1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a77980 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2018 Renesas Electronics Corp.
6  * Copyright (C) 2018 Cogent Embedded, Inc.
7  *
8  * Based on r8a7795-cpg-mssr.c
9  *
10  * Copyright (C) 2015 Glider bvba
11  */
12 
13 #include <linux/device.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/soc/renesas/rcar-rst.h>
17 #include <linux/sys_soc.h>
18 
19 #include <dt-bindings/clock/r8a77980-cpg-mssr.h>
20 
21 #include "renesas-cpg-mssr.h"
22 #include "rcar-gen3-cpg.h"
23 
24 enum clk_ids {
25 	/* Core Clock Outputs exported to DT */
26 	LAST_DT_CORE_CLK = R8A77980_CLK_OSC,
27 
28 	/* External Input Clocks */
29 	CLK_EXTAL,
30 	CLK_EXTALR,
31 
32 	/* Internal Core Clocks */
33 	CLK_MAIN,
34 	CLK_PLL1,
35 	CLK_PLL2,
36 	CLK_PLL3,
37 	CLK_PLL1_DIV2,
38 	CLK_PLL1_DIV4,
39 	CLK_S0,
40 	CLK_S1,
41 	CLK_S2,
42 	CLK_S3,
43 	CLK_SDSRC,
44 	CLK_RPCSRC,
45 	CLK_OCO,
46 
47 	/* Module Clocks */
48 	MOD_CLK_BASE
49 };
50 
51 static const struct cpg_core_clk r8a77980_core_clks[] __initconst = {
52 	/* External Clock Inputs */
53 	DEF_INPUT("extal",  CLK_EXTAL),
54 	DEF_INPUT("extalr", CLK_EXTALR),
55 
56 	/* Internal Core Clocks */
57 	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
58 	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
59 	DEF_BASE(".pll2",       CLK_PLL2, CLK_TYPE_GEN3_PLL2, CLK_MAIN),
60 	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
61 
62 	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,	   CLK_PLL1,       2, 1),
63 	DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,	   CLK_PLL1_DIV2,  2, 1),
64 	DEF_FIXED(".s0",	CLK_S0,		   CLK_PLL1_DIV2,  2, 1),
65 	DEF_FIXED(".s1",	CLK_S1,		   CLK_PLL1_DIV2,  3, 1),
66 	DEF_FIXED(".s2",	CLK_S2,		   CLK_PLL1_DIV2,  4, 1),
67 	DEF_FIXED(".s3",	CLK_S3,		   CLK_PLL1_DIV2,  6, 1),
68 	DEF_FIXED(".sdsrc",	CLK_SDSRC,	   CLK_PLL1_DIV2,  2, 1),
69 
70 	DEF_BASE(".rpcsrc",	CLK_RPCSRC, CLK_TYPE_GEN3_RPCSRC, CLK_PLL1),
71 
72 	DEF_RATE(".oco",	CLK_OCO,           32768),
73 
74 	/* Core Clock Outputs */
75 	DEF_FIXED("ztr",	R8A77980_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
76 	DEF_FIXED("ztrd2",	R8A77980_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
77 	DEF_FIXED("zt",		R8A77980_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
78 	DEF_FIXED("zx",		R8A77980_CLK_ZX,    CLK_PLL1_DIV2,  2, 1),
79 	DEF_FIXED("s0d1",	R8A77980_CLK_S0D1,  CLK_S0,         1, 1),
80 	DEF_FIXED("s0d2",	R8A77980_CLK_S0D2,  CLK_S0,         2, 1),
81 	DEF_FIXED("s0d3",	R8A77980_CLK_S0D3,  CLK_S0,         3, 1),
82 	DEF_FIXED("s0d4",	R8A77980_CLK_S0D4,  CLK_S0,         4, 1),
83 	DEF_FIXED("s0d6",	R8A77980_CLK_S0D6,  CLK_S0,         6, 1),
84 	DEF_FIXED("s0d12",	R8A77980_CLK_S0D12, CLK_S0,        12, 1),
85 	DEF_FIXED("s0d24",	R8A77980_CLK_S0D24, CLK_S0,        24, 1),
86 	DEF_FIXED("s1d1",	R8A77980_CLK_S1D1,  CLK_S1,         1, 1),
87 	DEF_FIXED("s1d2",	R8A77980_CLK_S1D2,  CLK_S1,         2, 1),
88 	DEF_FIXED("s1d4",	R8A77980_CLK_S1D4,  CLK_S1,         4, 1),
89 	DEF_FIXED("s2d1",	R8A77980_CLK_S2D1,  CLK_S2,         1, 1),
90 	DEF_FIXED("s2d2",	R8A77980_CLK_S2D2,  CLK_S2,         2, 1),
91 	DEF_FIXED("s2d4",	R8A77980_CLK_S2D4,  CLK_S2,         4, 1),
92 	DEF_FIXED("s3d1",	R8A77980_CLK_S3D1,  CLK_S3,         1, 1),
93 	DEF_FIXED("s3d2",	R8A77980_CLK_S3D2,  CLK_S3,         2, 1),
94 	DEF_FIXED("s3d4",	R8A77980_CLK_S3D4,  CLK_S3,         4, 1),
95 
96 	DEF_GEN3_SDH("sd0h",	R8A77980_CLK_SD0H,  CLK_SDSRC,	       0x0074),
97 	DEF_GEN3_SD("sd0",	R8A77980_CLK_SD0,   R8A77980_CLK_SD0H, 0x0074),
98 
99 	DEF_BASE("rpc",		R8A77980_CLK_RPC,   CLK_TYPE_GEN3_RPC,   CLK_RPCSRC),
100 	DEF_BASE("rpcd2",	R8A77980_CLK_RPCD2, CLK_TYPE_GEN3_RPCD2, R8A77980_CLK_RPC),
101 
102 	DEF_FIXED("cl",		R8A77980_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
103 	DEF_FIXED("cp",		R8A77980_CLK_CP,    CLK_EXTAL,	    2, 1),
104 	DEF_FIXED("cpex",	R8A77980_CLK_CPEX,  CLK_EXTAL,	    2, 1),
105 
106 	DEF_DIV6P1("canfd",	R8A77980_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
107 	DEF_DIV6P1("csi0",	R8A77980_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
108 	DEF_DIV6P1("mso",	R8A77980_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
109 
110 	DEF_GEN3_OSC("osc",	R8A77980_CLK_OSC,   CLK_EXTAL,     8),
111 	DEF_GEN3_MDSEL("r",	R8A77980_CLK_R, 29, CLK_EXTALR, 1, CLK_OCO, 1),
112 };
113 
114 static const struct mssr_mod_clk r8a77980_mod_clks[] __initconst = {
115 	DEF_MOD("tmu4",			 121,	R8A77980_CLK_S0D6),
116 	DEF_MOD("tmu3",			 122,	R8A77980_CLK_S0D6),
117 	DEF_MOD("tmu2",			 123,	R8A77980_CLK_S0D6),
118 	DEF_MOD("tmu1",			 124,	R8A77980_CLK_S0D6),
119 	DEF_MOD("tmu0",			 125,	R8A77980_CLK_CP),
120 	DEF_MOD("scif4",		 203,	R8A77980_CLK_S3D4),
121 	DEF_MOD("scif3",		 204,	R8A77980_CLK_S3D4),
122 	DEF_MOD("scif1",		 206,	R8A77980_CLK_S3D4),
123 	DEF_MOD("scif0",		 207,	R8A77980_CLK_S3D4),
124 	DEF_MOD("msiof3",		 208,	R8A77980_CLK_MSO),
125 	DEF_MOD("msiof2",		 209,	R8A77980_CLK_MSO),
126 	DEF_MOD("msiof1",		 210,	R8A77980_CLK_MSO),
127 	DEF_MOD("msiof0",		 211,	R8A77980_CLK_MSO),
128 	DEF_MOD("sys-dmac2",		 217,	R8A77980_CLK_S0D3),
129 	DEF_MOD("sys-dmac1",		 218,	R8A77980_CLK_S0D3),
130 	DEF_MOD("cmt3",			 300,	R8A77980_CLK_R),
131 	DEF_MOD("cmt2",			 301,	R8A77980_CLK_R),
132 	DEF_MOD("cmt1",			 302,	R8A77980_CLK_R),
133 	DEF_MOD("cmt0",			 303,	R8A77980_CLK_R),
134 	DEF_MOD("tpu0",			 304,	R8A77980_CLK_S3D4),
135 	DEF_MOD("sdif",			 314,	R8A77980_CLK_SD0),
136 	DEF_MOD("pciec0",		 319,	R8A77980_CLK_S2D2),
137 	DEF_MOD("rwdt",			 402,	R8A77980_CLK_R),
138 	DEF_MOD("intc-ex",		 407,	R8A77980_CLK_CP),
139 	DEF_MOD("intc-ap",		 408,	R8A77980_CLK_S0D3),
140 	DEF_MOD("hscif3",		 517,	R8A77980_CLK_S3D1),
141 	DEF_MOD("hscif2",		 518,	R8A77980_CLK_S3D1),
142 	DEF_MOD("hscif1",		 519,	R8A77980_CLK_S3D1),
143 	DEF_MOD("hscif0",		 520,	R8A77980_CLK_S3D1),
144 	DEF_MOD("imp4",			 521,	R8A77980_CLK_S1D1),
145 	DEF_MOD("thermal",		 522,	R8A77980_CLK_CP),
146 	DEF_MOD("pwm",			 523,	R8A77980_CLK_S0D12),
147 	DEF_MOD("impdma1",		 526,	R8A77980_CLK_S1D1),
148 	DEF_MOD("impdma0",		 527,	R8A77980_CLK_S1D1),
149 	DEF_MOD("imp-ocv4",		 528,	R8A77980_CLK_S1D1),
150 	DEF_MOD("imp-ocv3",		 529,	R8A77980_CLK_S1D1),
151 	DEF_MOD("imp-ocv2",		 531,	R8A77980_CLK_S1D1),
152 	DEF_MOD("fcpvd0",		 603,	R8A77980_CLK_S3D1),
153 	DEF_MOD("vspd0",		 623,	R8A77980_CLK_S3D1),
154 	DEF_MOD("csi41",		 715,	R8A77980_CLK_CSI0),
155 	DEF_MOD("csi40",		 716,	R8A77980_CLK_CSI0),
156 	DEF_MOD("du0",			 724,	R8A77980_CLK_S2D1),
157 	DEF_MOD("lvds",			 727,	R8A77980_CLK_S2D1),
158 	DEF_MOD("etheravb",		 812,	R8A77980_CLK_S3D2),
159 	DEF_MOD("gether",		 813,	R8A77980_CLK_S3D2),
160 	DEF_MOD("imp3",			 824,	R8A77980_CLK_S1D1),
161 	DEF_MOD("imp2",			 825,	R8A77980_CLK_S1D1),
162 	DEF_MOD("imp1",			 826,	R8A77980_CLK_S1D1),
163 	DEF_MOD("imp0",			 827,	R8A77980_CLK_S1D1),
164 	DEF_MOD("imp-ocv1",		 828,	R8A77980_CLK_S1D1),
165 	DEF_MOD("imp-ocv0",		 829,	R8A77980_CLK_S1D1),
166 	DEF_MOD("impram",		 830,	R8A77980_CLK_S1D1),
167 	DEF_MOD("impcnn",		 831,	R8A77980_CLK_S1D1),
168 	DEF_MOD("gpio5",		 907,	R8A77980_CLK_CP),
169 	DEF_MOD("gpio4",		 908,	R8A77980_CLK_CP),
170 	DEF_MOD("gpio3",		 909,	R8A77980_CLK_CP),
171 	DEF_MOD("gpio2",		 910,	R8A77980_CLK_CP),
172 	DEF_MOD("gpio1",		 911,	R8A77980_CLK_CP),
173 	DEF_MOD("gpio0",		 912,	R8A77980_CLK_CP),
174 	DEF_MOD("can-fd",		 914,	R8A77980_CLK_S3D2),
175 	DEF_MOD("rpc-if",		 917,	R8A77980_CLK_RPCD2),
176 	DEF_MOD("i2c4",			 927,	R8A77980_CLK_S0D6),
177 	DEF_MOD("i2c3",			 928,	R8A77980_CLK_S0D6),
178 	DEF_MOD("i2c2",			 929,	R8A77980_CLK_S3D2),
179 	DEF_MOD("i2c1",			 930,	R8A77980_CLK_S3D2),
180 	DEF_MOD("i2c0",			 931,	R8A77980_CLK_S3D2),
181 };
182 
183 static const unsigned int r8a77980_crit_mod_clks[] __initconst = {
184 	MOD_CLK_ID(402),	/* RWDT */
185 	MOD_CLK_ID(408),	/* INTC-AP (GIC) */
186 };
187 
188 /*
189  * CPG Clock Data
190  */
191 
192 /*
193  *   MD		EXTAL		PLL2	PLL1	PLL3	OSC
194  * 14 13	(MHz)
195  * --------------------------------------------------------
196  * 0  0		16.66 x 1	x240	x192	x192	/16
197  * 0  1		20    x 1	x200	x160	x160	/19
198  * 1  0		27    x 1	x148	x118	x118	/26
199  * 1  1		33.33 / 2	x240	x192	x192	/32
200  */
201 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 13) | \
202 					 (((md) & BIT(13)) >> 13))
203 
204 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[4] __initconst = {
205 	/* EXTAL div	PLL1 mult/div	PLL3 mult/div	OSC prediv */
206 	{ 1,		192,	1,	192,	1,	16,	},
207 	{ 1,		160,	1,	160,	1,	19,	},
208 	{ 1,		118,	1,	118,	1,	26,	},
209 	{ 2,		192,	1,	192,	1,	32,	},
210 };
211 
212 static int __init r8a77980_cpg_mssr_init(struct device *dev)
213 {
214 	const struct rcar_gen3_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_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
225 }
226 
227 const struct cpg_mssr_info r8a77980_cpg_mssr_info __initconst = {
228 	/* Core Clocks */
229 	.core_clks = r8a77980_core_clks,
230 	.num_core_clks = ARRAY_SIZE(r8a77980_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 = r8a77980_mod_clks,
236 	.num_mod_clks = ARRAY_SIZE(r8a77980_mod_clks),
237 	.num_hw_mod_clks = 12 * 32,
238 
239 	/* Critical Module Clocks */
240 	.crit_mod_clks = r8a77980_crit_mod_clks,
241 	.num_crit_mod_clks = ARRAY_SIZE(r8a77980_crit_mod_clks),
242 
243 	/* Callbacks */
244 	.init = r8a77980_cpg_mssr_init,
245 	.cpg_clk_register = rcar_gen3_cpg_clk_register,
246 };
247