#define GSCD_VERSION "0.4a Oliver Raupach " /* linux/drivers/block/gscd.c - GoldStar R420 CDROM driver Copyright (C) 1995 Oliver Raupach based upon pre-works by Eberhard Moenkeberg For all kind of other information about the GoldStar CDROM and this Linux device driver I installed a WWW-URL: http://linux.rz.fh-hannover.de/~raupach If you are the editor of a Linux CD, you should enable gscd.c within your boot floppy kernel and send me one of your CDs for free. -------------------------------------------------------------------- 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, 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. -------------------------------------------------------------------- 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 */ /* These settings are for various debug-level. Leave they untouched ... */ #define NO_GSCD_DEBUG #define NO_IOCTL_DEBUG #define NO_MODULE_DEBUG #define NO_FUTURE_WORK /*------------------------*/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MAJOR_NR GOLDSTAR_CDROM_MAJOR #include #define gscd_port gscd /* for compatible parameter passing with "insmod" */ #include "gscd.h" static int gscd_blocksizes[1] = { 512 }; static int gscdPresent = 0; static unsigned char gscd_buf[2048]; /* buffer for block size conversion */ static int gscd_bn = -1; static short gscd_port = GSCD_BASE_ADDR; MODULE_PARM(gscd, "h"); /* Kommt spaeter vielleicht noch mal dran ... * static DECLARE_WAIT_QUEUE_HEAD(gscd_waitq); */ static void gscd_transfer(void); static void gscd_read_cmd(void); static void gscd_hsg2msf(long hsg, struct msf *msf); static void gscd_bin2bcd(unsigned char *p); /* Schnittstellen zum Kern/FS */ static void do_gscd_request(request_queue_t *); static void __do_gscd_request(unsigned long dummy); static int gscd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); static int gscd_open(struct inode *, struct file *); static int gscd_release(struct inode *, struct file *); static int check_gscd_med_chg(kdev_t); /* GoldStar Funktionen */ static void cc_Reset(void); static int wait_drv_ready(void); static int find_drives(void); static void cmd_out(int, char *, char *, int); static void cmd_status(void); static void cc_Ident(char *); static void cc_SetSpeed(void); static void init_cd_drive(int); static int get_status(void); static void clear_Audio(void); static void cc_invalidate(void); /* some things for the next version */ #ifdef FUTURE_WORK static void update_state(void); static long gscd_msf2hsg(struct msf *mp); static int gscd_bcd2bin(unsigned char bcd); #endif /* common GoldStar Initialization */ static int my_gscd_init(void); /* lo-level cmd-Funktionen */ static void cmd_info_in(char *, int); static void cmd_end(void); static void cmd_read_b(char *, int, int); static void cmd_read_w(char *, int, int); static int cmd_unit_alive(void); static void cmd_write_cmd(char *); /* GoldStar Variablen */ static int curr_drv_state; static int drv_states[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; static int drv_mode; static int disk_state; static int speed; static int ndrives; static unsigned char drv_num_read; static unsigned char f_dsk_valid; static unsigned char current_drive; static unsigned char f_drv_ok; static char f_AudioPlay; static char f_AudioPause; static int AudioStart_m; static int AudioStart_f; static int AudioEnd_m; static int AudioEnd_f; static struct timer_list gscd_timer; static struct block_device_operations gscd_fops = { owner:THIS_MODULE, open:gscd_open, release:gscd_release, ioctl:gscd_ioctl, check_media_change:check_gscd_med_chg, }; /* * Checking if the media has been changed * (not yet implemented) */ static int check_gscd_med_chg(kdev_t full_dev) { int target; target = MINOR(full_dev); if (target > 0) { printk ("GSCD: GoldStar CD-ROM request error: invalid device.\n"); return 0; } #ifdef GSCD_DEBUG printk("gscd: check_med_change\n"); #endif return 0; } #ifndef MODULE /* Using new interface for kernel-parameters */ static int __init gscd_setup(char *str) { int ints[2]; (void) get_options(str, ARRAY_SIZE(ints), ints); if (ints[0] > 0) { gscd_port = ints[1]; } return 1; } __setup("gscd=", gscd_setup); #endif static int gscd_ioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) { unsigned char to_do[10]; unsigned char dummy; switch (cmd) { case CDROMSTART: /* Spin up the drive */ /* Don't think we can do this. Even if we could, * I think the drive times out and stops after a while * anyway. For now, ignore it. */ return 0; case CDROMRESUME: /* keine Ahnung was das ist */ return 0; case CDROMEJECT: cmd_status(); to_do[0] = CMD_TRAY_CTL; cmd_out(TYPE_INFO, (char *) &to_do, (char *) &dummy, 0); return 0; default: return -EINVAL; } } /* * Take care of the different block sizes between cdrom and Linux. * When Linux gets variable block sizes this will probably go away. */ static void gscd_transfer(void) { long offs; while (CURRENT->nr_sectors > 0 && gscd_bn == CURRENT->sector / 4) { offs = (CURRENT->sector & 3) * 512; memcpy(CURRENT->buffer, gscd_buf + offs, 512); CURRENT->nr_sectors--; CURRENT->sector++; CURRENT->buffer += 512; } } /* * I/O request routine called from Linux kernel. */ static void do_gscd_request(request_queue_t * q) { __do_gscd_request(0); } static void __do_gscd_request(unsigned long dummy) { unsigned int block, dev; unsigned int nsect; repeat: if (QUEUE_EMPTY || CURRENT->rq_status == RQ_INACTIVE) goto out; INIT_REQUEST; dev = MINOR(CURRENT->rq_dev); block = CURRENT->sector; nsect = CURRENT->nr_sectors; if (QUEUE_EMPTY || CURRENT->sector == -1) goto out; if (CURRENT->cmd != READ) { printk("GSCD: bad cmd %d\n", CURRENT->cmd); end_request(0); goto repeat; } if (MINOR(CURRENT->rq_dev) != 0) { printk("GSCD: this version supports only one device\n"); end_request(0); goto repeat; } gscd_transfer(); /* if we satisfied the request from the buffer, we're done. */ if (CURRENT->nr_sectors == 0) { end_request(1); goto repeat; } #ifdef GSCD_DEBUG printk("GSCD: dev %d, block %d, nsect %d\n", dev, block, nsect); #endif gscd_read_cmd(); out: return; } /* * Check the result of the set-mode command. On success, send the * read-data command. */ static void gscd_read_cmd(void) { long block; struct gscd_Play_msf gscdcmd; char cmd[] = { CMD_READ, 0x80, 0, 0, 0, 0, 1 }; /* cmd mode M-S-F secth sectl */ cmd_status(); if (disk_state & (ST_NO_DISK | ST_DOOR_OPEN)) { printk("GSCD: no disk or door open\n"); end_request(0); } else { if (disk_state & ST_INVALID) { printk("GSCD: disk invalid\n"); end_request(0); } else { gscd_bn = -1; /* purge our buffer */ block = CURRENT->sector / 4; gscd_hsg2msf(block, &gscdcmd.start); /* cvt to msf format */ cmd[2] = gscdcmd.start.min; cmd[3] = gscdcmd.start.sec; cmd[4] = gscdcmd.start.frame; #ifdef GSCD_DEBUG printk("GSCD: read msf %d:%d:%d\n", cmd[2], cmd[3], cmd[4]); #endif cmd_out(TYPE_DATA, (char *) &cmd, (char *) &gscd_buf[0], 1); gscd_bn = CURRENT->sector / 4; gscd_transfer(); end_request(1); } } SET_TIMER(__do_gscd_request, 1); } /* * Open the device special file. Check that a disk is in. */ static int gscd_open(struct inode *ip, struct file *fp) { int st; #ifdef GSCD_DEBUG printk("GSCD: open\n"); #endif if (gscdPresent == 0) return -ENXIO; /* no hardware */ get_status(); st = disk_state & (ST_NO_DISK | ST_DOOR_OPEN); if (st) { printk("GSCD: no disk or door open\n"); return -ENXIO; } /* if (updateToc() < 0) return -EIO; */ return 0; } /* * On close, we flush all gscd blocks from the buffer cache. */ static int gscd_release(struct inode *inode, struct file *file) { #ifdef GSCD_DEBUG printk("GSCD: release\n"); #endif gscd_bn = -1; return 0; } int get_status(void) { int status; cmd_status(); status = disk_state & (ST_x08 | ST_x04 | ST_INVALID | ST_x01); if (status == (ST_x08 | ST_x04 | ST_INVALID | ST_x01)) { cc_invalidate(); return 1; } else { return 0; } } void cc_invalidate(void) { drv_num_read = 0xFF; f_dsk_valid = 0xFF; current_drive = 0xFF; f_drv_ok = 0xFF; clear_Audio(); } void clear_Audio(void) { f_AudioPlay = 0; f_AudioPause = 0; AudioStart_m = 0; AudioStart_f = 0; AudioEnd_m = 0; AudioEnd_f = 0; } /* * waiting ? */ int wait_drv_ready(void) { int found, read; do { found = inb(GSCDPORT(0)); found &= 0x0f; read = inb(GSCDPORT(0)); read &= 0x0f; } while (read != found); #ifdef GSCD_DEBUG printk("Wait for: %d\n", read); #endif return read; } void cc_Ident(char *respons) { char to_do[] = { CMD_IDENT, 0, 0 }; cmd_out(TYPE_INFO, (char *) &to_do, (char *) respons, (int) 0x1E); } void cc_SetSpeed(void) { char to_do[] = { CMD_SETSPEED, 0, 0 }; char dummy; if (speed > 0) { to_do[1] = speed & 0x0F; cmd_out(TYPE_INFO, (char *) &to_do, (char *) &dummy, 0); } } void cc_Reset(void) { char to_do[] = { CMD_RESET, 0 }; char dummy; cmd_out(TYPE_INFO, (char *) &to_do, (char *) &dummy, 0); } void cmd_status(void) { char to_do[] = { CMD_STATUS, 0 }; char dummy; cmd_out(TYPE_INFO, (char *) &to_do, (char *) &dummy, 0); #ifdef GSCD_DEBUG printk("GSCD: Status: %d\n", disk_state); #endif } void cmd_out(int cmd_type, char *cmd, char *respo_buf, int respo_count) { int result; result = wait_drv_ready(); if (result != drv_mode) { unsigned long test_loops = 0xFFFF; int i, dummy; outb(curr_drv_state, GSCDPORT(0)); /* LOCLOOP_170 */ do { result = wait_drv_ready(); test_loops--; } while ((result != drv_mode) && (test_loops > 0)); if (result != drv_mode) { disk_state = ST_x08 | ST_x04 | ST_INVALID; return; } /* ...and waiting */ for (i = 1, dummy = 1; i < 0xFFFF; i++) { dummy *= i; } } /* LOC_172 */ /* check the unit */ /* and wake it up */ if (cmd_unit_alive() != 0x08) { /* LOC_174 */ /* game over for this unit */ disk_state = ST_x08 | ST_x04 | ST_INVALID; return; } /* LOC_176 */ #ifdef GSCD_DEBUG printk("LOC_176 "); #endif if (drv_mode == 0x09) { /* magic... */ printk("GSCD: magic ...\n"); outb(result, GSCDPORT(2)); } /* write the command to the drive */ cmd_write_cmd(cmd); /* LOC_178 */ for (;;) { result = wait_drv_ready(); if (result != drv_mode) { /* LOC_179 */ if (result == 0x04) { /* Mode 4 */ /* LOC_205 */ #ifdef GSCD_DEBUG printk("LOC_205 "); #endif disk_state = inb(GSCDPORT(2)); do { result = wait_drv_ready(); } while (result != drv_mode); return; } else { if (result == 0x06) { /* Mode 6 */ /* LOC_181 */ #ifdef GSCD_DEBUG printk("LOC_181 "); #endif if (cmd_type == TYPE_DATA) { /* read data */ /* LOC_184 */ if (drv_mode == 9) { /* read the data to the buffer (word) */ /* (*(cmd+1))?(CD_FRAMESIZE/2):(CD_FRAMESIZE_RAW/2) */ cmd_read_w (respo_buf, respo_count, CD_FRAMESIZE / 2); return; } else { /* read the data to the buffer (byte) */ /* (*(cmd+1))?(CD_FRAMESIZE):(CD_FRAMESIZE_RAW) */ cmd_read_b (respo_buf, respo_count, CD_FRAMESIZE); return; } } else { /* read the info to the buffer */ cmd_info_in(respo_buf, respo_count); return; } return; } } } else { disk_state = ST_x08 | ST_x04 | ST_INVALID; return; } } /* for (;;) */ #ifdef GSCD_DEBUG printk("\n"); #endif } static void cmd_write_cmd(char *pstr) { int i, j; /* LOC_177 */ #ifdef GSCD_DEBUG printk("LOC_177 "); #endif /* calculate the number of parameter */ j = *pstr & 0x0F; /* shift it out */ for (i = 0; i < j; i++) { outb(*pstr, GSCDPORT(2)); pstr++; } } static int cmd_unit_alive(void) { int result; unsigned long max_test_loops; /* LOC_172 */ #ifdef GSCD_DEBUG printk("LOC_172 "); #endif outb(curr_drv_state, GSCDPORT(0)); max_test_loops = 0xFFFF; do { result = wait_drv_ready(); max_test_loops--; } while ((result != 0x08) && (max_test_loops > 0)); return result; } static void cmd_info_in(char *pb, int count) { int result; char read; /* read info */ /* LOC_182 */ #ifdef GSCD_DEBUG printk("LOC_182 "); #endif do { read = inb(GSCDPORT(2)); if (count > 0) { *pb = read; pb++; count--; } /* LOC_183 */ do { result = wait_drv_ready(); } while (result == 0x0E); } while (result == 6); cmd_end(); return; } static void cmd_read_b(char *pb, int count, int size) { int result; int i; /* LOC_188 */ /* LOC_189 */ #ifdef GSCD_DEBUG printk("LOC_189 "); #endif do { do { result = wait_drv_ready(); } while (result != 6 || result == 0x0E); if (result != 6) { cmd_end(); return; } #ifdef GSCD_DEBUG printk("LOC_191 "); #endif for (i = 0; i < size; i++) { *pb = inb(GSCDPORT(2)); pb++; } count--; } while (count > 0); cmd_end(); return; } static void cmd_end(void) { int result; /* LOC_204 */ #ifdef GSCD_DEBUG printk("LOC_204 "); #endif do { result = wait_drv_ready(); if (result == drv_mode) { return; } } while (result != 4); /* LOC_205 */ #ifdef GSCD_DEBUG printk("LOC_205 "); #endif disk_state = inb(GSCDPORT(2)); do { result = wait_drv_ready(); } while (result != drv_mode); return; } static void cmd_read_w(char *pb, int count, int size) { int result; int i; #ifdef GSCD_DEBUG printk("LOC_185 "); #endif do { /* LOC_185 */ do { result = wait_drv_ready(); } while (result != 6 || result == 0x0E); if (result != 6) { cmd_end(); return; } for (i = 0; i < size; i++) { /* na, hier muss ich noch mal drueber nachdenken */ *pb = inw(GSCDPORT(2)); pb++; } count--; } while (count > 0); cmd_end(); return; } int __init find_drives(void) { int *pdrv; int drvnum; int subdrv; int i; speed = 0; pdrv = (int *) &drv_states; curr_drv_state = 0xFE; subdrv = 0; drvnum = 0; for (i = 0; i < 8; i++) { subdrv++; cmd_status(); disk_state &= ST_x08 | ST_x04 | ST_INVALID | ST_x01; if (disk_state != (ST_x08 | ST_x04 | ST_INVALID)) { /* LOC_240 */ *pdrv = curr_drv_state; init_cd_drive(drvnum); pdrv++; drvnum++; } else { if (subdrv < 2) { continue; } else { subdrv = 0; } } /* curr_drv_state<<1; <-- das geht irgendwie nicht */ /* muss heissen: curr_drv_state <<= 1; (ist ja Wert-Zuweisung) */ curr_drv_state *= 2; curr_drv_state |= 1; #ifdef GSCD_DEBUG printk("DriveState: %d\n", curr_drv_state); #endif } ndrives = drvnum; return drvnum; } void __init init_cd_drive(int num) { char resp[50]; int i; printk("GSCD: init unit %d\n", num); cc_Ident((char *) &resp); printk("GSCD: identification: "); for (i = 0; i < 0x1E; i++) { printk("%c", resp[i]); } printk("\n"); cc_SetSpeed(); } #ifdef FUTURE_WORK /* return_done */ static void update_state(void) { unsigned int AX; if ((disk_state & (ST_x08 | ST_x04 | ST_INVALID | ST_x01)) == 0) { if (disk_state == (ST_x08 | ST_x04 | ST_INVALID)) { AX = ST_INVALID; } if ((disk_state & (ST_x08 | ST_x04 | ST_INVALID | ST_x01)) == 0) { invalidate(); f_drv_ok = 0; } AX |= 0x8000; } if (disk_state & ST_PLAYING) { AX |= 0x200; } AX |= 0x100; /* pkt_esbx = AX; */ disk_state = 0; } #endif /* Init for the Module-Version */ int init_gscd(void) { long err; /* call the GoldStar-init */ err = my_gscd_init(); if (err < 0) { return err; } else { printk(KERN_INFO "Happy GoldStar !\n"); return 0; } } void __exit exit_gscd(void) { CLEAR_TIMER; devfs_unregister(devfs_find_handle (NULL, "gscd", 0, 0, DEVFS_SPECIAL_BLK, 0)); if ((devfs_unregister_blkdev(MAJOR_NR, "gscd") == -EINVAL)) { printk("What's that: can't unregister GoldStar-module\n"); return; } blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR)); release_region(gscd_port, 4); printk(KERN_INFO "GoldStar-module released.\n"); } #ifdef MODULE module_init(init_gscd); #endif module_exit(exit_gscd); /* Test for presence of drive and initialize it. Called only at boot time. */ int __init gscd_init(void) { return my_gscd_init(); } /* This is the common initialisation for the GoldStar drive. */ /* It is called at boot time AND for module init. */ int __init my_gscd_init(void) { int i; int result; printk(KERN_INFO "GSCD: version %s\n", GSCD_VERSION); printk(KERN_INFO "GSCD: Trying to detect a Goldstar R420 CD-ROM drive at 0x%X.\n", gscd_port); if (check_region(gscd_port, 4)) { printk ("GSCD: Init failed, I/O port (%X) already in use.\n", gscd_port); return -EIO; } /* check for card */ result = wait_drv_ready(); if (result == 0x09) { printk("GSCD: DMA kann ich noch nicht!\n"); return -EIO; } if (result == 0x0b) { drv_mode = result; i = find_drives(); if (i == 0) { printk ("GSCD: GoldStar CD-ROM Drive is not found.\n"); return -EIO; } } if ((result != 0x0b) && (result != 0x09)) { printk ("GSCD: GoldStar Interface Adapter does not exist or H/W error\n"); return -EIO; } /* reset all drives */ i = 0; while (drv_states[i] != 0) { curr_drv_state = drv_states[i]; printk(KERN_INFO "GSCD: Reset unit %d ... ", i); cc_Reset(); printk("done\n"); i++; } if (devfs_register_blkdev(MAJOR_NR, "gscd", &gscd_fops) != 0) { printk ("GSCD: Unable to get major %d for GoldStar CD-ROM\n", MAJOR_NR); return -EIO; } devfs_register(NULL, "gscd", DEVFS_FL_DEFAULT, MAJOR_NR, 0, S_IFBLK | S_IRUGO | S_IWUGO, &gscd_fops, NULL); blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST); blksize_size[MAJOR_NR] = gscd_blocksizes; read_ahead[MAJOR_NR] = 4; disk_state = 0; gscdPresent = 1; request_region(gscd_port, 4, "gscd"); register_disk(NULL, MKDEV(MAJOR_NR, 0), 1, &gscd_fops, 0); printk(KERN_INFO "GSCD: GoldStar CD-ROM Drive found.\n"); return 0; } static void gscd_hsg2msf(long hsg, struct msf *msf) { hsg += CD_MSF_OFFSET; msf->min = hsg / (CD_FRAMES * CD_SECS); hsg %= CD_FRAMES * CD_SECS; msf->sec = hsg / CD_FRAMES; msf->frame = hsg % CD_FRAMES; gscd_bin2bcd(&msf->min); /* convert to BCD */ gscd_bin2bcd(&msf->sec); gscd_bin2bcd(&msf->frame); } static void gscd_bin2bcd(unsigned char *p) { int u, t; u = *p % 10; t = *p / 10; *p = u | (t << 4); } #ifdef FUTURE_WORK static long gscd_msf2hsg(struct msf *mp) { return gscd_bcd2bin(mp->frame) + gscd_bcd2bin(mp->sec) * CD_FRAMES + gscd_bcd2bin(mp->min) * CD_FRAMES * CD_SECS - CD_MSF_OFFSET; } static int gscd_bcd2bin(unsigned char bcd) { return (bcd >> 4) * 10 + (bcd & 0xF); } #endif MODULE_AUTHOR("Oliver Raupach "); MODULE_LICENSE("GPL"); EXPORT_NO_SYMBOLS;