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
|
/*
* 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 <linux/slab.h>
#include <mach/irqs.h>
#include <plat/dma.h>
#include <plat/cpu.h>
#include <plat/mcbsp.h>
#include <plat/omap_device.h>
#include <linux/pm_runtime.h>
#include "control.h"
/* McBSP internal signal muxing functions */
void omap2_mcbsp1_mux_clkr_src(u8 mux)
{
u32 v;
v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
if (mux == CLKR_SRC_CLKR)
v &= ~OMAP2_MCBSP1_CLKR_MASK;
else if (mux == CLKR_SRC_CLKX)
v |= OMAP2_MCBSP1_CLKR_MASK;
omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
}
EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
void omap2_mcbsp1_mux_fsr_src(u8 mux)
{
u32 v;
v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
if (mux == FSR_SRC_FSR)
v &= ~OMAP2_MCBSP1_FSR_MASK;
else if (mux == FSR_SRC_FSX)
v |= OMAP2_MCBSP1_FSR_MASK;
omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
}
EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
/* McBSP CLKS source switching function */
int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
{
struct omap_mcbsp *mcbsp;
struct clk *fck_src;
char *fck_src_name;
int r;
if (!omap_mcbsp_check_valid_id(id)) {
pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
return -EINVAL;
}
mcbsp = id_to_mcbsp_ptr(id);
if (fck_src_id == MCBSP_CLKS_PAD_SRC)
fck_src_name = "pad_fck";
else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
fck_src_name = "prcm_fck";
else
return -EINVAL;
fck_src = clk_get(mcbsp->dev, fck_src_name);
if (IS_ERR_OR_NULL(fck_src)) {
pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
fck_src_name);
return -EINVAL;
}
pm_runtime_put_sync(mcbsp->dev);
r = clk_set_parent(mcbsp->fclk, fck_src);
if (IS_ERR_VALUE(r)) {
pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
"clks", fck_src_name);
clk_put(fck_src);
return -EINVAL;
}
pm_runtime_get_sync(mcbsp->dev);
clk_put(fck_src);
return 0;
}
EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
struct omap_device_pm_latency omap2_mcbsp_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
},
};
static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
{
int id, count = 1;
char *name = "omap-mcbsp";
struct omap_hwmod *oh_device[2];
struct omap_mcbsp_platform_data *pdata = NULL;
struct omap_device *od;
sscanf(oh->name, "mcbsp%d", &id);
pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
if (!pdata) {
pr_err("%s: No memory for mcbsp\n", __func__);
return -ENOMEM;
}
pdata->mcbsp_config_type = oh->class->rev;
if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
if (id == 2)
/* The FIFO has 1024 + 256 locations */
pdata->buffer_size = 0x500;
else
/* The FIFO has 128 locations */
pdata->buffer_size = 0x80;
}
oh_device[0] = oh;
if (oh->dev_attr) {
oh_device[1] = omap_hwmod_lookup((
(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
count++;
}
od = omap_device_build_ss(name, id, oh_device, count, pdata,
sizeof(*pdata), omap2_mcbsp_latency,
ARRAY_SIZE(omap2_mcbsp_latency), false);
kfree(pdata);
if (IS_ERR(od)) {
pr_err("%s: Cant build omap_device for %s:%s.\n", __func__,
name, oh->name);
return PTR_ERR(od);
}
omap_mcbsp_count++;
return 0;
}
static int __init omap2_mcbsp_init(void)
{
omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
GFP_KERNEL);
if (!mcbsp_ptr)
return -ENOMEM;
return omap_mcbsp_init();
}
arch_initcall(omap2_mcbsp_init);
|
