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linux-sg2042/drivers/cdrom/isp16.c

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/* -- ISP16 cdrom detection and configuration
*
* Copyright (c) 1995,1996 Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl>
*
* Version 0.6
*
* History:
* 0.5 First release.
* Was included in the sjcd and optcd cdrom drivers.
* 0.6 First "stand-alone" version.
* Removed sound configuration.
* Added "module" support.
*
* 9 November 1999 -- Make kernel-parameter implementation work with 2.3.x
* Removed init_module & cleanup_module in favor of
* module_init & module_exit.
* Torben Mathiasen <tmm@image.dk>
*
* 19 June 2004 -- check_region() converted to request_region()
* and return statement cleanups.
* Jesper Juhl <juhl-lkml@dif.dk>
*
* Detect cdrom interface on ISP16 sound card.
* Configure cdrom interface.
*
* Algorithm for the card with OPTi 82C928 taken
* from the CDSETUP.SYS driver for MSDOS,
* by OPTi Computers, version 2.03.
* Algorithm for the card with OPTi 82C929 as communicated
* to me by Vadim Model and Leo Spiekman.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define ISP16_VERSION_MAJOR 0
#define ISP16_VERSION_MINOR 6
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <asm/io.h>
#include "isp16.h"
static short isp16_detect(void);
static short isp16_c928__detect(void);
static short isp16_c929__detect(void);
static short isp16_cdi_config(int base, u_char drive_type, int irq,
int dma);
static short isp16_type; /* dependent on type of interface card */
static u_char isp16_ctrl;
static u_short isp16_enable_port;
static int isp16_cdrom_base = ISP16_CDROM_IO_BASE;
static int isp16_cdrom_irq = ISP16_CDROM_IRQ;
static int isp16_cdrom_dma = ISP16_CDROM_DMA;
static char *isp16_cdrom_type = ISP16_CDROM_TYPE;
module_param(isp16_cdrom_base, int, 0);
module_param(isp16_cdrom_irq, int, 0);
module_param(isp16_cdrom_dma, int, 0);
module_param(isp16_cdrom_type, charp, 0);
#define ISP16_IN(p) (outb(isp16_ctrl,ISP16_CTRL_PORT), inb(p))
#define ISP16_OUT(p,b) (outb(isp16_ctrl,ISP16_CTRL_PORT), outb(b,p))
#ifndef MODULE
static int
__init isp16_setup(char *str)
{
int ints[4];
(void) get_options(str, ARRAY_SIZE(ints), ints);
if (ints[0] > 0)
isp16_cdrom_base = ints[1];
if (ints[0] > 1)
isp16_cdrom_irq = ints[2];
if (ints[0] > 2)
isp16_cdrom_dma = ints[3];
if (str)
isp16_cdrom_type = str;
return 1;
}
__setup("isp16=", isp16_setup);
#endif /* MODULE */
/*
* ISP16 initialisation.
*
*/
static int __init isp16_init(void)
{
u_char expected_drive;
printk(KERN_INFO
"ISP16: configuration cdrom interface, version %d.%d.\n",
ISP16_VERSION_MAJOR, ISP16_VERSION_MINOR);
if (!strcmp(isp16_cdrom_type, "noisp16")) {
printk("ISP16: no cdrom interface configured.\n");
return 0;
}
if (!request_region(ISP16_IO_BASE, ISP16_IO_SIZE, "isp16")) {
printk("ISP16: i/o ports already in use.\n");
goto out;
}
if ((isp16_type = isp16_detect()) < 0) {
printk("ISP16: no cdrom interface found.\n");
goto cleanup_out;
}
printk(KERN_INFO
"ISP16: cdrom interface (with OPTi 82C92%d chip) detected.\n",
(isp16_type == 2) ? 9 : 8);
if (!strcmp(isp16_cdrom_type, "Sanyo"))
expected_drive =
(isp16_type ? ISP16_SANYO1 : ISP16_SANYO0);
else if (!strcmp(isp16_cdrom_type, "Sony"))
expected_drive = ISP16_SONY;
else if (!strcmp(isp16_cdrom_type, "Panasonic"))
expected_drive =
(isp16_type ? ISP16_PANASONIC1 : ISP16_PANASONIC0);
else if (!strcmp(isp16_cdrom_type, "Mitsumi"))
expected_drive = ISP16_MITSUMI;
else {
printk("ISP16: %s not supported by cdrom interface.\n",
isp16_cdrom_type);
goto cleanup_out;
}
if (isp16_cdi_config(isp16_cdrom_base, expected_drive,
isp16_cdrom_irq, isp16_cdrom_dma) < 0) {
printk
("ISP16: cdrom interface has not been properly configured.\n");
goto cleanup_out;
}
printk(KERN_INFO
"ISP16: cdrom interface set up with io base 0x%03X, irq %d, dma %d,"
" type %s.\n", isp16_cdrom_base, isp16_cdrom_irq,
isp16_cdrom_dma, isp16_cdrom_type);
return 0;
cleanup_out:
release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
out:
return -EIO;
}
static short __init isp16_detect(void)
{
if (isp16_c929__detect() >= 0)
return 2;
else
return (isp16_c928__detect());
}
static short __init isp16_c928__detect(void)
{
u_char ctrl;
u_char enable_cdrom;
u_char io;
short i = -1;
isp16_ctrl = ISP16_C928__CTRL;
isp16_enable_port = ISP16_C928__ENABLE_PORT;
/* read' and write' are a special read and write, respectively */
/* read' ISP16_CTRL_PORT, clear last two bits and write' back the result */
ctrl = ISP16_IN(ISP16_CTRL_PORT) & 0xFC;
ISP16_OUT(ISP16_CTRL_PORT, ctrl);
/* read' 3,4 and 5-bit from the cdrom enable port */
enable_cdrom = ISP16_IN(ISP16_C928__ENABLE_PORT) & 0x38;
if (!(enable_cdrom & 0x20)) { /* 5-bit not set */
/* read' last 2 bits of ISP16_IO_SET_PORT */
io = ISP16_IN(ISP16_IO_SET_PORT) & 0x03;
if (((io & 0x01) << 1) == (io & 0x02)) { /* bits are the same */
if (io == 0) { /* ...the same and 0 */
i = 0;
enable_cdrom |= 0x20;
} else { /* ...the same and 1 *//* my card, first time 'round */
i = 1;
enable_cdrom |= 0x28;
}
ISP16_OUT(ISP16_C928__ENABLE_PORT, enable_cdrom);
} else { /* bits are not the same */
ISP16_OUT(ISP16_CTRL_PORT, ctrl);
return i; /* -> not detected: possibly incorrect conclusion */
}
} else if (enable_cdrom == 0x20)
i = 0;
else if (enable_cdrom == 0x28) /* my card, already initialised */
i = 1;
ISP16_OUT(ISP16_CTRL_PORT, ctrl);
return i;
}
static short __init isp16_c929__detect(void)
{
u_char ctrl;
u_char tmp;
isp16_ctrl = ISP16_C929__CTRL;
isp16_enable_port = ISP16_C929__ENABLE_PORT;
/* read' and write' are a special read and write, respectively */
/* read' ISP16_CTRL_PORT and save */
ctrl = ISP16_IN(ISP16_CTRL_PORT);
/* write' zero to the ctrl port and get response */
ISP16_OUT(ISP16_CTRL_PORT, 0);
tmp = ISP16_IN(ISP16_CTRL_PORT);
if (tmp != 2) /* isp16 with 82C929 not detected */
return -1;
/* restore ctrl port value */
ISP16_OUT(ISP16_CTRL_PORT, ctrl);
return 2;
}
static short __init
isp16_cdi_config(int base, u_char drive_type, int irq, int dma)
{
u_char base_code;
u_char irq_code;
u_char dma_code;
u_char i;
if ((drive_type == ISP16_MITSUMI) && (dma != 0))
printk("ISP16: Mitsumi cdrom drive has no dma support.\n");
switch (base) {
case 0x340:
base_code = ISP16_BASE_340;
break;
case 0x330:
base_code = ISP16_BASE_330;
break;
case 0x360:
base_code = ISP16_BASE_360;
break;
case 0x320:
base_code = ISP16_BASE_320;
break;
default:
printk
("ISP16: base address 0x%03X not supported by cdrom interface.\n",
base);
return -1;
}
switch (irq) {
case 0:
irq_code = ISP16_IRQ_X;
break; /* disable irq */
case 5:
irq_code = ISP16_IRQ_5;
printk("ISP16: irq 5 shouldn't be used by cdrom interface,"
" due to possible conflicts with the sound card.\n");
break;
case 7:
irq_code = ISP16_IRQ_7;
printk("ISP16: irq 7 shouldn't be used by cdrom interface,"
" due to possible conflicts with the sound card.\n");
break;
case 3:
irq_code = ISP16_IRQ_3;
break;
case 9:
irq_code = ISP16_IRQ_9;
break;
case 10:
irq_code = ISP16_IRQ_10;
break;
case 11:
irq_code = ISP16_IRQ_11;
break;
default:
printk("ISP16: irq %d not supported by cdrom interface.\n",
irq);
return -1;
}
switch (dma) {
case 0:
dma_code = ISP16_DMA_X;
break; /* disable dma */
case 1:
printk("ISP16: dma 1 cannot be used by cdrom interface,"
" due to conflict with the sound card.\n");
return -1;
break;
case 3:
dma_code = ISP16_DMA_3;
break;
case 5:
dma_code = ISP16_DMA_5;
break;
case 6:
dma_code = ISP16_DMA_6;
break;
case 7:
dma_code = ISP16_DMA_7;
break;
default:
printk("ISP16: dma %d not supported by cdrom interface.\n",
dma);
return -1;
}
if (drive_type != ISP16_SONY && drive_type != ISP16_PANASONIC0 &&
drive_type != ISP16_PANASONIC1 && drive_type != ISP16_SANYO0 &&
drive_type != ISP16_SANYO1 && drive_type != ISP16_MITSUMI &&
drive_type != ISP16_DRIVE_X) {
printk
("ISP16: drive type (code 0x%02X) not supported by cdrom"
" interface.\n", drive_type);
return -1;
}
/* set type of interface */
i = ISP16_IN(ISP16_DRIVE_SET_PORT) & ISP16_DRIVE_SET_MASK; /* clear some bits */
ISP16_OUT(ISP16_DRIVE_SET_PORT, i | drive_type);
/* enable cdrom on interface with 82C929 chip */
if (isp16_type > 1)
ISP16_OUT(isp16_enable_port, ISP16_ENABLE_CDROM);
/* set base address, irq and dma */
i = ISP16_IN(ISP16_IO_SET_PORT) & ISP16_IO_SET_MASK; /* keep some bits */
ISP16_OUT(ISP16_IO_SET_PORT, i | base_code | irq_code | dma_code);
return 0;
}
static void __exit isp16_exit(void)
{
release_region(ISP16_IO_BASE, ISP16_IO_SIZE);
printk(KERN_INFO "ISP16: module released.\n");
}
module_init(isp16_init);
module_exit(isp16_exit);
MODULE_LICENSE("GPL");
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