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linux/sound/soc/omap/mcpdm.c
Liam Girdwood f0fba2ad1b ASoC: multi-component - ASoC Multi-Component Support 
This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12 14:00:00 +01:00

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/*
* mcpdm.c -- McPDM interface driver
*
* Author: Jorge Eduardo Candelaria <x0107209@ti.com>
* Copyright (C) 2009 - Texas Instruments, Inc.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/irq.h>
#include "mcpdm.h"
static struct omap_mcpdm *mcpdm;
static inline void omap_mcpdm_write(u16 reg, u32 val)
{
__raw_writel(val, mcpdm->io_base + reg);
}
static inline int omap_mcpdm_read(u16 reg)
{
return __raw_readl(mcpdm->io_base + reg);
}
static void omap_mcpdm_reg_dump(void)
{
dev_dbg(mcpdm->dev, "***********************\n");
dev_dbg(mcpdm->dev, "IRQSTATUS_RAW: 0x%04x\n",
omap_mcpdm_read(MCPDM_IRQSTATUS_RAW));
dev_dbg(mcpdm->dev, "IRQSTATUS: 0x%04x\n",
omap_mcpdm_read(MCPDM_IRQSTATUS));
dev_dbg(mcpdm->dev, "IRQENABLE_SET: 0x%04x\n",
omap_mcpdm_read(MCPDM_IRQENABLE_SET));
dev_dbg(mcpdm->dev, "IRQENABLE_CLR: 0x%04x\n",
omap_mcpdm_read(MCPDM_IRQENABLE_CLR));
dev_dbg(mcpdm->dev, "IRQWAKE_EN: 0x%04x\n",
omap_mcpdm_read(MCPDM_IRQWAKE_EN));
dev_dbg(mcpdm->dev, "DMAENABLE_SET: 0x%04x\n",
omap_mcpdm_read(MCPDM_DMAENABLE_SET));
dev_dbg(mcpdm->dev, "DMAENABLE_CLR: 0x%04x\n",
omap_mcpdm_read(MCPDM_DMAENABLE_CLR));
dev_dbg(mcpdm->dev, "DMAWAKEEN: 0x%04x\n",
omap_mcpdm_read(MCPDM_DMAWAKEEN));
dev_dbg(mcpdm->dev, "CTRL: 0x%04x\n",
omap_mcpdm_read(MCPDM_CTRL));
dev_dbg(mcpdm->dev, "DN_DATA: 0x%04x\n",
omap_mcpdm_read(MCPDM_DN_DATA));
dev_dbg(mcpdm->dev, "UP_DATA: 0x%04x\n",
omap_mcpdm_read(MCPDM_UP_DATA));
dev_dbg(mcpdm->dev, "FIFO_CTRL_DN: 0x%04x\n",
omap_mcpdm_read(MCPDM_FIFO_CTRL_DN));
dev_dbg(mcpdm->dev, "FIFO_CTRL_UP: 0x%04x\n",
omap_mcpdm_read(MCPDM_FIFO_CTRL_UP));
dev_dbg(mcpdm->dev, "DN_OFFSET: 0x%04x\n",
omap_mcpdm_read(MCPDM_DN_OFFSET));
dev_dbg(mcpdm->dev, "***********************\n");
}
/*
* Takes the McPDM module in and out of reset state.
* Uplink and downlink can be reset individually.
*/
static void omap_mcpdm_reset_capture(int reset)
{
int ctrl = omap_mcpdm_read(MCPDM_CTRL);
if (reset)
ctrl |= SW_UP_RST;
else
ctrl &= ~SW_UP_RST;
omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
static void omap_mcpdm_reset_playback(int reset)
{
int ctrl = omap_mcpdm_read(MCPDM_CTRL);
if (reset)
ctrl |= SW_DN_RST;
else
ctrl &= ~SW_DN_RST;
omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
* Enables the transfer through the PDM interface to/from the Phoenix
* codec by enabling the corresponding UP or DN channels.
*/
void omap_mcpdm_start(int stream)
{
int ctrl = omap_mcpdm_read(MCPDM_CTRL);
if (stream)
ctrl |= mcpdm->up_channels;
else
ctrl |= mcpdm->dn_channels;
omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
* Disables the transfer through the PDM interface to/from the Phoenix
* codec by disabling the corresponding UP or DN channels.
*/
void omap_mcpdm_stop(int stream)
{
int ctrl = omap_mcpdm_read(MCPDM_CTRL);
if (stream)
ctrl &= ~mcpdm->up_channels;
else
ctrl &= ~mcpdm->dn_channels;
omap_mcpdm_write(MCPDM_CTRL, ctrl);
}
/*
* Configures McPDM uplink for audio recording.
* This function should be called before omap_mcpdm_start.
*/
int omap_mcpdm_capture_open(struct omap_mcpdm_link *uplink)
{
int irq_mask = 0;
int ctrl;
if (!uplink)
return -EINVAL;
mcpdm->uplink = uplink;
/* Enable irq request generation */
irq_mask |= uplink->irq_mask & MCPDM_UPLINK_IRQ_MASK;
omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
/* Configure uplink threshold */
if (uplink->threshold > UP_THRES_MAX)
uplink->threshold = UP_THRES_MAX;
omap_mcpdm_write(MCPDM_FIFO_CTRL_UP, uplink->threshold);
/* Configure DMA controller */
omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_UP_ENABLE);
/* Set pdm out format */
ctrl = omap_mcpdm_read(MCPDM_CTRL);
ctrl &= ~PDMOUTFORMAT;
ctrl |= uplink->format & PDMOUTFORMAT;
/* Uplink channels */
mcpdm->up_channels = uplink->channels & (PDM_UP_MASK | PDM_STATUS_MASK);
omap_mcpdm_write(MCPDM_CTRL, ctrl);
return 0;
}
/*
* Configures McPDM downlink for audio playback.
* This function should be called before omap_mcpdm_start.
*/
int omap_mcpdm_playback_open(struct omap_mcpdm_link *downlink)
{
int irq_mask = 0;
int ctrl;
if (!downlink)
return -EINVAL;
mcpdm->downlink = downlink;
/* Enable irq request generation */
irq_mask |= downlink->irq_mask & MCPDM_DOWNLINK_IRQ_MASK;
omap_mcpdm_write(MCPDM_IRQENABLE_SET, irq_mask);
/* Configure uplink threshold */
if (downlink->threshold > DN_THRES_MAX)
downlink->threshold = DN_THRES_MAX;
omap_mcpdm_write(MCPDM_FIFO_CTRL_DN, downlink->threshold);
/* Enable DMA request generation */
omap_mcpdm_write(MCPDM_DMAENABLE_SET, DMA_DN_ENABLE);
/* Set pdm out format */
ctrl = omap_mcpdm_read(MCPDM_CTRL);
ctrl &= ~PDMOUTFORMAT;
ctrl |= downlink->format & PDMOUTFORMAT;
/* Downlink channels */
mcpdm->dn_channels = downlink->channels & (PDM_DN_MASK | PDM_CMD_MASK);
omap_mcpdm_write(MCPDM_CTRL, ctrl);
return 0;
}
/*
* Cleans McPDM uplink configuration.
* This function should be called when the stream is closed.
*/
int omap_mcpdm_capture_close(struct omap_mcpdm_link *uplink)
{
int irq_mask = 0;
if (!uplink)
return -EINVAL;
/* Disable irq request generation */
irq_mask |= uplink->irq_mask & MCPDM_UPLINK_IRQ_MASK;
omap_mcpdm_write(MCPDM_IRQENABLE_CLR, irq_mask);
/* Disable DMA request generation */
omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_UP_ENABLE);
/* Clear Downlink channels */
mcpdm->up_channels = 0;
mcpdm->uplink = NULL;
return 0;
}
/*
* Cleans McPDM downlink configuration.
* This function should be called when the stream is closed.
*/
int omap_mcpdm_playback_close(struct omap_mcpdm_link *downlink)
{
int irq_mask = 0;
if (!downlink)
return -EINVAL;
/* Disable irq request generation */
irq_mask |= downlink->irq_mask & MCPDM_DOWNLINK_IRQ_MASK;
omap_mcpdm_write(MCPDM_IRQENABLE_CLR, irq_mask);
/* Disable DMA request generation */
omap_mcpdm_write(MCPDM_DMAENABLE_CLR, DMA_DN_ENABLE);
/* clear Downlink channels */
mcpdm->dn_channels = 0;
mcpdm->downlink = NULL;
return 0;
}
static irqreturn_t omap_mcpdm_irq_handler(int irq, void *dev_id)
{
struct omap_mcpdm *mcpdm_irq = dev_id;
int irq_status;
irq_status = omap_mcpdm_read(MCPDM_IRQSTATUS);
/* Acknowledge irq event */
omap_mcpdm_write(MCPDM_IRQSTATUS, irq_status);
if (irq & MCPDM_DN_IRQ_FULL) {
dev_err(mcpdm_irq->dev, "DN FIFO error %x\n", irq_status);
omap_mcpdm_reset_playback(1);
omap_mcpdm_playback_open(mcpdm_irq->downlink);
omap_mcpdm_reset_playback(0);
}
if (irq & MCPDM_DN_IRQ_EMPTY) {
dev_err(mcpdm_irq->dev, "DN FIFO error %x\n", irq_status);
omap_mcpdm_reset_playback(1);
omap_mcpdm_playback_open(mcpdm_irq->downlink);
omap_mcpdm_reset_playback(0);
}
if (irq & MCPDM_DN_IRQ) {
dev_dbg(mcpdm_irq->dev, "DN write request\n");
}
if (irq & MCPDM_UP_IRQ_FULL) {
dev_err(mcpdm_irq->dev, "UP FIFO error %x\n", irq_status);
omap_mcpdm_reset_capture(1);
omap_mcpdm_capture_open(mcpdm_irq->uplink);
omap_mcpdm_reset_capture(0);
}
if (irq & MCPDM_UP_IRQ_EMPTY) {
dev_err(mcpdm_irq->dev, "UP FIFO error %x\n", irq_status);
omap_mcpdm_reset_capture(1);
omap_mcpdm_capture_open(mcpdm_irq->uplink);
omap_mcpdm_reset_capture(0);
}
if (irq & MCPDM_UP_IRQ) {
dev_dbg(mcpdm_irq->dev, "UP write request\n");
}
return IRQ_HANDLED;
}
int omap_mcpdm_request(void)
{
int ret;
clk_enable(mcpdm->clk);
spin_lock(&mcpdm->lock);
if (!mcpdm->free) {
dev_err(mcpdm->dev, "McPDM interface is in use\n");
spin_unlock(&mcpdm->lock);
ret = -EBUSY;
goto err;
}
mcpdm->free = 0;
spin_unlock(&mcpdm->lock);
/* Disable lines while request is ongoing */
omap_mcpdm_write(MCPDM_CTRL, 0x00);
ret = request_irq(mcpdm->irq, omap_mcpdm_irq_handler,
0, "McPDM", (void *)mcpdm);
if (ret) {
dev_err(mcpdm->dev, "Request for McPDM IRQ failed\n");
goto err;
}
return 0;
err:
clk_disable(mcpdm->clk);
return ret;
}
void omap_mcpdm_free(void)
{
spin_lock(&mcpdm->lock);
if (mcpdm->free) {
dev_err(mcpdm->dev, "McPDM interface is already free\n");
spin_unlock(&mcpdm->lock);
return;
}
mcpdm->free = 1;
spin_unlock(&mcpdm->lock);
clk_disable(mcpdm->clk);
free_irq(mcpdm->irq, (void *)mcpdm);
}
/* Enable/disable DC offset cancelation for the analog
* headset path (PDM channels 1 and 2).
*/
int omap_mcpdm_set_offset(int offset1, int offset2)
{
int offset;
if ((offset1 > DN_OFST_MAX) || (offset2 > DN_OFST_MAX))
return -EINVAL;
offset = (offset1 << DN_OFST_RX1) | (offset2 << DN_OFST_RX2);
/* offset cancellation for channel 1 */
if (offset1)
offset |= DN_OFST_RX1_EN;
else
offset &= ~DN_OFST_RX1_EN;
/* offset cancellation for channel 2 */
if (offset2)
offset |= DN_OFST_RX2_EN;
else
offset &= ~DN_OFST_RX2_EN;
omap_mcpdm_write(MCPDM_DN_OFFSET, offset);
return 0;
}
int __devinit omap_mcpdm_probe(struct platform_device *pdev)
{
struct resource *res;
int ret = 0;
mcpdm = kzalloc(sizeof(struct omap_mcpdm), GFP_KERNEL);
if (!mcpdm) {
ret = -ENOMEM;
goto exit;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no resource\n");
goto err_resource;
}
spin_lock_init(&mcpdm->lock);
mcpdm->free = 1;
mcpdm->io_base = ioremap(res->start, resource_size(res));
if (!mcpdm->io_base) {
ret = -ENOMEM;
goto err_resource;
}
mcpdm->irq = platform_get_irq(pdev, 0);
mcpdm->clk = clk_get(&pdev->dev, "pdm_ck");
if (IS_ERR(mcpdm->clk)) {
ret = PTR_ERR(mcpdm->clk);
dev_err(&pdev->dev, "unable to get pdm_ck: %d\n", ret);
goto err_clk;
}
mcpdm->dev = &pdev->dev;
platform_set_drvdata(pdev, mcpdm);
return 0;
err_clk:
iounmap(mcpdm->io_base);
err_resource:
kfree(mcpdm);
exit:
return ret;
}
int __devexit omap_mcpdm_remove(struct platform_device *pdev)
{
struct omap_mcpdm *mcpdm_ptr = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
clk_put(mcpdm_ptr->clk);
iounmap(mcpdm_ptr->io_base);
mcpdm_ptr->clk = NULL;
mcpdm_ptr->free = 0;
mcpdm_ptr->dev = NULL;
kfree(mcpdm_ptr);
return 0;
}
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