122 lines
3.0 KiB
C
122 lines
3.0 KiB
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 "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), 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)
|
|
{
|
|
if (!of_have_populated_dt())
|
|
omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(omap2_mcbsp_init);
|