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![Ben Hutchings](/assets/img/avatar_default.png)
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
689 lines
18 KiB
C
689 lines
18 KiB
C
/*
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* This code is licenced under
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* the General Public Licence
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* version 2
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*
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* Copyright Adrian McMenamin 2005, 2006, 2007
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* <adrian@mcmen.demon.co.uk>
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* Requires firmware (BSD licenced) available from:
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* http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/
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* or the maintainer
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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 version 2 of the GNU General Public License as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/init.h>
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#include <linux/jiffies.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/wait.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/firmware.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/info.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <mach/sysasic.h>
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#include "aica.h"
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MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
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MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{Yamaha/SEGA, AICA}}");
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MODULE_FIRMWARE("aica_firmware.bin");
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/* module parameters */
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#define CARD_NAME "AICA"
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static int index = -1;
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static char *id;
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static int enable = 1;
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
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module_param(id, charp, 0444);
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MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
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module_param(enable, bool, 0644);
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MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
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/* Use workqueue */
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static struct workqueue_struct *aica_queue;
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/* Simple platform device */
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static struct platform_device *pd;
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static struct resource aica_memory_space[2] = {
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{
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.name = "AICA ARM CONTROL",
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.start = ARM_RESET_REGISTER,
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.flags = IORESOURCE_MEM,
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.end = ARM_RESET_REGISTER + 3,
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},
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{
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.name = "AICA Sound RAM",
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.start = SPU_MEMORY_BASE,
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.flags = IORESOURCE_MEM,
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.end = SPU_MEMORY_BASE + 0x200000 - 1,
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},
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};
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/* SPU specific functions */
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/* spu_write_wait - wait for G2-SH FIFO to clear */
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static void spu_write_wait(void)
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{
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int time_count;
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time_count = 0;
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while (1) {
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if (!(readl(G2_FIFO) & 0x11))
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break;
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/* To ensure hardware failure doesn't wedge kernel */
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time_count++;
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if (time_count > 0x10000) {
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snd_printk
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("WARNING: G2 FIFO appears to be blocked.\n");
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break;
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}
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}
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}
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/* spu_memset - write to memory in SPU address space */
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static void spu_memset(u32 toi, u32 what, int length)
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{
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int i;
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unsigned long flags;
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if (snd_BUG_ON(length % 4))
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return;
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for (i = 0; i < length; i++) {
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if (!(i % 8))
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spu_write_wait();
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local_irq_save(flags);
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writel(what, toi + SPU_MEMORY_BASE);
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local_irq_restore(flags);
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toi++;
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}
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}
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/* spu_memload - write to SPU address space */
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static void spu_memload(u32 toi, void *from, int length)
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{
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unsigned long flags;
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u32 *froml = from;
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u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
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int i;
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u32 val;
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length = DIV_ROUND_UP(length, 4);
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spu_write_wait();
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for (i = 0; i < length; i++) {
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if (!(i % 8))
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spu_write_wait();
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val = *froml;
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local_irq_save(flags);
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writel(val, to);
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local_irq_restore(flags);
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froml++;
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to++;
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}
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}
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/* spu_disable - set spu registers to stop sound output */
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static void spu_disable(void)
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{
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int i;
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unsigned long flags;
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u32 regval;
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spu_write_wait();
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regval = readl(ARM_RESET_REGISTER);
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regval |= 1;
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spu_write_wait();
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local_irq_save(flags);
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writel(regval, ARM_RESET_REGISTER);
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local_irq_restore(flags);
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for (i = 0; i < 64; i++) {
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spu_write_wait();
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regval = readl(SPU_REGISTER_BASE + (i * 0x80));
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regval = (regval & ~0x4000) | 0x8000;
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spu_write_wait();
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local_irq_save(flags);
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writel(regval, SPU_REGISTER_BASE + (i * 0x80));
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local_irq_restore(flags);
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}
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}
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/* spu_enable - set spu registers to enable sound output */
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static void spu_enable(void)
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{
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unsigned long flags;
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u32 regval = readl(ARM_RESET_REGISTER);
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regval &= ~1;
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spu_write_wait();
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local_irq_save(flags);
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writel(regval, ARM_RESET_REGISTER);
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local_irq_restore(flags);
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}
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/*
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* Halt the sound processor, clear the memory,
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* load some default ARM7 code, and then restart ARM7
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*/
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static void spu_reset(void)
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{
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unsigned long flags;
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spu_disable();
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spu_memset(0, 0, 0x200000 / 4);
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/* Put ARM7 in endless loop */
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local_irq_save(flags);
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ctrl_outl(0xea000002, SPU_MEMORY_BASE);
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local_irq_restore(flags);
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spu_enable();
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}
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/* aica_chn_start - write to spu to start playback */
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static void aica_chn_start(void)
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{
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unsigned long flags;
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spu_write_wait();
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local_irq_save(flags);
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writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
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local_irq_restore(flags);
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}
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/* aica_chn_halt - write to spu to halt playback */
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static void aica_chn_halt(void)
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{
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unsigned long flags;
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spu_write_wait();
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local_irq_save(flags);
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writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
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local_irq_restore(flags);
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}
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/* ALSA code below */
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static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
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.info = (SNDRV_PCM_INFO_NONINTERLEAVED),
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.formats =
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(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_IMA_ADPCM),
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.rates = SNDRV_PCM_RATE_8000_48000,
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.rate_min = 8000,
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.rate_max = 48000,
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.channels_min = 1,
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.channels_max = 2,
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.buffer_bytes_max = AICA_BUFFER_SIZE,
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.period_bytes_min = AICA_PERIOD_SIZE,
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.period_bytes_max = AICA_PERIOD_SIZE,
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.periods_min = AICA_PERIOD_NUMBER,
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.periods_max = AICA_PERIOD_NUMBER,
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};
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static int aica_dma_transfer(int channels, int buffer_size,
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struct snd_pcm_substream *substream)
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{
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int q, err, period_offset;
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struct snd_card_aica *dreamcastcard;
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struct snd_pcm_runtime *runtime;
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unsigned long flags;
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err = 0;
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dreamcastcard = substream->pcm->private_data;
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period_offset = dreamcastcard->clicks;
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period_offset %= (AICA_PERIOD_NUMBER / channels);
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runtime = substream->runtime;
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for (q = 0; q < channels; q++) {
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local_irq_save(flags);
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err = dma_xfer(AICA_DMA_CHANNEL,
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(unsigned long) (runtime->dma_area +
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(AICA_BUFFER_SIZE * q) /
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channels +
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AICA_PERIOD_SIZE *
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period_offset),
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AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
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AICA_PERIOD_SIZE * period_offset,
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buffer_size / channels, AICA_DMA_MODE);
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if (unlikely(err < 0)) {
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local_irq_restore(flags);
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break;
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}
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dma_wait_for_completion(AICA_DMA_CHANNEL);
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local_irq_restore(flags);
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}
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return err;
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}
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static void startup_aica(struct snd_card_aica *dreamcastcard)
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{
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spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
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dreamcastcard->channel, sizeof(struct aica_channel));
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aica_chn_start();
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}
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static void run_spu_dma(struct work_struct *work)
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{
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int buffer_size;
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struct snd_pcm_runtime *runtime;
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struct snd_card_aica *dreamcastcard;
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dreamcastcard =
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container_of(work, struct snd_card_aica, spu_dma_work);
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runtime = dreamcastcard->substream->runtime;
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if (unlikely(dreamcastcard->dma_check == 0)) {
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buffer_size =
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frames_to_bytes(runtime, runtime->buffer_size);
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if (runtime->channels > 1)
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dreamcastcard->channel->flags |= 0x01;
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aica_dma_transfer(runtime->channels, buffer_size,
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dreamcastcard->substream);
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startup_aica(dreamcastcard);
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dreamcastcard->clicks =
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buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
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return;
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} else {
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aica_dma_transfer(runtime->channels,
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AICA_PERIOD_SIZE * runtime->channels,
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dreamcastcard->substream);
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snd_pcm_period_elapsed(dreamcastcard->substream);
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dreamcastcard->clicks++;
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if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
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dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
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mod_timer(&dreamcastcard->timer, jiffies + 1);
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}
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}
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static void aica_period_elapsed(unsigned long timer_var)
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{
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/*timer function - so cannot sleep */
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int play_period;
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struct snd_pcm_runtime *runtime;
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struct snd_pcm_substream *substream;
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struct snd_card_aica *dreamcastcard;
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substream = (struct snd_pcm_substream *) timer_var;
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runtime = substream->runtime;
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dreamcastcard = substream->pcm->private_data;
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/* Have we played out an additional period? */
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play_period =
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frames_to_bytes(runtime,
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readl
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(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
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AICA_PERIOD_SIZE;
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if (play_period == dreamcastcard->current_period) {
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/* reschedule the timer */
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mod_timer(&(dreamcastcard->timer), jiffies + 1);
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return;
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}
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if (runtime->channels > 1)
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dreamcastcard->current_period = play_period;
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if (unlikely(dreamcastcard->dma_check == 0))
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dreamcastcard->dma_check = 1;
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queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
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}
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static void spu_begin_dma(struct snd_pcm_substream *substream)
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{
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struct snd_card_aica *dreamcastcard;
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struct snd_pcm_runtime *runtime;
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runtime = substream->runtime;
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dreamcastcard = substream->pcm->private_data;
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/*get the queue to do the work */
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queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
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/* Timer may already be running */
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if (unlikely(dreamcastcard->timer.data)) {
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mod_timer(&dreamcastcard->timer, jiffies + 4);
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return;
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}
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init_timer(&(dreamcastcard->timer));
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dreamcastcard->timer.data = (unsigned long) substream;
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dreamcastcard->timer.function = aica_period_elapsed;
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dreamcastcard->timer.expires = jiffies + 4;
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add_timer(&(dreamcastcard->timer));
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}
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static int snd_aicapcm_pcm_open(struct snd_pcm_substream
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*substream)
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{
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struct snd_pcm_runtime *runtime;
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struct aica_channel *channel;
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struct snd_card_aica *dreamcastcard;
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if (!enable)
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return -ENOENT;
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dreamcastcard = substream->pcm->private_data;
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channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
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if (!channel)
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return -ENOMEM;
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/* set defaults for channel */
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channel->sfmt = SM_8BIT;
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channel->cmd = AICA_CMD_START;
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channel->vol = dreamcastcard->master_volume;
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channel->pan = 0x80;
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channel->pos = 0;
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channel->flags = 0; /* default to mono */
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dreamcastcard->channel = channel;
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runtime = substream->runtime;
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runtime->hw = snd_pcm_aica_playback_hw;
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spu_enable();
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dreamcastcard->clicks = 0;
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dreamcastcard->current_period = 0;
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dreamcastcard->dma_check = 0;
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return 0;
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}
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static int snd_aicapcm_pcm_close(struct snd_pcm_substream
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*substream)
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{
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struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
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flush_workqueue(aica_queue);
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if (dreamcastcard->timer.data)
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del_timer(&dreamcastcard->timer);
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kfree(dreamcastcard->channel);
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spu_disable();
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return 0;
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}
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static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream
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*substream)
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{
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/* Free the DMA buffer */
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return snd_pcm_lib_free_pages(substream);
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}
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static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
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*substream, struct snd_pcm_hw_params
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*hw_params)
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{
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/* Allocate a DMA buffer using ALSA built-ins */
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return
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snd_pcm_lib_malloc_pages(substream,
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params_buffer_bytes(hw_params));
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}
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static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
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*substream)
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{
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struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
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if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
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dreamcastcard->channel->sfmt = SM_16BIT;
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dreamcastcard->channel->freq = substream->runtime->rate;
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dreamcastcard->substream = substream;
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return 0;
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}
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static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
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*substream, int cmd)
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{
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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spu_begin_dma(substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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aica_chn_halt();
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
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*substream)
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{
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return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
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}
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static struct snd_pcm_ops snd_aicapcm_playback_ops = {
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.open = snd_aicapcm_pcm_open,
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.close = snd_aicapcm_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_aicapcm_pcm_hw_params,
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.hw_free = snd_aicapcm_pcm_hw_free,
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.prepare = snd_aicapcm_pcm_prepare,
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.trigger = snd_aicapcm_pcm_trigger,
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.pointer = snd_aicapcm_pcm_pointer,
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};
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/* TO DO: set up to handle more than one pcm instance */
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static int __init snd_aicapcmchip(struct snd_card_aica
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*dreamcastcard, int pcm_index)
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{
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struct snd_pcm *pcm;
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int err;
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/* AICA has no capture ability */
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err =
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snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
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&pcm);
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if (unlikely(err < 0))
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return err;
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pcm->private_data = dreamcastcard;
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strcpy(pcm->name, "AICA PCM");
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
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&snd_aicapcm_playback_ops);
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/* Allocate the DMA buffers */
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err =
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snd_pcm_lib_preallocate_pages_for_all(pcm,
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SNDRV_DMA_TYPE_CONTINUOUS,
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snd_dma_continuous_data
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(GFP_KERNEL),
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AICA_BUFFER_SIZE,
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AICA_BUFFER_SIZE);
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return err;
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}
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/* Mixer controls */
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#define aica_pcmswitch_info snd_ctl_boolean_mono_info
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static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */
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return 0;
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}
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|
|
static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
if (ucontrol->value.integer.value[0] == 1)
|
|
return 0; /* TO DO: Fix me */
|
|
else
|
|
aica_chn_halt();
|
|
return 0;
|
|
}
|
|
|
|
static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
|
uinfo->count = 1;
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 0xFF;
|
|
return 0;
|
|
}
|
|
|
|
static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_card_aica *dreamcastcard;
|
|
dreamcastcard = kcontrol->private_data;
|
|
if (unlikely(!dreamcastcard->channel))
|
|
return -ETXTBSY; /* we've not yet been set up */
|
|
ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
|
|
return 0;
|
|
}
|
|
|
|
static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_card_aica *dreamcastcard;
|
|
unsigned int vol;
|
|
dreamcastcard = kcontrol->private_data;
|
|
if (unlikely(!dreamcastcard->channel))
|
|
return -ETXTBSY;
|
|
vol = ucontrol->value.integer.value[0];
|
|
if (vol > 0xff)
|
|
return -EINVAL;
|
|
if (unlikely(dreamcastcard->channel->vol == vol))
|
|
return 0;
|
|
dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
|
|
dreamcastcard->master_volume = ucontrol->value.integer.value[0];
|
|
spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
|
|
dreamcastcard->channel, sizeof(struct aica_channel));
|
|
return 1;
|
|
}
|
|
|
|
static struct snd_kcontrol_new snd_aica_pcmswitch_control __devinitdata = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "PCM Playback Switch",
|
|
.index = 0,
|
|
.info = aica_pcmswitch_info,
|
|
.get = aica_pcmswitch_get,
|
|
.put = aica_pcmswitch_put
|
|
};
|
|
|
|
static struct snd_kcontrol_new snd_aica_pcmvolume_control __devinitdata = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "PCM Playback Volume",
|
|
.index = 0,
|
|
.info = aica_pcmvolume_info,
|
|
.get = aica_pcmvolume_get,
|
|
.put = aica_pcmvolume_put
|
|
};
|
|
|
|
static int load_aica_firmware(void)
|
|
{
|
|
int err;
|
|
const struct firmware *fw_entry;
|
|
spu_reset();
|
|
err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
|
|
if (unlikely(err))
|
|
return err;
|
|
/* write firmware into memory */
|
|
spu_disable();
|
|
spu_memload(0, fw_entry->data, fw_entry->size);
|
|
spu_enable();
|
|
release_firmware(fw_entry);
|
|
return err;
|
|
}
|
|
|
|
static int __devinit add_aicamixer_controls(struct snd_card_aica
|
|
*dreamcastcard)
|
|
{
|
|
int err;
|
|
err = snd_ctl_add
|
|
(dreamcastcard->card,
|
|
snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
|
|
if (unlikely(err < 0))
|
|
return err;
|
|
err = snd_ctl_add
|
|
(dreamcastcard->card,
|
|
snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
|
|
if (unlikely(err < 0))
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit snd_aica_remove(struct platform_device *devptr)
|
|
{
|
|
struct snd_card_aica *dreamcastcard;
|
|
dreamcastcard = platform_get_drvdata(devptr);
|
|
if (unlikely(!dreamcastcard))
|
|
return -ENODEV;
|
|
snd_card_free(dreamcastcard->card);
|
|
kfree(dreamcastcard);
|
|
platform_set_drvdata(devptr, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit snd_aica_probe(struct platform_device *devptr)
|
|
{
|
|
int err;
|
|
struct snd_card_aica *dreamcastcard;
|
|
dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
|
|
if (unlikely(!dreamcastcard))
|
|
return -ENOMEM;
|
|
err = snd_card_create(index, SND_AICA_DRIVER, THIS_MODULE, 0,
|
|
&dreamcastcard->card);
|
|
if (unlikely(err < 0)) {
|
|
kfree(dreamcastcard);
|
|
return err;
|
|
}
|
|
strcpy(dreamcastcard->card->driver, "snd_aica");
|
|
strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
|
|
strcpy(dreamcastcard->card->longname,
|
|
"Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
|
|
/* Prepare to use the queue */
|
|
INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
|
|
/* Load the PCM 'chip' */
|
|
err = snd_aicapcmchip(dreamcastcard, 0);
|
|
if (unlikely(err < 0))
|
|
goto freedreamcast;
|
|
snd_card_set_dev(dreamcastcard->card, &devptr->dev);
|
|
dreamcastcard->timer.data = 0;
|
|
dreamcastcard->channel = NULL;
|
|
/* Add basic controls */
|
|
err = add_aicamixer_controls(dreamcastcard);
|
|
if (unlikely(err < 0))
|
|
goto freedreamcast;
|
|
/* Register the card with ALSA subsystem */
|
|
err = snd_card_register(dreamcastcard->card);
|
|
if (unlikely(err < 0))
|
|
goto freedreamcast;
|
|
platform_set_drvdata(devptr, dreamcastcard);
|
|
aica_queue = create_workqueue(CARD_NAME);
|
|
if (unlikely(!aica_queue))
|
|
goto freedreamcast;
|
|
snd_printk
|
|
("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
|
|
return 0;
|
|
freedreamcast:
|
|
snd_card_free(dreamcastcard->card);
|
|
kfree(dreamcastcard);
|
|
return err;
|
|
}
|
|
|
|
static struct platform_driver snd_aica_driver = {
|
|
.probe = snd_aica_probe,
|
|
.remove = __devexit_p(snd_aica_remove),
|
|
.driver = {
|
|
.name = SND_AICA_DRIVER},
|
|
};
|
|
|
|
static int __init aica_init(void)
|
|
{
|
|
int err;
|
|
err = platform_driver_register(&snd_aica_driver);
|
|
if (unlikely(err < 0))
|
|
return err;
|
|
pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
|
|
aica_memory_space, 2);
|
|
if (IS_ERR(pd)) {
|
|
platform_driver_unregister(&snd_aica_driver);
|
|
return PTR_ERR(pd);
|
|
}
|
|
/* Load the firmware */
|
|
return load_aica_firmware();
|
|
}
|
|
|
|
static void __exit aica_exit(void)
|
|
{
|
|
/* Destroy the aica kernel thread *
|
|
* being extra cautious to check if it exists*/
|
|
if (likely(aica_queue))
|
|
destroy_workqueue(aica_queue);
|
|
platform_device_unregister(pd);
|
|
platform_driver_unregister(&snd_aica_driver);
|
|
/* Kill any sound still playing and reset ARM7 to safe state */
|
|
spu_reset();
|
|
}
|
|
|
|
module_init(aica_init);
|
|
module_exit(aica_exit);
|