1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a7791 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2015-2017 Glider bvba
6  *
7  * Based on clk-rcar-gen2.c
8  *
9  * Copyright (C) 2013 Ideas On Board SPRL
10  */
11 
12 #include <linux/device.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/of.h>
16 #include <linux/soc/renesas/rcar-rst.h>
17 
18 #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
19 
20 #include "renesas-cpg-mssr.h"
21 #include "rcar-gen2-cpg.h"
22 
23 enum clk_ids {
24 	/* Core Clock Outputs exported to DT */
25 	LAST_DT_CORE_CLK = R8A7791_CLK_OSC,
26 
27 	/* External Input Clocks */
28 	CLK_EXTAL,
29 	CLK_USB_EXTAL,
30 
31 	/* Internal Core Clocks */
32 	CLK_MAIN,
33 	CLK_PLL0,
34 	CLK_PLL1,
35 	CLK_PLL3,
36 	CLK_PLL1_DIV2,
37 
38 	/* Module Clocks */
39 	MOD_CLK_BASE
40 };
41 
42 static struct cpg_core_clk r8a7791_core_clks[] __initdata = {
43 	/* External Clock Inputs */
44 	DEF_INPUT("extal",     CLK_EXTAL),
45 	DEF_INPUT("usb_extal", CLK_USB_EXTAL),
46 
47 	/* Internal Core Clocks */
48 	DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
49 	DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
50 	DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
51 	DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),
52 
53 	DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
54 
55 	/* Core Clock Outputs */
56 	DEF_BASE("z",    R8A7791_CLK_Z,    CLK_TYPE_GEN2_Z,    CLK_PLL0),
57 	DEF_BASE("adsp", R8A7791_CLK_ADSP, CLK_TYPE_GEN2_ADSP, CLK_PLL1),
58 	DEF_BASE("sdh",  R8A7791_CLK_SDH,  CLK_TYPE_GEN2_SDH,  CLK_PLL1),
59 	DEF_BASE("sd0",  R8A7791_CLK_SD0,  CLK_TYPE_GEN2_SD0,  CLK_PLL1),
60 	DEF_BASE("qspi", R8A7791_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
61 	DEF_BASE("rcan", R8A7791_CLK_RCAN, CLK_TYPE_GEN2_RCAN, CLK_USB_EXTAL),
62 
63 	DEF_FIXED("zg",     R8A7791_CLK_ZG,    CLK_PLL1,          3, 1),
64 	DEF_FIXED("zx",     R8A7791_CLK_ZX,    CLK_PLL1,          3, 1),
65 	DEF_FIXED("zs",     R8A7791_CLK_ZS,    CLK_PLL1,          6, 1),
66 	DEF_FIXED("hp",     R8A7791_CLK_HP,    CLK_PLL1,         12, 1),
67 	DEF_FIXED("i",      R8A7791_CLK_I,     CLK_PLL1,          2, 1),
68 	DEF_FIXED("b",      R8A7791_CLK_B,     CLK_PLL1,         12, 1),
69 	DEF_FIXED("lb",     R8A7791_CLK_LB,    CLK_PLL1,         24, 1),
70 	DEF_FIXED("p",      R8A7791_CLK_P,     CLK_PLL1,         24, 1),
71 	DEF_FIXED("cl",     R8A7791_CLK_CL,    CLK_PLL1,         48, 1),
72 	DEF_FIXED("m2",     R8A7791_CLK_M2,    CLK_PLL1,          8, 1),
73 	DEF_FIXED("zb3",    R8A7791_CLK_ZB3,   CLK_PLL3,          4, 1),
74 	DEF_FIXED("zb3d2",  R8A7791_CLK_ZB3D2, CLK_PLL3,          8, 1),
75 	DEF_FIXED("ddr",    R8A7791_CLK_DDR,   CLK_PLL3,          8, 1),
76 	DEF_FIXED("mp",     R8A7791_CLK_MP,    CLK_PLL1_DIV2,    15, 1),
77 	DEF_FIXED("cp",     R8A7791_CLK_CP,    CLK_EXTAL,         2, 1),
78 	DEF_FIXED("r",      R8A7791_CLK_R,     CLK_PLL1,      49152, 1),
79 	DEF_FIXED("osc",    R8A7791_CLK_OSC,   CLK_PLL1,      12288, 1),
80 
81 	DEF_DIV6P1("sd2",   R8A7791_CLK_SD2,   CLK_PLL1_DIV2, 0x078),
82 	DEF_DIV6P1("sd3",   R8A7791_CLK_SD3,   CLK_PLL1_DIV2, 0x26c),
83 	DEF_DIV6P1("mmc0",  R8A7791_CLK_MMC0,  CLK_PLL1_DIV2, 0x240),
84 	DEF_DIV6P1("ssp",   R8A7791_CLK_SSP,   CLK_PLL1_DIV2, 0x248),
85 	DEF_DIV6P1("ssprs", R8A7791_CLK_SSPRS, CLK_PLL1_DIV2, 0x24c),
86 };
87 
88 static const struct mssr_mod_clk r8a7791_mod_clks[] __initconst = {
89 	DEF_MOD("msiof0",		   0,	R8A7791_CLK_MP),
90 	DEF_MOD("vcp0",			 101,	R8A7791_CLK_ZS),
91 	DEF_MOD("vpc0",			 103,	R8A7791_CLK_ZS),
92 	DEF_MOD("jpu",			 106,	R8A7791_CLK_M2),
93 	DEF_MOD("ssp1",			 109,	R8A7791_CLK_ZS),
94 	DEF_MOD("tmu1",			 111,	R8A7791_CLK_P),
95 	DEF_MOD("3dg",			 112,	R8A7791_CLK_ZG),
96 	DEF_MOD("2d-dmac",		 115,	R8A7791_CLK_ZS),
97 	DEF_MOD("fdp1-1",		 118,	R8A7791_CLK_ZS),
98 	DEF_MOD("fdp1-0",		 119,	R8A7791_CLK_ZS),
99 	DEF_MOD("tmu3",			 121,	R8A7791_CLK_P),
100 	DEF_MOD("tmu2",			 122,	R8A7791_CLK_P),
101 	DEF_MOD("cmt0",			 124,	R8A7791_CLK_R),
102 	DEF_MOD("tmu0",			 125,	R8A7791_CLK_CP),
103 	DEF_MOD("vsp1du1",		 127,	R8A7791_CLK_ZS),
104 	DEF_MOD("vsp1du0",		 128,	R8A7791_CLK_ZS),
105 	DEF_MOD("vsps",			 131,	R8A7791_CLK_ZS),
106 	DEF_MOD("scifa2",		 202,	R8A7791_CLK_MP),
107 	DEF_MOD("scifa1",		 203,	R8A7791_CLK_MP),
108 	DEF_MOD("scifa0",		 204,	R8A7791_CLK_MP),
109 	DEF_MOD("msiof2",		 205,	R8A7791_CLK_MP),
110 	DEF_MOD("scifb0",		 206,	R8A7791_CLK_MP),
111 	DEF_MOD("scifb1",		 207,	R8A7791_CLK_MP),
112 	DEF_MOD("msiof1",		 208,	R8A7791_CLK_MP),
113 	DEF_MOD("scifb2",		 216,	R8A7791_CLK_MP),
114 	DEF_MOD("sys-dmac1",		 218,	R8A7791_CLK_ZS),
115 	DEF_MOD("sys-dmac0",		 219,	R8A7791_CLK_ZS),
116 	DEF_MOD("tpu0",			 304,	R8A7791_CLK_CP),
117 	DEF_MOD("sdhi3",		 311,	R8A7791_CLK_SD3),
118 	DEF_MOD("sdhi2",		 312,	R8A7791_CLK_SD2),
119 	DEF_MOD("sdhi0",		 314,	R8A7791_CLK_SD0),
120 	DEF_MOD("mmcif0",		 315,	R8A7791_CLK_MMC0),
121 	DEF_MOD("iic0",			 318,	R8A7791_CLK_HP),
122 	DEF_MOD("pciec",		 319,	R8A7791_CLK_MP),
123 	DEF_MOD("iic1",			 323,	R8A7791_CLK_HP),
124 	DEF_MOD("usb3.0",		 328,	R8A7791_CLK_MP),
125 	DEF_MOD("cmt1",			 329,	R8A7791_CLK_R),
126 	DEF_MOD("usbhs-dmac0",		 330,	R8A7791_CLK_HP),
127 	DEF_MOD("usbhs-dmac1",		 331,	R8A7791_CLK_HP),
128 	DEF_MOD("rwdt",			 402,	R8A7791_CLK_R),
129 	DEF_MOD("irqc",			 407,	R8A7791_CLK_CP),
130 	DEF_MOD("intc-sys",		 408,	R8A7791_CLK_ZS),
131 	DEF_MOD("audio-dmac1",		 501,	R8A7791_CLK_HP),
132 	DEF_MOD("audio-dmac0",		 502,	R8A7791_CLK_HP),
133 	DEF_MOD("adsp_mod",		 506,	R8A7791_CLK_ADSP),
134 	DEF_MOD("thermal",		 522,	CLK_EXTAL),
135 	DEF_MOD("pwm",			 523,	R8A7791_CLK_P),
136 	DEF_MOD("usb-ehci",		 703,	R8A7791_CLK_MP),
137 	DEF_MOD("usbhs",		 704,	R8A7791_CLK_HP),
138 	DEF_MOD("hscif2",		 713,	R8A7791_CLK_ZS),
139 	DEF_MOD("scif5",		 714,	R8A7791_CLK_P),
140 	DEF_MOD("scif4",		 715,	R8A7791_CLK_P),
141 	DEF_MOD("hscif1",		 716,	R8A7791_CLK_ZS),
142 	DEF_MOD("hscif0",		 717,	R8A7791_CLK_ZS),
143 	DEF_MOD("scif3",		 718,	R8A7791_CLK_P),
144 	DEF_MOD("scif2",		 719,	R8A7791_CLK_P),
145 	DEF_MOD("scif1",		 720,	R8A7791_CLK_P),
146 	DEF_MOD("scif0",		 721,	R8A7791_CLK_P),
147 	DEF_MOD("du1",			 723,	R8A7791_CLK_ZX),
148 	DEF_MOD("du0",			 724,	R8A7791_CLK_ZX),
149 	DEF_MOD("lvds0",		 726,	R8A7791_CLK_ZX),
150 	DEF_MOD("ipmmu-sgx",		 800,	R8A7791_CLK_ZX),
151 	DEF_MOD("mlb",			 802,	R8A7791_CLK_HP),
152 	DEF_MOD("vin2",			 809,	R8A7791_CLK_ZG),
153 	DEF_MOD("vin1",			 810,	R8A7791_CLK_ZG),
154 	DEF_MOD("vin0",			 811,	R8A7791_CLK_ZG),
155 	DEF_MOD("etheravb",		 812,	R8A7791_CLK_HP),
156 	DEF_MOD("ether",		 813,	R8A7791_CLK_P),
157 	DEF_MOD("sata1",		 814,	R8A7791_CLK_ZS),
158 	DEF_MOD("sata0",		 815,	R8A7791_CLK_ZS),
159 	DEF_MOD("gyro-adc",		 901,	R8A7791_CLK_P),
160 	DEF_MOD("gpio7",		 904,	R8A7791_CLK_CP),
161 	DEF_MOD("gpio6",		 905,	R8A7791_CLK_CP),
162 	DEF_MOD("gpio5",		 907,	R8A7791_CLK_CP),
163 	DEF_MOD("gpio4",		 908,	R8A7791_CLK_CP),
164 	DEF_MOD("gpio3",		 909,	R8A7791_CLK_CP),
165 	DEF_MOD("gpio2",		 910,	R8A7791_CLK_CP),
166 	DEF_MOD("gpio1",		 911,	R8A7791_CLK_CP),
167 	DEF_MOD("gpio0",		 912,	R8A7791_CLK_CP),
168 	DEF_MOD("can1",			 915,	R8A7791_CLK_P),
169 	DEF_MOD("can0",			 916,	R8A7791_CLK_P),
170 	DEF_MOD("qspi_mod",		 917,	R8A7791_CLK_QSPI),
171 	DEF_MOD("i2c5",			 925,	R8A7791_CLK_HP),
172 	DEF_MOD("iicdvfs",		 926,	R8A7791_CLK_CP),
173 	DEF_MOD("i2c4",			 927,	R8A7791_CLK_HP),
174 	DEF_MOD("i2c3",			 928,	R8A7791_CLK_HP),
175 	DEF_MOD("i2c2",			 929,	R8A7791_CLK_HP),
176 	DEF_MOD("i2c1",			 930,	R8A7791_CLK_HP),
177 	DEF_MOD("i2c0",			 931,	R8A7791_CLK_HP),
178 	DEF_MOD("ssi-all",		1005,	R8A7791_CLK_P),
179 	DEF_MOD("ssi9",			1006,	MOD_CLK_ID(1005)),
180 	DEF_MOD("ssi8",			1007,	MOD_CLK_ID(1005)),
181 	DEF_MOD("ssi7",			1008,	MOD_CLK_ID(1005)),
182 	DEF_MOD("ssi6",			1009,	MOD_CLK_ID(1005)),
183 	DEF_MOD("ssi5",			1010,	MOD_CLK_ID(1005)),
184 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
185 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
186 	DEF_MOD("ssi2",			1013,	MOD_CLK_ID(1005)),
187 	DEF_MOD("ssi1",			1014,	MOD_CLK_ID(1005)),
188 	DEF_MOD("ssi0",			1015,	MOD_CLK_ID(1005)),
189 	DEF_MOD("scu-all",		1017,	R8A7791_CLK_P),
190 	DEF_MOD("scu-dvc1",		1018,	MOD_CLK_ID(1017)),
191 	DEF_MOD("scu-dvc0",		1019,	MOD_CLK_ID(1017)),
192 	DEF_MOD("scu-ctu1-mix1",	1020,	MOD_CLK_ID(1017)),
193 	DEF_MOD("scu-ctu0-mix0",	1021,	MOD_CLK_ID(1017)),
194 	DEF_MOD("scu-src9",		1022,	MOD_CLK_ID(1017)),
195 	DEF_MOD("scu-src8",		1023,	MOD_CLK_ID(1017)),
196 	DEF_MOD("scu-src7",		1024,	MOD_CLK_ID(1017)),
197 	DEF_MOD("scu-src6",		1025,	MOD_CLK_ID(1017)),
198 	DEF_MOD("scu-src5",		1026,	MOD_CLK_ID(1017)),
199 	DEF_MOD("scu-src4",		1027,	MOD_CLK_ID(1017)),
200 	DEF_MOD("scu-src3",		1028,	MOD_CLK_ID(1017)),
201 	DEF_MOD("scu-src2",		1029,	MOD_CLK_ID(1017)),
202 	DEF_MOD("scu-src1",		1030,	MOD_CLK_ID(1017)),
203 	DEF_MOD("scu-src0",		1031,	MOD_CLK_ID(1017)),
204 	DEF_MOD("scifa3",		1106,	R8A7791_CLK_MP),
205 	DEF_MOD("scifa4",		1107,	R8A7791_CLK_MP),
206 	DEF_MOD("scifa5",		1108,	R8A7791_CLK_MP),
207 };
208 
209 static const unsigned int r8a7791_crit_mod_clks[] __initconst = {
210 	MOD_CLK_ID(402),	/* RWDT */
211 	MOD_CLK_ID(408),	/* INTC-SYS (GIC) */
212 };
213 
214 /*
215  * CPG Clock Data
216  */
217 
218 /*
219  *   MD		EXTAL		PLL0	PLL1	PLL3
220  * 14 13 19	(MHz)		*1	*1
221  *---------------------------------------------------
222  * 0  0  0	15		x172/2	x208/2	x106
223  * 0  0  1	15		x172/2	x208/2	x88
224  * 0  1  0	20		x130/2	x156/2	x80
225  * 0  1  1	20		x130/2	x156/2	x66
226  * 1  0  0	26 / 2		x200/2	x240/2	x122
227  * 1  0  1	26 / 2		x200/2	x240/2	x102
228  * 1  1  0	30 / 2		x172/2	x208/2	x106
229  * 1  1  1	30 / 2		x172/2	x208/2	x88
230  *
231  * *1 :	Table 7.5a indicates VCO output (PLLx = VCO/2)
232  */
233 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 12) | \
234 					 (((md) & BIT(13)) >> 12) | \
235 					 (((md) & BIT(19)) >> 19))
236 static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[8] __initconst = {
237 	{ 1, 208, 106 }, { 1, 208,  88 }, { 1, 156,  80 }, { 1, 156,  66 },
238 	{ 2, 240, 122 }, { 2, 240, 102 }, { 2, 208, 106 }, { 2, 208,  88 },
239 };
240 
r8a7791_cpg_mssr_init(struct device * dev)241 static int __init r8a7791_cpg_mssr_init(struct device *dev)
242 {
243 	const struct rcar_gen2_cpg_pll_config *cpg_pll_config;
244 	struct device_node *np = dev->of_node;
245 	unsigned int i;
246 	u32 cpg_mode;
247 	int error;
248 
249 	error = rcar_rst_read_mode_pins(&cpg_mode);
250 	if (error)
251 		return error;
252 
253 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
254 
255 	if (of_device_is_compatible(np, "renesas,r8a7793-cpg-mssr")) {
256 		/* R-Car M2-N uses a 1/5 divider for ZG */
257 		for (i = 0; i < ARRAY_SIZE(r8a7791_core_clks); i++)
258 			if (r8a7791_core_clks[i].id == R8A7791_CLK_ZG) {
259 				r8a7791_core_clks[i].div = 5;
260 				break;
261 			}
262 	}
263 	return rcar_gen2_cpg_init(cpg_pll_config, 2, cpg_mode);
264 }
265 
266 const struct cpg_mssr_info r8a7791_cpg_mssr_info __initconst = {
267 	/* Core Clocks */
268 	.core_clks = r8a7791_core_clks,
269 	.num_core_clks = ARRAY_SIZE(r8a7791_core_clks),
270 	.last_dt_core_clk = LAST_DT_CORE_CLK,
271 	.num_total_core_clks = MOD_CLK_BASE,
272 
273 	/* Module Clocks */
274 	.mod_clks = r8a7791_mod_clks,
275 	.num_mod_clks = ARRAY_SIZE(r8a7791_mod_clks),
276 	.num_hw_mod_clks = 12 * 32,
277 
278 	/* Critical Module Clocks */
279 	.crit_mod_clks = r8a7791_crit_mod_clks,
280 	.num_crit_mod_clks = ARRAY_SIZE(r8a7791_crit_mod_clks),
281 
282 	/* Callbacks */
283 	.init = r8a7791_cpg_mssr_init,
284 	.cpg_clk_register = rcar_gen2_cpg_clk_register,
285 };
286