| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans-Christian Noren Egtvedt | 3243 | 75.93% | 6 | 20.00% |
| Sedji Gaouaou | 687 | 16.09% | 2 | 6.67% |
| Andy Shevchenko | 192 | 4.50% | 2 | 6.67% |
| Alexander Stein | 48 | 1.12% | 4 | 13.33% |
| Takashi Iwai | 31 | 0.73% | 4 | 13.33% |
| Bo Shen | 28 | 0.66% | 1 | 3.33% |
| Arvind Yadav | 14 | 0.33% | 3 | 10.00% |
| Eldad Zack | 6 | 0.14% | 1 | 3.33% |
| Christophe Jaillet | 5 | 0.12% | 1 | 3.33% |
| Julia Lawall | 5 | 0.12% | 1 | 3.33% |
| Gustavo A. R. Silva | 4 | 0.09% | 1 | 3.33% |
| Joe Perches | 3 | 0.07% | 1 | 3.33% |
| Viresh Kumar | 3 | 0.07% | 1 | 3.33% |
| Bhumika Goyal | 1 | 0.02% | 1 | 3.33% |
| Yegor Yefremov | 1 | 0.02% | 1 | 3.33% |
| Total | 4271 | 30 |
/* * 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/atmel_pdc.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/mutex.h> #include <linux/types.h> #include <linux/io.h> #include <linux/of.h> #include <linux/of_device.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/memalloc.h> #include "ac97c.h" /* Serialize access to opened variable */ static DEFINE_MUTEX(opened_mutex); struct atmel_ac97c { struct clk *pclk; struct platform_device *pdev; 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; int playback_period, capture_period; /* Serialize access to opened variable */ spinlock_t lock; void __iomem *regs; int irq; int opened; struct gpio_desc *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) static const 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 = pcm_format_to_bits(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 = pcm_format_to_bits(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; /* 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; /* 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_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: 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); /* 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: 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); /* 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; 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: 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: ptcr |= ATMEL_PDC_TXTDIS; if (chip->opened <= 1) camr &= ~AC97C_CMR_CENA; break; default: return -EINVAL; } ac97c_writel(chip, CAMR, camr); writel(ptcr, chip->regs + ATMEL_PDC_PTCR); return 0; } 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; 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: 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: ptcr |= ATMEL_PDC_RXTDIS; if (chip->opened <= 1) camr &= ~AC97C_CMR_CENA; break; default: return -EINVAL; } ac97c_writel(chip, CAMR, camr); writel(ptcr, chip->regs + ATMEL_PDC_PTCR); return 0; } 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; 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; 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 const 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 = snd_pcm_lib_free_pages, .prepare = atmel_ac97c_playback_prepare, .trigger = atmel_ac97c_playback_trigger, .pointer = atmel_ac97c_playback_pointer, }; static const 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 = snd_pcm_lib_free_pages, .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 ((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 const struct ac97_pcm at91_ac97_pcm_defs[] = { /* 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 atmel_ac97c_pcm_new(struct atmel_ac97c *chip) { struct snd_pcm *pcm; struct snd_pcm_hardware hw = atmel_ac97c_hw; int retval; retval = snd_ac97_pcm_assign(chip->ac97_bus, ARRAY_SIZE(at91_ac97_pcm_defs), at91_ac97_pcm_defs); if (retval) return retval; retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); if (retval) return retval; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &atmel_ac97_capture_ops); 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 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 (!IS_ERR(chip->reset_pin)) { gpiod_set_value(chip->reset_pin, 0); /* AC97 v2.2 specifications says minimum 1 us. */ udelay(2); gpiod_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 const struct of_device_id atmel_ac97c_dt_ids[] = { { .compatible = "atmel,at91sam9263-ac97c", }, { } }; MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids); static int atmel_ac97c_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct snd_card *card; struct atmel_ac97c *chip; struct resource *regs; 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; } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_dbg(&pdev->dev, "could not get irq: %d\n", irq); return irq; } pclk = clk_get(&pdev->dev, "ac97_clk"); if (IS_ERR(pclk)) { dev_dbg(&pdev->dev, "no peripheral clock\n"); return PTR_ERR(pclk); } retval = clk_prepare_enable(pclk); if (retval) goto err_prepare_enable; retval = snd_card_new(&pdev->dev, 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"); retval = -ENOMEM; goto err_ioremap; } chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH); if (IS_ERR(chip->reset_pin)) dev_dbg(dev, "reset pin not available\n"); 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; } retval = atmel_ac97c_pcm_new(chip); if (retval) { dev_dbg(&pdev->dev, "could not register ac97 pcm device\n"); goto err_ac97_bus; } retval = snd_card_register(card); if (retval) { dev_dbg(&pdev->dev, "could not register sound card\n"); goto err_ac97_bus; } platform_set_drvdata(pdev, card); dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n", chip->regs, irq); return 0; err_ac97_bus: iounmap(chip->regs); err_ioremap: free_irq(irq, chip); err_request_irq: snd_card_free(card); err_snd_card_new: clk_disable_unprepare(pclk); err_prepare_enable: clk_put(pclk); return retval; } #ifdef CONFIG_PM_SLEEP static int atmel_ac97c_suspend(struct device *pdev) { struct snd_card *card = dev_get_drvdata(pdev); struct atmel_ac97c *chip = card->private_data; clk_disable_unprepare(chip->pclk); return 0; } static int atmel_ac97c_resume(struct device *pdev) { struct snd_card *card = dev_get_drvdata(pdev); struct atmel_ac97c *chip = card->private_data; int ret = clk_prepare_enable(chip->pclk); return ret; } static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume); #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm #else #define ATMEL_AC97C_PM_OPS NULL #endif static int atmel_ac97c_remove(struct platform_device *pdev) { struct snd_card *card = platform_get_drvdata(pdev); struct atmel_ac97c *chip = get_chip(card); ac97c_writel(chip, CAMR, 0); ac97c_writel(chip, COMR, 0); ac97c_writel(chip, MR, 0); clk_disable_unprepare(chip->pclk); clk_put(chip->pclk); iounmap(chip->regs); free_irq(chip->irq, chip); snd_card_free(card); return 0; } static struct platform_driver atmel_ac97c_driver = { .probe = atmel_ac97c_probe, .remove = atmel_ac97c_remove, .driver = { .name = "atmel_ac97c", .pm = ATMEL_AC97C_PM_OPS, .of_match_table = atmel_ac97c_dt_ids, }, }; module_platform_driver(atmel_ac97c_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Driver for Atmel AC97 controller"); MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
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