1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Intel Bay Trail Crystal Cove PMIC operation region driver
4 *
5 * Copyright (C) 2014 Intel Corporation. All rights reserved.
6 */
7
8 #include <linux/acpi.h>
9 #include <linux/init.h>
10 #include <linux/mfd/intel_soc_pmic.h>
11 #include <linux/platform_device.h>
12 #include <linux/regmap.h>
13 #include "intel_pmic.h"
14
15 #define PWR_SOURCE_SELECT BIT(1)
16
17 #define PMIC_A0LOCK_REG 0xc5
18
19 static struct pmic_table power_table[] = {
20 /* {
21 .address = 0x00,
22 .reg = ??,
23 .bit = ??,
24 }, ** VSYS */
25 {
26 .address = 0x04,
27 .reg = 0x63,
28 .bit = 0x00,
29 }, /* SYSX -> VSYS_SX */
30 {
31 .address = 0x08,
32 .reg = 0x62,
33 .bit = 0x00,
34 }, /* SYSU -> VSYS_U */
35 {
36 .address = 0x0c,
37 .reg = 0x64,
38 .bit = 0x00,
39 }, /* SYSS -> VSYS_S */
40 {
41 .address = 0x10,
42 .reg = 0x6a,
43 .bit = 0x00,
44 }, /* V50S -> V5P0S */
45 {
46 .address = 0x14,
47 .reg = 0x6b,
48 .bit = 0x00,
49 }, /* HOST -> VHOST, USB2/3 host */
50 {
51 .address = 0x18,
52 .reg = 0x6c,
53 .bit = 0x00,
54 }, /* VBUS -> VBUS, USB2/3 OTG */
55 {
56 .address = 0x1c,
57 .reg = 0x6d,
58 .bit = 0x00,
59 }, /* HDMI -> VHDMI */
60 /* {
61 .address = 0x20,
62 .reg = ??,
63 .bit = ??,
64 }, ** S285 */
65 {
66 .address = 0x24,
67 .reg = 0x66,
68 .bit = 0x00,
69 }, /* X285 -> V2P85SX, camera */
70 /* {
71 .address = 0x28,
72 .reg = ??,
73 .bit = ??,
74 }, ** V33A */
75 {
76 .address = 0x2c,
77 .reg = 0x69,
78 .bit = 0x00,
79 }, /* V33S -> V3P3S, display/ssd/audio */
80 {
81 .address = 0x30,
82 .reg = 0x68,
83 .bit = 0x00,
84 }, /* V33U -> V3P3U, SDIO wifi&bt */
85 /* {
86 .address = 0x34 .. 0x40,
87 .reg = ??,
88 .bit = ??,
89 }, ** V33I, V18A, REFQ, V12A */
90 {
91 .address = 0x44,
92 .reg = 0x5c,
93 .bit = 0x00,
94 }, /* V18S -> V1P8S, SOC/USB PHY/SIM */
95 {
96 .address = 0x48,
97 .reg = 0x5d,
98 .bit = 0x00,
99 }, /* V18X -> V1P8SX, eMMC/camara/audio */
100 {
101 .address = 0x4c,
102 .reg = 0x5b,
103 .bit = 0x00,
104 }, /* V18U -> V1P8U, LPDDR */
105 {
106 .address = 0x50,
107 .reg = 0x61,
108 .bit = 0x00,
109 }, /* V12X -> V1P2SX, SOC SFR */
110 {
111 .address = 0x54,
112 .reg = 0x60,
113 .bit = 0x00,
114 }, /* V12S -> V1P2S, MIPI */
115 /* {
116 .address = 0x58,
117 .reg = ??,
118 .bit = ??,
119 }, ** V10A */
120 {
121 .address = 0x5c,
122 .reg = 0x56,
123 .bit = 0x00,
124 }, /* V10S -> V1P0S, SOC GFX */
125 {
126 .address = 0x60,
127 .reg = 0x57,
128 .bit = 0x00,
129 }, /* V10X -> V1P0SX, SOC display/DDR IO/PCIe */
130 {
131 .address = 0x64,
132 .reg = 0x59,
133 .bit = 0x00,
134 }, /* V105 -> V1P05S, L2 SRAM */
135 };
136
137 static struct pmic_table thermal_table[] = {
138 {
139 .address = 0x00,
140 .reg = 0x75
141 },
142 {
143 .address = 0x04,
144 .reg = 0x95
145 },
146 {
147 .address = 0x08,
148 .reg = 0x97
149 },
150 {
151 .address = 0x0c,
152 .reg = 0x77
153 },
154 {
155 .address = 0x10,
156 .reg = 0x9a
157 },
158 {
159 .address = 0x14,
160 .reg = 0x9c
161 },
162 {
163 .address = 0x18,
164 .reg = 0x79
165 },
166 {
167 .address = 0x1c,
168 .reg = 0x9f
169 },
170 {
171 .address = 0x20,
172 .reg = 0xa1
173 },
174 {
175 .address = 0x48,
176 .reg = 0x94
177 },
178 {
179 .address = 0x4c,
180 .reg = 0x99
181 },
182 {
183 .address = 0x50,
184 .reg = 0x9e
185 },
186 };
187
intel_crc_pmic_get_power(struct regmap * regmap,int reg,int bit,u64 * value)188 static int intel_crc_pmic_get_power(struct regmap *regmap, int reg,
189 int bit, u64 *value)
190 {
191 int data;
192
193 if (regmap_read(regmap, reg, &data))
194 return -EIO;
195
196 *value = (data & PWR_SOURCE_SELECT) && (data & BIT(bit)) ? 1 : 0;
197 return 0;
198 }
199
intel_crc_pmic_update_power(struct regmap * regmap,int reg,int bit,bool on)200 static int intel_crc_pmic_update_power(struct regmap *regmap, int reg,
201 int bit, bool on)
202 {
203 int data;
204
205 if (regmap_read(regmap, reg, &data))
206 return -EIO;
207
208 if (on) {
209 data |= PWR_SOURCE_SELECT | BIT(bit);
210 } else {
211 data &= ~BIT(bit);
212 data |= PWR_SOURCE_SELECT;
213 }
214
215 if (regmap_write(regmap, reg, data))
216 return -EIO;
217 return 0;
218 }
219
intel_crc_pmic_get_raw_temp(struct regmap * regmap,int reg)220 static int intel_crc_pmic_get_raw_temp(struct regmap *regmap, int reg)
221 {
222 int temp_l, temp_h;
223
224 /*
225 * Raw temperature value is 10bits: 8bits in reg
226 * and 2bits in reg-1: bit0,1
227 */
228 if (regmap_read(regmap, reg, &temp_l) ||
229 regmap_read(regmap, reg - 1, &temp_h))
230 return -EIO;
231
232 return temp_l | (temp_h & 0x3) << 8;
233 }
234
intel_crc_pmic_update_aux(struct regmap * regmap,int reg,int raw)235 static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
236 {
237 return regmap_write(regmap, reg, raw) ||
238 regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0;
239 }
240
intel_crc_pmic_get_policy(struct regmap * regmap,int reg,int bit,u64 * value)241 static int intel_crc_pmic_get_policy(struct regmap *regmap,
242 int reg, int bit, u64 *value)
243 {
244 int pen;
245
246 if (regmap_read(regmap, reg, &pen))
247 return -EIO;
248 *value = pen >> 7;
249 return 0;
250 }
251
intel_crc_pmic_update_policy(struct regmap * regmap,int reg,int bit,int enable)252 static int intel_crc_pmic_update_policy(struct regmap *regmap,
253 int reg, int bit, int enable)
254 {
255 int alert0;
256
257 /* Update to policy enable bit requires unlocking a0lock */
258 if (regmap_read(regmap, PMIC_A0LOCK_REG, &alert0))
259 return -EIO;
260
261 if (regmap_update_bits(regmap, PMIC_A0LOCK_REG, 0x01, 0))
262 return -EIO;
263
264 if (regmap_update_bits(regmap, reg, 0x80, enable << 7))
265 return -EIO;
266
267 /* restore alert0 */
268 if (regmap_write(regmap, PMIC_A0LOCK_REG, alert0))
269 return -EIO;
270
271 return 0;
272 }
273
274 static const struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
275 .get_power = intel_crc_pmic_get_power,
276 .update_power = intel_crc_pmic_update_power,
277 .get_raw_temp = intel_crc_pmic_get_raw_temp,
278 .update_aux = intel_crc_pmic_update_aux,
279 .get_policy = intel_crc_pmic_get_policy,
280 .update_policy = intel_crc_pmic_update_policy,
281 .lpat_raw_to_temp = acpi_lpat_raw_to_temp,
282 .power_table = power_table,
283 .power_table_count= ARRAY_SIZE(power_table),
284 .thermal_table = thermal_table,
285 .thermal_table_count = ARRAY_SIZE(thermal_table),
286 };
287
intel_crc_pmic_opregion_probe(struct platform_device * pdev)288 static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
289 {
290 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
291 return intel_pmic_install_opregion_handler(&pdev->dev,
292 ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
293 &intel_crc_pmic_opregion_data);
294 }
295
296 static struct platform_driver intel_crc_pmic_opregion_driver = {
297 .probe = intel_crc_pmic_opregion_probe,
298 .driver = {
299 .name = "byt_crystal_cove_pmic",
300 },
301 };
302 builtin_platform_driver(intel_crc_pmic_opregion_driver);
303