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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [legacy/] [umc8672.c] - Rev 1765
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/* * linux/drivers/ide/legacy/umc8672.c Version 0.05 Jul 31, 1996 * * Copyright (C) 1995-1996 Linus Torvalds & author (see below) */ /* * Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien) * * This file provides support for the advanced features * of the UMC 8672 IDE interface. * * Version 0.01 Initial version, hacked out of ide.c, * and #include'd rather than compiled separately. * This will get cleaned up in a subsequent release. * * Version 0.02 now configs/compiles separate from ide.c -ml * Version 0.03 enhanced auto-tune, fix display bug * Version 0.05 replace sti() with restore_flags() -ml * add detection of possible race condition -ml */ /* * VLB Controller Support from * Wolfram Podien * Rohoefe 3 * D28832 Achim * Germany * * To enable UMC8672 support there must a lilo line like * append="ide0=umc8672"... * To set the speed according to the abilities of the hardware there must be a * line like * #define UMC_DRIVE0 11 * in the beginning of the driver, which sets the speed of drive 0 to 11 (there * are some lines present). 0 - 11 are allowed speed values. These values are * the results from the DOS speed test program supplied from UMC. 11 is the * highest speed (about PIO mode 3) */ #define REALLY_SLOW_IO /* some systems can safely undef this */ #include <linux/module.h> #include <linux/config.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/ioport.h> #include <linux/blkdev.h> #include <linux/hdreg.h> #include <linux/ide.h> #include <linux/init.h> #include <asm/io.h> #ifdef CONFIG_BLK_DEV_UMC8672_MODULE # define _IDE_C # include "ide_modes.h" # undef _IDE_C #else # include "ide_modes.h" #endif /* CONFIG_BLK_DEV_UMC8672_MODULE */ /* * Default speeds. These can be changed with "auto-tune" and/or hdparm. */ #define UMC_DRIVE0 1 /* DOS measured drive speeds */ #define UMC_DRIVE1 1 /* 0 to 11 allowed */ #define UMC_DRIVE2 1 /* 11 = Fastest Speed */ #define UMC_DRIVE3 1 /* In case of crash reduce speed */ static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3}; static const u8 pio_to_umc [5] = {0,3,7,10,11}; /* rough guesses */ /* 0 1 2 3 4 5 6 7 8 9 10 11 */ static const u8 speedtab [3][12] = { {0xf, 0xb, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 }, {0x3, 0x2, 0x2, 0x2, 0x2, 0x2, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1 }, {0xff,0xcb,0xc0,0x58,0x36,0x33,0x23,0x22,0x21,0x11,0x10,0x0}}; static void out_umc (char port,char wert) { outb_p(port,0x108); outb_p(wert,0x109); } static inline u8 in_umc (char port) { outb_p(port,0x108); return inb_p(0x109); } static void umc_set_speeds (u8 speeds[]) { int i, tmp; outb_p(0x5A,0x108); /* enable umc */ out_umc (0xd7,(speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4))); out_umc (0xd6,(speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4))); tmp = 0; for (i = 3; i >= 0; i--) { tmp = (tmp << 2) | speedtab[1][speeds[i]]; } out_umc (0xdc,tmp); for (i = 0;i < 4; i++) { out_umc (0xd0+i,speedtab[2][speeds[i]]); out_umc (0xd8+i,speedtab[2][speeds[i]]); } outb_p(0xa5,0x108); /* disable umc */ printk ("umc8672: drive speeds [0 to 11]: %d %d %d %d\n", speeds[0], speeds[1], speeds[2], speeds[3]); } static void tune_umc (ide_drive_t *drive, u8 pio) { unsigned long flags; ide_hwgroup_t *hwgroup = ide_hwifs[HWIF(drive)->index^1].hwgroup; pio = ide_get_best_pio_mode(drive, pio, 4, NULL); printk("%s: setting umc8672 to PIO mode%d (speed %d)\n", drive->name, pio, pio_to_umc[pio]); spin_lock_irqsave(&io_request_lock, flags); if (hwgroup && hwgroup->handler != NULL) { printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n"); } else { current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio]; umc_set_speeds (current_speeds); } spin_unlock_irqrestore(&io_request_lock, flags); } int __init probe_umc8672 (void) { unsigned long flags; local_irq_save(flags); if (!request_region(0x108, 2, "umc8672")) { local_irq_restore(flags); printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n"); return 1; } outb_p(0x5A,0x108); /* enable umc */ if (in_umc (0xd5) != 0xa0) { local_irq_restore(flags); printk(KERN_ERR "umc8672: not found\n"); release_region(0x108, 2); return 1; } outb_p(0xa5,0x108); /* disable umc */ umc_set_speeds (current_speeds); local_irq_restore(flags); ide_hwifs[0].chipset = ide_umc8672; ide_hwifs[1].chipset = ide_umc8672; ide_hwifs[0].tuneproc = &tune_umc; ide_hwifs[1].tuneproc = &tune_umc; ide_hwifs[0].mate = &ide_hwifs[1]; ide_hwifs[1].mate = &ide_hwifs[0]; ide_hwifs[1].channel = 1; #ifndef HWIF_PROBE_CLASSIC_METHOD probe_hwif_init(&ide_hwifs[0]); probe_hwif_init(&ide_hwifs[1]); #endif /* HWIF_PROBE_CLASSIC_METHOD */ return 0; } void __init umc8672_release (void) { unsigned long flags; local_irq_save(flags); if (ide_hwifs[0].chipset != ide_umc8672 && ide_hwifs[1].chipset != ide_umc8672) { local_irq_restore(flags); return; } ide_hwifs[0].chipset = ide_unknown; ide_hwifs[1].chipset = ide_unknown; ide_hwifs[0].tuneproc = NULL; ide_hwifs[1].tuneproc = NULL; ide_hwifs[0].mate = NULL; ide_hwifs[1].mate = NULL; ide_hwifs[0].channel = 0; ide_hwifs[1].channel = 0; outb_p(0xa5,0x108); /* disable umc */ release_region(0x108, 2); local_irq_restore(flags); } #ifndef MODULE /* * init_umc8672: * * called by ide.c when parsing command line */ void __init init_umc8672 (void) { if (probe_umc8672()) printk(KERN_ERR "init_umc8672: umc8672 controller not found.\n"); } #else MODULE_AUTHOR("Wolfram Podien"); MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset"); MODULE_LICENSE("GPL"); int __init umc8672_mod_init(void) { if (probe_umc8672()) return -ENODEV; if (ide_hwifs[0].chipset != ide_umc8672 && ide_hwifs[1].chipset != ide_umc8672) { umc8672_release(); return -ENODEV; } return 0; } module_init(umc8672_mod_init); void __init umc8672_mod_exit(void) { umc8672_release(); } module_exit(umc8672_mod_exit); #endif