forked from luck/tmp_suning_uos_patched
5a0e3ad6af
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
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* Power management for audio on multifunction CS5535 companion device
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* Copyright (C) Jaya Kumar
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/initval.h>
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#include <sound/asoundef.h>
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#include <sound/pcm.h>
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#include <sound/ac97_codec.h>
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#include "cs5535audio.h"
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static void snd_cs5535audio_stop_hardware(struct cs5535audio *cs5535au)
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{
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/*
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we depend on snd_ac97_suspend to tell the
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AC97 codec to shutdown. the amd spec suggests
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that the LNK_SHUTDOWN be done at the same time
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that the codec power-down is issued. instead,
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we do it just after rather than at the same
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time. excluding codec specific build_ops->suspend
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ac97 powerdown hits:
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0x8000 EAPD
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0x4000 Headphone amplifier
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0x0300 ADC & DAC
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0x0400 Analog Mixer powerdown (Vref on)
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I am not sure if this is the best that we can do.
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The remainder to be investigated are:
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- analog mixer (vref off) 0x0800
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- AC-link powerdown 0x1000
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- codec internal clock 0x2000
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*/
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/* set LNK_SHUTDOWN to shutdown AC link */
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cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_SHUTDOWN);
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}
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int snd_cs5535audio_suspend(struct pci_dev *pci, pm_message_t state)
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{
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struct snd_card *card = pci_get_drvdata(pci);
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struct cs5535audio *cs5535au = card->private_data;
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int i;
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snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
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snd_pcm_suspend_all(cs5535au->pcm);
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snd_ac97_suspend(cs5535au->ac97);
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for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
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struct cs5535audio_dma *dma = &cs5535au->dmas[i];
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if (dma && dma->substream)
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dma->saved_prd = dma->ops->read_prd(cs5535au);
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}
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/* save important regs, then disable aclink in hw */
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snd_cs5535audio_stop_hardware(cs5535au);
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if (pci_save_state(pci)) {
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printk(KERN_ERR "cs5535audio: pci_save_state failed!\n");
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return -EIO;
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}
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pci_disable_device(pci);
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pci_set_power_state(pci, pci_choose_state(pci, state));
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return 0;
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}
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int snd_cs5535audio_resume(struct pci_dev *pci)
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{
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struct snd_card *card = pci_get_drvdata(pci);
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struct cs5535audio *cs5535au = card->private_data;
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u32 tmp;
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int timeout;
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int i;
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pci_set_power_state(pci, PCI_D0);
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if (pci_restore_state(pci) < 0) {
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printk(KERN_ERR "cs5535audio: pci_restore_state failed, "
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"disabling device\n");
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snd_card_disconnect(card);
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return -EIO;
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}
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if (pci_enable_device(pci) < 0) {
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printk(KERN_ERR "cs5535audio: pci_enable_device failed, "
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"disabling device\n");
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snd_card_disconnect(card);
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return -EIO;
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}
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pci_set_master(pci);
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/* set LNK_WRM_RST to reset AC link */
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cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);
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timeout = 50;
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do {
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tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
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if (tmp & PRM_RDY_STS)
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break;
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udelay(1);
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} while (--timeout);
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if (!timeout)
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snd_printk(KERN_ERR "Failure getting AC Link ready\n");
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/* set up rate regs, dma. actual initiation is done in trig */
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for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
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struct cs5535audio_dma *dma = &cs5535au->dmas[i];
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if (dma && dma->substream) {
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dma->substream->ops->prepare(dma->substream);
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dma->ops->setup_prd(cs5535au, dma->saved_prd);
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}
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}
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/* we depend on ac97 to perform the codec power up */
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snd_ac97_resume(cs5535au->ac97);
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snd_power_change_state(card, SNDRV_CTL_POWER_D0);
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return 0;
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}
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