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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 TL |
25 | |
26 | #include "omap_device.h" | |
4814ced5 | 27 | |
1743d14f JN |
28 | /* |
29 | * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle. | |
30 | * Sidetone needs non-gated ICLK and sidetone autoidle is broken. | |
31 | */ | |
d9a16f9a | 32 | #include "cm3xxx.h" |
1743d14f JN |
33 | #include "cm-regbits-34xx.h" |
34 | ||
1743d14f JN |
35 | static int omap3_enable_st_clock(unsigned int id, bool enable) |
36 | { | |
37 | unsigned int w; | |
38 | ||
39 | /* | |
40 | * Sidetone uses McBSP ICLK - which must not idle when sidetones | |
41 | * are enabled or sidetones start sounding ugly. | |
42 | */ | |
43 | w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE); | |
44 | if (enable) | |
45 | w &= ~(1 << (id - 2)); | |
46 | else | |
47 | w |= 1 << (id - 2); | |
48 | omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE); | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
9cf793f9 | 53 | static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused) |
64bcbd33 KVA |
54 | { |
55 | int id, count = 1; | |
56 | char *name = "omap-mcbsp"; | |
57 | struct omap_hwmod *oh_device[2]; | |
58 | struct omap_mcbsp_platform_data *pdata = NULL; | |
3528c58e | 59 | struct platform_device *pdev; |
3cf32bba | 60 | |
64bcbd33 | 61 | sscanf(oh->name, "mcbsp%d", &id); |
78673bc8 | 62 | |
64bcbd33 KVA |
63 | pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL); |
64 | if (!pdata) { | |
65 | pr_err("%s: No memory for mcbsp\n", __func__); | |
66 | return -ENOMEM; | |
67 | } | |
3cf32bba | 68 | |
cdc71514 | 69 | pdata->reg_step = 4; |
88408230 | 70 | if (oh->class->rev < MCBSP_CONFIG_TYPE2) { |
cdc71514 | 71 | pdata->reg_size = 2; |
88408230 | 72 | } else { |
cdc71514 | 73 | pdata->reg_size = 4; |
88408230 JN |
74 | pdata->has_ccr = true; |
75 | } | |
9504ba64 | 76 | |
cafebc4a PU |
77 | if (oh->class->rev == MCBSP_CONFIG_TYPE2) { |
78 | /* The FIFO has 128 locations */ | |
79 | pdata->buffer_size = 0x80; | |
80 | } else if (oh->class->rev == MCBSP_CONFIG_TYPE3) { | |
64bcbd33 KVA |
81 | if (id == 2) |
82 | /* The FIFO has 1024 + 256 locations */ | |
83 | pdata->buffer_size = 0x500; | |
84 | else | |
85 | /* The FIFO has 128 locations */ | |
86 | pdata->buffer_size = 0x80; | |
da76250e PU |
87 | } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) { |
88 | /* The FIFO has 128 locations for all instances */ | |
89 | pdata->buffer_size = 0x80; | |
64bcbd33 | 90 | } |
3cf32bba | 91 | |
1a645884 JN |
92 | if (oh->class->rev >= MCBSP_CONFIG_TYPE3) |
93 | pdata->has_wakeup = true; | |
94 | ||
64bcbd33 | 95 | oh_device[0] = oh; |
78673bc8 | 96 | |
64bcbd33 KVA |
97 | if (oh->dev_attr) { |
98 | oh_device[1] = omap_hwmod_lookup(( | |
99 | (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); | |
1743d14f | 100 | pdata->enable_st_clock = omap3_enable_st_clock; |
64bcbd33 KVA |
101 | count++; |
102 | } | |
3528c58e | 103 | pdev = omap_device_build_ss(name, id, oh_device, count, pdata, |
f718e2c0 | 104 | sizeof(*pdata), NULL, 0, false); |
64bcbd33 | 105 | kfree(pdata); |
3528c58e | 106 | if (IS_ERR(pdev)) { |
25985edc | 107 | pr_err("%s: Can't build omap_device for %s:%s.\n", __func__, |
64bcbd33 | 108 | name, oh->name); |
3528c58e | 109 | return PTR_ERR(pdev); |
64bcbd33 | 110 | } |
64bcbd33 KVA |
111 | return 0; |
112 | } | |
a5b92cc3 | 113 | |
b4b58f58 | 114 | static int __init omap2_mcbsp_init(void) |
78673bc8 | 115 | { |
e586e955 PU |
116 | if (!of_have_populated_dt()) |
117 | omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL); | |
b4b58f58 | 118 | |
0210dc4e | 119 | return 0; |
78673bc8 EV |
120 | } |
121 | arch_initcall(omap2_mcbsp_init); |