1 /*
2  * r8a7791 Clock Pulse Generator / Module Standby and Software Reset
3  *
4  * Copyright (C) 2015-2017 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/of.h>
19 #include <linux/soc/renesas/rcar-rst.h>
20 
21 #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
22 
23 #include "renesas-cpg-mssr.h"
24 #include "rcar-gen2-cpg.h"
25 
26 enum clk_ids {
27 	/* Core Clock Outputs exported to DT */
28 	LAST_DT_CORE_CLK = R8A7791_CLK_OSC,
29 
30 	/* External Input Clocks */
31 	CLK_EXTAL,
32 	CLK_USB_EXTAL,
33 
34 	/* Internal Core Clocks */
35 	CLK_MAIN,
36 	CLK_PLL0,
37 	CLK_PLL1,
38 	CLK_PLL3,
39 	CLK_PLL1_DIV2,
40 
41 	/* Module Clocks */
42 	MOD_CLK_BASE
43 };
44 
45 static struct cpg_core_clk r8a7791_core_clks[] __initdata = {
46 	/* External Clock Inputs */
47 	DEF_INPUT("extal",     CLK_EXTAL),
48 	DEF_INPUT("usb_extal", CLK_USB_EXTAL),
49 
50 	/* Internal Core Clocks */
51 	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
52 	DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
53 	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
54 	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),
55 
56 	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
57 
58 	/* Core Clock Outputs */
59 	DEF_BASE("z",    R8A7791_CLK_Z,    CLK_TYPE_GEN2_Z,    CLK_PLL0),
60 	DEF_BASE("lb",   R8A7791_CLK_LB,   CLK_TYPE_GEN2_LB,   CLK_PLL1),
61 	DEF_BASE("adsp", R8A7791_CLK_ADSP, CLK_TYPE_GEN2_ADSP, CLK_PLL1),
62 	DEF_BASE("sdh",  R8A7791_CLK_SDH,  CLK_TYPE_GEN2_SDH,  CLK_PLL1),
63 	DEF_BASE("sd0",  R8A7791_CLK_SD0,  CLK_TYPE_GEN2_SD0,  CLK_PLL1),
64 	DEF_BASE("qspi", R8A7791_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
65 	DEF_BASE("rcan", R8A7791_CLK_RCAN, CLK_TYPE_GEN2_RCAN, CLK_USB_EXTAL),
66 
67 	DEF_FIXED("zg",     R8A7791_CLK_ZG,    CLK_PLL1,          3, 1),
68 	DEF_FIXED("zx",     R8A7791_CLK_ZX,    CLK_PLL1,          3, 1),
69 	DEF_FIXED("zs",     R8A7791_CLK_ZS,    CLK_PLL1,          6, 1),
70 	DEF_FIXED("hp",     R8A7791_CLK_HP,    CLK_PLL1,         12, 1),
71 	DEF_FIXED("i",      R8A7791_CLK_I,     CLK_PLL1,          2, 1),
72 	DEF_FIXED("b",      R8A7791_CLK_B,     CLK_PLL1,         12, 1),
73 	DEF_FIXED("p",      R8A7791_CLK_P,     CLK_PLL1,         24, 1),
74 	DEF_FIXED("cl",     R8A7791_CLK_CL,    CLK_PLL1,         48, 1),
75 	DEF_FIXED("m2",     R8A7791_CLK_M2,    CLK_PLL1,          8, 1),
76 	DEF_FIXED("zb3",    R8A7791_CLK_ZB3,   CLK_PLL3,          4, 1),
77 	DEF_FIXED("zb3d2",  R8A7791_CLK_ZB3D2, CLK_PLL3,          8, 1),
78 	DEF_FIXED("ddr",    R8A7791_CLK_DDR,   CLK_PLL3,          8, 1),
79 	DEF_FIXED("mp",     R8A7791_CLK_MP,    CLK_PLL1_DIV2,    15, 1),
80 	DEF_FIXED("cp",     R8A7791_CLK_CP,    CLK_EXTAL,         2, 1),
81 	DEF_FIXED("r",      R8A7791_CLK_R,     CLK_PLL1,      49152, 1),
82 	DEF_FIXED("osc",    R8A7791_CLK_OSC,   CLK_PLL1,      12288, 1),
83 
84 	DEF_DIV6P1("sd2",   R8A7791_CLK_SD2,   CLK_PLL1_DIV2, 0x078),
85 	DEF_DIV6P1("sd3",   R8A7791_CLK_SD3,   CLK_PLL1_DIV2, 0x26c),
86 	DEF_DIV6P1("mmc0",  R8A7791_CLK_MMC0,  CLK_PLL1_DIV2, 0x240),
87 	DEF_DIV6P1("ssp",   R8A7791_CLK_SSP,   CLK_PLL1_DIV2, 0x248),
88 	DEF_DIV6P1("ssprs", R8A7791_CLK_SSPRS, CLK_PLL1_DIV2, 0x24c),
89 };
90 
91 static const struct mssr_mod_clk r8a7791_mod_clks[] __initconst = {
92 	DEF_MOD("msiof0",		   0,	R8A7791_CLK_MP),
93 	DEF_MOD("vcp0",			 101,	R8A7791_CLK_ZS),
94 	DEF_MOD("vpc0",			 103,	R8A7791_CLK_ZS),
95 	DEF_MOD("jpu",			 106,	R8A7791_CLK_M2),
96 	DEF_MOD("ssp1",			 109,	R8A7791_CLK_ZS),
97 	DEF_MOD("tmu1",			 111,	R8A7791_CLK_P),
98 	DEF_MOD("3dg",			 112,	R8A7791_CLK_ZG),
99 	DEF_MOD("2d-dmac",		 115,	R8A7791_CLK_ZS),
100 	DEF_MOD("fdp1-1",		 118,	R8A7791_CLK_ZS),
101 	DEF_MOD("fdp1-0",		 119,	R8A7791_CLK_ZS),
102 	DEF_MOD("tmu3",			 121,	R8A7791_CLK_P),
103 	DEF_MOD("tmu2",			 122,	R8A7791_CLK_P),
104 	DEF_MOD("cmt0",			 124,	R8A7791_CLK_R),
105 	DEF_MOD("tmu0",			 125,	R8A7791_CLK_CP),
106 	DEF_MOD("vsp1du1",		 127,	R8A7791_CLK_ZS),
107 	DEF_MOD("vsp1du0",		 128,	R8A7791_CLK_ZS),
108 	DEF_MOD("vsp1-sy",		 131,	R8A7791_CLK_ZS),
109 	DEF_MOD("scifa2",		 202,	R8A7791_CLK_MP),
110 	DEF_MOD("scifa1",		 203,	R8A7791_CLK_MP),
111 	DEF_MOD("scifa0",		 204,	R8A7791_CLK_MP),
112 	DEF_MOD("msiof2",		 205,	R8A7791_CLK_MP),
113 	DEF_MOD("scifb0",		 206,	R8A7791_CLK_MP),
114 	DEF_MOD("scifb1",		 207,	R8A7791_CLK_MP),
115 	DEF_MOD("msiof1",		 208,	R8A7791_CLK_MP),
116 	DEF_MOD("scifb2",		 216,	R8A7791_CLK_MP),
117 	DEF_MOD("sys-dmac1",		 218,	R8A7791_CLK_ZS),
118 	DEF_MOD("sys-dmac0",		 219,	R8A7791_CLK_ZS),
119 	DEF_MOD("tpu0",			 304,	R8A7791_CLK_CP),
120 	DEF_MOD("sdhi3",		 311,	R8A7791_CLK_SD3),
121 	DEF_MOD("sdhi2",		 312,	R8A7791_CLK_SD2),
122 	DEF_MOD("sdhi0",		 314,	R8A7791_CLK_SD0),
123 	DEF_MOD("mmcif0",		 315,	R8A7791_CLK_MMC0),
124 	DEF_MOD("iic0",			 318,	R8A7791_CLK_HP),
125 	DEF_MOD("pciec",		 319,	R8A7791_CLK_MP),
126 	DEF_MOD("iic1",			 323,	R8A7791_CLK_HP),
127 	DEF_MOD("usb3.0",		 328,	R8A7791_CLK_MP),
128 	DEF_MOD("cmt1",			 329,	R8A7791_CLK_R),
129 	DEF_MOD("usbhs-dmac0",		 330,	R8A7791_CLK_HP),
130 	DEF_MOD("usbhs-dmac1",		 331,	R8A7791_CLK_HP),
131 	DEF_MOD("irqc",			 407,	R8A7791_CLK_CP),
132 	DEF_MOD("intc-sys",		 408,	R8A7791_CLK_ZS),
133 	DEF_MOD("audio-dmac1",		 501,	R8A7791_CLK_HP),
134 	DEF_MOD("audio-dmac0",		 502,	R8A7791_CLK_HP),
135 	DEF_MOD("adsp_mod",		 506,	R8A7791_CLK_ADSP),
136 	DEF_MOD("thermal",		 522,	CLK_EXTAL),
137 	DEF_MOD("pwm",			 523,	R8A7791_CLK_P),
138 	DEF_MOD("usb-ehci",		 703,	R8A7791_CLK_MP),
139 	DEF_MOD("usbhs",		 704,	R8A7791_CLK_HP),
140 	DEF_MOD("hscif2",		 713,	R8A7791_CLK_ZS),
141 	DEF_MOD("scif5",		 714,	R8A7791_CLK_P),
142 	DEF_MOD("scif4",		 715,	R8A7791_CLK_P),
143 	DEF_MOD("hscif1",		 716,	R8A7791_CLK_ZS),
144 	DEF_MOD("hscif0",		 717,	R8A7791_CLK_ZS),
145 	DEF_MOD("scif3",		 718,	R8A7791_CLK_P),
146 	DEF_MOD("scif2",		 719,	R8A7791_CLK_P),
147 	DEF_MOD("scif1",		 720,	R8A7791_CLK_P),
148 	DEF_MOD("scif0",		 721,	R8A7791_CLK_P),
149 	DEF_MOD("du1",			 723,	R8A7791_CLK_ZX),
150 	DEF_MOD("du0",			 724,	R8A7791_CLK_ZX),
151 	DEF_MOD("lvds0",		 726,	R8A7791_CLK_ZX),
152 	DEF_MOD("ipmmu-sgx",		 800,	R8A7791_CLK_ZX),
153 	DEF_MOD("mlb",			 802,	R8A7791_CLK_HP),
154 	DEF_MOD("vin2",			 809,	R8A7791_CLK_ZG),
155 	DEF_MOD("vin1",			 810,	R8A7791_CLK_ZG),
156 	DEF_MOD("vin0",			 811,	R8A7791_CLK_ZG),
157 	DEF_MOD("etheravb",		 812,	R8A7791_CLK_HP),
158 	DEF_MOD("ether",		 813,	R8A7791_CLK_P),
159 	DEF_MOD("sata1",		 814,	R8A7791_CLK_ZS),
160 	DEF_MOD("sata0",		 815,	R8A7791_CLK_ZS),
161 	DEF_MOD("gyro-adc",		 901,	R8A7791_CLK_P),
162 	DEF_MOD("gpio7",		 904,	R8A7791_CLK_CP),
163 	DEF_MOD("gpio6",		 905,	R8A7791_CLK_CP),
164 	DEF_MOD("gpio5",		 907,	R8A7791_CLK_CP),
165 	DEF_MOD("gpio4",		 908,	R8A7791_CLK_CP),
166 	DEF_MOD("gpio3",		 909,	R8A7791_CLK_CP),
167 	DEF_MOD("gpio2",		 910,	R8A7791_CLK_CP),
168 	DEF_MOD("gpio1",		 911,	R8A7791_CLK_CP),
169 	DEF_MOD("gpio0",		 912,	R8A7791_CLK_CP),
170 	DEF_MOD("can1",			 915,	R8A7791_CLK_P),
171 	DEF_MOD("can0",			 916,	R8A7791_CLK_P),
172 	DEF_MOD("qspi_mod",		 917,	R8A7791_CLK_QSPI),
173 	DEF_MOD("i2c5",			 925,	R8A7791_CLK_HP),
174 	DEF_MOD("iicdvfs",		 926,	R8A7791_CLK_CP),
175 	DEF_MOD("i2c4",			 927,	R8A7791_CLK_HP),
176 	DEF_MOD("i2c3",			 928,	R8A7791_CLK_HP),
177 	DEF_MOD("i2c2",			 929,	R8A7791_CLK_HP),
178 	DEF_MOD("i2c1",			 930,	R8A7791_CLK_HP),
179 	DEF_MOD("i2c0",			 931,	R8A7791_CLK_HP),
180 	DEF_MOD("ssi-all",		1005,	R8A7791_CLK_P),
181 	DEF_MOD("ssi9",			1006,	MOD_CLK_ID(1005)),
182 	DEF_MOD("ssi8",			1007,	MOD_CLK_ID(1005)),
183 	DEF_MOD("ssi7",			1008,	MOD_CLK_ID(1005)),
184 	DEF_MOD("ssi6",			1009,	MOD_CLK_ID(1005)),
185 	DEF_MOD("ssi5",			1010,	MOD_CLK_ID(1005)),
186 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
187 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
188 	DEF_MOD("ssi2",			1013,	MOD_CLK_ID(1005)),
189 	DEF_MOD("ssi1",			1014,	MOD_CLK_ID(1005)),
190 	DEF_MOD("ssi0",			1015,	MOD_CLK_ID(1005)),
191 	DEF_MOD("scu-all",		1017,	R8A7791_CLK_P),
192 	DEF_MOD("scu-dvc1",		1018,	MOD_CLK_ID(1017)),
193 	DEF_MOD("scu-dvc0",		1019,	MOD_CLK_ID(1017)),
194 	DEF_MOD("scu-ctu1-mix1",	1020,	MOD_CLK_ID(1017)),
195 	DEF_MOD("scu-ctu0-mix0",	1021,	MOD_CLK_ID(1017)),
196 	DEF_MOD("scu-src9",		1022,	MOD_CLK_ID(1017)),
197 	DEF_MOD("scu-src8",		1023,	MOD_CLK_ID(1017)),
198 	DEF_MOD("scu-src7",		1024,	MOD_CLK_ID(1017)),
199 	DEF_MOD("scu-src6",		1025,	MOD_CLK_ID(1017)),
200 	DEF_MOD("scu-src5",		1026,	MOD_CLK_ID(1017)),
201 	DEF_MOD("scu-src4",		1027,	MOD_CLK_ID(1017)),
202 	DEF_MOD("scu-src3",		1028,	MOD_CLK_ID(1017)),
203 	DEF_MOD("scu-src2",		1029,	MOD_CLK_ID(1017)),
204 	DEF_MOD("scu-src1",		1030,	MOD_CLK_ID(1017)),
205 	DEF_MOD("scu-src0",		1031,	MOD_CLK_ID(1017)),
206 	DEF_MOD("scifa3",		1106,	R8A7791_CLK_MP),
207 	DEF_MOD("scifa4",		1107,	R8A7791_CLK_MP),
208 	DEF_MOD("scifa5",		1108,	R8A7791_CLK_MP),
209 };
210 
211 static const unsigned int r8a7791_crit_mod_clks[] __initconst = {
212 	MOD_CLK_ID(408),	/* INTC-SYS (GIC) */
213 };
214 
215 /*
216  * CPG Clock Data
217  */
218 
219 /*
220  *   MD		EXTAL		PLL0	PLL1	PLL3
221  * 14 13 19	(MHz)		*1	*1
222  *---------------------------------------------------
223  * 0  0  0	15		x172/2	x208/2	x106
224  * 0  0  1	15		x172/2	x208/2	x88
225  * 0  1  0	20		x130/2	x156/2	x80
226  * 0  1  1	20		x130/2	x156/2	x66
227  * 1  0  0	26 / 2		x200/2	x240/2	x122
228  * 1  0  1	26 / 2		x200/2	x240/2	x102
229  * 1  1  0	30 / 2		x172/2	x208/2	x106
230  * 1  1  1	30 / 2		x172/2	x208/2	x88
231  *
232  * *1 :	Table 7.5a indicates VCO output (PLLx = VCO/2)
233  */
234 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 12) | \
235 					 (((md) & BIT(13)) >> 12) | \
236 					 (((md) & BIT(19)) >> 19))
237 static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[8] __initconst = {
238 	{ 1, 208, 106 }, { 1, 208,  88 }, { 1, 156,  80 }, { 1, 156,  66 },
239 	{ 2, 240, 122 }, { 2, 240, 102 }, { 2, 208, 106 }, { 2, 208,  88 },
240 };
241 
242 static int __init r8a7791_cpg_mssr_init(struct device *dev)
243 {
244 	const struct rcar_gen2_cpg_pll_config *cpg_pll_config;
245 	struct device_node *np = dev->of_node;
246 	unsigned int i;
247 	u32 cpg_mode;
248 	int error;
249 
250 	error = rcar_rst_read_mode_pins(&cpg_mode);
251 	if (error)
252 		return error;
253 
254 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
255 
256 	if (of_device_is_compatible(np, "renesas,r8a7793-cpg-mssr")) {
257 		/* R-Car M2-N uses a 1/5 divider for ZG */
258 		for (i = 0; i < ARRAY_SIZE(r8a7791_core_clks); i++)
259 			if (r8a7791_core_clks[i].id == R8A7791_CLK_ZG) {
260 				r8a7791_core_clks[i].div = 5;
261 				break;
262 			}
263 	}
264 	return rcar_gen2_cpg_init(cpg_pll_config, 2, cpg_mode);
265 }
266 
267 const struct cpg_mssr_info r8a7791_cpg_mssr_info __initconst = {
268 	/* Core Clocks */
269 	.core_clks = r8a7791_core_clks,
270 	.num_core_clks = ARRAY_SIZE(r8a7791_core_clks),
271 	.last_dt_core_clk = LAST_DT_CORE_CLK,
272 	.num_total_core_clks = MOD_CLK_BASE,
273 
274 	/* Module Clocks */
275 	.mod_clks = r8a7791_mod_clks,
276 	.num_mod_clks = ARRAY_SIZE(r8a7791_mod_clks),
277 	.num_hw_mod_clks = 12 * 32,
278 
279 	/* Critical Module Clocks */
280 	.crit_mod_clks = r8a7791_crit_mod_clks,
281 	.num_crit_mod_clks = ARRAY_SIZE(r8a7791_crit_mod_clks),
282 
283 	/* Callbacks */
284 	.init = r8a7791_cpg_mssr_init,
285 	.cpg_clk_register = rcar_gen2_cpg_clk_register,
286 };
287