diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-08-01 13:48:40 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-08-01 13:48:40 +0000 |
commit | dce1032b6cdc2cd3c4e6b0ca3695aca6558c56c3 (patch) | |
tree | e485d78b238db7255395470e037305af8b8a642c /c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c | |
parent | 2011-08-01 Jennifer Averett <Jennifer.Averett@OARcorp.com> (diff) | |
download | rtems-dce1032b6cdc2cd3c4e6b0ca3695aca6558c56c3.tar.bz2 |
2011-08-01 Sebastien Bourdeauducq <sebastien.bourdeauducq@gmail.com>
PR 1869/bsps
* startup/bspclean.c: New file.
* include/tm27.h: Removed.
* ChangeLog, Makefile.am, README, preinstall.am, include/bsp.h,
include/system_conf.h, make/custom/milkymist.cfg, startup/linkcmds:
Complete BSP for Milkymist One supporting Milkymist SOC 1.0.x.
Includes new or updated drivers for:
- Multi-standard video input (PAL/SECAM/NTSC)
- Two DMX512 (RS485) ports
- MIDI IN and MIDI OUT ports
- VGA output
- AC'97 audio
- NOR flash
- 10/100 Ethernet
- Memory card (experimental and incomplete)
- USB host connectors (input devices only)
- RC5 infrared receiver
- RS232 debug port
Diffstat (limited to 'c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c')
-rw-r--r-- | c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c | 443 |
1 files changed, 375 insertions, 68 deletions
diff --git a/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c b/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c index 671d4f165b..b467538122 100644 --- a/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c +++ b/c/src/lib/libbsp/lm32/shared/milkymist_ac97/ac97.c @@ -1,7 +1,6 @@ /* ac97.c * - * This file is the sound driver for the Milkymist One board - * It does an OSS style character device in /dev/snd + * Sound driver for Milkymist SoC * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at @@ -9,111 +8,419 @@ * * $Id$ * - * COPYRIGHT (c) Yann Sionneau <yann.sionneau@telecom-sudparis.eu> (GSoC 2010) - * Telecom SudParis + * COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq */ -#include <stdlib.h> -#include <stdio.h> -#include <errno.h> -#include <sys/types.h> -#include <pthread.h> +#define RTEMS_STATUS_CHECKS_USE_PRINTK + #include <rtems.h> #include <bsp.h> -#include "../include/system_conf.h" +#include <bsp/irq-generic.h> #include <rtems/libio.h> +#include <rtems/status-checks.h> +#include "../include/system_conf.h" +#include "milkymist_ac97.h" -#define GPIO_DRIVER_TABLE_ENTRY { ac97_initialize, \ -ac97_open, ac97_close, ac97_read, ac97_write, ac97_control} +#define SND_DEVICE_NAME "/dev/snd" +#define MIXER_DEVICE_NAME "/dev/mixer" -#define SND_DEVICE_NAME "/dev/snd" +static rtems_id cr_write_sem; +static rtems_id cr_read_sem; -static struct milkymist_ac97 { - rtems_device_minor_number minor; - pthread_mutex_t mutex; -} ac97_driver; +static rtems_isr crrequest_handler(rtems_vector_number n) +{ + rtems_semaphore_release(cr_write_sem); + lm32_interrupt_ack(1 << MM_IRQ_AC97CRREQUEST); +} -rtems_device_driver gpio_initialize( -rtems_device_major_number major, -rtems_device_minor_number minor, -void *arg) +static rtems_isr crreply_handler(rtems_vector_number n) { - rtems_status_code status; + rtems_semaphore_release(cr_read_sem); + lm32_interrupt_ack(1 << MM_IRQ_AC97CRREPLY); +} - printk( "ac97 driver initializing..\n" ); +/* queued playback buffers */ +#define PLAY_Q_SIZE 8 +#define PLAY_Q_MASK (PLAY_Q_SIZE-1) - status = rtems_io_register_name(SND_DEVICE_NAME, major, 0); - if (status != RTEMS_SUCCESSFUL) - { - printk("Error registering /dev/snd ac97 device \n"); - rtems_fatal_error_occurred( status ); - } - gpio[0].minor = 0; - gpio[0].mutex = PTHREAD_MUTEX_INITIALIZER; +static struct snd_buffer *play_q[PLAY_Q_SIZE]; +static int play_produce; +static int play_consume; +static int play_level; - return RTEMS_SUCCESSFUL; +/* buffers played, for application to collect */ +static rtems_id play_q_done; + +static void play_start(struct snd_buffer *buf) +{ + if (buf->nsamples > (AC97_MAX_DMASIZE/4)) + buf->nsamples = AC97_MAX_DMASIZE/4; + + MM_WRITE(MM_AC97_DADDRESS, (unsigned int)buf->samples); + MM_WRITE(MM_AC97_DREMAINING, buf->nsamples*4); + MM_WRITE(MM_AC97_DCTL, AC97_SCTL_EN); +} + +static rtems_isr pcmplay_handler(rtems_vector_number n) +{ + lm32_interrupt_ack(1 << MM_IRQ_AC97DMAR); + + rtems_message_queue_send(play_q_done, &play_q[play_consume], + sizeof(void *)); + + play_consume = (play_consume + 1) & PLAY_Q_MASK; + play_level--; + + if(play_level > 0) + play_start(play_q[play_consume]); + else + MM_WRITE(MM_AC97_DCTL, 0); +} + +/* queued record buffers */ +#define RECORD_Q_SIZE 8 +#define RECORD_Q_MASK (RECORD_Q_SIZE-1) + +static struct snd_buffer *record_q[RECORD_Q_SIZE]; +static int record_produce; +static int record_consume; +static int record_level; + +/* buffers recorded, for application to collect */ +static rtems_id record_q_done; + +static void record_start(struct snd_buffer *buf) +{ + if (buf->nsamples > (AC97_MAX_DMASIZE/4)) + buf->nsamples = AC97_MAX_DMASIZE/4; + + MM_WRITE(MM_AC97_UADDRESS, (unsigned int)buf->samples); + MM_WRITE(MM_AC97_UREMAINING, buf->nsamples*4); + MM_WRITE(MM_AC97_UCTL, AC97_SCTL_EN); +} + +static rtems_isr pcmrecord_handler(rtems_vector_number n) +{ + lm32_interrupt_ack(1 << MM_IRQ_AC97DMAW); + + __asm__ volatile( /* Invalidate Level-1 data cache */ + "wcsr DCC, r0\n" + "nop\n" + ); + + rtems_message_queue_send(record_q_done, &record_q[record_consume], + sizeof(void *)); + + record_consume = (record_consume + 1) & RECORD_Q_MASK; + record_level--; + + if(record_level > 0) + record_start(record_q[record_consume]); + else + MM_WRITE(MM_AC97_UCTL, 0); } -rtems_device_driver gpio_close( - rtems_device_major_number major, - rtems_device_minor_number minor, +rtems_device_driver ac97_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, void *arg ) { - if (pthread_mutex_unlock(&ac97_driver.mutex) == 0){ - return RTEMS_SUCCESSFUL; + rtems_status_code sc; + rtems_isr_entry dummy; + + sc = rtems_io_register_name(SND_DEVICE_NAME, major, 0); + RTEMS_CHECK_SC(sc, "create snd device"); + + sc = rtems_io_register_name(MIXER_DEVICE_NAME, major, 1); + RTEMS_CHECK_SC(sc, "create mixer device"); + + sc = rtems_semaphore_create( + rtems_build_name('C', 'R', 'W', 'S'), + 0, + RTEMS_SIMPLE_BINARY_SEMAPHORE, + 0, + &cr_write_sem + ); + RTEMS_CHECK_SC(sc, "create AC97 register write semaphore"); + + sc = rtems_semaphore_create( + rtems_build_name('C', 'R', 'R', 'S'), + 0, + RTEMS_SIMPLE_BINARY_SEMAPHORE, + 0, + &cr_read_sem + ); + RTEMS_CHECK_SC(sc, "create AC97 register read semaphore"); + + sc = rtems_message_queue_create( + rtems_build_name('P', 'L', 'Y', 'Q'), + PLAY_Q_SIZE*2, + sizeof(void *), + 0, + &play_q_done + ); + RTEMS_CHECK_SC(sc, "create playback done queue"); + + sc = rtems_message_queue_create( + rtems_build_name('R', 'E', 'C', 'Q'), + RECORD_Q_SIZE*2, + sizeof(void *), + 0, + &record_q_done + ); + RTEMS_CHECK_SC(sc, "create record done queue"); + + rtems_interrupt_catch(crrequest_handler, MM_IRQ_AC97CRREQUEST, &dummy); + rtems_interrupt_catch(crreply_handler, MM_IRQ_AC97CRREPLY, &dummy); + rtems_interrupt_catch(pcmplay_handler, MM_IRQ_AC97DMAR, &dummy); + rtems_interrupt_catch(pcmrecord_handler, MM_IRQ_AC97DMAW, &dummy); + bsp_interrupt_vector_enable(MM_IRQ_AC97CRREQUEST); + bsp_interrupt_vector_enable(MM_IRQ_AC97CRREPLY); + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAR); + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAW); + + play_produce = 0; + play_consume = 0; + play_level = 0; + + record_produce = 0; + record_consume = 0; + record_level = 0; + + return RTEMS_SUCCESSFUL; +} + +static rtems_status_code submit_play(struct snd_buffer *buf) +{ + bsp_interrupt_vector_disable(MM_IRQ_AC97DMAR); + if (play_level == PLAY_Q_SIZE) { + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAR); + return RTEMS_UNSATISFIED; } - return RTEMS_UNSATISFIED; + play_q[play_produce] = buf; + play_produce = (play_produce + 1) & PLAY_Q_MASK; + play_level++; + + if (play_level == 1) + play_start(buf); + + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAR); + return RTEMS_SUCCESSFUL; } -rtems_device_driver gpio_open( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) +static rtems_status_code collect_play(struct snd_buffer **buf) { - if (pthread_mutex_trylock(&ac97_driver.mutex) == 0){ - return RTEMS_SUCCESSFUL; + size_t s; + + return rtems_message_queue_receive( + play_q_done, + buf, + &s, + RTEMS_WAIT, + RTEMS_NO_TIMEOUT + ); +} + +static rtems_status_code submit_record(struct snd_buffer *buf) +{ + bsp_interrupt_vector_disable(MM_IRQ_AC97DMAW); + if (record_level == RECORD_Q_SIZE) { + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAW); + return RTEMS_UNSATISFIED; } - return RTEMS_UNSATISFIED; + record_q[record_produce] = buf; + record_produce = (record_produce + 1) & RECORD_Q_MASK; + record_level++; + + if (record_level == 1) + record_start(buf); + + bsp_interrupt_vector_enable(MM_IRQ_AC97DMAW); + return RTEMS_SUCCESSFUL; +} + +static rtems_status_code collect_record(struct snd_buffer **buf) +{ + size_t s; + + return rtems_message_queue_receive( + record_q_done, + buf, + &s, + RTEMS_WAIT, + RTEMS_NO_TIMEOUT + ); } +#define CR_TIMEOUT 10 + +static int read_cr(unsigned int adr) +{ + rtems_status_code sc; + + MM_WRITE(MM_AC97_CRADDR, adr); + MM_WRITE(MM_AC97_CRCTL, AC97_CRCTL_RQEN); + sc = rtems_semaphore_obtain(cr_write_sem, RTEMS_WAIT, CR_TIMEOUT); + if (sc != RTEMS_SUCCESSFUL) + return -1; + sc = rtems_semaphore_obtain(cr_read_sem, RTEMS_WAIT, CR_TIMEOUT); + if (sc != RTEMS_SUCCESSFUL) + return -1; + return MM_READ(MM_AC97_CRDATAIN); +} + +static int write_cr(unsigned int adr, unsigned int val) +{ + rtems_status_code sc; + + MM_WRITE(MM_AC97_CRADDR, adr); + MM_WRITE(MM_AC97_CRDATAOUT, val); + MM_WRITE(MM_AC97_CRCTL, AC97_CRCTL_RQEN|AC97_CRCTL_WRITE); + sc = rtems_semaphore_obtain(cr_write_sem, RTEMS_WAIT, CR_TIMEOUT); + if (sc != RTEMS_SUCCESSFUL) + return 0; + return 1; +} -rtems_device_driver gpio_read( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg +rtems_device_driver ac97_open( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg ) { - rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; + int codec_id; - return RTEMS_SUCCESSFUL; + if (minor == 0) { + /* snd */ + return RTEMS_SUCCESSFUL; + } else { + /* mixer */ + codec_id = read_cr(0x00); + if ((codec_id != 0x0d50) && (codec_id != 0x6150)) { + printk("AC97 codec detection failed\n"); + return RTEMS_UNSATISFIED; + } + write_cr(0x02, 0x0000); /* master volume */ + write_cr(0x04, 0x0f0f); /* headphones volume */ + write_cr(0x18, 0x0000); /* PCM out volume */ + write_cr(0x1c, 0x0f0f); /* record gain */ + + write_cr(0x1a, 0x0505); /* record select: stereo mix */ + + return RTEMS_SUCCESSFUL; + } } -rtems_device_driver gpio_write( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) +static rtems_status_code ioctl_read_channel(void *buf, + unsigned int chan, int mono) { - rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; + unsigned int *val = (unsigned int *)buf; + int codec; + int left, right; + codec = read_cr(chan); + if (codec < 0) + return RTEMS_UNSATISFIED; + if (codec & 0x8000) { + /* muted */ + *val = 0; + return RTEMS_SUCCESSFUL; + } + if (mono) { + right = left = 100-(((codec & 0x1f) + 1)*100)/32; + } else { + right = 100-(((codec & 0x1f) + 1)*100)/32; + left = 100-((((codec & 0x1f00) >> 8) + 1)*100)/32; + } + *val = left | (right << 8); return RTEMS_SUCCESSFUL; } -rtems_device_driver gpio_control( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg +static rtems_status_code ioctl_write_channel(void *buf, + unsigned int chan, int mono) +{ + unsigned int *val = (unsigned int *)buf; + int left, right; + int codec; + rtems_status_code sc; + + left = *val & 0xff; + left = (left*32)/100 - 1; + if(left < 0) + left = 0; + + if (mono) + right = 31; + else { + right = (*val >> 8) & 0xff; + right = (right*32)/100 - 1; + if(right < 0) + right = 0; + } + + if ((left == 0) && (right == 0)) + /* mute */ + codec = 0x8000; + else + codec = (31-left) | ((31-right) << 8); + + if (!write_cr(chan, codec)) + sc = RTEMS_UNSATISFIED; + else + sc = RTEMS_SUCCESSFUL; + return sc; +} + +rtems_device_driver ac97_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg ) { rtems_libio_ioctl_args_t *args = arg; + rtems_status_code sc; - switch( args->command ) { - default: - args->ioctl_return = 0; - break; + args->ioctl_return = -1; + if(minor == 0) { + /* dsp */ + switch (args->command) { + case SOUND_SND_SUBMIT_PLAY: + return submit_play((struct snd_buffer *)args->buffer); + case SOUND_SND_COLLECT_PLAY: + return collect_play((struct snd_buffer **)args->buffer); + case SOUND_SND_SUBMIT_RECORD: + return submit_record((struct snd_buffer *)args->buffer); + case SOUND_SND_COLLECT_RECORD: + return collect_record((struct snd_buffer **)args->buffer); + default: + return RTEMS_UNSATISFIED; + } + } else { + /* mixer */ + switch (args->command) { + case SOUND_MIXER_READ(SOUND_MIXER_MIC): + sc = ioctl_read_channel(args->buffer, 0x0e, 1); + if(sc == RTEMS_SUCCESSFUL) + args->ioctl_return = 0; + return sc; + case SOUND_MIXER_READ(SOUND_MIXER_LINE): + sc = ioctl_read_channel(args->buffer, 0x10, 0); + if(sc == RTEMS_SUCCESSFUL) + args->ioctl_return = 0; + return sc; + case SOUND_MIXER_WRITE(SOUND_MIXER_MIC): + sc = ioctl_write_channel(args->buffer, 0x0e, 1); + if(sc == RTEMS_SUCCESSFUL) + args->ioctl_return = 0; + return sc; + case SOUND_MIXER_WRITE(SOUND_MIXER_LINE): + sc = ioctl_write_channel(args->buffer, 0x10, 0); + if(sc == RTEMS_SUCCESSFUL) + args->ioctl_return = 0; + return sc; + default: + return RTEMS_UNSATISFIED; + } } - return RTEMS_SUCCESSFUL; } - |