+++ /dev/null
-/*
- * 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] __initdata =
- { 0x074, 0x0f4, 0x034, 0x0e4 };
-
-/* register initialization data */
-typedef struct { u8 reg, data; } RegInitializer;
-
-static const RegInitializer initData[] __initdata = {
- {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_drive_t *drive, const u8 pio)
-{
- int driveNum;
- int time1, time2;
- u8 param1, param2, param3, param4;
- unsigned long flags;
- int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
- 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 int 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");
git.openpandora.org / pandora-kernel.git / blobdiff