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![viresh kumar](/assets/img/avatar_default.png)
For simple modules that contain a single amba_driver without any additional setup code then ends up being a block of duplicated boilerplate. This patch adds a new macro, module_amba_driver(), which replaces the module_init()/module_exit() registrations with template functions. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
1116 lines
25 KiB
C
1116 lines
25 KiB
C
/*
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* linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
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*
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* Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
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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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* Documentation: ARM DDI 0173B
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/amba/bus.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/ac97_codec.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "aaci.h"
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#define DRIVER_NAME "aaci-pl041"
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#define FRAME_PERIOD_US 21
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/*
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* PM support is not complete. Turn it off.
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*/
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#undef CONFIG_PM
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static void aaci_ac97_select_codec(struct aaci *aaci, struct snd_ac97 *ac97)
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{
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u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num);
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/*
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* Ensure that the slot 1/2 RX registers are empty.
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*/
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v = readl(aaci->base + AACI_SLFR);
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if (v & SLFR_2RXV)
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readl(aaci->base + AACI_SL2RX);
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if (v & SLFR_1RXV)
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readl(aaci->base + AACI_SL1RX);
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if (maincr != readl(aaci->base + AACI_MAINCR)) {
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writel(maincr, aaci->base + AACI_MAINCR);
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readl(aaci->base + AACI_MAINCR);
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udelay(1);
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}
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}
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/*
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* P29:
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* The recommended use of programming the external codec through slot 1
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* and slot 2 data is to use the channels during setup routines and the
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* slot register at any other time. The data written into slot 1, slot 2
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* and slot 12 registers is transmitted only when their corresponding
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* SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR
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* register.
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*/
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static void aaci_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
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unsigned short val)
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{
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struct aaci *aaci = ac97->private_data;
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int timeout;
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u32 v;
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if (ac97->num >= 4)
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return;
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mutex_lock(&aaci->ac97_sem);
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aaci_ac97_select_codec(aaci, ac97);
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/*
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* P54: You must ensure that AACI_SL2TX is always written
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* to, if required, before data is written to AACI_SL1TX.
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*/
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writel(val << 4, aaci->base + AACI_SL2TX);
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writel(reg << 12, aaci->base + AACI_SL1TX);
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/* Initially, wait one frame period */
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udelay(FRAME_PERIOD_US);
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/* And then wait an additional eight frame periods for it to be sent */
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timeout = FRAME_PERIOD_US * 8;
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do {
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udelay(1);
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v = readl(aaci->base + AACI_SLFR);
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} while ((v & (SLFR_1TXB|SLFR_2TXB)) && --timeout);
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if (v & (SLFR_1TXB|SLFR_2TXB))
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dev_err(&aaci->dev->dev,
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"timeout waiting for write to complete\n");
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mutex_unlock(&aaci->ac97_sem);
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}
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/*
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* Read an AC'97 register.
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*/
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static unsigned short aaci_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
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{
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struct aaci *aaci = ac97->private_data;
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int timeout, retries = 10;
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u32 v;
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if (ac97->num >= 4)
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return ~0;
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mutex_lock(&aaci->ac97_sem);
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aaci_ac97_select_codec(aaci, ac97);
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/*
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* Write the register address to slot 1.
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*/
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writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX);
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/* Initially, wait one frame period */
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udelay(FRAME_PERIOD_US);
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/* And then wait an additional eight frame periods for it to be sent */
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timeout = FRAME_PERIOD_US * 8;
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do {
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udelay(1);
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v = readl(aaci->base + AACI_SLFR);
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} while ((v & SLFR_1TXB) && --timeout);
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if (v & SLFR_1TXB) {
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dev_err(&aaci->dev->dev, "timeout on slot 1 TX busy\n");
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v = ~0;
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goto out;
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}
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/* Now wait for the response frame */
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udelay(FRAME_PERIOD_US);
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/* And then wait an additional eight frame periods for data */
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timeout = FRAME_PERIOD_US * 8;
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do {
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udelay(1);
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cond_resched();
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v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
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} while ((v != (SLFR_1RXV|SLFR_2RXV)) && --timeout);
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if (v != (SLFR_1RXV|SLFR_2RXV)) {
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dev_err(&aaci->dev->dev, "timeout on RX valid\n");
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v = ~0;
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goto out;
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}
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do {
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v = readl(aaci->base + AACI_SL1RX) >> 12;
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if (v == reg) {
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v = readl(aaci->base + AACI_SL2RX) >> 4;
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break;
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} else if (--retries) {
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dev_warn(&aaci->dev->dev,
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"ac97 read back fail. retry\n");
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continue;
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} else {
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dev_warn(&aaci->dev->dev,
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"wrong ac97 register read back (%x != %x)\n",
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v, reg);
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v = ~0;
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}
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} while (retries);
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out:
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mutex_unlock(&aaci->ac97_sem);
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return v;
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}
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static inline void
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aaci_chan_wait_ready(struct aaci_runtime *aacirun, unsigned long mask)
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{
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u32 val;
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int timeout = 5000;
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do {
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udelay(1);
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val = readl(aacirun->base + AACI_SR);
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} while (val & mask && timeout--);
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}
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/*
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* Interrupt support.
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*/
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static void aaci_fifo_irq(struct aaci *aaci, int channel, u32 mask)
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{
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if (mask & ISR_ORINTR) {
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dev_warn(&aaci->dev->dev, "RX overrun on chan %d\n", channel);
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writel(ICLR_RXOEC1 << channel, aaci->base + AACI_INTCLR);
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}
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if (mask & ISR_RXTOINTR) {
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dev_warn(&aaci->dev->dev, "RX timeout on chan %d\n", channel);
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writel(ICLR_RXTOFEC1 << channel, aaci->base + AACI_INTCLR);
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}
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if (mask & ISR_RXINTR) {
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struct aaci_runtime *aacirun = &aaci->capture;
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bool period_elapsed = false;
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void *ptr;
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if (!aacirun->substream || !aacirun->start) {
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dev_warn(&aaci->dev->dev, "RX interrupt???\n");
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writel(0, aacirun->base + AACI_IE);
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return;
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}
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spin_lock(&aacirun->lock);
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ptr = aacirun->ptr;
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do {
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unsigned int len = aacirun->fifo_bytes;
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u32 val;
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if (aacirun->bytes <= 0) {
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aacirun->bytes += aacirun->period;
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period_elapsed = true;
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}
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if (!(aacirun->cr & CR_EN))
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break;
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val = readl(aacirun->base + AACI_SR);
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if (!(val & SR_RXHF))
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break;
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if (!(val & SR_RXFF))
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len >>= 1;
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aacirun->bytes -= len;
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/* reading 16 bytes at a time */
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for( ; len > 0; len -= 16) {
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asm(
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"ldmia %1, {r0, r1, r2, r3}\n\t"
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"stmia %0!, {r0, r1, r2, r3}"
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: "+r" (ptr)
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: "r" (aacirun->fifo)
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: "r0", "r1", "r2", "r3", "cc");
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if (ptr >= aacirun->end)
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ptr = aacirun->start;
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}
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} while(1);
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aacirun->ptr = ptr;
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spin_unlock(&aacirun->lock);
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if (period_elapsed)
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snd_pcm_period_elapsed(aacirun->substream);
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}
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if (mask & ISR_URINTR) {
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dev_dbg(&aaci->dev->dev, "TX underrun on chan %d\n", channel);
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writel(ICLR_TXUEC1 << channel, aaci->base + AACI_INTCLR);
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}
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if (mask & ISR_TXINTR) {
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struct aaci_runtime *aacirun = &aaci->playback;
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bool period_elapsed = false;
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void *ptr;
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if (!aacirun->substream || !aacirun->start) {
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dev_warn(&aaci->dev->dev, "TX interrupt???\n");
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writel(0, aacirun->base + AACI_IE);
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return;
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}
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spin_lock(&aacirun->lock);
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ptr = aacirun->ptr;
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do {
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unsigned int len = aacirun->fifo_bytes;
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u32 val;
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if (aacirun->bytes <= 0) {
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aacirun->bytes += aacirun->period;
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period_elapsed = true;
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}
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if (!(aacirun->cr & CR_EN))
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break;
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val = readl(aacirun->base + AACI_SR);
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if (!(val & SR_TXHE))
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break;
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if (!(val & SR_TXFE))
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len >>= 1;
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aacirun->bytes -= len;
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/* writing 16 bytes at a time */
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for ( ; len > 0; len -= 16) {
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asm(
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"ldmia %0!, {r0, r1, r2, r3}\n\t"
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"stmia %1, {r0, r1, r2, r3}"
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: "+r" (ptr)
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: "r" (aacirun->fifo)
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: "r0", "r1", "r2", "r3", "cc");
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if (ptr >= aacirun->end)
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ptr = aacirun->start;
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}
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} while (1);
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aacirun->ptr = ptr;
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spin_unlock(&aacirun->lock);
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if (period_elapsed)
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snd_pcm_period_elapsed(aacirun->substream);
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}
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}
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static irqreturn_t aaci_irq(int irq, void *devid)
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{
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struct aaci *aaci = devid;
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u32 mask;
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int i;
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mask = readl(aaci->base + AACI_ALLINTS);
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if (mask) {
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u32 m = mask;
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for (i = 0; i < 4; i++, m >>= 7) {
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if (m & 0x7f) {
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aaci_fifo_irq(aaci, i, m);
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}
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}
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}
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return mask ? IRQ_HANDLED : IRQ_NONE;
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}
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/*
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* ALSA support.
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*/
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static struct snd_pcm_hardware aaci_hw_info = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_RESUME,
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/*
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* ALSA doesn't support 18-bit or 20-bit packed into 32-bit
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* words. It also doesn't support 12-bit at all.
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*/
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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/* rates are setup from the AC'97 codec */
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = 64 * 1024,
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.period_bytes_min = 256,
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.period_bytes_max = PAGE_SIZE,
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.periods_min = 4,
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.periods_max = PAGE_SIZE / 16,
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};
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/*
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* We can support two and four channel audio. Unfortunately
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* six channel audio requires a non-standard channel ordering:
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* 2 -> FL(3), FR(4)
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* 4 -> FL(3), FR(4), SL(7), SR(8)
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* 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required)
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* FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual)
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* This requires an ALSA configuration file to correct.
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*/
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static int aaci_rule_channels(struct snd_pcm_hw_params *p,
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struct snd_pcm_hw_rule *rule)
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{
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static unsigned int channel_list[] = { 2, 4, 6 };
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struct aaci *aaci = rule->private;
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unsigned int mask = 1 << 0, slots;
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/* pcms[0] is the our 5.1 PCM instance. */
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slots = aaci->ac97_bus->pcms[0].r[0].slots;
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if (slots & (1 << AC97_SLOT_PCM_SLEFT)) {
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mask |= 1 << 1;
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if (slots & (1 << AC97_SLOT_LFE))
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mask |= 1 << 2;
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}
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return snd_interval_list(hw_param_interval(p, rule->var),
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ARRAY_SIZE(channel_list), channel_list, mask);
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}
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static int aaci_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct aaci *aaci = substream->private_data;
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struct aaci_runtime *aacirun;
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int ret = 0;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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aacirun = &aaci->playback;
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} else {
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aacirun = &aaci->capture;
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}
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aacirun->substream = substream;
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runtime->private_data = aacirun;
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runtime->hw = aaci_hw_info;
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runtime->hw.rates = aacirun->pcm->rates;
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snd_pcm_limit_hw_rates(runtime);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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runtime->hw.channels_max = 6;
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/* Add rule describing channel dependency. */
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ret = snd_pcm_hw_rule_add(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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aaci_rule_channels, aaci,
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SNDRV_PCM_HW_PARAM_CHANNELS, -1);
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if (ret)
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return ret;
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if (aacirun->pcm->r[1].slots)
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snd_ac97_pcm_double_rate_rules(runtime);
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}
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/*
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* ALSA wants the byte-size of the FIFOs. As we only support
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* 16-bit samples, this is twice the FIFO depth irrespective
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* of whether it's in compact mode or not.
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*/
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runtime->hw.fifo_size = aaci->fifo_depth * 2;
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mutex_lock(&aaci->irq_lock);
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if (!aaci->users++) {
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ret = request_irq(aaci->dev->irq[0], aaci_irq,
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IRQF_SHARED, DRIVER_NAME, aaci);
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if (ret != 0)
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aaci->users--;
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}
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mutex_unlock(&aaci->irq_lock);
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return ret;
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}
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|
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/*
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* Common ALSA stuff
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*/
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static int aaci_pcm_close(struct snd_pcm_substream *substream)
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{
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struct aaci *aaci = substream->private_data;
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struct aaci_runtime *aacirun = substream->runtime->private_data;
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WARN_ON(aacirun->cr & CR_EN);
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aacirun->substream = NULL;
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mutex_lock(&aaci->irq_lock);
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if (!--aaci->users)
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free_irq(aaci->dev->irq[0], aaci);
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mutex_unlock(&aaci->irq_lock);
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return 0;
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}
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static int aaci_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct aaci_runtime *aacirun = substream->runtime->private_data;
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|
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/*
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* This must not be called with the device enabled.
|
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*/
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WARN_ON(aacirun->cr & CR_EN);
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|
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if (aacirun->pcm_open)
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snd_ac97_pcm_close(aacirun->pcm);
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aacirun->pcm_open = 0;
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/*
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* Clear out the DMA and any allocated buffers.
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*/
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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|
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/* Channel to slot mask */
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static const u32 channels_to_slotmask[] = {
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[2] = CR_SL3 | CR_SL4,
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[4] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8,
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[6] = CR_SL3 | CR_SL4 | CR_SL7 | CR_SL8 | CR_SL6 | CR_SL9,
|
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};
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|
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static int aaci_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
|
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{
|
|
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");
|