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linux/drivers/cdrom/isp16.c
Jesper Juhl 59904159c3 [PATCH] Update CREDITS entry and listings in source files for Jesper Juhl 
a) update entry in CREDITS for Jesper Juhl
b) remove email address from source files so it's only listed in credits.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27 16:26:20 -07:00

374 lines
9.6 KiB
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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
*
* 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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