xref: /openbmc/linux/drivers/clk/bcm/clk-cygnus.c (revision 52e6676e)
1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (C) 2014 Broadcom Corporation
3 
4 #include <linux/kernel.h>
5 #include <linux/err.h>
6 #include <linux/clk-provider.h>
7 #include <linux/io.h>
8 #include <linux/of.h>
9 #include <linux/clkdev.h>
10 #include <linux/of_address.h>
11 #include <linux/delay.h>
12 
13 #include <dt-bindings/clock/bcm-cygnus.h>
14 #include "clk-iproc.h"
15 
16 #define REG_VAL(o, s, w) { .offset = o, .shift = s, .width = w, }
17 
18 #define AON_VAL(o, pw, ps, is) { .offset = o, .pwr_width = pw, \
19 	.pwr_shift = ps, .iso_shift = is }
20 
21 #define SW_CTRL_VAL(o, s) { .offset = o, .shift = s, }
22 
23 #define ASIU_DIV_VAL(o, es, hs, hw, ls, lw) \
24 		{ .offset = o, .en_shift = es, .high_shift = hs, \
25 		.high_width = hw, .low_shift = ls, .low_width = lw }
26 
27 #define RESET_VAL(o, rs, prs) { .offset = o, .reset_shift = rs, \
28 	.p_reset_shift = prs }
29 
30 #define DF_VAL(o, kis, kiw, kps, kpw, kas, kaw) { .offset = o, .ki_shift = kis,\
31 	.ki_width = kiw, .kp_shift = kps, .kp_width = kpw, .ka_shift = kas,    \
32 	.ka_width = kaw }
33 
34 #define VCO_CTRL_VAL(uo, lo) { .u_offset = uo, .l_offset = lo }
35 
36 #define ENABLE_VAL(o, es, hs, bs) { .offset = o, .enable_shift = es, \
37 	.hold_shift = hs, .bypass_shift = bs }
38 
39 #define ASIU_GATE_VAL(o, es) { .offset = o, .en_shift = es }
40 
cygnus_armpll_init(struct device_node * node)41 static void __init cygnus_armpll_init(struct device_node *node)
42 {
43 	iproc_armpll_setup(node);
44 }
45 CLK_OF_DECLARE(cygnus_armpll, "brcm,cygnus-armpll", cygnus_armpll_init);
46 
47 static const struct iproc_pll_ctrl genpll = {
48 	.flags = IPROC_CLK_AON | IPROC_CLK_PLL_HAS_NDIV_FRAC |
49 		IPROC_CLK_PLL_NEEDS_SW_CFG,
50 	.aon = AON_VAL(0x0, 2, 1, 0),
51 	.reset = RESET_VAL(0x0, 11, 10),
52 	.dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 3),
53 	.sw_ctrl = SW_CTRL_VAL(0x10, 31),
54 	.ndiv_int = REG_VAL(0x10, 20, 10),
55 	.ndiv_frac = REG_VAL(0x10, 0, 20),
56 	.pdiv = REG_VAL(0x14, 0, 4),
57 	.vco_ctrl = VCO_CTRL_VAL(0x18, 0x1c),
58 	.status = REG_VAL(0x28, 12, 1),
59 };
60 
61 static const struct iproc_clk_ctrl genpll_clk[] = {
62 	[BCM_CYGNUS_GENPLL_AXI21_CLK] = {
63 		.channel = BCM_CYGNUS_GENPLL_AXI21_CLK,
64 		.flags = IPROC_CLK_AON,
65 		.enable = ENABLE_VAL(0x4, 6, 0, 12),
66 		.mdiv = REG_VAL(0x20, 0, 8),
67 	},
68 	[BCM_CYGNUS_GENPLL_250MHZ_CLK] = {
69 		.channel = BCM_CYGNUS_GENPLL_250MHZ_CLK,
70 		.flags = IPROC_CLK_AON,
71 		.enable = ENABLE_VAL(0x4, 7, 1, 13),
72 		.mdiv = REG_VAL(0x20, 10, 8),
73 	},
74 	[BCM_CYGNUS_GENPLL_IHOST_SYS_CLK] = {
75 		.channel = BCM_CYGNUS_GENPLL_IHOST_SYS_CLK,
76 		.flags = IPROC_CLK_AON,
77 		.enable = ENABLE_VAL(0x4, 8, 2, 14),
78 		.mdiv = REG_VAL(0x20, 20, 8),
79 	},
80 	[BCM_CYGNUS_GENPLL_ENET_SW_CLK] = {
81 		.channel = BCM_CYGNUS_GENPLL_ENET_SW_CLK,
82 		.flags = IPROC_CLK_AON,
83 		.enable = ENABLE_VAL(0x4, 9, 3, 15),
84 		.mdiv = REG_VAL(0x24, 0, 8),
85 	},
86 	[BCM_CYGNUS_GENPLL_AUDIO_125_CLK] = {
87 		.channel = BCM_CYGNUS_GENPLL_AUDIO_125_CLK,
88 		.flags = IPROC_CLK_AON,
89 		.enable = ENABLE_VAL(0x4, 10, 4, 16),
90 		.mdiv = REG_VAL(0x24, 10, 8),
91 	},
92 	[BCM_CYGNUS_GENPLL_CAN_CLK] = {
93 		.channel = BCM_CYGNUS_GENPLL_CAN_CLK,
94 		.flags = IPROC_CLK_AON,
95 		.enable = ENABLE_VAL(0x4, 11, 5, 17),
96 		.mdiv = REG_VAL(0x24, 20, 8),
97 	},
98 };
99 
cygnus_genpll_clk_init(struct device_node * node)100 static void __init cygnus_genpll_clk_init(struct device_node *node)
101 {
102 	iproc_pll_clk_setup(node, &genpll, NULL, 0, genpll_clk,
103 			    ARRAY_SIZE(genpll_clk));
104 }
105 CLK_OF_DECLARE(cygnus_genpll, "brcm,cygnus-genpll", cygnus_genpll_clk_init);
106 
107 static const struct iproc_pll_ctrl lcpll0 = {
108 	.flags = IPROC_CLK_AON | IPROC_CLK_PLL_NEEDS_SW_CFG,
109 	.aon = AON_VAL(0x0, 2, 5, 4),
110 	.reset = RESET_VAL(0x0, 31, 30),
111 	.dig_filter = DF_VAL(0x0, 27, 3, 23, 4, 19, 4),
112 	.sw_ctrl = SW_CTRL_VAL(0x4, 31),
113 	.ndiv_int = REG_VAL(0x4, 16, 10),
114 	.pdiv = REG_VAL(0x4, 26, 4),
115 	.vco_ctrl = VCO_CTRL_VAL(0x10, 0x14),
116 	.status = REG_VAL(0x18, 12, 1),
117 };
118 
119 static const struct iproc_clk_ctrl lcpll0_clk[] = {
120 	[BCM_CYGNUS_LCPLL0_PCIE_PHY_REF_CLK] = {
121 		.channel = BCM_CYGNUS_LCPLL0_PCIE_PHY_REF_CLK,
122 		.flags = IPROC_CLK_AON,
123 		.enable = ENABLE_VAL(0x0, 7, 1, 13),
124 		.mdiv = REG_VAL(0x8, 0, 8),
125 	},
126 	[BCM_CYGNUS_LCPLL0_DDR_PHY_CLK] = {
127 		.channel = BCM_CYGNUS_LCPLL0_DDR_PHY_CLK,
128 		.flags = IPROC_CLK_AON,
129 		.enable = ENABLE_VAL(0x0, 8, 2, 14),
130 		.mdiv = REG_VAL(0x8, 10, 8),
131 	},
132 	[BCM_CYGNUS_LCPLL0_SDIO_CLK] = {
133 		.channel = BCM_CYGNUS_LCPLL0_SDIO_CLK,
134 		.flags = IPROC_CLK_AON,
135 		.enable = ENABLE_VAL(0x0, 9, 3, 15),
136 		.mdiv = REG_VAL(0x8, 20, 8),
137 	},
138 	[BCM_CYGNUS_LCPLL0_USB_PHY_REF_CLK] = {
139 		.channel = BCM_CYGNUS_LCPLL0_USB_PHY_REF_CLK,
140 		.flags = IPROC_CLK_AON,
141 		.enable = ENABLE_VAL(0x0, 10, 4, 16),
142 		.mdiv = REG_VAL(0xc, 0, 8),
143 	},
144 	[BCM_CYGNUS_LCPLL0_SMART_CARD_CLK] = {
145 		.channel = BCM_CYGNUS_LCPLL0_SMART_CARD_CLK,
146 		.flags = IPROC_CLK_AON,
147 		.enable = ENABLE_VAL(0x0, 11, 5, 17),
148 		.mdiv = REG_VAL(0xc, 10, 8),
149 	},
150 	[BCM_CYGNUS_LCPLL0_CH5_UNUSED] = {
151 		.channel = BCM_CYGNUS_LCPLL0_CH5_UNUSED,
152 		.flags = IPROC_CLK_AON,
153 		.enable = ENABLE_VAL(0x0, 12, 6, 18),
154 		.mdiv = REG_VAL(0xc, 20, 8),
155 	},
156 };
157 
cygnus_lcpll0_clk_init(struct device_node * node)158 static void __init cygnus_lcpll0_clk_init(struct device_node *node)
159 {
160 	iproc_pll_clk_setup(node, &lcpll0, NULL, 0, lcpll0_clk,
161 			    ARRAY_SIZE(lcpll0_clk));
162 }
163 CLK_OF_DECLARE(cygnus_lcpll0, "brcm,cygnus-lcpll0", cygnus_lcpll0_clk_init);
164 
165 /*
166  * MIPI PLL VCO frequency parameter table
167  */
168 static const struct iproc_pll_vco_param mipipll_vco_params[] = {
169 	/* rate (Hz) ndiv_int ndiv_frac pdiv */
170 	{ 750000000UL,   30,     0,        1 },
171 	{ 1000000000UL,  40,     0,        1 },
172 	{ 1350000000ul,  54,     0,        1 },
173 	{ 2000000000UL,  80,     0,        1 },
174 	{ 2100000000UL,  84,     0,        1 },
175 	{ 2250000000UL,  90,     0,        1 },
176 	{ 2500000000UL,  100,    0,        1 },
177 	{ 2700000000UL,  54,     0,        0 },
178 	{ 2975000000UL,  119,    0,        1 },
179 	{ 3100000000UL,  124,    0,        1 },
180 	{ 3150000000UL,  126,    0,        1 },
181 };
182 
183 static const struct iproc_pll_ctrl mipipll = {
184 	.flags = IPROC_CLK_PLL_ASIU | IPROC_CLK_PLL_HAS_NDIV_FRAC |
185 		 IPROC_CLK_NEEDS_READ_BACK,
186 	.aon = AON_VAL(0x0, 4, 17, 16),
187 	.asiu = ASIU_GATE_VAL(0x0, 3),
188 	.reset = RESET_VAL(0x0, 11, 10),
189 	.dig_filter = DF_VAL(0x0, 4, 3, 0, 4, 7, 4),
190 	.ndiv_int = REG_VAL(0x10, 20, 10),
191 	.ndiv_frac = REG_VAL(0x10, 0, 20),
192 	.pdiv = REG_VAL(0x14, 0, 4),
193 	.vco_ctrl = VCO_CTRL_VAL(0x18, 0x1c),
194 	.status = REG_VAL(0x28, 12, 1),
195 };
196 
197 static const struct iproc_clk_ctrl mipipll_clk[] = {
198 	[BCM_CYGNUS_MIPIPLL_CH0_UNUSED] = {
199 		.channel = BCM_CYGNUS_MIPIPLL_CH0_UNUSED,
200 		.flags = IPROC_CLK_NEEDS_READ_BACK,
201 		.enable = ENABLE_VAL(0x4, 12, 6, 18),
202 		.mdiv = REG_VAL(0x20, 0, 8),
203 	},
204 	[BCM_CYGNUS_MIPIPLL_CH1_LCD] = {
205 		.channel = BCM_CYGNUS_MIPIPLL_CH1_LCD,
206 		.flags = IPROC_CLK_NEEDS_READ_BACK,
207 		.enable = ENABLE_VAL(0x4, 13, 7, 19),
208 		.mdiv = REG_VAL(0x20, 10, 8),
209 	},
210 	[BCM_CYGNUS_MIPIPLL_CH2_V3D] = {
211 		.channel = BCM_CYGNUS_MIPIPLL_CH2_V3D,
212 		.flags = IPROC_CLK_NEEDS_READ_BACK,
213 		.enable = ENABLE_VAL(0x4, 14, 8, 20),
214 		.mdiv = REG_VAL(0x20, 20, 8),
215 	},
216 	[BCM_CYGNUS_MIPIPLL_CH3_UNUSED] = {
217 		.channel = BCM_CYGNUS_MIPIPLL_CH3_UNUSED,
218 		.flags = IPROC_CLK_NEEDS_READ_BACK,
219 		.enable = ENABLE_VAL(0x4, 15, 9, 21),
220 		.mdiv = REG_VAL(0x24, 0, 8),
221 	},
222 	[BCM_CYGNUS_MIPIPLL_CH4_UNUSED] = {
223 		.channel = BCM_CYGNUS_MIPIPLL_CH4_UNUSED,
224 		.flags = IPROC_CLK_NEEDS_READ_BACK,
225 		.enable = ENABLE_VAL(0x4, 16, 10, 22),
226 		.mdiv = REG_VAL(0x24, 10, 8),
227 	},
228 	[BCM_CYGNUS_MIPIPLL_CH5_UNUSED] = {
229 		.channel = BCM_CYGNUS_MIPIPLL_CH5_UNUSED,
230 		.flags = IPROC_CLK_NEEDS_READ_BACK,
231 		.enable = ENABLE_VAL(0x4, 17, 11, 23),
232 		.mdiv = REG_VAL(0x24, 20, 8),
233 	},
234 };
235 
cygnus_mipipll_clk_init(struct device_node * node)236 static void __init cygnus_mipipll_clk_init(struct device_node *node)
237 {
238 	iproc_pll_clk_setup(node, &mipipll, mipipll_vco_params,
239 			    ARRAY_SIZE(mipipll_vco_params), mipipll_clk,
240 			    ARRAY_SIZE(mipipll_clk));
241 }
242 CLK_OF_DECLARE(cygnus_mipipll, "brcm,cygnus-mipipll", cygnus_mipipll_clk_init);
243 
244 static const struct iproc_asiu_div asiu_div[] = {
245 	[BCM_CYGNUS_ASIU_KEYPAD_CLK] = ASIU_DIV_VAL(0x0, 31, 16, 10, 0, 10),
246 	[BCM_CYGNUS_ASIU_ADC_CLK] = ASIU_DIV_VAL(0x4, 31, 16, 10, 0, 10),
247 	[BCM_CYGNUS_ASIU_PWM_CLK] = ASIU_DIV_VAL(0x8, 31, 16, 10, 0, 10),
248 };
249 
250 static const struct iproc_asiu_gate asiu_gate[] = {
251 	[BCM_CYGNUS_ASIU_KEYPAD_CLK] = ASIU_GATE_VAL(0x0, 7),
252 	[BCM_CYGNUS_ASIU_ADC_CLK] = ASIU_GATE_VAL(0x0, 9),
253 	[BCM_CYGNUS_ASIU_PWM_CLK] = ASIU_GATE_VAL(IPROC_CLK_INVALID_OFFSET, 0),
254 };
255 
cygnus_asiu_init(struct device_node * node)256 static void __init cygnus_asiu_init(struct device_node *node)
257 {
258 	iproc_asiu_setup(node, asiu_div, asiu_gate, ARRAY_SIZE(asiu_div));
259 }
260 CLK_OF_DECLARE(cygnus_asiu_clk, "brcm,cygnus-asiu-clk", cygnus_asiu_init);
261 
262 static const struct iproc_pll_ctrl audiopll = {
263 	.flags = IPROC_CLK_PLL_NEEDS_SW_CFG | IPROC_CLK_PLL_HAS_NDIV_FRAC |
264 		IPROC_CLK_PLL_USER_MODE_ON | IPROC_CLK_PLL_RESET_ACTIVE_LOW |
265 		IPROC_CLK_PLL_CALC_PARAM,
266 	.reset = RESET_VAL(0x5c, 0, 1),
267 	.dig_filter = DF_VAL(0x48, 0, 3, 6, 4, 3, 3),
268 	.sw_ctrl = SW_CTRL_VAL(0x4, 0),
269 	.ndiv_int = REG_VAL(0x8, 0, 10),
270 	.ndiv_frac = REG_VAL(0x8, 10, 20),
271 	.pdiv = REG_VAL(0x44, 0, 4),
272 	.vco_ctrl = VCO_CTRL_VAL(0x0c, 0x10),
273 	.status = REG_VAL(0x54, 0, 1),
274 	.macro_mode = REG_VAL(0x0, 0, 3),
275 };
276 
277 static const struct iproc_clk_ctrl audiopll_clk[] = {
278 	[BCM_CYGNUS_AUDIOPLL_CH0] = {
279 		.channel = BCM_CYGNUS_AUDIOPLL_CH0,
280 		.flags = IPROC_CLK_AON | IPROC_CLK_MCLK_DIV_BY_2,
281 		.enable = ENABLE_VAL(0x14, 8, 10, 9),
282 		.mdiv = REG_VAL(0x14, 0, 8),
283 	},
284 	[BCM_CYGNUS_AUDIOPLL_CH1] = {
285 		.channel = BCM_CYGNUS_AUDIOPLL_CH1,
286 		.flags = IPROC_CLK_AON,
287 		.enable = ENABLE_VAL(0x18, 8, 10, 9),
288 		.mdiv = REG_VAL(0x18, 0, 8),
289 	},
290 	[BCM_CYGNUS_AUDIOPLL_CH2] = {
291 		.channel = BCM_CYGNUS_AUDIOPLL_CH2,
292 		.flags = IPROC_CLK_AON,
293 		.enable = ENABLE_VAL(0x1c, 8, 10, 9),
294 		.mdiv = REG_VAL(0x1c, 0, 8),
295 	},
296 };
297 
cygnus_audiopll_clk_init(struct device_node * node)298 static void __init cygnus_audiopll_clk_init(struct device_node *node)
299 {
300 	iproc_pll_clk_setup(node, &audiopll, NULL, 0,
301 			    audiopll_clk,  ARRAY_SIZE(audiopll_clk));
302 }
303 CLK_OF_DECLARE(cygnus_audiopll, "brcm,cygnus-audiopll",
304 			cygnus_audiopll_clk_init);
305