summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap1/mcbsp.c
blob: 91f9abbd3250bf981faa1e583de43d4d1f9c3490 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/*
 * linux/arch/arm/mach-omap1/mcbsp.c
 *
 * Copyright (C) 2008 Instituto Nokia de Tecnologia
 * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Multichannel mode not supported.
 */
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <mach/irqs.h>
#include <plat/dma.h>
#include <plat/mux.h>
#include <plat/cpu.h>
#include <plat/mcbsp.h>

#define DPS_RSTCT2_PER_EN	(1 << 0)
#define DSP_RSTCT2_WD_PER_EN	(1 << 1)

static int dsp_use;
static struct clk *api_clk;
static struct clk *dsp_clk;
static struct platform_device **omap_mcbsp_devices;

static void omap1_mcbsp_request(unsigned int id)
{
	/*
	 * On 1510, 1610 and 1710, McBSP1 and McBSP3
	 * are DSP public peripherals.
	 */
	if (id == 0 || id == 2) {
		if (dsp_use++ == 0) {
			api_clk = clk_get(NULL, "api_ck");
			dsp_clk = clk_get(NULL, "dsp_ck");
			if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
				clk_enable(api_clk);
				clk_enable(dsp_clk);

				/*
				 * DSP external peripheral reset
				 * FIXME: This should be moved to dsp code
				 */
				__raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
						DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
			}
		}
	}
}

static void omap1_mcbsp_free(unsigned int id)
{
	if (id == 0 || id == 2) {
		if (--dsp_use == 0) {
			if (!IS_ERR(api_clk)) {
				clk_disable(api_clk);
				clk_put(api_clk);
			}
			if (!IS_ERR(dsp_clk)) {
				clk_disable(dsp_clk);
				clk_put(dsp_clk);
			}
		}
	}
}

static struct omap_mcbsp_ops omap1_mcbsp_ops = {
	.request	= omap1_mcbsp_request,
	.free		= omap1_mcbsp_free,
};

#define OMAP7XX_MCBSP1_BASE	0xfffb1000
#define OMAP7XX_MCBSP2_BASE	0xfffb1800

#define OMAP1510_MCBSP1_BASE	0xe1011800
#define OMAP1510_MCBSP2_BASE	0xfffb1000
#define OMAP1510_MCBSP3_BASE	0xe1017000

#define OMAP1610_MCBSP1_BASE	0xe1011800
#define OMAP1610_MCBSP2_BASE	0xfffb1000
#define OMAP1610_MCBSP3_BASE	0xe1017000

#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
struct resource omap7xx_mcbsp_res[][6] = {
	{
		{
			.start = OMAP7XX_MCBSP1_BASE,
			.end   = OMAP7XX_MCBSP1_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_7XX_McBSP1RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_7XX_McBSP1TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP1_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP1_TX,
			.flags = IORESOURCE_DMA,
		},
	},
	{
		{
			.start = OMAP7XX_MCBSP2_BASE,
			.end   = OMAP7XX_MCBSP2_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_7XX_McBSP2RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_7XX_McBSP2TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP3_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP3_TX,
			.flags = IORESOURCE_DMA,
		},
	},
};

#define omap7xx_mcbsp_res_0		omap7xx_mcbsp_res[0]

static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
	{
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP7XX_MCBSP_RES_SZ		ARRAY_SIZE(omap7xx_mcbsp_res[1])
#define OMAP7XX_MCBSP_COUNT		ARRAY_SIZE(omap7xx_mcbsp_res)
#else
#define omap7xx_mcbsp_res_0		NULL
#define omap7xx_mcbsp_pdata		NULL
#define OMAP7XX_MCBSP_RES_SZ		0
#define OMAP7XX_MCBSP_COUNT		0
#endif

#ifdef CONFIG_ARCH_OMAP15XX
struct resource omap15xx_mcbsp_res[][6] = {
	{
		{
			.start = OMAP1510_MCBSP1_BASE,
			.end   = OMAP1510_MCBSP1_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_McBSP1RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_McBSP1TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP1_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP1_TX,
			.flags = IORESOURCE_DMA,
		},
	},
	{
		{
			.start = OMAP1510_MCBSP2_BASE,
			.end   = OMAP1510_MCBSP2_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_1510_SPI_RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_1510_SPI_TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP2_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP2_TX,
			.flags = IORESOURCE_DMA,
		},
	},
	{
		{
			.start = OMAP1510_MCBSP3_BASE,
			.end   = OMAP1510_MCBSP3_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_McBSP3RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_McBSP3TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP3_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP3_TX,
			.flags = IORESOURCE_DMA,
		},
	},
};

#define omap15xx_mcbsp_res_0		omap15xx_mcbsp_res[0]

static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
	{
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP15XX_MCBSP_RES_SZ		ARRAY_SIZE(omap15xx_mcbsp_res[1])
#define OMAP15XX_MCBSP_COUNT		ARRAY_SIZE(omap15xx_mcbsp_res)
#else
#define omap15xx_mcbsp_res_0		NULL
#define omap15xx_mcbsp_pdata		NULL
#define OMAP15XX_MCBSP_RES_SZ		0
#define OMAP15XX_MCBSP_COUNT		0
#endif

#ifdef CONFIG_ARCH_OMAP16XX
struct resource omap16xx_mcbsp_res[][6] = {
	{
		{
			.start = OMAP1610_MCBSP1_BASE,
			.end   = OMAP1610_MCBSP1_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_McBSP1RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_McBSP1TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP1_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP1_TX,
			.flags = IORESOURCE_DMA,
		},
	},
	{
		{
			.start = OMAP1610_MCBSP2_BASE,
			.end   = OMAP1610_MCBSP2_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_1610_McBSP2_RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_1610_McBSP2_TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP2_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP2_TX,
			.flags = IORESOURCE_DMA,
		},
	},
	{
		{
			.start = OMAP1610_MCBSP3_BASE,
			.end   = OMAP1610_MCBSP3_BASE + SZ_256,
			.flags = IORESOURCE_MEM,
		},
		{
			.name  = "rx",
			.start = INT_McBSP3RX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "tx",
			.start = INT_McBSP3TX,
			.flags = IORESOURCE_IRQ,
		},
		{
			.name  = "rx",
			.start = OMAP_DMA_MCBSP3_RX,
			.flags = IORESOURCE_DMA,
		},
		{
			.name  = "tx",
			.start = OMAP_DMA_MCBSP3_TX,
			.flags = IORESOURCE_DMA,
		},
	},
};

#define omap16xx_mcbsp_res_0		omap16xx_mcbsp_res[0]

static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
	{
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP16XX_MCBSP_RES_SZ		ARRAY_SIZE(omap16xx_mcbsp_res[1])
#define OMAP16XX_MCBSP_COUNT		ARRAY_SIZE(omap16xx_mcbsp_res)
#else
#define omap16xx_mcbsp_res_0		NULL
#define omap16xx_mcbsp_pdata		NULL
#define OMAP16XX_MCBSP_RES_SZ		0
#define OMAP16XX_MCBSP_COUNT		0
#endif

static void omap_mcbsp_register_board_cfg(struct resource *res, int res_count,
			struct omap_mcbsp_platform_data *config, int size)
{
	int i;

	omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
				     GFP_KERNEL);
	if (!omap_mcbsp_devices) {
		printk(KERN_ERR "Could not register McBSP devices\n");
		return;
	}

	for (i = 0; i < size; i++) {
		struct platform_device *new_mcbsp;
		int ret;

		new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
		if (!new_mcbsp)
			continue;
		platform_device_add_resources(new_mcbsp, &res[i * res_count],
					res_count);
		config[i].reg_size = 2;
		config[i].reg_step = 2;
		new_mcbsp->dev.platform_data = &config[i];
		ret = platform_device_add(new_mcbsp);
		if (ret) {
			platform_device_put(new_mcbsp);
			continue;
		}
		omap_mcbsp_devices[i] = new_mcbsp;
	}
}

static int __init omap1_mcbsp_init(void)
{
	if (!cpu_class_is_omap1())
		return -ENODEV;

	if (cpu_is_omap7xx())
		omap_mcbsp_count = OMAP7XX_MCBSP_COUNT;
	else if (cpu_is_omap15xx())
		omap_mcbsp_count = OMAP15XX_MCBSP_COUNT;
	else if (cpu_is_omap16xx())
		omap_mcbsp_count = OMAP16XX_MCBSP_COUNT;

	mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
								GFP_KERNEL);
	if (!mcbsp_ptr)
		return -ENOMEM;

	if (cpu_is_omap7xx())
		omap_mcbsp_register_board_cfg(omap7xx_mcbsp_res_0,
					OMAP7XX_MCBSP_RES_SZ,
					omap7xx_mcbsp_pdata,
					OMAP7XX_MCBSP_COUNT);

	if (cpu_is_omap15xx())
		omap_mcbsp_register_board_cfg(omap15xx_mcbsp_res_0,
					OMAP15XX_MCBSP_RES_SZ,
					omap15xx_mcbsp_pdata,
					OMAP15XX_MCBSP_COUNT);

	if (cpu_is_omap16xx())
		omap_mcbsp_register_board_cfg(omap16xx_mcbsp_res_0,
					OMAP16XX_MCBSP_RES_SZ,
					omap16xx_mcbsp_pdata,
					OMAP16XX_MCBSP_COUNT);

	return omap_mcbsp_init();
}

arch_initcall(omap1_mcbsp_init);
OpenPOWER on IntegriCloud