[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/platform_device.h>
#include <linux/slab.h>

#include <mach/irqs.h>
#include <plat/dma.h>
#include <plat/cpu.h>
#include <plat/mcbsp.h>
#include <plat/omap_device.h>
#include <linux/pm_runtime.h>

#include "control.h"

/* McBSP internal signal muxing functions */

void omap2_mcbsp1_mux_clkr_src(u8 mux)
{
	u32 v;

	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	if (mux == CLKR_SRC_CLKR)
		v &= ~OMAP2_MCBSP1_CLKR_MASK;
	else if (mux == CLKR_SRC_CLKX)
		v |= OMAP2_MCBSP1_CLKR_MASK;
	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
}
EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);

void omap2_mcbsp1_mux_fsr_src(u8 mux)
{
	u32 v;

	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	if (mux == FSR_SRC_FSR)
		v &= ~OMAP2_MCBSP1_FSR_MASK;
	else if (mux == FSR_SRC_FSX)
		v |= OMAP2_MCBSP1_FSR_MASK;
	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
}
EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);

/* McBSP CLKS source switching function */

int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
{
	struct omap_mcbsp *mcbsp;
	struct clk *fck_src;
	char *fck_src_name;
	int r;

	if (!omap_mcbsp_check_valid_id(id)) {
		pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
		return -EINVAL;
	}
	mcbsp = id_to_mcbsp_ptr(id);

	if (fck_src_id == MCBSP_CLKS_PAD_SRC)
		fck_src_name = "pad_fck";
	else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
		fck_src_name = "prcm_fck";
	else
		return -EINVAL;

	fck_src = clk_get(mcbsp->dev, fck_src_name);
	if (IS_ERR_OR_NULL(fck_src)) {
		pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
		       fck_src_name);
		return -EINVAL;
	}

	pm_runtime_put_sync(mcbsp->dev);

	r = clk_set_parent(mcbsp->fclk, fck_src);
	if (IS_ERR_VALUE(r)) {
		pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
		       "clks", fck_src_name);
		clk_put(fck_src);
		return -EINVAL;
	}

	pm_runtime_get_sync(mcbsp->dev);

	clk_put(fck_src);

	return 0;
}
EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);

struct omap_device_pm_latency omap2_mcbsp_latency[] = {
	{
		.deactivate_func = omap_device_idle_hwmods,
		.activate_func   = omap_device_enable_hwmods,
		.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
	},
};

static int 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 omap_device *od;

	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->mcbsp_config_type = oh->class->rev;

	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;
	}

	oh_device[0] = oh;

	if (oh->dev_attr) {
		oh_device[1] = omap_hwmod_lookup((
		(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
		count++;
	}
	od = omap_device_build_ss(name, id, oh_device, count, pdata,
				sizeof(*pdata), omap2_mcbsp_latency,
				ARRAY_SIZE(omap2_mcbsp_latency), false);
	kfree(pdata);
	if (IS_ERR(od))  {
		pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
					name, oh->name);
		return PTR_ERR(od);
	}
	omap_mcbsp_count++;
	return 0;
}

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

	mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
								GFP_KERNEL);
	if (!mcbsp_ptr)
		return -ENOMEM;

	return omap_mcbsp_init();
}
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>
	18	#include <linux/platform_device.h>
5a0e3ad6	19	#include <linux/slab.h>
78673bc8	20
dd7667aa	21	#include <mach/irqs.h>
ce491cf8	22	#include <plat/dma.h>
ce491cf8 TL	23	#include <plat/cpu.h>
ce491cf8 TL	24	#include <plat/mcbsp.h>
64bcbd33	25	#include <plat/omap_device.h>
e95496d4	26	#include <linux/pm_runtime.h>
4814ced5 PW	27
	28	#include "control.h"
	29
cf4c87ab PW	30	/* McBSP internal signal muxing functions */
	31
	32	void omap2_mcbsp1_mux_clkr_src(u8 mux)
	33	{
	34	u32 v;
	35
	36	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	37	if (mux == CLKR_SRC_CLKR)
425925dd	38	v &= ~OMAP2_MCBSP1_CLKR_MASK;
cf4c87ab PW	39	else if (mux == CLKR_SRC_CLKX)
	40	v \|= OMAP2_MCBSP1_CLKR_MASK;
	41	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
	42	}
	43	EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
	44
	45	void omap2_mcbsp1_mux_fsr_src(u8 mux)
	46	{
	47	u32 v;
	48
	49	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
	50	if (mux == FSR_SRC_FSR)
425925dd	51	v &= ~OMAP2_MCBSP1_FSR_MASK;
cf4c87ab PW	52	else if (mux == FSR_SRC_FSX)
	53	v \|= OMAP2_MCBSP1_FSR_MASK;
	54	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
	55	}
	56	EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
	57
d1358657 PW	58	/* McBSP CLKS source switching function */
	59
	60	int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
	61	{
	62	struct omap_mcbsp *mcbsp;
	63	struct clk *fck_src;
	64	char *fck_src_name;
	65	int r;
	66
	67	if (!omap_mcbsp_check_valid_id(id)) {
	68	pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
	69	return -EINVAL;
	70	}
	71	mcbsp = id_to_mcbsp_ptr(id);
	72
	73	if (fck_src_id == MCBSP_CLKS_PAD_SRC)
	74	fck_src_name = "pad_fck";
	75	else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
	76	fck_src_name = "prcm_fck";
	77	else
	78	return -EINVAL;
	79
	80	fck_src = clk_get(mcbsp->dev, fck_src_name);
	81	if (IS_ERR_OR_NULL(fck_src)) {
	82	pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
	83	fck_src_name);
	84	return -EINVAL;
	85	}
	86
e95496d4	87	pm_runtime_put_sync(mcbsp->dev);
d1358657 PW	88
	89	r = clk_set_parent(mcbsp->fclk, fck_src);
	90	if (IS_ERR_VALUE(r)) {
	91	pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
	92	"clks", fck_src_name);
	93	clk_put(fck_src);
	94	return -EINVAL;
	95	}
	96
e95496d4	97	pm_runtime_get_sync(mcbsp->dev);
d1358657 PW	98
	99	clk_put(fck_src);
	100
	101	return 0;
	102	}
	103	EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
	104
64bcbd33	105	struct omap_device_pm_latency omap2_mcbsp_latency[] = {
78673bc8	106	{
64bcbd33 KVA	107	.deactivate_func = omap_device_idle_hwmods,
	108	.activate_func = omap_device_enable_hwmods,
	109	.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
78673bc8 EV	110	},
78673bc8 EV	111	};
05228c35	112
64bcbd33 KVA	113	static int omap_init_mcbsp(struct omap_hwmod oh, void unused)
	114	{
	115	int id, count = 1;
	116	char *name = "omap-mcbsp";
	117	struct omap_hwmod *oh_device[2];
	118	struct omap_mcbsp_platform_data *pdata = NULL;
	119	struct omap_device *od;
3cf32bba	120
64bcbd33	121	sscanf(oh->name, "mcbsp%d", &id);
78673bc8	122
64bcbd33 KVA	123	pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
	124	if (!pdata) {
	125	pr_err("%s: No memory for mcbsp\n", __func__);
	126	return -ENOMEM;
	127	}
3cf32bba	128
9504ba64 KVA	129	pdata->mcbsp_config_type = oh->class->rev;
9504ba64 KVA	130
64bcbd33 KVA	131	if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
	132	if (id == 2)
	133	/* The FIFO has 1024 + 256 locations */
	134	pdata->buffer_size = 0x500;
	135	else
	136	/* The FIFO has 128 locations */
	137	pdata->buffer_size = 0x80;
	138	}
3cf32bba	139
64bcbd33	140	oh_device[0] = oh;
78673bc8	141
64bcbd33 KVA	142	if (oh->dev_attr) {
	143	oh_device[1] = omap_hwmod_lookup((
	144	(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
	145	count++;
	146	}
	147	od = omap_device_build_ss(name, id, oh_device, count, pdata,
	148	sizeof(*pdata), omap2_mcbsp_latency,
	149	ARRAY_SIZE(omap2_mcbsp_latency), false);
	150	kfree(pdata);
	151	if (IS_ERR(od)) {
25985edc	152	pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
64bcbd33 KVA	153	name, oh->name);
	154	return PTR_ERR(od);
	155	}
	156	omap_mcbsp_count++;
	157	return 0;
	158	}
a5b92cc3	159
b4b58f58	160	static int __init omap2_mcbsp_init(void)
78673bc8	161	{
64bcbd33	162	omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
b4b58f58 CS	163
	164	mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
	165	GFP_KERNEL);
	166	if (!mcbsp_ptr)
	167	return -ENOMEM;
	168
78673bc8 EV	169	return omap_mcbsp_init();
	170	}
	171	arch_initcall(omap2_mcbsp_init);