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Date: Thu, 6 Jan 2011 16:05:19 +0800
From: "Guan Xuetao" <guanxuetao@...c.pku.edu.cn>
To: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [PATCHv1 0/8] unicore32 machine related files: summary
[PATCHv1 6/8] unicore32 machine related files: ac97
From: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
Patch 6 implements ac97 driver.
Signed-off-by: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
---
drivers/staging/puv3/puv3_ac97.c | 383 ++++++++++++++++++++++++++++++++
drivers/staging/puv3/puv3_pcm.c | 449 ++++++++++++++++++++++++++++++++++++++
drivers/staging/puv3/puv3_pcm.h | 33 +++
3 files changed, 865 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/puv3/puv3_ac97.c b/drivers/staging/puv3/puv3_ac97.c
new file mode 100644
index 0000000..f02707e
--- /dev/null
+++ b/drivers/staging/puv3/puv3_ac97.c
@@ -0,0 +1,383 @@
+/*
+ * linux/drivers/staging/puv3/puv3_ac97.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Maintained by GUAN Xue-tao <gxt@...c.pku.edu.cn>
+ * Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on: sound/arm/pxa2xx-ac97.c
+ *
+ * Contributors & Additions/Fixes:
+ * 2009-07-30: enhance the PM support, resume/suspend can operate
+ * while ac97 is working by ZHONG Qi
+ * 2009-07-23: cause the ac97's flaw, only support fix sample rate
+ * by ZHONG Qi
+ * 2009-07-23: add ac97 PM support by ZHONG Qi
+ * 2009-03-11: First version by ZHONG Qi
+ *
+ * TODO:
+ * 1. local_ac97_read, local_ac97_write and puv3_codec_regs
+ * are involved for fixing bug, about reseting codec automatically
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+
+#include <asm/irq.h>
+#include <linux/mutex.h>
+#include <asm/mach/hardware.h>
+
+#include "puv3_pcm.h"
+
+static DEFINE_MUTEX(car_mutex);
+
+typedef struct {
+ int (*startup)(struct snd_pcm_substream *, void *);
+ void (*shutdown)(struct snd_pcm_substream *, void *);
+ void (*suspend)(void *);
+ void (*resume)(void *);
+ void *priv;
+} puv3_audio_ops_t;
+
+unsigned short puv3_codec_regs[64] = {
+ 0x5990, 0x8000, 0x8000, 0x8000, 0x0000, 0x8000, 0x8008, 0x8008,
+ 0x8808, 0x8808, 0x8808, 0x8808, 0x8808, 0x0000, 0x8000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x000f, 0x0607, 0x0410, 0xbb80, 0x0000,
+ 0x0000, 0xbb80, 0x0000, 0x0000, 0x0000, 0x2000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x2000, 0x2000, 0x000d,
+ 0x044c, 0x044c, 0x0800, 0x0800, 0x0003, 0x0000, 0x0000, 0X4740,
+};
+
+/* TODO This is unnecessary, except for fixing bug */
+unsigned short local_ac97_read(unsigned short reg)
+{
+ return puv3_codec_regs[reg/2];
+}
+
+/* TODO This is unnecessary, except for fixing bug */
+void local_ac97_write(unsigned short reg, unsigned short val)
+{
+ int i = 1000;
+
+ puv3_codec_regs[reg/2] = val;
+
+ PKUNITY_AC97_CRAC = AC97_CODEC_REG(reg) | AC97_CODEC_VAL(val);
+
+ while (!(PKUNITY_AC97_CONR & AC97_CODEC_WRITECOMPLETE)) {
+ if (!(i--)) {
+ printk(KERN_WARNING "AC97: %s timeout\n", __func__);
+ break;
+ }
+ udelay(1);
+ }
+}
+
+static unsigned short puv3_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
+{
+ return puv3_codec_regs[reg/2];
+}
+
+static void puv3_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ int i = 1000;
+
+ mutex_lock(&car_mutex);
+
+ if (reg == 0x2 || reg == 0x18)
+ puv3_codec_regs[reg/2] = val & 0x9F1F;
+ else
+ puv3_codec_regs[reg/2] = val;
+
+ PKUNITY_AC97_CRAC = AC97_CODEC_REG(reg) | AC97_CODEC_VAL(val);
+
+ while (!(PKUNITY_AC97_CONR & AC97_CODEC_WRITECOMPLETE)) {
+ if (!(i--)) {
+ printk(KERN_WARNING "AC97: %s timeout\n", __func__);
+ break;
+ }
+ udelay(1);
+ }
+
+ mutex_unlock(&car_mutex);
+}
+
+static void puv3_ac97_reset(struct snd_ac97 *ac97)
+{
+/* int i = 3;
+
+ PKUNITY_AC97_CONR = AC97_CMD_RESET;
+reset:
+ msleep(1);
+
+ if ((PKUNITY_AC97_CONR & 0x2) == 2) {
+ msleep(1);
+ PKUNITY_AC97_CONR = 0x1;
+ if (i--)
+ goto reset;
+ else {
+ ac97_reset_err = -1;
+ printk("AC97 reset error!\n");
+ }
+ }
+*/
+}
+
+static struct snd_ac97_bus_ops puv3_ac97_ops = {
+ .read = puv3_ac97_read,
+ .write = puv3_ac97_write,
+ .reset = puv3_ac97_reset,
+};
+
+static struct puv3_pcm_dma_params puv3_ac97_pcm_out = {
+ .name = "AC97 PCM out",
+ .dev_addr = PKUNITY_AC97_BASE + 0x20, /* OUT FIFO */
+};
+
+static struct puv3_pcm_dma_params puv3_ac97_pcm_in = {
+ .name = "AC97 PCM in",
+ .dev_addr = PKUNITY_AC97_BASE + 0x30, /* IN FIFO */
+};
+
+static struct snd_pcm *puv3_ac97_pcm;
+static struct snd_ac97 *puv3_ac97_ac97;
+
+static int puv3_ac97_pcm_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ puv3_audio_ops_t *platform_ops;
+ int r;
+
+ runtime->hw.channels_min = 2;
+ runtime->hw.channels_max = 2;
+
+ r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
+
+ platform_ops = substream->pcm->card->dev->platform_data;
+ if (platform_ops && platform_ops->startup)
+ return platform_ops->startup(substream, platform_ops->priv);
+ else
+ return 0;
+}
+
+static void puv3_ac97_pcm_shutdown(struct snd_pcm_substream *substream)
+{
+ puv3_audio_ops_t *platform_ops;
+
+ platform_ops = substream->pcm->card->dev->platform_data;
+ if (platform_ops && platform_ops->shutdown)
+ platform_ops->shutdown(substream, platform_ops->priv);
+}
+
+static int puv3_ac97_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
+ return snd_ac97_set_rate(puv3_ac97_ac97, reg, runtime->rate);
+}
+
+static struct puv3_pcm_client puv3_ac97_pcm_client = {
+ .playback_params = &puv3_ac97_pcm_out,
+ .capture_params = &puv3_ac97_pcm_in,
+ .startup = puv3_ac97_pcm_startup,
+ .shutdown = puv3_ac97_pcm_shutdown,
+ .prepare = puv3_ac97_pcm_prepare,
+};
+
+#ifdef CONFIG_PM
+
+static unsigned long ac97_regs[2];
+static unsigned long ac97_dma_regs[4];
+int ac97_dma_ch = 0;
+
+static int puv3_ac97_do_suspend(struct snd_card *card, pm_message_t state)
+{
+ puv3_audio_ops_t *platform_ops = card->dev->platform_data;
+
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
+ snd_pcm_suspend_all(puv3_ac97_pcm);
+ snd_ac97_suspend(puv3_ac97_ac97);
+ if (platform_ops && platform_ops->suspend)
+ platform_ops->suspend(platform_ops->priv);
+
+ /* store DMA & ac97 */
+ ac97_dma_regs[0] = DMAC_SRCADDR(ac97_dma_ch);
+ ac97_dma_regs[1] = DMAC_DESTADDR(ac97_dma_ch);
+ ac97_dma_regs[2] = DMAC_CONTROL(ac97_dma_ch);
+ ac97_dma_regs[3] = DMAC_CONFIG(ac97_dma_ch);
+
+ ac97_regs[0] = PKUNITY_AC97_OUT_FIFO;
+ ac97_regs[1] = PKUNITY_AC97_IN_FIFO;
+
+ return 0;
+}
+
+static int puv3_ac97_do_resume(struct snd_card *card)
+{
+ puv3_audio_ops_t *platform_ops = card->dev->platform_data;
+ int i;
+
+ if (platform_ops && platform_ops->resume)
+ platform_ops->resume(platform_ops->priv);
+ snd_ac97_resume(puv3_ac97_ac97);
+ snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+ /* restore DMA & codec & AC97 */
+
+ DMAC_SRCADDR(ac97_dma_ch) = ac97_dma_regs[0];
+ DMAC_DESTADDR(ac97_dma_ch) = ac97_dma_regs[1];
+ DMAC_CONTROL(ac97_dma_ch) = ac97_dma_regs[2];
+ DMAC_CONFIG(ac97_dma_ch) = ac97_dma_regs[3];
+
+ for (i = 0; i < 64; i++)
+ local_ac97_write(i*2, puv3_codec_regs[i]);
+
+ PKUNITY_AC97_OCR = AC97_CMD_VPSAMPLE; /* phone @ var sample rate */
+ PKUNITY_AC97_ICR = AC97_CMD_FCSAMPLE; /* mic @ fix sample rate */
+ PKUNITY_AC97_ENABLE = AC97_CMD_ENABLE;
+
+ local_ac97_write(0x2, 0x0000);
+
+ PKUNITY_AC97_OUT_FIFO = ac97_regs[0];
+ PKUNITY_AC97_IN_FIFO = ac97_regs[1];
+
+ return 0;
+}
+
+static int puv3_ac97_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct snd_card *card = platform_get_drvdata(dev);
+ int ret = 0;
+
+ if (card)
+ ret = puv3_ac97_do_suspend(card, PMSG_SUSPEND);
+
+ return ret;
+}
+
+static int puv3_ac97_resume(struct platform_device *dev)
+{
+ struct snd_card *card = platform_get_drvdata(dev);
+ int ret = 0;
+
+ if (card)
+ ret = puv3_ac97_do_resume(card);
+
+ return ret;
+}
+
+#else
+#define puv3_ac97_suspend NULL
+#define puv3_ac97_resume NULL
+#endif
+
+static int __devinit puv3_ac97_probe(struct platform_device *dev)
+{
+ struct snd_card *card;
+ struct snd_ac97_bus *ac97_bus;
+ struct snd_ac97_template ac97_template;
+ int ret;
+
+ ret = -ENOMEM;
+ if (snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, 0, &card) < 0)
+ goto err;
+
+ card->dev = &dev->dev;
+ strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver));
+
+ ret = puv3_pcm_new(card, &puv3_ac97_pcm_client, &puv3_ac97_pcm);
+ if (ret)
+ goto err;
+
+ ret = snd_ac97_bus(card, 0, &puv3_ac97_ops, NULL, &ac97_bus);
+ if (ret)
+ goto err;
+ memset(&ac97_template, 0, sizeof(ac97_template));
+ ret = snd_ac97_mixer(ac97_bus, &ac97_template, &puv3_ac97_ac97);
+ if (ret)
+ goto err;
+
+ snprintf(card->shortname, sizeof(card->shortname),
+ "%s", snd_ac97_get_short_name(puv3_ac97_ac97));
+ snprintf(card->longname, sizeof(card->longname),
+ "%s (%s)", dev->dev.driver->name, card->mixername);
+
+ snd_card_set_dev(card, &dev->dev);
+ ret = snd_card_register(card);
+ if (ret == 0) {
+ platform_set_drvdata(dev, card);
+ /* phone @ var sample rate */
+ PKUNITY_AC97_OCR = AC97_CMD_VPSAMPLE;
+ /* mic @ fix sample rate */
+ PKUNITY_AC97_ICR = AC97_CMD_FCSAMPLE;
+ PKUNITY_AC97_ENABLE = AC97_CMD_ENABLE;
+ return 0;
+ }
+
+err:
+ if (card)
+ snd_card_free(card);
+ return ret;
+}
+
+static int __devexit puv3_ac97_remove(struct platform_device *dev)
+{
+ struct snd_card *card = platform_get_drvdata(dev);
+
+ PKUNITY_AC97_ENABLE = AC97_CMD_DISABLE;
+
+ if (card) {
+ snd_card_free(card);
+ platform_set_drvdata(dev, NULL);
+ }
+
+ return 0;
+}
+
+static struct platform_driver puv3_ac97_driver = {
+ .probe = puv3_ac97_probe,
+ .remove = __devexit_p(puv3_ac97_remove),
+ .suspend = puv3_ac97_suspend,
+ .resume = puv3_ac97_resume,
+ .driver = {
+ .name = "PKUnity-v3-AC97",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init puv3_ac97_init(void)
+{
+ return platform_driver_register(&puv3_ac97_driver);
+}
+
+static void __exit puv3_ac97_exit(void)
+{
+ platform_driver_unregister(&puv3_ac97_driver);
+}
+
+module_init(puv3_ac97_init);
+module_exit(puv3_ac97_exit);
+MODULE_AUTHOR("ZHONG Qi");
+MODULE_DESCRIPTION("AC97 driver for the PKUNITY chip");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/puv3/puv3_pcm.c b/drivers/staging/puv3/puv3_pcm.c
new file mode 100644
index 0000000..53ce7dc
--- /dev/null
+++ b/drivers/staging/puv3/puv3_pcm.c
@@ -0,0 +1,449 @@
+/*
+ * linux/drivers/staging/puv3/puv3_pcm.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Maintained by GUAN Xue-tao <gxt@...c.pku.edu.cn>
+ * Copyright (C) 2001-2010 Guan Xuetao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on: sound/arm/pxa2xx-pcm.c
+ *
+ * Contributors & Additions/Fixes:
+ * 2009-07-30: 1. increase the size of dma_buffer for vphone's performance
+ * 2. fix the XRUN bug by setting the dma buffer counter to zero
+ * by ZHONG Qi
+ * 2009-07-23: cause the ac97's flaw, only support fix sample rate
+ * by ZHONG Qi
+ * 2009-03-11: First version by ZHONG Qi
+ *
+ * TODO:
+ * 1. local_ac97_read, local_ac97_write and puv3_codec_regs
+ * are involved for fixing bug, about reseting codec automatically
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/irqreturn.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include <asm/irq.h>
+#include <asm/mach/dma.h>
+#include <asm/mach/hardware.h>
+
+#include "puv3_pcm.h"
+
+#define COUNTER_SIZE 16
+#define PERIOD_SIZE (4 * 1024)
+
+static void kick_dma(int, struct snd_pcm_substream *);
+static unsigned long next_counter(unsigned long);
+
+static const struct snd_pcm_hardware puv3_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .period_bytes_min = PERIOD_SIZE,
+ .period_bytes_max = PERIOD_SIZE,
+ .periods_min = 1,
+ .periods_max = COUNTER_SIZE, /* 2 */
+ .buffer_bytes_max = COUNTER_SIZE * PERIOD_SIZE, /* 8 * 1024 */
+ .fifo_size = 32,
+};
+
+struct puv3_runtime_data {
+ struct puv3_pcm_dma_params *params;
+ unsigned long buffer_counter;
+ size_t period;
+ int dma_lock;
+ int dma_ch;
+ /* TODO add other filed */
+};
+
+static unsigned long next_counter(unsigned long buffer_counter)
+{
+ return ++buffer_counter % COUNTER_SIZE;
+}
+
+static void reload_dma(int dma_ch, struct snd_pcm_substream *substream,
+ struct snd_pcm_runtime *runtime,
+ struct puv3_runtime_data *rtd)
+{
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ local_ac97_write(0x2, puv3_codec_regs[0x2/2]);
+ local_ac97_write(0x18, puv3_codec_regs[0x18/2]);
+ local_ac97_write(0x2a, puv3_codec_regs[0x2a/2]);
+ local_ac97_write(0x2c, puv3_codec_regs[0x2c/2]);
+
+ DMAC_SRCADDR(dma_ch) = runtime->dma_addr +
+ rtd->buffer_counter * rtd->period;
+ DMAC_DESTADDR(dma_ch) = rtd->params->dev_addr;
+ DMAC_CONTROL(dma_ch) = DMAC_CONTROL_SIZE_WORD(rtd->period) |
+ DMAC_CONTROL_SI |
+ DMAC_CONTROL_BURST_8BYTE;
+ DMAC_CONFIG(dma_ch) = DMAC_CONFIG_AC97WR;
+ } else {
+ local_ac97_write(0x1C, puv3_codec_regs[0x1C/2]);
+
+ DMAC_DESTADDR(rtd->dma_ch) = runtime->dma_addr +
+ rtd->buffer_counter * rtd->period;
+ DMAC_SRCADDR(rtd->dma_ch) = rtd->params->dev_addr;
+ DMAC_CONTROL(rtd->dma_ch) = DMAC_CONTROL_SIZE_WORD(rtd->period)
+ | DMAC_CONTROL_DI
+ | DMAC_CONTROL_BURST_8BYTE;
+ DMAC_CONFIG(rtd->dma_ch) = DMAC_CONFIG_AC97RD;
+ }
+}
+
+static void kick_dma(int dma_ch, struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct puv3_runtime_data *rtd;
+
+ runtime = substream->runtime;
+ rtd = runtime->private_data;
+
+ rtd->buffer_counter = next_counter(rtd->buffer_counter);
+
+ reload_dma(dma_ch, substream, runtime, rtd);
+
+ puv3_resume_dma(dma_ch);
+
+ return;
+}
+
+static void reset_dma(int dma_ch, struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct puv3_runtime_data *rtd;
+
+ puv3_stop_dma(dma_ch);
+
+ runtime = substream->runtime;
+ rtd = runtime->private_data;
+
+ rtd->buffer_counter = 0;
+
+ reload_dma(dma_ch, substream, runtime, rtd);
+
+ return;
+}
+
+static int puv3_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct puv3_runtime_data *rtd = runtime->private_data;
+ size_t period = params_period_bytes(params);
+ size_t totsize = params_buffer_bytes(params);
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+ runtime->dma_bytes = totsize;
+
+ rtd->period = period;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ DMAC_SRCADDR(rtd->dma_ch) = runtime->dma_addr +
+ rtd->buffer_counter * rtd->period;
+ DMAC_DESTADDR(rtd->dma_ch) = rtd->params->dev_addr;
+ DMAC_CONTROL(rtd->dma_ch) = DMAC_CONTROL_SIZE_WORD(rtd->period)
+ | DMAC_CONTROL_SI
+ | DMAC_CONTROL_BURST_8BYTE;
+ DMAC_CONFIG(rtd->dma_ch) = DMAC_CONFIG_AC97WR;
+ } else {
+ DMAC_DESTADDR(rtd->dma_ch) = runtime->dma_addr +
+ rtd->buffer_counter * rtd->period;
+ DMAC_SRCADDR(rtd->dma_ch) = rtd->params->dev_addr;
+ DMAC_CONTROL(rtd->dma_ch) = DMAC_CONTROL_SIZE_WORD(rtd->period)
+ | DMAC_CONTROL_DI
+ | DMAC_CONTROL_BURST_8BYTE;
+ DMAC_CONFIG(rtd->dma_ch) = DMAC_CONFIG_AC97RD;
+ }
+
+ return 0;
+}
+
+static int puv3_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct puv3_runtime_data *rtd = runtime->private_data;
+
+ puv3_stop_dma(rtd->dma_ch);
+ snd_pcm_set_runtime_buffer(substream, NULL);
+
+ return 0;
+}
+
+static int puv3_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct puv3_pcm_client *client = substream->private_data;
+ return client->prepare(substream);
+}
+
+static int puv3_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct puv3_runtime_data *rtd = runtime->private_data;
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ rtd->dma_lock = 0;
+ puv3_resume_dma(rtd->dma_ch);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ rtd->dma_lock = 1;
+ ac97_dma_ch = rtd->dma_ch;
+ reset_dma(rtd->dma_ch, substream);
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ puv3_resume_dma(rtd->dma_ch);
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static void puv3_pcm_dma_irq(int dma_ch, void *dev_id)
+{
+ struct snd_pcm_substream *substream = dev_id;
+ struct puv3_runtime_data *rtd = substream->runtime->private_data;
+
+ if (!rtd->dma_lock)
+ kick_dma(dma_ch, substream);
+
+ snd_pcm_period_elapsed(substream);
+}
+
+static snd_pcm_uframes_t puv3_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct puv3_runtime_data *rtd = substream->runtime->private_data;
+ dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ DMAC_SRCADDR(rtd->dma_ch) : DMAC_DESTADDR(rtd->dma_ch);
+ snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
+ if (x == runtime->buffer_size)
+ x = 0;
+ return x;
+}
+
+static int puv3_pcm_hw_rule_mult32(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_interval *i = hw_param_interval(params, rule->var);
+ int changed = 0;
+
+ if (i->min & 31) {
+ i->min = (i->min & ~31) + 32;
+ i->openmin = 0;
+ changed = 1;
+ }
+
+ if (i->max & 31) {
+ i->max &= ~31;
+ i->openmax = 0;
+ changed = 1;
+ }
+
+ return changed;
+}
+
+static int puv3_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct puv3_pcm_client *client = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct puv3_runtime_data *rtd;
+ int ret = 0;
+
+ runtime->hw = puv3_pcm_hardware;
+
+ /*
+ * For mysterious reasons (and despite what the manual says)
+ * playback samples are lost if the DMA count is not a multiple
+ * of the DMA burst size. Let's add a rule to enforce that.
+ */
+ ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+ puv3_pcm_hw_rule_mult32, NULL,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, -1);
+ if (ret)
+ goto out;
+ ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+ puv3_pcm_hw_rule_mult32, NULL,
+ SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
+ if (ret)
+ goto out;
+
+ ret = -ENOMEM;
+ rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
+ if (!rtd)
+ goto out;
+
+ rtd->buffer_counter = 0;
+ rtd->dma_lock = 0;
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* TODO unnecessary */
+ local_ac97_write(0x2, 0x0000);
+
+ } else {
+ local_ac97_write(0x1A, 0);
+ local_ac97_write(0x1C, 0x0f0f);
+ }
+
+ rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ client->playback_params : client->capture_params;
+ ret = puv3_request_dma(rtd->params->name, DMA_PRIO_HIGH,
+ puv3_pcm_dma_irq, NULL, substream);
+ if (ret < 0)
+ goto err;
+ rtd->dma_ch = ret;
+
+ runtime->private_data = rtd;
+ ret = client->startup(substream);
+ if (!ret)
+ goto out;
+
+ puv3_free_dma(rtd->dma_ch);
+ err:
+ kfree(rtd);
+ out:
+ return ret;
+}
+
+static int puv3_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct puv3_pcm_client *client = substream->private_data;
+ struct puv3_runtime_data *rtd = substream->runtime->private_data;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ local_ac97_write(0x1A, 0);
+ local_ac97_write(0x1C, 0x8000);
+ }
+
+ puv3_free_dma(rtd->dma_ch);
+ client->shutdown(substream);
+ kfree(rtd);
+
+ return 0;
+}
+
+static struct snd_pcm_ops puv3_pcm_ops = {
+ .open = puv3_pcm_open,
+ .close = puv3_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = puv3_pcm_hw_params,
+ .hw_free = puv3_pcm_hw_free,
+ .prepare = puv3_pcm_prepare,
+ .trigger = puv3_pcm_trigger,
+ .pointer = puv3_pcm_pointer,
+};
+
+static int puv3_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+ size_t size = puv3_pcm_hardware.buffer_bytes_max;
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = pcm->card->dev;
+ buf->private_data = NULL;
+ buf->area = dma_alloc_coherent(pcm->card->dev, size,
+ &buf->addr, GFP_KERNEL);
+ dma_cache_sync(pcm->card->dev, &buf->addr, size, DMA_BIDIRECTIONAL);
+ if (!buf->area)
+ return -ENOMEM;
+ buf->bytes = size;
+ return 0;
+}
+
+static void puv3_pcm_free_dma_buffers(struct snd_pcm *pcm)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_dma_buffer *buf;
+ int stream;
+
+ for (stream = 0; stream < 2; stream++) {
+ substream = pcm->streams[stream].substream;
+ if (!substream)
+ continue;
+ buf = &substream->dma_buffer;
+ if (!buf->area)
+ continue;
+ dma_free_coherent(pcm->card->dev, buf->bytes,
+ buf->area, buf->addr);
+ buf->area = NULL;
+ }
+}
+
+static u64 puv3_pcm_dmamask = 0xffffffff;
+
+int puv3_pcm_new(struct snd_card *card, struct puv3_pcm_client *client,
+ struct snd_pcm **rpcm)
+{
+ struct snd_pcm *pcm;
+ int play = client->playback_params ? 1 : 0;
+ int capt = client->capture_params ? 1 : 0;
+ int ret;
+
+ ret = snd_pcm_new(card, "PKUNITY-PCM", 0, play, capt, &pcm);
+ if (ret)
+ goto out;
+
+ pcm->private_data = client;
+ pcm->private_free = puv3_pcm_free_dma_buffers;
+
+ if (!card->dev->dma_mask)
+ card->dev->dma_mask = &puv3_pcm_dmamask;
+ if (!card->dev->coherent_dma_mask)
+ card->dev->coherent_dma_mask = 0xffffffff;
+
+ if (play) {
+ int stream = SNDRV_PCM_STREAM_PLAYBACK;
+ snd_pcm_set_ops(pcm, stream, &puv3_pcm_ops);
+ ret = puv3_pcm_preallocate_dma_buffer(pcm, stream);
+ if (ret)
+ goto out;
+ }
+ if (capt) {
+ int stream = SNDRV_PCM_STREAM_CAPTURE;
+ snd_pcm_set_ops(pcm, stream, &puv3_pcm_ops);
+ ret = puv3_pcm_preallocate_dma_buffer(pcm, stream);
+ if (ret)
+ goto out;
+ }
+
+ if (rpcm)
+ *rpcm = pcm;
+ ret = 0;
+
+ out:
+ return ret;
+}
+EXPORT_SYMBOL(puv3_pcm_new);
+
+MODULE_AUTHOR("ZHONG Qi");
+MODULE_DESCRIPTION("PKUNITY PCM DMA module");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/puv3/puv3_pcm.h b/drivers/staging/puv3/puv3_pcm.h
new file mode 100644
index 0000000..aa9be9b
--- /dev/null
+++ b/drivers/staging/puv3/puv3_pcm.h
@@ -0,0 +1,33 @@
+/*
+ * linux/drivers/staging/puv3/puv3_pcm.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on: sound/arm/pxa2xx-pcm.h
+ *
+ * Contributors & Additions/Fixes:
+ * 2009-03-11: First version by ZHONG Qi
+ */
+
+struct puv3_pcm_dma_params {
+ char *name; /* stream identifier */
+ u32 dev_addr; /* device physical address for DMA */
+};
+
+struct puv3_pcm_client {
+ struct puv3_pcm_dma_params *playback_params;
+ struct puv3_pcm_dma_params *capture_params;
+ int (*startup)(struct snd_pcm_substream *);
+ void (*shutdown)(struct snd_pcm_substream *);
+ int (*prepare)(struct snd_pcm_substream *);
+};
+
+extern int puv3_pcm_new(struct snd_card *, struct puv3_pcm_client *,
+ struct snd_pcm **);
+extern void local_ac97_write(unsigned short, unsigned short);
+extern unsigned short local_ac97_read(unsigned short);
+extern unsigned short puv3_codec_regs[];
+extern int ac97_dma_ch;
+
> -----Original Message-----
> From: linux-arch-owner@...r.kernel.org [mailto:linux-arch-owner@...r.kernel.org] On Behalf Of Guan Xuetao
> Sent: Thursday, January 06, 2011 3:57 PM
> To: linux-arch@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCHv1 0/8] unicore32 machine related files: summary
>
> From: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
>
> The whole patch could be fetched from:
> git://git.kernel.org/pub/scm/linux/kernel/git/epip/unicore32.git
> with branch name: unicore32.
> And it is divided into three patch sets: core architecture files,
> additional architecture files, and machine related files.
>
> This patch set adds the machine related files for UniCore32 ISA and PKUnity SoC.
>
> Patch 1 adds machine related core files, also including build infrastructure.
>
> Patch 2 add all hardware registers definitions, which are not split and inserted into
> different drivers.
>
> Patch 3 implements arch-specific pci bus driver.
>
> Patch 4 implements arch-specific ps2 dirver.
>
> Patch 5 implements frame buffer driver.
>
> Patch 6 implements ac97 driver.
>
> Patch 7 implements arch-specific i2c bus driver.
>
> Patch 8 implements network driver.
>
> Signed-off-by: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
> ---
> arch/unicore32/include/asm/mach/PKUnity.h | 104 ++
> arch/unicore32/include/asm/mach/bitfield.h | 24 +
> arch/unicore32/include/asm/mach/hardware.h | 45 +
> arch/unicore32/include/asm/mach/regs-ac97.h | 32 +
> arch/unicore32/include/asm/mach/regs-dmac.h | 81 +
> arch/unicore32/include/asm/mach/regs-gpio.h | 70 +
> arch/unicore32/include/asm/mach/regs-i2c.h | 63 +
> arch/unicore32/include/asm/mach/regs-intc.h | 28 +
> arch/unicore32/include/asm/mach/regs-nand.h | 79 +
> arch/unicore32/include/asm/mach/regs-ost.h | 92 ++
> arch/unicore32/include/asm/mach/regs-pci.h | 94 ++
> arch/unicore32/include/asm/mach/regs-pm.h | 126 ++
> arch/unicore32/include/asm/mach/regs-ps2.h | 20 +
> arch/unicore32/include/asm/mach/regs-resetc.h | 34 +
> arch/unicore32/include/asm/mach/regs-rtc.h | 37 +
> arch/unicore32/include/asm/mach/regs-sdc.h | 156 ++
> arch/unicore32/include/asm/mach/regs-spi.h | 98 ++
> arch/unicore32/include/asm/mach/regs-uart.h | 3 +
> arch/unicore32/include/asm/mach/regs-umal.h | 229 +++
> arch/unicore32/include/asm/mach/regs-unigfx.h | 200 +++
> arch/unicore32/include/asm/pci.h | 46 +
> arch/unicore32/kernel/pci.c | 404 +++++
> arch/unicore32/kernel/puv3-core.c | 266 ++++
> arch/unicore32/kernel/puv3-nb0916.c | 183 +++
> arch/unicore32/kernel/puv3-smw0919.c | 120 ++
> drivers/input/keyboard/Kconfig | 11 +
> drivers/input/keyboard/atkbd.c | 4 +
> drivers/input/mouse/psmouse-base.c | 41 +
> drivers/input/serio/i8042.h | 2 +
> drivers/pci/Makefile | 1 +
> drivers/staging/puv3/Kconfig | 142 ++
> drivers/staging/puv3/Makefile | 27 +
> drivers/staging/puv3/TODO | 7 +
> drivers/staging/puv3/i8042-ucio.h | 96 ++
> drivers/staging/puv3/nb0916-atkbd.h | 43 +
> drivers/staging/puv3/puv3_ac97.c | 383 +++++
> drivers/staging/puv3/puv3_i2c.c | 325 ++++
> drivers/staging/puv3/puv3_pcm.c | 449 ++++++
> drivers/staging/puv3/puv3_pcm.h | 33 +
> drivers/staging/puv3/puv3_umal.c | 2082 +++++++++++++++++++++++++
> drivers/staging/puv3/puv3_unifb.c | 972 ++++++++++++
> include/linux/fb.h | 2 +
> 42 files changed, 7254 insertions(+), 0 deletions(-)
>
> --
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