karo: tx6: add support for TX6 HW Rev. 3
[karo-tx-uboot.git] / board / karo / tx6 / rn5t618.c
1 /*
2  * Copyright (C) 2014 Lothar WaƟmann <LW@KARO-electronics.de>
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  */
17
18 #include <common.h>
19 #include <i2c.h>
20
21 #include "pmic.h"
22
23 #define RN5T618_NOETIMSET       0x11
24 #define RN5T618_LDORTC1_SLOT    0x2a
25 #define RN5T618_DC1CTL          0x2c
26 #define RN5T618_DC1CTL2         0x2d
27 #define RN5T618_DC2CTL          0x2e
28 #define RN5T618_DC2CTL2         0x2f
29 #define RN5T618_DC3CTL          0x30
30 #define RN5T618_DC3CTL2         0x31
31 #define RN5T618_DC1DAC          0x36 /* CORE */
32 #define RN5T618_DC2DAC          0x37 /* SOC */
33 #define RN5T618_DC3DAC          0x38 /* DDR */
34 #define RN5T618_DC1DAC_SLP      0x3b
35 #define RN5T618_DC2DAC_SLP      0x3c
36 #define RN5T618_DC3DAC_SLP      0x3d
37 #define RN5T618_LDOEN1          0x44
38 #define RN5T618_LDODIS          0x46
39 #define RN5T618_LDOEN2          0x48
40 #define RN5T618_LDO3DAC         0x4e /* IO */
41 #define RN5T618_LDORTCDAC       0x56 /* VBACKUP */
42
43 #define VDD_RTC_VAL             mV_to_regval_rtc(3000 * 10)
44 #define VDD_HIGH_VAL            mV_to_regval3(3000 * 10)
45 #define VDD_HIGH_VAL_LP         mV_to_regval3(3000 * 10)
46 #define VDD_CORE_VAL            mV_to_regval(1425 * 10)
47 #define VDD_CORE_VAL_LP         mV_to_regval(900 * 10)
48 #define VDD_SOC_VAL             mV_to_regval(1425 * 10)
49 #define VDD_SOC_VAL_LP          mV_to_regval(900 * 10)
50 #define VDD_DDR_VAL             mV_to_regval(1500 * 10)
51 #define VDD_DDR_VAL_LP          mV_to_regval(1500 * 10)
52
53 /* calculate voltages in 10mV */
54 /* DCDC1-3 */
55 #define mV_to_regval(mV)        DIV_ROUND(((((mV) < 6000) ? 6000 : (mV)) - 6000), 125)
56 #define regval_to_mV(v)         (((v) * 125 + 6000))
57
58 /* LDO1-2 */
59 #define mV_to_regval2(mV)       DIV_ROUND(((((mV) < 9000) ? 9000 : (mV)) - 9000), 250)
60 #define regval2_to_mV(v)        (((v) * 250 + 9000))
61
62 /* LDO3 */
63 #define mV_to_regval3(mV)       DIV_ROUND(((((mV) < 6000) ? 6000 : (mV)) - 6000), 250)
64 #define regval3_to_mV(v)        (((v) * 250 + 6000))
65
66 /* LDORTC */
67 #define mV_to_regval_rtc(mV)    DIV_ROUND(((((mV) < 17000) ? 17000 : (mV)) - 17000), 250)
68 #define regval_rtc_to_mV(v)     (((v) * 250 + 17000))
69
70 static struct rn5t618_regs {
71         u8 addr;
72         u8 val;
73         u8 mask;
74 } rn5t618_regs[] = {
75 #if CONFIG_TX6_REV == 2
76         { RN5T618_NOETIMSET, 0, },
77         { RN5T618_DC1DAC, VDD_CORE_VAL, },
78         { RN5T618_DC2DAC, VDD_SOC_VAL, },
79         { RN5T618_DC3DAC, VDD_DDR_VAL, },
80         { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
81         { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
82         { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
83         { RN5T618_LDOEN1, 0x01f, ~0x1f, },
84         { RN5T618_LDOEN2, 0x10, ~0x30, },
85         { RN5T618_LDODIS, 0x00, },
86         { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
87         { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
88         { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
89 #elif CONFIG_TX6_REV == 3
90         { RN5T618_NOETIMSET, 0, },
91         { RN5T618_DC1DAC, VDD_CORE_VAL, },
92         { RN5T618_DC2DAC, VDD_SOC_VAL, },
93         { RN5T618_DC3DAC, VDD_DDR_VAL, },
94         { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
95         { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
96         { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
97         { RN5T618_LDOEN1, 0x01f, ~0x1f, },
98         { RN5T618_LDOEN2, 0x10, ~0x30, },
99         { RN5T618_LDODIS, 0x00, },
100         { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
101         { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
102         { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
103 #else
104 #error Unsupported TX6 module revision
105 #endif
106 };
107
108 static int rn5t618_setup_regs(struct rn5t618_regs *r, size_t count)
109 {
110         int ret;
111         int i;
112
113         for (i = 0; i < count; i++, r++) {
114                 unsigned char value;
115
116                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
117                 printf("PMIC reg %02x = %02x\n",
118                         r->addr, value);
119         }
120         for (i = 0; i < count; i++, r++) {
121 #ifdef DEBUG
122                 unsigned char value;
123
124                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
125                 if ((value & ~r->mask) != r->val) {
126                         printf("Changing PMIC reg %02x from %02x to %02x\n",
127                                 r->addr, value, r->val);
128                 }
129                 if (ret) {
130                         printf("%s: failed to read PMIC register %02x: %d\n",
131                                 __func__, r->addr, ret);
132                         return ret;
133                 }
134 #endif
135                 ret = i2c_write(CONFIG_SYS_I2C_SLAVE,
136                                 r->addr, 1, &r->val, 1);
137                 if (ret) {
138                         printf("%s: failed to write PMIC register %02x: %d\n",
139                                 __func__, r->addr, ret);
140                         return ret;
141                 }
142 #ifdef DEBUG
143                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
144                 printf("PMIC reg %02x is %02x\n", r->addr, value);
145 #endif
146         }
147         return 0;
148 }
149
150 int setup_pmic_voltages(void)
151 {
152         int ret;
153         unsigned char value;
154
155         ret = i2c_probe(CONFIG_SYS_I2C_SLAVE);
156         if (ret != 0) {
157                 printf("Failed to initialize I2C\n");
158                 return ret;
159         }
160
161         ret = i2c_read(CONFIG_SYS_I2C_SLAVE, 0x11, 1, &value, 1);
162         if (ret) {
163                 printf("%s: i2c_read error: %d\n", __func__, ret);
164                 return ret;
165         }
166
167         ret = rn5t618_setup_regs(rn5t618_regs, ARRAY_SIZE(rn5t618_regs));
168         if (ret)
169                 return ret;
170
171         printf("VDDCORE set to %umV\n",
172                 DIV_ROUND(regval_to_mV(VDD_CORE_VAL), 10));
173         printf("VDDSOC  set to %umV\n",
174                 DIV_ROUND(regval_to_mV(VDD_SOC_VAL), 10));
175
176         return ret;
177 }