pata_ali.c

linux 内核源代码

	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,

	.port_start	= ata_sff_port_start,
};

/*
 *	Port operations for DMA capable ALi without cable
 *	detect
 */
static struct ata_port_operations ali_20_port_ops = {
	.set_piomode	= ali_set_piomode,
	.set_dmamode	= ali_set_dmamode,
	.mode_filter	= ali_20_filter,

	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,
	.dev_config	= ali_lock_sectors,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ata_cable_40wire,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= ata_bmdma_start,
	.bmdma_stop	= ata_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,

	.port_start	= ata_sff_port_start,
};

/*
 *	Port operations for DMA capable ALi with cable detect
 */
static struct ata_port_operations ali_c2_port_ops = {
	.set_piomode	= ali_set_piomode,
	.set_dmamode	= ali_set_dmamode,
	.mode_filter	= ata_pci_default_filter,
	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_atapi_dma = ali_check_atapi_dma,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,
	.dev_config	= ali_lock_sectors,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ali_c2_cable_detect,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= ata_bmdma_start,
	.bmdma_stop	= ata_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,

	.port_start	= ata_sff_port_start,
};

/*
 *	Port operations for DMA capable ALi with cable detect and LBA48
 */
static struct ata_port_operations ali_c5_port_ops = {
	.set_piomode	= ali_set_piomode,
	.set_dmamode	= ali_set_dmamode,
	.mode_filter	= ata_pci_default_filter,
	.tf_load	= ata_tf_load,
	.tf_read	= ata_tf_read,
	.check_atapi_dma = ali_check_atapi_dma,
	.check_status 	= ata_check_status,
	.exec_command	= ata_exec_command,
	.dev_select 	= ata_std_dev_select,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ali_c2_cable_detect,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= ata_bmdma_start,
	.bmdma_stop	= ata_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,

	.port_start	= ata_sff_port_start,
};


/**
 *	ali_init_chipset	-	chip setup function
 *	@pdev: PCI device of ATA controller
 *
 *	Perform the setup on the device that must be done both at boot
 *	and at resume time.
 */

static void ali_init_chipset(struct pci_dev *pdev)
{
	u8 tmp;
	struct pci_dev *north, *isa_bridge;

	/*
	 * The chipset revision selects the driver operations and
	 * mode data.
	 */

	if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
		/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
		pci_read_config_byte(pdev, 0x4B, &tmp);
		/* Clear CD-ROM DMA write bit */
		tmp &= 0x7F;
		pci_write_config_byte(pdev, 0x4B, tmp);
	} else if (pdev->revision >= 0xC2) {
		/* Enable cable detection logic */
		pci_read_config_byte(pdev, 0x4B, &tmp);
		pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
	}
	north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
	isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);

	if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
		/* Configure the ALi bridge logic. For non ALi rely on BIOS.
		   Set the south bridge enable bit */
		pci_read_config_byte(isa_bridge, 0x79, &tmp);
		if (pdev->revision == 0xC2)
			pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
		else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
			pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
	}
	if (pdev->revision >= 0x20) {
		/*
		 * CD_ROM DMA on (0x53 bit 0). Enable this even if we want
		 * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
		 * via 0x54/55.
		 */
		pci_read_config_byte(pdev, 0x53, &tmp);
		if (pdev->revision <= 0x20)
			tmp &= ~0x02;
		if (pdev->revision >= 0xc7)
			tmp |= 0x03;
		else
			tmp |= 0x01;	/* CD_ROM enable for DMA */
		pci_write_config_byte(pdev, 0x53, tmp);
	}
	pci_dev_put(isa_bridge);
	pci_dev_put(north);
	ata_pci_clear_simplex(pdev);
}
/**
 *	ali_init_one		-	discovery callback
 *	@pdev: PCI device ID
 *	@id: PCI table info
 *
 *	An ALi IDE interface has been discovered. Figure out what revision
 *	and perform configuration work before handing it to the ATA layer
 */

static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	static const struct ata_port_info info_early = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = 0x1f,
		.port_ops = &ali_early_port_ops
	};
	/* Revision 0x20 added DMA */
	static const struct ata_port_info info_20 = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.port_ops = &ali_20_port_ops
	};
	/* Revision 0x20 with support logic added UDMA */
	static const struct ata_port_info info_20_udma = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = 0x07,	/* UDMA33 */
		.port_ops = &ali_20_port_ops
	};
	/* Revision 0xC2 adds UDMA66 */
	static const struct ata_port_info info_c2 = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = ATA_UDMA4,
		.port_ops = &ali_c2_port_ops
	};
	/* Revision 0xC3 is UDMA66 for now */
	static const struct ata_port_info info_c3 = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = ATA_UDMA4,
		.port_ops = &ali_c2_port_ops
	};
	/* Revision 0xC4 is UDMA100 */
	static const struct ata_port_info info_c4 = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = ATA_UDMA5,
		.port_ops = &ali_c2_port_ops
	};
	/* Revision 0xC5 is UDMA133 with LBA48 DMA */
	static const struct ata_port_info info_c5 = {
		.sht = &ali_sht,
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = ATA_UDMA6,
		.port_ops = &ali_c5_port_ops
	};

	const struct ata_port_info *ppi[] = { NULL, NULL };
	u8 tmp;
	struct pci_dev *isa_bridge;

	/*
	 * The chipset revision selects the driver operations and
	 * mode data.
	 */

	if (pdev->revision < 0x20) {
		ppi[0] = &info_early;
	} else if (pdev->revision < 0xC2) {
        	ppi[0] = &info_20;
	} else if (pdev->revision == 0xC2) {
        	ppi[0] = &info_c2;
	} else if (pdev->revision == 0xC3) {
        	ppi[0] = &info_c3;
	} else if (pdev->revision == 0xC4) {
        	ppi[0] = &info_c4;
	} else
        	ppi[0] = &info_c5;

	ali_init_chipset(pdev);

	isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
	if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
		/* Are we paired with a UDMA capable chip */
		pci_read_config_byte(isa_bridge, 0x5E, &tmp);
		if ((tmp & 0x1E) == 0x12)
	        	ppi[0] = &info_20_udma;
		pci_dev_put(isa_bridge);
	}
	return ata_pci_init_one(pdev, ppi);
}

#ifdef CONFIG_PM
static int ali_reinit_one(struct pci_dev *pdev)
{
	ali_init_chipset(pdev);
	return ata_pci_device_resume(pdev);
}
#endif

static const struct pci_device_id ali[] = {
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },

	{ },
};

static struct pci_driver ali_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= ali,
	.probe 		= ali_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= ata_pci_device_suspend,
	.resume		= ali_reinit_one,
#endif
};

static int __init ali_init(void)
{
	return pci_register_driver(&ali_pci_driver);
}


static void __exit ali_exit(void)
{
	pci_unregister_driver(&ali_pci_driver);
}


MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for ALi PATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ali);
MODULE_VERSION(DRV_VERSION);

module_init(ali_init);
module_exit(ali_exit);