IISMOD);
- writel(iisfcon, iis_base + S3C2410_IISFCON);
- writel(iiscon, iis_base + S3C2410_IISCON);
- }
- static int __init audio_init_dma(audio_stream_t * s, char *desc)
- {
- int ret ;
- enum s3c2410_dmasrc source;
- int hwcfg;
- unsigned long devaddr;
- int dcon;
- unsigned int flags = 0;
- dmach_t channel = 2;
- DPRINTK("audio_init_dma\n");
- if(s->dma_ch == DMA_CH2){
- source = S3C2410_DMASRC_MEM;
- hwcfg = 3;
- devaddr = 0x55000010;
- dcon = (1<<31) | (0<<30) | (0<<24);
- flags = S3C2410_DMAF_AUTOSTART;
- ret = s3c2410_dma_request(s->dma_ch, &s3c2410iis_dma_out, NULL);
- if (ret) {
- printk(KERN_ERR "failed to get dma channel\n");
- return ret;
- }
- s3c2410_dma_devconfig(s->dma_ch, source, hwcfg, devaddr);
- s3c2410_dma_config(s->dma_ch, 2, dcon);
- s3c2410_dma_set_buffdone_fn(s->dma_ch, audio_dmaout_done_callback);
- s3c2410_dma_setflags(s->dma_ch, flags);
- s->dma_ok = 1;
- return ret;
- }
- else if(s->dma_ch == DMA_CH1){
- source =S3C2410_DMASRC_HW;
- hwcfg =3;
- devaddr = 0x55000010;
- dcon = (1<<31) | (1<<23) | (2<<24);
- flags = S3C2410_DMAF_AUTOSTART;
- ret = s3c2410_dma_request(s->dma_ch, &s3c2410iis_dma_in, NULL);
- if (ret) {
- printk(KERN_ERR "failed to get dma channel\n");
- return ret;
- }
- s3c2410_dma_devconfig(s->dma_ch, source, hwcfg, devaddr);
- s3c2410_dma_config(s->dma_ch, 2, dcon);
- s3c2410_dma_set_buffdone_fn(s->dma_ch, audio_dmain_done_callback);
- s3c2410_dma_setflags(s->dma_ch, flags);
- s->dma_ok =1;
- return ret ;
- }
- else
- return 1;
- }
- static int audio_clear_dma(audio_stream_t * s,struct s3c2410_dma_client *client)
- {
- DPRINTK("audio_clear_dma\n");
- s3c2410_dma_set_buffdone_fn(s->dma_ch, NULL);
- s3c2410_dma_free(s->dma_ch, client);
- return 0;
- }
- static int s3c2410iis_probe(struct platform_device *pdev)
- {
- struct resource *res;
- unsigned long flags;
- int ret;
- DPRINTK("s3c2410iis_probe\n");
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- printk(KERN_INFO PFX "failed to get memory region resouce\n");
- return -ENOENT;
- }
- //iis_base = (void *)S3C24XX_VA_IIS ;
- res = request_mem_region(res->start, RESSIZE(res), pdev->name);
- if(res == 0){
- printk(KERN_INFO PFX "failed to request io memory region.\n");
- return -ENOENT;
- }
- iis_base = ioremap(res->start, RESSIZE(res));
- if(iis_base == 0){
- printk(KERN_INFO PFX "failed to ioremap() io memory region.\n"); ret = -EINVAL;
- goto free_mem_region;
- }
- iis_clock = clk_get(&pdev->dev, "iis");
- if (iis_clock == NULL) {
- printk(KERN_INFO PFX "failed to find clock source\n");
- return -ENOENT;
- }
- /**************************modify by lfc*****************************/
- clk_enable(iis_clock);
- /*****************************end add********************************/
- local_irq_save(flags);
- /* GPB 4: L3CLOCK, OUTPUT */
- s3c2410_gpio_cfgpin(L3CLOCK, L3CLOCK_OUTP);
- s3c2410_gpio_pullup(L3CLOCK,1);
- /* GPB 3: L3DATA, OUTPUT */
- s3c2410_gpio_cfgpin(L3DATA,L3DATA_OUTP);
- /* GPB 2: L3MODE, OUTPUT */
- s3c2410_gpio_cfgpin(L3MODE,L3MODE_OUTP);
- s3c2410_gpio_pullup(L3MODE,1);
- /* GPE 3: I2SSDI */
- s3c2410_gpio_cfgpin(S3C2410_GPE3,S3C2410_GPE3_I2SSDI);
- s3c2410_gpio_pullup(S3C2410_GPE3,1);
- /* GPE 0: I2SLRCK */
- s3c2410_gpio_cfgpin(S3C2410_GPE0,S3C2410_GPE0_I2SLRCK);
- s3c2410_gpio_pullup(S3C2410_GPE0,1);
- /* GPE 1: I2SSCLK */
- s3c2410_gpio_cfgpin(S3C2410_GPE1,S3C2410_GPE1_I2SSCLK);
- s3c2410_gpio_pullup(S3C2410_GPE1,1);
- /* GPE 2: CDCLK */
- s3c2410_gpio_cfgpin(S3C2410_GPE2,S3C2410_GPE2_CDCLK);
- s3c2410_gpio_pullup(S3C2410_GPE2,1);
- /* GPE 4: I2SSDO */
- s3c2410_gpio_cfgpin(S3C2410_GPE4,S3C2410_GPE4_I2SSDO);
- s3c2410_gpio_pullup(S3C2410_GPE4,1);
- local_irq_restore(flags);
- init_s3c2410_iis_bus();
- init_uda1341();
- output_stream.dma_ch = DMA_CH2;
- if (audio_init_dma(&output_stream, "UDA1341 out")) {
- audio_clear_dma(&output_stream,&s3c2410iis_dma_out);
- printk( KERN_WARNING AUDIO_NAME_VERBOSE
- ": unable to get DMA channels\n" );
- return -EBUSY;
- }
- input_stream.dma_ch = DMA_CH1;
- if (audio_init_dma(&input_stream, "UDA1341 in")) {
- audio_clear_dma(&input_stream,&s3c2410iis_dma_in);
- printk( KERN_WARNING AUDIO_NAME_VERBOSE
- ": unable to get DMA channels\n" );
- return -EBUSY;
- }
- audio_dev_dsp = register_sound_dsp(&smdk2410_audio_fops, -1);
- audio_dev_mixer = register_sound_mixer(&smdk2410_mixer_fops, -1);
- printk(AUDIO_NAME_VERBOSE " initialized\n");
- free_mem_region:
- release_mem_region(res->start, RESSIZE(res));
- return 0;
- }
- static int s3c2410iis_remove(struct platform_device *dev)
- {
- DPRINTK("s3c2410iis_remove\n");
- if (iis_clock != NULL){
- clk_disable(iis_clock);
- clk_put(iis_clock);
- iis_clock = NULL;
- }
- unregister_sound_dsp(audio_dev_dsp);
- unregister_sound_mixer(audio_dev_mixer);
- audio_clear_dma(&output_stream,&s3c2410iis_dma_out);
- audio_clear_dma(&input_stream,&s3c2410iis_dma_in); /* input */
- printk(AUDIO_NAME_VERBOSE " unloaded\n");
- return 0;
- }
- static struct platform_driver s3c2410iis_driver = {
- .probe = s3c2410iis_probe,
- .remove = s3c2410iis_remove,
- .driver = {
- .name = "s3c2410-iis",
- .owner = THIS_MODULE,
- },
- };
- static int __init s3c2410_uda1341_init(void)
- {
- memzero(&input_stream, sizeof(audio_stream_t));
- memzero(&output_stream, sizeof(audio_stream_t));
- return platform_driver_register(&s3c2410iis_driver);
- }
- static void __exit s3c2410_uda1341_exit(void)
- {
- platform_driver_unregister(&s3c2410iis_driver);
- }
- module_init(s3c2410_uda1341_init);
- module_exit(s3c2410_uda1341_exit);
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("S3C2410 uda1341 sound driver");