1/* 2 * linux/drivers/ide/legacy/ali14xx.c Version 0.03 Feb 09, 1996 3 * 4 * Copyright (C) 1996 Linus Torvalds & author (see below) 5 */ 6 7/* 8 * ALI M14xx chipset EIDE controller 9 * 10 * Works for ALI M1439/1443/1445/1487/1489 chipsets. 11 * 12 * Adapted from code developed by derekn@vw.ece.cmu.edu. -ml 13 * Derek's notes follow: 14 * 15 * I think the code should be pretty understandable, 16 * but I'll be happy to (try to) answer questions. 17 * 18 * The critical part is in the setupDrive function. The initRegisters 19 * function doesn't seem to be necessary, but the DOS driver does it, so 20 * I threw it in. 21 * 22 * I've only tested this on my system, which only has one disk. I posted 23 * it to comp.sys.linux.hardware, so maybe some other people will try it 24 * out. 25 * 26 * Derek Noonburg (derekn@ece.cmu.edu) 27 * 95-sep-26 28 * 29 * Update 96-jul-13: 30 * 31 * I've since upgraded to two disks and a CD-ROM, with no trouble, and 32 * I've also heard from several others who have used it successfully. 33 * This driver appears to work with both the 1443/1445 and the 1487/1489 34 * chipsets. I've added support for PIO mode 4 for the 1487. This 35 * seems to work just fine on the 1443 also, although I'm not sure it's 36 * advertised as supporting mode 4. (I've been running a WDC AC21200 in 37 * mode 4 for a while now with no trouble.) -Derek 38 */ 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/hdreg.h> 49#include <linux/ide.h> 50#include <linux/init.h> 51 52#include <asm/io.h> 53 54/* port addresses for auto-detection */ 55#define ALI_NUM_PORTS 4 56static int ports[ALI_NUM_PORTS] __initdata = {0x074, 0x0f4, 0x034, 0x0e4}; 57 58/* register initialization data */ 59typedef struct { u8 reg, data; } RegInitializer; 60 61static RegInitializer initData[] __initdata = { 62 {0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00}, 63 {0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f}, 64 {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00}, 65 {0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00}, 66 {0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00}, 67 {0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff}, 68 {0x35, 0x03}, {0x00, 0x00} 69}; 70 71#define ALI_MAX_PIO 4 72 73/* timing parameter registers for each drive */ 74static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = { 75 {0x03, 0x26, 0x04, 0x27}, /* drive 0 */ 76 {0x05, 0x28, 0x06, 0x29}, /* drive 1 */ 77 {0x2b, 0x30, 0x2c, 0x31}, /* drive 2 */ 78 {0x2d, 0x32, 0x2e, 0x33}, /* drive 3 */ 79}; 80 81static int basePort; /* base port address */ 82static int regPort; /* port for register number */ 83static int dataPort; /* port for register data */ 84static u8 regOn; /* output to base port to access registers */ 85static u8 regOff; /* output to base port to close registers */ 86 87/*------------------------------------------------------------------------*/ 88 89/* 90 * Read a controller register. 91 */ 92static inline u8 inReg (u8 reg) 93{ 94 outb_p(reg, regPort); 95 return inb(dataPort); 96} 97 98/* 99 * Write a controller register. 100 */ 101static void outReg (u8 data, u8 reg) 102{ 103 outb_p(reg, regPort); 104 outb_p(data, dataPort); 105} 106 107/* 108 * Set PIO mode for the specified drive. 109 * This function computes timing parameters 110 * and sets controller registers accordingly. 111 */ 112static void ali14xx_tune_drive (ide_drive_t *drive, u8 pio) 113{ 114 int driveNum; 115 int time1, time2; 116 u8 param1, param2, param3, param4; 117 unsigned long flags; 118 ide_pio_data_t d; 119 int bus_speed = system_bus_clock(); 120 121 pio = ide_get_best_pio_mode(drive, pio, ALI_MAX_PIO, &d); 122 123 /* calculate timing, according to PIO mode */ 124 time1 = d.cycle_time; 125 time2 = ide_pio_timings[pio].active_time; 126 param3 = param1 = (time2 * bus_speed + 999) / 1000; 127 param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1; 128 if (pio < 3) { 129 param3 += 8; 130 param4 += 8; 131 } 132 printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n", 133 drive->name, pio, time1, time2, param1, param2, param3, param4); 134 135 /* stuff timing parameters into controller registers */ 136 driveNum = (HWIF(drive)->index << 1) + drive->select.b.unit; 137 spin_lock_irqsave(&ide_lock, flags); 138 outb_p(regOn, basePort); 139 outReg(param1, regTab[driveNum].reg1); 140 outReg(param2, regTab[driveNum].reg2); 141 outReg(param3, regTab[driveNum].reg3); 142 outReg(param4, regTab[driveNum].reg4); 143 outb_p(regOff, basePort); 144 spin_unlock_irqrestore(&ide_lock, flags); 145} 146 147/* 148 * Auto-detect the IDE controller port. 149 */ 150static int __init findPort (void) 151{ 152 int i; 153 u8 t; 154 unsigned long flags; 155 156 local_irq_save(flags); 157 for (i = 0; i < ALI_NUM_PORTS; ++i) { 158 basePort = ports[i]; 159 regOff = inb(basePort); 160 for (regOn = 0x30; regOn <= 0x33; ++regOn) { 161 outb_p(regOn, basePort); 162 if (inb(basePort) == regOn) { 163 regPort = basePort + 4; 164 dataPort = basePort + 8; 165 t = inReg(0) & 0xf0; 166 outb_p(regOff, basePort); 167 local_irq_restore(flags); 168 if (t != 0x50) 169 return 0; 170 return 1; /* success */ 171 } 172 } 173 outb_p(regOff, basePort); 174 } 175 local_irq_restore(flags); 176 return 0; 177} 178 179/* 180 * Initialize controller registers with default values. 181 */ 182static int __init initRegisters (void) { 183 RegInitializer *p; 184 u8 t; 185 unsigned long flags; 186 187 local_irq_save(flags); 188 outb_p(regOn, basePort); 189 for (p = initData; p->reg != 0; ++p) 190 outReg(p->data, p->reg); 191 outb_p(0x01, regPort); 192 t = inb(regPort) & 0x01; 193 outb_p(regOff, basePort); 194 local_irq_restore(flags); 195 return t; 196} 197 198static int __init ali14xx_probe(void) 199{ 200 ide_hwif_t *hwif, *mate; 201 202 printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n", 203 basePort, regOn); 204 205 /* initialize controller registers */ 206 if (!initRegisters()) { 207 printk(KERN_ERR "ali14xx: Chip initialization failed.\n"); 208 return 1; 209 } 210 211 hwif = &ide_hwifs[0]; 212 mate = &ide_hwifs[1]; 213 214 hwif->chipset = ide_ali14xx; 215 hwif->tuneproc = &ali14xx_tune_drive; 216 hwif->mate = mate; 217 218 mate->chipset = ide_ali14xx; 219 mate->tuneproc = &ali14xx_tune_drive; 220 mate->mate = hwif; 221 mate->channel = 1; 222 223 probe_hwif_init(hwif); 224 probe_hwif_init(mate); 225 226 ide_proc_register_port(hwif); 227 ide_proc_register_port(mate); 228 229 return 0; 230} 231 232int probe_ali14xx = 0; 233 234module_param_named(probe, probe_ali14xx, bool, 0); 235MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets"); 236 237/* Can be called directly from ide.c. */ 238int __init ali14xx_init(void) 239{ 240 if (probe_ali14xx == 0) 241 goto out; 242 243 /* auto-detect IDE controller port */ 244 if (findPort()) { 245 if (ali14xx_probe()) 246 return -ENODEV; 247 return 0; 248 } 249 printk(KERN_ERR "ali14xx: not found.\n"); 250out: 251 return -ENODEV; 252} 253 254#ifdef MODULE 255module_init(ali14xx_init); 256#endif 257 258MODULE_AUTHOR("see local file"); 259MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets"); 260MODULE_LICENSE("GPL"); 261