This source file includes following definitions.
- sun6i_dphy_init
- sun6i_dphy_configure
- sun6i_dphy_power_on
- sun6i_dphy_power_off
- sun6i_dphy_exit
- sun6i_dphy_probe
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9 #include <linux/bitops.h>
10 #include <linux/clk.h>
11 #include <linux/module.h>
12 #include <linux/of_address.h>
13 #include <linux/platform_device.h>
14 #include <linux/regmap.h>
15 #include <linux/reset.h>
16
17 #include <linux/phy/phy.h>
18 #include <linux/phy/phy-mipi-dphy.h>
19
20 #define SUN6I_DPHY_GCTL_REG 0x00
21 #define SUN6I_DPHY_GCTL_LANE_NUM(n) ((((n) - 1) & 3) << 4)
22 #define SUN6I_DPHY_GCTL_EN BIT(0)
23
24 #define SUN6I_DPHY_TX_CTL_REG 0x04
25 #define SUN6I_DPHY_TX_CTL_HS_TX_CLK_CONT BIT(28)
26
27 #define SUN6I_DPHY_TX_TIME0_REG 0x10
28 #define SUN6I_DPHY_TX_TIME0_HS_TRAIL(n) (((n) & 0xff) << 24)
29 #define SUN6I_DPHY_TX_TIME0_HS_PREPARE(n) (((n) & 0xff) << 16)
30 #define SUN6I_DPHY_TX_TIME0_LP_CLK_DIV(n) ((n) & 0xff)
31
32 #define SUN6I_DPHY_TX_TIME1_REG 0x14
33 #define SUN6I_DPHY_TX_TIME1_CLK_POST(n) (((n) & 0xff) << 24)
34 #define SUN6I_DPHY_TX_TIME1_CLK_PRE(n) (((n) & 0xff) << 16)
35 #define SUN6I_DPHY_TX_TIME1_CLK_ZERO(n) (((n) & 0xff) << 8)
36 #define SUN6I_DPHY_TX_TIME1_CLK_PREPARE(n) ((n) & 0xff)
37
38 #define SUN6I_DPHY_TX_TIME2_REG 0x18
39 #define SUN6I_DPHY_TX_TIME2_CLK_TRAIL(n) ((n) & 0xff)
40
41 #define SUN6I_DPHY_TX_TIME3_REG 0x1c
42
43 #define SUN6I_DPHY_TX_TIME4_REG 0x20
44 #define SUN6I_DPHY_TX_TIME4_HS_TX_ANA1(n) (((n) & 0xff) << 8)
45 #define SUN6I_DPHY_TX_TIME4_HS_TX_ANA0(n) ((n) & 0xff)
46
47 #define SUN6I_DPHY_ANA0_REG 0x4c
48 #define SUN6I_DPHY_ANA0_REG_PWS BIT(31)
49 #define SUN6I_DPHY_ANA0_REG_DMPC BIT(28)
50 #define SUN6I_DPHY_ANA0_REG_DMPD(n) (((n) & 0xf) << 24)
51 #define SUN6I_DPHY_ANA0_REG_SLV(n) (((n) & 7) << 12)
52 #define SUN6I_DPHY_ANA0_REG_DEN(n) (((n) & 0xf) << 8)
53
54 #define SUN6I_DPHY_ANA1_REG 0x50
55 #define SUN6I_DPHY_ANA1_REG_VTTMODE BIT(31)
56 #define SUN6I_DPHY_ANA1_REG_CSMPS(n) (((n) & 3) << 28)
57 #define SUN6I_DPHY_ANA1_REG_SVTT(n) (((n) & 0xf) << 24)
58
59 #define SUN6I_DPHY_ANA2_REG 0x54
60 #define SUN6I_DPHY_ANA2_EN_P2S_CPU(n) (((n) & 0xf) << 24)
61 #define SUN6I_DPHY_ANA2_EN_P2S_CPU_MASK GENMASK(27, 24)
62 #define SUN6I_DPHY_ANA2_EN_CK_CPU BIT(4)
63 #define SUN6I_DPHY_ANA2_REG_ENIB BIT(1)
64
65 #define SUN6I_DPHY_ANA3_REG 0x58
66 #define SUN6I_DPHY_ANA3_EN_VTTD(n) (((n) & 0xf) << 28)
67 #define SUN6I_DPHY_ANA3_EN_VTTD_MASK GENMASK(31, 28)
68 #define SUN6I_DPHY_ANA3_EN_VTTC BIT(27)
69 #define SUN6I_DPHY_ANA3_EN_DIV BIT(26)
70 #define SUN6I_DPHY_ANA3_EN_LDOC BIT(25)
71 #define SUN6I_DPHY_ANA3_EN_LDOD BIT(24)
72 #define SUN6I_DPHY_ANA3_EN_LDOR BIT(18)
73
74 #define SUN6I_DPHY_ANA4_REG 0x5c
75 #define SUN6I_DPHY_ANA4_REG_DMPLVC BIT(24)
76 #define SUN6I_DPHY_ANA4_REG_DMPLVD(n) (((n) & 0xf) << 20)
77 #define SUN6I_DPHY_ANA4_REG_CKDV(n) (((n) & 0x1f) << 12)
78 #define SUN6I_DPHY_ANA4_REG_TMSC(n) (((n) & 3) << 10)
79 #define SUN6I_DPHY_ANA4_REG_TMSD(n) (((n) & 3) << 8)
80 #define SUN6I_DPHY_ANA4_REG_TXDNSC(n) (((n) & 3) << 6)
81 #define SUN6I_DPHY_ANA4_REG_TXDNSD(n) (((n) & 3) << 4)
82 #define SUN6I_DPHY_ANA4_REG_TXPUSC(n) (((n) & 3) << 2)
83 #define SUN6I_DPHY_ANA4_REG_TXPUSD(n) ((n) & 3)
84
85 #define SUN6I_DPHY_DBG5_REG 0xf4
86
87 struct sun6i_dphy {
88 struct clk *bus_clk;
89 struct clk *mod_clk;
90 struct regmap *regs;
91 struct reset_control *reset;
92
93 struct phy *phy;
94 struct phy_configure_opts_mipi_dphy config;
95 };
96
97 static int sun6i_dphy_init(struct phy *phy)
98 {
99 struct sun6i_dphy *dphy = phy_get_drvdata(phy);
100
101 reset_control_deassert(dphy->reset);
102 clk_prepare_enable(dphy->mod_clk);
103 clk_set_rate_exclusive(dphy->mod_clk, 150000000);
104
105 return 0;
106 }
107
108 static int sun6i_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
109 {
110 struct sun6i_dphy *dphy = phy_get_drvdata(phy);
111 int ret;
112
113 ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
114 if (ret)
115 return ret;
116
117 memcpy(&dphy->config, opts, sizeof(dphy->config));
118
119 return 0;
120 }
121
122 static int sun6i_dphy_power_on(struct phy *phy)
123 {
124 struct sun6i_dphy *dphy = phy_get_drvdata(phy);
125 u8 lanes_mask = GENMASK(dphy->config.lanes - 1, 0);
126
127 regmap_write(dphy->regs, SUN6I_DPHY_TX_CTL_REG,
128 SUN6I_DPHY_TX_CTL_HS_TX_CLK_CONT);
129
130 regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME0_REG,
131 SUN6I_DPHY_TX_TIME0_LP_CLK_DIV(14) |
132 SUN6I_DPHY_TX_TIME0_HS_PREPARE(6) |
133 SUN6I_DPHY_TX_TIME0_HS_TRAIL(10));
134
135 regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME1_REG,
136 SUN6I_DPHY_TX_TIME1_CLK_PREPARE(7) |
137 SUN6I_DPHY_TX_TIME1_CLK_ZERO(50) |
138 SUN6I_DPHY_TX_TIME1_CLK_PRE(3) |
139 SUN6I_DPHY_TX_TIME1_CLK_POST(10));
140
141 regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME2_REG,
142 SUN6I_DPHY_TX_TIME2_CLK_TRAIL(30));
143
144 regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME3_REG, 0);
145
146 regmap_write(dphy->regs, SUN6I_DPHY_TX_TIME4_REG,
147 SUN6I_DPHY_TX_TIME4_HS_TX_ANA0(3) |
148 SUN6I_DPHY_TX_TIME4_HS_TX_ANA1(3));
149
150 regmap_write(dphy->regs, SUN6I_DPHY_GCTL_REG,
151 SUN6I_DPHY_GCTL_LANE_NUM(dphy->config.lanes) |
152 SUN6I_DPHY_GCTL_EN);
153
154 regmap_write(dphy->regs, SUN6I_DPHY_ANA0_REG,
155 SUN6I_DPHY_ANA0_REG_PWS |
156 SUN6I_DPHY_ANA0_REG_DMPC |
157 SUN6I_DPHY_ANA0_REG_SLV(7) |
158 SUN6I_DPHY_ANA0_REG_DMPD(lanes_mask) |
159 SUN6I_DPHY_ANA0_REG_DEN(lanes_mask));
160
161 regmap_write(dphy->regs, SUN6I_DPHY_ANA1_REG,
162 SUN6I_DPHY_ANA1_REG_CSMPS(1) |
163 SUN6I_DPHY_ANA1_REG_SVTT(7));
164
165 regmap_write(dphy->regs, SUN6I_DPHY_ANA4_REG,
166 SUN6I_DPHY_ANA4_REG_CKDV(1) |
167 SUN6I_DPHY_ANA4_REG_TMSC(1) |
168 SUN6I_DPHY_ANA4_REG_TMSD(1) |
169 SUN6I_DPHY_ANA4_REG_TXDNSC(1) |
170 SUN6I_DPHY_ANA4_REG_TXDNSD(1) |
171 SUN6I_DPHY_ANA4_REG_TXPUSC(1) |
172 SUN6I_DPHY_ANA4_REG_TXPUSD(1) |
173 SUN6I_DPHY_ANA4_REG_DMPLVC |
174 SUN6I_DPHY_ANA4_REG_DMPLVD(lanes_mask));
175
176 regmap_write(dphy->regs, SUN6I_DPHY_ANA2_REG,
177 SUN6I_DPHY_ANA2_REG_ENIB);
178 udelay(5);
179
180 regmap_write(dphy->regs, SUN6I_DPHY_ANA3_REG,
181 SUN6I_DPHY_ANA3_EN_LDOR |
182 SUN6I_DPHY_ANA3_EN_LDOC |
183 SUN6I_DPHY_ANA3_EN_LDOD);
184 udelay(1);
185
186 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA3_REG,
187 SUN6I_DPHY_ANA3_EN_VTTC |
188 SUN6I_DPHY_ANA3_EN_VTTD_MASK,
189 SUN6I_DPHY_ANA3_EN_VTTC |
190 SUN6I_DPHY_ANA3_EN_VTTD(lanes_mask));
191 udelay(1);
192
193 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA3_REG,
194 SUN6I_DPHY_ANA3_EN_DIV,
195 SUN6I_DPHY_ANA3_EN_DIV);
196 udelay(1);
197
198 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
199 SUN6I_DPHY_ANA2_EN_CK_CPU,
200 SUN6I_DPHY_ANA2_EN_CK_CPU);
201 udelay(1);
202
203 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA1_REG,
204 SUN6I_DPHY_ANA1_REG_VTTMODE,
205 SUN6I_DPHY_ANA1_REG_VTTMODE);
206
207 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA2_REG,
208 SUN6I_DPHY_ANA2_EN_P2S_CPU_MASK,
209 SUN6I_DPHY_ANA2_EN_P2S_CPU(lanes_mask));
210
211 return 0;
212 }
213
214 static int sun6i_dphy_power_off(struct phy *phy)
215 {
216 struct sun6i_dphy *dphy = phy_get_drvdata(phy);
217
218 regmap_update_bits(dphy->regs, SUN6I_DPHY_ANA1_REG,
219 SUN6I_DPHY_ANA1_REG_VTTMODE, 0);
220
221 return 0;
222 }
223
224 static int sun6i_dphy_exit(struct phy *phy)
225 {
226 struct sun6i_dphy *dphy = phy_get_drvdata(phy);
227
228 clk_rate_exclusive_put(dphy->mod_clk);
229 clk_disable_unprepare(dphy->mod_clk);
230 reset_control_assert(dphy->reset);
231
232 return 0;
233 }
234
235
236 static struct phy_ops sun6i_dphy_ops = {
237 .configure = sun6i_dphy_configure,
238 .power_on = sun6i_dphy_power_on,
239 .power_off = sun6i_dphy_power_off,
240 .init = sun6i_dphy_init,
241 .exit = sun6i_dphy_exit,
242 };
243
244 static struct regmap_config sun6i_dphy_regmap_config = {
245 .reg_bits = 32,
246 .val_bits = 32,
247 .reg_stride = 4,
248 .max_register = SUN6I_DPHY_DBG5_REG,
249 .name = "mipi-dphy",
250 };
251
252 static int sun6i_dphy_probe(struct platform_device *pdev)
253 {
254 struct phy_provider *phy_provider;
255 struct sun6i_dphy *dphy;
256 struct resource *res;
257 void __iomem *regs;
258
259 dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
260 if (!dphy)
261 return -ENOMEM;
262
263 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
264 regs = devm_ioremap_resource(&pdev->dev, res);
265 if (IS_ERR(regs)) {
266 dev_err(&pdev->dev, "Couldn't map the DPHY encoder registers\n");
267 return PTR_ERR(regs);
268 }
269
270 dphy->regs = devm_regmap_init_mmio_clk(&pdev->dev, "bus",
271 regs, &sun6i_dphy_regmap_config);
272 if (IS_ERR(dphy->regs)) {
273 dev_err(&pdev->dev, "Couldn't create the DPHY encoder regmap\n");
274 return PTR_ERR(dphy->regs);
275 }
276
277 dphy->reset = devm_reset_control_get_shared(&pdev->dev, NULL);
278 if (IS_ERR(dphy->reset)) {
279 dev_err(&pdev->dev, "Couldn't get our reset line\n");
280 return PTR_ERR(dphy->reset);
281 }
282
283 dphy->mod_clk = devm_clk_get(&pdev->dev, "mod");
284 if (IS_ERR(dphy->mod_clk)) {
285 dev_err(&pdev->dev, "Couldn't get the DPHY mod clock\n");
286 return PTR_ERR(dphy->mod_clk);
287 }
288
289 dphy->phy = devm_phy_create(&pdev->dev, NULL, &sun6i_dphy_ops);
290 if (IS_ERR(dphy->phy)) {
291 dev_err(&pdev->dev, "failed to create PHY\n");
292 return PTR_ERR(dphy->phy);
293 }
294
295 phy_set_drvdata(dphy->phy, dphy);
296 phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
297
298 return PTR_ERR_OR_ZERO(phy_provider);
299 }
300
301 static const struct of_device_id sun6i_dphy_of_table[] = {
302 { .compatible = "allwinner,sun6i-a31-mipi-dphy" },
303 { }
304 };
305 MODULE_DEVICE_TABLE(of, sun6i_dphy_of_table);
306
307 static struct platform_driver sun6i_dphy_platform_driver = {
308 .probe = sun6i_dphy_probe,
309 .driver = {
310 .name = "sun6i-mipi-dphy",
311 .of_match_table = sun6i_dphy_of_table,
312 },
313 };
314 module_platform_driver(sun6i_dphy_platform_driver);
315
316 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@bootlin>");
317 MODULE_DESCRIPTION("Allwinner A31 MIPI D-PHY Driver");
318 MODULE_LICENSE("GPL");