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
|
/*
* linux/arch/arm/mach-omap2/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/dma.h>
#include <mach/mux.h>
#include <mach/cpu.h>
#include <mach/mcbsp.h>
struct mcbsp_internal_clk {
struct clk clk;
struct clk **childs;
int n_childs;
};
#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
{
const char *clk_names[] = { "mcbsp_ick", "mcbsp_fck" };
int i;
mclk->n_childs = ARRAY_SIZE(clk_names);
mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *),
GFP_KERNEL);
for (i = 0; i < mclk->n_childs; i++) {
/* We fake a platform device to get correct device id */
struct platform_device pdev;
pdev.dev.bus = &platform_bus_type;
pdev.id = mclk->clk.id;
mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]);
if (IS_ERR(mclk->childs[i]))
printk(KERN_ERR "Could not get clock %s (%d).\n",
clk_names[i], mclk->clk.id);
}
}
static int omap_mcbsp_clk_enable(struct clk *clk)
{
struct mcbsp_internal_clk *mclk = container_of(clk,
struct mcbsp_internal_clk, clk);
int i;
for (i = 0; i < mclk->n_childs; i++)
clk_enable(mclk->childs[i]);
return 0;
}
static void omap_mcbsp_clk_disable(struct clk *clk)
{
struct mcbsp_internal_clk *mclk = container_of(clk,
struct mcbsp_internal_clk, clk);
int i;
for (i = 0; i < mclk->n_childs; i++)
clk_disable(mclk->childs[i]);
}
static struct mcbsp_internal_clk omap_mcbsp_clks[] = {
{
.clk = {
.name = "mcbsp_clk",
.id = 1,
.enable = omap_mcbsp_clk_enable,
.disable = omap_mcbsp_clk_disable,
},
},
{
.clk = {
.name = "mcbsp_clk",
.id = 2,
.enable = omap_mcbsp_clk_enable,
.disable = omap_mcbsp_clk_disable,
},
},
};
#define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks)
#else
#define omap_mcbsp_clks_size 0
static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks;
static inline void omap_mcbsp_clk_init(struct clk *clk)
{ }
#endif
static void omap2_mcbsp2_mux_setup(void)
{
omap_cfg_reg(Y15_24XX_MCBSP2_CLKX);
omap_cfg_reg(R14_24XX_MCBSP2_FSX);
omap_cfg_reg(W15_24XX_MCBSP2_DR);
omap_cfg_reg(V15_24XX_MCBSP2_DX);
omap_cfg_reg(V14_24XX_GPIO117);
/*
* TODO: Need to add MUX settings for OMAP 2430 SDP
*/
}
static void omap2_mcbsp_request(unsigned int id)
{
if (cpu_is_omap2420() && (id == OMAP_MCBSP2))
omap2_mcbsp2_mux_setup();
}
static int omap2_mcbsp_check(unsigned int id)
{
if (id > OMAP_MAX_MCBSP_COUNT - 1) {
printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
return -ENODEV;
}
return 0;
}
static struct omap_mcbsp_ops omap2_mcbsp_ops = {
.request = omap2_mcbsp_request,
.check = omap2_mcbsp_check,
};
#ifdef CONFIG_ARCH_OMAP24XX
static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = {
{
.phys_base = OMAP24XX_MCBSP1_BASE,
.dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX,
.dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX,
.rx_irq = INT_24XX_MCBSP1_IRQ_RX,
.tx_irq = INT_24XX_MCBSP1_IRQ_TX,
.ops = &omap2_mcbsp_ops,
.clk_name = "mcbsp_clk",
},
{
.phys_base = OMAP24XX_MCBSP2_BASE,
.dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX,
.dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX,
.rx_irq = INT_24XX_MCBSP2_IRQ_RX,
.tx_irq = INT_24XX_MCBSP2_IRQ_TX,
.ops = &omap2_mcbsp_ops,
.clk_name = "mcbsp_clk",
},
};
#define OMAP24XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap24xx_mcbsp_pdata)
#else
#define omap24xx_mcbsp_pdata NULL
#define OMAP24XX_MCBSP_PDATA_SZ 0
#endif
#ifdef CONFIG_ARCH_OMAP34XX
static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
{
.phys_base = OMAP34XX_MCBSP1_BASE,
.dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX,
.dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX,
.rx_irq = INT_24XX_MCBSP1_IRQ_RX,
.tx_irq = INT_24XX_MCBSP1_IRQ_TX,
.ops = &omap2_mcbsp_ops,
.clk_name = "mcbsp_clk",
},
{
.phys_base = OMAP34XX_MCBSP2_BASE,
.dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX,
.dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX,
.rx_irq = INT_24XX_MCBSP2_IRQ_RX,
.tx_irq = INT_24XX_MCBSP2_IRQ_TX,
.ops = &omap2_mcbsp_ops,
.clk_name = "mcbsp_clk",
},
};
#define OMAP34XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap34xx_mcbsp_pdata)
#else
#define omap34xx_mcbsp_pdata NULL
#define OMAP34XX_MCBSP_PDATA_SZ 0
#endif
int __init omap2_mcbsp_init(void)
{
int i;
for (i = 0; i < omap_mcbsp_clks_size; i++) {
/* Once we call clk_get inside init, we do not register it */
omap_mcbsp_clk_init(&omap_mcbsp_clks[i]);
clk_register(&omap_mcbsp_clks[i].clk);
}
if (cpu_is_omap24xx())
omap_mcbsp_register_board_cfg(omap24xx_mcbsp_pdata,
OMAP24XX_MCBSP_PDATA_SZ);
if (cpu_is_omap34xx())
omap_mcbsp_register_board_cfg(omap34xx_mcbsp_pdata,
OMAP34XX_MCBSP_PDATA_SZ);
return omap_mcbsp_init();
}
arch_initcall(omap2_mcbsp_init);
|
