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+
15 #include <debug_uart.h>
17 #include <asm/arch/sys_proto.h>
18 #include <linux/sizes.h>
20 #include <asm/omap_common.h>
21 #include <linux/compiler.h>
22 #include <asm/system.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
29 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
31 for (i = 0; i < size; i++, pad++)
32 writew(pad->val, base + pad->offset);
35 static void set_mux_conf_regs(void)
37 switch (omap_hw_init_context()) {
38 case OMAP_INIT_CONTEXT_SPL:
41 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
43 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
44 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
55 /* Read Main ID Register (MIDR) */
56 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
61 static void omap_rev_string(void)
63 u32 omap_rev = omap_revision();
64 u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
65 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
66 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
67 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
71 switch (get_device_type()) {
92 printf("%x-%s ES%x.%x\n", omap_variant, sec_s, major_rev, minor_rev);
95 #ifdef CONFIG_SPL_BUILD
96 void spl_display_print(void)
102 void __weak srcomp_enable(void)
107 * do_board_detect() - Detect board description
109 * Function to detect board description. This is expected to be
110 * overridden in the SoC family board file where desired.
112 void __weak do_board_detect(void)
117 * vcores_init() - Assign omap_vcores based on board
119 * Function to pick the vcores based on board. This is expected to be
120 * overridden in the SoC family board file where desired.
122 void __weak vcores_init(void)
131 * early_system_init - Does Early system initialization.
133 * Does early system init of watchdog, muxing, andclocks
134 * Watchdog disable is done always. For the rest what gets done
135 * depends on the boot mode in which this function is executed when
136 * 1. SPL running from SRAM
137 * 2. U-Boot running from FLASH
138 * 3. U-Boot loaded to SDRAM by SPL
139 * 4. U-Boot loaded to SDRAM by ROM code using the
140 * Configuration Header feature
141 * Please have a look at the respective functions to see what gets
142 * done in each of these cases
143 * This function is called with SRAM stack.
145 void early_system_init(void)
147 init_omap_revision();
150 #ifdef CONFIG_SPL_BUILD
152 force_emif_self_refresh();
156 #ifdef CONFIG_SPL_BUILD
160 setup_early_clocks();
161 #ifdef CONFIG_SPL_BUILD
163 * Save the boot parameters passed from romcode.
164 * We cannot delay the saving further than this,
165 * to prevent overwrites.
167 save_omap_boot_params();
171 #ifdef CONFIG_DEBUG_UART_OMAP
177 #ifdef CONFIG_SPL_BUILD
178 void board_init_f(ulong dummy)
181 #ifdef CONFIG_BOARD_EARLY_INIT_F
182 board_early_init_f();
184 /* For regular u-boot sdram_init() is called from dram_init() */
186 gd->ram_size = omap_sdram_size();
190 int arch_cpu_init_dm(void)
197 * Routine: wait_for_command_complete
198 * Description: Wait for posting to finish on watchdog
200 void wait_for_command_complete(struct watchdog *wd_base)
204 pending = readl(&wd_base->wwps);
209 * Routine: watchdog_init
210 * Description: Shut down watch dogs
212 void watchdog_init(void)
214 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
216 writel(WD_UNLOCK1, &wd2_base->wspr);
217 wait_for_command_complete(wd2_base);
218 writel(WD_UNLOCK2, &wd2_base->wspr);
223 * This function finds the SDRAM size available in the system
224 * based on DMM section configurations
225 * This is needed because the size of memory installed may be
226 * different on different versions of the board
228 u32 omap_sdram_size(void)
230 u32 section, i, valid;
231 u64 sdram_start = 0, sdram_end = 0, addr,
232 size, total_size = 0, trap_size = 0, trap_start = 0;
234 for (i = 0; i < 4; i++) {
235 section = __raw_readl(DMM_BASE + i*4);
236 valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
237 (EMIF_SDRC_ADDRSPC_SHIFT);
238 addr = section & EMIF_SYS_ADDR_MASK;
240 /* See if the address is valid */
241 if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
242 (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
243 size = ((section & EMIF_SYS_SIZE_MASK) >>
244 EMIF_SYS_SIZE_SHIFT);
248 if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
249 if (!sdram_start || (addr < sdram_start))
251 if (!sdram_end || ((addr + size) > sdram_end))
252 sdram_end = addr + size;
260 if ((trap_start >= sdram_start) && (trap_start < sdram_end))
261 total_size = (sdram_end - sdram_start) - (trap_size);
263 total_size = sdram_end - sdram_start;
271 * Description: sets uboots idea of sdram size
276 gd->ram_size = omap_sdram_size();
281 * Print board information
285 puts(sysinfo.board_string);
289 #if defined(CONFIG_DISPLAY_CPUINFO)
291 * Print CPU information
293 int print_cpuinfo(void)