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44ec9a33 EV |
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 | ||
dd7667aa | 20 | #include <mach/irqs.h> |
a09e64fb RK |
21 | #include <mach/dma.h> |
22 | #include <mach/mux.h> | |
23 | #include <mach/cpu.h> | |
24 | #include <mach/mcbsp.h> | |
25 | #include <mach/dsp_common.h> | |
44ec9a33 EV |
26 | |
27 | #define DPS_RSTCT2_PER_EN (1 << 0) | |
28 | #define DSP_RSTCT2_WD_PER_EN (1 << 1) | |
29 | ||
b820ce4e RK |
30 | static int dsp_use; |
31 | static struct clk *api_clk; | |
32 | static struct clk *dsp_clk; | |
44ec9a33 | 33 | |
44ec9a33 EV |
34 | static void omap1_mcbsp_request(unsigned int id) |
35 | { | |
36 | /* | |
37 | * On 1510, 1610 and 1710, McBSP1 and McBSP3 | |
38 | * are DSP public peripherals. | |
39 | */ | |
40 | if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) { | |
b820ce4e | 41 | if (dsp_use++ == 0) { |
d53eb737 AK |
42 | api_clk = clk_get(NULL, "api_ck"); |
43 | dsp_clk = clk_get(NULL, "dsp_ck"); | |
b820ce4e RK |
44 | if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) { |
45 | clk_enable(api_clk); | |
46 | clk_enable(dsp_clk); | |
47 | ||
48 | omap_dsp_request_mem(); | |
49 | /* | |
50 | * DSP external peripheral reset | |
51 | * FIXME: This should be moved to dsp code | |
52 | */ | |
53 | __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN | | |
54 | DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2); | |
55 | } | |
56 | } | |
44ec9a33 EV |
57 | } |
58 | } | |
59 | ||
60 | static void omap1_mcbsp_free(unsigned int id) | |
61 | { | |
b820ce4e RK |
62 | if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) { |
63 | if (--dsp_use == 0) { | |
64 | omap_dsp_release_mem(); | |
65 | if (!IS_ERR(api_clk)) { | |
66 | clk_disable(api_clk); | |
67 | clk_put(api_clk); | |
68 | } | |
69 | if (!IS_ERR(dsp_clk)) { | |
70 | clk_disable(dsp_clk); | |
71 | clk_put(dsp_clk); | |
72 | } | |
73 | } | |
74 | } | |
44ec9a33 EV |
75 | } |
76 | ||
77 | static struct omap_mcbsp_ops omap1_mcbsp_ops = { | |
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78 | .request = omap1_mcbsp_request, |
79 | .free = omap1_mcbsp_free, | |
80 | }; | |
81 | ||
82 | #ifdef CONFIG_ARCH_OMAP730 | |
83 | static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = { | |
84 | { | |
65846909 | 85 | .phys_base = OMAP730_MCBSP1_BASE, |
44ec9a33 EV |
86 | .dma_rx_sync = OMAP_DMA_MCBSP1_RX, |
87 | .dma_tx_sync = OMAP_DMA_MCBSP1_TX, | |
88 | .rx_irq = INT_730_McBSP1RX, | |
89 | .tx_irq = INT_730_McBSP1TX, | |
90 | .ops = &omap1_mcbsp_ops, | |
91 | }, | |
92 | { | |
65846909 | 93 | .phys_base = OMAP730_MCBSP2_BASE, |
44ec9a33 EV |
94 | .dma_rx_sync = OMAP_DMA_MCBSP3_RX, |
95 | .dma_tx_sync = OMAP_DMA_MCBSP3_TX, | |
96 | .rx_irq = INT_730_McBSP2RX, | |
97 | .tx_irq = INT_730_McBSP2TX, | |
98 | .ops = &omap1_mcbsp_ops, | |
99 | }, | |
100 | }; | |
101 | #define OMAP730_MCBSP_PDATA_SZ ARRAY_SIZE(omap730_mcbsp_pdata) | |
102 | #else | |
103 | #define omap730_mcbsp_pdata NULL | |
104 | #define OMAP730_MCBSP_PDATA_SZ 0 | |
105 | #endif | |
106 | ||
107 | #ifdef CONFIG_ARCH_OMAP15XX | |
108 | static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = { | |
109 | { | |
65846909 | 110 | .phys_base = OMAP1510_MCBSP1_BASE, |
44ec9a33 EV |
111 | .dma_rx_sync = OMAP_DMA_MCBSP1_RX, |
112 | .dma_tx_sync = OMAP_DMA_MCBSP1_TX, | |
113 | .rx_irq = INT_McBSP1RX, | |
114 | .tx_irq = INT_McBSP1TX, | |
115 | .ops = &omap1_mcbsp_ops, | |
06151158 | 116 | }, |
44ec9a33 | 117 | { |
65846909 | 118 | .phys_base = OMAP1510_MCBSP2_BASE, |
44ec9a33 EV |
119 | .dma_rx_sync = OMAP_DMA_MCBSP2_RX, |
120 | .dma_tx_sync = OMAP_DMA_MCBSP2_TX, | |
121 | .rx_irq = INT_1510_SPI_RX, | |
122 | .tx_irq = INT_1510_SPI_TX, | |
123 | .ops = &omap1_mcbsp_ops, | |
124 | }, | |
125 | { | |
65846909 | 126 | .phys_base = OMAP1510_MCBSP3_BASE, |
44ec9a33 EV |
127 | .dma_rx_sync = OMAP_DMA_MCBSP3_RX, |
128 | .dma_tx_sync = OMAP_DMA_MCBSP3_TX, | |
129 | .rx_irq = INT_McBSP3RX, | |
130 | .tx_irq = INT_McBSP3TX, | |
131 | .ops = &omap1_mcbsp_ops, | |
44ec9a33 EV |
132 | }, |
133 | }; | |
134 | #define OMAP15XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap15xx_mcbsp_pdata) | |
135 | #else | |
136 | #define omap15xx_mcbsp_pdata NULL | |
137 | #define OMAP15XX_MCBSP_PDATA_SZ 0 | |
138 | #endif | |
139 | ||
140 | #ifdef CONFIG_ARCH_OMAP16XX | |
141 | static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = { | |
142 | { | |
65846909 | 143 | .phys_base = OMAP1610_MCBSP1_BASE, |
44ec9a33 EV |
144 | .dma_rx_sync = OMAP_DMA_MCBSP1_RX, |
145 | .dma_tx_sync = OMAP_DMA_MCBSP1_TX, | |
146 | .rx_irq = INT_McBSP1RX, | |
147 | .tx_irq = INT_McBSP1TX, | |
148 | .ops = &omap1_mcbsp_ops, | |
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149 | }, |
150 | { | |
65846909 | 151 | .phys_base = OMAP1610_MCBSP2_BASE, |
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152 | .dma_rx_sync = OMAP_DMA_MCBSP2_RX, |
153 | .dma_tx_sync = OMAP_DMA_MCBSP2_TX, | |
154 | .rx_irq = INT_1610_McBSP2_RX, | |
155 | .tx_irq = INT_1610_McBSP2_TX, | |
156 | .ops = &omap1_mcbsp_ops, | |
157 | }, | |
158 | { | |
65846909 | 159 | .phys_base = OMAP1610_MCBSP3_BASE, |
44ec9a33 EV |
160 | .dma_rx_sync = OMAP_DMA_MCBSP3_RX, |
161 | .dma_tx_sync = OMAP_DMA_MCBSP3_TX, | |
162 | .rx_irq = INT_McBSP3RX, | |
163 | .tx_irq = INT_McBSP3TX, | |
164 | .ops = &omap1_mcbsp_ops, | |
44ec9a33 EV |
165 | }, |
166 | }; | |
167 | #define OMAP16XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap16xx_mcbsp_pdata) | |
168 | #else | |
169 | #define omap16xx_mcbsp_pdata NULL | |
170 | #define OMAP16XX_MCBSP_PDATA_SZ 0 | |
171 | #endif | |
172 | ||
173 | int __init omap1_mcbsp_init(void) | |
174 | { | |
b4b58f58 CS |
175 | if (cpu_is_omap730()) |
176 | omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ; | |
177 | if (cpu_is_omap15xx()) | |
178 | omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ; | |
179 | if (cpu_is_omap16xx()) | |
180 | omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ; | |
181 | ||
182 | mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *), | |
183 | GFP_KERNEL); | |
184 | if (!mcbsp_ptr) | |
185 | return -ENOMEM; | |
186 | ||
44ec9a33 EV |
187 | if (cpu_is_omap730()) |
188 | omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata, | |
189 | OMAP730_MCBSP_PDATA_SZ); | |
190 | ||
191 | if (cpu_is_omap15xx()) | |
192 | omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata, | |
193 | OMAP15XX_MCBSP_PDATA_SZ); | |
194 | ||
195 | if (cpu_is_omap16xx()) | |
196 | omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata, | |
197 | OMAP16XX_MCBSP_PDATA_SZ); | |
198 | ||
199 | return omap_mcbsp_init(); | |
200 | } | |
201 | ||
202 | arch_initcall(omap1_mcbsp_init); |