[libata] Add a bunch of PATA drivers.

The vast majority of drivers and changes are from Alan Cox.  Albert Lee
contributed and maintains pata_pdc2027x.  Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 403 insertions, 0 deletions

diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
new file mode 100644
index 00000000000..ededb40e084
--- /dev/null
+++ b/drivers/ata/pata_qdi.c
@@ -0,0 +1,403 @@
+/*
+ *    pata_qdi.c - QDI VLB ATA controllers
+ *	(C) 2006 Red Hat <alan@redhat.com>
+ *
+ * This driver mostly exists as a proof of concept for non PCI devices under
+ * libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly
+ * useful.
+ *
+ * Tuning code written from the documentation at
+ * http://www.ryston.cz/petr/vlb/qd6500.html
+ * http://www.ryston.cz/petr/vlb/qd6580.html
+ *
+ * Probe code based on drivers/ide/legacy/qd65xx.c
+ * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
+ * Samuel Thibault <samuel.thibault@fnac.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+
+#define DRV_NAME "pata_qdi"
+#define DRV_VERSION "0.2.4"
+
+#define NR_HOST 4	/* Two 6580s */
+
+struct qdi_data {
+	unsigned long timing;
+	u8 clock[2];
+	u8 last;
+	int fast;
+	struct platform_device *platform_dev;
+	
+};
+
+static struct ata_host *qdi_host[NR_HOST];
+static struct qdi_data qdi_data[NR_HOST];
+static int nr_qdi_host;
+
+#ifdef MODULE
+static int probe_qdi = 1;
+#else
+static int probe_qdi;
+#endif
+
+static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ata_timing t;
+	struct qdi_data *qdi = ap->host->private_data;
+	int active, recovery;
+	u8 timing;
+
+	/* Get the timing data in cycles */
+	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
+	
+	if (qdi->fast) {
+		active = 8 - FIT(t.active, 1, 8);
+		recovery = 18 - FIT(t.recover, 3, 18);
+	} else {
+		active = 9 - FIT(t.active, 2, 9);
+		recovery = 15 - FIT(t.recover, 0, 15);
+	}
+	timing = (recovery << 4) | active | 0x08;
+	
+	qdi->clock[adev->devno] = timing;
+
+	outb(timing, qdi->timing);	
+}
+
+static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ata_timing t;
+	struct qdi_data *qdi = ap->host->private_data;
+	int active, recovery;
+	u8 timing;
+
+	/* Get the timing data in cycles */
+	ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
+	
+	if (qdi->fast) {
+		active = 8 - FIT(t.active, 1, 8);
+		recovery = 18 - FIT(t.recover, 3, 18);
+	} else {
+		active = 9 - FIT(t.active, 2, 9);
+		recovery = 15 - FIT(t.recover, 0, 15);
+	}
+	timing = (recovery << 4) | active | 0x08;
+	
+	qdi->clock[adev->devno] = timing;
+
+	outb(timing, qdi->timing);
+	
+	/* Clear the FIFO */
+	if (adev->class != ATA_DEV_ATA)
+		outb(0x5F, (qdi->timing & 0xFFF0) + 3);
+}
+
+/**
+ *	qdi_qc_issue_prot	-	command issue
+ *	@qc: command pending
+ *
+ *	Called when the libata layer is about to issue a command. We wrap
+ *	this interface so that we can load the correct ATA timings.
+ */
+
+static unsigned int qdi_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+	struct ata_port *ap = qc->ap;
+	struct ata_device *adev = qc->dev;
+	struct qdi_data *qdi = ap->host->private_data;
+
+	if (qdi->clock[adev->devno] != qdi->last) {
+		if (adev->pio_mode) {
+			qdi->last = qdi->clock[adev->devno];
+			outb(qdi->clock[adev->devno], qdi->timing);
+		}
+	}
+	return ata_qc_issue_prot(qc);
+}
+
+static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
+{
+	struct ata_port *ap = adev->ap;
+	int slop = buflen & 3;
+	
+	if (ata_id_has_dword_io(adev->id)) {
+		if (write_data)
+			outsl(ap->ioaddr.data_addr, buf, buflen >> 2);
+		else
+			insl(ap->ioaddr.data_addr, buf, buflen >> 2);
+	
+		if (unlikely(slop)) {
+			u32 pad;
+			if (write_data) {
+				memcpy(&pad, buf + buflen - slop, slop);
+				outl(le32_to_cpu(pad), ap->ioaddr.data_addr);
+			} else {
+				pad = cpu_to_le16(inl(ap->ioaddr.data_addr));
+				memcpy(buf + buflen - slop, &pad, slop);
+			}
+		}
+	} else
+		ata_pio_data_xfer(adev, buf, buflen, write_data);
+}
+
+static struct scsi_host_template qdi_sht = {
+	.module			= THIS_MODULE,
+	.name			= DRV_NAME,
+	.ioctl			= ata_scsi_ioctl,
+	.queuecommand		= ata_scsi_queuecmd,
+	.can_queue		= ATA_DEF_QUEUE,
+	.this_id		= ATA_SHT_THIS_ID,
+	.sg_tablesize		= LIBATA_MAX_PRD,
+	.max_sectors		= ATA_MAX_SECTORS,
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
+	.emulated		= ATA_SHT_EMULATED,
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,
+	.proc_name		= DRV_NAME,
+	.dma_boundary		= ATA_DMA_BOUNDARY,
+	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
+};
+
+static struct ata_port_operations qdi6500_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= qdi6500_set_piomode,
+
+	.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,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= ata_bmdma_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+	
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= qdi_qc_issue_prot,
+	.eng_timeout	= ata_eng_timeout,
+	.data_xfer	= qdi_data_xfer,
+
+	.irq_handler	= ata_interrupt,
+	.irq_clear	= ata_bmdma_irq_clear,
+	
+	.port_start	= ata_port_start,
+	.port_stop	= ata_port_stop,
+	.host_stop	= ata_host_stop
+};	
+
+static struct ata_port_operations qdi6580_port_ops = {
+	.port_disable	= ata_port_disable,
+	.set_piomode	= qdi6580_set_piomode,
+
+	.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,
+
+	.freeze		= ata_bmdma_freeze,
+	.thaw		= ata_bmdma_thaw,
+	.error_handler	= ata_bmdma_error_handler,
+	.post_internal_cmd = ata_bmdma_post_internal_cmd,
+	
+	.qc_prep 	= ata_qc_prep,
+	.qc_issue	= qdi_qc_issue_prot,
+	.eng_timeout	= ata_eng_timeout,
+	.data_xfer	= qdi_data_xfer,
+
+	.irq_handler	= ata_interrupt,
+	.irq_clear	= ata_bmdma_irq_clear,
+	
+	.port_start	= ata_port_start,
+	.port_stop	= ata_port_stop,
+	.host_stop	= ata_host_stop
+};	
+
+/**
+ *	qdi_init_one		-	attach a qdi interface
+ *	@type: Type to display
+ *	@io: I/O port start
+ *	@irq: interrupt line
+ *	@fast: True if on a > 33Mhz VLB
+ *
+ *	Register an ISA bus IDE interface. Such interfaces are PIO and we
+ *	assume do not support IRQ sharing.
+ */
+ 
+static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
+{
+	struct ata_probe_ent ae;
+	struct platform_device *pdev;
+	int ret;
+
+	unsigned long ctrl = io + 0x206;
+
+	/*
+	 *	Fill in a probe structure first of all
+	 */
+
+	pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
+	if (pdev == NULL)
+		return -ENOMEM;
+	
+	memset(&ae, 0, sizeof(struct ata_probe_ent));
+	INIT_LIST_HEAD(&ae.node);
+	ae.dev = &pdev->dev;
+	
+	if (type == 6580) {
+		ae.port_ops = &qdi6580_port_ops;
+		ae.pio_mask = 0x1F;
+	} else {
+		ae.port_ops = &qdi6500_port_ops;
+		ae.pio_mask = 0x07;	/* Actually PIO3 !IORDY is possible */
+	}
+	
+	ae.sht = &qdi_sht;
+	ae.n_ports = 1;
+	ae.irq = irq;
+	ae.irq_flags = 0;
+	ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
+	ae.port[0].cmd_addr = io;
+	ae.port[0].altstatus_addr = ctrl;
+	ae.port[0].ctl_addr =	ctrl;
+	ata_std_ports(&ae.port[0]);
+
+	/*
+	 *	Hook in a private data structure per channel
+	 */
+	ae.private_data = &qdi_data[nr_qdi_host];
+
+	qdi_data[nr_qdi_host].timing = port;
+	qdi_data[nr_qdi_host].fast = fast;
+	qdi_data[nr_qdi_host].platform_dev = pdev;
+
+	printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
+	ret = ata_device_add(&ae);
+	if (ret == 0) {
+		platform_device_unregister(pdev);
+		return -ENODEV;
+	}
+		
+	qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
+	return 0;	
+}
+
+/**
+ *	qdi_init		-	attach qdi interfaces
+ *
+ *	Attach qdi IDE interfaces by scanning the ports it may occupy.
+ */
+ 
+static __init int qdi_init(void)
+{
+	unsigned long flags;
+	static const unsigned long qd_port[2] = { 0x30, 0xB0 };
+	static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
+	static const int ide_irq[2] = { 14, 15 };
+	
+	int ct = 0;
+	int i;
+	
+	if (probe_qdi == 0)
+		return -ENODEV;
+	
+	/*
+ 	 *	Check each possible QD65xx base address
+	 */
+	
+	for (i = 0; i < 2; i++) {
+		unsigned long port = qd_port[i];
+		u8 r, res;
+		
+		
+		if (request_region(port, 2, "pata_qdi")) {
+			/* Check for a card */
+			local_irq_save(flags);
+			r = inb_p(port);
+			outb_p(0x19, port);
+			res = inb_p(port);
+			outb_p(r, port);
+			local_irq_restore(flags);
+		
+			/* Fail */
+			if (res == 0x19)
+			{
+				release_region(port, 2);
+				continue;
+			}
+			
+			/* Passes the presence test */
+			r = inb_p(port + 1);	/* Check port agrees with port set */
+			if ((r & 2) >> 1 != i) {
+				release_region(port, 2);
+				continue;
+			}
+
+			/* Check card type */			
+			if ((r & 0xF0) == 0xC0) {
+				/* QD6500: single channel */
+				if (r & 8) {
+					/* Disabled ? */
+					release_region(port, 2);
+					continue;
+				}
+				ct += qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
+			}
+			if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
+				/* QD6580: dual channel */
+				if (!request_region(port + 2 , 2, "pata_qdi"))
+				{
+					release_region(port, 2);
+					continue;
+				}
+				res = inb(port + 3);
+				if (res & 1) {
+					/* Single channel mode */
+					ct += qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
+				} else {
+					/* Dual channel mode */
+					ct += qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04);
+					ct += qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04);
+				}
+			}
+		}
+	}
+	if (ct != 0)
+		return 0;
+	return -ENODEV;
+}
+
+static __exit void qdi_exit(void)
+{
+	int i;
+
+	for (i = 0; i < nr_qdi_host; i++) {
+		ata_host_remove(qdi_host[i]);
+		/* Free the control resource. The 6580 dual channel has the resources
+		 * claimed as a pair of 2 byte resources so we need no special cases...
+		 */
+		release_region(qdi_data[i].timing, 2);
+		platform_device_unregister(qdi_data[i].platform_dev);
+	}	
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for qdi ATA");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(qdi_init);
+module_exit(qdi_exit);
+
+module_param(probe_qdi, int, 0);
+