1 /*
2  * r8a7792 Clock Pulse Generator / Module Standby and Software Reset
3  *
4  * Copyright (C) 2017 Glider bvba
5  *
6  * Based on clk-rcar-gen2.c
7  *
8  * Copyright (C) 2013 Ideas On Board SPRL
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; version 2 of the License.
13  */
14 
15 #include <linux/device.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/soc/renesas/rcar-rst.h>
19 
20 #include <dt-bindings/clock/r8a7792-cpg-mssr.h>
21 
22 #include "renesas-cpg-mssr.h"
23 #include "rcar-gen2-cpg.h"
24 
25 enum clk_ids {
26 	/* Core Clock Outputs exported to DT */
27 	LAST_DT_CORE_CLK = R8A7792_CLK_OSC,
28 
29 	/* External Input Clocks */
30 	CLK_EXTAL,
31 
32 	/* Internal Core Clocks */
33 	CLK_MAIN,
34 	CLK_PLL0,
35 	CLK_PLL1,
36 	CLK_PLL3,
37 	CLK_PLL1_DIV2,
38 
39 	/* Module Clocks */
40 	MOD_CLK_BASE
41 };
42 
43 static const struct cpg_core_clk r8a7792_core_clks[] __initconst = {
44 	/* External Clock Inputs */
45 	DEF_INPUT("extal",     CLK_EXTAL),
46 
47 	/* Internal Core Clocks */
48 	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
49 	DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
50 	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
51 	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),
52 
53 	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
54 
55 	/* Core Clock Outputs */
56 	DEF_BASE("qspi", R8A7792_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
57 
58 	DEF_FIXED("z",      R8A7792_CLK_Z,     CLK_PLL0,          1, 1),
59 	DEF_FIXED("zg",     R8A7792_CLK_ZG,    CLK_PLL1,          5, 1),
60 	DEF_FIXED("zx",     R8A7792_CLK_ZX,    CLK_PLL1,          3, 1),
61 	DEF_FIXED("zs",     R8A7792_CLK_ZS,    CLK_PLL1,          6, 1),
62 	DEF_FIXED("hp",     R8A7792_CLK_HP,    CLK_PLL1,         12, 1),
63 	DEF_FIXED("i",      R8A7792_CLK_I,     CLK_PLL1,          3, 1),
64 	DEF_FIXED("b",      R8A7792_CLK_B,     CLK_PLL1,         12, 1),
65 	DEF_FIXED("lb",     R8A7792_CLK_LB,    CLK_PLL1,         24, 1),
66 	DEF_FIXED("p",      R8A7792_CLK_P,     CLK_PLL1,         24, 1),
67 	DEF_FIXED("cl",     R8A7792_CLK_CL,    CLK_PLL1,         48, 1),
68 	DEF_FIXED("m2",     R8A7792_CLK_M2,    CLK_PLL1,          8, 1),
69 	DEF_FIXED("imp",    R8A7792_CLK_IMP,   CLK_PLL1,          4, 1),
70 	DEF_FIXED("zb3",    R8A7792_CLK_ZB3,   CLK_PLL3,          4, 1),
71 	DEF_FIXED("zb3d2",  R8A7792_CLK_ZB3D2, CLK_PLL3,          8, 1),
72 	DEF_FIXED("ddr",    R8A7792_CLK_DDR,   CLK_PLL3,          8, 1),
73 	DEF_FIXED("sd",     R8A7792_CLK_SD,    CLK_PLL1_DIV2,     8, 1),
74 	DEF_FIXED("mp",     R8A7792_CLK_MP,    CLK_PLL1_DIV2,    15, 1),
75 	DEF_FIXED("cp",     R8A7792_CLK_CP,    CLK_PLL1,         48, 1),
76 	DEF_FIXED("cpex",   R8A7792_CLK_CPEX,  CLK_EXTAL,         2, 1),
77 	DEF_FIXED("rcan",   R8A7792_CLK_RCAN,  CLK_PLL1_DIV2,    49, 1),
78 	DEF_FIXED("r",      R8A7792_CLK_R,     CLK_PLL1,      49152, 1),
79 	DEF_FIXED("osc",    R8A7792_CLK_OSC,   CLK_PLL1,      12288, 1),
80 };
81 
82 static const struct mssr_mod_clk r8a7792_mod_clks[] __initconst = {
83 	DEF_MOD("msiof0",		   0,	R8A7792_CLK_MP),
84 	DEF_MOD("jpu",			 106,	R8A7792_CLK_M2),
85 	DEF_MOD("tmu1",			 111,	R8A7792_CLK_P),
86 	DEF_MOD("3dg",			 112,	R8A7792_CLK_ZG),
87 	DEF_MOD("2d-dmac",		 115,	R8A7792_CLK_ZS),
88 	DEF_MOD("tmu3",			 121,	R8A7792_CLK_P),
89 	DEF_MOD("tmu2",			 122,	R8A7792_CLK_P),
90 	DEF_MOD("cmt0",			 124,	R8A7792_CLK_R),
91 	DEF_MOD("tmu0",			 125,	R8A7792_CLK_CP),
92 	DEF_MOD("vsp1du1",		 127,	R8A7792_CLK_ZS),
93 	DEF_MOD("vsp1du0",		 128,	R8A7792_CLK_ZS),
94 	DEF_MOD("vsp1-sy",		 131,	R8A7792_CLK_ZS),
95 	DEF_MOD("msiof1",		 208,	R8A7792_CLK_MP),
96 	DEF_MOD("sys-dmac1",		 218,	R8A7792_CLK_ZS),
97 	DEF_MOD("sys-dmac0",		 219,	R8A7792_CLK_ZS),
98 	DEF_MOD("tpu0",			 304,	R8A7792_CLK_CP),
99 	DEF_MOD("sdhi0",		 314,	R8A7792_CLK_SD),
100 	DEF_MOD("cmt1",			 329,	R8A7792_CLK_R),
101 	DEF_MOD("rwdt",			 402,	R8A7792_CLK_R),
102 	DEF_MOD("irqc",			 407,	R8A7792_CLK_CP),
103 	DEF_MOD("intc-sys",		 408,	R8A7792_CLK_ZS),
104 	DEF_MOD("audio-dmac0",		 502,	R8A7792_CLK_HP),
105 	DEF_MOD("thermal",		 522,	CLK_EXTAL),
106 	DEF_MOD("pwm",			 523,	R8A7792_CLK_P),
107 	DEF_MOD("hscif1",		 716,	R8A7792_CLK_ZS),
108 	DEF_MOD("hscif0",		 717,	R8A7792_CLK_ZS),
109 	DEF_MOD("scif3",		 718,	R8A7792_CLK_P),
110 	DEF_MOD("scif2",		 719,	R8A7792_CLK_P),
111 	DEF_MOD("scif1",		 720,	R8A7792_CLK_P),
112 	DEF_MOD("scif0",		 721,	R8A7792_CLK_P),
113 	DEF_MOD("du1",			 723,	R8A7792_CLK_ZX),
114 	DEF_MOD("du0",			 724,	R8A7792_CLK_ZX),
115 	DEF_MOD("vin5",			 804,	R8A7792_CLK_ZG),
116 	DEF_MOD("vin4",			 805,	R8A7792_CLK_ZG),
117 	DEF_MOD("vin3",			 808,	R8A7792_CLK_ZG),
118 	DEF_MOD("vin2",			 809,	R8A7792_CLK_ZG),
119 	DEF_MOD("vin1",			 810,	R8A7792_CLK_ZG),
120 	DEF_MOD("vin0",			 811,	R8A7792_CLK_ZG),
121 	DEF_MOD("etheravb",		 812,	R8A7792_CLK_HP),
122 	DEF_MOD("imr-lx3",		 821,	R8A7792_CLK_ZG),
123 	DEF_MOD("imr-lsx3-1",		 822,	R8A7792_CLK_ZG),
124 	DEF_MOD("imr-lsx3-0",		 823,	R8A7792_CLK_ZG),
125 	DEF_MOD("imr-lsx3-5",		 825,	R8A7792_CLK_ZG),
126 	DEF_MOD("imr-lsx3-4",		 826,	R8A7792_CLK_ZG),
127 	DEF_MOD("imr-lsx3-3",		 827,	R8A7792_CLK_ZG),
128 	DEF_MOD("imr-lsx3-2",		 828,	R8A7792_CLK_ZG),
129 	DEF_MOD("gyro-adc",		 901,	R8A7792_CLK_P),
130 	DEF_MOD("gpio7",		 904,	R8A7792_CLK_CP),
131 	DEF_MOD("gpio6",		 905,	R8A7792_CLK_CP),
132 	DEF_MOD("gpio5",		 907,	R8A7792_CLK_CP),
133 	DEF_MOD("gpio4",		 908,	R8A7792_CLK_CP),
134 	DEF_MOD("gpio3",		 909,	R8A7792_CLK_CP),
135 	DEF_MOD("gpio2",		 910,	R8A7792_CLK_CP),
136 	DEF_MOD("gpio1",		 911,	R8A7792_CLK_CP),
137 	DEF_MOD("gpio0",		 912,	R8A7792_CLK_CP),
138 	DEF_MOD("gpio11",		 913,	R8A7792_CLK_CP),
139 	DEF_MOD("gpio10",		 914,	R8A7792_CLK_CP),
140 	DEF_MOD("can1",			 915,	R8A7792_CLK_P),
141 	DEF_MOD("can0",			 916,	R8A7792_CLK_P),
142 	DEF_MOD("qspi_mod",		 917,	R8A7792_CLK_QSPI),
143 	DEF_MOD("gpio9",		 919,	R8A7792_CLK_CP),
144 	DEF_MOD("gpio8",		 921,	R8A7792_CLK_CP),
145 	DEF_MOD("i2c5",			 925,	R8A7792_CLK_HP),
146 	DEF_MOD("iicdvfs",		 926,	R8A7792_CLK_CP),
147 	DEF_MOD("i2c4",			 927,	R8A7792_CLK_HP),
148 	DEF_MOD("i2c3",			 928,	R8A7792_CLK_HP),
149 	DEF_MOD("i2c2",			 929,	R8A7792_CLK_HP),
150 	DEF_MOD("i2c1",			 930,	R8A7792_CLK_HP),
151 	DEF_MOD("i2c0",			 931,	R8A7792_CLK_HP),
152 	DEF_MOD("ssi-all",		1005,	R8A7792_CLK_P),
153 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
154 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
155 };
156 
157 static const unsigned int r8a7792_crit_mod_clks[] __initconst = {
158 	MOD_CLK_ID(402),	/* RWDT */
159 	MOD_CLK_ID(408),	/* INTC-SYS (GIC) */
160 };
161 
162 /*
163  * CPG Clock Data
164  */
165 
166 /*
167  *   MD		EXTAL		PLL0	PLL1	PLL3
168  * 14 13 19	(MHz)		*1	*2
169  *---------------------------------------------------
170  * 0  0  0	15		x200/3	x208/2	x106
171  * 0  0  1	15		x200/3	x208/2	x88
172  * 0  1  0	20		x150/3	x156/2	x80
173  * 0  1  1	20		x150/3	x156/2	x66
174  * 1  0  0	26 / 2		x230/3	x240/2	x122
175  * 1  0  1	26 / 2		x230/3	x240/2	x102
176  * 1  1  0	30 / 2		x200/3	x208/2	x106
177  * 1  1  1	30 / 2		x200/3	x208/2	x88
178  *
179  * *1 :	Table 7.5b indicates VCO output (PLL0 = VCO/3)
180  * *2 :	Table 7.5b indicates VCO output (PLL1 = VCO/2)
181  */
182 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 12) | \
183 					 (((md) & BIT(13)) >> 12) | \
184 					 (((md) & BIT(19)) >> 19))
185 static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[8] __initconst = {
186 	{ 1, 208, 106, 200 },
187 	{ 1, 208,  88, 200 },
188 	{ 1, 156,  80, 150 },
189 	{ 1, 156,  66, 150 },
190 	{ 2, 240, 122, 230 },
191 	{ 2, 240, 102, 230 },
192 	{ 2, 208, 106, 200 },
193 	{ 2, 208,  88, 200 },
194 };
195 
196 static int __init r8a7792_cpg_mssr_init(struct device *dev)
197 {
198 	const struct rcar_gen2_cpg_pll_config *cpg_pll_config;
199 	u32 cpg_mode;
200 	int error;
201 
202 	error = rcar_rst_read_mode_pins(&cpg_mode);
203 	if (error)
204 		return error;
205 
206 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
207 
208 	return rcar_gen2_cpg_init(cpg_pll_config, 3, cpg_mode);
209 }
210 
211 const struct cpg_mssr_info r8a7792_cpg_mssr_info __initconst = {
212 	/* Core Clocks */
213 	.core_clks = r8a7792_core_clks,
214 	.num_core_clks = ARRAY_SIZE(r8a7792_core_clks),
215 	.last_dt_core_clk = LAST_DT_CORE_CLK,
216 	.num_total_core_clks = MOD_CLK_BASE,
217 
218 	/* Module Clocks */
219 	.mod_clks = r8a7792_mod_clks,
220 	.num_mod_clks = ARRAY_SIZE(r8a7792_mod_clks),
221 	.num_hw_mod_clks = 12 * 32,
222 
223 	/* Critical Module Clocks */
224 	.crit_mod_clks = r8a7792_crit_mod_clks,
225 	.num_crit_mod_clks = ARRAY_SIZE(r8a7792_crit_mod_clks),
226 
227 	/* Callbacks */
228 	.init = r8a7792_cpg_mssr_init,
229 	.cpg_clk_register = rcar_gen2_cpg_clk_register,
230 };
231