1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a77970 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2017-2018 Cogent Embedded Inc.
6  *
7  * Based on r8a7795-cpg-mssr.c
8  *
9  * Copyright (C) 2015 Glider bvba
10  */
11 
12 #include <linux/clk-provider.h>
13 #include <linux/device.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/soc/renesas/rcar-rst.h>
17 
18 #include <dt-bindings/clock/r8a77970-cpg-mssr.h>
19 
20 #include "renesas-cpg-mssr.h"
21 #include "rcar-gen3-cpg.h"
22 
23 #define CPG_SD0CKCR		0x0074
24 
25 enum r8a77970_clk_types {
26 	CLK_TYPE_R8A77970_SD0H = CLK_TYPE_GEN3_SOC_BASE,
27 	CLK_TYPE_R8A77970_SD0,
28 };
29 
30 enum clk_ids {
31 	/* Core Clock Outputs exported to DT */
32 	LAST_DT_CORE_CLK = R8A77970_CLK_OSC,
33 
34 	/* External Input Clocks */
35 	CLK_EXTAL,
36 	CLK_EXTALR,
37 
38 	/* Internal Core Clocks */
39 	CLK_MAIN,
40 	CLK_PLL0,
41 	CLK_PLL1,
42 	CLK_PLL3,
43 	CLK_PLL1_DIV2,
44 	CLK_PLL1_DIV4,
45 
46 	/* Module Clocks */
47 	MOD_CLK_BASE
48 };
49 
50 static spinlock_t cpg_lock;
51 
52 static const struct clk_div_table cpg_sd0h_div_table[] = {
53 	{  0,  2 }, {  1,  3 }, {  2,  4 }, {  3,  6 },
54 	{  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
55 	{  8, 24 }, { 10, 36 }, { 11, 48 }, {  0,  0 },
56 };
57 
58 static const struct clk_div_table cpg_sd0_div_table[] = {
59 	{  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
60 	{  8, 24 }, { 10, 36 }, { 11, 48 }, { 12, 10 },
61 	{  0,  0 },
62 };
63 
64 static const struct cpg_core_clk r8a77970_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_GEN3_MAIN, CLK_EXTAL),
71 	DEF_BASE(".pll0",	CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
72 	DEF_BASE(".pll1",	CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
73 	DEF_BASE(".pll3",	CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
74 
75 	DEF_FIXED(".pll1_div2",	CLK_PLL1_DIV2,	CLK_PLL1,	2, 1),
76 	DEF_FIXED(".pll1_div4",	CLK_PLL1_DIV4,	CLK_PLL1_DIV2,	2, 1),
77 
78 	/* Core Clock Outputs */
79 	DEF_FIXED("ztr",	R8A77970_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
80 	DEF_FIXED("ztrd2",	R8A77970_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
81 	DEF_FIXED("zt",		R8A77970_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
82 	DEF_FIXED("zx",		R8A77970_CLK_ZX,    CLK_PLL1_DIV2,  3, 1),
83 	DEF_FIXED("s1d1",	R8A77970_CLK_S1D1,  CLK_PLL1_DIV2,  4, 1),
84 	DEF_FIXED("s1d2",	R8A77970_CLK_S1D2,  CLK_PLL1_DIV2,  8, 1),
85 	DEF_FIXED("s1d4",	R8A77970_CLK_S1D4,  CLK_PLL1_DIV2, 16, 1),
86 	DEF_FIXED("s2d1",	R8A77970_CLK_S2D1,  CLK_PLL1_DIV2,  6, 1),
87 	DEF_FIXED("s2d2",	R8A77970_CLK_S2D2,  CLK_PLL1_DIV2, 12, 1),
88 	DEF_FIXED("s2d4",	R8A77970_CLK_S2D4,  CLK_PLL1_DIV2, 24, 1),
89 
90 	DEF_BASE("sd0h", R8A77970_CLK_SD0H, CLK_TYPE_R8A77970_SD0H,
91 		 CLK_PLL1_DIV2),
92 	DEF_BASE("sd0",	R8A77970_CLK_SD0, CLK_TYPE_R8A77970_SD0, CLK_PLL1_DIV2),
93 
94 	DEF_FIXED("rpc",	R8A77970_CLK_RPC,   CLK_PLL1_DIV2,  5, 1),
95 	DEF_FIXED("rpcd2",	R8A77970_CLK_RPCD2, CLK_PLL1_DIV2, 10, 1),
96 
97 	DEF_FIXED("cl",		R8A77970_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
98 	DEF_FIXED("cp",		R8A77970_CLK_CP,    CLK_EXTAL,	    2, 1),
99 	DEF_FIXED("cpex",	R8A77970_CLK_CPEX,  CLK_EXTAL,	    2, 1),
100 
101 	DEF_DIV6P1("canfd",	R8A77970_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
102 	DEF_DIV6P1("mso",	R8A77970_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
103 	DEF_DIV6P1("csi0",	R8A77970_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
104 
105 	DEF_FIXED("osc",	R8A77970_CLK_OSC,   CLK_PLL1_DIV2, 12*1024, 1),
106 	DEF_FIXED("r",		R8A77970_CLK_R,	    CLK_EXTALR,	   1, 1),
107 };
108 
109 static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
110 	DEF_MOD("tmu4",			 121,	R8A77970_CLK_S2D2),
111 	DEF_MOD("tmu3",			 122,	R8A77970_CLK_S2D2),
112 	DEF_MOD("tmu2",			 123,	R8A77970_CLK_S2D2),
113 	DEF_MOD("tmu1",			 124,	R8A77970_CLK_S2D2),
114 	DEF_MOD("tmu0",			 125,	R8A77970_CLK_CP),
115 	DEF_MOD("ivcp1e",		 127,	R8A77970_CLK_S2D1),
116 	DEF_MOD("scif4",		 203,	R8A77970_CLK_S2D4),
117 	DEF_MOD("scif3",		 204,	R8A77970_CLK_S2D4),
118 	DEF_MOD("scif1",		 206,	R8A77970_CLK_S2D4),
119 	DEF_MOD("scif0",		 207,	R8A77970_CLK_S2D4),
120 	DEF_MOD("msiof3",		 208,	R8A77970_CLK_MSO),
121 	DEF_MOD("msiof2",		 209,	R8A77970_CLK_MSO),
122 	DEF_MOD("msiof1",		 210,	R8A77970_CLK_MSO),
123 	DEF_MOD("msiof0",		 211,	R8A77970_CLK_MSO),
124 	DEF_MOD("mfis",			 213,	R8A77970_CLK_S2D2),
125 	DEF_MOD("sys-dmac2",		 217,	R8A77970_CLK_S2D1),
126 	DEF_MOD("sys-dmac1",		 218,	R8A77970_CLK_S2D1),
127 	DEF_MOD("cmt3",			 300,	R8A77970_CLK_R),
128 	DEF_MOD("cmt2",			 301,	R8A77970_CLK_R),
129 	DEF_MOD("cmt1",			 302,	R8A77970_CLK_R),
130 	DEF_MOD("cmt0",			 303,	R8A77970_CLK_R),
131 	DEF_MOD("tpu0",			 304,	R8A77970_CLK_S2D4),
132 	DEF_MOD("sd-if",		 314,	R8A77970_CLK_SD0),
133 	DEF_MOD("rwdt",			 402,	R8A77970_CLK_R),
134 	DEF_MOD("intc-ex",		 407,	R8A77970_CLK_CP),
135 	DEF_MOD("intc-ap",		 408,	R8A77970_CLK_S2D1),
136 	DEF_MOD("hscif3",		 517,	R8A77970_CLK_S2D1),
137 	DEF_MOD("hscif2",		 518,	R8A77970_CLK_S2D1),
138 	DEF_MOD("hscif1",		 519,	R8A77970_CLK_S2D1),
139 	DEF_MOD("hscif0",		 520,	R8A77970_CLK_S2D1),
140 	DEF_MOD("thermal",		 522,	R8A77970_CLK_CP),
141 	DEF_MOD("pwm",			 523,	R8A77970_CLK_S2D4),
142 	DEF_MOD("fcpvd0",		 603,	R8A77970_CLK_S2D1),
143 	DEF_MOD("vspd0",		 623,	R8A77970_CLK_S2D1),
144 	DEF_MOD("csi40",		 716,	R8A77970_CLK_CSI0),
145 	DEF_MOD("du0",			 724,	R8A77970_CLK_S2D1),
146 	DEF_MOD("lvds",			 727,	R8A77970_CLK_S2D1),
147 	DEF_MOD("vin3",			 808,	R8A77970_CLK_S2D1),
148 	DEF_MOD("vin2",			 809,	R8A77970_CLK_S2D1),
149 	DEF_MOD("vin1",			 810,	R8A77970_CLK_S2D1),
150 	DEF_MOD("vin0",			 811,	R8A77970_CLK_S2D1),
151 	DEF_MOD("etheravb",		 812,	R8A77970_CLK_S2D2),
152 	DEF_MOD("gpio5",		 907,	R8A77970_CLK_CP),
153 	DEF_MOD("gpio4",		 908,	R8A77970_CLK_CP),
154 	DEF_MOD("gpio3",		 909,	R8A77970_CLK_CP),
155 	DEF_MOD("gpio2",		 910,	R8A77970_CLK_CP),
156 	DEF_MOD("gpio1",		 911,	R8A77970_CLK_CP),
157 	DEF_MOD("gpio0",		 912,	R8A77970_CLK_CP),
158 	DEF_MOD("can-fd",		 914,	R8A77970_CLK_S2D2),
159 	DEF_MOD("rpc-if",		 917,	R8A77970_CLK_RPC),
160 	DEF_MOD("i2c4",			 927,	R8A77970_CLK_S2D2),
161 	DEF_MOD("i2c3",			 928,	R8A77970_CLK_S2D2),
162 	DEF_MOD("i2c2",			 929,	R8A77970_CLK_S2D2),
163 	DEF_MOD("i2c1",			 930,	R8A77970_CLK_S2D2),
164 	DEF_MOD("i2c0",			 931,	R8A77970_CLK_S2D2),
165 };
166 
167 static const unsigned int r8a77970_crit_mod_clks[] __initconst = {
168 	MOD_CLK_ID(402),	/* RWDT */
169 	MOD_CLK_ID(408),	/* INTC-AP (GIC) */
170 };
171 
172 /*
173  * CPG Clock Data
174  */
175 
176 /*
177  *   MD		EXTAL		PLL0	PLL1	PLL3
178  * 14 13 19	(MHz)
179  *-------------------------------------------------
180  * 0  0  0	16.66 x 1	x192	x192	x96
181  * 0  0  1	16.66 x 1	x192	x192	x80
182  * 0  1  0	20    x 1	x160	x160	x80
183  * 0  1  1	20    x 1	x160	x160	x66
184  * 1  0  0	27    / 2	x236	x236	x118
185  * 1  0  1	27    / 2	x236	x236	x98
186  * 1  1  0	33.33 / 2	x192	x192	x96
187  * 1  1  1	33.33 / 2	x192	x192	x80
188  */
189 #define CPG_PLL_CONFIG_INDEX(md)	((((md) & BIT(14)) >> 12) | \
190 					 (((md) & BIT(13)) >> 12) | \
191 					 (((md) & BIT(19)) >> 19))
192 
193 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] __initconst = {
194 	/* EXTAL div	PLL1 mult/div	PLL3 mult/div */
195 	{ 1,		192,	1,	96,	1,	},
196 	{ 1,		192,	1,	80,	1,	},
197 	{ 1,		160,	1,	80,	1,	},
198 	{ 1,		160,	1,	66,	1,	},
199 	{ 2,		236,	1,	118,	1,	},
200 	{ 2,		236,	1,	98,	1,	},
201 	{ 2,		192,	1,	96,	1,	},
202 	{ 2,		192,	1,	80,	1,	},
203 };
204 
r8a77970_cpg_mssr_init(struct device * dev)205 static int __init r8a77970_cpg_mssr_init(struct device *dev)
206 {
207 	const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
208 	u32 cpg_mode;
209 	int error;
210 
211 	error = rcar_rst_read_mode_pins(&cpg_mode);
212 	if (error)
213 		return error;
214 
215 	spin_lock_init(&cpg_lock);
216 
217 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
218 
219 	return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
220 }
221 
r8a77970_cpg_clk_register(struct device * dev,const struct cpg_core_clk * core,const struct cpg_mssr_info * info,struct clk ** clks,void __iomem * base,struct raw_notifier_head * notifiers)222 static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
223 	const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
224 	struct clk **clks, void __iomem *base,
225 	struct raw_notifier_head *notifiers)
226 {
227 	const struct clk_div_table *table;
228 	const struct clk *parent;
229 	unsigned int shift;
230 
231 	switch (core->type) {
232 	case CLK_TYPE_R8A77970_SD0H:
233 		table = cpg_sd0h_div_table;
234 		shift = 8;
235 		break;
236 	case CLK_TYPE_R8A77970_SD0:
237 		table = cpg_sd0_div_table;
238 		shift = 4;
239 		break;
240 	default:
241 		return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
242 						  notifiers);
243 	}
244 
245 	parent = clks[core->parent];
246 	if (IS_ERR(parent))
247 		return ERR_CAST(parent);
248 
249 	return clk_register_divider_table(NULL, core->name,
250 					  __clk_get_name(parent), 0,
251 					  base + CPG_SD0CKCR,
252 					  shift, 4, 0, table, &cpg_lock);
253 }
254 
255 const struct cpg_mssr_info r8a77970_cpg_mssr_info __initconst = {
256 	/* Core Clocks */
257 	.core_clks = r8a77970_core_clks,
258 	.num_core_clks = ARRAY_SIZE(r8a77970_core_clks),
259 	.last_dt_core_clk = LAST_DT_CORE_CLK,
260 	.num_total_core_clks = MOD_CLK_BASE,
261 
262 	/* Module Clocks */
263 	.mod_clks = r8a77970_mod_clks,
264 	.num_mod_clks = ARRAY_SIZE(r8a77970_mod_clks),
265 	.num_hw_mod_clks = 12 * 32,
266 
267 	/* Critical Module Clocks */
268 	.crit_mod_clks = r8a77970_crit_mod_clks,
269 	.num_crit_mod_clks = ARRAY_SIZE(r8a77970_crit_mod_clks),
270 
271 	/* Callbacks */
272 	.init = r8a77970_cpg_mssr_init,
273 	.cpg_clk_register = r8a77970_cpg_clk_register,
274 };
275