aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap1/mcbsp.c
blob: f9a5cf750b59cb7bfc88769d2c1135eb0bd1d79e (plain) (blame)
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
/*
 * 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/module.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>

#include <mach/irqs.h>
#include <plat/dma.h>
#include <plat/mux.h>
#include <plat/cpu.h>
#include <plat/mcbsp.h>
#include <plat/dsp_common.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 void omap1_mcbsp_request(unsigned int id)
{
	/*
	 * On 1510, 1610 and 1710, McBSP1 and McBSP3
	 * are DSP public peripherals.
	 */
	if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
		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);

				omap_dsp_request_mem();
				/*
				 * 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 == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
		if (--dsp_use == 0) {
			omap_dsp_release_mem();
			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,
};

#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
	{
		.phys_base	= OMAP7XX_MCBSP1_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
		.rx_irq		= INT_7XX_McBSP1RX,
		.tx_irq		= INT_7XX_McBSP1TX,
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.phys_base	= OMAP7XX_MCBSP2_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
		.rx_irq		= INT_7XX_McBSP2RX,
		.tx_irq		= INT_7XX_McBSP2TX,
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP7XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap7xx_mcbsp_pdata)
#define OMAP7XX_MCBSP_REG_NUM		(OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap7xx_mcbsp_pdata		NULL
#define OMAP7XX_MCBSP_PDATA_SZ		0
#define OMAP7XX_MCBSP_REG_NUM		0
#endif

#ifdef CONFIG_ARCH_OMAP15XX
static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
	{
		.phys_base	= OMAP1510_MCBSP1_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
		.rx_irq		= INT_McBSP1RX,
		.tx_irq		= INT_McBSP1TX,
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.phys_base	= OMAP1510_MCBSP2_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
		.rx_irq		= INT_1510_SPI_RX,
		.tx_irq		= INT_1510_SPI_TX,
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.phys_base	= OMAP1510_MCBSP3_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
		.rx_irq		= INT_McBSP3RX,
		.tx_irq		= INT_McBSP3TX,
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP15XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap15xx_mcbsp_pdata)
#define OMAP15XX_MCBSP_REG_NUM		(OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap15xx_mcbsp_pdata		NULL
#define OMAP15XX_MCBSP_PDATA_SZ		0
#define OMAP15XX_MCBSP_REG_NUM		0
#endif

#ifdef CONFIG_ARCH_OMAP16XX
static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
	{
		.phys_base	= OMAP1610_MCBSP1_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
		.rx_irq		= INT_McBSP1RX,
		.tx_irq		= INT_McBSP1TX,
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.phys_base	= OMAP1610_MCBSP2_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
		.rx_irq		= INT_1610_McBSP2_RX,
		.tx_irq		= INT_1610_McBSP2_TX,
		.ops		= &omap1_mcbsp_ops,
	},
	{
		.phys_base	= OMAP1610_MCBSP3_BASE,
		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
		.rx_irq		= INT_McBSP3RX,
		.tx_irq		= INT_McBSP3TX,
		.ops		= &omap1_mcbsp_ops,
	},
};
#define OMAP16XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap16xx_mcbsp_pdata)
#define OMAP16XX_MCBSP_REG_NUM		(OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap16xx_mcbsp_pdata		NULL
#define OMAP16XX_MCBSP_PDATA_SZ		0
#define OMAP16XX_MCBSP_REG_NUM		0
#endif

int __init omap1_mcbsp_init(void)
{
	if (cpu_is_omap7xx()) {
		omap_mcbsp_count = OMAP7XX_MCBSP_PDATA_SZ;
		omap_mcbsp_cache_size = OMAP7XX_MCBSP_REG_NUM * sizeof(u16);
	} else if (cpu_is_omap15xx()) {
		omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
		omap_mcbsp_cache_size = OMAP15XX_MCBSP_REG_NUM * sizeof(u16);
	} else if (cpu_is_omap16xx()) {
		omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
		omap_mcbsp_cache_size = OMAP16XX_MCBSP_REG_NUM * sizeof(u16);
	}

	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_pdata,
						OMAP7XX_MCBSP_PDATA_SZ);

	if (cpu_is_omap15xx())
		omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
						OMAP15XX_MCBSP_PDATA_SZ);

	if (cpu_is_omap16xx())
		omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
						OMAP16XX_MCBSP_PDATA_SZ);

	return omap_mcbsp_init();
}

arch_initcall(omap1_mcbsp_init);