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-rw-r--r--arch/arm/mach-omap/mcbsp.c685
1 files changed, 685 insertions, 0 deletions
diff --git a/arch/arm/mach-omap/mcbsp.c b/arch/arm/mach-omap/mcbsp.c
new file mode 100644
index 000000000000..7c4ad7713091
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+++ b/arch/arm/mach-omap/mcbsp.c
@@ -0,0 +1,685 @@
1/*
2 * linux/arch/arm/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;
69
70
71static void omap_mcbsp_dump_reg(u8 id)
72{
73 DBG("**** MCBSP%d regs ****\n", mcbsp[id].id);
74 DBG("DRR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR2));
75 DBG("DRR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DRR1));
76 DBG("DXR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR2));
77 DBG("DXR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, DXR1));
78 DBG("SPCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR2));
79 DBG("SPCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SPCR1));
80 DBG("RCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR2));
81 DBG("RCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, RCR1));
82 DBG("XCR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR2));
83 DBG("XCR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, XCR1));
84 DBG("SRGR2: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR2));
85 DBG("SRGR1: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, SRGR1));
86 DBG("PCR0: 0x%04x\n", OMAP_MCBSP_READ(mcbsp[id].io_base, PCR0));
87 DBG("***********************\n");
88}
89
90
91static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
92{
93 struct omap_mcbsp * mcbsp_tx = (struct omap_mcbsp *)(dev_id);
94
95 DBG("TX IRQ callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2));
96
97 complete(&mcbsp_tx->tx_irq_completion);
98 return IRQ_HANDLED;
99}
100
101static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id, struct pt_regs *regs)
102{
103 struct omap_mcbsp * mcbsp_rx = (struct omap_mcbsp *)(dev_id);
104
105 DBG("RX IRQ callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR2));
106
107 complete(&mcbsp_rx->rx_irq_completion);
108 return IRQ_HANDLED;
109}
110
111
112static void omap_mcbsp_tx_dma_callback(int lch, u16 ch_status, void *data)
113{
114 struct omap_mcbsp * mcbsp_dma_tx = (struct omap_mcbsp *)(data);
115
116 DBG("TX DMA callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_dma_tx->io_base, SPCR2));
117
118 /* We can free the channels */
119 omap_free_dma(mcbsp_dma_tx->dma_tx_lch);
120 mcbsp_dma_tx->dma_tx_lch = -1;
121
122 complete(&mcbsp_dma_tx->tx_dma_completion);
123}
124
125static void omap_mcbsp_rx_dma_callback(int lch, u16 ch_status, void *data)
126{
127 struct omap_mcbsp * mcbsp_dma_rx = (struct omap_mcbsp *)(data);
128
129 DBG("RX DMA callback : 0x%x\n", OMAP_MCBSP_READ(mcbsp_dma_rx->io_base, SPCR2));
130
131 /* We can free the channels */
132 omap_free_dma(mcbsp_dma_rx->dma_rx_lch);
133 mcbsp_dma_rx->dma_rx_lch = -1;
134
135 complete(&mcbsp_dma_rx->rx_dma_completion);
136}
137
138
139/*
140 * omap_mcbsp_config simply write a config to the
141 * appropriate McBSP.
142 * You either call this function or set the McBSP registers
143 * by yourself before calling omap_mcbsp_start().
144 */
145
146void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg * config)
147{
148 u32 io_base = mcbsp[id].io_base;
149
150 DBG("OMAP-McBSP: McBSP%d io_base: 0x%8x\n", id+1, io_base);
151
152 /* We write the given config */
153 OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2);
154 OMAP_MCBSP_WRITE(io_base, SPCR1, config->spcr1);
155 OMAP_MCBSP_WRITE(io_base, RCR2, config->rcr2);
156 OMAP_MCBSP_WRITE(io_base, RCR1, config->rcr1);
157 OMAP_MCBSP_WRITE(io_base, XCR2, config->xcr2);
158 OMAP_MCBSP_WRITE(io_base, XCR1, config->xcr1);
159 OMAP_MCBSP_WRITE(io_base, SRGR2, config->srgr2);
160 OMAP_MCBSP_WRITE(io_base, SRGR1, config->srgr1);
161 OMAP_MCBSP_WRITE(io_base, MCR2, config->mcr2);
162 OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1);
163 OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0);
164}
165
166
167
168static int omap_mcbsp_check(unsigned int id)
169{
170 if (cpu_is_omap730()) {
171 if (id > OMAP_MAX_MCBSP_COUNT - 1) {
172 printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
173 return -1;
174 }
175 return 0;
176 }
177
178 if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
179 if (id > OMAP_MAX_MCBSP_COUNT) {
180 printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
181 return -1;
182 }
183 return 0;
184 }
185
186 return -1;
187}
188
189#define EN_XORPCK 1
190#define DSP_RSTCT2 0xe1008014
191
192static void omap_mcbsp_dsp_request(void)
193{
194 if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
195 omap_writew((omap_readw(ARM_RSTCT1) | (1 << 1) | (1 << 2)),
196 ARM_RSTCT1);
197 clk_enable(mcbsp_dsp_ck);
198 clk_enable(mcbsp_api_ck);
199
200 /* enable 12MHz clock to mcbsp 1 & 3 */
201 __raw_writew(__raw_readw(DSP_IDLECT2) | (1 << EN_XORPCK),
202 DSP_IDLECT2);
203 __raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
204 DSP_RSTCT2);
205 }
206}
207
208static void omap_mcbsp_dsp_free(void)
209{
210 /* Useless for now */
211}
212
213
214int omap_mcbsp_request(unsigned int id)
215{
216 int err;
217
218 if (omap_mcbsp_check(id) < 0)
219 return -EINVAL;
220
221 /*
222 * On 1510, 1610 and 1710, McBSP1 and McBSP3
223 * are DSP public peripherals.
224 */
225 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
226 omap_mcbsp_dsp_request();
227
228 spin_lock(&mcbsp[id].lock);
229 if (!mcbsp[id].free) {
230 printk (KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n", id + 1);
231 spin_unlock(&mcbsp[id].lock);
232 return -1;
233 }
234
235 mcbsp[id].free = 0;
236 spin_unlock(&mcbsp[id].lock);
237
238 /* We need to get IRQs here */
239 err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler, 0,
240 "McBSP",
241 (void *) (&mcbsp[id]));
242 if (err != 0) {
243 printk(KERN_ERR "OMAP-McBSP: Unable to request TX IRQ %d for McBSP%d\n",
244 mcbsp[id].tx_irq, mcbsp[id].id);
245 return err;
246 }
247
248 init_completion(&(mcbsp[id].tx_irq_completion));
249
250
251 err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler, 0,
252 "McBSP",
253 (void *) (&mcbsp[id]));
254 if (err != 0) {
255 printk(KERN_ERR "OMAP-McBSP: Unable to request RX IRQ %d for McBSP%d\n",
256 mcbsp[id].rx_irq, mcbsp[id].id);
257 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
258 return err;
259 }
260
261 init_completion(&(mcbsp[id].rx_irq_completion));
262 return 0;
263
264}
265
266void omap_mcbsp_free(unsigned int id)
267{
268 if (omap_mcbsp_check(id) < 0)
269 return;
270
271 if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
272 omap_mcbsp_dsp_free();
273
274 spin_lock(&mcbsp[id].lock);
275 if (mcbsp[id].free) {
276 printk (KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n", id + 1);
277 spin_unlock(&mcbsp[id].lock);
278 return;
279 }
280
281 mcbsp[id].free = 1;
282 spin_unlock(&mcbsp[id].lock);
283
284 /* Free IRQs */
285 free_irq(mcbsp[id].rx_irq, (void *) (&mcbsp[id]));
286 free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
287}
288
289/*
290 * Here we start the McBSP, by enabling the sample
291 * generator, both transmitter and receivers,
292 * and the frame sync.
293 */
294void omap_mcbsp_start(unsigned int id)
295{
296 u32 io_base;
297 u16 w;
298
299 if (omap_mcbsp_check(id) < 0)
300 return;
301
302 io_base = mcbsp[id].io_base;
303
304 mcbsp[id].rx_word_length = ((OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7);
305 mcbsp[id].tx_word_length = ((OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7);
306
307 /* Start the sample generator */
308 w = OMAP_MCBSP_READ(io_base, SPCR2);
309 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 6));
310
311 /* Enable transmitter and receiver */
312 w = OMAP_MCBSP_READ(io_base, SPCR2);
313 OMAP_MCBSP_WRITE(io_base, SPCR2, w | 1);
314
315 w = OMAP_MCBSP_READ(io_base, SPCR1);
316 OMAP_MCBSP_WRITE(io_base, SPCR1, w | 1);
317
318 udelay(100);
319
320 /* Start frame sync */
321 w = OMAP_MCBSP_READ(io_base, SPCR2);
322 OMAP_MCBSP_WRITE(io_base, SPCR2, w | (1 << 7));
323
324 /* Dump McBSP Regs */
325 omap_mcbsp_dump_reg(id);
326
327}
328
329void omap_mcbsp_stop(unsigned int id)
330{
331 u32 io_base;
332 u16 w;
333
334 if (omap_mcbsp_check(id) < 0)
335 return;
336
337 io_base = mcbsp[id].io_base;
338
339 /* Reset transmitter */
340 w = OMAP_MCBSP_READ(io_base, SPCR2);
341 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1));
342
343 /* Reset receiver */
344 w = OMAP_MCBSP_READ(io_base, SPCR1);
345 OMAP_MCBSP_WRITE(io_base, SPCR1, w & ~(1));
346
347 /* Reset the sample rate generator */
348 w = OMAP_MCBSP_READ(io_base, SPCR2);
349 OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6));
350}
351
352
353/*
354 * IRQ based word transmission.
355 */
356void omap_mcbsp_xmit_word(unsigned int id, u32 word)
357{
358 u32 io_base;
359 omap_mcbsp_word_length word_length = mcbsp[id].tx_word_length;
360
361 if (omap_mcbsp_check(id) < 0)
362 return;
363
364 io_base = mcbsp[id].io_base;
365
366 wait_for_completion(&(mcbsp[id].tx_irq_completion));
367
368 if (word_length > OMAP_MCBSP_WORD_16)
369 OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16);
370 OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff);
371}
372
373u32 omap_mcbsp_recv_word(unsigned int id)
374{
375 u32 io_base;
376 u16 word_lsb, word_msb = 0;
377 omap_mcbsp_word_length word_length = mcbsp[id].rx_word_length;
378
379 if (omap_mcbsp_check(id) < 0)
380 return -EINVAL;
381
382 io_base = mcbsp[id].io_base;
383
384 wait_for_completion(&(mcbsp[id].rx_irq_completion));
385
386 if (word_length > OMAP_MCBSP_WORD_16)
387 word_msb = OMAP_MCBSP_READ(io_base, DRR2);
388 word_lsb = OMAP_MCBSP_READ(io_base, DRR1);
389
390 return (word_lsb | (word_msb << 16));
391}
392
393
394/*
395 * Simple DMA based buffer rx/tx routines.
396 * Nothing fancy, just a single buffer tx/rx through DMA.
397 * The DMA resources are released once the transfer is done.
398 * For anything fancier, you should use your own customized DMA
399 * routines and callbacks.
400 */
401int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
402{
403 int dma_tx_ch;
404
405 if (omap_mcbsp_check(id) < 0)
406 return -EINVAL;
407
408 if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX", omap_mcbsp_tx_dma_callback,
409 &mcbsp[id],
410 &dma_tx_ch)) {
411 printk("OMAP-McBSP: Unable to request DMA channel for McBSP%d TX. Trying IRQ based TX\n", id+1);
412 return -EAGAIN;
413 }
414 mcbsp[id].dma_tx_lch = dma_tx_ch;
415
416 DBG("TX DMA on channel %d\n", dma_tx_ch);
417
418 init_completion(&(mcbsp[id].tx_dma_completion));
419
420 omap_set_dma_transfer_params(mcbsp[id].dma_tx_lch,
421 OMAP_DMA_DATA_TYPE_S16,
422 length >> 1, 1,
423 OMAP_DMA_SYNC_ELEMENT);
424
425 omap_set_dma_dest_params(mcbsp[id].dma_tx_lch,
426 OMAP_DMA_PORT_TIPB,
427 OMAP_DMA_AMODE_CONSTANT,
428 mcbsp[id].io_base + OMAP_MCBSP_REG_DXR1);
429
430 omap_set_dma_src_params(mcbsp[id].dma_tx_lch,
431 OMAP_DMA_PORT_EMIFF,
432 OMAP_DMA_AMODE_POST_INC,
433 buffer);
434
435 omap_start_dma(mcbsp[id].dma_tx_lch);
436 wait_for_completion(&(mcbsp[id].tx_dma_completion));
437 return 0;
438}
439
440
441int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
442{
443 int dma_rx_ch;
444
445 if (omap_mcbsp_check(id) < 0)
446 return -EINVAL;
447
448 if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX", omap_mcbsp_rx_dma_callback,
449 &mcbsp[id],
450 &dma_rx_ch)) {
451 printk("Unable to request DMA channel for McBSP%d RX. Trying IRQ based RX\n", id+1);
452 return -EAGAIN;
453 }
454 mcbsp[id].dma_rx_lch = dma_rx_ch;
455
456 DBG("RX DMA on channel %d\n", dma_rx_ch);
457
458 init_completion(&(mcbsp[id].rx_dma_completion));
459
460 omap_set_dma_transfer_params(mcbsp[id].dma_rx_lch,
461 OMAP_DMA_DATA_TYPE_S16,
462 length >> 1, 1,
463 OMAP_DMA_SYNC_ELEMENT);
464
465 omap_set_dma_src_params(mcbsp[id].dma_rx_lch,
466 OMAP_DMA_PORT_TIPB,
467 OMAP_DMA_AMODE_CONSTANT,
468 mcbsp[id].io_base + OMAP_MCBSP_REG_DRR1);
469
470 omap_set_dma_dest_params(mcbsp[id].dma_rx_lch,
471 OMAP_DMA_PORT_EMIFF,
472 OMAP_DMA_AMODE_POST_INC,
473 buffer);
474
475 omap_start_dma(mcbsp[id].dma_rx_lch);
476 wait_for_completion(&(mcbsp[id].rx_dma_completion));
477 return 0;
478}
479
480
481/*
482 * SPI wrapper.
483 * Since SPI setup is much simpler than the generic McBSP one,
484 * this wrapper just need an omap_mcbsp_spi_cfg structure as an input.
485 * Once this is done, you can call omap_mcbsp_start().
486 */
487void omap_mcbsp_set_spi_mode(unsigned int id, const struct omap_mcbsp_spi_cfg * spi_cfg)
488{
489 struct omap_mcbsp_reg_cfg mcbsp_cfg;
490
491 if (omap_mcbsp_check(id) < 0)
492 return;
493
494 memset(&mcbsp_cfg, 0, sizeof(struct omap_mcbsp_reg_cfg));
495
496 /* SPI has only one frame */
497 mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0));
498 mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0));
499
500 /* Clock stop mode */
501 if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY)
502 mcbsp_cfg.spcr1 |= (1 << 12);
503 else
504 mcbsp_cfg.spcr1 |= (3 << 11);
505
506 /* Set clock parities */
507 if (spi_cfg->rx_clock_polarity == OMAP_MCBSP_CLK_RISING)
508 mcbsp_cfg.pcr0 |= CLKRP;
509 else
510 mcbsp_cfg.pcr0 &= ~CLKRP;
511
512 if (spi_cfg->tx_clock_polarity == OMAP_MCBSP_CLK_RISING)
513 mcbsp_cfg.pcr0 &= ~CLKXP;
514 else
515 mcbsp_cfg.pcr0 |= CLKXP;
516
517 /* Set SCLKME to 0 and CLKSM to 1 */
518 mcbsp_cfg.pcr0 &= ~SCLKME;
519 mcbsp_cfg.srgr2 |= CLKSM;
520
521 /* Set FSXP */
522 if (spi_cfg->fsx_polarity == OMAP_MCBSP_FS_ACTIVE_HIGH)
523 mcbsp_cfg.pcr0 &= ~FSXP;
524 else
525 mcbsp_cfg.pcr0 |= FSXP;
526
527 if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) {
528 mcbsp_cfg.pcr0 |= CLKXM;
529 mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div -1);
530 mcbsp_cfg.pcr0 |= FSXM;
531 mcbsp_cfg.srgr2 &= ~FSGM;
532 mcbsp_cfg.xcr2 |= XDATDLY(1);
533 mcbsp_cfg.rcr2 |= RDATDLY(1);
534 }
535 else {
536 mcbsp_cfg.pcr0 &= ~CLKXM;
537 mcbsp_cfg.srgr1 |= CLKGDV(1);
538 mcbsp_cfg.pcr0 &= ~FSXM;
539 mcbsp_cfg.xcr2 &= ~XDATDLY(3);
540 mcbsp_cfg.rcr2 &= ~RDATDLY(3);
541 }
542
543 mcbsp_cfg.xcr2 &= ~XPHASE;
544 mcbsp_cfg.rcr2 &= ~RPHASE;
545
546 omap_mcbsp_config(id, &mcbsp_cfg);
547}
548
549
550/*
551 * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
552 * 730 has only 2 McBSP, and both of them are MPU peripherals.
553 */
554struct omap_mcbsp_info {
555 u32 virt_base;
556 u8 dma_rx_sync, dma_tx_sync;
557 u16 rx_irq, tx_irq;
558};
559
560#ifdef CONFIG_ARCH_OMAP730
561static const struct omap_mcbsp_info mcbsp_730[] = {
562 [0] = { .virt_base = io_p2v(OMAP730_MCBSP1_BASE),
563 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
564 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
565 .rx_irq = INT_730_McBSP1RX,
566 .tx_irq = INT_730_McBSP1TX },
567 [1] = { .virt_base = io_p2v(OMAP730_MCBSP2_BASE),
568 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
569 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
570 .rx_irq = INT_730_McBSP2RX,
571 .tx_irq = INT_730_McBSP2TX },
572};
573#endif
574
575#ifdef CONFIG_ARCH_OMAP1510
576static const struct omap_mcbsp_info mcbsp_1510[] = {
577 [0] = { .virt_base = OMAP1510_MCBSP1_BASE,
578 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
579 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
580 .rx_irq = INT_McBSP1RX,
581 .tx_irq = INT_McBSP1TX },
582 [1] = { .virt_base = io_p2v(OMAP1510_MCBSP2_BASE),
583 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
584 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
585 .rx_irq = INT_1510_SPI_RX,
586 .tx_irq = INT_1510_SPI_TX },
587 [2] = { .virt_base = OMAP1510_MCBSP3_BASE,
588 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
589 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
590 .rx_irq = INT_McBSP3RX,
591 .tx_irq = INT_McBSP3TX },
592};
593#endif
594
595#if defined(CONFIG_ARCH_OMAP16XX)
596static const struct omap_mcbsp_info mcbsp_1610[] = {
597 [0] = { .virt_base = OMAP1610_MCBSP1_BASE,
598 .dma_rx_sync = OMAP_DMA_MCBSP1_RX,
599 .dma_tx_sync = OMAP_DMA_MCBSP1_TX,
600 .rx_irq = INT_McBSP1RX,
601 .tx_irq = INT_McBSP1TX },
602 [1] = { .virt_base = io_p2v(OMAP1610_MCBSP2_BASE),
603 .dma_rx_sync = OMAP_DMA_MCBSP2_RX,
604 .dma_tx_sync = OMAP_DMA_MCBSP2_TX,
605 .rx_irq = INT_1610_McBSP2_RX,
606 .tx_irq = INT_1610_McBSP2_TX },
607 [2] = { .virt_base = OMAP1610_MCBSP3_BASE,
608 .dma_rx_sync = OMAP_DMA_MCBSP3_RX,
609 .dma_tx_sync = OMAP_DMA_MCBSP3_TX,
610 .rx_irq = INT_McBSP3RX,
611 .tx_irq = INT_McBSP3TX },
612};
613#endif
614
615static int __init omap_mcbsp_init(void)
616{
617 int mcbsp_count = 0, i;
618 static const struct omap_mcbsp_info *mcbsp_info;
619
620 printk("Initializing OMAP McBSP system\n");
621
622 mcbsp_dsp_ck = clk_get(0, "dsp_ck");
623 if (IS_ERR(mcbsp_dsp_ck)) {
624 printk(KERN_ERR "mcbsp: could not acquire dsp_ck handle.\n");
625 return PTR_ERR(mcbsp_dsp_ck);
626 }
627 mcbsp_api_ck = clk_get(0, "api_ck");
628 if (IS_ERR(mcbsp_dsp_ck)) {
629 printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
630 return PTR_ERR(mcbsp_api_ck);
631 }
632
633#ifdef CONFIG_ARCH_OMAP730
634 if (cpu_is_omap730()) {
635 mcbsp_info = mcbsp_730;
636 mcbsp_count = ARRAY_SIZE(mcbsp_730);
637 }
638#endif
639#ifdef CONFIG_ARCH_OMAP1510
640 if (cpu_is_omap1510()) {
641 mcbsp_info = mcbsp_1510;
642 mcbsp_count = ARRAY_SIZE(mcbsp_1510);
643 }
644#endif
645#if defined(CONFIG_ARCH_OMAP16XX)
646 if (cpu_is_omap1610() || cpu_is_omap1710()) {
647 mcbsp_info = mcbsp_1610;
648 mcbsp_count = ARRAY_SIZE(mcbsp_1610);
649 }
650#endif
651 for (i = 0; i < OMAP_MAX_MCBSP_COUNT ; i++) {
652 if (i >= mcbsp_count) {
653 mcbsp[i].io_base = 0;
654 mcbsp[i].free = 0;
655 continue;
656 }
657 mcbsp[i].id = i + 1;
658 mcbsp[i].free = 1;
659 mcbsp[i].dma_tx_lch = -1;
660 mcbsp[i].dma_rx_lch = -1;
661
662 mcbsp[i].io_base = mcbsp_info[i].virt_base;
663 mcbsp[i].tx_irq = mcbsp_info[i].tx_irq;
664 mcbsp[i].rx_irq = mcbsp_info[i].rx_irq;
665 mcbsp[i].dma_rx_sync = mcbsp_info[i].dma_rx_sync;
666 mcbsp[i].dma_tx_sync = mcbsp_info[i].dma_tx_sync;
667 spin_lock_init(&mcbsp[i].lock);
668 }
669
670 return 0;
671}
672
673
674arch_initcall(omap_mcbsp_init);
675
676EXPORT_SYMBOL(omap_mcbsp_config);
677EXPORT_SYMBOL(omap_mcbsp_request);
678EXPORT_SYMBOL(omap_mcbsp_free);
679EXPORT_SYMBOL(omap_mcbsp_start);
680EXPORT_SYMBOL(omap_mcbsp_stop);
681EXPORT_SYMBOL(omap_mcbsp_xmit_word);
682EXPORT_SYMBOL(omap_mcbsp_recv_word);
683EXPORT_SYMBOL(omap_mcbsp_xmit_buffer);
684EXPORT_SYMBOL(omap_mcbsp_recv_buffer);
685EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 20:04:30 -0500