Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Freescale MPC5200 PSC DMA |
| 3 | * ALSA SoC Platform driver |
| 4 | * |
| 5 | * Copyright (C) 2008 Secret Lab Technologies Ltd. |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 6 | * Copyright (C) 2009 Jon Smirl, Digispeaker |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 7 | */ |
| 8 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 9 | #include <linux/module.h> |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 10 | #include <linux/of_device.h> |
Paul Gortmaker | 07a38b1 | 2012-02-25 16:12:30 -0500 | [diff] [blame] | 11 | #include <linux/dma-mapping.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Rob Herring | 5af5073 | 2013-09-17 14:28:33 -0500 | [diff] [blame] | 13 | #include <linux/of_address.h> |
| 14 | #include <linux/of_irq.h> |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 15 | #include <linux/of_platform.h> |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 16 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 17 | #include <sound/soc.h> |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 18 | |
Philippe De Muyter | 9a32299 | 2012-10-12 17:52:45 +0200 | [diff] [blame] | 19 | #include <linux/fsl/bestcomm/bestcomm.h> |
| 20 | #include <linux/fsl/bestcomm/gen_bd.h> |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 21 | #include <asm/mpc52xx_psc.h> |
| 22 | |
| 23 | #include "mpc5200_dma.h" |
| 24 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 25 | /* |
| 26 | * Interrupt handlers |
| 27 | */ |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 28 | static irqreturn_t psc_dma_status_irq(int irq, void *_psc_dma) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 29 | { |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 30 | struct psc_dma *psc_dma = _psc_dma; |
| 31 | struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 32 | u16 isr; |
| 33 | |
| 34 | isr = in_be16(®s->mpc52xx_psc_isr); |
| 35 | |
| 36 | /* Playback underrun error */ |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 37 | if (psc_dma->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP)) |
| 38 | psc_dma->stats.underrun_count++; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 39 | |
| 40 | /* Capture overrun error */ |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 41 | if (psc_dma->capture.active && (isr & MPC52xx_PSC_IMR_ORERR)) |
| 42 | psc_dma->stats.overrun_count++; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 43 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 44 | out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 45 | |
| 46 | return IRQ_HANDLED; |
| 47 | } |
| 48 | |
| 49 | /** |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 50 | * psc_dma_bcom_enqueue_next_buffer - Enqueue another audio buffer |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 51 | * @s: pointer to stream private data structure |
| 52 | * |
| 53 | * Enqueues another audio period buffer into the bestcomm queue. |
| 54 | * |
| 55 | * Note: The routine must only be called when there is space available in |
| 56 | * the queue. Otherwise the enqueue will fail and the audio ring buffer |
| 57 | * will get out of sync |
| 58 | */ |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 59 | static void psc_dma_bcom_enqueue_next_buffer(struct psc_dma_stream *s) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 60 | { |
| 61 | struct bcom_bd *bd; |
| 62 | |
| 63 | /* Prepare and enqueue the next buffer descriptor */ |
| 64 | bd = bcom_prepare_next_buffer(s->bcom_task); |
| 65 | bd->status = s->period_bytes; |
Grant Likely | 8f159d7 | 2009-11-07 01:33:53 -0700 | [diff] [blame] | 66 | bd->data[0] = s->runtime->dma_addr + (s->period_next * s->period_bytes); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 67 | bcom_submit_next_buffer(s->bcom_task, NULL); |
| 68 | |
| 69 | /* Update for next period */ |
Grant Likely | 8f159d7 | 2009-11-07 01:33:53 -0700 | [diff] [blame] | 70 | s->period_next = (s->period_next + 1) % s->runtime->periods; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | /* Bestcomm DMA irq handler */ |
Grant Likely | a68cc8d | 2009-11-09 09:40:09 -0700 | [diff] [blame] | 74 | static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 75 | { |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 76 | struct psc_dma_stream *s = _psc_dma_stream; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 77 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 78 | spin_lock(&s->psc_dma->lock); |
| 79 | /* For each finished period, dequeue the completed period buffer |
| 80 | * and enqueue a new one in it's place. */ |
| 81 | while (bcom_buffer_done(s->bcom_task)) { |
| 82 | bcom_retrieve_buffer(s->bcom_task, NULL, NULL); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 83 | |
Grant Likely | 8f159d7 | 2009-11-07 01:33:53 -0700 | [diff] [blame] | 84 | s->period_current = (s->period_current+1) % s->runtime->periods; |
Grant Likely | c487827 | 2009-11-07 01:34:18 -0700 | [diff] [blame] | 85 | s->period_count++; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 86 | |
| 87 | psc_dma_bcom_enqueue_next_buffer(s); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 88 | } |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 89 | spin_unlock(&s->psc_dma->lock); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 90 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 91 | /* If the stream is active, then also inform the PCM middle layer |
| 92 | * of the period finished event. */ |
| 93 | if (s->active) |
| 94 | snd_pcm_period_elapsed(s->stream); |
| 95 | |
| 96 | return IRQ_HANDLED; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 97 | } |
| 98 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 99 | static int psc_dma_hw_free(struct snd_pcm_substream *substream) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 100 | { |
| 101 | snd_pcm_set_runtime_buffer(substream, NULL); |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | /** |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 106 | * psc_dma_trigger: start and stop the DMA transfer. |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 107 | * |
| 108 | * This function is called by ALSA to start, stop, pause, and resume the DMA |
| 109 | * transfer of data. |
| 110 | */ |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 111 | static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 112 | { |
| 113 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 114 | struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 115 | struct snd_pcm_runtime *runtime = substream->runtime; |
Grant Likely | 1d8222e | 2009-11-07 01:34:31 -0700 | [diff] [blame] | 116 | struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma); |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 117 | struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 118 | u16 imr; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 119 | unsigned long flags; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 120 | int i; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 121 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 122 | switch (cmd) { |
| 123 | case SNDRV_PCM_TRIGGER_START: |
Grant Likely | c487827 | 2009-11-07 01:34:18 -0700 | [diff] [blame] | 124 | dev_dbg(psc_dma->dev, "START: stream=%i fbits=%u ps=%u #p=%u\n", |
| 125 | substream->pstr->stream, runtime->frame_bits, |
| 126 | (int)runtime->period_size, runtime->periods); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 127 | s->period_bytes = frames_to_bytes(runtime, |
| 128 | runtime->period_size); |
Grant Likely | 8f159d7 | 2009-11-07 01:33:53 -0700 | [diff] [blame] | 129 | s->period_next = 0; |
| 130 | s->period_current = 0; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 131 | s->active = 1; |
Grant Likely | c487827 | 2009-11-07 01:34:18 -0700 | [diff] [blame] | 132 | s->period_count = 0; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 133 | s->runtime = runtime; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 134 | |
| 135 | /* Fill up the bestcomm bd queue and enable DMA. |
| 136 | * This will begin filling the PSC's fifo. |
| 137 | */ |
| 138 | spin_lock_irqsave(&psc_dma->lock, flags); |
| 139 | |
Grant Likely | d56b6eb | 2009-11-07 01:34:05 -0700 | [diff] [blame] | 140 | if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 141 | bcom_gen_bd_rx_reset(s->bcom_task); |
Grant Likely | d56b6eb | 2009-11-07 01:34:05 -0700 | [diff] [blame] | 142 | else |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 143 | bcom_gen_bd_tx_reset(s->bcom_task); |
Grant Likely | d56b6eb | 2009-11-07 01:34:05 -0700 | [diff] [blame] | 144 | |
| 145 | for (i = 0; i < runtime->periods; i++) |
| 146 | if (!bcom_queue_full(s->bcom_task)) |
| 147 | psc_dma_bcom_enqueue_next_buffer(s); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 148 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 149 | bcom_enable(s->bcom_task); |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 150 | spin_unlock_irqrestore(&psc_dma->lock, flags); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 151 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 152 | out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); |
| 153 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 154 | break; |
| 155 | |
| 156 | case SNDRV_PCM_TRIGGER_STOP: |
Grant Likely | c487827 | 2009-11-07 01:34:18 -0700 | [diff] [blame] | 157 | dev_dbg(psc_dma->dev, "STOP: stream=%i periods_count=%i\n", |
| 158 | substream->pstr->stream, s->period_count); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 159 | s->active = 0; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 160 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 161 | spin_lock_irqsave(&psc_dma->lock, flags); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 162 | bcom_disable(s->bcom_task); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 163 | if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 164 | bcom_gen_bd_rx_reset(s->bcom_task); |
| 165 | else |
| 166 | bcom_gen_bd_tx_reset(s->bcom_task); |
| 167 | spin_unlock_irqrestore(&psc_dma->lock, flags); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 168 | |
| 169 | break; |
| 170 | |
| 171 | default: |
Grant Likely | c487827 | 2009-11-07 01:34:18 -0700 | [diff] [blame] | 172 | dev_dbg(psc_dma->dev, "unhandled trigger: stream=%i cmd=%i\n", |
| 173 | substream->pstr->stream, cmd); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 174 | return -EINVAL; |
| 175 | } |
| 176 | |
| 177 | /* Update interrupt enable settings */ |
| 178 | imr = 0; |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 179 | if (psc_dma->playback.active) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 180 | imr |= MPC52xx_PSC_IMR_TXEMP; |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 181 | if (psc_dma->capture.active) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 182 | imr |= MPC52xx_PSC_IMR_ORERR; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 183 | out_be16(®s->isr_imr.imr, psc_dma->imr | imr); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 188 | |
| 189 | /* --------------------------------------------------------------------- |
| 190 | * The PSC DMA 'ASoC platform' driver |
| 191 | * |
| 192 | * Can be referenced by an 'ASoC machine' driver |
| 193 | * This driver only deals with the audio bus; it doesn't have any |
| 194 | * interaction with the attached codec |
| 195 | */ |
| 196 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 197 | static const struct snd_pcm_hardware psc_dma_hardware = { |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 198 | .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
| 199 | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 200 | SNDRV_PCM_INFO_BATCH, |
| 201 | .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 202 | SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 203 | .period_bytes_max = 1024 * 1024, |
| 204 | .period_bytes_min = 32, |
| 205 | .periods_min = 2, |
| 206 | .periods_max = 256, |
| 207 | .buffer_bytes_max = 2 * 1024 * 1024, |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 208 | .fifo_size = 512, |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 209 | }; |
| 210 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 211 | static int psc_dma_open(struct snd_pcm_substream *substream) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 212 | { |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 213 | struct snd_pcm_runtime *runtime = substream->runtime; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 214 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 215 | struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 216 | struct psc_dma_stream *s; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 217 | int rc; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 218 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 219 | dev_dbg(psc_dma->dev, "psc_dma_open(substream=%p)\n", substream); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 220 | |
| 221 | if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 222 | s = &psc_dma->capture; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 223 | else |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 224 | s = &psc_dma->playback; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 225 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 226 | snd_soc_set_runtime_hwparams(substream, &psc_dma_hardware); |
| 227 | |
| 228 | rc = snd_pcm_hw_constraint_integer(runtime, |
| 229 | SNDRV_PCM_HW_PARAM_PERIODS); |
| 230 | if (rc < 0) { |
| 231 | dev_err(substream->pcm->card->dev, "invalid buffer size\n"); |
| 232 | return rc; |
| 233 | } |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 234 | |
| 235 | s->stream = substream; |
| 236 | return 0; |
| 237 | } |
| 238 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 239 | static int psc_dma_close(struct snd_pcm_substream *substream) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 240 | { |
| 241 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 242 | struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 243 | struct psc_dma_stream *s; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 244 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 245 | dev_dbg(psc_dma->dev, "psc_dma_close(substream=%p)\n", substream); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 246 | |
| 247 | if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 248 | s = &psc_dma->capture; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 249 | else |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 250 | s = &psc_dma->playback; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 251 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 252 | if (!psc_dma->playback.active && |
| 253 | !psc_dma->capture.active) { |
| 254 | |
| 255 | /* Disable all interrupts and reset the PSC */ |
| 256 | out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); |
| 257 | out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */ |
| 258 | } |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 259 | s->stream = NULL; |
| 260 | return 0; |
| 261 | } |
| 262 | |
| 263 | static snd_pcm_uframes_t |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 264 | psc_dma_pointer(struct snd_pcm_substream *substream) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 265 | { |
| 266 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 267 | struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 268 | struct psc_dma_stream *s; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 269 | dma_addr_t count; |
| 270 | |
| 271 | if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 272 | s = &psc_dma->capture; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 273 | else |
Jon Smirl | cebe776 | 2009-05-23 19:13:01 -0400 | [diff] [blame] | 274 | s = &psc_dma->playback; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 275 | |
Grant Likely | 8f159d7 | 2009-11-07 01:33:53 -0700 | [diff] [blame] | 276 | count = s->period_current * s->period_bytes; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 277 | |
| 278 | return bytes_to_frames(substream->runtime, count); |
| 279 | } |
| 280 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 281 | static int |
| 282 | psc_dma_hw_params(struct snd_pcm_substream *substream, |
| 283 | struct snd_pcm_hw_params *params) |
| 284 | { |
| 285 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | static struct snd_pcm_ops psc_dma_ops = { |
| 291 | .open = psc_dma_open, |
| 292 | .close = psc_dma_close, |
| 293 | .hw_free = psc_dma_hw_free, |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 294 | .ioctl = snd_pcm_lib_ioctl, |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 295 | .pointer = psc_dma_pointer, |
| 296 | .trigger = psc_dma_trigger, |
| 297 | .hw_params = psc_dma_hw_params, |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 298 | }; |
| 299 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 300 | static int psc_dma_new(struct snd_soc_pcm_runtime *rtd) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 301 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 302 | struct snd_card *card = rtd->card->snd_card; |
| 303 | struct snd_soc_dai *dai = rtd->cpu_dai; |
| 304 | struct snd_pcm *pcm = rtd->pcm; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 305 | struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 306 | size_t size = psc_dma_hardware.buffer_bytes_max; |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 307 | int rc; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 308 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 309 | dev_dbg(rtd->platform->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n", |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 310 | card, dai, pcm); |
| 311 | |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 312 | rc = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
| 313 | if (rc) |
| 314 | return rc; |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 315 | |
Joachim Eastwood | 6296914 | 2012-01-01 02:14:24 +0100 | [diff] [blame] | 316 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 317 | rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev, |
Joachim Eastwood | 6296914 | 2012-01-01 02:14:24 +0100 | [diff] [blame] | 318 | size, &pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->dma_buffer); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 319 | if (rc) |
| 320 | goto playback_alloc_err; |
| 321 | } |
| 322 | |
Joachim Eastwood | 6296914 | 2012-01-01 02:14:24 +0100 | [diff] [blame] | 323 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 324 | rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev, |
Joachim Eastwood | 6296914 | 2012-01-01 02:14:24 +0100 | [diff] [blame] | 325 | size, &pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->dma_buffer); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 326 | if (rc) |
| 327 | goto capture_alloc_err; |
| 328 | } |
| 329 | |
| 330 | return 0; |
| 331 | |
| 332 | capture_alloc_err: |
Joachim Eastwood | 6296914 | 2012-01-01 02:14:24 +0100 | [diff] [blame] | 333 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
| 334 | snd_dma_free_pages(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->dma_buffer); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 335 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 336 | playback_alloc_err: |
| 337 | dev_err(card->dev, "Cannot allocate buffer(s)\n"); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 338 | |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 339 | return -ENOMEM; |
| 340 | } |
| 341 | |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 342 | static void psc_dma_free(struct snd_pcm *pcm) |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 343 | { |
| 344 | struct snd_soc_pcm_runtime *rtd = pcm->private_data; |
| 345 | struct snd_pcm_substream *substream; |
| 346 | int stream; |
| 347 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 348 | dev_dbg(rtd->platform->dev, "psc_dma_free(pcm=%p)\n", pcm); |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 349 | |
| 350 | for (stream = 0; stream < 2; stream++) { |
| 351 | substream = pcm->streams[stream].substream; |
| 352 | if (substream) { |
| 353 | snd_dma_free_pages(&substream->dma_buffer); |
| 354 | substream->dma_buffer.area = NULL; |
| 355 | substream->dma_buffer.addr = 0; |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 360 | static struct snd_soc_platform_driver mpc5200_audio_dma_platform = { |
| 361 | .ops = &psc_dma_ops, |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 362 | .pcm_new = &psc_dma_new, |
| 363 | .pcm_free = &psc_dma_free, |
Jon Smirl | 89dd084 | 2009-05-23 19:12:59 -0400 | [diff] [blame] | 364 | }; |
| 365 | |
Eric Millbrandt | f515b67 | 2012-09-13 17:43:11 -0400 | [diff] [blame] | 366 | int mpc5200_audio_dma_create(struct platform_device *op) |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 367 | { |
| 368 | phys_addr_t fifo; |
| 369 | struct psc_dma *psc_dma; |
| 370 | struct resource res; |
| 371 | int size, irq, rc; |
| 372 | const __be32 *prop; |
| 373 | void __iomem *regs; |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 374 | int ret; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 375 | |
| 376 | /* Fetch the registers and IRQ of the PSC */ |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 377 | irq = irq_of_parse_and_map(op->dev.of_node, 0); |
| 378 | if (of_address_to_resource(op->dev.of_node, 0, &res)) { |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 379 | dev_err(&op->dev, "Missing reg property\n"); |
| 380 | return -ENODEV; |
| 381 | } |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 382 | regs = ioremap(res.start, resource_size(&res)); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 383 | if (!regs) { |
| 384 | dev_err(&op->dev, "Could not map registers\n"); |
| 385 | return -ENODEV; |
| 386 | } |
| 387 | |
| 388 | /* Allocate and initialize the driver private data */ |
| 389 | psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL); |
| 390 | if (!psc_dma) { |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 391 | ret = -ENOMEM; |
| 392 | goto out_unmap; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | /* Get the PSC ID */ |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 396 | prop = of_get_property(op->dev.of_node, "cell-index", &size); |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 397 | if (!prop || size < sizeof *prop) { |
| 398 | ret = -ENODEV; |
| 399 | goto out_free; |
| 400 | } |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 401 | |
| 402 | spin_lock_init(&psc_dma->lock); |
Grant Likely | 0827d6b | 2009-07-02 11:57:25 -0600 | [diff] [blame] | 403 | mutex_init(&psc_dma->mutex); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 404 | psc_dma->id = be32_to_cpu(*prop); |
| 405 | psc_dma->irq = irq; |
| 406 | psc_dma->psc_regs = regs; |
| 407 | psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs; |
| 408 | psc_dma->dev = &op->dev; |
| 409 | psc_dma->playback.psc_dma = psc_dma; |
| 410 | psc_dma->capture.psc_dma = psc_dma; |
| 411 | snprintf(psc_dma->name, sizeof psc_dma->name, "PSC%u", psc_dma->id); |
| 412 | |
| 413 | /* Find the address of the fifo data registers and setup the |
| 414 | * DMA tasks */ |
| 415 | fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32); |
| 416 | psc_dma->capture.bcom_task = |
| 417 | bcom_psc_gen_bd_rx_init(psc_dma->id, 10, fifo, 512); |
| 418 | psc_dma->playback.bcom_task = |
| 419 | bcom_psc_gen_bd_tx_init(psc_dma->id, 10, fifo); |
| 420 | if (!psc_dma->capture.bcom_task || |
| 421 | !psc_dma->playback.bcom_task) { |
| 422 | dev_err(&op->dev, "Could not allocate bestcomm tasks\n"); |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 423 | ret = -ENODEV; |
| 424 | goto out_free; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | /* Disable all interrupts and reset the PSC */ |
| 428 | out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); |
| 429 | /* reset receiver */ |
| 430 | out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_RX); |
| 431 | /* reset transmitter */ |
| 432 | out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_TX); |
| 433 | /* reset error */ |
| 434 | out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_ERR_STAT); |
| 435 | /* reset mode */ |
| 436 | out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_SEL_MODE_REG_1); |
| 437 | |
| 438 | /* Set up mode register; |
| 439 | * First write: RxRdy (FIFO Alarm) generates rx FIFO irq |
| 440 | * Second write: register Normal mode for non loopback |
| 441 | */ |
| 442 | out_8(&psc_dma->psc_regs->mode, 0); |
| 443 | out_8(&psc_dma->psc_regs->mode, 0); |
| 444 | |
| 445 | /* Set the TX and RX fifo alarm thresholds */ |
| 446 | out_be16(&psc_dma->fifo_regs->rfalarm, 0x100); |
| 447 | out_8(&psc_dma->fifo_regs->rfcntl, 0x4); |
| 448 | out_be16(&psc_dma->fifo_regs->tfalarm, 0x100); |
| 449 | out_8(&psc_dma->fifo_regs->tfcntl, 0x7); |
| 450 | |
| 451 | /* Lookup the IRQ numbers */ |
| 452 | psc_dma->playback.irq = |
| 453 | bcom_get_task_irq(psc_dma->playback.bcom_task); |
| 454 | psc_dma->capture.irq = |
| 455 | bcom_get_task_irq(psc_dma->capture.bcom_task); |
| 456 | |
| 457 | rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED, |
| 458 | "psc-dma-status", psc_dma); |
Grant Likely | a68cc8d | 2009-11-09 09:40:09 -0700 | [diff] [blame] | 459 | rc |= request_irq(psc_dma->capture.irq, &psc_dma_bcom_irq, IRQF_SHARED, |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 460 | "psc-dma-capture", &psc_dma->capture); |
Grant Likely | a68cc8d | 2009-11-09 09:40:09 -0700 | [diff] [blame] | 461 | rc |= request_irq(psc_dma->playback.irq, &psc_dma_bcom_irq, IRQF_SHARED, |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 462 | "psc-dma-playback", &psc_dma->playback); |
| 463 | if (rc) { |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 464 | ret = -ENODEV; |
| 465 | goto out_irq; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | /* Save what we've done so it can be found again later */ |
| 469 | dev_set_drvdata(&op->dev, psc_dma); |
| 470 | |
| 471 | /* Tell the ASoC OF helpers about it */ |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 472 | return snd_soc_register_platform(&op->dev, &mpc5200_audio_dma_platform); |
Julia Lawall | 33d7f77 | 2009-09-12 14:25:35 +0200 | [diff] [blame] | 473 | out_irq: |
| 474 | free_irq(psc_dma->irq, psc_dma); |
| 475 | free_irq(psc_dma->capture.irq, &psc_dma->capture); |
| 476 | free_irq(psc_dma->playback.irq, &psc_dma->playback); |
| 477 | out_free: |
| 478 | kfree(psc_dma); |
| 479 | out_unmap: |
| 480 | iounmap(regs); |
| 481 | return ret; |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 482 | } |
Eric Millbrandt | f515b67 | 2012-09-13 17:43:11 -0400 | [diff] [blame] | 483 | EXPORT_SYMBOL_GPL(mpc5200_audio_dma_create); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 484 | |
Eric Millbrandt | f515b67 | 2012-09-13 17:43:11 -0400 | [diff] [blame] | 485 | int mpc5200_audio_dma_destroy(struct platform_device *op) |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 486 | { |
| 487 | struct psc_dma *psc_dma = dev_get_drvdata(&op->dev); |
| 488 | |
| 489 | dev_dbg(&op->dev, "mpc5200_audio_dma_destroy()\n"); |
| 490 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 491 | snd_soc_unregister_platform(&op->dev); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 492 | |
| 493 | bcom_gen_bd_rx_release(psc_dma->capture.bcom_task); |
| 494 | bcom_gen_bd_tx_release(psc_dma->playback.bcom_task); |
| 495 | |
| 496 | /* Release irqs */ |
| 497 | free_irq(psc_dma->irq, psc_dma); |
| 498 | free_irq(psc_dma->capture.irq, &psc_dma->capture); |
| 499 | free_irq(psc_dma->playback.irq, &psc_dma->playback); |
| 500 | |
| 501 | iounmap(psc_dma->psc_regs); |
| 502 | kfree(psc_dma); |
| 503 | dev_set_drvdata(&op->dev, NULL); |
| 504 | |
| 505 | return 0; |
| 506 | } |
Eric Millbrandt | f515b67 | 2012-09-13 17:43:11 -0400 | [diff] [blame] | 507 | EXPORT_SYMBOL_GPL(mpc5200_audio_dma_destroy); |
Jon Smirl | dbcc347 | 2009-05-26 08:34:08 -0400 | [diff] [blame] | 508 | |
| 509 | MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); |
| 510 | MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver"); |
| 511 | MODULE_LICENSE("GPL"); |