diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/atmel/ac97c.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/atmel/ac97c.c | 1231 |
1 files changed, 0 insertions, 1231 deletions
diff --git a/ANDROID_3.4.5/sound/atmel/ac97c.c b/ANDROID_3.4.5/sound/atmel/ac97c.c deleted file mode 100644 index 115313ef..00000000 --- a/ANDROID_3.4.5/sound/atmel/ac97c.c +++ /dev/null @@ -1,1231 +0,0 @@ -/* - * Driver for Atmel AC97C - * - * Copyright (C) 2005-2009 Atmel Corporation - * - * 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. - */ -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/bitmap.h> -#include <linux/device.h> -#include <linux/dmaengine.h> -#include <linux/dma-mapping.h> -#include <linux/atmel_pdc.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <linux/gpio.h> -#include <linux/types.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/atmel-ac97c.h> -#include <sound/memalloc.h> - -#include <linux/dw_dmac.h> - -#include <mach/cpu.h> -#include <mach/gpio.h> - -#ifdef CONFIG_ARCH_AT91 -#include <mach/hardware.h> -#endif - -#include "ac97c.h" - -enum { - DMA_TX_READY = 0, - DMA_RX_READY, - DMA_TX_CHAN_PRESENT, - DMA_RX_CHAN_PRESENT, -}; - -/* Serialize access to opened variable */ -static DEFINE_MUTEX(opened_mutex); - -struct atmel_ac97c_dma { - struct dma_chan *rx_chan; - struct dma_chan *tx_chan; -}; - -struct atmel_ac97c { - struct clk *pclk; - struct platform_device *pdev; - struct atmel_ac97c_dma dma; - - 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; - - u64 cur_format; - unsigned int cur_rate; - unsigned long flags; - int playback_period, capture_period; - /* Serialize access to opened variable */ - spinlock_t lock; - void __iomem *regs; - int irq; - int opened; - int reset_pin; -}; - -#define get_chip(card) ((struct atmel_ac97c *)(card)->private_data) - -#define ac97c_writel(chip, reg, val) \ - __raw_writel((val), (chip)->regs + AC97C_##reg) -#define ac97c_readl(chip, reg) \ - __raw_readl((chip)->regs + AC97C_##reg) - -/* This function is called by the DMA driver. */ -static void atmel_ac97c_dma_playback_period_done(void *arg) -{ - struct atmel_ac97c *chip = arg; - snd_pcm_period_elapsed(chip->playback_substream); -} - -static void atmel_ac97c_dma_capture_period_done(void *arg) -{ - struct atmel_ac97c *chip = arg; - snd_pcm_period_elapsed(chip->capture_substream); -} - -static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip, - struct snd_pcm_substream *substream, - enum dma_transfer_direction direction) -{ - struct dma_chan *chan; - struct dw_cyclic_desc *cdesc; - struct snd_pcm_runtime *runtime = substream->runtime; - unsigned long buffer_len, period_len; - - /* - * We don't do DMA on "complex" transfers, i.e. with - * non-halfword-aligned buffers or lengths. - */ - if (runtime->dma_addr & 1 || runtime->buffer_size & 1) { - dev_dbg(&chip->pdev->dev, "too complex transfer\n"); - return -EINVAL; - } - - if (direction == DMA_MEM_TO_DEV) - chan = chip->dma.tx_chan; - else - chan = chip->dma.rx_chan; - - buffer_len = frames_to_bytes(runtime, runtime->buffer_size); - period_len = frames_to_bytes(runtime, runtime->period_size); - - cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len, - period_len, direction); - if (IS_ERR(cdesc)) { - dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n"); - return PTR_ERR(cdesc); - } - - if (direction == DMA_MEM_TO_DEV) { - cdesc->period_callback = atmel_ac97c_dma_playback_period_done; - set_bit(DMA_TX_READY, &chip->flags); - } else { - cdesc->period_callback = atmel_ac97c_dma_capture_period_done; - set_bit(DMA_RX_READY, &chip->flags); - } - - cdesc->period_callback_param = chip; - - return 0; -} - -static struct snd_pcm_hardware atmel_ac97c_hw = { - .info = (SNDRV_PCM_INFO_MMAP - | SNDRV_PCM_INFO_MMAP_VALID - | SNDRV_PCM_INFO_INTERLEAVED - | SNDRV_PCM_INFO_BLOCK_TRANSFER - | SNDRV_PCM_INFO_JOINT_DUPLEX - | SNDRV_PCM_INFO_RESUME - | SNDRV_PCM_INFO_PAUSE), - .formats = (SNDRV_PCM_FMTBIT_S16_BE - | SNDRV_PCM_FMTBIT_S16_LE), - .rates = (SNDRV_PCM_RATE_CONTINUOUS), - .rate_min = 4000, - .rate_max = 48000, - .channels_min = 1, - .channels_max = 2, - .buffer_bytes_max = 2 * 2 * 64 * 2048, - .period_bytes_min = 4096, - .period_bytes_max = 4096, - .periods_min = 6, - .periods_max = 64, -}; - -static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - - mutex_lock(&opened_mutex); - chip->opened++; - runtime->hw = atmel_ac97c_hw; - if (chip->cur_rate) { - runtime->hw.rate_min = chip->cur_rate; - runtime->hw.rate_max = chip->cur_rate; - } - if (chip->cur_format) - runtime->hw.formats = (1ULL << chip->cur_format); - mutex_unlock(&opened_mutex); - chip->playback_substream = substream; - return 0; -} - -static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - - mutex_lock(&opened_mutex); - chip->opened++; - runtime->hw = atmel_ac97c_hw; - if (chip->cur_rate) { - runtime->hw.rate_min = chip->cur_rate; - runtime->hw.rate_max = chip->cur_rate; - } - if (chip->cur_format) - runtime->hw.formats = (1ULL << chip->cur_format); - mutex_unlock(&opened_mutex); - chip->capture_substream = substream; - return 0; -} - -static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - - mutex_lock(&opened_mutex); - chip->opened--; - if (!chip->opened) { - chip->cur_rate = 0; - chip->cur_format = 0; - } - mutex_unlock(&opened_mutex); - - chip->playback_substream = NULL; - - return 0; -} - -static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - - mutex_lock(&opened_mutex); - chip->opened--; - if (!chip->opened) { - chip->cur_rate = 0; - chip->cur_format = 0; - } - mutex_unlock(&opened_mutex); - - chip->capture_substream = NULL; - - return 0; -} - -static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - int retval; - - retval = snd_pcm_lib_malloc_pages(substream, - params_buffer_bytes(hw_params)); - if (retval < 0) - return retval; - /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ - if (cpu_is_at32ap7000()) { - /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ - if (retval == 1) - if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) - dw_dma_cyclic_free(chip->dma.tx_chan); - } - /* Set restrictions to params. */ - mutex_lock(&opened_mutex); - chip->cur_rate = params_rate(hw_params); - chip->cur_format = params_format(hw_params); - mutex_unlock(&opened_mutex); - - return retval; -} - -static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - int retval; - - retval = snd_pcm_lib_malloc_pages(substream, - params_buffer_bytes(hw_params)); - if (retval < 0) - return retval; - /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ - if (cpu_is_at32ap7000()) { - if (retval < 0) - return retval; - /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */ - if (retval == 1) - if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) - dw_dma_cyclic_free(chip->dma.rx_chan); - } - - /* Set restrictions to params. */ - mutex_lock(&opened_mutex); - chip->cur_rate = params_rate(hw_params); - chip->cur_format = params_format(hw_params); - mutex_unlock(&opened_mutex); - - return retval; -} - -static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - if (cpu_is_at32ap7000()) { - if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) - dw_dma_cyclic_free(chip->dma.tx_chan); - } - return snd_pcm_lib_free_pages(substream); -} - -static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - if (cpu_is_at32ap7000()) { - if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) - dw_dma_cyclic_free(chip->dma.rx_chan); - } - return snd_pcm_lib_free_pages(substream); -} - -static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *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 = ac97c_readl(chip, OCA); - int retval; - - chip->playback_period = 0; - word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); - - /* assign channels to AC97C channel A */ - switch (runtime->channels) { - case 1: - word |= AC97C_CH_ASSIGN(PCM_LEFT, A); - break; - case 2: - word |= AC97C_CH_ASSIGN(PCM_LEFT, A) - | AC97C_CH_ASSIGN(PCM_RIGHT, A); - break; - default: - /* TODO: support more than two channels */ - return -EINVAL; - } - ac97c_writel(chip, OCA, word); - - /* configure sample format and size */ - word = ac97c_readl(chip, CAMR); - if (chip->opened <= 1) - word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; - else - word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; - - switch (runtime->format) { - case SNDRV_PCM_FORMAT_S16_LE: - if (cpu_is_at32ap7000()) - word |= AC97C_CMR_CEM_LITTLE; - break; - case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ - word &= ~(AC97C_CMR_CEM_LITTLE); - break; - default: - word = ac97c_readl(chip, OCA); - word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); - ac97c_writel(chip, OCA, word); - return -EINVAL; - } - - /* Enable underrun interrupt on channel A */ - word |= AC97C_CSR_UNRUN; - - ac97c_writel(chip, CAMR, word); - - /* Enable channel A event interrupt */ - word = ac97c_readl(chip, IMR); - word |= AC97C_SR_CAEVT; - ac97c_writel(chip, IER, word); - - /* set variable rate if needed */ - if (runtime->rate != 48000) { - word = ac97c_readl(chip, MR); - word |= AC97C_MR_VRA; - ac97c_writel(chip, MR, word); - } else { - word = ac97c_readl(chip, MR); - word &= ~(AC97C_MR_VRA); - ac97c_writel(chip, MR, word); - } - - retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, - runtime->rate); - if (retval) - dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", - runtime->rate); - - if (cpu_is_at32ap7000()) { - if (!test_bit(DMA_TX_READY, &chip->flags)) - retval = atmel_ac97c_prepare_dma(chip, substream, - DMA_MEM_TO_DEV); - } else { - /* 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); - } - - return retval; -} - -static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *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 = ac97c_readl(chip, ICA); - int retval; - - chip->capture_period = 0; - word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); - - /* assign channels to AC97C channel A */ - switch (runtime->channels) { - case 1: - word |= AC97C_CH_ASSIGN(PCM_LEFT, A); - break; - case 2: - word |= AC97C_CH_ASSIGN(PCM_LEFT, A) - | AC97C_CH_ASSIGN(PCM_RIGHT, A); - break; - default: - /* TODO: support more than two channels */ - return -EINVAL; - } - ac97c_writel(chip, ICA, word); - - /* configure sample format and size */ - word = ac97c_readl(chip, CAMR); - if (chip->opened <= 1) - word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; - else - word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; - - switch (runtime->format) { - case SNDRV_PCM_FORMAT_S16_LE: - if (cpu_is_at32ap7000()) - word |= AC97C_CMR_CEM_LITTLE; - break; - case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ - word &= ~(AC97C_CMR_CEM_LITTLE); - break; - default: - word = ac97c_readl(chip, ICA); - word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); - ac97c_writel(chip, ICA, word); - return -EINVAL; - } - - /* Enable overrun interrupt on channel A */ - word |= AC97C_CSR_OVRUN; - - ac97c_writel(chip, CAMR, word); - - /* Enable channel A event interrupt */ - word = ac97c_readl(chip, IMR); - word |= AC97C_SR_CAEVT; - ac97c_writel(chip, IER, word); - - /* set variable rate if needed */ - if (runtime->rate != 48000) { - word = ac97c_readl(chip, MR); - word |= AC97C_MR_VRA; - ac97c_writel(chip, MR, word); - } else { - word = ac97c_readl(chip, MR); - word &= ~(AC97C_MR_VRA); - ac97c_writel(chip, MR, word); - } - - retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, - runtime->rate); - if (retval) - dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", - runtime->rate); - - if (cpu_is_at32ap7000()) { - if (!test_bit(DMA_RX_READY, &chip->flags)) - retval = atmel_ac97c_prepare_dma(chip, substream, - DMA_DEV_TO_MEM); - } else { - /* 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); - } - - return retval; -} - -static int -atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - unsigned long camr, ptcr = 0; - int retval = 0; - - camr = ac97c_readl(chip, CAMR); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ - case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ - case SNDRV_PCM_TRIGGER_START: - if (cpu_is_at32ap7000()) { - retval = dw_dma_cyclic_start(chip->dma.tx_chan); - if (retval) - goto out; - } else { - ptcr = ATMEL_PDC_TXTEN; - } - camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; - break; - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ - case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ - case SNDRV_PCM_TRIGGER_STOP: - if (cpu_is_at32ap7000()) - dw_dma_cyclic_stop(chip->dma.tx_chan); - else - ptcr |= ATMEL_PDC_TXTDIS; - if (chip->opened <= 1) - camr &= ~AC97C_CMR_CENA; - break; - default: - retval = -EINVAL; - goto out; - } - - ac97c_writel(chip, CAMR, camr); - if (!cpu_is_at32ap7000()) - writel(ptcr, chip->regs + ATMEL_PDC_PTCR); -out: - return retval; -} - -static int -atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - unsigned long camr, ptcr = 0; - int retval = 0; - - camr = ac97c_readl(chip, CAMR); - ptcr = readl(chip->regs + ATMEL_PDC_PTSR); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ - case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ - case SNDRV_PCM_TRIGGER_START: - if (cpu_is_at32ap7000()) { - retval = dw_dma_cyclic_start(chip->dma.rx_chan); - if (retval) - goto out; - } else { - ptcr = ATMEL_PDC_RXTEN; - } - camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; - break; - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ - case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ - case SNDRV_PCM_TRIGGER_STOP: - if (cpu_is_at32ap7000()) - dw_dma_cyclic_stop(chip->dma.rx_chan); - else - ptcr |= (ATMEL_PDC_RXTDIS); - if (chip->opened <= 1) - camr &= ~AC97C_CMR_CENA; - break; - default: - retval = -EINVAL; - break; - } - - ac97c_writel(chip, CAMR, camr); - if (!cpu_is_at32ap7000()) - writel(ptcr, chip->regs + ATMEL_PDC_PTCR); -out: - return retval; -} - -static snd_pcm_uframes_t -atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - snd_pcm_uframes_t frames; - unsigned long bytes; - - if (cpu_is_at32ap7000()) - bytes = dw_dma_get_src_addr(chip->dma.tx_chan); - else - bytes = readl(chip->regs + ATMEL_PDC_TPR); - bytes -= runtime->dma_addr; - - frames = bytes_to_frames(runtime, bytes); - if (frames >= runtime->buffer_size) - frames -= runtime->buffer_size; - return frames; -} - -static snd_pcm_uframes_t -atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream) -{ - struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - snd_pcm_uframes_t frames; - unsigned long bytes; - - if (cpu_is_at32ap7000()) - bytes = dw_dma_get_dst_addr(chip->dma.rx_chan); - else - bytes = readl(chip->regs + ATMEL_PDC_RPR); - bytes -= runtime->dma_addr; - - frames = bytes_to_frames(runtime, bytes); - if (frames >= runtime->buffer_size) - frames -= runtime->buffer_size; - return frames; -} - -static struct snd_pcm_ops atmel_ac97_playback_ops = { - .open = atmel_ac97c_playback_open, - .close = atmel_ac97c_playback_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = atmel_ac97c_playback_hw_params, - .hw_free = atmel_ac97c_playback_hw_free, - .prepare = atmel_ac97c_playback_prepare, - .trigger = atmel_ac97c_playback_trigger, - .pointer = atmel_ac97c_playback_pointer, -}; - -static struct snd_pcm_ops atmel_ac97_capture_ops = { - .open = atmel_ac97c_capture_open, - .close = atmel_ac97c_capture_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = atmel_ac97c_capture_hw_params, - .hw_free = atmel_ac97c_capture_hw_free, - .prepare = atmel_ac97c_capture_prepare, - .trigger = atmel_ac97c_capture_trigger, - .pointer = atmel_ac97c_capture_pointer, -}; - -static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) -{ - struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; - irqreturn_t retval = IRQ_NONE; - u32 sr = ac97c_readl(chip, SR); - u32 casr = ac97c_readl(chip, CASR); - u32 cosr = ac97c_readl(chip, COSR); - u32 camr = ac97c_readl(chip, CAMR); - - if (sr & AC97C_SR_CAEVT) { - struct snd_pcm_runtime *runtime; - int offset, next_period, block_size; - dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", - casr & AC97C_CSR_OVRUN ? " OVRUN" : "", - casr & AC97C_CSR_RXRDY ? " RXRDY" : "", - casr & AC97C_CSR_UNRUN ? " UNRUN" : "", - casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", - casr & AC97C_CSR_TXRDY ? " TXRDY" : "", - !casr ? " NONE" : ""); - if (!cpu_is_at32ap7000()) { - if ((casr & camr) & AC97C_CSR_ENDTX) { - runtime = chip->playback_substream->runtime; - block_size = frames_to_bytes(runtime, - runtime->period_size); - chip->playback_period++; - - if (chip->playback_period == runtime->periods) - chip->playback_period = 0; - next_period = chip->playback_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) & AC97C_CSR_ENDRX) { - runtime = chip->capture_substream->runtime; - block_size = frames_to_bytes(runtime, - runtime->period_size); - chip->capture_period++; - - if (chip->capture_period == runtime->periods) - chip->capture_period = 0; - next_period = chip->capture_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); - } - } - retval = IRQ_HANDLED; - } - - if (sr & AC97C_SR_COEVT) { - dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", - cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", - cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", - cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", - cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", - !cosr ? " NONE" : ""); - retval = IRQ_HANDLED; - } - - if (retval == IRQ_NONE) { - dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " - "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); - } - - return retval; -} - -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 atmel_ac97c_pcm_new(struct atmel_ac97c *chip) -{ - struct snd_pcm *pcm; - struct snd_pcm_hardware hw = atmel_ac97c_hw; - int capture, playback, retval, err; - - capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags); - playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags); - - if (!cpu_is_at32ap7000()) { - err = snd_ac97_pcm_assign(chip->ac97_bus, - ARRAY_SIZE(at91_ac97_pcm_defs), - at91_ac97_pcm_defs); - if (err) - return err; - } - retval = snd_pcm_new(chip->card, chip->card->shortname, - chip->pdev->id, playback, capture, &pcm); - if (retval) - return retval; - - if (capture) - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, - &atmel_ac97_capture_ops); - if (playback) - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, - &atmel_ac97_playback_ops); - - retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - &chip->pdev->dev, hw.periods_min * hw.period_bytes_min, - hw.buffer_bytes_max); - if (retval) - return retval; - - pcm->private_data = chip; - pcm->info_flags = 0; - strcpy(pcm->name, chip->card->shortname); - chip->pcm = pcm; - - return 0; -} - -static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip) -{ - struct snd_ac97_template template; - memset(&template, 0, sizeof(template)); - template.private_data = chip; - return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97); -} - -static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg, - unsigned short val) -{ - struct atmel_ac97c *chip = get_chip(ac97); - unsigned long word; - int timeout = 40; - - word = (reg & 0x7f) << 16 | val; - - do { - if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) { - ac97c_writel(chip, COTHR, word); - return; - } - udelay(1); - } while (--timeout); - - dev_dbg(&chip->pdev->dev, "codec write timeout\n"); -} - -static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97, - unsigned short reg) -{ - struct atmel_ac97c *chip = get_chip(ac97); - unsigned long word; - int timeout = 40; - int write = 10; - - word = (0x80 | (reg & 0x7f)) << 16; - - if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) - ac97c_readl(chip, CORHR); - -retry_write: - timeout = 40; - - do { - if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) { - ac97c_writel(chip, COTHR, word); - goto read_reg; - } - udelay(10); - } while (--timeout); - - if (!--write) - goto timed_out; - goto retry_write; - -read_reg: - do { - if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) { - unsigned short val = ac97c_readl(chip, CORHR); - return val; - } - udelay(10); - } while (--timeout); - - if (!--write) - goto timed_out; - goto retry_write; - -timed_out: - dev_dbg(&chip->pdev->dev, "codec read timeout\n"); - return 0xffff; -} - -static bool filter(struct dma_chan *chan, void *slave) -{ - struct dw_dma_slave *dws = slave; - - if (dws->dma_dev == chan->device->dev) { - chan->private = dws; - return true; - } else - return false; -} - -static void atmel_ac97c_reset(struct atmel_ac97c *chip) -{ - ac97c_writel(chip, MR, 0); - ac97c_writel(chip, MR, AC97C_MR_ENA); - ac97c_writel(chip, CAMR, 0); - ac97c_writel(chip, COMR, 0); - - if (gpio_is_valid(chip->reset_pin)) { - gpio_set_value(chip->reset_pin, 0); - /* AC97 v2.2 specifications says minimum 1 us. */ - udelay(2); - gpio_set_value(chip->reset_pin, 1); - } else { - ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); - udelay(2); - ac97c_writel(chip, MR, AC97C_MR_ENA); - } -} - -static int __devinit atmel_ac97c_probe(struct platform_device *pdev) -{ - struct snd_card *card; - struct atmel_ac97c *chip; - struct resource *regs; - struct ac97c_platform_data *pdata; - struct clk *pclk; - static struct snd_ac97_bus_ops ops = { - .write = atmel_ac97c_write, - .read = atmel_ac97c_read, - }; - int retval; - int irq; - - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!regs) { - dev_dbg(&pdev->dev, "no memory resource\n"); - return -ENXIO; - } - - pdata = pdev->dev.platform_data; - if (!pdata) { - dev_dbg(&pdev->dev, "no platform data\n"); - return -ENXIO; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_dbg(&pdev->dev, "could not get irq\n"); - return -ENXIO; - } - - if (cpu_is_at32ap7000()) { - pclk = clk_get(&pdev->dev, "pclk"); - } else { - pclk = clk_get(&pdev->dev, "ac97_clk"); - } - - if (IS_ERR(pclk)) { - dev_dbg(&pdev->dev, "no peripheral clock\n"); - return PTR_ERR(pclk); - } - clk_enable(pclk); - - retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, - THIS_MODULE, sizeof(struct atmel_ac97c), &card); - if (retval) { - dev_dbg(&pdev->dev, "could not create sound card device\n"); - goto err_snd_card_new; - } - - chip = get_chip(card); - - retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); - if (retval) { - dev_dbg(&pdev->dev, "unable to request irq %d\n", irq); - goto err_request_irq; - } - chip->irq = irq; - - spin_lock_init(&chip->lock); - - strcpy(card->driver, "Atmel AC97C"); - strcpy(card->shortname, "Atmel AC97C"); - sprintf(card->longname, "Atmel AC97 controller"); - - chip->card = card; - chip->pclk = pclk; - chip->pdev = pdev; - chip->regs = ioremap(regs->start, resource_size(regs)); - - if (!chip->regs) { - dev_dbg(&pdev->dev, "could not remap register memory\n"); - goto err_ioremap; - } - - if (gpio_is_valid(pdata->reset_pin)) { - if (gpio_request(pdata->reset_pin, "reset_pin")) { - dev_dbg(&pdev->dev, "reset pin not available\n"); - chip->reset_pin = -ENODEV; - } else { - gpio_direction_output(pdata->reset_pin, 1); - chip->reset_pin = pdata->reset_pin; - } - } - - snd_card_set_dev(card, &pdev->dev); - - atmel_ac97c_reset(chip); - - /* Enable overrun interrupt from codec channel */ - ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); - ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); - - retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); - if (retval) { - dev_dbg(&pdev->dev, "could not register on ac97 bus\n"); - goto err_ac97_bus; - } - - retval = atmel_ac97c_mixer_new(chip); - if (retval) { - dev_dbg(&pdev->dev, "could not register ac97 mixer\n"); - goto err_ac97_bus; - } - - if (cpu_is_at32ap7000()) { - if (pdata->rx_dws.dma_dev) { - dma_cap_mask_t mask; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - chip->dma.rx_chan = dma_request_channel(mask, filter, - &pdata->rx_dws); - if (chip->dma.rx_chan) { - struct dma_slave_config dma_conf = { - .src_addr = regs->start + AC97C_CARHR + - 2, - .src_addr_width = - DMA_SLAVE_BUSWIDTH_2_BYTES, - .src_maxburst = 1, - .dst_maxburst = 1, - .direction = DMA_DEV_TO_MEM, - .device_fc = false, - }; - - dmaengine_slave_config(chip->dma.rx_chan, - &dma_conf); - } - - dev_info(&chip->pdev->dev, "using %s for DMA RX\n", - dev_name(&chip->dma.rx_chan->dev->device)); - set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); - } - - if (pdata->tx_dws.dma_dev) { - dma_cap_mask_t mask; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - chip->dma.tx_chan = dma_request_channel(mask, filter, - &pdata->tx_dws); - if (chip->dma.tx_chan) { - struct dma_slave_config dma_conf = { - .dst_addr = regs->start + AC97C_CATHR + - 2, - .dst_addr_width = - DMA_SLAVE_BUSWIDTH_2_BYTES, - .src_maxburst = 1, - .dst_maxburst = 1, - .direction = DMA_MEM_TO_DEV, - .device_fc = false, - }; - - dmaengine_slave_config(chip->dma.tx_chan, - &dma_conf); - } - - dev_info(&chip->pdev->dev, "using %s for DMA TX\n", - dev_name(&chip->dma.tx_chan->dev->device)); - set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); - } - - if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) && - !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) { - dev_dbg(&pdev->dev, "DMA not available\n"); - retval = -ENODEV; - goto err_dma; - } - } else { - /* Just pretend that we have DMA channel(for at91 i is actually - * the PDC) */ - set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); - set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); - } - - retval = atmel_ac97c_pcm_new(chip); - if (retval) { - dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); - goto err_dma; - } - - retval = snd_card_register(card); - if (retval) { - dev_dbg(&pdev->dev, "could not register sound card\n"); - goto err_dma; - } - - platform_set_drvdata(pdev, card); - - dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", - chip->regs, irq); - - return 0; - -err_dma: - if (cpu_is_at32ap7000()) { - if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) - dma_release_channel(chip->dma.rx_chan); - if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) - dma_release_channel(chip->dma.tx_chan); - clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); - clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); - chip->dma.rx_chan = NULL; - chip->dma.tx_chan = NULL; - } -err_ac97_bus: - snd_card_set_dev(card, NULL); - - if (gpio_is_valid(chip->reset_pin)) - gpio_free(chip->reset_pin); - - iounmap(chip->regs); -err_ioremap: - free_irq(irq, chip); -err_request_irq: - snd_card_free(card); -err_snd_card_new: - clk_disable(pclk); - clk_put(pclk); - return retval; -} - -#ifdef CONFIG_PM -static int atmel_ac97c_suspend(struct platform_device *pdev, pm_message_t msg) -{ - struct snd_card *card = platform_get_drvdata(pdev); - struct atmel_ac97c *chip = card->private_data; - - if (cpu_is_at32ap7000()) { - if (test_bit(DMA_RX_READY, &chip->flags)) - dw_dma_cyclic_stop(chip->dma.rx_chan); - if (test_bit(DMA_TX_READY, &chip->flags)) - dw_dma_cyclic_stop(chip->dma.tx_chan); - } - clk_disable(chip->pclk); - - return 0; -} - -static int atmel_ac97c_resume(struct platform_device *pdev) -{ - struct snd_card *card = platform_get_drvdata(pdev); - struct atmel_ac97c *chip = card->private_data; - - clk_enable(chip->pclk); - if (cpu_is_at32ap7000()) { - if (test_bit(DMA_RX_READY, &chip->flags)) - dw_dma_cyclic_start(chip->dma.rx_chan); - if (test_bit(DMA_TX_READY, &chip->flags)) - dw_dma_cyclic_start(chip->dma.tx_chan); - } - return 0; -} -#else -#define atmel_ac97c_suspend NULL -#define atmel_ac97c_resume NULL -#endif - -static int __devexit atmel_ac97c_remove(struct platform_device *pdev) -{ - struct snd_card *card = platform_get_drvdata(pdev); - struct atmel_ac97c *chip = get_chip(card); - - if (gpio_is_valid(chip->reset_pin)) - gpio_free(chip->reset_pin); - - ac97c_writel(chip, CAMR, 0); - ac97c_writel(chip, COMR, 0); - ac97c_writel(chip, MR, 0); - - clk_disable(chip->pclk); - clk_put(chip->pclk); - iounmap(chip->regs); - free_irq(chip->irq, chip); - - if (cpu_is_at32ap7000()) { - if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags)) - dma_release_channel(chip->dma.rx_chan); - if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) - dma_release_channel(chip->dma.tx_chan); - clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags); - clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags); - chip->dma.rx_chan = NULL; - chip->dma.tx_chan = NULL; - } - - snd_card_set_dev(card, NULL); - snd_card_free(card); - - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static struct platform_driver atmel_ac97c_driver = { - .remove = __devexit_p(atmel_ac97c_remove), - .driver = { - .name = "atmel_ac97c", - }, - .suspend = atmel_ac97c_suspend, - .resume = atmel_ac97c_resume, -}; - -static int __init atmel_ac97c_init(void) -{ - return platform_driver_probe(&atmel_ac97c_driver, - atmel_ac97c_probe); -} -module_init(atmel_ac97c_init); - -static void __exit atmel_ac97c_exit(void) -{ - platform_driver_unregister(&atmel_ac97c_driver); -} -module_exit(atmel_ac97c_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); -MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |