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e6b5be2be4
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
236 lines
6.2 KiB
C
236 lines
6.2 KiB
C
/*
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* TXx9 ACLC AC97 driver
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*
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* Copyright (C) 2009 Atsushi Nemoto
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*
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* Based on RBTX49xx patch from CELF patch archive.
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* (C) Copyright TOSHIBA CORPORATION 2004-2006
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/gfp.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include "txx9aclc.h"
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#define AC97_DIR \
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(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
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#define AC97_RATES \
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SNDRV_PCM_RATE_8000_48000
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#ifdef __BIG_ENDIAN
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#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_BE
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#else
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#define AC97_FMTS SNDRV_PCM_FMTBIT_S16_LE
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#endif
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static DECLARE_WAIT_QUEUE_HEAD(ac97_waitq);
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/* REVISIT: How to find txx9aclc_drvdata from snd_ac97? */
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static struct txx9aclc_plat_drvdata *txx9aclc_drvdata;
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static int txx9aclc_regready(struct txx9aclc_plat_drvdata *drvdata)
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{
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return __raw_readl(drvdata->base + ACINTSTS) & ACINT_REGACCRDY;
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}
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/* AC97 controller reads codec register */
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static unsigned short txx9aclc_ac97_read(struct snd_ac97 *ac97,
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unsigned short reg)
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{
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struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
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void __iomem *base = drvdata->base;
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u32 dat;
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if (!(__raw_readl(base + ACINTSTS) & ACINT_CODECRDY(ac97->num)))
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return 0xffff;
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reg |= ac97->num << 7;
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dat = (reg << ACREGACC_REG_SHIFT) | ACREGACC_READ;
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__raw_writel(dat, base + ACREGACC);
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__raw_writel(ACINT_REGACCRDY, base + ACINTEN);
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if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
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__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
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printk(KERN_ERR "ac97 read timeout (reg %#x)\n", reg);
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dat = 0xffff;
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goto done;
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}
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dat = __raw_readl(base + ACREGACC);
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if (((dat >> ACREGACC_REG_SHIFT) & 0xff) != reg) {
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printk(KERN_ERR "reg mismatch %x with %x\n",
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dat, reg);
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dat = 0xffff;
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goto done;
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}
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dat = (dat >> ACREGACC_DAT_SHIFT) & 0xffff;
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done:
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__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
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return dat;
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}
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/* AC97 controller writes to codec register */
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static void txx9aclc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
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unsigned short val)
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{
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struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
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void __iomem *base = drvdata->base;
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__raw_writel(((reg | (ac97->num << 7)) << ACREGACC_REG_SHIFT) |
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(val << ACREGACC_DAT_SHIFT),
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base + ACREGACC);
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__raw_writel(ACINT_REGACCRDY, base + ACINTEN);
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if (!wait_event_timeout(ac97_waitq, txx9aclc_regready(txx9aclc_drvdata), HZ)) {
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printk(KERN_ERR
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"ac97 write timeout (reg %#x)\n", reg);
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}
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__raw_writel(ACINT_REGACCRDY, base + ACINTDIS);
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}
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static void txx9aclc_ac97_cold_reset(struct snd_ac97 *ac97)
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{
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struct txx9aclc_plat_drvdata *drvdata = txx9aclc_drvdata;
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void __iomem *base = drvdata->base;
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u32 ready = ACINT_CODECRDY(ac97->num) | ACINT_REGACCRDY;
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__raw_writel(ACCTL_ENLINK, base + ACCTLDIS);
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mmiowb();
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udelay(1);
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__raw_writel(ACCTL_ENLINK, base + ACCTLEN);
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/* wait for primary codec ready status */
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__raw_writel(ready, base + ACINTEN);
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if (!wait_event_timeout(ac97_waitq,
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(__raw_readl(base + ACINTSTS) & ready) == ready,
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HZ)) {
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dev_err(&ac97->dev, "primary codec is not ready "
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"(status %#x)\n",
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__raw_readl(base + ACINTSTS));
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}
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__raw_writel(ACINT_REGACCRDY, base + ACINTSTS);
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__raw_writel(ready, base + ACINTDIS);
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}
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/* AC97 controller operations */
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static struct snd_ac97_bus_ops txx9aclc_ac97_ops = {
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.read = txx9aclc_ac97_read,
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.write = txx9aclc_ac97_write,
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.reset = txx9aclc_ac97_cold_reset,
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};
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static irqreturn_t txx9aclc_ac97_irq(int irq, void *dev_id)
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{
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struct txx9aclc_plat_drvdata *drvdata = dev_id;
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void __iomem *base = drvdata->base;
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__raw_writel(__raw_readl(base + ACINTMSTS), base + ACINTDIS);
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wake_up(&ac97_waitq);
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return IRQ_HANDLED;
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}
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static int txx9aclc_ac97_probe(struct snd_soc_dai *dai)
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{
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txx9aclc_drvdata = snd_soc_dai_get_drvdata(dai);
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return 0;
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}
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static int txx9aclc_ac97_remove(struct snd_soc_dai *dai)
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{
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struct txx9aclc_plat_drvdata *drvdata = snd_soc_dai_get_drvdata(dai);
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/* disable AC-link */
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__raw_writel(ACCTL_ENLINK, drvdata->base + ACCTLDIS);
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txx9aclc_drvdata = NULL;
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return 0;
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}
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static struct snd_soc_dai_driver txx9aclc_ac97_dai = {
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.bus_control = true,
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.probe = txx9aclc_ac97_probe,
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.remove = txx9aclc_ac97_remove,
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.playback = {
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.rates = AC97_RATES,
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.formats = AC97_FMTS,
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.channels_min = 2,
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.channels_max = 2,
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},
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.capture = {
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.rates = AC97_RATES,
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.formats = AC97_FMTS,
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.channels_min = 2,
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.channels_max = 2,
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},
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};
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static const struct snd_soc_component_driver txx9aclc_ac97_component = {
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.name = "txx9aclc-ac97",
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};
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static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
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{
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struct txx9aclc_plat_drvdata *drvdata;
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struct resource *r;
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int err;
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int irq;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata)
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return -ENOMEM;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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drvdata->base = devm_ioremap_resource(&pdev->dev, r);
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if (IS_ERR(drvdata->base))
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return PTR_ERR(drvdata->base);
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platform_set_drvdata(pdev, drvdata);
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drvdata->physbase = r->start;
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if (sizeof(drvdata->physbase) > sizeof(r->start) &&
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r->start >= TXX9_DIRECTMAP_BASE &&
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r->start < TXX9_DIRECTMAP_BASE + 0x400000)
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drvdata->physbase |= 0xf00000000ull;
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err = devm_request_irq(&pdev->dev, irq, txx9aclc_ac97_irq,
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0, dev_name(&pdev->dev), drvdata);
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if (err < 0)
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return err;
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err = snd_soc_set_ac97_ops(&txx9aclc_ac97_ops);
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if (err < 0)
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return err;
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return snd_soc_register_component(&pdev->dev, &txx9aclc_ac97_component,
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&txx9aclc_ac97_dai, 1);
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}
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static int txx9aclc_ac97_dev_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_component(&pdev->dev);
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snd_soc_set_ac97_ops(NULL);
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return 0;
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}
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static struct platform_driver txx9aclc_ac97_driver = {
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.probe = txx9aclc_ac97_dev_probe,
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.remove = txx9aclc_ac97_dev_remove,
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.driver = {
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.name = "txx9aclc-ac97",
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},
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};
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module_platform_driver(txx9aclc_ac97_driver);
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MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
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MODULE_DESCRIPTION("TXx9 ACLC AC97 driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:txx9aclc-ac97");
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