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-rw-r--r--sound/soc/fsl/mpc5200_psc_i2s.c754
1 files changed, 55 insertions, 699 deletions
diff --git a/sound/soc/fsl/mpc5200_psc_i2s.c b/sound/soc/fsl/mpc5200_psc_i2s.c
index 1111c71..ce8de90 100644
--- a/sound/soc/fsl/mpc5200_psc_i2s.c
+++ b/sound/soc/fsl/mpc5200_psc_i2s.c
@@ -3,31 +3,21 @@
* ALSA SoC Digital Audio Interface (DAI) driver
*
* Copyright (C) 2008 Secret Lab Technologies Ltd.
+ * Copyright (C) 2009 Jon Smirl, Digispeaker
*/
-#include <linux/init.h>
#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/delay.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
-#include <linux/dma-mapping.h>
-#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
-#include <sound/initval.h>
#include <sound/soc.h>
-#include <sound/soc-of-simple.h>
-#include <sysdev/bestcomm/bestcomm.h>
-#include <sysdev/bestcomm/gen_bd.h>
#include <asm/mpc52xx_psc.h>
-MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
-MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
-MODULE_LICENSE("GPL");
+#include "mpc5200_psc_i2s.h"
+#include "mpc5200_dma.h"
/**
* PSC_I2S_RATES: sample rates supported by the I2S
@@ -44,191 +34,17 @@ MODULE_LICENSE("GPL");
* PSC_I2S_FORMATS: audio formats supported by the PSC I2S mode
*/
#define PSC_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \
- SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S24_BE | \
- SNDRV_PCM_FMTBIT_S32_BE)
-
-/**
- * psc_i2s_stream - Data specific to a single stream (playback or capture)
- * @active: flag indicating if the stream is active
- * @psc_i2s: pointer back to parent psc_i2s data structure
- * @bcom_task: bestcomm task structure
- * @irq: irq number for bestcomm task
- * @period_start: physical address of start of DMA region
- * @period_end: physical address of end of DMA region
- * @period_next_pt: physical address of next DMA buffer to enqueue
- * @period_bytes: size of DMA period in bytes
- */
-struct psc_i2s_stream {
- int active;
- struct psc_i2s *psc_i2s;
- struct bcom_task *bcom_task;
- int irq;
- struct snd_pcm_substream *stream;
- dma_addr_t period_start;
- dma_addr_t period_end;
- dma_addr_t period_next_pt;
- dma_addr_t period_current_pt;
- int period_bytes;
-};
-
-/**
- * psc_i2s - Private driver data
- * @name: short name for this device ("PSC0", "PSC1", etc)
- * @psc_regs: pointer to the PSC's registers
- * @fifo_regs: pointer to the PSC's FIFO registers
- * @irq: IRQ of this PSC
- * @dev: struct device pointer
- * @dai: the CPU DAI for this device
- * @sicr: Base value used in serial interface control register; mode is ORed
- * with this value.
- * @playback: Playback stream context data
- * @capture: Capture stream context data
- */
-struct psc_i2s {
- char name[32];
- struct mpc52xx_psc __iomem *psc_regs;
- struct mpc52xx_psc_fifo __iomem *fifo_regs;
- unsigned int irq;
- struct device *dev;
- struct snd_soc_dai dai;
- spinlock_t lock;
- u32 sicr;
-
- /* per-stream data */
- struct psc_i2s_stream playback;
- struct psc_i2s_stream capture;
-
- /* Statistics */
- struct {
- int overrun_count;
- int underrun_count;
- } stats;
-};
-
-/*
- * Interrupt handlers
- */
-static irqreturn_t psc_i2s_status_irq(int irq, void *_psc_i2s)
-{
- struct psc_i2s *psc_i2s = _psc_i2s;
- struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
- u16 isr;
-
- isr = in_be16(&regs->mpc52xx_psc_isr);
-
- /* Playback underrun error */
- if (psc_i2s->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP))
- psc_i2s->stats.underrun_count++;
-
- /* Capture overrun error */
- if (psc_i2s->capture.active && (isr & MPC52xx_PSC_IMR_ORERR))
- psc_i2s->stats.overrun_count++;
-
- out_8(&regs->command, 4 << 4); /* reset the error status */
-
- return IRQ_HANDLED;
-}
-
-/**
- * psc_i2s_bcom_enqueue_next_buffer - Enqueue another audio buffer
- * @s: pointer to stream private data structure
- *
- * Enqueues another audio period buffer into the bestcomm queue.
- *
- * Note: The routine must only be called when there is space available in
- * the queue. Otherwise the enqueue will fail and the audio ring buffer
- * will get out of sync
- */
-static void psc_i2s_bcom_enqueue_next_buffer(struct psc_i2s_stream *s)
-{
- struct bcom_bd *bd;
-
- /* Prepare and enqueue the next buffer descriptor */
- bd = bcom_prepare_next_buffer(s->bcom_task);
- bd->status = s->period_bytes;
- bd->data[0] = s->period_next_pt;
- bcom_submit_next_buffer(s->bcom_task, NULL);
-
- /* Update for next period */
- s->period_next_pt += s->period_bytes;
- if (s->period_next_pt >= s->period_end)
- s->period_next_pt = s->period_start;
-}
-
-/* Bestcomm DMA irq handler */
-static irqreturn_t psc_i2s_bcom_irq(int irq, void *_psc_i2s_stream)
-{
- struct psc_i2s_stream *s = _psc_i2s_stream;
-
- /* For each finished period, dequeue the completed period buffer
- * and enqueue a new one in it's place. */
- while (bcom_buffer_done(s->bcom_task)) {
- bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
- s->period_current_pt += s->period_bytes;
- if (s->period_current_pt >= s->period_end)
- s->period_current_pt = s->period_start;
- psc_i2s_bcom_enqueue_next_buffer(s);
- bcom_enable(s->bcom_task);
- }
-
- /* If the stream is active, then also inform the PCM middle layer
- * of the period finished event. */
- if (s->active)
- snd_pcm_period_elapsed(s->stream);
-
- return IRQ_HANDLED;
-}
-
-/**
- * psc_i2s_startup: create a new substream
- *
- * This is the first function called when a stream is opened.
- *
- * If this is the first stream open, then grab the IRQ and program most of
- * the PSC registers.
- */
-static int psc_i2s_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
- int rc;
-
- dev_dbg(psc_i2s->dev, "psc_i2s_startup(substream=%p)\n", substream);
-
- if (!psc_i2s->playback.active &&
- !psc_i2s->capture.active) {
- /* Setup the IRQs */
- rc = request_irq(psc_i2s->irq, &psc_i2s_status_irq, IRQF_SHARED,
- "psc-i2s-status", psc_i2s);
- rc |= request_irq(psc_i2s->capture.irq,
- &psc_i2s_bcom_irq, IRQF_SHARED,
- "psc-i2s-capture", &psc_i2s->capture);
- rc |= request_irq(psc_i2s->playback.irq,
- &psc_i2s_bcom_irq, IRQF_SHARED,
- "psc-i2s-playback", &psc_i2s->playback);
- if (rc) {
- free_irq(psc_i2s->irq, psc_i2s);
- free_irq(psc_i2s->capture.irq,
- &psc_i2s->capture);
- free_irq(psc_i2s->playback.irq,
- &psc_i2s->playback);
- return -ENODEV;
- }
- }
-
- return 0;
-}
+ SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
+ struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
u32 mode;
- dev_dbg(psc_i2s->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
+ dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i"
" periods=%i buffer_size=%i buffer_bytes=%i\n",
__func__, substream, params_period_size(params),
params_period_bytes(params), params_periods(params),
@@ -248,175 +64,15 @@ static int psc_i2s_hw_params(struct snd_pcm_substream *substream,
mode = MPC52xx_PSC_SICR_SIM_CODEC_32;
break;
default:
- dev_dbg(psc_i2s->dev, "invalid format\n");
- return -EINVAL;
- }
- out_be32(&psc_i2s->psc_regs->sicr, psc_i2s->sicr | mode);
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
- return 0;
-}
-
-static int psc_i2s_hw_free(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
-{
- snd_pcm_set_runtime_buffer(substream, NULL);
- return 0;
-}
-
-/**
- * psc_i2s_trigger: start and stop the DMA transfer.
- *
- * This function is called by ALSA to start, stop, pause, and resume the DMA
- * transfer of data.
- */
-static int psc_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct psc_i2s_stream *s;
- struct mpc52xx_psc __iomem *regs = psc_i2s->psc_regs;
- u16 imr;
- u8 psc_cmd;
- unsigned long flags;
-
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
- s = &psc_i2s->capture;
- else
- s = &psc_i2s->playback;
-
- dev_dbg(psc_i2s->dev, "psc_i2s_trigger(substream=%p, cmd=%i)"
- " stream_id=%i\n",
- substream, cmd, substream->pstr->stream);
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- s->period_bytes = frames_to_bytes(runtime,
- runtime->period_size);
- s->period_start = virt_to_phys(runtime->dma_area);
- s->period_end = s->period_start +
- (s->period_bytes * runtime->periods);
- s->period_next_pt = s->period_start;
- s->period_current_pt = s->period_start;
- s->active = 1;
-
- /* First; reset everything */
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
- out_8(&regs->command, MPC52xx_PSC_RST_RX);
- out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT);
- } else {
- out_8(&regs->command, MPC52xx_PSC_RST_TX);
- out_8(&regs->command, MPC52xx_PSC_RST_ERR_STAT);
- }
-
- /* Next, fill up the bestcomm bd queue and enable DMA.
- * This will begin filling the PSC's fifo. */
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
- bcom_gen_bd_rx_reset(s->bcom_task);
- else
- bcom_gen_bd_tx_reset(s->bcom_task);
- while (!bcom_queue_full(s->bcom_task))
- psc_i2s_bcom_enqueue_next_buffer(s);
- bcom_enable(s->bcom_task);
-
- /* Due to errata in the i2s mode; need to line up enabling
- * the transmitter with a transition on the frame sync
- * line */
-
- spin_lock_irqsave(&psc_i2s->lock, flags);
- /* first make sure it is low */
- while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) != 0)
- ;
- /* then wait for the transition to high */
- while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) == 0)
- ;
- /* Finally, enable the PSC.
- * Receiver must always be enabled; even when we only want
- * transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
- psc_cmd = MPC52xx_PSC_RX_ENABLE;
- if (substream->pstr->stream == SNDRV_PCM_STREAM_PLAYBACK)
- psc_cmd |= MPC52xx_PSC_TX_ENABLE;
- out_8(&regs->command, psc_cmd);
- spin_unlock_irqrestore(&psc_i2s->lock, flags);
-
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- /* Turn off the PSC */
- s->active = 0;
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
- if (!psc_i2s->playback.active) {
- out_8(&regs->command, 2 << 4); /* reset rx */
- out_8(&regs->command, 3 << 4); /* reset tx */
- out_8(&regs->command, 4 << 4); /* reset err */
- }
- } else {
- out_8(&regs->command, 3 << 4); /* reset tx */
- out_8(&regs->command, 4 << 4); /* reset err */
- if (!psc_i2s->capture.active)
- out_8(&regs->command, 2 << 4); /* reset rx */
- }
-
- bcom_disable(s->bcom_task);
- while (!bcom_queue_empty(s->bcom_task))
- bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
-
- break;
-
- default:
- dev_dbg(psc_i2s->dev, "invalid command\n");
+ dev_dbg(psc_dma->dev, "invalid format\n");
return -EINVAL;
}
-
- /* Update interrupt enable settings */
- imr = 0;
- if (psc_i2s->playback.active)
- imr |= MPC52xx_PSC_IMR_TXEMP;
- if (psc_i2s->capture.active)
- imr |= MPC52xx_PSC_IMR_ORERR;
- out_be16(&regs->isr_imr.imr, imr);
+ out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode);
return 0;
}
/**
- * psc_i2s_shutdown: shutdown the data transfer on a stream
- *
- * Shutdown the PSC if there are no other substreams open.
- */
-static void psc_i2s_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
-
- dev_dbg(psc_i2s->dev, "psc_i2s_shutdown(substream=%p)\n", substream);
-
- /*
- * If this is the last active substream, disable the PSC and release
- * the IRQ.
- */
- if (!psc_i2s->playback.active &&
- !psc_i2s->capture.active) {
-
- /* Disable all interrupts and reset the PSC */
- out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0);
- out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset tx */
- out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset rx */
- out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */
- out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */
-
- /* Release irqs */
- free_irq(psc_i2s->irq, psc_i2s);
- free_irq(psc_i2s->capture.irq, &psc_i2s->capture);
- free_irq(psc_i2s->playback.irq, &psc_i2s->playback);
- }
-}
-
-/**
* psc_i2s_set_sysclk: set the clock frequency and direction
*
* This function is called by the machine driver to tell us what the clock
@@ -433,8 +89,8 @@ static void psc_i2s_shutdown(struct snd_pcm_substream *substream,
static int psc_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
- struct psc_i2s *psc_i2s = cpu_dai->private_data;
- dev_dbg(psc_i2s->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n",
+ struct psc_dma *psc_dma = cpu_dai->private_data;
+ dev_dbg(psc_dma->dev, "psc_i2s_set_sysclk(cpu_dai=%p, dir=%i)\n",
cpu_dai, dir);
return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL;
}
@@ -452,8 +108,8 @@ static int psc_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
*/
static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
{
- struct psc_i2s *psc_i2s = cpu_dai->private_data;
- dev_dbg(psc_i2s->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n",
+ struct psc_dma *psc_dma = cpu_dai->private_data;
+ dev_dbg(psc_dma->dev, "psc_i2s_set_fmt(cpu_dai=%p, format=%i)\n",
cpu_dai, format);
return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL;
}
@@ -469,16 +125,13 @@ static int psc_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
* psc_i2s_dai_template: template CPU Digital Audio Interface
*/
static struct snd_soc_dai_ops psc_i2s_dai_ops = {
- .startup = psc_i2s_startup,
.hw_params = psc_i2s_hw_params,
- .hw_free = psc_i2s_hw_free,
- .shutdown = psc_i2s_shutdown,
- .trigger = psc_i2s_trigger,
.set_sysclk = psc_i2s_set_sysclk,
.set_fmt = psc_i2s_set_fmt,
};
-static struct snd_soc_dai psc_i2s_dai_template = {
+struct snd_soc_dai psc_i2s_dai[] = {{
+ .name = "I2S",
.playback = {
.channels_min = 2,
.channels_max = 2,
@@ -492,223 +145,8 @@ static struct snd_soc_dai psc_i2s_dai_template = {
.formats = PSC_I2S_FORMATS,
},
.ops = &psc_i2s_dai_ops,
-};
-
-/* ---------------------------------------------------------------------
- * The PSC I2S 'ASoC platform' driver
- *
- * Can be referenced by an 'ASoC machine' driver
- * This driver only deals with the audio bus; it doesn't have any
- * interaction with the attached codec
- */
-
-static const struct snd_pcm_hardware psc_i2s_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_BATCH,
- .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |
- SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE,
- .rate_min = 8000,
- .rate_max = 48000,
- .channels_min = 2,
- .channels_max = 2,
- .period_bytes_max = 1024 * 1024,
- .period_bytes_min = 32,
- .periods_min = 2,
- .periods_max = 256,
- .buffer_bytes_max = 2 * 1024 * 1024,
- .fifo_size = 0,
-};
-
-static int psc_i2s_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
- struct psc_i2s_stream *s;
-
- dev_dbg(psc_i2s->dev, "psc_i2s_pcm_open(substream=%p)\n", substream);
-
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
- s = &psc_i2s->capture;
- else
- s = &psc_i2s->playback;
-
- snd_soc_set_runtime_hwparams(substream, &psc_i2s_pcm_hardware);
-
- s->stream = substream;
- return 0;
-}
-
-static int psc_i2s_pcm_close(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
- struct psc_i2s_stream *s;
-
- dev_dbg(psc_i2s->dev, "psc_i2s_pcm_close(substream=%p)\n", substream);
-
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
- s = &psc_i2s->capture;
- else
- s = &psc_i2s->playback;
-
- s->stream = NULL;
- return 0;
-}
-
-static snd_pcm_uframes_t
-psc_i2s_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct psc_i2s *psc_i2s = rtd->dai->cpu_dai->private_data;
- struct psc_i2s_stream *s;
- dma_addr_t count;
-
- if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
- s = &psc_i2s->capture;
- else
- s = &psc_i2s->playback;
-
- count = s->period_current_pt - s->period_start;
-
- return bytes_to_frames(substream->runtime, count);
-}
-
-static struct snd_pcm_ops psc_i2s_pcm_ops = {
- .open = psc_i2s_pcm_open,
- .close = psc_i2s_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .pointer = psc_i2s_pcm_pointer,
-};
-
-static u64 psc_i2s_pcm_dmamask = 0xffffffff;
-static int psc_i2s_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
- struct snd_pcm *pcm)
-{
- struct snd_soc_pcm_runtime *rtd = pcm->private_data;
- size_t size = psc_i2s_pcm_hardware.buffer_bytes_max;
- int rc = 0;
-
- dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_new(card=%p, dai=%p, pcm=%p)\n",
- card, dai, pcm);
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &psc_i2s_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
-
- if (pcm->streams[0].substream) {
- rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
- &pcm->streams[0].substream->dma_buffer);
- if (rc)
- goto playback_alloc_err;
- }
-
- if (pcm->streams[1].substream) {
- rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev, size,
- &pcm->streams[1].substream->dma_buffer);
- if (rc)
- goto capture_alloc_err;
- }
-
- return 0;
-
- capture_alloc_err:
- if (pcm->streams[0].substream)
- snd_dma_free_pages(&pcm->streams[0].substream->dma_buffer);
- playback_alloc_err:
- dev_err(card->dev, "Cannot allocate buffer(s)\n");
- return -ENOMEM;
-}
-
-static void psc_i2s_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_soc_pcm_runtime *rtd = pcm->private_data;
- struct snd_pcm_substream *substream;
- int stream;
-
- dev_dbg(rtd->socdev->dev, "psc_i2s_pcm_free(pcm=%p)\n", pcm);
-
- for (stream = 0; stream < 2; stream++) {
- substream = pcm->streams[stream].substream;
- if (substream) {
- snd_dma_free_pages(&substream->dma_buffer);
- substream->dma_buffer.area = NULL;
- substream->dma_buffer.addr = 0;
- }
- }
-}
-
-struct snd_soc_platform psc_i2s_pcm_soc_platform = {
- .name = "mpc5200-psc-audio",
- .pcm_ops = &psc_i2s_pcm_ops,
- .pcm_new = &psc_i2s_pcm_new,
- .pcm_free = &psc_i2s_pcm_free,
-};
-
-/* ---------------------------------------------------------------------
- * Sysfs attributes for debugging
- */
-
-static ssize_t psc_i2s_status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
-
- return sprintf(buf, "status=%.4x sicr=%.8x rfnum=%i rfstat=0x%.4x "
- "tfnum=%i tfstat=0x%.4x\n",
- in_be16(&psc_i2s->psc_regs->sr_csr.status),
- in_be32(&psc_i2s->psc_regs->sicr),
- in_be16(&psc_i2s->fifo_regs->rfnum) & 0x1ff,
- in_be16(&psc_i2s->fifo_regs->rfstat),
- in_be16(&psc_i2s->fifo_regs->tfnum) & 0x1ff,
- in_be16(&psc_i2s->fifo_regs->tfstat));
-}
-
-static int *psc_i2s_get_stat_attr(struct psc_i2s *psc_i2s, const char *name)
-{
- if (strcmp(name, "playback_underrun") == 0)
- return &psc_i2s->stats.underrun_count;
- if (strcmp(name, "capture_overrun") == 0)
- return &psc_i2s->stats.overrun_count;
-
- return NULL;
-}
-
-static ssize_t psc_i2s_stat_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
- int *attrib;
-
- attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name);
- if (!attrib)
- return 0;
-
- return sprintf(buf, "%i\n", *attrib);
-}
-
-static ssize_t psc_i2s_stat_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t count)
-{
- struct psc_i2s *psc_i2s = dev_get_drvdata(dev);
- int *attrib;
-
- attrib = psc_i2s_get_stat_attr(psc_i2s, attr->attr.name);
- if (!attrib)
- return 0;
-
- *attrib = simple_strtoul(buf, NULL, 0);
- return count;
-}
-
-static DEVICE_ATTR(status, 0644, psc_i2s_status_show, NULL);
-static DEVICE_ATTR(playback_underrun, 0644, psc_i2s_stat_show,
- psc_i2s_stat_store);
-static DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show,
- psc_i2s_stat_store);
+} };
+EXPORT_SYMBOL_GPL(psc_i2s_dai);
/* ---------------------------------------------------------------------
* OF platform bus binding code:
@@ -718,150 +156,65 @@ static DEVICE_ATTR(capture_overrun, 0644, psc_i2s_stat_show,
static int __devinit psc_i2s_of_probe(struct of_device *op,
const struct of_device_id *match)
{
- phys_addr_t fifo;
- struct psc_i2s *psc_i2s;
- struct resource res;
- int size, psc_id, irq, rc;
- const __be32 *prop;
- void __iomem *regs;
-
- dev_dbg(&op->dev, "probing psc i2s device\n");
-
- /* Get the PSC ID */
- prop = of_get_property(op->node, "cell-index", &size);
- if (!prop || size < sizeof *prop)
- return -ENODEV;
- psc_id = be32_to_cpu(*prop);
-
- /* Fetch the registers and IRQ of the PSC */
- irq = irq_of_parse_and_map(op->node, 0);
- if (of_address_to_resource(op->node, 0, &res)) {
- dev_err(&op->dev, "Missing reg property\n");
- return -ENODEV;
- }
- regs = ioremap(res.start, 1 + res.end - res.start);
- if (!regs) {
- dev_err(&op->dev, "Could not map registers\n");
- return -ENODEV;
- }
+ int rc;
+ struct psc_dma *psc_dma;
+ struct mpc52xx_psc __iomem *regs;
- /* Allocate and initialize the driver private data */
- psc_i2s = kzalloc(sizeof *psc_i2s, GFP_KERNEL);
- if (!psc_i2s) {
- iounmap(regs);
- return -ENOMEM;
- }
- spin_lock_init(&psc_i2s->lock);
- psc_i2s->irq = irq;
- psc_i2s->psc_regs = regs;
- psc_i2s->fifo_regs = regs + sizeof *psc_i2s->psc_regs;
- psc_i2s->dev = &op->dev;
- psc_i2s->playback.psc_i2s = psc_i2s;
- psc_i2s->capture.psc_i2s = psc_i2s;
- snprintf(psc_i2s->name, sizeof psc_i2s->name, "PSC%u", psc_id+1);
-
- /* Fill out the CPU DAI structure */
- memcpy(&psc_i2s->dai, &psc_i2s_dai_template, sizeof psc_i2s->dai);
- psc_i2s->dai.private_data = psc_i2s;
- psc_i2s->dai.name = psc_i2s->name;
- psc_i2s->dai.id = psc_id;
-
- /* Find the address of the fifo data registers and setup the
- * DMA tasks */
- fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32);
- psc_i2s->capture.bcom_task =
- bcom_psc_gen_bd_rx_init(psc_id, 10, fifo, 512);
- psc_i2s->playback.bcom_task =
- bcom_psc_gen_bd_tx_init(psc_id, 10, fifo);
- if (!psc_i2s->capture.bcom_task ||
- !psc_i2s->playback.bcom_task) {
- dev_err(&op->dev, "Could not allocate bestcomm tasks\n");
- iounmap(regs);
- kfree(psc_i2s);
- return -ENODEV;
+ rc = mpc5200_audio_dma_create(op);
+ if (rc != 0)
+ return rc;
+
+ rc = snd_soc_register_dais(psc_i2s_dai, ARRAY_SIZE(psc_i2s_dai));
+ if (rc != 0) {
+ pr_err("Failed to register DAI\n");
+ return 0;
}
- /* Disable all interrupts and reset the PSC */
- out_be16(&psc_i2s->psc_regs->isr_imr.imr, 0);
- out_8(&psc_i2s->psc_regs->command, 3 << 4); /* reset transmitter */
- out_8(&psc_i2s->psc_regs->command, 2 << 4); /* reset receiver */
- out_8(&psc_i2s->psc_regs->command, 1 << 4); /* reset mode */
- out_8(&psc_i2s->psc_regs->command, 4 << 4); /* reset error */
+ psc_dma = dev_get_drvdata(&op->dev);
+ regs = psc_dma->psc_regs;
/* Configure the serial interface mode; defaulting to CODEC8 mode */
- psc_i2s->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
+ psc_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S |
MPC52xx_PSC_SICR_CLKPOL;
- if (of_get_property(op->node, "fsl,cellslave", NULL))
- psc_i2s->sicr |= MPC52xx_PSC_SICR_CELLSLAVE |
- MPC52xx_PSC_SICR_GENCLK;
- out_be32(&psc_i2s->psc_regs->sicr,
- psc_i2s->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
+ out_be32(&psc_dma->psc_regs->sicr,
+ psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
/* Check for the codec handle. If it is not present then we
* are done */
if (!of_get_property(op->node, "codec-handle", NULL))
return 0;
- /* Set up mode register;
- * First write: RxRdy (FIFO Alarm) generates rx FIFO irq
- * Second write: register Normal mode for non loopback
- */
- out_8(&psc_i2s->psc_regs->mode, 0);
- out_8(&psc_i2s->psc_regs->mode, 0);
-
- /* Set the TX and RX fifo alarm thresholds */
- out_be16(&psc_i2s->fifo_regs->rfalarm, 0x100);
- out_8(&psc_i2s->fifo_regs->rfcntl, 0x4);
- out_be16(&psc_i2s->fifo_regs->tfalarm, 0x100);
- out_8(&psc_i2s->fifo_regs->tfcntl, 0x7);
-
- /* Lookup the IRQ numbers */
- psc_i2s->playback.irq =
- bcom_get_task_irq(psc_i2s->playback.bcom_task);
- psc_i2s->capture.irq =
- bcom_get_task_irq(psc_i2s->capture.bcom_task);
-
- /* Save what we've done so it can be found again later */
- dev_set_drvdata(&op->dev, psc_i2s);
-
- /* Register the SYSFS files */
- rc = device_create_file(psc_i2s->dev, &dev_attr_status);
- rc |= device_create_file(psc_i2s->dev, &dev_attr_capture_overrun);
- rc |= device_create_file(psc_i2s->dev, &dev_attr_playback_underrun);
- if (rc)
- dev_info(psc_i2s->dev, "error creating sysfs files\n");
-
- snd_soc_register_platform(&psc_i2s_pcm_soc_platform);
-
- /* Tell the ASoC OF helpers about it */
- of_snd_soc_register_platform(&psc_i2s_pcm_soc_platform, op->node,
- &psc_i2s->dai);
+ /* Due to errata in the dma mode; need to line up enabling
+ * the transmitter with a transition on the frame sync
+ * line */
+
+ /* first make sure it is low */
+ while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) != 0)
+ ;
+ /* then wait for the transition to high */
+ while ((in_8(&regs->ipcr_acr.ipcr) & 0x80) == 0)
+ ;
+ /* Finally, enable the PSC.
+ * Receiver must always be enabled; even when we only want
+ * transmit. (see 15.3.2.3 of MPC5200B User's Guide) */
+
+ /* Go */
+ out_8(&psc_dma->psc_regs->command,
+ MPC52xx_PSC_TX_ENABLE | MPC52xx_PSC_RX_ENABLE);
return 0;
+
}
static int __devexit psc_i2s_of_remove(struct of_device *op)
{
- struct psc_i2s *psc_i2s = dev_get_drvdata(&op->dev);
-
- dev_dbg(&op->dev, "psc_i2s_remove()\n");
-
- snd_soc_unregister_platform(&psc_i2s_pcm_soc_platform);
-
- bcom_gen_bd_rx_release(psc_i2s->capture.bcom_task);
- bcom_gen_bd_tx_release(psc_i2s->playback.bcom_task);
-
- iounmap(psc_i2s->psc_regs);
- iounmap(psc_i2s->fifo_regs);
- kfree(psc_i2s);
- dev_set_drvdata(&op->dev, NULL);
-
- return 0;
+ return mpc5200_audio_dma_destroy(op);
}
/* Match table for of_platform binding */
static struct of_device_id psc_i2s_match[] __devinitdata = {
{ .compatible = "fsl,mpc5200-psc-i2s", },
+ { .compatible = "fsl,mpc5200b-psc-i2s", },
{}
};
MODULE_DEVICE_TABLE(of, psc_i2s_match);
@@ -892,4 +245,7 @@ static void __exit psc_i2s_exit(void)
}
module_exit(psc_i2s_exit);
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver");
+MODULE_LICENSE("GPL");
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