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 
16 static 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 
49 static const char *const sfc_mux_p[] __initconst = {
50 		"24m", "150m", "200m", "100m", "75m", };
51 static u32 sfc_mux_table[] = {0, 4, 5, 6, 7};
52 
53 static const char *const sdio_mux_p[] __initconst = {
54 		"75m", "100m", "50m", "15m", };
55 static u32 sdio_mux_table[] = {0, 1, 2, 3};
56 
57 static const char *const fephy_mux_p[] __initconst = { "25m", "125m"};
58 static u32 fephy_mux_table[] = {0, 1};
59 
60 
61 static 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 
73 static 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 
130 enum hix5hd2_clk_type {
131 	TYPE_COMPLEX,
132 	TYPE_ETHER,
133 };
134 
135 struct 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 
148 struct 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 
159 static 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 
172 static 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 
201 static 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 
211 static const struct clk_ops clk_ether_ops = {
212 	.prepare = clk_ether_prepare,
213 	.unprepare = clk_ether_unprepare,
214 };
215 
216 static 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 
234 static 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 
250 static const struct clk_ops clk_complex_ops = {
251 	.enable = clk_complex_enable,
252 	.disable = clk_complex_disable,
253 };
254 
255 static void __init
256 hix5hd2_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 
302 static 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 
322 CLK_OF_DECLARE(hix5hd2_clk, "hisilicon,hix5hd2-clock", hix5hd2_clk_init);
323