Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 1996 Linus Torvalds & author (see below) |
| 3 | */ |
| 4 | |
| 5 | /* |
| 6 | * ALI M14xx chipset EIDE controller |
| 7 | * |
| 8 | * Works for ALI M1439/1443/1445/1487/1489 chipsets. |
| 9 | * |
| 10 | * Adapted from code developed by derekn@vw.ece.cmu.edu. -ml |
| 11 | * Derek's notes follow: |
| 12 | * |
| 13 | * I think the code should be pretty understandable, |
| 14 | * but I'll be happy to (try to) answer questions. |
| 15 | * |
| 16 | * The critical part is in the setupDrive function. The initRegisters |
| 17 | * function doesn't seem to be necessary, but the DOS driver does it, so |
| 18 | * I threw it in. |
| 19 | * |
| 20 | * I've only tested this on my system, which only has one disk. I posted |
| 21 | * it to comp.sys.linux.hardware, so maybe some other people will try it |
| 22 | * out. |
| 23 | * |
| 24 | * Derek Noonburg (derekn@ece.cmu.edu) |
| 25 | * 95-sep-26 |
| 26 | * |
| 27 | * Update 96-jul-13: |
| 28 | * |
| 29 | * I've since upgraded to two disks and a CD-ROM, with no trouble, and |
| 30 | * I've also heard from several others who have used it successfully. |
| 31 | * This driver appears to work with both the 1443/1445 and the 1487/1489 |
| 32 | * chipsets. I've added support for PIO mode 4 for the 1487. This |
| 33 | * seems to work just fine on the 1443 also, although I'm not sure it's |
| 34 | * advertised as supporting mode 4. (I've been running a WDC AC21200 in |
| 35 | * mode 4 for a while now with no trouble.) -Derek |
| 36 | */ |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/types.h> |
| 40 | #include <linux/kernel.h> |
| 41 | #include <linux/delay.h> |
| 42 | #include <linux/timer.h> |
| 43 | #include <linux/mm.h> |
| 44 | #include <linux/ioport.h> |
| 45 | #include <linux/blkdev.h> |
| 46 | #include <linux/hdreg.h> |
| 47 | #include <linux/ide.h> |
| 48 | #include <linux/init.h> |
| 49 | |
| 50 | #include <asm/io.h> |
| 51 | |
| 52 | /* port addresses for auto-detection */ |
| 53 | #define ALI_NUM_PORTS 4 |
Bartlomiej Zolnierkiewicz | 498f26b | 2007-11-27 21:35:57 +0100 | [diff] [blame] | 54 | static const int ports[ALI_NUM_PORTS] __initdata = |
| 55 | { 0x074, 0x0f4, 0x034, 0x0e4 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | /* register initialization data */ |
| 58 | typedef struct { u8 reg, data; } RegInitializer; |
| 59 | |
Bartlomiej Zolnierkiewicz | 498f26b | 2007-11-27 21:35:57 +0100 | [diff] [blame] | 60 | static const RegInitializer initData[] __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | {0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00}, |
| 62 | {0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f}, |
| 63 | {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00}, |
| 64 | {0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00}, |
| 65 | {0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00}, |
| 66 | {0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff}, |
| 67 | {0x35, 0x03}, {0x00, 0x00} |
| 68 | }; |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* timing parameter registers for each drive */ |
| 71 | static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = { |
| 72 | {0x03, 0x26, 0x04, 0x27}, /* drive 0 */ |
| 73 | {0x05, 0x28, 0x06, 0x29}, /* drive 1 */ |
| 74 | {0x2b, 0x30, 0x2c, 0x31}, /* drive 2 */ |
| 75 | {0x2d, 0x32, 0x2e, 0x33}, /* drive 3 */ |
| 76 | }; |
| 77 | |
| 78 | static int basePort; /* base port address */ |
| 79 | static int regPort; /* port for register number */ |
| 80 | static int dataPort; /* port for register data */ |
| 81 | static u8 regOn; /* output to base port to access registers */ |
| 82 | static u8 regOff; /* output to base port to close registers */ |
| 83 | |
| 84 | /*------------------------------------------------------------------------*/ |
| 85 | |
| 86 | /* |
| 87 | * Read a controller register. |
| 88 | */ |
| 89 | static inline u8 inReg (u8 reg) |
| 90 | { |
| 91 | outb_p(reg, regPort); |
| 92 | return inb(dataPort); |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * Write a controller register. |
| 97 | */ |
| 98 | static void outReg (u8 data, u8 reg) |
| 99 | { |
| 100 | outb_p(reg, regPort); |
| 101 | outb_p(data, dataPort); |
| 102 | } |
| 103 | |
Bartlomiej Zolnierkiewicz | 2047e15 | 2007-10-20 00:32:35 +0200 | [diff] [blame] | 104 | static DEFINE_SPINLOCK(ali14xx_lock); |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | /* |
| 107 | * Set PIO mode for the specified drive. |
| 108 | * This function computes timing parameters |
| 109 | * and sets controller registers accordingly. |
| 110 | */ |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 111 | static void ali14xx_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
| 113 | int driveNum; |
| 114 | int time1, time2; |
| 115 | u8 param1, param2, param3, param4; |
| 116 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | int bus_speed = system_bus_clock(); |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | /* calculate timing, according to PIO mode */ |
Bartlomiej Zolnierkiewicz | 7dd0008 | 2007-07-20 01:11:56 +0200 | [diff] [blame] | 120 | time1 = ide_pio_cycle_time(drive, pio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | time2 = ide_pio_timings[pio].active_time; |
| 122 | param3 = param1 = (time2 * bus_speed + 999) / 1000; |
| 123 | param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1; |
| 124 | if (pio < 3) { |
| 125 | param3 += 8; |
| 126 | param4 += 8; |
| 127 | } |
| 128 | printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n", |
| 129 | drive->name, pio, time1, time2, param1, param2, param3, param4); |
| 130 | |
| 131 | /* stuff timing parameters into controller registers */ |
| 132 | driveNum = (HWIF(drive)->index << 1) + drive->select.b.unit; |
Bartlomiej Zolnierkiewicz | 2047e15 | 2007-10-20 00:32:35 +0200 | [diff] [blame] | 133 | spin_lock_irqsave(&ali14xx_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | outb_p(regOn, basePort); |
| 135 | outReg(param1, regTab[driveNum].reg1); |
| 136 | outReg(param2, regTab[driveNum].reg2); |
| 137 | outReg(param3, regTab[driveNum].reg3); |
| 138 | outReg(param4, regTab[driveNum].reg4); |
| 139 | outb_p(regOff, basePort); |
Bartlomiej Zolnierkiewicz | 2047e15 | 2007-10-20 00:32:35 +0200 | [diff] [blame] | 140 | spin_unlock_irqrestore(&ali14xx_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | /* |
| 144 | * Auto-detect the IDE controller port. |
| 145 | */ |
| 146 | static int __init findPort (void) |
| 147 | { |
| 148 | int i; |
| 149 | u8 t; |
| 150 | unsigned long flags; |
| 151 | |
| 152 | local_irq_save(flags); |
| 153 | for (i = 0; i < ALI_NUM_PORTS; ++i) { |
| 154 | basePort = ports[i]; |
| 155 | regOff = inb(basePort); |
| 156 | for (regOn = 0x30; regOn <= 0x33; ++regOn) { |
| 157 | outb_p(regOn, basePort); |
| 158 | if (inb(basePort) == regOn) { |
| 159 | regPort = basePort + 4; |
| 160 | dataPort = basePort + 8; |
| 161 | t = inReg(0) & 0xf0; |
| 162 | outb_p(regOff, basePort); |
| 163 | local_irq_restore(flags); |
| 164 | if (t != 0x50) |
| 165 | return 0; |
| 166 | return 1; /* success */ |
| 167 | } |
| 168 | } |
| 169 | outb_p(regOff, basePort); |
| 170 | } |
| 171 | local_irq_restore(flags); |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Initialize controller registers with default values. |
| 177 | */ |
| 178 | static int __init initRegisters (void) { |
Bartlomiej Zolnierkiewicz | 498f26b | 2007-11-27 21:35:57 +0100 | [diff] [blame] | 179 | const RegInitializer *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | u8 t; |
| 181 | unsigned long flags; |
| 182 | |
| 183 | local_irq_save(flags); |
| 184 | outb_p(regOn, basePort); |
| 185 | for (p = initData; p->reg != 0; ++p) |
| 186 | outReg(p->data, p->reg); |
| 187 | outb_p(0x01, regPort); |
| 188 | t = inb(regPort) & 0x01; |
| 189 | outb_p(regOff, basePort); |
| 190 | local_irq_restore(flags); |
| 191 | return t; |
| 192 | } |
| 193 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 194 | static const struct ide_port_info ali14xx_port_info = { |
| 195 | .chipset = ide_ali14xx, |
| 196 | .host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE, |
| 197 | .pio_mask = ATA_PIO4, |
| 198 | }; |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | static int __init ali14xx_probe(void) |
| 201 | { |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 202 | static u8 idx[4] = { 0, 1, 0xff, 0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n", |
| 205 | basePort, regOn); |
| 206 | |
| 207 | /* initialize controller registers */ |
| 208 | if (!initRegisters()) { |
| 209 | printk(KERN_ERR "ali14xx: Chip initialization failed.\n"); |
| 210 | return 1; |
| 211 | } |
| 212 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 213 | ide_hwifs[0].set_pio_mode = &ali14xx_set_pio_mode; |
| 214 | ide_hwifs[1].set_pio_mode = &ali14xx_set_pio_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Bartlomiej Zolnierkiewicz | c413b9b | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 216 | ide_device_add(idx, &ali14xx_port_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
Bartlomiej Zolnierkiewicz | 8491388 | 2007-03-03 17:48:55 +0100 | [diff] [blame] | 221 | int probe_ali14xx = 0; |
| 222 | |
| 223 | module_param_named(probe, probe_ali14xx, bool, 0); |
| 224 | MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets"); |
| 225 | |
Bartlomiej Zolnierkiewicz | ade2daf | 2008-01-26 20:13:07 +0100 | [diff] [blame] | 226 | static int __init ali14xx_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
Bartlomiej Zolnierkiewicz | 8491388 | 2007-03-03 17:48:55 +0100 | [diff] [blame] | 228 | if (probe_ali14xx == 0) |
| 229 | goto out; |
| 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | /* auto-detect IDE controller port */ |
| 232 | if (findPort()) { |
| 233 | if (ali14xx_probe()) |
| 234 | return -ENODEV; |
| 235 | return 0; |
| 236 | } |
| 237 | printk(KERN_ERR "ali14xx: not found.\n"); |
Bartlomiej Zolnierkiewicz | 8491388 | 2007-03-03 17:48:55 +0100 | [diff] [blame] | 238 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | return -ENODEV; |
| 240 | } |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | module_init(ali14xx_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | MODULE_AUTHOR("see local file"); |
| 245 | MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets"); |
| 246 | MODULE_LICENSE("GPL"); |