Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 395 insertions, 0 deletions

diff --git a/drivers/scsi/arm/arxescsi.c b/drivers/scsi/arm/arxescsi.c
new file mode 100644
index 000000000000..29811f5891ee
--- /dev/null
+++ b/drivers/scsi/arm/arxescsi.c
@@ -0,0 +1,395 @@
+/*
+ * linux/arch/arm/drivers/scsi/arxescsi.c
+ *
+ * Copyright (C) 1997-2000 Russell King, Stefan Hanske
+ *
+ * This driver is based on experimentation.  Hence, it may have made
+ * assumptions about the particular card that I have available, and
+ * may not be reliable!
+ *
+ * Changelog:
+ *  30-08-1997  RMK     0.0.0   Created, READONLY version as cumana_2.c
+ *  22-01-1998  RMK     0.0.1   Updated to 2.1.80
+ *  15-04-1998  RMK     0.0.1   Only do PIO if FAS216 will allow it.
+ *  11-06-1998  SH      0.0.2   Changed to support ARXE 16-bit SCSI card
+ *                              enabled writing
+ *  01-01-2000  SH      0.1.0   Added *real* pseudo dma writing
+ *                              (arxescsi_pseudo_dma_write)
+ *  02-04-2000  RMK     0.1.1   Updated for new error handling code.
+ *  22-10-2000  SH              Updated for new registering scheme.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/unistd.h>
+#include <linux/stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ecard.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+
+struct arxescsi_info {
+        FAS216_Info             info;
+        struct expansion_card   *ec;
+        void __iomem            *base;
+};
+
+#define DMADATA_OFFSET  (0x200)
+
+#define DMASTAT_OFFSET  (0x600)
+#define DMASTAT_DRQ     (1 << 0)
+
+#define CSTATUS_IRQ     (1 << 0)
+
+#define VERSION "1.10 (23/01/2003 2.5.57)"
+
+/*
+ * Function: int arxescsi_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose : initialises DMA/PIO
+ * Params  : host      - host
+ *           SCpnt     - command
+ *           direction - DMA on to/off of card
+ *           min_type  - minimum DMA support that we must have for this transfer
+ * Returns : 0 if we should not set CMD_WITHDMA for transfer info command
+ */
+static fasdmatype_t
+arxescsi_dma_setup(struct Scsi_Host *host, Scsi_Pointer *SCp,
+                       fasdmadir_t direction, fasdmatype_t min_type)
+{
+        /*
+         * We don't do real DMA
+         */
+        return fasdma_pseudo;
+}
+
+static void arxescsi_pseudo_dma_write(unsigned char *addr, void __iomem *base)
+{
+       __asm__ __volatile__(
+       "               stmdb   sp!, {r0-r12}\n"
+       "               mov     r3, %0\n"
+       "               mov     r1, %1\n"
+       "               add     r2, r1, #512\n"
+       "               mov     r4, #256\n"
+       ".loop_1:       ldmia   r3!, {r6, r8, r10, r12}\n"
+       "               mov     r5, r6, lsl #16\n"
+       "               mov     r7, r8, lsl #16\n"
+       ".loop_2:       ldrb    r0, [r1, #1536]\n"
+       "               tst     r0, #1\n"
+       "               beq     .loop_2\n"
+       "               stmia   r2, {r5-r8}\n\t"
+       "               mov     r9, r10, lsl #16\n"
+       "               mov     r11, r12, lsl #16\n"
+       ".loop_3:       ldrb    r0, [r1, #1536]\n"
+       "               tst     r0, #1\n"
+       "               beq     .loop_3\n"
+       "               stmia   r2, {r9-r12}\n"
+       "               subs    r4, r4, #16\n"
+       "               bne     .loop_1\n"
+       "               ldmia   sp!, {r0-r12}\n"
+       :
+       : "r" (addr), "r" (base));
+}
+
+/*
+ * Function: int arxescsi_dma_pseudo(host, SCpnt, direction, transfer)
+ * Purpose : handles pseudo DMA
+ * Params  : host      - host
+ *           SCpnt     - command
+ *           direction - DMA on to/off of card
+ *           transfer  - minimum number of bytes we expect to transfer
+ */
+static void
+arxescsi_dma_pseudo(struct Scsi_Host *host, Scsi_Pointer *SCp,
+                    fasdmadir_t direction, int transfer)
+{
+        struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
+        unsigned int length, error = 0;
+        void __iomem *base = info->info.scsi.io_base;
+        unsigned char *addr;
+
+        length = SCp->this_residual;
+        addr = SCp->ptr;
+
+        if (direction == DMA_OUT) {
+                unsigned int word;
+                while (length > 256) {
+                        if (readb(base + 0x80) & STAT_INT) {
+                                error = 1;
+                                break;
+                        }
+                        arxescsi_pseudo_dma_write(addr, base);
+                        addr += 256;
+                        length -= 256;
+                }
+
+                if (!error)
+                        while (length > 0) {
+                                if (readb(base + 0x80) & STAT_INT)
+                                        break;
+         
+                                if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+                                        continue;
+
+                                word = *addr | *(addr + 1) << 8;
+
+                                writew(word, base + DMADATA_OFFSET);
+                                if (length > 1) {
+                                        addr += 2;
+                                        length -= 2;
+                                } else {
+                                        addr += 1;
+                                        length -= 1;
+                                }
+                        }
+        }
+        else {
+                if (transfer && (transfer & 255)) {
+                        while (length >= 256) {
+                                if (readb(base + 0x80) & STAT_INT) {
+                                        error = 1;
+                                        break;
+                                }
+            
+                                if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+                                        continue;
+
+                                readsw(base + DMADATA_OFFSET, addr, 256 >> 1);
+                                addr += 256;
+                                length -= 256;
+                        }
+                }
+
+                if (!(error))
+                        while (length > 0) {
+                                unsigned long word;
+
+                                if (readb(base + 0x80) & STAT_INT)
+                                        break;
+
+                                if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+                                        continue;
+
+                                word = readw(base + DMADATA_OFFSET);
+                                *addr++ = word;
+                                if (--length > 0) {
+                                        *addr++ = word >> 8;
+                                        length --;
+                                }
+                        }
+        }
+}
+
+/*
+ * Function: int arxescsi_dma_stop(host, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params  : host  - host
+ *           SCpnt - command
+ */
+static void arxescsi_dma_stop(struct Scsi_Host *host, Scsi_Pointer *SCp)
+{
+        /*
+         * no DMA to stop
+         */
+}
+
+/*
+ * Function: const char *arxescsi_info(struct Scsi_Host * host)
+ * Purpose : returns a descriptive string about this interface,
+ * Params  : host - driver host structure to return info for.
+ * Returns : pointer to a static buffer containing null terminated string.
+ */
+static const char *arxescsi_info(struct Scsi_Host *host)
+{
+        struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
+        static char string[150];
+
+        sprintf(string, "%s (%s) in slot %d v%s",
+                host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+                VERSION);
+
+        return string;
+}
+
+/*
+ * Function: int arxescsi_proc_info(char *buffer, char **start, off_t offset,
+ *                                       int length, int host_no, int inout)
+ * Purpose : Return information about the driver to a user process accessing
+ *           the /proc filesystem.
+ * Params  : buffer - a buffer to write information to
+ *           start  - a pointer into this buffer set by this routine to the start
+ *                    of the required information.
+ *           offset - offset into information that we have read upto.
+ *           length - length of buffer
+ *           host_no - host number to return information for
+ *           inout  - 0 for reading, 1 for writing.
+ * Returns : length of data written to buffer.
+ */
+static int
+arxescsi_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length,
+                   int inout)
+{
+        struct arxescsi_info *info;
+        char *p = buffer;
+        int pos;
+
+        info = (struct arxescsi_info *)host->hostdata;
+        if (inout == 1)
+                return -EINVAL;
+
+        p += sprintf(p, "ARXE 16-bit SCSI driver v%s\n", VERSION);
+        p += fas216_print_host(&info->info, p);
+        p += fas216_print_stats(&info->info, p);
+        p += fas216_print_devices(&info->info, p);
+
+        *start = buffer + offset;
+        pos = p - buffer - offset;
+        if (pos > length)
+                pos = length;
+
+        return pos;
+}
+
+static Scsi_Host_Template arxescsi_template = {
+        .proc_info                      = arxescsi_proc_info,
+        .name                           = "ARXE SCSI card",
+        .info                           = arxescsi_info,
+        .queuecommand                   = fas216_noqueue_command,
+        .eh_host_reset_handler          = fas216_eh_host_reset,
+        .eh_bus_reset_handler           = fas216_eh_bus_reset,
+        .eh_device_reset_handler        = fas216_eh_device_reset,
+        .eh_abort_handler               = fas216_eh_abort,
+        .can_queue                      = 0,
+        .this_id                        = 7,
+        .sg_tablesize                   = SG_ALL,
+        .cmd_per_lun                    = 1,
+        .use_clustering                 = DISABLE_CLUSTERING,
+        .proc_name                      = "arxescsi",
+};
+
+static int __devinit
+arxescsi_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+        struct Scsi_Host *host;
+        struct arxescsi_info *info;
+        unsigned long resbase, reslen;
+        void __iomem *base;
+        int ret;
+
+        ret = ecard_request_resources(ec);
+        if (ret)
+                goto out;
+
+        resbase = ecard_resource_start(ec, ECARD_RES_MEMC);
+        reslen = ecard_resource_len(ec, ECARD_RES_MEMC);
+        base = ioremap(resbase, reslen);
+        if (!base) {
+                ret = -ENOMEM;
+                goto out_region;
+        }
+
+        host = scsi_host_alloc(&arxescsi_template, sizeof(struct arxescsi_info));
+        if (!host) {
+                ret = -ENOMEM;
+                goto out_unmap;
+        }
+
+        info = (struct arxescsi_info *)host->hostdata;
+        info->ec = ec;
+        info->base = base;
+
+        info->info.scsi.io_base         = base + 0x2000;
+        info->info.scsi.irq             = NO_IRQ;
+        info->info.scsi.dma             = NO_DMA;
+        info->info.scsi.io_shift        = 5;
+        info->info.ifcfg.clockrate      = 24; /* MHz */
+        info->info.ifcfg.select_timeout = 255;
+        info->info.ifcfg.asyncperiod    = 200; /* ns */
+        info->info.ifcfg.sync_max_depth = 0;
+        info->info.ifcfg.cntl3          = CNTL3_FASTSCSI | CNTL3_FASTCLK;
+        info->info.ifcfg.disconnect_ok  = 0;
+        info->info.ifcfg.wide_max_size  = 0;
+        info->info.ifcfg.capabilities   = FASCAP_PSEUDODMA;
+        info->info.dma.setup            = arxescsi_dma_setup;
+        info->info.dma.pseudo           = arxescsi_dma_pseudo;
+        info->info.dma.stop             = arxescsi_dma_stop;
+                
+        ec->irqaddr = base;
+        ec->irqmask = CSTATUS_IRQ;
+
+        ret = fas216_init(host);
+        if (ret)
+                goto out_unregister;
+
+        ret = fas216_add(host, &ec->dev);
+        if (ret == 0)
+                goto out;
+
+        fas216_release(host);
+ out_unregister:
+        scsi_host_put(host);
+ out_unmap:
+        iounmap(base);
+ out_region:
+        ecard_release_resources(ec);
+ out:
+        return ret;
+}
+
+static void __devexit arxescsi_remove(struct expansion_card *ec)
+{
+        struct Scsi_Host *host = ecard_get_drvdata(ec);
+        struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
+
+        ecard_set_drvdata(ec, NULL);
+        fas216_remove(host);
+
+        iounmap(info->base);
+
+        fas216_release(host);
+        scsi_host_put(host);
+        ecard_release_resources(ec);
+}
+
+static const struct ecard_id arxescsi_cids[] = {
+        { MANU_ARXE, PROD_ARXE_SCSI },
+        { 0xffff, 0xffff },
+};
+
+static struct ecard_driver arxescsi_driver = {
+        .probe          = arxescsi_probe,
+        .remove         = __devexit_p(arxescsi_remove),
+        .id_table       = arxescsi_cids,
+        .drv = {
+                .name           = "arxescsi",
+        },
+};
+
+static int __init init_arxe_scsi_driver(void)
+{
+        return ecard_register_driver(&arxescsi_driver);
+}
+
+static void __exit exit_arxe_scsi_driver(void)
+{
+        ecard_remove_driver(&arxescsi_driver);
+}
+
+module_init(init_arxe_scsi_driver);
+module_exit(exit_arxe_scsi_driver);
+
+MODULE_AUTHOR("Stefan Hanske");
+MODULE_DESCRIPTION("ARXESCSI driver for Acorn machines");
+MODULE_LICENSE("GPL");
+