--- /dev/null
+/*
+ * 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);
Code Review / kvmfornfv.git / blobdiff