1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a779a0 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2020 Renesas Electronics Corp.
6  *
7  * Based on r8a7795-cpg-mssr.c
8  *
9  * Copyright (C) 2015 Glider bvba
10  * Copyright (C) 2015 Renesas Electronics Corp.
11  */
12 
13 #include <linux/bitfield.h>
14 #include <linux/clk.h>
15 #include <linux/clk-provider.h>
16 #include <linux/device.h>
17 #include <linux/err.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/soc/renesas/rcar-rst.h>
21 
22 #include <dt-bindings/clock/r8a779a0-cpg-mssr.h>
23 
24 #include "renesas-cpg-mssr.h"
25 #include "rcar-gen4-cpg.h"
26 
27 enum clk_ids {
28 	/* Core Clock Outputs exported to DT */
29 	LAST_DT_CORE_CLK = R8A779A0_CLK_OSC,
30 
31 	/* External Input Clocks */
32 	CLK_EXTAL,
33 	CLK_EXTALR,
34 
35 	/* Internal Core Clocks */
36 	CLK_MAIN,
37 	CLK_PLL1,
38 	CLK_PLL20,
39 	CLK_PLL21,
40 	CLK_PLL30,
41 	CLK_PLL31,
42 	CLK_PLL5,
43 	CLK_PLL1_DIV2,
44 	CLK_PLL20_DIV2,
45 	CLK_PLL21_DIV2,
46 	CLK_PLL30_DIV2,
47 	CLK_PLL31_DIV2,
48 	CLK_PLL5_DIV2,
49 	CLK_PLL5_DIV4,
50 	CLK_S1,
51 	CLK_S3,
52 	CLK_SDSRC,
53 	CLK_RPCSRC,
54 	CLK_OCO,
55 
56 	/* Module Clocks */
57 	MOD_CLK_BASE
58 };
59 
60 #define DEF_PLL(_name, _id, _offset)	\
61 	DEF_BASE(_name, _id, CLK_TYPE_GEN4_PLL2X_3X, CLK_MAIN, \
62 		 .offset = _offset)
63 
64 static const struct cpg_core_clk r8a779a0_core_clks[] __initconst = {
65 	/* External Clock Inputs */
66 	DEF_INPUT("extal",  CLK_EXTAL),
67 	DEF_INPUT("extalr", CLK_EXTALR),
68 
69 	/* Internal Core Clocks */
70 	DEF_BASE(".main", CLK_MAIN,	CLK_TYPE_GEN4_MAIN, CLK_EXTAL),
71 	DEF_BASE(".pll1", CLK_PLL1,	CLK_TYPE_GEN4_PLL1, CLK_MAIN),
72 	DEF_BASE(".pll5", CLK_PLL5,	CLK_TYPE_GEN4_PLL5, CLK_MAIN),
73 	DEF_PLL(".pll20", CLK_PLL20,	0x0834),
74 	DEF_PLL(".pll21", CLK_PLL21,	0x0838),
75 	DEF_PLL(".pll30", CLK_PLL30,	0x083c),
76 	DEF_PLL(".pll31", CLK_PLL31,	0x0840),
77 
78 	DEF_FIXED(".pll1_div2",		CLK_PLL1_DIV2,	CLK_PLL1,	2, 1),
79 	DEF_FIXED(".pll20_div2",	CLK_PLL20_DIV2,	CLK_PLL20,	2, 1),
80 	DEF_FIXED(".pll21_div2",	CLK_PLL21_DIV2,	CLK_PLL21,	2, 1),
81 	DEF_FIXED(".pll30_div2",	CLK_PLL30_DIV2,	CLK_PLL30,	2, 1),
82 	DEF_FIXED(".pll31_div2",	CLK_PLL31_DIV2,	CLK_PLL31,	2, 1),
83 	DEF_FIXED(".pll5_div2",		CLK_PLL5_DIV2,	CLK_PLL5,	2, 1),
84 	DEF_FIXED(".pll5_div4",		CLK_PLL5_DIV4,	CLK_PLL5_DIV2,	2, 1),
85 	DEF_FIXED(".s1",		CLK_S1,		CLK_PLL1_DIV2,	2, 1),
86 	DEF_FIXED(".s3",		CLK_S3,		CLK_PLL1_DIV2,	4, 1),
87 	DEF_FIXED(".sdsrc",		CLK_SDSRC,	CLK_PLL5_DIV4,	1, 1),
88 
89 	DEF_RATE(".oco",		CLK_OCO,	32768),
90 
91 	DEF_BASE(".rpcsrc",		CLK_RPCSRC,	CLK_TYPE_GEN4_RPCSRC, CLK_PLL5),
92 
93 	/* Core Clock Outputs */
94 	DEF_GEN4_Z("z0",	R8A779A0_CLK_Z0,	CLK_TYPE_GEN4_Z,	CLK_PLL20,	2, 0),
95 	DEF_GEN4_Z("z1",	R8A779A0_CLK_Z1,	CLK_TYPE_GEN4_Z,	CLK_PLL21,	2, 8),
96 	DEF_FIXED("zx",		R8A779A0_CLK_ZX,	CLK_PLL20_DIV2,	2, 1),
97 	DEF_FIXED("s1d1",	R8A779A0_CLK_S1D1,	CLK_S1,		1, 1),
98 	DEF_FIXED("s1d2",	R8A779A0_CLK_S1D2,	CLK_S1,		2, 1),
99 	DEF_FIXED("s1d4",	R8A779A0_CLK_S1D4,	CLK_S1,		4, 1),
100 	DEF_FIXED("s1d8",	R8A779A0_CLK_S1D8,	CLK_S1,		8, 1),
101 	DEF_FIXED("s1d12",	R8A779A0_CLK_S1D12,	CLK_S1,		12, 1),
102 	DEF_FIXED("s3d1",	R8A779A0_CLK_S3D1,	CLK_S3,		1, 1),
103 	DEF_FIXED("s3d2",	R8A779A0_CLK_S3D2,	CLK_S3,		2, 1),
104 	DEF_FIXED("s3d4",	R8A779A0_CLK_S3D4,	CLK_S3,		4, 1),
105 	DEF_FIXED("zs",		R8A779A0_CLK_ZS,	CLK_PLL1_DIV2,	4, 1),
106 	DEF_FIXED("zt",		R8A779A0_CLK_ZT,	CLK_PLL1_DIV2,	2, 1),
107 	DEF_FIXED("ztr",	R8A779A0_CLK_ZTR,	CLK_PLL1_DIV2,	2, 1),
108 	DEF_FIXED("zr",		R8A779A0_CLK_ZR,	CLK_PLL1_DIV2,	1, 1),
109 	DEF_FIXED("cnndsp",	R8A779A0_CLK_CNNDSP,	CLK_PLL5_DIV4,	1, 1),
110 	DEF_FIXED("vip",	R8A779A0_CLK_VIP,	CLK_PLL5,	5, 1),
111 	DEF_FIXED("adgh",	R8A779A0_CLK_ADGH,	CLK_PLL5_DIV4,	1, 1),
112 	DEF_FIXED("icu",	R8A779A0_CLK_ICU,	CLK_PLL5_DIV4,	2, 1),
113 	DEF_FIXED("icud2",	R8A779A0_CLK_ICUD2,	CLK_PLL5_DIV4,	4, 1),
114 	DEF_FIXED("vcbus",	R8A779A0_CLK_VCBUS,	CLK_PLL5_DIV4,	1, 1),
115 	DEF_FIXED("cbfusa",	R8A779A0_CLK_CBFUSA,	CLK_EXTAL,	2, 1),
116 	DEF_FIXED("cp",		R8A779A0_CLK_CP,	CLK_EXTAL,	2, 1),
117 	DEF_FIXED("cl16mck",	R8A779A0_CLK_CL16MCK,	CLK_PLL1_DIV2,	64, 1),
118 
119 	DEF_GEN4_SDH("sd0h",	R8A779A0_CLK_SD0H,	CLK_SDSRC,	   0x870),
120 	DEF_GEN4_SD("sd0",	R8A779A0_CLK_SD0,	R8A779A0_CLK_SD0H, 0x870),
121 
122 	DEF_BASE("rpc",		R8A779A0_CLK_RPC, CLK_TYPE_GEN4_RPC, CLK_RPCSRC),
123 	DEF_BASE("rpcd2",	R8A779A0_CLK_RPCD2, CLK_TYPE_GEN4_RPCD2,
124 		 R8A779A0_CLK_RPC),
125 
126 	DEF_DIV6P1("mso",	R8A779A0_CLK_MSO,	CLK_PLL5_DIV4,	0x87c),
127 	DEF_DIV6P1("canfd",	R8A779A0_CLK_CANFD,	CLK_PLL5_DIV4,	0x878),
128 	DEF_DIV6P1("csi0",	R8A779A0_CLK_CSI0,	CLK_PLL5_DIV4,	0x880),
129 	DEF_DIV6P1("dsi",	R8A779A0_CLK_DSI,	CLK_PLL5_DIV4,	0x884),
130 
131 	DEF_GEN4_OSC("osc",	R8A779A0_CLK_OSC,	CLK_EXTAL,	8),
132 	DEF_GEN4_MDSEL("r",	R8A779A0_CLK_R, 29, CLK_EXTALR, 1, CLK_OCO, 1),
133 };
134 
135 static const struct mssr_mod_clk r8a779a0_mod_clks[] __initconst = {
136 	DEF_MOD("avb0",		211,	R8A779A0_CLK_S3D2),
137 	DEF_MOD("avb1",		212,	R8A779A0_CLK_S3D2),
138 	DEF_MOD("avb2",		213,	R8A779A0_CLK_S3D2),
139 	DEF_MOD("avb3",		214,	R8A779A0_CLK_S3D2),
140 	DEF_MOD("avb4",		215,	R8A779A0_CLK_S3D2),
141 	DEF_MOD("avb5",		216,	R8A779A0_CLK_S3D2),
142 	DEF_MOD("canfd0",	328,	R8A779A0_CLK_CANFD),
143 	DEF_MOD("csi40",	331,	R8A779A0_CLK_CSI0),
144 	DEF_MOD("csi41",	400,	R8A779A0_CLK_CSI0),
145 	DEF_MOD("csi42",	401,	R8A779A0_CLK_CSI0),
146 	DEF_MOD("csi43",	402,	R8A779A0_CLK_CSI0),
147 	DEF_MOD("du",		411,	R8A779A0_CLK_S3D1),
148 	DEF_MOD("dsi0",		415,	R8A779A0_CLK_DSI),
149 	DEF_MOD("dsi1",		416,	R8A779A0_CLK_DSI),
150 	DEF_MOD("fcpvd0",	508,	R8A779A0_CLK_S3D1),
151 	DEF_MOD("fcpvd1",	509,	R8A779A0_CLK_S3D1),
152 	DEF_MOD("hscif0",	514,	R8A779A0_CLK_S1D2),
153 	DEF_MOD("hscif1",	515,	R8A779A0_CLK_S1D2),
154 	DEF_MOD("hscif2",	516,	R8A779A0_CLK_S1D2),
155 	DEF_MOD("hscif3",	517,	R8A779A0_CLK_S1D2),
156 	DEF_MOD("i2c0",		518,	R8A779A0_CLK_S1D4),
157 	DEF_MOD("i2c1",		519,	R8A779A0_CLK_S1D4),
158 	DEF_MOD("i2c2",		520,	R8A779A0_CLK_S1D4),
159 	DEF_MOD("i2c3",		521,	R8A779A0_CLK_S1D4),
160 	DEF_MOD("i2c4",		522,	R8A779A0_CLK_S1D4),
161 	DEF_MOD("i2c5",		523,	R8A779A0_CLK_S1D4),
162 	DEF_MOD("i2c6",		524,	R8A779A0_CLK_S1D4),
163 	DEF_MOD("ispcs0",	612,	R8A779A0_CLK_S1D1),
164 	DEF_MOD("ispcs1",	613,	R8A779A0_CLK_S1D1),
165 	DEF_MOD("ispcs2",	614,	R8A779A0_CLK_S1D1),
166 	DEF_MOD("ispcs3",	615,	R8A779A0_CLK_S1D1),
167 	DEF_MOD("msi0",		618,	R8A779A0_CLK_MSO),
168 	DEF_MOD("msi1",		619,	R8A779A0_CLK_MSO),
169 	DEF_MOD("msi2",		620,	R8A779A0_CLK_MSO),
170 	DEF_MOD("msi3",		621,	R8A779A0_CLK_MSO),
171 	DEF_MOD("msi4",		622,	R8A779A0_CLK_MSO),
172 	DEF_MOD("msi5",		623,	R8A779A0_CLK_MSO),
173 	DEF_MOD("pwm0",		628,	R8A779A0_CLK_S1D8),
174 	DEF_MOD("rpc-if",	629,	R8A779A0_CLK_RPCD2),
175 	DEF_MOD("scif0",	702,	R8A779A0_CLK_S1D8),
176 	DEF_MOD("scif1",	703,	R8A779A0_CLK_S1D8),
177 	DEF_MOD("scif3",	704,	R8A779A0_CLK_S1D8),
178 	DEF_MOD("scif4",	705,	R8A779A0_CLK_S1D8),
179 	DEF_MOD("sdhi0",	706,	R8A779A0_CLK_SD0),
180 	DEF_MOD("sys-dmac1",	709,	R8A779A0_CLK_S1D2),
181 	DEF_MOD("sys-dmac2",	710,	R8A779A0_CLK_S1D2),
182 	DEF_MOD("tmu0",		713,	R8A779A0_CLK_CL16MCK),
183 	DEF_MOD("tmu1",		714,	R8A779A0_CLK_S1D4),
184 	DEF_MOD("tmu2",		715,	R8A779A0_CLK_S1D4),
185 	DEF_MOD("tmu3",		716,	R8A779A0_CLK_S1D4),
186 	DEF_MOD("tmu4",		717,	R8A779A0_CLK_S1D4),
187 	DEF_MOD("tpu0",		718,	R8A779A0_CLK_S1D8),
188 	DEF_MOD("vin00",	730,	R8A779A0_CLK_S1D1),
189 	DEF_MOD("vin01",	731,	R8A779A0_CLK_S1D1),
190 	DEF_MOD("vin02",	800,	R8A779A0_CLK_S1D1),
191 	DEF_MOD("vin03",	801,	R8A779A0_CLK_S1D1),
192 	DEF_MOD("vin04",	802,	R8A779A0_CLK_S1D1),
193 	DEF_MOD("vin05",	803,	R8A779A0_CLK_S1D1),
194 	DEF_MOD("vin06",	804,	R8A779A0_CLK_S1D1),
195 	DEF_MOD("vin07",	805,	R8A779A0_CLK_S1D1),
196 	DEF_MOD("vin10",	806,	R8A779A0_CLK_S1D1),
197 	DEF_MOD("vin11",	807,	R8A779A0_CLK_S1D1),
198 	DEF_MOD("vin12",	808,	R8A779A0_CLK_S1D1),
199 	DEF_MOD("vin13",	809,	R8A779A0_CLK_S1D1),
200 	DEF_MOD("vin14",	810,	R8A779A0_CLK_S1D1),
201 	DEF_MOD("vin15",	811,	R8A779A0_CLK_S1D1),
202 	DEF_MOD("vin16",	812,	R8A779A0_CLK_S1D1),
203 	DEF_MOD("vin17",	813,	R8A779A0_CLK_S1D1),
204 	DEF_MOD("vin20",	814,	R8A779A0_CLK_S1D1),
205 	DEF_MOD("vin21",	815,	R8A779A0_CLK_S1D1),
206 	DEF_MOD("vin22",	816,	R8A779A0_CLK_S1D1),
207 	DEF_MOD("vin23",	817,	R8A779A0_CLK_S1D1),
208 	DEF_MOD("vin24",	818,	R8A779A0_CLK_S1D1),
209 	DEF_MOD("vin25",	819,	R8A779A0_CLK_S1D1),
210 	DEF_MOD("vin26",	820,	R8A779A0_CLK_S1D1),
211 	DEF_MOD("vin27",	821,	R8A779A0_CLK_S1D1),
212 	DEF_MOD("vin30",	822,	R8A779A0_CLK_S1D1),
213 	DEF_MOD("vin31",	823,	R8A779A0_CLK_S1D1),
214 	DEF_MOD("vin32",	824,	R8A779A0_CLK_S1D1),
215 	DEF_MOD("vin33",	825,	R8A779A0_CLK_S1D1),
216 	DEF_MOD("vin34",	826,	R8A779A0_CLK_S1D1),
217 	DEF_MOD("vin35",	827,	R8A779A0_CLK_S1D1),
218 	DEF_MOD("vin36",	828,	R8A779A0_CLK_S1D1),
219 	DEF_MOD("vin37",	829,	R8A779A0_CLK_S1D1),
220 	DEF_MOD("vspd0",	830,	R8A779A0_CLK_S3D1),
221 	DEF_MOD("vspd1",	831,	R8A779A0_CLK_S3D1),
222 	DEF_MOD("rwdt",		907,	R8A779A0_CLK_R),
223 	DEF_MOD("cmt0",		910,	R8A779A0_CLK_R),
224 	DEF_MOD("cmt1",		911,	R8A779A0_CLK_R),
225 	DEF_MOD("cmt2",		912,	R8A779A0_CLK_R),
226 	DEF_MOD("cmt3",		913,	R8A779A0_CLK_R),
227 	DEF_MOD("pfc0",		915,	R8A779A0_CLK_CP),
228 	DEF_MOD("pfc1",		916,	R8A779A0_CLK_CP),
229 	DEF_MOD("pfc2",		917,	R8A779A0_CLK_CP),
230 	DEF_MOD("pfc3",		918,	R8A779A0_CLK_CP),
231 	DEF_MOD("tsc",		919,	R8A779A0_CLK_CL16MCK),
232 	DEF_MOD("vspx0",	1028,	R8A779A0_CLK_S1D1),
233 	DEF_MOD("vspx1",	1029,	R8A779A0_CLK_S1D1),
234 	DEF_MOD("vspx2",	1030,	R8A779A0_CLK_S1D1),
235 	DEF_MOD("vspx3",	1031,	R8A779A0_CLK_S1D1),
236 };
237 
238 static const unsigned int r8a779a0_crit_mod_clks[] __initconst = {
239 	MOD_CLK_ID(907),	/* RWDT */
240 };
241 
242 /*
243  * CPG Clock Data
244  */
245 /*
246  *   MD	 EXTAL		PLL1	PLL20	PLL30	PLL4	PLL5	OSC
247  * 14 13 (MHz)			   21	   31
248  * ----------------------------------------------------------------
249  * 0  0	 16.66 x 1	x128	x216	x128	x144	x192	/16
250  * 0  1	 20    x 1	x106	x180	x106	x120	x160	/19
251  * 1  0	 Prohibited setting
252  * 1  1	 33.33 / 2	x128	x216	x128	x144	x192	/32
253  */
254 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 13) | \
255 					 (((md) & BIT(13)) >> 13))
256 static const struct rcar_gen4_cpg_pll_config cpg_pll_configs[4] = {
257 	/* EXTAL div	PLL1 mult/div	PLL2 mult/div	PLL3 mult/div	PLL4 mult/div	PLL5 mult/div	PLL6 mult/div	OSC prediv */
258 	{ 1,		128,	1,	0,	0,	0,	0,	144,	1,	192,	1,	0,	0,	16,	},
259 	{ 1,		106,	1,	0,	0,	0,	0,	120,	1,	160,	1,	0,	0,	19,	},
260 	{ 0,		0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	0,	},
261 	{ 2,		128,	1,	0,	0,	0,	0,	144,	1,	192,	1,	0,	0,	32,	},
262 };
263 
264 
265 static int __init r8a779a0_cpg_mssr_init(struct device *dev)
266 {
267 	const struct rcar_gen4_cpg_pll_config *cpg_pll_config;
268 	u32 cpg_mode;
269 	int error;
270 
271 	error = rcar_rst_read_mode_pins(&cpg_mode);
272 	if (error)
273 		return error;
274 
275 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
276 
277 	return rcar_gen4_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
278 }
279 
280 const struct cpg_mssr_info r8a779a0_cpg_mssr_info __initconst = {
281 	/* Core Clocks */
282 	.core_clks = r8a779a0_core_clks,
283 	.num_core_clks = ARRAY_SIZE(r8a779a0_core_clks),
284 	.last_dt_core_clk = LAST_DT_CORE_CLK,
285 	.num_total_core_clks = MOD_CLK_BASE,
286 
287 	/* Module Clocks */
288 	.mod_clks = r8a779a0_mod_clks,
289 	.num_mod_clks = ARRAY_SIZE(r8a779a0_mod_clks),
290 	.num_hw_mod_clks = 15 * 32,
291 
292 	/* Critical Module Clocks */
293 	.crit_mod_clks		= r8a779a0_crit_mod_clks,
294 	.num_crit_mod_clks	= ARRAY_SIZE(r8a779a0_crit_mod_clks),
295 
296 	/* Callbacks */
297 	.init = r8a779a0_cpg_mssr_init,
298 	.cpg_clk_register = rcar_gen4_cpg_clk_register,
299 
300 	.reg_layout = CLK_REG_LAYOUT_RCAR_GEN4,
301 };
302