1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2010 Samsung Electronics
4 * Minkyu Kang <mk7.kang@samsung.com>
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 */
7
8 #include <env.h>
9 #include <log.h>
10 #include <spi.h>
11 #include <asm/global_data.h>
12 #include <asm/io.h>
13 #include <asm/gpio.h>
14 #include <asm/arch/adc.h>
15 #include <asm/arch/pinmux.h>
16 #include <asm/arch/watchdog.h>
17 #include <linux/delay.h>
18 #include <power/pmic.h>
19 #include <usb.h>
20 #include <usb/dwc2_udc.h>
21 #include <asm/arch/cpu.h>
22 #include <power/max8998_pmic.h>
23 #include <libtizen.h>
24 #include <samsung/misc.h>
25 #include <usb_mass_storage.h>
26 #include <asm/mach-types.h>
27
28 DECLARE_GLOBAL_DATA_PTR;
29
30 unsigned int board_rev;
31 static int init_pmic_lcd(void);
32
33 #ifdef CONFIG_REVISION_TAG
get_board_rev(void)34 u32 get_board_rev(void)
35 {
36 return board_rev;
37 }
38 #endif
39
exynos_power_init(void)40 int exynos_power_init(void)
41 {
42 return init_pmic_lcd();
43 }
44
get_hwrev(void)45 static int get_hwrev(void)
46 {
47 return board_rev & 0xFF;
48 }
49
get_adc_value(int channel)50 static unsigned short get_adc_value(int channel)
51 {
52 struct s5p_adc *adc = (struct s5p_adc *)samsung_get_base_adc();
53 unsigned short ret = 0;
54 unsigned int reg;
55 unsigned int loop = 0;
56
57 writel(channel & 0xF, &adc->adcmux);
58 writel((1 << 14) | (49 << 6), &adc->adccon);
59 writel(1000 & 0xffff, &adc->adcdly);
60 writel(readl(&adc->adccon) | (1 << 16), &adc->adccon); /* 12 bit */
61 udelay(10);
62 writel(readl(&adc->adccon) | (1 << 0), &adc->adccon); /* Enable */
63 udelay(10);
64
65 do {
66 udelay(1);
67 reg = readl(&adc->adccon);
68 } while (!(reg & (1 << 15)) && (loop++ < 1000));
69
70 ret = readl(&adc->adcdat0) & 0xFFF;
71
72 return ret;
73 }
74
adc_power_control(int on)75 static int adc_power_control(int on)
76 {
77 struct udevice *dev;
78 int ret;
79 u8 reg;
80
81 ret = pmic_get("max8998-pmic", &dev);
82 if (ret) {
83 puts("Failed to get MAX8998!\n");
84 return ret;
85 }
86
87 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
88 if (on)
89 reg |= MAX8998_LDO4;
90 else
91 reg &= ~MAX8998_LDO4;
92
93 ret = pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
94 if (ret) {
95 puts("MAX8998 LDO setting error\n");
96 return -EINVAL;
97 }
98
99 return 0;
100 }
101
get_hw_revision(void)102 static unsigned int get_hw_revision(void)
103 {
104 int hwrev, mode0, mode1;
105
106 adc_power_control(1);
107
108 mode0 = get_adc_value(1); /* HWREV_MODE0 */
109 mode1 = get_adc_value(2); /* HWREV_MODE1 */
110
111 /*
112 * XXX Always set the default hwrev as the latest board
113 * ADC = (voltage) / 3.3 * 4096
114 */
115 hwrev = 3;
116
117 #define IS_RANGE(x, min, max) ((x) > (min) && (x) < (max))
118 if (IS_RANGE(mode0, 80, 200) && IS_RANGE(mode1, 80, 200))
119 hwrev = 0x0; /* 0.01V 0.01V */
120 if (IS_RANGE(mode0, 750, 1000) && IS_RANGE(mode1, 80, 200))
121 hwrev = 0x1; /* 610mV 0.01V */
122 if (IS_RANGE(mode0, 1300, 1700) && IS_RANGE(mode1, 80, 200))
123 hwrev = 0x2; /* 1.16V 0.01V */
124 if (IS_RANGE(mode0, 2000, 2400) && IS_RANGE(mode1, 80, 200))
125 hwrev = 0x3; /* 1.79V 0.01V */
126 #undef IS_RANGE
127
128 debug("mode0: %d, mode1: %d, hwrev 0x%x\n", mode0, mode1, hwrev);
129
130 adc_power_control(0);
131
132 return hwrev;
133 }
134
check_hw_revision(void)135 static void check_hw_revision(void)
136 {
137 int hwrev;
138
139 hwrev = get_hw_revision();
140
141 board_rev |= hwrev;
142 }
143
144 #ifdef CONFIG_USB_GADGET
s5pc210_phy_control(int on)145 static int s5pc210_phy_control(int on)
146 {
147 struct udevice *dev;
148 int ret;
149 u8 reg;
150
151 ret = pmic_get("max8998-pmic", &dev);
152 if (ret) {
153 puts("Failed to get MAX8998!\n");
154 return ret;
155 }
156
157 if (on) {
158 reg = pmic_reg_read(dev, MAX8998_REG_BUCK_ACTIVE_DISCHARGE3);
159 reg |= MAX8998_SAFEOUT1;
160 ret |= pmic_reg_write(dev,
161 MAX8998_REG_BUCK_ACTIVE_DISCHARGE3, reg);
162
163 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
164 reg |= MAX8998_LDO3;
165 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
166
167 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF2);
168 reg |= MAX8998_LDO8;
169 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, reg);
170
171 } else {
172 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF2);
173 reg &= ~MAX8998_LDO8;
174 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, reg);
175
176 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
177 reg &= ~MAX8998_LDO3;
178 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
179
180 reg = pmic_reg_read(dev, MAX8998_REG_BUCK_ACTIVE_DISCHARGE3);
181 reg &= ~MAX8998_SAFEOUT1;
182 ret |= pmic_reg_write(dev,
183 MAX8998_REG_BUCK_ACTIVE_DISCHARGE3, reg);
184 }
185
186 if (ret) {
187 puts("MAX8998 LDO setting error!\n");
188 return -EINVAL;
189 }
190
191 return 0;
192 }
193
194 struct dwc2_plat_otg_data s5pc210_otg_data = {
195 .phy_control = s5pc210_phy_control,
196 .regs_phy = EXYNOS4_USBPHY_BASE,
197 .regs_otg = EXYNOS4_USBOTG_BASE,
198 .usb_phy_ctrl = EXYNOS4_USBPHY_CONTROL,
199 .usb_flags = PHY0_SLEEP,
200 };
201 #endif
202
board_usb_init(int index,enum usb_init_type init)203 int board_usb_init(int index, enum usb_init_type init)
204 {
205 debug("USB_udc_probe\n");
206 return dwc2_udc_probe(&s5pc210_otg_data);
207 }
208
exynos_early_init_f(void)209 int exynos_early_init_f(void)
210 {
211 wdt_stop();
212
213 return 0;
214 }
215
init_pmic_lcd(void)216 static int init_pmic_lcd(void)
217 {
218 struct udevice *dev;
219 unsigned char val;
220 int ret = 0;
221
222 ret = pmic_get("max8998-pmic", &dev);
223 if (ret) {
224 puts("Failed to get MAX8998 for init_pmic_lcd()!\n");
225 return ret;
226 }
227
228 /* LDO7 1.8V */
229 val = 0x02; /* (1800 - 1600) / 100; */
230 ret |= pmic_reg_write(dev, MAX8998_REG_LDO7, val);
231
232 /* LDO17 3.0V */
233 val = 0xe; /* (3000 - 1600) / 100; */
234 ret |= pmic_reg_write(dev, MAX8998_REG_LDO17, val);
235
236 /* Disable unneeded regulators */
237 /*
238 * ONOFF1
239 * Buck1 ON, Buck2 OFF, Buck3 ON, Buck4 ON
240 * LDO2 ON, LDO3 OFF, LDO4 OFF, LDO5 ON
241 */
242 val = 0xB9;
243 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, val);
244
245 /* ONOFF2
246 * LDO6 OFF, LDO7 ON, LDO8 OFF, LDO9 ON,
247 * LDO10 OFF, LDO11 OFF, LDO12 OFF, LDO13 OFF
248 */
249 val = 0x50;
250 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, val);
251
252 /* ONOFF3
253 * LDO14 OFF, LDO15 OFF, LGO16 OFF, LDO17 OFF
254 * EPWRHOLD OFF, EBATTMON OFF, ELBCNFG2 OFF, ELBCNFG1 OFF
255 */
256 val = 0x00;
257 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF3, val);
258
259 if (ret) {
260 puts("LCD pmic initialisation error!\n");
261 return -EINVAL;
262 }
263
264 return 0;
265 }
266
exynos_init(void)267 void exynos_init(void)
268 {
269 gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210;
270
271 switch (get_hwrev()) {
272 case 0:
273 /*
274 * Set the low to enable LDO_EN
275 * But when you use the test board for eMMC booting
276 * you should set it HIGH since it removes the inverter
277 */
278 /* MASSMEMORY_EN: XMDMDATA_6: GPE3[6] */
279 gpio_request(EXYNOS4_GPIO_E36, "ldo_en");
280 gpio_direction_output(EXYNOS4_GPIO_E36, 0);
281 break;
282 default:
283 /*
284 * Default reset state is High and there's no inverter
285 * But set it as HIGH to ensure
286 */
287 /* MASSMEMORY_EN: XMDMADDR_3: GPE1[3] */
288 gpio_request(EXYNOS4_GPIO_E13, "massmemory_en");
289 gpio_direction_output(EXYNOS4_GPIO_E13, 1);
290 break;
291 }
292
293 check_hw_revision();
294 printf("HW Revision:\t0x%x\n", board_rev);
295 }
296