forked from luck/tmp_suning_uos_patched
[ALSA] Add ARM PXA2xx AC97 driver
Documentation,ARM,/arm/Makefile,ARM PXA2XX driver Added ARM PXA2xx AC97 driver by Nicolas Pitre (moved from alsa-driver tree). Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
1bd9debf25
commit
2c484df0d2
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@ -1059,6 +1059,13 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
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The power-management is supported.
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Module snd-pxa2xx-ac97 (on arm only)
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------------------------------------
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Module for AC97 driver for the Intel PXA2xx chip
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For ARM architecture only.
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Module snd-rme32
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----------------
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@ -20,5 +20,17 @@ config SND_ARMAACI
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select SND_PCM
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select SND_AC97_CODEC
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endmenu
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config SND_PXA2XX_PCM
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tristate
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select SND_PCM
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config SND_PXA2XX_AC97
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tristate "AC97 driver for the Intel PXA2xx chip"
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depends on ARCH_PXA && SND
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select SND_PXA2XX_PCM
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select SND_AC97_CODEC
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help
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Say Y or M if you want to support any AC97 codec attached to
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the PXA2xx AC97 interface.
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endmenu
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@ -3,9 +3,11 @@
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#
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snd-sa11xx-uda1341-objs := sa11xx-uda1341.o
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# Toplevel Module Dependency
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obj-$(CONFIG_SND_SA11XX_UDA1341) += snd-sa11xx-uda1341.o
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obj-$(CONFIG_SND_ARMAACI) += snd-aaci.o
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snd-aaci-objs := aaci.o devdma.o
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snd-pxa2xx-pcm-objs := pxa2xx-pcm.o
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snd-pxa2xx-ac97-objs := pxa2xx-ac97.o
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obj-$(CONFIG_SND_SA11XX_UDA1341) += snd-sa11xx-uda1341.o
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obj-$(CONFIG_SND_ARMAACI) += snd-aaci.o
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obj-$(CONFIG_SND_PXA2XX_PCM) += snd-pxa2xx-pcm.o
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obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o
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410
sound/arm/pxa2xx-ac97.c
Normal file
410
sound/arm/pxa2xx-ac97.c
Normal file
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@ -0,0 +1,410 @@
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/*
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* linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
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*
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* Author: Nicolas Pitre
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* Created: Dec 02, 2004
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* Copyright: MontaVista Software Inc.
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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/kernel.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <sound/driver.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/ac97_codec.h>
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#include <sound/initval.h>
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#include <asm/irq.h>
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#include <asm/semaphore.h>
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#include <asm/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/audio.h>
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#include "pxa2xx-pcm.h"
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static DECLARE_MUTEX(car_mutex);
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static DECLARE_WAIT_QUEUE_HEAD(gsr_wq);
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static volatile long gsr_bits;
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static unsigned short pxa2xx_ac97_read(ac97_t *ac97, unsigned short reg)
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{
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unsigned short val = -1;
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volatile u32 *reg_addr;
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down(&car_mutex);
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if (CAR & CAR_CAIP) {
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printk(KERN_CRIT"%s: CAR_CAIP already set\n", __FUNCTION__);
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goto out;
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}
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/* set up primary or secondary codec space */
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reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE;
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reg_addr += (reg >> 1);
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/* start read access across the ac97 link */
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gsr_bits = 0;
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val = *reg_addr;
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if (reg == AC97_GPIO_STATUS)
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goto out;
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wait_event_timeout(gsr_wq, gsr_bits & GSR_SDONE, 1);
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if (!gsr_bits & GSR_SDONE) {
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printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n",
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__FUNCTION__, reg, gsr_bits);
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val = -1;
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goto out;
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}
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/* valid data now */
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gsr_bits = 0;
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val = *reg_addr;
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/* but we've just started another cycle... */
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wait_event_timeout(gsr_wq, gsr_bits & GSR_SDONE, 1);
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out: up(&car_mutex);
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return val;
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}
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static void pxa2xx_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
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{
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volatile u32 *reg_addr;
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down(&car_mutex);
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if (CAR & CAR_CAIP) {
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printk(KERN_CRIT "%s: CAR_CAIP already set\n", __FUNCTION__);
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goto out;
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}
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/* set up primary or secondary codec space */
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reg_addr = (ac97->num & 1) ? &SAC_REG_BASE : &PAC_REG_BASE;
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reg_addr += (reg >> 1);
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gsr_bits = 0;
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*reg_addr = val;
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wait_event_timeout(gsr_wq, gsr_bits & GSR_CDONE, 1);
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if (!gsr_bits & GSR_SDONE)
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printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n",
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__FUNCTION__, reg, gsr_bits);
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out: up(&car_mutex);
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}
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static void pxa2xx_ac97_reset(ac97_t *ac97)
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{
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/* First, try cold reset */
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GCR &= GCR_COLD_RST; /* clear everything but nCRST */
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GCR &= ~GCR_COLD_RST; /* then assert nCRST */
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gsr_bits = 0;
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#ifdef CONFIG_PXA27x
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/* PXA27x Developers Manual section 13.5.2.2.1 */
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pxa_set_cken(1 << 31, 1);
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udelay(5);
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pxa_set_cken(1 << 31, 0);
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GCR = GCR_COLD_RST;
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udelay(50);
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#else
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GCR = GCR_COLD_RST;
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GCR |= GCR_CDONE_IE|GCR_SDONE_IE;
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wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
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#endif
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if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR))) {
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printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n",
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__FUNCTION__, gsr_bits);
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/* let's try warm reset */
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gsr_bits = 0;
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#ifdef CONFIG_PXA27x
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/* warm reset broken on Bulverde,
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so manually keep AC97 reset high */
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pxa_gpio_mode(113 | GPIO_OUT | GPIO_DFLT_HIGH);
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udelay(10);
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GCR |= GCR_WARM_RST;
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pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
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udelay(50);
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#else
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GCR |= GCR_WARM_RST|GCR_PRIRDY_IEN|GCR_SECRDY_IEN;;
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wait_event_timeout(gsr_wq, gsr_bits & (GSR_PCR | GSR_SCR), 1);
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#endif
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if (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)))
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printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n",
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__FUNCTION__, gsr_bits);
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}
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GCR &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN);
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GCR |= GCR_SDONE_IE|GCR_CDONE_IE;
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}
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static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id, struct pt_regs *regs)
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{
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long status;
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status = GSR;
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if (status) {
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GSR = status;
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gsr_bits |= status;
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wake_up(&gsr_wq);
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#ifdef CONFIG_PXA27x
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/* Although we don't use those we still need to clear them
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since they tend to spuriously trigger when MMC is used
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(hardware bug? go figure)... */
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MISR = MISR_EOC;
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PISR = PISR_EOC;
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MCSR = MCSR_EOC;
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#endif
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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static ac97_bus_ops_t pxa2xx_ac97_ops = {
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.read = pxa2xx_ac97_read,
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.write = pxa2xx_ac97_write,
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.reset = pxa2xx_ac97_reset,
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};
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static pxa2xx_pcm_dma_params_t pxa2xx_ac97_pcm_out = {
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.name = "AC97 PCM out",
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.dev_addr = __PREG(PCDR),
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.drcmr = &DRCMRTXPCDR,
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.dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG |
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DCMD_BURST32 | DCMD_WIDTH4,
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};
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static pxa2xx_pcm_dma_params_t pxa2xx_ac97_pcm_in = {
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.name = "AC97 PCM in",
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.dev_addr = __PREG(PCDR),
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.drcmr = &DRCMRRXPCDR,
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.dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC |
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DCMD_BURST32 | DCMD_WIDTH4,
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};
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static snd_pcm_t *pxa2xx_ac97_pcm;
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static ac97_t *pxa2xx_ac97_ac97;
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static int pxa2xx_ac97_pcm_startup(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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pxa2xx_audio_ops_t *platform_ops;
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int r;
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runtime->hw.channels_min = 2;
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runtime->hw.channels_max = 2;
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r = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
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runtime->hw.rates = pxa2xx_ac97_ac97->rates[r];
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snd_pcm_limit_hw_rates(runtime);
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platform_ops = substream->pcm->card->dev->platform_data;
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if (platform_ops && platform_ops->startup)
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return platform_ops->startup(substream, platform_ops->priv);
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else
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return 0;
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}
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static void pxa2xx_ac97_pcm_shutdown(snd_pcm_substream_t *substream)
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{
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pxa2xx_audio_ops_t *platform_ops;
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platform_ops = substream->pcm->card->dev->platform_data;
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if (platform_ops && platform_ops->shutdown)
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platform_ops->shutdown(substream, platform_ops->priv);
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}
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static int pxa2xx_ac97_pcm_prepare(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
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AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
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return snd_ac97_set_rate(pxa2xx_ac97_ac97, reg, runtime->rate);
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}
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static pxa2xx_pcm_client_t pxa2xx_ac97_pcm_client = {
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.playback_params = &pxa2xx_ac97_pcm_out,
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.capture_params = &pxa2xx_ac97_pcm_in,
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.startup = pxa2xx_ac97_pcm_startup,
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.shutdown = pxa2xx_ac97_pcm_shutdown,
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.prepare = pxa2xx_ac97_pcm_prepare,
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};
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#ifdef CONFIG_PM
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static int pxa2xx_ac97_do_suspend(snd_card_t *card, unsigned int state)
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{
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if (card->power_state != SNDRV_CTL_POWER_D3cold) {
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pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
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snd_pcm_suspend_all(pxa2xx_ac97_pcm);
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snd_ac97_suspend(pxa2xx_ac97_ac97);
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snd_power_change_state(card, SNDRV_CTL_POWER_D3cold);
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if (platform_ops && platform_ops->suspend)
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platform_ops->suspend(platform_ops->priv);
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GCR |= GCR_ACLINK_OFF;
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pxa_set_cken(CKEN2_AC97, 0);
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}
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return 0;
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}
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static int pxa2xx_ac97_do_resume(snd_card_t *card, unsigned int state)
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{
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if (card->power_state != SNDRV_CTL_POWER_D0) {
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pxa2xx_audio_ops_t *platform_ops = card->dev->platform_data;
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pxa_set_cken(CKEN2_AC97, 1);
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if (platform_ops && platform_ops->resume)
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platform_ops->resume(platform_ops->priv);
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snd_ac97_resume(pxa2xx_ac97_ac97);
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snd_power_change_state(card, SNDRV_CTL_POWER_D0);
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}
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return 0;
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}
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static int pxa2xx_ac97_suspend(struct device *_dev, u32 state, u32 level)
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{
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snd_card_t *card = dev_get_drvdata(_dev);
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int ret = 0;
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if (card && level == SUSPEND_DISABLE)
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ret = pxa2xx_ac97_do_suspend(card, SNDRV_CTL_POWER_D3cold);
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return ret;
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}
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static int pxa2xx_ac97_resume(struct device *_dev, u32 level)
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{
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snd_card_t *card = dev_get_drvdata(_dev);
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int ret = 0;
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if (card && level == RESUME_ENABLE)
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ret = pxa2xx_ac97_do_resume(card, SNDRV_CTL_POWER_D0);
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return ret;
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}
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#else
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#define pxa2xx_ac97_suspend NULL
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#define pxa2xx_ac97_resume NULL
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#endif
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static int pxa2xx_ac97_probe(struct device *dev)
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{
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snd_card_t *card;
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ac97_bus_t *ac97_bus;
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ac97_template_t ac97_template;
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int ret;
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ret = -ENOMEM;
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card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
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THIS_MODULE, 0);
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if (!card)
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goto err;
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card->dev = dev;
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strncpy(card->driver, dev->driver->name, sizeof(card->driver));
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ret = pxa2xx_pcm_new(card, &pxa2xx_ac97_pcm_client, &pxa2xx_ac97_pcm);
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if (ret)
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goto err;
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ret = request_irq(IRQ_AC97, pxa2xx_ac97_irq, 0, "AC97", NULL);
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if (ret < 0)
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goto err;
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pxa_gpio_mode(GPIO31_SYNC_AC97_MD);
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pxa_gpio_mode(GPIO30_SDATA_OUT_AC97_MD);
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pxa_gpio_mode(GPIO28_BITCLK_AC97_MD);
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pxa_gpio_mode(GPIO29_SDATA_IN_AC97_MD);
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#ifdef CONFIG_PXA27x
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/* Use GPIO 113 as AC97 Reset on Bulverde */
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pxa_gpio_mode(113 | GPIO_ALT_FN_2_OUT);
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#endif
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pxa_set_cken(CKEN2_AC97, 1);
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ret = snd_ac97_bus(card, 0, &pxa2xx_ac97_ops, NULL, &ac97_bus);
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if (ret)
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goto err;
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memset(&ac97_template, 0, sizeof(ac97_template));
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ret = snd_ac97_mixer(ac97_bus, &ac97_template, &pxa2xx_ac97_ac97);
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if (ret)
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goto err;
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snprintf(card->shortname, sizeof(card->shortname),
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"%s", snd_ac97_get_short_name(pxa2xx_ac97_ac97));
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snprintf(card->longname, sizeof(card->longname),
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"%s (%s)", dev->driver->name, card->mixername);
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snd_card_set_pm_callback(card, pxa2xx_ac97_do_suspend,
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pxa2xx_ac97_do_resume, NULL);
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ret = snd_card_register(card);
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if (ret == 0) {
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dev_set_drvdata(dev, card);
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return 0;
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}
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err:
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if (card)
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snd_card_free(card);
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if (CKEN & CKEN2_AC97) {
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GCR |= GCR_ACLINK_OFF;
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free_irq(IRQ_AC97, NULL);
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pxa_set_cken(CKEN2_AC97, 0);
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}
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return ret;
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}
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static int pxa2xx_ac97_remove(struct device *dev)
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{
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snd_card_t *card = dev_get_drvdata(dev);
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if (card) {
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snd_card_free(card);
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dev_set_drvdata(dev, NULL);
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GCR |= GCR_ACLINK_OFF;
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free_irq(IRQ_AC97, NULL);
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pxa_set_cken(CKEN2_AC97, 0);
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}
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return 0;
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}
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|
||||
static struct device_driver pxa2xx_ac97_driver = {
|
||||
.name = "pxa2xx-ac97",
|
||||
.bus = &platform_bus_type,
|
||||
.probe = pxa2xx_ac97_probe,
|
||||
.remove = pxa2xx_ac97_remove,
|
||||
.suspend = pxa2xx_ac97_suspend,
|
||||
.resume = pxa2xx_ac97_resume,
|
||||
};
|
||||
|
||||
static int __init pxa2xx_ac97_init(void)
|
||||
{
|
||||
return driver_register(&pxa2xx_ac97_driver);
|
||||
}
|
||||
|
||||
static void __exit pxa2xx_ac97_exit(void)
|
||||
{
|
||||
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");
|
||||
367
sound/arm/pxa2xx-pcm.c
Normal file
367
sound/arm/pxa2xx-pcm.c
Normal file
|
|
@ -0,0 +1,367 @@
|
|||
/*
|
||||
* linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
|
||||
*
|
||||
* Author: Nicolas Pitre
|
||||
* Created: Nov 30, 2004
|
||||
* Copyright: (C) 2004 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/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include <sound/driver.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
|
||||
#include <asm/dma.h>
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/arch/pxa-regs.h>
|
||||
|
||||
#include "pxa2xx-pcm.h"
|
||||
|
||||
|
||||
static const snd_pcm_hardware_t pxa2xx_pcm_hardware = {
|
||||
.info = SNDRV_PCM_INFO_MMAP |
|
||||
SNDRV_PCM_INFO_MMAP_VALID |
|
||||
SNDRV_PCM_INFO_INTERLEAVED |
|
||||
SNDRV_PCM_INFO_PAUSE,
|
||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
||||
.period_bytes_min = 32,
|
||||
.period_bytes_max = 8192 - 32,
|
||||
.periods_min = 1,
|
||||
.periods_max = PAGE_SIZE/sizeof(pxa_dma_desc),
|
||||
.buffer_bytes_max = 128 * 1024,
|
||||
.fifo_size = 32,
|
||||
};
|
||||
|
||||
struct pxa2xx_runtime_data {
|
||||
int dma_ch;
|
||||
pxa2xx_pcm_dma_params_t *params;
|
||||
pxa_dma_desc *dma_desc_array;
|
||||
dma_addr_t dma_desc_array_phys;
|
||||
};
|
||||
|
||||
static int pxa2xx_pcm_hw_params(snd_pcm_substream_t *substream,
|
||||
snd_pcm_hw_params_t *params)
|
||||
{
|
||||
snd_pcm_runtime_t *runtime = substream->runtime;
|
||||
struct pxa2xx_runtime_data *rtd = runtime->private_data;
|
||||
size_t totsize = params_buffer_bytes(params);
|
||||
size_t period = params_period_bytes(params);
|
||||
pxa_dma_desc *dma_desc;
|
||||
dma_addr_t dma_buff_phys, next_desc_phys;
|
||||
|
||||
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
|
||||
runtime->dma_bytes = totsize;
|
||||
|
||||
dma_desc = rtd->dma_desc_array;
|
||||
next_desc_phys = rtd->dma_desc_array_phys;
|
||||
dma_buff_phys = runtime->dma_addr;
|
||||
do {
|
||||
next_desc_phys += sizeof(pxa_dma_desc);
|
||||
dma_desc->ddadr = next_desc_phys;
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
dma_desc->dsadr = dma_buff_phys;
|
||||
dma_desc->dtadr = rtd->params->dev_addr;
|
||||
} else {
|
||||
dma_desc->dsadr = rtd->params->dev_addr;
|
||||
dma_desc->dtadr = dma_buff_phys;
|
||||
}
|
||||
if (period > totsize)
|
||||
period = totsize;
|
||||
dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN;
|
||||
dma_desc++;
|
||||
dma_buff_phys += period;
|
||||
} while (totsize -= period);
|
||||
dma_desc[-1].ddadr = rtd->dma_desc_array_phys;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa2xx_pcm_hw_free(snd_pcm_substream_t *substream)
|
||||
{
|
||||
struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
|
||||
*rtd->params->drcmr = 0;
|
||||
snd_pcm_set_runtime_buffer(substream, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int pxa2xx_pcm_prepare(snd_pcm_substream_t *substream)
|
||||
{
|
||||
pxa2xx_pcm_client_t *client = substream->private_data;
|
||||
snd_pcm_runtime_t *runtime = substream->runtime;
|
||||
struct pxa2xx_runtime_data *rtd = runtime->private_data;
|
||||
|
||||
DCSR(rtd->dma_ch) &= ~DCSR_RUN;
|
||||
DCSR(rtd->dma_ch) = 0;
|
||||
DCMD(rtd->dma_ch) = 0;
|
||||
*rtd->params->drcmr = rtd->dma_ch | DRCMR_MAPVLD;
|
||||
|
||||
return client->prepare(substream);
|
||||
}
|
||||
|
||||
static int pxa2xx_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
|
||||
{
|
||||
struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
int ret = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
DDADR(rtd->dma_ch) = rtd->dma_desc_array_phys;
|
||||
DCSR(rtd->dma_ch) = DCSR_RUN;
|
||||
break;
|
||||
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
DCSR(rtd->dma_ch) &= ~DCSR_RUN;
|
||||
break;
|
||||
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
DCSR(rtd->dma_ch) |= DCSR_RUN;
|
||||
break;
|
||||
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id, struct pt_regs *regs)
|
||||
{
|
||||
snd_pcm_substream_t *substream = dev_id;
|
||||
struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
int dcsr;
|
||||
|
||||
dcsr = DCSR(dma_ch);
|
||||
DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN;
|
||||
|
||||
if (dcsr & DCSR_ENDINTR) {
|
||||
snd_pcm_period_elapsed(substream);
|
||||
} else {
|
||||
printk( KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
|
||||
rtd->params->name, dma_ch, dcsr );
|
||||
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
|
||||
}
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t pxa2xx_pcm_pointer(snd_pcm_substream_t *substream)
|
||||
{
|
||||
snd_pcm_runtime_t *runtime = substream->runtime;
|
||||
struct pxa2xx_runtime_data *rtd = runtime->private_data;
|
||||
dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
||||
DSADR(rtd->dma_ch) : DTADR(rtd->dma_ch);
|
||||
snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr);
|
||||
if (x == runtime->buffer_size)
|
||||
x = 0;
|
||||
return x;
|
||||
}
|
||||
|
||||
static int
|
||||
pxa2xx_pcm_hw_rule_mult32(snd_pcm_hw_params_t *params, snd_pcm_hw_rule_t *rule)
|
||||
{
|
||||
snd_interval_t *i = hw_param_interval(params, rule->var);
|
||||
int changed = 0;
|
||||
|
||||
if (i->min & 31) {
|
||||
i->min = (i->min & ~31) + 32;
|
||||
i->openmin = 0;
|
||||
changed = 1;
|
||||
}
|
||||
|
||||
if (i->max & 31) {
|
||||
i->max &= ~31;
|
||||
i->openmax = 0;
|
||||
changed = 1;
|
||||
}
|
||||
|
||||
return changed;
|
||||
}
|
||||
|
||||
static int pxa2xx_pcm_open(snd_pcm_substream_t *substream)
|
||||
{
|
||||
pxa2xx_pcm_client_t *client = substream->private_data;
|
||||
snd_pcm_runtime_t *runtime = substream->runtime;
|
||||
struct pxa2xx_runtime_data *rtd;
|
||||
int ret;
|
||||
|
||||
runtime->hw = pxa2xx_pcm_hardware;
|
||||
|
||||
/*
|
||||
* For mysterious reasons (and despite what the manual says)
|
||||
* playback samples are lost if the DMA count is not a multiple
|
||||
* of the DMA burst size. Let's add a rule to enforce that.
|
||||
*/
|
||||
ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
|
||||
pxa2xx_pcm_hw_rule_mult32, NULL,
|
||||
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, -1);
|
||||
if (ret)
|
||||
goto out;
|
||||
ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
|
||||
pxa2xx_pcm_hw_rule_mult32, NULL,
|
||||
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
ret = -ENOMEM;
|
||||
rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
|
||||
if (!rtd)
|
||||
goto out;
|
||||
rtd->dma_desc_array =
|
||||
dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE,
|
||||
&rtd->dma_desc_array_phys, GFP_KERNEL);
|
||||
if (!rtd->dma_desc_array)
|
||||
goto err1;
|
||||
|
||||
rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
||||
client->playback_params : client->capture_params;
|
||||
ret = pxa_request_dma(rtd->params->name, DMA_PRIO_LOW,
|
||||
pxa2xx_pcm_dma_irq, substream);
|
||||
if (ret < 0)
|
||||
goto err2;
|
||||
rtd->dma_ch = ret;
|
||||
|
||||
runtime->private_data = rtd;
|
||||
ret = client->startup(substream);
|
||||
if (!ret)
|
||||
goto out;
|
||||
|
||||
pxa_free_dma(rtd->dma_ch);
|
||||
err2:
|
||||
dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
|
||||
rtd->dma_desc_array, rtd->dma_desc_array_phys);
|
||||
err1:
|
||||
kfree(rtd);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int pxa2xx_pcm_close(snd_pcm_substream_t *substream)
|
||||
{
|
||||
pxa2xx_pcm_client_t *client = substream->private_data;
|
||||
struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
|
||||
|
||||
pxa_free_dma(rtd->dma_ch);
|
||||
client->shutdown(substream);
|
||||
dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE,
|
||||
rtd->dma_desc_array, rtd->dma_desc_array_phys);
|
||||
kfree(rtd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
pxa2xx_pcm_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *vma)
|
||||
{
|
||||
snd_pcm_runtime_t *runtime = substream->runtime;
|
||||
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
|
||||
runtime->dma_area,
|
||||
runtime->dma_addr,
|
||||
runtime->dma_bytes);
|
||||
}
|
||||
|
||||
static snd_pcm_ops_t pxa2xx_pcm_ops = {
|
||||
.open = pxa2xx_pcm_open,
|
||||
.close = pxa2xx_pcm_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = pxa2xx_pcm_hw_params,
|
||||
.hw_free = pxa2xx_pcm_hw_free,
|
||||
.prepare = pxa2xx_pcm_prepare,
|
||||
.trigger = pxa2xx_pcm_trigger,
|
||||
.pointer = pxa2xx_pcm_pointer,
|
||||
.mmap = pxa2xx_pcm_mmap,
|
||||
};
|
||||
|
||||
static int pxa2xx_pcm_preallocate_dma_buffer(snd_pcm_t *pcm, int stream)
|
||||
{
|
||||
snd_pcm_substream_t *substream = pcm->streams[stream].substream;
|
||||
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
||||
size_t size = pxa2xx_pcm_hardware.buffer_bytes_max;
|
||||
buf->dev.type = SNDRV_DMA_TYPE_DEV;
|
||||
buf->dev.dev = pcm->card->dev;
|
||||
buf->private_data = NULL;
|
||||
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
|
||||
&buf->addr, GFP_KERNEL);
|
||||
if (!buf->area)
|
||||
return -ENOMEM;
|
||||
buf->bytes = size;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pxa2xx_pcm_free_dma_buffers(snd_pcm_t *pcm)
|
||||
{
|
||||
snd_pcm_substream_t *substream;
|
||||
struct snd_dma_buffer *buf;
|
||||
int stream;
|
||||
|
||||
for (stream = 0; stream < 2; stream++) {
|
||||
substream = pcm->streams[stream].substream;
|
||||
if (!substream)
|
||||
continue;
|
||||
buf = &substream->dma_buffer;
|
||||
if (!buf->area)
|
||||
continue;
|
||||
dma_free_writecombine(pcm->card->dev, buf->bytes,
|
||||
buf->area, buf->addr);
|
||||
buf->area = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static u64 pxa2xx_pcm_dmamask = 0xffffffff;
|
||||
|
||||
int pxa2xx_pcm_new(snd_card_t *card, pxa2xx_pcm_client_t *client, snd_pcm_t **rpcm)
|
||||
{
|
||||
snd_pcm_t *pcm;
|
||||
int play = client->playback_params ? 1 : 0;
|
||||
int capt = client->capture_params ? 1 : 0;
|
||||
int ret;
|
||||
|
||||
ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
pcm->private_data = client;
|
||||
pcm->private_free = pxa2xx_pcm_free_dma_buffers;
|
||||
|
||||
if (!card->dev->dma_mask)
|
||||
card->dev->dma_mask = &pxa2xx_pcm_dmamask;
|
||||
if (!card->dev->coherent_dma_mask)
|
||||
card->dev->coherent_dma_mask = 0xffffffff;
|
||||
|
||||
if (play) {
|
||||
int stream = SNDRV_PCM_STREAM_PLAYBACK;
|
||||
snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
|
||||
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
if (capt) {
|
||||
int stream = SNDRV_PCM_STREAM_CAPTURE;
|
||||
snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
|
||||
ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (rpcm)
|
||||
*rpcm = pcm;
|
||||
ret = 0;
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(pxa2xx_pcm_new);
|
||||
|
||||
MODULE_AUTHOR("Nicolas Pitre");
|
||||
MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
|
||||
MODULE_LICENSE("GPL");
|
||||
29
sound/arm/pxa2xx-pcm.h
Normal file
29
sound/arm/pxa2xx-pcm.h
Normal file
|
|
@ -0,0 +1,29 @@
|
|||
/*
|
||||
* linux/sound/arm/pxa2xx-pcm.h -- ALSA PCM interface for the Intel PXA2xx chip
|
||||
*
|
||||
* Author: Nicolas Pitre
|
||||
* Created: Nov 30, 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.
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
char *name; /* stream identifier */
|
||||
u32 dcmd; /* DMA descriptor dcmd field */
|
||||
volatile u32 *drcmr; /* the DMA request channel to use */
|
||||
u32 dev_addr; /* device physical address for DMA */
|
||||
} pxa2xx_pcm_dma_params_t;
|
||||
|
||||
typedef struct {
|
||||
pxa2xx_pcm_dma_params_t *playback_params;
|
||||
pxa2xx_pcm_dma_params_t *capture_params;
|
||||
int (*startup)(snd_pcm_substream_t *);
|
||||
void (*shutdown)(snd_pcm_substream_t *);
|
||||
int (*prepare)(snd_pcm_substream_t *);
|
||||
} pxa2xx_pcm_client_t;
|
||||
|
||||
extern int pxa2xx_pcm_new(snd_card_t *, pxa2xx_pcm_client_t *, snd_pcm_t **);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user