* [PATCH v2 1/2] ALSA: atmel: Remove AVR32 bits from the driver
2017-05-09 16:18 [PATCH v2 0/2] ALSA, dmaengine: dw: Remove AVR32 bits in drivers Andy Shevchenko
@ 2017-05-09 16:18 ` Andy Shevchenko
2017-05-09 16:18 ` [PATCH v2 2/2] dmaengine: dw: " Andy Shevchenko
1 sibling, 0 replies; 11+ messages in thread
From: Andy Shevchenko @ 2017-05-09 16:18 UTC (permalink / raw)
To: Hans-Christian Noren Egtvedt, linux-kernel, Haavard Skinnemoen,
Nicolas Ferre, Boris Brezillon, Mark Brown, Liam Girdwood,
alsa-devel, Vinod Koul, dmaengine, Eugeniy Paltsev
Cc: Andy Shevchenko
AVR32 is gone. Now it's time to clean up the driver by removing
leftovers that was used by AVR32 related code.
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
sound/atmel/Kconfig | 13 +-
sound/atmel/Makefile | 2 -
sound/atmel/abdac.c | 610 ---------------------------------------------------
sound/atmel/ac97c.c | 447 ++++++-------------------------------
4 files changed, 74 insertions(+), 998 deletions(-)
delete mode 100644 sound/atmel/abdac.c
diff --git a/sound/atmel/Kconfig b/sound/atmel/Kconfig
index 94de43a096f1..d789cbcb9106 100644
--- a/sound/atmel/Kconfig
+++ b/sound/atmel/Kconfig
@@ -1,18 +1,11 @@
-menu "Atmel devices (AVR32 and AT91)"
- depends on AVR32 || ARCH_AT91
-
-config SND_ATMEL_ABDAC
- tristate "Atmel Audio Bitstream DAC (ABDAC) driver"
- select SND_PCM
- depends on DW_DMAC && AVR32
- help
- ALSA sound driver for the Atmel Audio Bitstream DAC (ABDAC).
+menu "Atmel devices (AT91)"
+ depends on ARCH_AT91
config SND_ATMEL_AC97C
tristate "Atmel AC97 Controller (AC97C) driver"
select SND_PCM
select SND_AC97_CODEC
- depends on (DW_DMAC && AVR32) || ARCH_AT91
+ depends on ARCH_AT91
help
ALSA sound driver for the Atmel AC97 controller.
diff --git a/sound/atmel/Makefile b/sound/atmel/Makefile
index 219dcfac6086..d4009d1430ed 100644
--- a/sound/atmel/Makefile
+++ b/sound/atmel/Makefile
@@ -1,5 +1,3 @@
-snd-atmel-abdac-objs := abdac.o
snd-atmel-ac97c-objs := ac97c.o
-obj-$(CONFIG_SND_ATMEL_ABDAC) += snd-atmel-abdac.o
obj-$(CONFIG_SND_ATMEL_AC97C) += snd-atmel-ac97c.o
diff --git a/sound/atmel/abdac.c b/sound/atmel/abdac.c
deleted file mode 100644
index 558618802000..000000000000
--- a/sound/atmel/abdac.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- * Driver for the Atmel on-chip Audio Bitstream DAC (ABDAC)
- *
- * Copyright (C) 2006-2009 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/bitmap.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/io.h>
-
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/atmel-abdac.h>
-
-#include <linux/platform_data/dma-dw.h>
-#include <linux/dma/dw.h>
-
-/* DAC register offsets */
-#define DAC_DATA 0x0000
-#define DAC_CTRL 0x0008
-#define DAC_INT_MASK 0x000c
-#define DAC_INT_EN 0x0010
-#define DAC_INT_DIS 0x0014
-#define DAC_INT_CLR 0x0018
-#define DAC_INT_STATUS 0x001c
-
-/* Bitfields in CTRL */
-#define DAC_SWAP_OFFSET 30
-#define DAC_SWAP_SIZE 1
-#define DAC_EN_OFFSET 31
-#define DAC_EN_SIZE 1
-
-/* Bitfields in INT_MASK/INT_EN/INT_DIS/INT_STATUS/INT_CLR */
-#define DAC_UNDERRUN_OFFSET 28
-#define DAC_UNDERRUN_SIZE 1
-#define DAC_TX_READY_OFFSET 29
-#define DAC_TX_READY_SIZE 1
-
-/* Bit manipulation macros */
-#define DAC_BIT(name) \
- (1 << DAC_##name##_OFFSET)
-#define DAC_BF(name, value) \
- (((value) & ((1 << DAC_##name##_SIZE) - 1)) \
- << DAC_##name##_OFFSET)
-#define DAC_BFEXT(name, value) \
- (((value) >> DAC_##name##_OFFSET) \
- & ((1 << DAC_##name##_SIZE) - 1))
-#define DAC_BFINS(name, value, old) \
- (((old) & ~(((1 << DAC_##name##_SIZE) - 1) \
- << DAC_##name##_OFFSET)) \
- | DAC_BF(name, value))
-
-/* Register access macros */
-#define dac_readl(port, reg) \
- __raw_readl((port)->regs + DAC_##reg)
-#define dac_writel(port, reg, value) \
- __raw_writel((value), (port)->regs + DAC_##reg)
-
-/*
- * ABDAC supports a maximum of 6 different rates from a generic clock. The
- * generic clock has a power of two divider, which gives 6 steps from 192 kHz
- * to 5112 Hz.
- */
-#define MAX_NUM_RATES 6
-/* ALSA seems to use rates between 192000 Hz and 5112 Hz. */
-#define RATE_MAX 192000
-#define RATE_MIN 5112
-
-enum {
- DMA_READY = 0,
-};
-
-struct atmel_abdac_dma {
- struct dma_chan *chan;
- struct dw_cyclic_desc *cdesc;
-};
-
-struct atmel_abdac {
- struct clk *pclk;
- struct clk *sample_clk;
- struct platform_device *pdev;
- struct atmel_abdac_dma dma;
-
- struct snd_pcm_hw_constraint_list constraints_rates;
- struct snd_pcm_substream *substream;
- struct snd_card *card;
- struct snd_pcm *pcm;
-
- void __iomem *regs;
- unsigned long flags;
- unsigned int rates[MAX_NUM_RATES];
- unsigned int rates_num;
- int irq;
-};
-
-#define get_dac(card) ((struct atmel_abdac *)(card)->private_data)
-
-/* This function is called by the DMA driver. */
-static void atmel_abdac_dma_period_done(void *arg)
-{
- struct atmel_abdac *dac = arg;
- snd_pcm_period_elapsed(dac->substream);
-}
-
-static int atmel_abdac_prepare_dma(struct atmel_abdac *dac,
- struct snd_pcm_substream *substream,
- enum dma_data_direction direction)
-{
- struct dma_chan *chan = dac->dma.chan;
- struct dw_cyclic_desc *cdesc;
- struct snd_pcm_runtime *runtime = substream->runtime;
- unsigned long buffer_len, period_len;
-
- /*
- * We don't do DMA on "complex" transfers, i.e. with
- * non-halfword-aligned buffers or lengths.
- */
- if (runtime->dma_addr & 1 || runtime->buffer_size & 1) {
- dev_dbg(&dac->pdev->dev, "too complex transfer\n");
- return -EINVAL;
- }
-
- buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
- period_len = frames_to_bytes(runtime, runtime->period_size);
-
- cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len,
- period_len, DMA_MEM_TO_DEV);
- if (IS_ERR(cdesc)) {
- dev_dbg(&dac->pdev->dev, "could not prepare cyclic DMA\n");
- return PTR_ERR(cdesc);
- }
-
- cdesc->period_callback = atmel_abdac_dma_period_done;
- cdesc->period_callback_param = dac;
-
- dac->dma.cdesc = cdesc;
-
- set_bit(DMA_READY, &dac->flags);
-
- return 0;
-}
-
-static struct snd_pcm_hardware atmel_abdac_hw = {
- .info = (SNDRV_PCM_INFO_MMAP
- | SNDRV_PCM_INFO_MMAP_VALID
- | SNDRV_PCM_INFO_INTERLEAVED
- | SNDRV_PCM_INFO_BLOCK_TRANSFER
- | SNDRV_PCM_INFO_RESUME
- | SNDRV_PCM_INFO_PAUSE),
- .formats = (SNDRV_PCM_FMTBIT_S16_BE),
- .rates = (SNDRV_PCM_RATE_KNOT),
- .rate_min = RATE_MIN,
- .rate_max = RATE_MAX,
- .channels_min = 2,
- .channels_max = 2,
- .buffer_bytes_max = 64 * 4096,
- .period_bytes_min = 4096,
- .period_bytes_max = 4096,
- .periods_min = 6,
- .periods_max = 64,
-};
-
-static int atmel_abdac_open(struct snd_pcm_substream *substream)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
-
- dac->substream = substream;
- atmel_abdac_hw.rate_max = dac->rates[dac->rates_num - 1];
- atmel_abdac_hw.rate_min = dac->rates[0];
- substream->runtime->hw = atmel_abdac_hw;
-
- return snd_pcm_hw_constraint_list(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE, &dac->constraints_rates);
-}
-
-static int atmel_abdac_close(struct snd_pcm_substream *substream)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- dac->substream = NULL;
- return 0;
-}
-
-static int atmel_abdac_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- int retval;
-
- retval = snd_pcm_lib_malloc_pages(substream,
- params_buffer_bytes(hw_params));
- if (retval < 0)
- return retval;
- /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
- if (test_and_clear_bit(DMA_READY, &dac->flags))
- dw_dma_cyclic_free(dac->dma.chan);
-
- return retval;
-}
-
-static int atmel_abdac_hw_free(struct snd_pcm_substream *substream)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- if (test_and_clear_bit(DMA_READY, &dac->flags))
- dw_dma_cyclic_free(dac->dma.chan);
- return snd_pcm_lib_free_pages(substream);
-}
-
-static int atmel_abdac_prepare(struct snd_pcm_substream *substream)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- int retval;
-
- retval = clk_set_rate(dac->sample_clk, 256 * substream->runtime->rate);
- if (retval)
- return retval;
-
- if (!test_bit(DMA_READY, &dac->flags))
- retval = atmel_abdac_prepare_dma(dac, substream, DMA_TO_DEVICE);
-
- return retval;
-}
-
-static int atmel_abdac_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- int retval = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
- case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
- case SNDRV_PCM_TRIGGER_START:
- clk_prepare_enable(dac->sample_clk);
- retval = dw_dma_cyclic_start(dac->dma.chan);
- if (retval)
- goto out;
- dac_writel(dac, CTRL, DAC_BIT(EN));
- break;
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
- case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
- case SNDRV_PCM_TRIGGER_STOP:
- dw_dma_cyclic_stop(dac->dma.chan);
- dac_writel(dac, DATA, 0);
- dac_writel(dac, CTRL, 0);
- clk_disable_unprepare(dac->sample_clk);
- break;
- default:
- retval = -EINVAL;
- break;
- }
-out:
- return retval;
-}
-
-static snd_pcm_uframes_t
-atmel_abdac_pointer(struct snd_pcm_substream *substream)
-{
- struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
- snd_pcm_uframes_t frames;
- unsigned long bytes;
-
- bytes = dw_dma_get_src_addr(dac->dma.chan);
- bytes -= runtime->dma_addr;
-
- frames = bytes_to_frames(runtime, bytes);
- if (frames >= runtime->buffer_size)
- frames -= runtime->buffer_size;
-
- return frames;
-}
-
-static irqreturn_t abdac_interrupt(int irq, void *dev_id)
-{
- struct atmel_abdac *dac = dev_id;
- u32 status;
-
- status = dac_readl(dac, INT_STATUS);
- if (status & DAC_BIT(UNDERRUN)) {
- dev_err(&dac->pdev->dev, "underrun detected\n");
- dac_writel(dac, INT_CLR, DAC_BIT(UNDERRUN));
- } else {
- dev_err(&dac->pdev->dev, "spurious interrupt (status=0x%x)\n",
- status);
- dac_writel(dac, INT_CLR, status);
- }
-
- return IRQ_HANDLED;
-}
-
-static struct snd_pcm_ops atmel_abdac_ops = {
- .open = atmel_abdac_open,
- .close = atmel_abdac_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = atmel_abdac_hw_params,
- .hw_free = atmel_abdac_hw_free,
- .prepare = atmel_abdac_prepare,
- .trigger = atmel_abdac_trigger,
- .pointer = atmel_abdac_pointer,
-};
-
-static int atmel_abdac_pcm_new(struct atmel_abdac *dac)
-{
- struct snd_pcm_hardware hw = atmel_abdac_hw;
- struct snd_pcm *pcm;
- int retval;
-
- retval = snd_pcm_new(dac->card, dac->card->shortname,
- dac->pdev->id, 1, 0, &pcm);
- if (retval)
- return retval;
-
- strcpy(pcm->name, dac->card->shortname);
- pcm->private_data = dac;
- pcm->info_flags = 0;
- dac->pcm = pcm;
-
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &atmel_abdac_ops);
-
- retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
- &dac->pdev->dev, hw.periods_min * hw.period_bytes_min,
- hw.buffer_bytes_max);
-
- return retval;
-}
-
-static bool filter(struct dma_chan *chan, void *slave)
-{
- struct dw_dma_slave *dws = slave;
-
- if (dws->dma_dev == chan->device->dev) {
- chan->private = dws;
- return true;
- } else
- return false;
-}
-
-static int set_sample_rates(struct atmel_abdac *dac)
-{
- long new_rate = RATE_MAX;
- int retval = -EINVAL;
- int index = 0;
-
- /* we start at 192 kHz and work our way down to 5112 Hz */
- while (new_rate >= RATE_MIN && index < (MAX_NUM_RATES + 1)) {
- new_rate = clk_round_rate(dac->sample_clk, 256 * new_rate);
- if (new_rate <= 0)
- break;
- /* make sure we are below the ABDAC clock */
- if (index < MAX_NUM_RATES &&
- new_rate <= clk_get_rate(dac->pclk)) {
- dac->rates[index] = new_rate / 256;
- index++;
- }
- /* divide by 256 and then by two to get next rate */
- new_rate /= 256 * 2;
- }
-
- if (index) {
- int i;
-
- /* reverse array, smallest go first */
- for (i = 0; i < (index / 2); i++) {
- unsigned int tmp = dac->rates[index - 1 - i];
- dac->rates[index - 1 - i] = dac->rates[i];
- dac->rates[i] = tmp;
- }
-
- dac->constraints_rates.count = index;
- dac->constraints_rates.list = dac->rates;
- dac->constraints_rates.mask = 0;
- dac->rates_num = index;
-
- retval = 0;
- }
-
- return retval;
-}
-
-static int atmel_abdac_probe(struct platform_device *pdev)
-{
- struct snd_card *card;
- struct atmel_abdac *dac;
- struct resource *regs;
- struct atmel_abdac_pdata *pdata;
- struct clk *pclk;
- struct clk *sample_clk;
- 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 number\n");
- return irq;
- }
-
- pdata = pdev->dev.platform_data;
- if (!pdata) {
- dev_dbg(&pdev->dev, "no platform data\n");
- return -ENXIO;
- }
-
- pclk = clk_get(&pdev->dev, "pclk");
- if (IS_ERR(pclk)) {
- dev_dbg(&pdev->dev, "no peripheral clock\n");
- return PTR_ERR(pclk);
- }
- sample_clk = clk_get(&pdev->dev, "sample_clk");
- if (IS_ERR(sample_clk)) {
- dev_dbg(&pdev->dev, "no sample clock\n");
- retval = PTR_ERR(sample_clk);
- goto out_put_pclk;
- }
- clk_prepare_enable(pclk);
-
- retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1,
- SNDRV_DEFAULT_STR1, THIS_MODULE,
- sizeof(struct atmel_abdac), &card);
- if (retval) {
- dev_dbg(&pdev->dev, "could not create sound card device\n");
- goto out_put_sample_clk;
- }
-
- dac = get_dac(card);
-
- dac->irq = irq;
- dac->card = card;
- dac->pclk = pclk;
- dac->sample_clk = sample_clk;
- dac->pdev = pdev;
-
- retval = set_sample_rates(dac);
- if (retval < 0) {
- dev_dbg(&pdev->dev, "could not set supported rates\n");
- goto out_free_card;
- }
-
- dac->regs = ioremap(regs->start, resource_size(regs));
- if (!dac->regs) {
- dev_dbg(&pdev->dev, "could not remap register memory\n");
- retval = -ENOMEM;
- goto out_free_card;
- }
-
- /* make sure the DAC is silent and disabled */
- dac_writel(dac, DATA, 0);
- dac_writel(dac, CTRL, 0);
-
- retval = request_irq(irq, abdac_interrupt, 0, "abdac", dac);
- if (retval) {
- dev_dbg(&pdev->dev, "could not request irq\n");
- goto out_unmap_regs;
- }
-
- if (pdata->dws.dma_dev) {
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- dac->dma.chan = dma_request_channel(mask, filter, &pdata->dws);
- if (dac->dma.chan) {
- struct dma_slave_config dma_conf = {
- .dst_addr = regs->start + DAC_DATA,
- .dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES,
- .src_maxburst = 1,
- .dst_maxburst = 1,
- .direction = DMA_MEM_TO_DEV,
- .device_fc = false,
- };
-
- dmaengine_slave_config(dac->dma.chan, &dma_conf);
- }
- }
- if (!pdata->dws.dma_dev || !dac->dma.chan) {
- dev_dbg(&pdev->dev, "DMA not available\n");
- retval = -ENODEV;
- goto out_unmap_regs;
- }
-
- strcpy(card->driver, "Atmel ABDAC");
- strcpy(card->shortname, "Atmel ABDAC");
- sprintf(card->longname, "Atmel Audio Bitstream DAC");
-
- retval = atmel_abdac_pcm_new(dac);
- if (retval) {
- dev_dbg(&pdev->dev, "could not register ABDAC pcm device\n");
- goto out_release_dma;
- }
-
- retval = snd_card_register(card);
- if (retval) {
- dev_dbg(&pdev->dev, "could not register sound card\n");
- goto out_release_dma;
- }
-
- platform_set_drvdata(pdev, card);
-
- dev_info(&pdev->dev, "Atmel ABDAC at 0x%p using %s\n",
- dac->regs, dev_name(&dac->dma.chan->dev->device));
-
- return retval;
-
-out_release_dma:
- dma_release_channel(dac->dma.chan);
- dac->dma.chan = NULL;
-out_unmap_regs:
- iounmap(dac->regs);
-out_free_card:
- snd_card_free(card);
-out_put_sample_clk:
- clk_put(sample_clk);
- clk_disable_unprepare(pclk);
-out_put_pclk:
- clk_put(pclk);
- return retval;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int atmel_abdac_suspend(struct device *pdev)
-{
- struct snd_card *card = dev_get_drvdata(pdev);
- struct atmel_abdac *dac = card->private_data;
-
- dw_dma_cyclic_stop(dac->dma.chan);
- clk_disable_unprepare(dac->sample_clk);
- clk_disable_unprepare(dac->pclk);
-
- return 0;
-}
-
-static int atmel_abdac_resume(struct device *pdev)
-{
- struct snd_card *card = dev_get_drvdata(pdev);
- struct atmel_abdac *dac = card->private_data;
-
- clk_prepare_enable(dac->pclk);
- clk_prepare_enable(dac->sample_clk);
- if (test_bit(DMA_READY, &dac->flags))
- dw_dma_cyclic_start(dac->dma.chan);
-
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(atmel_abdac_pm, atmel_abdac_suspend, atmel_abdac_resume);
-#define ATMEL_ABDAC_PM_OPS &atmel_abdac_pm
-#else
-#define ATMEL_ABDAC_PM_OPS NULL
-#endif
-
-static int atmel_abdac_remove(struct platform_device *pdev)
-{
- struct snd_card *card = platform_get_drvdata(pdev);
- struct atmel_abdac *dac = get_dac(card);
-
- clk_put(dac->sample_clk);
- clk_disable_unprepare(dac->pclk);
- clk_put(dac->pclk);
-
- dma_release_channel(dac->dma.chan);
- dac->dma.chan = NULL;
- iounmap(dac->regs);
- free_irq(dac->irq, dac);
- snd_card_free(card);
-
- return 0;
-}
-
-static struct platform_driver atmel_abdac_driver = {
- .remove = atmel_abdac_remove,
- .driver = {
- .name = "atmel_abdac",
- .pm = ATMEL_ABDAC_PM_OPS,
- },
-};
-
-static int __init atmel_abdac_init(void)
-{
- return platform_driver_probe(&atmel_abdac_driver,
- atmel_abdac_probe);
-}
-module_init(atmel_abdac_init);
-
-static void __exit atmel_abdac_exit(void)
-{
- platform_driver_unregister(&atmel_abdac_driver);
-}
-module_exit(atmel_abdac_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Driver for Atmel Audio Bitstream DAC (ABDAC)");
-MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index 6dad042630d8..65e6948e3995 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -11,8 +11,6 @@
#include <linux/delay.h>
#include <linux/bitmap.h>
#include <linux/device.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -34,36 +32,14 @@
#include <sound/atmel-ac97c.h>
#include <sound/memalloc.h>
-#include <linux/platform_data/dma-dw.h>
-#include <linux/dma/dw.h>
-
-#ifdef CONFIG_AVR32
-#include <mach/cpu.h>
-#else
-#define cpu_is_at32ap7000() 0
-#endif
-
#include "ac97c.h"
-enum {
- DMA_TX_READY = 0,
- DMA_RX_READY,
- DMA_TX_CHAN_PRESENT,
- DMA_RX_CHAN_PRESENT,
-};
-
/* Serialize access to opened variable */
static DEFINE_MUTEX(opened_mutex);
-struct atmel_ac97c_dma {
- struct dma_chan *rx_chan;
- struct dma_chan *tx_chan;
-};
-
struct atmel_ac97c {
struct clk *pclk;
struct platform_device *pdev;
- struct atmel_ac97c_dma dma;
struct snd_pcm_substream *playback_substream;
struct snd_pcm_substream *capture_substream;
@@ -74,7 +50,6 @@ struct atmel_ac97c {
u64 cur_format;
unsigned int cur_rate;
- unsigned long flags;
int playback_period, capture_period;
/* Serialize access to opened variable */
spinlock_t lock;
@@ -91,65 +66,6 @@ struct atmel_ac97c {
#define ac97c_readl(chip, reg) \
__raw_readl((chip)->regs + AC97C_##reg)
-/* This function is called by the DMA driver. */
-static void atmel_ac97c_dma_playback_period_done(void *arg)
-{
- struct atmel_ac97c *chip = arg;
- snd_pcm_period_elapsed(chip->playback_substream);
-}
-
-static void atmel_ac97c_dma_capture_period_done(void *arg)
-{
- struct atmel_ac97c *chip = arg;
- snd_pcm_period_elapsed(chip->capture_substream);
-}
-
-static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
- struct snd_pcm_substream *substream,
- enum dma_transfer_direction direction)
-{
- struct dma_chan *chan;
- struct dw_cyclic_desc *cdesc;
- struct snd_pcm_runtime *runtime = substream->runtime;
- unsigned long buffer_len, period_len;
-
- /*
- * We don't do DMA on "complex" transfers, i.e. with
- * non-halfword-aligned buffers or lengths.
- */
- if (runtime->dma_addr & 1 || runtime->buffer_size & 1) {
- dev_dbg(&chip->pdev->dev, "too complex transfer\n");
- return -EINVAL;
- }
-
- if (direction == DMA_MEM_TO_DEV)
- chan = chip->dma.tx_chan;
- else
- chan = chip->dma.rx_chan;
-
- buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
- period_len = frames_to_bytes(runtime, runtime->period_size);
-
- cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len,
- period_len, direction);
- if (IS_ERR(cdesc)) {
- dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n");
- return PTR_ERR(cdesc);
- }
-
- if (direction == DMA_MEM_TO_DEV) {
- cdesc->period_callback = atmel_ac97c_dma_playback_period_done;
- set_bit(DMA_TX_READY, &chip->flags);
- } else {
- cdesc->period_callback = atmel_ac97c_dma_capture_period_done;
- set_bit(DMA_RX_READY, &chip->flags);
- }
-
- cdesc->period_callback_param = chip;
-
- return 0;
-}
-
static struct snd_pcm_hardware atmel_ac97c_hw = {
.info = (SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_MMAP_VALID
@@ -254,13 +170,7 @@ static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream,
params_buffer_bytes(hw_params));
if (retval < 0)
return retval;
- /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (cpu_is_at32ap7000()) {
- /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
- }
+
/* Set restrictions to params. */
mutex_lock(&opened_mutex);
chip->cur_rate = params_rate(hw_params);
@@ -280,10 +190,6 @@ static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
params_buffer_bytes(hw_params));
if (retval < 0)
return retval;
- /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (cpu_is_at32ap7000() && retval == 1)
- if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.rx_chan);
/* Set restrictions to params. */
mutex_lock(&opened_mutex);
@@ -294,26 +200,6 @@ static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
return retval;
}
-static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream)
-{
- struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (cpu_is_at32ap7000()) {
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
- }
- return snd_pcm_lib_free_pages(substream);
-}
-
-static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream)
-{
- struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (cpu_is_at32ap7000()) {
- if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.rx_chan);
- }
- return snd_pcm_lib_free_pages(substream);
-}
-
static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
@@ -349,8 +235,6 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- if (cpu_is_at32ap7000())
- word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
word &= ~(AC97C_CMR_CEM_LITTLE);
@@ -389,18 +273,11 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (cpu_is_at32ap7000()) {
- if (!test_bit(DMA_TX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_MEM_TO_DEV);
- } else {
- /* Initialize and start the PDC */
- writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
- writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);
- writel(runtime->dma_addr + block_size,
- chip->regs + ATMEL_PDC_TNPR);
- writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
- }
+ /* 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;
}
@@ -440,8 +317,6 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- if (cpu_is_at32ap7000())
- word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
word &= ~(AC97C_CMR_CEM_LITTLE);
@@ -480,18 +355,11 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (cpu_is_at32ap7000()) {
- if (!test_bit(DMA_RX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_DEV_TO_MEM);
- } else {
- /* Initialize and start the PDC */
- writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);
- writel(block_size / 2, chip->regs + ATMEL_PDC_RCR);
- writel(runtime->dma_addr + block_size,
- chip->regs + ATMEL_PDC_RNPR);
- writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);
- }
+ /* 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;
}
@@ -501,7 +369,6 @@ atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
unsigned long camr, ptcr = 0;
- int retval = 0;
camr = ac97c_readl(chip, CAMR);
@@ -509,35 +376,23 @@ atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
case SNDRV_PCM_TRIGGER_START:
- if (cpu_is_at32ap7000()) {
- retval = dw_dma_cyclic_start(chip->dma.tx_chan);
- if (retval)
- goto out;
- } else {
- ptcr = ATMEL_PDC_TXTEN;
- }
+ ptcr = ATMEL_PDC_TXTEN;
camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
case SNDRV_PCM_TRIGGER_STOP:
- if (cpu_is_at32ap7000())
- dw_dma_cyclic_stop(chip->dma.tx_chan);
- else
- ptcr |= ATMEL_PDC_TXTDIS;
+ ptcr |= ATMEL_PDC_TXTDIS;
if (chip->opened <= 1)
camr &= ~AC97C_CMR_CENA;
break;
default:
- retval = -EINVAL;
- goto out;
+ return -EINVAL;
}
ac97c_writel(chip, CAMR, camr);
- if (!cpu_is_at32ap7000())
- writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
-out:
- return retval;
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
+ return 0;
}
static int
@@ -545,7 +400,6 @@ atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
unsigned long camr, ptcr = 0;
- int retval = 0;
camr = ac97c_readl(chip, CAMR);
ptcr = readl(chip->regs + ATMEL_PDC_PTSR);
@@ -554,35 +408,23 @@ atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
case SNDRV_PCM_TRIGGER_START:
- if (cpu_is_at32ap7000()) {
- retval = dw_dma_cyclic_start(chip->dma.rx_chan);
- if (retval)
- goto out;
- } else {
- ptcr = ATMEL_PDC_RXTEN;
- }
+ ptcr = ATMEL_PDC_RXTEN;
camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
case SNDRV_PCM_TRIGGER_STOP:
- if (cpu_is_at32ap7000())
- dw_dma_cyclic_stop(chip->dma.rx_chan);
- else
- ptcr |= (ATMEL_PDC_RXTDIS);
+ ptcr |= ATMEL_PDC_RXTDIS;
if (chip->opened <= 1)
camr &= ~AC97C_CMR_CENA;
break;
default:
- retval = -EINVAL;
- break;
+ return -EINVAL;
}
ac97c_writel(chip, CAMR, camr);
- if (!cpu_is_at32ap7000())
- writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
-out:
- return retval;
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
+ return 0;
}
static snd_pcm_uframes_t
@@ -593,10 +435,7 @@ atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream)
snd_pcm_uframes_t frames;
unsigned long bytes;
- if (cpu_is_at32ap7000())
- bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
- else
- bytes = readl(chip->regs + ATMEL_PDC_TPR);
+ bytes = readl(chip->regs + ATMEL_PDC_TPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -613,10 +452,7 @@ atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream)
snd_pcm_uframes_t frames;
unsigned long bytes;
- if (cpu_is_at32ap7000())
- bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
- else
- bytes = readl(chip->regs + ATMEL_PDC_RPR);
+ bytes = readl(chip->regs + ATMEL_PDC_RPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -630,7 +466,7 @@ static struct snd_pcm_ops atmel_ac97_playback_ops = {
.close = atmel_ac97c_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = atmel_ac97c_playback_hw_params,
- .hw_free = atmel_ac97c_playback_hw_free,
+ .hw_free = snd_pcm_lib_free_pages,
.prepare = atmel_ac97c_playback_prepare,
.trigger = atmel_ac97c_playback_trigger,
.pointer = atmel_ac97c_playback_pointer,
@@ -641,7 +477,7 @@ static struct snd_pcm_ops atmel_ac97_capture_ops = {
.close = atmel_ac97c_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = atmel_ac97c_capture_hw_params,
- .hw_free = atmel_ac97c_capture_hw_free,
+ .hw_free = snd_pcm_lib_free_pages,
.prepare = atmel_ac97c_capture_prepare,
.trigger = atmel_ac97c_capture_trigger,
.pointer = atmel_ac97c_capture_pointer,
@@ -666,49 +502,40 @@ static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev)
casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "",
casr & AC97C_CSR_TXRDY ? " TXRDY" : "",
!casr ? " NONE" : "");
- if (!cpu_is_at32ap7000()) {
- if ((casr & camr) & AC97C_CSR_ENDTX) {
- runtime = chip->playback_substream->runtime;
- block_size = frames_to_bytes(runtime,
- runtime->period_size);
- chip->playback_period++;
-
- if (chip->playback_period == runtime->periods)
- chip->playback_period = 0;
- next_period = chip->playback_period + 1;
- if (next_period == runtime->periods)
- next_period = 0;
-
- offset = block_size * next_period;
-
- writel(runtime->dma_addr + offset,
- chip->regs + ATMEL_PDC_TNPR);
- writel(block_size / 2,
- chip->regs + ATMEL_PDC_TNCR);
-
- snd_pcm_period_elapsed(
- chip->playback_substream);
- }
- if ((casr & camr) & AC97C_CSR_ENDRX) {
- runtime = chip->capture_substream->runtime;
- block_size = frames_to_bytes(runtime,
- runtime->period_size);
- chip->capture_period++;
-
- if (chip->capture_period == runtime->periods)
- chip->capture_period = 0;
- next_period = chip->capture_period + 1;
- if (next_period == runtime->periods)
- next_period = 0;
-
- offset = block_size * next_period;
-
- writel(runtime->dma_addr + offset,
- chip->regs + ATMEL_PDC_RNPR);
- writel(block_size / 2,
- chip->regs + ATMEL_PDC_RNCR);
- snd_pcm_period_elapsed(chip->capture_substream);
- }
+ 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;
}
@@ -763,29 +590,20 @@ static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
{
struct snd_pcm *pcm;
struct snd_pcm_hardware hw = atmel_ac97c_hw;
- int capture, playback, retval, err;
+ int retval;
- capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ retval = snd_ac97_pcm_assign(chip->ac97_bus,
+ ARRAY_SIZE(at91_ac97_pcm_defs),
+ at91_ac97_pcm_defs);
+ if (retval)
+ return retval;
- if (!cpu_is_at32ap7000()) {
- err = snd_ac97_pcm_assign(chip->ac97_bus,
- ARRAY_SIZE(at91_ac97_pcm_defs),
- at91_ac97_pcm_defs);
- if (err)
- return err;
- }
- retval = snd_pcm_new(chip->card, chip->card->shortname,
- 0, playback, capture, &pcm);
+ retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
if (retval)
return retval;
- if (capture)
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
- &atmel_ac97_capture_ops);
- if (playback)
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
- &atmel_ac97_playback_ops);
+ 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,
@@ -875,17 +693,6 @@ static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97,
return 0xffff;
}
-static bool filter(struct dma_chan *chan, void *slave)
-{
- struct dw_dma_slave *dws = slave;
-
- if (dws->dma_dev == chan->device->dev) {
- chan->private = dws;
- return true;
- } else
- return false;
-}
-
static void atmel_ac97c_reset(struct atmel_ac97c *chip)
{
ac97c_writel(chip, MR, 0);
@@ -971,12 +778,7 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
return -ENXIO;
}
- if (cpu_is_at32ap7000()) {
- pclk = clk_get(&pdev->dev, "pclk");
- } else {
- pclk = clk_get(&pdev->dev, "ac97_clk");
- }
-
+ pclk = clk_get(&pdev->dev, "ac97_clk");
if (IS_ERR(pclk)) {
dev_dbg(&pdev->dev, "no peripheral clock\n");
return PTR_ERR(pclk);
@@ -1047,88 +849,16 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
goto err_ac97_bus;
}
- if (cpu_is_at32ap7000()) {
- if (pdata->rx_dws.dma_dev) {
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- chip->dma.rx_chan = dma_request_channel(mask, filter,
- &pdata->rx_dws);
- if (chip->dma.rx_chan) {
- struct dma_slave_config dma_conf = {
- .src_addr = regs->start + AC97C_CARHR +
- 2,
- .src_addr_width =
- DMA_SLAVE_BUSWIDTH_2_BYTES,
- .src_maxburst = 1,
- .dst_maxburst = 1,
- .direction = DMA_DEV_TO_MEM,
- .device_fc = false,
- };
-
- dmaengine_slave_config(chip->dma.rx_chan,
- &dma_conf);
- }
-
- dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
- dev_name(&chip->dma.rx_chan->dev->device));
- set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- }
-
- if (pdata->tx_dws.dma_dev) {
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- chip->dma.tx_chan = dma_request_channel(mask, filter,
- &pdata->tx_dws);
- if (chip->dma.tx_chan) {
- struct dma_slave_config dma_conf = {
- .dst_addr = regs->start + AC97C_CATHR +
- 2,
- .dst_addr_width =
- DMA_SLAVE_BUSWIDTH_2_BYTES,
- .src_maxburst = 1,
- .dst_maxburst = 1,
- .direction = DMA_MEM_TO_DEV,
- .device_fc = false,
- };
-
- dmaengine_slave_config(chip->dma.tx_chan,
- &dma_conf);
- }
-
- dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
- dev_name(&chip->dma.tx_chan->dev->device));
- set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- }
-
- if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
- !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
- dev_dbg(&pdev->dev, "DMA not available\n");
- retval = -ENODEV;
- goto err_dma;
- }
- } else {
- /* Just pretend that we have DMA channel(for at91 i is actually
- * the PDC) */
- set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- }
-
retval = atmel_ac97c_pcm_new(chip);
if (retval) {
dev_dbg(&pdev->dev, "could not register ac97 pcm device\n");
- goto err_dma;
+ goto err_ac97_bus;
}
retval = snd_card_register(card);
if (retval) {
dev_dbg(&pdev->dev, "could not register sound card\n");
- goto err_dma;
+ goto err_ac97_bus;
}
platform_set_drvdata(pdev, card);
@@ -1138,17 +868,6 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
return 0;
-err_dma:
- if (cpu_is_at32ap7000()) {
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
- }
err_ac97_bus:
if (gpio_is_valid(chip->reset_pin))
gpio_free(chip->reset_pin);
@@ -1170,14 +889,7 @@ static int atmel_ac97c_suspend(struct device *pdev)
struct snd_card *card = dev_get_drvdata(pdev);
struct atmel_ac97c *chip = card->private_data;
- if (cpu_is_at32ap7000()) {
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.tx_chan);
- }
clk_disable_unprepare(chip->pclk);
-
return 0;
}
@@ -1187,12 +899,6 @@ static int atmel_ac97c_resume(struct device *pdev)
struct atmel_ac97c *chip = card->private_data;
clk_prepare_enable(chip->pclk);
- if (cpu_is_at32ap7000()) {
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.tx_chan);
- }
return 0;
}
@@ -1219,17 +925,6 @@ static int atmel_ac97c_remove(struct platform_device *pdev)
iounmap(chip->regs);
free_irq(chip->irq, chip);
- if (cpu_is_at32ap7000()) {
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
- }
-
snd_card_free(card);
return 0;
--
2.11.0
^ permalink raw reply related [flat|nested] 11+ messages in thread* [PATCH v2 2/2] dmaengine: dw: Remove AVR32 bits from the driver
2017-05-09 16:18 [PATCH v2 0/2] ALSA, dmaengine: dw: Remove AVR32 bits in drivers Andy Shevchenko
2017-05-09 16:18 ` [PATCH v2 1/2] ALSA: atmel: Remove AVR32 bits from the driver Andy Shevchenko
@ 2017-05-09 16:18 ` Andy Shevchenko
2017-05-14 13:04 ` Vinod Koul
1 sibling, 1 reply; 11+ messages in thread
From: Andy Shevchenko @ 2017-05-09 16:18 UTC (permalink / raw)
To: Hans-Christian Noren Egtvedt, linux-kernel, Haavard Skinnemoen,
Nicolas Ferre, Boris Brezillon, Mark Brown, Liam Girdwood,
alsa-devel, Vinod Koul, dmaengine, Eugeniy Paltsev
Cc: Andy Shevchenko
AVR32 is gone. Now it's time to clean up the driver by removing
leftovers that was used by AVR32 related code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/dma/dw/Kconfig | 7 +-
drivers/dma/dw/core.c | 332 +------------------------------------------------
drivers/dma/dw/regs.h | 50 ++------
include/linux/dma/dw.h | 21 ----
4 files changed, 14 insertions(+), 396 deletions(-)
diff --git a/drivers/dma/dw/Kconfig b/drivers/dma/dw/Kconfig
index 5a37b9fcf40d..04b9728c1d26 100644
--- a/drivers/dma/dw/Kconfig
+++ b/drivers/dma/dw/Kconfig
@@ -6,17 +6,12 @@ config DW_DMAC_CORE
tristate
select DMA_ENGINE
-config DW_DMAC_BIG_ENDIAN_IO
- bool
-
config DW_DMAC
tristate "Synopsys DesignWare AHB DMA platform driver"
select DW_DMAC_CORE
- select DW_DMAC_BIG_ENDIAN_IO if AVR32
- default y if CPU_AT32AP7000
help
Support the Synopsys DesignWare AHB DMA controller. This
- can be integrated in chips such as the Atmel AT32ap7000.
+ can be integrated in chips such as the Intel Cherrytrail.
config DW_DMAC_PCI
tristate "Synopsys DesignWare AHB DMA PCI driver"
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index e500950dad82..f43e6dafe446 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -561,92 +561,14 @@ static void dwc_handle_error(struct dw_dma *dw, struct dw_dma_chan *dwc)
dwc_descriptor_complete(dwc, bad_desc, true);
}
-/* --------------------- Cyclic DMA API extensions -------------------- */
-
-dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- return channel_readl(dwc, SAR);
-}
-EXPORT_SYMBOL(dw_dma_get_src_addr);
-
-dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- return channel_readl(dwc, DAR);
-}
-EXPORT_SYMBOL(dw_dma_get_dst_addr);
-
-/* Called with dwc->lock held and all DMAC interrupts disabled */
-static void dwc_handle_cyclic(struct dw_dma *dw, struct dw_dma_chan *dwc,
- u32 status_block, u32 status_err, u32 status_xfer)
-{
- unsigned long flags;
-
- if (status_block & dwc->mask) {
- void (*callback)(void *param);
- void *callback_param;
-
- dev_vdbg(chan2dev(&dwc->chan), "new cyclic period llp 0x%08x\n",
- channel_readl(dwc, LLP));
- dma_writel(dw, CLEAR.BLOCK, dwc->mask);
-
- callback = dwc->cdesc->period_callback;
- callback_param = dwc->cdesc->period_callback_param;
-
- if (callback)
- callback(callback_param);
- }
-
- /*
- * Error and transfer complete are highly unlikely, and will most
- * likely be due to a configuration error by the user.
- */
- if (unlikely(status_err & dwc->mask) ||
- unlikely(status_xfer & dwc->mask)) {
- unsigned int i;
-
- dev_err(chan2dev(&dwc->chan),
- "cyclic DMA unexpected %s interrupt, stopping DMA transfer\n",
- status_xfer ? "xfer" : "error");
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- dwc_dump_chan_regs(dwc);
-
- dwc_chan_disable(dw, dwc);
-
- /* Make sure DMA does not restart by loading a new list */
- channel_writel(dwc, LLP, 0);
- channel_writel(dwc, CTL_LO, 0);
- channel_writel(dwc, CTL_HI, 0);
-
- dma_writel(dw, CLEAR.BLOCK, dwc->mask);
- dma_writel(dw, CLEAR.ERROR, dwc->mask);
- dma_writel(dw, CLEAR.XFER, dwc->mask);
-
- for (i = 0; i < dwc->cdesc->periods; i++)
- dwc_dump_lli(dwc, dwc->cdesc->desc[i]);
-
- spin_unlock_irqrestore(&dwc->lock, flags);
- }
-
- /* Re-enable interrupts */
- channel_set_bit(dw, MASK.BLOCK, dwc->mask);
-}
-
-/* ------------------------------------------------------------------------- */
-
static void dw_dma_tasklet(unsigned long data)
{
struct dw_dma *dw = (struct dw_dma *)data;
struct dw_dma_chan *dwc;
- u32 status_block;
u32 status_xfer;
u32 status_err;
unsigned int i;
- status_block = dma_readl(dw, RAW.BLOCK);
status_xfer = dma_readl(dw, RAW.XFER);
status_err = dma_readl(dw, RAW.ERROR);
@@ -655,8 +577,7 @@ static void dw_dma_tasklet(unsigned long data)
for (i = 0; i < dw->dma.chancnt; i++) {
dwc = &dw->chan[i];
if (test_bit(DW_DMA_IS_CYCLIC, &dwc->flags))
- dwc_handle_cyclic(dw, dwc, status_block, status_err,
- status_xfer);
+ dev_vdbg(dw->dma.dev, "Cyclic xfer is not implemented\n");
else if (status_err & (1 << i))
dwc_handle_error(dw, dwc);
else if (status_xfer & (1 << i))
@@ -1264,255 +1185,6 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
dev_vdbg(chan2dev(chan), "%s: done\n", __func__);
}
-/* --------------------- Cyclic DMA API extensions -------------------- */
-
-/**
- * dw_dma_cyclic_start - start the cyclic DMA transfer
- * @chan: the DMA channel to start
- *
- * Must be called with soft interrupts disabled. Returns zero on success or
- * -errno on failure.
- */
-int dw_dma_cyclic_start(struct dma_chan *chan)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- struct dw_dma *dw = to_dw_dma(chan->device);
- unsigned long flags;
-
- if (!test_bit(DW_DMA_IS_CYCLIC, &dwc->flags)) {
- dev_err(chan2dev(&dwc->chan), "missing prep for cyclic DMA\n");
- return -ENODEV;
- }
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- /* Enable interrupts to perform cyclic transfer */
- channel_set_bit(dw, MASK.BLOCK, dwc->mask);
-
- dwc_dostart(dwc, dwc->cdesc->desc[0]);
-
- spin_unlock_irqrestore(&dwc->lock, flags);
-
- return 0;
-}
-EXPORT_SYMBOL(dw_dma_cyclic_start);
-
-/**
- * dw_dma_cyclic_stop - stop the cyclic DMA transfer
- * @chan: the DMA channel to stop
- *
- * Must be called with soft interrupts disabled.
- */
-void dw_dma_cyclic_stop(struct dma_chan *chan)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- struct dw_dma *dw = to_dw_dma(dwc->chan.device);
- unsigned long flags;
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- dwc_chan_disable(dw, dwc);
-
- spin_unlock_irqrestore(&dwc->lock, flags);
-}
-EXPORT_SYMBOL(dw_dma_cyclic_stop);
-
-/**
- * dw_dma_cyclic_prep - prepare the cyclic DMA transfer
- * @chan: the DMA channel to prepare
- * @buf_addr: physical DMA address where the buffer starts
- * @buf_len: total number of bytes for the entire buffer
- * @period_len: number of bytes for each period
- * @direction: transfer direction, to or from device
- *
- * Must be called before trying to start the transfer. Returns a valid struct
- * dw_cyclic_desc if successful or an ERR_PTR(-errno) if not successful.
- */
-struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
- dma_addr_t buf_addr, size_t buf_len, size_t period_len,
- enum dma_transfer_direction direction)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- struct dma_slave_config *sconfig = &dwc->dma_sconfig;
- struct dw_cyclic_desc *cdesc;
- struct dw_cyclic_desc *retval = NULL;
- struct dw_desc *desc;
- struct dw_desc *last = NULL;
- u8 lms = DWC_LLP_LMS(dwc->dws.m_master);
- unsigned long was_cyclic;
- unsigned int reg_width;
- unsigned int periods;
- unsigned int i;
- unsigned long flags;
-
- spin_lock_irqsave(&dwc->lock, flags);
- if (dwc->nollp) {
- spin_unlock_irqrestore(&dwc->lock, flags);
- dev_dbg(chan2dev(&dwc->chan),
- "channel doesn't support LLP transfers\n");
- return ERR_PTR(-EINVAL);
- }
-
- if (!list_empty(&dwc->queue) || !list_empty(&dwc->active_list)) {
- spin_unlock_irqrestore(&dwc->lock, flags);
- dev_dbg(chan2dev(&dwc->chan),
- "queue and/or active list are not empty\n");
- return ERR_PTR(-EBUSY);
- }
-
- was_cyclic = test_and_set_bit(DW_DMA_IS_CYCLIC, &dwc->flags);
- spin_unlock_irqrestore(&dwc->lock, flags);
- if (was_cyclic) {
- dev_dbg(chan2dev(&dwc->chan),
- "channel already prepared for cyclic DMA\n");
- return ERR_PTR(-EBUSY);
- }
-
- retval = ERR_PTR(-EINVAL);
-
- if (unlikely(!is_slave_direction(direction)))
- goto out_err;
-
- dwc->direction = direction;
-
- if (direction == DMA_MEM_TO_DEV)
- reg_width = __ffs(sconfig->dst_addr_width);
- else
- reg_width = __ffs(sconfig->src_addr_width);
-
- periods = buf_len / period_len;
-
- /* Check for too big/unaligned periods and unaligned DMA buffer. */
- if (period_len > (dwc->block_size << reg_width))
- goto out_err;
- if (unlikely(period_len & ((1 << reg_width) - 1)))
- goto out_err;
- if (unlikely(buf_addr & ((1 << reg_width) - 1)))
- goto out_err;
-
- retval = ERR_PTR(-ENOMEM);
-
- cdesc = kzalloc(sizeof(struct dw_cyclic_desc), GFP_KERNEL);
- if (!cdesc)
- goto out_err;
-
- cdesc->desc = kzalloc(sizeof(struct dw_desc *) * periods, GFP_KERNEL);
- if (!cdesc->desc)
- goto out_err_alloc;
-
- for (i = 0; i < periods; i++) {
- desc = dwc_desc_get(dwc);
- if (!desc)
- goto out_err_desc_get;
-
- switch (direction) {
- case DMA_MEM_TO_DEV:
- lli_write(desc, dar, sconfig->dst_addr);
- lli_write(desc, sar, buf_addr + period_len * i);
- lli_write(desc, ctllo, (DWC_DEFAULT_CTLLO(chan)
- | DWC_CTLL_DST_WIDTH(reg_width)
- | DWC_CTLL_SRC_WIDTH(reg_width)
- | DWC_CTLL_DST_FIX
- | DWC_CTLL_SRC_INC
- | DWC_CTLL_INT_EN));
-
- lli_set(desc, ctllo, sconfig->device_fc ?
- DWC_CTLL_FC(DW_DMA_FC_P_M2P) :
- DWC_CTLL_FC(DW_DMA_FC_D_M2P));
-
- break;
- case DMA_DEV_TO_MEM:
- lli_write(desc, dar, buf_addr + period_len * i);
- lli_write(desc, sar, sconfig->src_addr);
- lli_write(desc, ctllo, (DWC_DEFAULT_CTLLO(chan)
- | DWC_CTLL_SRC_WIDTH(reg_width)
- | DWC_CTLL_DST_WIDTH(reg_width)
- | DWC_CTLL_DST_INC
- | DWC_CTLL_SRC_FIX
- | DWC_CTLL_INT_EN));
-
- lli_set(desc, ctllo, sconfig->device_fc ?
- DWC_CTLL_FC(DW_DMA_FC_P_P2M) :
- DWC_CTLL_FC(DW_DMA_FC_D_P2M));
-
- break;
- default:
- break;
- }
-
- lli_write(desc, ctlhi, period_len >> reg_width);
- cdesc->desc[i] = desc;
-
- if (last)
- lli_write(last, llp, desc->txd.phys | lms);
-
- last = desc;
- }
-
- /* Let's make a cyclic list */
- lli_write(last, llp, cdesc->desc[0]->txd.phys | lms);
-
- dev_dbg(chan2dev(&dwc->chan),
- "cyclic prepared buf %pad len %zu period %zu periods %d\n",
- &buf_addr, buf_len, period_len, periods);
-
- cdesc->periods = periods;
- dwc->cdesc = cdesc;
-
- return cdesc;
-
-out_err_desc_get:
- while (i--)
- dwc_desc_put(dwc, cdesc->desc[i]);
-out_err_alloc:
- kfree(cdesc);
-out_err:
- clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags);
- return (struct dw_cyclic_desc *)retval;
-}
-EXPORT_SYMBOL(dw_dma_cyclic_prep);
-
-/**
- * dw_dma_cyclic_free - free a prepared cyclic DMA transfer
- * @chan: the DMA channel to free
- */
-void dw_dma_cyclic_free(struct dma_chan *chan)
-{
- struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- struct dw_dma *dw = to_dw_dma(dwc->chan.device);
- struct dw_cyclic_desc *cdesc = dwc->cdesc;
- unsigned int i;
- unsigned long flags;
-
- dev_dbg(chan2dev(&dwc->chan), "%s\n", __func__);
-
- if (!cdesc)
- return;
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- dwc_chan_disable(dw, dwc);
-
- dma_writel(dw, CLEAR.BLOCK, dwc->mask);
- dma_writel(dw, CLEAR.ERROR, dwc->mask);
- dma_writel(dw, CLEAR.XFER, dwc->mask);
-
- spin_unlock_irqrestore(&dwc->lock, flags);
-
- for (i = 0; i < cdesc->periods; i++)
- dwc_desc_put(dwc, cdesc->desc[i]);
-
- kfree(cdesc->desc);
- kfree(cdesc);
-
- dwc->cdesc = NULL;
-
- clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags);
-}
-EXPORT_SYMBOL(dw_dma_cyclic_free);
-
-/*----------------------------------------------------------------------*/
-
int dw_dma_probe(struct dw_dma_chip *chip)
{
struct dw_dma_platform_data *pdata;
@@ -1642,7 +1314,7 @@ int dw_dma_probe(struct dw_dma_chip *chip)
if (autocfg) {
unsigned int r = DW_DMA_MAX_NR_CHANNELS - i - 1;
void __iomem *addr = &__dw_regs(dw)->DWC_PARAMS[r];
- unsigned int dwc_params = dma_readl_native(addr);
+ unsigned int dwc_params = readl(addr);
dev_dbg(chip->dev, "DWC_PARAMS[%d]: 0x%08x\n", i,
dwc_params);
diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index 32a328721c88..09e7dfdbb790 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -116,20 +116,6 @@ struct dw_dma_regs {
DW_REG(GLOBAL_CFG);
};
-/*
- * Big endian I/O access when reading and writing to the DMA controller
- * registers. This is needed on some platforms, like the Atmel AVR32
- * architecture.
- */
-
-#ifdef CONFIG_DW_DMAC_BIG_ENDIAN_IO
-#define dma_readl_native ioread32be
-#define dma_writel_native iowrite32be
-#else
-#define dma_readl_native readl
-#define dma_writel_native writel
-#endif
-
/* Bitfields in DW_PARAMS */
#define DW_PARAMS_NR_CHAN 8 /* number of channels */
#define DW_PARAMS_NR_MASTER 11 /* number of AHB masters */
@@ -280,7 +266,6 @@ struct dw_dma_chan {
unsigned long flags;
struct list_head active_list;
struct list_head queue;
- struct dw_cyclic_desc *cdesc;
unsigned int descs_allocated;
@@ -302,9 +287,9 @@ __dwc_regs(struct dw_dma_chan *dwc)
}
#define channel_readl(dwc, name) \
- dma_readl_native(&(__dwc_regs(dwc)->name))
+ readl(&(__dwc_regs(dwc)->name))
#define channel_writel(dwc, name, val) \
- dma_writel_native((val), &(__dwc_regs(dwc)->name))
+ writel((val), &(__dwc_regs(dwc)->name))
static inline struct dw_dma_chan *to_dw_dma_chan(struct dma_chan *chan)
{
@@ -333,9 +318,9 @@ static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw)
}
#define dma_readl(dw, name) \
- dma_readl_native(&(__dw_regs(dw)->name))
+ readl(&(__dw_regs(dw)->name))
#define dma_writel(dw, name, val) \
- dma_writel_native((val), &(__dw_regs(dw)->name))
+ writel((val), &(__dw_regs(dw)->name))
#define idma32_readq(dw, name) \
hi_lo_readq(&(__dw_regs(dw)->name))
@@ -352,43 +337,30 @@ static inline struct dw_dma *to_dw_dma(struct dma_device *ddev)
return container_of(ddev, struct dw_dma, dma);
}
-#ifdef CONFIG_DW_DMAC_BIG_ENDIAN_IO
-typedef __be32 __dw32;
-#else
-typedef __le32 __dw32;
-#endif
-
/* LLI == Linked List Item; a.k.a. DMA block descriptor */
struct dw_lli {
/* values that are not changed by hardware */
- __dw32 sar;
- __dw32 dar;
- __dw32 llp; /* chain to next lli */
- __dw32 ctllo;
+ __le32 sar;
+ __le32 dar;
+ __le32 llp; /* chain to next lli */
+ __le32 ctllo;
/* values that may get written back: */
- __dw32 ctlhi;
+ __le32 ctlhi;
/* sstat and dstat can snapshot peripheral register state.
* silicon config may discard either or both...
*/
- __dw32 sstat;
- __dw32 dstat;
+ __le32 sstat;
+ __le32 dstat;
};
struct dw_desc {
/* FIRST values the hardware uses */
struct dw_lli lli;
-#ifdef CONFIG_DW_DMAC_BIG_ENDIAN_IO
-#define lli_set(d, reg, v) ((d)->lli.reg |= cpu_to_be32(v))
-#define lli_clear(d, reg, v) ((d)->lli.reg &= ~cpu_to_be32(v))
-#define lli_read(d, reg) be32_to_cpu((d)->lli.reg)
-#define lli_write(d, reg, v) ((d)->lli.reg = cpu_to_be32(v))
-#else
#define lli_set(d, reg, v) ((d)->lli.reg |= cpu_to_le32(v))
#define lli_clear(d, reg, v) ((d)->lli.reg &= ~cpu_to_le32(v))
#define lli_read(d, reg) le32_to_cpu((d)->lli.reg)
#define lli_write(d, reg, v) ((d)->lli.reg = cpu_to_le32(v))
-#endif
/* THEN values for driver housekeeping */
struct list_head desc_node;
diff --git a/include/linux/dma/dw.h b/include/linux/dma/dw.h
index b63b25814d77..e166cac8e870 100644
--- a/include/linux/dma/dw.h
+++ b/include/linux/dma/dw.h
@@ -50,25 +50,4 @@ static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
#endif /* CONFIG_DW_DMAC_CORE */
-/* DMA API extensions */
-struct dw_desc;
-
-struct dw_cyclic_desc {
- struct dw_desc **desc;
- unsigned long periods;
- void (*period_callback)(void *param);
- void *period_callback_param;
-};
-
-struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
- dma_addr_t buf_addr, size_t buf_len, size_t period_len,
- enum dma_transfer_direction direction);
-void dw_dma_cyclic_free(struct dma_chan *chan);
-int dw_dma_cyclic_start(struct dma_chan *chan);
-void dw_dma_cyclic_stop(struct dma_chan *chan);
-
-dma_addr_t dw_dma_get_src_addr(struct dma_chan *chan);
-
-dma_addr_t dw_dma_get_dst_addr(struct dma_chan *chan);
-
#endif /* _DMA_DW_H */
--
2.11.0
^ permalink raw reply related [flat|nested] 11+ messages in thread