1 files changed, 393 insertions, 0 deletions
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
new file mode 100644
index 000000000..378ed9ea9
--- /dev/null
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -0,0 +1,393 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * pata_pdc202xx_old.c 	- Promise PDC202xx PATA for new ATA layer
+ *			  (C) 2005 Red Hat Inc
+ *			  Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *			  (C) 2007,2009,2010 Bartlomiej Zolnierkiewicz
+ *
+ * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
+ *
+ * First cut with LBA48/ATAPI
+ *
+ * TODO:
+ *	Channel interlock/reset on both required ?
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_pdc202xx_old"
+#define DRV_VERSION "0.4.3"
+
+static int pdc2026x_cable_detect(struct ata_port *ap)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	u16 cis;
+
+	pci_read_config_word(pdev, 0x50, &cis);
+	if (cis & (1 << (10 + ap->port_no)))
+		return ATA_CBL_PATA40;
+	return ATA_CBL_PATA80;
+}
+
+static void pdc202xx_exec_command(struct ata_port *ap,
+				  const struct ata_taskfile *tf)
+{
+	DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
+
+	iowrite8(tf->command, ap->ioaddr.command_addr);
+	ndelay(400);
+}
+
+static bool pdc202xx_irq_check(struct ata_port *ap)
+{
+	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
+	unsigned long master	= pci_resource_start(pdev, 4);
+	u8 sc1d			= inb(master + 0x1d);
+
+	if (ap->port_no) {
+		/*
+		 * bit 7: error, bit 6: interrupting,
+		 * bit 5: FIFO full, bit 4: FIFO empty
+		 */
+		return sc1d & 0x40;
+	} else	{
+		/*
+		 * bit 3: error, bit 2: interrupting,
+		 * bit 1: FIFO full, bit 0: FIFO empty
+		 */
+		return sc1d & 0x04;
+	}
+}
+
+/**
+ *	pdc202xx_configure_piomode	-	set chip PIO timing
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *	@pio: PIO mode
+ *
+ *	Called to do the PIO mode setup. Our timing registers are shared
+ *	so a configure_dmamode call will undo any work we do here and vice
+ *	versa
+ */
+
+static void pdc202xx_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
+	static u16 pio_timing[5] = {
+		0x0913, 0x050C , 0x0308, 0x0206, 0x0104
+	};
+	u8 r_ap, r_bp;
+
+	pci_read_config_byte(pdev, port, &r_ap);
+	pci_read_config_byte(pdev, port + 1, &r_bp);
+	r_ap &= ~0x3F;	/* Preserve ERRDY_EN, SYNC_IN */
+	r_bp &= ~0x1F;
+	r_ap |= (pio_timing[pio] >> 8);
+	r_bp |= (pio_timing[pio] & 0xFF);
+
+	if (ata_pio_need_iordy(adev))
+		r_ap |= 0x20;	/* IORDY enable */
+	if (adev->class == ATA_DEV_ATA)
+		r_ap |= 0x10;	/* FIFO enable */
+	pci_write_config_byte(pdev, port, r_ap);
+	pci_write_config_byte(pdev, port + 1, r_bp);
+}
+
+/**
+ *	pdc202xx_set_piomode	-	set initial PIO mode data
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Called to do the PIO mode setup. Our timing registers are shared
+ *	but we want to set the PIO timing by default.
+ */
+
+static void pdc202xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	pdc202xx_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ *	pdc202xx_configure_dmamode	-	set DMA mode in chip
+ *	@ap: ATA interface
+ *	@adev: ATA device
+ *
+ *	Load DMA cycle times into the chip ready for a DMA transfer
+ *	to occur.
+ */
+
+static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
+	static u8 udma_timing[6][2] = {
+		{ 0x60, 0x03 },	/* 33 Mhz Clock */
+		{ 0x40, 0x02 },
+		{ 0x20, 0x01 },
+		{ 0x40, 0x02 },	/* 66 Mhz Clock */
+		{ 0x20, 0x01 },
+		{ 0x20, 0x01 }
+	};
+	static u8 mdma_timing[3][2] = {
+		{ 0xe0, 0x0f },
+		{ 0x60, 0x04 },
+		{ 0x60, 0x03 },
+	};
+	u8 r_bp, r_cp;
+
+	pci_read_config_byte(pdev, port + 1, &r_bp);
+	pci_read_config_byte(pdev, port + 2, &r_cp);
+
+	r_bp &= ~0xE0;
+	r_cp &= ~0x0F;
+
+	if (adev->dma_mode >= XFER_UDMA_0) {
+		int speed = adev->dma_mode - XFER_UDMA_0;
+		r_bp |= udma_timing[speed][0];
+		r_cp |= udma_timing[speed][1];
+
+	} else {
+		int speed = adev->dma_mode - XFER_MW_DMA_0;
+		r_bp |= mdma_timing[speed][0];
+		r_cp |= mdma_timing[speed][1];
+	}
+	pci_write_config_byte(pdev, port + 1, r_bp);
+	pci_write_config_byte(pdev, port + 2, r_cp);
+
+}
+
+/**
+ *	pdc2026x_bmdma_start		-	DMA engine begin
+ *	@qc: ATA command
+ *
+ *	In UDMA3 or higher we have to clock switch for the duration of the
+ *	DMA transfer sequence.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
+ */
+
+static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct ata_taskfile *tf = &qc->tf;
+	int sel66 = ap->port_no ? 0x08: 0x02;
+
+	void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
+	void __iomem *clock = master + 0x11;
+	void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
+
+	u32 len;
+
+	/* Check we keep host level locking here */
+	if (adev->dma_mode > XFER_UDMA_2)
+		iowrite8(ioread8(clock) | sel66, clock);
+	else
+		iowrite8(ioread8(clock) & ~sel66, clock);
+
+	/* The DMA clocks may have been trashed by a reset. FIXME: make conditional
+	   and move to qc_issue ? */
+	pdc202xx_set_dmamode(ap, qc->dev);
+
+	/* Cases the state machine will not complete correctly without help */
+	if ((tf->flags & ATA_TFLAG_LBA48) ||  tf->protocol == ATAPI_PROT_DMA) {
+		len = qc->nbytes / 2;
+
+		if (tf->flags & ATA_TFLAG_WRITE)
+			len |= 0x06000000;
+		else
+			len |= 0x05000000;
+
+		iowrite32(len, atapi_reg);
+	}
+
+	/* Activate DMA */
+	ata_bmdma_start(qc);
+}
+
+/**
+ *	pdc2026x_bmdma_end		-	DMA engine stop
+ *	@qc: ATA command
+ *
+ *	After a DMA completes we need to put the clock back to 33MHz for
+ *	PIO timings.
+ *
+ *	Note: The host lock held by the libata layer protects
+ *	us from two channels both trying to set DMA bits at once
+ */
+
+static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct ata_taskfile *tf = &qc->tf;
+
+	int sel66 = ap->port_no ? 0x08: 0x02;
+	/* The clock bits are in the same register for both channels */
+	void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
+	void __iomem *clock = master + 0x11;
+	void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
+
+	/* Cases the state machine will not complete correctly */
+	if (tf->protocol == ATAPI_PROT_DMA || (tf->flags & ATA_TFLAG_LBA48)) {
+		iowrite32(0, atapi_reg);
+		iowrite8(ioread8(clock) & ~sel66, clock);
+	}
+	/* Flip back to 33Mhz for PIO */
+	if (adev->dma_mode > XFER_UDMA_2)
+		iowrite8(ioread8(clock) & ~sel66, clock);
+	ata_bmdma_stop(qc);
+	pdc202xx_set_piomode(ap, adev);
+}
+
+/**
+ *	pdc2026x_dev_config	-	device setup hook
+ *	@adev: newly found device
+ *
+ *	Perform chip specific early setup. We need to lock the transfer
+ *	sizes to 8bit to avoid making the state engine on the 2026x cards
+ *	barf.
+ */
+
+static void pdc2026x_dev_config(struct ata_device *adev)
+{
+	adev->max_sectors = 256;
+}
+
+static int pdc2026x_port_start(struct ata_port *ap)
+{
+	void __iomem *bmdma = ap->ioaddr.bmdma_addr;
+	if (bmdma) {
+		/* Enable burst mode */
+		u8 burst = ioread8(bmdma + 0x1f);
+		iowrite8(burst | 0x01, bmdma + 0x1f);
+	}
+	return ata_bmdma_port_start(ap);
+}
+
+/**
+ *	pdc2026x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
+ *	@qc: Metadata associated with taskfile to check
+ *
+ *	Just say no - not supported on older Promise.
+ *
+ *	LOCKING:
+ *	None (inherited from caller).
+ *
+ *	RETURNS: 0 when ATAPI DMA can be used
+ *		 1 otherwise
+ */
+
+static int pdc2026x_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+	return 1;
+}
+
+static struct scsi_host_template pdc202xx_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations pdc2024x_port_ops = {
+	.inherits		= &ata_bmdma_port_ops,
+
+	.cable_detect		= ata_cable_40wire,
+	.set_piomode		= pdc202xx_set_piomode,
+	.set_dmamode		= pdc202xx_set_dmamode,
+
+	.sff_exec_command	= pdc202xx_exec_command,
+	.sff_irq_check		= pdc202xx_irq_check,
+};
+
+static struct ata_port_operations pdc2026x_port_ops = {
+	.inherits		= &pdc2024x_port_ops,
+
+	.check_atapi_dma	= pdc2026x_check_atapi_dma,
+	.bmdma_start		= pdc2026x_bmdma_start,
+	.bmdma_stop		= pdc2026x_bmdma_stop,
+
+	.cable_detect		= pdc2026x_cable_detect,
+	.dev_config		= pdc2026x_dev_config,
+
+	.port_start		= pdc2026x_port_start,
+
+	.sff_exec_command	= pdc202xx_exec_command,
+	.sff_irq_check		= pdc202xx_irq_check,
+};
+
+static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	static const struct ata_port_info info[3] = {
+		{
+			.flags = ATA_FLAG_SLAVE_POSS,
+			.pio_mask = ATA_PIO4,
+			.mwdma_mask = ATA_MWDMA2,
+			.udma_mask = ATA_UDMA2,
+			.port_ops = &pdc2024x_port_ops
+		},
+		{
+			.flags = ATA_FLAG_SLAVE_POSS,
+			.pio_mask = ATA_PIO4,
+			.mwdma_mask = ATA_MWDMA2,
+			.udma_mask = ATA_UDMA4,
+			.port_ops = &pdc2026x_port_ops
+		},
+		{
+			.flags = ATA_FLAG_SLAVE_POSS,
+			.pio_mask = ATA_PIO4,
+			.mwdma_mask = ATA_MWDMA2,
+			.udma_mask = ATA_UDMA5,
+			.port_ops = &pdc2026x_port_ops
+		}
+
+	};
+	const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
+
+	if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
+		struct pci_dev *bridge = dev->bus->self;
+		/* Don't grab anything behind a Promise I2O RAID */
+		if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
+			if (bridge->device == PCI_DEVICE_ID_INTEL_I960)
+				return -ENODEV;
+			if (bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
+				return -ENODEV;
+		}
+	}
+	return ata_pci_bmdma_init_one(dev, ppi, &pdc202xx_sht, NULL, 0);
+}
+
+static const struct pci_device_id pdc202xx[] = {
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
+
+	{ },
+};
+
+static struct pci_driver pdc202xx_pci_driver = {
+	.name 		= DRV_NAME,
+	.id_table	= pdc202xx,
+	.probe 		= pdc202xx_init_one,
+	.remove		= ata_pci_remove_one,
+#ifdef CONFIG_PM_SLEEP
+	.suspend	= ata_pci_device_suspend,
+	.resume		= ata_pci_device_resume,
+#endif
+};
+
+module_pci_driver(pdc202xx_pci_driver);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pdc202xx);
+MODULE_VERSION(DRV_VERSION);