![Finn Thain](/assets/img/avatar_default.png)
Apply prototypes to get consistent function signatures for the DMA functions implemented in the board-specific drivers. To avoid using macros to alter actual parameters, some of those functions are reworked slightly. This is a step toward the goal of passing the board-specific routines to the core driver using an ops struct (as in a platform driver or library module). This also helps fix some inconsistent types: where the core driver uses ints (cmd->SCp.this_residual and hostdata->dma_len) for keeping track of transfers, certain board-specific routines used unsigned long. While we are fixing these function signatures, pass the hostdata pointer to DMA routines instead of a Scsi_Host pointer, for shorter and faster code. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
213 lines
4.3 KiB
C
213 lines
4.3 KiB
C
/*
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* Oak Generic NCR5380 driver
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*
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* Copyright 1995-2002, Russell King
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/blkdev.h>
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#include <linux/init.h>
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#include <asm/ecard.h>
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#include <asm/io.h>
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#include <scsi/scsi_host.h>
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#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
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#define NCR5380_read(reg) readb(hostdata->io + ((reg) << 2))
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#define NCR5380_write(reg, value) writeb(value, hostdata->io + ((reg) << 2))
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#define NCR5380_dma_xfer_len NCR5380_dma_xfer_none
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#define NCR5380_dma_recv_setup oakscsi_pread
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#define NCR5380_dma_send_setup oakscsi_pwrite
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#define NCR5380_dma_residual NCR5380_dma_residual_none
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#define NCR5380_queue_command oakscsi_queue_command
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#define NCR5380_info oakscsi_info
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#define NCR5380_implementation_fields /* none */
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#include "../NCR5380.h"
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#undef START_DMA_INITIATOR_RECEIVE_REG
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#define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
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#define STAT ((128 + 16) << 2)
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#define DATA ((128 + 8) << 2)
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static inline int oakscsi_pwrite(struct NCR5380_hostdata *hostdata,
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unsigned char *addr, int len)
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{
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u8 __iomem *base = hostdata->io;
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printk("writing %p len %d\n",addr, len);
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while(1)
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{
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int status;
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while (((status = readw(base + STAT)) & 0x100)==0);
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}
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return 0;
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}
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static inline int oakscsi_pread(struct NCR5380_hostdata *hostdata,
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unsigned char *addr, int len)
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{
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u8 __iomem *base = hostdata->io;
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printk("reading %p len %d\n", addr, len);
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while(len > 0)
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{
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unsigned int status, timeout;
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unsigned long b;
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timeout = 0x01FFFFFF;
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while (((status = readw(base + STAT)) & 0x100)==0)
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{
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timeout--;
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if(status & 0x200 || !timeout)
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{
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printk("status = %08X\n", status);
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return -1;
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}
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}
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if(len >= 128)
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{
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readsw(base + DATA, addr, 128);
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addr += 128;
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len -= 128;
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}
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else
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{
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b = (unsigned long) readw(base + DATA);
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*addr ++ = b;
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len -= 1;
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if(len)
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*addr ++ = b>>8;
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len -= 1;
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}
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}
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return 0;
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}
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#undef STAT
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#undef DATA
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#include "../NCR5380.c"
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static struct scsi_host_template oakscsi_template = {
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.module = THIS_MODULE,
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.name = "Oak 16-bit SCSI",
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.info = oakscsi_info,
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.queuecommand = oakscsi_queue_command,
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.eh_abort_handler = NCR5380_abort,
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.eh_bus_reset_handler = NCR5380_bus_reset,
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.can_queue = 16,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 2,
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.use_clustering = DISABLE_CLUSTERING,
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.proc_name = "oakscsi",
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.cmd_size = NCR5380_CMD_SIZE,
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.max_sectors = 128,
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};
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static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
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{
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struct Scsi_Host *host;
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int ret = -ENOMEM;
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ret = ecard_request_resources(ec);
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if (ret)
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goto out;
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host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
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if (!host) {
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ret = -ENOMEM;
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goto release;
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}
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priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
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ecard_resource_len(ec, ECARD_RES_MEMC));
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if (!priv(host)->io) {
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ret = -ENOMEM;
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goto unreg;
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}
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host->irq = NO_IRQ;
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ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
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if (ret)
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goto out_unmap;
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NCR5380_maybe_reset_bus(host);
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ret = scsi_add_host(host, &ec->dev);
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if (ret)
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goto out_exit;
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scsi_scan_host(host);
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goto out;
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out_exit:
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NCR5380_exit(host);
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out_unmap:
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iounmap(priv(host)->io);
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unreg:
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scsi_host_put(host);
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release:
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ecard_release_resources(ec);
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out:
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return ret;
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}
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static void oakscsi_remove(struct expansion_card *ec)
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{
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struct Scsi_Host *host = ecard_get_drvdata(ec);
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void __iomem *base = priv(host)->io;
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ecard_set_drvdata(ec, NULL);
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scsi_remove_host(host);
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NCR5380_exit(host);
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scsi_host_put(host);
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iounmap(base);
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ecard_release_resources(ec);
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}
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static const struct ecard_id oakscsi_cids[] = {
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{ MANU_OAK, PROD_OAK_SCSI },
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{ 0xffff, 0xffff }
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};
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static struct ecard_driver oakscsi_driver = {
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.probe = oakscsi_probe,
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.remove = oakscsi_remove,
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.id_table = oakscsi_cids,
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.drv = {
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.name = "oakscsi",
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},
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};
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static int __init oakscsi_init(void)
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{
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return ecard_register_driver(&oakscsi_driver);
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}
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static void __exit oakscsi_exit(void)
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{
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ecard_remove_driver(&oakscsi_driver);
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}
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module_init(oakscsi_init);
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module_exit(oakscsi_exit);
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MODULE_AUTHOR("Russell King");
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MODULE_DESCRIPTION("Oak SCSI driver");
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MODULE_LICENSE("GPL");
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