sc6000.c

来自「linux 内核源代码」· C语言 代码 · 共 657 行 · 第 1/2 页

/*
 *  Driver for Gallant SC-6000 soundcard. This card is also known as
 *  Audio Excel DSP 16 or Zoltrix AV302.
 *  These cards use CompuMedia ASC-9308 chip + AD1848 codec.
 *
 *  Copyright (C) 2007 Krzysztof Helt <[e-mail]>
 *
 *  I don't have documentation for this card. I used the driver
 *  for OSS/Free included in the kernel source as reference.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <sound/driver.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/isa.h>
#include <linux/io.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/ad1848.h>
#include <sound/opl3.h>
#include <sound/mpu401.h>
#include <sound/control.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

MODULE_AUTHOR("Krzysztof Helt");
MODULE_DESCRIPTION("Gallant SC-6000");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Gallant, SC-6000},"
			"{AudioExcel, Audio Excel DSP 16},"
			"{Zoltrix, AV302}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x220, 0x240 */
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5, 7, 9, 10, 11 */
static long mss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x530, 0xe80 */
static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
						/* 0x300, 0x310, 0x320, 0x330 */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 5, 7, 9, 10, 0 */
static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0, 1, 3 */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for sc-6000 based soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for sc-6000 based soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable sc-6000 based soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for sc-6000 driver.");
module_param_array(mss_port, long, NULL, 0444);
MODULE_PARM_DESC(mss_port, "MSS Port # for sc-6000 driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for sc-6000 driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for sc-6000 driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for sc-6000 driver.");
module_param_array(dma, int, NULL, 0444);
MODULE_PARM_DESC(dma, "DMA # for sc-6000 driver.");

/*
 * Commands of SC6000's DSP (SBPRO+special).
 * Some of them are COMMAND_xx, in the future they may change.
 */
#define WRITE_MDIRQ_CFG	0x50	/* Set M&I&DRQ mask (the real config)	*/
#define COMMAND_52	0x52	/*					*/
#define READ_HARD_CFG	0x58	/* Read Hardware Config (I/O base etc)	*/
#define COMMAND_5C	0x5c	/*					*/
#define COMMAND_60	0x60	/*					*/
#define COMMAND_66	0x66	/*					*/
#define COMMAND_6C	0x6c	/*					*/
#define COMMAND_6E	0x6e	/*					*/
#define COMMAND_88	0x88	/* Unknown command 			*/
#define DSP_INIT_MSS	0x8c	/* Enable Microsoft Sound System mode	*/
#define COMMAND_C5	0xc5	/*					*/
#define GET_DSP_VERSION	0xe1	/* Get DSP Version			*/
#define GET_DSP_COPYRIGHT 0xe3	/* Get DSP Copyright			*/

/*
 * Offsets of SC6000 DSP I/O ports. The offset is added to base I/O port
 * to have the actual I/O port.
 * Register permissions are:
 * (wo) == Write Only
 * (ro) == Read  Only
 * (w-) == Write
 * (r-) == Read
 */
#define DSP_RESET	0x06	/* offset of DSP RESET		(wo) */
#define DSP_READ	0x0a	/* offset of DSP READ		(ro) */
#define DSP_WRITE	0x0c	/* offset of DSP WRITE		(w-) */
#define DSP_COMMAND	0x0c	/* offset of DSP COMMAND	(w-) */
#define DSP_STATUS	0x0c	/* offset of DSP STATUS		(r-) */
#define DSP_DATAVAIL	0x0e	/* offset of DSP DATA AVAILABLE	(ro) */

#define PFX "sc6000: "
#define DRV_NAME "SC-6000"

/* hardware dependent functions */

/*
 * sc6000_irq_to_softcfg - Decode irq number into cfg code.
 */
static __devinit unsigned char sc6000_irq_to_softcfg(int irq)
{
	unsigned char val = 0;

	switch (irq) {
	case 5:
		val = 0x28;
		break;
	case 7:
		val = 0x8;
		break;
	case 9:
		val = 0x10;
		break;
	case 10:
		val = 0x18;
		break;
	case 11:
		val = 0x20;
		break;
	default:
		break;
	}
	return val;
}

/*
 * sc6000_dma_to_softcfg - Decode dma number into cfg code.
 */
static __devinit unsigned char sc6000_dma_to_softcfg(int dma)
{
	unsigned char val = 0;

	switch (dma) {
	case 0:
		val = 1;
		break;
	case 1:
		val = 2;
		break;
	case 3:
		val = 3;
		break;
	default:
		break;
	}
	return val;
}

/*
 * sc6000_mpu_irq_to_softcfg - Decode MPU-401 irq number into cfg code.
 */
static __devinit unsigned char sc6000_mpu_irq_to_softcfg(int mpu_irq)
{
	unsigned char val = 0;

	switch (mpu_irq) {
	case 5:
		val = 4;
		break;
	case 7:
		val = 0x44;
		break;
	case 9:
		val = 0x84;
		break;
	case 10:
		val = 0xc4;
		break;
	default:
		break;
	}
	return val;
}

static __devinit int sc6000_wait_data(char __iomem *vport)
{
	int loop = 1000;
	unsigned char val = 0;

	do {
		val = ioread8(vport + DSP_DATAVAIL);
		if (val & 0x80)
			return 0;
		cpu_relax();
	} while (loop--);

	return -EAGAIN;
}

static __devinit int sc6000_read(char __iomem *vport)
{
	if (sc6000_wait_data(vport))
		return -EBUSY;

	return ioread8(vport + DSP_READ);

}

static __devinit int sc6000_write(char __iomem *vport, int cmd)
{
	unsigned char val;
	int loop = 500000;

	do {
		val = ioread8(vport + DSP_STATUS);
		/*
		 * DSP ready to receive data if bit 7 of val == 0
		 */
		if (!(val & 0x80)) {
			iowrite8(cmd, vport + DSP_COMMAND);
			return 0;
		}
		cpu_relax();
	} while (loop--);

	snd_printk(KERN_ERR "DSP Command (0x%x) timeout.\n", cmd);

	return -EIO;
}

static int __devinit sc6000_dsp_get_answer(char __iomem *vport, int command,
					   char *data, int data_len)
{
	int len = 0;

	if (sc6000_write(vport, command)) {
		snd_printk(KERN_ERR "CMD 0x%x: failed!\n", command);
		return -EIO;
	}

	do {
		int val = sc6000_read(vport);

		if (val < 0)
			break;

		data[len++] = val;

	} while (len < data_len);

	/*
	 * If no more data available, return to the caller, no error if len>0.
	 * We have no other way to know when the string is finished.
	 */
	return len ? len : -EIO;
}

static int __devinit sc6000_dsp_reset(char __iomem *vport)
{
	iowrite8(1, vport + DSP_RESET);
	udelay(10);
	iowrite8(0, vport + DSP_RESET);
	udelay(20);
	if (sc6000_read(vport) == 0xaa)
		return 0;
	return -ENODEV;
}

/* detection and initialization */
static int __devinit sc6000_cfg_write(char __iomem *vport,
				      unsigned char softcfg)
{

	if (sc6000_write(vport, WRITE_MDIRQ_CFG)) {
		snd_printk(KERN_ERR "CMD 0x%x: failed!\n", WRITE_MDIRQ_CFG);
		return -EIO;
	}
	if (sc6000_write(vport, softcfg)) {
		snd_printk(KERN_ERR "sc6000_cfg_write: failed!\n");
		return -EIO;
	}
	return 0;
}

static int __devinit sc6000_setup_board(char __iomem *vport, int config)
{
	int loop = 10;

	do {
		if (sc6000_write(vport, COMMAND_88)) {
			snd_printk(KERN_ERR "CMD 0x%x: failed!\n",
				   COMMAND_88);
			return -EIO;
		}
	} while ((sc6000_wait_data(vport) < 0) && loop--);

	if (sc6000_read(vport) < 0) {
		snd_printk(KERN_ERR "sc6000_read after CMD 0x%x: failed\n",
			   COMMAND_88);
		return -EIO;
	}

	if (sc6000_cfg_write(vport, config))
		return -ENODEV;

	return 0;
}

static int __devinit sc6000_init_mss(char __iomem *vport, int config,
				     char __iomem *vmss_port, int mss_config)
{
	if (sc6000_write(vport, DSP_INIT_MSS)) {
		snd_printk(KERN_ERR "sc6000_init_mss [0x%x]: failed!\n",
			   DSP_INIT_MSS);
		return -EIO;
	}

	msleep(10);