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sound/atmel/ac97c.c
30.2 KB
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/* |
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* Driver for Atmel AC97C |
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* * 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> |
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#include <linux/device.h> |
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#include <linux/dmaengine.h> #include <linux/dma-mapping.h> |
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#include <linux/atmel_pdc.h> |
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#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/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> |
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#include <mach/cpu.h> |
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#include <mach/gpio.h> |
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#ifdef CONFIG_ARCH_AT91 #include <mach/hardware.h> #endif |
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#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; |
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int playback_period, capture_period; |
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/* Serialize access to opened variable */ spinlock_t lock; void __iomem *regs; |
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int irq; |
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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_data_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 "); return -EINVAL; } if (direction == DMA_TO_DEVICE) 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 "); return PTR_ERR(cdesc); } if (direction == DMA_TO_DEVICE) { 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, |
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.buffer_bytes_max = 2 * 2 * 64 * 2048, |
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.period_bytes_min = 4096, .period_bytes_max = 4096, |
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.periods_min = 6, |
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.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. */ |
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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); } |
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/* 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. */ |
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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); } |
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/* 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); |
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if (cpu_is_at32ap7000()) { if (test_and_clear_bit(DMA_TX_READY, &chip->flags)) dw_dma_cyclic_free(chip->dma.tx_chan); } |
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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); |
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if (cpu_is_at32ap7000()) { if (test_and_clear_bit(DMA_RX_READY, &chip->flags)) dw_dma_cyclic_free(chip->dma.rx_chan); } |
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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; |
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int block_size = frames_to_bytes(runtime, runtime->period_size); |
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unsigned long word = ac97c_readl(chip, OCA); |
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int retval; |
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chip->playback_period = 0; |
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word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
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/* 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; |
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} ac97c_writel(chip, OCA, word); /* configure sample format and size */ |
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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; |
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switch (runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: |
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if (cpu_is_at32ap7000()) word |= AC97C_CMR_CEM_LITTLE; |
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break; case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
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word &= ~(AC97C_CMR_CEM_LITTLE); break; |
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default: word = ac97c_readl(chip, OCA); word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); ac97c_writel(chip, OCA, word); return -EINVAL; |
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} |
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/* Enable underrun interrupt on channel A */ word |= AC97C_CSR_UNRUN; |
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ac97c_writel(chip, CAMR, word); |
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/* Enable channel A event interrupt */ word = ac97c_readl(chip, IMR); word |= AC97C_SR_CAEVT; ac97c_writel(chip, IER, word); |
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/* 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 ", runtime->rate); |
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if (cpu_is_at32ap7000()) { if (!test_bit(DMA_TX_READY, &chip->flags)) retval = atmel_ac97c_prepare_dma(chip, substream, DMA_TO_DEVICE); } 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); } |
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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; |
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int block_size = frames_to_bytes(runtime, runtime->period_size); |
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unsigned long word = ac97c_readl(chip, ICA); |
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int retval; |
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chip->capture_period = 0; |
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word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); |
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/* 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; |
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} ac97c_writel(chip, ICA, word); /* configure sample format and size */ |
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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; |
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switch (runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: |
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if (cpu_is_at32ap7000()) word |= AC97C_CMR_CEM_LITTLE; |
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break; case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ |
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word &= ~(AC97C_CMR_CEM_LITTLE); break; |
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default: word = ac97c_readl(chip, ICA); word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); ac97c_writel(chip, ICA, word); return -EINVAL; |
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} |
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/* Enable overrun interrupt on channel A */ word |= AC97C_CSR_OVRUN; |
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ac97c_writel(chip, CAMR, word); |
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/* Enable channel A event interrupt */ word = ac97c_readl(chip, IMR); word |= AC97C_SR_CAEVT; ac97c_writel(chip, IER, word); |
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/* 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 ", runtime->rate); |
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if (cpu_is_at32ap7000()) { if (!test_bit(DMA_RX_READY, &chip->flags)) retval = atmel_ac97c_prepare_dma(chip, substream, DMA_FROM_DEVICE); } 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); } |
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return retval; } static int atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd) { struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); |
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unsigned long camr, ptcr = 0; |
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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: |
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if (cpu_is_at32ap7000()) { retval = dw_dma_cyclic_start(chip->dma.tx_chan); if (retval) goto out; } else { ptcr = ATMEL_PDC_TXTEN; } |
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camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX; |
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break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ case SNDRV_PCM_TRIGGER_STOP: |
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if (cpu_is_at32ap7000()) dw_dma_cyclic_stop(chip->dma.tx_chan); else ptcr |= ATMEL_PDC_TXTDIS; |
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if (chip->opened <= 1) camr &= ~AC97C_CMR_CENA; break; default: retval = -EINVAL; goto out; } ac97c_writel(chip, CAMR, camr); |
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if (!cpu_is_at32ap7000()) writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
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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); |
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unsigned long camr, ptcr = 0; |
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int retval = 0; camr = ac97c_readl(chip, CAMR); |
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ptcr = readl(chip->regs + ATMEL_PDC_PTSR); |
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switch (cmd) { case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ case SNDRV_PCM_TRIGGER_START: |
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if (cpu_is_at32ap7000()) { retval = dw_dma_cyclic_start(chip->dma.rx_chan); if (retval) goto out; } else { ptcr = ATMEL_PDC_RXTEN; } |
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camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; |
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break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ case SNDRV_PCM_TRIGGER_STOP: |
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if (cpu_is_at32ap7000()) dw_dma_cyclic_stop(chip->dma.rx_chan); else ptcr |= (ATMEL_PDC_RXTDIS); |
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if (chip->opened <= 1) camr &= ~AC97C_CMR_CENA; break; default: retval = -EINVAL; break; } ac97c_writel(chip, CAMR, camr); |
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if (!cpu_is_at32ap7000()) writel(ptcr, chip->regs + ATMEL_PDC_PTCR); |
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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; |
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if (cpu_is_at32ap7000()) bytes = dw_dma_get_src_addr(chip->dma.tx_chan); else bytes = readl(chip->regs + ATMEL_PDC_TPR); |
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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; |
7177395fd ALSA: AC97: add A... |
602 603 604 605 |
if (cpu_is_at32ap7000()) bytes = dw_dma_get_dst_addr(chip->dma.rx_chan); else bytes = readl(chip->regs + ATMEL_PDC_RPR); |
4ede028f8 ALSA: Add ALSA dr... |
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 |
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, }; |
df163587e ALSA: snd-atmel-a... |
635 636 637 638 639 640 641 |
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); |
7177395fd ALSA: AC97: add A... |
642 |
u32 camr = ac97c_readl(chip, CAMR); |
df163587e ALSA: snd-atmel-a... |
643 644 |
if (sr & AC97C_SR_CAEVT) { |
7177395fd ALSA: AC97: add A... |
645 646 |
struct snd_pcm_runtime *runtime; int offset, next_period, block_size; |
f53411630 ALSA: atmel: set ... |
647 648 |
dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s ", |
df163587e ALSA: snd-atmel-a... |
649 650 651 652 653 654 |
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" : ""); |
7177395fd ALSA: AC97: add A... |
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 |
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); } } |
df163587e ALSA: snd-atmel-a... |
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 |
retval = IRQ_HANDLED; } if (sr & AC97C_SR_COEVT) { dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s ", 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 ", sr, casr, cosr); } return retval; } |
7177395fd ALSA: AC97: add A... |
721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 |
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), } } }, }; |
4ede028f8 ALSA: Add ALSA dr... |
748 749 750 751 |
static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip) { struct snd_pcm *pcm; struct snd_pcm_hardware hw = atmel_ac97c_hw; |
7177395fd ALSA: AC97: add A... |
752 |
int capture, playback, retval, err; |
4ede028f8 ALSA: Add ALSA dr... |
753 754 755 |
capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags); playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags); |
7177395fd ALSA: AC97: add A... |
756 757 758 759 760 761 762 |
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; } |
4ede028f8 ALSA: Add ALSA dr... |
763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 |
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 "); } 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 "); 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) { |
81baf3a7f ALSA: snd-atmel-a... |
878 879 880 881 |
ac97c_writel(chip, MR, 0); ac97c_writel(chip, MR, AC97C_MR_ENA); ac97c_writel(chip, CAMR, 0); ac97c_writel(chip, COMR, 0); |
4ede028f8 ALSA: Add ALSA dr... |
882 883 884 885 |
if (gpio_is_valid(chip->reset_pin)) { gpio_set_value(chip->reset_pin, 0); /* AC97 v2.2 specifications says minimum 1 us. */ |
81baf3a7f ALSA: snd-atmel-a... |
886 |
udelay(2); |
4ede028f8 ALSA: Add ALSA dr... |
887 |
gpio_set_value(chip->reset_pin, 1); |
8015e3def ALSA: atmel/ac97c... |
888 889 890 891 |
} else { ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA); udelay(2); ac97c_writel(chip, MR, AC97C_MR_ENA); |
4ede028f8 ALSA: Add ALSA dr... |
892 |
} |
4ede028f8 ALSA: Add ALSA dr... |
893 894 895 896 897 898 899 900 901 902 903 904 905 906 |
} 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; |
df163587e ALSA: snd-atmel-a... |
907 |
int irq; |
4ede028f8 ALSA: Add ALSA dr... |
908 909 910 911 912 913 914 915 916 917 918 919 920 921 |
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!regs) { dev_dbg(&pdev->dev, "no memory resource "); return -ENXIO; } pdata = pdev->dev.platform_data; if (!pdata) { dev_dbg(&pdev->dev, "no platform data "); return -ENXIO; } |
df163587e ALSA: snd-atmel-a... |
922 923 924 925 926 927 |
irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_dbg(&pdev->dev, "could not get irq "); return -ENXIO; } |
7177395fd ALSA: AC97: add A... |
928 929 930 931 932 |
if (cpu_is_at32ap7000()) { pclk = clk_get(&pdev->dev, "pclk"); } else { pclk = clk_get(&pdev->dev, "ac97_clk"); } |
4ede028f8 ALSA: Add ALSA dr... |
933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 |
if (IS_ERR(pclk)) { dev_dbg(&pdev->dev, "no peripheral clock "); 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 "); goto err_snd_card_new; } chip = get_chip(card); |
df163587e ALSA: snd-atmel-a... |
949 950 951 952 953 954 955 |
retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip); if (retval) { dev_dbg(&pdev->dev, "unable to request irq %d ", irq); goto err_request_irq; } chip->irq = irq; |
4ede028f8 ALSA: Add ALSA dr... |
956 957 958 959 960 961 962 963 964 |
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; |
28f65c11f treewide: Convert... |
965 |
chip->regs = ioremap(regs->start, resource_size(regs)); |
4ede028f8 ALSA: Add ALSA dr... |
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 |
if (!chip->regs) { dev_dbg(&pdev->dev, "could not remap register memory "); 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 "); 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); |
81baf3a7f ALSA: snd-atmel-a... |
985 |
atmel_ac97c_reset(chip); |
df163587e ALSA: snd-atmel-a... |
986 987 988 |
/* Enable overrun interrupt from codec channel */ ac97c_writel(chip, COMR, AC97C_CSR_OVRUN); ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT); |
4ede028f8 ALSA: Add ALSA dr... |
989 990 991 992 993 994 |
retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus); if (retval) { dev_dbg(&pdev->dev, "could not register on ac97 bus "); goto err_ac97_bus; } |
4ede028f8 ALSA: Add ALSA dr... |
995 996 997 998 999 1000 |
retval = atmel_ac97c_mixer_new(chip); if (retval) { dev_dbg(&pdev->dev, "could not register ac97 mixer "); goto err_ac97_bus; } |
7177395fd ALSA: AC97: add A... |
1001 1002 1003 1004 |
if (cpu_is_at32ap7000()) { if (pdata->rx_dws.dma_dev) { struct dw_dma_slave *dws = &pdata->rx_dws; dma_cap_mask_t mask; |
4ede028f8 ALSA: Add ALSA dr... |
1005 |
|
7177395fd ALSA: AC97: add A... |
1006 |
dws->rx_reg = regs->start + AC97C_CARHR + 2; |
4ede028f8 ALSA: Add ALSA dr... |
1007 |
|
7177395fd ALSA: AC97: add A... |
1008 1009 |
dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); |
4ede028f8 ALSA: Add ALSA dr... |
1010 |
|
7177395fd ALSA: AC97: add A... |
1011 1012 |
chip->dma.rx_chan = dma_request_channel(mask, filter, dws); |
4ede028f8 ALSA: Add ALSA dr... |
1013 |
|
7177395fd ALSA: AC97: add A... |
1014 1015 |
dev_info(&chip->pdev->dev, "using %s for DMA RX ", |
23572856e ALSA: snd-atmel-a... |
1016 |
dev_name(&chip->dma.rx_chan->dev->device)); |
7177395fd ALSA: AC97: add A... |
1017 1018 |
set_bit(DMA_RX_CHAN_PRESENT, &chip->flags); } |
4ede028f8 ALSA: Add ALSA dr... |
1019 |
|
7177395fd ALSA: AC97: add A... |
1020 1021 1022 |
if (pdata->tx_dws.dma_dev) { struct dw_dma_slave *dws = &pdata->tx_dws; dma_cap_mask_t mask; |
4ede028f8 ALSA: Add ALSA dr... |
1023 |
|
7177395fd ALSA: AC97: add A... |
1024 |
dws->tx_reg = regs->start + AC97C_CATHR + 2; |
4ede028f8 ALSA: Add ALSA dr... |
1025 |
|
7177395fd ALSA: AC97: add A... |
1026 1027 |
dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); |
4ede028f8 ALSA: Add ALSA dr... |
1028 |
|
7177395fd ALSA: AC97: add A... |
1029 1030 |
chip->dma.tx_chan = dma_request_channel(mask, filter, dws); |
4ede028f8 ALSA: Add ALSA dr... |
1031 |
|
7177395fd ALSA: AC97: add A... |
1032 1033 |
dev_info(&chip->pdev->dev, "using %s for DMA TX ", |
23572856e ALSA: snd-atmel-a... |
1034 |
dev_name(&chip->dma.tx_chan->dev->device)); |
7177395fd ALSA: AC97: add A... |
1035 1036 |
set_bit(DMA_TX_CHAN_PRESENT, &chip->flags); } |
4ede028f8 ALSA: Add ALSA dr... |
1037 |
|
7177395fd ALSA: AC97: add A... |
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 |
if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) && !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) { dev_dbg(&pdev->dev, "DMA not available "); 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); |
4ede028f8 ALSA: Add ALSA dr... |
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 |
} retval = atmel_ac97c_pcm_new(chip); if (retval) { dev_dbg(&pdev->dev, "could not register ac97 pcm device "); goto err_dma; } retval = snd_card_register(card); if (retval) { dev_dbg(&pdev->dev, "could not register sound card "); |
df163587e ALSA: snd-atmel-a... |
1063 |
goto err_dma; |
4ede028f8 ALSA: Add ALSA dr... |
1064 1065 1066 |
} platform_set_drvdata(pdev, card); |
7177395fd ALSA: AC97: add A... |
1067 1068 1069 |
dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d ", chip->regs, irq); |
4ede028f8 ALSA: Add ALSA dr... |
1070 1071 1072 1073 |
return 0; err_dma: |
7177395fd ALSA: AC97: add A... |
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 |
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; } |
4ede028f8 ALSA: Add ALSA dr... |
1084 1085 1086 1087 1088 1089 1090 1091 |
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: |
df163587e ALSA: snd-atmel-a... |
1092 1093 |
free_irq(irq, chip); err_request_irq: |
4ede028f8 ALSA: Add ALSA dr... |
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 |
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; |
7177395fd ALSA: AC97: add A... |
1106 1107 1108 1109 1110 1111 |
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); } |
4ede028f8 ALSA: Add ALSA dr... |
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 |
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); |
7177395fd ALSA: AC97: add A... |
1123 1124 1125 1126 1127 1128 |
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); } |
4ede028f8 ALSA: Add ALSA dr... |
1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 |
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); |
bd74a1843 ALSA: snd-atmel-a... |
1143 1144 1145 |
ac97c_writel(chip, CAMR, 0); ac97c_writel(chip, COMR, 0); ac97c_writel(chip, MR, 0); |
4ede028f8 ALSA: Add ALSA dr... |
1146 1147 1148 |
clk_disable(chip->pclk); clk_put(chip->pclk); iounmap(chip->regs); |
df163587e ALSA: snd-atmel-a... |
1149 |
free_irq(chip->irq, chip); |
4ede028f8 ALSA: Add ALSA dr... |
1150 |
|
7177395fd ALSA: AC97: add A... |
1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 |
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; } |
4ede028f8 ALSA: Add ALSA dr... |
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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"); |
0cfae7c93 ALSA: atmel - upd... |
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MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>"); |