aec62xx.c

ep9315平台下硬盘驱动的源码

{
	switch (HWIF(drive)->pci_dev->device) {
		case PCI_DEVICE_ID_ARTOP_ATP865:
		case PCI_DEVICE_ID_ARTOP_ATP865R:
		case PCI_DEVICE_ID_ARTOP_ATP860:
		case PCI_DEVICE_ID_ARTOP_ATP860R:
			return ((int) aec6260_tune_chipset(drive, speed));
		case PCI_DEVICE_ID_ARTOP_ATP850UF:
			return ((int) aec6210_tune_chipset(drive, speed));
		default:
			return -1;
	}
}

static int config_chipset_for_dma (ide_drive_t *drive)
{
	u8 speed = ide_dma_speed(drive, aec62xx_ratemask(drive));	

	if (!(speed))
		return 0;

	(void) aec62xx_tune_chipset(drive, speed);
	return ide_dma_enable(drive);
}

static void aec62xx_tune_drive (ide_drive_t *drive, u8 pio)
{
	u8 speed = 0;
	u8 new_pio = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);

	switch(pio) {
		case 5:		speed = new_pio; break;
		case 4:		speed = XFER_PIO_4; break;
		case 3:		speed = XFER_PIO_3; break;
		case 2:		speed = XFER_PIO_2; break;
		case 1:		speed = XFER_PIO_1; break;
		default:	speed = XFER_PIO_0; break;
	}
	(void) aec62xx_tune_chipset(drive, speed);
}

static int aec62xx_config_drive_xfer_rate (ide_drive_t *drive)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct hd_driveid *id	= drive->id;

	if ((id->capability & 1) && drive->autodma) {
		/* Consult the list of known "bad" drives */
		if (hwif->ide_dma_bad_drive(drive))
			goto fast_ata_pio;
		if (id->field_valid & 4) {
			if (id->dma_ultra & hwif->ultra_mask) {
				/* Force if Capable UltraDMA */
				int dma = config_chipset_for_dma(drive);
				if ((id->field_valid & 2) && !dma)
					goto try_dma_modes;
			}
		} else if (id->field_valid & 2) {
try_dma_modes:
			if ((id->dma_mword & hwif->mwdma_mask) ||
			    (id->dma_1word & hwif->swdma_mask)) {
				/* Force if Capable regular DMA modes */
				if (!config_chipset_for_dma(drive))
					goto no_dma_set;
			}
		} else if (hwif->ide_dma_good_drive(drive) &&
			   (id->eide_dma_time < 150)) {
			/* Consult the list of known "good" drives */
			if (!config_chipset_for_dma(drive))
				goto no_dma_set;
		} else {
			goto fast_ata_pio;
		}
	} else if ((id->capability & 8) || (id->field_valid & 2)) {
fast_ata_pio:
no_dma_set:
		aec62xx_tune_drive(drive, 5);
		return hwif->ide_dma_off_quietly(drive);
	}
	return hwif->ide_dma_on(drive);
}

static int aec62xx_irq_timeout (ide_drive_t *drive)
{
	ide_hwif_t *hwif	= HWIF(drive);
	struct pci_dev *dev	= hwif->pci_dev;

	switch(dev->device) {
		case PCI_DEVICE_ID_ARTOP_ATP860:
		case PCI_DEVICE_ID_ARTOP_ATP860R:
		case PCI_DEVICE_ID_ARTOP_ATP865:
		case PCI_DEVICE_ID_ARTOP_ATP865R:
			printk(" AEC62XX time out ");
#if 0
			{
				int i = 0;
				u8 reg49h = 0;
				pci_read_config_byte(HWIF(drive)->pci_dev, 0x49, &reg49h);
				for (i=0;i<256;i++)
					pci_write_config_byte(HWIF(drive)->pci_dev, 0x49, reg49h|0x10);
				pci_write_config_byte(HWIF(drive)->pci_dev, 0x49, reg49h & ~0x10);
			}
			return 0;
#endif
		default:
			break;
	}
#if 0
	{
		ide_hwif_t *hwif	= HWIF(drive);
		struct pci_dev *dev	= hwif->pci_dev;
		u8 tmp1 = 0, tmp2 = 0, mode6 = 0;

		pci_read_config_byte(dev, 0x44, &tmp1);
		pci_read_config_byte(dev, 0x45, &tmp2);
		printk(" AEC6280 r44=%x r45=%x ",tmp1,tmp2);
		mode6 = HWIF(drive)->INB(((hwif->channel) ?
					   hwif->mate->dma_status :
					   hwif->dma_status));
		printk(" AEC6280 133=%x ", (mode6 & 0x10));
	}
#endif
	return 0;
}

static unsigned int __init init_chipset_aec62xx (struct pci_dev *dev, const char *name)
{
	int bus_speed = system_bus_clock();

	if (dev->resource[PCI_ROM_RESOURCE].start) {
		pci_write_config_dword(dev, PCI_ROM_ADDRESS, dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE);
		printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name, dev->resource[PCI_ROM_RESOURCE].start);
	}

#if defined(DISPLAY_AEC62XX_TIMINGS) && defined(CONFIG_PROC_FS)
	aec_devs[n_aec_devs++] = dev;

	if (!aec62xx_proc) {
		aec62xx_proc = 1;
		ide_pci_register_host_proc(&aec62xx_procs[0]);
	}
#endif /* DISPLAY_AEC62XX_TIMINGS && CONFIG_PROC_FS */

	if (bus_speed <= 33)
		pci_set_drvdata(dev, (void *) aec6xxx_33_base);
	else
		pci_set_drvdata(dev, (void *) aec6xxx_34_base);

	return dev->irq;
}

static void __init init_hwif_aec62xx (ide_hwif_t *hwif)
{
	hwif->autodma = 0;
	hwif->tuneproc = &aec62xx_tune_drive;
	hwif->speedproc = &aec62xx_tune_chipset;

	if (hwif->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) {
		hwif->serialized = hwif->channel;
		hwif->no_dsc = 1;
	}

	if (hwif->mate)
		hwif->mate->serialized = hwif->serialized;

	if (!hwif->dma_base) {
		hwif->drives[0].autotune = 1;
		hwif->drives[1].autotune = 1;
		return;
	}

	hwif->ultra_mask = 0x7f;
	hwif->mwdma_mask = 0x07;
	hwif->swdma_mask = 0x07;

	hwif->ide_dma_check	= &aec62xx_config_drive_xfer_rate;
	hwif->ide_dma_lostirq	= &aec62xx_irq_timeout;
	hwif->ide_dma_timeout	= &aec62xx_irq_timeout;
	if (!noautodma)
		hwif->autodma = 1;
	hwif->drives[0].autodma = hwif->autodma;
	hwif->drives[1].autodma = hwif->autodma;
}

static void __init init_dma_aec62xx (ide_hwif_t *hwif, unsigned long dmabase)
{
	struct pci_dev *dev	= hwif->pci_dev;

	if (dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) {
		u8 reg54h = 0;
		unsigned long flags;

		spin_lock_irqsave(&ide_lock, flags);
		pci_read_config_byte(dev, 0x54, &reg54h);
		pci_write_config_byte(dev, 0x54, reg54h & ~(hwif->channel ? 0xF0 : 0x0F));
		spin_unlock_irqrestore(&ide_lock, flags);
	} else {
		u8 ata66	= 0;
		pci_read_config_byte(hwif->pci_dev, 0x49, &ata66);
	        if (!(hwif->udma_four))
			hwif->udma_four = (ata66&(hwif->channel?0x02:0x01))?0:1;
	}

	ide_setup_dma(hwif, dmabase, 8);
}

extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);

static void __init init_setup_aec62xx (struct pci_dev *dev, ide_pci_device_t *d)
{
	ide_setup_pci_device(dev, d);
}

static void __init init_setup_aec6x80 (struct pci_dev *dev, ide_pci_device_t *d)
{
	unsigned long bar4reg = pci_resource_start(dev, 4);

	if (inb(bar4reg+2) & 0x10) {
		strcpy(d->name, "AEC6880");
		if (dev->device == PCI_DEVICE_ID_ARTOP_ATP865R)
			strcpy(d->name, "AEC6880R");
	} else {
		strcpy(d->name, "AEC6280");
		if (dev->device == PCI_DEVICE_ID_ARTOP_ATP865R)
			strcpy(d->name, "AEC6280R");
	}

	ide_setup_pci_device(dev, d);
}

/**
 *	aec62xx_init_one	-	called when a AEC is found
 *	@dev: the aec62xx device
 *	@id: the matching pci id
 *
 *	Called when the PCI registration layer (or the IDE initialization)
 *	finds a device matching our IDE device tables.
 */
 
static int __devinit aec62xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	ide_pci_device_t *d = &aec62xx_chipsets[id->driver_data];

	if (dev->device != d->device)
		BUG();
	d->init_setup(dev, d);
	MOD_INC_USE_COUNT;
	return 0;
}

static struct pci_device_id aec62xx_pci_tbl[] __devinitdata = {
	{ PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP850UF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP860,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
	{ PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP860R,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
	{ PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP865,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },
	{ PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP865R,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
	{ 0, },
};

static struct pci_driver driver = {
	.name		= "AEC62xx IDE",
	.id_table	= aec62xx_pci_tbl,
	.probe		= aec62xx_init_one,
};

static int aec62xx_ide_init(void)
{
	return ide_pci_register_driver(&driver);
}

static void aec62xx_ide_exit(void)
{
	ide_pci_unregister_driver(&driver);
}

module_init(aec62xx_ide_init);
module_exit(aec62xx_ide_exit);

MODULE_AUTHOR("Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for ARTOP AEC62xx IDE");
MODULE_LICENSE("GPL");

EXPORT_NO_SYMBOLS;