[alsa-devel] [PATCH] Add AC'97 driver for AT91SAM9263ek atmel board.
Sedji Gaouaou
sedji.gaouaou at atmel.com
Wed Oct 1 18:24:12 CEST 2008
Add AC'97 driver for AT91SAM9263ek atmel board.
The driver includes the playback and the capture.
Signed-off-by: Sedji Gaouaou <sedji.gaouaou at atmel.com>
---
sound/arm/Kconfig | 9 +
sound/arm/Makefile | 4 +
sound/arm/at91-ac97.c | 912 +++++++++++++++++++++++++++++++++++++++++++++++++
sound/arm/at91-ac97.h | 295 ++++++++++++++++
4 files changed, 1220 insertions(+), 0 deletions(-)
create mode 100644 sound/arm/at91-ac97.c
create mode 100644 sound/arm/at91-ac97.h
diff --git a/sound/arm/Kconfig b/sound/arm/Kconfig
index f8e6de4..bfe12f7 100644
--- a/sound/arm/Kconfig
+++ b/sound/arm/Kconfig
@@ -50,5 +50,14 @@ config SND_PXA2XX_AC97
Say Y or M if you want to support any AC97 codec attached to
the PXA2xx AC97 interface.
+config SND_AT91_AC97
+ tristate "AC97 Controller driver for SAM926X familly from ATMEL"
+ depends on SND && ARCH_AT91
+ select SND_PCM
+ select SND_AC97_CODEC
+ help
+ Say Y or M if you want to support any AC97 codec attached to
+ the SAM926X AC97 Controller.
+
endif # SND_ARM
diff --git a/sound/arm/Makefile b/sound/arm/Makefile
index 2054de1..73fc74b 100644
--- a/sound/arm/Makefile
+++ b/sound/arm/Makefile
@@ -17,3 +17,7 @@ snd-pxa2xx-lib-$(CONFIG_SND_PXA2XX_LIB_AC97) += pxa2xx-ac97-lib.o
obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o
snd-pxa2xx-ac97-objs := pxa2xx-ac97.o
+
+obj-$(CONFIG_SND_AT91_AC97) += snd-at91-ac97.o
+snd-at91-ac97-objs := at91-ac97.o
+
diff --git a/sound/arm/at91-ac97.c b/sound/arm/at91-ac97.c
new file mode 100644
index 0000000..3dcf742
--- /dev/null
+++ b/sound/arm/at91-ac97.c
@@ -0,0 +1,912 @@
+/*
+ * at91-ac97.c -- AC'97 driver for atmel boards.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2006 Atmel
+ *
+ * Author: Patrice Vilchez <patrice.vilchez at atmel.com>
+ * Sedji Gaouaou <sedji.gaouaou at atmel.com>
+ * ATMEL CORP.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/atmel_pdc.h>
+#include <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/ac97_codec.h>
+#include <sound/soc.h>
+
+#include <asm/cacheflush.h>
+
+#include <mach/hardware.h>
+#include <mach/gpio.h>
+#include <mach/board.h>
+
+#include "at91-ac97.h"
+
+
+/*
+ * module parameters
+ */
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for AC97 controller");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for AC97 controller");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable AC97 controller");
+
+typedef struct at91_ac97 {
+ spinlock_t lock;
+ void *regs;
+ int period;
+ struct clk *ac97_clk;
+ struct snd_pcm_substream *playback_substream;
+ struct snd_pcm_substream *capture_substream;
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ struct snd_ac97 *ac97;
+ struct snd_ac97_bus *ac97_bus;
+ int irq;
+ struct platform_device *pdev;
+ u8 reset_pin;
+} at91_ac97_t;
+
+
+/*
+ * PIO management functions
+ */
+void at91_ac97c_drive_reset(at91_ac97_t *chip, unsigned int value)
+{
+ at91_set_gpio_value(chip->reset_pin, value);
+}
+
+static const char driver_name[] = "at91-ac97";
+
+
+/*
+ * PCM part
+ */
+static struct snd_pcm_hardware snd_at91_ac97_playback_hw = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_BLOCK_TRANSFER),
+ .formats = (SNDRV_PCM_FMTBIT_S16_LE
+ | SNDRV_PCM_FMTBIT_S16_BE),
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 256*1024,
+ .period_bytes_min = 1024,
+ .period_bytes_max = 4*1024,
+ .periods_min = 1,
+ .periods_max = 64,
+};
+
+static struct snd_pcm_hardware snd_at91_ac97_capture_hw = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_BLOCK_TRANSFER),
+ .formats = (SNDRV_PCM_FMTBIT_S16_LE
+ | SNDRV_PCM_FMTBIT_S16_BE),
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .buffer_bytes_max = 256*1024,
+ .period_bytes_min = 1024,
+ .period_bytes_max = 4*1024,
+ .periods_min = 1,
+ .periods_max = 64,
+};
+
+static int snd_at91_ac97_playback_open(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = snd_at91_ac97_playback_hw;
+ chip->playback_substream = substream;
+ chip->period = 0;
+
+ pr_debug("%s : snd_at91_ac97_playback_open\n\r", driver_name);
+
+ return 0;
+}
+
+static int snd_at91_ac97_capture_open(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ runtime->hw = snd_at91_ac97_capture_hw;
+ chip->capture_substream = substream;
+ chip->period = 0;
+
+ pr_debug("%s : snd_at91_ac97_capture_open\n\r", driver_name);
+
+ return 0;
+}
+
+static int snd_at91_ac97_playback_close(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+
+ chip->playback_substream = NULL;
+
+ return 0;
+}
+
+static int snd_at91_ac97_capture_close(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+
+ chip->capture_substream = NULL;
+
+ return 0;
+}
+
+static int snd_at91_ac97_playback_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ int err;
+
+ err = snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+
+ return err;
+}
+
+static int snd_at91_ac97_capture_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ int err;
+
+ err = snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+
+ return err;
+}
+
+static int snd_at91_ac97_playback_hw_free(struct snd_pcm_substream *substream)
+{
+
+ snd_pcm_lib_free_pages(substream);
+
+ return 0;
+}
+
+static int snd_at91_ac97_capture_hw_free(struct snd_pcm_substream *substream)
+{
+
+ snd_pcm_lib_free_pages(substream);
+
+ return 0;
+}
+
+static int snd_at91_ac97_playback_prepare(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = 0;
+
+ pr_debug("%s : block_size = %d\n\r", driver_name, block_size);
+
+ /* Assign slots to channels */
+ switch (substream->runtime->channels) {
+ /* TODO: Support more than two channels */
+ case 1:
+ word |= AT91C_AC97C_CHID3_CA;
+ break;
+ case 2:
+ default:
+ /* Assign Left and Right slots (3,4) to Channel A */
+ word |= AT91C_AC97C_CHID3_CA | AT91C_AC97C_CHID4_CA;
+ break;
+ }
+
+ ac97c_writel(chip, OCA, word);
+
+ /*
+ * Configure sample format and size..
+ */
+ word = AT91C_AC97C_PDCEN | AT91C_AC97C_SIZE_16_BITS;
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_BE:
+ word |= AT91C_AC97C_CEM;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ default:
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, word);
+
+ /* Set variable rate if needed */
+ if (runtime->rate != 48000) {
+ word = ac97c_readl(chip, MR);
+ word |= AT91C_AC97C_VRA;
+ ac97c_writel(chip, MR, word);
+ } else {
+ /* Clear Variable Rate Bit */
+ word = ac97c_readl(chip, MR);
+ word &= ~AT91C_AC97C_VRA;
+ ac97c_writel(chip, MR, word);
+ }
+
+ /* Set rate */
+ snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
+
+ pr_debug("%s : dma_addr = %x\n\r : dma_area = %x\n\r"
+ " : dma_bytes = %d\n\r",
+ driver_name, runtime->dma_addr,
+ runtime->dma_area, runtime->dma_bytes);
+
+ /* Initialize and start the PDC */
+ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);
+ writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_TNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
+
+ /* Enable Channel A interrupts */
+ ac97c_writel(chip, IER, AT91C_AC97C_CAEVT);
+
+ pr_debug("%s : snd_at91_ac97_playback_prepare\n\r", driver_name);
+
+ return 0;
+}
+
+static int snd_at91_ac97_capture_prepare(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = 0;
+
+ pr_debug("%s : block_size = %d\n\r", driver_name, block_size);
+
+
+ /* Assign slots to channels */
+ switch (substream->runtime->channels) {
+ /* TODO: Support more than two channels */
+ case 1:
+ word |= AT91C_AC97C_CHID3_CA;
+ break;
+ case 2:
+ default:
+ /* Assign Left and Right slots (3,4) to Channel A */
+ word |= AT91C_AC97C_CHID3_CA | AT91C_AC97C_CHID4_CA;
+ break;
+ }
+
+ ac97c_writel(chip, ICA, word);
+
+ /*
+ * Configure sample format and size.
+ */
+ word = AT91C_AC97C_PDCEN | AT91C_AC97C_SIZE_16_BITS;
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_BE:
+ word |= AT91C_AC97C_CEM;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, word);
+
+ /* Set variable rate if needed */
+ if (runtime->rate != 48000) {
+ word = ac97c_readl(chip, MR);
+ word |= AT91C_AC97C_VRA;
+ ac97c_writel(chip, MR, word);
+ } else {
+ /* Clear Variable Rate Bit */
+ word = ac97c_readl(chip, MR);
+ word &= ~AT91C_AC97C_VRA;
+ ac97c_writel(chip, MR, word);
+ }
+
+ /* Set rate */
+ snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
+
+ pr_debug("%s : dma_addr = %x\n\r : dma_area = %x\n\r"
+ " : dma_bytes = %d\n\r",
+ driver_name, runtime->dma_addr,
+ runtime->dma_area, runtime->dma_bytes);
+
+ /* Initialize and start the PDC */
+ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_RCR);
+ writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
+
+ /* Enable Channel A interrupts */
+ ac97c_writel(chip, IER, AT91C_AC97C_CAEVT);
+
+ pr_debug("%s : snd_at91_ac97_capture_prepare\n\r", driver_name);
+
+ return 0;
+}
+
+static int snd_at91_ac97_playback_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ unsigned long camr, ptcr = 0, flags;
+ int err = 0;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ camr = ac97c_readl(chip, CAMR);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ camr |= (AT91C_AC97C_CEN | AT91C_AC97C_ENDTX);
+ ptcr = ATMEL_PDC_TXTEN;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ camr &= ~(AT91C_AC97C_CEN | AT91C_AC97C_ENDTX);
+ ptcr = ATMEL_PDC_TXTDIS;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, camr);
+
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
+
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ pr_debug("%s : snd_at91_ac97_playback_trigger\n\r", driver_name);
+
+ return err;
+}
+
+static int snd_at91_ac97_capture_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ unsigned long camr, ptcr = 0, flags;
+ int err = 0;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ camr = ac97c_readl(chip, CAMR);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ camr |= (AT91C_AC97C_CEN |
+ AT91C_AC97C_ENDRX |
+ AT91C_AC97C_OVRUN);
+ ptcr = ATMEL_PDC_RXTEN;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ camr &= ~(AT91C_AC97C_CEN |
+ AT91C_AC97C_ENDRX |
+ AT91C_AC97C_OVRUN);
+ ptcr = ATMEL_PDC_RXTDIS;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, camr);
+
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
+
+ spin_unlock_irqrestore(&chip->lock, flags);
+
+ pr_debug("%s : snd_at91_ac97_capture_trigger\n\r", driver_name);
+
+ return err;
+}
+
+static snd_pcm_uframes_t
+snd_at91_ac97_playback_pointer(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t pos;
+ unsigned long bytes;
+
+ bytes = readl(chip->regs + ATMEL_PDC_TPR) - runtime->dma_addr;
+
+ pos = bytes_to_frames(runtime, bytes);
+
+ if (pos >= runtime->buffer_size)
+ pos -= runtime->buffer_size;
+
+ pr_debug("%s : snd_at91_ac97_playback_pointer\n\r", driver_name);
+
+ return pos;
+}
+
+static snd_pcm_uframes_t
+snd_at91_ac97_capture_pointer(struct snd_pcm_substream *substream)
+{
+ at91_ac97_t *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t pos;
+ unsigned long bytes;
+
+ bytes = readl(chip->regs + ATMEL_PDC_RPR) - runtime->dma_addr;
+ pos = bytes_to_frames(runtime, bytes);
+ if (pos >= runtime->buffer_size)
+ pos -= runtime->buffer_size;
+
+ pr_debug("%s : snd_at91_ac97_capture_pointer\n\r", driver_name);
+
+ return pos;
+}
+
+static struct snd_pcm_ops at91_ac97_playback_ops = {
+ .open = snd_at91_ac97_playback_open,
+ .close = snd_at91_ac97_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_at91_ac97_playback_hw_params,
+ .hw_free = snd_at91_ac97_playback_hw_free,
+ .prepare = snd_at91_ac97_playback_prepare,
+ .trigger = snd_at91_ac97_playback_trigger,
+ .pointer = snd_at91_ac97_playback_pointer,
+};
+
+static struct snd_pcm_ops at91_ac97_capture_ops = {
+ .open = snd_at91_ac97_capture_open,
+ .close = snd_at91_ac97_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_at91_ac97_capture_hw_params,
+ .hw_free = snd_at91_ac97_capture_hw_free,
+ .prepare = snd_at91_ac97_capture_prepare,
+ .trigger = snd_at91_ac97_capture_trigger,
+ .pointer = snd_at91_ac97_capture_pointer,
+};
+
+static struct ac97_pcm at91_ac97_pcm_defs[] __devinitdata = {
+ /* Playback */
+ {
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } },
+ },
+ /* PCM in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } }
+ },
+ /* Mic in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = (1<<AC97_SLOT_MIC),
+ } }
+ },
+};
+
+static int __devinit snd_at91_ac97_pcm_new(at91_ac97_t *chip)
+{
+ struct snd_pcm *pcm;
+ int err;
+
+ err = snd_ac97_pcm_assign(chip->ac97_bus,
+ ARRAY_SIZE(at91_ac97_pcm_defs),
+ at91_ac97_pcm_defs);
+ if (err)
+ return err;
+
+ err = snd_pcm_new(chip->card, "Atmel AC97", 0, 1, 1, &pcm);
+ if (err)
+ return err;
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ &chip->pdev->dev,
+ 128 * 1024, 256 * 1024);
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &at91_ac97_playback_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &at91_ac97_capture_ops);
+
+ pcm->private_data = chip;
+ pcm->info_flags = 0;
+ strcpy(pcm->name, "Atmel AC97");
+ chip->pcm = pcm;
+
+ return 0;
+}
+
+
+/*
+ * Mixer part
+ */
+static int snd_at91_ac97_mixer_new(at91_ac97_t *chip)
+{
+ int err;
+ struct snd_ac97_template template;
+
+ memset(&template, 0, sizeof(template));
+ template.private_data = chip;
+ template.num = 0;
+ template.addr = 0;
+ err = snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97);
+
+ return err;
+}
+
+static irqreturn_t snd_at91_ac97_interrupt(int irq, void *dev_id)
+{
+ at91_ac97_t *chip = dev_id;
+ unsigned long status;
+ unsigned long dummy;
+
+ status = ac97c_readl(chip, SR);
+
+ if (status & AT91C_AC97C_CAEVT) {
+ struct snd_pcm_runtime *runtime;
+ int offset, next_period, block_size;
+ unsigned long casr, camr, test;
+
+ casr = ac97c_readl(chip, CASR);
+ camr = ac97c_readl(chip, CAMR);
+ test = casr & camr;
+
+ if ((casr & camr) & AT91C_AC97C_ENDTX) {
+ runtime = chip->playback_substream->runtime;
+ block_size = frames_to_bytes(runtime,
+ runtime->period_size);
+ chip->period++;
+
+ if (chip->period == runtime->periods)
+ chip->period = 0;
+ next_period = chip->period + 1;
+ if (next_period == runtime->periods)
+ next_period = 0;
+
+ offset = block_size * next_period;
+
+ writel(runtime->dma_addr + offset,
+ chip->regs + ATMEL_PDC_TNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
+
+ snd_pcm_period_elapsed(chip->playback_substream);
+ }
+ if ((casr & camr) & AT91C_AC97C_ENDRX) {
+ runtime = chip->capture_substream->runtime;
+ block_size = frames_to_bytes(runtime,
+ runtime->period_size);
+ chip->period++;
+
+ if (chip->period == runtime->periods)
+ chip->period = 0;
+ next_period = chip->period + 1;
+ if (next_period == runtime->periods)
+ next_period = 0;
+
+ offset = block_size * next_period;
+
+ writel(runtime->dma_addr + offset,
+ chip->regs + ATMEL_PDC_RNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
+ snd_pcm_period_elapsed(chip->capture_substream);
+ }
+ if ((casr & camr) & AT91C_AC97C_OVRUN)
+ printk(KERN_INFO " AC97_irq - overrun!\n");
+ } else {
+ printk(KERN_WARNING
+ "Spurious AC97 interrupt, status = 0x%08lx\n",
+ status);
+ }
+
+ dummy = ac97c_readl(chip, SR);
+
+ return IRQ_HANDLED;
+}
+
+
+/*
+ * CODEC part
+ */
+static void snd_at91_ac97_hard_reset(at91_ac97_t *chip)
+{
+ /* Enable AC97 Controller.*/
+ /* Perform a cold (hard) reset of the AC97 codec.*/
+ ac97c_writel(chip, MR, 0);
+ ac97c_writel(chip, MR, AT91C_AC97C_ENA);
+
+ at91_ac97c_drive_reset(chip, 0);
+ udelay(1);
+ at91_ac97c_drive_reset(chip, 1);
+ udelay(1);
+}
+
+static void snd_at91_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ at91_ac97_t *chip = ac97->private_data;
+ unsigned long word;
+ int timeout = 0x100;
+
+ pr_debug("%s : Writing codec register 0x%x = 0x%x\n\r",
+ driver_name, reg, val);
+
+ word = (reg & 0x7f) << 16 | val;
+
+ do {
+ if (ac97c_readl(chip, COSR) & AT91C_AC97C_TXRDY) {
+ ac97c_writel(chip, COTHR, word);
+ return;
+ }
+ udelay(1);
+ } while (--timeout);
+
+ snd_printk(KERN_WARNING "at91-ac97: codec write timeout\n\r");
+}
+
+static unsigned short snd_at91_ac97_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ at91_ac97_t *chip = ac97->private_data;
+ unsigned long word;
+ int timeout = 40;
+
+ word = (0x80 | (reg & 0x7f)) << 16;
+
+ do {
+ if (ac97c_readl(chip, COSR) & AT91C_AC97C_TXRDY) {
+ ac97c_writel(chip, COTHR, word);
+ break;
+ }
+ udelay(1);
+ } while (--timeout);
+
+ if (!timeout)
+ goto timed_out;
+
+ timeout = 0x100;
+
+ do {
+ if (ac97c_readl(chip, COSR) & AT91C_AC97C_RXRDY) {
+ unsigned short val =
+ (unsigned short) ac97c_readl(chip, CORHR);
+ return val;
+ }
+ udelay(1);
+ } while (--timeout);
+
+ if (!timeout)
+ goto timed_out;
+
+timed_out:
+ snd_printk(KERN_WARNING "at91-ac97: codec write timeout\n\r");
+ return 0xffff;
+}
+
+static void snd_at91_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+ at91_ac97_t *chip = ac97->private_data;
+ unsigned int mr = ac97c_readl(chip, MR);
+
+ mr |= AT91C_AC97C_WRST;
+
+ ac97c_writel(chip, MR, mr);
+ udelay(1);
+
+ mr &= ~AT91C_AC97C_WRST;
+ ac97c_writel(chip, MR, mr);
+}
+
+static void snd_at91_ac97_destroy(struct snd_card *card)
+{
+ at91_ac97_t *chip = get_chip(card);
+
+ if (chip->irq != -1)
+ free_irq(chip->irq, chip);
+
+ if (chip->regs)
+ iounmap(chip->regs);
+}
+
+static int __devinit snd_at91_ac97_create(struct snd_card *card,
+ struct platform_device *pdev)
+{
+ static struct snd_ac97_bus_ops ops = {
+ .write = snd_at91_ac97_write,
+ .read = snd_at91_ac97_read,
+ .reset = snd_at91_ac97_warm_reset,
+ };
+
+ at91_ac97_t *chip = get_chip(card);
+ int irq, err = 0;
+
+
+
+ card->private_free = snd_at91_ac97_destroy;
+
+ spin_lock_init(&chip->lock);
+ chip->card = card;
+ chip->pdev = pdev;
+ chip->irq = -1;
+
+ if (!(platform_resource_flags(pdev, 0) & IORESOURCE_MEM)
+ || !(platform_resource_flags(pdev, 1) & IORESOURCE_IRQ))
+ return -ENODEV;
+
+ irq = platform_resource_start(pdev, 1);
+
+ err = request_irq(irq, snd_at91_ac97_interrupt, 0, "ac97", chip);
+ if (err) {
+ snd_printk(KERN_WARNING "unable to request IRQ%d\n", irq);
+ return err;
+ }
+
+ chip->irq = irq;
+ snd_printk(KERN_INFO "AC97C regs = %08X \n",
+ platform_resource_start(pdev, 0));
+ snd_printk(KERN_INFO "AC97C irq = %d \n", irq);
+
+ chip->regs = ioremap(platform_resource_start(pdev, 0),
+ platform_resource_len(pdev, 0));
+ if (!chip->regs) {
+ snd_printk(KERN_WARNING "unable to remap AC97C io memory\n");
+ return -ENOMEM;
+ }
+
+ snd_card_set_dev(card, &pdev->dev);
+
+ err = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
+
+ return err;
+}
+
+static int __devinit snd_at91_ac97_probe(struct platform_device *pdev)
+{
+ static int dev;
+ struct atmel_ac97_data *pdata = pdev->dev.platform_data;
+ struct snd_card *card;
+ at91_ac97_t *chip;
+ int err;
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[dev]) {
+ dev++;
+ return -ENOENT;
+ }
+
+ card = snd_card_new(index[dev], id[dev], THIS_MODULE,
+ sizeof(at91_ac97_t));
+ if (!card)
+ return -ENOMEM;
+ chip = get_chip(card);
+
+ err = snd_at91_ac97_create(card, pdev);
+ if (err)
+ goto out_free_card;
+
+ /* Enable AC97 Controller clock*/
+ chip->reset_pin = pdata->reset_pin;
+ chip->ac97_clk = clk_get(NULL, "ac97_clk");
+ if (!chip->ac97_clk)
+ goto out_free_card;
+
+ clk_enable(chip->ac97_clk);
+
+ /* Perform a codec hard reset.*/
+ /* This also enables the AC97 Controller.*/
+ snd_at91_ac97_hard_reset(chip);
+
+ err = snd_at91_ac97_mixer_new(chip);
+ if (err)
+ goto out_free_card;
+
+ err = snd_at91_ac97_pcm_new(chip);
+ if (err)
+ goto out_free_card;
+
+ strcpy(card->driver, "ac97c");
+ strcpy(card->shortname, "Atmel AC97");
+ sprintf(card->longname, "Atmel AC97 Controller at %#lx, irq %i",
+ (unsigned long) platform_resource_start(pdev, 0),
+ (int) chip->irq);
+
+ err = snd_card_register(card);
+ if (err)
+ goto out_free_card;
+
+ dev_set_drvdata(&pdev->dev, card);
+ dev++;
+ return 0;
+
+out_free_card:
+ snd_card_free(card);
+ return err;
+}
+
+static int __devexit snd_at91_ac97_remove(struct platform_device *pdev)
+{
+ struct snd_card *card = dev_get_drvdata(&pdev->dev);
+ at91_ac97_t *chip = get_chip(card);
+
+
+ snd_card_free(card);
+
+ /* Disable AC97 Controller*/
+ ac97c_writel(chip, MR, 0);
+
+ /* Disable AC97 Controller clock*/
+ clk_disable(chip->ac97_clk);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver at91_ac97_driver = {
+ .probe = snd_at91_ac97_probe,
+ .remove = __devexit_p(snd_at91_ac97_remove),
+ .driver =
+ {
+ .name = "ac97c",
+ }
+ ,
+};
+
+static int __init at91_ac97_init(void)
+{
+ return platform_driver_register(&at91_ac97_driver);
+}
+
+static void __exit at91_ac97_exit(void)
+{
+ platform_driver_unregister(&at91_ac97_driver);
+}
+
+module_init(at91_ac97_init);
+module_exit(at91_ac97_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Driver for Atmel AC97 Controller");
+MODULE_AUTHOR("Atmel");
+
diff --git a/sound/arm/at91-ac97.h b/sound/arm/at91-ac97.h
new file mode 100644
index 0000000..e945f5d
--- /dev/null
+++ b/sound/arm/at91-ac97.h
@@ -0,0 +1,295 @@
+/*
+ * at91-ac97.h -- Hardware definition for the ac97c peripheral
+ * in the ATMEL at91sam926x processor
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2006 Atmel
+ *
+ * Author: Patrice Vilchez <patrice.vilchez at atmel.com>
+ * ATMEL CORP.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __AC97C_H
+#define __AC97C_H
+
+/* -------------------------------------------------------- */
+/* AC97C ID definitions for AT91SAM926x */
+/* -------------------------------------------------------- */
+#ifndef AT91C_ID_AC97C
+#define AT91C_ID_AC97C 18 /**< AC97 Controller id */
+#endif /* AT91C_ID_AC97C */
+
+/* -------------------------------------------------------- */
+/* AC97C Base Address definitions for AT91SAM926x */
+/* -------------------------------------------------------- */
+#define AT91C_BASE_AC97C 0xFFFA0000 /**< AC97C base address */
+
+/* -------------------------------------------------------- */
+/* PIO definition for AC97C hardware peripheral */
+/* -------------------------------------------------------- */
+#define AT91C_PB1_AC97CK (1 << 1) /**< */
+#define AT91C_PB0_AC97FS (1 << 0) /**< */
+#define AT91C_PB3_AC97RX (1 << 3) /**< */
+#define AT91C_PB2_AC97TX (1 << 2) /**< */
+
+/* -------------------------------------------------------- */
+/* Register offset definition for AC97C hardware peripheral */
+/* -------------------------------------------------------- */
+#define AC97C_MR (0x0008) /**< Mode Register */
+#define AC97C_ICA (0x0010) /**< Input Channel AssignementRegister */
+#define AC97C_OCA (0x0014) /**< Output Channel Assignement Register */
+#define AC97C_CARHR (0x0020) /**< Channel A Receive Holding Register */
+#define AC97C_CATHR (0x0024) /**< Channel A Transmit Holding Register */
+#define AC97C_CASR (0x0028) /**< Channel A Status Register */
+#define AC97C_CAMR (0x002C) /**< Channel A Mode Register */
+#define AC97C_CBRHR (0x0030) /**< Channel B Receive Holding Register (optional) */
+#define AC97C_CBTHR (0x0034) /**< Channel B Transmit Holding Register (optional) */
+#define AC97C_CBSR (0x0038) /**< Channel B Status Register */
+#define AC97C_CBMR (0x003C) /**< Channel B Mode Register */
+#define AC97C_CORHR (0x0040) /**< COdec Transmit Holding Register */
+#define AC97C_COTHR (0x0044) /**< COdec Transmit Holding Register */
+#define AC97C_COSR (0x0048) /**< CODEC Status Register */
+#define AC97C_COMR (0x004C) /**< CODEC Mask Status Register */
+#define AC97C_SR (0x0050) /**< Status Register */
+#define AC97C_IER (0x0054) /**< Interrupt Enable Register */
+#define AC97C_IDR (0x0058) /**< Interrupt Disable Register */
+#define AC97C_IMR (0x005C) /**< Interrupt Mask Register */
+#define AC97C_VERSION (0x00FC) /**< Version Register */
+
+/* -------------------------------------------------------- */
+/* Bitfields definition for AC97C hardware peripheral */
+/* -------------------------------------------------------- */
+/* --- Register AC97C_MR */
+#define AT91C_AC97C_ENA (0x1 << 0) /**< (AC97C) AC97 Controller Global Enable */
+#define AT91C_AC97C_WRST (0x1 << 1) /**< (AC97C) Warm Reset */
+#define AT91C_AC97C_VRA (0x1 << 2) /**< (AC97C) Variable RAte (for Data Slots) */
+/* --- Register AC97C_ICA */
+#define AT91C_AC97C_CHID3 (0x7 << 0) /**< (AC97C) Channel Id for the input slot 3 */
+#define AT91C_AC97C_CHID3_NONE 0x0 /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CA 0x1 /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CB 0x2 /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CC 0x3 /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4 (0x7 << 3) /**< (AC97C) Channel Id for the input slot 4 */
+#define AT91C_AC97C_CHID4_NONE (0x0 << 3) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CA (0x1 << 3) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CB (0x2 << 3) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CC (0x3 << 3) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5 (0x7 << 6) /**< (AC97C) Channel Id for the input slot 5 */
+#define AT91C_AC97C_CHID5_NONE (0x0 << 6) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CA (0x1 << 6) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CB (0x2 << 6) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CC (0x3 << 6) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6 (0x7 << 9) /**< (AC97C) Channel Id for the input slot 6 */
+#define AT91C_AC97C_CHID6_NONE (0x0 << 9) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CA (0x1 << 9) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CB (0x2 << 9) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CC (0x3 << 9) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7 (0x7 << 12) /**< (AC97C) Channel Id for the input slot 7 */
+#define AT91C_AC97C_CHID7_NONE (0x0 << 12) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CA (0x1 << 12) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CB (0x2 << 12) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CC (0x3 << 12) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8 (0x7 << 15) /**< (AC97C) Channel Id for the input slot 8 */
+#define AT91C_AC97C_CHID8_NONE (0x0 << 15) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CA (0x1 << 15) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CB (0x2 << 15) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CC (0x3 << 15) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9 (0x7 << 18) /**< (AC97C) Channel Id for the input slot 9 */
+#define AT91C_AC97C_CHID9_NONE (0x0 << 18) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CA (0x1 << 18) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CB (0x2 << 18) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CC (0x3 << 18) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10 (0x7 << 21) /**< (AC97C) Channel Id for the input slot 10 */
+#define AT91C_AC97C_CHID10_NONE (0x0 << 21) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CA (0x1 << 21) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CB (0x2 << 21) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CC (0x3 << 21) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11 (0x7 << 24) /**< (AC97C) Channel Id for the input slot 11 */
+#define AT91C_AC97C_CHID11_NONE (0x0 << 24) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CA (0x1 << 24) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CB (0x2 << 24) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CC (0x3 << 24) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12 (0x7 << 27) /**< (AC97C) Channel Id for the input slot 12 */
+#define AT91C_AC97C_CHID12_NONE (0x0 << 27) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CA (0x1 << 27) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CB (0x2 << 27) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CC (0x3 << 27) /**< (AC97C) Channel C data will be transmitted during this slot */
+/* --- Register AC97C_OCA */
+#define AT91C_AC97C_CHID3 (0x7 << 0) /**< (AC97C) Channel Id for the input slot 3 */
+#define AT91C_AC97C_CHID3_NONE 0x0 /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CA 0x1 /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CB 0x2 /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID3_CC 0x3 /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4 (0x7 << 3) /**< (AC97C) Channel Id for the input slot 4 */
+#define AT91C_AC97C_CHID4_NONE (0x0 << 3) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CA (0x1 << 3) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CB (0x2 << 3) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID4_CC (0x3 << 3) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5 (0x7 << 6) /**< (AC97C) Channel Id for the input slot 5 */
+#define AT91C_AC97C_CHID5_NONE (0x0 << 6) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CA (0x1 << 6) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CB (0x2 << 6) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID5_CC (0x3 << 6) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6 (0x7 << 9) /**< (AC97C) Channel Id for the input slot 6 */
+#define AT91C_AC97C_CHID6_NONE (0x0 << 9) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CA (0x1 << 9) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CB (0x2 << 9) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID6_CC (0x3 << 9) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7 (0x7 << 12) /**< (AC97C) Channel Id for the input slot 7 */
+#define AT91C_AC97C_CHID7_NONE (0x0 << 12) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CA (0x1 << 12) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CB (0x2 << 12) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID7_CC (0x3 << 12) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8 (0x7 << 15) /**< (AC97C) Channel Id for the input slot 8 */
+#define AT91C_AC97C_CHID8_NONE (0x0 << 15) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CA (0x1 << 15) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CB (0x2 << 15) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID8_CC (0x3 << 15) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9 (0x7 << 18) /**< (AC97C) Channel Id for the input slot 9 */
+#define AT91C_AC97C_CHID9_NONE (0x0 << 18) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CA (0x1 << 18) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CB (0x2 << 18) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID9_CC (0x3 << 18) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10 (0x7 << 21) /**< (AC97C) Channel Id for the input slot 10 */
+#define AT91C_AC97C_CHID10_NONE (0x0 << 21) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CA (0x1 << 21) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CB (0x2 << 21) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID10_CC (0x3 << 21) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11 (0x7 << 24) /**< (AC97C) Channel Id for the input slot 11 */
+#define AT91C_AC97C_CHID11_NONE (0x0 << 24) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CA (0x1 << 24) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CB (0x2 << 24) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID11_CC (0x3 << 24) /**< (AC97C) Channel C data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12 (0x7 << 27) /**< (AC97C) Channel Id for the input slot 12 */
+#define AT91C_AC97C_CHID12_NONE (0x0 << 27) /**< (AC97C) No data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CA (0x1 << 27) /**< (AC97C) Channel A data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CB (0x2 << 27) /**< (AC97C) Channel B data will be transmitted during this slot */
+#define AT91C_AC97C_CHID12_CC (0x3 << 27) /**< (AC97C) Channel C data will be transmitted during this slot */
+/* --- Register AC97C_CARHR */
+#define AT91C_AC97C_RDATA (0xFFFFF << 0) /**< (AC97C) Receive data */
+/* --- Register AC97C_CATHR */
+#define AT91C_AC97C_TDATA (0xFFFFF << 0) /**< (AC97C) Transmit data */
+/* --- Register AC97C_CASR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+#define AT91C_AC97C_OVRUN (0x1 << 5) /**< (AC97C) */
+#define AT91C_AC97C_ENDTX (0x1 << 10) /**< (AC97C) */
+#define AT91C_AC97C_TXBUFE (0x1 << 11) /**< (AC97C) */
+#define AT91C_AC97C_ENDRX (0x1 << 14) /**< (AC97C) */
+#define AT91C_AC97C_RXBUFF (0x1 << 15) /**< (AC97C) */
+/* --- Register AC97C_CAMR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+#define AT91C_AC97C_OVRUN (0x1 << 5) /**< (AC97C) */
+#define AT91C_AC97C_ENDTX (0x1 << 10) /**< (AC97C) */
+#define AT91C_AC97C_TXBUFE (0x1 << 11) /**< (AC97C) */
+#define AT91C_AC97C_ENDRX (0x1 << 14) /**< (AC97C) */
+#define AT91C_AC97C_RXBUFF (0x1 << 15) /**< (AC97C) */
+#define AT91C_AC97C_SIZE (0x3 << 16) /**< (AC97C) */
+#define AT91C_AC97C_SIZE_20_BITS (0x0 << 16) /**< (AC97C) Data size is 20 bits */
+#define AT91C_AC97C_SIZE_18_BITS (0x1 << 16) /**< (AC97C) Data size is 18 bits */
+#define AT91C_AC97C_SIZE_16_BITS (0x2 << 16) /**< (AC97C) Data size is 16 bits */
+#define AT91C_AC97C_SIZE_10_BITS (0x3 << 16) /**< (AC97C) Data size is 10 bits */
+#define AT91C_AC97C_CEM (0x1 << 18) /**< (AC97C) */
+#define AT91C_AC97C_CEN (0x1 << 21) /**< (AC97C) */
+#define AT91C_AC97C_PDCEN (0x1 << 22) /**< (AC97C) */
+/* --- Register AC97C_CBRHR */
+#define AT91C_AC97C_RDATA (0xFFFFF << 0) /**< (AC97C) Receive data */
+/* --- Register AC97C_CBTHR */
+#define AT91C_AC97C_TDATA (0xFFFFF << 0) /**< (AC97C) Transmit data */
+/* --- Register AC97C_CBSR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+#define AT91C_AC97C_OVRUN (0x1 << 5) /**< (AC97C) */
+/* --- Register AC97C_CBMR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+#define AT91C_AC97C_OVRUN (0x1 << 5) /**< (AC97C) */
+#define AT91C_AC97C_SIZE (0x3 << 16) /**< (AC97C) */
+#define AT91C_AC97C_SIZE_20_BITS (0x0 << 16) /**< (AC97C) Data size is 20 bits */
+#define AT91C_AC97C_SIZE_18_BITS (0x1 << 16) /**< (AC97C) Data size is 18 bits */
+#define AT91C_AC97C_SIZE_16_BITS (0x2 << 16) /**< (AC97C) Data size is 16 bits */
+#define AT91C_AC97C_SIZE_10_BITS (0x3 << 16) /**< (AC97C) Data size is 10 bits */
+#define AT91C_AC97C_CEM (0x1 << 18) /**< (AC97C) */
+#define AT91C_AC97C_CEN (0x1 << 21) /**< (AC97C) */
+/* --- Register AC97C_CORHR */
+#define AT91C_AC97C_SDATA (0xFFFF << 0) /**< (AC97C) Status Data */
+/* --- Register AC97C_COTHR */
+#define AT91C_AC97C_CDATA (0xFFFF << 0) /**< (AC97C) Command Data */
+#define AT91C_AC97C_CADDR (0x7F << 16) /**< (AC97C) COdec control register index */
+#define AT91C_AC97C_READ (0x1 << 23) /**< (AC97C) Read/Write command */
+/* --- Register AC97C_COSR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+/* --- Register AC97C_COMR */
+#define AT91C_AC97C_TXRDY (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_TXEMPTY (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_UNRUN (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_RXRDY (0x1 << 4) /**< (AC97C) */
+/* --- Register AC97C_SR */
+#define AT91C_AC97C_SOF (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_WKUP (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_COEVT (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_CAEVT (0x1 << 3) /**< (AC97C) */
+#define AT91C_AC97C_CBEVT (0x1 << 4) /**< (AC97C) */
+/* --- Register AC97C_IER */
+#define AT91C_AC97C_SOF (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_WKUP (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_COEVT (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_CAEVT (0x1 << 3) /**< (AC97C) */
+#define AT91C_AC97C_CBEVT (0x1 << 4) /**< (AC97C) */
+/* --- Register AC97C_IDR */
+#define AT91C_AC97C_SOF (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_WKUP (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_COEVT (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_CAEVT (0x1 << 3) /**< (AC97C) */
+#define AT91C_AC97C_CBEVT (0x1 << 4) /**< (AC97C) */
+/* --- Register AC97C_IMR */
+#define AT91C_AC97C_SOF (0x1 << 0) /**< (AC97C) */
+#define AT91C_AC97C_WKUP (0x1 << 1) /**< (AC97C) */
+#define AT91C_AC97C_COEVT (0x1 << 2) /**< (AC97C) */
+#define AT91C_AC97C_CAEVT (0x1 << 3) /**< (AC97C) */
+#define AT91C_AC97C_CBEVT (0x1 << 4) /**< (AC97C) */
+
+#define platform_num_resources(dev) ((dev)->num_resources)
+#define platform_resource_start(dev, i) ((dev)->resource[(i)].start)
+#define platform_resource_end(dev, i) ((dev)->resource[(i)].end)
+#define platform_resource_flags(dev, i) ((dev)->resource[(i)].flags)
+#define platform_resource_len(dev, i) \
+ (platform_resource_end((dev), (i)) - \
+ platform_resource_start((dev), (i)) + 1)
+
+#define get_chip(card) ((at91_ac97_t *)(card)->private_data)
+
+#define ac97c_writel(chip, reg, val) \
+ writel((val), (chip)->regs + AC97C_##reg)
+
+#define ac97c_readl(chip, reg) \
+ readl((chip)->regs + AC97C_##reg)
+
+#endif /* __AC97C_H */
--
1.5.3.7
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