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Diffstat (limited to 'drivers/scsi/arm/cumana_1.c')
-rw-r--r--drivers/scsi/arm/cumana_1.c341
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/scsi/arm/cumana_1.c b/drivers/scsi/arm/cumana_1.c
new file mode 100644
index 000000000..3fd944374
--- /dev/null
+++ b/drivers/scsi/arm/cumana_1.c
@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic Generic NCR5380 driver
+ *
+ * Copyright 1995-2002, Russell King
+ */
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+#include <scsi/scsi_host.h>
+
+#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
+#define NCR5380_read(reg) cumanascsi_read(hostdata, reg)
+#define NCR5380_write(reg, value) cumanascsi_write(hostdata, reg, value)
+
+#define NCR5380_dma_xfer_len cumanascsi_dma_xfer_len
+#define NCR5380_dma_recv_setup cumanascsi_pread
+#define NCR5380_dma_send_setup cumanascsi_pwrite
+#define NCR5380_dma_residual NCR5380_dma_residual_none
+
+#define NCR5380_intr cumanascsi_intr
+#define NCR5380_queue_command cumanascsi_queue_command
+#define NCR5380_info cumanascsi_info
+
+#define NCR5380_implementation_fields \
+ unsigned ctrl
+
+struct NCR5380_hostdata;
+static u8 cumanascsi_read(struct NCR5380_hostdata *, unsigned int);
+static void cumanascsi_write(struct NCR5380_hostdata *, unsigned int, u8);
+
+#include "../NCR5380.h"
+
+#define CTRL 0x16fc
+#define STAT 0x2004
+#define L(v) (((v)<<16)|((v) & 0x0000ffff))
+#define H(v) (((v)>>16)|((v) & 0xffff0000))
+
+static inline int cumanascsi_pwrite(struct NCR5380_hostdata *hostdata,
+ unsigned char *addr, int len)
+{
+ unsigned long *laddr;
+ u8 __iomem *base = hostdata->io;
+ u8 __iomem *dma = hostdata->pdma_io + 0x2000;
+
+ if(!len) return 0;
+
+ writeb(0x02, base + CTRL);
+ laddr = (unsigned long *)addr;
+ while(len >= 32)
+ {
+ unsigned int status;
+ unsigned long v;
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(!(status & 0x40))
+ continue;
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ len -= 32;
+ if(len == 0)
+ break;
+ }
+
+ addr = (unsigned char *)laddr;
+ writeb(0x12, base + CTRL);
+
+ while(len > 0)
+ {
+ unsigned int status;
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ writeb(*addr++, dma);
+ if(--len == 0)
+ break;
+ }
+
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ writeb(*addr++, dma);
+ if(--len == 0)
+ break;
+ }
+ }
+end:
+ writeb(hostdata->ctrl | 0x40, base + CTRL);
+
+ if (len)
+ return -1;
+ return 0;
+}
+
+static inline int cumanascsi_pread(struct NCR5380_hostdata *hostdata,
+ unsigned char *addr, int len)
+{
+ unsigned long *laddr;
+ u8 __iomem *base = hostdata->io;
+ u8 __iomem *dma = hostdata->pdma_io + 0x2000;
+
+ if(!len) return 0;
+
+ writeb(0x00, base + CTRL);
+ laddr = (unsigned long *)addr;
+ while(len >= 32)
+ {
+ unsigned int status;
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(!(status & 0x40))
+ continue;
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ len -= 32;
+ if(len == 0)
+ break;
+ }
+
+ addr = (unsigned char *)laddr;
+ writeb(0x10, base + CTRL);
+
+ while(len > 0)
+ {
+ unsigned int status;
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ *addr++ = readb(dma);
+ if(--len == 0)
+ break;
+ }
+
+ status = readb(base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ *addr++ = readb(dma);
+ if(--len == 0)
+ break;
+ }
+ }
+end:
+ writeb(hostdata->ctrl | 0x40, base + CTRL);
+
+ if (len)
+ return -1;
+ return 0;
+}
+
+static int cumanascsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,
+ struct scsi_cmnd *cmd)
+{
+ return cmd->transfersize;
+}
+
+static u8 cumanascsi_read(struct NCR5380_hostdata *hostdata,
+ unsigned int reg)
+{
+ u8 __iomem *base = hostdata->io;
+ u8 val;
+
+ writeb(0, base + CTRL);
+
+ val = readb(base + 0x2100 + (reg << 2));
+
+ hostdata->ctrl = 0x40;
+ writeb(0x40, base + CTRL);
+
+ return val;
+}
+
+static void cumanascsi_write(struct NCR5380_hostdata *hostdata,
+ unsigned int reg, u8 value)
+{
+ u8 __iomem *base = hostdata->io;
+
+ writeb(0, base + CTRL);
+
+ writeb(value, base + 0x2100 + (reg << 2));
+
+ hostdata->ctrl = 0x40;
+ writeb(0x40, base + CTRL);
+}
+
+#include "../NCR5380.c"
+
+static struct scsi_host_template cumanascsi_template = {
+ .module = THIS_MODULE,
+ .name = "Cumana 16-bit SCSI",
+ .info = cumanascsi_info,
+ .queuecommand = cumanascsi_queue_command,
+ .eh_abort_handler = NCR5380_abort,
+ .eh_host_reset_handler = NCR5380_host_reset,
+ .can_queue = 16,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 2,
+ .proc_name = "CumanaSCSI-1",
+ .cmd_size = NCR5380_CMD_SIZE,
+ .max_sectors = 128,
+ .dma_boundary = PAGE_SIZE - 1,
+};
+
+static int cumanascsi1_probe(struct expansion_card *ec,
+ const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_release;
+ }
+
+ priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
+ ecard_resource_len(ec, ECARD_RES_IOCSLOW));
+ priv(host)->pdma_io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
+ ecard_resource_len(ec, ECARD_RES_MEMC));
+ if (!priv(host)->io || !priv(host)->pdma_io) {
+ ret = -ENOMEM;
+ goto out_unmap;
+ }
+
+ host->irq = ec->irq;
+
+ ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
+ if (ret)
+ goto out_unmap;
+
+ NCR5380_maybe_reset_bus(host);
+
+ priv(host)->ctrl = 0;
+ writeb(0, priv(host)->io + CTRL);
+
+ ret = request_irq(host->irq, cumanascsi_intr, 0,
+ "CumanaSCSI-1", host);
+ if (ret) {
+ printk("scsi%d: IRQ%d not free: %d\n",
+ host->host_no, host->irq, ret);
+ goto out_exit;
+ }
+
+ ret = scsi_add_host(host, &ec->dev);
+ if (ret)
+ goto out_free_irq;
+
+ scsi_scan_host(host);
+ goto out;
+
+ out_free_irq:
+ free_irq(host->irq, host);
+ out_exit:
+ NCR5380_exit(host);
+ out_unmap:
+ iounmap(priv(host)->io);
+ iounmap(priv(host)->pdma_io);
+ scsi_host_put(host);
+ out_release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void cumanascsi1_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ void __iomem *base = priv(host)->io;
+ void __iomem *dma = priv(host)->pdma_io;
+
+ ecard_set_drvdata(ec, NULL);
+
+ scsi_remove_host(host);
+ free_irq(host->irq, host);
+ NCR5380_exit(host);
+ scsi_host_put(host);
+ iounmap(base);
+ iounmap(dma);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id cumanascsi1_cids[] = {
+ { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver cumanascsi1_driver = {
+ .probe = cumanascsi1_probe,
+ .remove = cumanascsi1_remove,
+ .id_table = cumanascsi1_cids,
+ .drv = {
+ .name = "cumanascsi1",
+ },
+};
+
+static int __init cumanascsi_init(void)
+{
+ return ecard_register_driver(&cumanascsi1_driver);
+}
+
+static void __exit cumanascsi_exit(void)
+{
+ ecard_remove_driver(&cumanascsi1_driver);
+}
+
+module_init(cumanascsi_init);
+module_exit(cumanascsi_exit);
+
+MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 22:49:52 +0000