[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mach-omap2 / mcbsp.c

/*
 * linux/arch/arm/mach-omap2/mcbsp.c
 *
 * Copyright (C) 2008 Instituto Nokia de Tecnologia
 * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Multichannel mode not supported.
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
#include <linux/pm_runtime.h>

#include <linux/omap-dma.h>

#include "soc.h"
#include "omap_device.h"

/*
 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
 */
#include "cm3xxx.h"
#include "cm-regbits-34xx.h"

static int omap3_enable_st_clock(unsigned int id, bool enable)
{
	unsigned int w;

	/*
	 * Sidetone uses McBSP ICLK - which must not idle when sidetones
	 * are enabled or sidetones start sounding ugly.
	 */
	w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
	if (enable)
		w &= ~(1 << (id - 2));
	else
		w |= 1 << (id - 2);
	omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);

	return 0;
}

static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
{
	int id, count = 1;
	char *name = "omap-mcbsp";
	struct omap_hwmod *oh_device[2];
	struct omap_mcbsp_platform_data *pdata = NULL;
	struct platform_device *pdev;

	sscanf(oh->name, "mcbsp%d", &id);

	pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
	if (!pdata) {
		pr_err("%s: No memory for mcbsp\n", __func__);
		return -ENOMEM;
	}

	pdata->reg_step = 4;
	if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
		pdata->reg_size = 2;
	} else {
		pdata->reg_size = 4;
		pdata->has_ccr = true;
	}

	if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
		/* The FIFO has 128 locations */
		pdata->buffer_size = 0x80;
	} else if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
		if (id == 2)
			/* The FIFO has 1024 + 256 locations */
			pdata->buffer_size = 0x500;
		else
			/* The FIFO has 128 locations */
			pdata->buffer_size = 0x80;
	} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
		/* The FIFO has 128 locations for all instances */
		pdata->buffer_size = 0x80;
	}

	if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
		pdata->has_wakeup = true;

	oh_device[0] = oh;

	if (oh->dev_attr) {
		oh_device[1] = omap_hwmod_lookup((
		(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
		pdata->enable_st_clock = omap3_enable_st_clock;
		count++;
	}
	pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
				    sizeof(*pdata));
	kfree(pdata);
	if (IS_ERR(pdev))  {
		pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
					name, oh->name);
		return PTR_ERR(pdev);
	}
	return 0;
}

static int __init omap2_mcbsp_init(void)
{
	if (!of_have_populated_dt())
		omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);

	return 0;
}
omap_arch_initcall(omap2_mcbsp_init);
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"
4814ced5	28
1743d14f JN	29	/*
	30	* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
	31	* Sidetone needs non-gated ICLK and sidetone autoidle is broken.
	32	*/
d9a16f9a	33	#include "cm3xxx.h"
1743d14f JN	34	#include "cm-regbits-34xx.h"
1743d14f JN	35
1743d14f JN	36	static int omap3_enable_st_clock(unsigned int id, bool enable)
	37	{
	38	unsigned int w;
	39
	40	/*
	41	* Sidetone uses McBSP ICLK - which must not idle when sidetones
	42	* are enabled or sidetones start sounding ugly.
	43	*/
	44	w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
	45	if (enable)
	46	w &= ~(1 << (id - 2));
	47	else
	48	w \|= 1 << (id - 2);
	49	omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
	50
	51	return 0;
	52	}
	53
9cf793f9	54	static int __init omap_init_mcbsp(struct omap_hwmod oh, void unused)
64bcbd33 KVA	55	{
	56	int id, count = 1;
	57	char *name = "omap-mcbsp";
	58	struct omap_hwmod *oh_device[2];
	59	struct omap_mcbsp_platform_data *pdata = NULL;
3528c58e	60	struct platform_device *pdev;
3cf32bba	61
64bcbd33	62	sscanf(oh->name, "mcbsp%d", &id);
78673bc8	63
64bcbd33 KVA	64	pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
	65	if (!pdata) {
	66	pr_err("%s: No memory for mcbsp\n", __func__);
	67	return -ENOMEM;
	68	}
3cf32bba	69
cdc71514	70	pdata->reg_step = 4;
88408230	71	if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
cdc71514	72	pdata->reg_size = 2;
88408230	73	} else {
cdc71514	74	pdata->reg_size = 4;
88408230 JN	75	pdata->has_ccr = true;
88408230 JN	76	}
9504ba64	77
cafebc4a PU	78	if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
	79	/* The FIFO has 128 locations */
	80	pdata->buffer_size = 0x80;
	81	} else if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
64bcbd33 KVA	82	if (id == 2)
	83	/* The FIFO has 1024 + 256 locations */
	84	pdata->buffer_size = 0x500;
	85	else
	86	/* The FIFO has 128 locations */
	87	pdata->buffer_size = 0x80;
da76250e PU	88	} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
	89	/* The FIFO has 128 locations for all instances */
	90	pdata->buffer_size = 0x80;
64bcbd33	91	}
3cf32bba	92
1a645884 JN	93	if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
	94	pdata->has_wakeup = true;
	95
64bcbd33	96	oh_device[0] = oh;
78673bc8	97
64bcbd33 KVA	98	if (oh->dev_attr) {
	99	oh_device[1] = omap_hwmod_lookup((
	100	(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
1743d14f	101	pdata->enable_st_clock = omap3_enable_st_clock;
64bcbd33 KVA	102	count++;
64bcbd33 KVA	103	}
3528c58e	104	pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
c1d1cd59	105	sizeof(*pdata));
64bcbd33	106	kfree(pdata);
3528c58e	107	if (IS_ERR(pdev)) {
25985edc	108	pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
64bcbd33	109	name, oh->name);
3528c58e	110	return PTR_ERR(pdev);
64bcbd33	111	}
64bcbd33 KVA	112	return 0;
64bcbd33 KVA	113	}
a5b92cc3	114
b4b58f58	115	static int __init omap2_mcbsp_init(void)
78673bc8	116	{
e586e955 PU	117	if (!of_have_populated_dt())
e586e955 PU	118	omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
b4b58f58	119
0210dc4e	120	return 0;
78673bc8	121	}
b76c8b19	122	omap_arch_initcall(omap2_mcbsp_init);