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u8500: Enabling power to MMC device on AB8500 V2
[u-boot] / board / st-ericsson / snowball / snowball.c
1 /*
2  * Copyright (C) ST-Ericsson SA 2009
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17  */
18
19 #include <config.h>
20 #include <common.h>
21 #include <malloc.h>
22 #include <i2c.h>
23 #include <mmc.h>
24 #include <asm/types.h>
25 #include <asm/io.h>
26 #include <asm/errno.h>
27 #include <asm/arch/db8500_pincfg.h>
28 #include <asm/arch/prcmu.h>
29 #include <asm/arch/hardware.h>
30 #include <asm/arch/sys_proto.h>
31
32 #include "db8500_pins.h"
33
34 /*
35  * Get a global data pointer
36  */
37 DECLARE_GLOBAL_DATA_PTR;
38
39 /*
40  * Memory controller register
41  */
42 #define DMC_BASE_ADDR                   0x80156000
43 #define DMC_CTL_97                      (DMC_BASE_ADDR + 0x184)
44
45 /*
46  * GPIO pin config common for MOP500/HREF boards
47  */
48 unsigned long gpio_cfg_common[] = {
49         /* I2C */
50         GPIO147_I2C0_SCL,
51         GPIO148_I2C0_SDA,
52         GPIO16_I2C1_SCL,
53         GPIO17_I2C1_SDA,
54         GPIO10_I2C2_SDA,
55         GPIO11_I2C2_SCL,
56         GPIO229_I2C3_SDA,
57         GPIO230_I2C3_SCL,
58
59         /* SSP0, to AB8500 */
60         GPIO143_SSP0_CLK,
61         GPIO144_SSP0_FRM,
62         GPIO145_SSP0_RXD | PIN_PULL_DOWN,
63         GPIO146_SSP0_TXD,
64
65         /* MMC0 (MicroSD card) */
66         GPIO18_MC0_CMDDIR       | PIN_OUTPUT_HIGH,
67         GPIO19_MC0_DAT0DIR      | PIN_OUTPUT_HIGH,
68         GPIO20_MC0_DAT2DIR      | PIN_OUTPUT_HIGH,
69         GPIO21_MC0_DAT31DIR     | PIN_OUTPUT_HIGH,
70         GPIO22_MC0_FBCLK        | PIN_INPUT_NOPULL,
71         GPIO23_MC0_CLK          | PIN_OUTPUT_LOW,
72         GPIO24_MC0_CMD          | PIN_INPUT_PULLUP,
73         GPIO25_MC0_DAT0         | PIN_INPUT_PULLUP,
74         GPIO26_MC0_DAT1         | PIN_INPUT_PULLUP,
75         GPIO27_MC0_DAT2         | PIN_INPUT_PULLUP,
76         GPIO28_MC0_DAT3         | PIN_INPUT_PULLUP,
77
78         /* MMC4 (On-board eMMC) */
79         GPIO197_MC4_DAT3        | PIN_INPUT_PULLUP,
80         GPIO198_MC4_DAT2        | PIN_INPUT_PULLUP,
81         GPIO199_MC4_DAT1        | PIN_INPUT_PULLUP,
82         GPIO200_MC4_DAT0        | PIN_INPUT_PULLUP,
83         GPIO201_MC4_CMD         | PIN_INPUT_PULLUP,
84         GPIO202_MC4_FBCLK       | PIN_INPUT_NOPULL,
85         GPIO203_MC4_CLK         | PIN_OUTPUT_LOW,
86         GPIO204_MC4_DAT7        | PIN_INPUT_PULLUP,
87         GPIO205_MC4_DAT6        | PIN_INPUT_PULLUP,
88         GPIO206_MC4_DAT5        | PIN_INPUT_PULLUP,
89         GPIO207_MC4_DAT4        | PIN_INPUT_PULLUP,
90
91         /* UART2, console */
92         GPIO29_U2_RXD   | PIN_INPUT_PULLUP,
93         GPIO30_U2_TXD   | PIN_OUTPUT_HIGH,
94         GPIO31_U2_CTSn  | PIN_INPUT_PULLUP,
95         GPIO32_U2_RTSn  | PIN_OUTPUT_HIGH,
96
97         /*
98          * USB, pin 256-267 USB, Is probably already setup correctly from
99          * BootROM/boot stages, but we don't trust that and set it up anyway
100          */
101         GPIO256_USB_NXT,
102         GPIO257_USB_STP,
103         GPIO258_USB_XCLK,
104         GPIO259_USB_DIR,
105         GPIO260_USB_DAT7,
106         GPIO261_USB_DAT6,
107         GPIO262_USB_DAT5,
108         GPIO263_USB_DAT4,
109         GPIO264_USB_DAT3,
110         GPIO265_USB_DAT2,
111         GPIO266_USB_DAT1,
112         GPIO267_USB_DAT0,
113 };
114
115 unsigned long gpio_cfg_snowball[] = {
116         /* MMC0 (MicroSD card) */
117         GPIO217_GPIO    | PIN_OUTPUT_HIGH,      /* MMC_EN */
118         GPIO218_GPIO    | PIN_INPUT_NOPULL,     /* MMC_CD */
119         GPIO228_GPIO    | PIN_OUTPUT_HIGH,      /* SD_SEL */
120
121         /* eMMC */
122         GPIO167_GPIO    | PIN_OUTPUT_HIGH,      /* RSTn_MLC */
123
124         /* LAN */
125         GPIO131_SM_ADQ8,
126         GPIO132_SM_ADQ9,
127         GPIO133_SM_ADQ10,
128         GPIO134_SM_ADQ11,
129         GPIO135_SM_ADQ12,
130         GPIO136_SM_ADQ13,
131         GPIO137_SM_ADQ14,
132         GPIO138_SM_ADQ15,
133
134         /* RSTn_LAN */
135         GPIO141_GPIO    | PIN_OUTPUT_HIGH,
136 };
137
138 /*
139  * Miscellaneous platform dependent initialisations
140  */
141
142 int board_init(void)
143 {
144         /*
145          * Setup board (bd) and board-info (bi).
146          * bi_arch_number: Unique id for this board. It will passed in r1 to
147          *    Linux startup code and is the machine_id.
148          * bi_boot_params: Where this board expects params.
149          */
150         gd->bd->bi_arch_number = MACH_TYPE_SNOWBALL;
151         gd->bd->bi_boot_params = 0x00000100;
152
153         /* Configure GPIO pins needed by U-boot */
154         db8500_gpio_config_pins(gpio_cfg_common, ARRAY_SIZE(gpio_cfg_common));
155
156         db8500_gpio_config_pins(gpio_cfg_snowball,
157                                                 ARRAY_SIZE(gpio_cfg_snowball));
158
159         return 0;
160 }
161
162 int dram_init(void)
163 {
164         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
165         gd->ram_size = gd->bd->bi_dram[0].size =
166                 get_ram_size(CONFIG_SYS_SDRAM_BASE, CONFIG_SYS_MAX_RAM_SIZE);
167
168         return 0;
169 }
170
171 static int raise_ab8500_gpio16(void)
172 {
173         int ret;
174
175         /* selection */
176         ret = ab8500_read(AB8500_MISC, AB8500_GPIO_SEL2_REG);
177         if (ret < 0)
178                 goto out;
179
180         ret |= 0x80;
181         ret = ab8500_write(AB8500_MISC, AB8500_GPIO_SEL2_REG, ret);
182         if (ret < 0)
183                 goto out;
184
185         /* direction */
186         ret = ab8500_read(AB8500_MISC, AB8500_GPIO_DIR2_REG);
187         if (ret < 0)
188                 goto out;
189
190         ret |= 0x80;
191         ret = ab8500_write(AB8500_MISC, AB8500_GPIO_DIR2_REG, ret);
192         if (ret < 0)
193                 goto out;
194
195         /* out */
196         ret = ab8500_read(AB8500_MISC, AB8500_GPIO_OUT2_REG);
197         if (ret < 0)
198                 goto out;
199
200         ret |= 0x80;
201         ret = ab8500_write(AB8500_MISC, AB8500_GPIO_OUT2_REG, ret);
202
203 out:
204         return ret;
205 }
206
207 static int raise_ab8500_gpio26(void)
208 {
209         int ret;
210
211         /* selection */
212         ret = ab8500_read(AB8500_MISC, AB8500_GPIO_DIR4_REG);
213         if (ret < 0)
214                 goto out;
215
216         ret |= 0x2;
217         ret = ab8500_write(AB8500_MISC, AB8500_GPIO_DIR4_REG, ret);
218         if (ret < 0)
219                 goto out;
220
221         /* out */
222         ret = ab8500_read(AB8500_MISC, AB8500_GPIO_OUT4_REG);
223         if (ret < 0)
224                 goto out;
225
226         ret |= 0x2;
227         ret = ab8500_write(AB8500_MISC, AB8500_GPIO_OUT4_REG, ret);
228
229 out:
230         return ret;
231 }
232
233 int board_late_init(void)
234 {
235         /* enable 3V3 for LAN controller */
236         if (raise_ab8500_gpio26() >= 0) {
237                 /* Turn on FSMC device */
238                 writel(0x1, 0x8000f000);
239                 writel(0x1, 0x8000f008);
240
241                 /* setup FSMC for LAN controler */
242                 writel(0x305b, 0x80000000);
243
244                 /* run at the highest possible speed */
245                 writel(0x01010210, 0x80000004);
246         } else
247                 printf("error: can't raise GPIO26\n");
248
249         /* enable 3v6 for GBF chip */
250         if ((raise_ab8500_gpio16() < 0))
251                 printf("error: cant' raise GPIO16\n");
252
253 #ifdef CONFIG_MMC
254         u8500_mmc_power_init();
255 #endif /* CONFIG_MMC */
256
257         return 0;
258 }