forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
250 lines
6.5 KiB
250 lines
6.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* 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 [email protected]. -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 ([email protected]) |
|
* 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");
|
|
|