/* * Copyright (C) 1996 Linus Torvalds & author (see below) */ /* * ALI M14xx chipset EIDE controller * * Works for ALI M1439/1443/1445/1487/1489 chipsets. * * Adapted from code developed by derekn@vw.ece.cmu.edu. -ml * Derek's notes follow: * * I think the code should be pretty understandable, * but I'll be happy to (try to) answer questions. * * The critical part is in the setupDrive function. The initRegisters * function doesn't seem to be necessary, but the DOS driver does it, so * I threw it in. * * I've only tested this on my system, which only has one disk. I posted * it to comp.sys.linux.hardware, so maybe some other people will try it * out. * * Derek Noonburg (derekn@ece.cmu.edu) * 95-sep-26 * * Update 96-jul-13: * * I've since upgraded to two disks and a CD-ROM, with no trouble, and * I've also heard from several others who have used it successfully. * This driver appears to work with both the 1443/1445 and the 1487/1489 * chipsets. I've added support for PIO mode 4 for the 1487. This * seems to work just fine on the 1443 also, although I'm not sure it's * advertised as supporting mode 4. (I've been running a WDC AC21200 in * mode 4 for a while now with no trouble.) -Derek */ #include <linux/module.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/ide.h> #include <linux/init.h> #include <asm/io.h> #define DRV_NAME "ali14xx" /* port addresses for auto-detection */ #define ALI_NUM_PORTS 4 static const int ports[ALI_NUM_PORTS] __initconst = { 0x074, 0x0f4, 0x034, 0x0e4 }; /* register initialization data */ typedef struct { u8 reg, data; } RegInitializer; static const RegInitializer initData[] __initconst = { {0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00}, {0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f}, {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00}, {0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00}, {0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff}, {0x35, 0x03}, {0x00, 0x00} }; /* timing parameter registers for each drive */ static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = { {0x03, 0x26, 0x04, 0x27}, /* drive 0 */ {0x05, 0x28, 0x06, 0x29}, /* drive 1 */ {0x2b, 0x30, 0x2c, 0x31}, /* drive 2 */ {0x2d, 0x32, 0x2e, 0x33}, /* drive 3 */ }; static int basePort; /* base port address */ static int regPort; /* port for register number */ static int dataPort; /* port for register data */ static u8 regOn; /* output to base port to access registers */ static u8 regOff; /* output to base port to close registers */ /*------------------------------------------------------------------------*/ /* * Read a controller register. */ static inline u8 inReg(u8 reg) { outb_p(reg, regPort); return inb(dataPort); } /* * Write a controller register. */ static void outReg(u8 data, u8 reg) { outb_p(reg, regPort); outb_p(data, dataPort); } static DEFINE_SPINLOCK(ali14xx_lock); /* * Set PIO mode for the specified drive. * This function computes timing parameters * and sets controller registers accordingly. */ static void ali14xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) { int driveNum; int time1, time2; u8 param1, param2, param3, param4; unsigned long flags; int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50; const u8 pio = drive->pio_mode - XFER_PIO_0; struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); /* calculate timing, according to PIO mode */ time1 = ide_pio_cycle_time(drive, pio); time2 = t->active; param3 = param1 = (time2 * bus_speed + 999) / 1000; param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1; if (pio < 3) { param3 += 8; param4 += 8; } printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n", drive->name, pio, time1, time2, param1, param2, param3, param4); /* stuff timing parameters into controller registers */ driveNum = (drive->hwif->index << 1) + (drive->dn & 1); spin_lock_irqsave(&ali14xx_lock, flags); outb_p(regOn, basePort); outReg(param1, regTab[driveNum].reg1); outReg(param2, regTab[driveNum].reg2); outReg(param3, regTab[driveNum].reg3); outReg(param4, regTab[driveNum].reg4); outb_p(regOff, basePort); spin_unlock_irqrestore(&ali14xx_lock, flags); } /* * Auto-detect the IDE controller port. */ static int __init findPort(void) { int i; u8 t; unsigned long flags; local_irq_save(flags); for (i = 0; i < ALI_NUM_PORTS; ++i) { basePort = ports[i]; regOff = inb(basePort); for (regOn = 0x30; regOn <= 0x33; ++regOn) { outb_p(regOn, basePort); if (inb(basePort) == regOn) { regPort = basePort + 4; dataPort = basePort + 8; t = inReg(0) & 0xf0; outb_p(regOff, basePort); local_irq_restore(flags); if (t != 0x50) return 0; return 1; /* success */ } } outb_p(regOff, basePort); } local_irq_restore(flags); return 0; } /* * Initialize controller registers with default values. */ static int __init initRegisters(void) { const RegInitializer *p; u8 t; unsigned long flags; local_irq_save(flags); outb_p(regOn, basePort); for (p = initData; p->reg != 0; ++p) outReg(p->data, p->reg); outb_p(0x01, regPort); t = inb(regPort) & 0x01; outb_p(regOff, basePort); local_irq_restore(flags); return t; } static const struct ide_port_ops ali14xx_port_ops = { .set_pio_mode = ali14xx_set_pio_mode, }; static const struct ide_port_info ali14xx_port_info = { .name = DRV_NAME, .chipset = ide_ali14xx, .port_ops = &ali14xx_port_ops, .host_flags = IDE_HFLAG_NO_DMA, .pio_mask = ATA_PIO4, }; static int __init ali14xx_probe(void) { printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n", basePort, regOn); /* initialize controller registers */ if (!initRegisters()) { printk(KERN_ERR "ali14xx: Chip initialization failed.\n"); return 1; } return ide_legacy_device_add(&ali14xx_port_info, 0); } static bool probe_ali14xx; module_param_named(probe, probe_ali14xx, bool, 0); MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets"); static int __init ali14xx_init(void) { if (probe_ali14xx == 0) goto out; /* auto-detect IDE controller port */ if (findPort()) { if (ali14xx_probe()) return -ENODEV; return 0; } printk(KERN_ERR "ali14xx: not found.\n"); out: return -ENODEV; } module_init(ali14xx_init); MODULE_AUTHOR("see local file"); MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets"); MODULE_LICENSE("GPL");