Revision af8f3f514d193eb353f9b6cea503c55d074e6153 authored by Hanjun Guo on 04 January 2015, 10:55:02 UTC, committed by Rafael J. Wysocki on 05 January 2015, 22:32:42 UTC
apic_id in MADT table is the CPU hardware id which identify it self in the system for x86 and ia64, OSPM will use it for SMP init to map APIC ID to logical cpu number in the early boot, when the DSDT/SSDT (ACPI namespace) is scanned later, the ACPI processor driver is probed and the driver will use acpi_id in DSDT to get the apic_id, then map to the logical cpu number which is needed by the processor driver. Before ACPI 5.0, only x86 and ia64 were supported in ACPI spec, so apic_id is used both in arch code and ACPI core which is pretty fine. Since ACPI 5.0, ARM is supported by ACPI and APIC is not available on ARM, this will confuse people when apic_id is both used by x86 and ARM in one function. So convert apic_id to phys_id (which is the original meaning) in ACPI processor dirver to make it arch agnostic, but leave the arch dependent code unchanged, no functional change. Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1 parent b7392d2
vidc.c
/*
* linux/drivers/sound/vidc.c
*
* Copyright (C) 1997-2000 by Russell King <rmk@arm.linux.org.uk>
*
* 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.
*
* VIDC20 audio driver.
*
* The VIDC20 sound hardware consists of the VIDC20 itself, a DAC and a DMA
* engine. The DMA transfers fixed-format (16-bit little-endian linear)
* samples to the VIDC20, which then transfers this data serially to the
* DACs. The samplerate is controlled by the VIDC.
*
* We currently support a mixer device, but it is currently non-functional.
*/
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <mach/hardware.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/hardware/iomd.h>
#include <asm/irq.h>
#include "sound_config.h"
#include "vidc.h"
#ifndef _SIOC_TYPE
#define _SIOC_TYPE(x) _IOC_TYPE(x)
#endif
#ifndef _SIOC_NR
#define _SIOC_NR(x) _IOC_NR(x)
#endif
#define VIDC_SOUND_CLOCK (250000)
#define VIDC_SOUND_CLOCK_EXT (176400)
/*
* When using SERIAL SOUND mode (external DAC), the number of physical
* channels is fixed at 2.
*/
static int vidc_busy;
static int vidc_adev;
static int vidc_audio_rate;
static char vidc_audio_format;
static char vidc_audio_channels;
static unsigned char vidc_level_l[SOUND_MIXER_NRDEVICES] = {
85, /* master */
50, /* bass */
50, /* treble */
0, /* synth */
75, /* pcm */
0, /* speaker */
100, /* ext line */
0, /* mic */
100, /* CD */
0,
};
static unsigned char vidc_level_r[SOUND_MIXER_NRDEVICES] = {
85, /* master */
50, /* bass */
50, /* treble */
0, /* synth */
75, /* pcm */
0, /* speaker */
100, /* ext line */
0, /* mic */
100, /* CD */
0,
};
static unsigned int vidc_audio_volume_l; /* left PCM vol, 0 - 65536 */
static unsigned int vidc_audio_volume_r; /* right PCM vol, 0 - 65536 */
extern void vidc_update_filler(int bits, int channels);
extern int softoss_dev;
static void
vidc_mixer_set(int mdev, unsigned int level)
{
unsigned int lev_l = level & 0x007f;
unsigned int lev_r = (level & 0x7f00) >> 8;
unsigned int mlev_l, mlev_r;
if (lev_l > 100)
lev_l = 100;
if (lev_r > 100)
lev_r = 100;
#define SCALE(lev,master) ((lev) * (master) * 65536 / 10000)
mlev_l = vidc_level_l[SOUND_MIXER_VOLUME];
mlev_r = vidc_level_r[SOUND_MIXER_VOLUME];
switch (mdev) {
case SOUND_MIXER_VOLUME:
case SOUND_MIXER_PCM:
vidc_level_l[mdev] = lev_l;
vidc_level_r[mdev] = lev_r;
vidc_audio_volume_l = SCALE(lev_l, mlev_l);
vidc_audio_volume_r = SCALE(lev_r, mlev_r);
/*printk("VIDC: PCM vol %05X %05X\n", vidc_audio_volume_l, vidc_audio_volume_r);*/
break;
}
#undef SCALE
}
static int vidc_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
{
unsigned int val;
unsigned int mdev;
if (_SIOC_TYPE(cmd) != 'M')
return -EINVAL;
mdev = _SIOC_NR(cmd);
if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
if (get_user(val, (unsigned int __user *)arg))
return -EFAULT;
if (mdev < SOUND_MIXER_NRDEVICES)
vidc_mixer_set(mdev, val);
else
return -EINVAL;
}
/*
* Return parameters
*/
switch (mdev) {
case SOUND_MIXER_RECSRC:
val = 0;
break;
case SOUND_MIXER_DEVMASK:
val = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
break;
case SOUND_MIXER_STEREODEVS:
val = SOUND_MASK_VOLUME | SOUND_MASK_PCM | SOUND_MASK_SYNTH;
break;
case SOUND_MIXER_RECMASK:
val = 0;
break;
case SOUND_MIXER_CAPS:
val = 0;
break;
default:
if (mdev < SOUND_MIXER_NRDEVICES)
val = vidc_level_l[mdev] | vidc_level_r[mdev] << 8;
else
return -EINVAL;
}
return put_user(val, (unsigned int __user *)arg) ? -EFAULT : 0;
}
static unsigned int vidc_audio_set_format(int dev, unsigned int fmt)
{
switch (fmt) {
default:
fmt = AFMT_S16_LE;
case AFMT_U8:
case AFMT_S8:
case AFMT_S16_LE:
vidc_audio_format = fmt;
vidc_update_filler(vidc_audio_format, vidc_audio_channels);
case AFMT_QUERY:
break;
}
return vidc_audio_format;
}
#define my_abs(i) ((i)<0 ? -(i) : (i))
static int vidc_audio_set_speed(int dev, int rate)
{
if (rate) {
unsigned int hwctrl, hwrate, hwrate_ext, rate_int, rate_ext;
unsigned int diff_int, diff_ext;
unsigned int newsize, new2size;
hwctrl = 0x00000003;
/* Using internal clock */
hwrate = (((VIDC_SOUND_CLOCK * 2) / rate) + 1) >> 1;
if (hwrate < 3)
hwrate = 3;
if (hwrate > 255)
hwrate = 255;
/* Using exernal clock */
hwrate_ext = (((VIDC_SOUND_CLOCK_EXT * 2) / rate) + 1) >> 1;
if (hwrate_ext < 3)
hwrate_ext = 3;
if (hwrate_ext > 255)
hwrate_ext = 255;
rate_int = VIDC_SOUND_CLOCK / hwrate;
rate_ext = VIDC_SOUND_CLOCK_EXT / hwrate_ext;
/* Chose between external and internal clock */
diff_int = my_abs(rate_ext-rate);
diff_ext = my_abs(rate_int-rate);
if (diff_ext < diff_int) {
/*printk("VIDC: external %d %d %d\n", rate, rate_ext, hwrate_ext);*/
hwrate=hwrate_ext;
hwctrl=0x00000002;
/* Allow roughly 0.4% tolerance */
if (diff_ext > (rate/256))
rate=rate_ext;
} else {
/*printk("VIDC: internal %d %d %d\n", rate, rate_int, hwrate);*/
hwctrl=0x00000003;
/* Allow roughly 0.4% tolerance */
if (diff_int > (rate/256))
rate=rate_int;
}
vidc_writel(0xb0000000 | (hwrate - 2));
vidc_writel(0xb1000000 | hwctrl);
newsize = (10000 / hwrate) & ~3;
if (newsize < 208)
newsize = 208;
if (newsize > 4096)
newsize = 4096;
for (new2size = 128; new2size < newsize; new2size <<= 1);
if (new2size - newsize > newsize - (new2size >> 1))
new2size >>= 1;
if (new2size > 4096) {
printk(KERN_ERR "VIDC: error: dma buffer (%d) %d > 4K\n",
newsize, new2size);
new2size = 4096;
}
/*printk("VIDC: dma size %d\n", new2size);*/
dma_bufsize = new2size;
vidc_audio_rate = rate;
}
return vidc_audio_rate;
}
static short vidc_audio_set_channels(int dev, short channels)
{
switch (channels) {
default:
channels = 2;
case 1:
case 2:
vidc_audio_channels = channels;
vidc_update_filler(vidc_audio_format, vidc_audio_channels);
case 0:
break;
}
return vidc_audio_channels;
}
/*
* Open the device
*/
static int vidc_audio_open(int dev, int mode)
{
/* This audio device does not have recording capability */
if (mode == OPEN_READ)
return -EPERM;
if (vidc_busy)
return -EBUSY;
vidc_busy = 1;
return 0;
}
/*
* Close the device
*/
static void vidc_audio_close(int dev)
{
vidc_busy = 0;
}
/*
* Output a block via DMA to sound device.
*
* We just set the DMA start and count; the DMA interrupt routine
* will take care of formatting the samples (via the appropriate
* vidc_filler routine), and flag via vidc_audio_dma_interrupt when
* more data is required.
*/
static void
vidc_audio_output_block(int dev, unsigned long buf, int total_count, int one)
{
struct dma_buffparms *dmap = audio_devs[dev]->dmap_out;
unsigned long flags;
local_irq_save(flags);
dma_start = buf - (unsigned long)dmap->raw_buf_phys + (unsigned long)dmap->raw_buf;
dma_count = total_count;
local_irq_restore(flags);
}
static void
vidc_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
{
}
static int vidc_audio_prepare_for_input(int dev, int bsize, int bcount)
{
return -EINVAL;
}
static irqreturn_t vidc_audio_dma_interrupt(void)
{
DMAbuf_outputintr(vidc_adev, 1);
return IRQ_HANDLED;
}
/*
* Prepare for outputting samples.
*
* Each buffer that will be passed will be `bsize' bytes long,
* with a total of `bcount' buffers.
*/
static int vidc_audio_prepare_for_output(int dev, int bsize, int bcount)
{
struct audio_operations *adev = audio_devs[dev];
dma_interrupt = NULL;
adev->dmap_out->flags |= DMA_NODMA;
return 0;
}
/*
* Stop our current operation.
*/
static void vidc_audio_reset(int dev)
{
dma_interrupt = NULL;
}
static int vidc_audio_local_qlen(int dev)
{
return /*dma_count !=*/ 0;
}
static void vidc_audio_trigger(int dev, int enable_bits)
{
struct audio_operations *adev = audio_devs[dev];
if (enable_bits & PCM_ENABLE_OUTPUT) {
if (!(adev->dmap_out->flags & DMA_ACTIVE)) {
unsigned long flags;
local_irq_save(flags);
/* prevent recusion */
adev->dmap_out->flags |= DMA_ACTIVE;
dma_interrupt = vidc_audio_dma_interrupt;
vidc_sound_dma_irq(0, NULL);
iomd_writeb(DMA_CR_E | 0x10, IOMD_SD0CR);
local_irq_restore(flags);
}
}
}
static struct audio_driver vidc_audio_driver =
{
.owner = THIS_MODULE,
.open = vidc_audio_open,
.close = vidc_audio_close,
.output_block = vidc_audio_output_block,
.start_input = vidc_audio_start_input,
.prepare_for_input = vidc_audio_prepare_for_input,
.prepare_for_output = vidc_audio_prepare_for_output,
.halt_io = vidc_audio_reset,
.local_qlen = vidc_audio_local_qlen,
.trigger = vidc_audio_trigger,
.set_speed = vidc_audio_set_speed,
.set_bits = vidc_audio_set_format,
.set_channels = vidc_audio_set_channels
};
static struct mixer_operations vidc_mixer_operations = {
.owner = THIS_MODULE,
.id = "VIDC",
.name = "VIDCsound",
.ioctl = vidc_mixer_ioctl
};
void vidc_update_filler(int format, int channels)
{
#define TYPE(fmt,ch) (((fmt)<<2) | ((ch)&3))
switch (TYPE(format, channels)) {
default:
case TYPE(AFMT_U8, 1):
vidc_filler = vidc_fill_1x8_u;
break;
case TYPE(AFMT_U8, 2):
vidc_filler = vidc_fill_2x8_u;
break;
case TYPE(AFMT_S8, 1):
vidc_filler = vidc_fill_1x8_s;
break;
case TYPE(AFMT_S8, 2):
vidc_filler = vidc_fill_2x8_s;
break;
case TYPE(AFMT_S16_LE, 1):
vidc_filler = vidc_fill_1x16_s;
break;
case TYPE(AFMT_S16_LE, 2):
vidc_filler = vidc_fill_2x16_s;
break;
}
}
static void __init attach_vidc(struct address_info *hw_config)
{
char name[32];
int i, adev;
sprintf(name, "VIDC %d-bit sound", hw_config->card_subtype);
conf_printf(name, hw_config);
memset(dma_buf, 0, sizeof(dma_buf));
adev = sound_install_audiodrv(AUDIO_DRIVER_VERSION, name,
&vidc_audio_driver, sizeof(vidc_audio_driver),
DMA_AUTOMODE, AFMT_U8 | AFMT_S8 | AFMT_S16_LE,
NULL, hw_config->dma, hw_config->dma2);
if (adev < 0)
goto audio_failed;
/*
* 1024 bytes => 64 buffers
*/
audio_devs[adev]->min_fragment = 10;
audio_devs[adev]->mixer_dev = num_mixers;
audio_devs[adev]->mixer_dev =
sound_install_mixer(MIXER_DRIVER_VERSION,
name, &vidc_mixer_operations,
sizeof(vidc_mixer_operations), NULL);
if (audio_devs[adev]->mixer_dev < 0)
goto mixer_failed;
for (i = 0; i < 2; i++) {
dma_buf[i] = get_zeroed_page(GFP_KERNEL);
if (!dma_buf[i]) {
printk(KERN_ERR "%s: can't allocate required buffers\n",
name);
goto mem_failed;
}
dma_pbuf[i] = virt_to_phys((void *)dma_buf[i]);
}
if (sound_alloc_dma(hw_config->dma, hw_config->name)) {
printk(KERN_ERR "%s: DMA %d is in use\n", name, hw_config->dma);
goto dma_failed;
}
if (request_irq(hw_config->irq, vidc_sound_dma_irq, 0,
hw_config->name, &dma_start)) {
printk(KERN_ERR "%s: IRQ %d is in use\n", name, hw_config->irq);
goto irq_failed;
}
vidc_adev = adev;
vidc_mixer_set(SOUND_MIXER_VOLUME, (85 | 85 << 8));
return;
irq_failed:
sound_free_dma(hw_config->dma);
dma_failed:
mem_failed:
for (i = 0; i < 2; i++)
free_page(dma_buf[i]);
sound_unload_mixerdev(audio_devs[adev]->mixer_dev);
mixer_failed:
sound_unload_audiodev(adev);
audio_failed:
return;
}
static int __init probe_vidc(struct address_info *hw_config)
{
hw_config->irq = IRQ_DMAS0;
hw_config->dma = DMA_VIRTUAL_SOUND;
hw_config->dma2 = -1;
hw_config->card_subtype = 16;
hw_config->name = "VIDC20";
return 1;
}
static void __exit unload_vidc(struct address_info *hw_config)
{
int i, adev = vidc_adev;
vidc_adev = -1;
free_irq(hw_config->irq, &dma_start);
sound_free_dma(hw_config->dma);
if (adev >= 0) {
sound_unload_mixerdev(audio_devs[adev]->mixer_dev);
sound_unload_audiodev(adev);
for (i = 0; i < 2; i++)
free_page(dma_buf[i]);
}
}
static struct address_info cfg;
static int __init init_vidc(void)
{
if (probe_vidc(&cfg) == 0)
return -ENODEV;
attach_vidc(&cfg);
return 0;
}
static void __exit cleanup_vidc(void)
{
unload_vidc(&cfg);
}
module_init(init_vidc);
module_exit(cleanup_vidc);
MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("VIDC20 audio driver");
MODULE_LICENSE("GPL");
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