diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/arm/aaci.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/arm/aaci.c | 1116 |
1 files changed, 0 insertions, 1116 deletions
diff --git a/ANDROID_3.4.5/sound/arm/aaci.c b/ANDROID_3.4.5/sound/arm/aaci.c deleted file mode 100644 index 5119fdab..00000000 --- a/ANDROID_3.4.5/sound/arm/aaci.c +++ /dev/null @@ -1,1116 +0,0 @@ -/* - * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver - * - * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved. - * - * 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. - * - * Documentation: ARM DDI 0173B - */ -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/device.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/err.h> -#include <linux/amba/bus.h> -#include <linux/io.h> - -#include <sound/core.h> -#include <sound/initval.h> -#include <sound/ac97_codec.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> - -#include "aaci.h" - -#define DRIVER_NAME "aaci-pl041" - -#define FRAME_PERIOD_US 21 - -/* - * PM support is not complete. Turn it off. - */ -#undef CONFIG_PM - -static void aaci_ac97_select_codec(struct aaci *aaci, struct snd_ac97 *ac97) -{ - u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num); - - /* - * Ensure that the slot 1/2 RX registers are empty. - */ - v = readl(aaci->base + AACI_SLFR); - if (v & SLFR_2RXV) - readl(aaci->base + AACI_SL2RX); - if (v & SLFR_1RXV) - readl(aaci->base + AACI_SL1RX); - - if (maincr != readl(aaci->base + AACI_MAINCR)) { - writel(maincr, aaci->base + AACI_MAINCR); - readl(aaci->base + AACI_MAINCR); - udelay(1); - } -} - -/* - * P29: - * The recommended use of programming the external codec through slot 1 - * and slot 2 data is to use the channels during setup routines and the - * slot register at any other time. The data written into slot 1, slot 2 - * and slot 12 registers is transmitted only when their corresponding - * SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR - * register. - */ -static void aaci_ac97_write(struct snd_ac97 *ac97, unsigned short reg, - unsigned short val) -{ - struct aaci *aaci = ac97->private_data; - int timeout; - u32 v; - - if (ac97->num >= 4) - return; - - mutex_lock(&aaci->ac97_sem); - - aaci_ac97_select_codec(aaci, ac97); - - /* - * P54: You must ensure that AACI_SL2TX is always written - * to, if required, before data is written to AACI_SL1TX. - */ - writel(val << 4, aaci->base + AACI_SL2TX); - writel(reg << 12, aaci->base + AACI_SL1TX); - - /* Initially, wait one frame period */ - udelay(FRAME_PERIOD_US); - - /* And then wait an additional eight frame periods for it to be sent */ - timeout = FRAME_PERIOD_US * 8; - do { - udelay(1); - v = readl(aaci->base + AACI_SLFR); - } while ((v & (SLFR_1TXB|SLFR_2TXB)) && --timeout); - - if (v & (SLFR_1TXB|SLFR_2TXB)) - dev_err(&aaci->dev->dev, - "timeout waiting for write to complete\n"); - - mutex_unlock(&aaci->ac97_sem); -} - -/* - * Read an AC'97 register. - */ -static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg) -{ - struct aaci *aaci = ac97->private_data; - int timeout, retries = 10; - u32 v; - - if (ac97->num >= 4) - return ~0; - - mutex_lock(&aaci->ac97_sem); - - aaci_ac97_select_codec(aaci, ac97); - - /* - * Write the register address to slot 1. - */ - writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX); - - /* Initially, wait one frame period */ - udelay(FRAME_PERIOD_US); - - /* And then wait an additional eight frame periods for it to be sent */ - timeout = FRAME_PERIOD_US * 8; - do { - udelay(1); - v = readl(aaci->base + AACI_SLFR); - } while ((v & SLFR_1TXB) && --timeout); - - if (v & SLFR_1TXB) { - dev_err(&aaci->dev->dev, "timeout on slot 1 TX busy\n"); - v = ~0; - goto out; - } - - /* Now wait for the response frame */ - udelay(FRAME_PERIOD_US); - - /* And then wait an additional eight frame periods for data */ - timeout = FRAME_PERIOD_US * 8; - do { - udelay(1); - cond_resched(); - v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV); - } while ((v != (SLFR_1RXV|SLFR_2RXV)) && --timeout); - - if (v != (SLFR_1RXV|SLFR_2RXV)) { - dev_err(&aaci->dev->dev, "timeout on RX valid\n"); - v = ~0; - goto out; - } - - do { - v = readl(aaci->base + AACI_SL1RX) >> 12; - if (v == reg) { - v = readl(aaci->base + AACI_SL2RX) >> 4; - break; - } else if (--retries) { - dev_warn(&aaci->dev->dev, - "ac97 read back fail. retry\n"); - continue; - } else { - dev_warn(&aaci->dev->dev, - "wrong ac97 register read back (%x != %x)\n", - v, reg); - v = ~0; - } - } while (retries); - out: - mutex_unlock(&aaci->ac97_sem); - return v; -} - -static inline void -aaci_chan_wait_ready(struct aaci_runtime *aacirun, unsigned long mask) -{ - u32 val; - int timeout = 5000; - - do { - udelay(1); - val = readl(aacirun->base + AACI_SR); - } while (val & mask && timeout--); -} - - - -/* - * Interrupt support. - */ -static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask) -{ - if (mask & ISR_ORINTR) { - dev_warn(&aaci->dev->dev, "RX overrun on chan %d\n", channel); - writel(ICLR_RXOEC1 << channel, aaci->base + AACI_INTCLR); - } - - if (mask & ISR_RXTOINTR) { - dev_warn(&aaci->dev->dev, "RX timeout on chan %d\n", channel); - writel(ICLR_RXTOFEC1 << channel, aaci->base + AACI_INTCLR); - } - - if (mask & ISR_RXINTR) { - struct aaci_runtime *aacirun = &aaci->capture; - bool period_elapsed = false; - void *ptr; - - if (!aacirun->substream || !aacirun->start) { - dev_warn(&aaci->dev->dev, "RX interrupt???\n"); - writel(0, aacirun->base + AACI_IE); - return; - } - - spin_lock(&aacirun->lock); - - ptr = aacirun->ptr; - do { - unsigned int len = aacirun->fifo_bytes; - u32 val; - - if (aacirun->bytes <= 0) { - aacirun->bytes += aacirun->period; - period_elapsed = true; - } - if (!(aacirun->cr & CR_EN)) - break; - - val = readl(aacirun->base + AACI_SR); - if (!(val & SR_RXHF)) - break; - if (!(val & SR_RXFF)) - len >>= 1; - - aacirun->bytes -= len; - - /* reading 16 bytes at a time */ - for( ; len > 0; len -= 16) { - asm( - "ldmia %1, {r0, r1, r2, r3}\n\t" - "stmia %0!, {r0, r1, r2, r3}" - : "+r" (ptr) - : "r" (aacirun->fifo) - : "r0", "r1", "r2", "r3", "cc"); - - if (ptr >= aacirun->end) - ptr = aacirun->start; - } - } while(1); - - aacirun->ptr = ptr; - - spin_unlock(&aacirun->lock); - - if (period_elapsed) - snd_pcm_period_elapsed(aacirun->substream); - } - - if (mask & ISR_URINTR) { - dev_dbg(&aaci->dev->dev, "TX underrun on chan %d\n", channel); - writel(ICLR_TXUEC1 << channel, aaci->base + AACI_INTCLR); - } - - if (mask & ISR_TXINTR) { - struct aaci_runtime *aacirun = &aaci->playback; - bool period_elapsed = false; - void *ptr; - - if (!aacirun->substream || !aacirun->start) { - dev_warn(&aaci->dev->dev, "TX interrupt???\n"); - writel(0, aacirun->base + AACI_IE); - return; - } - - spin_lock(&aacirun->lock); - - ptr = aacirun->ptr; - do { - unsigned int len = aacirun->fifo_bytes; - u32 val; - - if (aacirun->bytes <= 0) { - aacirun->bytes += aacirun->period; - period_elapsed = true; - } - if (!(aacirun->cr & CR_EN)) - break; - - val = readl(aacirun->base + AACI_SR); - if (!(val & SR_TXHE)) - break; - if (!(val & SR_TXFE)) - len >>= 1; - - aacirun->bytes -= len; - - /* writing 16 bytes at a time */ - for ( ; len > 0; len -= 16) { - asm( - "ldmia %0!, {r0, r1, r2, r3}\n\t" - "stmia %1, {r0, r1, r2, r3}" - : "+r" (ptr) - : "r" (aacirun->fifo) - : "r0", "r1", "r2", "r3", "cc"); - - if (ptr >= aacirun->end) - ptr = aacirun->start; - } - } while (1); - - aacirun->ptr = ptr; - - spin_unlock(&aacirun->lock); - - if (period_elapsed) - snd_pcm_period_elapsed(aacirun->substream); - } -} - -static irqreturn_t aaci_irq(int irq, void *devid) -{ - struct aaci *aaci = devid; - u32 mask; - int i; - - mask = readl(aaci->base + AACI_ALLINTS); - if (mask) { - u32 m = mask; - for (i = 0; i < 4; i++, m >>= 7) { - if (m & 0x7f) { - aaci_fifo_irq(aaci, i, m); - } - } - } - - return mask ? IRQ_HANDLED : IRQ_NONE; -} - - - -/* - * ALSA support. - */ -static struct snd_pcm_hardware aaci_hw_info = { - .info = SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_RESUME, - - /* - * ALSA doesn't support 18-bit or 20-bit packed into 32-bit - * words. It also doesn't support 12-bit at all. - */ - .formats = SNDRV_PCM_FMTBIT_S16_LE, - - /* rates are setup from the AC'97 codec */ - .channels_min = 2, - .channels_max = 2, - .buffer_bytes_max = 64 * 1024, - .period_bytes_min = 256, - .period_bytes_max = PAGE_SIZE, - .periods_min = 4, - .periods_max = PAGE_SIZE / 16, -}; - -/* - * We can support two and four channel audio. Unfortunately - * six channel audio requires a non-standard channel ordering: - * 2 -> FL(3), FR(4) - * 4 -> FL(3), FR(4), SL(7), SR(8) - * 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required) - * FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual) - * This requires an ALSA configuration file to correct. - */ -static int aaci_rule_channels(struct snd_pcm_hw_params *p, - struct snd_pcm_hw_rule *rule) -{ - static unsigned int channel_list[] = { 2, 4, 6 }; - struct aaci *aaci = rule->private; - unsigned int mask = 1 << 0, slots; - - /* pcms[0] is the our 5.1 PCM instance. */ - slots = aaci->ac97_bus->pcms[0].r[0].slots; - if (slots & (1 << AC97_SLOT_PCM_SLEFT)) { - mask |= 1 << 1; - if (slots & (1 << AC97_SLOT_LFE)) - mask |= 1 << 2; - } - - return snd_interval_list(hw_param_interval(p, rule->var), - ARRAY_SIZE(channel_list), channel_list, mask); -} - -static int aaci_pcm_open(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct aaci *aaci = substream->private_data; - struct aaci_runtime *aacirun; - int ret = 0; - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - aacirun = &aaci->playback; - } else { - aacirun = &aaci->capture; - } - - aacirun->substream = substream; - runtime->private_data = aacirun; - runtime->hw = aaci_hw_info; - runtime->hw.rates = aacirun->pcm->rates; - snd_pcm_limit_hw_rates(runtime); - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - runtime->hw.channels_max = 6; - - /* Add rule describing channel dependency. */ - ret = snd_pcm_hw_rule_add(substream->runtime, 0, - SNDRV_PCM_HW_PARAM_CHANNELS, - aaci_rule_channels, aaci, - SNDRV_PCM_HW_PARAM_CHANNELS, -1); - if (ret) - return ret; - - if (aacirun->pcm->r[1].slots) - snd_ac97_pcm_double_rate_rules(runtime); - } - - /* - * ALSA wants the byte-size of the FIFOs. As we only support - * 16-bit samples, this is twice the FIFO depth irrespective - * of whether it's in compact mode or not. - */ - runtime->hw.fifo_size = aaci->fifo_depth * 2; - - mutex_lock(&aaci->irq_lock); - if (!aaci->users++) { - ret = request_irq(aaci->dev->irq[0], aaci_irq, - IRQF_SHARED, DRIVER_NAME, aaci); - if (ret != 0) - aaci->users--; - } - mutex_unlock(&aaci->irq_lock); - - return ret; -} - - -/* - * Common ALSA stuff - */ -static int aaci_pcm_close(struct snd_pcm_substream *substream) -{ - struct aaci *aaci = substream->private_data; - struct aaci_runtime *aacirun = substream->runtime->private_data; - - WARN_ON(aacirun->cr & CR_EN); - - aacirun->substream = NULL; - - mutex_lock(&aaci->irq_lock); - if (!--aaci->users) - free_irq(aaci->dev->irq[0], aaci); - mutex_unlock(&aaci->irq_lock); - - return 0; -} - -static int aaci_pcm_hw_free(struct snd_pcm_substream *substream) -{ - struct aaci_runtime *aacirun = substream->runtime->private_data; - - /* - * This must not be called with the device enabled. - */ - WARN_ON(aacirun->cr & CR_EN); - - if (aacirun->pcm_open) - snd_ac97_pcm_close(aacirun->pcm); - aacirun->pcm_open = 0; - - /* - * Clear out the DMA and any allocated buffers. - */ - snd_pcm_lib_free_pages(substream); - - return 0; -} - -/* Channel to slot mask */ -static const u32 channels_to_slotmask[] = { - [2] = CR_SL3 | CR_SL4, - [4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8, - [6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9, -}; - -static int aaci_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct aaci_runtime *aacirun = substream->runtime->private_data; - unsigned int channels = params_channels(params); - unsigned int rate = params_rate(params); - int dbl = rate > 48000; - int err; - - aaci_pcm_hw_free(substream); - if (aacirun->pcm_open) { - snd_ac97_pcm_close(aacirun->pcm); - aacirun->pcm_open = 0; - } - - /* channels is already limited to 2, 4, or 6 by aaci_rule_channels */ - if (dbl && channels != 2) - return -EINVAL; - - err = snd_pcm_lib_malloc_pages(substream, - params_buffer_bytes(params)); - if (err >= 0) { - struct aaci *aaci = substream->private_data; - - err = snd_ac97_pcm_open(aacirun->pcm, rate, channels, - aacirun->pcm->r[dbl].slots); - - aacirun->pcm_open = err == 0; - aacirun->cr = CR_FEN | CR_COMPACT | CR_SZ16; - aacirun->cr |= channels_to_slotmask[channels + dbl * 2]; - - /* - * fifo_bytes is the number of bytes we transfer to/from - * the FIFO, including padding. So that's x4. As we're - * in compact mode, the FIFO is half the size. - */ - aacirun->fifo_bytes = aaci->fifo_depth * 4 / 2; - } - - return err; -} - -static int aaci_pcm_prepare(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct aaci_runtime *aacirun = runtime->private_data; - - aacirun->period = snd_pcm_lib_period_bytes(substream); - aacirun->start = runtime->dma_area; - aacirun->end = aacirun->start + snd_pcm_lib_buffer_bytes(substream); - aacirun->ptr = aacirun->start; - aacirun->bytes = aacirun->period; - - return 0; -} - -static snd_pcm_uframes_t aaci_pcm_pointer(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct aaci_runtime *aacirun = runtime->private_data; - ssize_t bytes = aacirun->ptr - aacirun->start; - - return bytes_to_frames(runtime, bytes); -} - - -/* - * Playback specific ALSA stuff - */ -static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun) -{ - u32 ie; - - ie = readl(aacirun->base + AACI_IE); - ie &= ~(IE_URIE|IE_TXIE); - writel(ie, aacirun->base + AACI_IE); - aacirun->cr &= ~CR_EN; - aaci_chan_wait_ready(aacirun, SR_TXB); - writel(aacirun->cr, aacirun->base + AACI_TXCR); -} - -static void aaci_pcm_playback_start(struct aaci_runtime *aacirun) -{ - u32 ie; - - aaci_chan_wait_ready(aacirun, SR_TXB); - aacirun->cr |= CR_EN; - - ie = readl(aacirun->base + AACI_IE); - ie |= IE_URIE | IE_TXIE; - writel(ie, aacirun->base + AACI_IE); - writel(aacirun->cr, aacirun->base + AACI_TXCR); -} - -static int aaci_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct aaci_runtime *aacirun = substream->runtime->private_data; - unsigned long flags; - int ret = 0; - - spin_lock_irqsave(&aacirun->lock, flags); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - aaci_pcm_playback_start(aacirun); - break; - - case SNDRV_PCM_TRIGGER_RESUME: - aaci_pcm_playback_start(aacirun); - break; - - case SNDRV_PCM_TRIGGER_STOP: - aaci_pcm_playback_stop(aacirun); - break; - - case SNDRV_PCM_TRIGGER_SUSPEND: - aaci_pcm_playback_stop(aacirun); - break; - - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - break; - - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - break; - - default: - ret = -EINVAL; - } - - spin_unlock_irqrestore(&aacirun->lock, flags); - - return ret; -} - -static struct snd_pcm_ops aaci_playback_ops = { - .open = aaci_pcm_open, - .close = aaci_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = aaci_pcm_hw_params, - .hw_free = aaci_pcm_hw_free, - .prepare = aaci_pcm_prepare, - .trigger = aaci_pcm_playback_trigger, - .pointer = aaci_pcm_pointer, -}; - -static void aaci_pcm_capture_stop(struct aaci_runtime *aacirun) -{ - u32 ie; - - aaci_chan_wait_ready(aacirun, SR_RXB); - - ie = readl(aacirun->base + AACI_IE); - ie &= ~(IE_ORIE | IE_RXIE); - writel(ie, aacirun->base+AACI_IE); - - aacirun->cr &= ~CR_EN; - - writel(aacirun->cr, aacirun->base + AACI_RXCR); -} - -static void aaci_pcm_capture_start(struct aaci_runtime *aacirun) -{ - u32 ie; - - aaci_chan_wait_ready(aacirun, SR_RXB); - -#ifdef DEBUG - /* RX Timeout value: bits 28:17 in RXCR */ - aacirun->cr |= 0xf << 17; -#endif - - aacirun->cr |= CR_EN; - writel(aacirun->cr, aacirun->base + AACI_RXCR); - - ie = readl(aacirun->base + AACI_IE); - ie |= IE_ORIE |IE_RXIE; // overrun and rx interrupt -- half full - writel(ie, aacirun->base + AACI_IE); -} - -static int aaci_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct aaci_runtime *aacirun = substream->runtime->private_data; - unsigned long flags; - int ret = 0; - - spin_lock_irqsave(&aacirun->lock, flags); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - aaci_pcm_capture_start(aacirun); - break; - - case SNDRV_PCM_TRIGGER_RESUME: - aaci_pcm_capture_start(aacirun); - break; - - case SNDRV_PCM_TRIGGER_STOP: - aaci_pcm_capture_stop(aacirun); - break; - - case SNDRV_PCM_TRIGGER_SUSPEND: - aaci_pcm_capture_stop(aacirun); - break; - - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - break; - - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - break; - - default: - ret = -EINVAL; - } - - spin_unlock_irqrestore(&aacirun->lock, flags); - - return ret; -} - -static int aaci_pcm_capture_prepare(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct aaci *aaci = substream->private_data; - - aaci_pcm_prepare(substream); - - /* allow changing of sample rate */ - aaci_ac97_write(aaci->ac97, AC97_EXTENDED_STATUS, 0x0001); /* VRA */ - aaci_ac97_write(aaci->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); - aaci_ac97_write(aaci->ac97, AC97_PCM_MIC_ADC_RATE, runtime->rate); - - /* Record select: Mic: 0, Aux: 3, Line: 4 */ - aaci_ac97_write(aaci->ac97, AC97_REC_SEL, 0x0404); - - return 0; -} - -static struct snd_pcm_ops aaci_capture_ops = { - .open = aaci_pcm_open, - .close = aaci_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = aaci_pcm_hw_params, - .hw_free = aaci_pcm_hw_free, - .prepare = aaci_pcm_capture_prepare, - .trigger = aaci_pcm_capture_trigger, - .pointer = aaci_pcm_pointer, -}; - -/* - * Power Management. - */ -#ifdef CONFIG_PM -static int aaci_do_suspend(struct snd_card *card, unsigned int state) -{ - struct aaci *aaci = card->private_data; - snd_power_change_state(card, SNDRV_CTL_POWER_D3cold); - snd_pcm_suspend_all(aaci->pcm); - return 0; -} - -static int aaci_do_resume(struct snd_card *card, unsigned int state) -{ - snd_power_change_state(card, SNDRV_CTL_POWER_D0); - return 0; -} - -static int aaci_suspend(struct amba_device *dev, pm_message_t state) -{ - struct snd_card *card = amba_get_drvdata(dev); - return card ? aaci_do_suspend(card) : 0; -} - -static int aaci_resume(struct amba_device *dev) -{ - struct snd_card *card = amba_get_drvdata(dev); - return card ? aaci_do_resume(card) : 0; -} -#else -#define aaci_do_suspend NULL -#define aaci_do_resume NULL -#define aaci_suspend NULL -#define aaci_resume NULL -#endif - - -static struct ac97_pcm ac97_defs[] __devinitdata = { - [0] = { /* Front PCM */ - .exclusive = 1, - .r = { - [0] = { - .slots = (1 << AC97_SLOT_PCM_LEFT) | - (1 << AC97_SLOT_PCM_RIGHT) | - (1 << AC97_SLOT_PCM_CENTER) | - (1 << AC97_SLOT_PCM_SLEFT) | - (1 << AC97_SLOT_PCM_SRIGHT) | - (1 << AC97_SLOT_LFE), - }, - [1] = { - .slots = (1 << AC97_SLOT_PCM_LEFT) | - (1 << AC97_SLOT_PCM_RIGHT) | - (1 << AC97_SLOT_PCM_LEFT_0) | - (1 << AC97_SLOT_PCM_RIGHT_0), - }, - }, - }, - [1] = { /* PCM in */ - .stream = 1, - .exclusive = 1, - .r = { - [0] = { - .slots = (1 << AC97_SLOT_PCM_LEFT) | - (1 << AC97_SLOT_PCM_RIGHT), - }, - }, - }, - [2] = { /* Mic in */ - .stream = 1, - .exclusive = 1, - .r = { - [0] = { - .slots = (1 << AC97_SLOT_MIC), - }, - }, - } -}; - -static struct snd_ac97_bus_ops aaci_bus_ops = { - .write = aaci_ac97_write, - .read = aaci_ac97_read, -}; - -static int __devinit aaci_probe_ac97(struct aaci *aaci) -{ - struct snd_ac97_template ac97_template; - struct snd_ac97_bus *ac97_bus; - struct snd_ac97 *ac97; - int ret; - - /* - * Assert AACIRESET for 2us - */ - writel(0, aaci->base + AACI_RESET); - udelay(2); - writel(RESET_NRST, aaci->base + AACI_RESET); - - /* - * Give the AC'97 codec more than enough time - * to wake up. (42us = ~2 frames at 48kHz.) - */ - udelay(FRAME_PERIOD_US * 2); - - ret = snd_ac97_bus(aaci->card, 0, &aaci_bus_ops, aaci, &ac97_bus); - if (ret) - goto out; - - ac97_bus->clock = 48000; - aaci->ac97_bus = ac97_bus; - - memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); - ac97_template.private_data = aaci; - ac97_template.num = 0; - ac97_template.scaps = AC97_SCAP_SKIP_MODEM; - - ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97); - if (ret) - goto out; - aaci->ac97 = ac97; - - /* - * Disable AC97 PC Beep input on audio codecs. - */ - if (ac97_is_audio(ac97)) - snd_ac97_write_cache(ac97, AC97_PC_BEEP, 0x801e); - - ret = snd_ac97_pcm_assign(ac97_bus, ARRAY_SIZE(ac97_defs), ac97_defs); - if (ret) - goto out; - - aaci->playback.pcm = &ac97_bus->pcms[0]; - aaci->capture.pcm = &ac97_bus->pcms[1]; - - out: - return ret; -} - -static void aaci_free_card(struct snd_card *card) -{ - struct aaci *aaci = card->private_data; - if (aaci->base) - iounmap(aaci->base); -} - -static struct aaci * __devinit aaci_init_card(struct amba_device *dev) -{ - struct aaci *aaci; - struct snd_card *card; - int err; - - err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, - THIS_MODULE, sizeof(struct aaci), &card); - if (err < 0) - return NULL; - - card->private_free = aaci_free_card; - - strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver)); - strlcpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname)); - snprintf(card->longname, sizeof(card->longname), - "%s PL%03x rev%u at 0x%08llx, irq %d", - card->shortname, amba_part(dev), amba_rev(dev), - (unsigned long long)dev->res.start, dev->irq[0]); - - aaci = card->private_data; - mutex_init(&aaci->ac97_sem); - mutex_init(&aaci->irq_lock); - aaci->card = card; - aaci->dev = dev; - - /* Set MAINCR to allow slot 1 and 2 data IO */ - aaci->maincr = MAINCR_IE | MAINCR_SL1RXEN | MAINCR_SL1TXEN | - MAINCR_SL2RXEN | MAINCR_SL2TXEN; - - return aaci; -} - -static int __devinit aaci_init_pcm(struct aaci *aaci) -{ - struct snd_pcm *pcm; - int ret; - - ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 1, &pcm); - if (ret == 0) { - aaci->pcm = pcm; - pcm->private_data = aaci; - pcm->info_flags = 0; - - strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name)); - - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops); - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &aaci_capture_ops); - snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - NULL, 0, 64 * 1024); - } - - return ret; -} - -static unsigned int __devinit aaci_size_fifo(struct aaci *aaci) -{ - struct aaci_runtime *aacirun = &aaci->playback; - int i; - - /* - * Enable the channel, but don't assign it to any slots, so - * it won't empty onto the AC'97 link. - */ - writel(CR_FEN | CR_SZ16 | CR_EN, aacirun->base + AACI_TXCR); - - for (i = 0; !(readl(aacirun->base + AACI_SR) & SR_TXFF) && i < 4096; i++) - writel(0, aacirun->fifo); - - writel(0, aacirun->base + AACI_TXCR); - - /* - * Re-initialise the AACI after the FIFO depth test, to - * ensure that the FIFOs are empty. Unfortunately, merely - * disabling the channel doesn't clear the FIFO. - */ - writel(aaci->maincr & ~MAINCR_IE, aaci->base + AACI_MAINCR); - readl(aaci->base + AACI_MAINCR); - udelay(1); - writel(aaci->maincr, aaci->base + AACI_MAINCR); - - /* - * If we hit 4096 entries, we failed. Go back to the specified - * fifo depth. - */ - if (i == 4096) - i = 8; - - return i; -} - -static int __devinit aaci_probe(struct amba_device *dev, - const struct amba_id *id) -{ - struct aaci *aaci; - int ret, i; - - ret = amba_request_regions(dev, NULL); - if (ret) - return ret; - - aaci = aaci_init_card(dev); - if (!aaci) { - ret = -ENOMEM; - goto out; - } - - aaci->base = ioremap(dev->res.start, resource_size(&dev->res)); - if (!aaci->base) { - ret = -ENOMEM; - goto out; - } - - /* - * Playback uses AACI channel 0 - */ - spin_lock_init(&aaci->playback.lock); - aaci->playback.base = aaci->base + AACI_CSCH1; - aaci->playback.fifo = aaci->base + AACI_DR1; - - /* - * Capture uses AACI channel 0 - */ - spin_lock_init(&aaci->capture.lock); - aaci->capture.base = aaci->base + AACI_CSCH1; - aaci->capture.fifo = aaci->base + AACI_DR1; - - for (i = 0; i < 4; i++) { - void __iomem *base = aaci->base + i * 0x14; - - writel(0, base + AACI_IE); - writel(0, base + AACI_TXCR); - writel(0, base + AACI_RXCR); - } - - writel(0x1fff, aaci->base + AACI_INTCLR); - writel(aaci->maincr, aaci->base + AACI_MAINCR); - /* - * Fix: ac97 read back fail errors by reading - * from any arbitrary aaci register. - */ - readl(aaci->base + AACI_CSCH1); - ret = aaci_probe_ac97(aaci); - if (ret) - goto out; - - /* - * Size the FIFOs (must be multiple of 16). - * This is the number of entries in the FIFO. - */ - aaci->fifo_depth = aaci_size_fifo(aaci); - if (aaci->fifo_depth & 15) { - printk(KERN_WARNING "AACI: FIFO depth %d not supported\n", - aaci->fifo_depth); - ret = -ENODEV; - goto out; - } - - ret = aaci_init_pcm(aaci); - if (ret) - goto out; - - snd_card_set_dev(aaci->card, &dev->dev); - - ret = snd_card_register(aaci->card); - if (ret == 0) { - dev_info(&dev->dev, "%s\n", aaci->card->longname); - dev_info(&dev->dev, "FIFO %u entries\n", aaci->fifo_depth); - amba_set_drvdata(dev, aaci->card); - return ret; - } - - out: - if (aaci) - snd_card_free(aaci->card); - amba_release_regions(dev); - return ret; -} - -static int __devexit aaci_remove(struct amba_device *dev) -{ - struct snd_card *card = amba_get_drvdata(dev); - - amba_set_drvdata(dev, NULL); - - if (card) { - struct aaci *aaci = card->private_data; - writel(0, aaci->base + AACI_MAINCR); - - snd_card_free(card); - amba_release_regions(dev); - } - - return 0; -} - -static struct amba_id aaci_ids[] = { - { - .id = 0x00041041, - .mask = 0x000fffff, - }, - { 0, 0 }, -}; - -MODULE_DEVICE_TABLE(amba, aaci_ids); - -static struct amba_driver aaci_driver = { - .drv = { - .name = DRIVER_NAME, - }, - .probe = aaci_probe, - .remove = __devexit_p(aaci_remove), - .suspend = aaci_suspend, - .resume = aaci_resume, - .id_table = aaci_ids, -}; - -module_amba_driver(aaci_driver); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver"); |