1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * linux/arch/arm/mach-omap2/mcbsp.c
 4 *
 5 * Copyright (C) 2008 Instituto Nokia de Tecnologia
 6 * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
 7 *
 
 
 
 
 8 * Multichannel mode not supported.
 9 */
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/clk.h>
13#include <linux/err.h>
14#include <linux/io.h>
15#include <linux/of.h>
16#include <linux/platform_device.h>
17#include <linux/slab.h>
18#include <linux/platform_data/asoc-ti-mcbsp.h>
19#include <linux/pm_runtime.h>
20
21#include <linux/omap-dma.h>
22
23#include "soc.h"
24#include "omap_device.h"
25#include "clock.h"
26
27/*
28 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
29 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
30 */
31#include "cm3xxx.h"
32#include "cm-regbits-34xx.h"
33
34static int omap3_mcbsp_force_ick_on(struct clk *clk, bool force_on)
35{
36	if (!clk)
37		return 0;
38
39	if (force_on)
40		return omap2_clk_deny_idle(clk);
 
 
 
 
 
 
41	else
42		return omap2_clk_allow_idle(clk);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
43}
44
45void __init omap3_mcbsp_init_pdata_callback(
46					struct omap_mcbsp_platform_data *pdata)
47{
48	if (!pdata)
49		return;
50
51	pdata->force_ick_on = omap3_mcbsp_force_ick_on;
52}

 
  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/of.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>
 23
 24#include <linux/omap-dma.h>
 25
 26#include "soc.h"
 27#include "omap_device.h"
 28#include "clock.h"
 29
 30/*
 31 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
 32 * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
 33 */
 34#include "cm3xxx.h"
 35#include "cm-regbits-34xx.h"
 36
 37static struct clk *mcbsp_iclks[5];
 
 
 
 38
 39static int omap3_enable_st_clock(unsigned int id, bool enable)
 40{
 41	/*
 42	 * Sidetone uses McBSP ICLK - which must not idle when sidetones
 43	 * are enabled or sidetones start sounding ugly.
 44	 */
 45	if (enable)
 46		return omap2_clk_deny_idle(mcbsp_iclks[id]);
 47	else
 48		return omap2_clk_allow_idle(mcbsp_iclks[id]);
 49}
 50
 51static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
 52{
 53	int id, count = 1;
 54	char *name = "omap-mcbsp";
 55	struct omap_hwmod *oh_device[2];
 56	struct omap_mcbsp_platform_data *pdata = NULL;
 57	struct platform_device *pdev;
 58	char clk_name[11];
 59
 60	sscanf(oh->name, "mcbsp%d", &id);
 61
 62	pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
 63	if (!pdata) {
 64		pr_err("%s: No memory for mcbsp\n", __func__);
 65		return -ENOMEM;
 66	}
 67
 68	pdata->reg_step = 4;
 69	if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
 70		pdata->reg_size = 2;
 71	} else {
 72		pdata->reg_size = 4;
 73		pdata->has_ccr = true;
 74	}
 75
 76	if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
 77		/* The FIFO has 128 locations */
 78		pdata->buffer_size = 0x80;
 79	} else if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
 80		if (id == 2)
 81			/* The FIFO has 1024 + 256 locations */
 82			pdata->buffer_size = 0x500;
 83		else
 84			/* The FIFO has 128 locations */
 85			pdata->buffer_size = 0x80;
 86	} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
 87		/* The FIFO has 128 locations for all instances */
 88		pdata->buffer_size = 0x80;
 89	}
 90
 91	if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
 92		pdata->has_wakeup = true;
 93
 94	oh_device[0] = oh;
 95
 96	if (oh->dev_attr) {
 97		oh_device[1] = omap_hwmod_lookup((
 98		(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
 99		pdata->enable_st_clock = omap3_enable_st_clock;
100		sprintf(clk_name, "mcbsp%d_ick", id);
101		mcbsp_iclks[id] = clk_get(NULL, clk_name);
102		count++;
103	}
104	pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
105				    sizeof(*pdata));
106	kfree(pdata);
107	if (IS_ERR(pdev))  {
108		pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
109					name, oh->name);
110		return PTR_ERR(pdev);
111	}
112	return 0;
113}
114
115static int __init omap2_mcbsp_init(void)
 
116{
117	if (!of_have_populated_dt())
118		omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
119
120	return 0;
121}
122omap_arch_initcall(omap2_mcbsp_init);