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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Generic Generic NCR5380 driver4 *5 * Copyright 1995-2002, Russell King6 */7#include <linux/module.h>8#include <linux/ioport.h>9#include <linux/blkdev.h>10#include <linux/init.h>11 12#include <asm/ecard.h>13#include <asm/io.h>14 15#include <scsi/scsi_host.h>16 17#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)18#define NCR5380_read(reg) cumanascsi_read(hostdata, reg)19#define NCR5380_write(reg, value) cumanascsi_write(hostdata, reg, value)20 21#define NCR5380_dma_xfer_len cumanascsi_dma_xfer_len22#define NCR5380_dma_recv_setup cumanascsi_pread23#define NCR5380_dma_send_setup cumanascsi_pwrite24#define NCR5380_dma_residual NCR5380_dma_residual_none25 26#define NCR5380_intr cumanascsi_intr27#define NCR5380_queue_command cumanascsi_queue_command28#define NCR5380_info cumanascsi_info29 30#define NCR5380_implementation_fields \31 unsigned ctrl32 33struct NCR5380_hostdata;34static u8 cumanascsi_read(struct NCR5380_hostdata *, unsigned int);35static void cumanascsi_write(struct NCR5380_hostdata *, unsigned int, u8);36 37#include "../NCR5380.h"38 39#define CTRL 0x16fc40#define STAT 0x200441#define L(v) (((v)<<16)|((v) & 0x0000ffff))42#define H(v) (((v)>>16)|((v) & 0xffff0000))43 44static inline int cumanascsi_pwrite(struct NCR5380_hostdata *hostdata,45 unsigned char *addr, int len)46{47 unsigned long *laddr;48 u8 __iomem *base = hostdata->io;49 u8 __iomem *dma = hostdata->pdma_io + 0x2000;50 51 if(!len) return 0;52 53 writeb(0x02, base + CTRL);54 laddr = (unsigned long *)addr;55 while(len >= 32)56 {57 unsigned int status;58 unsigned long v;59 status = readb(base + STAT);60 if(status & 0x80)61 goto end;62 if(!(status & 0x40))63 continue;64 v=*laddr++; writew(L(v), dma); writew(H(v), dma);65 v=*laddr++; writew(L(v), dma); writew(H(v), dma);66 v=*laddr++; writew(L(v), dma); writew(H(v), dma);67 v=*laddr++; writew(L(v), dma); writew(H(v), dma);68 v=*laddr++; writew(L(v), dma); writew(H(v), dma);69 v=*laddr++; writew(L(v), dma); writew(H(v), dma);70 v=*laddr++; writew(L(v), dma); writew(H(v), dma);71 v=*laddr++; writew(L(v), dma); writew(H(v), dma);72 len -= 32;73 if(len == 0)74 break;75 }76 77 addr = (unsigned char *)laddr;78 writeb(0x12, base + CTRL);79 80 while(len > 0)81 {82 unsigned int status;83 status = readb(base + STAT);84 if(status & 0x80)85 goto end;86 if(status & 0x40)87 {88 writeb(*addr++, dma);89 if(--len == 0)90 break;91 }92 93 status = readb(base + STAT);94 if(status & 0x80)95 goto end;96 if(status & 0x40)97 {98 writeb(*addr++, dma);99 if(--len == 0)100 break;101 }102 }103end:104 writeb(hostdata->ctrl | 0x40, base + CTRL);105 106 if (len)107 return -1;108 return 0;109}110 111static inline int cumanascsi_pread(struct NCR5380_hostdata *hostdata,112 unsigned char *addr, int len)113{114 unsigned long *laddr;115 u8 __iomem *base = hostdata->io;116 u8 __iomem *dma = hostdata->pdma_io + 0x2000;117 118 if(!len) return 0;119 120 writeb(0x00, base + CTRL);121 laddr = (unsigned long *)addr;122 while(len >= 32)123 {124 unsigned int status;125 status = readb(base + STAT);126 if(status & 0x80)127 goto end;128 if(!(status & 0x40))129 continue;130 *laddr++ = readw(dma) | (readw(dma) << 16);131 *laddr++ = readw(dma) | (readw(dma) << 16);132 *laddr++ = readw(dma) | (readw(dma) << 16);133 *laddr++ = readw(dma) | (readw(dma) << 16);134 *laddr++ = readw(dma) | (readw(dma) << 16);135 *laddr++ = readw(dma) | (readw(dma) << 16);136 *laddr++ = readw(dma) | (readw(dma) << 16);137 *laddr++ = readw(dma) | (readw(dma) << 16);138 len -= 32;139 if(len == 0)140 break;141 }142 143 addr = (unsigned char *)laddr;144 writeb(0x10, base + CTRL);145 146 while(len > 0)147 {148 unsigned int status;149 status = readb(base + STAT);150 if(status & 0x80)151 goto end;152 if(status & 0x40)153 {154 *addr++ = readb(dma);155 if(--len == 0)156 break;157 }158 159 status = readb(base + STAT);160 if(status & 0x80)161 goto end;162 if(status & 0x40)163 {164 *addr++ = readb(dma);165 if(--len == 0)166 break;167 }168 }169end:170 writeb(hostdata->ctrl | 0x40, base + CTRL);171 172 if (len)173 return -1;174 return 0;175}176 177static int cumanascsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,178 struct scsi_cmnd *cmd)179{180 return cmd->transfersize;181}182 183static u8 cumanascsi_read(struct NCR5380_hostdata *hostdata,184 unsigned int reg)185{186 u8 __iomem *base = hostdata->io;187 u8 val;188 189 writeb(0, base + CTRL);190 191 val = readb(base + 0x2100 + (reg << 2));192 193 hostdata->ctrl = 0x40;194 writeb(0x40, base + CTRL);195 196 return val;197}198 199static void cumanascsi_write(struct NCR5380_hostdata *hostdata,200 unsigned int reg, u8 value)201{202 u8 __iomem *base = hostdata->io;203 204 writeb(0, base + CTRL);205 206 writeb(value, base + 0x2100 + (reg << 2));207 208 hostdata->ctrl = 0x40;209 writeb(0x40, base + CTRL);210}211 212#include "../NCR5380.c"213 214static const struct scsi_host_template cumanascsi_template = {215 .module = THIS_MODULE,216 .name = "Cumana 16-bit SCSI",217 .info = cumanascsi_info,218 .queuecommand = cumanascsi_queue_command,219 .eh_abort_handler = NCR5380_abort,220 .eh_host_reset_handler = NCR5380_host_reset,221 .can_queue = 16,222 .this_id = 7,223 .sg_tablesize = SG_ALL,224 .cmd_per_lun = 2,225 .proc_name = "CumanaSCSI-1",226 .cmd_size = sizeof(struct NCR5380_cmd),227 .max_sectors = 128,228 .dma_boundary = PAGE_SIZE - 1,229};230 231static int cumanascsi1_probe(struct expansion_card *ec,232 const struct ecard_id *id)233{234 struct Scsi_Host *host;235 int ret;236 237 ret = ecard_request_resources(ec);238 if (ret)239 goto out;240 241 host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));242 if (!host) {243 ret = -ENOMEM;244 goto out_release;245 }246 247 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),248 ecard_resource_len(ec, ECARD_RES_IOCSLOW));249 priv(host)->pdma_io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),250 ecard_resource_len(ec, ECARD_RES_MEMC));251 if (!priv(host)->io || !priv(host)->pdma_io) {252 ret = -ENOMEM;253 goto out_unmap;254 }255 256 host->irq = ec->irq;257 258 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);259 if (ret)260 goto out_unmap;261 262 NCR5380_maybe_reset_bus(host);263 264 priv(host)->ctrl = 0;265 writeb(0, priv(host)->io + CTRL);266 267 ret = request_irq(host->irq, cumanascsi_intr, 0,268 "CumanaSCSI-1", host);269 if (ret) {270 printk("scsi%d: IRQ%d not free: %d\n",271 host->host_no, host->irq, ret);272 goto out_exit;273 }274 275 ret = scsi_add_host(host, &ec->dev);276 if (ret)277 goto out_free_irq;278 279 scsi_scan_host(host);280 goto out;281 282 out_free_irq:283 free_irq(host->irq, host);284 out_exit:285 NCR5380_exit(host);286 out_unmap:287 iounmap(priv(host)->io);288 iounmap(priv(host)->pdma_io);289 scsi_host_put(host);290 out_release:291 ecard_release_resources(ec);292 out:293 return ret;294}295 296static void cumanascsi1_remove(struct expansion_card *ec)297{298 struct Scsi_Host *host = ecard_get_drvdata(ec);299 void __iomem *base = priv(host)->io;300 void __iomem *dma = priv(host)->pdma_io;301 302 ecard_set_drvdata(ec, NULL);303 304 scsi_remove_host(host);305 free_irq(host->irq, host);306 NCR5380_exit(host);307 scsi_host_put(host);308 iounmap(base);309 iounmap(dma);310 ecard_release_resources(ec);311}312 313static const struct ecard_id cumanascsi1_cids[] = {314 { MANU_CUMANA, PROD_CUMANA_SCSI_1 },315 { 0xffff, 0xffff }316};317 318static struct ecard_driver cumanascsi1_driver = {319 .probe = cumanascsi1_probe,320 .remove = cumanascsi1_remove,321 .id_table = cumanascsi1_cids,322 .drv = {323 .name = "cumanascsi1",324 },325};326 327static int __init cumanascsi_init(void)328{329 return ecard_register_driver(&cumanascsi1_driver);330}331 332static void __exit cumanascsi_exit(void)333{334 ecard_remove_driver(&cumanascsi1_driver);335}336 337module_init(cumanascsi_init);338module_exit(cumanascsi_exit);339 340MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");341MODULE_LICENSE("GPL");342