1 /*
2  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
3  * Author: Tarek Dakhran <t.dakhran@samsung.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * Common Clock Framework support for Exynos5410 SoC.
10 */
11 
12 #include <dt-bindings/clock/exynos5410.h>
13 
14 #include <linux/clk-provider.h>
15 #include <linux/of.h>
16 #include <linux/of_address.h>
17 #include <linux/clk.h>
18 
19 #include "clk.h"
20 
21 #define APLL_LOCK               0x0
22 #define APLL_CON0               0x100
23 #define CPLL_LOCK               0x10020
24 #define CPLL_CON0               0x10120
25 #define EPLL_LOCK               0x10040
26 #define EPLL_CON0               0x10130
27 #define MPLL_LOCK               0x4000
28 #define MPLL_CON0               0x4100
29 #define BPLL_LOCK               0x20010
30 #define BPLL_CON0               0x20110
31 #define KPLL_LOCK               0x28000
32 #define KPLL_CON0               0x28100
33 
34 #define SRC_CPU			0x200
35 #define DIV_CPU0		0x500
36 #define SRC_CPERI1		0x4204
37 #define GATE_IP_G2D		0x8800
38 #define DIV_TOP0		0x10510
39 #define DIV_TOP1		0x10514
40 #define DIV_FSYS0		0x10548
41 #define DIV_FSYS1		0x1054c
42 #define DIV_FSYS2		0x10550
43 #define DIV_PERIC0		0x10558
44 #define DIV_PERIC3		0x10564
45 #define SRC_TOP0		0x10210
46 #define SRC_TOP1		0x10214
47 #define SRC_TOP2		0x10218
48 #define SRC_FSYS		0x10244
49 #define SRC_PERIC0		0x10250
50 #define SRC_MASK_FSYS		0x10340
51 #define SRC_MASK_PERIC0		0x10350
52 #define GATE_BUS_FSYS0		0x10740
53 #define GATE_TOP_SCLK_FSYS	0x10840
54 #define GATE_TOP_SCLK_PERIC	0x10850
55 #define GATE_IP_FSYS		0x10944
56 #define GATE_IP_PERIC		0x10950
57 #define GATE_IP_PERIS		0x10960
58 #define SRC_CDREX		0x20200
59 #define SRC_KFC			0x28200
60 #define DIV_KFC0		0x28500
61 
62 /* list of PLLs */
63 enum exynos5410_plls {
64 	apll, cpll, epll, mpll,
65 	bpll, kpll,
66 	nr_plls                 /* number of PLLs */
67 };
68 
69 /* list of all parent clocks */
70 PNAME(apll_p)		= { "fin_pll", "fout_apll", };
71 PNAME(bpll_p)		= { "fin_pll", "fout_bpll", };
72 PNAME(cpll_p)		= { "fin_pll", "fout_cpll" };
73 PNAME(epll_p)		= { "fin_pll", "fout_epll" };
74 PNAME(mpll_p)		= { "fin_pll", "fout_mpll", };
75 PNAME(kpll_p)		= { "fin_pll", "fout_kpll", };
76 
77 PNAME(mout_cpu_p)	= { "mout_apll", "sclk_mpll", };
78 PNAME(mout_kfc_p)	= { "mout_kpll", "sclk_mpll", };
79 
80 PNAME(mpll_user_p)	= { "fin_pll", "sclk_mpll", };
81 PNAME(bpll_user_p)	= { "fin_pll", "sclk_bpll", };
82 PNAME(mpll_bpll_p)	= { "sclk_mpll_muxed", "sclk_bpll_muxed", };
83 PNAME(sclk_mpll_bpll_p)	= { "sclk_mpll_bpll", "fin_pll", };
84 
85 PNAME(group2_p)		= { "fin_pll", "fin_pll", "none", "none",
86 			"none", "none", "sclk_mpll_bpll",
87 			 "none", "none", "sclk_cpll" };
88 
89 static const struct samsung_mux_clock exynos5410_mux_clks[] __initconst = {
90 	MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
91 	MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
92 
93 	MUX(0, "mout_kpll", kpll_p, SRC_KFC, 0, 1),
94 	MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
95 
96 	MUX(0, "sclk_mpll", mpll_p, SRC_CPERI1, 8, 1),
97 	MUX(0, "sclk_mpll_muxed", mpll_user_p, SRC_TOP2, 20, 1),
98 
99 	MUX(0, "sclk_bpll", bpll_p, SRC_CDREX, 0, 1),
100 	MUX(0, "sclk_bpll_muxed", bpll_user_p, SRC_TOP2, 24, 1),
101 
102 	MUX(0, "sclk_epll", epll_p, SRC_TOP2, 12, 1),
103 
104 	MUX(0, "sclk_cpll", cpll_p, SRC_TOP2, 8, 1),
105 
106 	MUX(0, "sclk_mpll_bpll", mpll_bpll_p, SRC_TOP1, 20, 1),
107 
108 	MUX(0, "mout_mmc0", group2_p, SRC_FSYS, 0, 4),
109 	MUX(0, "mout_mmc1", group2_p, SRC_FSYS, 4, 4),
110 	MUX(0, "mout_mmc2", group2_p, SRC_FSYS, 8, 4),
111 	MUX(0, "mout_usbd300", sclk_mpll_bpll_p, SRC_FSYS, 28, 1),
112 	MUX(0, "mout_usbd301", sclk_mpll_bpll_p, SRC_FSYS, 29, 1),
113 
114 	MUX(0, "mout_uart0", group2_p, SRC_PERIC0, 0, 4),
115 	MUX(0, "mout_uart1", group2_p, SRC_PERIC0, 4, 4),
116 	MUX(0, "mout_uart2", group2_p, SRC_PERIC0, 8, 4),
117 	MUX(0, "mout_uart3", group2_p, SRC_PERIC0, 12, 4),
118 	MUX(0, "mout_pwm", group2_p, SRC_PERIC0, 24, 4),
119 
120 	MUX(0, "mout_aclk200", mpll_bpll_p, SRC_TOP0, 12, 1),
121 	MUX(0, "mout_aclk400", mpll_bpll_p, SRC_TOP0, 20, 1),
122 };
123 
124 static const struct samsung_div_clock exynos5410_div_clks[] __initconst = {
125 	DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
126 	DIV(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3),
127 
128 	DIV(0, "div_acp", "div_arm2", DIV_CPU0, 8, 3),
129 	DIV(0, "div_cpud", "div_arm2", DIV_CPU0, 4, 3),
130 	DIV(0, "div_atb", "div_arm2", DIV_CPU0, 16, 3),
131 	DIV(0, "pclk_dbg", "div_arm2", DIV_CPU0, 20, 3),
132 
133 	DIV(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3),
134 	DIV(0, "div_aclk", "div_kfc", DIV_KFC0, 4, 3),
135 	DIV(0, "div_pclk", "div_kfc", DIV_KFC0, 20, 3),
136 
137 	DIV(0, "aclk66_pre", "sclk_mpll_muxed", DIV_TOP1, 24, 3),
138 	DIV(0, "aclk66", "aclk66_pre", DIV_TOP0, 0, 3),
139 
140 	DIV(0, "dout_usbphy300", "mout_usbd300", DIV_FSYS0, 16, 4),
141 	DIV(0, "dout_usbphy301", "mout_usbd301", DIV_FSYS0, 20, 4),
142 	DIV(0, "dout_usbd300", "mout_usbd300", DIV_FSYS0, 24, 4),
143 	DIV(0, "dout_usbd301", "mout_usbd301", DIV_FSYS0, 28, 4),
144 
145 	DIV(0, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
146 	DIV(0, "div_mmc1", "mout_mmc1", DIV_FSYS1, 16, 4),
147 	DIV(0, "div_mmc2", "mout_mmc2", DIV_FSYS2, 0, 4),
148 
149 	DIV_F(0, "div_mmc_pre0", "div_mmc0",
150 			DIV_FSYS1, 8, 8, CLK_SET_RATE_PARENT, 0),
151 	DIV_F(0, "div_mmc_pre1", "div_mmc1",
152 			DIV_FSYS1, 24, 8, CLK_SET_RATE_PARENT, 0),
153 	DIV_F(0, "div_mmc_pre2", "div_mmc2",
154 			DIV_FSYS2, 8, 8, CLK_SET_RATE_PARENT, 0),
155 
156 	DIV(0, "div_uart0", "mout_uart0", DIV_PERIC0, 0, 4),
157 	DIV(0, "div_uart1", "mout_uart1", DIV_PERIC0, 4, 4),
158 	DIV(0, "div_uart2", "mout_uart2", DIV_PERIC0, 8, 4),
159 	DIV(0, "div_uart3", "mout_uart3", DIV_PERIC0, 12, 4),
160 
161 	DIV(0, "dout_pwm", "mout_pwm", DIV_PERIC3, 0, 4),
162 
163 	DIV(0, "aclk200", "mout_aclk200", DIV_TOP0, 12, 3),
164 	DIV(0, "aclk266", "mpll_user_p", DIV_TOP0, 16, 3),
165 	DIV(0, "aclk400", "mout_aclk400", DIV_TOP0, 24, 3),
166 };
167 
168 static const struct samsung_gate_clock exynos5410_gate_clks[] __initconst = {
169 	GATE(CLK_SSS, "sss", "aclk266", GATE_IP_G2D, 2, 0, 0),
170 	GATE(CLK_MCT, "mct", "aclk66", GATE_IP_PERIS, 18, 0, 0),
171 	GATE(CLK_WDT, "wdt", "aclk66", GATE_IP_PERIS, 19, 0, 0),
172 	GATE(CLK_RTC, "rtc", "aclk66", GATE_IP_PERIS, 20, 0, 0),
173 	GATE(CLK_TMU, "tmu", "aclk66", GATE_IP_PERIS, 21, 0, 0),
174 
175 	GATE(CLK_SCLK_MMC0, "sclk_mmc0", "div_mmc_pre0",
176 			SRC_MASK_FSYS, 0, CLK_SET_RATE_PARENT, 0),
177 	GATE(CLK_SCLK_MMC1, "sclk_mmc1", "div_mmc_pre1",
178 			SRC_MASK_FSYS, 4, CLK_SET_RATE_PARENT, 0),
179 	GATE(CLK_SCLK_MMC2, "sclk_mmc2", "div_mmc_pre2",
180 			SRC_MASK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
181 
182 	GATE(CLK_MMC0, "sdmmc0", "aclk200", GATE_BUS_FSYS0, 12, 0, 0),
183 	GATE(CLK_MMC1, "sdmmc1", "aclk200", GATE_BUS_FSYS0, 13, 0, 0),
184 	GATE(CLK_MMC2, "sdmmc2", "aclk200", GATE_BUS_FSYS0, 14, 0, 0),
185 	GATE(CLK_PDMA1, "pdma1", "aclk200", GATE_BUS_FSYS0, 2, 0, 0),
186 	GATE(CLK_PDMA0, "pdma0", "aclk200", GATE_BUS_FSYS0, 1, 0, 0),
187 
188 	GATE(CLK_SCLK_USBPHY301, "sclk_usbphy301", "dout_usbphy301",
189 	     GATE_TOP_SCLK_FSYS, 7, CLK_SET_RATE_PARENT, 0),
190 	GATE(CLK_SCLK_USBPHY300, "sclk_usbphy300", "dout_usbphy300",
191 	     GATE_TOP_SCLK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
192 	GATE(CLK_SCLK_USBD300, "sclk_usbd300", "dout_usbd300",
193 	     GATE_TOP_SCLK_FSYS, 9, CLK_SET_RATE_PARENT, 0),
194 	GATE(CLK_SCLK_USBD301, "sclk_usbd301", "dout_usbd301",
195 	     GATE_TOP_SCLK_FSYS, 10, CLK_SET_RATE_PARENT, 0),
196 
197 	GATE(CLK_SCLK_PWM, "sclk_pwm", "dout_pwm",
198 	     GATE_TOP_SCLK_PERIC, 11, CLK_SET_RATE_PARENT, 0),
199 
200 	GATE(CLK_UART0, "uart0", "aclk66", GATE_IP_PERIC, 0, 0, 0),
201 	GATE(CLK_UART1, "uart1", "aclk66", GATE_IP_PERIC, 1, 0, 0),
202 	GATE(CLK_UART2, "uart2", "aclk66", GATE_IP_PERIC, 2, 0, 0),
203 	GATE(CLK_UART3, "uart3", "aclk66", GATE_IP_PERIC, 3, 0, 0),
204 	GATE(CLK_I2C0, "i2c0", "aclk66", GATE_IP_PERIC, 6, 0, 0),
205 	GATE(CLK_I2C1, "i2c1", "aclk66", GATE_IP_PERIC, 7, 0, 0),
206 	GATE(CLK_I2C2, "i2c2", "aclk66", GATE_IP_PERIC, 8, 0, 0),
207 	GATE(CLK_I2C3, "i2c3", "aclk66", GATE_IP_PERIC, 9, 0, 0),
208 	GATE(CLK_USI0, "usi0", "aclk66", GATE_IP_PERIC, 10, 0, 0),
209 	GATE(CLK_USI1, "usi1", "aclk66", GATE_IP_PERIC, 11, 0, 0),
210 	GATE(CLK_USI2, "usi2", "aclk66", GATE_IP_PERIC, 12, 0, 0),
211 	GATE(CLK_USI3, "usi3", "aclk66", GATE_IP_PERIC, 13, 0, 0),
212 	GATE(CLK_PWM, "pwm", "aclk66", GATE_IP_PERIC, 24, 0, 0),
213 
214 	GATE(CLK_SCLK_UART0, "sclk_uart0", "div_uart0",
215 			SRC_MASK_PERIC0, 0, CLK_SET_RATE_PARENT, 0),
216 	GATE(CLK_SCLK_UART1, "sclk_uart1", "div_uart1",
217 			SRC_MASK_PERIC0, 4, CLK_SET_RATE_PARENT, 0),
218 	GATE(CLK_SCLK_UART2, "sclk_uart2", "div_uart2",
219 			SRC_MASK_PERIC0, 8, CLK_SET_RATE_PARENT, 0),
220 	GATE(CLK_SCLK_UART3, "sclk_uart3", "div_uart3",
221 			SRC_MASK_PERIC0, 12, CLK_SET_RATE_PARENT, 0),
222 
223 	GATE(CLK_USBH20, "usbh20", "aclk200_fsys", GATE_IP_FSYS, 18, 0, 0),
224 	GATE(CLK_USBD300, "usbd300", "aclk200_fsys", GATE_IP_FSYS, 19, 0, 0),
225 	GATE(CLK_USBD301, "usbd301", "aclk200_fsys", GATE_IP_FSYS, 20, 0, 0),
226 };
227 
228 static const struct samsung_pll_rate_table exynos5410_pll2550x_24mhz_tbl[] __initconst = {
229 	PLL_36XX_RATE(24 * MHZ, 400000000U, 200, 3, 2, 0),
230 	PLL_36XX_RATE(24 * MHZ, 333000000U, 111, 2, 2, 0),
231 	PLL_36XX_RATE(24 * MHZ, 300000000U, 100, 2, 2, 0),
232 	PLL_36XX_RATE(24 * MHZ, 266000000U, 266, 3, 3, 0),
233 	PLL_36XX_RATE(24 * MHZ, 200000000U, 200, 3, 3, 0),
234 	PLL_36XX_RATE(24 * MHZ, 192000000U, 192, 3, 3, 0),
235 	PLL_36XX_RATE(24 * MHZ, 166000000U, 166, 3, 3, 0),
236 	PLL_36XX_RATE(24 * MHZ, 133000000U, 266, 3, 4, 0),
237 	PLL_36XX_RATE(24 * MHZ, 100000000U, 200, 3, 4, 0),
238 	PLL_36XX_RATE(24 * MHZ, 66000000U,  176, 2, 5, 0),
239 };
240 
241 static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
242 	[apll] = PLL(pll_35xx, CLK_FOUT_APLL, "fout_apll", "fin_pll", APLL_LOCK,
243 		APLL_CON0, NULL),
244 	[cpll] = PLL(pll_35xx, CLK_FOUT_CPLL, "fout_cpll", "fin_pll", CPLL_LOCK,
245 		CPLL_CON0, NULL),
246 	[epll] = PLL(pll_2650x, CLK_FOUT_EPLL, "fout_epll", "fin_pll", EPLL_LOCK,
247 		EPLL_CON0, NULL),
248 	[mpll] = PLL(pll_35xx, CLK_FOUT_MPLL, "fout_mpll", "fin_pll", MPLL_LOCK,
249 		MPLL_CON0, NULL),
250 	[bpll] = PLL(pll_35xx, CLK_FOUT_BPLL, "fout_bpll", "fin_pll", BPLL_LOCK,
251 		BPLL_CON0, NULL),
252 	[kpll] = PLL(pll_35xx, CLK_FOUT_KPLL, "fout_kpll", "fin_pll", KPLL_LOCK,
253 		KPLL_CON0, NULL),
254 };
255 
256 static const struct samsung_cmu_info cmu __initconst = {
257 	.pll_clks	= exynos5410_plls,
258 	.nr_pll_clks	= ARRAY_SIZE(exynos5410_plls),
259 	.mux_clks	= exynos5410_mux_clks,
260 	.nr_mux_clks	= ARRAY_SIZE(exynos5410_mux_clks),
261 	.div_clks	= exynos5410_div_clks,
262 	.nr_div_clks	= ARRAY_SIZE(exynos5410_div_clks),
263 	.gate_clks	= exynos5410_gate_clks,
264 	.nr_gate_clks	= ARRAY_SIZE(exynos5410_gate_clks),
265 	.nr_clk_ids	= CLK_NR_CLKS,
266 };
267 
268 /* register exynos5410 clocks */
269 static void __init exynos5410_clk_init(struct device_node *np)
270 {
271 	struct clk *xxti = of_clk_get(np, 0);
272 
273 	if (!IS_ERR(xxti) && clk_get_rate(xxti) == 24 * MHZ)
274 		exynos5410_plls[epll].rate_table = exynos5410_pll2550x_24mhz_tbl;
275 
276 	samsung_cmu_register_one(np, &cmu);
277 
278 	pr_debug("Exynos5410: clock setup completed.\n");
279 }
280 CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);
281