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-rw-r--r--arch/arm/plat-omap/mcbsp.c758
1 files changed, 758 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
new file mode 100644
index 000000000000..43567d5edddb
--- /dev/null
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -0,0 +1,758 @@
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
23#include <asm/delay.h>
24#include <asm/io.h>
25#include <asm/irq.h>
26
27#include <asm/arch/dma.h>
28#include <asm/arch/mux.h>
29#include <asm/arch/irqs.h>
30#include <asm/arch/mcbsp.h>
31
32#include <asm/hardware/clock.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
40struct 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
66static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
67static struct clk *mcbsp_dsp_ck = 0;
68static struct clk *mcbsp_api_ck = 0;
69static struct clk *mcbsp_dspxor_ck = 0;
70
71
72static 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
92static 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
102static 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
113static 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
126static 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
147void 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
169static 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#define EN_XORPCK 1
191#define DSP_RSTCT2 0xe1008014
192
193static void omap_mcbsp_dsp_request(void)
194{
195 if (cpu_is_omap1510() || cpu_is_omap16xx()) {
196 clk_use(mcbsp_dsp_ck);
197 clk_use(mcbsp_api_ck);
198
199 /* enable 12MHz clock to mcbsp 1 & 3 */
200 clk_use(mcbsp_dspxor_ck);
201 __raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
202 DSP_RSTCT2);
203 }
204}
205
206static void omap_mcbsp_dsp_free(void)
207{
208 if (cpu_is_omap1510() || cpu_is_omap16xx()) {
209 clk_unuse(mcbsp_dspxor_ck);
210 clk_unuse(mcbsp_dsp_ck);
211 clk_unuse(mcbsp_api_ck);
212 }
213}
214
215int omap_mcbsp_request(unsigned int id)
216{
217 int err;
218
219 if (omap_mcbsp_check(id) < 0)
220 return -EINVAL;
221
222 /*
223 * On 1510, 1610 and 1710, McBSP1 and McBSP3
224 * are DSP public peripherals.
225 */
226 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
227 omap_mcbsp_dsp_request();
228
229 spin_lock(&mcbsp[id].lock);
230 if (!mcbsp[id].free) {
231 printk (KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n", id + 1);
232 spin_unlock(&mcbsp[id].lock);
233 return -1;
234 }
235
236 mcbsp[id].free = 0;
237 spin_unlock(&mcbsp[id].lock);
238
239 /* We need to get IRQs here */
240 err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler, 0,
241 "McBSP",
242 (void *) (&mcbsp[id]));
243 if (err != 0) {
244 printk(KERN_ERR "OMAP-McBSP: Unable to request TX IRQ %d for McBSP%d\n",
245 mcbsp[id].tx_irq, mcbsp[id].id);
246 return err;
247 }
248
249 init_completion(&(mcbsp[id].tx_irq_completion));
250
251
252 err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler, 0,
253 "McBSP",
254 (void *) (&mcbsp[id]));
255 if (err != 0) {
256 printk(KERN_ERR "OMAP-McBSP: Unable to request RX IRQ %d for McBSP%d\n",
257 mcbsp[id].rx_irq, mcbsp[id].id);
258 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
259 return err;
260 }
261
262 init_completion(&(mcbsp[id].rx_irq_completion));
263 return 0;
264
265}
266
267void omap_mcbsp_free(unsigned int id)
268{
269 if (omap_mcbsp_check(id) < 0)
270 return;
271
272 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
273 omap_mcbsp_dsp_free();
274
275 spin_lock(&mcbsp[id].lock);
276 if (mcbsp[id].free) {
277 printk (KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n", id + 1);
278 spin_unlock(&mcbsp[id].lock);
279 return;
280 }
281
282 mcbsp[id].free = 1;
283 spin_unlock(&mcbsp[id].lock);
284
285 /* Free IRQs */
286 free_irq(mcbsp[id].rx_irq, (void *) (&mcbsp[id]));
287 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
288}
289
290/*
291 * Here we start the McBSP, by enabling the sample
292 * generator, both transmitter and receivers,
293 * and the frame sync.
294 */
295void omap_mcbsp_start(unsigned int id)
296{
297 u32 io_base;
298 u16 w;
299
300 if (omap_mcbsp_check(id) < 0)
301 return;
302
303 io_base = mcbsp[id].io_base;
304
305 mcbsp[id].rx_word_length = ((OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7);
306 mcbsp[id].tx_word_length = ((OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7);
307
308 /* Start the sample generator */
309 w = OMAP_MCBSP_READ(io_base, SPCR2);
310 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6));
311
312 /* Enable transmitter and receiver */
313 w = OMAP_MCBSP_READ(io_base, SPCR2);
314 OMAP_MCBSP_WRITE(io_base, SPCR2, w | 1);
315
316 w = OMAP_MCBSP_READ(io_base, SPCR1);
317 OMAP_MCBSP_WRITE(io_base, SPCR1, w | 1);
318
319 udelay(100);
320
321 /* Start frame sync */
322 w = OMAP_MCBSP_READ(io_base, SPCR2);
323 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));
324
325 /* Dump McBSP Regs */
326 omap_mcbsp_dump_reg(id);
327
328}
329
330void omap_mcbsp_stop(unsigned int id)
331{
332 u32 io_base;
333 u16 w;
334
335 if (omap_mcbsp_check(id) < 0)
336 return;
337
338 io_base = mcbsp[id].io_base;
339
340 /* Reset transmitter */
341 w = OMAP_MCBSP_READ(io_base, SPCR2);
342 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1));
343
344 /* Reset receiver */
345 w = OMAP_MCBSP_READ(io_base, SPCR1);
346 OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(1));
347
348 /* Reset the sample rate generator */
349 w = OMAP_MCBSP_READ(io_base, SPCR2);
350 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6));
351}
352
353
354/* polled mcbsp i/o operations */
355int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
356{
357 u32 base = mcbsp[id].io_base;
358 writew(buf, base + OMAP_MCBSP_REG_DXR1);
359 /* if frame sync error - clear the error */
360 if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) {
361 /* clear error */
362 writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR),
363 base + OMAP_MCBSP_REG_SPCR2);
364 /* resend */
365 return -1;
366 } else {
367 /* wait for transmit confirmation */
368 int attemps = 0;
369 while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) {
370 if (attemps++ > 1000) {
371 writew(readw(base + OMAP_MCBSP_REG_SPCR2) &
372 (~XRST),
373 base + OMAP_MCBSP_REG_SPCR2);
374 udelay(10);
375 writew(readw(base + OMAP_MCBSP_REG_SPCR2) |
376 (XRST),
377 base + OMAP_MCBSP_REG_SPCR2);
378 udelay(10);
379 printk(KERN_ERR
380 " Could not write to McBSP Register\n");
381 return -2;
382 }
383 }
384 }
385 return 0;
386}
387
388int omap_mcbsp_pollread(unsigned int id, u16 * buf)
389{
390 u32 base = mcbsp[id].io_base;
391 /* if frame sync error - clear the error */
392 if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) {
393 /* clear error */
394 writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR),
395 base + OMAP_MCBSP_REG_SPCR1);
396 /* resend */
397 return -1;
398 } else {
399 /* wait for recieve confirmation */
400 int attemps = 0;
401 while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) {
402 if (attemps++ > 1000) {
403 writew(readw(base + OMAP_MCBSP_REG_SPCR1) &
404 (~RRST),
405 base + OMAP_MCBSP_REG_SPCR1);
406 udelay(10);
407 writew(readw(base + OMAP_MCBSP_REG_SPCR1) |
408 (RRST),
409 base + OMAP_MCBSP_REG_SPCR1);
410 udelay(10);
411 printk(KERN_ERR
412 " Could not read from McBSP Register\n");
413 return -2;
414 }
415 }
416 }
417 *buf = readw(base + OMAP_MCBSP_REG_DRR1);
418 return 0;
419}
420
421/*
422 * IRQ based word transmission.
423 */
424void omap_mcbsp_xmit_word(unsigned int id, u32 word)
425{
426 u32 io_base;
427 omap_mcbsp_word_length word_length = mcbsp[id].tx_word_length;
428
429 if (omap_mcbsp_check(id) < 0)
430 return;
431
432 io_base = mcbsp[id].io_base;
433
434 wait_for_completion(&(mcbsp[id].tx_irq_completion));
435
436 if (word_length > OMAP_MCBSP_WORD_16)
437 OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16);
438 OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff);
439}
440
441u32 omap_mcbsp_recv_word(unsigned int id)
442{
443 u32 io_base;
444 u16 word_lsb, word_msb = 0;
445 omap_mcbsp_word_length word_length = mcbsp[id].rx_word_length;
446
447 if (omap_mcbsp_check(id) < 0)
448 return -EINVAL;
449
450 io_base = mcbsp[id].io_base;
451
452 wait_for_completion(&(mcbsp[id].rx_irq_completion));
453
454 if (word_length > OMAP_MCBSP_WORD_16)
455 word_msb = OMAP_MCBSP_READ(io_base, DRR2);
456 word_lsb = OMAP_MCBSP_READ(io_base, DRR1);
457
458 return (word_lsb | (word_msb << 16));
459}
460
461
462/*
463 * Simple DMA based buffer rx/tx routines.
464 * Nothing fancy, just a single buffer tx/rx through DMA.
465 * The DMA resources are released once the transfer is done.
466 * For anything fancier, you should use your own customized DMA
467 * routines and callbacks.
468 */
469int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
470{
471 int dma_tx_ch;
472
473 if (omap_mcbsp_check(id) < 0)
474 return -EINVAL;
475
476 if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX", omap_mcbsp_tx_dma_callback,
477 &mcbsp[id],
478 &dma_tx_ch)) {
479 printk("OMAP-McBSP: Unable to request DMA channel for McBSP%d TX. Trying IRQ based TX\n", id+1);
480 return -EAGAIN;
481 }
482 mcbsp[id].dma_tx_lch = dma_tx_ch;
483
484 DBG("TX DMA on channel %d\n", dma_tx_ch);
485
486 init_completion(&(mcbsp[id].tx_dma_completion));
487
488 omap_set_dma_transfer_params(mcbsp[id].dma_tx_lch,
489 OMAP_DMA_DATA_TYPE_S16,
490 length >> 1, 1,
491 OMAP_DMA_SYNC_ELEMENT);
492
493 omap_set_dma_dest_params(mcbsp[id].dma_tx_lch,
494 OMAP_DMA_PORT_TIPB,
495 OMAP_DMA_AMODE_CONSTANT,
496 mcbsp[id].io_base + OMAP_MCBSP_REG_DXR1);
497
498 omap_set_dma_src_params(mcbsp[id].dma_tx_lch,
499 OMAP_DMA_PORT_EMIFF,
500 OMAP_DMA_AMODE_POST_INC,
501 buffer);
502
503 omap_start_dma(mcbsp[id].dma_tx_lch);
504 wait_for_completion(&(mcbsp[id].tx_dma_completion));
505 return 0;
506}
507
508
509int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
510{
511 int dma_rx_ch;
512
513 if (omap_mcbsp_check(id) < 0)
514 return -EINVAL;
515
516 if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX", omap_mcbsp_rx_dma_callback,
517 &mcbsp[id],
518 &dma_rx_ch)) {
519 printk("Unable to request DMA channel for McBSP%d RX. Trying IRQ based RX\n", id+1);
520 return -EAGAIN;
521 }
522 mcbsp[id].dma_rx_lch = dma_rx_ch;
523
524 DBG("RX DMA on channel %d\n", dma_rx_ch);
525
526 init_completion(&(mcbsp[id].rx_dma_completion));
527
528 omap_set_dma_transfer_params(mcbsp[id].dma_rx_lch,
529 OMAP_DMA_DATA_TYPE_S16,
530 length >> 1, 1,
531 OMAP_DMA_SYNC_ELEMENT);
532
533 omap_set_dma_src_params(mcbsp[id].dma_rx_lch,
534 OMAP_DMA_PORT_TIPB,
535 OMAP_DMA_AMODE_CONSTANT,
536 mcbsp[id].io_base + OMAP_MCBSP_REG_DRR1);
537
538 omap_set_dma_dest_params(mcbsp[id].dma_rx_lch,
539 OMAP_DMA_PORT_EMIFF,
540 OMAP_DMA_AMODE_POST_INC,
541 buffer);
542
543 omap_start_dma(mcbsp[id].dma_rx_lch);
544 wait_for_completion(&(mcbsp[id].rx_dma_completion));
545 return 0;
546}
547
548
549/*
550 * SPI wrapper.
551 * Since SPI setup is much simpler than the generic McBSP one,
552 * this wrapper just need an omap_mcbsp_spi_cfg structure as an input.
553 * Once this is done, you can call omap_mcbsp_start().
554 */
555void omap_mcbsp_set_spi_mode(unsigned int id, const struct omap_mcbsp_spi_cfg * spi_cfg)
556{
557 struct omap_mcbsp_reg_cfg mcbsp_cfg;
558
559 if (omap_mcbsp_check(id) < 0)
560 return;
561
562 memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg));
563
564 /* SPI has only one frame */
565 mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0));
566 mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0));
567
568 /* Clock stop mode */
569 if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY)
570 mcbsp_cfg.spcr1 |= (1 << 12);
571 else
572 mcbsp_cfg.spcr1 |= (3 << 11);
573
574 /* Set clock parities */
575 if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING)
576 mcbsp_cfg.pcr0 |= CLKRP;
577 else
578 mcbsp_cfg.pcr0 &= ~CLKRP;
579
580 if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING)
581 mcbsp_cfg.pcr0 &= ~CLKXP;
582 else
583 mcbsp_cfg.pcr0 |= CLKXP;
584
585 /* Set SCLKME to 0 and CLKSM to 1 */
586 mcbsp_cfg.pcr0 &= ~SCLKME;
587 mcbsp_cfg.srgr2 |= CLKSM;
588
589 /* Set FSXP */
590 if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH)
591 mcbsp_cfg.pcr0 &= ~FSXP;
592 else
593 mcbsp_cfg.pcr0 |= FSXP;
594
595 if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) {
596 mcbsp_cfg.pcr0 |= CLKXM;
597 mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div -1);
598 mcbsp_cfg.pcr0 |= FSXM;
599 mcbsp_cfg.srgr2 &= ~FSGM;
600 mcbsp_cfg.xcr2 |= XDATDLY(1);
601 mcbsp_cfg.rcr2 |= RDATDLY(1);
602 }
603 else {
604 mcbsp_cfg.pcr0 &= ~CLKXM;
605 mcbsp_cfg.srgr1 |= CLKGDV(1);
606 mcbsp_cfg.pcr0 &= ~FSXM;
607 mcbsp_cfg.xcr2 &= ~XDATDLY(3);
608 mcbsp_cfg.rcr2 &= ~RDATDLY(3);
609 }
610
611 mcbsp_cfg.xcr2 &= ~XPHASE;
612 mcbsp_cfg.rcr2 &= ~RPHASE;
613
614 omap_mcbsp_config(id, &mcbsp_cfg);
615}
616
617
618/*
619 * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
620 * 730 has only 2 McBSP, and both of them are MPU peripherals.
621 */
622struct omap_mcbsp_info {
623 u32 virt_base;
624 u8 dma_rx_sync, dma_tx_sync;
625 u16 rx_irq, tx_irq;
626};
627
628#ifdef CONFIG_ARCH_OMAP730
629static const struct omap_mcbsp_info mcbsp_730[] = {
630 [0] = { .virt_base = io_p2v(OMAP730_MCBSP1_BASE),
631 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
632 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
633 .rx_irq = INT_730_McBSP1RX,
634 .tx_irq = INT_730_McBSP1TX },
635 [1] = { .virt_base = io_p2v(OMAP730_MCBSP2_BASE),
636 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
637 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
638 .rx_irq = INT_730_McBSP2RX,
639 .tx_irq = INT_730_McBSP2TX },
640};
641#endif
642
643#ifdef CONFIG_ARCH_OMAP1510
644static const struct omap_mcbsp_info mcbsp_1510[] = {
645 [0] = { .virt_base = OMAP1510_MCBSP1_BASE,
646 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
647 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
648 .rx_irq = INT_McBSP1RX,
649 .tx_irq = INT_McBSP1TX },
650 [1] = { .virt_base = io_p2v(OMAP1510_MCBSP2_BASE),
651 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
652 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
653 .rx_irq = INT_1510_SPI_RX,
654 .tx_irq = INT_1510_SPI_TX },
655 [2] = { .virt_base = OMAP1510_MCBSP3_BASE,
656 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
657 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
658 .rx_irq = INT_McBSP3RX,
659 .tx_irq = INT_McBSP3TX },
660};
661#endif
662
663#if defined(CONFIG_ARCH_OMAP16XX)
664static const struct omap_mcbsp_info mcbsp_1610[] = {
665 [0] = { .virt_base = OMAP1610_MCBSP1_BASE,
666 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
667 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
668 .rx_irq = INT_McBSP1RX,
669 .tx_irq = INT_McBSP1TX },
670 [1] = { .virt_base = io_p2v(OMAP1610_MCBSP2_BASE),
671 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
672 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
673 .rx_irq = INT_1610_McBSP2_RX,
674 .tx_irq = INT_1610_McBSP2_TX },
675 [2] = { .virt_base = OMAP1610_MCBSP3_BASE,
676 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
677 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
678 .rx_irq = INT_McBSP3RX,
679 .tx_irq = INT_McBSP3TX },
680};
681#endif
682
683static int __init omap_mcbsp_init(void)
684{
685 int mcbsp_count = 0, i;
686 static const struct omap_mcbsp_info *mcbsp_info;
687
688 printk("Initializing OMAP McBSP system\n");
689
690 mcbsp_dsp_ck = clk_get(0, "dsp_ck");
691 if (IS_ERR(mcbsp_dsp_ck)) {
692 printk(KERN_ERR "mcbsp: could not acquire dsp_ck handle.\n");
693 return PTR_ERR(mcbsp_dsp_ck);
694 }
695 mcbsp_api_ck = clk_get(0, "api_ck");
696 if (IS_ERR(mcbsp_api_ck)) {
697 printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
698 return PTR_ERR(mcbsp_api_ck);
699 }
700 mcbsp_dspxor_ck = clk_get(0, "dspxor_ck");
701 if (IS_ERR(mcbsp_dspxor_ck)) {
702 printk(KERN_ERR "mcbsp: could not acquire dspxor_ck handle.\n");
703 return PTR_ERR(mcbsp_dspxor_ck);
704 }
705
706#ifdef CONFIG_ARCH_OMAP730
707 if (cpu_is_omap730()) {
708 mcbsp_info = mcbsp_730;
709 mcbsp_count = ARRAY_SIZE(mcbsp_730);
710 }
711#endif
712#ifdef CONFIG_ARCH_OMAP1510
713 if (cpu_is_omap1510()) {
714 mcbsp_info = mcbsp_1510;
715 mcbsp_count = ARRAY_SIZE(mcbsp_1510);
716 }
717#endif
718#if defined(CONFIG_ARCH_OMAP16XX)
719 if (cpu_is_omap16xx()) {
720 mcbsp_info = mcbsp_1610;
721 mcbsp_count = ARRAY_SIZE(mcbsp_1610);
722 }
723#endif
724 for (i = 0; i < OMAP_MAX_MCBSP_COUNT ; i++) {
725 if (i >= mcbsp_count) {
726 mcbsp[i].io_base = 0;
727 mcbsp[i].free = 0;
728 continue;
729 }
730 mcbsp[i].id = i + 1;
731 mcbsp[i].free = 1;
732 mcbsp[i].dma_tx_lch = -1;
733 mcbsp[i].dma_rx_lch = -1;
734
735 mcbsp[i].io_base = mcbsp_info[i].virt_base;
736 mcbsp[i].tx_irq = mcbsp_info[i].tx_irq;
737 mcbsp[i].rx_irq = mcbsp_info[i].rx_irq;
738 mcbsp[i].dma_rx_sync = mcbsp_info[i].dma_rx_sync;
739 mcbsp[i].dma_tx_sync = mcbsp_info[i].dma_tx_sync;
740 spin_lock_init(&mcbsp[i].lock);
741 }
742
743 return 0;
744}
745
746
747arch_initcall(omap_mcbsp_init);
748
749EXPORT_SYMBOL(omap_mcbsp_config);
750EXPORT_SYMBOL(omap_mcbsp_request);
751EXPORT_SYMBOL(omap_mcbsp_free);
752EXPORT_SYMBOL(omap_mcbsp_start);
753EXPORT_SYMBOL(omap_mcbsp_stop);
754EXPORT_SYMBOL(omap_mcbsp_xmit_word);
755EXPORT_SYMBOL(omap_mcbsp_recv_word);
756EXPORT_SYMBOL(omap_mcbsp_xmit_buffer);
757EXPORT_SYMBOL(omap_mcbsp_recv_buffer);
758EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 22:53:23 -0500