3 * Common functions for OMAP4 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/armv7.h>
32 #include <asm/arch/cpu.h>
33 #include <asm/arch/sys_proto.h>
34 #include <asm/sizes.h>
35 #include "omap4_mux_data.h"
37 DECLARE_GLOBAL_DATA_PTR;
39 u32 *const omap4_revision = (u32 *)OMAP4_SRAM_SCRATCH_OMAP4_REV;
41 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
44 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
46 for (i = 0; i < size; i++, pad++)
47 writew(pad->val, base + pad->offset);
50 static void set_muxconf_regs_essential(void)
52 do_set_mux(CONTROL_PADCONF_CORE, core_padconf_array_essential,
53 sizeof(core_padconf_array_essential) /
54 sizeof(struct pad_conf_entry));
56 do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential,
57 sizeof(wkup_padconf_array_essential) /
58 sizeof(struct pad_conf_entry));
61 static void set_mux_conf_regs(void)
63 switch (omap4_hw_init_context()) {
64 case OMAP_INIT_CONTEXT_SPL:
65 set_muxconf_regs_essential();
67 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
68 set_muxconf_regs_non_essential();
70 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
71 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
72 set_muxconf_regs_essential();
73 set_muxconf_regs_non_essential();
78 static u32 cortex_a9_rev(void)
83 /* Read Main ID Register (MIDR) */
84 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
89 static void init_omap4_revision(void)
92 * For some of the ES2/ES1 boards ID_CODE is not reliable:
93 * Also, ES1 and ES2 have different ARM revisions
94 * So use ARM revision for identification
96 unsigned int arm_rev = cortex_a9_rev();
99 case MIDR_CORTEX_A9_R0P1:
100 *omap4_revision = OMAP4430_ES1_0;
102 case MIDR_CORTEX_A9_R1P2:
103 switch (readl(CONTROL_ID_CODE)) {
104 case OMAP4_CONTROL_ID_CODE_ES2_0:
105 *omap4_revision = OMAP4430_ES2_0;
107 case OMAP4_CONTROL_ID_CODE_ES2_1:
108 *omap4_revision = OMAP4430_ES2_1;
110 case OMAP4_CONTROL_ID_CODE_ES2_2:
111 *omap4_revision = OMAP4430_ES2_2;
114 *omap4_revision = OMAP4430_ES2_0;
118 case MIDR_CORTEX_A9_R1P3:
119 *omap4_revision = OMAP4430_ES2_3;
122 *omap4_revision = OMAP4430_SILICON_ID_INVALID;
127 void omap_rev_string(char *omap4_rev_string)
129 u32 omap4_rev = omap_revision();
130 u32 omap4_variant = (omap4_rev & 0xFFFF0000) >> 16;
131 u32 major_rev = (omap4_rev & 0x00000F00) >> 8;
132 u32 minor_rev = (omap4_rev & 0x000000F0) >> 4;
134 sprintf(omap4_rev_string, "OMAP%x ES%x.%x", omap4_variant, major_rev,
140 * Description: Does early system init of watchdog, muxing, andclocks
141 * Watchdog disable is done always. For the rest what gets done
142 * depends on the boot mode in which this function is executed
143 * 1. s_init of SPL running from SRAM
144 * 2. s_init of U-Boot running from FLASH
145 * 3. s_init of U-Boot loaded to SDRAM by SPL
146 * 4. s_init of U-Boot loaded to SDRAM by ROM code using the
147 * Configuration Header feature
148 * Please have a look at the respective functions to see what gets
149 * done in each of these cases
150 * This function is called with SRAM stack.
154 init_omap4_revision();
161 * Routine: wait_for_command_complete
162 * Description: Wait for posting to finish on watchdog
164 void wait_for_command_complete(struct watchdog *wd_base)
168 pending = readl(&wd_base->wwps);
173 * Routine: watchdog_init
174 * Description: Shut down watch dogs
176 void watchdog_init(void)
178 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
180 writel(WD_UNLOCK1, &wd2_base->wspr);
181 wait_for_command_complete(wd2_base);
182 writel(WD_UNLOCK2, &wd2_base->wspr);
187 * This function finds the SDRAM size available in the system
188 * based on DMM section configurations
189 * This is needed because the size of memory installed may be
190 * different on different versions of the board
194 u32 section, i, total_size = 0, size, addr;
195 for (i = 0; i < 4; i++) {
196 section = __raw_readl(DMM_LISA_MAP_BASE + i*4);
197 addr = section & DMM_LISA_MAP_SYS_ADDR_MASK;
198 /* See if the address is valid */
199 if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
200 (addr < OMAP44XX_DRAM_ADDR_SPACE_END)) {
201 size = ((section & DMM_LISA_MAP_SYS_SIZE_MASK) >>
202 DMM_LISA_MAP_SYS_SIZE_SHIFT);
214 * Description: sets uboots idea of sdram size
219 gd->ram_size = sdram_size();
225 * Print board information
229 puts(sysinfo.board_string);
234 * This function is called by start_armboot. You can reliably use static
235 * data. Any boot-time function that require static data should be
238 int arch_cpu_init(void)
243 #ifndef CONFIG_SYS_L2CACHE_OFF
244 void v7_outer_cache_enable(void)
246 set_pl310_ctrl_reg(1);
249 void v7_outer_cache_disable(void)
251 set_pl310_ctrl_reg(0);