Merge tag 'sound-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
[linux-3.10.git] / arch / arm / mach-omap2 / mcbsp.c
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>
18 #include <linux/of.h>
19 #include <linux/platform_device.h>
20 #include <linux/slab.h>
21 #include <linux/platform_data/asoc-ti-mcbsp.h>
22
23 #include <plat/dma.h>
24 #include <plat/omap_device.h>
25 #include <linux/pm_runtime.h>
26
27 /*
28  * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
29  * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
30  */
31 #include "cm2xxx_3xxx.h"
32 #include "cm-regbits-34xx.h"
33
34 static int omap3_enable_st_clock(unsigned int id, bool enable)
35 {
36         unsigned int w;
37
38         /*
39          * Sidetone uses McBSP ICLK - which must not idle when sidetones
40          * are enabled or sidetones start sounding ugly.
41          */
42         w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
43         if (enable)
44                 w &= ~(1 << (id - 2));
45         else
46                 w |= 1 << (id - 2);
47         omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
48
49         return 0;
50 }
51
52 static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
53 {
54         int id, count = 1;
55         char *name = "omap-mcbsp";
56         struct omap_hwmod *oh_device[2];
57         struct omap_mcbsp_platform_data *pdata = NULL;
58         struct platform_device *pdev;
59
60         sscanf(oh->name, "mcbsp%d", &id);
61
62         pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
63         if (!pdata) {
64                 pr_err("%s: No memory for mcbsp\n", __func__);
65                 return -ENOMEM;
66         }
67
68         pdata->reg_step = 4;
69         if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
70                 pdata->reg_size = 2;
71         } else {
72                 pdata->reg_size = 4;
73                 pdata->has_ccr = true;
74         }
75
76         if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
77                 /* The FIFO has 128 locations */
78                 pdata->buffer_size = 0x80;
79         } else if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
80                 if (id == 2)
81                         /* The FIFO has 1024 + 256 locations */
82                         pdata->buffer_size = 0x500;
83                 else
84                         /* The FIFO has 128 locations */
85                         pdata->buffer_size = 0x80;
86         } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
87                 /* The FIFO has 128 locations for all instances */
88                 pdata->buffer_size = 0x80;
89         }
90
91         if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
92                 pdata->has_wakeup = true;
93
94         oh_device[0] = oh;
95
96         if (oh->dev_attr) {
97                 oh_device[1] = omap_hwmod_lookup((
98                 (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
99                 pdata->enable_st_clock = omap3_enable_st_clock;
100                 count++;
101         }
102         pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
103                                 sizeof(*pdata), NULL, 0, false);
104         kfree(pdata);
105         if (IS_ERR(pdev))  {
106                 pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
107                                         name, oh->name);
108                 return PTR_ERR(pdev);
109         }
110         return 0;
111 }
112
113 static int __init omap2_mcbsp_init(void)
114 {
115         if (!of_have_populated_dt())
116                 omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
117
118         return 0;
119 }
120 arch_initcall(omap2_mcbsp_init);