849138827c
Legacy IDE VLB host drivers didn't check for "probe" options when compiled as modules, which was obviously wrong as we don't want module to poke at random I/O ports by simply loading it. Fix it by adding "probe" module param to legacy IDE VLB host drivers. v2: * don't obsolete old "ide0=dtc2278/ht6560b/qd65xx/ali14xx/umc8672" IDE driver options yet (per Alan Cox's request) and enhance documentation Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
259 lines
6.5 KiB
C
259 lines
6.5 KiB
C
/*
|
|
* linux/drivers/ide/legacy/ali14xx.c Version 0.03 Feb 09, 1996
|
|
*
|
|
* 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/hdreg.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
/* port addresses for auto-detection */
|
|
#define ALI_NUM_PORTS 4
|
|
static int ports[ALI_NUM_PORTS] __initdata = {0x074, 0x0f4, 0x034, 0x0e4};
|
|
|
|
/* register initialization data */
|
|
typedef struct { u8 reg, data; } RegInitializer;
|
|
|
|
static 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}
|
|
};
|
|
|
|
#define ALI_MAX_PIO 4
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/*
|
|
* Set PIO mode for the specified drive.
|
|
* This function computes timing parameters
|
|
* and sets controller registers accordingly.
|
|
*/
|
|
static void ali14xx_tune_drive (ide_drive_t *drive, u8 pio)
|
|
{
|
|
int driveNum;
|
|
int time1, time2;
|
|
u8 param1, param2, param3, param4;
|
|
unsigned long flags;
|
|
ide_pio_data_t d;
|
|
int bus_speed = system_bus_clock();
|
|
|
|
pio = ide_get_best_pio_mode(drive, pio, ALI_MAX_PIO, &d);
|
|
|
|
/* calculate timing, according to PIO mode */
|
|
time1 = d.cycle_time;
|
|
time2 = ide_pio_timings[pio].active_time;
|
|
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 = (HWIF(drive)->index << 1) + drive->select.b.unit;
|
|
spin_lock_irqsave(&ide_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(&ide_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) {
|
|
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 int __init ali14xx_probe(void)
|
|
{
|
|
ide_hwif_t *hwif, *mate;
|
|
|
|
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;
|
|
}
|
|
|
|
hwif = &ide_hwifs[0];
|
|
mate = &ide_hwifs[1];
|
|
|
|
hwif->chipset = ide_ali14xx;
|
|
hwif->tuneproc = &ali14xx_tune_drive;
|
|
hwif->mate = mate;
|
|
|
|
mate->chipset = ide_ali14xx;
|
|
mate->tuneproc = &ali14xx_tune_drive;
|
|
mate->mate = hwif;
|
|
mate->channel = 1;
|
|
|
|
probe_hwif_init(hwif);
|
|
probe_hwif_init(mate);
|
|
|
|
create_proc_ide_interfaces();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int probe_ali14xx = 0;
|
|
|
|
module_param_named(probe, probe_ali14xx, bool, 0);
|
|
MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets");
|
|
|
|
/* Can be called directly from ide.c. */
|
|
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;
|
|
}
|
|
|
|
#ifdef MODULE
|
|
module_init(ali14xx_init);
|
|
#endif
|
|
|
|
MODULE_AUTHOR("see local file");
|
|
MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets");
|
|
MODULE_LICENSE("GPL");
|