1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 Linaro Ltd.
4  * Copyright (c) 2014 Hisilicon Limited.
5  */
6 
7 #include <linux/of_address.h>
8 #include <dt-bindings/clock/hix5hd2-clock.h>
9 #include <linux/slab.h>
10 #include <linux/delay.h>
11 #include "clk.h"
12 
13 static struct hisi_fixed_rate_clock hix5hd2_fixed_rate_clks[] __initdata = {
14 	{ HIX5HD2_FIXED_1200M, "1200m", NULL, 0, 1200000000, },
15 	{ HIX5HD2_FIXED_400M, "400m", NULL, 0, 400000000, },
16 	{ HIX5HD2_FIXED_48M, "48m", NULL, 0, 48000000, },
17 	{ HIX5HD2_FIXED_24M, "24m", NULL, 0, 24000000, },
18 	{ HIX5HD2_FIXED_600M, "600m", NULL, 0, 600000000, },
19 	{ HIX5HD2_FIXED_300M, "300m", NULL, 0, 300000000, },
20 	{ HIX5HD2_FIXED_75M, "75m", NULL, 0, 75000000, },
21 	{ HIX5HD2_FIXED_200M, "200m", NULL, 0, 200000000, },
22 	{ HIX5HD2_FIXED_100M, "100m", NULL, 0, 100000000, },
23 	{ HIX5HD2_FIXED_40M, "40m", NULL, 0, 40000000, },
24 	{ HIX5HD2_FIXED_150M, "150m", NULL, 0, 150000000, },
25 	{ HIX5HD2_FIXED_1728M, "1728m", NULL, 0, 1728000000, },
26 	{ HIX5HD2_FIXED_28P8M, "28p8m", NULL, 0, 28000000, },
27 	{ HIX5HD2_FIXED_432M, "432m", NULL, 0, 432000000, },
28 	{ HIX5HD2_FIXED_345P6M, "345p6m", NULL, 0, 345000000, },
29 	{ HIX5HD2_FIXED_288M, "288m", NULL, 0, 288000000, },
30 	{ HIX5HD2_FIXED_60M,	"60m", NULL, 0, 60000000, },
31 	{ HIX5HD2_FIXED_750M, "750m", NULL, 0, 750000000, },
32 	{ HIX5HD2_FIXED_500M, "500m", NULL, 0, 500000000, },
33 	{ HIX5HD2_FIXED_54M,	"54m", NULL, 0, 54000000, },
34 	{ HIX5HD2_FIXED_27M, "27m", NULL, 0, 27000000, },
35 	{ HIX5HD2_FIXED_1500M, "1500m", NULL, 0, 1500000000, },
36 	{ HIX5HD2_FIXED_375M, "375m", NULL, 0, 375000000, },
37 	{ HIX5HD2_FIXED_187M, "187m", NULL, 0, 187000000, },
38 	{ HIX5HD2_FIXED_250M, "250m", NULL, 0, 250000000, },
39 	{ HIX5HD2_FIXED_125M, "125m", NULL, 0, 125000000, },
40 	{ HIX5HD2_FIXED_2P02M, "2m", NULL, 0, 2000000, },
41 	{ HIX5HD2_FIXED_50M, "50m", NULL, 0, 50000000, },
42 	{ HIX5HD2_FIXED_25M, "25m", NULL, 0, 25000000, },
43 	{ HIX5HD2_FIXED_83M, "83m", NULL, 0, 83333333, },
44 };
45 
46 static const char *const sfc_mux_p[] __initconst = {
47 		"24m", "150m", "200m", "100m", "75m", };
48 static u32 sfc_mux_table[] = {0, 4, 5, 6, 7};
49 
50 static const char *const sdio_mux_p[] __initconst = {
51 		"75m", "100m", "50m", "15m", };
52 static u32 sdio_mux_table[] = {0, 1, 2, 3};
53 
54 static const char *const fephy_mux_p[] __initconst = { "25m", "125m"};
55 static u32 fephy_mux_table[] = {0, 1};
56 
57 
58 static struct hisi_mux_clock hix5hd2_mux_clks[] __initdata = {
59 	{ HIX5HD2_SFC_MUX, "sfc_mux", sfc_mux_p, ARRAY_SIZE(sfc_mux_p),
60 		CLK_SET_RATE_PARENT, 0x5c, 8, 3, 0, sfc_mux_table, },
61 	{ HIX5HD2_MMC_MUX, "mmc_mux", sdio_mux_p, ARRAY_SIZE(sdio_mux_p),
62 		CLK_SET_RATE_PARENT, 0xa0, 8, 2, 0, sdio_mux_table, },
63 	{ HIX5HD2_SD_MUX, "sd_mux", sdio_mux_p, ARRAY_SIZE(sdio_mux_p),
64 		CLK_SET_RATE_PARENT, 0x9c, 8, 2, 0, sdio_mux_table, },
65 	{ HIX5HD2_FEPHY_MUX, "fephy_mux",
66 		fephy_mux_p, ARRAY_SIZE(fephy_mux_p),
67 		CLK_SET_RATE_PARENT, 0x120, 8, 2, 0, fephy_mux_table, },
68 };
69 
70 static struct hisi_gate_clock hix5hd2_gate_clks[] __initdata = {
71 	/* sfc */
72 	{ HIX5HD2_SFC_CLK, "clk_sfc", "sfc_mux",
73 		CLK_SET_RATE_PARENT, 0x5c, 0, 0, },
74 	{ HIX5HD2_SFC_RST, "rst_sfc", "clk_sfc",
75 		CLK_SET_RATE_PARENT, 0x5c, 4, CLK_GATE_SET_TO_DISABLE, },
76 	/* sdio0 */
77 	{ HIX5HD2_SD_BIU_CLK, "clk_sd_biu", "200m",
78 		CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
79 	{ HIX5HD2_SD_CIU_CLK, "clk_sd_ciu", "sd_mux",
80 		CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
81 	{ HIX5HD2_SD_CIU_RST, "rst_sd_ciu", "clk_sd_ciu",
82 		CLK_SET_RATE_PARENT, 0x9c, 4, CLK_GATE_SET_TO_DISABLE, },
83 	/* sdio1 */
84 	{ HIX5HD2_MMC_BIU_CLK, "clk_mmc_biu", "200m",
85 		CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
86 	{ HIX5HD2_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
87 		CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
88 	{ HIX5HD2_MMC_CIU_RST, "rst_mmc_ciu", "clk_mmc_ciu",
89 		CLK_SET_RATE_PARENT, 0xa0, 4, CLK_GATE_SET_TO_DISABLE, },
90 	/* gsf */
91 	{ HIX5HD2_FWD_BUS_CLK, "clk_fwd_bus", NULL, 0, 0xcc, 0, 0, },
92 	{ HIX5HD2_FWD_SYS_CLK, "clk_fwd_sys", "clk_fwd_bus", 0, 0xcc, 5, 0, },
93 	{ HIX5HD2_MAC0_PHY_CLK, "clk_fephy", "clk_fwd_sys",
94 		 CLK_SET_RATE_PARENT, 0x120, 0, 0, },
95 	/* wdg0 */
96 	{ HIX5HD2_WDG0_CLK, "clk_wdg0", "24m",
97 		CLK_SET_RATE_PARENT, 0x178, 0, 0, },
98 	{ HIX5HD2_WDG0_RST, "rst_wdg0", "clk_wdg0",
99 		CLK_SET_RATE_PARENT, 0x178, 4, CLK_GATE_SET_TO_DISABLE, },
100 	/* I2C */
101 	{HIX5HD2_I2C0_CLK, "clk_i2c0", "100m",
102 		 CLK_SET_RATE_PARENT, 0x06c, 4, 0, },
103 	{HIX5HD2_I2C0_RST, "rst_i2c0", "clk_i2c0",
104 		 CLK_SET_RATE_PARENT, 0x06c, 5, CLK_GATE_SET_TO_DISABLE, },
105 	{HIX5HD2_I2C1_CLK, "clk_i2c1", "100m",
106 		 CLK_SET_RATE_PARENT, 0x06c, 8, 0, },
107 	{HIX5HD2_I2C1_RST, "rst_i2c1", "clk_i2c1",
108 		 CLK_SET_RATE_PARENT, 0x06c, 9, CLK_GATE_SET_TO_DISABLE, },
109 	{HIX5HD2_I2C2_CLK, "clk_i2c2", "100m",
110 		 CLK_SET_RATE_PARENT, 0x06c, 12, 0, },
111 	{HIX5HD2_I2C2_RST, "rst_i2c2", "clk_i2c2",
112 		 CLK_SET_RATE_PARENT, 0x06c, 13, CLK_GATE_SET_TO_DISABLE, },
113 	{HIX5HD2_I2C3_CLK, "clk_i2c3", "100m",
114 		 CLK_SET_RATE_PARENT, 0x06c, 16, 0, },
115 	{HIX5HD2_I2C3_RST, "rst_i2c3", "clk_i2c3",
116 		 CLK_SET_RATE_PARENT, 0x06c, 17, CLK_GATE_SET_TO_DISABLE, },
117 	{HIX5HD2_I2C4_CLK, "clk_i2c4", "100m",
118 		 CLK_SET_RATE_PARENT, 0x06c, 20, 0, },
119 	{HIX5HD2_I2C4_RST, "rst_i2c4", "clk_i2c4",
120 		 CLK_SET_RATE_PARENT, 0x06c, 21, CLK_GATE_SET_TO_DISABLE, },
121 	{HIX5HD2_I2C5_CLK, "clk_i2c5", "100m",
122 		 CLK_SET_RATE_PARENT, 0x06c, 0, 0, },
123 	{HIX5HD2_I2C5_RST, "rst_i2c5", "clk_i2c5",
124 		 CLK_SET_RATE_PARENT, 0x06c, 1, CLK_GATE_SET_TO_DISABLE, },
125 };
126 
127 enum hix5hd2_clk_type {
128 	TYPE_COMPLEX,
129 	TYPE_ETHER,
130 };
131 
132 struct hix5hd2_complex_clock {
133 	const char	*name;
134 	const char	*parent_name;
135 	u32		id;
136 	u32		ctrl_reg;
137 	u32		ctrl_clk_mask;
138 	u32		ctrl_rst_mask;
139 	u32		phy_reg;
140 	u32		phy_clk_mask;
141 	u32		phy_rst_mask;
142 	enum hix5hd2_clk_type type;
143 };
144 
145 struct hix5hd2_clk_complex {
146 	struct clk_hw	hw;
147 	u32		id;
148 	void __iomem	*ctrl_reg;
149 	u32		ctrl_clk_mask;
150 	u32		ctrl_rst_mask;
151 	void __iomem	*phy_reg;
152 	u32		phy_clk_mask;
153 	u32		phy_rst_mask;
154 };
155 
156 static struct hix5hd2_complex_clock hix5hd2_complex_clks[] __initdata = {
157 	{"clk_mac0", "clk_fephy", HIX5HD2_MAC0_CLK,
158 		0xcc, 0xa, 0x500, 0x120, 0, 0x10, TYPE_ETHER},
159 	{"clk_mac1", "clk_fwd_sys", HIX5HD2_MAC1_CLK,
160 		0xcc, 0x14, 0xa00, 0x168, 0x2, 0, TYPE_ETHER},
161 	{"clk_sata", NULL, HIX5HD2_SATA_CLK,
162 		0xa8, 0x1f, 0x300, 0xac, 0x1, 0x0, TYPE_COMPLEX},
163 	{"clk_usb", NULL, HIX5HD2_USB_CLK,
164 		0xb8, 0xff, 0x3f000, 0xbc, 0x7, 0x3f00, TYPE_COMPLEX},
165 };
166 
167 #define to_complex_clk(_hw) container_of(_hw, struct hix5hd2_clk_complex, hw)
168 
clk_ether_prepare(struct clk_hw * hw)169 static int clk_ether_prepare(struct clk_hw *hw)
170 {
171 	struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
172 	u32 val;
173 
174 	val = readl_relaxed(clk->ctrl_reg);
175 	val |= clk->ctrl_clk_mask | clk->ctrl_rst_mask;
176 	writel_relaxed(val, clk->ctrl_reg);
177 	val &= ~(clk->ctrl_rst_mask);
178 	writel_relaxed(val, clk->ctrl_reg);
179 
180 	val = readl_relaxed(clk->phy_reg);
181 	val |= clk->phy_clk_mask;
182 	val &= ~(clk->phy_rst_mask);
183 	writel_relaxed(val, clk->phy_reg);
184 	mdelay(10);
185 
186 	val &= ~(clk->phy_clk_mask);
187 	val |= clk->phy_rst_mask;
188 	writel_relaxed(val, clk->phy_reg);
189 	mdelay(10);
190 
191 	val |= clk->phy_clk_mask;
192 	val &= ~(clk->phy_rst_mask);
193 	writel_relaxed(val, clk->phy_reg);
194 	mdelay(30);
195 	return 0;
196 }
197 
clk_ether_unprepare(struct clk_hw * hw)198 static void clk_ether_unprepare(struct clk_hw *hw)
199 {
200 	struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
201 	u32 val;
202 
203 	val = readl_relaxed(clk->ctrl_reg);
204 	val &= ~(clk->ctrl_clk_mask);
205 	writel_relaxed(val, clk->ctrl_reg);
206 }
207 
208 static const struct clk_ops clk_ether_ops = {
209 	.prepare = clk_ether_prepare,
210 	.unprepare = clk_ether_unprepare,
211 };
212 
clk_complex_enable(struct clk_hw * hw)213 static int clk_complex_enable(struct clk_hw *hw)
214 {
215 	struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
216 	u32 val;
217 
218 	val = readl_relaxed(clk->ctrl_reg);
219 	val |= clk->ctrl_clk_mask;
220 	val &= ~(clk->ctrl_rst_mask);
221 	writel_relaxed(val, clk->ctrl_reg);
222 
223 	val = readl_relaxed(clk->phy_reg);
224 	val |= clk->phy_clk_mask;
225 	val &= ~(clk->phy_rst_mask);
226 	writel_relaxed(val, clk->phy_reg);
227 
228 	return 0;
229 }
230 
clk_complex_disable(struct clk_hw * hw)231 static void clk_complex_disable(struct clk_hw *hw)
232 {
233 	struct hix5hd2_clk_complex *clk = to_complex_clk(hw);
234 	u32 val;
235 
236 	val = readl_relaxed(clk->ctrl_reg);
237 	val |= clk->ctrl_rst_mask;
238 	val &= ~(clk->ctrl_clk_mask);
239 	writel_relaxed(val, clk->ctrl_reg);
240 
241 	val = readl_relaxed(clk->phy_reg);
242 	val |= clk->phy_rst_mask;
243 	val &= ~(clk->phy_clk_mask);
244 	writel_relaxed(val, clk->phy_reg);
245 }
246 
247 static const struct clk_ops clk_complex_ops = {
248 	.enable = clk_complex_enable,
249 	.disable = clk_complex_disable,
250 };
251 
252 static void __init
hix5hd2_clk_register_complex(struct hix5hd2_complex_clock * clks,int nums,struct hisi_clock_data * data)253 hix5hd2_clk_register_complex(struct hix5hd2_complex_clock *clks, int nums,
254 			     struct hisi_clock_data *data)
255 {
256 	void __iomem *base = data->base;
257 	int i;
258 
259 	for (i = 0; i < nums; i++) {
260 		struct hix5hd2_clk_complex *p_clk;
261 		struct clk *clk;
262 		struct clk_init_data init;
263 
264 		p_clk = kzalloc(sizeof(*p_clk), GFP_KERNEL);
265 		if (!p_clk)
266 			return;
267 
268 		init.name = clks[i].name;
269 		if (clks[i].type == TYPE_ETHER)
270 			init.ops = &clk_ether_ops;
271 		else
272 			init.ops = &clk_complex_ops;
273 
274 		init.flags = 0;
275 		init.parent_names =
276 			(clks[i].parent_name ? &clks[i].parent_name : NULL);
277 		init.num_parents = (clks[i].parent_name ? 1 : 0);
278 
279 		p_clk->ctrl_reg = base + clks[i].ctrl_reg;
280 		p_clk->ctrl_clk_mask = clks[i].ctrl_clk_mask;
281 		p_clk->ctrl_rst_mask = clks[i].ctrl_rst_mask;
282 		p_clk->phy_reg = base + clks[i].phy_reg;
283 		p_clk->phy_clk_mask = clks[i].phy_clk_mask;
284 		p_clk->phy_rst_mask = clks[i].phy_rst_mask;
285 		p_clk->hw.init = &init;
286 
287 		clk = clk_register(NULL, &p_clk->hw);
288 		if (IS_ERR(clk)) {
289 			kfree(p_clk);
290 			pr_err("%s: failed to register clock %s\n",
291 			       __func__, clks[i].name);
292 			continue;
293 		}
294 
295 		data->clk_data.clks[clks[i].id] = clk;
296 	}
297 }
298 
hix5hd2_clk_init(struct device_node * np)299 static void __init hix5hd2_clk_init(struct device_node *np)
300 {
301 	struct hisi_clock_data *clk_data;
302 
303 	clk_data = hisi_clk_init(np, HIX5HD2_NR_CLKS);
304 	if (!clk_data)
305 		return;
306 
307 	hisi_clk_register_fixed_rate(hix5hd2_fixed_rate_clks,
308 				     ARRAY_SIZE(hix5hd2_fixed_rate_clks),
309 				     clk_data);
310 	hisi_clk_register_mux(hix5hd2_mux_clks, ARRAY_SIZE(hix5hd2_mux_clks),
311 					clk_data);
312 	hisi_clk_register_gate(hix5hd2_gate_clks,
313 			ARRAY_SIZE(hix5hd2_gate_clks), clk_data);
314 	hix5hd2_clk_register_complex(hix5hd2_complex_clks,
315 				     ARRAY_SIZE(hix5hd2_complex_clks),
316 				     clk_data);
317 }
318 
319 CLK_OF_DECLARE(hix5hd2_clk, "hisilicon,hix5hd2-clock", hix5hd2_clk_init);
320