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| 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 | |
| 63 | static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3}; |
| 64 | static 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 */ |
| 67 | static 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 | |
| 73 | static void out_umc(char port, char wert) |
| 74 | { |
| 75 | outb_p(port, 0x108); |
| 76 | outb_p(wert, 0x109); |
| 77 | } |
| 78 | |
| 79 | static inline u8 in_umc(char port) |
| 80 | { |
| 81 | outb_p(port, 0x108); |
| 82 | return inb_p(0x109); |
| 83 | } |
| 84 | |
| 85 | static 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 | |
| 107 | static 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 | |
| 127 | static const struct ide_port_ops umc8672_port_ops = { |
| 128 | .set_pio_mode = umc_set_pio_mode, |
| 129 | }; |
| 130 | |
| 131 | static 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 | |
| 139 | static 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 | |
| 163 | static bool probe_umc8672; |
| 164 | |
| 165 | module_param_named(probe, probe_umc8672, bool, 0); |
| 166 | MODULE_PARM_DESC(probe, "probe for UMC8672 chipset"); |
| 167 | |
| 168 | static int __init umc8672_init(void) |
| 169 | { |
| 170 | if (probe_umc8672 == 0) |
| 171 | goto out; |
| 172 | |
| 173 | if (umc8672_probe() == 0) |
| 174 | return 0; |
| 175 | out: |
| 176 | return -ENODEV; |
| 177 | } |
| 178 | |
| 179 | module_init(umc8672_init); |
| 180 | |
| 181 | MODULE_AUTHOR("Wolfram Podien"); |
| 182 | MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset"); |
| 183 | MODULE_LICENSE("GPL"); |
| 184 |
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