[deliverable/linux.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>

/*
 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
 */
#include "cm2xxx_3xxx.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), NULL, 0, false);
	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)
{
	omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);

	return 0;
}
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	27
1743d14f JN	28	/*
	29	* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
	30	* Sidetone needs non-gated ICLK and sidetone autoidle is broken.
	31	*/
	32	#include "cm2xxx_3xxx.h"
	33	#include "cm-regbits-34xx.h"
	34
1743d14f JN	35	static int omap3_enable_st_clock(unsigned int id, bool enable)
	36	{
	37	unsigned int w;
	38
	39	/*
	40	* Sidetone uses McBSP ICLK - which must not idle when sidetones
	41	* are enabled or sidetones start sounding ugly.
	42	*/
	43	w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
	44	if (enable)
	45	w &= ~(1 << (id - 2));
	46	else
	47	w \|= 1 << (id - 2);
	48	omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
	49
	50	return 0;
	51	}
	52
9cf793f9	53	static int __init omap_init_mcbsp(struct omap_hwmod oh, void unused)
64bcbd33 KVA	54	{
	55	int id, count = 1;
	56	char *name = "omap-mcbsp";
	57	struct omap_hwmod *oh_device[2];
	58	struct omap_mcbsp_platform_data *pdata = NULL;
3528c58e	59	struct platform_device *pdev;
3cf32bba	60
64bcbd33	61	sscanf(oh->name, "mcbsp%d", &id);
78673bc8	62
64bcbd33 KVA	63	pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
	64	if (!pdata) {
	65	pr_err("%s: No memory for mcbsp\n", __func__);
	66	return -ENOMEM;
	67	}
3cf32bba	68
cdc71514	69	pdata->reg_step = 4;
88408230	70	if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
cdc71514	71	pdata->reg_size = 2;
88408230	72	} else {
cdc71514	73	pdata->reg_size = 4;
88408230 JN	74	pdata->has_ccr = true;
88408230 JN	75	}
40c0764b	76
cafebc4a PU	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) {
64bcbd33 KVA	81	if (id == 2)
	82	/* The FIFO has 1024 + 256 locations */
	83	pdata->buffer_size = 0x500;
	84	else
	85	/* The FIFO has 128 locations */
	86	pdata->buffer_size = 0x80;
da76250e PU	87	} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
	88	/* The FIFO has 128 locations for all instances */
	89	pdata->buffer_size = 0x80;
64bcbd33	90	}
3cf32bba	91
1a645884 JN	92	if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
	93	pdata->has_wakeup = true;
	94
64bcbd33	95	oh_device[0] = oh;
78673bc8	96
64bcbd33 KVA	97	if (oh->dev_attr) {
	98	oh_device[1] = omap_hwmod_lookup((
	99	(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
1743d14f	100	pdata->enable_st_clock = omap3_enable_st_clock;
64bcbd33 KVA	101	count++;
64bcbd33 KVA	102	}
3528c58e	103	pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
f718e2c0	104	sizeof(*pdata), NULL, 0, false);
64bcbd33	105	kfree(pdata);
3528c58e	106	if (IS_ERR(pdev)) {
25985edc	107	pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
64bcbd33	108	name, oh->name);
3528c58e	109	return PTR_ERR(pdev);
64bcbd33	110	}
64bcbd33 KVA	111	return 0;
64bcbd33 KVA	112	}
a5b92cc3	113
b4b58f58	114	static int __init omap2_mcbsp_init(void)
78673bc8	115	{
64bcbd33	116	omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
b4b58f58	117
0210dc4e	118	return 0;
78673bc8 EV	119	}
78673bc8 EV	120	arch_initcall(omap2_mcbsp_init);