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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
4150f242 SL |
2 | /* |
3 | * Copyright 2013 Freescale Semiconductor, Inc. | |
4150f242 SL |
4 | */ |
5 | ||
6 | /* Power-One ZM7300 DPM */ | |
7 | #include "zm7300.h" | |
8 | ||
9 | #define DPM_WP 0x96 | |
10 | #define WRP_OPCODE 0x01 | |
11 | #define WRM_OPCODE 0x02 | |
12 | #define RRP_OPCODE 0x11 | |
13 | ||
14 | #define DPM_SUCCESS 0x01 | |
15 | #define DPM_EXEC_FAIL 0x00 | |
16 | ||
17 | static const uint16_t hex_to_1_10mv[] = { | |
18 | 5000, | |
19 | 5125, | |
20 | 5250, | |
21 | 5375, | |
22 | 5500, | |
23 | 5625, | |
24 | 5750, | |
25 | 5875, | |
26 | 6000, | |
27 | 6125, | |
28 | 6250, | |
29 | 6375, | |
30 | 6500, | |
31 | 6625, | |
32 | 6750, | |
33 | 6875, | |
34 | 7000, | |
35 | 7125, | |
36 | 7250, | |
37 | 7375, | |
38 | 7500, | |
39 | 7625, | |
40 | 7750, | |
41 | 7875, | |
42 | 8000, | |
43 | 8125, | |
44 | 8250, | |
45 | 8375, | |
46 | 8500, | |
47 | 8625, | |
48 | 8750, | |
49 | 8875, | |
50 | 9000, | |
51 | 9125, | |
52 | 9250, | |
53 | 9375, | |
54 | 9500, /* 0.95mV */ | |
55 | 9625, | |
56 | 9750, | |
57 | 9875, | |
58 | 10000, /* 1.0V */ | |
59 | 10125, | |
60 | 10250, | |
61 | 10375, | |
62 | 10500, | |
63 | 10625, | |
64 | 10750, | |
65 | 10875, | |
66 | 11000, | |
67 | 11125, | |
68 | 11250, | |
69 | 11375, | |
70 | 11500, | |
71 | 11625, | |
72 | 11750, | |
73 | 11875, | |
74 | 12000, | |
75 | 12125, | |
76 | 12250, | |
77 | 12375, | |
78 | 0, /* reserved */ | |
79 | }; | |
80 | ||
81 | ||
82 | /* Read Data d from Register r of POL p */ | |
83 | u8 dpm_rrp(uchar r) | |
84 | { | |
85 | u8 ret[5]; | |
86 | ||
87 | ret[0] = RRP_OPCODE; | |
88 | /* POL is 0 */ | |
89 | ret[1] = 0; | |
90 | ret[2] = r; | |
91 | i2c_read(I2C_DPM_ADDR, 0, -3, ret, 2); | |
92 | if (ret[1] == DPM_SUCCESS) { /* the DPM returned success as status */ | |
93 | debug("RRP_OPCODE returned success data is %x\n", ret[0]); | |
94 | return ret[0]; | |
95 | } else { | |
96 | return -1; | |
97 | } | |
98 | } | |
99 | ||
100 | /* Write Data d into DPM register r (RAM) */ | |
101 | int dpm_wrm(u8 r, u8 d) | |
102 | { | |
103 | u8 ret[5]; | |
104 | ||
105 | ret[0] = WRM_OPCODE; | |
106 | ret[1] = r; | |
107 | ret[2] = d; | |
108 | i2c_read(I2C_DPM_ADDR, 0, -3, ret, 1); | |
109 | if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */ | |
110 | debug("WRM_OPCODE returned success data is %x\n", ret[0]); | |
111 | return ret[0]; | |
112 | } else { | |
113 | return -1; | |
114 | } | |
115 | } | |
116 | ||
117 | /* Write Data d into Register r of POL(s) a */ | |
118 | int dpm_wrp(u8 r, u8 d) | |
119 | { | |
120 | u8 ret[7]; | |
121 | ||
122 | ret[0] = WRP_OPCODE; | |
123 | /* only POL0 is present */ | |
124 | ret[1] = 0x01; | |
125 | ret[2] = 0x00; | |
126 | ret[3] = 0x00; | |
127 | ret[4] = 0x00; | |
128 | ret[5] = r; | |
129 | ret[6] = d; | |
130 | i2c_read(I2C_DPM_ADDR, 0, -7, ret, 1); | |
131 | if (ret[0] == DPM_SUCCESS) { /* the DPM returned success as status */ | |
132 | debug("WRP_OPCODE returned success data is %x\n", ret[0]); | |
133 | return 0; | |
134 | } else { | |
135 | return -1; | |
136 | } | |
137 | } | |
138 | ||
139 | /* Uses the DPM command RRP */ | |
140 | u8 zm_read(uchar reg) | |
141 | { | |
63a7578e | 142 | return dpm_rrp(reg); |
4150f242 SL |
143 | } |
144 | ||
145 | /* ZM_write -- | |
146 | Steps: | |
147 | a. Write data to the register | |
148 | b. Read data from register and compare to written value | |
149 | c. Return return_code & voltage_read | |
150 | */ | |
151 | u8 zm_write(u8 reg, u8 data) | |
152 | { | |
153 | u8 d; | |
154 | ||
155 | /* write data to register */ | |
156 | dpm_wrp(reg, data); | |
157 | ||
158 | /* read register and compare to written value */ | |
159 | d = dpm_rrp(reg); | |
160 | if (d != data) { | |
161 | printf("zm_write : Comparison register data failed\n"); | |
162 | return -1; | |
163 | } | |
164 | ||
165 | return d; | |
166 | } | |
167 | ||
168 | /* zm_write_out_voltage | |
169 | * voltage in 1/10 mV | |
170 | */ | |
171 | int zm_write_voltage(int voltage) | |
172 | { | |
173 | u8 reg = 0x7, vid; | |
174 | uint16_t voltage_read; | |
175 | u8 ret; | |
176 | ||
177 | vid = (voltage - 5000) / ZM_STEP; | |
178 | ||
179 | ret = zm_write(reg, vid); | |
180 | if (ret != -1) { | |
181 | voltage_read = hex_to_1_10mv[ret]; | |
182 | debug("voltage set to %dmV\n", voltage_read/10); | |
183 | return voltage_read; | |
184 | } | |
185 | return -1; | |
186 | } | |
187 | ||
188 | /* zm_read_out_voltage | |
189 | * voltage in 1/10 mV | |
190 | */ | |
191 | int zm_read_voltage(void) | |
192 | { | |
193 | u8 reg = 0x7; | |
194 | u8 ret; | |
195 | int voltage; | |
196 | ||
197 | ret = zm_read(reg); | |
198 | if (ret != -1) { | |
199 | voltage = hex_to_1_10mv[ret]; | |
200 | debug("Voltage read is %dmV\n", voltage/10); | |
201 | return voltage; | |
202 | } else { | |
203 | return -1; | |
204 | } | |
205 | } | |
206 | ||
207 | int zm_disable_wp() | |
208 | { | |
209 | u8 new_wp_value; | |
210 | ||
211 | /* Disable using Write-Protect register 0x96 */ | |
212 | new_wp_value = 0x8; | |
213 | if ((dpm_wrm(DPM_WP, new_wp_value)) < 0) { | |
214 | printf("Disable Write-Protect register failed\n"); | |
215 | return -1; | |
216 | } | |
217 | return 0; | |
218 | } | |
219 | ||
220 | int zm_enable_wp() | |
221 | { | |
222 | u8 orig_wp_value; | |
223 | orig_wp_value = 0x0; | |
224 | ||
225 | /* Enable using Write-Protect register 0x96 */ | |
226 | if ((dpm_wrm(DPM_WP, orig_wp_value)) < 0) { | |
227 | printf("Enable Write-Protect register failed\n"); | |
228 | return -1; | |
229 | } | |
230 | return 0; | |
231 | } | |
232 |