1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2017 Icenowy Zheng <icenowy@aosc.xyz>
4 */
5
6 #include <linux/clk-provider.h>
7 #include <linux/of_address.h>
8 #include <linux/platform_device.h>
9
10 #include "ccu_common.h"
11 #include "ccu_reset.h"
12
13 #include "ccu_div.h"
14 #include "ccu_gate.h"
15 #include "ccu_mp.h"
16 #include "ccu_nm.h"
17
18 #include "ccu-sun50i-h6-r.h"
19
20 /*
21 * Information about AR100 and AHB/APB clocks in R_CCU are gathered from
22 * clock definitions in the BSP source code.
23 */
24
25 static const char * const ar100_r_apb2_parents[] = { "osc24M", "osc32k",
26 "iosc", "pll-periph0" };
27 static const struct ccu_mux_var_prediv ar100_r_apb2_predivs[] = {
28 { .index = 3, .shift = 0, .width = 5 },
29 };
30
31 static struct ccu_div ar100_clk = {
32 .div = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
33
34 .mux = {
35 .shift = 24,
36 .width = 2,
37
38 .var_predivs = ar100_r_apb2_predivs,
39 .n_var_predivs = ARRAY_SIZE(ar100_r_apb2_predivs),
40 },
41
42 .common = {
43 .reg = 0x000,
44 .features = CCU_FEATURE_VARIABLE_PREDIV,
45 .hw.init = CLK_HW_INIT_PARENTS("ar100",
46 ar100_r_apb2_parents,
47 &ccu_div_ops,
48 0),
49 },
50 };
51
52 static CLK_FIXED_FACTOR_HW(r_ahb_clk, "r-ahb", &ar100_clk.common.hw, 1, 1, 0);
53
54 static SUNXI_CCU_M(r_apb1_clk, "r-apb1", "r-ahb", 0x00c, 0, 2, 0);
55
56 static struct ccu_div r_apb2_clk = {
57 .div = _SUNXI_CCU_DIV_FLAGS(8, 2, CLK_DIVIDER_POWER_OF_TWO),
58
59 .mux = {
60 .shift = 24,
61 .width = 2,
62
63 .var_predivs = ar100_r_apb2_predivs,
64 .n_var_predivs = ARRAY_SIZE(ar100_r_apb2_predivs),
65 },
66
67 .common = {
68 .reg = 0x010,
69 .features = CCU_FEATURE_VARIABLE_PREDIV,
70 .hw.init = CLK_HW_INIT_PARENTS("r-apb2",
71 ar100_r_apb2_parents,
72 &ccu_div_ops,
73 0),
74 },
75 };
76
77 /*
78 * Information about the gate/resets are gathered from the clock header file
79 * in the BSP source code, although most of them are unused. The existence
80 * of the hardware block is verified with "3.1 Memory Mapping" chapter in
81 * "Allwinner H6 V200 User Manual V1.1"; and the parent APB buses are verified
82 * with "3.3.2.1 System Bus Tree" chapter inthe same document.
83 */
84 static SUNXI_CCU_GATE(r_apb1_timer_clk, "r-apb1-timer", "r-apb1",
85 0x11c, BIT(0), 0);
86 static SUNXI_CCU_GATE(r_apb1_twd_clk, "r-apb1-twd", "r-apb1",
87 0x12c, BIT(0), 0);
88 static SUNXI_CCU_GATE(r_apb1_pwm_clk, "r-apb1-pwm", "r-apb1",
89 0x13c, BIT(0), 0);
90 static SUNXI_CCU_GATE(r_apb2_uart_clk, "r-apb2-uart", "r-apb2",
91 0x18c, BIT(0), 0);
92 static SUNXI_CCU_GATE(r_apb2_i2c_clk, "r-apb2-i2c", "r-apb2",
93 0x19c, BIT(0), 0);
94 static SUNXI_CCU_GATE(r_apb2_rsb_clk, "r-apb2-rsb", "r-apb2",
95 0x1bc, BIT(0), 0);
96 static SUNXI_CCU_GATE(r_apb1_ir_clk, "r-apb1-ir", "r-apb1",
97 0x1cc, BIT(0), 0);
98 static SUNXI_CCU_GATE(r_apb1_w1_clk, "r-apb1-w1", "r-apb1",
99 0x1ec, BIT(0), 0);
100
101 /* Information of IR(RX) mod clock is gathered from BSP source code */
102 static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" };
103 static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
104 r_mod0_default_parents, 0x1c0,
105 0, 5, /* M */
106 8, 2, /* P */
107 24, 1, /* mux */
108 BIT(31), /* gate */
109 0);
110
111 /*
112 * BSP didn't use the 1-wire function at all now, and the information about
113 * this mod clock is guessed from the IR mod clock above. The existence of
114 * this mod clock is proven by BSP clock header, and the dividers are verified
115 * by contents in the 1-wire related chapter of the User Manual.
116 */
117
118 static SUNXI_CCU_MP_WITH_MUX_GATE(w1_clk, "w1",
119 r_mod0_default_parents, 0x1e0,
120 0, 5, /* M */
121 8, 2, /* P */
122 24, 1, /* mux */
123 BIT(31), /* gate */
124 0);
125
126 static struct ccu_common *sun50i_h6_r_ccu_clks[] = {
127 &ar100_clk.common,
128 &r_apb1_clk.common,
129 &r_apb2_clk.common,
130 &r_apb1_timer_clk.common,
131 &r_apb1_twd_clk.common,
132 &r_apb1_pwm_clk.common,
133 &r_apb2_uart_clk.common,
134 &r_apb2_i2c_clk.common,
135 &r_apb2_rsb_clk.common,
136 &r_apb1_ir_clk.common,
137 &r_apb1_w1_clk.common,
138 &ir_clk.common,
139 &w1_clk.common,
140 };
141
142 static struct ccu_common *sun50i_h616_r_ccu_clks[] = {
143 &r_apb1_clk.common,
144 &r_apb2_clk.common,
145 &r_apb1_twd_clk.common,
146 &r_apb2_i2c_clk.common,
147 &r_apb2_rsb_clk.common,
148 &r_apb1_ir_clk.common,
149 &ir_clk.common,
150 };
151
152 static struct clk_hw_onecell_data sun50i_h6_r_hw_clks = {
153 .hws = {
154 [CLK_AR100] = &ar100_clk.common.hw,
155 [CLK_R_AHB] = &r_ahb_clk.hw,
156 [CLK_R_APB1] = &r_apb1_clk.common.hw,
157 [CLK_R_APB2] = &r_apb2_clk.common.hw,
158 [CLK_R_APB1_TIMER] = &r_apb1_timer_clk.common.hw,
159 [CLK_R_APB1_TWD] = &r_apb1_twd_clk.common.hw,
160 [CLK_R_APB1_PWM] = &r_apb1_pwm_clk.common.hw,
161 [CLK_R_APB2_UART] = &r_apb2_uart_clk.common.hw,
162 [CLK_R_APB2_I2C] = &r_apb2_i2c_clk.common.hw,
163 [CLK_R_APB2_RSB] = &r_apb2_rsb_clk.common.hw,
164 [CLK_R_APB1_IR] = &r_apb1_ir_clk.common.hw,
165 [CLK_R_APB1_W1] = &r_apb1_w1_clk.common.hw,
166 [CLK_IR] = &ir_clk.common.hw,
167 [CLK_W1] = &w1_clk.common.hw,
168 },
169 .num = CLK_NUMBER,
170 };
171
172 static struct clk_hw_onecell_data sun50i_h616_r_hw_clks = {
173 .hws = {
174 [CLK_R_AHB] = &r_ahb_clk.hw,
175 [CLK_R_APB1] = &r_apb1_clk.common.hw,
176 [CLK_R_APB2] = &r_apb2_clk.common.hw,
177 [CLK_R_APB1_TWD] = &r_apb1_twd_clk.common.hw,
178 [CLK_R_APB2_I2C] = &r_apb2_i2c_clk.common.hw,
179 [CLK_R_APB2_RSB] = &r_apb2_rsb_clk.common.hw,
180 [CLK_R_APB1_IR] = &r_apb1_ir_clk.common.hw,
181 [CLK_IR] = &ir_clk.common.hw,
182 },
183 .num = CLK_NUMBER,
184 };
185
186 static struct ccu_reset_map sun50i_h6_r_ccu_resets[] = {
187 [RST_R_APB1_TIMER] = { 0x11c, BIT(16) },
188 [RST_R_APB1_TWD] = { 0x12c, BIT(16) },
189 [RST_R_APB1_PWM] = { 0x13c, BIT(16) },
190 [RST_R_APB2_UART] = { 0x18c, BIT(16) },
191 [RST_R_APB2_I2C] = { 0x19c, BIT(16) },
192 [RST_R_APB2_RSB] = { 0x1bc, BIT(16) },
193 [RST_R_APB1_IR] = { 0x1cc, BIT(16) },
194 [RST_R_APB1_W1] = { 0x1ec, BIT(16) },
195 };
196
197 static struct ccu_reset_map sun50i_h616_r_ccu_resets[] = {
198 [RST_R_APB1_TWD] = { 0x12c, BIT(16) },
199 [RST_R_APB2_I2C] = { 0x19c, BIT(16) },
200 [RST_R_APB2_RSB] = { 0x1bc, BIT(16) },
201 [RST_R_APB1_IR] = { 0x1cc, BIT(16) },
202 };
203
204 static const struct sunxi_ccu_desc sun50i_h6_r_ccu_desc = {
205 .ccu_clks = sun50i_h6_r_ccu_clks,
206 .num_ccu_clks = ARRAY_SIZE(sun50i_h6_r_ccu_clks),
207
208 .hw_clks = &sun50i_h6_r_hw_clks,
209
210 .resets = sun50i_h6_r_ccu_resets,
211 .num_resets = ARRAY_SIZE(sun50i_h6_r_ccu_resets),
212 };
213
214 static const struct sunxi_ccu_desc sun50i_h616_r_ccu_desc = {
215 .ccu_clks = sun50i_h616_r_ccu_clks,
216 .num_ccu_clks = ARRAY_SIZE(sun50i_h616_r_ccu_clks),
217
218 .hw_clks = &sun50i_h616_r_hw_clks,
219
220 .resets = sun50i_h616_r_ccu_resets,
221 .num_resets = ARRAY_SIZE(sun50i_h616_r_ccu_resets),
222 };
223
sunxi_r_ccu_init(struct device_node * node,const struct sunxi_ccu_desc * desc)224 static void __init sunxi_r_ccu_init(struct device_node *node,
225 const struct sunxi_ccu_desc *desc)
226 {
227 void __iomem *reg;
228
229 reg = of_io_request_and_map(node, 0, of_node_full_name(node));
230 if (IS_ERR(reg)) {
231 pr_err("%pOF: Could not map the clock registers\n", node);
232 return;
233 }
234
235 of_sunxi_ccu_probe(node, reg, desc);
236 }
237
sun50i_h6_r_ccu_setup(struct device_node * node)238 static void __init sun50i_h6_r_ccu_setup(struct device_node *node)
239 {
240 sunxi_r_ccu_init(node, &sun50i_h6_r_ccu_desc);
241 }
242 CLK_OF_DECLARE(sun50i_h6_r_ccu, "allwinner,sun50i-h6-r-ccu",
243 sun50i_h6_r_ccu_setup);
244
sun50i_h616_r_ccu_setup(struct device_node * node)245 static void __init sun50i_h616_r_ccu_setup(struct device_node *node)
246 {
247 sunxi_r_ccu_init(node, &sun50i_h616_r_ccu_desc);
248 }
249 CLK_OF_DECLARE(sun50i_h616_r_ccu, "allwinner,sun50i-h616-r-ccu",
250 sun50i_h616_r_ccu_setup);
251