Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Generic Macintosh NCR5380 driver | |
3 | * | |
4 | * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> | |
5 | * | |
6 | * derived in part from: | |
7 | */ | |
8 | /* | |
9 | * Generic Generic NCR5380 driver | |
10 | * | |
11 | * Copyright 1995, Russell King | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 | 14 | #include <linux/types.h> |
1da177e4 | 15 | #include <linux/module.h> |
1da177e4 LT |
16 | #include <linux/ioport.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/interrupt.h> | |
cbad48de | 20 | #include <linux/platform_device.h> |
1da177e4 | 21 | |
cbad48de | 22 | #include <asm/hwtest.h> |
1da177e4 | 23 | #include <asm/io.h> |
1da177e4 | 24 | #include <asm/macints.h> |
cbad48de | 25 | #include <asm/setup.h> |
1da177e4 | 26 | |
1da177e4 | 27 | #include <scsi/scsi_host.h> |
92de3831 FT |
28 | |
29 | /* Definitions for the core NCR5380 driver. */ | |
e744fdea | 30 | |
3a0f64bf FT |
31 | #define NCR5380_implementation_fields unsigned char *pdma_base; \ |
32 | int pdma_residual | |
92de3831 | 33 | |
54d8fe44 FT |
34 | #define NCR5380_read(reg) macscsi_read(instance, reg) |
35 | #define NCR5380_write(reg, value) macscsi_write(instance, reg, value) | |
92de3831 | 36 | |
7e9ec8d9 FT |
37 | #define NCR5380_dma_xfer_len(instance, cmd, phase) \ |
38 | macscsi_dma_xfer_len(instance, cmd) | |
6c4b88ca FT |
39 | #define NCR5380_dma_recv_setup macscsi_pread |
40 | #define NCR5380_dma_send_setup macscsi_pwrite | |
3a0f64bf | 41 | #define NCR5380_dma_residual(instance) (hostdata->pdma_residual) |
92de3831 FT |
42 | |
43 | #define NCR5380_intr macscsi_intr | |
44 | #define NCR5380_queue_command macscsi_queue_command | |
45 | #define NCR5380_abort macscsi_abort | |
46 | #define NCR5380_bus_reset macscsi_bus_reset | |
47 | #define NCR5380_info macscsi_info | |
92de3831 | 48 | |
1da177e4 LT |
49 | #include "NCR5380.h" |
50 | ||
1da177e4 | 51 | static int setup_can_queue = -1; |
6e9ae6d5 | 52 | module_param(setup_can_queue, int, 0); |
1da177e4 | 53 | static int setup_cmd_per_lun = -1; |
6e9ae6d5 | 54 | module_param(setup_cmd_per_lun, int, 0); |
1da177e4 | 55 | static int setup_sg_tablesize = -1; |
6e9ae6d5 | 56 | module_param(setup_sg_tablesize, int, 0); |
1da177e4 | 57 | static int setup_use_pdma = -1; |
6e9ae6d5 | 58 | module_param(setup_use_pdma, int, 0); |
1da177e4 | 59 | static int setup_hostid = -1; |
6e9ae6d5 | 60 | module_param(setup_hostid, int, 0); |
9c3f0e2b FT |
61 | static int setup_toshiba_delay = -1; |
62 | module_param(setup_toshiba_delay, int, 0); | |
1da177e4 | 63 | |
1da177e4 LT |
64 | /* |
65 | * NCR 5380 register access functions | |
66 | */ | |
67 | ||
cbad48de | 68 | static inline char macscsi_read(struct Scsi_Host *instance, int reg) |
1da177e4 | 69 | { |
cbad48de | 70 | return in_8(instance->base + (reg << 4)); |
1da177e4 LT |
71 | } |
72 | ||
cbad48de | 73 | static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
1da177e4 | 74 | { |
cbad48de | 75 | out_8(instance->base + (reg << 4), value); |
1da177e4 | 76 | } |
1da177e4 | 77 | |
6e9ae6d5 FT |
78 | #ifndef MODULE |
79 | static int __init mac_scsi_setup(char *str) | |
80 | { | |
9c3f0e2b | 81 | int ints[8]; |
6e9ae6d5 FT |
82 | |
83 | (void)get_options(str, ARRAY_SIZE(ints), ints); | |
84 | ||
9c3f0e2b FT |
85 | if (ints[0] < 1) { |
86 | pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); | |
6e9ae6d5 | 87 | return 0; |
1da177e4 | 88 | } |
6e9ae6d5 FT |
89 | if (ints[0] >= 1) |
90 | setup_can_queue = ints[1]; | |
91 | if (ints[0] >= 2) | |
92 | setup_cmd_per_lun = ints[2]; | |
93 | if (ints[0] >= 3) | |
94 | setup_sg_tablesize = ints[3]; | |
95 | if (ints[0] >= 4) | |
96 | setup_hostid = ints[4]; | |
c4ec6f92 | 97 | /* ints[5] (use_tagged_queuing) is ignored */ |
6e9ae6d5 | 98 | if (ints[0] >= 6) |
1da177e4 | 99 | setup_use_pdma = ints[6]; |
9c3f0e2b FT |
100 | if (ints[0] >= 7) |
101 | setup_toshiba_delay = ints[7]; | |
1da177e4 LT |
102 | return 1; |
103 | } | |
104 | ||
105 | __setup("mac5380=", mac_scsi_setup); | |
6e9ae6d5 | 106 | #endif /* !MODULE */ |
1da177e4 | 107 | |
3a0f64bf FT |
108 | /* Pseudo DMA asm originally by Ove Edlund */ |
109 | ||
110 | #define CP_IO_TO_MEM(s,d,n) \ | |
1da177e4 LT |
111 | __asm__ __volatile__ \ |
112 | (" cmp.w #4,%2\n" \ | |
113 | " bls 8f\n" \ | |
114 | " move.w %1,%%d0\n" \ | |
115 | " neg.b %%d0\n" \ | |
116 | " and.w #3,%%d0\n" \ | |
117 | " sub.w %%d0,%2\n" \ | |
118 | " bra 2f\n" \ | |
119 | " 1: move.b (%0),(%1)+\n" \ | |
120 | " 2: dbf %%d0,1b\n" \ | |
121 | " move.w %2,%%d0\n" \ | |
122 | " lsr.w #5,%%d0\n" \ | |
123 | " bra 4f\n" \ | |
124 | " 3: move.l (%0),(%1)+\n" \ | |
125 | "31: move.l (%0),(%1)+\n" \ | |
126 | "32: move.l (%0),(%1)+\n" \ | |
127 | "33: move.l (%0),(%1)+\n" \ | |
128 | "34: move.l (%0),(%1)+\n" \ | |
129 | "35: move.l (%0),(%1)+\n" \ | |
130 | "36: move.l (%0),(%1)+\n" \ | |
131 | "37: move.l (%0),(%1)+\n" \ | |
132 | " 4: dbf %%d0,3b\n" \ | |
133 | " move.w %2,%%d0\n" \ | |
134 | " lsr.w #2,%%d0\n" \ | |
135 | " and.w #7,%%d0\n" \ | |
136 | " bra 6f\n" \ | |
137 | " 5: move.l (%0),(%1)+\n" \ | |
138 | " 6: dbf %%d0,5b\n" \ | |
139 | " and.w #3,%2\n" \ | |
140 | " bra 8f\n" \ | |
141 | " 7: move.b (%0),(%1)+\n" \ | |
142 | " 8: dbf %2,7b\n" \ | |
143 | " moveq.l #0, %2\n" \ | |
144 | " 9: \n" \ | |
145 | ".section .fixup,\"ax\"\n" \ | |
146 | " .even\n" \ | |
3a0f64bf FT |
147 | "91: moveq.l #1, %2\n" \ |
148 | " jra 9b\n" \ | |
149 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
150 | " jra 9b\n" \ |
151 | ".previous\n" \ | |
152 | ".section __ex_table,\"a\"\n" \ | |
153 | " .align 4\n" \ | |
3a0f64bf FT |
154 | " .long 1b,91b\n" \ |
155 | " .long 3b,94b\n" \ | |
156 | " .long 31b,94b\n" \ | |
157 | " .long 32b,94b\n" \ | |
158 | " .long 33b,94b\n" \ | |
159 | " .long 34b,94b\n" \ | |
160 | " .long 35b,94b\n" \ | |
161 | " .long 36b,94b\n" \ | |
162 | " .long 37b,94b\n" \ | |
163 | " .long 5b,94b\n" \ | |
164 | " .long 7b,91b\n" \ | |
1da177e4 | 165 | ".previous" \ |
3a0f64bf FT |
166 | : "=a"(s), "=a"(d), "=d"(n) \ |
167 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
168 | : "d0") |
169 | ||
ffdede67 FT |
170 | static int macscsi_pread(struct Scsi_Host *instance, |
171 | unsigned char *dst, int len) | |
1da177e4 | 172 | { |
cbad48de | 173 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
3a0f64bf FT |
174 | unsigned char *s = hostdata->pdma_base + (INPUT_DATA_REG << 4); |
175 | unsigned char *d = dst; | |
176 | int n = len; | |
177 | int transferred; | |
178 | ||
179 | while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, | |
180 | BASR_DRQ | BASR_PHASE_MATCH, | |
181 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
182 | CP_IO_TO_MEM(s, d, n); | |
183 | ||
184 | transferred = d - dst - n; | |
185 | hostdata->pdma_residual = len - transferred; | |
186 | ||
187 | /* No bus error. */ | |
188 | if (n == 0) | |
189 | return 0; | |
190 | ||
191 | /* Target changed phase early? */ | |
192 | if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ, | |
193 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) | |
194 | scmd_printk(KERN_ERR, hostdata->connected, | |
195 | "%s: !REQ and !ACK\n", __func__); | |
196 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
197 | return 0; | |
198 | ||
199 | dsprintk(NDEBUG_PSEUDO_DMA, instance, | |
200 | "%s: bus error (%d/%d)\n", __func__, transferred, len); | |
201 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance); | |
202 | d = dst + transferred; | |
203 | n = len - transferred; | |
ffdede67 FT |
204 | } |
205 | ||
3a0f64bf FT |
206 | scmd_printk(KERN_ERR, hostdata->connected, |
207 | "%s: phase mismatch or !DRQ\n", __func__); | |
208 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance); | |
209 | return -1; | |
1da177e4 LT |
210 | } |
211 | ||
212 | ||
3a0f64bf | 213 | #define CP_MEM_TO_IO(s,d,n) \ |
1da177e4 LT |
214 | __asm__ __volatile__ \ |
215 | (" cmp.w #4,%2\n" \ | |
216 | " bls 8f\n" \ | |
217 | " move.w %0,%%d0\n" \ | |
218 | " neg.b %%d0\n" \ | |
219 | " and.w #3,%%d0\n" \ | |
220 | " sub.w %%d0,%2\n" \ | |
221 | " bra 2f\n" \ | |
222 | " 1: move.b (%0)+,(%1)\n" \ | |
223 | " 2: dbf %%d0,1b\n" \ | |
224 | " move.w %2,%%d0\n" \ | |
225 | " lsr.w #5,%%d0\n" \ | |
226 | " bra 4f\n" \ | |
227 | " 3: move.l (%0)+,(%1)\n" \ | |
228 | "31: move.l (%0)+,(%1)\n" \ | |
229 | "32: move.l (%0)+,(%1)\n" \ | |
230 | "33: move.l (%0)+,(%1)\n" \ | |
231 | "34: move.l (%0)+,(%1)\n" \ | |
232 | "35: move.l (%0)+,(%1)\n" \ | |
233 | "36: move.l (%0)+,(%1)\n" \ | |
234 | "37: move.l (%0)+,(%1)\n" \ | |
235 | " 4: dbf %%d0,3b\n" \ | |
236 | " move.w %2,%%d0\n" \ | |
237 | " lsr.w #2,%%d0\n" \ | |
238 | " and.w #7,%%d0\n" \ | |
239 | " bra 6f\n" \ | |
240 | " 5: move.l (%0)+,(%1)\n" \ | |
241 | " 6: dbf %%d0,5b\n" \ | |
242 | " and.w #3,%2\n" \ | |
243 | " bra 8f\n" \ | |
244 | " 7: move.b (%0)+,(%1)\n" \ | |
245 | " 8: dbf %2,7b\n" \ | |
246 | " moveq.l #0, %2\n" \ | |
247 | " 9: \n" \ | |
248 | ".section .fixup,\"ax\"\n" \ | |
249 | " .even\n" \ | |
3a0f64bf FT |
250 | "91: moveq.l #1, %2\n" \ |
251 | " jra 9b\n" \ | |
252 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
253 | " jra 9b\n" \ |
254 | ".previous\n" \ | |
255 | ".section __ex_table,\"a\"\n" \ | |
256 | " .align 4\n" \ | |
3a0f64bf FT |
257 | " .long 1b,91b\n" \ |
258 | " .long 3b,94b\n" \ | |
259 | " .long 31b,94b\n" \ | |
260 | " .long 32b,94b\n" \ | |
261 | " .long 33b,94b\n" \ | |
262 | " .long 34b,94b\n" \ | |
263 | " .long 35b,94b\n" \ | |
264 | " .long 36b,94b\n" \ | |
265 | " .long 37b,94b\n" \ | |
266 | " .long 5b,94b\n" \ | |
267 | " .long 7b,91b\n" \ | |
1da177e4 | 268 | ".previous" \ |
3a0f64bf FT |
269 | : "=a"(s), "=a"(d), "=d"(n) \ |
270 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
271 | : "d0") |
272 | ||
ffdede67 FT |
273 | static int macscsi_pwrite(struct Scsi_Host *instance, |
274 | unsigned char *src, int len) | |
1da177e4 | 275 | { |
cbad48de | 276 | struct NCR5380_hostdata *hostdata = shost_priv(instance); |
3a0f64bf FT |
277 | unsigned char *s = src; |
278 | unsigned char *d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4); | |
279 | int n = len; | |
280 | int transferred; | |
281 | ||
282 | while (!NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, | |
283 | BASR_DRQ | BASR_PHASE_MATCH, | |
284 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
285 | CP_MEM_TO_IO(s, d, n); | |
286 | ||
287 | transferred = s - src - n; | |
288 | hostdata->pdma_residual = len - transferred; | |
289 | ||
290 | /* Target changed phase early? */ | |
291 | if (NCR5380_poll_politely2(instance, STATUS_REG, SR_REQ, SR_REQ, | |
292 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) | |
293 | scmd_printk(KERN_ERR, hostdata->connected, | |
294 | "%s: !REQ and !ACK\n", __func__); | |
295 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
296 | return 0; | |
297 | ||
298 | /* No bus error. */ | |
299 | if (n == 0) { | |
300 | if (NCR5380_poll_politely(instance, TARGET_COMMAND_REG, | |
301 | TCR_LAST_BYTE_SENT, | |
302 | TCR_LAST_BYTE_SENT, HZ / 64) < 0) | |
303 | scmd_printk(KERN_ERR, hostdata->connected, | |
304 | "%s: Last Byte Sent timeout\n", __func__); | |
305 | return 0; | |
306 | } | |
307 | ||
308 | dsprintk(NDEBUG_PSEUDO_DMA, instance, | |
309 | "%s: bus error (%d/%d)\n", __func__, transferred, len); | |
310 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance); | |
311 | s = src + transferred; | |
312 | n = len - transferred; | |
ffdede67 FT |
313 | } |
314 | ||
3a0f64bf FT |
315 | scmd_printk(KERN_ERR, hostdata->connected, |
316 | "%s: phase mismatch or !DRQ\n", __func__); | |
317 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, instance); | |
ffdede67 | 318 | |
3a0f64bf | 319 | return -1; |
ffdede67 | 320 | } |
1da177e4 | 321 | |
7e9ec8d9 FT |
322 | static int macscsi_dma_xfer_len(struct Scsi_Host *instance, |
323 | struct scsi_cmnd *cmd) | |
324 | { | |
325 | struct NCR5380_hostdata *hostdata = shost_priv(instance); | |
326 | ||
3a0f64bf FT |
327 | if (hostdata->flags & FLAG_NO_PSEUDO_DMA || |
328 | cmd->SCp.this_residual < 16) | |
7e9ec8d9 FT |
329 | return 0; |
330 | ||
3a0f64bf | 331 | return cmd->SCp.this_residual; |
7e9ec8d9 FT |
332 | } |
333 | ||
1da177e4 LT |
334 | #include "NCR5380.c" |
335 | ||
cbad48de FT |
336 | #define DRV_MODULE_NAME "mac_scsi" |
337 | #define PFX DRV_MODULE_NAME ": " | |
338 | ||
339 | static struct scsi_host_template mac_scsi_template = { | |
aa2e2cb1 FT |
340 | .module = THIS_MODULE, |
341 | .proc_name = DRV_MODULE_NAME, | |
aa2e2cb1 FT |
342 | .name = "Macintosh NCR5380 SCSI", |
343 | .info = macscsi_info, | |
344 | .queuecommand = macscsi_queue_command, | |
345 | .eh_abort_handler = macscsi_abort, | |
346 | .eh_bus_reset_handler = macscsi_bus_reset, | |
347 | .can_queue = 16, | |
348 | .this_id = 7, | |
3a0f64bf | 349 | .sg_tablesize = 1, |
aa2e2cb1 FT |
350 | .cmd_per_lun = 2, |
351 | .use_clustering = DISABLE_CLUSTERING, | |
32b26a10 | 352 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 353 | .max_sectors = 128, |
1da177e4 LT |
354 | }; |
355 | ||
cbad48de FT |
356 | static int __init mac_scsi_probe(struct platform_device *pdev) |
357 | { | |
358 | struct Scsi_Host *instance; | |
359 | int error; | |
360 | int host_flags = 0; | |
361 | struct resource *irq, *pio_mem, *pdma_mem = NULL; | |
362 | ||
363 | pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
364 | if (!pio_mem) | |
365 | return -ENODEV; | |
366 | ||
cbad48de | 367 | pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
cbad48de FT |
368 | |
369 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
370 | ||
371 | if (!hwreg_present((unsigned char *)pio_mem->start + | |
372 | (STATUS_REG << 4))) { | |
373 | pr_info(PFX "no device detected at %pap\n", &pio_mem->start); | |
374 | return -ENODEV; | |
375 | } | |
376 | ||
377 | if (setup_can_queue > 0) | |
378 | mac_scsi_template.can_queue = setup_can_queue; | |
379 | if (setup_cmd_per_lun > 0) | |
380 | mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; | |
381 | if (setup_sg_tablesize >= 0) | |
382 | mac_scsi_template.sg_tablesize = setup_sg_tablesize; | |
383 | if (setup_hostid >= 0) | |
384 | mac_scsi_template.this_id = setup_hostid & 7; | |
cbad48de FT |
385 | |
386 | instance = scsi_host_alloc(&mac_scsi_template, | |
387 | sizeof(struct NCR5380_hostdata)); | |
388 | if (!instance) | |
389 | return -ENOMEM; | |
390 | ||
391 | instance->base = pio_mem->start; | |
392 | if (irq) | |
393 | instance->irq = irq->start; | |
394 | else | |
395 | instance->irq = NO_IRQ; | |
396 | ||
397 | if (pdma_mem && setup_use_pdma) { | |
398 | struct NCR5380_hostdata *hostdata = shost_priv(instance); | |
399 | ||
400 | hostdata->pdma_base = (unsigned char *)pdma_mem->start; | |
401 | } else | |
402 | host_flags |= FLAG_NO_PSEUDO_DMA; | |
403 | ||
9c3f0e2b | 404 | host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; |
ca513fc9 | 405 | |
8053b0ee | 406 | error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP); |
0ad0eff9 FT |
407 | if (error) |
408 | goto fail_init; | |
cbad48de FT |
409 | |
410 | if (instance->irq != NO_IRQ) { | |
411 | error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, | |
412 | "NCR5380", instance); | |
413 | if (error) | |
414 | goto fail_irq; | |
415 | } | |
416 | ||
9c3f0e2b FT |
417 | NCR5380_maybe_reset_bus(instance); |
418 | ||
cbad48de FT |
419 | error = scsi_add_host(instance, NULL); |
420 | if (error) | |
421 | goto fail_host; | |
422 | ||
423 | platform_set_drvdata(pdev, instance); | |
424 | ||
425 | scsi_scan_host(instance); | |
426 | return 0; | |
427 | ||
428 | fail_host: | |
429 | if (instance->irq != NO_IRQ) | |
430 | free_irq(instance->irq, instance); | |
431 | fail_irq: | |
432 | NCR5380_exit(instance); | |
0ad0eff9 | 433 | fail_init: |
cbad48de FT |
434 | scsi_host_put(instance); |
435 | return error; | |
436 | } | |
437 | ||
438 | static int __exit mac_scsi_remove(struct platform_device *pdev) | |
439 | { | |
440 | struct Scsi_Host *instance = platform_get_drvdata(pdev); | |
441 | ||
442 | scsi_remove_host(instance); | |
443 | if (instance->irq != NO_IRQ) | |
444 | free_irq(instance->irq, instance); | |
445 | NCR5380_exit(instance); | |
446 | scsi_host_put(instance); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static struct platform_driver mac_scsi_driver = { | |
451 | .remove = __exit_p(mac_scsi_remove), | |
452 | .driver = { | |
453 | .name = DRV_MODULE_NAME, | |
cbad48de FT |
454 | }, |
455 | }; | |
1da177e4 | 456 | |
cbad48de | 457 | module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); |
6e9ae6d5 | 458 | |
cbad48de | 459 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6e9ae6d5 | 460 | MODULE_LICENSE("GPL"); |