1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2010 Samsung Electronics
4 * Minkyu Kang <mk7.kang@samsung.com>
5 * Kyungmin Park <kyungmin.park@samsung.com>
12 #include <asm/global_data.h>
15 #include <asm/arch/adc.h>
16 #include <asm/arch/pinmux.h>
17 #include <asm/arch/watchdog.h>
18 #include <linux/delay.h>
19 #include <power/pmic.h>
21 #include <usb/dwc2_udc.h>
22 #include <asm/arch/cpu.h>
23 #include <power/max8998_pmic.h>
25 #include <samsung/misc.h>
26 #include <usb_mass_storage.h>
27 #include <asm/mach-types.h>
29 DECLARE_GLOBAL_DATA_PTR;
31 unsigned int board_rev;
32 static int init_pmic_lcd(void);
34 #ifdef CONFIG_REVISION_TAG
35 u32 get_board_rev(void)
41 int exynos_power_init(void)
43 return init_pmic_lcd();
46 static int get_hwrev(void)
48 return board_rev & 0xFF;
51 static unsigned short get_adc_value(int channel)
53 struct s5p_adc *adc = (struct s5p_adc *)samsung_get_base_adc();
54 unsigned short ret = 0;
56 unsigned int loop = 0;
58 writel(channel & 0xF, &adc->adcmux);
59 writel((1 << 14) | (49 << 6), &adc->adccon);
60 writel(1000 & 0xffff, &adc->adcdly);
61 writel(readl(&adc->adccon) | (1 << 16), &adc->adccon); /* 12 bit */
63 writel(readl(&adc->adccon) | (1 << 0), &adc->adccon); /* Enable */
68 reg = readl(&adc->adccon);
69 } while (!(reg & (1 << 15)) && (loop++ < 1000));
71 ret = readl(&adc->adcdat0) & 0xFFF;
76 static int adc_power_control(int on)
82 ret = pmic_get("max8998-pmic", &dev);
84 puts("Failed to get MAX8998!\n");
88 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
94 ret = pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
96 puts("MAX8998 LDO setting error\n");
103 static unsigned int get_hw_revision(void)
105 int hwrev, mode0, mode1;
107 adc_power_control(1);
109 mode0 = get_adc_value(1); /* HWREV_MODE0 */
110 mode1 = get_adc_value(2); /* HWREV_MODE1 */
113 * XXX Always set the default hwrev as the latest board
114 * ADC = (voltage) / 3.3 * 4096
118 #define IS_RANGE(x, min, max) ((x) > (min) && (x) < (max))
119 if (IS_RANGE(mode0, 80, 200) && IS_RANGE(mode1, 80, 200))
120 hwrev = 0x0; /* 0.01V 0.01V */
121 if (IS_RANGE(mode0, 750, 1000) && IS_RANGE(mode1, 80, 200))
122 hwrev = 0x1; /* 610mV 0.01V */
123 if (IS_RANGE(mode0, 1300, 1700) && IS_RANGE(mode1, 80, 200))
124 hwrev = 0x2; /* 1.16V 0.01V */
125 if (IS_RANGE(mode0, 2000, 2400) && IS_RANGE(mode1, 80, 200))
126 hwrev = 0x3; /* 1.79V 0.01V */
129 debug("mode0: %d, mode1: %d, hwrev 0x%x\n", mode0, mode1, hwrev);
131 adc_power_control(0);
136 static void check_hw_revision(void)
140 hwrev = get_hw_revision();
145 #ifdef CONFIG_USB_GADGET
146 static int s5pc210_phy_control(int on)
152 ret = pmic_get("max8998-pmic", &dev);
154 puts("Failed to get MAX8998!\n");
159 reg = pmic_reg_read(dev, MAX8998_REG_BUCK_ACTIVE_DISCHARGE3);
160 reg |= MAX8998_SAFEOUT1;
161 ret |= pmic_reg_write(dev,
162 MAX8998_REG_BUCK_ACTIVE_DISCHARGE3, reg);
164 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
166 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
168 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF2);
170 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, reg);
173 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF2);
174 reg &= ~MAX8998_LDO8;
175 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, reg);
177 reg = pmic_reg_read(dev, MAX8998_REG_ONOFF1);
178 reg &= ~MAX8998_LDO3;
179 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, reg);
181 reg = pmic_reg_read(dev, MAX8998_REG_BUCK_ACTIVE_DISCHARGE3);
182 reg &= ~MAX8998_SAFEOUT1;
183 ret |= pmic_reg_write(dev,
184 MAX8998_REG_BUCK_ACTIVE_DISCHARGE3, reg);
188 puts("MAX8998 LDO setting error!\n");
195 struct dwc2_plat_otg_data s5pc210_otg_data = {
196 .phy_control = s5pc210_phy_control,
197 .regs_phy = EXYNOS4_USBPHY_BASE,
198 .regs_otg = EXYNOS4_USBOTG_BASE,
199 .usb_phy_ctrl = EXYNOS4_USBPHY_CONTROL,
200 .usb_flags = PHY0_SLEEP,
204 int board_usb_init(int index, enum usb_init_type init)
206 debug("USB_udc_probe\n");
207 return dwc2_udc_probe(&s5pc210_otg_data);
210 int exynos_early_init_f(void)
217 static int init_pmic_lcd(void)
223 ret = pmic_get("max8998-pmic", &dev);
225 puts("Failed to get MAX8998 for init_pmic_lcd()!\n");
230 val = 0x02; /* (1800 - 1600) / 100; */
231 ret |= pmic_reg_write(dev, MAX8998_REG_LDO7, val);
234 val = 0xe; /* (3000 - 1600) / 100; */
235 ret |= pmic_reg_write(dev, MAX8998_REG_LDO17, val);
237 /* Disable unneeded regulators */
240 * Buck1 ON, Buck2 OFF, Buck3 ON, Buck4 ON
241 * LDO2 ON, LDO3 OFF, LDO4 OFF, LDO5 ON
244 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF1, val);
247 * LDO6 OFF, LDO7 ON, LDO8 OFF, LDO9 ON,
248 * LDO10 OFF, LDO11 OFF, LDO12 OFF, LDO13 OFF
251 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF2, val);
254 * LDO14 OFF, LDO15 OFF, LGO16 OFF, LDO17 OFF
255 * EPWRHOLD OFF, EBATTMON OFF, ELBCNFG2 OFF, ELBCNFG1 OFF
258 ret |= pmic_reg_write(dev, MAX8998_REG_ONOFF3, val);
261 puts("LCD pmic initialisation error!\n");
268 int exynos_init(void)
270 gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210;
272 switch (get_hwrev()) {
275 * Set the low to enable LDO_EN
276 * But when you use the test board for eMMC booting
277 * you should set it HIGH since it removes the inverter
279 /* MASSMEMORY_EN: XMDMDATA_6: GPE3[6] */
280 gpio_request(EXYNOS4_GPIO_E36, "ldo_en");
281 gpio_direction_output(EXYNOS4_GPIO_E36, 0);
285 * Default reset state is High and there's no inverter
286 * But set it as HIGH to ensure
288 /* MASSMEMORY_EN: XMDMADDR_3: GPE1[3] */
289 gpio_request(EXYNOS4_GPIO_E13, "massmemory_en");
290 gpio_direction_output(EXYNOS4_GPIO_E13, 1);
295 printf("HW Revision:\t0x%x\n", board_rev);