patch-2.4.20 linux-2.4.20/drivers/scsi/zalon7xx.c

• Lines: 163
• Date: Thu Nov 28 15:53:14 2002
• Orig file: linux-2.4.19/drivers/scsi/zalon7xx.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/scsi/zalon7xx.c linux-2.4.20/drivers/scsi/zalon7xx.c
@@ -0,0 +1,162 @@
+/*
+ * Zalon 53c7xx device driver.
+ * By Richard Hirst (rhirst@linuxcare.com)
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/mm.h>
+#include <linux/blk.h>
+#include <linux/sched.h>
+#include <linux/version.h>
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/delay.h>
+#include <asm/gsc.h>
+
+#include "scsi.h"
+#include "hosts.h"
+
+/*
+ * **      Define the BSD style u_int32 and u_int64 type.
+ * **      Are in fact u_int32_t and u_int64_t :-)
+ * */
+typedef u32 u_int32;
+typedef u64 u_int64;
+typedef u_long          vm_offset_t;
+
+#include "zalon7xx.h"
+
+
+/* hosts_* are kluges to pass info between the zalon7xx_detected()
+** and the register_parisc_driver() callbacks.
+*/
+static Scsi_Host_Template *hosts_tptr;
+static int hosts_used=0;
+static int zalon_id = 0;
+
+extern int zalon_attach(Scsi_Host_Template *tpnt,
+			unsigned long base_addr,
+			struct parisc_device *dev,
+			int irq_vector,
+			int unit
+			);
+
+
+#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", __FUNCTION__, status);
+		clock = defaultclock; 
+	}
+
+	printk(KERN_DEBUG "%s: SCSI clock %d\n", __FUNCTION__, clock);
+ 	return clock;
+}
+#endif
+
+static int __init
+zalon_scsi_callback(struct parisc_device *dev)
+{
+	struct gsc_irq gsc_irq;
+	u32 zalon_vers;
+	int irq;
+	unsigned long zalon = dev->hpa;
+
+	__raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);
+	while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))
+		;
+	__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(dev->hpa + IO_MODULE_II_CDATA) & 0x07000000;
+	zalon_vers >>= 24;
+
+	/* Setup the interrupts first.
+	** Later on request_irq() will register the handler.
+	*/
+        irq = gsc_alloc_irq(&gsc_irq);
+
+	printk("%s: Zalon vers field is 0x%x, IRQ %d\n", __FUNCTION__,
+		zalon_vers, irq);
+
+	__raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, dev->hpa + IO_MODULE_EIM);
+
+	if ( zalon_vers == 0)
+		printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __FUNCTION__);
+
+	/*
+	**  zalon_attach: returns -1 on failure, 0 on success
+	*/
+	hosts_used = zalon_attach(hosts_tptr, dev->hpa + GSC_SCSI_ZALON_OFFSET,
+			dev, irq, zalon_id);
+
+	if (hosts_used == 0)
+		zalon_id++;
+
+	hosts_used = (hosts_used == 0);
+	return (hosts_used == 0);
+}
+
+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 struct parisc_driver zalon_driver = {
+	name:		"GSC SCSI (Zalon)",
+	id_table:	zalon_tbl,
+	probe:		zalon_scsi_callback,
+};
+
+int zalon7xx_detect(Scsi_Host_Template *tpnt)
+{
+	/* "pass" the parameter to the callback functions */
+	hosts_tptr = tpnt;
+	hosts_used = 0;
+
+	/* claim all zalon cards. */
+	register_parisc_driver(&zalon_driver);
+
+	/* Check if any callbacks actually found/claimed anything. */
+	return (hosts_used != 0);
+}
+
+#ifdef MODULE
+extern int ncr53c8xx_release(struct Scsi_Host *host);
+
+int zalon7xx_release(struct Scsi_Host *host)
+{
+	ncr53c8xx_release(host);
+	unregister_parisc_driver(&zalon_driver);
+	return 1;
+}
+#endif