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1/*
2 * Copyright (c) 2014 Linaro Ltd.
3 * Copyright (c) 2014 Hisilicon Limited.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 */
9
10#include <linux/of_address.h>
11#include <dt-bindings/clock/hix5hd2-clock.h>
12#include <linux/slab.h>
13#include <linux/delay.h>
14#include "clk.h"
15
16static struct hisi_fixed_rate_clock hix5hd2_fixed_rate_clks[] __initdata = {
17 { HIX5HD2_FIXED_1200M, "1200m", NULL, 0, 1200000000, },
18 { HIX5HD2_FIXED_400M, "400m", NULL, 0, 400000000, },
19 { HIX5HD2_FIXED_48M, "48m", NULL, 0, 48000000, },
20 { HIX5HD2_FIXED_24M, "24m", NULL, 0, 24000000, },
21 { HIX5HD2_FIXED_600M, "600m", NULL, 0, 600000000, },
22 { HIX5HD2_FIXED_300M, "300m", NULL, 0, 300000000, },
23 { HIX5HD2_FIXED_75M, "75m", NULL, 0, 75000000, },
24 { HIX5HD2_FIXED_200M, "200m", NULL, 0, 200000000, },
25 { HIX5HD2_FIXED_100M, "100m", NULL, 0, 100000000, },
26 { HIX5HD2_FIXED_40M, "40m", NULL, 0, 40000000, },
27 { HIX5HD2_FIXED_150M, "150m", NULL, 0, 150000000, },
28 { HIX5HD2_FIXED_1728M, "1728m", NULL, 0, 1728000000, },
29 { HIX5HD2_FIXED_28P8M, "28p8m", NULL, 0, 28000000, },
30 { HIX5HD2_FIXED_432M, "432m", NULL, 0, 432000000, },
31 { HIX5HD2_FIXED_345P6M, "345p6m", NULL, 0, 345000000, },
32 { HIX5HD2_FIXED_288M, "288m", NULL, 0, 288000000, },
33 { HIX5HD2_FIXED_60M, "60m", NULL, 0, 60000000, },
34 { HIX5HD2_FIXED_750M, "750m", NULL, 0, 750000000, },
35 { HIX5HD2_FIXED_500M, "500m", NULL, 0, 500000000, },
36 { HIX5HD2_FIXED_54M, "54m", NULL, 0, 54000000, },
37 { HIX5HD2_FIXED_27M, "27m", NULL, 0, 27000000, },
38 { HIX5HD2_FIXED_1500M, "1500m", NULL, 0, 1500000000, },
39 { HIX5HD2_FIXED_375M, "375m", NULL, 0, 375000000, },
40 { HIX5HD2_FIXED_187M, "187m", NULL, 0, 187000000, },
41 { HIX5HD2_FIXED_250M, "250m", NULL, 0, 250000000, },
42 { HIX5HD2_FIXED_125M, "125m", NULL, 0, 125000000, },
43 { HIX5HD2_FIXED_2P02M, "2m", NULL, 0, 2000000, },
44 { HIX5HD2_FIXED_50M, "50m", NULL, 0, 50000000, },
45 { HIX5HD2_FIXED_25M, "25m", NULL, 0, 25000000, },
46 { HIX5HD2_FIXED_83M, "83m", NULL, 0, 83333333, },
47};
48
49static const char *const sfc_mux_p[] __initconst = {
50 "24m", "150m", "200m", "100m", "75m", };
51static u32 sfc_mux_table[] = {0, 4, 5, 6, 7};
52
53static const char *const sdio_mux_p[] __initconst = {
54 "75m", "100m", "50m", "15m", };
55static u32 sdio_mux_table[] = {0, 1, 2, 3};
56
57static const char *const fephy_mux_p[] __initconst = { "25m", "125m"};
58static u32 fephy_mux_table[] = {0, 1};
59
60
61static struct hisi_mux_clock hix5hd2_mux_clks[] __initdata = {
62 { HIX5HD2_SFC_MUX, "sfc_mux", sfc_mux_p, ARRAY_SIZE(sfc_mux_p),
63 CLK_SET_RATE_PARENT, 0x5c, 8, 3, 0, sfc_mux_table, },
64 { HIX5HD2_MMC_MUX, "mmc_mux", sdio_mux_p, ARRAY_SIZE(sdio_mux_p),
65 CLK_SET_RATE_PARENT, 0xa0, 8, 2, 0, sdio_mux_table, },
66 { HIX5HD2_SD_MUX, "sd_mux", sdio_mux_p, ARRAY_SIZE(sdio_mux_p),
67 CLK_SET_RATE_PARENT, 0x9c, 8, 2, 0, sdio_mux_table, },
68 { HIX5HD2_FEPHY_MUX, "fephy_mux",
69 fephy_mux_p, ARRAY_SIZE(fephy_mux_p),
70 CLK_SET_RATE_PARENT, 0x120, 8, 2, 0, fephy_mux_table, },
71};
72
73static struct hisi_gate_clock hix5hd2_gate_clks[] __initdata = {
74 /* sfc */
75 { HIX5HD2_SFC_CLK, "clk_sfc", "sfc_mux",
76 CLK_SET_RATE_PARENT, 0x5c, 0, 0, },
77 { HIX5HD2_SFC_RST, "rst_sfc", "clk_sfc",
78 CLK_SET_RATE_PARENT, 0x5c, 4, CLK_GATE_SET_TO_DISABLE, },
79 /* sdio0 */
80 { HIX5HD2_SD_BIU_CLK, "clk_sd_biu", "200m",
81 CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
82 { HIX5HD2_SD_CIU_CLK, "clk_sd_ciu", "sd_mux",
83 CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
84 { HIX5HD2_SD_CIU_RST, "rst_sd_ciu", "clk_sd_ciu",
85 CLK_SET_RATE_PARENT, 0x9c, 4, CLK_GATE_SET_TO_DISABLE, },
86 /* sdio1 */
87 { HIX5HD2_MMC_BIU_CLK, "clk_mmc_biu", "200m",
88 CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
89 { HIX5HD2_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
90 CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
91 { HIX5HD2_MMC_CIU_RST, "rst_mmc_ciu", "clk_mmc_ciu",
92 CLK_SET_RATE_PARENT, 0xa0, 4, CLK_GATE_SET_TO_DISABLE, },
93 /* gsf */
94 { HIX5HD2_FWD_BUS_CLK, "clk_fwd_bus", NULL, 0, 0xcc, 0, 0, },
95 { HIX5HD2_FWD_SYS_CLK, "clk_fwd_sys", "clk_fwd_bus", 0, 0xcc, 5, 0, },
96 { HIX5HD2_MAC0_PHY_CLK, "clk_fephy", "clk_fwd_sys",
97 CLK_SET_RATE_PARENT, 0x120, 0, 0, },
98 /* wdg0 */
99 { HIX5HD2_WDG0_CLK, "clk_wdg0", "24m",
100 CLK_SET_RATE_PARENT, 0x178, 0, 0, },
101 { HIX5HD2_WDG0_RST, "rst_wdg0", "clk_wdg0",
102 CLK_SET_RATE_PARENT, 0x178, 4, CLK_GATE_SET_TO_DISABLE, },
103 /* I2C */
104 {HIX5HD2_I2C0_CLK, "clk_i2c0", "100m",
105 CLK_SET_RATE_PARENT, 0x06c, 4, 0, },
106 {HIX5HD2_I2C0_RST, "rst_i2c0", "clk_i2c0",
107 CLK_SET_RATE_PARENT, 0x06c, 5, CLK_GATE_SET_TO_DISABLE, },
108 {HIX5HD2_I2C1_CLK, "clk_i2c1", "100m",
109 CLK_SET_RATE_PARENT, 0x06c, 8, 0, },
110 {HIX5HD2_I2C1_RST, "rst_i2c1", "clk_i2c1",
111 CLK_SET_RATE_PARENT, 0x06c, 9, CLK_GATE_SET_TO_DISABLE, },
112 {HIX5HD2_I2C2_CLK, "clk_i2c2", "100m",
113 CLK_SET_RATE_PARENT, 0x06c, 12, 0, },
114 {HIX5HD2_I2C2_RST, "rst_i2c2", "clk_i2c2",
115 CLK_SET_RATE_PARENT, 0x06c, 13, CLK_GATE_SET_TO_DISABLE, },
116 {HIX5HD2_I2C3_CLK, "clk_i2c3", "100m",
117 CLK_SET_RATE_PARENT, 0x06c, 16, 0, },
118 {HIX5HD2_I2C3_RST, "rst_i2c3", "clk_i2c3",
119 CLK_SET_RATE_PARENT, 0x06c, 17, CLK_GATE_SET_TO_DISABLE, },
120 {HIX5HD2_I2C4_CLK, "clk_i2c4", "100m",
121 CLK_SET_RATE_PARENT, 0x06c, 20, 0, },
122 {HIX5HD2_I2C4_RST, "rst_i2c4", "clk_i2c4",
123 CLK_SET_RATE_PARENT, 0x06c, 21, CLK_GATE_SET_TO_DISABLE, },
124 {HIX5HD2_I2C5_CLK, "clk_i2c5", "100m",
125 CLK_SET_RATE_PARENT, 0x06c, 0, 0, },
126 {HIX5HD2_I2C5_RST, "rst_i2c5", "clk_i2c5",
127 CLK_SET_RATE_PARENT, 0x06c, 1, CLK_GATE_SET_TO_DISABLE, },
128};
129
130enum hix5hd2_clk_type {
131 TYPE_COMPLEX,
132 TYPE_ETHER,
133};
134
135struct hix5hd2_complex_clock {
136 const char *name;
137 const char *parent_name;
138 u32 id;
139 u32 ctrl_reg;
140 u32 ctrl_clk_mask;
141 u32 ctrl_rst_mask;
142 u32 phy_reg;
143 u32 phy_clk_mask;
144 u32 phy_rst_mask;
145 enum hix5hd2_clk_type type;
146};
147
148struct hix5hd2_clk_complex {
149 struct clk_hw hw;
150 u32 id;
151 void __iomem *ctrl_reg;
152 u32 ctrl_clk_mask;
153 u32 ctrl_rst_mask;
154 void __iomem *phy_reg;
155 u32 phy_clk_mask;
156 u32 phy_rst_mask;
157};
158
159static struct hix5hd2_complex_clock hix5hd2_complex_clks[] __initdata = {
160 {"clk_mac0", "clk_fephy", HIX5HD2_MAC0_CLK,
161 0xcc, 0xa, 0x500, 0x120, 0, 0x10, TYPE_ETHER},
162 {"clk_mac1", "clk_fwd_sys", HIX5HD2_MAC1_CLK,
163 0xcc, 0x14, 0xa00, 0x168, 0x2, 0, TYPE_ETHER},
164 {"clk_sata", NULL, HIX5HD2_SATA_CLK,
165 0xa8, 0x1f, 0x300, 0xac, 0x1, 0x0, TYPE_COMPLEX},
166 {"clk_usb", NULL, HIX5HD2_USB_CLK,
167 0xb8, 0xff, 0x3f000, 0xbc, 0x7, 0x3f00, TYPE_COMPLEX},
168};
169
170#define to_complex_clk(_hw) container_of(_hw, struct hix5hd2_clk_complex, hw)
171
172static int clk_ether_prepare(struct clk_hw *hw)
173{
174 struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
175 u32 val;
176
177 val = readl_relaxed(clk->ctrl_reg);
178 val |= clk->ctrl_clk_mask | clk->ctrl_rst_mask;
179 writel_relaxed(val, clk->ctrl_reg);
180 val &= ~(clk->ctrl_rst_mask);
181 writel_relaxed(val, clk->ctrl_reg);
182
183 val = readl_relaxed(clk->phy_reg);
184 val |= clk->phy_clk_mask;
185 val &= ~(clk->phy_rst_mask);
186 writel_relaxed(val, clk->phy_reg);
187 mdelay(10);
188
189 val &= ~(clk->phy_clk_mask);
190 val |= clk->phy_rst_mask;
191 writel_relaxed(val, clk->phy_reg);
192 mdelay(10);
193
194 val |= clk->phy_clk_mask;
195 val &= ~(clk->phy_rst_mask);
196 writel_relaxed(val, clk->phy_reg);
197 mdelay(30);
198 return 0;
199}
200
201static void clk_ether_unprepare(struct clk_hw *hw)
202{
203 struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
204 u32 val;
205
206 val = readl_relaxed(clk->ctrl_reg);
207 val &= ~(clk->ctrl_clk_mask);
208 writel_relaxed(val, clk->ctrl_reg);
209}
210
211static const struct clk_ops clk_ether_ops = {
212 .prepare = clk_ether_prepare,
213 .unprepare = clk_ether_unprepare,
214};
215
216static int clk_complex_enable(struct clk_hw *hw)
217{
218 struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
219 u32 val;
220
221 val = readl_relaxed(clk->ctrl_reg);
222 val |= clk->ctrl_clk_mask;
223 val &= ~(clk->ctrl_rst_mask);
224 writel_relaxed(val, clk->ctrl_reg);
225
226 val = readl_relaxed(clk->phy_reg);
227 val |= clk->phy_clk_mask;
228 val &= ~(clk->phy_rst_mask);
229 writel_relaxed(val, clk->phy_reg);
230
231 return 0;
232}
233
234static void clk_complex_disable(struct clk_hw *hw)
235{
236 struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
237 u32 val;
238
239 val = readl_relaxed(clk->ctrl_reg);
240 val |= clk->ctrl_rst_mask;
241 val &= ~(clk->ctrl_clk_mask);
242 writel_relaxed(val, clk->ctrl_reg);
243
244 val = readl_relaxed(clk->phy_reg);
245 val |= clk->phy_rst_mask;
246 val &= ~(clk->phy_clk_mask);
247 writel_relaxed(val, clk->phy_reg);
248}
249
250static const struct clk_ops clk_complex_ops = {
251 .enable = clk_complex_enable,
252 .disable = clk_complex_disable,
253};
254
255static void __init
256hix5hd2_clk_register_complex(struct hix5hd2_complex_clock *clks, int nums,
257 struct hisi_clock_data *data)
258{
259 void __iomem *base = data->base;
260 int i;
261
262 for (i = 0; i < nums; i++) {
263 struct hix5hd2_clk_complex *p_clk;
264 struct clk *clk;
265 struct clk_init_data init;
266
267 p_clk = kzalloc(sizeof(*p_clk), GFP_KERNEL);
268 if (!p_clk)
269 return;
270
271 init.name = clks[i].name;
272 if (clks[i].type == TYPE_ETHER)
273 init.ops = &clk_ether_ops;
274 else
275 init.ops = &clk_complex_ops;
276
277 init.flags = 0;
278 init.parent_names =
279 (clks[i].parent_name ? &clks[i].parent_name : NULL);
280 init.num_parents = (clks[i].parent_name ? 1 : 0);
281
282 p_clk->ctrl_reg = base + clks[i].ctrl_reg;
283 p_clk->ctrl_clk_mask = clks[i].ctrl_clk_mask;
284 p_clk->ctrl_rst_mask = clks[i].ctrl_rst_mask;
285 p_clk->phy_reg = base + clks[i].phy_reg;
286 p_clk->phy_clk_mask = clks[i].phy_clk_mask;
287 p_clk->phy_rst_mask = clks[i].phy_rst_mask;
288 p_clk->hw.init = &init;
289
290 clk = clk_register(NULL, &p_clk->hw);
291 if (IS_ERR(clk)) {
292 kfree(p_clk);
293 pr_err("%s: failed to register clock %s\n",
294 __func__, clks[i].name);
295 continue;
296 }
297
298 data->clk_data.clks[clks[i].id] = clk;
299 }
300}
301
302static void __init hix5hd2_clk_init(struct device_node *np)
303{
304 struct hisi_clock_data *clk_data;
305
306 clk_data = hisi_clk_init(np, HIX5HD2_NR_CLKS);
307 if (!clk_data)
308 return;
309
310 hisi_clk_register_fixed_rate(hix5hd2_fixed_rate_clks,
311 ARRAY_SIZE(hix5hd2_fixed_rate_clks),
312 clk_data);
313 hisi_clk_register_mux(hix5hd2_mux_clks, ARRAY_SIZE(hix5hd2_mux_clks),
314 clk_data);
315 hisi_clk_register_gate(hix5hd2_gate_clks,
316 ARRAY_SIZE(hix5hd2_gate_clks), clk_data);
317 hix5hd2_clk_register_complex(hix5hd2_complex_clks,
318 ARRAY_SIZE(hix5hd2_complex_clks),
319 clk_data);
320}
321
322CLK_OF_DECLARE(hix5hd2_clk, "hisilicon,hix5hd2-clock", hix5hd2_clk_init);
323

Warning: That file was not part of the compilation database. It may have many parsing errors.