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,
32 #include <asm/arch/sys_proto.h>
33 #include <asm/sizes.h>
35 #include <asm/omap_common.h>
36 #include <linux/compiler.h>
37 #include <asm/cache.h>
38 #include <asm/system.h>
40 #define ARMV7_DCACHE_WRITEBACK 0xe
41 #define ARMV7_DOMAIN_CLIENT 1
42 #define ARMV7_DOMAIN_MASK (0x3 << 0)
44 DECLARE_GLOBAL_DATA_PTR;
46 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
49 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
51 for (i = 0; i < size; i++, pad++)
52 writew(pad->val, base + pad->offset);
55 static void set_mux_conf_regs(void)
57 switch (omap_hw_init_context()) {
58 case OMAP_INIT_CONTEXT_SPL:
59 set_muxconf_regs_essential();
61 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
62 #ifdef CONFIG_SYS_ENABLE_PADS_ALL
63 set_muxconf_regs_non_essential();
66 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
67 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
68 set_muxconf_regs_essential();
69 #ifdef CONFIG_SYS_ENABLE_PADS_ALL
70 set_muxconf_regs_non_essential();
81 /* Read Main ID Register (MIDR) */
82 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
87 static void omap_rev_string(void)
89 u32 omap_rev = omap_revision();
90 u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
91 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
92 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
93 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
99 printf("%x ES%x.%x\n", omap_variant, major_rev,
103 #ifdef CONFIG_SPL_BUILD
104 void spl_display_print(void)
110 void __weak srcomp_enable(void)
114 static void save_omap_boot_params(void)
116 u32 rom_params = *((u32 *)OMAP_SRAM_SCRATCH_BOOT_PARAMS);
118 u32 dev_desc, dev_data;
120 if ((rom_params < NON_SECURE_SRAM_START) ||
121 (rom_params > NON_SECURE_SRAM_END))
125 * rom_params can be type casted to omap_boot_parameters and
126 * used. But it not correct to assume that romcode structure
127 * encoding would be same as u-boot. So use the defined offsets.
129 gd->arch.omap_boot_params.omap_bootdevice = boot_device =
130 *((u8 *)(rom_params + BOOT_DEVICE_OFFSET));
132 gd->arch.omap_boot_params.ch_flags =
133 *((u8 *)(rom_params + CH_FLAGS_OFFSET));
135 if ((boot_device >= MMC_BOOT_DEVICES_START) &&
136 (boot_device <= MMC_BOOT_DEVICES_END)) {
137 if ((omap_hw_init_context() ==
138 OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL)) {
139 gd->arch.omap_boot_params.omap_bootmode =
140 *((u8 *)(rom_params + BOOT_MODE_OFFSET));
142 dev_desc = *((u32 *)(rom_params + DEV_DESC_PTR_OFFSET));
143 dev_data = *((u32 *)(dev_desc + DEV_DATA_PTR_OFFSET));
144 gd->arch.omap_boot_params.omap_bootmode =
145 *((u32 *)(dev_data + BOOT_MODE_OFFSET));
150 #ifdef CONFIG_ARCH_CPU_INIT
152 * SOC specific cpu init
154 int arch_cpu_init(void)
156 save_omap_boot_params();
159 #endif /* CONFIG_ARCH_CPU_INIT */
163 * Description: Does early system init of watchdog, muxing, andclocks
164 * Watchdog disable is done always. For the rest what gets done
165 * depends on the boot mode in which this function is executed
166 * 1. s_init of SPL running from SRAM
167 * 2. s_init of U-Boot running from FLASH
168 * 3. s_init of U-Boot loaded to SDRAM by SPL
169 * 4. s_init of U-Boot loaded to SDRAM by ROM code using the
170 * Configuration Header feature
171 * Please have a look at the respective functions to see what gets
172 * done in each of these cases
173 * This function is called with SRAM stack.
178 * Save the boot parameters passed from romcode.
179 * We cannot delay the saving further than this,
180 * to prevent overwrites.
182 #ifdef CONFIG_SPL_BUILD
183 save_omap_boot_params();
185 init_omap_revision();
188 #ifdef CONFIG_SPL_BUILD
189 if (warm_reset() && (omap_revision() <= OMAP5430_ES1_0))
190 force_emif_self_refresh();
194 #ifdef CONFIG_SPL_BUILD
196 setup_clocks_for_console();
200 preloader_console_init();
204 #ifdef CONFIG_SPL_BUILD
207 /* For regular u-boot sdram_init() is called from dram_init() */
213 * Routine: wait_for_command_complete
214 * Description: Wait for posting to finish on watchdog
216 void wait_for_command_complete(struct watchdog *wd_base)
220 pending = readl(&wd_base->wwps);
225 * Routine: watchdog_init
226 * Description: Shut down watch dogs
228 void watchdog_init(void)
230 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
232 writel(WD_UNLOCK1, &wd2_base->wspr);
233 wait_for_command_complete(wd2_base);
234 writel(WD_UNLOCK2, &wd2_base->wspr);
239 * This function finds the SDRAM size available in the system
240 * based on DMM section configurations
241 * This is needed because the size of memory installed may be
242 * different on different versions of the board
244 u32 omap_sdram_size(void)
246 u32 section, i, valid;
247 u64 sdram_start = 0, sdram_end = 0, addr,
248 size, total_size = 0, trap_size = 0;
250 for (i = 0; i < 4; i++) {
251 section = __raw_readl(DMM_BASE + i*4);
252 valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
253 (EMIF_SDRC_ADDRSPC_SHIFT);
254 addr = section & EMIF_SYS_ADDR_MASK;
256 /* See if the address is valid */
257 if ((addr >= DRAM_ADDR_SPACE_START) &&
258 (addr < DRAM_ADDR_SPACE_END)) {
259 size = ((section & EMIF_SYS_SIZE_MASK) >>
260 EMIF_SYS_SIZE_SHIFT);
264 if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
265 if (!sdram_start || (addr < sdram_start))
267 if (!sdram_end || ((addr + size) > sdram_end))
268 sdram_end = addr + size;
276 total_size = (sdram_end - sdram_start) - (trap_size);
284 * Description: sets uboots idea of sdram size
289 gd->ram_size = omap_sdram_size();
294 * Print board information
298 puts(sysinfo.board_string);
303 * get_device_type(): tell if GP/HS/EMU/TST
305 u32 get_device_type(void)
307 return (readl((*ctrl)->control_status) &
308 (DEVICE_TYPE_MASK)) >> DEVICE_TYPE_SHIFT;
312 * Print CPU information
314 int print_cpuinfo(void)
321 #ifndef CONFIG_SYS_DCACHE_OFF
322 void enable_caches(void)
324 /* Enable D-cache. I-cache is already enabled in start.S */
328 void dram_bank_mmu_setup(int bank)
333 u32 start = bd->bi_dram[bank].start >> 20;
334 u32 size = bd->bi_dram[bank].size >> 20;
335 u32 end = start + size;
337 debug("%s: bank: %d\n", __func__, bank);
338 for (i = start; i < end; i++)
339 set_section_dcache(i, ARMV7_DCACHE_WRITEBACK);
343 void arm_init_domains(void)
349 * Set DOMAIN to client access so that all permissions
350 * set in pagetables are validated by the mmu.
352 reg &= ~ARMV7_DOMAIN_MASK;
353 reg |= ARMV7_DOMAIN_CLIENT;