1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/scsi/zalon.c b/drivers/scsi/zalon.c
new file mode 100644
index 000000000000..5a51051e31f0
--- /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", __FUNCTION__, status);
+                clock = defaultclock; 
+        }
+
+        printk(KERN_DEBUG "%s: SCSI clock %d\n", __FUNCTION__, 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(dev->hpa, 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", __FUNCTION__,
+                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", __FUNCTION__);
+
+        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 + 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)
+                goto fail;
+
+        if (request_irq(dev->irq, ncr53c8xx_intr, SA_SHIRQ, "zalon", host)) {
+                printk(KERN_ERR "%s: irq problem with %d, detaching\n ",
+                        dev->dev.bus_id, 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 =       __devexit_p(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);