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>
34 #include <asm/omap_common.h>
36 DECLARE_GLOBAL_DATA_PTR;
39 * This is used to verify if the configuration header
40 * was executed by rom code prior to control of transfer
41 * to the bootloader. SPL is responsible for saving and
42 * passing the boot_params pointer to the u-boot.
44 struct omap_boot_parameters boot_params __attribute__ ((section(".data")));
46 #ifdef CONFIG_SPL_BUILD
48 * We use static variables because global data is not ready yet.
49 * Initialized data is available in SPL right from the beginning.
50 * We would not typically need to save these parameters in regular
51 * U-Boot. This is needed only in SPL at the moment.
53 u32 omap_bootmode = MMCSD_MODE_FAT;
55 u32 omap_boot_device(void)
57 return (u32) (boot_params.omap_bootdevice);
60 u32 omap_boot_mode(void)
66 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
69 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
71 for (i = 0; i < size; i++, pad++)
72 writew(pad->val, base + pad->offset);
75 static void set_mux_conf_regs(void)
77 switch (omap_hw_init_context()) {
78 case OMAP_INIT_CONTEXT_SPL:
79 set_muxconf_regs_essential();
81 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
82 #ifdef CONFIG_SYS_ENABLE_PADS_ALL
83 set_muxconf_regs_non_essential();
86 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
87 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
88 set_muxconf_regs_essential();
89 #ifdef CONFIG_SYS_ENABLE_PADS_ALL
90 set_muxconf_regs_non_essential();
101 /* Read Main ID Register (MIDR) */
102 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
107 void omap_rev_string(char *omap_rev_string)
109 u32 omap_rev = omap_revision();
110 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
111 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
112 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
114 sprintf(omap_rev_string, "OMAP%x ES%x.%x", omap_variant, major_rev,
118 #ifdef CONFIG_SPL_BUILD
119 static void init_boot_params(void)
121 boot_params_ptr = (u32 *) &boot_params;
127 * Description: Does early system init of watchdog, muxing, andclocks
128 * Watchdog disable is done always. For the rest what gets done
129 * depends on the boot mode in which this function is executed
130 * 1. s_init of SPL running from SRAM
131 * 2. s_init of U-Boot running from FLASH
132 * 3. s_init of U-Boot loaded to SDRAM by SPL
133 * 4. s_init of U-Boot loaded to SDRAM by ROM code using the
134 * Configuration Header feature
135 * Please have a look at the respective functions to see what gets
136 * done in each of these cases
137 * This function is called with SRAM stack.
141 init_omap_revision();
144 #ifdef CONFIG_SPL_BUILD
145 setup_clocks_for_console();
146 preloader_console_init();
150 #ifdef CONFIG_SPL_BUILD
151 /* For regular u-boot sdram_init() is called from dram_init() */
158 * Routine: wait_for_command_complete
159 * Description: Wait for posting to finish on watchdog
161 void wait_for_command_complete(struct watchdog *wd_base)
165 pending = readl(&wd_base->wwps);
170 * Routine: watchdog_init
171 * Description: Shut down watch dogs
173 void watchdog_init(void)
175 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
177 writel(WD_UNLOCK1, &wd2_base->wspr);
178 wait_for_command_complete(wd2_base);
179 writel(WD_UNLOCK2, &wd2_base->wspr);
184 * This function finds the SDRAM size available in the system
185 * based on DMM section configurations
186 * This is needed because the size of memory installed may be
187 * different on different versions of the board
189 u32 omap_sdram_size(void)
191 u32 section, i, total_size = 0, size, addr;
193 for (i = 0; i < 4; i++) {
194 section = __raw_readl(DMM_BASE + i*4);
195 addr = section & EMIF_SYS_ADDR_MASK;
196 /* See if the address is valid */
197 if ((addr >= DRAM_ADDR_SPACE_START) &&
198 (addr < DRAM_ADDR_SPACE_END)) {
199 size = ((section & EMIF_SYS_SIZE_MASK) >>
200 EMIF_SYS_SIZE_SHIFT);
213 * Description: sets uboots idea of sdram size
218 gd->ram_size = omap_sdram_size();
223 * Print board information
227 puts(sysinfo.board_string);
232 * This function is called by start_armboot. You can reliably use static
233 * data. Any boot-time function that require static data should be
236 int arch_cpu_init(void)
242 * get_device_type(): tell if GP/HS/EMU/TST
244 u32 get_device_type(void)
250 * Print CPU information
252 int print_cpuinfo(void)
254 char rev_string_buffer[50];
256 omap_rev_string(rev_string_buffer);
257 printf("CPU : %s\n", rev_string_buffer);
261 #ifndef CONFIG_SYS_DCACHE_OFF
262 void enable_caches(void)
264 /* Enable D-cache. I-cache is already enabled in start.S */