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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/platform_device.h>
19#include <linux/slab.h>
20
21#include <mach/irqs.h>
22#include <plat/dma.h>
23#include <plat/cpu.h>
24#include <plat/mcbsp.h>
25#include <plat/omap_device.h>
26#include <linux/pm_runtime.h>
27
28#include "control.h"
29
30/* McBSP internal signal muxing functions */
31
32void 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)
38 v &= ~OMAP2_MCBSP1_CLKR_MASK;
39 else if (mux == CLKR_SRC_CLKX)
40 v |= OMAP2_MCBSP1_CLKR_MASK;
41 omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
42}
43EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
44
45void 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)
51 v &= ~OMAP2_MCBSP1_FSR_MASK;
52 else if (mux == FSR_SRC_FSX)
53 v |= OMAP2_MCBSP1_FSR_MASK;
54 omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
55}
56EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
57
58/* McBSP CLKS source switching function */
59
60int 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
87 pm_runtime_put_sync(mcbsp->dev);
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
97 pm_runtime_get_sync(mcbsp->dev);
98
99 clk_put(fck_src);
100
101 return 0;
102}
103EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
104
105struct omap_device_pm_latency omap2_mcbsp_latency[] = {
106 {
107 .deactivate_func = omap_device_idle_hwmods,
108 .activate_func = omap_device_enable_hwmods,
109 .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
110 },
111};
112
113static 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;
120
121 sscanf(oh->name, "mcbsp%d", &id);
122
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 }
128
129 pdata->mcbsp_config_type = oh->class->rev;
130
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 }
139
140 oh_device[0] = oh;
141
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)) {
152 pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
153 name, oh->name);
154 return PTR_ERR(od);
155 }
156 omap_mcbsp_count++;
157 return 0;
158}
159
160static int __init omap2_mcbsp_init(void)
161{
162 omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
163
164 mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
165 GFP_KERNEL);
166 if (!mcbsp_ptr)
167 return -ENOMEM;
168
169 return omap_mcbsp_init();
170}
171arch_initcall(omap2_mcbsp_init);