- 根目录:
- sound
- mips
- hal2.c
/*
* Driver for A2 audio system used in SGI machines
* Copyright (c) 2008 Thomas Bogendoerfer <tsbogend@alpha.fanken.de>
*
* Based on OSS code from Ladislav Michl <ladis@linux-mips.org>, which
* was based on code from Ulf Carlsson
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ip22.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm-indirect.h>
#include <sound/initval.h>
#include "hal2.h"
static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for SGI HAL2 soundcard.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for SGI HAL2 soundcard.");
MODULE_DESCRIPTION("ALSA driver for SGI HAL2 audio");
MODULE_AUTHOR("Thomas Bogendoerfer");
MODULE_LICENSE("GPL");
#define H2_BLOCK_SIZE 1024
#define H2_BUF_SIZE 16384
struct hal2_pbus {
struct hpc3_pbus_dmacregs *pbus;
int pbusnr;
unsigned int ctrl; /* Current state of pbus->pbdma_ctrl */
};
struct hal2_desc {
struct hpc_dma_desc desc;
u32 pad; /* padding */
};
struct hal2_codec {
struct snd_pcm_indirect pcm_indirect;
struct snd_pcm_substream *substream;
unsigned char *buffer;
dma_addr_t buffer_dma;
struct hal2_desc *desc;
dma_addr_t desc_dma;
int desc_count;
struct hal2_pbus pbus;
int voices; /* mono/stereo */
unsigned int sample_rate;
unsigned int master; /* Master frequency */
unsigned short mod; /* MOD value */
unsigned short inc; /* INC value */
};
#define H2_MIX_OUTPUT_ATT 0
#define H2_MIX_INPUT_GAIN 1
struct snd_hal2 {
struct snd_card *card;
struct hal2_ctl_regs *ctl_regs; /* HAL2 ctl registers */
struct hal2_aes_regs *aes_regs; /* HAL2 aes registers */
struct hal2_vol_regs *vol_regs; /* HAL2 vol registers */
struct hal2_syn_regs *syn_regs; /* HAL2 syn registers */
struct hal2_codec dac;
struct hal2_codec adc;
};
#define H2_INDIRECT_WAIT(regs) while (hal2_read(®s->isr) & H2_ISR_TSTATUS);
#define H2_READ_ADDR(addr) (addr | (1<<7))
#define H2_WRITE_ADDR(addr) (addr)
static inline u32 hal2_read(u32 *reg)
{
return __raw_readl(reg);
}
static inline void hal2_write(u32 val, u32 *reg)
{
__raw_writel(val, reg);
}
static u32 hal2_i_read32(struct snd_hal2 *hal2, u16 addr)
{
u32 ret;
struct hal2_ctl_regs *regs = hal2->ctl_regs;
hal2_write(H2_READ_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
ret = hal2_read(®s->idr0) & 0xffff;
hal2_write(H2_READ_ADDR(addr) | 0x1, ®s->iar);
H2_INDIRECT_WAIT(regs);
ret |= (hal2_read(®s->idr0) & 0xffff) << 16;
return ret;
}
static void hal2_i_write16(struct snd_hal2 *hal2, u16 addr, u16 val)
{
struct hal2_ctl_regs *regs = hal2->ctl_regs;
hal2_write(val, ®s->idr0);
hal2_write(0, ®s->idr1);
hal2_write(0, ®s->idr2);
hal2_write(0, ®s->idr3);
hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
}
static void hal2_i_write32(struct snd_hal2 *hal2, u16 addr, u32 val)
{
struct hal2_ctl_regs *regs = hal2->ctl_regs;
hal2_write(val & 0xffff, ®s->idr0);
hal2_write(val >> 16, ®s->idr1);
hal2_write(0, ®s->idr2);
hal2_write(0, ®s->idr3);
hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
}
static void hal2_i_setbit16(struct snd_hal2 *hal2, u16 addr, u16 bit)
{
struct hal2_ctl_regs *regs = hal2->ctl_regs;
hal2_write(H2_READ_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
hal2_write((hal2_read(®s->idr0) & 0xffff) | bit, ®s->idr0);
hal2_write(0, ®s->idr1);
hal2_write(0, ®s->idr2);
hal2_write(0, ®s->idr3);
hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
}
static void hal2_i_clearbit16(struct snd_hal2 *hal2, u16 addr, u16 bit)
{
struct hal2_ctl_regs *regs = hal2->ctl_regs;
hal2_write(H2_READ_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
hal2_write((hal2_read(®s->idr0) & 0xffff) & ~bit, ®s->idr0);
hal2_write(0, ®s->idr1);
hal2_write(0, ®s->idr2);
hal2_write(0, ®s->idr3);
hal2_write(H2_WRITE_ADDR(addr), ®s->iar);
H2_INDIRECT_WAIT(regs);
}
static int hal2_gain_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 2;
uinfo->value.integer.min = 0;
switch ((int)kcontrol->private_value) {
case H2_MIX_OUTPUT_ATT:
uinfo->value.integer.max = 31;
break;
case H2_MIX_INPUT_GAIN:
uinfo->value.integer.max = 15;
break;
}
return 0;
}
static int hal2_gain_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol);
u32 tmp;
int l, r;
switch ((int)kcontrol->private_value) {
case H2_MIX_OUTPUT_ATT:
tmp = hal2_i_read32(hal2, H2I_DAC_C2);
if (tmp & H2I_C2_MUTE) {
l = 0;
r = 0;
} else {
l = 31 - ((tmp >> H2I_C2_L_ATT_SHIFT) & 31);
r = 31 - ((tmp >> H2I_C2_R_ATT_SHIFT) & 31);
}
break;
case H2_MIX_INPUT_GAIN:
tmp = hal2_i_read32(hal2, H2I_ADC_C2);
l = (tmp >> H2I_C2_L_GAIN_SHIFT) & 15;
r = (tmp >> H2I_C2_R_GAIN_SHIFT) & 15;
break;
}
ucontrol->value.integer.value[0] = l;
ucontrol->value.integer.value[1] = r;
return 0;
}
static int hal2_gain_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol);
u32 old, new;
int l, r;
l = ucontrol->value.integer.value[0];
r = ucontrol->value.integer.value[1];
switch ((int)kcontrol->private_value) {
case H2_MIX_OUTPUT_ATT:
old = hal2_i_read32(hal2, H2I_DAC_C2);
new = old & ~(H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
if (l | r) {
l = 31 - l;
r = 31 - r;
new |= (l << H2I_C2_L_ATT_SHIFT);
new |= (r << H2I_C2_R_ATT_SHIFT);
} else
new |= H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE;
hal2_i_write32(hal2, H2I_DAC_C2, new);
break;
case H2_MIX_INPUT_GAIN:
old = hal2_i_read32(hal2, H2I_ADC_C2);
new = old & ~(H2I_C2_L_GAIN_M | H2I_C2_R_GAIN_M);
new |= (l << H2I_C2_L_GAIN_SHIFT);
new |= (r << H2I_C2_R_GAIN_SHIFT);
hal2_i_write32(hal2, H2I_ADC_C2, new);
break;
}
return old != new;
}
static struct snd_kcontrol_new hal2_ctrl_headphone = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Headphone Playback Volume",
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = H2_MIX_OUTPUT_ATT,
.info = hal2_gain_info,
.get = hal2_gain_get,
.put = hal2_gain_put,
};
static struct snd_kcontrol_new hal2_ctrl_mic = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Mic Capture Volume",
.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
.private_value = H2_MIX_INPUT_GAIN,
.info = hal2_gain_info,
.get = hal2_gain_get,
.put = hal2_gain_put,
};
static int hal2_mixer_create(struct snd_hal2 *hal2)
{
int err;
/* mute DAC */
hal2_i_write32(hal2, H2I_DAC_C2,
H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
/* mute ADC */
hal2_i_write32(hal2, H2I_ADC_C2, 0);
err = snd_ctl_add(hal2->card,
snd_ctl_new1(&hal2_ctrl_headphone, hal2));
if (err < 0)
return err;
err = snd_ctl_add(hal2->card,
snd_ctl_new1(&hal2_ctrl_mic, hal2));
if (err < 0)
return err;
return 0;
}
static irqreturn_t hal2_interrupt(int irq, void *dev_id)
{
struct snd_hal2 *hal2 = dev_id;
irqreturn_t ret = IRQ_NONE;
/* decide what caused this interrupt */
if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
snd_pcm_period_elapsed(hal2->dac.substream);
ret = IRQ_HANDLED;
}
if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
snd_pcm_period_elapsed(hal2->adc.substream);
ret = IRQ_HANDLED;
}
return ret;
}
static int hal2_compute_rate(struct hal2_codec *codec, unsigned int rate)
{
unsigned short mod;
if (44100 % rate < 48000 % rate) {
mod = 4 * 44100 / rate;
codec->master = 44100;
} else {
mod = 4 * 48000 / rate;
codec->master = 48000;
}
codec->inc = 4;
codec->mod = mod;
rate = 4 * codec->master / mod;
return rate;
}
static void hal2_set_dac_rate(struct snd_hal2 *hal2)
{
unsigned int master = hal2->dac.master;
int inc = hal2->dac.inc;
int mod = hal2->dac.mod;
hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0);
hal2_i_write32(hal2, H2I_BRES1_C2,
((0xffff & (inc - mod - 1)) << 16) | inc);
}
static void hal2_set_adc_rate(struct snd_hal2 *hal2)
{
unsigned int master = hal2->adc.master;
int inc = hal2->adc.inc;
int mod = hal2->adc.mod;
hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0);
hal2_i_write32(hal2, H2I_BRES2_C2,
((0xffff & (inc - mod - 1)) << 16) | inc);
}
static void hal2_setup_dac(struct snd_hal2 *hal2)
{
unsigned int fifobeg, fifoend, highwater, sample_size;
struct hal2_pbus *pbus = &hal2->dac.pbus;
/* Now we set up some PBUS information. The PBUS needs information about
* what portion of the fifo it will use. If it's receiving or
* transmitting, and finally whether the stream is little endian or big
* endian. The information is written later, on the start call.
*/
sample_size = 2 * hal2->dac.voices;
/* Fifo should be set to hold exactly four samples. Highwater mark
* should be set to two samples. */
highwater = (sample_size * 2) >> 1; /* halfwords */
fifobeg = 0; /* playback is first */
fifoend = (sample_size * 4) >> 3; /* doublewords */
pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD |
(highwater << 8) | (fifobeg << 16) | (fifoend << 24);
/* We disable everything before we do anything at all */
pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
/* Setup the HAL2 for playback */
hal2_set_dac_rate(hal2);
/* Set endianess */
hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
/* Set DMA bus */
hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
/* We are using 1st Bresenham clock generator for playback */
hal2_i_write16(hal2, H2I_DAC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
| (1 << H2I_C1_CLKID_SHIFT)
| (hal2->dac.voices << H2I_C1_DATAT_SHIFT));
}
static void hal2_setup_adc(struct snd_hal2 *hal2)
{
unsigned int fifobeg, fifoend, highwater, sample_size;
struct hal2_pbus *pbus = &hal2->adc.pbus;
sample_size = 2 * hal2->adc.voices;
highwater = (sample_size * 2) >> 1; /* halfwords */
fifobeg = (4 * 4) >> 3; /* record is second */
fifoend = (4 * 4 + sample_size * 4) >> 3; /* doublewords */
pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD |
(highwater << 8) | (fifobeg << 16) | (fifoend << 24);
pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
/* Setup the HAL2 for record */
hal2_set_adc_rate(hal2);
/* Set endianess */
hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
/* Set DMA bus */
hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
/* We are using 2nd Bresenham clock generator for record */
hal2_i_write16(hal2, H2I_ADC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
| (2 << H2I_C1_CLKID_SHIFT)
| (hal2->adc.voices << H2I_C1_DATAT_SHIFT));
}
static void hal2_start_dac(struct snd_hal2 *hal2)
{
struct hal2_pbus *pbus = &hal2->dac.pbus;
pbus->pbus->pbdma_dptr = hal2->dac.desc_dma;
pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
/* enable DAC */
hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
}
static void hal2_start_adc(struct snd_hal2 *hal2)
{
struct hal2_pbus *pbus = &hal2->adc.pbus;
pbus->pbus->pbdma_dptr = hal2->adc.desc_dma;
pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
/* enable ADC */
hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
}
static inline void hal2_stop_dac(struct snd_hal2 *hal2)
{
hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
/* The HAL2 itself may remain enabled safely */
}
static inline void hal2_stop_adc(struct snd_hal2 *hal2)
{
hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
}
static int hal2_alloc_dmabuf(struct hal2_codec *codec)
{
struct hal2_desc *desc;
dma_addr_t desc_dma, buffer_dma;
int count = H2_BUF_SIZE / H2_BLOCK_SIZE;
int i;
codec->buffer = dma_alloc_noncoherent(NULL, H2_BUF_SIZE,
&buffer_dma, GFP_KERNEL);
if (!codec->buffer)
return -ENOMEM;
desc = dma_alloc_noncoherent(NULL, count * sizeof(struct hal2_desc),
&desc_dma, GFP_KERNEL);
if (!desc) {
dma_free_noncoherent(NULL, H2_BUF_SIZE,
codec->buffer, buffer_dma);
return -ENOMEM;
}
codec->buffer_dma = buffer_dma;
codec->desc_dma = desc_dma;
codec->desc = desc;
for (i = 0; i < count; i++) {
desc->desc.pbuf = buffer_dma + i * H2_BLOCK_SIZE;
desc->desc.cntinfo = HPCDMA_XIE | H2_BLOCK_SIZE;
desc->desc.pnext = (i == count - 1) ?
desc_dma : desc_dma + (i + 1) * sizeof(struct hal2_desc);
desc++;
}
dma_cache_sync(NULL, codec->desc, count * sizeof(struct hal2_desc),
DMA_TO_DEVICE);
codec->desc_count = count;
return 0;
}
static void hal2_free_dmabuf(struct hal2_codec *codec)
{
dma_free_noncoherent(NULL, codec->desc_count * sizeof(struct hal2_desc),
codec->desc, codec->desc_dma);
dma_free_noncoherent(NULL, H2_BUF_SIZE, codec->buffer,
codec->buffer_dma);
}
static struct snd_pcm_hardware hal2_pcm_hw = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER),
.formats = SNDRV_PCM_FMTBIT_S16_BE,
.rates = SNDRV_PCM_RATE_8000_48000,
.rate_min = 8000,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = 65536,
.period_bytes_min = 1024,
.period_bytes_max = 65536,
.periods_min = 2,
.periods_max = 1024,
};
static int hal2_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
int err;
err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
if (err < 0)
return err;
return 0;
}
static int hal2_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static int hal2_playback_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
int err;
runtime->hw = hal2_pcm_hw;
err = hal2_alloc_dmabuf(&hal2->dac);
if (err)
return err;
return 0;
}
static int hal2_playback_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
hal2_free_dmabuf(&hal2->dac);
return 0;
}
static int hal2_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct hal2_codec *dac = &hal2->dac;
dac->voices = runtime->channels;
dac->sample_rate = hal2_compute_rate(dac, runtime->rate);
memset(&dac->pcm_indirect, 0, sizeof(dac->pcm_indirect));
dac->pcm_indirect.hw_buffer_size = H2_BUF_SIZE;
dac->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
dac->substream = substream;
hal2_setup_dac(hal2);
return 0;
}
static int hal2_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
hal2->dac.pcm_indirect.hw_io = hal2->dac.buffer_dma;
hal2->dac.pcm_indirect.hw_data = 0;
substream->ops->ack(substream);
hal2_start_dac(hal2);
break;
case SNDRV_PCM_TRIGGER_STOP:
hal2_stop_dac(hal2);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t
hal2_playback_pointer(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *dac = &hal2->dac;
return snd_pcm_indirect_playback_pointer(substream, &dac->pcm_indirect,
dac->pbus.pbus->pbdma_bptr);
}
static void hal2_playback_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, size_t bytes)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
unsigned char *buf = hal2->dac.buffer + rec->hw_data;
memcpy(buf, substream->runtime->dma_area + rec->sw_data, bytes);
dma_cache_sync(NULL, buf, bytes, DMA_TO_DEVICE);
}
static int hal2_playback_ack(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *dac = &hal2->dac;
dac->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2;
snd_pcm_indirect_playback_transfer(substream,
&dac->pcm_indirect,
hal2_playback_transfer);
return 0;
}
static int hal2_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *adc = &hal2->adc;
int err;
runtime->hw = hal2_pcm_hw;
err = hal2_alloc_dmabuf(adc);
if (err)
return err;
return 0;
}
static int hal2_capture_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
hal2_free_dmabuf(&hal2->adc);
return 0;
}
static int hal2_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct hal2_codec *adc = &hal2->adc;
adc->voices = runtime->channels;
adc->sample_rate = hal2_compute_rate(adc, runtime->rate);
memset(&adc->pcm_indirect, 0, sizeof(adc->pcm_indirect));
adc->pcm_indirect.hw_buffer_size = H2_BUF_SIZE;
adc->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2;
adc->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
adc->substream = substream;
hal2_setup_adc(hal2);
return 0;
}
static int hal2_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
hal2->adc.pcm_indirect.hw_io = hal2->adc.buffer_dma;
hal2->adc.pcm_indirect.hw_data = 0;
printk(KERN_DEBUG "buffer_dma %x\n", hal2->adc.buffer_dma);
hal2_start_adc(hal2);
break;
case SNDRV_PCM_TRIGGER_STOP:
hal2_stop_adc(hal2);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t
hal2_capture_pointer(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *adc = &hal2->adc;
return snd_pcm_indirect_capture_pointer(substream, &adc->pcm_indirect,
adc->pbus.pbus->pbdma_bptr);
}
static void hal2_capture_transfer(struct snd_pcm_substream *substream,
struct snd_pcm_indirect *rec, size_t bytes)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
unsigned char *buf = hal2->adc.buffer + rec->hw_data;
dma_cache_sync(NULL, buf, bytes, DMA_FROM_DEVICE);
memcpy(substream->runtime->dma_area + rec->sw_data, buf, bytes);
}
static int hal2_capture_ack(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *adc = &hal2->adc;
snd_pcm_indirect_capture_transfer(substream,
&adc->pcm_indirect,
hal2_capture_transfer);
return 0;
}
static struct snd_pcm_ops hal2_playback_ops = {
.open = hal2_playback_open,
.close = hal2_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = hal2_pcm_hw_params,
.hw_free = hal2_pcm_hw_free,
.prepare = hal2_playback_prepare,
.trigger = hal2_playback_trigger,
.pointer = hal2_playback_pointer,
.ack = hal2_playback_ack,
};
static struct snd_pcm_ops hal2_capture_ops = {
.open = hal2_capture_open,
.close = hal2_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = hal2_pcm_hw_params,
.hw_free = hal2_pcm_hw_free,
.prepare = hal2_capture_prepare,
.trigger = hal2_capture_trigger,
.pointer = hal2_capture_pointer,
.ack = hal2_capture_ack,
};
static int hal2_pcm_create(struct snd_hal2 *hal2)
{
struct snd_pcm *pcm;
int err;
/* create first pcm device with one outputs and one input */
err = snd_pcm_new(hal2->card, "SGI HAL2 Audio", 0, 1, 1, &pcm);
if (err < 0)
return err;
pcm->private_data = hal2;
strcpy(pcm->name, "SGI HAL2");
/* set operators */
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
&hal2_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
&hal2_capture_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
0, 1024 * 1024);
return 0;
}
static int hal2_dev_free(struct snd_device *device)
{
struct snd_hal2 *hal2 = device->device_data;
free_irq(SGI_HPCDMA_IRQ, hal2);
kfree(hal2);
return 0;
}
static struct snd_device_ops hal2_ops = {
.dev_free = hal2_dev_free,
};
static void hal2_init_codec(struct hal2_codec *codec, struct hpc3_regs *hpc3,
int index)
{
codec->pbus.pbusnr = index;
codec->pbus.pbus = &hpc3->pbdma[index];
}
static int hal2_detect(struct snd_hal2 *hal2)
{
unsigned short board, major, minor;
unsigned short rev;
/* reset HAL2 */
hal2_write(0, &hal2->ctl_regs->isr);
/* release reset */
hal2_write(H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N,
&hal2->ctl_regs->isr);
hal2_i_write16(hal2, H2I_RELAY_C, H2I_RELAY_C_STATE);
rev = hal2_read(&hal2->ctl_regs->rev);
if (rev & H2_REV_AUDIO_PRESENT)
return -ENODEV;
board = (rev & H2_REV_BOARD_M) >> 12;
major = (rev & H2_REV_MAJOR_CHIP_M) >> 4;
minor = (rev & H2_REV_MINOR_CHIP_M);
printk(KERN_INFO "SGI HAL2 revision %i.%i.%i\n",
board, major, minor);
return 0;
}
static int hal2_create(struct snd_card *card, struct snd_hal2 **rchip)
{
struct snd_hal2 *hal2;
struct hpc3_regs *hpc3 = hpc3c0;
int err;
hal2 = kzalloc(sizeof(struct snd_hal2), GFP_KERNEL);
if (!hal2)
return -ENOMEM;
hal2->card = card;
if (request_irq(SGI_HPCDMA_IRQ, hal2_interrupt, IRQF_SHARED,
"SGI HAL2", hal2)) {
printk(KERN_ERR "HAL2: Can't get irq %d\n", SGI_HPCDMA_IRQ);
kfree(hal2);
return -EAGAIN;
}
hal2->ctl_regs = (struct hal2_ctl_regs *)hpc3->pbus_extregs[0];
hal2->aes_regs = (struct hal2_aes_regs *)hpc3->pbus_extregs[1];
hal2->vol_regs = (struct hal2_vol_regs *)hpc3->pbus_extregs[2];
hal2->syn_regs = (struct hal2_syn_regs *)hpc3->pbus_extregs[3];
if (hal2_detect(hal2) < 0) {
kfree(hal2);
return -ENODEV;
}
hal2_init_codec(&hal2->dac, hpc3, 0);
hal2_init_codec(&hal2->adc, hpc3, 1);
/*
* All DMA channel interfaces in HAL2 are designed to operate with
* PBUS programmed for 2 cycles in D3, 2 cycles in D4 and 2 cycles
* in D5. HAL2 is a 16-bit device which can accept both big and little
* endian format. It assumes that even address bytes are on high
* portion of PBUS (15:8) and assumes that HPC3 is programmed to
* accept a live (unsynchronized) version of P_DREQ_N from HAL2.
*/
#define HAL2_PBUS_DMACFG ((0 << HPC3_DMACFG_D3R_SHIFT) | \
(2 << HPC3_DMACFG_D4R_SHIFT) | \
(2 << HPC3_DMACFG_D5R_SHIFT) | \
(0 << HPC3_DMACFG_D3W_SHIFT) | \
(2 << HPC3_DMACFG_D4W_SHIFT) | \
(2 << HPC3_DMACFG_D5W_SHIFT) | \
HPC3_DMACFG_DS16 | \
HPC3_DMACFG_EVENHI | \
HPC3_DMACFG_RTIME | \
(8 << HPC3_DMACFG_BURST_SHIFT) | \
HPC3_DMACFG_DRQLIVE)
/*
* Ignore what's mentioned in the specification and write value which
* works in The Real World (TM)
*/
hpc3->pbus_dmacfg[hal2->dac.pbus.pbusnr][0] = 0x8208844;
hpc3->pbus_dmacfg[hal2->adc.pbus.pbusnr][0] = 0x8208844;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, hal2, &hal2_ops);
if (err < 0) {
free_irq(SGI_HPCDMA_IRQ, hal2);
kfree(hal2);
return err;
}
*rchip = hal2;
return 0;
}
static int hal2_probe(struct platform_device *pdev)
{
struct snd_card *card;
struct snd_hal2 *chip;
int err;
err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card);
if (err < 0)
return err;
err = hal2_create(card, &chip);
if (err < 0) {
snd_card_free(card);
return err;
}
err = hal2_pcm_create(chip);
if (err < 0) {
snd_card_free(card);
return err;
}
err = hal2_mixer_create(chip);
if (err < 0) {
snd_card_free(card);
return err;
}
strcpy(card->driver, "SGI HAL2 Audio");
strcpy(card->shortname, "SGI HAL2 Audio");
sprintf(card->longname, "%s irq %i",
card->shortname,
SGI_HPCDMA_IRQ);
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
return err;
}
platform_set_drvdata(pdev, card);
return 0;
}
static int hal2_remove(struct platform_device *pdev)
{
struct snd_card *card = platform_get_drvdata(pdev);
snd_card_free(card);
return 0;
}
static struct platform_driver hal2_driver = {
.probe = hal2_probe,
.remove = hal2_remove,
.driver = {
.name = "sgihal2",
}
};
module_platform_driver(hal2_driver);