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 <plat-omap/dma-omap.h>
26 #include "omap_device.h"
29 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
30 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
32 #include "cm2xxx_3xxx.h"
33 #include "cm-regbits-34xx.h"
35 static int omap3_enable_st_clock(unsigned int id, bool enable)
40 * Sidetone uses McBSP ICLK - which must not idle when sidetones
41 * are enabled or sidetones start sounding ugly.
43 w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
45 w &= ~(1 << (id - 2));
48 omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
53 static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
56 char *name = "omap-mcbsp";
57 struct omap_hwmod *oh_device[2];
58 struct omap_mcbsp_platform_data *pdata = NULL;
59 struct platform_device *pdev;
61 sscanf(oh->name, "mcbsp%d", &id);
63 pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
65 pr_err("%s: No memory for mcbsp\n", __func__);
70 if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
74 pdata->has_ccr = true;
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) {
82 /* The FIFO has 1024 + 256 locations */
83 pdata->buffer_size = 0x500;
85 /* The FIFO has 128 locations */
86 pdata->buffer_size = 0x80;
87 } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
88 /* The FIFO has 128 locations for all instances */
89 pdata->buffer_size = 0x80;
92 if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
93 pdata->has_wakeup = true;
98 oh_device[1] = omap_hwmod_lookup((
99 (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
100 pdata->enable_st_clock = omap3_enable_st_clock;
103 pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
104 sizeof(*pdata), NULL, 0, false);
107 pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
109 return PTR_ERR(pdev);
114 static int __init omap2_mcbsp_init(void)
116 if (!of_have_populated_dt())
117 omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
121 arch_initcall(omap2_mcbsp_init);