1 /*
2  *  Copyright (C) 2010 Samsung Electronics
3  *  Minkyu Kang <mk7.kang@samsung.com>
4  *  Kyungmin Park <kyungmin.park@samsung.com>
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of
12  * the License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22  * MA 02111-1307 USA
23  */
24 
25 #include <common.h>
26 #include <asm/io.h>
27 #include <asm/arch/adc.h>
28 #include <asm/arch/gpio.h>
29 #include <asm/arch/mmc.h>
30 #include <pmic.h>
31 
32 DECLARE_GLOBAL_DATA_PTR;
33 
34 struct s5pc210_gpio_part1 *gpio1;
35 struct s5pc210_gpio_part2 *gpio2;
36 unsigned int board_rev;
37 
38 u32 get_board_rev(void)
39 {
40 	return board_rev;
41 }
42 
43 static int get_hwrev(void)
44 {
45 	return board_rev & 0xFF;
46 }
47 
48 static void check_hw_revision(void);
49 
50 int board_init(void)
51 {
52 	gpio1 = (struct s5pc210_gpio_part1 *) S5PC210_GPIO_PART1_BASE;
53 	gpio2 = (struct s5pc210_gpio_part2 *) S5PC210_GPIO_PART2_BASE;
54 
55 	gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210;
56 	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
57 
58 	check_hw_revision();
59 	printf("HW Revision:\t0x%x\n", board_rev);
60 
61 #if defined(CONFIG_PMIC)
62 	pmic_init();
63 #endif
64 
65 	return 0;
66 }
67 
68 int dram_init(void)
69 {
70 	gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE) +
71 		get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
72 
73 	return 0;
74 }
75 
76 void dram_init_banksize(void)
77 {
78 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
79 	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
80 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
81 	gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
82 }
83 
84 static unsigned short get_adc_value(int channel)
85 {
86 	struct s5p_adc *adc = (struct s5p_adc *)samsung_get_base_adc();
87 	unsigned short ret = 0;
88 	unsigned int reg;
89 	unsigned int loop = 0;
90 
91 	writel(channel & 0xF, &adc->adcmux);
92 	writel((1 << 14) | (49 << 6), &adc->adccon);
93 	writel(1000 & 0xffff, &adc->adcdly);
94 	writel(readl(&adc->adccon) | (1 << 16), &adc->adccon); /* 12 bit */
95 	udelay(10);
96 	writel(readl(&adc->adccon) | (1 << 0), &adc->adccon); /* Enable */
97 	udelay(10);
98 
99 	do {
100 		udelay(1);
101 		reg = readl(&adc->adccon);
102 	} while (!(reg & (1 << 15)) && (loop++ < 1000));
103 
104 	ret = readl(&adc->adcdat0) & 0xFFF;
105 
106 	return ret;
107 }
108 
109 static unsigned int get_hw_revision(void)
110 {
111 	int hwrev, mode0, mode1;
112 
113 	mode0 = get_adc_value(1);		/* HWREV_MODE0 */
114 	mode1 = get_adc_value(2);		/* HWREV_MODE1 */
115 
116 	/*
117 	 * XXX Always set the default hwrev as the latest board
118 	 * ADC = (voltage) / 3.3 * 4096
119 	 */
120 	hwrev = 3;
121 
122 #define IS_RANGE(x, min, max)	((x) > (min) && (x) < (max))
123 	if (IS_RANGE(mode0, 80, 200) && IS_RANGE(mode1, 80, 200))
124 		hwrev = 0x0;		/* 0.01V	0.01V */
125 	if (IS_RANGE(mode0, 750, 1000) && IS_RANGE(mode1, 80, 200))
126 		hwrev = 0x1;		/* 610mV	0.01V */
127 	if (IS_RANGE(mode0, 1300, 1700) && IS_RANGE(mode1, 80, 200))
128 		hwrev = 0x2;		/* 1.16V	0.01V */
129 	if (IS_RANGE(mode0, 2000, 2400) && IS_RANGE(mode1, 80, 200))
130 		hwrev = 0x3;		/* 1.79V	0.01V */
131 #undef IS_RANGE
132 
133 	debug("mode0: %d, mode1: %d, hwrev 0x%x\n", mode0, mode1, hwrev);
134 
135 	return hwrev;
136 }
137 
138 static void check_hw_revision(void)
139 {
140 	int hwrev;
141 
142 	hwrev = get_hw_revision();
143 
144 	board_rev |= hwrev;
145 }
146 
147 #ifdef CONFIG_DISPLAY_BOARDINFO
148 int checkboard(void)
149 {
150 	puts("Board:\tUniversal C210\n");
151 	return 0;
152 }
153 #endif
154 
155 #ifdef CONFIG_GENERIC_MMC
156 int board_mmc_init(bd_t *bis)
157 {
158 	int i, err;
159 
160 	switch (get_hwrev()) {
161 	case 0:
162 		/*
163 		 * Set the low to enable LDO_EN
164 		 * But when you use the test board for eMMC booting
165 		 * you should set it HIGH since it removes the inverter
166 		 */
167 		/* MASSMEMORY_EN: XMDMDATA_6: GPE3[6] */
168 		s5p_gpio_direction_output(&gpio1->e3, 6, 0);
169 		break;
170 	default:
171 		/*
172 		 * Default reset state is High and there's no inverter
173 		 * But set it as HIGH to ensure
174 		 */
175 		/* MASSMEMORY_EN: XMDMADDR_3: GPE1[3] */
176 		s5p_gpio_direction_output(&gpio1->e1, 3, 1);
177 		break;
178 	}
179 
180 	/*
181 	 * eMMC GPIO:
182 	 * SDR 8-bit@48MHz at MMC0
183 	 * GPK0[0]	SD_0_CLK(2)
184 	 * GPK0[1]	SD_0_CMD(2)
185 	 * GPK0[2]	SD_0_CDn	-> Not used
186 	 * GPK0[3:6]	SD_0_DATA[0:3](2)
187 	 * GPK1[3:6]	SD_0_DATA[0:3](3)
188 	 *
189 	 * DDR 4-bit@26MHz at MMC4
190 	 * GPK0[0]	SD_4_CLK(3)
191 	 * GPK0[1]	SD_4_CMD(3)
192 	 * GPK0[2]	SD_4_CDn	-> Not used
193 	 * GPK0[3:6]	SD_4_DATA[0:3](3)
194 	 * GPK1[3:6]	SD_4_DATA[4:7](4)
195 	 */
196 	for (i = 0; i < 7; i++) {
197 		if (i == 2)
198 			continue;
199 		/* GPK0[0:6] special function 2 */
200 		s5p_gpio_cfg_pin(&gpio2->k0, i, 0x2);
201 		/* GPK0[0:6] pull disable */
202 		s5p_gpio_set_pull(&gpio2->k0, i, GPIO_PULL_NONE);
203 		/* GPK0[0:6] drv 4x */
204 		s5p_gpio_set_drv(&gpio2->k0, i, GPIO_DRV_4X);
205 	}
206 
207 	for (i = 3; i < 7; i++) {
208 		/* GPK1[3:6] special function 3 */
209 		s5p_gpio_cfg_pin(&gpio2->k1, i, 0x3);
210 		/* GPK1[3:6] pull disable */
211 		s5p_gpio_set_pull(&gpio2->k1, i, GPIO_PULL_NONE);
212 		/* GPK1[3:6] drv 4x */
213 		s5p_gpio_set_drv(&gpio2->k1, i, GPIO_DRV_4X);
214 	}
215 
216 	/* T-flash detect */
217 	s5p_gpio_cfg_pin(&gpio2->x3, 4, 0xf);
218 	s5p_gpio_set_pull(&gpio2->x3, 4, GPIO_PULL_UP);
219 
220 	/*
221 	 * MMC device init
222 	 * mmc0	 : eMMC (8-bit buswidth)
223 	 * mmc2	 : SD card (4-bit buswidth)
224 	 */
225 	err = s5p_mmc_init(0, 8);
226 
227 	/*
228 	 * Check the T-flash  detect pin
229 	 * GPX3[4] T-flash detect pin
230 	 */
231 	if (!s5p_gpio_get_value(&gpio2->x3, 4)) {
232 		/*
233 		 * SD card GPIO:
234 		 * GPK2[0]	SD_2_CLK(2)
235 		 * GPK2[1]	SD_2_CMD(2)
236 		 * GPK2[2]	SD_2_CDn	-> Not used
237 		 * GPK2[3:6]	SD_2_DATA[0:3](2)
238 		 */
239 		for (i = 0; i < 7; i++) {
240 			if (i == 2)
241 				continue;
242 			/* GPK2[0:6] special function 2 */
243 			s5p_gpio_cfg_pin(&gpio2->k2, i, 0x2);
244 			/* GPK2[0:6] pull disable */
245 			s5p_gpio_set_pull(&gpio2->k2, i, GPIO_PULL_NONE);
246 			/* GPK2[0:6] drv 4x */
247 			s5p_gpio_set_drv(&gpio2->k2, i, GPIO_DRV_4X);
248 		}
249 		err = s5p_mmc_init(2, 4);
250 	}
251 
252 	return err;
253 
254 }
255 #endif
256