Commit | Line | Data |
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6fe07aaf FT |
1 | /* mac_esp.c: ESP front-end for Macintosh Quadra systems. |
2 | * | |
3 | * Adapted from jazz_esp.c and the old mac_esp.c. | |
4 | * | |
5 | * The pseudo DMA algorithm is based on the one used in NetBSD. | |
6 | * See sys/arch/mac68k/obio/esp.c for some background information. | |
7 | * | |
8 | * Copyright (C) 2007-2008 Finn Thain | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/dma-mapping.h> | |
18 | #include <linux/scatterlist.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/nubus.h> | |
22 | ||
23 | #include <asm/irq.h> | |
24 | #include <asm/dma.h> | |
25 | ||
26 | #include <asm/macints.h> | |
27 | #include <asm/macintosh.h> | |
28 | ||
29 | #include <scsi/scsi_host.h> | |
30 | ||
31 | #include "esp_scsi.h" | |
32 | ||
33 | #define DRV_MODULE_NAME "mac_esp" | |
34 | #define PFX DRV_MODULE_NAME ": " | |
35 | #define DRV_VERSION "1.000" | |
36 | #define DRV_MODULE_RELDATE "Sept 15, 2007" | |
37 | ||
38 | #define MAC_ESP_IO_BASE 0x50F00000 | |
39 | #define MAC_ESP_REGS_QUADRA (MAC_ESP_IO_BASE + 0x10000) | |
40 | #define MAC_ESP_REGS_QUADRA2 (MAC_ESP_IO_BASE + 0xF000) | |
41 | #define MAC_ESP_REGS_QUADRA3 (MAC_ESP_IO_BASE + 0x18000) | |
42 | #define MAC_ESP_REGS_SPACING 0x402 | |
43 | #define MAC_ESP_PDMA_REG 0xF9800024 | |
44 | #define MAC_ESP_PDMA_REG_SPACING 0x4 | |
45 | #define MAC_ESP_PDMA_IO_OFFSET 0x100 | |
46 | ||
47 | #define esp_read8(REG) mac_esp_read8(esp, REG) | |
48 | #define esp_write8(VAL, REG) mac_esp_write8(esp, VAL, REG) | |
49 | ||
50 | struct mac_esp_priv { | |
51 | struct esp *esp; | |
52 | void __iomem *pdma_regs; | |
53 | void __iomem *pdma_io; | |
54 | int error; | |
55 | }; | |
da244654 FT |
56 | static struct platform_device *internal_pdev, *external_pdev; |
57 | static struct esp *esp_chips[2]; | |
6fe07aaf FT |
58 | |
59 | #define MAC_ESP_GET_PRIV(esp) ((struct mac_esp_priv *) \ | |
60 | platform_get_drvdata((struct platform_device *) \ | |
61 | (esp->dev))) | |
62 | ||
63 | static inline void mac_esp_write8(struct esp *esp, u8 val, unsigned long reg) | |
64 | { | |
65 | nubus_writeb(val, esp->regs + reg * 16); | |
66 | } | |
67 | ||
68 | static inline u8 mac_esp_read8(struct esp *esp, unsigned long reg) | |
69 | { | |
70 | return nubus_readb(esp->regs + reg * 16); | |
71 | } | |
72 | ||
73 | /* For pseudo DMA and PIO we need the virtual address | |
74 | * so this address mapping is the identity mapping. | |
75 | */ | |
76 | ||
77 | static dma_addr_t mac_esp_map_single(struct esp *esp, void *buf, | |
78 | size_t sz, int dir) | |
79 | { | |
80 | return (dma_addr_t)buf; | |
81 | } | |
82 | ||
83 | static int mac_esp_map_sg(struct esp *esp, struct scatterlist *sg, | |
84 | int num_sg, int dir) | |
85 | { | |
86 | int i; | |
87 | ||
88 | for (i = 0; i < num_sg; i++) | |
89 | sg[i].dma_address = (u32)sg_virt(&sg[i]); | |
90 | return num_sg; | |
91 | } | |
92 | ||
93 | static void mac_esp_unmap_single(struct esp *esp, dma_addr_t addr, | |
94 | size_t sz, int dir) | |
95 | { | |
96 | /* Nothing to do. */ | |
97 | } | |
98 | ||
99 | static void mac_esp_unmap_sg(struct esp *esp, struct scatterlist *sg, | |
100 | int num_sg, int dir) | |
101 | { | |
102 | /* Nothing to do. */ | |
103 | } | |
104 | ||
105 | static void mac_esp_reset_dma(struct esp *esp) | |
106 | { | |
107 | /* Nothing to do. */ | |
108 | } | |
109 | ||
110 | static void mac_esp_dma_drain(struct esp *esp) | |
111 | { | |
112 | /* Nothing to do. */ | |
113 | } | |
114 | ||
115 | static void mac_esp_dma_invalidate(struct esp *esp) | |
116 | { | |
117 | /* Nothing to do. */ | |
118 | } | |
119 | ||
120 | static int mac_esp_dma_error(struct esp *esp) | |
121 | { | |
122 | return MAC_ESP_GET_PRIV(esp)->error; | |
123 | } | |
124 | ||
125 | static inline int mac_esp_wait_for_empty_fifo(struct esp *esp) | |
126 | { | |
127 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
128 | int i = 500000; | |
129 | ||
130 | do { | |
131 | if (!(esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES)) | |
132 | return 0; | |
133 | ||
134 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
135 | return 1; | |
136 | ||
137 | udelay(2); | |
138 | } while (--i); | |
139 | ||
140 | printk(KERN_ERR PFX "FIFO is not empty (sreg %02x)\n", | |
141 | esp_read8(ESP_STATUS)); | |
142 | mep->error = 1; | |
143 | return 1; | |
144 | } | |
145 | ||
146 | static inline int mac_esp_wait_for_dreq(struct esp *esp) | |
147 | { | |
148 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
149 | int i = 500000; | |
150 | ||
151 | do { | |
152 | if (mep->pdma_regs == NULL) { | |
153 | if (mac_irq_pending(IRQ_MAC_SCSIDRQ)) | |
154 | return 0; | |
155 | } else { | |
156 | if (nubus_readl(mep->pdma_regs) & 0x200) | |
157 | return 0; | |
158 | } | |
159 | ||
160 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
161 | return 1; | |
162 | ||
163 | udelay(2); | |
164 | } while (--i); | |
165 | ||
166 | printk(KERN_ERR PFX "PDMA timeout (sreg %02x)\n", | |
167 | esp_read8(ESP_STATUS)); | |
168 | mep->error = 1; | |
169 | return 1; | |
170 | } | |
171 | ||
172 | #define MAC_ESP_PDMA_LOOP(operands) \ | |
173 | asm volatile ( \ | |
09e13e91 | 174 | " tstw %1 \n" \ |
6fe07aaf FT |
175 | " jbeq 20f \n" \ |
176 | "1: movew " operands " \n" \ | |
177 | "2: movew " operands " \n" \ | |
178 | "3: movew " operands " \n" \ | |
179 | "4: movew " operands " \n" \ | |
180 | "5: movew " operands " \n" \ | |
181 | "6: movew " operands " \n" \ | |
182 | "7: movew " operands " \n" \ | |
183 | "8: movew " operands " \n" \ | |
184 | "9: movew " operands " \n" \ | |
185 | "10: movew " operands " \n" \ | |
186 | "11: movew " operands " \n" \ | |
187 | "12: movew " operands " \n" \ | |
188 | "13: movew " operands " \n" \ | |
189 | "14: movew " operands " \n" \ | |
190 | "15: movew " operands " \n" \ | |
191 | "16: movew " operands " \n" \ | |
09e13e91 | 192 | " subqw #1,%1 \n" \ |
6fe07aaf | 193 | " jbne 1b \n" \ |
09e13e91 | 194 | "20: tstw %2 \n" \ |
6fe07aaf FT |
195 | " jbeq 30f \n" \ |
196 | "21: movew " operands " \n" \ | |
09e13e91 | 197 | " subqw #1,%2 \n" \ |
6fe07aaf | 198 | " jbne 21b \n" \ |
09e13e91 | 199 | "30: tstw %3 \n" \ |
6fe07aaf FT |
200 | " jbeq 40f \n" \ |
201 | "31: moveb " operands " \n" \ | |
202 | "32: nop \n" \ | |
203 | "40: \n" \ | |
204 | " \n" \ | |
205 | " .section __ex_table,\"a\" \n" \ | |
206 | " .align 4 \n" \ | |
207 | " .long 1b,40b \n" \ | |
208 | " .long 2b,40b \n" \ | |
209 | " .long 3b,40b \n" \ | |
210 | " .long 4b,40b \n" \ | |
211 | " .long 5b,40b \n" \ | |
212 | " .long 6b,40b \n" \ | |
213 | " .long 7b,40b \n" \ | |
214 | " .long 8b,40b \n" \ | |
215 | " .long 9b,40b \n" \ | |
216 | " .long 10b,40b \n" \ | |
217 | " .long 11b,40b \n" \ | |
218 | " .long 12b,40b \n" \ | |
219 | " .long 13b,40b \n" \ | |
220 | " .long 14b,40b \n" \ | |
221 | " .long 15b,40b \n" \ | |
222 | " .long 16b,40b \n" \ | |
223 | " .long 21b,40b \n" \ | |
224 | " .long 31b,40b \n" \ | |
225 | " .long 32b,40b \n" \ | |
226 | " .previous \n" \ | |
09e13e91 FT |
227 | : "+a" (addr), "+r" (count32), "+r" (count2) \ |
228 | : "g" (count1), "a" (mep->pdma_io)) | |
6fe07aaf FT |
229 | |
230 | static void mac_esp_send_pdma_cmd(struct esp *esp, u32 addr, u32 esp_count, | |
231 | u32 dma_count, int write, u8 cmd) | |
232 | { | |
233 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
234 | unsigned long flags; | |
235 | ||
236 | local_irq_save(flags); | |
237 | ||
238 | mep->error = 0; | |
239 | ||
240 | if (!write) | |
241 | scsi_esp_cmd(esp, ESP_CMD_FLUSH); | |
242 | ||
243 | esp_write8((esp_count >> 0) & 0xFF, ESP_TCLOW); | |
244 | esp_write8((esp_count >> 8) & 0xFF, ESP_TCMED); | |
245 | ||
246 | scsi_esp_cmd(esp, cmd); | |
247 | ||
248 | do { | |
249 | unsigned int count32 = esp_count >> 5; | |
250 | unsigned int count2 = (esp_count & 0x1F) >> 1; | |
09e13e91 | 251 | unsigned int count1 = esp_count & 1; |
6fe07aaf FT |
252 | unsigned int start_addr = addr; |
253 | ||
254 | if (mac_esp_wait_for_dreq(esp)) | |
255 | break; | |
256 | ||
257 | if (write) { | |
09e13e91 | 258 | MAC_ESP_PDMA_LOOP("%4@,%0@+"); |
6fe07aaf FT |
259 | |
260 | esp_count -= addr - start_addr; | |
261 | } else { | |
262 | unsigned int n; | |
263 | ||
09e13e91 | 264 | MAC_ESP_PDMA_LOOP("%0@+,%4@"); |
6fe07aaf FT |
265 | |
266 | if (mac_esp_wait_for_empty_fifo(esp)) | |
267 | break; | |
268 | ||
269 | n = (esp_read8(ESP_TCMED) << 8) + esp_read8(ESP_TCLOW); | |
270 | addr = start_addr + esp_count - n; | |
271 | esp_count = n; | |
272 | } | |
273 | } while (esp_count); | |
274 | ||
275 | local_irq_restore(flags); | |
276 | } | |
277 | ||
278 | /* | |
279 | * Programmed IO routines follow. | |
280 | */ | |
281 | ||
282 | static inline int mac_esp_wait_for_fifo(struct esp *esp) | |
283 | { | |
284 | int i = 500000; | |
285 | ||
286 | do { | |
287 | if (esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES) | |
288 | return 0; | |
289 | ||
290 | udelay(2); | |
291 | } while (--i); | |
292 | ||
293 | printk(KERN_ERR PFX "FIFO is empty (sreg %02x)\n", | |
294 | esp_read8(ESP_STATUS)); | |
295 | return 1; | |
296 | } | |
297 | ||
298 | static inline int mac_esp_wait_for_intr(struct esp *esp) | |
299 | { | |
300 | int i = 500000; | |
301 | ||
302 | do { | |
303 | esp->sreg = esp_read8(ESP_STATUS); | |
304 | if (esp->sreg & ESP_STAT_INTR) | |
305 | return 0; | |
306 | ||
307 | udelay(2); | |
308 | } while (--i); | |
309 | ||
310 | printk(KERN_ERR PFX "IRQ timeout (sreg %02x)\n", esp->sreg); | |
311 | return 1; | |
312 | } | |
313 | ||
314 | #define MAC_ESP_PIO_LOOP(operands, reg1) \ | |
315 | asm volatile ( \ | |
316 | "1: moveb " operands " \n" \ | |
317 | " subqw #1,%1 \n" \ | |
318 | " jbne 1b \n" \ | |
319 | : "+a" (addr), "+r" (reg1) \ | |
320 | : "a" (fifo)) | |
321 | ||
322 | #define MAC_ESP_PIO_FILL(operands, reg1) \ | |
323 | asm volatile ( \ | |
324 | " moveb " operands " \n" \ | |
325 | " moveb " operands " \n" \ | |
326 | " moveb " operands " \n" \ | |
327 | " moveb " operands " \n" \ | |
328 | " moveb " operands " \n" \ | |
329 | " moveb " operands " \n" \ | |
330 | " moveb " operands " \n" \ | |
331 | " moveb " operands " \n" \ | |
332 | " moveb " operands " \n" \ | |
333 | " moveb " operands " \n" \ | |
334 | " moveb " operands " \n" \ | |
335 | " moveb " operands " \n" \ | |
336 | " moveb " operands " \n" \ | |
337 | " moveb " operands " \n" \ | |
338 | " moveb " operands " \n" \ | |
339 | " moveb " operands " \n" \ | |
340 | " subqw #8,%1 \n" \ | |
341 | " subqw #8,%1 \n" \ | |
342 | : "+a" (addr), "+r" (reg1) \ | |
343 | : "a" (fifo)) | |
344 | ||
345 | #define MAC_ESP_FIFO_SIZE 16 | |
346 | ||
347 | static void mac_esp_send_pio_cmd(struct esp *esp, u32 addr, u32 esp_count, | |
348 | u32 dma_count, int write, u8 cmd) | |
349 | { | |
350 | unsigned long flags; | |
351 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
352 | u8 *fifo = esp->regs + ESP_FDATA * 16; | |
353 | ||
354 | local_irq_save(flags); | |
355 | ||
356 | cmd &= ~ESP_CMD_DMA; | |
357 | mep->error = 0; | |
358 | ||
359 | if (write) { | |
360 | scsi_esp_cmd(esp, cmd); | |
361 | ||
362 | if (!mac_esp_wait_for_intr(esp)) { | |
363 | if (mac_esp_wait_for_fifo(esp)) | |
364 | esp_count = 0; | |
365 | } else { | |
366 | esp_count = 0; | |
367 | } | |
368 | } else { | |
369 | scsi_esp_cmd(esp, ESP_CMD_FLUSH); | |
370 | ||
371 | if (esp_count >= MAC_ESP_FIFO_SIZE) | |
372 | MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); | |
373 | else | |
374 | MAC_ESP_PIO_LOOP("%0@+,%2@", esp_count); | |
375 | ||
376 | scsi_esp_cmd(esp, cmd); | |
377 | } | |
378 | ||
379 | while (esp_count) { | |
380 | unsigned int n; | |
381 | ||
382 | if (mac_esp_wait_for_intr(esp)) { | |
383 | mep->error = 1; | |
384 | break; | |
385 | } | |
386 | ||
387 | if (esp->sreg & ESP_STAT_SPAM) { | |
388 | printk(KERN_ERR PFX "gross error\n"); | |
389 | mep->error = 1; | |
390 | break; | |
391 | } | |
392 | ||
393 | n = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; | |
394 | ||
395 | if (write) { | |
396 | if (n > esp_count) | |
397 | n = esp_count; | |
398 | esp_count -= n; | |
399 | ||
400 | MAC_ESP_PIO_LOOP("%2@,%0@+", n); | |
401 | ||
402 | if ((esp->sreg & ESP_STAT_PMASK) == ESP_STATP) | |
403 | break; | |
404 | ||
405 | if (esp_count) { | |
406 | esp->ireg = esp_read8(ESP_INTRPT); | |
407 | if (esp->ireg & ESP_INTR_DC) | |
408 | break; | |
409 | ||
410 | scsi_esp_cmd(esp, ESP_CMD_TI); | |
411 | } | |
412 | } else { | |
413 | esp->ireg = esp_read8(ESP_INTRPT); | |
414 | if (esp->ireg & ESP_INTR_DC) | |
415 | break; | |
416 | ||
417 | n = MAC_ESP_FIFO_SIZE - n; | |
418 | if (n > esp_count) | |
419 | n = esp_count; | |
420 | ||
421 | if (n == MAC_ESP_FIFO_SIZE) { | |
422 | MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); | |
423 | } else { | |
424 | esp_count -= n; | |
425 | MAC_ESP_PIO_LOOP("%0@+,%2@", n); | |
426 | } | |
427 | ||
428 | scsi_esp_cmd(esp, ESP_CMD_TI); | |
429 | } | |
430 | } | |
431 | ||
432 | local_irq_restore(flags); | |
433 | } | |
434 | ||
435 | static int mac_esp_irq_pending(struct esp *esp) | |
436 | { | |
437 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
438 | return 1; | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static u32 mac_esp_dma_length_limit(struct esp *esp, u32 dma_addr, u32 dma_len) | |
443 | { | |
444 | return dma_len > 0xFFFF ? 0xFFFF : dma_len; | |
445 | } | |
446 | ||
da244654 FT |
447 | static irqreturn_t mac_scsi_esp_intr(int irq, void *dev_id) |
448 | { | |
449 | int got_intr; | |
450 | ||
451 | /* | |
452 | * This is an edge triggered IRQ, so we have to be careful to | |
453 | * avoid missing a transition when it is shared by two ESP devices. | |
454 | */ | |
455 | ||
456 | do { | |
457 | got_intr = 0; | |
458 | if (esp_chips[0] && | |
459 | (mac_esp_read8(esp_chips[0], ESP_STATUS) & ESP_STAT_INTR)) { | |
460 | (void)scsi_esp_intr(irq, esp_chips[0]); | |
461 | got_intr = 1; | |
462 | } | |
463 | if (esp_chips[1] && | |
464 | (mac_esp_read8(esp_chips[1], ESP_STATUS) & ESP_STAT_INTR)) { | |
465 | (void)scsi_esp_intr(irq, esp_chips[1]); | |
466 | got_intr = 1; | |
467 | } | |
468 | } while (got_intr); | |
469 | ||
470 | return IRQ_HANDLED; | |
471 | } | |
472 | ||
6fe07aaf FT |
473 | static struct esp_driver_ops mac_esp_ops = { |
474 | .esp_write8 = mac_esp_write8, | |
475 | .esp_read8 = mac_esp_read8, | |
476 | .map_single = mac_esp_map_single, | |
477 | .map_sg = mac_esp_map_sg, | |
478 | .unmap_single = mac_esp_unmap_single, | |
479 | .unmap_sg = mac_esp_unmap_sg, | |
480 | .irq_pending = mac_esp_irq_pending, | |
481 | .dma_length_limit = mac_esp_dma_length_limit, | |
482 | .reset_dma = mac_esp_reset_dma, | |
483 | .dma_drain = mac_esp_dma_drain, | |
484 | .dma_invalidate = mac_esp_dma_invalidate, | |
485 | .send_dma_cmd = mac_esp_send_pdma_cmd, | |
486 | .dma_error = mac_esp_dma_error, | |
487 | }; | |
488 | ||
489 | static int __devinit esp_mac_probe(struct platform_device *dev) | |
490 | { | |
491 | struct scsi_host_template *tpnt = &scsi_esp_template; | |
492 | struct Scsi_Host *host; | |
493 | struct esp *esp; | |
494 | int err; | |
495 | int chips_present; | |
496 | struct mac_esp_priv *mep; | |
497 | ||
498 | if (!MACH_IS_MAC) | |
499 | return -ENODEV; | |
500 | ||
501 | switch (macintosh_config->scsi_type) { | |
502 | case MAC_SCSI_QUADRA: | |
503 | case MAC_SCSI_QUADRA3: | |
504 | chips_present = 1; | |
505 | break; | |
506 | case MAC_SCSI_QUADRA2: | |
507 | if ((macintosh_config->ident == MAC_MODEL_Q900) || | |
508 | (macintosh_config->ident == MAC_MODEL_Q950)) | |
509 | chips_present = 2; | |
510 | else | |
511 | chips_present = 1; | |
512 | break; | |
513 | default: | |
514 | chips_present = 0; | |
515 | } | |
516 | ||
517 | if (dev->id + 1 > chips_present) | |
518 | return -ENODEV; | |
519 | ||
520 | host = scsi_host_alloc(tpnt, sizeof(struct esp)); | |
521 | ||
522 | err = -ENOMEM; | |
523 | if (!host) | |
524 | goto fail; | |
525 | ||
526 | host->max_id = 8; | |
527 | host->use_clustering = DISABLE_CLUSTERING; | |
528 | esp = shost_priv(host); | |
529 | ||
530 | esp->host = host; | |
531 | esp->dev = dev; | |
532 | ||
533 | esp->command_block = kzalloc(16, GFP_KERNEL); | |
534 | if (!esp->command_block) | |
535 | goto fail_unlink; | |
536 | esp->command_block_dma = (dma_addr_t)esp->command_block; | |
537 | ||
538 | esp->scsi_id = 7; | |
539 | host->this_id = esp->scsi_id; | |
540 | esp->scsi_id_mask = 1 << esp->scsi_id; | |
541 | ||
542 | mep = kzalloc(sizeof(struct mac_esp_priv), GFP_KERNEL); | |
543 | if (!mep) | |
544 | goto fail_free_command_block; | |
545 | mep->esp = esp; | |
546 | platform_set_drvdata(dev, mep); | |
547 | ||
548 | switch (macintosh_config->scsi_type) { | |
549 | case MAC_SCSI_QUADRA: | |
550 | esp->cfreq = 16500000; | |
551 | esp->regs = (void __iomem *)MAC_ESP_REGS_QUADRA; | |
552 | mep->pdma_io = esp->regs + MAC_ESP_PDMA_IO_OFFSET; | |
553 | mep->pdma_regs = NULL; | |
554 | break; | |
555 | case MAC_SCSI_QUADRA2: | |
556 | esp->cfreq = 25000000; | |
557 | esp->regs = (void __iomem *)(MAC_ESP_REGS_QUADRA2 + | |
558 | dev->id * MAC_ESP_REGS_SPACING); | |
559 | mep->pdma_io = esp->regs + MAC_ESP_PDMA_IO_OFFSET; | |
560 | mep->pdma_regs = (void __iomem *)(MAC_ESP_PDMA_REG + | |
561 | dev->id * MAC_ESP_PDMA_REG_SPACING); | |
562 | nubus_writel(0x1d1, mep->pdma_regs); | |
563 | break; | |
564 | case MAC_SCSI_QUADRA3: | |
565 | /* These quadras have a real DMA controller (the PSC) but we | |
566 | * don't know how to drive it so we must use PIO instead. | |
567 | */ | |
568 | esp->cfreq = 25000000; | |
569 | esp->regs = (void __iomem *)MAC_ESP_REGS_QUADRA3; | |
570 | mep->pdma_io = NULL; | |
571 | mep->pdma_regs = NULL; | |
572 | break; | |
573 | } | |
574 | ||
575 | esp->ops = &mac_esp_ops; | |
576 | if (mep->pdma_io == NULL) { | |
577 | printk(KERN_INFO PFX "using PIO for controller %d\n", dev->id); | |
578 | esp_write8(0, ESP_TCLOW); | |
579 | esp_write8(0, ESP_TCMED); | |
580 | esp->flags = ESP_FLAG_DISABLE_SYNC; | |
581 | mac_esp_ops.send_dma_cmd = mac_esp_send_pio_cmd; | |
582 | } else { | |
583 | printk(KERN_INFO PFX "using PDMA for controller %d\n", dev->id); | |
584 | } | |
585 | ||
586 | host->irq = IRQ_MAC_SCSI; | |
da244654 FT |
587 | esp_chips[dev->id] = esp; |
588 | mb(); | |
589 | if (esp_chips[!dev->id] == NULL) { | |
590 | err = request_irq(host->irq, mac_scsi_esp_intr, 0, | |
591 | "Mac ESP", NULL); | |
592 | if (err < 0) { | |
593 | esp_chips[dev->id] = NULL; | |
594 | goto fail_free_priv; | |
595 | } | |
596 | } | |
6fe07aaf FT |
597 | |
598 | err = scsi_esp_register(esp, &dev->dev); | |
599 | if (err) | |
600 | goto fail_free_irq; | |
601 | ||
602 | return 0; | |
603 | ||
604 | fail_free_irq: | |
da244654 FT |
605 | if (esp_chips[!dev->id] == NULL) |
606 | free_irq(host->irq, esp); | |
6fe07aaf FT |
607 | fail_free_priv: |
608 | kfree(mep); | |
609 | fail_free_command_block: | |
610 | kfree(esp->command_block); | |
611 | fail_unlink: | |
612 | scsi_host_put(host); | |
613 | fail: | |
614 | return err; | |
615 | } | |
616 | ||
617 | static int __devexit esp_mac_remove(struct platform_device *dev) | |
618 | { | |
619 | struct mac_esp_priv *mep = platform_get_drvdata(dev); | |
620 | struct esp *esp = mep->esp; | |
621 | unsigned int irq = esp->host->irq; | |
622 | ||
623 | scsi_esp_unregister(esp); | |
624 | ||
da244654 FT |
625 | esp_chips[dev->id] = NULL; |
626 | if (!(esp_chips[0] || esp_chips[1])) | |
627 | free_irq(irq, NULL); | |
6fe07aaf FT |
628 | |
629 | kfree(mep); | |
630 | ||
631 | kfree(esp->command_block); | |
632 | ||
633 | scsi_host_put(esp->host); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | static struct platform_driver esp_mac_driver = { | |
639 | .probe = esp_mac_probe, | |
640 | .remove = __devexit_p(esp_mac_remove), | |
641 | .driver = { | |
642 | .name = DRV_MODULE_NAME, | |
643 | }, | |
644 | }; | |
645 | ||
646 | static int __init mac_esp_init(void) | |
647 | { | |
648 | int err; | |
649 | ||
650 | err = platform_driver_register(&esp_mac_driver); | |
651 | if (err) | |
652 | return err; | |
653 | ||
da244654 FT |
654 | internal_pdev = platform_device_alloc(DRV_MODULE_NAME, 0); |
655 | if (internal_pdev && platform_device_add(internal_pdev)) { | |
656 | platform_device_put(internal_pdev); | |
657 | internal_pdev = NULL; | |
6fe07aaf | 658 | } |
da244654 FT |
659 | external_pdev = platform_device_alloc(DRV_MODULE_NAME, 1); |
660 | if (external_pdev && platform_device_add(external_pdev)) { | |
661 | platform_device_put(external_pdev); | |
662 | external_pdev = NULL; | |
6fe07aaf FT |
663 | } |
664 | ||
da244654 | 665 | if (internal_pdev || external_pdev) { |
6fe07aaf FT |
666 | return 0; |
667 | } else { | |
668 | platform_driver_unregister(&esp_mac_driver); | |
669 | return -ENOMEM; | |
670 | } | |
671 | } | |
672 | ||
673 | static void __exit mac_esp_exit(void) | |
674 | { | |
675 | platform_driver_unregister(&esp_mac_driver); | |
676 | ||
da244654 FT |
677 | if (internal_pdev) { |
678 | platform_device_unregister(internal_pdev); | |
679 | internal_pdev = NULL; | |
6fe07aaf | 680 | } |
da244654 FT |
681 | if (external_pdev) { |
682 | platform_device_unregister(external_pdev); | |
683 | external_pdev = NULL; | |
6fe07aaf FT |
684 | } |
685 | } | |
686 | ||
687 | MODULE_DESCRIPTION("Mac ESP SCSI driver"); | |
688 | MODULE_AUTHOR("Finn Thain <fthain@telegraphics.com.au>"); | |
839cd310 | 689 | MODULE_LICENSE("GPL v2"); |
6fe07aaf FT |
690 | MODULE_VERSION(DRV_VERSION); |
691 | ||
692 | module_init(mac_esp_init); | |
693 | module_exit(mac_esp_exit); |