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 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/arch/sys_proto.h>
17 #include <linux/sizes.h>
19 #include <asm/omap_common.h>
20 #include <linux/compiler.h>
21 #include <asm/system.h>
23 DECLARE_GLOBAL_DATA_PTR;
25 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
28 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
30 for (i = 0; i < size; i++, pad++)
31 writew(pad->val, base + pad->offset);
34 static void set_mux_conf_regs(void)
36 switch (omap_hw_init_context()) {
37 case OMAP_INIT_CONTEXT_SPL:
40 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
42 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
43 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
54 /* Read Main ID Register (MIDR) */
55 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
60 static void omap_rev_string(void)
62 u32 omap_rev = omap_revision();
63 u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
64 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
65 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
66 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
72 printf("%x ES%x.%x\n", omap_variant, major_rev,
76 #ifdef CONFIG_SPL_BUILD
77 void spl_display_print(void)
83 void __weak srcomp_enable(void)
88 * do_board_detect() - Detect board description
90 * Function to detect board description. This is expected to be
91 * overridden in the SoC family board file where desired.
93 void __weak do_board_detect(void)
102 * early_system_init - Does Early system initialization.
104 * Does early system init of watchdog, muxing, andclocks
105 * Watchdog disable is done always. For the rest what gets done
106 * depends on the boot mode in which this function is executed when
107 * 1. SPL running from SRAM
108 * 2. U-Boot running from FLASH
109 * 3. U-Boot loaded to SDRAM by SPL
110 * 4. U-Boot loaded to SDRAM by ROM code using the
111 * Configuration Header feature
112 * Please have a look at the respective functions to see what gets
113 * done in each of these cases
114 * This function is called with SRAM stack.
116 void early_system_init(void)
118 init_omap_revision();
121 #ifdef CONFIG_SPL_BUILD
123 (is_omap44xx() || (omap_revision() == OMAP5430_ES1_0)))
124 force_emif_self_refresh();
128 #ifdef CONFIG_SPL_BUILD
132 setup_early_clocks();
137 #ifdef CONFIG_SPL_BUILD
138 void board_init_f(ulong dummy)
141 #ifdef CONFIG_BOARD_EARLY_INIT_F
142 board_early_init_f();
144 /* For regular u-boot sdram_init() is called from dram_init() */
149 int arch_cpu_init_dm(void)
156 * Routine: wait_for_command_complete
157 * Description: Wait for posting to finish on watchdog
159 void wait_for_command_complete(struct watchdog *wd_base)
163 pending = readl(&wd_base->wwps);
168 * Routine: watchdog_init
169 * Description: Shut down watch dogs
171 void watchdog_init(void)
173 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
175 writel(WD_UNLOCK1, &wd2_base->wspr);
176 wait_for_command_complete(wd2_base);
177 writel(WD_UNLOCK2, &wd2_base->wspr);
182 * This function finds the SDRAM size available in the system
183 * based on DMM section configurations
184 * This is needed because the size of memory installed may be
185 * different on different versions of the board
187 u32 omap_sdram_size(void)
189 u32 section, i, valid;
190 u64 sdram_start = 0, sdram_end = 0, addr,
191 size, total_size = 0, trap_size = 0, trap_start = 0;
193 for (i = 0; i < 4; i++) {
194 section = __raw_readl(DMM_BASE + i*4);
195 valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
196 (EMIF_SDRC_ADDRSPC_SHIFT);
197 addr = section & EMIF_SYS_ADDR_MASK;
199 /* See if the address is valid */
200 if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
201 (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
202 size = ((section & EMIF_SYS_SIZE_MASK) >>
203 EMIF_SYS_SIZE_SHIFT);
207 if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
208 if (!sdram_start || (addr < sdram_start))
210 if (!sdram_end || ((addr + size) > sdram_end))
211 sdram_end = addr + size;
219 if ((trap_start >= sdram_start) && (trap_start < sdram_end))
220 total_size = (sdram_end - sdram_start) - (trap_size);
222 total_size = sdram_end - sdram_start;
230 * Description: sets uboots idea of sdram size
235 gd->ram_size = omap_sdram_size();
240 * Print board information
244 puts(sysinfo.board_string);
249 * get_device_type(): tell if GP/HS/EMU/TST
251 u32 get_device_type(void)
253 return (readl((*ctrl)->control_status) &
254 (DEVICE_TYPE_MASK)) >> DEVICE_TYPE_SHIFT;
257 #if defined(CONFIG_DISPLAY_CPUINFO)
259 * Print CPU information
261 int print_cpuinfo(void)