Commit | Line | Data |
---|---|---|
78673bc8 EV |
1 | /* |
2 | * linux/arch/arm/mach-omap2/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> | |
e586e955 | 18 | #include <linux/of.h> |
78673bc8 | 19 | #include <linux/platform_device.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
2203747c | 21 | #include <linux/platform_data/asoc-ti-mcbsp.h> |
25c7d49e | 22 | #include <linux/pm_runtime.h> |
78673bc8 | 23 | |
45c3eb7d | 24 | #include <linux/omap-dma.h> |
25c7d49e | 25 | |
b76c8b19 | 26 | #include "soc.h" |
25c7d49e | 27 | #include "omap_device.h" |
7a90da2a | 28 | #include "clock.h" |
4814ced5 | 29 | |
1743d14f JN |
30 | /* |
31 | * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle. | |
32 | * Sidetone needs non-gated ICLK and sidetone autoidle is broken. | |
33 | */ | |
d9a16f9a | 34 | #include "cm3xxx.h" |
1743d14f JN |
35 | #include "cm-regbits-34xx.h" |
36 | ||
7a90da2a TK |
37 | static struct clk *mcbsp_iclks[5]; |
38 | ||
1743d14f JN |
39 | static int omap3_enable_st_clock(unsigned int id, bool enable) |
40 | { | |
1743d14f JN |
41 | /* |
42 | * Sidetone uses McBSP ICLK - which must not idle when sidetones | |
43 | * are enabled or sidetones start sounding ugly. | |
44 | */ | |
1743d14f | 45 | if (enable) |
7a90da2a | 46 | return omap2_clk_deny_idle(mcbsp_iclks[id]); |
1743d14f | 47 | else |
7a90da2a | 48 | return omap2_clk_allow_idle(mcbsp_iclks[id]); |
1743d14f JN |
49 | } |
50 | ||
53ae95f6 PU |
51 | static int omap3_mcbsp_force_ick_on(struct clk *clk, bool force_on) |
52 | { | |
53 | if (!clk) | |
54 | return 0; | |
55 | ||
56 | if (force_on) | |
57 | return omap2_clk_deny_idle(clk); | |
58 | else | |
59 | return omap2_clk_allow_idle(clk); | |
60 | } | |
61 | ||
9cf793f9 | 62 | static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused) |
64bcbd33 KVA |
63 | { |
64 | int id, count = 1; | |
65 | char *name = "omap-mcbsp"; | |
66 | struct omap_hwmod *oh_device[2]; | |
67 | struct omap_mcbsp_platform_data *pdata = NULL; | |
3528c58e | 68 | struct platform_device *pdev; |
7a90da2a | 69 | char clk_name[11]; |
3cf32bba | 70 | |
64bcbd33 | 71 | sscanf(oh->name, "mcbsp%d", &id); |
78673bc8 | 72 | |
64bcbd33 KVA |
73 | pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL); |
74 | if (!pdata) { | |
75 | pr_err("%s: No memory for mcbsp\n", __func__); | |
76 | return -ENOMEM; | |
77 | } | |
3cf32bba | 78 | |
cdc71514 | 79 | pdata->reg_step = 4; |
88408230 | 80 | if (oh->class->rev < MCBSP_CONFIG_TYPE2) { |
cdc71514 | 81 | pdata->reg_size = 2; |
88408230 | 82 | } else { |
cdc71514 | 83 | pdata->reg_size = 4; |
88408230 JN |
84 | pdata->has_ccr = true; |
85 | } | |
9504ba64 | 86 | |
cafebc4a PU |
87 | if (oh->class->rev == MCBSP_CONFIG_TYPE2) { |
88 | /* The FIFO has 128 locations */ | |
89 | pdata->buffer_size = 0x80; | |
90 | } else if (oh->class->rev == MCBSP_CONFIG_TYPE3) { | |
64bcbd33 KVA |
91 | if (id == 2) |
92 | /* The FIFO has 1024 + 256 locations */ | |
93 | pdata->buffer_size = 0x500; | |
94 | else | |
95 | /* The FIFO has 128 locations */ | |
96 | pdata->buffer_size = 0x80; | |
da76250e PU |
97 | } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) { |
98 | /* The FIFO has 128 locations for all instances */ | |
99 | pdata->buffer_size = 0x80; | |
64bcbd33 | 100 | } |
3cf32bba | 101 | |
1a645884 JN |
102 | if (oh->class->rev >= MCBSP_CONFIG_TYPE3) |
103 | pdata->has_wakeup = true; | |
104 | ||
64bcbd33 | 105 | oh_device[0] = oh; |
78673bc8 | 106 | |
64bcbd33 KVA |
107 | if (oh->dev_attr) { |
108 | oh_device[1] = omap_hwmod_lookup(( | |
109 | (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); | |
1743d14f | 110 | pdata->enable_st_clock = omap3_enable_st_clock; |
53ae95f6 | 111 | pdata->force_ick_on = omap3_mcbsp_force_ick_on; |
7a90da2a TK |
112 | sprintf(clk_name, "mcbsp%d_ick", id); |
113 | mcbsp_iclks[id] = clk_get(NULL, clk_name); | |
64bcbd33 KVA |
114 | count++; |
115 | } | |
3528c58e | 116 | pdev = omap_device_build_ss(name, id, oh_device, count, pdata, |
c1d1cd59 | 117 | sizeof(*pdata)); |
64bcbd33 | 118 | kfree(pdata); |
3528c58e | 119 | if (IS_ERR(pdev)) { |
25985edc | 120 | pr_err("%s: Can't build omap_device for %s:%s.\n", __func__, |
64bcbd33 | 121 | name, oh->name); |
3528c58e | 122 | return PTR_ERR(pdev); |
64bcbd33 | 123 | } |
64bcbd33 KVA |
124 | return 0; |
125 | } | |
a5b92cc3 | 126 | |
b4b58f58 | 127 | static int __init omap2_mcbsp_init(void) |
78673bc8 | 128 | { |
e586e955 PU |
129 | if (!of_have_populated_dt()) |
130 | omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL); | |
b4b58f58 | 131 | |
0210dc4e | 132 | return 0; |
78673bc8 | 133 | } |
b76c8b19 | 134 | omap_arch_initcall(omap2_mcbsp_init); |