1/* 2 * Copyright (C) 1995-1996 Linus Torvalds & author (see below) 3 */ 4 5/* 6 * Principal Author/Maintainer: PODIEN@hml2.atlas.de (Wolfram Podien) 7 * 8 * This file provides support for the advanced features 9 * of the UMC 8672 IDE interface. 10 * 11 * Version 0.01 Initial version, hacked out of ide.c, 12 * and #include'd rather than compiled separately. 13 * This will get cleaned up in a subsequent release. 14 * 15 * Version 0.02 now configs/compiles separate from ide.c -ml 16 * Version 0.03 enhanced auto-tune, fix display bug 17 * Version 0.05 replace sti() with restore_flags() -ml 18 * add detection of possible race condition -ml 19 */ 20 21/* 22 * VLB Controller Support from 23 * Wolfram Podien 24 * Rohoefe 3 25 * D28832 Achim 26 * Germany 27 * 28 * To enable UMC8672 support there must a lilo line like 29 * append="ide0=umc8672"... 30 * To set the speed according to the abilities of the hardware there must be a 31 * line like 32 * #define UMC_DRIVE0 11 33 * in the beginning of the driver, which sets the speed of drive 0 to 11 (there 34 * are some lines present). 0 - 11 are allowed speed values. These values are 35 * the results from the DOS speed test program supplied from UMC. 11 is the 36 * highest speed (about PIO mode 3) 37 */ 38#define REALLY_SLOW_IO /* some systems can safely undef this */ 39 40#include <linux/module.h> 41#include <linux/types.h> 42#include <linux/kernel.h> 43#include <linux/delay.h> 44#include <linux/timer.h> 45#include <linux/mm.h> 46#include <linux/ioport.h> 47#include <linux/blkdev.h> 48#include <linux/ide.h> 49#include <linux/init.h> 50 51#include <asm/io.h> 52 53#define DRV_NAME "umc8672" 54 55/* 56 * Default speeds. These can be changed with "auto-tune" and/or hdparm. 57 */ 58#define UMC_DRIVE0 1 /* DOS measured drive speeds */ 59#define UMC_DRIVE1 1 /* 0 to 11 allowed */ 60#define UMC_DRIVE2 1 /* 11 = Fastest Speed */ 61#define UMC_DRIVE3 1 /* In case of crash reduce speed */ 62 63static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3}; 64static const u8 pio_to_umc [5] = {0, 3, 7, 10, 11}; /* rough guesses */ 65 66/* 0 1 2 3 4 5 6 7 8 9 10 11 */ 67static const u8 speedtab [3][12] = { 68 {0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1}, 69 {0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1}, 70 {0xff, 0xcb, 0xc0, 0x58, 0x36, 0x33, 0x23, 0x22, 0x21, 0x11, 0x10, 0x0} 71}; 72 73static void out_umc(char port, char wert) 74{ 75 outb_p(port, 0x108); 76 outb_p(wert, 0x109); 77} 78 79static inline u8 in_umc(char port) 80{ 81 outb_p(port, 0x108); 82 return inb_p(0x109); 83} 84 85static void umc_set_speeds(u8 speeds[]) 86{ 87 int i, tmp; 88 89 outb_p(0x5A, 0x108); /* enable umc */ 90 91 out_umc(0xd7, (speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4))); 92 out_umc(0xd6, (speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4))); 93 tmp = 0; 94 for (i = 3; i >= 0; i--) 95 tmp = (tmp << 2) | speedtab[1][speeds[i]]; 96 out_umc(0xdc, tmp); 97 for (i = 0; i < 4; i++) { 98 out_umc(0xd0 + i, speedtab[2][speeds[i]]); 99 out_umc(0xd8 + i, speedtab[2][speeds[i]]); 100 } 101 outb_p(0xa5, 0x108); /* disable umc */ 102 103 printk("umc8672: drive speeds [0 to 11]: %d %d %d %d\n", 104 speeds[0], speeds[1], speeds[2], speeds[3]); 105} 106 107static void umc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) 108{ 109 ide_hwif_t *mate = hwif->mate; 110 unsigned long uninitialized_var(flags); 111 const u8 pio = drive->pio_mode - XFER_PIO_0; 112 113 printk("%s: setting umc8672 to PIO mode%d (speed %d)\n", 114 drive->name, pio, pio_to_umc[pio]); 115 if (mate) 116 spin_lock_irqsave(&mate->lock, flags); 117 if (mate && mate->handler) { 118 printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n"); 119 } else { 120 current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio]; 121 umc_set_speeds(current_speeds); 122 } 123 if (mate) 124 spin_unlock_irqrestore(&mate->lock, flags); 125} 126 127static const struct ide_port_ops umc8672_port_ops = { 128 .set_pio_mode = umc_set_pio_mode, 129}; 130 131static const struct ide_port_info umc8672_port_info __initdata = { 132 .name = DRV_NAME, 133 .chipset = ide_umc8672, 134 .port_ops = &umc8672_port_ops, 135 .host_flags = IDE_HFLAG_NO_DMA, 136 .pio_mask = ATA_PIO4, 137}; 138 139static int __init umc8672_probe(void) 140{ 141 unsigned long flags; 142 143 if (!request_region(0x108, 2, "umc8672")) { 144 printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n"); 145 return 1; 146 } 147 local_irq_save(flags); 148 outb_p(0x5A, 0x108); /* enable umc */ 149 if (in_umc (0xd5) != 0xa0) { 150 local_irq_restore(flags); 151 printk(KERN_ERR "umc8672: not found\n"); 152 release_region(0x108, 2); 153 return 1; 154 } 155 outb_p(0xa5, 0x108); /* disable umc */ 156 157 umc_set_speeds(current_speeds); 158 local_irq_restore(flags); 159 160 return ide_legacy_device_add(&umc8672_port_info, 0); 161} 162 163static int probe_umc8672; 164 165module_param_named(probe, probe_umc8672, bool, 0); 166MODULE_PARM_DESC(probe, "probe for UMC8672 chipset"); 167 168static int __init umc8672_init(void) 169{ 170 if (probe_umc8672 == 0) 171 goto out; 172 173 if (umc8672_probe() == 0) 174 return 0; 175out: 176 return -ENODEV; 177} 178 179module_init(umc8672_init); 180 181MODULE_AUTHOR("Wolfram Podien"); 182MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset"); 183MODULE_LICENSE("GPL"); 184