Initial import

1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/scsi/zalon.c b/drivers/scsi/zalon.c
new file mode 100644
index 000000000..97ccb0383
--- /dev/null
+++ b/drivers/scsi/zalon.c
@@ -0,0 +1,205 @@
+/*
+ * Zalon 53c7xx device driver.
+ * By Richard Hirst (rhirst@linuxcare.com)
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+
+#include "../parisc/gsc.h"
+
+#include "ncr53c8xx.h"
+
+MODULE_AUTHOR("Richard Hirst");
+MODULE_DESCRIPTION("Bluefish/Zalon 720 SCSI Driver");
+MODULE_LICENSE("GPL");
+
+#define GSC_SCSI_ZALON_OFFSET 0x800
+
+#define IO_MODULE_EIM		(1*4)
+#define IO_MODULE_DC_ADATA	(2*4)
+#define IO_MODULE_II_CDATA	(3*4)
+#define IO_MODULE_IO_COMMAND	(12*4)
+#define IO_MODULE_IO_STATUS	(13*4)
+
+#define IOSTATUS_RY		0x40
+#define IOSTATUS_FE		0x80
+#define IOIIDATA_SMINT5L	0x40000000
+#define IOIIDATA_MINT5EN	0x20000000
+#define IOIIDATA_PACKEN		0x10000000
+#define IOIIDATA_PREFETCHEN	0x08000000
+#define IOIIDATA_IOII		0x00000020
+
+#define CMD_RESET		5
+
+static struct ncr_chip zalon720_chip __initdata = {
+	.revision_id =	0x0f,
+	.burst_max =	3,
+	.offset_max =	8,
+	.nr_divisor =	4,
+	.features =	FE_WIDE | FE_DIFF | FE_EHP| FE_MUX | FE_EA,
+};
+
+
+
+#if 0
+/* FIXME:
+ * Is this function dead code? or is someone planning on using it in the
+ * future.  The clock = (int) pdc_result[16] does not look correct to
+ * me ... I think it should be iodc_data[16].  Since this cause a compile
+ * error with the new encapsulated PDC, I'm not compiling in this function.
+ * - RB
+ */
+/* poke SCSI clock out of iodc data */
+
+static u8 iodc_data[32] __attribute__ ((aligned (64)));
+static unsigned long pdc_result[32] __attribute__ ((aligned (16))) ={0,0,0,0};
+
+static int 
+lasi_scsi_clock(void * hpa, int defaultclock)
+{
+	int clock, status;
+
+	status = pdc_iodc_read(&pdc_result, hpa, 0, &iodc_data, 32 );
+	if (status == PDC_RET_OK) {
+		clock = (int) pdc_result[16];
+	} else {
+		printk(KERN_WARNING "%s: pdc_iodc_read returned %d\n", __func__, status);
+		clock = defaultclock; 
+	}
+
+	printk(KERN_DEBUG "%s: SCSI clock %d\n", __func__, clock);
+ 	return clock;
+}
+#endif
+
+static struct scsi_host_template zalon7xx_template = {
+	.module		= THIS_MODULE,
+	.proc_name	= "zalon7xx",
+};
+
+static int __init
+zalon_probe(struct parisc_device *dev)
+{
+	struct gsc_irq gsc_irq;
+	u32 zalon_vers;
+	int error = -ENODEV;
+	void __iomem *zalon = ioremap_nocache(dev->hpa.start, 4096);
+	void __iomem *io_port = zalon + GSC_SCSI_ZALON_OFFSET;
+	static int unit = 0;
+	struct Scsi_Host *host;
+	struct ncr_device device;
+
+	__raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);
+	while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))
+		cpu_relax();
+	__raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN,
+		zalon + IO_MODULE_II_CDATA);
+
+	/* XXX: Save the Zalon version for bug workarounds? */
+	zalon_vers = (__raw_readl(zalon + IO_MODULE_II_CDATA) >> 24) & 0x07;
+
+	/* Setup the interrupts first.
+	** Later on request_irq() will register the handler.
+	*/
+	dev->irq = gsc_alloc_irq(&gsc_irq);
+
+	printk(KERN_INFO "%s: Zalon version %d, IRQ %d\n", __func__,
+		zalon_vers, dev->irq);
+
+	__raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, zalon + IO_MODULE_EIM);
+
+	if (zalon_vers == 0)
+		printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __func__);
+
+	memset(&device, 0, sizeof(struct ncr_device));
+
+	/* The following three are needed before any other access. */
+	__raw_writeb(0x20, io_port + 0x38); /* DCNTL_REG,  EA  */
+	__raw_writeb(0x04, io_port + 0x1b); /* CTEST0_REG, EHP */
+	__raw_writeb(0x80, io_port + 0x22); /* CTEST4_REG, MUX */
+
+	/* Initialise ncr_device structure with items required by ncr_attach. */
+	device.chip		= zalon720_chip;
+	device.host_id		= 7;
+	device.dev		= &dev->dev;
+	device.slot.base	= dev->hpa.start + GSC_SCSI_ZALON_OFFSET;
+	device.slot.base_v	= io_port;
+	device.slot.irq		= dev->irq;
+	device.differential	= 2;
+
+	host = ncr_attach(&zalon7xx_template, unit, &device);
+	if (!host)
+		return -ENODEV;
+
+	if (request_irq(dev->irq, ncr53c8xx_intr, IRQF_SHARED, "zalon", host)) {
+	  dev_printk(KERN_ERR, &dev->dev, "irq problem with %d, detaching\n ",
+		     dev->irq);
+		goto fail;
+	}
+
+	unit++;
+
+	dev_set_drvdata(&dev->dev, host);
+
+	error = scsi_add_host(host, &dev->dev);
+	if (error)
+		goto fail_free_irq;
+
+	scsi_scan_host(host);
+	return 0;
+
+ fail_free_irq:
+	free_irq(dev->irq, host);
+ fail:
+	ncr53c8xx_release(host);
+	return error;
+}
+
+static struct parisc_device_id zalon_tbl[] = {
+	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 }, 
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(parisc, zalon_tbl);
+
+static int __exit zalon_remove(struct parisc_device *dev)
+{
+	struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
+
+	scsi_remove_host(host);
+	ncr53c8xx_release(host);
+	free_irq(dev->irq, host);
+
+	return 0;
+}
+
+static struct parisc_driver zalon_driver = {
+	.name =		"zalon",
+	.id_table =	zalon_tbl,
+	.probe =	zalon_probe,
+	.remove =	zalon_remove,
+};
+
+static int __init zalon7xx_init(void)
+{
+	int ret = ncr53c8xx_init();
+	if (!ret)
+		ret = register_parisc_driver(&zalon_driver);
+	if (ret)
+		ncr53c8xx_exit();
+	return ret;
+}
+
+static void __exit zalon7xx_exit(void)
+{
+	unregister_parisc_driver(&zalon_driver);
+	ncr53c8xx_exit();
+}
+
+module_init(zalon7xx_init);
+module_exit(zalon7xx_exit);