1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a7796 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2016 Glider bvba
6  * Copyright (C) 2018 Renesas Electronics Corp.
7  *
8  * Based on r8a7795-cpg-mssr.c
9  *
10  * Copyright (C) 2015 Glider bvba
11  * Copyright (C) 2015 Renesas Electronics Corp.
12  */
13 
14 #include <linux/device.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/soc/renesas/rcar-rst.h>
18 
19 #include <dt-bindings/clock/r8a7796-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 = R8A7796_CLK_OSC,
27 
28 	/* External Input Clocks */
29 	CLK_EXTAL,
30 	CLK_EXTALR,
31 
32 	/* Internal Core Clocks */
33 	CLK_MAIN,
34 	CLK_PLL0,
35 	CLK_PLL1,
36 	CLK_PLL2,
37 	CLK_PLL3,
38 	CLK_PLL4,
39 	CLK_PLL1_DIV2,
40 	CLK_PLL1_DIV4,
41 	CLK_S0,
42 	CLK_S1,
43 	CLK_S2,
44 	CLK_S3,
45 	CLK_SDSRC,
46 	CLK_SSPSRC,
47 	CLK_RINT,
48 
49 	/* Module Clocks */
50 	MOD_CLK_BASE
51 };
52 
53 static const struct cpg_core_clk r8a7796_core_clks[] __initconst = {
54 	/* External Clock Inputs */
55 	DEF_INPUT("extal",      CLK_EXTAL),
56 	DEF_INPUT("extalr",     CLK_EXTALR),
57 
58 	/* Internal Core Clocks */
59 	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
60 	DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
61 	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
62 	DEF_BASE(".pll2",       CLK_PLL2, CLK_TYPE_GEN3_PLL2, CLK_MAIN),
63 	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
64 	DEF_BASE(".pll4",       CLK_PLL4, CLK_TYPE_GEN3_PLL4, CLK_MAIN),
65 
66 	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,     CLK_PLL1,       2, 1),
67 	DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,     CLK_PLL1_DIV2,  2, 1),
68 	DEF_FIXED(".s0",        CLK_S0,            CLK_PLL1_DIV2,  2, 1),
69 	DEF_FIXED(".s1",        CLK_S1,            CLK_PLL1_DIV2,  3, 1),
70 	DEF_FIXED(".s2",        CLK_S2,            CLK_PLL1_DIV2,  4, 1),
71 	DEF_FIXED(".s3",        CLK_S3,            CLK_PLL1_DIV2,  6, 1),
72 	DEF_FIXED(".sdsrc",     CLK_SDSRC,         CLK_PLL1_DIV2,  2, 1),
73 
74 	DEF_GEN3_OSC(".r",      CLK_RINT,          CLK_EXTAL,      32),
75 
76 	/* Core Clock Outputs */
77 	DEF_GEN3_Z("z",         R8A7796_CLK_Z,     CLK_TYPE_GEN3_Z,  CLK_PLL0, 2, 8),
78 	DEF_GEN3_Z("z2",        R8A7796_CLK_Z2,    CLK_TYPE_GEN3_Z,  CLK_PLL2, 2, 0),
79 	DEF_FIXED("ztr",        R8A7796_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
80 	DEF_FIXED("ztrd2",      R8A7796_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
81 	DEF_FIXED("zt",         R8A7796_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
82 	DEF_FIXED("zx",         R8A7796_CLK_ZX,    CLK_PLL1_DIV2,  2, 1),
83 	DEF_FIXED("s0d1",       R8A7796_CLK_S0D1,  CLK_S0,         1, 1),
84 	DEF_FIXED("s0d2",       R8A7796_CLK_S0D2,  CLK_S0,         2, 1),
85 	DEF_FIXED("s0d3",       R8A7796_CLK_S0D3,  CLK_S0,         3, 1),
86 	DEF_FIXED("s0d4",       R8A7796_CLK_S0D4,  CLK_S0,         4, 1),
87 	DEF_FIXED("s0d6",       R8A7796_CLK_S0D6,  CLK_S0,         6, 1),
88 	DEF_FIXED("s0d8",       R8A7796_CLK_S0D8,  CLK_S0,         8, 1),
89 	DEF_FIXED("s0d12",      R8A7796_CLK_S0D12, CLK_S0,        12, 1),
90 	DEF_FIXED("s1d1",       R8A7796_CLK_S1D1,  CLK_S1,         1, 1),
91 	DEF_FIXED("s1d2",       R8A7796_CLK_S1D2,  CLK_S1,         2, 1),
92 	DEF_FIXED("s1d4",       R8A7796_CLK_S1D4,  CLK_S1,         4, 1),
93 	DEF_FIXED("s2d1",       R8A7796_CLK_S2D1,  CLK_S2,         1, 1),
94 	DEF_FIXED("s2d2",       R8A7796_CLK_S2D2,  CLK_S2,         2, 1),
95 	DEF_FIXED("s2d4",       R8A7796_CLK_S2D4,  CLK_S2,         4, 1),
96 	DEF_FIXED("s3d1",       R8A7796_CLK_S3D1,  CLK_S3,         1, 1),
97 	DEF_FIXED("s3d2",       R8A7796_CLK_S3D2,  CLK_S3,         2, 1),
98 	DEF_FIXED("s3d4",       R8A7796_CLK_S3D4,  CLK_S3,         4, 1),
99 
100 	DEF_GEN3_SD("sd0",      R8A7796_CLK_SD0,   CLK_SDSRC,     0x074),
101 	DEF_GEN3_SD("sd1",      R8A7796_CLK_SD1,   CLK_SDSRC,     0x078),
102 	DEF_GEN3_SD("sd2",      R8A7796_CLK_SD2,   CLK_SDSRC,     0x268),
103 	DEF_GEN3_SD("sd3",      R8A7796_CLK_SD3,   CLK_SDSRC,     0x26c),
104 
105 	DEF_FIXED("cl",         R8A7796_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
106 	DEF_FIXED("cp",         R8A7796_CLK_CP,    CLK_EXTAL,      2, 1),
107 	DEF_FIXED("cpex",       R8A7796_CLK_CPEX,  CLK_EXTAL,      2, 1),
108 
109 	DEF_DIV6P1("canfd",     R8A7796_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
110 	DEF_DIV6P1("csi0",      R8A7796_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
111 	DEF_DIV6P1("mso",       R8A7796_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
112 	DEF_DIV6P1("hdmi",      R8A7796_CLK_HDMI,  CLK_PLL1_DIV4, 0x250),
113 
114 	DEF_GEN3_OSC("osc",     R8A7796_CLK_OSC,   CLK_EXTAL,     8),
115 
116 	DEF_BASE("r",           R8A7796_CLK_R,     CLK_TYPE_GEN3_R, CLK_RINT),
117 };
118 
119 static const struct mssr_mod_clk r8a7796_mod_clks[] __initconst = {
120 	DEF_MOD("fdp1-0",		 119,	R8A7796_CLK_S0D1),
121 	DEF_MOD("scif5",		 202,	R8A7796_CLK_S3D4),
122 	DEF_MOD("scif4",		 203,	R8A7796_CLK_S3D4),
123 	DEF_MOD("scif3",		 204,	R8A7796_CLK_S3D4),
124 	DEF_MOD("scif1",		 206,	R8A7796_CLK_S3D4),
125 	DEF_MOD("scif0",		 207,	R8A7796_CLK_S3D4),
126 	DEF_MOD("msiof3",		 208,	R8A7796_CLK_MSO),
127 	DEF_MOD("msiof2",		 209,	R8A7796_CLK_MSO),
128 	DEF_MOD("msiof1",		 210,	R8A7796_CLK_MSO),
129 	DEF_MOD("msiof0",		 211,	R8A7796_CLK_MSO),
130 	DEF_MOD("sys-dmac2",		 217,	R8A7796_CLK_S3D1),
131 	DEF_MOD("sys-dmac1",		 218,	R8A7796_CLK_S3D1),
132 	DEF_MOD("sys-dmac0",		 219,	R8A7796_CLK_S0D3),
133 	DEF_MOD("cmt3",			 300,	R8A7796_CLK_R),
134 	DEF_MOD("cmt2",			 301,	R8A7796_CLK_R),
135 	DEF_MOD("cmt1",			 302,	R8A7796_CLK_R),
136 	DEF_MOD("cmt0",			 303,	R8A7796_CLK_R),
137 	DEF_MOD("scif2",		 310,	R8A7796_CLK_S3D4),
138 	DEF_MOD("sdif3",		 311,	R8A7796_CLK_SD3),
139 	DEF_MOD("sdif2",		 312,	R8A7796_CLK_SD2),
140 	DEF_MOD("sdif1",		 313,	R8A7796_CLK_SD1),
141 	DEF_MOD("sdif0",		 314,	R8A7796_CLK_SD0),
142 	DEF_MOD("pcie1",		 318,	R8A7796_CLK_S3D1),
143 	DEF_MOD("pcie0",		 319,	R8A7796_CLK_S3D1),
144 	DEF_MOD("usb3-if0",		 328,	R8A7796_CLK_S3D1),
145 	DEF_MOD("usb-dmac0",		 330,	R8A7796_CLK_S3D1),
146 	DEF_MOD("usb-dmac1",		 331,	R8A7796_CLK_S3D1),
147 	DEF_MOD("rwdt",			 402,	R8A7796_CLK_R),
148 	DEF_MOD("intc-ex",		 407,	R8A7796_CLK_CP),
149 	DEF_MOD("intc-ap",		 408,	R8A7796_CLK_S0D3),
150 	DEF_MOD("audmac1",		 501,	R8A7796_CLK_S1D2),
151 	DEF_MOD("audmac0",		 502,	R8A7796_CLK_S1D2),
152 	DEF_MOD("drif31",		 508,	R8A7796_CLK_S3D2),
153 	DEF_MOD("drif30",		 509,	R8A7796_CLK_S3D2),
154 	DEF_MOD("drif21",		 510,	R8A7796_CLK_S3D2),
155 	DEF_MOD("drif20",		 511,	R8A7796_CLK_S3D2),
156 	DEF_MOD("drif11",		 512,	R8A7796_CLK_S3D2),
157 	DEF_MOD("drif10",		 513,	R8A7796_CLK_S3D2),
158 	DEF_MOD("drif01",		 514,	R8A7796_CLK_S3D2),
159 	DEF_MOD("drif00",		 515,	R8A7796_CLK_S3D2),
160 	DEF_MOD("hscif4",		 516,	R8A7796_CLK_S3D1),
161 	DEF_MOD("hscif3",		 517,	R8A7796_CLK_S3D1),
162 	DEF_MOD("hscif2",		 518,	R8A7796_CLK_S3D1),
163 	DEF_MOD("hscif1",		 519,	R8A7796_CLK_S3D1),
164 	DEF_MOD("hscif0",		 520,	R8A7796_CLK_S3D1),
165 	DEF_MOD("thermal",		 522,	R8A7796_CLK_CP),
166 	DEF_MOD("pwm",			 523,	R8A7796_CLK_S0D12),
167 	DEF_MOD("fcpvd2",		 601,	R8A7796_CLK_S0D2),
168 	DEF_MOD("fcpvd1",		 602,	R8A7796_CLK_S0D2),
169 	DEF_MOD("fcpvd0",		 603,	R8A7796_CLK_S0D2),
170 	DEF_MOD("fcpvb0",		 607,	R8A7796_CLK_S0D1),
171 	DEF_MOD("fcpvi0",		 611,	R8A7796_CLK_S0D1),
172 	DEF_MOD("fcpf0",		 615,	R8A7796_CLK_S0D1),
173 	DEF_MOD("fcpci0",		 617,	R8A7796_CLK_S0D2),
174 	DEF_MOD("fcpcs",		 619,	R8A7796_CLK_S0D2),
175 	DEF_MOD("vspd2",		 621,	R8A7796_CLK_S0D2),
176 	DEF_MOD("vspd1",		 622,	R8A7796_CLK_S0D2),
177 	DEF_MOD("vspd0",		 623,	R8A7796_CLK_S0D2),
178 	DEF_MOD("vspb",			 626,	R8A7796_CLK_S0D1),
179 	DEF_MOD("vspi0",		 631,	R8A7796_CLK_S0D1),
180 	DEF_MOD("ehci1",		 702,	R8A7796_CLK_S3D2),
181 	DEF_MOD("ehci0",		 703,	R8A7796_CLK_S3D2),
182 	DEF_MOD("hsusb",		 704,	R8A7796_CLK_S3D2),
183 	DEF_MOD("csi20",		 714,	R8A7796_CLK_CSI0),
184 	DEF_MOD("csi40",		 716,	R8A7796_CLK_CSI0),
185 	DEF_MOD("du2",			 722,	R8A7796_CLK_S2D1),
186 	DEF_MOD("du1",			 723,	R8A7796_CLK_S2D1),
187 	DEF_MOD("du0",			 724,	R8A7796_CLK_S2D1),
188 	DEF_MOD("lvds",			 727,	R8A7796_CLK_S2D1),
189 	DEF_MOD("hdmi0",		 729,	R8A7796_CLK_HDMI),
190 	DEF_MOD("vin7",			 804,	R8A7796_CLK_S0D2),
191 	DEF_MOD("vin6",			 805,	R8A7796_CLK_S0D2),
192 	DEF_MOD("vin5",			 806,	R8A7796_CLK_S0D2),
193 	DEF_MOD("vin4",			 807,	R8A7796_CLK_S0D2),
194 	DEF_MOD("vin3",			 808,	R8A7796_CLK_S0D2),
195 	DEF_MOD("vin2",			 809,	R8A7796_CLK_S0D2),
196 	DEF_MOD("vin1",			 810,	R8A7796_CLK_S0D2),
197 	DEF_MOD("vin0",			 811,	R8A7796_CLK_S0D2),
198 	DEF_MOD("etheravb",		 812,	R8A7796_CLK_S0D6),
199 	DEF_MOD("imr1",			 822,	R8A7796_CLK_S0D2),
200 	DEF_MOD("imr0",			 823,	R8A7796_CLK_S0D2),
201 	DEF_MOD("gpio7",		 905,	R8A7796_CLK_S3D4),
202 	DEF_MOD("gpio6",		 906,	R8A7796_CLK_S3D4),
203 	DEF_MOD("gpio5",		 907,	R8A7796_CLK_S3D4),
204 	DEF_MOD("gpio4",		 908,	R8A7796_CLK_S3D4),
205 	DEF_MOD("gpio3",		 909,	R8A7796_CLK_S3D4),
206 	DEF_MOD("gpio2",		 910,	R8A7796_CLK_S3D4),
207 	DEF_MOD("gpio1",		 911,	R8A7796_CLK_S3D4),
208 	DEF_MOD("gpio0",		 912,	R8A7796_CLK_S3D4),
209 	DEF_MOD("can-fd",		 914,	R8A7796_CLK_S3D2),
210 	DEF_MOD("can-if1",		 915,	R8A7796_CLK_S3D4),
211 	DEF_MOD("can-if0",		 916,	R8A7796_CLK_S3D4),
212 	DEF_MOD("i2c6",			 918,	R8A7796_CLK_S0D6),
213 	DEF_MOD("i2c5",			 919,	R8A7796_CLK_S0D6),
214 	DEF_MOD("i2c-dvfs",		 926,	R8A7796_CLK_CP),
215 	DEF_MOD("i2c4",			 927,	R8A7796_CLK_S0D6),
216 	DEF_MOD("i2c3",			 928,	R8A7796_CLK_S0D6),
217 	DEF_MOD("i2c2",			 929,	R8A7796_CLK_S3D2),
218 	DEF_MOD("i2c1",			 930,	R8A7796_CLK_S3D2),
219 	DEF_MOD("i2c0",			 931,	R8A7796_CLK_S3D2),
220 	DEF_MOD("ssi-all",		1005,	R8A7796_CLK_S3D4),
221 	DEF_MOD("ssi9",			1006,	MOD_CLK_ID(1005)),
222 	DEF_MOD("ssi8",			1007,	MOD_CLK_ID(1005)),
223 	DEF_MOD("ssi7",			1008,	MOD_CLK_ID(1005)),
224 	DEF_MOD("ssi6",			1009,	MOD_CLK_ID(1005)),
225 	DEF_MOD("ssi5",			1010,	MOD_CLK_ID(1005)),
226 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
227 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
228 	DEF_MOD("ssi2",			1013,	MOD_CLK_ID(1005)),
229 	DEF_MOD("ssi1",			1014,	MOD_CLK_ID(1005)),
230 	DEF_MOD("ssi0",			1015,	MOD_CLK_ID(1005)),
231 	DEF_MOD("scu-all",		1017,	R8A7796_CLK_S3D4),
232 	DEF_MOD("scu-dvc1",		1018,	MOD_CLK_ID(1017)),
233 	DEF_MOD("scu-dvc0",		1019,	MOD_CLK_ID(1017)),
234 	DEF_MOD("scu-ctu1-mix1",	1020,	MOD_CLK_ID(1017)),
235 	DEF_MOD("scu-ctu0-mix0",	1021,	MOD_CLK_ID(1017)),
236 	DEF_MOD("scu-src9",		1022,	MOD_CLK_ID(1017)),
237 	DEF_MOD("scu-src8",		1023,	MOD_CLK_ID(1017)),
238 	DEF_MOD("scu-src7",		1024,	MOD_CLK_ID(1017)),
239 	DEF_MOD("scu-src6",		1025,	MOD_CLK_ID(1017)),
240 	DEF_MOD("scu-src5",		1026,	MOD_CLK_ID(1017)),
241 	DEF_MOD("scu-src4",		1027,	MOD_CLK_ID(1017)),
242 	DEF_MOD("scu-src3",		1028,	MOD_CLK_ID(1017)),
243 	DEF_MOD("scu-src2",		1029,	MOD_CLK_ID(1017)),
244 	DEF_MOD("scu-src1",		1030,	MOD_CLK_ID(1017)),
245 	DEF_MOD("scu-src0",		1031,	MOD_CLK_ID(1017)),
246 };
247 
248 static const unsigned int r8a7796_crit_mod_clks[] __initconst = {
249 	MOD_CLK_ID(408),	/* INTC-AP (GIC) */
250 };
251 
252 
253 /*
254  * CPG Clock Data
255  */
256 
257 /*
258  *   MD		EXTAL		PLL0	PLL1	PLL2	PLL3	PLL4	OSC
259  * 14 13 19 17	(MHz)
260  *-------------------------------------------------------------------------
261  * 0  0  0  0	16.66 x 1	x180	x192	x144	x192	x144	/16
262  * 0  0  0  1	16.66 x 1	x180	x192	x144	x128	x144	/16
263  * 0  0  1  0	Prohibited setting
264  * 0  0  1  1	16.66 x 1	x180	x192	x144	x192	x144	/16
265  * 0  1  0  0	20    x 1	x150	x160	x120	x160	x120	/19
266  * 0  1  0  1	20    x 1	x150	x160	x120	x106	x120	/19
267  * 0  1  1  0	Prohibited setting
268  * 0  1  1  1	20    x 1	x150	x160	x120	x160	x120	/19
269  * 1  0  0  0	25    x 1	x120	x128	x96	x128	x96	/24
270  * 1  0  0  1	25    x 1	x120	x128	x96	x84	x96	/24
271  * 1  0  1  0	Prohibited setting
272  * 1  0  1  1	25    x 1	x120	x128	x96	x128	x96	/24
273  * 1  1  0  0	33.33 / 2	x180	x192	x144	x192	x144	/32
274  * 1  1  0  1	33.33 / 2	x180	x192	x144	x128	x144	/32
275  * 1  1  1  0	Prohibited setting
276  * 1  1  1  1	33.33 / 2	x180	x192	x144	x192	x144	/32
277  */
278 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 11) | \
279 					 (((md) & BIT(13)) >> 11) | \
280 					 (((md) & BIT(19)) >> 18) | \
281 					 (((md) & BIT(17)) >> 17))
282 
283 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
284 	/* EXTAL div	PLL1 mult/div	PLL3 mult/div	OSC prediv */
285 	{ 1,		192,	1,	192,	1,	16,	},
286 	{ 1,		192,	1,	128,	1,	16,	},
287 	{ 0, /* Prohibited setting */				},
288 	{ 1,		192,	1,	192,	1,	16,	},
289 	{ 1,		160,	1,	160,	1,	19,	},
290 	{ 1,		160,	1,	106,	1,	19,	},
291 	{ 0, /* Prohibited setting */				},
292 	{ 1,		160,	1,	160,	1,	19,	},
293 	{ 1,		128,	1,	128,	1,	24,	},
294 	{ 1,		128,	1,	84,	1,	24,	},
295 	{ 0, /* Prohibited setting */				},
296 	{ 1,		128,	1,	128,	1,	24,	},
297 	{ 2,		192,	1,	192,	1,	32,	},
298 	{ 2,		192,	1,	128,	1,	32,	},
299 	{ 0, /* Prohibited setting */				},
300 	{ 2,		192,	1,	192,	1,	32,	},
301 };
302 
303 static int __init r8a7796_cpg_mssr_init(struct device *dev)
304 {
305 	const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
306 	u32 cpg_mode;
307 	int error;
308 
309 	error = rcar_rst_read_mode_pins(&cpg_mode);
310 	if (error)
311 		return error;
312 
313 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
314 	if (!cpg_pll_config->extal_div) {
315 		dev_err(dev, "Prohibited setting (cpg_mode=0x%x)\n", cpg_mode);
316 		return -EINVAL;
317 	}
318 
319 	return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
320 }
321 
322 const struct cpg_mssr_info r8a7796_cpg_mssr_info __initconst = {
323 	/* Core Clocks */
324 	.core_clks = r8a7796_core_clks,
325 	.num_core_clks = ARRAY_SIZE(r8a7796_core_clks),
326 	.last_dt_core_clk = LAST_DT_CORE_CLK,
327 	.num_total_core_clks = MOD_CLK_BASE,
328 
329 	/* Module Clocks */
330 	.mod_clks = r8a7796_mod_clks,
331 	.num_mod_clks = ARRAY_SIZE(r8a7796_mod_clks),
332 	.num_hw_mod_clks = 12 * 32,
333 
334 	/* Critical Module Clocks */
335 	.crit_mod_clks = r8a7796_crit_mod_clks,
336 	.num_crit_mod_clks = ARRAY_SIZE(r8a7796_crit_mod_clks),
337 
338 	/* Callbacks */
339 	.init = r8a7796_cpg_mssr_init,
340 	.cpg_clk_register = rcar_gen3_cpg_clk_register,
341 };
342