Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
6fe07aaf FT |
23 | |
24 | #include <asm/irq.h> | |
25 | #include <asm/dma.h> | |
6fe07aaf FT |
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 | 56 | static struct esp *esp_chips[2]; |
6fe07aaf FT |
57 | |
58 | #define MAC_ESP_GET_PRIV(esp) ((struct mac_esp_priv *) \ | |
59 | platform_get_drvdata((struct platform_device *) \ | |
60 | (esp->dev))) | |
61 | ||
62 | static inline void mac_esp_write8(struct esp *esp, u8 val, unsigned long reg) | |
63 | { | |
64 | nubus_writeb(val, esp->regs + reg * 16); | |
65 | } | |
66 | ||
67 | static inline u8 mac_esp_read8(struct esp *esp, unsigned long reg) | |
68 | { | |
69 | return nubus_readb(esp->regs + reg * 16); | |
70 | } | |
71 | ||
72 | /* For pseudo DMA and PIO we need the virtual address | |
73 | * so this address mapping is the identity mapping. | |
74 | */ | |
75 | ||
76 | static dma_addr_t mac_esp_map_single(struct esp *esp, void *buf, | |
77 | size_t sz, int dir) | |
78 | { | |
79 | return (dma_addr_t)buf; | |
80 | } | |
81 | ||
82 | static int mac_esp_map_sg(struct esp *esp, struct scatterlist *sg, | |
83 | int num_sg, int dir) | |
84 | { | |
85 | int i; | |
86 | ||
87 | for (i = 0; i < num_sg; i++) | |
88 | sg[i].dma_address = (u32)sg_virt(&sg[i]); | |
89 | return num_sg; | |
90 | } | |
91 | ||
92 | static void mac_esp_unmap_single(struct esp *esp, dma_addr_t addr, | |
93 | size_t sz, int dir) | |
94 | { | |
95 | /* Nothing to do. */ | |
96 | } | |
97 | ||
98 | static void mac_esp_unmap_sg(struct esp *esp, struct scatterlist *sg, | |
99 | int num_sg, int dir) | |
100 | { | |
101 | /* Nothing to do. */ | |
102 | } | |
103 | ||
104 | static void mac_esp_reset_dma(struct esp *esp) | |
105 | { | |
106 | /* Nothing to do. */ | |
107 | } | |
108 | ||
109 | static void mac_esp_dma_drain(struct esp *esp) | |
110 | { | |
111 | /* Nothing to do. */ | |
112 | } | |
113 | ||
114 | static void mac_esp_dma_invalidate(struct esp *esp) | |
115 | { | |
116 | /* Nothing to do. */ | |
117 | } | |
118 | ||
119 | static int mac_esp_dma_error(struct esp *esp) | |
120 | { | |
121 | return MAC_ESP_GET_PRIV(esp)->error; | |
122 | } | |
123 | ||
124 | static inline int mac_esp_wait_for_empty_fifo(struct esp *esp) | |
125 | { | |
126 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
127 | int i = 500000; | |
128 | ||
129 | do { | |
130 | if (!(esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES)) | |
131 | return 0; | |
132 | ||
133 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
134 | return 1; | |
135 | ||
136 | udelay(2); | |
137 | } while (--i); | |
138 | ||
139 | printk(KERN_ERR PFX "FIFO is not empty (sreg %02x)\n", | |
140 | esp_read8(ESP_STATUS)); | |
141 | mep->error = 1; | |
142 | return 1; | |
143 | } | |
144 | ||
145 | static inline int mac_esp_wait_for_dreq(struct esp *esp) | |
146 | { | |
147 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
148 | int i = 500000; | |
149 | ||
150 | do { | |
151 | if (mep->pdma_regs == NULL) { | |
152 | if (mac_irq_pending(IRQ_MAC_SCSIDRQ)) | |
153 | return 0; | |
154 | } else { | |
155 | if (nubus_readl(mep->pdma_regs) & 0x200) | |
156 | return 0; | |
157 | } | |
158 | ||
159 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
160 | return 1; | |
161 | ||
162 | udelay(2); | |
163 | } while (--i); | |
164 | ||
165 | printk(KERN_ERR PFX "PDMA timeout (sreg %02x)\n", | |
166 | esp_read8(ESP_STATUS)); | |
167 | mep->error = 1; | |
168 | return 1; | |
169 | } | |
170 | ||
171 | #define MAC_ESP_PDMA_LOOP(operands) \ | |
172 | asm volatile ( \ | |
09e13e91 | 173 | " tstw %1 \n" \ |
6fe07aaf FT |
174 | " jbeq 20f \n" \ |
175 | "1: movew " operands " \n" \ | |
176 | "2: movew " operands " \n" \ | |
177 | "3: movew " operands " \n" \ | |
178 | "4: movew " operands " \n" \ | |
179 | "5: movew " operands " \n" \ | |
180 | "6: movew " operands " \n" \ | |
181 | "7: movew " operands " \n" \ | |
182 | "8: movew " operands " \n" \ | |
183 | "9: movew " operands " \n" \ | |
184 | "10: movew " operands " \n" \ | |
185 | "11: movew " operands " \n" \ | |
186 | "12: movew " operands " \n" \ | |
187 | "13: movew " operands " \n" \ | |
188 | "14: movew " operands " \n" \ | |
189 | "15: movew " operands " \n" \ | |
190 | "16: movew " operands " \n" \ | |
09e13e91 | 191 | " subqw #1,%1 \n" \ |
6fe07aaf | 192 | " jbne 1b \n" \ |
09e13e91 | 193 | "20: tstw %2 \n" \ |
6fe07aaf FT |
194 | " jbeq 30f \n" \ |
195 | "21: movew " operands " \n" \ | |
09e13e91 | 196 | " subqw #1,%2 \n" \ |
6fe07aaf | 197 | " jbne 21b \n" \ |
09e13e91 | 198 | "30: tstw %3 \n" \ |
6fe07aaf FT |
199 | " jbeq 40f \n" \ |
200 | "31: moveb " operands " \n" \ | |
201 | "32: nop \n" \ | |
202 | "40: \n" \ | |
203 | " \n" \ | |
204 | " .section __ex_table,\"a\" \n" \ | |
205 | " .align 4 \n" \ | |
206 | " .long 1b,40b \n" \ | |
207 | " .long 2b,40b \n" \ | |
208 | " .long 3b,40b \n" \ | |
209 | " .long 4b,40b \n" \ | |
210 | " .long 5b,40b \n" \ | |
211 | " .long 6b,40b \n" \ | |
212 | " .long 7b,40b \n" \ | |
213 | " .long 8b,40b \n" \ | |
214 | " .long 9b,40b \n" \ | |
215 | " .long 10b,40b \n" \ | |
216 | " .long 11b,40b \n" \ | |
217 | " .long 12b,40b \n" \ | |
218 | " .long 13b,40b \n" \ | |
219 | " .long 14b,40b \n" \ | |
220 | " .long 15b,40b \n" \ | |
221 | " .long 16b,40b \n" \ | |
222 | " .long 21b,40b \n" \ | |
223 | " .long 31b,40b \n" \ | |
224 | " .long 32b,40b \n" \ | |
225 | " .previous \n" \ | |
09e13e91 FT |
226 | : "+a" (addr), "+r" (count32), "+r" (count2) \ |
227 | : "g" (count1), "a" (mep->pdma_io)) | |
6fe07aaf FT |
228 | |
229 | static void mac_esp_send_pdma_cmd(struct esp *esp, u32 addr, u32 esp_count, | |
230 | u32 dma_count, int write, u8 cmd) | |
231 | { | |
232 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); | |
6fe07aaf FT |
233 | |
234 | mep->error = 0; | |
235 | ||
236 | if (!write) | |
237 | scsi_esp_cmd(esp, ESP_CMD_FLUSH); | |
238 | ||
239 | esp_write8((esp_count >> 0) & 0xFF, ESP_TCLOW); | |
240 | esp_write8((esp_count >> 8) & 0xFF, ESP_TCMED); | |
241 | ||
242 | scsi_esp_cmd(esp, cmd); | |
243 | ||
244 | do { | |
245 | unsigned int count32 = esp_count >> 5; | |
246 | unsigned int count2 = (esp_count & 0x1F) >> 1; | |
09e13e91 | 247 | unsigned int count1 = esp_count & 1; |
6fe07aaf FT |
248 | unsigned int start_addr = addr; |
249 | ||
250 | if (mac_esp_wait_for_dreq(esp)) | |
251 | break; | |
252 | ||
253 | if (write) { | |
09e13e91 | 254 | MAC_ESP_PDMA_LOOP("%4@,%0@+"); |
6fe07aaf FT |
255 | |
256 | esp_count -= addr - start_addr; | |
257 | } else { | |
258 | unsigned int n; | |
259 | ||
09e13e91 | 260 | MAC_ESP_PDMA_LOOP("%0@+,%4@"); |
6fe07aaf FT |
261 | |
262 | if (mac_esp_wait_for_empty_fifo(esp)) | |
263 | break; | |
264 | ||
265 | n = (esp_read8(ESP_TCMED) << 8) + esp_read8(ESP_TCLOW); | |
266 | addr = start_addr + esp_count - n; | |
267 | esp_count = n; | |
268 | } | |
269 | } while (esp_count); | |
6fe07aaf FT |
270 | } |
271 | ||
272 | /* | |
273 | * Programmed IO routines follow. | |
274 | */ | |
275 | ||
02507a80 | 276 | static inline unsigned int mac_esp_wait_for_fifo(struct esp *esp) |
6fe07aaf FT |
277 | { |
278 | int i = 500000; | |
279 | ||
280 | do { | |
02507a80 FT |
281 | unsigned int fbytes = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; |
282 | ||
283 | if (fbytes) | |
284 | return fbytes; | |
6fe07aaf FT |
285 | |
286 | udelay(2); | |
287 | } while (--i); | |
288 | ||
289 | printk(KERN_ERR PFX "FIFO is empty (sreg %02x)\n", | |
290 | esp_read8(ESP_STATUS)); | |
02507a80 | 291 | return 0; |
6fe07aaf FT |
292 | } |
293 | ||
294 | static inline int mac_esp_wait_for_intr(struct esp *esp) | |
295 | { | |
02507a80 | 296 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); |
6fe07aaf FT |
297 | int i = 500000; |
298 | ||
299 | do { | |
300 | esp->sreg = esp_read8(ESP_STATUS); | |
301 | if (esp->sreg & ESP_STAT_INTR) | |
302 | return 0; | |
303 | ||
304 | udelay(2); | |
305 | } while (--i); | |
306 | ||
307 | printk(KERN_ERR PFX "IRQ timeout (sreg %02x)\n", esp->sreg); | |
02507a80 | 308 | mep->error = 1; |
6fe07aaf FT |
309 | return 1; |
310 | } | |
311 | ||
312 | #define MAC_ESP_PIO_LOOP(operands, reg1) \ | |
313 | asm volatile ( \ | |
314 | "1: moveb " operands " \n" \ | |
315 | " subqw #1,%1 \n" \ | |
316 | " jbne 1b \n" \ | |
317 | : "+a" (addr), "+r" (reg1) \ | |
318 | : "a" (fifo)) | |
319 | ||
320 | #define MAC_ESP_PIO_FILL(operands, reg1) \ | |
321 | asm volatile ( \ | |
322 | " moveb " operands " \n" \ | |
323 | " moveb " operands " \n" \ | |
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 | " subqw #8,%1 \n" \ | |
339 | " subqw #8,%1 \n" \ | |
340 | : "+a" (addr), "+r" (reg1) \ | |
341 | : "a" (fifo)) | |
342 | ||
343 | #define MAC_ESP_FIFO_SIZE 16 | |
344 | ||
345 | static void mac_esp_send_pio_cmd(struct esp *esp, u32 addr, u32 esp_count, | |
346 | u32 dma_count, int write, u8 cmd) | |
347 | { | |
6fe07aaf FT |
348 | struct mac_esp_priv *mep = MAC_ESP_GET_PRIV(esp); |
349 | u8 *fifo = esp->regs + ESP_FDATA * 16; | |
350 | ||
6fe07aaf FT |
351 | cmd &= ~ESP_CMD_DMA; |
352 | mep->error = 0; | |
353 | ||
354 | if (write) { | |
355 | scsi_esp_cmd(esp, cmd); | |
356 | ||
02507a80 FT |
357 | while (1) { |
358 | unsigned int n; | |
359 | ||
360 | n = mac_esp_wait_for_fifo(esp); | |
361 | if (!n) | |
362 | break; | |
363 | ||
364 | if (n > esp_count) | |
365 | n = esp_count; | |
366 | esp_count -= n; | |
367 | ||
368 | MAC_ESP_PIO_LOOP("%2@,%0@+", n); | |
369 | ||
370 | if (!esp_count) | |
371 | break; | |
372 | ||
373 | if (mac_esp_wait_for_intr(esp)) | |
374 | break; | |
375 | ||
376 | if (((esp->sreg & ESP_STAT_PMASK) != ESP_DIP) && | |
377 | ((esp->sreg & ESP_STAT_PMASK) != ESP_MIP)) | |
378 | break; | |
379 | ||
380 | esp->ireg = esp_read8(ESP_INTRPT); | |
381 | if ((esp->ireg & (ESP_INTR_DC | ESP_INTR_BSERV)) != | |
382 | ESP_INTR_BSERV) | |
383 | break; | |
384 | ||
385 | scsi_esp_cmd(esp, ESP_CMD_TI); | |
6fe07aaf FT |
386 | } |
387 | } else { | |
388 | scsi_esp_cmd(esp, ESP_CMD_FLUSH); | |
389 | ||
390 | if (esp_count >= MAC_ESP_FIFO_SIZE) | |
391 | MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); | |
392 | else | |
393 | MAC_ESP_PIO_LOOP("%0@+,%2@", esp_count); | |
394 | ||
395 | scsi_esp_cmd(esp, cmd); | |
6fe07aaf | 396 | |
02507a80 FT |
397 | while (esp_count) { |
398 | unsigned int n; | |
6fe07aaf | 399 | |
02507a80 | 400 | if (mac_esp_wait_for_intr(esp)) |
6fe07aaf FT |
401 | break; |
402 | ||
02507a80 FT |
403 | if (((esp->sreg & ESP_STAT_PMASK) != ESP_DOP) && |
404 | ((esp->sreg & ESP_STAT_PMASK) != ESP_MOP)) | |
405 | break; | |
6fe07aaf | 406 | |
6fe07aaf | 407 | esp->ireg = esp_read8(ESP_INTRPT); |
02507a80 FT |
408 | if ((esp->ireg & (ESP_INTR_DC | ESP_INTR_BSERV)) != |
409 | ESP_INTR_BSERV) | |
6fe07aaf FT |
410 | break; |
411 | ||
02507a80 FT |
412 | n = MAC_ESP_FIFO_SIZE - |
413 | (esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES); | |
6fe07aaf FT |
414 | if (n > esp_count) |
415 | n = esp_count; | |
416 | ||
417 | if (n == MAC_ESP_FIFO_SIZE) { | |
418 | MAC_ESP_PIO_FILL("%0@+,%2@", esp_count); | |
419 | } else { | |
420 | esp_count -= n; | |
421 | MAC_ESP_PIO_LOOP("%0@+,%2@", n); | |
422 | } | |
423 | ||
424 | scsi_esp_cmd(esp, ESP_CMD_TI); | |
425 | } | |
426 | } | |
6fe07aaf FT |
427 | } |
428 | ||
429 | static int mac_esp_irq_pending(struct esp *esp) | |
430 | { | |
431 | if (esp_read8(ESP_STATUS) & ESP_STAT_INTR) | |
432 | return 1; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | static u32 mac_esp_dma_length_limit(struct esp *esp, u32 dma_addr, u32 dma_len) | |
437 | { | |
438 | return dma_len > 0xFFFF ? 0xFFFF : dma_len; | |
439 | } | |
440 | ||
da244654 FT |
441 | static irqreturn_t mac_scsi_esp_intr(int irq, void *dev_id) |
442 | { | |
443 | int got_intr; | |
444 | ||
445 | /* | |
446 | * This is an edge triggered IRQ, so we have to be careful to | |
447 | * avoid missing a transition when it is shared by two ESP devices. | |
448 | */ | |
449 | ||
450 | do { | |
451 | got_intr = 0; | |
452 | if (esp_chips[0] && | |
453 | (mac_esp_read8(esp_chips[0], ESP_STATUS) & ESP_STAT_INTR)) { | |
454 | (void)scsi_esp_intr(irq, esp_chips[0]); | |
455 | got_intr = 1; | |
456 | } | |
457 | if (esp_chips[1] && | |
458 | (mac_esp_read8(esp_chips[1], ESP_STATUS) & ESP_STAT_INTR)) { | |
459 | (void)scsi_esp_intr(irq, esp_chips[1]); | |
460 | got_intr = 1; | |
461 | } | |
462 | } while (got_intr); | |
463 | ||
464 | return IRQ_HANDLED; | |
465 | } | |
466 | ||
6fe07aaf FT |
467 | static struct esp_driver_ops mac_esp_ops = { |
468 | .esp_write8 = mac_esp_write8, | |
469 | .esp_read8 = mac_esp_read8, | |
470 | .map_single = mac_esp_map_single, | |
471 | .map_sg = mac_esp_map_sg, | |
472 | .unmap_single = mac_esp_unmap_single, | |
473 | .unmap_sg = mac_esp_unmap_sg, | |
474 | .irq_pending = mac_esp_irq_pending, | |
475 | .dma_length_limit = mac_esp_dma_length_limit, | |
476 | .reset_dma = mac_esp_reset_dma, | |
477 | .dma_drain = mac_esp_dma_drain, | |
478 | .dma_invalidate = mac_esp_dma_invalidate, | |
479 | .send_dma_cmd = mac_esp_send_pdma_cmd, | |
480 | .dma_error = mac_esp_dma_error, | |
481 | }; | |
482 | ||
483 | static int __devinit esp_mac_probe(struct platform_device *dev) | |
484 | { | |
485 | struct scsi_host_template *tpnt = &scsi_esp_template; | |
486 | struct Scsi_Host *host; | |
487 | struct esp *esp; | |
488 | int err; | |
6fe07aaf FT |
489 | struct mac_esp_priv *mep; |
490 | ||
491 | if (!MACH_IS_MAC) | |
492 | return -ENODEV; | |
493 | ||
cff75f1f | 494 | if (dev->id > 1) |
6fe07aaf FT |
495 | return -ENODEV; |
496 | ||
497 | host = scsi_host_alloc(tpnt, sizeof(struct esp)); | |
498 | ||
499 | err = -ENOMEM; | |
500 | if (!host) | |
501 | goto fail; | |
502 | ||
503 | host->max_id = 8; | |
504 | host->use_clustering = DISABLE_CLUSTERING; | |
505 | esp = shost_priv(host); | |
506 | ||
507 | esp->host = host; | |
508 | esp->dev = dev; | |
509 | ||
510 | esp->command_block = kzalloc(16, GFP_KERNEL); | |
511 | if (!esp->command_block) | |
512 | goto fail_unlink; | |
513 | esp->command_block_dma = (dma_addr_t)esp->command_block; | |
514 | ||
515 | esp->scsi_id = 7; | |
516 | host->this_id = esp->scsi_id; | |
517 | esp->scsi_id_mask = 1 << esp->scsi_id; | |
518 | ||
519 | mep = kzalloc(sizeof(struct mac_esp_priv), GFP_KERNEL); | |
520 | if (!mep) | |
521 | goto fail_free_command_block; | |
522 | mep->esp = esp; | |
523 | platform_set_drvdata(dev, mep); | |
524 | ||
525 | switch (macintosh_config->scsi_type) { | |
526 | case MAC_SCSI_QUADRA: | |
527 | esp->cfreq = 16500000; | |
528 | esp->regs = (void __iomem *)MAC_ESP_REGS_QUADRA; | |
529 | mep->pdma_io = esp->regs + MAC_ESP_PDMA_IO_OFFSET; | |
530 | mep->pdma_regs = NULL; | |
531 | break; | |
532 | case MAC_SCSI_QUADRA2: | |
533 | esp->cfreq = 25000000; | |
534 | esp->regs = (void __iomem *)(MAC_ESP_REGS_QUADRA2 + | |
535 | dev->id * MAC_ESP_REGS_SPACING); | |
536 | mep->pdma_io = esp->regs + MAC_ESP_PDMA_IO_OFFSET; | |
537 | mep->pdma_regs = (void __iomem *)(MAC_ESP_PDMA_REG + | |
538 | dev->id * MAC_ESP_PDMA_REG_SPACING); | |
539 | nubus_writel(0x1d1, mep->pdma_regs); | |
540 | break; | |
541 | case MAC_SCSI_QUADRA3: | |
542 | /* These quadras have a real DMA controller (the PSC) but we | |
543 | * don't know how to drive it so we must use PIO instead. | |
544 | */ | |
545 | esp->cfreq = 25000000; | |
546 | esp->regs = (void __iomem *)MAC_ESP_REGS_QUADRA3; | |
547 | mep->pdma_io = NULL; | |
548 | mep->pdma_regs = NULL; | |
549 | break; | |
550 | } | |
551 | ||
552 | esp->ops = &mac_esp_ops; | |
553 | if (mep->pdma_io == NULL) { | |
554 | printk(KERN_INFO PFX "using PIO for controller %d\n", dev->id); | |
555 | esp_write8(0, ESP_TCLOW); | |
556 | esp_write8(0, ESP_TCMED); | |
557 | esp->flags = ESP_FLAG_DISABLE_SYNC; | |
558 | mac_esp_ops.send_dma_cmd = mac_esp_send_pio_cmd; | |
559 | } else { | |
560 | printk(KERN_INFO PFX "using PDMA for controller %d\n", dev->id); | |
561 | } | |
562 | ||
563 | host->irq = IRQ_MAC_SCSI; | |
da244654 FT |
564 | esp_chips[dev->id] = esp; |
565 | mb(); | |
566 | if (esp_chips[!dev->id] == NULL) { | |
567 | err = request_irq(host->irq, mac_scsi_esp_intr, 0, | |
568 | "Mac ESP", NULL); | |
569 | if (err < 0) { | |
570 | esp_chips[dev->id] = NULL; | |
571 | goto fail_free_priv; | |
572 | } | |
573 | } | |
6fe07aaf FT |
574 | |
575 | err = scsi_esp_register(esp, &dev->dev); | |
576 | if (err) | |
577 | goto fail_free_irq; | |
578 | ||
579 | return 0; | |
580 | ||
581 | fail_free_irq: | |
da244654 FT |
582 | if (esp_chips[!dev->id] == NULL) |
583 | free_irq(host->irq, esp); | |
6fe07aaf FT |
584 | fail_free_priv: |
585 | kfree(mep); | |
586 | fail_free_command_block: | |
587 | kfree(esp->command_block); | |
588 | fail_unlink: | |
589 | scsi_host_put(host); | |
590 | fail: | |
591 | return err; | |
592 | } | |
593 | ||
594 | static int __devexit esp_mac_remove(struct platform_device *dev) | |
595 | { | |
596 | struct mac_esp_priv *mep = platform_get_drvdata(dev); | |
597 | struct esp *esp = mep->esp; | |
598 | unsigned int irq = esp->host->irq; | |
599 | ||
600 | scsi_esp_unregister(esp); | |
601 | ||
da244654 FT |
602 | esp_chips[dev->id] = NULL; |
603 | if (!(esp_chips[0] || esp_chips[1])) | |
604 | free_irq(irq, NULL); | |
6fe07aaf FT |
605 | |
606 | kfree(mep); | |
607 | ||
608 | kfree(esp->command_block); | |
609 | ||
610 | scsi_host_put(esp->host); | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | static struct platform_driver esp_mac_driver = { | |
616 | .probe = esp_mac_probe, | |
617 | .remove = __devexit_p(esp_mac_remove), | |
618 | .driver = { | |
cff75f1f FT |
619 | .name = DRV_MODULE_NAME, |
620 | .owner = THIS_MODULE, | |
6fe07aaf FT |
621 | }, |
622 | }; | |
623 | ||
624 | static int __init mac_esp_init(void) | |
625 | { | |
cff75f1f | 626 | return platform_driver_register(&esp_mac_driver); |
6fe07aaf FT |
627 | } |
628 | ||
629 | static void __exit mac_esp_exit(void) | |
630 | { | |
631 | platform_driver_unregister(&esp_mac_driver); | |
6fe07aaf FT |
632 | } |
633 | ||
634 | MODULE_DESCRIPTION("Mac ESP SCSI driver"); | |
635 | MODULE_AUTHOR("Finn Thain <fthain@telegraphics.com.au>"); | |
839cd310 | 636 | MODULE_LICENSE("GPL v2"); |
6fe07aaf | 637 | MODULE_VERSION(DRV_VERSION); |
cff75f1f | 638 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6fe07aaf FT |
639 | |
640 | module_init(mac_esp_init); | |
641 | module_exit(mac_esp_exit); |