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
|
/*
* 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/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
#include <linux/pm_runtime.h>
#include <linux/omap-dma.h>
#include "soc.h"
#include "omap_device.h"
#include "clock.h"
/*
* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
* Sidetone needs non-gated ICLK and sidetone autoidle is broken.
*/
#include "cm3xxx.h"
#include "cm-regbits-34xx.h"
static struct clk *mcbsp_iclks[5];
static int omap3_enable_st_clock(unsigned int id, bool enable)
{
/*
* Sidetone uses McBSP ICLK - which must not idle when sidetones
* are enabled or sidetones start sounding ugly.
*/
if (enable)
return omap2_clk_deny_idle(mcbsp_iclks[id]);
else
return omap2_clk_allow_idle(mcbsp_iclks[id]);
}
static int omap3_mcbsp_force_ick_on(struct clk *clk, bool force_on)
{
if (!clk)
return 0;
if (force_on)
return omap2_clk_deny_idle(clk);
else
return omap2_clk_allow_idle(clk);
}
void __init omap3_mcbsp_init_pdata_callback(
struct omap_mcbsp_platform_data *pdata)
{
if (!pdata)
return;
pdata->force_ick_on = omap3_mcbsp_force_ick_on;
}
static int __init 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 platform_device *pdev;
char clk_name[11];
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->reg_step = 4;
if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
pdata->reg_size = 2;
} else {
pdata->reg_size = 4;
pdata->has_ccr = true;
}
if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
/* The FIFO has 128 locations */
pdata->buffer_size = 0x80;
} else 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;
} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
/* The FIFO has 128 locations for all instances */
pdata->buffer_size = 0x80;
}
if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
pdata->has_wakeup = true;
oh_device[0] = oh;
if (oh->dev_attr) {
oh_device[1] = omap_hwmod_lookup((
(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
pdata->enable_st_clock = omap3_enable_st_clock;
pdata->force_ick_on = omap3_mcbsp_force_ick_on;
sprintf(clk_name, "mcbsp%d_ick", id);
mcbsp_iclks[id] = clk_get(NULL, clk_name);
count++;
}
pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
sizeof(*pdata));
kfree(pdata);
if (IS_ERR(pdev)) {
pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
name, oh->name);
return PTR_ERR(pdev);
}
return 0;
}
static int __init omap2_mcbsp_init(void)
{
if (!of_have_populated_dt())
omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
return 0;
}
omap_arch_initcall(omap2_mcbsp_init);
|
