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ARM: OMAP: 4/4 Fix clock framework to use clk_enable/disable misc
[deliverable/linux.git] / arch / arm / plat-omap / mcbsp.c
1 /*
2 * linux/arch/arm/plat-omap/mcbsp.c
3 *
4 * Copyright (C) 2004 Nokia Corporation
5 * Author: Samuel Ortiz <samuel.ortiz@nokia.com>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Multichannel mode not supported.
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/device.h>
18 #include <linux/wait.h>
19 #include <linux/completion.h>
20 #include <linux/interrupt.h>
21 #include <linux/err.h>
22 #include <linux/clk.h>
23
24 #include <asm/delay.h>
25 #include <asm/io.h>
26 #include <asm/irq.h>
27
28 #include <asm/arch/dma.h>
29 #include <asm/arch/mux.h>
30 #include <asm/arch/irqs.h>
31 #include <asm/arch/dsp_common.h>
32 #include <asm/arch/mcbsp.h>
33
34 #ifdef CONFIG_MCBSP_DEBUG
35 #define DBG(x...) printk(x)
36 #else
37 #define DBG(x...) do { } while (0)
38 #endif
39
40 struct omap_mcbsp {
41 u32 io_base;
42 u8 id;
43 u8 free;
44 omap_mcbsp_word_length rx_word_length;
45 omap_mcbsp_word_length tx_word_length;
46
47 /* IRQ based TX/RX */
48 int rx_irq;
49 int tx_irq;
50
51 /* DMA stuff */
52 u8 dma_rx_sync;
53 short dma_rx_lch;
54 u8 dma_tx_sync;
55 short dma_tx_lch;
56
57 /* Completion queues */
58 struct completion tx_irq_completion;
59 struct completion rx_irq_completion;
60 struct completion tx_dma_completion;
61 struct completion rx_dma_completion;
62
63 spinlock_t lock;
64 };
65
66 static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
67 static struct clk *mcbsp_dsp_ck = 0;
68 static struct clk *mcbsp_api_ck = 0;
69 static struct clk *mcbsp_dspxor_ck = 0;
70
71
72 static void omap_mcbsp_dump_reg(u8 id)
73 {
74 DBG("**** MCBSP%d regs ****\n", mcbsp[id].id);
75 DBG("DRR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR2));
76 DBG("DRR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR1));
77 DBG("DXR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR2));
78 DBG("DXR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR1));
79 DBG("SPCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR2));
80 DBG("SPCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR1));
81 DBG("RCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR2));
82 DBG("RCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR1));
83 DBG("XCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR2));
84 DBG("XCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR1));
85 DBG("SRGR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR2));
86 DBG("SRGR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR1));
87 DBG("PCR0: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, PCR0));
88 DBG("***********************\n");
89 }
90
91
92 static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
93 {
94 struct omap_mcbsp * mcbsp_tx = (struct omap_mcbsp *)(dev_id);
95
96 DBG("TX IRQ callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2));
97
98 complete(&mcbsp_tx->tx_irq_completion);
99 return IRQ_HANDLED;
100 }
101
102 static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
103 {
104 struct omap_mcbsp * mcbsp_rx = (struct omap_mcbsp *)(dev_id);
105
106 DBG("RX IRQ callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR2));
107
108 complete(&mcbsp_rx->rx_irq_completion);
109 return IRQ_HANDLED;
110 }
111
112
113 static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data)
114 {
115 struct omap_mcbsp * mcbsp_dma_tx = (struct omap_mcbsp *)(data);
116
117 DBG("TX DMA callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2));
118
119 /* We can free the channels */
120 omap_free_dma(mcbsp_dma_tx->dma_tx_lch);
121 mcbsp_dma_tx->dma_tx_lch = -1;
122
123 complete(&mcbsp_dma_tx->tx_dma_completion);
124 }
125
126 static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data)
127 {
128 struct omap_mcbsp * mcbsp_dma_rx = (struct omap_mcbsp *)(data);
129
130 DBG("RX DMA callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2));
131
132 /* We can free the channels */
133 omap_free_dma(mcbsp_dma_rx->dma_rx_lch);
134 mcbsp_dma_rx->dma_rx_lch = -1;
135
136 complete(&mcbsp_dma_rx->rx_dma_completion);
137 }
138
139
140 /*
141 * omap_mcbsp_config simply write a config to the
142 * appropriate McBSP.
143 * You either call this function or set the McBSP registers
144 * by yourself before calling omap_mcbsp_start().
145 */
146
147 void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg * config)
148 {
149 u32 io_base = mcbsp[id].io_base;
150
151 DBG("OMAP-McBSP: McBSP%d io_base: 0x%8x\n", id+1, io_base);
152
153 /* We write the given config */
154 OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2);
155 OMAP_MCBSP_WRITE(io_base, SPCR1, config->spcr1);
156 OMAP_MCBSP_WRITE(io_base, RCR2, config->rcr2);
157 OMAP_MCBSP_WRITE(io_base, RCR1, config->rcr1);
158 OMAP_MCBSP_WRITE(io_base, XCR2, config->xcr2);
159 OMAP_MCBSP_WRITE(io_base, XCR1, config->xcr1);
160 OMAP_MCBSP_WRITE(io_base, SRGR2, config->srgr2);
161 OMAP_MCBSP_WRITE(io_base, SRGR1, config->srgr1);
162 OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2);
163 OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1);
164 OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0);
165 }
166
167
168
169 static int omap_mcbsp_check(unsigned int id)
170 {
171 if (cpu_is_omap730()) {
172 if (id > OMAP_MAX_MCBSP_COUNT - 1) {
173 printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
174 return -1;
175 }
176 return 0;
177 }
178
179 if (cpu_is_omap1510() || cpu_is_omap16xx()) {
180 if (id > OMAP_MAX_MCBSP_COUNT) {
181 printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
182 return -1;
183 }
184 return 0;
185 }
186
187 return -1;
188 }
189
190 static void omap_mcbsp_dsp_request(void)
191 {
192 if (cpu_is_omap1510() || cpu_is_omap16xx()) {
193 clk_enable(mcbsp_dsp_ck);
194 clk_enable(mcbsp_api_ck);
195
196 /* enable 12MHz clock to mcbsp 1 & 3 */
197 clk_enable(mcbsp_dspxor_ck);
198
199 /*
200 * DSP external peripheral reset
201 * FIXME: This should be moved to dsp code
202 */
203 __raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
204 DSP_RSTCT2);
205 }
206 }
207
208 static void omap_mcbsp_dsp_free(void)
209 {
210 if (cpu_is_omap1510() || cpu_is_omap16xx()) {
211 clk_disable(mcbsp_dspxor_ck);
212 clk_disable(mcbsp_dsp_ck);
213 clk_disable(mcbsp_api_ck);
214 }
215 }
216
217 int omap_mcbsp_request(unsigned int id)
218 {
219 int err;
220
221 if (omap_mcbsp_check(id) < 0)
222 return -EINVAL;
223
224 /*
225 * On 1510, 1610 and 1710, McBSP1 and McBSP3
226 * are DSP public peripherals.
227 */
228 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
229 omap_mcbsp_dsp_request();
230
231 spin_lock(&mcbsp[id].lock);
232 if (!mcbsp[id].free) {
233 printk (KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n", id + 1);
234 spin_unlock(&mcbsp[id].lock);
235 return -1;
236 }
237
238 mcbsp[id].free = 0;
239 spin_unlock(&mcbsp[id].lock);
240
241 /* We need to get IRQs here */
242 err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler, 0,
243 "McBSP",
244 (void *) (&mcbsp[id]));
245 if (err != 0) {
246 printk(KERN_ERR "OMAP-McBSP: Unable to request TX IRQ %d for McBSP%d\n",
247 mcbsp[id].tx_irq, mcbsp[id].id);
248 return err;
249 }
250
251 init_completion(&(mcbsp[id].tx_irq_completion));
252
253
254 err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler, 0,
255 "McBSP",
256 (void *) (&mcbsp[id]));
257 if (err != 0) {
258 printk(KERN_ERR "OMAP-McBSP: Unable to request RX IRQ %d for McBSP%d\n",
259 mcbsp[id].rx_irq, mcbsp[id].id);
260 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
261 return err;
262 }
263
264 init_completion(&(mcbsp[id].rx_irq_completion));
265 return 0;
266
267 }
268
269 void omap_mcbsp_free(unsigned int id)
270 {
271 if (omap_mcbsp_check(id) < 0)
272 return;
273
274 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
275 omap_mcbsp_dsp_free();
276
277 spin_lock(&mcbsp[id].lock);
278 if (mcbsp[id].free) {
279 printk (KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n", id + 1);
280 spin_unlock(&mcbsp[id].lock);
281 return;
282 }
283
284 mcbsp[id].free = 1;
285 spin_unlock(&mcbsp[id].lock);
286
287 /* Free IRQs */
288 free_irq(mcbsp[id].rx_irq, (void *) (&mcbsp[id]));
289 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
290 }
291
292 /*
293 * Here we start the McBSP, by enabling the sample
294 * generator, both transmitter and receivers,
295 * and the frame sync.
296 */
297 void omap_mcbsp_start(unsigned int id)
298 {
299 u32 io_base;
300 u16 w;
301
302 if (omap_mcbsp_check(id) < 0)
303 return;
304
305 io_base = mcbsp[id].io_base;
306
307 mcbsp[id].rx_word_length = ((OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7);
308 mcbsp[id].tx_word_length = ((OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7);
309
310 /* Start the sample generator */
311 w = OMAP_MCBSP_READ(io_base, SPCR2);
312 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6));
313
314 /* Enable transmitter and receiver */
315 w = OMAP_MCBSP_READ(io_base, SPCR2);
316 OMAP_MCBSP_WRITE(io_base, SPCR2, w | 1);
317
318 w = OMAP_MCBSP_READ(io_base, SPCR1);
319 OMAP_MCBSP_WRITE(io_base, SPCR1, w | 1);
320
321 udelay(100);
322
323 /* Start frame sync */
324 w = OMAP_MCBSP_READ(io_base, SPCR2);
325 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));
326
327 /* Dump McBSP Regs */
328 omap_mcbsp_dump_reg(id);
329
330 }
331
332 void omap_mcbsp_stop(unsigned int id)
333 {
334 u32 io_base;
335 u16 w;
336
337 if (omap_mcbsp_check(id) < 0)
338 return;
339
340 io_base = mcbsp[id].io_base;
341
342 /* Reset transmitter */
343 w = OMAP_MCBSP_READ(io_base, SPCR2);
344 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1));
345
346 /* Reset receiver */
347 w = OMAP_MCBSP_READ(io_base, SPCR1);
348 OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(1));
349
350 /* Reset the sample rate generator */
351 w = OMAP_MCBSP_READ(io_base, SPCR2);
352 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6));
353 }
354
355
356 /* polled mcbsp i/o operations */
357 int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
358 {
359 u32 base = mcbsp[id].io_base;
360 writew(buf, base + OMAP_MCBSP_REG_DXR1);
361 /* if frame sync error - clear the error */
362 if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) {
363 /* clear error */
364 writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR),
365 base + OMAP_MCBSP_REG_SPCR2);
366 /* resend */
367 return -1;
368 } else {
369 /* wait for transmit confirmation */
370 int attemps = 0;
371 while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) {
372 if (attemps++ > 1000) {
373 writew(readw(base + OMAP_MCBSP_REG_SPCR2) &
374 (~XRST),
375 base + OMAP_MCBSP_REG_SPCR2);
376 udelay(10);
377 writew(readw(base + OMAP_MCBSP_REG_SPCR2) |
378 (XRST),
379 base + OMAP_MCBSP_REG_SPCR2);
380 udelay(10);
381 printk(KERN_ERR
382 " Could not write to McBSP Register\n");
383 return -2;
384 }
385 }
386 }
387 return 0;
388 }
389
390 int omap_mcbsp_pollread(unsigned int id, u16 * buf)
391 {
392 u32 base = mcbsp[id].io_base;
393 /* if frame sync error - clear the error */
394 if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) {
395 /* clear error */
396 writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR),
397 base + OMAP_MCBSP_REG_SPCR1);
398 /* resend */
399 return -1;
400 } else {
401 /* wait for recieve confirmation */
402 int attemps = 0;
403 while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) {
404 if (attemps++ > 1000) {
405 writew(readw(base + OMAP_MCBSP_REG_SPCR1) &
406 (~RRST),
407 base + OMAP_MCBSP_REG_SPCR1);
408 udelay(10);
409 writew(readw(base + OMAP_MCBSP_REG_SPCR1) |
410 (RRST),
411 base + OMAP_MCBSP_REG_SPCR1);
412 udelay(10);
413 printk(KERN_ERR
414 " Could not read from McBSP Register\n");
415 return -2;
416 }
417 }
418 }
419 *buf = readw(base + OMAP_MCBSP_REG_DRR1);
420 return 0;
421 }
422
423 /*
424 * IRQ based word transmission.
425 */
426 void omap_mcbsp_xmit_word(unsigned int id, u32 word)
427 {
428 u32 io_base;
429 omap_mcbsp_word_length word_length = mcbsp[id].tx_word_length;
430
431 if (omap_mcbsp_check(id) < 0)
432 return;
433
434 io_base = mcbsp[id].io_base;
435
436 wait_for_completion(&(mcbsp[id].tx_irq_completion));
437
438 if (word_length > OMAP_MCBSP_WORD_16)
439 OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16);
440 OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff);
441 }
442
443 u32 omap_mcbsp_recv_word(unsigned int id)
444 {
445 u32 io_base;
446 u16 word_lsb, word_msb = 0;
447 omap_mcbsp_word_length word_length = mcbsp[id].rx_word_length;
448
449 if (omap_mcbsp_check(id) < 0)
450 return -EINVAL;
451
452 io_base = mcbsp[id].io_base;
453
454 wait_for_completion(&(mcbsp[id].rx_irq_completion));
455
456 if (word_length > OMAP_MCBSP_WORD_16)
457 word_msb = OMAP_MCBSP_READ(io_base, DRR2);
458 word_lsb = OMAP_MCBSP_READ(io_base, DRR1);
459
460 return (word_lsb | (word_msb << 16));
461 }
462
463
464 /*
465 * Simple DMA based buffer rx/tx routines.
466 * Nothing fancy, just a single buffer tx/rx through DMA.
467 * The DMA resources are released once the transfer is done.
468 * For anything fancier, you should use your own customized DMA
469 * routines and callbacks.
470 */
471 int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
472 {
473 int dma_tx_ch;
474
475 if (omap_mcbsp_check(id) < 0)
476 return -EINVAL;
477
478 if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX", omap_mcbsp_tx_dma_callback,
479 &mcbsp[id],
480 &dma_tx_ch)) {
481 printk("OMAP-McBSP: Unable to request DMA channel for McBSP%d TX. Trying IRQ based TX\n", id+1);
482 return -EAGAIN;
483 }
484 mcbsp[id].dma_tx_lch = dma_tx_ch;
485
486 DBG("TX DMA on channel %d\n", dma_tx_ch);
487
488 init_completion(&(mcbsp[id].tx_dma_completion));
489
490 omap_set_dma_transfer_params(mcbsp[id].dma_tx_lch,
491 OMAP_DMA_DATA_TYPE_S16,
492 length >> 1, 1,
493 OMAP_DMA_SYNC_ELEMENT,
494 0, 0);
495
496 omap_set_dma_dest_params(mcbsp[id].dma_tx_lch,
497 OMAP_DMA_PORT_TIPB,
498 OMAP_DMA_AMODE_CONSTANT,
499 mcbsp[id].io_base + OMAP_MCBSP_REG_DXR1,
500 0, 0);
501
502 omap_set_dma_src_params(mcbsp[id].dma_tx_lch,
503 OMAP_DMA_PORT_EMIFF,
504 OMAP_DMA_AMODE_POST_INC,
505 buffer,
506 0, 0);
507
508 omap_start_dma(mcbsp[id].dma_tx_lch);
509 wait_for_completion(&(mcbsp[id].tx_dma_completion));
510 return 0;
511 }
512
513
514 int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
515 {
516 int dma_rx_ch;
517
518 if (omap_mcbsp_check(id) < 0)
519 return -EINVAL;
520
521 if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX", omap_mcbsp_rx_dma_callback,
522 &mcbsp[id],
523 &dma_rx_ch)) {
524 printk("Unable to request DMA channel for McBSP%d RX. Trying IRQ based RX\n", id+1);
525 return -EAGAIN;
526 }
527 mcbsp[id].dma_rx_lch = dma_rx_ch;
528
529 DBG("RX DMA on channel %d\n", dma_rx_ch);
530
531 init_completion(&(mcbsp[id].rx_dma_completion));
532
533 omap_set_dma_transfer_params(mcbsp[id].dma_rx_lch,
534 OMAP_DMA_DATA_TYPE_S16,
535 length >> 1, 1,
536 OMAP_DMA_SYNC_ELEMENT,
537 0, 0);
538
539 omap_set_dma_src_params(mcbsp[id].dma_rx_lch,
540 OMAP_DMA_PORT_TIPB,
541 OMAP_DMA_AMODE_CONSTANT,
542 mcbsp[id].io_base + OMAP_MCBSP_REG_DRR1,
543 0, 0);
544
545 omap_set_dma_dest_params(mcbsp[id].dma_rx_lch,
546 OMAP_DMA_PORT_EMIFF,
547 OMAP_DMA_AMODE_POST_INC,
548 buffer,
549 0, 0);
550
551 omap_start_dma(mcbsp[id].dma_rx_lch);
552 wait_for_completion(&(mcbsp[id].rx_dma_completion));
553 return 0;
554 }
555
556
557 /*
558 * SPI wrapper.
559 * Since SPI setup is much simpler than the generic McBSP one,
560 * this wrapper just need an omap_mcbsp_spi_cfg structure as an input.
561 * Once this is done, you can call omap_mcbsp_start().
562 */
563 void omap_mcbsp_set_spi_mode(unsigned int id, const struct omap_mcbsp_spi_cfg * spi_cfg)
564 {
565 struct omap_mcbsp_reg_cfg mcbsp_cfg;
566
567 if (omap_mcbsp_check(id) < 0)
568 return;
569
570 memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg));
571
572 /* SPI has only one frame */
573 mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0));
574 mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0));
575
576 /* Clock stop mode */
577 if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY)
578 mcbsp_cfg.spcr1 |= (1 << 12);
579 else
580 mcbsp_cfg.spcr1 |= (3 << 11);
581
582 /* Set clock parities */
583 if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING)
584 mcbsp_cfg.pcr0 |= CLKRP;
585 else
586 mcbsp_cfg.pcr0 &= ~CLKRP;
587
588 if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING)
589 mcbsp_cfg.pcr0 &= ~CLKXP;
590 else
591 mcbsp_cfg.pcr0 |= CLKXP;
592
593 /* Set SCLKME to 0 and CLKSM to 1 */
594 mcbsp_cfg.pcr0 &= ~SCLKME;
595 mcbsp_cfg.srgr2 |= CLKSM;
596
597 /* Set FSXP */
598 if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH)
599 mcbsp_cfg.pcr0 &= ~FSXP;
600 else
601 mcbsp_cfg.pcr0 |= FSXP;
602
603 if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) {
604 mcbsp_cfg.pcr0 |= CLKXM;
605 mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div -1);
606 mcbsp_cfg.pcr0 |= FSXM;
607 mcbsp_cfg.srgr2 &= ~FSGM;
608 mcbsp_cfg.xcr2 |= XDATDLY(1);
609 mcbsp_cfg.rcr2 |= RDATDLY(1);
610 }
611 else {
612 mcbsp_cfg.pcr0 &= ~CLKXM;
613 mcbsp_cfg.srgr1 |= CLKGDV(1);
614 mcbsp_cfg.pcr0 &= ~FSXM;
615 mcbsp_cfg.xcr2 &= ~XDATDLY(3);
616 mcbsp_cfg.rcr2 &= ~RDATDLY(3);
617 }
618
619 mcbsp_cfg.xcr2 &= ~XPHASE;
620 mcbsp_cfg.rcr2 &= ~RPHASE;
621
622 omap_mcbsp_config(id, &mcbsp_cfg);
623 }
624
625
626 /*
627 * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
628 * 730 has only 2 McBSP, and both of them are MPU peripherals.
629 */
630 struct omap_mcbsp_info {
631 u32 virt_base;
632 u8 dma_rx_sync, dma_tx_sync;
633 u16 rx_irq, tx_irq;
634 };
635
636 #ifdef CONFIG_ARCH_OMAP730
637 static const struct omap_mcbsp_info mcbsp_730[] = {
638 [0] = { .virt_base = io_p2v(OMAP730_MCBSP1_BASE),
639 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
640 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
641 .rx_irq = INT_730_McBSP1RX,
642 .tx_irq = INT_730_McBSP1TX },
643 [1] = { .virt_base = io_p2v(OMAP730_MCBSP2_BASE),
644 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
645 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
646 .rx_irq = INT_730_McBSP2RX,
647 .tx_irq = INT_730_McBSP2TX },
648 };
649 #endif
650
651 #ifdef CONFIG_ARCH_OMAP15XX
652 static const struct omap_mcbsp_info mcbsp_1510[] = {
653 [0] = { .virt_base = OMAP1510_MCBSP1_BASE,
654 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
655 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
656 .rx_irq = INT_McBSP1RX,
657 .tx_irq = INT_McBSP1TX },
658 [1] = { .virt_base = io_p2v(OMAP1510_MCBSP2_BASE),
659 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
660 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
661 .rx_irq = INT_1510_SPI_RX,
662 .tx_irq = INT_1510_SPI_TX },
663 [2] = { .virt_base = OMAP1510_MCBSP3_BASE,
664 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
665 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
666 .rx_irq = INT_McBSP3RX,
667 .tx_irq = INT_McBSP3TX },
668 };
669 #endif
670
671 #if defined(CONFIG_ARCH_OMAP16XX)
672 static const struct omap_mcbsp_info mcbsp_1610[] = {
673 [0] = { .virt_base = OMAP1610_MCBSP1_BASE,
674 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
675 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
676 .rx_irq = INT_McBSP1RX,
677 .tx_irq = INT_McBSP1TX },
678 [1] = { .virt_base = io_p2v(OMAP1610_MCBSP2_BASE),
679 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
680 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
681 .rx_irq = INT_1610_McBSP2_RX,
682 .tx_irq = INT_1610_McBSP2_TX },
683 [2] = { .virt_base = OMAP1610_MCBSP3_BASE,
684 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
685 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
686 .rx_irq = INT_McBSP3RX,
687 .tx_irq = INT_McBSP3TX },
688 };
689 #endif
690
691 static int __init omap_mcbsp_init(void)
692 {
693 int mcbsp_count = 0, i;
694 static const struct omap_mcbsp_info *mcbsp_info;
695
696 printk("Initializing OMAP McBSP system\n");
697
698 mcbsp_dsp_ck = clk_get(0, "dsp_ck");
699 if (IS_ERR(mcbsp_dsp_ck)) {
700 printk(KERN_ERR "mcbsp: could not acquire dsp_ck handle.\n");
701 return PTR_ERR(mcbsp_dsp_ck);
702 }
703 mcbsp_api_ck = clk_get(0, "api_ck");
704 if (IS_ERR(mcbsp_api_ck)) {
705 printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
706 return PTR_ERR(mcbsp_api_ck);
707 }
708 mcbsp_dspxor_ck = clk_get(0, "dspxor_ck");
709 if (IS_ERR(mcbsp_dspxor_ck)) {
710 printk(KERN_ERR "mcbsp: could not acquire dspxor_ck handle.\n");
711 return PTR_ERR(mcbsp_dspxor_ck);
712 }
713
714 #ifdef CONFIG_ARCH_OMAP730
715 if (cpu_is_omap730()) {
716 mcbsp_info = mcbsp_730;
717 mcbsp_count = ARRAY_SIZE(mcbsp_730);
718 }
719 #endif
720 #ifdef CONFIG_ARCH_OMAP15XX
721 if (cpu_is_omap1510()) {
722 mcbsp_info = mcbsp_1510;
723 mcbsp_count = ARRAY_SIZE(mcbsp_1510);
724 }
725 #endif
726 #if defined(CONFIG_ARCH_OMAP16XX)
727 if (cpu_is_omap16xx()) {
728 mcbsp_info = mcbsp_1610;
729 mcbsp_count = ARRAY_SIZE(mcbsp_1610);
730 }
731 #endif
732 for (i = 0; i < OMAP_MAX_MCBSP_COUNT ; i++) {
733 if (i >= mcbsp_count) {
734 mcbsp[i].io_base = 0;
735 mcbsp[i].free = 0;
736 continue;
737 }
738 mcbsp[i].id = i + 1;
739 mcbsp[i].free = 1;
740 mcbsp[i].dma_tx_lch = -1;
741 mcbsp[i].dma_rx_lch = -1;
742
743 mcbsp[i].io_base = mcbsp_info[i].virt_base;
744 mcbsp[i].tx_irq = mcbsp_info[i].tx_irq;
745 mcbsp[i].rx_irq = mcbsp_info[i].rx_irq;
746 mcbsp[i].dma_rx_sync = mcbsp_info[i].dma_rx_sync;
747 mcbsp[i].dma_tx_sync = mcbsp_info[i].dma_tx_sync;
748 spin_lock_init(&mcbsp[i].lock);
749 }
750
751 return 0;
752 }
753
754
755 arch_initcall(omap_mcbsp_init);
756
757 EXPORT_SYMBOL(omap_mcbsp_config);
758 EXPORT_SYMBOL(omap_mcbsp_request);
759 EXPORT_SYMBOL(omap_mcbsp_free);
760 EXPORT_SYMBOL(omap_mcbsp_start);
761 EXPORT_SYMBOL(omap_mcbsp_stop);
762 EXPORT_SYMBOL(omap_mcbsp_xmit_word);
763 EXPORT_SYMBOL(omap_mcbsp_recv_word);
764 EXPORT_SYMBOL(omap_mcbsp_xmit_buffer);
765 EXPORT_SYMBOL(omap_mcbsp_recv_buffer);
766 EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
Linux kernel - Deliverables
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