litmus-rt.git - The LITMUS^RT kernel.

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author	Linus Torvalds <torvalds@linux-foundation.org>	2010-05-18 11:17:58 -0400
committer	Linus Torvalds <torvalds@linux-foundation.org>	2010-05-18 11:17:58 -0400
commit	f262af3d08d3fffc4e11277d3a177b2d67ea2aba (patch)
tree	cf5e4ac1bc39fe46cfbf4d17a0e9c71ee43b9728 /include/linux/console_struct.h
parent	1014cfe2fb4cdd663137aafb21448cb613dd6a7d (diff)
parent	72d5a9f7a9542f88397558c65bcfc3b115a65e34 (diff)

Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits) rcu: remove all rcu head initializations, except on_stack initializations rcu head introduce rcu head init on stack Debugobjects transition check rcu: fix build bug in RCU_FAST_NO_HZ builds rcu: RCU_FAST_NO_HZ must check RCU dyntick state rcu: make SRCU usable in modules rcu: improve the RCU CPU-stall warning documentation rcu: reduce the number of spurious RCU_SOFTIRQ invocations rcu: permit discontiguous cpu_possible_mask CPU numbering rcu: improve RCU CPU stall-warning messages rcu: print boot-time console messages if RCU configs out of ordinary rcu: disable CPU stall warnings upon panic rcu: enable CPU_STALL_VERBOSE by default rcu: slim down rcutiny by removing rcu_scheduler_active and friends rcu: refactor RCU's context-switch handling rcu: rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk rcu: shrink rcutiny by making synchronize_rcu_bh() be inline rcu: fix now-bogus rcu_scheduler_active comments. rcu: Fix bogus CONFIG_PROVE_LOCKING in comments to reflect reality. rcu: ignore offline CPUs in last non-dyntick-idle CPU check ...

Diffstat (limited to 'include/linux/console_struct.h')

0 files changed, 0 insertions, 0 deletions

/* * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip. * * Author: Nicolas Pitre * Created: Dec 02, 2004 * Copyright: MontaVista Software 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. */ #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/wait.h> #include <linux/delay.h> #include <sound/driver.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #include <asm/irq.h> #include <asm/semaphore.h> #include <asm/hardware.h> #include <asm/arch/pxa-regs.h> #include <asm/arch/audio.h> #include "pxa2xx-pcm.h" static DECLARE_MUTEX(car_mutex); static DECLARE_WAIT_QUEUE_HEAD(gsr_wq); static volatile long gsr_bits; /* * Beware PXA27x bugs: * * o Slot 12 read from modem space will hang controller. * o CDONE, SDONE interrupt fails after any slot 12 IO. * * We therefore have an hybrid approach for waiting on SDONE (interrupt or * 1 jiffy timeout if interrupt never comes). */ static unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg) { unsigned short val = -1; volatile u32 *reg_addr; down(&car_mutex); /* set up primary or secondary codec space */ reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE; reg_addr += (reg >> 1); /* start read access across the ac97 link */ GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; val = *reg_addr; if (reg == AC97_GPIO_STATUS) goto out; if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1) <= 0 && !((GSR | gsr_bits) & GSR_SDONE)) { printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n", __FUNCTION__, reg, GSR | gsr_bits); val = -1; goto out; } /* valid data now */ GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; val = *reg_addr; /* but we've just started another cycle... */ wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_SDONE, 1); out: up(&car_mutex); return val; } static void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { volatile u32 *reg_addr; down(&car_mutex); /* set up primary or secondary codec space */ reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE; reg_addr += (reg >> 1); GSR = GSR_CDONE | GSR_SDONE; gsr_bits = 0; *reg_addr = val; if (wait_event_timeout(gsr_wq, (GSR | gsr_bits) & GSR_CDONE, 1) <= 0 && !((GSR | gsr_bits) & GSR_CDONE)) printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n", __FUNCTION__, reg, GSR | gsr_bits); up(&car_mutex); } static void pxa2xx_ac97_reset(struct snd_ac97 *ac97) { /* First, try cold reset */ GCR &= GCR_COLD_RST; /* clear everything but nCRST */ GCR &= ~GCR_COLD_RST; /* then assert nCRST */ gsr_bits = 0; #ifdef CONFIG_PXA27x /* PXA27x Developers Manual section 13.5.2.2.1 */ pxa_set_cken(1 << 31, 1); udelay(5); pxa_set_cken(1 << 31, 0); GCR = GCR_COLD_RST; udelay(50); #else GCR = GCR_COLD_RST; GCR |= GCR_CDONE_IE|GCR_SDONE_IE; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); #endif if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) { printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n", __FUNCTION__, gsr_bits); /* let's try warm reset */ gsr_bits = 0; #ifdef CONFIG_PXA27x /* warm reset broken on Bulverde, so manually keep AC97 reset high */ pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH); udelay(10); GCR |= GCR_WARM_RST; pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT); udelay(500); #else GCR |= GCR_WARM_RST|GCR_PRIRDY_IEN|GCR_SECRDY_IEN; wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1); #endif if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n", __FUNCTION__, gsr_bits); } GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); GCR |= GCR_SDONE_IE|GCR_CDONE_IE; } static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id, struct pt_regs *regs) { long status; status = GSR; if (status) { GSR = status; gsr_bits |= status; wake_up(&gsr_wq); #ifdef CONFIG_PXA27x /* Although we don't use those we still need to clear them since they tend to spuriously trigger when MMC is used (hardware bug? go figure)... */ MISR = MISR_EOC; PISR = PISR_EOC; MCSR = MCSR_EOC; #endif return IRQ_HANDLED; } return IRQ_NONE; } static struct snd_ac97_bus_ops pxa2xx_ac97_ops = { .read = pxa2xx_ac97_read, .write = pxa2xx_ac97_write, .reset = pxa2xx_ac97_reset, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_out = { .name = "AC97 PCM out", .dev_addr = __PREG(PCDR), .drcmr = &DRCMRTXPCDR, .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_BURST32 | DCMD_WIDTH4, }; static struct pxa2xx_pcm_dma_params pxa2xx_ac97_pcm_in = { .name = "AC97 PCM in", .dev_addr = __PREG(PCDR), .drcmr = &DRCMRRXPCDR, .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_BURST32 | DCMD_WIDTH4, }; static struct snd_pcm *pxa2xx_ac97_pcm; static struct snd_ac97 *pxa2xx_ac97_ac97; static int pxa2xx_ac97_pcm_startup(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; pxa2xx_audio_ops_t *platform_ops; int r; runtime->hw.channels_min = 2; runtime->hw.channels_max = 2; r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? AC97_RATES_FRONT_DAC : AC97_RATES_ADC; runtime->hw.rates = pxa2xx_ac97_ac97->rates[r]; snd_pcm_limit_hw_rates(runtime); platform_ops = substream->pcm->card->dev->platform_data; if (platform_ops && platform_ops->startup) return platform_ops->startup(substream, platform_ops->priv); else return 0; } static void pxa2xx_ac97_pcm_shutdown(struct snd_pcm_substream *substream) { pxa2xx_audio_ops_t *platform_ops; platform_ops = substream->pcm->card->dev->platform_data; if (platform_ops && platform_ops->shutdown) platform_ops->shutdown(substream, platform_ops->priv); } static int pxa2xx_ac97_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate); } static struct pxa2xx_pcm_client pxa2xx_ac97_pcm_client = { .playback_params = &pxa2xx_ac97_pcm_out, .capture_params = &pxa2xx_ac97_pcm_in, .startup = pxa2xx_ac97_pcm_startup, .shutdown = pxa2xx_ac97_pcm_shutdown, .prepare = pxa2xx_ac97_pcm_prepare, }; #ifdef CONFIG_PM static int pxa2xx_ac97_do_suspend(struct snd_card *card, pm_message_t state) { pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); snd_pcm_suspend_all(pxa2xx_ac97_pcm); snd_ac97_suspend(pxa2xx_ac97_ac97); if (platform_ops && platform_ops->suspend) platform_ops->suspend(platform_ops->priv); GCR |= GCR_ACLINK_OFF; pxa_set_cken(CKEN2_AC97, 0); return 0; } static int pxa2xx_ac97_do_resume(struct snd_card *card) { pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data; pxa_set_cken(CKEN2_AC97, 1); if (platform_ops && platform_ops->resume) platform_ops->resume(platform_ops->priv); snd_ac97_resume(pxa2xx_ac97_ac97); snd_power_change_state(card, SNDRV_CTL_POWER_D0); return 0; } static int pxa2xx_ac97_suspend(struct platform_device *dev, pm_message_t state) { struct snd_card *card = platform_get_drvdata(dev); int ret = 0; if (card) ret = pxa2xx_ac97_do_suspend(card, PMSG_SUSPEND); return ret; } static int pxa2xx_ac97_resume(struct platform_device *dev) { struct snd_card *card = platform_get_drvdata(dev); int ret = 0; if (card) ret = pxa2xx_ac97_do_resume(card); return ret; } #else #define pxa2xx_ac97_suspend NULL #define pxa2xx_ac97_resume NULL #endif static int pxa2xx_ac97_probe(struct platform_device *dev) { struct snd_card *card; struct snd_ac97_bus *ac97_bus; struct snd_ac97_template ac97_template; int ret; ret = -ENOMEM; card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, THIS_MODULE, 0); if (!card) goto err; card->dev = &dev->dev; strncpy(card->driver, dev->dev.driver->name, sizeof(card->driver)); ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm); if (ret) goto err; ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL); if (ret < 0) goto err; pxa_gpio_mode(GPIO31_SYNC_AC97_MD); pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD); pxa_gpio_mode(GPIO28_BITCLK_AC97_MD); pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD); #ifdef CONFIG_PXA27x /* Use GPIO 113 as AC97 Reset on Bulverde */ pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT); #endif pxa_set_cken(CKEN2_AC97, 1); ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus); if (ret) goto err; memset(&ac97_template, 0, sizeof(ac97_template)); ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97); if (ret) goto err; snprintf(card->shortname, sizeof(card->shortname), "%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97)); snprintf(card->longname, sizeof(card->longname), "%s (%s)", dev->dev.driver->name, card->mixername); ret = snd_card_register(card); if (ret == 0) { platform_set_drvdata(dev, card); return 0; } err: if (card) snd_card_free(card); if (CKEN & CKEN2_AC97) { GCR |= GCR_ACLINK_OFF; free_irq(IRQ_AC97, NULL); pxa_set_cken(CKEN2_AC97, 0); } return ret; } static int pxa2xx_ac97_remove(struct platform_device *dev) { struct snd_card *card = platform_get_drvdata(dev); if (card) { snd_card_free(card); platform_set_drvdata(dev, NULL); GCR |= GCR_ACLINK_OFF; free_irq(IRQ_AC97, NULL); pxa_set_cken(CKEN2_AC97, 0); } return 0; } static struct platform_driver pxa2xx_ac97_driver = { .probe = pxa2xx_ac97_probe, .remove = pxa2xx_ac97_remove, .suspend = pxa2xx_ac97_suspend, .resume = pxa2xx_ac97_resume, .driver = { .name = "pxa2xx-ac97", }, }; static int __init pxa2xx_ac97_init(void) { return platform_driver_register(&pxa2xx_ac97_driver); } static void __exit pxa2xx_ac97_exit(void) { platform_driver_unregister(&pxa2xx_ac97_driver); } module_init(pxa2xx_ac97_init); module_exit(pxa2xx_ac97_exit); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip"); MODULE_LICENSE("GPL");


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