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 | |
820682b1 | 31 | #define NCR5380_implementation_fields int pdma_residual |
92de3831 | 32 | |
61e1ce58 FT |
33 | #define NCR5380_read(reg) in_8(hostdata->io + ((reg) << 4)) |
34 | #define NCR5380_write(reg, value) out_8(hostdata->io + ((reg) << 4), value) | |
92de3831 | 35 | |
4a98f896 | 36 | #define NCR5380_dma_xfer_len macscsi_dma_xfer_len |
6c4b88ca FT |
37 | #define NCR5380_dma_recv_setup macscsi_pread |
38 | #define NCR5380_dma_send_setup macscsi_pwrite | |
4a98f896 | 39 | #define NCR5380_dma_residual macscsi_dma_residual |
92de3831 FT |
40 | |
41 | #define NCR5380_intr macscsi_intr | |
42 | #define NCR5380_queue_command macscsi_queue_command | |
43 | #define NCR5380_abort macscsi_abort | |
12e5fc66 | 44 | #define NCR5380_host_reset macscsi_host_reset |
92de3831 | 45 | #define NCR5380_info macscsi_info |
92de3831 | 46 | |
1da177e4 LT |
47 | #include "NCR5380.h" |
48 | ||
1da177e4 | 49 | static int setup_can_queue = -1; |
6e9ae6d5 | 50 | module_param(setup_can_queue, int, 0); |
1da177e4 | 51 | static int setup_cmd_per_lun = -1; |
6e9ae6d5 | 52 | module_param(setup_cmd_per_lun, int, 0); |
1da177e4 | 53 | static int setup_sg_tablesize = -1; |
6e9ae6d5 | 54 | module_param(setup_sg_tablesize, int, 0); |
1da177e4 | 55 | static int setup_use_pdma = -1; |
6e9ae6d5 | 56 | module_param(setup_use_pdma, int, 0); |
1da177e4 | 57 | static int setup_hostid = -1; |
6e9ae6d5 | 58 | module_param(setup_hostid, int, 0); |
9c3f0e2b FT |
59 | static int setup_toshiba_delay = -1; |
60 | module_param(setup_toshiba_delay, int, 0); | |
1da177e4 | 61 | |
6e9ae6d5 FT |
62 | #ifndef MODULE |
63 | static int __init mac_scsi_setup(char *str) | |
64 | { | |
9c3f0e2b | 65 | int ints[8]; |
6e9ae6d5 FT |
66 | |
67 | (void)get_options(str, ARRAY_SIZE(ints), ints); | |
68 | ||
9c3f0e2b FT |
69 | if (ints[0] < 1) { |
70 | pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); | |
6e9ae6d5 | 71 | return 0; |
1da177e4 | 72 | } |
6e9ae6d5 FT |
73 | if (ints[0] >= 1) |
74 | setup_can_queue = ints[1]; | |
75 | if (ints[0] >= 2) | |
76 | setup_cmd_per_lun = ints[2]; | |
77 | if (ints[0] >= 3) | |
78 | setup_sg_tablesize = ints[3]; | |
79 | if (ints[0] >= 4) | |
80 | setup_hostid = ints[4]; | |
c4ec6f92 | 81 | /* ints[5] (use_tagged_queuing) is ignored */ |
6e9ae6d5 | 82 | if (ints[0] >= 6) |
1da177e4 | 83 | setup_use_pdma = ints[6]; |
9c3f0e2b FT |
84 | if (ints[0] >= 7) |
85 | setup_toshiba_delay = ints[7]; | |
1da177e4 LT |
86 | return 1; |
87 | } | |
88 | ||
89 | __setup("mac5380=", mac_scsi_setup); | |
6e9ae6d5 | 90 | #endif /* !MODULE */ |
1da177e4 | 91 | |
3a0f64bf FT |
92 | /* Pseudo DMA asm originally by Ove Edlund */ |
93 | ||
94 | #define CP_IO_TO_MEM(s,d,n) \ | |
1da177e4 LT |
95 | __asm__ __volatile__ \ |
96 | (" cmp.w #4,%2\n" \ | |
97 | " bls 8f\n" \ | |
98 | " move.w %1,%%d0\n" \ | |
99 | " neg.b %%d0\n" \ | |
100 | " and.w #3,%%d0\n" \ | |
101 | " sub.w %%d0,%2\n" \ | |
102 | " bra 2f\n" \ | |
103 | " 1: move.b (%0),(%1)+\n" \ | |
104 | " 2: dbf %%d0,1b\n" \ | |
105 | " move.w %2,%%d0\n" \ | |
106 | " lsr.w #5,%%d0\n" \ | |
107 | " bra 4f\n" \ | |
108 | " 3: move.l (%0),(%1)+\n" \ | |
109 | "31: move.l (%0),(%1)+\n" \ | |
110 | "32: move.l (%0),(%1)+\n" \ | |
111 | "33: move.l (%0),(%1)+\n" \ | |
112 | "34: move.l (%0),(%1)+\n" \ | |
113 | "35: move.l (%0),(%1)+\n" \ | |
114 | "36: move.l (%0),(%1)+\n" \ | |
115 | "37: move.l (%0),(%1)+\n" \ | |
116 | " 4: dbf %%d0,3b\n" \ | |
117 | " move.w %2,%%d0\n" \ | |
118 | " lsr.w #2,%%d0\n" \ | |
119 | " and.w #7,%%d0\n" \ | |
120 | " bra 6f\n" \ | |
121 | " 5: move.l (%0),(%1)+\n" \ | |
122 | " 6: dbf %%d0,5b\n" \ | |
123 | " and.w #3,%2\n" \ | |
124 | " bra 8f\n" \ | |
125 | " 7: move.b (%0),(%1)+\n" \ | |
126 | " 8: dbf %2,7b\n" \ | |
127 | " moveq.l #0, %2\n" \ | |
128 | " 9: \n" \ | |
129 | ".section .fixup,\"ax\"\n" \ | |
130 | " .even\n" \ | |
3a0f64bf FT |
131 | "91: moveq.l #1, %2\n" \ |
132 | " jra 9b\n" \ | |
133 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
134 | " jra 9b\n" \ |
135 | ".previous\n" \ | |
136 | ".section __ex_table,\"a\"\n" \ | |
137 | " .align 4\n" \ | |
3a0f64bf FT |
138 | " .long 1b,91b\n" \ |
139 | " .long 3b,94b\n" \ | |
140 | " .long 31b,94b\n" \ | |
141 | " .long 32b,94b\n" \ | |
142 | " .long 33b,94b\n" \ | |
143 | " .long 34b,94b\n" \ | |
144 | " .long 35b,94b\n" \ | |
145 | " .long 36b,94b\n" \ | |
146 | " .long 37b,94b\n" \ | |
147 | " .long 5b,94b\n" \ | |
148 | " .long 7b,91b\n" \ | |
1da177e4 | 149 | ".previous" \ |
3a0f64bf FT |
150 | : "=a"(s), "=a"(d), "=d"(n) \ |
151 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
152 | : "d0") |
153 | ||
4a98f896 FT |
154 | static inline int macscsi_pread(struct NCR5380_hostdata *hostdata, |
155 | unsigned char *dst, int len) | |
1da177e4 | 156 | { |
4ab2a787 | 157 | u8 __iomem *s = hostdata->pdma_io + (INPUT_DATA_REG << 4); |
3a0f64bf FT |
158 | unsigned char *d = dst; |
159 | int n = len; | |
160 | int transferred; | |
161 | ||
d5d37a0a | 162 | while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, |
3a0f64bf FT |
163 | BASR_DRQ | BASR_PHASE_MATCH, |
164 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
165 | CP_IO_TO_MEM(s, d, n); | |
166 | ||
167 | transferred = d - dst - n; | |
168 | hostdata->pdma_residual = len - transferred; | |
169 | ||
170 | /* No bus error. */ | |
171 | if (n == 0) | |
172 | return 0; | |
173 | ||
174 | /* Target changed phase early? */ | |
d5d37a0a | 175 | if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ, |
3a0f64bf FT |
176 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) |
177 | scmd_printk(KERN_ERR, hostdata->connected, | |
178 | "%s: !REQ and !ACK\n", __func__); | |
179 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
180 | return 0; | |
181 | ||
4a98f896 | 182 | dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host, |
3a0f64bf | 183 | "%s: bus error (%d/%d)\n", __func__, transferred, len); |
4a98f896 | 184 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf FT |
185 | d = dst + transferred; |
186 | n = len - transferred; | |
ffdede67 FT |
187 | } |
188 | ||
3a0f64bf FT |
189 | scmd_printk(KERN_ERR, hostdata->connected, |
190 | "%s: phase mismatch or !DRQ\n", __func__); | |
4a98f896 | 191 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf | 192 | return -1; |
1da177e4 LT |
193 | } |
194 | ||
195 | ||
3a0f64bf | 196 | #define CP_MEM_TO_IO(s,d,n) \ |
1da177e4 LT |
197 | __asm__ __volatile__ \ |
198 | (" cmp.w #4,%2\n" \ | |
199 | " bls 8f\n" \ | |
200 | " move.w %0,%%d0\n" \ | |
201 | " neg.b %%d0\n" \ | |
202 | " and.w #3,%%d0\n" \ | |
203 | " sub.w %%d0,%2\n" \ | |
204 | " bra 2f\n" \ | |
205 | " 1: move.b (%0)+,(%1)\n" \ | |
206 | " 2: dbf %%d0,1b\n" \ | |
207 | " move.w %2,%%d0\n" \ | |
208 | " lsr.w #5,%%d0\n" \ | |
209 | " bra 4f\n" \ | |
210 | " 3: move.l (%0)+,(%1)\n" \ | |
211 | "31: move.l (%0)+,(%1)\n" \ | |
212 | "32: move.l (%0)+,(%1)\n" \ | |
213 | "33: move.l (%0)+,(%1)\n" \ | |
214 | "34: move.l (%0)+,(%1)\n" \ | |
215 | "35: move.l (%0)+,(%1)\n" \ | |
216 | "36: move.l (%0)+,(%1)\n" \ | |
217 | "37: move.l (%0)+,(%1)\n" \ | |
218 | " 4: dbf %%d0,3b\n" \ | |
219 | " move.w %2,%%d0\n" \ | |
220 | " lsr.w #2,%%d0\n" \ | |
221 | " and.w #7,%%d0\n" \ | |
222 | " bra 6f\n" \ | |
223 | " 5: move.l (%0)+,(%1)\n" \ | |
224 | " 6: dbf %%d0,5b\n" \ | |
225 | " and.w #3,%2\n" \ | |
226 | " bra 8f\n" \ | |
227 | " 7: move.b (%0)+,(%1)\n" \ | |
228 | " 8: dbf %2,7b\n" \ | |
229 | " moveq.l #0, %2\n" \ | |
230 | " 9: \n" \ | |
231 | ".section .fixup,\"ax\"\n" \ | |
232 | " .even\n" \ | |
3a0f64bf FT |
233 | "91: moveq.l #1, %2\n" \ |
234 | " jra 9b\n" \ | |
235 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
236 | " jra 9b\n" \ |
237 | ".previous\n" \ | |
238 | ".section __ex_table,\"a\"\n" \ | |
239 | " .align 4\n" \ | |
3a0f64bf FT |
240 | " .long 1b,91b\n" \ |
241 | " .long 3b,94b\n" \ | |
242 | " .long 31b,94b\n" \ | |
243 | " .long 32b,94b\n" \ | |
244 | " .long 33b,94b\n" \ | |
245 | " .long 34b,94b\n" \ | |
246 | " .long 35b,94b\n" \ | |
247 | " .long 36b,94b\n" \ | |
248 | " .long 37b,94b\n" \ | |
249 | " .long 5b,94b\n" \ | |
250 | " .long 7b,91b\n" \ | |
1da177e4 | 251 | ".previous" \ |
3a0f64bf FT |
252 | : "=a"(s), "=a"(d), "=d"(n) \ |
253 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
254 | : "d0") |
255 | ||
4a98f896 FT |
256 | static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata, |
257 | unsigned char *src, int len) | |
1da177e4 | 258 | { |
3a0f64bf | 259 | unsigned char *s = src; |
4ab2a787 | 260 | u8 __iomem *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4); |
3a0f64bf FT |
261 | int n = len; |
262 | int transferred; | |
263 | ||
d5d37a0a | 264 | while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, |
3a0f64bf FT |
265 | BASR_DRQ | BASR_PHASE_MATCH, |
266 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
267 | CP_MEM_TO_IO(s, d, n); | |
268 | ||
269 | transferred = s - src - n; | |
270 | hostdata->pdma_residual = len - transferred; | |
271 | ||
272 | /* Target changed phase early? */ | |
d5d37a0a | 273 | if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ, |
3a0f64bf FT |
274 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) |
275 | scmd_printk(KERN_ERR, hostdata->connected, | |
276 | "%s: !REQ and !ACK\n", __func__); | |
277 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
278 | return 0; | |
279 | ||
280 | /* No bus error. */ | |
281 | if (n == 0) { | |
d5d37a0a | 282 | if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG, |
3a0f64bf FT |
283 | TCR_LAST_BYTE_SENT, |
284 | TCR_LAST_BYTE_SENT, HZ / 64) < 0) | |
285 | scmd_printk(KERN_ERR, hostdata->connected, | |
286 | "%s: Last Byte Sent timeout\n", __func__); | |
287 | return 0; | |
288 | } | |
289 | ||
4a98f896 | 290 | dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host, |
3a0f64bf | 291 | "%s: bus error (%d/%d)\n", __func__, transferred, len); |
4a98f896 | 292 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf FT |
293 | s = src + transferred; |
294 | n = len - transferred; | |
ffdede67 FT |
295 | } |
296 | ||
3a0f64bf FT |
297 | scmd_printk(KERN_ERR, hostdata->connected, |
298 | "%s: phase mismatch or !DRQ\n", __func__); | |
4a98f896 | 299 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
ffdede67 | 300 | |
3a0f64bf | 301 | return -1; |
ffdede67 | 302 | } |
1da177e4 | 303 | |
4a98f896 | 304 | static int macscsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, |
7e9ec8d9 FT |
305 | struct scsi_cmnd *cmd) |
306 | { | |
3a0f64bf FT |
307 | if (hostdata->flags & FLAG_NO_PSEUDO_DMA || |
308 | cmd->SCp.this_residual < 16) | |
7e9ec8d9 FT |
309 | return 0; |
310 | ||
3a0f64bf | 311 | return cmd->SCp.this_residual; |
7e9ec8d9 FT |
312 | } |
313 | ||
4a98f896 FT |
314 | static int macscsi_dma_residual(struct NCR5380_hostdata *hostdata) |
315 | { | |
316 | return hostdata->pdma_residual; | |
317 | } | |
318 | ||
1da177e4 LT |
319 | #include "NCR5380.c" |
320 | ||
cbad48de FT |
321 | #define DRV_MODULE_NAME "mac_scsi" |
322 | #define PFX DRV_MODULE_NAME ": " | |
323 | ||
324 | static struct scsi_host_template mac_scsi_template = { | |
aa2e2cb1 FT |
325 | .module = THIS_MODULE, |
326 | .proc_name = DRV_MODULE_NAME, | |
aa2e2cb1 FT |
327 | .name = "Macintosh NCR5380 SCSI", |
328 | .info = macscsi_info, | |
329 | .queuecommand = macscsi_queue_command, | |
330 | .eh_abort_handler = macscsi_abort, | |
12e5fc66 | 331 | .eh_host_reset_handler = macscsi_host_reset, |
aa2e2cb1 FT |
332 | .can_queue = 16, |
333 | .this_id = 7, | |
3a0f64bf | 334 | .sg_tablesize = 1, |
aa2e2cb1 FT |
335 | .cmd_per_lun = 2, |
336 | .use_clustering = DISABLE_CLUSTERING, | |
32b26a10 | 337 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 338 | .max_sectors = 128, |
1da177e4 LT |
339 | }; |
340 | ||
cbad48de FT |
341 | static int __init mac_scsi_probe(struct platform_device *pdev) |
342 | { | |
343 | struct Scsi_Host *instance; | |
820682b1 | 344 | struct NCR5380_hostdata *hostdata; |
cbad48de FT |
345 | int error; |
346 | int host_flags = 0; | |
347 | struct resource *irq, *pio_mem, *pdma_mem = NULL; | |
348 | ||
349 | pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
350 | if (!pio_mem) | |
351 | return -ENODEV; | |
352 | ||
cbad48de | 353 | pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
cbad48de FT |
354 | |
355 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
356 | ||
357 | if (!hwreg_present((unsigned char *)pio_mem->start + | |
358 | (STATUS_REG << 4))) { | |
359 | pr_info(PFX "no device detected at %pap\n", &pio_mem->start); | |
360 | return -ENODEV; | |
361 | } | |
362 | ||
363 | if (setup_can_queue > 0) | |
364 | mac_scsi_template.can_queue = setup_can_queue; | |
365 | if (setup_cmd_per_lun > 0) | |
366 | mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; | |
367 | if (setup_sg_tablesize >= 0) | |
368 | mac_scsi_template.sg_tablesize = setup_sg_tablesize; | |
369 | if (setup_hostid >= 0) | |
370 | mac_scsi_template.this_id = setup_hostid & 7; | |
cbad48de FT |
371 | |
372 | instance = scsi_host_alloc(&mac_scsi_template, | |
373 | sizeof(struct NCR5380_hostdata)); | |
374 | if (!instance) | |
375 | return -ENOMEM; | |
376 | ||
cbad48de FT |
377 | if (irq) |
378 | instance->irq = irq->start; | |
379 | else | |
380 | instance->irq = NO_IRQ; | |
381 | ||
820682b1 FT |
382 | hostdata = shost_priv(instance); |
383 | hostdata->base = pio_mem->start; | |
4ab2a787 | 384 | hostdata->io = (u8 __iomem *)pio_mem->start; |
cbad48de | 385 | |
820682b1 | 386 | if (pdma_mem && setup_use_pdma) |
4ab2a787 | 387 | hostdata->pdma_io = (u8 __iomem *)pdma_mem->start; |
820682b1 | 388 | else |
cbad48de FT |
389 | host_flags |= FLAG_NO_PSEUDO_DMA; |
390 | ||
9c3f0e2b | 391 | host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; |
ca513fc9 | 392 | |
8053b0ee | 393 | error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP); |
0ad0eff9 FT |
394 | if (error) |
395 | goto fail_init; | |
cbad48de FT |
396 | |
397 | if (instance->irq != NO_IRQ) { | |
398 | error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, | |
399 | "NCR5380", instance); | |
400 | if (error) | |
401 | goto fail_irq; | |
402 | } | |
403 | ||
9c3f0e2b FT |
404 | NCR5380_maybe_reset_bus(instance); |
405 | ||
cbad48de FT |
406 | error = scsi_add_host(instance, NULL); |
407 | if (error) | |
408 | goto fail_host; | |
409 | ||
410 | platform_set_drvdata(pdev, instance); | |
411 | ||
412 | scsi_scan_host(instance); | |
413 | return 0; | |
414 | ||
415 | fail_host: | |
416 | if (instance->irq != NO_IRQ) | |
417 | free_irq(instance->irq, instance); | |
418 | fail_irq: | |
419 | NCR5380_exit(instance); | |
0ad0eff9 | 420 | fail_init: |
cbad48de FT |
421 | scsi_host_put(instance); |
422 | return error; | |
423 | } | |
424 | ||
425 | static int __exit mac_scsi_remove(struct platform_device *pdev) | |
426 | { | |
427 | struct Scsi_Host *instance = platform_get_drvdata(pdev); | |
428 | ||
429 | scsi_remove_host(instance); | |
430 | if (instance->irq != NO_IRQ) | |
431 | free_irq(instance->irq, instance); | |
432 | NCR5380_exit(instance); | |
433 | scsi_host_put(instance); | |
434 | return 0; | |
435 | } | |
436 | ||
437 | static struct platform_driver mac_scsi_driver = { | |
438 | .remove = __exit_p(mac_scsi_remove), | |
439 | .driver = { | |
440 | .name = DRV_MODULE_NAME, | |
cbad48de FT |
441 | }, |
442 | }; | |
1da177e4 | 443 | |
cbad48de | 444 | module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); |
6e9ae6d5 | 445 | |
cbad48de | 446 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6e9ae6d5 | 447 | MODULE_LICENSE("GPL"); |