3 * Common functions for OMAP4/5 based boards
6 * Texas Instruments, <www.ti.com>
9 * Aneesh V <aneesh@ti.com>
10 * Steve Sakoman <steve@sakoman.com>
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/arch/sys_proto.h>
32 #include <asm/sizes.h>
35 DECLARE_GLOBAL_DATA_PTR;
37 #ifdef CONFIG_SPL_BUILD
39 * We use static variables because global data is not ready yet.
40 * Initialized data is available in SPL right from the beginning.
41 * We would not typically need to save these parameters in regular
42 * U-Boot. This is needed only in SPL at the moment.
44 u32 omap_bootdevice = BOOT_DEVICE_MMC1;
45 u32 omap_bootmode = MMCSD_MODE_FAT;
47 u32 omap_boot_device(void)
49 return omap_bootdevice;
52 u32 omap_boot_mode(void)
58 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
61 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
63 for (i = 0; i < size; i++, pad++)
64 writew(pad->val, base + pad->offset);
67 static void set_mux_conf_regs(void)
69 switch (omap_hw_init_context()) {
70 case OMAP_INIT_CONTEXT_SPL:
71 set_muxconf_regs_essential();
73 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
74 set_muxconf_regs_non_essential();
76 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
77 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
78 set_muxconf_regs_essential();
79 set_muxconf_regs_non_essential();
89 /* Read Main ID Register (MIDR) */
90 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
95 void omap_rev_string(char *omap_rev_string)
97 u32 omap_rev = omap_revision();
98 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
99 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
100 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
102 sprintf(omap_rev_string, "OMAP%x ES%x.%x", omap_variant, major_rev,
108 * Description: Does early system init of watchdog, muxing, andclocks
109 * Watchdog disable is done always. For the rest what gets done
110 * depends on the boot mode in which this function is executed
111 * 1. s_init of SPL running from SRAM
112 * 2. s_init of U-Boot running from FLASH
113 * 3. s_init of U-Boot loaded to SDRAM by SPL
114 * 4. s_init of U-Boot loaded to SDRAM by ROM code using the
115 * Configuration Header feature
116 * Please have a look at the respective functions to see what gets
117 * done in each of these cases
118 * This function is called with SRAM stack.
122 init_omap_revision();
125 #ifdef CONFIG_SPL_BUILD
126 setup_clocks_for_console();
127 preloader_console_init();
131 #ifdef CONFIG_SPL_BUILD
132 /* For regular u-boot sdram_init() is called from dram_init() */
138 * Routine: wait_for_command_complete
139 * Description: Wait for posting to finish on watchdog
141 void wait_for_command_complete(struct watchdog *wd_base)
145 pending = readl(&wd_base->wwps);
150 * Routine: watchdog_init
151 * Description: Shut down watch dogs
153 void watchdog_init(void)
155 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
157 writel(WD_UNLOCK1, &wd2_base->wspr);
158 wait_for_command_complete(wd2_base);
159 writel(WD_UNLOCK2, &wd2_base->wspr);
164 * This function finds the SDRAM size available in the system
165 * based on DMM section configurations
166 * This is needed because the size of memory installed may be
167 * different on different versions of the board
169 u32 omap_sdram_size(void)
171 u32 section, i, total_size = 0, size, addr;
173 for (i = 0; i < 4; i++) {
174 section = __raw_readl(DMM_BASE + i*4);
175 addr = section & EMIF_SYS_ADDR_MASK;
176 /* See if the address is valid */
177 if ((addr >= DRAM_ADDR_SPACE_START) &&
178 (addr < DRAM_ADDR_SPACE_END)) {
179 size = ((section & EMIF_SYS_SIZE_MASK) >>
180 EMIF_SYS_SIZE_SHIFT);
193 * Description: sets uboots idea of sdram size
198 gd->ram_size = omap_sdram_size();
203 * Print board information
207 puts(sysinfo.board_string);
212 * This function is called by start_armboot. You can reliably use static
213 * data. Any boot-time function that require static data should be
216 int arch_cpu_init(void)
222 * get_device_type(): tell if GP/HS/EMU/TST
224 u32 get_device_type(void)
230 * Print CPU information
232 int print_cpuinfo(void)
234 char rev_string_buffer[50];
236 omap_rev_string(rev_string_buffer);
237 printf("CPU : %s\n", rev_string_buffer);
241 #ifndef CONFIG_SYS_DCACHE_OFF
242 void enable_caches(void)
244 /* Enable D-cache. I-cache is already enabled in start.S */