xref: /openbmc/linux/arch/arm/mach-omap1/mcbsp.c (revision b04b4f78)
1 /*
2  * linux/arch/arm/mach-omap1/mcbsp.c
3  *
4  * Copyright (C) 2008 Instituto Nokia de Tecnologia
5  * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * Multichannel mode not supported.
12  */
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/clk.h>
16 #include <linux/err.h>
17 #include <linux/io.h>
18 #include <linux/platform_device.h>
19 
20 #include <mach/irqs.h>
21 #include <mach/dma.h>
22 #include <mach/irqs.h>
23 #include <mach/mux.h>
24 #include <mach/cpu.h>
25 #include <mach/mcbsp.h>
26 #include <mach/dsp_common.h>
27 
28 #define DPS_RSTCT2_PER_EN	(1 << 0)
29 #define DSP_RSTCT2_WD_PER_EN	(1 << 1)
30 
31 static int dsp_use;
32 static struct clk *api_clk;
33 static struct clk *dsp_clk;
34 
35 static void omap1_mcbsp_request(unsigned int id)
36 {
37 	/*
38 	 * On 1510, 1610 and 1710, McBSP1 and McBSP3
39 	 * are DSP public peripherals.
40 	 */
41 	if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
42 		if (dsp_use++ == 0) {
43 			api_clk = clk_get(NULL, "api_ck");
44 			dsp_clk = clk_get(NULL, "dsp_ck");
45 			if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
46 				clk_enable(api_clk);
47 				clk_enable(dsp_clk);
48 
49 				omap_dsp_request_mem();
50 				/*
51 				 * DSP external peripheral reset
52 				 * FIXME: This should be moved to dsp code
53 				 */
54 				__raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
55 						DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
56 			}
57 		}
58 	}
59 }
60 
61 static void omap1_mcbsp_free(unsigned int id)
62 {
63 	if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
64 		if (--dsp_use == 0) {
65 			omap_dsp_release_mem();
66 			if (!IS_ERR(api_clk)) {
67 				clk_disable(api_clk);
68 				clk_put(api_clk);
69 			}
70 			if (!IS_ERR(dsp_clk)) {
71 				clk_disable(dsp_clk);
72 				clk_put(dsp_clk);
73 			}
74 		}
75 	}
76 }
77 
78 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
79 	.request	= omap1_mcbsp_request,
80 	.free		= omap1_mcbsp_free,
81 };
82 
83 #ifdef CONFIG_ARCH_OMAP730
84 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
85 	{
86 		.phys_base	= OMAP730_MCBSP1_BASE,
87 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
88 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
89 		.rx_irq		= INT_730_McBSP1RX,
90 		.tx_irq		= INT_730_McBSP1TX,
91 		.ops		= &omap1_mcbsp_ops,
92 	},
93 	{
94 		.phys_base	= OMAP730_MCBSP2_BASE,
95 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
96 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
97 		.rx_irq		= INT_730_McBSP2RX,
98 		.tx_irq		= INT_730_McBSP2TX,
99 		.ops		= &omap1_mcbsp_ops,
100 	},
101 };
102 #define OMAP730_MCBSP_PDATA_SZ		ARRAY_SIZE(omap730_mcbsp_pdata)
103 #else
104 #define omap730_mcbsp_pdata		NULL
105 #define OMAP730_MCBSP_PDATA_SZ		0
106 #endif
107 
108 #ifdef CONFIG_ARCH_OMAP15XX
109 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
110 	{
111 		.phys_base	= OMAP1510_MCBSP1_BASE,
112 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
113 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
114 		.rx_irq		= INT_McBSP1RX,
115 		.tx_irq		= INT_McBSP1TX,
116 		.ops		= &omap1_mcbsp_ops,
117 	},
118 	{
119 		.phys_base	= OMAP1510_MCBSP2_BASE,
120 		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
121 		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
122 		.rx_irq		= INT_1510_SPI_RX,
123 		.tx_irq		= INT_1510_SPI_TX,
124 		.ops		= &omap1_mcbsp_ops,
125 	},
126 	{
127 		.phys_base	= OMAP1510_MCBSP3_BASE,
128 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
129 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
130 		.rx_irq		= INT_McBSP3RX,
131 		.tx_irq		= INT_McBSP3TX,
132 		.ops		= &omap1_mcbsp_ops,
133 	},
134 };
135 #define OMAP15XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap15xx_mcbsp_pdata)
136 #else
137 #define omap15xx_mcbsp_pdata		NULL
138 #define OMAP15XX_MCBSP_PDATA_SZ		0
139 #endif
140 
141 #ifdef CONFIG_ARCH_OMAP16XX
142 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
143 	{
144 		.phys_base	= OMAP1610_MCBSP1_BASE,
145 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
146 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
147 		.rx_irq		= INT_McBSP1RX,
148 		.tx_irq		= INT_McBSP1TX,
149 		.ops		= &omap1_mcbsp_ops,
150 	},
151 	{
152 		.phys_base	= OMAP1610_MCBSP2_BASE,
153 		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
154 		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
155 		.rx_irq		= INT_1610_McBSP2_RX,
156 		.tx_irq		= INT_1610_McBSP2_TX,
157 		.ops		= &omap1_mcbsp_ops,
158 	},
159 	{
160 		.phys_base	= OMAP1610_MCBSP3_BASE,
161 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
162 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
163 		.rx_irq		= INT_McBSP3RX,
164 		.tx_irq		= INT_McBSP3TX,
165 		.ops		= &omap1_mcbsp_ops,
166 	},
167 };
168 #define OMAP16XX_MCBSP_PDATA_SZ		ARRAY_SIZE(omap16xx_mcbsp_pdata)
169 #else
170 #define omap16xx_mcbsp_pdata		NULL
171 #define OMAP16XX_MCBSP_PDATA_SZ		0
172 #endif
173 
174 int __init omap1_mcbsp_init(void)
175 {
176 	if (cpu_is_omap730())
177 		omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ;
178 	if (cpu_is_omap15xx())
179 		omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
180 	if (cpu_is_omap16xx())
181 		omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
182 
183 	mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
184 								GFP_KERNEL);
185 	if (!mcbsp_ptr)
186 		return -ENOMEM;
187 
188 	if (cpu_is_omap730())
189 		omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
190 						OMAP730_MCBSP_PDATA_SZ);
191 
192 	if (cpu_is_omap15xx())
193 		omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
194 						OMAP15XX_MCBSP_PDATA_SZ);
195 
196 	if (cpu_is_omap16xx())
197 		omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
198 						OMAP16XX_MCBSP_PDATA_SZ);
199 
200 	return omap_mcbsp_init();
201 }
202 
203 arch_initcall(omap1_mcbsp_init);
204