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1 /*
2 * Copyright (c) 2012, 2013, NVIDIA CORPORATION. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #include <linux/io.h>
18 #include <linux/clk.h>
19 #include <linux/clk-provider.h>
20 #include <linux/of.h>
21 #include <linux/of_address.h>
22 #include <linux/delay.h>
23 #include <linux/export.h>
24 #include <linux/clk/tegra.h>
25
26 #include "clk.h"
27 #include "clk-id.h"
28
29 #define AUDIO_SYNC_CLK_I2S0 0x4a0
30 #define AUDIO_SYNC_CLK_I2S1 0x4a4
31 #define AUDIO_SYNC_CLK_I2S2 0x4a8
32 #define AUDIO_SYNC_CLK_I2S3 0x4ac
33 #define AUDIO_SYNC_CLK_I2S4 0x4b0
34 #define AUDIO_SYNC_CLK_SPDIF 0x4b4
35
36 #define AUDIO_SYNC_DOUBLER 0x49c
37
38 #define PLLA_OUT 0xb4
39
40 struct tegra_sync_source_initdata {
41 char *name;
42 unsigned long rate;
43 unsigned long max_rate;
44 int clk_id;
45 };
46
47 #define SYNC(_name) \
48 {\
49 .name = #_name,\
50 .rate = 24000000,\
51 .max_rate = 24000000,\
52 .clk_id = tegra_clk_ ## _name,\
53 }
54
55 struct tegra_audio_clk_initdata {
56 char *gate_name;
57 char *mux_name;
58 u32 offset;
59 int gate_clk_id;
60 int mux_clk_id;
61 };
62
63 #define AUDIO(_name, _offset) \
64 {\
65 .gate_name = #_name,\
66 .mux_name = #_name"_mux",\
67 .offset = _offset,\
68 .gate_clk_id = tegra_clk_ ## _name,\
69 .mux_clk_id = tegra_clk_ ## _name ## _mux,\
70 }
71
72 struct tegra_audio2x_clk_initdata {
73 char *parent;
74 char *gate_name;
75 char *name_2x;
76 char *div_name;
77 int clk_id;
78 int clk_num;
79 u8 div_offset;
80 };
81
82 #define AUDIO2X(_name, _num, _offset) \
83 {\
84 .parent = #_name,\
85 .gate_name = #_name"_2x",\
86 .name_2x = #_name"_doubler",\
87 .div_name = #_name"_div",\
88 .clk_id = tegra_clk_ ## _name ## _2x,\
89 .clk_num = _num,\
90 .div_offset = _offset,\
91 }
92
93 static DEFINE_SPINLOCK(clk_doubler_lock);
94
95 static const char *mux_audio_sync_clk[] = { "spdif_in_sync", "i2s0_sync",
96 "i2s1_sync", "i2s2_sync", "i2s3_sync", "i2s4_sync", "vimclk_sync",
97 };
98
99 static struct tegra_sync_source_initdata sync_source_clks[] __initdata = {
100 SYNC(spdif_in_sync),
101 SYNC(i2s0_sync),
102 SYNC(i2s1_sync),
103 SYNC(i2s2_sync),
104 SYNC(i2s3_sync),
105 SYNC(i2s4_sync),
106 SYNC(vimclk_sync),
107 };
108
109 static struct tegra_audio_clk_initdata audio_clks[] = {
110 AUDIO(audio0, AUDIO_SYNC_CLK_I2S0),
111 AUDIO(audio1, AUDIO_SYNC_CLK_I2S1),
112 AUDIO(audio2, AUDIO_SYNC_CLK_I2S2),
113 AUDIO(audio3, AUDIO_SYNC_CLK_I2S3),
114 AUDIO(audio4, AUDIO_SYNC_CLK_I2S4),
115 AUDIO(spdif, AUDIO_SYNC_CLK_SPDIF),
116 };
117
118 static struct tegra_audio2x_clk_initdata audio2x_clks[] = {
119 AUDIO2X(audio0, 113, 24),
120 AUDIO2X(audio1, 114, 25),
121 AUDIO2X(audio2, 115, 26),
122 AUDIO2X(audio3, 116, 27),
123 AUDIO2X(audio4, 117, 28),
124 AUDIO2X(spdif, 118, 29),
125 };
126
127 void __init tegra_audio_clk_init(void __iomem *clk_base,
128 void __iomem *pmc_base, struct tegra_clk *tegra_clks,
129 struct tegra_clk_pll_params *pll_a_params)
130 {
131 struct clk *clk;
132 struct clk **dt_clk;
133 int i;
134
135 /* PLLA */
136 dt_clk = tegra_lookup_dt_id(tegra_clk_pll_a, tegra_clks);
137 if (dt_clk) {
138 clk = tegra_clk_register_pll("pll_a", "pll_p_out1", clk_base,
139 pmc_base, 0, pll_a_params, NULL);
140 *dt_clk = clk;
141 }
142
143 /* PLLA_OUT0 */
144 dt_clk = tegra_lookup_dt_id(tegra_clk_pll_a_out0, tegra_clks);
145 if (dt_clk) {
146 clk = tegra_clk_register_divider("pll_a_out0_div", "pll_a",
147 clk_base + PLLA_OUT, 0, TEGRA_DIVIDER_ROUND_UP,
148 8, 8, 1, NULL);
149 clk = tegra_clk_register_pll_out("pll_a_out0", "pll_a_out0_div",
150 clk_base + PLLA_OUT, 1, 0, CLK_IGNORE_UNUSED |
151 CLK_SET_RATE_PARENT, 0, NULL);
152 *dt_clk = clk;
153 }
154
155 for (i = 0; i < ARRAY_SIZE(sync_source_clks); i++) {
156 struct tegra_sync_source_initdata *data;
157
158 data = &sync_source_clks[i];
159
160 dt_clk = tegra_lookup_dt_id(data->clk_id, tegra_clks);
161 if (!dt_clk)
162 continue;
163
164 clk = tegra_clk_register_sync_source(data->name,
165 data->rate, data->max_rate);
166 *dt_clk = clk;
167 }
168
169 for (i = 0; i < ARRAY_SIZE(audio_clks); i++) {
170 struct tegra_audio_clk_initdata *data;
171
172 data = &audio_clks[i];
173 dt_clk = tegra_lookup_dt_id(data->mux_clk_id, tegra_clks);
174
175 if (!dt_clk)
176 continue;
177 clk = clk_register_mux(NULL, data->mux_name, mux_audio_sync_clk,
178 ARRAY_SIZE(mux_audio_sync_clk),
179 CLK_SET_RATE_NO_REPARENT,
180 clk_base + data->offset, 0, 3, 0,
181 NULL);
182 *dt_clk = clk;
183
184 dt_clk = tegra_lookup_dt_id(data->gate_clk_id, tegra_clks);
185 if (!dt_clk)
186 continue;
187
188 clk = clk_register_gate(NULL, data->gate_name, data->mux_name,
189 0, clk_base + data->offset, 4,
190 CLK_GATE_SET_TO_DISABLE, NULL);
191 *dt_clk = clk;
192 }
193
194 for (i = 0; i < ARRAY_SIZE(audio2x_clks); i++) {
195 struct tegra_audio2x_clk_initdata *data;
196
197 data = &audio2x_clks[i];
198 dt_clk = tegra_lookup_dt_id(data->clk_id, tegra_clks);
199 if (!dt_clk)
200 continue;
201
202 clk = clk_register_fixed_factor(NULL, data->name_2x,
203 data->parent, CLK_SET_RATE_PARENT, 2, 1);
204 clk = tegra_clk_register_divider(data->div_name,
205 data->name_2x, clk_base + AUDIO_SYNC_DOUBLER,
206 0, 0, data->div_offset, 1, 0,
207 &clk_doubler_lock);
208 clk = tegra_clk_register_periph_gate(data->gate_name,
209 data->div_name, TEGRA_PERIPH_NO_RESET,
210 clk_base, CLK_SET_RATE_PARENT, data->clk_num,
211 periph_clk_enb_refcnt);
212 *dt_clk = clk;
213 }
214 }
215