via82cxxx.c

em85xx的大硬盘修正代码包

/*
 * $Id: via82cxxx.c,v 3.29 2001/09/10 10:06:00 vojtech Exp $
 *
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *	Michel Aubry
 *	Jeff Garzik
 *	Andre Hedrick
 *
 *  Sponsored by SuSE
 */

/*
 * VIA IDE driver for Linux. Supports
 *
 *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
 *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233
 *
 * southbridges, which can be found in
 *
 *  VIA Apollo Master, VP, VP2, VP2/97, VP3, VPX, VPX/97, MVP3, MVP4, P6, Pro,
 *    ProII, ProPlus, Pro133, Pro133+, Pro133A, Pro133A Dual, Pro133T, Pro133Z,
 *    PLE133, PLE133T, Pro266, Pro266T, ProP4X266, PM601, PM133, PN133, PL133T,
 *    PX266, PM266, KX133, KT133, KT133A, KLE133, KT266, KX266, KM133, KM133A,
 *    KL133, KN133, KM266
 *  PC-Chips VXPro, VXPro+, VXTwo, TXPro-III, TXPro-AGP, AGPPro, ViaGra, BXToo,
 *    BXTel, BXpert
 *  AMD 640, 640 AGP, 750 IronGate, 760, 760MP
 *  ETEQ 6618, 6628, 6629, 6638
 *  Micron Samurai
 *
 * chipsets. Supports
 *
 *   PIO 0-5, MWDMA 0-2, SWDMA 0-2 and UDMA 0-5
 *
 * (this includes UDMA33, 66 and 100) modes. UDMA66 and higher modes are
 * autoenabled only in case the BIOS has detected a 80 wire cable. To ignore
 * the BIOS data and assume the cable is present, use 'ide0=ata66' or
 * 'ide1=ata66' on the kernel command line.
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <[e-mail]>, or by paper mail:
 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <asm/io.h>

#include "ide-timing.h"

#define VIA_IDE_ENABLE		0x40
#define VIA_IDE_CONFIG		0x41
#define VIA_FIFO_CONFIG		0x43
#define VIA_MISC_1		0x44
#define VIA_MISC_2		0x45
#define VIA_MISC_3		0x46
#define VIA_DRIVE_TIMING	0x48
#define VIA_8BIT_TIMING		0x4e
#define VIA_ADDRESS_SETUP	0x4c
#define VIA_UDMA_TIMING		0x50

#define VIA_UDMA		0x007
#define VIA_UDMA_NONE		0x000
#define VIA_UDMA_33		0x001
#define VIA_UDMA_66		0x002
#define VIA_UDMA_100		0x003
#define VIA_BAD_PREQ		0x010	/* Crashes if PREQ# till DDACK# set */
#define VIA_BAD_CLK66		0x020	/* 66 MHz clock doesn't work correctly */
#define VIA_SET_FIFO		0x040	/* Needs to have FIFO split set */
#define VIA_NO_UNMASK		0x080	/* Doesn't work with IRQ unmasking on */

/*
 * VIA SouthBridge chips.
 */

static struct via_isa_bridge {
	char *name;
	unsigned short id;
	unsigned char rev_min;
	unsigned char rev_max;
	unsigned short flags;
} via_isa_bridges[] = {
#ifdef FUTURE_BRIDGES
	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, VIA_UDMA_100 },
	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, VIA_UDMA_100 },
	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C,    0x00, 0x2f, VIA_UDMA_100 },
#endif
	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, VIA_UDMA_100 },
	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, VIA_UDMA_100 },
	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, VIA_UDMA_100 },
	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, VIA_UDMA_66 },
	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, VIA_UDMA_66 },
	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO },
	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO },
	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK },
	{ NULL }
};

static struct via_isa_bridge *via_config;
static unsigned char via_enabled;
static unsigned int via_80w;
static unsigned int via_clock;
static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100" };

/*
 * VIA /proc entry.
 */

#ifdef CONFIG_PROC_FS

#include <linux/stat.h>
#include <linux/proc_fs.h>

int via_proc, via_base;
static struct pci_dev *bmide_dev, *isa_dev;
extern int (*via_display_info)(char *, char **, off_t, int); /* ide-proc.c */

static char *via_control3[] = { "No limit", "64", "128", "192" };

#define via_print(format, arg...) p += sprintf(p, format "\n" , ## arg)
#define via_print_drive(name, format, arg...)\
	p += sprintf(p, name); for (i = 0; i < 4; i++) p += sprintf(p, format, ## arg); p += sprintf(p, "\n");

static int via_get_info(char *buffer, char **addr, off_t offset, int count)
{
	short speed[4], cycle[4], setup[4], active[4], recover[4], den[4],
		 uen[4], udma[4], umul[4], active8b[4], recover8b[4];
	struct pci_dev *dev = bmide_dev;
	unsigned int v, u, i;
	unsigned short c, w;
	unsigned char t, x;
	char *p = buffer;

	via_print("----------VIA BusMastering IDE Configuration----------------");

	via_print("Driver Version:                     3.29");
	via_print("South Bridge:                       VIA %s", via_config->name);

	pci_read_config_byte(isa_dev, PCI_REVISION_ID, &t);
	pci_read_config_byte(dev, PCI_REVISION_ID, &x);
	via_print("Revision:                           ISA %#x IDE %#x", t, x);
	via_print("Highest DMA rate:                   %s", via_dma[via_config->flags & VIA_UDMA]);

	via_print("BM-DMA base:                        %#x", via_base);
	via_print("PCI clock:                          %dMHz", via_clock);

	pci_read_config_byte(dev, VIA_MISC_1, &t);
	via_print("Master Read  Cycle IRDY:            %dws", (t & 64) >> 6);
	via_print("Master Write Cycle IRDY:            %dws", (t & 32) >> 5);
	via_print("BM IDE Status Register Read Retry:  %s", (t & 8) ? "yes" : "no");

	pci_read_config_byte(dev, VIA_MISC_3, &t);
	via_print("Max DRDY Pulse Width:               %s%s", via_control3[(t & 0x03)], (t & 0x03) ? " PCI clocks" : "");

	via_print("-----------------------Primary IDE-------Secondary IDE------");
	via_print("Read DMA FIFO flush:   %10s%20s", (t & 0x80) ? "yes" : "no", (t & 0x40) ? "yes" : "no");
	via_print("End Sector FIFO flush: %10s%20s", (t & 0x20) ? "yes" : "no", (t & 0x10) ? "yes" : "no");

	pci_read_config_byte(dev, VIA_IDE_CONFIG, &t);
	via_print("Prefetch Buffer:       %10s%20s", (t & 0x80) ? "yes" : "no", (t & 0x20) ? "yes" : "no");
	via_print("Post Write Buffer:     %10s%20s", (t & 0x40) ? "yes" : "no", (t & 0x10) ? "yes" : "no");

	pci_read_config_byte(dev, VIA_IDE_ENABLE, &t);
	via_print("Enabled:               %10s%20s", (t & 0x02) ? "yes" : "no", (t & 0x01) ? "yes" : "no");

	c = inb(via_base + 0x02) | (inb(via_base + 0x0a) << 8);
	via_print("Simplex only:          %10s%20s", (c & 0x80) ? "yes" : "no", (c & 0x8000) ? "yes" : "no");

	via_print("Cable Type:            %10s%20s", (via_80w & 1) ? "80w" : "40w", (via_80w & 2) ? "80w" : "40w");

	via_print("-------------------drive0----drive1----drive2----drive3-----");

	pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
	pci_read_config_dword(dev, VIA_DRIVE_TIMING, &v);
	pci_read_config_word(dev, VIA_8BIT_TIMING, &w);

	if (via_config->flags & VIA_UDMA)
		pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
	else u = 0;

	for (i = 0; i < 4; i++) {

		setup[i]     = ((t >> ((3 - i) << 1)) & 0x3) + 1;
		recover8b[i] = ((w >> ((1 - (i >> 1)) << 3)) & 0xf) + 1;
		active8b[i]  = ((w >> (((1 - (i >> 1)) << 3) + 4)) & 0xf) + 1;
		active[i]    = ((v >> (((3 - i) << 3) + 4)) & 0xf) + 1;
		recover[i]   = ((v >> ((3 - i) << 3)) & 0xf) + 1;
		udma[i]      = ((u >> ((3 - i) << 3)) & 0x7) + 2;
		umul[i]      = ((u >> (((3 - i) & 2) << 3)) & 0x8) ? 1 : 2;
		uen[i]       = ((u >> ((3 - i) << 3)) & 0x20);
		den[i]       = (c & ((i & 1) ? 0x40 : 0x20) << ((i & 2) << 2));

		speed[i] = 20 * via_clock / (active[i] + recover[i]);
		cycle[i] = 1000 / via_clock * (active[i] + recover[i]);

		if (!uen[i] || !den[i])
			continue;

		switch (via_config->flags & VIA_UDMA) {
			
			case VIA_UDMA_100:
				speed[i] = 60 * via_clock / udma[i];
				cycle[i] = 333 / via_clock * udma[i];
				break;

			case VIA_UDMA_66:
				speed[i] = 40 * via_clock / (udma[i] * umul[i]);
				cycle[i] = 500 / via_clock * (udma[i] * umul[i]);
				break;

			case VIA_UDMA_33:
				speed[i] = 20 * via_clock / udma[i];
				cycle[i] = 1000 / via_clock * udma[i];
				break;
		}
	}

	via_print_drive("Transfer Mode: ", "%10s", den[i] ? (uen[i] ? "UDMA" : "DMA") : "PIO");

	via_print_drive("Address Setup: ", "%8dns", (1000 / via_clock) * setup[i]);
	via_print_drive("Cmd Active:    ", "%8dns", (1000 / via_clock) * active8b[i]);
	via_print_drive("Cmd Recovery:  ", "%8dns", (1000 / via_clock) * recover8b[i]);
	via_print_drive("Data Active:   ", "%8dns", (1000 / via_clock) * active[i]);
	via_print_drive("Data Recovery: ", "%8dns", (1000 / via_clock) * recover[i]);
	via_print_drive("Cycle Time:    ", "%8dns", cycle[i]);
	via_print_drive("Transfer Rate: ", "%4d.%dMB/s", speed[i] / 10, speed[i] % 10);

	return p - buffer;	/* hoping it is less than 4K... */
}

#endif

/*
 * via_set_speed() writes timing values to the chipset registers
 */

static void via_set_speed(struct pci_dev *dev, unsigned char dn, struct ide_timing *timing)
{
	unsigned char t;

	pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
	t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
	pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);