linux/drivers/misc/atmel-ssc.c
Linus Torvalds 046e7d685b Sound updates for 3.8-rc1
This update contains a fairly wide range of changes all over in sound
 subdirectory, mainly because of UAPI header moves by David and __dev*
 annotation removals by Bill.  Other highlights are:
 
 - Introduced the support for wallclock timestamps in ALSA PCM core
 
 - Add the poll loop implementation for HD-audio jack detection
 
 - Yet more VGA-switcheroo fixes for HD-audio
 
 - New VIA HD-audio codec support
 
 - More fixes on resource management in USB audio and MIDI drivers
 
 - More quirks for USB-audio ASUS Xonar U3, Reloop Play,  Focusrite,
   Roland VG-99, etc
 
 - Add support for FastTrack C400 usb-audio
 
 - Clean ups in many drivers regarding firmware loading
 
 - Add PSC724 Ultiimate Edge support to ice1712
 
 - A few hdspm driver updates
 
 - New Stanton SCS.1d/1m FireWire driver
 
 - Standardisation of the logging in ASoC codes
 
 - DT and dmaengine support for ASoC Atmel
 
 - Support for Wolfson ADSP cores
 
 - New drivers for Freescale/iVeia P1022 and Maxim MAX98090
 
 - Lots of other ASoC driver fixes and developments
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Merge tag 'sound-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "This update contains a fairly wide range of changes all over in sound
  subdirectory, mainly because of UAPI header moves by David and __dev*
  annotation removals by Bill.  Other highlights are:

   - Introduced the support for wallclock timestamps in ALSA PCM core

   - Add the poll loop implementation for HD-audio jack detection

   - Yet more VGA-switcheroo fixes for HD-audio

   - New VIA HD-audio codec support

   - More fixes on resource management in USB audio and MIDI drivers

   - More quirks for USB-audio ASUS Xonar U3, Reloop Play, Focusrite,
     Roland VG-99, etc

   - Add support for FastTrack C400 usb-audio

   - Clean ups in many drivers regarding firmware loading

   - Add PSC724 Ultiimate Edge support to ice1712

   - A few hdspm driver updates

   - New Stanton SCS.1d/1m FireWire driver

   - Standardisation of the logging in ASoC codes

   - DT and dmaengine support for ASoC Atmel

   - Support for Wolfson ADSP cores

   - New drivers for Freescale/iVeia P1022 and Maxim MAX98090

   - Lots of other ASoC driver fixes and developments"

Fix up trivial conflicts.  And go out on a limb and assume the dts file
'status' field of one of the conflicting things was supposed to be
"disabled", not "disable" like in pretty much all other cases.

* tag 'sound-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (341 commits)
  ALSA: hda - Move runtime PM check to runtime_idle callback
  ALSA: hda - Add stereo-dmic fixup for Acer Aspire One 522
  ALSA: hda - Avoid doubly suspend after vga switcheroo
  ALSA: usb-audio: Enable S/PDIF on the ASUS Xonar U3
  ALSA: hda - Check validity of CORB/RIRB WP reads
  ALSA: hda - use usleep_range in link reset and change timeout check
  ALSA: HDA: VIA: Add support for codec VT1808.
  ALSA: HDA: VIA Add support for codec VT1705CF.
  ASoC: codecs: remove __dev* attributes
  ASoC: utils: remove __dev* attributes
  ASoC: ux500: remove __dev* attributes
  ASoC: txx9: remove __dev* attributes
  ASoC: tegra: remove __dev* attributes
  ASoC: spear: remove __dev* attributes
  ASoC: sh: remove __dev* attributes
  ASoC: s6000: remove __dev* attributes
  ASoC: OMAP: remove __dev* attributes
  ASoC: nuc900: remove __dev* attributes
  ASoC: mxs: remove __dev* attributes
  ASoC: kirkwood: remove __dev* attributes
  ...
2012-12-13 11:51:23 -08:00

219 lines
4.7 KiB
C

/*
* Atmel SSC driver
*
* Copyright (C) 2007 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/platform_device.h>
#include <linux/list.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/atmel-ssc.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
/* Serialize access to ssc_list and user count */
static DEFINE_SPINLOCK(user_lock);
static LIST_HEAD(ssc_list);
struct ssc_device *ssc_request(unsigned int ssc_num)
{
int ssc_valid = 0;
struct ssc_device *ssc;
spin_lock(&user_lock);
list_for_each_entry(ssc, &ssc_list, list) {
if (ssc->pdev->dev.of_node) {
if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc")
== ssc_num) {
ssc_valid = 1;
break;
}
} else if (ssc->pdev->id == ssc_num) {
ssc_valid = 1;
break;
}
}
if (!ssc_valid) {
spin_unlock(&user_lock);
pr_err("ssc: ssc%d platform device is missing\n", ssc_num);
return ERR_PTR(-ENODEV);
}
if (ssc->user) {
spin_unlock(&user_lock);
dev_dbg(&ssc->pdev->dev, "module busy\n");
return ERR_PTR(-EBUSY);
}
ssc->user++;
spin_unlock(&user_lock);
clk_enable(ssc->clk);
return ssc;
}
EXPORT_SYMBOL(ssc_request);
void ssc_free(struct ssc_device *ssc)
{
spin_lock(&user_lock);
if (ssc->user) {
ssc->user--;
clk_disable(ssc->clk);
} else {
dev_dbg(&ssc->pdev->dev, "device already free\n");
}
spin_unlock(&user_lock);
}
EXPORT_SYMBOL(ssc_free);
static struct atmel_ssc_platform_data at91rm9200_config = {
.use_dma = 0,
};
static struct atmel_ssc_platform_data at91sam9g45_config = {
.use_dma = 1,
};
static const struct platform_device_id atmel_ssc_devtypes[] = {
{
.name = "at91rm9200_ssc",
.driver_data = (unsigned long) &at91rm9200_config,
}, {
.name = "at91sam9g45_ssc",
.driver_data = (unsigned long) &at91sam9g45_config,
}, {
/* sentinel */
}
};
#ifdef CONFIG_OF
static const struct of_device_id atmel_ssc_dt_ids[] = {
{
.compatible = "atmel,at91rm9200-ssc",
.data = &at91rm9200_config,
}, {
.compatible = "atmel,at91sam9g45-ssc",
.data = &at91sam9g45_config,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, atmel_ssc_dt_ids);
#endif
static inline const struct atmel_ssc_platform_data * __init
atmel_ssc_get_driver_data(struct platform_device *pdev)
{
if (pdev->dev.of_node) {
const struct of_device_id *match;
match = of_match_node(atmel_ssc_dt_ids, pdev->dev.of_node);
if (match == NULL)
return NULL;
return match->data;
}
return (struct atmel_ssc_platform_data *)
platform_get_device_id(pdev)->driver_data;
}
static int ssc_probe(struct platform_device *pdev)
{
struct resource *regs;
struct ssc_device *ssc;
const struct atmel_ssc_platform_data *plat_dat;
ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);
if (!ssc) {
dev_dbg(&pdev->dev, "out of memory\n");
return -ENOMEM;
}
ssc->pdev = pdev;
plat_dat = atmel_ssc_get_driver_data(pdev);
if (!plat_dat)
return -ENODEV;
ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_dbg(&pdev->dev, "no mmio resource defined\n");
return -ENXIO;
}
ssc->regs = devm_request_and_ioremap(&pdev->dev, regs);
if (!ssc->regs) {
dev_dbg(&pdev->dev, "ioremap failed\n");
return -EINVAL;
}
ssc->phybase = regs->start;
ssc->clk = devm_clk_get(&pdev->dev, "pclk");
if (IS_ERR(ssc->clk)) {
dev_dbg(&pdev->dev, "no pclk clock defined\n");
return -ENXIO;
}
/* disable all interrupts */
clk_enable(ssc->clk);
ssc_writel(ssc->regs, IDR, ~0UL);
ssc_readl(ssc->regs, SR);
clk_disable(ssc->clk);
ssc->irq = platform_get_irq(pdev, 0);
if (!ssc->irq) {
dev_dbg(&pdev->dev, "could not get irq\n");
return -ENXIO;
}
spin_lock(&user_lock);
list_add_tail(&ssc->list, &ssc_list);
spin_unlock(&user_lock);
platform_set_drvdata(pdev, ssc);
dev_info(&pdev->dev, "Atmel SSC device at 0x%p (irq %d)\n",
ssc->regs, ssc->irq);
return 0;
}
static int ssc_remove(struct platform_device *pdev)
{
struct ssc_device *ssc = platform_get_drvdata(pdev);
spin_lock(&user_lock);
list_del(&ssc->list);
spin_unlock(&user_lock);
return 0;
}
static struct platform_driver ssc_driver = {
.driver = {
.name = "ssc",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(atmel_ssc_dt_ids),
},
.id_table = atmel_ssc_devtypes,
.probe = ssc_probe,
.remove = ssc_remove,
};
module_platform_driver(ssc_driver);
MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
MODULE_DESCRIPTION("SSC driver for Atmel AVR32 and AT91");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ssc");