Rewrite the mpc5200 audio DMA code to support both I2S and AC97.
Signed-off-by: Jon Smirl jonsmirl@gmail.com --- sound/soc/fsl/Kconfig | 1 sound/soc/fsl/mpc5200_dma.c | 442 ++++++++++++++++++++++++--------------- sound/soc/fsl/mpc5200_dma.h | 43 ++-- sound/soc/fsl/mpc5200_psc_i2s.c | 247 ++++------------------ sound/soc/fsl/mpc5200_psc_i2s.h | 12 + 5 files changed, 356 insertions(+), 389 deletions(-) create mode 100644 sound/soc/fsl/mpc5200_psc_i2s.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index dc79bdf..1918c78 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -25,7 +25,6 @@ config SND_SOC_MPC8610_HPCD config SND_SOC_MPC5200_I2S tristate "Freescale MPC5200 PSC in I2S mode driver" depends on PPC_MPC52xx && PPC_BESTCOMM - select SND_SOC_OF_SIMPLE select SND_MPC52xx_DMA select PPC_BESTCOMM_GEN_BD help diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c index 6850392..efec33a 100644 --- a/sound/soc/fsl/mpc5200_dma.c +++ b/sound/soc/fsl/mpc5200_dma.c @@ -3,23 +3,13 @@ * ALSA SoC Platform 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> @@ -27,10 +17,6 @@
#include "mpc5200_dma.h"
-MODULE_AUTHOR("Grant Likely grant.likely@secretlab.ca"); -MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver"); -MODULE_LICENSE("GPL"); - /* * Interrupt handlers */ @@ -50,7 +36,7 @@ static irqreturn_t psc_dma_status_irq(int irq, void *_psc_dma) if (psc_dma->capture.active && (isr & MPC52xx_PSC_IMR_ORERR)) psc_dma->stats.overrun_count++;
- out_8(®s->command, 4 << 4); /* reset the error status */ + out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT);
return IRQ_HANDLED; } @@ -81,21 +67,36 @@ static void psc_dma_bcom_enqueue_next_buffer(struct psc_dma_stream *s) s->period_next_pt = s->period_start; }
+static void psc_dma_bcom_enqueue_tx(struct psc_dma_stream *s) +{ + while (s->appl_ptr < s->runtime->control->appl_ptr) { + + if (bcom_queue_full(s->bcom_task)) + return; + + s->appl_ptr += s->period_size; + + psc_dma_bcom_enqueue_next_buffer(s); + } +} + /* Bestcomm DMA irq handler */ -static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream) +static irqreturn_t psc_dma_bcom_irq_tx(int irq, void *_psc_dma_stream) { struct psc_dma_stream *s = _psc_dma_stream;
+ spin_lock(&s->psc_dma->lock); /* 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_dma_bcom_enqueue_next_buffer(s); - bcom_enable(s->bcom_task); } + psc_dma_bcom_enqueue_tx(s); + spin_unlock(&s->psc_dma->lock);
/* If the stream is active, then also inform the PCM middle layer * of the period finished event. */ @@ -105,49 +106,33 @@ static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream) return IRQ_HANDLED; }
-/** - * psc_dma_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. - */ -int psc_dma_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) +static irqreturn_t psc_dma_bcom_irq_rx(int irq, void *_psc_dma_stream) { - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; - int rc; + struct psc_dma_stream *s = _psc_dma_stream;
- dev_dbg(psc_dma->dev, "psc_dma_startup(substream=%p)\n", substream); + spin_lock(&s->psc_dma->lock); + /* 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);
- if (!psc_dma->playback.active && - !psc_dma->capture.active) { - /* Setup the IRQs */ - rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED, - "psc-dma-status", psc_dma); - rc |= request_irq(psc_dma->capture.irq, - &psc_dma_bcom_irq, IRQF_SHARED, - "psc-dma-capture", &psc_dma->capture); - rc |= request_irq(psc_dma->playback.irq, - &psc_dma_bcom_irq, IRQF_SHARED, - "psc-dma-playback", &psc_dma->playback); - if (rc) { - free_irq(psc_dma->irq, psc_dma); - free_irq(psc_dma->capture.irq, - &psc_dma->capture); - free_irq(psc_dma->playback.irq, - &psc_dma->playback); - return -ENODEV; - } + s->period_current_pt += s->period_bytes; + if (s->period_current_pt >= s->period_end) + s->period_current_pt = s->period_start; + + psc_dma_bcom_enqueue_next_buffer(s); } + spin_unlock(&s->psc_dma->lock);
- return 0; + /* 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; }
-int psc_dma_hw_free(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) +static int psc_dma_hw_free(struct snd_pcm_substream *substream) { snd_pcm_set_runtime_buffer(substream, NULL); return 0; @@ -159,8 +144,7 @@ int psc_dma_hw_free(struct snd_pcm_substream *substream, * This function is called by ALSA to start, stop, pause, and resume the DMA * transfer of data. */ -int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, - struct snd_soc_dai *dai) +static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; @@ -168,8 +152,8 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, struct psc_dma_stream *s; struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; u16 imr; - u8 psc_cmd; unsigned long flags; + int i;
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) s = &psc_dma->capture; @@ -189,68 +173,48 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, (s->period_bytes * runtime->periods); s->period_next_pt = s->period_start; s->period_current_pt = s->period_start; + s->period_size = runtime->period_size; s->active = 1;
- /* First; reset everything */ + /* track appl_ptr so that we have a better chance of detecting + * end of stream and not over running it. + */ + s->runtime = runtime; + s->appl_ptr = s->runtime->control->appl_ptr - + (runtime->period_size * runtime->periods); + + /* Fill up the bestcomm bd queue and enable DMA. + * This will begin filling the PSC's fifo. + */ + spin_lock_irqsave(&psc_dma->lock, flags); + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { - out_8(®s->command, MPC52xx_PSC_RST_RX); - out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + bcom_gen_bd_rx_reset(s->bcom_task); + for (i = 0; i < runtime->periods; i++) + if (!bcom_queue_full(s->bcom_task)) + psc_dma_bcom_enqueue_next_buffer(s); } else { - out_8(®s->command, MPC52xx_PSC_RST_TX); - out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + bcom_gen_bd_tx_reset(s->bcom_task); + psc_dma_bcom_enqueue_tx(s); }
- /* 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_dma_bcom_enqueue_next_buffer(s); bcom_enable(s->bcom_task); - - /* Due to errata in the dma mode; need to line up enabling - * the transmitter with a transition on the frame sync - * line */ - - spin_lock_irqsave(&psc_dma->lock, flags); - /* first make sure it is low */ - while ((in_8(®s->ipcr_acr.ipcr) & 0x80) != 0) - ; - /* then wait for the transition to high */ - while ((in_8(®s->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(®s->command, psc_cmd); spin_unlock_irqrestore(&psc_dma->lock, flags);
+ out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + break;
case SNDRV_PCM_TRIGGER_STOP: - /* Turn off the PSC */ s->active = 0; - if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { - if (!psc_dma->playback.active) { - out_8(®s->command, 2 << 4); /* reset rx */ - out_8(®s->command, 3 << 4); /* reset tx */ - out_8(®s->command, 4 << 4); /* reset err */ - } - } else { - out_8(®s->command, 3 << 4); /* reset tx */ - out_8(®s->command, 4 << 4); /* reset err */ - if (!psc_dma->capture.active) - out_8(®s->command, 2 << 4); /* reset rx */ - }
+ spin_lock_irqsave(&psc_dma->lock, flags); bcom_disable(s->bcom_task); - while (!bcom_queue_empty(s->bcom_task)) - bcom_retrieve_buffer(s->bcom_task, NULL, NULL); + 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); + spin_unlock_irqrestore(&psc_dma->lock, flags);
break;
@@ -265,44 +229,11 @@ int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, imr |= MPC52xx_PSC_IMR_TXEMP; if (psc_dma->capture.active) imr |= MPC52xx_PSC_IMR_ORERR; - out_be16(®s->isr_imr.imr, imr); + out_be16(®s->isr_imr.imr, psc_dma->imr | imr);
return 0; }
-/** - * psc_dma_shutdown: shutdown the data transfer on a stream - * - * Shutdown the PSC if there are no other substreams open. - */ -void psc_dma_shutdown(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai) -{ - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; - - dev_dbg(psc_dma->dev, "psc_dma_shutdown(substream=%p)\n", substream); - - /* - * If this is the last active substream, disable the PSC and release - * the IRQ. - */ - if (!psc_dma->playback.active && - !psc_dma->capture.active) { - - /* Disable all interrupts and reset the PSC */ - out_be16(&psc_dma->psc_regs->isr_imr.imr, 0); - out_8(&psc_dma->psc_regs->command, 3 << 4); /* reset tx */ - out_8(&psc_dma->psc_regs->command, 2 << 4); /* reset rx */ - out_8(&psc_dma->psc_regs->command, 1 << 4); /* reset mode */ - out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */ - - /* Release irqs */ - free_irq(psc_dma->irq, psc_dma); - free_irq(psc_dma->capture.irq, &psc_dma->capture); - free_irq(psc_dma->playback.irq, &psc_dma->playback); - } -}
/* --------------------------------------------------------------------- * The PSC DMA 'ASoC platform' driver @@ -312,62 +243,78 @@ void psc_dma_shutdown(struct snd_pcm_substream *substream, * interaction with the attached codec */
-static const struct snd_pcm_hardware psc_dma_pcm_hardware = { +static const struct snd_pcm_hardware psc_dma_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, + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, .rate_min = 8000, .rate_max = 48000, - .channels_min = 2, + .channels_min = 1, .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, + .fifo_size = 512, };
-static int psc_dma_pcm_open(struct snd_pcm_substream *substream) +static int psc_dma_open(struct snd_pcm_substream *substream) { + struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_pcm_runtime *rtd = substream->private_data; struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; struct psc_dma_stream *s; + int rc;
- dev_dbg(psc_dma->dev, "psc_dma_pcm_open(substream=%p)\n", substream); + dev_dbg(psc_dma->dev, "psc_dma_open(substream=%p)\n", substream);
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) s = &psc_dma->capture; else s = &psc_dma->playback;
- snd_soc_set_runtime_hwparams(substream, &psc_dma_pcm_hardware); + snd_soc_set_runtime_hwparams(substream, &psc_dma_hardware); + + rc = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (rc < 0) { + dev_err(substream->pcm->card->dev, "invalid buffer size\n"); + return rc; + }
s->stream = substream; return 0; }
-static int psc_dma_pcm_close(struct snd_pcm_substream *substream) +static int psc_dma_close(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; struct psc_dma_stream *s;
- dev_dbg(psc_dma->dev, "psc_dma_pcm_close(substream=%p)\n", substream); + dev_dbg(psc_dma->dev, "psc_dma_close(substream=%p)\n", substream);
if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) s = &psc_dma->capture; else s = &psc_dma->playback;
+ if (!psc_dma->playback.active && + !psc_dma->capture.active) { + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); + out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */ + } s->stream = NULL; return 0; }
static snd_pcm_uframes_t -psc_dma_pcm_pointer(struct snd_pcm_substream *substream) +psc_dma_pointer(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; @@ -384,60 +331,78 @@ psc_dma_pcm_pointer(struct snd_pcm_substream *substream) return bytes_to_frames(substream->runtime, count); }
-static struct snd_pcm_ops psc_dma_pcm_ops = { - .open = psc_dma_pcm_open, - .close = psc_dma_pcm_close, +static int +psc_dma_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); + + return 0; +} + +static struct snd_pcm_ops psc_dma_ops = { + .open = psc_dma_open, + .close = psc_dma_close, + .hw_free = psc_dma_hw_free, .ioctl = snd_pcm_lib_ioctl, - .pointer = psc_dma_pcm_pointer, + .pointer = psc_dma_pointer, + .trigger = psc_dma_trigger, + .hw_params = psc_dma_hw_params, };
-static u64 psc_dma_pcm_dmamask = 0xffffffff; -static int psc_dma_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, +static u64 psc_dma_dmamask = 0xffffffff; +static int psc_dma_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_dma_pcm_hardware.buffer_bytes_max; + struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; + size_t size = psc_dma_hardware.buffer_bytes_max; int rc = 0;
- dev_dbg(rtd->socdev->dev, "psc_dma_pcm_new(card=%p, dai=%p, pcm=%p)\n", + dev_dbg(rtd->socdev->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n", card, dai, pcm);
if (!card->dev->dma_mask) - card->dev->dma_mask = &psc_dma_pcm_dmamask; + card->dev->dma_mask = &psc_dma_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); + rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->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); + rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev, + size, &pcm->streams[1].substream->dma_buffer); if (rc) goto capture_alloc_err; }
+ if (rtd->socdev->card->codec->ac97) + rtd->socdev->card->codec->ac97->private_data = psc_dma; + 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_dma_pcm_free(struct snd_pcm *pcm) +static void psc_dma_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_dma_pcm_free(pcm=%p)\n", pcm); + dev_dbg(rtd->socdev->dev, "psc_dma_free(pcm=%p)\n", pcm);
for (stream = 0; stream < 2; stream++) { substream = pcm->streams[stream].substream; @@ -449,10 +414,151 @@ static void psc_dma_pcm_free(struct snd_pcm *pcm) } }
-struct snd_soc_platform psc_dma_pcm_soc_platform = { +struct snd_soc_platform mpc5200_audio_dma_platform = { .name = "mpc5200-psc-audio", - .pcm_ops = &psc_dma_pcm_ops, - .pcm_new = &psc_dma_pcm_new, - .pcm_free = &psc_dma_pcm_free, + .pcm_ops = &psc_dma_ops, + .pcm_new = &psc_dma_new, + .pcm_free = &psc_dma_free, }; +EXPORT_SYMBOL_GPL(mpc5200_audio_dma_platform); + +int mpc5200_audio_dma_create(struct of_device *op) +{ + phys_addr_t fifo; + struct psc_dma *psc_dma; + struct resource res; + int size, irq, rc; + const __be32 *prop; + void __iomem *regs; + + /* 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; + } + + /* Allocate and initialize the driver private data */ + psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL); + if (!psc_dma) { + iounmap(regs); + return -ENOMEM; + } + + /* Get the PSC ID */ + prop = of_get_property(op->node, "cell-index", &size); + if (!prop || size < sizeof *prop) + return -ENODEV; + + spin_lock_init(&psc_dma->lock); + psc_dma->id = be32_to_cpu(*prop); + psc_dma->irq = irq; + psc_dma->psc_regs = regs; + psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs; + psc_dma->dev = &op->dev; + psc_dma->playback.psc_dma = psc_dma; + psc_dma->capture.psc_dma = psc_dma; + snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_dma->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_dma->capture.bcom_task = + bcom_psc_gen_bd_rx_init(psc_dma->id, 10, fifo, 512); + psc_dma->playback.bcom_task = + bcom_psc_gen_bd_tx_init(psc_dma->id, 10, fifo); + if (!psc_dma->capture.bcom_task || + !psc_dma->playback.bcom_task) { + dev_err(&op->dev, "Could not allocate bestcomm tasks\n"); + iounmap(regs); + kfree(psc_dma); + return -ENODEV; + } + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); + /* reset receiver */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_RX); + /* reset transmitter */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_TX); + /* reset error */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_ERR_STAT); + /* reset mode */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_SEL_MODE_REG_1); + + /* Set up mode register; + * First write: RxRdy (FIFO Alarm) generates rx FIFO irq + * Second write: register Normal mode for non loopback + */ + out_8(&psc_dma->psc_regs->mode, 0); + out_8(&psc_dma->psc_regs->mode, 0); + + /* Set the TX and RX fifo alarm thresholds */ + out_be16(&psc_dma->fifo_regs->rfalarm, 0x100); + out_8(&psc_dma->fifo_regs->rfcntl, 0x4); + out_be16(&psc_dma->fifo_regs->tfalarm, 0x100); + out_8(&psc_dma->fifo_regs->tfcntl, 0x7); + + /* Lookup the IRQ numbers */ + psc_dma->playback.irq = + bcom_get_task_irq(psc_dma->playback.bcom_task); + psc_dma->capture.irq = + bcom_get_task_irq(psc_dma->capture.bcom_task); + + rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED, + "psc-dma-status", psc_dma); + rc |= request_irq(psc_dma->capture.irq, + &psc_dma_bcom_irq_rx, IRQF_SHARED, + "psc-dma-capture", &psc_dma->capture); + rc |= request_irq(psc_dma->playback.irq, + &psc_dma_bcom_irq_tx, IRQF_SHARED, + "psc-dma-playback", &psc_dma->playback); + if (rc) { + free_irq(psc_dma->irq, psc_dma); + free_irq(psc_dma->capture.irq, + &psc_dma->capture); + free_irq(psc_dma->playback.irq, + &psc_dma->playback); + return -ENODEV; + }
+ /* Save what we've done so it can be found again later */ + dev_set_drvdata(&op->dev, psc_dma); + + /* Tell the ASoC OF helpers about it */ + return snd_soc_register_platform(&mpc5200_audio_dma_platform); +} +EXPORT_SYMBOL_GPL(mpc5200_audio_dma_create); + +int mpc5200_audio_dma_destroy(struct of_device *op) +{ + struct psc_dma *psc_dma = dev_get_drvdata(&op->dev); + + dev_dbg(&op->dev, "mpc5200_audio_dma_destroy()\n"); + + snd_soc_unregister_platform(&mpc5200_audio_dma_platform); + + bcom_gen_bd_rx_release(psc_dma->capture.bcom_task); + bcom_gen_bd_tx_release(psc_dma->playback.bcom_task); + + /* Release irqs */ + free_irq(psc_dma->irq, psc_dma); + free_irq(psc_dma->capture.irq, &psc_dma->capture); + free_irq(psc_dma->playback.irq, &psc_dma->playback); + + iounmap(psc_dma->psc_regs); + kfree(psc_dma); + dev_set_drvdata(&op->dev, NULL); + + return 0; +} +EXPORT_SYMBOL_GPL(mpc5200_audio_dma_destroy); + +MODULE_AUTHOR("Grant Likely grant.likely@secretlab.ca"); +MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/fsl/mpc5200_dma.h b/sound/soc/fsl/mpc5200_dma.h index a33232c..7414c6f 100644 --- a/sound/soc/fsl/mpc5200_dma.h +++ b/sound/soc/fsl/mpc5200_dma.h @@ -5,8 +5,10 @@ #ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__ #define __SOUND_SOC_FSL_MPC5200_DMA_H__
+#define PSC_STREAM_NAME_LEN 32 + /** - * psc_dma_stream - Data specific to a single stream (playback or capture) + * psc_ac97_stream - Data specific to a single stream (playback or capture) * @active: flag indicating if the stream is active * @psc_dma: pointer back to parent psc_dma data structure * @bcom_task: bestcomm task structure @@ -17,6 +19,9 @@ * @period_bytes: size of DMA period in bytes */ struct psc_dma_stream { + struct snd_pcm_runtime *runtime; + snd_pcm_uframes_t appl_ptr; + int active; struct psc_dma *psc_dma; struct bcom_task *bcom_task; @@ -27,6 +32,7 @@ struct psc_dma_stream { dma_addr_t period_next_pt; dma_addr_t period_current_pt; int period_bytes; + int period_size; };
/** @@ -48,9 +54,12 @@ struct psc_dma { struct mpc52xx_psc_fifo __iomem *fifo_regs; unsigned int irq; struct device *dev; - struct snd_soc_dai dai; spinlock_t lock; u32 sicr; + uint sysclk; + int imr; + int id; + unsigned int slots;
/* per-stream data */ struct psc_dma_stream playback; @@ -58,24 +67,28 @@ struct psc_dma {
/* Statistics */ struct { - int overrun_count; - int underrun_count; + unsigned long overrun_count; + unsigned long underrun_count; } stats; };
+int mpc5200_audio_dma_create(struct of_device *op); +int mpc5200_audio_dma_destroy(struct of_device *op);
-int psc_dma_startup(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai); - -int psc_dma_hw_free(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai); - -void psc_dma_shutdown(struct snd_pcm_substream *substream, - struct snd_soc_dai *dai); +extern struct snd_soc_platform mpc5200_audio_dma_platform;
-int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd, - struct snd_soc_dai *dai); +/* whack this after Timur's patch is merged in to arch/powerpc/include/asm/delay.h */ +#define spin_event_timeout(condition, timeout, delay, rc) \ +{ \ + unsigned long __loops = tb_ticks_per_usec * timeout; \ + unsigned long __start = get_tbl(); \ + while ((rc = (condition)) && (tb_ticks_since(__start) <= __loops)) \ + if (delay) \ + udelay(delay); \ + else \ + cpu_relax(); \ +} +/* whack this after Timur's patch is merged in to arch/powerpc/include/asm/delay.h */
-extern struct snd_soc_platform psc_dma_pcm_soc_platform;
#endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */ diff --git a/sound/soc/fsl/mpc5200_psc_i2s.c b/sound/soc/fsl/mpc5200_psc_i2s.c index 12a7917..ce8de90 100644 --- a/sound/soc/fsl/mpc5200_psc_i2s.c +++ b/sound/soc/fsl/mpc5200_psc_i2s.c @@ -3,34 +3,22 @@ * 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>
+#include "mpc5200_psc_i2s.h" #include "mpc5200_dma.h"
-MODULE_AUTHOR("Grant Likely grant.likely@secretlab.ca"); -MODULE_DESCRIPTION("Freescale MPC5200 PSC in I2S mode ASoC Driver"); -MODULE_LICENSE("GPL"); - /** * PSC_I2S_RATES: sample rates supported by the I2S * @@ -46,8 +34,7 @@ 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) + 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, @@ -82,8 +69,6 @@ static int psc_i2s_hw_params(struct snd_pcm_substream *substream, } out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | mode);
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - return 0; }
@@ -140,16 +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_dma_startup, .hw_params = psc_i2s_hw_params, - .hw_free = psc_dma_hw_free, - .shutdown = psc_dma_shutdown, - .trigger = psc_dma_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, @@ -163,71 +145,8 @@ static struct snd_soc_dai psc_i2s_dai_template = { .formats = PSC_I2S_FORMATS, }, .ops = &psc_i2s_dai_ops, -}; - -/* --------------------------------------------------------------------- - * Sysfs attributes for debugging - */ - -static ssize_t psc_i2s_status_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct psc_dma *psc_dma = 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_dma->psc_regs->sr_csr.status), - in_be32(&psc_dma->psc_regs->sicr), - in_be16(&psc_dma->fifo_regs->rfnum) & 0x1ff, - in_be16(&psc_dma->fifo_regs->rfstat), - in_be16(&psc_dma->fifo_regs->tfnum) & 0x1ff, - in_be16(&psc_dma->fifo_regs->tfstat)); -} - -static int *psc_i2s_get_stat_attr(struct psc_dma *psc_dma, const char *name) -{ - if (strcmp(name, "playback_underrun") == 0) - return &psc_dma->stats.underrun_count; - if (strcmp(name, "capture_overrun") == 0) - return &psc_dma->stats.overrun_count; - - return NULL; -} - -static ssize_t psc_i2s_stat_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct psc_dma *psc_dma = dev_get_drvdata(dev); - int *attrib; - - attrib = psc_i2s_get_stat_attr(psc_dma, 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_dma *psc_dma = dev_get_drvdata(dev); - int *attrib; - - attrib = psc_i2s_get_stat_attr(psc_dma, 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: @@ -237,82 +156,26 @@ 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; + int rc; struct psc_dma *psc_dma; - 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; - } + struct mpc52xx_psc __iomem *regs;
- /* Allocate and initialize the driver private data */ - psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL); - if (!psc_dma) { - iounmap(regs); - return -ENOMEM; - } - spin_lock_init(&psc_dma->lock); - psc_dma->irq = irq; - psc_dma->psc_regs = regs; - psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs; - psc_dma->dev = &op->dev; - psc_dma->playback.psc_dma = psc_dma; - psc_dma->capture.psc_dma = psc_dma; - snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_id+1); - - /* Fill out the CPU DAI structure */ - memcpy(&psc_dma->dai, &psc_i2s_dai_template, sizeof psc_dma->dai); - psc_dma->dai.private_data = psc_dma; - psc_dma->dai.name = psc_dma->name; - psc_dma->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_dma->capture.bcom_task = - bcom_psc_gen_bd_rx_init(psc_id, 10, fifo, 512); - psc_dma->playback.bcom_task = - bcom_psc_gen_bd_tx_init(psc_id, 10, fifo); - if (!psc_dma->capture.bcom_task || - !psc_dma->playback.bcom_task) { - dev_err(&op->dev, "Could not allocate bestcomm tasks\n"); - iounmap(regs); - kfree(psc_dma); - 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_dma->psc_regs->isr_imr.imr, 0); - out_8(&psc_dma->psc_regs->command, 3 << 4); /* reset transmitter */ - out_8(&psc_dma->psc_regs->command, 2 << 4); /* reset receiver */ - out_8(&psc_dma->psc_regs->command, 1 << 4); /* reset mode */ - out_8(&psc_dma->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_dma->sicr = MPC52xx_PSC_SICR_DTS1 | MPC52xx_PSC_SICR_I2S | MPC52xx_PSC_SICR_CLKPOL; - if (of_get_property(op->node, "fsl,cellslave", NULL)) - psc_dma->sicr |= MPC52xx_PSC_SICR_CELLSLAVE | - MPC52xx_PSC_SICR_GENCLK; out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr | MPC52xx_PSC_SICR_SIM_CODEC_8);
@@ -321,66 +184,37 @@ static int __devinit psc_i2s_of_probe(struct of_device *op, 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_dma->psc_regs->mode, 0); - out_8(&psc_dma->psc_regs->mode, 0); - - /* Set the TX and RX fifo alarm thresholds */ - out_be16(&psc_dma->fifo_regs->rfalarm, 0x100); - out_8(&psc_dma->fifo_regs->rfcntl, 0x4); - out_be16(&psc_dma->fifo_regs->tfalarm, 0x100); - out_8(&psc_dma->fifo_regs->tfcntl, 0x7); - - /* Lookup the IRQ numbers */ - psc_dma->playback.irq = - bcom_get_task_irq(psc_dma->playback.bcom_task); - psc_dma->capture.irq = - bcom_get_task_irq(psc_dma->capture.bcom_task); - - /* Save what we've done so it can be found again later */ - dev_set_drvdata(&op->dev, psc_dma); - - /* Register the SYSFS files */ - rc = device_create_file(psc_dma->dev, &dev_attr_status); - rc |= device_create_file(psc_dma->dev, &dev_attr_capture_overrun); - rc |= device_create_file(psc_dma->dev, &dev_attr_playback_underrun); - if (rc) - dev_info(psc_dma->dev, "error creating sysfs files\n"); - - snd_soc_register_platform(&psc_dma_pcm_soc_platform); - - /* Tell the ASoC OF helpers about it */ - of_snd_soc_register_platform(&psc_dma_pcm_soc_platform, op->node, - &psc_dma->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(®s->ipcr_acr.ipcr) & 0x80) != 0) + ; + /* then wait for the transition to high */ + while ((in_8(®s->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_dma *psc_dma = dev_get_drvdata(&op->dev); - - dev_dbg(&op->dev, "psc_i2s_remove()\n"); - - snd_soc_unregister_platform(&psc_dma_pcm_soc_platform); - - bcom_gen_bd_rx_release(psc_dma->capture.bcom_task); - bcom_gen_bd_tx_release(psc_dma->playback.bcom_task); - - iounmap(psc_dma->psc_regs); - iounmap(psc_dma->fifo_regs); - kfree(psc_dma); - 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); @@ -411,4 +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");
diff --git a/sound/soc/fsl/mpc5200_psc_i2s.h b/sound/soc/fsl/mpc5200_psc_i2s.h new file mode 100644 index 0000000..ce55e07 --- /dev/null +++ b/sound/soc/fsl/mpc5200_psc_i2s.h @@ -0,0 +1,12 @@ +/* + * Freescale MPC5200 PSC in I2S mode + * ALSA SoC Digital Audio Interface (DAI) driver + * + */ + +#ifndef __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__ +#define __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__ + +extern struct snd_soc_dai psc_i2s_dai[]; + +#endif /* __SOUND_SOC_FSL_MPC52xx_PSC_I2S_H__ */