1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a7745 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2016 Cogent Embedded Inc.
6  */
7 
8 #include <linux/device.h>
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/soc/renesas/rcar-rst.h>
12 
13 #include <dt-bindings/clock/r8a7745-cpg-mssr.h>
14 
15 #include "renesas-cpg-mssr.h"
16 #include "rcar-gen2-cpg.h"
17 
18 enum clk_ids {
19 	/* Core Clock Outputs exported to DT */
20 	LAST_DT_CORE_CLK = R8A7745_CLK_OSC,
21 
22 	/* External Input Clocks */
23 	CLK_EXTAL,
24 	CLK_USB_EXTAL,
25 
26 	/* Internal Core Clocks */
27 	CLK_MAIN,
28 	CLK_PLL0,
29 	CLK_PLL1,
30 	CLK_PLL3,
31 	CLK_PLL1_DIV2,
32 
33 	/* Module Clocks */
34 	MOD_CLK_BASE
35 };
36 
37 static const struct cpg_core_clk r8a7745_core_clks[] __initconst = {
38 	/* External Clock Inputs */
39 	DEF_INPUT("extal",	CLK_EXTAL),
40 	DEF_INPUT("usb_extal",	CLK_USB_EXTAL),
41 
42 	/* Internal Core Clocks */
43 	DEF_BASE(".main",	CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
44 	DEF_BASE(".pll0",	CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
45 	DEF_BASE(".pll1",	CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
46 	DEF_BASE(".pll3",	CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),
47 
48 	DEF_FIXED(".pll1_div2",	CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
49 
50 	/* Core Clock Outputs */
51 	DEF_BASE("sdh",  R8A7745_CLK_SDH,  CLK_TYPE_GEN2_SDH,	CLK_PLL1),
52 	DEF_BASE("sd0",  R8A7745_CLK_SD0,  CLK_TYPE_GEN2_SD0,	CLK_PLL1),
53 	DEF_BASE("qspi", R8A7745_CLK_QSPI, CLK_TYPE_GEN2_QSPI,	CLK_PLL1_DIV2),
54 	DEF_BASE("rcan", R8A7745_CLK_RCAN, CLK_TYPE_GEN2_RCAN,	CLK_USB_EXTAL),
55 
56 	DEF_FIXED("z2",    R8A7745_CLK_Z2,	CLK_PLL0,	    1, 1),
57 	DEF_FIXED("zg",    R8A7745_CLK_ZG,	CLK_PLL1,	    6, 1),
58 	DEF_FIXED("zx",    R8A7745_CLK_ZX,	CLK_PLL1,	    3, 1),
59 	DEF_FIXED("zs",    R8A7745_CLK_ZS,	CLK_PLL1,	    6, 1),
60 	DEF_FIXED("hp",    R8A7745_CLK_HP,	CLK_PLL1,	   12, 1),
61 	DEF_FIXED("b",     R8A7745_CLK_B,	CLK_PLL1,	   12, 1),
62 	DEF_FIXED("lb",    R8A7745_CLK_LB,	CLK_PLL1,	   24, 1),
63 	DEF_FIXED("p",     R8A7745_CLK_P,	CLK_PLL1,	   24, 1),
64 	DEF_FIXED("cl",    R8A7745_CLK_CL,	CLK_PLL1,	   48, 1),
65 	DEF_FIXED("cp",    R8A7745_CLK_CP,	CLK_PLL1,	   48, 1),
66 	DEF_FIXED("m2",    R8A7745_CLK_M2,	CLK_PLL1,	    8, 1),
67 	DEF_FIXED("zb3",   R8A7745_CLK_ZB3,	CLK_PLL3,	    4, 1),
68 	DEF_FIXED("zb3d2", R8A7745_CLK_ZB3D2,	CLK_PLL3,	    8, 1),
69 	DEF_FIXED("ddr",   R8A7745_CLK_DDR,	CLK_PLL3,	    8, 1),
70 	DEF_FIXED("mp",    R8A7745_CLK_MP,	CLK_PLL1_DIV2,	   15, 1),
71 	DEF_FIXED("cpex",  R8A7745_CLK_CPEX,	CLK_EXTAL,	    2, 1),
72 	DEF_FIXED("r",     R8A7745_CLK_R,	CLK_PLL1,	49152, 1),
73 	DEF_FIXED("osc",   R8A7745_CLK_OSC,	CLK_PLL1,	12288, 1),
74 
75 	DEF_DIV6P1("sd2",  R8A7745_CLK_SD2,	CLK_PLL1_DIV2,	0x078),
76 	DEF_DIV6P1("sd3",  R8A7745_CLK_SD3,	CLK_PLL1_DIV2,	0x26c),
77 	DEF_DIV6P1("mmc0", R8A7745_CLK_MMC0,	CLK_PLL1_DIV2,	0x240),
78 };
79 
80 static const struct mssr_mod_clk r8a7745_mod_clks[] __initconst = {
81 	DEF_MOD("msiof0",		   0,	R8A7745_CLK_MP),
82 	DEF_MOD("vcp0",			 101,	R8A7745_CLK_ZS),
83 	DEF_MOD("vpc0",			 103,	R8A7745_CLK_ZS),
84 	DEF_MOD("tmu1",			 111,	R8A7745_CLK_P),
85 	DEF_MOD("3dg",			 112,	R8A7745_CLK_ZG),
86 	DEF_MOD("2d-dmac",		 115,	R8A7745_CLK_ZS),
87 	DEF_MOD("fdp1-0",		 119,	R8A7745_CLK_ZS),
88 	DEF_MOD("tmu3",			 121,	R8A7745_CLK_P),
89 	DEF_MOD("tmu2",			 122,	R8A7745_CLK_P),
90 	DEF_MOD("cmt0",			 124,	R8A7745_CLK_R),
91 	DEF_MOD("tmu0",			 125,	R8A7745_CLK_CP),
92 	DEF_MOD("vsp1du0",		 128,	R8A7745_CLK_ZS),
93 	DEF_MOD("vsps",			 131,	R8A7745_CLK_ZS),
94 	DEF_MOD("scifa2",		 202,	R8A7745_CLK_MP),
95 	DEF_MOD("scifa1",		 203,	R8A7745_CLK_MP),
96 	DEF_MOD("scifa0",		 204,	R8A7745_CLK_MP),
97 	DEF_MOD("msiof2",		 205,	R8A7745_CLK_MP),
98 	DEF_MOD("scifb0",		 206,	R8A7745_CLK_MP),
99 	DEF_MOD("scifb1",		 207,	R8A7745_CLK_MP),
100 	DEF_MOD("msiof1",		 208,	R8A7745_CLK_MP),
101 	DEF_MOD("scifb2",		 216,	R8A7745_CLK_MP),
102 	DEF_MOD("sys-dmac1",		 218,	R8A7745_CLK_ZS),
103 	DEF_MOD("sys-dmac0",		 219,	R8A7745_CLK_ZS),
104 	DEF_MOD("tpu0",			 304,	R8A7745_CLK_CP),
105 	DEF_MOD("sdhi3",		 311,	R8A7745_CLK_SD3),
106 	DEF_MOD("sdhi2",		 312,	R8A7745_CLK_SD2),
107 	DEF_MOD("sdhi0",		 314,	R8A7745_CLK_SD0),
108 	DEF_MOD("mmcif0",		 315,	R8A7745_CLK_MMC0),
109 	DEF_MOD("iic0",			 318,	R8A7745_CLK_HP),
110 	DEF_MOD("iic1",			 323,	R8A7745_CLK_HP),
111 	DEF_MOD("cmt1",			 329,	R8A7745_CLK_R),
112 	DEF_MOD("usbhs-dmac0",		 330,	R8A7745_CLK_HP),
113 	DEF_MOD("usbhs-dmac1",		 331,	R8A7745_CLK_HP),
114 	DEF_MOD("rwdt",			 402,	R8A7745_CLK_R),
115 	DEF_MOD("irqc",			 407,	R8A7745_CLK_CP),
116 	DEF_MOD("intc-sys",		 408,	R8A7745_CLK_ZS),
117 	DEF_MOD("audio-dmac0",		 502,	R8A7745_CLK_HP),
118 	DEF_MOD("pwm",			 523,	R8A7745_CLK_P),
119 	DEF_MOD("usb-ehci",		 703,	R8A7745_CLK_MP),
120 	DEF_MOD("usbhs",		 704,	R8A7745_CLK_HP),
121 	DEF_MOD("hscif2",		 713,	R8A7745_CLK_ZS),
122 	DEF_MOD("scif5",		 714,	R8A7745_CLK_P),
123 	DEF_MOD("scif4",		 715,	R8A7745_CLK_P),
124 	DEF_MOD("hscif1",		 716,	R8A7745_CLK_ZS),
125 	DEF_MOD("hscif0",		 717,	R8A7745_CLK_ZS),
126 	DEF_MOD("scif3",		 718,	R8A7745_CLK_P),
127 	DEF_MOD("scif2",		 719,	R8A7745_CLK_P),
128 	DEF_MOD("scif1",		 720,	R8A7745_CLK_P),
129 	DEF_MOD("scif0",		 721,	R8A7745_CLK_P),
130 	DEF_MOD("du1",			 723,	R8A7745_CLK_ZX),
131 	DEF_MOD("du0",			 724,	R8A7745_CLK_ZX),
132 	DEF_MOD("ipmmu-sgx",		 800,	R8A7745_CLK_ZX),
133 	DEF_MOD("vin1",			 810,	R8A7745_CLK_ZG),
134 	DEF_MOD("vin0",			 811,	R8A7745_CLK_ZG),
135 	DEF_MOD("etheravb",		 812,	R8A7745_CLK_HP),
136 	DEF_MOD("ether",		 813,	R8A7745_CLK_P),
137 	DEF_MOD("gpio6",		 905,	R8A7745_CLK_CP),
138 	DEF_MOD("gpio5",		 907,	R8A7745_CLK_CP),
139 	DEF_MOD("gpio4",		 908,	R8A7745_CLK_CP),
140 	DEF_MOD("gpio3",		 909,	R8A7745_CLK_CP),
141 	DEF_MOD("gpio2",		 910,	R8A7745_CLK_CP),
142 	DEF_MOD("gpio1",		 911,	R8A7745_CLK_CP),
143 	DEF_MOD("gpio0",		 912,	R8A7745_CLK_CP),
144 	DEF_MOD("can1",			 915,	R8A7745_CLK_P),
145 	DEF_MOD("can0",			 916,	R8A7745_CLK_P),
146 	DEF_MOD("qspi_mod",		 917,	R8A7745_CLK_QSPI),
147 	DEF_MOD("i2c5",			 925,	R8A7745_CLK_HP),
148 	DEF_MOD("i2c4",			 927,	R8A7745_CLK_HP),
149 	DEF_MOD("i2c3",			 928,	R8A7745_CLK_HP),
150 	DEF_MOD("i2c2",			 929,	R8A7745_CLK_HP),
151 	DEF_MOD("i2c1",			 930,	R8A7745_CLK_HP),
152 	DEF_MOD("i2c0",			 931,	R8A7745_CLK_HP),
153 	DEF_MOD("ssi-all",		1005,	R8A7745_CLK_P),
154 	DEF_MOD("ssi9",			1006,	MOD_CLK_ID(1005)),
155 	DEF_MOD("ssi8",			1007,	MOD_CLK_ID(1005)),
156 	DEF_MOD("ssi7",			1008,	MOD_CLK_ID(1005)),
157 	DEF_MOD("ssi6",			1009,	MOD_CLK_ID(1005)),
158 	DEF_MOD("ssi5",			1010,	MOD_CLK_ID(1005)),
159 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
160 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
161 	DEF_MOD("ssi2",			1013,	MOD_CLK_ID(1005)),
162 	DEF_MOD("ssi1",			1014,	MOD_CLK_ID(1005)),
163 	DEF_MOD("ssi0",			1015,	MOD_CLK_ID(1005)),
164 	DEF_MOD("scu-all",		1017,	R8A7745_CLK_P),
165 	DEF_MOD("scu-dvc1",		1018,	MOD_CLK_ID(1017)),
166 	DEF_MOD("scu-dvc0",		1019,	MOD_CLK_ID(1017)),
167 	DEF_MOD("scu-ctu1-mix1",	1020,	MOD_CLK_ID(1017)),
168 	DEF_MOD("scu-ctu0-mix0",	1021,	MOD_CLK_ID(1017)),
169 	DEF_MOD("scu-src6",		1025,	MOD_CLK_ID(1017)),
170 	DEF_MOD("scu-src5",		1026,	MOD_CLK_ID(1017)),
171 	DEF_MOD("scu-src4",		1027,	MOD_CLK_ID(1017)),
172 	DEF_MOD("scu-src3",		1028,	MOD_CLK_ID(1017)),
173 	DEF_MOD("scu-src2",		1029,	MOD_CLK_ID(1017)),
174 	DEF_MOD("scu-src1",		1030,	MOD_CLK_ID(1017)),
175 	DEF_MOD("scifa3",		1106,	R8A7745_CLK_MP),
176 	DEF_MOD("scifa4",		1107,	R8A7745_CLK_MP),
177 	DEF_MOD("scifa5",		1108,	R8A7745_CLK_MP),
178 };
179 
180 static const unsigned int r8a7745_crit_mod_clks[] __initconst = {
181 	MOD_CLK_ID(402),	/* RWDT */
182 	MOD_CLK_ID(408),	/* INTC-SYS (GIC) */
183 };
184 
185 /*
186  * CPG Clock Data
187  */
188 
189 /*
190  *    MD	EXTAL		PLL0	PLL1	PLL3
191  * 14 13 19	(MHz)		*1	*2
192  *---------------------------------------------------
193  * 0  0  1	15		x200/3	x208/2	x88
194  * 0  1  1	20		x150/3	x156/2	x66
195  * 1  0  1	26 / 2		x230/3	x240/2	x102
196  * 1  1  1	30 / 2		x200/3	x208/2	x88
197  *
198  * *1 :	Table 7.5b indicates VCO output (PLL0 = VCO/3)
199  * *2 :	Table 7.5b indicates VCO output (PLL1 = VCO/2)
200  */
201 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 13) | \
202 					 (((md) & BIT(13)) >> 13))
203 
204 static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[8] __initconst = {
205 	/* EXTAL div	PLL1 mult	PLL3 mult	PLL0 mult */
206 	{ 1,		208,		88,		200	},
207 	{ 1,		156,		66,		150	},
208 	{ 2,		240,		102,		230	},
209 	{ 2,		208,		88,		200	},
210 };
211 
r8a7745_cpg_mssr_init(struct device * dev)212 static int __init r8a7745_cpg_mssr_init(struct device *dev)
213 {
214 	const struct rcar_gen2_cpg_pll_config *cpg_pll_config;
215 	u32 cpg_mode;
216 	int error;
217 
218 	error = rcar_rst_read_mode_pins(&cpg_mode);
219 	if (error)
220 		return error;
221 
222 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
223 
224 	return rcar_gen2_cpg_init(cpg_pll_config, 3, cpg_mode);
225 }
226 
227 const struct cpg_mssr_info r8a7745_cpg_mssr_info __initconst = {
228 	/* Core Clocks */
229 	.core_clks = r8a7745_core_clks,
230 	.num_core_clks = ARRAY_SIZE(r8a7745_core_clks),
231 	.last_dt_core_clk = LAST_DT_CORE_CLK,
232 	.num_total_core_clks = MOD_CLK_BASE,
233 
234 	/* Module Clocks */
235 	.mod_clks = r8a7745_mod_clks,
236 	.num_mod_clks = ARRAY_SIZE(r8a7745_mod_clks),
237 	.num_hw_mod_clks = 12 * 32,
238 
239 	/* Critical Module Clocks */
240 	.crit_mod_clks = r8a7745_crit_mod_clks,
241 	.num_crit_mod_clks = ARRAY_SIZE(r8a7745_crit_mod_clks),
242 
243 	/* Callbacks */
244 	.init = r8a7745_cpg_mssr_init,
245 	.cpg_clk_register = rcar_gen2_cpg_clk_register,
246 };
247