2 * linux/arch/arm/mach-omap2/mcbsp.c
4 * Copyright (C) 2008 Instituto Nokia de Tecnologia
5 * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
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.
11 * Multichannel mode not supported.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/clk.h>
16 #include <linux/err.h>
19 #include <linux/platform_device.h>
20 #include <linux/slab.h>
21 #include <linux/platform_data/asoc-ti-mcbsp.h>
22 #include <linux/pm_runtime.h>
24 #include <linux/omap-dma.h>
27 #include "omap_device.h"
31 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
32 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
35 #include "cm-regbits-34xx.h"
37 static struct clk
*mcbsp_iclks
[5];
39 static int omap3_enable_st_clock(unsigned int id
, bool enable
)
42 * Sidetone uses McBSP ICLK - which must not idle when sidetones
43 * are enabled or sidetones start sounding ugly.
46 return omap2_clk_deny_idle(mcbsp_iclks
[id
]);
48 return omap2_clk_allow_idle(mcbsp_iclks
[id
]);
51 static int __init
omap_init_mcbsp(struct omap_hwmod
*oh
, void *unused
)
54 char *name
= "omap-mcbsp";
55 struct omap_hwmod
*oh_device
[2];
56 struct omap_mcbsp_platform_data
*pdata
= NULL
;
57 struct platform_device
*pdev
;
60 sscanf(oh
->name
, "mcbsp%d", &id
);
62 pdata
= kzalloc(sizeof(struct omap_mcbsp_platform_data
), GFP_KERNEL
);
64 pr_err("%s: No memory for mcbsp\n", __func__
);
69 if (oh
->class->rev
< MCBSP_CONFIG_TYPE2
) {
73 pdata
->has_ccr
= true;
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
) {
81 /* The FIFO has 1024 + 256 locations */
82 pdata
->buffer_size
= 0x500;
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;
91 if (oh
->class->rev
>= MCBSP_CONFIG_TYPE3
)
92 pdata
->has_wakeup
= true;
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 sprintf(clk_name
, "mcbsp%d_ick", id
);
101 mcbsp_iclks
[id
] = clk_get(NULL
, clk_name
);
104 pdev
= omap_device_build_ss(name
, id
, oh_device
, count
, pdata
,
108 pr_err("%s: Can't build omap_device for %s:%s.\n", __func__
,
110 return PTR_ERR(pdev
);
115 static int __init
omap2_mcbsp_init(void)
117 if (!of_have_populated_dt())
118 omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp
, NULL
);
122 omap_arch_initcall(omap2_mcbsp_init
);
This page took 0.035382 seconds and 6 git commands to generate.