1 // SPDX-License-Identifier: GPL-2.0-only
3 * Generic Generic NCR5380 driver
5 * Copyright 1995-2002, Russell King
7 #include <linux/module.h>
8 #include <linux/ioport.h>
9 #include <linux/blkdev.h>
10 #include <linux/init.h>
12 #include <asm/ecard.h>
15 #include <scsi/scsi_host.h>
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)
21 #define NCR5380_dma_xfer_len cumanascsi_dma_xfer_len
22 #define NCR5380_dma_recv_setup cumanascsi_pread
23 #define NCR5380_dma_send_setup cumanascsi_pwrite
24 #define NCR5380_dma_residual NCR5380_dma_residual_none
26 #define NCR5380_intr cumanascsi_intr
27 #define NCR5380_queue_command cumanascsi_queue_command
28 #define NCR5380_info cumanascsi_info
30 #define NCR5380_implementation_fields \
33 struct NCR5380_hostdata;
34 static u8 cumanascsi_read(struct NCR5380_hostdata *, unsigned int);
35 static void cumanascsi_write(struct NCR5380_hostdata *, unsigned int, u8);
37 #include "../NCR5380.h"
41 #define L(v) (((v)<<16)|((v) & 0x0000ffff))
42 #define H(v) (((v)>>16)|((v) & 0xffff0000))
44 static inline int cumanascsi_pwrite(struct NCR5380_hostdata *hostdata,
45 unsigned char *addr, int len)
48 u8 __iomem *base = hostdata->io;
49 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
53 writeb(0x02, base + CTRL);
54 laddr = (unsigned long *)addr;
59 status = readb(base + STAT);
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);
77 addr = (unsigned char *)laddr;
78 writeb(0x12, base + CTRL);
83 status = readb(base + STAT);
93 status = readb(base + STAT);
104 writeb(hostdata->ctrl | 0x40, base + CTRL);
111 static inline int cumanascsi_pread(struct NCR5380_hostdata *hostdata,
112 unsigned char *addr, int len)
114 unsigned long *laddr;
115 u8 __iomem *base = hostdata->io;
116 u8 __iomem *dma = hostdata->pdma_io + 0x2000;
120 writeb(0x00, base + CTRL);
121 laddr = (unsigned long *)addr;
125 status = readb(base + STAT);
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);
143 addr = (unsigned char *)laddr;
144 writeb(0x10, base + CTRL);
149 status = readb(base + STAT);
154 *addr++ = readb(dma);
159 status = readb(base + STAT);
164 *addr++ = readb(dma);
170 writeb(hostdata->ctrl | 0x40, base + CTRL);
177 static int cumanascsi_dma_xfer_len(struct NCR5380_hostdata *hostdata,
178 struct scsi_cmnd *cmd)
180 return cmd->transfersize;
183 static u8 cumanascsi_read(struct NCR5380_hostdata *hostdata,
186 u8 __iomem *base = hostdata->io;
189 writeb(0, base + CTRL);
191 val = readb(base + 0x2100 + (reg << 2));
193 hostdata->ctrl = 0x40;
194 writeb(0x40, base + CTRL);
199 static void cumanascsi_write(struct NCR5380_hostdata *hostdata,
200 unsigned int reg, u8 value)
202 u8 __iomem *base = hostdata->io;
204 writeb(0, base + CTRL);
206 writeb(value, base + 0x2100 + (reg << 2));
208 hostdata->ctrl = 0x40;
209 writeb(0x40, base + CTRL);
212 #include "../NCR5380.c"
214 static 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,
223 .sg_tablesize = SG_ALL,
225 .proc_name = "CumanaSCSI-1",
226 .cmd_size = NCR5380_CMD_SIZE,
228 .dma_boundary = PAGE_SIZE - 1,
231 static int cumanascsi1_probe(struct expansion_card *ec,
232 const struct ecard_id *id)
234 struct Scsi_Host *host;
237 ret = ecard_request_resources(ec);
241 host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
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) {
258 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
262 NCR5380_maybe_reset_bus(host);
264 priv(host)->ctrl = 0;
265 writeb(0, priv(host)->io + CTRL);
267 ret = request_irq(host->irq, cumanascsi_intr, 0,
268 "CumanaSCSI-1", host);
270 printk("scsi%d: IRQ%d not free: %d\n",
271 host->host_no, host->irq, ret);
275 ret = scsi_add_host(host, &ec->dev);
279 scsi_scan_host(host);
283 free_irq(host->irq, host);
287 iounmap(priv(host)->io);
288 iounmap(priv(host)->pdma_io);
291 ecard_release_resources(ec);
296 static void cumanascsi1_remove(struct expansion_card *ec)
298 struct Scsi_Host *host = ecard_get_drvdata(ec);
299 void __iomem *base = priv(host)->io;
300 void __iomem *dma = priv(host)->pdma_io;
302 ecard_set_drvdata(ec, NULL);
304 scsi_remove_host(host);
305 free_irq(host->irq, host);
310 ecard_release_resources(ec);
313 static const struct ecard_id cumanascsi1_cids[] = {
314 { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
318 static struct ecard_driver cumanascsi1_driver = {
319 .probe = cumanascsi1_probe,
320 .remove = cumanascsi1_remove,
321 .id_table = cumanascsi1_cids,
323 .name = "cumanascsi1",
327 static int __init cumanascsi_init(void)
329 return ecard_register_driver(&cumanascsi1_driver);
332 static void __exit cumanascsi_exit(void)
334 ecard_remove_driver(&cumanascsi1_driver);
337 module_init(cumanascsi_init);
338 module_exit(cumanascsi_exit);
340 MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
341 MODULE_LICENSE("GPL");