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