1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 *
6 * Based on Rockchip's drivers/power/pmic/pmic_rk808.c:
7 * Copyright (C) 2012 rockchips
8 * zyw <zyw@rock-chips.com>
9 */
10
11 #include <common.h>
12 #include <dm.h>
13 #include <errno.h>
14 #include <power/rk8xx_pmic.h>
15 #include <power/pmic.h>
16 #include <power/regulator.h>
17
18 #ifndef CONFIG_SPL_BUILD
19 #define ENABLE_DRIVER
20 #endif
21
22 /* Field Definitions */
23 #define RK808_BUCK_VSEL_MASK 0x3f
24 #define RK808_BUCK4_VSEL_MASK 0xf
25 #define RK808_LDO_VSEL_MASK 0x1f
26
27 #define RK818_BUCK_VSEL_MASK 0x3f
28 #define RK818_BUCK4_VSEL_MASK 0x1f
29 #define RK818_LDO_VSEL_MASK 0x1f
30 #define RK818_LDO3_ON_VSEL_MASK 0xf
31 #define RK818_BOOST_ON_VSEL_MASK 0xe0
32 #define RK818_USB_ILIM_SEL_MASK 0x0f
33 #define RK818_USB_CHG_SD_VSEL_MASK 0x70
34
35
36 struct rk8xx_reg_info {
37 uint min_uv;
38 uint step_uv;
39 s8 vsel_reg;
40 u8 vsel_mask;
41 };
42
43 static const struct rk8xx_reg_info rk808_buck[] = {
44 { 712500, 12500, REG_BUCK1_ON_VSEL, RK808_BUCK_VSEL_MASK, },
45 { 712500, 12500, REG_BUCK2_ON_VSEL, RK808_BUCK_VSEL_MASK, },
46 { 712500, 12500, -1, RK808_BUCK_VSEL_MASK, },
47 { 1800000, 100000, REG_BUCK4_ON_VSEL, RK808_BUCK4_VSEL_MASK, },
48 };
49
50 static const struct rk8xx_reg_info rk818_buck[] = {
51 { 712500, 12500, REG_BUCK1_ON_VSEL, RK818_BUCK_VSEL_MASK, },
52 { 712500, 12500, REG_BUCK2_ON_VSEL, RK818_BUCK_VSEL_MASK, },
53 { 712500, 12500, -1, RK818_BUCK_VSEL_MASK, },
54 { 1800000, 100000, REG_BUCK4_ON_VSEL, RK818_BUCK4_VSEL_MASK, },
55 };
56
57 #ifdef ENABLE_DRIVER
58 static const struct rk8xx_reg_info rk808_ldo[] = {
59 { 1800000, 100000, REG_LDO1_ON_VSEL, RK808_LDO_VSEL_MASK, },
60 { 1800000, 100000, REG_LDO2_ON_VSEL, RK808_LDO_VSEL_MASK, },
61 { 800000, 100000, REG_LDO3_ON_VSEL, RK808_BUCK4_VSEL_MASK, },
62 { 1800000, 100000, REG_LDO4_ON_VSEL, RK808_LDO_VSEL_MASK, },
63 { 1800000, 100000, REG_LDO5_ON_VSEL, RK808_LDO_VSEL_MASK, },
64 { 800000, 100000, REG_LDO6_ON_VSEL, RK808_LDO_VSEL_MASK, },
65 { 800000, 100000, REG_LDO7_ON_VSEL, RK808_LDO_VSEL_MASK, },
66 { 1800000, 100000, REG_LDO8_ON_VSEL, RK808_LDO_VSEL_MASK, },
67 };
68
69 static const struct rk8xx_reg_info rk818_ldo[] = {
70 { 1800000, 100000, REG_LDO1_ON_VSEL, RK818_LDO_VSEL_MASK, },
71 { 1800000, 100000, REG_LDO2_ON_VSEL, RK818_LDO_VSEL_MASK, },
72 { 800000, 100000, REG_LDO3_ON_VSEL, RK818_LDO3_ON_VSEL_MASK, },
73 { 1800000, 100000, REG_LDO4_ON_VSEL, RK818_LDO_VSEL_MASK, },
74 { 1800000, 100000, REG_LDO5_ON_VSEL, RK818_LDO_VSEL_MASK, },
75 { 800000, 100000, REG_LDO6_ON_VSEL, RK818_LDO_VSEL_MASK, },
76 { 800000, 100000, REG_LDO7_ON_VSEL, RK818_LDO_VSEL_MASK, },
77 { 1800000, 100000, REG_LDO8_ON_VSEL, RK818_LDO_VSEL_MASK, },
78 };
79 #endif
80
81 static const u16 rk818_chrg_cur_input_array[] = {
82 450, 800, 850, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000
83 };
84
85 static const uint rk818_chrg_shutdown_vsel_array[] = {
86 2780000, 2850000, 2920000, 2990000, 3060000, 3130000, 3190000, 3260000
87 };
88
get_buck_reg(struct udevice * pmic,int num)89 static const struct rk8xx_reg_info *get_buck_reg(struct udevice *pmic,
90 int num)
91 {
92 struct rk8xx_priv *priv = dev_get_priv(pmic);
93 switch (priv->variant) {
94 case RK818_ID:
95 return &rk818_buck[num];
96 default:
97 return &rk808_buck[num];
98 }
99 }
100
_buck_set_value(struct udevice * pmic,int buck,int uvolt)101 static int _buck_set_value(struct udevice *pmic, int buck, int uvolt)
102 {
103 const struct rk8xx_reg_info *info = get_buck_reg(pmic, buck - 1);
104 int mask = info->vsel_mask;
105 int val;
106
107 if (info->vsel_reg == -1)
108 return -ENOSYS;
109 val = (uvolt - info->min_uv) / info->step_uv;
110 debug("%s: reg=%x, mask=%x, val=%x\n", __func__, info->vsel_reg, mask,
111 val);
112
113 return pmic_clrsetbits(pmic, info->vsel_reg, mask, val);
114 }
115
_buck_set_enable(struct udevice * pmic,int buck,bool enable)116 static int _buck_set_enable(struct udevice *pmic, int buck, bool enable)
117 {
118 uint mask;
119 int ret;
120
121 buck--;
122 mask = 1 << buck;
123 if (enable) {
124 ret = pmic_clrsetbits(pmic, REG_DCDC_ILMAX, 0, 3 << (buck * 2));
125 if (ret)
126 return ret;
127 ret = pmic_clrsetbits(pmic, REG_DCDC_UV_ACT, 1 << buck, 0);
128 if (ret)
129 return ret;
130 }
131
132 return pmic_clrsetbits(pmic, REG_DCDC_EN, mask, enable ? mask : 0);
133 }
134
135 #ifdef ENABLE_DRIVER
get_ldo_reg(struct udevice * pmic,int num)136 static const struct rk8xx_reg_info *get_ldo_reg(struct udevice *pmic,
137 int num)
138 {
139 struct rk8xx_priv *priv = dev_get_priv(pmic);
140 switch (priv->variant) {
141 case RK818_ID:
142 return &rk818_ldo[num];
143 default:
144 return &rk808_ldo[num];
145 }
146 }
147
buck_get_value(struct udevice * dev)148 static int buck_get_value(struct udevice *dev)
149 {
150 int buck = dev->driver_data - 1;
151 const struct rk8xx_reg_info *info = get_buck_reg(dev->parent, buck);
152 int mask = info->vsel_mask;
153 int ret, val;
154
155 if (info->vsel_reg == -1)
156 return -ENOSYS;
157 ret = pmic_reg_read(dev->parent, info->vsel_reg);
158 if (ret < 0)
159 return ret;
160 val = ret & mask;
161
162 return info->min_uv + val * info->step_uv;
163 }
164
buck_set_value(struct udevice * dev,int uvolt)165 static int buck_set_value(struct udevice *dev, int uvolt)
166 {
167 int buck = dev->driver_data;
168
169 return _buck_set_value(dev->parent, buck, uvolt);
170 }
171
buck_set_enable(struct udevice * dev,bool enable)172 static int buck_set_enable(struct udevice *dev, bool enable)
173 {
174 int buck = dev->driver_data;
175
176 return _buck_set_enable(dev->parent, buck, enable);
177 }
178
buck_get_enable(struct udevice * dev)179 static int buck_get_enable(struct udevice *dev)
180 {
181 int buck = dev->driver_data - 1;
182 int ret;
183 uint mask;
184
185 mask = 1 << buck;
186
187 ret = pmic_reg_read(dev->parent, REG_DCDC_EN);
188 if (ret < 0)
189 return ret;
190
191 return ret & mask ? true : false;
192 }
193
ldo_get_value(struct udevice * dev)194 static int ldo_get_value(struct udevice *dev)
195 {
196 int ldo = dev->driver_data - 1;
197 const struct rk8xx_reg_info *info = get_ldo_reg(dev->parent, ldo);
198 int mask = info->vsel_mask;
199 int ret, val;
200
201 if (info->vsel_reg == -1)
202 return -ENOSYS;
203 ret = pmic_reg_read(dev->parent, info->vsel_reg);
204 if (ret < 0)
205 return ret;
206 val = ret & mask;
207
208 return info->min_uv + val * info->step_uv;
209 }
210
ldo_set_value(struct udevice * dev,int uvolt)211 static int ldo_set_value(struct udevice *dev, int uvolt)
212 {
213 int ldo = dev->driver_data - 1;
214 const struct rk8xx_reg_info *info = get_ldo_reg(dev->parent, ldo);
215 int mask = info->vsel_mask;
216 int val;
217
218 if (info->vsel_reg == -1)
219 return -ENOSYS;
220 val = (uvolt - info->min_uv) / info->step_uv;
221 debug("%s: reg=%x, mask=%x, val=%x\n", __func__, info->vsel_reg, mask,
222 val);
223
224 return pmic_clrsetbits(dev->parent, info->vsel_reg, mask, val);
225 }
226
ldo_set_enable(struct udevice * dev,bool enable)227 static int ldo_set_enable(struct udevice *dev, bool enable)
228 {
229 int ldo = dev->driver_data - 1;
230 uint mask;
231
232 mask = 1 << ldo;
233
234 return pmic_clrsetbits(dev->parent, REG_LDO_EN, mask,
235 enable ? mask : 0);
236 }
237
ldo_get_enable(struct udevice * dev)238 static int ldo_get_enable(struct udevice *dev)
239 {
240 int ldo = dev->driver_data - 1;
241 int ret;
242 uint mask;
243
244 mask = 1 << ldo;
245
246 ret = pmic_reg_read(dev->parent, REG_LDO_EN);
247 if (ret < 0)
248 return ret;
249
250 return ret & mask ? true : false;
251 }
252
switch_set_enable(struct udevice * dev,bool enable)253 static int switch_set_enable(struct udevice *dev, bool enable)
254 {
255 int sw = dev->driver_data - 1;
256 uint mask;
257
258 mask = 1 << (sw + 5);
259
260 return pmic_clrsetbits(dev->parent, REG_DCDC_EN, mask,
261 enable ? mask : 0);
262 }
263
switch_get_enable(struct udevice * dev)264 static int switch_get_enable(struct udevice *dev)
265 {
266 int sw = dev->driver_data - 1;
267 int ret;
268 uint mask;
269
270 mask = 1 << (sw + 5);
271
272 ret = pmic_reg_read(dev->parent, REG_DCDC_EN);
273 if (ret < 0)
274 return ret;
275
276 return ret & mask ? true : false;
277 }
278
rk8xx_buck_probe(struct udevice * dev)279 static int rk8xx_buck_probe(struct udevice *dev)
280 {
281 struct dm_regulator_uclass_platdata *uc_pdata;
282
283 uc_pdata = dev_get_uclass_platdata(dev);
284
285 uc_pdata->type = REGULATOR_TYPE_BUCK;
286 uc_pdata->mode_count = 0;
287
288 return 0;
289 }
290
rk8xx_ldo_probe(struct udevice * dev)291 static int rk8xx_ldo_probe(struct udevice *dev)
292 {
293 struct dm_regulator_uclass_platdata *uc_pdata;
294
295 uc_pdata = dev_get_uclass_platdata(dev);
296
297 uc_pdata->type = REGULATOR_TYPE_LDO;
298 uc_pdata->mode_count = 0;
299
300 return 0;
301 }
302
rk8xx_switch_probe(struct udevice * dev)303 static int rk8xx_switch_probe(struct udevice *dev)
304 {
305 struct dm_regulator_uclass_platdata *uc_pdata;
306
307 uc_pdata = dev_get_uclass_platdata(dev);
308
309 uc_pdata->type = REGULATOR_TYPE_FIXED;
310 uc_pdata->mode_count = 0;
311
312 return 0;
313 }
314
315 static const struct dm_regulator_ops rk8xx_buck_ops = {
316 .get_value = buck_get_value,
317 .set_value = buck_set_value,
318 .get_enable = buck_get_enable,
319 .set_enable = buck_set_enable,
320 };
321
322 static const struct dm_regulator_ops rk8xx_ldo_ops = {
323 .get_value = ldo_get_value,
324 .set_value = ldo_set_value,
325 .get_enable = ldo_get_enable,
326 .set_enable = ldo_set_enable,
327 };
328
329 static const struct dm_regulator_ops rk8xx_switch_ops = {
330 .get_enable = switch_get_enable,
331 .set_enable = switch_set_enable,
332 };
333
334 U_BOOT_DRIVER(rk8xx_buck) = {
335 .name = "rk8xx_buck",
336 .id = UCLASS_REGULATOR,
337 .ops = &rk8xx_buck_ops,
338 .probe = rk8xx_buck_probe,
339 };
340
341 U_BOOT_DRIVER(rk8xx_ldo) = {
342 .name = "rk8xx_ldo",
343 .id = UCLASS_REGULATOR,
344 .ops = &rk8xx_ldo_ops,
345 .probe = rk8xx_ldo_probe,
346 };
347
348 U_BOOT_DRIVER(rk8xx_switch) = {
349 .name = "rk8xx_switch",
350 .id = UCLASS_REGULATOR,
351 .ops = &rk8xx_switch_ops,
352 .probe = rk8xx_switch_probe,
353 };
354 #endif
355
rk8xx_spl_configure_buck(struct udevice * pmic,int buck,int uvolt)356 int rk8xx_spl_configure_buck(struct udevice *pmic, int buck, int uvolt)
357 {
358 int ret;
359
360 ret = _buck_set_value(pmic, buck, uvolt);
361 if (ret)
362 return ret;
363
364 return _buck_set_enable(pmic, buck, true);
365 }
366
rk818_spl_configure_usb_input_current(struct udevice * pmic,int current_ma)367 int rk818_spl_configure_usb_input_current(struct udevice *pmic, int current_ma)
368 {
369 uint i;
370
371 for (i = 0; i < ARRAY_SIZE(rk818_chrg_cur_input_array); i++)
372 if (current_ma <= rk818_chrg_cur_input_array[i])
373 break;
374
375 return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_ILIM_SEL_MASK, i);
376 }
377
rk818_spl_configure_usb_chrg_shutdown(struct udevice * pmic,int uvolt)378 int rk818_spl_configure_usb_chrg_shutdown(struct udevice *pmic, int uvolt)
379 {
380 uint i;
381
382 for (i = 0; i < ARRAY_SIZE(rk818_chrg_shutdown_vsel_array); i++)
383 if (uvolt <= rk818_chrg_shutdown_vsel_array[i])
384 break;
385
386 return pmic_clrsetbits(pmic, REG_USB_CTRL, RK818_USB_CHG_SD_VSEL_MASK,
387 i);
388 }
389