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-rw-r--r--sound/arm/aaci.c968
1 files changed, 968 insertions, 0 deletions
diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
new file mode 100644
index 00000000000..08cc3ddca96
--- /dev/null
+++ b/sound/arm/aaci.c
@@ -0,0 +1,968 @@
+/*
+ * 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 <asm/io.h>
+#include <asm/irq.h>
+#include <asm/hardware/amba.h>
+
+#include <sound/driver.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"
+#include "devdma.h"
+
+#define DRIVER_NAME "aaci-pl041"
+
+/*
+ * PM support is not complete. Turn it off.
+ */
+#undef CONFIG_PM
+
+static void aaci_ac97_select_codec(struct aaci *aaci, ac97_t *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);
+
+ writel(maincr, aaci->base + AACI_MAINCR);
+}
+
+/*
+ * 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(ac97_t *ac97, unsigned short reg, unsigned short val)
+{
+ struct aaci *aaci = ac97->private_data;
+ u32 v;
+
+ if (ac97->num >= 4)
+ return;
+
+ down(&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);
+
+ /*
+ * Wait for the transmission of both slots to complete.
+ */
+ do {
+ v = readl(aaci->base + AACI_SLFR);
+ } while (v & (SLFR_1TXB|SLFR_2TXB));
+
+ up(&aaci->ac97_sem);
+}
+
+/*
+ * Read an AC'97 register.
+ */
+static unsigned short aaci_ac97_read(ac97_t *ac97, unsigned short reg)
+{
+ struct aaci *aaci = ac97->private_data;
+ u32 v;
+
+ if (ac97->num >= 4)
+ return ~0;
+
+ down(&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);
+
+ /*
+ * Wait for the transmission to complete.
+ */
+ do {
+ v = readl(aaci->base + AACI_SLFR);
+ } while (v & SLFR_1TXB);
+
+ /*
+ * Give the AC'97 codec more than enough time
+ * to respond. (42us = ~2 frames at 48kHz.)
+ */
+ udelay(42);
+
+ /*
+ * Wait for slot 2 to indicate data.
+ */
+ do {
+ cond_resched();
+ v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
+ } while (v != (SLFR_1RXV|SLFR_2RXV));
+
+ v = readl(aaci->base + AACI_SL1RX) >> 12;
+ if (v == reg) {
+ v = readl(aaci->base + AACI_SL2RX) >> 4;
+ } else {
+ dev_err(&aaci->dev->dev,
+ "wrong ac97 register read back (%x != %x)\n",
+ v, reg);
+ v = ~0;
+ }
+
+ up(&aaci->ac97_sem);
+ return v;
+}
+
+static inline void aaci_chan_wait_ready(struct aaci_runtime *aacirun)
+{
+ u32 val;
+ int timeout = 5000;
+
+ do {
+ val = readl(aacirun->base + AACI_SR);
+ } while (val & (SR_TXB|SR_RXB) && timeout--);
+}
+
+
+
+/*
+ * Interrupt support.
+ */
+static void aaci_fifo_irq(struct aaci *aaci, u32 mask)
+{
+ if (mask & ISR_URINTR) {
+ writel(ICLR_TXUEC1, aaci->base + AACI_INTCLR);
+ }
+
+ if (mask & ISR_TXINTR) {
+ struct aaci_runtime *aacirun = &aaci->playback;
+ void *ptr;
+
+ if (!aacirun->substream || !aacirun->start) {
+ dev_warn(&aaci->dev->dev, "TX interrupt???");
+ writel(0, aacirun->base + AACI_IE);
+ return;
+ }
+
+ ptr = aacirun->ptr;
+ do {
+ unsigned int len = aacirun->fifosz;
+ u32 val;
+
+ if (aacirun->bytes <= 0) {
+ aacirun->bytes += aacirun->period;
+ aacirun->ptr = ptr;
+ spin_unlock(&aaci->lock);
+ snd_pcm_period_elapsed(aacirun->substream);
+ spin_lock(&aaci->lock);
+ }
+ if (!(aacirun->cr & TXCR_TXEN))
+ 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;
+ }
+}
+
+static irqreturn_t aaci_irq(int irq, void *devid, struct pt_regs *regs)
+{
+ struct aaci *aaci = devid;
+ u32 mask;
+ int i;
+
+ spin_lock(&aaci->lock);
+ 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, m);
+ }
+ }
+ }
+ spin_unlock(&aaci->lock);
+
+ return mask ? IRQ_HANDLED : IRQ_NONE;
+}
+
+
+
+/*
+ * ALSA support.
+ */
+
+struct aaci_stream {
+ unsigned char codec_idx;
+ unsigned char rate_idx;
+};
+
+static struct aaci_stream aaci_streams[] = {
+ [ACSTREAM_FRONT] = {
+ .codec_idx = 0,
+ .rate_idx = AC97_RATES_FRONT_DAC,
+ },
+ [ACSTREAM_SURROUND] = {
+ .codec_idx = 0,
+ .rate_idx = AC97_RATES_SURR_DAC,
+ },
+ [ACSTREAM_LFE] = {
+ .codec_idx = 0,
+ .rate_idx = AC97_RATES_LFE_DAC,
+ },
+};
+
+static inline unsigned int aaci_rate_mask(struct aaci *aaci, int streamid)
+{
+ struct aaci_stream *s = aaci_streams + streamid;
+ return aaci->ac97_bus->codec[s->codec_idx]->rates[s->rate_idx];
+}
+
+static unsigned int rate_list[] = {
+ 5512, 8000, 11025, 16000, 22050, 32000, 44100,
+ 48000, 64000, 88200, 96000, 176400, 192000
+};
+
+/*
+ * Double-rate rule: we can support double rate iff channels == 2
+ * (unimplemented)
+ */
+static int
+aaci_rule_rate_by_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
+{
+ struct aaci *aaci = rule->private;
+ unsigned int rate_mask = SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_5512;
+ snd_interval_t *c = hw_param_interval(p, SNDRV_PCM_HW_PARAM_CHANNELS);
+
+ switch (c->max) {
+ case 6:
+ rate_mask &= aaci_rate_mask(aaci, ACSTREAM_LFE);
+ case 4:
+ rate_mask &= aaci_rate_mask(aaci, ACSTREAM_SURROUND);
+ case 2:
+ rate_mask &= aaci_rate_mask(aaci, ACSTREAM_FRONT);
+ }
+
+ return snd_interval_list(hw_param_interval(p, rule->var),
+ ARRAY_SIZE(rate_list), rate_list,
+ rate_mask);
+}
+
+static snd_pcm_hardware_t 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,
+
+ /* should this be continuous or knot? */
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_max = 48000,
+ .rate_min = 4000,
+ .channels_min = 2,
+ .channels_max = 6,
+ .buffer_bytes_max = 64 * 1024,
+ .period_bytes_min = 256,
+ .period_bytes_max = PAGE_SIZE,
+ .periods_min = 4,
+ .periods_max = PAGE_SIZE / 16,
+};
+
+static int aaci_pcm_open(struct aaci *aaci, snd_pcm_substream_t *substream,
+ struct aaci_runtime *aacirun)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ int ret;
+
+ aacirun->substream = substream;
+ runtime->private_data = aacirun;
+ runtime->hw = aaci_hw_info;
+
+ /*
+ * FIXME: ALSA specifies fifo_size in bytes. If we're in normal
+ * mode, each 32-bit word contains one sample. If we're in
+ * compact mode, each 32-bit word contains two samples, effectively
+ * halving the FIFO size. However, we don't know for sure which
+ * we'll be using at this point. We set this to the lower limit.
+ */
+ runtime->hw.fifo_size = aaci->fifosize * 2;
+
+ /*
+ * Add rule describing hardware rate dependency
+ * on the number of channels.
+ */
+ ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ aaci_rule_rate_by_channels, aaci,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+ if (ret)
+ goto out;
+
+ ret = request_irq(aaci->dev->irq[0], aaci_irq, SA_SHIRQ|SA_INTERRUPT,
+ DRIVER_NAME, aaci);
+ if (ret)
+ goto out;
+
+ return 0;
+
+ out:
+ return ret;
+}
+
+
+/*
+ * Common ALSA stuff
+ */
+static int aaci_pcm_close(snd_pcm_substream_t *substream)
+{
+ struct aaci *aaci = substream->private_data;
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+
+ WARN_ON(aacirun->cr & TXCR_TXEN);
+
+ aacirun->substream = NULL;
+ free_irq(aaci->dev->irq[0], aaci);
+
+ return 0;
+}
+
+static int aaci_pcm_hw_free(snd_pcm_substream_t *substream)
+{
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+
+ /*
+ * This must not be called with the device enabled.
+ */
+ WARN_ON(aacirun->cr & TXCR_TXEN);
+
+ if (aacirun->pcm_open)
+ snd_ac97_pcm_close(aacirun->pcm);
+ aacirun->pcm_open = 0;
+
+ /*
+ * Clear out the DMA and any allocated buffers.
+ */
+ devdma_hw_free(NULL, substream);
+
+ return 0;
+}
+
+static int aaci_pcm_hw_params(snd_pcm_substream_t *substream,
+ struct aaci_runtime *aacirun,
+ snd_pcm_hw_params_t *params)
+{
+ int err;
+
+ aaci_pcm_hw_free(substream);
+
+ err = devdma_hw_alloc(NULL, substream,
+ params_buffer_bytes(params));
+ if (err < 0)
+ goto out;
+
+ err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
+ params_channels(params),
+ aacirun->pcm->r[0].slots);
+ if (err)
+ goto out;
+
+ aacirun->pcm_open = 1;
+
+ out:
+ return err;
+}
+
+static int aaci_pcm_prepare(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ struct aaci_runtime *aacirun = runtime->private_data;
+
+ aacirun->start = (void *)runtime->dma_area;
+ aacirun->end = aacirun->start + runtime->dma_bytes;
+ aacirun->ptr = aacirun->start;
+ aacirun->period =
+ aacirun->bytes = frames_to_bytes(runtime, runtime->period_size);
+
+ return 0;
+}
+
+static snd_pcm_uframes_t aaci_pcm_pointer(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ struct aaci_runtime *aacirun = runtime->private_data;
+ ssize_t bytes = aacirun->ptr - aacirun->start;
+
+ return bytes_to_frames(runtime, bytes);
+}
+
+static int aaci_pcm_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *vma)
+{
+ return devdma_mmap(NULL, substream, vma);
+}
+
+
+/*
+ * Playback specific ALSA stuff
+ */
+static const u32 channels_to_txmask[] = {
+ [2] = TXCR_TX3 | TXCR_TX4,
+ [4] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8,
+ [6] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8 | TXCR_TX6 | TXCR_TX9,
+};
+
+/*
+ * 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 unsigned int channel_list[] = { 2, 4, 6 };
+
+static int
+aaci_rule_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
+{
+ struct aaci *aaci = rule->private;
+ unsigned int chan_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)) {
+ chan_mask |= 1 << 1;
+ if (slots & (1 << AC97_SLOT_LFE))
+ chan_mask |= 1 << 2;
+ }
+
+ return snd_interval_list(hw_param_interval(p, rule->var),
+ ARRAY_SIZE(channel_list), channel_list,
+ chan_mask);
+}
+
+static int aaci_pcm_playback_open(snd_pcm_substream_t *substream)
+{
+ struct aaci *aaci = substream->private_data;
+ int ret;
+
+ /*
+ * 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;
+
+ return aaci_pcm_open(aaci, substream, &aaci->playback);
+}
+
+static int aaci_pcm_playback_hw_params(snd_pcm_substream_t *substream,
+ snd_pcm_hw_params_t *params)
+{
+ struct aaci *aaci = substream->private_data;
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+ unsigned int channels = params_channels(params);
+ int ret;
+
+ WARN_ON(channels >= ARRAY_SIZE(channels_to_txmask) ||
+ !channels_to_txmask[channels]);
+
+ ret = aaci_pcm_hw_params(substream, aacirun, params);
+
+ /*
+ * Enable FIFO, compact mode, 16 bits per sample.
+ * FIXME: double rate slots?
+ */
+ if (ret >= 0) {
+ aacirun->cr = TXCR_FEN | TXCR_COMPACT | TXCR_TSZ16;
+ aacirun->cr |= channels_to_txmask[channels];
+
+ aacirun->fifosz = aaci->fifosize * 4;
+ if (aacirun->cr & TXCR_COMPACT)
+ aacirun->fifosz >>= 1;
+ }
+ return ret;
+}
+
+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 &= ~TXCR_TXEN;
+ aaci_chan_wait_ready(aacirun);
+ writel(aacirun->cr, aacirun->base + AACI_TXCR);
+}
+
+static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
+{
+ u32 ie;
+
+ aaci_chan_wait_ready(aacirun);
+ aacirun->cr |= TXCR_TXEN;
+
+ 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(snd_pcm_substream_t *substream, int cmd)
+{
+ struct aaci *aaci = substream->private_data;
+ struct aaci_runtime *aacirun = substream->runtime->private_data;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&aaci->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(&aaci->lock, flags);
+
+ return ret;
+}
+
+static snd_pcm_ops_t aaci_playback_ops = {
+ .open = aaci_pcm_playback_open,
+ .close = aaci_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = aaci_pcm_playback_hw_params,
+ .hw_free = aaci_pcm_hw_free,
+ .prepare = aaci_pcm_prepare,
+ .trigger = aaci_pcm_playback_trigger,
+ .pointer = aaci_pcm_pointer,
+ .mmap = aaci_pcm_mmap,
+};
+
+
+
+/*
+ * Power Management.
+ */
+#ifdef CONFIG_PM
+static int aaci_do_suspend(snd_card_t *card, unsigned int state)
+{
+ struct aaci *aaci = card->private_data;
+ if (aaci->card->power_state != SNDRV_CTL_POWER_D3cold) {
+ snd_pcm_suspend_all(aaci->pcm);
+ snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D3cold);
+ }
+ return 0;
+}
+
+static int aaci_do_resume(snd_card_t *card, unsigned int state)
+{
+ struct aaci *aaci = card->private_data;
+ if (aaci->card->power_state != SNDRV_CTL_POWER_D0) {
+ snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D0);
+ }
+ return 0;
+}
+
+static int aaci_suspend(struct amba_device *dev, u32 state)
+{
+ snd_card_t *card = amba_get_drvdata(dev);
+ return card ? aaci_do_suspend(card) : 0;
+}
+
+static int aaci_resume(struct amba_device *dev)
+{
+ snd_card_t *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] = { /* 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 ac97_bus_ops_t aaci_bus_ops = {
+ .write = aaci_ac97_write,
+ .read = aaci_ac97_read,
+};
+
+static int __devinit aaci_probe_ac97(struct aaci *aaci)
+{
+ ac97_template_t ac97_template;
+ ac97_bus_t *ac97_bus;
+ ac97_t *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(42);
+
+ 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(ac97_template_t));
+ 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;
+
+ /*
+ * 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];
+
+ out:
+ return ret;
+}
+
+static void aaci_free_card(snd_card_t *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;
+ snd_card_t *card;
+
+ card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, sizeof(struct aaci));
+ if (card == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ card->private_free = aaci_free_card;
+ snd_card_set_pm_callback(card, aaci_do_suspend, aaci_do_resume, NULL);
+
+ 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 at 0x%08lx, irq %d",
+ card->shortname, dev->res.start, dev->irq[0]);
+
+ aaci = card->private_data;
+ init_MUTEX(&aaci->ac97_sem);
+ spin_lock_init(&aaci->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)
+{
+ snd_pcm_t *pcm;
+ int ret;
+
+ ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 0, &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);
+ }
+
+ return ret;
+}
+
+static unsigned int __devinit aaci_size_fifo(struct aaci *aaci)
+{
+ void *base = aaci->base + AACI_CSCH1;
+ int i;
+
+ writel(TXCR_FEN | TXCR_TSZ16 | TXCR_TXEN, base + AACI_TXCR);
+
+ for (i = 0; !(readl(base + AACI_SR) & SR_TXFF) && i < 4096; i++)
+ writel(0, aaci->base + AACI_DR1);
+
+ writel(0, 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);
+ writel(aaci->maincr, aaci->base + AACI_MAINCR);
+
+ /*
+ * If we hit 4096, 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, void *id)
+{
+ struct aaci *aaci;
+ int ret, i;
+
+ ret = amba_request_regions(dev, NULL);
+ if (ret)
+ return ret;
+
+ aaci = aaci_init_card(dev);
+ if (IS_ERR(aaci)) {
+ ret = PTR_ERR(aaci);
+ goto out;
+ }
+
+ aaci->base = ioremap(dev->res.start, SZ_4K);
+ if (!aaci->base) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * Playback uses AACI channel 0
+ */
+ aaci->playback.base = aaci->base + AACI_CSCH1;
+ aaci->playback.fifo = aaci->base + AACI_DR1;
+
+ for (i = 0; i < 4; i++) {
+ void *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);
+
+ /*
+ * Size the FIFOs.
+ */
+ aaci->fifosize = aaci_size_fifo(aaci);
+
+ ret = aaci_probe_ac97(aaci);
+ if (ret)
+ goto out;
+
+ ret = aaci_init_pcm(aaci);
+ if (ret)
+ goto out;
+
+ ret = snd_card_register(aaci->card);
+ if (ret == 0) {
+ dev_info(&dev->dev, "%s, fifo %d\n", aaci->card->longname,
+ aaci->fifosize);
+ 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)
+{
+ snd_card_t *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 },
+};
+
+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,
+};
+
+static int __init aaci_init(void)
+{
+ return amba_driver_register(&aaci_driver);
+}
+
+static void __exit aaci_exit(void)
+{
+ amba_driver_unregister(&aaci_driver);
+}
+
+module_init(aaci_init);
+module_exit(aaci_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 04:01:04 +0000