ide-pci.c

基于组件方式开发操作系统的OSKIT源代码

/*
 *  linux/drivers/block/ide-pci.c	Version 1.02  December 29, 1997
 *
 *  Copyright (c) 1995-1998  Mark Lord
 *  May be copied or modified under the terms of the GNU General Public License
 */

/*
 *  This module provides support for automatic detection and
 *  configuration of all PCI IDE interfaces present in a system.  
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>

#include <asm/io.h>
#include <asm/irq.h>

#include "ide.h"

#define DEVID_PIIXa	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371FB_0})
#define DEVID_PIIXb	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371FB_1})
#define DEVID_PIIX3	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371SB_1})
#define DEVID_PIIX4	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82371AB})
#define DEVID_PIIX4E	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801AB_1})
#define DEVID_PIIX4E2	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82443MX_1})
#define DEVID_PIIX4U	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801AA_1})
#define DEVID_PIIX4U2	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82372FB_1})
#define DEVID_PIIX4NX	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82451NX})
#define DEVID_PIIX4U3	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801BA_9})
#define DEVID_PIIX4U4	((ide_pci_devid_t){PCI_VENDOR_ID_INTEL,   PCI_DEVICE_ID_INTEL_82801BA_8})
#define DEVID_VP_IDE	((ide_pci_devid_t){PCI_VENDOR_ID_VIA,     PCI_DEVICE_ID_VIA_82C586_1})
#define DEVID_PDC20246	((ide_pci_devid_t){PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246})
#define DEVID_RZ1000	((ide_pci_devid_t){PCI_VENDOR_ID_PCTECH,  PCI_DEVICE_ID_PCTECH_RZ1000})
#define DEVID_RZ1001	((ide_pci_devid_t){PCI_VENDOR_ID_PCTECH,  PCI_DEVICE_ID_PCTECH_RZ1001})
#define DEVID_CMD640	((ide_pci_devid_t){PCI_VENDOR_ID_CMD,     PCI_DEVICE_ID_CMD_640})
#define DEVID_CMD646	((ide_pci_devid_t){PCI_VENDOR_ID_CMD,     PCI_DEVICE_ID_CMD_646})
#define DEVID_SIS5513	((ide_pci_devid_t){PCI_VENDOR_ID_SI,      PCI_DEVICE_ID_SI_5513})
#define DEVID_OPTI621	((ide_pci_devid_t){PCI_VENDOR_ID_OPTI,    PCI_DEVICE_ID_OPTI_82C621})
#define DEVID_OPTI621V	((ide_pci_devid_t){PCI_VENDOR_ID_OPTI,    PCI_DEVICE_ID_OPTI_82C558})
#define DEVID_OPTI621X	((ide_pci_devid_t){PCI_VENDOR_ID_OPTI,    0xd568})  /* from datasheets */
#define DEVID_TRM290	((ide_pci_devid_t){PCI_VENDOR_ID_TEKRAM,  PCI_DEVICE_ID_TEKRAM_DC290})
#define DEVID_NS87410	((ide_pci_devid_t){PCI_VENDOR_ID_NS,      PCI_DEVICE_ID_NS_87410})
#define DEVID_NS87415	((ide_pci_devid_t){PCI_VENDOR_ID_NS,      PCI_DEVICE_ID_NS_87415})
#define DEVID_HT6565	((ide_pci_devid_t){PCI_VENDOR_ID_HOLTEK,  PCI_DEVICE_ID_HOLTEK_6565})
#define DEVID_AEC6210	((ide_pci_devid_t){PCI_VENDOR_ID_ARTOP,   PCI_DEVICE_ID_ARTOP_ATP850UF})
#define DEVID_W82C105	((ide_pci_devid_t){PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105})
#define DEVID_UM8886A	((ide_pci_devid_t){PCI_VENDOR_ID_UMC,     PCI_DEVICE_ID_UMC_UM8886A})
#define DEVID_UM8886BF	((ide_pci_devid_t){PCI_VENDOR_ID_UMC,     PCI_DEVICE_ID_UMC_UM8886BF})
#define DEVID_HPT343	((ide_pci_devid_t){PCI_VENDOR_ID_TTI,     PCI_DEVICE_ID_TTI_HPT343})

#define IDE_IGNORE	((void *)-1)

#ifdef CONFIG_BLK_DEV_TRM290
extern void ide_init_trm290(ide_hwif_t *);
#define INIT_TRM290	&ide_init_trm290
#else
#define INIT_TRM290	IDE_IGNORE
#endif

#ifdef CONFIG_BLK_DEV_OPTI621
extern void ide_init_opti621(ide_hwif_t *);
#define INIT_OPTI621	&ide_init_opti621
#else
#define INIT_OPTI621	NULL
#endif

#ifdef CONFIG_BLK_DEV_NS87415
extern void ide_init_ns87415(ide_hwif_t *);
#define INIT_NS87415	&ide_init_ns87415
#else
#define INIT_NS87415	IDE_IGNORE
#endif

#ifdef CONFIG_BLK_DEV_CMD646
extern void ide_init_cmd646(ide_hwif_t *);
#define INIT_CMD646	&ide_init_cmd646
#else
#ifdef __sparc_v9__
#define INIT_CMD646	IDE_IGNORE
#else
#define INIT_CMD646	NULL
#endif
#endif

#ifdef CONFIG_BLK_DEV_SL82C105
extern void ide_init_sl82c105(ide_hwif_t *);
#define INIT_W82C105	&ide_init_sl82c105
#else
#define INIT_W82C105	IDE_IGNORE
#endif

#ifdef CONFIG_BLK_DEV_RZ1000
extern void ide_init_rz1000(ide_hwif_t *);
#define INIT_RZ1000	&ide_init_rz1000
#else
#define INIT_RZ1000	IDE_IGNORE
#endif

#ifdef CONFIG_BLK_DEV_VIA82C586
extern void ide_init_via82c586(ide_hwif_t *);
#define	INIT_VIA82C586	&ide_init_via82c586
#else
#define	INIT_VIA82C586	NULL
#endif

typedef struct ide_pci_enablebit_s {
	byte	reg;	/* byte pci reg holding the enable-bit */
	byte	mask;	/* mask to isolate the enable-bit */
	byte	val;	/* value of masked reg when "enabled" */
} ide_pci_enablebit_t;

typedef struct ide_pci_device_s {
	ide_pci_devid_t		devid;
	const char		*name;
	void 			(*init_hwif)(ide_hwif_t *hwif);
	ide_pci_enablebit_t	enablebits[2];
	byte			bootable;
	unsigned int		extra;
} ide_pci_device_t;

static ide_pci_device_t ide_pci_chipsets[] __initdata = {
	{DEVID_PIIXa,	"PIIX",		NULL,		{{0x41,0x80,0x80}, {0x43,0x80,0x80}}, 	ON_BOARD,	0 },
	{DEVID_PIIXb,	"PIIX",		NULL,		{{0x41,0x80,0x80}, {0x43,0x80,0x80}}, 	ON_BOARD,	0 },
	{DEVID_PIIX3,	"PIIX3",	NULL,		{{0x41,0x80,0x80}, {0x43,0x80,0x80}}, 	ON_BOARD,	0 },
	{DEVID_PIIX4,	"PIIX4",	NULL,		{{0x41,0x80,0x80}, {0x43,0x80,0x80}}, 	ON_BOARD,	0 },
	{DEVID_VP_IDE,	"VP_IDE",	INIT_VIA82C586,	{{0x40,0x02,0x02}, {0x40,0x01,0x01}}, 	ON_BOARD,	0 },
	{DEVID_PDC20246,"PDC20246",	NULL,		{{0x50,0x02,0x02}, {0x50,0x04,0x04}}, 	OFF_BOARD,	16 },
	{DEVID_RZ1000,	"RZ1000",	INIT_RZ1000,	{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_RZ1001,	"RZ1001",	INIT_RZ1000,	{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_CMD640,	"CMD640",	IDE_IGNORE,	{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_NS87410,	"NS87410",	NULL,		{{0x43,0x08,0x08}, {0x47,0x08,0x08}}, 	ON_BOARD,	0 },
	{DEVID_SIS5513,	"SIS5513",	NULL,		{{0x4a,0x02,0x02}, {0x4a,0x04,0x04}}, 	ON_BOARD,	0 },
	{DEVID_CMD646,	"CMD646",	INIT_CMD646,	{{0x00,0x00,0x00}, {0x51,0x80,0x80}}, 	ON_BOARD,	0 },
	{DEVID_HT6565,	"HT6565",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_OPTI621,	"OPTI621",	INIT_OPTI621,	{{0x45,0x80,0x00}, {0x40,0x08,0x00}}, 	ON_BOARD,	0 },
	{DEVID_OPTI621X,"OPTI621X",	INIT_OPTI621,	{{0x45,0x80,0x00}, {0x40,0x08,0x00}}, 	ON_BOARD,	0 },
	{DEVID_TRM290,	"TRM290",	INIT_TRM290,	{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_NS87415,	"NS87415",	INIT_NS87415,	{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_AEC6210,	"AEC6210",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	OFF_BOARD,	0 },
	{DEVID_W82C105,	"W82C105",	INIT_W82C105,	{{0x40,0x01,0x01}, {0x40,0x10,0x10}}, 	ON_BOARD,	0 },
	{DEVID_UM8886A,	"UM8886A",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}},	ON_BOARD,	0 },
	{DEVID_UM8886BF,"UM8886BF",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 },
	{DEVID_HPT343,	"HPT343",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}},	NEVER_BOARD,	16 },
	{IDE_PCI_DEVID_NULL, "PCI_IDE",	NULL,		{{0x00,0x00,0x00}, {0x00,0x00,0x00}}, 	ON_BOARD,	0 }};

/*
 * This allows offboard ide-pci cards the enable a BIOS, verify interrupt
 * settings of split-mirror pci-config space, place chipset into init-mode,
 * and/or preserve an interrupt if the card is not native ide support.
 */
__initfunc(static unsigned int ide_special_settings (struct pci_dev *dev, const char *name))
{
	switch(dev->device) {
		case PCI_DEVICE_ID_ARTOP_ATP850UF:
		case PCI_DEVICE_ID_PROMISE_20246:
			if (dev->rom_address) {
				pci_write_config_byte(dev, PCI_ROM_ADDRESS,
					dev->rom_address | PCI_ROM_ADDRESS_ENABLE);
				printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name, dev->rom_address);
			}
			
			if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) {
				unsigned char irq1 = 0, irq2 = 0;

				pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq1);
				pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);	/* 0xbc */
				if (irq1 != irq2) {
					printk("%s: IRQ1 %d IRQ2 %d\n",
						name, irq1, irq2);
					pci_write_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, irq1);	/* 0xbc */
				}
			}
			return dev->irq;
		case PCI_DEVICE_ID_TTI_HPT343:
			return dev->irq;
		default:
			break;
	}
	return 0;
}

/*
 * Match a PCI IDE port against an entry in ide_hwifs[],
 * based on io_base port if possible.
 */
__initfunc(static ide_hwif_t *ide_match_hwif (unsigned long io_base, byte bootable, const char *name))
{
	int h;
	ide_hwif_t *hwif;

	/*
	 * Look for a hwif with matching io_base specified using
	 * parameters to ide_setup().
	 */
	for (h = 0; h < MAX_HWIFS; ++h) {
		hwif = &ide_hwifs[h];
		if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
			if (hwif->chipset == ide_generic)
				return hwif; /* a perfect match */
		}
	}
	/*
	 * Look for a hwif with matching io_base default value.
	 * If chipset is "ide_unknown", then claim that hwif slot.
	 * Otherwise, some other chipset has already claimed it..  :(
	 */
	for (h = 0; h < MAX_HWIFS; ++h) {
		hwif = &ide_hwifs[h];
		if (hwif->io_ports[IDE_DATA_OFFSET] == io_base) {
			if (hwif->chipset == ide_unknown)
				return hwif; /* match */
			printk("%s: port 0x%04lx already claimed by %s\n", name, io_base, hwif->name);
			return NULL;	/* already claimed */
		}
	}
	/*
	 * Okay, there is no hwif matching our io_base,
	 * so we'll just claim an unassigned slot.
	 * Give preference to claiming other slots before claiming ide0/ide1,
	 * just in case there's another interface yet-to-be-scanned
	 * which uses ports 1f0/170 (the ide0/ide1 defaults).
	 *
	 * Unless there is a bootable card that does not use the standard
	 * ports 1f0/170 (the ide0/ide1 defaults). The (bootable) flag.