1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
24ede028fSHans-Christian Egtvedt /*
3128ed6a9SHans-Christian Egtvedt * Driver for Atmel AC97C
44ede028fSHans-Christian Egtvedt *
54ede028fSHans-Christian Egtvedt * Copyright (C) 2005-2009 Atmel Corporation
64ede028fSHans-Christian Egtvedt */
74ede028fSHans-Christian Egtvedt #include <linux/clk.h>
84ede028fSHans-Christian Egtvedt #include <linux/delay.h>
94ede028fSHans-Christian Egtvedt #include <linux/bitmap.h>
10128ed6a9SHans-Christian Egtvedt #include <linux/device.h>
117177395fSSedji Gaouaou #include <linux/atmel_pdc.h>
125f10e849SAndy Shevchenko #include <linux/gpio/consumer.h>
134ede028fSHans-Christian Egtvedt #include <linux/init.h>
144ede028fSHans-Christian Egtvedt #include <linux/interrupt.h>
15*7e9f2839SRob Herring #include <linux/mod_devicetable.h>
164ede028fSHans-Christian Egtvedt #include <linux/module.h>
174ede028fSHans-Christian Egtvedt #include <linux/platform_device.h>
184ede028fSHans-Christian Egtvedt #include <linux/mutex.h>
19e2b35f3dSViresh Kumar #include <linux/types.h>
204ede028fSHans-Christian Egtvedt #include <linux/io.h>
214ede028fSHans-Christian Egtvedt
224ede028fSHans-Christian Egtvedt #include <sound/core.h>
234ede028fSHans-Christian Egtvedt #include <sound/initval.h>
244ede028fSHans-Christian Egtvedt #include <sound/pcm.h>
254ede028fSHans-Christian Egtvedt #include <sound/pcm_params.h>
264ede028fSHans-Christian Egtvedt #include <sound/ac97_codec.h>
274ede028fSHans-Christian Egtvedt #include <sound/memalloc.h>
284ede028fSHans-Christian Egtvedt
294ede028fSHans-Christian Egtvedt #include "ac97c.h"
304ede028fSHans-Christian Egtvedt
314ede028fSHans-Christian Egtvedt /* Serialize access to opened variable */
324ede028fSHans-Christian Egtvedt static DEFINE_MUTEX(opened_mutex);
334ede028fSHans-Christian Egtvedt
344ede028fSHans-Christian Egtvedt struct atmel_ac97c {
354ede028fSHans-Christian Egtvedt struct clk *pclk;
364ede028fSHans-Christian Egtvedt struct platform_device *pdev;
374ede028fSHans-Christian Egtvedt
384ede028fSHans-Christian Egtvedt struct snd_pcm_substream *playback_substream;
394ede028fSHans-Christian Egtvedt struct snd_pcm_substream *capture_substream;
404ede028fSHans-Christian Egtvedt struct snd_card *card;
414ede028fSHans-Christian Egtvedt struct snd_pcm *pcm;
424ede028fSHans-Christian Egtvedt struct snd_ac97 *ac97;
434ede028fSHans-Christian Egtvedt struct snd_ac97_bus *ac97_bus;
444ede028fSHans-Christian Egtvedt
454ede028fSHans-Christian Egtvedt u64 cur_format;
464ede028fSHans-Christian Egtvedt unsigned int cur_rate;
477177395fSSedji Gaouaou int playback_period, capture_period;
484ede028fSHans-Christian Egtvedt /* Serialize access to opened variable */
494ede028fSHans-Christian Egtvedt spinlock_t lock;
504ede028fSHans-Christian Egtvedt void __iomem *regs;
51df163587SHans-Christian Egtvedt int irq;
524ede028fSHans-Christian Egtvedt int opened;
535f10e849SAndy Shevchenko struct gpio_desc *reset_pin;
544ede028fSHans-Christian Egtvedt };
554ede028fSHans-Christian Egtvedt
564ede028fSHans-Christian Egtvedt #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data)
574ede028fSHans-Christian Egtvedt
584ede028fSHans-Christian Egtvedt #define ac97c_writel(chip, reg, val) \
594ede028fSHans-Christian Egtvedt __raw_writel((val), (chip)->regs + AC97C_##reg)
604ede028fSHans-Christian Egtvedt #define ac97c_readl(chip, reg) \
614ede028fSHans-Christian Egtvedt __raw_readl((chip)->regs + AC97C_##reg)
624ede028fSHans-Christian Egtvedt
6385ab3738SBhumika Goyal static const struct snd_pcm_hardware atmel_ac97c_hw = {
644ede028fSHans-Christian Egtvedt .info = (SNDRV_PCM_INFO_MMAP
654ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_MMAP_VALID
664ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_INTERLEAVED
674ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_BLOCK_TRANSFER
684ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_JOINT_DUPLEX
694ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_RESUME
704ede028fSHans-Christian Egtvedt | SNDRV_PCM_INFO_PAUSE),
714ede028fSHans-Christian Egtvedt .formats = (SNDRV_PCM_FMTBIT_S16_BE
724ede028fSHans-Christian Egtvedt | SNDRV_PCM_FMTBIT_S16_LE),
734ede028fSHans-Christian Egtvedt .rates = (SNDRV_PCM_RATE_CONTINUOUS),
744ede028fSHans-Christian Egtvedt .rate_min = 4000,
754ede028fSHans-Christian Egtvedt .rate_max = 48000,
764ede028fSHans-Christian Egtvedt .channels_min = 1,
774ede028fSHans-Christian Egtvedt .channels_max = 2,
78c42eec0fSHans-Christian Egtvedt .buffer_bytes_max = 2 * 2 * 64 * 2048,
794ede028fSHans-Christian Egtvedt .period_bytes_min = 4096,
804ede028fSHans-Christian Egtvedt .period_bytes_max = 4096,
81c42eec0fSHans-Christian Egtvedt .periods_min = 6,
824ede028fSHans-Christian Egtvedt .periods_max = 64,
834ede028fSHans-Christian Egtvedt };
844ede028fSHans-Christian Egtvedt
atmel_ac97c_playback_open(struct snd_pcm_substream * substream)854ede028fSHans-Christian Egtvedt static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream)
864ede028fSHans-Christian Egtvedt {
874ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
884ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
894ede028fSHans-Christian Egtvedt
904ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
914ede028fSHans-Christian Egtvedt chip->opened++;
924ede028fSHans-Christian Egtvedt runtime->hw = atmel_ac97c_hw;
934ede028fSHans-Christian Egtvedt if (chip->cur_rate) {
944ede028fSHans-Christian Egtvedt runtime->hw.rate_min = chip->cur_rate;
954ede028fSHans-Christian Egtvedt runtime->hw.rate_max = chip->cur_rate;
964ede028fSHans-Christian Egtvedt }
974ede028fSHans-Christian Egtvedt if (chip->cur_format)
9874c34ca1SEldad Zack runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
994ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1004ede028fSHans-Christian Egtvedt chip->playback_substream = substream;
1014ede028fSHans-Christian Egtvedt return 0;
1024ede028fSHans-Christian Egtvedt }
1034ede028fSHans-Christian Egtvedt
atmel_ac97c_capture_open(struct snd_pcm_substream * substream)1044ede028fSHans-Christian Egtvedt static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream)
1054ede028fSHans-Christian Egtvedt {
1064ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
1074ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
1084ede028fSHans-Christian Egtvedt
1094ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
1104ede028fSHans-Christian Egtvedt chip->opened++;
1114ede028fSHans-Christian Egtvedt runtime->hw = atmel_ac97c_hw;
1124ede028fSHans-Christian Egtvedt if (chip->cur_rate) {
1134ede028fSHans-Christian Egtvedt runtime->hw.rate_min = chip->cur_rate;
1144ede028fSHans-Christian Egtvedt runtime->hw.rate_max = chip->cur_rate;
1154ede028fSHans-Christian Egtvedt }
1164ede028fSHans-Christian Egtvedt if (chip->cur_format)
11774c34ca1SEldad Zack runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
1184ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1194ede028fSHans-Christian Egtvedt chip->capture_substream = substream;
1204ede028fSHans-Christian Egtvedt return 0;
1214ede028fSHans-Christian Egtvedt }
1224ede028fSHans-Christian Egtvedt
atmel_ac97c_playback_close(struct snd_pcm_substream * substream)1234ede028fSHans-Christian Egtvedt static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream)
1244ede028fSHans-Christian Egtvedt {
1254ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
1264ede028fSHans-Christian Egtvedt
1274ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
1284ede028fSHans-Christian Egtvedt chip->opened--;
1294ede028fSHans-Christian Egtvedt if (!chip->opened) {
1304ede028fSHans-Christian Egtvedt chip->cur_rate = 0;
1314ede028fSHans-Christian Egtvedt chip->cur_format = 0;
1324ede028fSHans-Christian Egtvedt }
1334ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1344ede028fSHans-Christian Egtvedt
1354ede028fSHans-Christian Egtvedt chip->playback_substream = NULL;
1364ede028fSHans-Christian Egtvedt
1374ede028fSHans-Christian Egtvedt return 0;
1384ede028fSHans-Christian Egtvedt }
1394ede028fSHans-Christian Egtvedt
atmel_ac97c_capture_close(struct snd_pcm_substream * substream)1404ede028fSHans-Christian Egtvedt static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream)
1414ede028fSHans-Christian Egtvedt {
1424ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
1434ede028fSHans-Christian Egtvedt
1444ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
1454ede028fSHans-Christian Egtvedt chip->opened--;
1464ede028fSHans-Christian Egtvedt if (!chip->opened) {
1474ede028fSHans-Christian Egtvedt chip->cur_rate = 0;
1484ede028fSHans-Christian Egtvedt chip->cur_format = 0;
1494ede028fSHans-Christian Egtvedt }
1504ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1514ede028fSHans-Christian Egtvedt
1524ede028fSHans-Christian Egtvedt chip->capture_substream = NULL;
1534ede028fSHans-Christian Egtvedt
1544ede028fSHans-Christian Egtvedt return 0;
1554ede028fSHans-Christian Egtvedt }
1564ede028fSHans-Christian Egtvedt
atmel_ac97c_playback_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)1574ede028fSHans-Christian Egtvedt static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream,
1584ede028fSHans-Christian Egtvedt struct snd_pcm_hw_params *hw_params)
1594ede028fSHans-Christian Egtvedt {
1604ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
161020c5260SAndy Shevchenko
1624ede028fSHans-Christian Egtvedt /* Set restrictions to params. */
1634ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
1644ede028fSHans-Christian Egtvedt chip->cur_rate = params_rate(hw_params);
1654ede028fSHans-Christian Egtvedt chip->cur_format = params_format(hw_params);
1664ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1674ede028fSHans-Christian Egtvedt
16837b9b9a5STakashi Iwai return 0;
1694ede028fSHans-Christian Egtvedt }
1704ede028fSHans-Christian Egtvedt
atmel_ac97c_capture_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)1714ede028fSHans-Christian Egtvedt static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
1724ede028fSHans-Christian Egtvedt struct snd_pcm_hw_params *hw_params)
1734ede028fSHans-Christian Egtvedt {
1744ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
1754ede028fSHans-Christian Egtvedt
1764ede028fSHans-Christian Egtvedt /* Set restrictions to params. */
1774ede028fSHans-Christian Egtvedt mutex_lock(&opened_mutex);
1784ede028fSHans-Christian Egtvedt chip->cur_rate = params_rate(hw_params);
1794ede028fSHans-Christian Egtvedt chip->cur_format = params_format(hw_params);
1804ede028fSHans-Christian Egtvedt mutex_unlock(&opened_mutex);
1814ede028fSHans-Christian Egtvedt
18237b9b9a5STakashi Iwai return 0;
1834ede028fSHans-Christian Egtvedt }
1844ede028fSHans-Christian Egtvedt
atmel_ac97c_playback_prepare(struct snd_pcm_substream * substream)1854ede028fSHans-Christian Egtvedt static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
1864ede028fSHans-Christian Egtvedt {
1874ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
1884ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
1897177395fSSedji Gaouaou int block_size = frames_to_bytes(runtime, runtime->period_size);
190128ed6a9SHans-Christian Egtvedt unsigned long word = ac97c_readl(chip, OCA);
1914ede028fSHans-Christian Egtvedt int retval;
1924ede028fSHans-Christian Egtvedt
1937177395fSSedji Gaouaou chip->playback_period = 0;
194128ed6a9SHans-Christian Egtvedt word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
195128ed6a9SHans-Christian Egtvedt
1964ede028fSHans-Christian Egtvedt /* assign channels to AC97C channel A */
1974ede028fSHans-Christian Egtvedt switch (runtime->channels) {
1984ede028fSHans-Christian Egtvedt case 1:
1994ede028fSHans-Christian Egtvedt word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
2004ede028fSHans-Christian Egtvedt break;
2014ede028fSHans-Christian Egtvedt case 2:
2024ede028fSHans-Christian Egtvedt word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
2034ede028fSHans-Christian Egtvedt | AC97C_CH_ASSIGN(PCM_RIGHT, A);
2044ede028fSHans-Christian Egtvedt break;
2054ede028fSHans-Christian Egtvedt default:
2064ede028fSHans-Christian Egtvedt /* TODO: support more than two channels */
2074ede028fSHans-Christian Egtvedt return -EINVAL;
2084ede028fSHans-Christian Egtvedt }
2094ede028fSHans-Christian Egtvedt ac97c_writel(chip, OCA, word);
2104ede028fSHans-Christian Egtvedt
2114ede028fSHans-Christian Egtvedt /* configure sample format and size */
212ec2755a9SSedji Gaouaou word = ac97c_readl(chip, CAMR);
213ec2755a9SSedji Gaouaou if (chip->opened <= 1)
2144ede028fSHans-Christian Egtvedt word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
215ec2755a9SSedji Gaouaou else
216ec2755a9SSedji Gaouaou word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
2174ede028fSHans-Christian Egtvedt
2184ede028fSHans-Christian Egtvedt switch (runtime->format) {
2194ede028fSHans-Christian Egtvedt case SNDRV_PCM_FORMAT_S16_LE:
2204ede028fSHans-Christian Egtvedt break;
2214d6cd8f1STakashi Iwai case SNDRV_PCM_FORMAT_S16_BE:
2224ede028fSHans-Christian Egtvedt word &= ~(AC97C_CMR_CEM_LITTLE);
2234ede028fSHans-Christian Egtvedt break;
224128ed6a9SHans-Christian Egtvedt default:
225128ed6a9SHans-Christian Egtvedt word = ac97c_readl(chip, OCA);
226128ed6a9SHans-Christian Egtvedt word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
227128ed6a9SHans-Christian Egtvedt ac97c_writel(chip, OCA, word);
228128ed6a9SHans-Christian Egtvedt return -EINVAL;
2294ede028fSHans-Christian Egtvedt }
2304ede028fSHans-Christian Egtvedt
231df163587SHans-Christian Egtvedt /* Enable underrun interrupt on channel A */
232df163587SHans-Christian Egtvedt word |= AC97C_CSR_UNRUN;
233df163587SHans-Christian Egtvedt
2344ede028fSHans-Christian Egtvedt ac97c_writel(chip, CAMR, word);
2354ede028fSHans-Christian Egtvedt
236df163587SHans-Christian Egtvedt /* Enable channel A event interrupt */
237df163587SHans-Christian Egtvedt word = ac97c_readl(chip, IMR);
238df163587SHans-Christian Egtvedt word |= AC97C_SR_CAEVT;
239df163587SHans-Christian Egtvedt ac97c_writel(chip, IER, word);
240df163587SHans-Christian Egtvedt
2414ede028fSHans-Christian Egtvedt /* set variable rate if needed */
2424ede028fSHans-Christian Egtvedt if (runtime->rate != 48000) {
2434ede028fSHans-Christian Egtvedt word = ac97c_readl(chip, MR);
2444ede028fSHans-Christian Egtvedt word |= AC97C_MR_VRA;
2454ede028fSHans-Christian Egtvedt ac97c_writel(chip, MR, word);
2464ede028fSHans-Christian Egtvedt } else {
2474ede028fSHans-Christian Egtvedt word = ac97c_readl(chip, MR);
2484ede028fSHans-Christian Egtvedt word &= ~(AC97C_MR_VRA);
2494ede028fSHans-Christian Egtvedt ac97c_writel(chip, MR, word);
2504ede028fSHans-Christian Egtvedt }
2514ede028fSHans-Christian Egtvedt
2524ede028fSHans-Christian Egtvedt retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,
2534ede028fSHans-Christian Egtvedt runtime->rate);
2544ede028fSHans-Christian Egtvedt if (retval)
2554ede028fSHans-Christian Egtvedt dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
2564ede028fSHans-Christian Egtvedt runtime->rate);
2574ede028fSHans-Christian Egtvedt
2587177395fSSedji Gaouaou /* Initialize and start the PDC */
2597177395fSSedji Gaouaou writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
2607177395fSSedji Gaouaou writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);
261020c5260SAndy Shevchenko writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_TNPR);
2627177395fSSedji Gaouaou writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
2634ede028fSHans-Christian Egtvedt
2644ede028fSHans-Christian Egtvedt return retval;
2654ede028fSHans-Christian Egtvedt }
2664ede028fSHans-Christian Egtvedt
atmel_ac97c_capture_prepare(struct snd_pcm_substream * substream)2674ede028fSHans-Christian Egtvedt static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
2684ede028fSHans-Christian Egtvedt {
2694ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
2704ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
2717177395fSSedji Gaouaou int block_size = frames_to_bytes(runtime, runtime->period_size);
272128ed6a9SHans-Christian Egtvedt unsigned long word = ac97c_readl(chip, ICA);
2734ede028fSHans-Christian Egtvedt int retval;
2744ede028fSHans-Christian Egtvedt
2757177395fSSedji Gaouaou chip->capture_period = 0;
276128ed6a9SHans-Christian Egtvedt word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
277128ed6a9SHans-Christian Egtvedt
2784ede028fSHans-Christian Egtvedt /* assign channels to AC97C channel A */
2794ede028fSHans-Christian Egtvedt switch (runtime->channels) {
2804ede028fSHans-Christian Egtvedt case 1:
2814ede028fSHans-Christian Egtvedt word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
2824ede028fSHans-Christian Egtvedt break;
2834ede028fSHans-Christian Egtvedt case 2:
2844ede028fSHans-Christian Egtvedt word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
2854ede028fSHans-Christian Egtvedt | AC97C_CH_ASSIGN(PCM_RIGHT, A);
2864ede028fSHans-Christian Egtvedt break;
2874ede028fSHans-Christian Egtvedt default:
2884ede028fSHans-Christian Egtvedt /* TODO: support more than two channels */
2894ede028fSHans-Christian Egtvedt return -EINVAL;
2904ede028fSHans-Christian Egtvedt }
2914ede028fSHans-Christian Egtvedt ac97c_writel(chip, ICA, word);
2924ede028fSHans-Christian Egtvedt
2934ede028fSHans-Christian Egtvedt /* configure sample format and size */
294ec2755a9SSedji Gaouaou word = ac97c_readl(chip, CAMR);
295ec2755a9SSedji Gaouaou if (chip->opened <= 1)
2964ede028fSHans-Christian Egtvedt word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
297ec2755a9SSedji Gaouaou else
298ec2755a9SSedji Gaouaou word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
2994ede028fSHans-Christian Egtvedt
3004ede028fSHans-Christian Egtvedt switch (runtime->format) {
3014ede028fSHans-Christian Egtvedt case SNDRV_PCM_FORMAT_S16_LE:
3024ede028fSHans-Christian Egtvedt break;
3034d6cd8f1STakashi Iwai case SNDRV_PCM_FORMAT_S16_BE:
3044ede028fSHans-Christian Egtvedt word &= ~(AC97C_CMR_CEM_LITTLE);
3054ede028fSHans-Christian Egtvedt break;
306128ed6a9SHans-Christian Egtvedt default:
307128ed6a9SHans-Christian Egtvedt word = ac97c_readl(chip, ICA);
308128ed6a9SHans-Christian Egtvedt word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
309128ed6a9SHans-Christian Egtvedt ac97c_writel(chip, ICA, word);
310128ed6a9SHans-Christian Egtvedt return -EINVAL;
3114ede028fSHans-Christian Egtvedt }
3124ede028fSHans-Christian Egtvedt
313df163587SHans-Christian Egtvedt /* Enable overrun interrupt on channel A */
314df163587SHans-Christian Egtvedt word |= AC97C_CSR_OVRUN;
315df163587SHans-Christian Egtvedt
3164ede028fSHans-Christian Egtvedt ac97c_writel(chip, CAMR, word);
3174ede028fSHans-Christian Egtvedt
318df163587SHans-Christian Egtvedt /* Enable channel A event interrupt */
319df163587SHans-Christian Egtvedt word = ac97c_readl(chip, IMR);
320df163587SHans-Christian Egtvedt word |= AC97C_SR_CAEVT;
321df163587SHans-Christian Egtvedt ac97c_writel(chip, IER, word);
322df163587SHans-Christian Egtvedt
3234ede028fSHans-Christian Egtvedt /* set variable rate if needed */
3244ede028fSHans-Christian Egtvedt if (runtime->rate != 48000) {
3254ede028fSHans-Christian Egtvedt word = ac97c_readl(chip, MR);
3264ede028fSHans-Christian Egtvedt word |= AC97C_MR_VRA;
3274ede028fSHans-Christian Egtvedt ac97c_writel(chip, MR, word);
3284ede028fSHans-Christian Egtvedt } else {
3294ede028fSHans-Christian Egtvedt word = ac97c_readl(chip, MR);
3304ede028fSHans-Christian Egtvedt word &= ~(AC97C_MR_VRA);
3314ede028fSHans-Christian Egtvedt ac97c_writel(chip, MR, word);
3324ede028fSHans-Christian Egtvedt }
3334ede028fSHans-Christian Egtvedt
3344ede028fSHans-Christian Egtvedt retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE,
3354ede028fSHans-Christian Egtvedt runtime->rate);
3364ede028fSHans-Christian Egtvedt if (retval)
3374ede028fSHans-Christian Egtvedt dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
3384ede028fSHans-Christian Egtvedt runtime->rate);
3394ede028fSHans-Christian Egtvedt
3407177395fSSedji Gaouaou /* Initialize and start the PDC */
3417177395fSSedji Gaouaou writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);
3427177395fSSedji Gaouaou writel(block_size / 2, chip->regs + ATMEL_PDC_RCR);
343020c5260SAndy Shevchenko writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR);
3447177395fSSedji Gaouaou writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
3454ede028fSHans-Christian Egtvedt
3464ede028fSHans-Christian Egtvedt return retval;
3474ede028fSHans-Christian Egtvedt }
3484ede028fSHans-Christian Egtvedt
3494ede028fSHans-Christian Egtvedt static int
atmel_ac97c_playback_trigger(struct snd_pcm_substream * substream,int cmd)3504ede028fSHans-Christian Egtvedt atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
3514ede028fSHans-Christian Egtvedt {
3524ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
3537177395fSSedji Gaouaou unsigned long camr, ptcr = 0;
3544ede028fSHans-Christian Egtvedt
3554ede028fSHans-Christian Egtvedt camr = ac97c_readl(chip, CAMR);
3564ede028fSHans-Christian Egtvedt
3574ede028fSHans-Christian Egtvedt switch (cmd) {
358c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
359c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_RESUME:
3604ede028fSHans-Christian Egtvedt case SNDRV_PCM_TRIGGER_START:
3617177395fSSedji Gaouaou ptcr = ATMEL_PDC_TXTEN;
362ec2755a9SSedji Gaouaou camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX;
3634ede028fSHans-Christian Egtvedt break;
364c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
365c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_SUSPEND:
3664ede028fSHans-Christian Egtvedt case SNDRV_PCM_TRIGGER_STOP:
3677177395fSSedji Gaouaou ptcr |= ATMEL_PDC_TXTDIS;
3684ede028fSHans-Christian Egtvedt if (chip->opened <= 1)
3694ede028fSHans-Christian Egtvedt camr &= ~AC97C_CMR_CENA;
3704ede028fSHans-Christian Egtvedt break;
3714ede028fSHans-Christian Egtvedt default:
372020c5260SAndy Shevchenko return -EINVAL;
3734ede028fSHans-Christian Egtvedt }
3744ede028fSHans-Christian Egtvedt
3754ede028fSHans-Christian Egtvedt ac97c_writel(chip, CAMR, camr);
3767177395fSSedji Gaouaou writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
377020c5260SAndy Shevchenko return 0;
3784ede028fSHans-Christian Egtvedt }
3794ede028fSHans-Christian Egtvedt
3804ede028fSHans-Christian Egtvedt static int
atmel_ac97c_capture_trigger(struct snd_pcm_substream * substream,int cmd)3814ede028fSHans-Christian Egtvedt atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
3824ede028fSHans-Christian Egtvedt {
3834ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
3847177395fSSedji Gaouaou unsigned long camr, ptcr = 0;
3854ede028fSHans-Christian Egtvedt
3864ede028fSHans-Christian Egtvedt camr = ac97c_readl(chip, CAMR);
3877177395fSSedji Gaouaou ptcr = readl(chip->regs + ATMEL_PDC_PTSR);
3884ede028fSHans-Christian Egtvedt
3894ede028fSHans-Christian Egtvedt switch (cmd) {
390c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
391c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_RESUME:
3924ede028fSHans-Christian Egtvedt case SNDRV_PCM_TRIGGER_START:
3937177395fSSedji Gaouaou ptcr = ATMEL_PDC_RXTEN;
394ec2755a9SSedji Gaouaou camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX;
3954ede028fSHans-Christian Egtvedt break;
396c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
397c0dbbdadSGustavo A. R. Silva case SNDRV_PCM_TRIGGER_SUSPEND:
3984ede028fSHans-Christian Egtvedt case SNDRV_PCM_TRIGGER_STOP:
399020c5260SAndy Shevchenko ptcr |= ATMEL_PDC_RXTDIS;
4004ede028fSHans-Christian Egtvedt if (chip->opened <= 1)
4014ede028fSHans-Christian Egtvedt camr &= ~AC97C_CMR_CENA;
4024ede028fSHans-Christian Egtvedt break;
4034ede028fSHans-Christian Egtvedt default:
404020c5260SAndy Shevchenko return -EINVAL;
4054ede028fSHans-Christian Egtvedt }
4064ede028fSHans-Christian Egtvedt
4074ede028fSHans-Christian Egtvedt ac97c_writel(chip, CAMR, camr);
4087177395fSSedji Gaouaou writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
409020c5260SAndy Shevchenko return 0;
4104ede028fSHans-Christian Egtvedt }
4114ede028fSHans-Christian Egtvedt
4124ede028fSHans-Christian Egtvedt static snd_pcm_uframes_t
atmel_ac97c_playback_pointer(struct snd_pcm_substream * substream)4134ede028fSHans-Christian Egtvedt atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream)
4144ede028fSHans-Christian Egtvedt {
4154ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
4164ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
4174ede028fSHans-Christian Egtvedt snd_pcm_uframes_t frames;
4184ede028fSHans-Christian Egtvedt unsigned long bytes;
4194ede028fSHans-Christian Egtvedt
4207177395fSSedji Gaouaou bytes = readl(chip->regs + ATMEL_PDC_TPR);
4214ede028fSHans-Christian Egtvedt bytes -= runtime->dma_addr;
4224ede028fSHans-Christian Egtvedt
4234ede028fSHans-Christian Egtvedt frames = bytes_to_frames(runtime, bytes);
4244ede028fSHans-Christian Egtvedt if (frames >= runtime->buffer_size)
4254ede028fSHans-Christian Egtvedt frames -= runtime->buffer_size;
4264ede028fSHans-Christian Egtvedt return frames;
4274ede028fSHans-Christian Egtvedt }
4284ede028fSHans-Christian Egtvedt
4294ede028fSHans-Christian Egtvedt static snd_pcm_uframes_t
atmel_ac97c_capture_pointer(struct snd_pcm_substream * substream)4304ede028fSHans-Christian Egtvedt atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream)
4314ede028fSHans-Christian Egtvedt {
4324ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
4334ede028fSHans-Christian Egtvedt struct snd_pcm_runtime *runtime = substream->runtime;
4344ede028fSHans-Christian Egtvedt snd_pcm_uframes_t frames;
4354ede028fSHans-Christian Egtvedt unsigned long bytes;
4364ede028fSHans-Christian Egtvedt
4377177395fSSedji Gaouaou bytes = readl(chip->regs + ATMEL_PDC_RPR);
4384ede028fSHans-Christian Egtvedt bytes -= runtime->dma_addr;
4394ede028fSHans-Christian Egtvedt
4404ede028fSHans-Christian Egtvedt frames = bytes_to_frames(runtime, bytes);
4414ede028fSHans-Christian Egtvedt if (frames >= runtime->buffer_size)
4424ede028fSHans-Christian Egtvedt frames -= runtime->buffer_size;
4434ede028fSHans-Christian Egtvedt return frames;
4444ede028fSHans-Christian Egtvedt }
4454ede028fSHans-Christian Egtvedt
44610863737SArvind Yadav static const struct snd_pcm_ops atmel_ac97_playback_ops = {
4474ede028fSHans-Christian Egtvedt .open = atmel_ac97c_playback_open,
4484ede028fSHans-Christian Egtvedt .close = atmel_ac97c_playback_close,
4494ede028fSHans-Christian Egtvedt .hw_params = atmel_ac97c_playback_hw_params,
4504ede028fSHans-Christian Egtvedt .prepare = atmel_ac97c_playback_prepare,
4514ede028fSHans-Christian Egtvedt .trigger = atmel_ac97c_playback_trigger,
4524ede028fSHans-Christian Egtvedt .pointer = atmel_ac97c_playback_pointer,
4534ede028fSHans-Christian Egtvedt };
4544ede028fSHans-Christian Egtvedt
45510863737SArvind Yadav static const struct snd_pcm_ops atmel_ac97_capture_ops = {
4564ede028fSHans-Christian Egtvedt .open = atmel_ac97c_capture_open,
4574ede028fSHans-Christian Egtvedt .close = atmel_ac97c_capture_close,
4584ede028fSHans-Christian Egtvedt .hw_params = atmel_ac97c_capture_hw_params,
4594ede028fSHans-Christian Egtvedt .prepare = atmel_ac97c_capture_prepare,
4604ede028fSHans-Christian Egtvedt .trigger = atmel_ac97c_capture_trigger,
4614ede028fSHans-Christian Egtvedt .pointer = atmel_ac97c_capture_pointer,
4624ede028fSHans-Christian Egtvedt };
4634ede028fSHans-Christian Egtvedt
atmel_ac97c_interrupt(int irq,void * dev)464df163587SHans-Christian Egtvedt static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev)
465df163587SHans-Christian Egtvedt {
466df163587SHans-Christian Egtvedt struct atmel_ac97c *chip = (struct atmel_ac97c *)dev;
467df163587SHans-Christian Egtvedt irqreturn_t retval = IRQ_NONE;
468df163587SHans-Christian Egtvedt u32 sr = ac97c_readl(chip, SR);
469df163587SHans-Christian Egtvedt u32 casr = ac97c_readl(chip, CASR);
470df163587SHans-Christian Egtvedt u32 cosr = ac97c_readl(chip, COSR);
4717177395fSSedji Gaouaou u32 camr = ac97c_readl(chip, CAMR);
472df163587SHans-Christian Egtvedt
473df163587SHans-Christian Egtvedt if (sr & AC97C_SR_CAEVT) {
4747177395fSSedji Gaouaou struct snd_pcm_runtime *runtime;
4757177395fSSedji Gaouaou int offset, next_period, block_size;
476f5341163SYegor Yefremov dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n",
477a971b42cSPierre-Louis Bossart (casr & AC97C_CSR_OVRUN) ? " OVRUN" : "",
478a971b42cSPierre-Louis Bossart (casr & AC97C_CSR_RXRDY) ? " RXRDY" : "",
479a971b42cSPierre-Louis Bossart (casr & AC97C_CSR_UNRUN) ? " UNRUN" : "",
480a971b42cSPierre-Louis Bossart (casr & AC97C_CSR_TXEMPTY) ? " TXEMPTY" : "",
481a971b42cSPierre-Louis Bossart (casr & AC97C_CSR_TXRDY) ? " TXRDY" : "",
482df163587SHans-Christian Egtvedt !casr ? " NONE" : "");
4837177395fSSedji Gaouaou if ((casr & camr) & AC97C_CSR_ENDTX) {
4847177395fSSedji Gaouaou runtime = chip->playback_substream->runtime;
485020c5260SAndy Shevchenko block_size = frames_to_bytes(runtime, runtime->period_size);
4867177395fSSedji Gaouaou chip->playback_period++;
4877177395fSSedji Gaouaou
4887177395fSSedji Gaouaou if (chip->playback_period == runtime->periods)
4897177395fSSedji Gaouaou chip->playback_period = 0;
4907177395fSSedji Gaouaou next_period = chip->playback_period + 1;
4917177395fSSedji Gaouaou if (next_period == runtime->periods)
4927177395fSSedji Gaouaou next_period = 0;
4937177395fSSedji Gaouaou
4947177395fSSedji Gaouaou offset = block_size * next_period;
4957177395fSSedji Gaouaou
496020c5260SAndy Shevchenko writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_TNPR);
497020c5260SAndy Shevchenko writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
4987177395fSSedji Gaouaou
499020c5260SAndy Shevchenko snd_pcm_period_elapsed(chip->playback_substream);
5007177395fSSedji Gaouaou }
5017177395fSSedji Gaouaou if ((casr & camr) & AC97C_CSR_ENDRX) {
5027177395fSSedji Gaouaou runtime = chip->capture_substream->runtime;
503020c5260SAndy Shevchenko block_size = frames_to_bytes(runtime, runtime->period_size);
5047177395fSSedji Gaouaou chip->capture_period++;
5057177395fSSedji Gaouaou
5067177395fSSedji Gaouaou if (chip->capture_period == runtime->periods)
5077177395fSSedji Gaouaou chip->capture_period = 0;
5087177395fSSedji Gaouaou next_period = chip->capture_period + 1;
5097177395fSSedji Gaouaou if (next_period == runtime->periods)
5107177395fSSedji Gaouaou next_period = 0;
5117177395fSSedji Gaouaou
5127177395fSSedji Gaouaou offset = block_size * next_period;
5137177395fSSedji Gaouaou
514020c5260SAndy Shevchenko writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR);
515020c5260SAndy Shevchenko writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
5167177395fSSedji Gaouaou snd_pcm_period_elapsed(chip->capture_substream);
5177177395fSSedji Gaouaou }
518df163587SHans-Christian Egtvedt retval = IRQ_HANDLED;
519df163587SHans-Christian Egtvedt }
520df163587SHans-Christian Egtvedt
521df163587SHans-Christian Egtvedt if (sr & AC97C_SR_COEVT) {
522df163587SHans-Christian Egtvedt dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n",
523a971b42cSPierre-Louis Bossart (cosr & AC97C_CSR_OVRUN) ? " OVRUN" : "",
524a971b42cSPierre-Louis Bossart (cosr & AC97C_CSR_RXRDY) ? " RXRDY" : "",
525a971b42cSPierre-Louis Bossart (cosr & AC97C_CSR_TXEMPTY) ? " TXEMPTY" : "",
526a971b42cSPierre-Louis Bossart (cosr & AC97C_CSR_TXRDY) ? " TXRDY" : "",
527df163587SHans-Christian Egtvedt !cosr ? " NONE" : "");
528df163587SHans-Christian Egtvedt retval = IRQ_HANDLED;
529df163587SHans-Christian Egtvedt }
530df163587SHans-Christian Egtvedt
531df163587SHans-Christian Egtvedt if (retval == IRQ_NONE) {
532df163587SHans-Christian Egtvedt dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x "
533df163587SHans-Christian Egtvedt "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr);
534df163587SHans-Christian Egtvedt }
535df163587SHans-Christian Egtvedt
536df163587SHans-Christian Egtvedt return retval;
537df163587SHans-Christian Egtvedt }
538df163587SHans-Christian Egtvedt
5393ca8590bSArvind Yadav static const struct ac97_pcm at91_ac97_pcm_defs[] = {
5407177395fSSedji Gaouaou /* Playback */
5417177395fSSedji Gaouaou {
5427177395fSSedji Gaouaou .exclusive = 1,
5437177395fSSedji Gaouaou .r = { {
5447177395fSSedji Gaouaou .slots = ((1 << AC97_SLOT_PCM_LEFT)
5457177395fSSedji Gaouaou | (1 << AC97_SLOT_PCM_RIGHT)),
5467177395fSSedji Gaouaou } },
5477177395fSSedji Gaouaou },
5487177395fSSedji Gaouaou /* PCM in */
5497177395fSSedji Gaouaou {
5507177395fSSedji Gaouaou .stream = 1,
5517177395fSSedji Gaouaou .exclusive = 1,
5527177395fSSedji Gaouaou .r = { {
5537177395fSSedji Gaouaou .slots = ((1 << AC97_SLOT_PCM_LEFT)
5547177395fSSedji Gaouaou | (1 << AC97_SLOT_PCM_RIGHT)),
5557177395fSSedji Gaouaou } }
5567177395fSSedji Gaouaou },
5577177395fSSedji Gaouaou /* Mic in */
5587177395fSSedji Gaouaou {
5597177395fSSedji Gaouaou .stream = 1,
5607177395fSSedji Gaouaou .exclusive = 1,
5617177395fSSedji Gaouaou .r = { {
5627177395fSSedji Gaouaou .slots = (1<<AC97_SLOT_MIC),
5637177395fSSedji Gaouaou } }
5647177395fSSedji Gaouaou },
5657177395fSSedji Gaouaou };
5667177395fSSedji Gaouaou
atmel_ac97c_pcm_new(struct atmel_ac97c * chip)56761dc674cSBill Pemberton static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
5684ede028fSHans-Christian Egtvedt {
5694ede028fSHans-Christian Egtvedt struct snd_pcm *pcm;
5704ede028fSHans-Christian Egtvedt struct snd_pcm_hardware hw = atmel_ac97c_hw;
571020c5260SAndy Shevchenko int retval;
5724ede028fSHans-Christian Egtvedt
573020c5260SAndy Shevchenko retval = snd_ac97_pcm_assign(chip->ac97_bus,
5747177395fSSedji Gaouaou ARRAY_SIZE(at91_ac97_pcm_defs),
5757177395fSSedji Gaouaou at91_ac97_pcm_defs);
5764ede028fSHans-Christian Egtvedt if (retval)
5774ede028fSHans-Christian Egtvedt return retval;
5784ede028fSHans-Christian Egtvedt
579020c5260SAndy Shevchenko retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
580020c5260SAndy Shevchenko if (retval)
581020c5260SAndy Shevchenko return retval;
582020c5260SAndy Shevchenko
583020c5260SAndy Shevchenko snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &atmel_ac97_capture_ops);
584020c5260SAndy Shevchenko snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &atmel_ac97_playback_ops);
5854ede028fSHans-Christian Egtvedt
58637b9b9a5STakashi Iwai snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
5874ede028fSHans-Christian Egtvedt &chip->pdev->dev, hw.periods_min * hw.period_bytes_min,
5884ede028fSHans-Christian Egtvedt hw.buffer_bytes_max);
5894ede028fSHans-Christian Egtvedt
5904ede028fSHans-Christian Egtvedt pcm->private_data = chip;
5914ede028fSHans-Christian Egtvedt pcm->info_flags = 0;
5924ede028fSHans-Christian Egtvedt strcpy(pcm->name, chip->card->shortname);
5934ede028fSHans-Christian Egtvedt chip->pcm = pcm;
5944ede028fSHans-Christian Egtvedt
5954ede028fSHans-Christian Egtvedt return 0;
5964ede028fSHans-Christian Egtvedt }
5974ede028fSHans-Christian Egtvedt
atmel_ac97c_mixer_new(struct atmel_ac97c * chip)5984ede028fSHans-Christian Egtvedt static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip)
5994ede028fSHans-Christian Egtvedt {
6004ede028fSHans-Christian Egtvedt struct snd_ac97_template template;
6014ede028fSHans-Christian Egtvedt memset(&template, 0, sizeof(template));
6024ede028fSHans-Christian Egtvedt template.private_data = chip;
6034ede028fSHans-Christian Egtvedt return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97);
6044ede028fSHans-Christian Egtvedt }
6054ede028fSHans-Christian Egtvedt
atmel_ac97c_write(struct snd_ac97 * ac97,unsigned short reg,unsigned short val)6064ede028fSHans-Christian Egtvedt static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg,
6074ede028fSHans-Christian Egtvedt unsigned short val)
6084ede028fSHans-Christian Egtvedt {
6094ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = get_chip(ac97);
6104ede028fSHans-Christian Egtvedt unsigned long word;
6114ede028fSHans-Christian Egtvedt int timeout = 40;
6124ede028fSHans-Christian Egtvedt
6134ede028fSHans-Christian Egtvedt word = (reg & 0x7f) << 16 | val;
6144ede028fSHans-Christian Egtvedt
6154ede028fSHans-Christian Egtvedt do {
6164ede028fSHans-Christian Egtvedt if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) {
6174ede028fSHans-Christian Egtvedt ac97c_writel(chip, COTHR, word);
6184ede028fSHans-Christian Egtvedt return;
6194ede028fSHans-Christian Egtvedt }
6204ede028fSHans-Christian Egtvedt udelay(1);
6214ede028fSHans-Christian Egtvedt } while (--timeout);
6224ede028fSHans-Christian Egtvedt
6234ede028fSHans-Christian Egtvedt dev_dbg(&chip->pdev->dev, "codec write timeout\n");
6244ede028fSHans-Christian Egtvedt }
6254ede028fSHans-Christian Egtvedt
atmel_ac97c_read(struct snd_ac97 * ac97,unsigned short reg)6264ede028fSHans-Christian Egtvedt static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97,
6274ede028fSHans-Christian Egtvedt unsigned short reg)
6284ede028fSHans-Christian Egtvedt {
6294ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = get_chip(ac97);
6304ede028fSHans-Christian Egtvedt unsigned long word;
6314ede028fSHans-Christian Egtvedt int timeout = 40;
6324ede028fSHans-Christian Egtvedt int write = 10;
6334ede028fSHans-Christian Egtvedt
6344ede028fSHans-Christian Egtvedt word = (0x80 | (reg & 0x7f)) << 16;
6354ede028fSHans-Christian Egtvedt
6364ede028fSHans-Christian Egtvedt if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0)
6374ede028fSHans-Christian Egtvedt ac97c_readl(chip, CORHR);
6384ede028fSHans-Christian Egtvedt
6394ede028fSHans-Christian Egtvedt retry_write:
6404ede028fSHans-Christian Egtvedt timeout = 40;
6414ede028fSHans-Christian Egtvedt
6424ede028fSHans-Christian Egtvedt do {
6434ede028fSHans-Christian Egtvedt if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) {
6444ede028fSHans-Christian Egtvedt ac97c_writel(chip, COTHR, word);
6454ede028fSHans-Christian Egtvedt goto read_reg;
6464ede028fSHans-Christian Egtvedt }
6474ede028fSHans-Christian Egtvedt udelay(10);
6484ede028fSHans-Christian Egtvedt } while (--timeout);
6494ede028fSHans-Christian Egtvedt
6504ede028fSHans-Christian Egtvedt if (!--write)
6514ede028fSHans-Christian Egtvedt goto timed_out;
6524ede028fSHans-Christian Egtvedt goto retry_write;
6534ede028fSHans-Christian Egtvedt
6544ede028fSHans-Christian Egtvedt read_reg:
6554ede028fSHans-Christian Egtvedt do {
6564ede028fSHans-Christian Egtvedt if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) {
6574ede028fSHans-Christian Egtvedt unsigned short val = ac97c_readl(chip, CORHR);
6584ede028fSHans-Christian Egtvedt return val;
6594ede028fSHans-Christian Egtvedt }
6604ede028fSHans-Christian Egtvedt udelay(10);
6614ede028fSHans-Christian Egtvedt } while (--timeout);
6624ede028fSHans-Christian Egtvedt
6634ede028fSHans-Christian Egtvedt if (!--write)
6644ede028fSHans-Christian Egtvedt goto timed_out;
6654ede028fSHans-Christian Egtvedt goto retry_write;
6664ede028fSHans-Christian Egtvedt
6674ede028fSHans-Christian Egtvedt timed_out:
6684ede028fSHans-Christian Egtvedt dev_dbg(&chip->pdev->dev, "codec read timeout\n");
6694ede028fSHans-Christian Egtvedt return 0xffff;
6704ede028fSHans-Christian Egtvedt }
6714ede028fSHans-Christian Egtvedt
atmel_ac97c_reset(struct atmel_ac97c * chip)6724ede028fSHans-Christian Egtvedt static void atmel_ac97c_reset(struct atmel_ac97c *chip)
6734ede028fSHans-Christian Egtvedt {
67481baf3a7SHans-Christian Egtvedt ac97c_writel(chip, MR, 0);
67581baf3a7SHans-Christian Egtvedt ac97c_writel(chip, MR, AC97C_MR_ENA);
67681baf3a7SHans-Christian Egtvedt ac97c_writel(chip, CAMR, 0);
67781baf3a7SHans-Christian Egtvedt ac97c_writel(chip, COMR, 0);
6784ede028fSHans-Christian Egtvedt
6795f10e849SAndy Shevchenko if (!IS_ERR(chip->reset_pin)) {
6805f10e849SAndy Shevchenko gpiod_set_value(chip->reset_pin, 0);
6814ede028fSHans-Christian Egtvedt /* AC97 v2.2 specifications says minimum 1 us. */
68281baf3a7SHans-Christian Egtvedt udelay(2);
6835f10e849SAndy Shevchenko gpiod_set_value(chip->reset_pin, 1);
6848015e3deSBo Shen } else {
6858015e3deSBo Shen ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA);
6868015e3deSBo Shen udelay(2);
6878015e3deSBo Shen ac97c_writel(chip, MR, AC97C_MR_ENA);
6884ede028fSHans-Christian Egtvedt }
6894ede028fSHans-Christian Egtvedt }
6904ede028fSHans-Christian Egtvedt
691b2d8957fSAlexander Stein static const struct of_device_id atmel_ac97c_dt_ids[] = {
692b2d8957fSAlexander Stein { .compatible = "atmel,at91sam9263-ac97c", },
693b2d8957fSAlexander Stein { }
694b2d8957fSAlexander Stein };
695b2d8957fSAlexander Stein MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids);
696b2d8957fSAlexander Stein
atmel_ac97c_probe(struct platform_device * pdev)69761dc674cSBill Pemberton static int atmel_ac97c_probe(struct platform_device *pdev)
6984ede028fSHans-Christian Egtvedt {
6995f10e849SAndy Shevchenko struct device *dev = &pdev->dev;
7004ede028fSHans-Christian Egtvedt struct snd_card *card;
7014ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip;
7024ede028fSHans-Christian Egtvedt struct resource *regs;
7034ede028fSHans-Christian Egtvedt struct clk *pclk;
7043a3fac8bSTakashi Iwai static const struct snd_ac97_bus_ops ops = {
7054ede028fSHans-Christian Egtvedt .write = atmel_ac97c_write,
7064ede028fSHans-Christian Egtvedt .read = atmel_ac97c_read,
7074ede028fSHans-Christian Egtvedt };
7084ede028fSHans-Christian Egtvedt int retval;
709df163587SHans-Christian Egtvedt int irq;
7104ede028fSHans-Christian Egtvedt
7114ede028fSHans-Christian Egtvedt regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
7124ede028fSHans-Christian Egtvedt if (!regs) {
7134ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "no memory resource\n");
7144ede028fSHans-Christian Egtvedt return -ENXIO;
7154ede028fSHans-Christian Egtvedt }
7164ede028fSHans-Christian Egtvedt
717df163587SHans-Christian Egtvedt irq = platform_get_irq(pdev, 0);
718df163587SHans-Christian Egtvedt if (irq < 0) {
71977201135SGustavo A. R. Silva dev_dbg(&pdev->dev, "could not get irq: %d\n", irq);
72077201135SGustavo A. R. Silva return irq;
721df163587SHans-Christian Egtvedt }
722df163587SHans-Christian Egtvedt
7237177395fSSedji Gaouaou pclk = clk_get(&pdev->dev, "ac97_clk");
7244ede028fSHans-Christian Egtvedt if (IS_ERR(pclk)) {
7254ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "no peripheral clock\n");
7264ede028fSHans-Christian Egtvedt return PTR_ERR(pclk);
7274ede028fSHans-Christian Egtvedt }
728260ea95cSArvind Yadav retval = clk_prepare_enable(pclk);
729260ea95cSArvind Yadav if (retval)
7300515760fSChristophe Jaillet goto err_prepare_enable;
7314ede028fSHans-Christian Egtvedt
732a4f2473dSTakashi Iwai retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1,
733a4f2473dSTakashi Iwai SNDRV_DEFAULT_STR1, THIS_MODULE,
734a4f2473dSTakashi Iwai sizeof(struct atmel_ac97c), &card);
7354ede028fSHans-Christian Egtvedt if (retval) {
7364ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not create sound card device\n");
7374ede028fSHans-Christian Egtvedt goto err_snd_card_new;
7384ede028fSHans-Christian Egtvedt }
7394ede028fSHans-Christian Egtvedt
7404ede028fSHans-Christian Egtvedt chip = get_chip(card);
7414ede028fSHans-Christian Egtvedt
742df163587SHans-Christian Egtvedt retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip);
743df163587SHans-Christian Egtvedt if (retval) {
744df163587SHans-Christian Egtvedt dev_dbg(&pdev->dev, "unable to request irq %d\n", irq);
745df163587SHans-Christian Egtvedt goto err_request_irq;
746df163587SHans-Christian Egtvedt }
747df163587SHans-Christian Egtvedt chip->irq = irq;
748df163587SHans-Christian Egtvedt
7494ede028fSHans-Christian Egtvedt spin_lock_init(&chip->lock);
7504ede028fSHans-Christian Egtvedt
7514ede028fSHans-Christian Egtvedt strcpy(card->driver, "Atmel AC97C");
7524ede028fSHans-Christian Egtvedt strcpy(card->shortname, "Atmel AC97C");
7534ede028fSHans-Christian Egtvedt sprintf(card->longname, "Atmel AC97 controller");
7544ede028fSHans-Christian Egtvedt
7554ede028fSHans-Christian Egtvedt chip->card = card;
7564ede028fSHans-Christian Egtvedt chip->pclk = pclk;
7574ede028fSHans-Christian Egtvedt chip->pdev = pdev;
75828f65c11SJoe Perches chip->regs = ioremap(regs->start, resource_size(regs));
7594ede028fSHans-Christian Egtvedt
7604ede028fSHans-Christian Egtvedt if (!chip->regs) {
7614ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not remap register memory\n");
7620c23e46eSJulia Lawall retval = -ENOMEM;
7634ede028fSHans-Christian Egtvedt goto err_ioremap;
7644ede028fSHans-Christian Egtvedt }
7654ede028fSHans-Christian Egtvedt
7665f10e849SAndy Shevchenko chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH);
7675f10e849SAndy Shevchenko if (IS_ERR(chip->reset_pin))
7685f10e849SAndy Shevchenko dev_dbg(dev, "reset pin not available\n");
7694ede028fSHans-Christian Egtvedt
77081baf3a7SHans-Christian Egtvedt atmel_ac97c_reset(chip);
77181baf3a7SHans-Christian Egtvedt
772df163587SHans-Christian Egtvedt /* Enable overrun interrupt from codec channel */
773df163587SHans-Christian Egtvedt ac97c_writel(chip, COMR, AC97C_CSR_OVRUN);
774df163587SHans-Christian Egtvedt ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT);
775df163587SHans-Christian Egtvedt
7764ede028fSHans-Christian Egtvedt retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
7774ede028fSHans-Christian Egtvedt if (retval) {
7784ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not register on ac97 bus\n");
7794ede028fSHans-Christian Egtvedt goto err_ac97_bus;
7804ede028fSHans-Christian Egtvedt }
7814ede028fSHans-Christian Egtvedt
7824ede028fSHans-Christian Egtvedt retval = atmel_ac97c_mixer_new(chip);
7834ede028fSHans-Christian Egtvedt if (retval) {
7844ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not register ac97 mixer\n");
7854ede028fSHans-Christian Egtvedt goto err_ac97_bus;
7864ede028fSHans-Christian Egtvedt }
7874ede028fSHans-Christian Egtvedt
7884ede028fSHans-Christian Egtvedt retval = atmel_ac97c_pcm_new(chip);
7894ede028fSHans-Christian Egtvedt if (retval) {
7904ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not register ac97 pcm device\n");
791020c5260SAndy Shevchenko goto err_ac97_bus;
7924ede028fSHans-Christian Egtvedt }
7934ede028fSHans-Christian Egtvedt
7944ede028fSHans-Christian Egtvedt retval = snd_card_register(card);
7954ede028fSHans-Christian Egtvedt if (retval) {
7964ede028fSHans-Christian Egtvedt dev_dbg(&pdev->dev, "could not register sound card\n");
797020c5260SAndy Shevchenko goto err_ac97_bus;
7984ede028fSHans-Christian Egtvedt }
7994ede028fSHans-Christian Egtvedt
8004ede028fSHans-Christian Egtvedt platform_set_drvdata(pdev, card);
8014ede028fSHans-Christian Egtvedt
8027177395fSSedji Gaouaou dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n",
8037177395fSSedji Gaouaou chip->regs, irq);
8044ede028fSHans-Christian Egtvedt
8054ede028fSHans-Christian Egtvedt return 0;
8064ede028fSHans-Christian Egtvedt
8074ede028fSHans-Christian Egtvedt err_ac97_bus:
8084ede028fSHans-Christian Egtvedt iounmap(chip->regs);
8094ede028fSHans-Christian Egtvedt err_ioremap:
810df163587SHans-Christian Egtvedt free_irq(irq, chip);
811df163587SHans-Christian Egtvedt err_request_irq:
8124ede028fSHans-Christian Egtvedt snd_card_free(card);
8134ede028fSHans-Christian Egtvedt err_snd_card_new:
8141132015bSAlexander Stein clk_disable_unprepare(pclk);
8150515760fSChristophe Jaillet err_prepare_enable:
8164ede028fSHans-Christian Egtvedt clk_put(pclk);
8174ede028fSHans-Christian Egtvedt return retval;
8184ede028fSHans-Christian Egtvedt }
8194ede028fSHans-Christian Egtvedt
820d34e4e00STakashi Iwai #ifdef CONFIG_PM_SLEEP
atmel_ac97c_suspend(struct device * pdev)821284e7ca7STakashi Iwai static int atmel_ac97c_suspend(struct device *pdev)
8224ede028fSHans-Christian Egtvedt {
823284e7ca7STakashi Iwai struct snd_card *card = dev_get_drvdata(pdev);
8244ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = card->private_data;
8254ede028fSHans-Christian Egtvedt
8261132015bSAlexander Stein clk_disable_unprepare(chip->pclk);
8274ede028fSHans-Christian Egtvedt return 0;
8284ede028fSHans-Christian Egtvedt }
8294ede028fSHans-Christian Egtvedt
atmel_ac97c_resume(struct device * pdev)830284e7ca7STakashi Iwai static int atmel_ac97c_resume(struct device *pdev)
8314ede028fSHans-Christian Egtvedt {
832284e7ca7STakashi Iwai struct snd_card *card = dev_get_drvdata(pdev);
8334ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = card->private_data;
834260ea95cSArvind Yadav int ret = clk_prepare_enable(chip->pclk);
8354ede028fSHans-Christian Egtvedt
836260ea95cSArvind Yadav return ret;
8374ede028fSHans-Christian Egtvedt }
838284e7ca7STakashi Iwai
839284e7ca7STakashi Iwai static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume);
840284e7ca7STakashi Iwai #define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm
8414ede028fSHans-Christian Egtvedt #else
842284e7ca7STakashi Iwai #define ATMEL_AC97C_PM_OPS NULL
8434ede028fSHans-Christian Egtvedt #endif
8444ede028fSHans-Christian Egtvedt
atmel_ac97c_remove(struct platform_device * pdev)84545cc35e8SUwe Kleine-König static void atmel_ac97c_remove(struct platform_device *pdev)
8464ede028fSHans-Christian Egtvedt {
8474ede028fSHans-Christian Egtvedt struct snd_card *card = platform_get_drvdata(pdev);
8484ede028fSHans-Christian Egtvedt struct atmel_ac97c *chip = get_chip(card);
8494ede028fSHans-Christian Egtvedt
850bd74a184SHans-Christian Egtvedt ac97c_writel(chip, CAMR, 0);
851bd74a184SHans-Christian Egtvedt ac97c_writel(chip, COMR, 0);
852bd74a184SHans-Christian Egtvedt ac97c_writel(chip, MR, 0);
853bd74a184SHans-Christian Egtvedt
8541132015bSAlexander Stein clk_disable_unprepare(chip->pclk);
8554ede028fSHans-Christian Egtvedt clk_put(chip->pclk);
8564ede028fSHans-Christian Egtvedt iounmap(chip->regs);
857df163587SHans-Christian Egtvedt free_irq(chip->irq, chip);
8584ede028fSHans-Christian Egtvedt
8594ede028fSHans-Christian Egtvedt snd_card_free(card);
8604ede028fSHans-Christian Egtvedt }
8614ede028fSHans-Christian Egtvedt
8624ede028fSHans-Christian Egtvedt static struct platform_driver atmel_ac97c_driver = {
8634b973ee0SAlexander Stein .probe = atmel_ac97c_probe,
86445cc35e8SUwe Kleine-König .remove_new = atmel_ac97c_remove,
8654ede028fSHans-Christian Egtvedt .driver = {
8664ede028fSHans-Christian Egtvedt .name = "atmel_ac97c",
867284e7ca7STakashi Iwai .pm = ATMEL_AC97C_PM_OPS,
8685f10e849SAndy Shevchenko .of_match_table = atmel_ac97c_dt_ids,
8694ede028fSHans-Christian Egtvedt },
8704ede028fSHans-Christian Egtvedt };
8714b973ee0SAlexander Stein module_platform_driver(atmel_ac97c_driver);
8724ede028fSHans-Christian Egtvedt
8734ede028fSHans-Christian Egtvedt MODULE_LICENSE("GPL");
8744ede028fSHans-Christian Egtvedt MODULE_DESCRIPTION("Driver for Atmel AC97 controller");
8750cfae7c9SHans-Christian Egtvedt MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
876