diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/hwinit-common.c')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/hwinit-common.c | 384 |
1 files changed, 384 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c new file mode 100644 index 000000000..8e765cfe7 --- /dev/null +++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c @@ -0,0 +1,384 @@ +/* + * + * Common functions for OMAP4 based boards + * + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * + * Author : + * Aneesh V <aneesh@ti.com> + * Steve Sakoman <steve@sakoman.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> +#include <asm/armv7.h> +#include <asm/arch/cpu.h> +#include <asm/arch/sys_proto.h> +#include <asm/sizes.h> +#include <asm/arch/emif.h> +#include <asm/arch/gpio.h> +#include "../omap4/omap4_mux_data.h" + +DECLARE_GLOBAL_DATA_PTR; + +u32 *const omap4_revision = (u32 *)OMAP4_SRAM_SCRATCH_OMAP4_REV; + +static const struct gpio_bank gpio_bank_44xx[6] = { + { (void *)OMAP44XX_GPIO1_BASE, METHOD_GPIO_24XX }, + { (void *)OMAP44XX_GPIO2_BASE, METHOD_GPIO_24XX }, + { (void *)OMAP44XX_GPIO3_BASE, METHOD_GPIO_24XX }, + { (void *)OMAP44XX_GPIO4_BASE, METHOD_GPIO_24XX }, + { (void *)OMAP44XX_GPIO5_BASE, METHOD_GPIO_24XX }, + { (void *)OMAP44XX_GPIO6_BASE, METHOD_GPIO_24XX }, +}; + +const struct gpio_bank *const omap_gpio_bank = gpio_bank_44xx; + +#ifdef CONFIG_SPL_BUILD +/* + * We use static variables because global data is not ready yet. + * Initialized data is available in SPL right from the beginning. + * We would not typically need to save these parameters in regular + * U-Boot. This is needed only in SPL at the moment. + */ +u32 omap4_boot_device = BOOT_DEVICE_MMC1; +u32 omap4_boot_mode = MMCSD_MODE_FAT; + +u32 omap_boot_device(void) +{ + return omap4_boot_device; +} + +u32 omap_boot_mode(void) +{ + return omap4_boot_mode; +} + +/* + * Some tuning of IOs for optimal power and performance + */ +static void do_io_settings(void) +{ + u32 lpddr2io; + struct control_lpddr2io_regs *lpddr2io_regs = + (struct control_lpddr2io_regs *)LPDDR2_IO_REGS_BASE; + struct omap4_sys_ctrl_regs *const ctrl = + (struct omap4_sys_ctrl_regs *)SYSCTRL_GENERAL_CORE_BASE; + + u32 omap4_rev = omap_revision(); + + if (omap4_rev == OMAP4430_ES1_0) + lpddr2io = CONTROL_LPDDR2IO_SLEW_125PS_DRV8_PULL_DOWN; + else if (omap4_rev == OMAP4430_ES2_0) + lpddr2io = CONTROL_LPDDR2IO_SLEW_325PS_DRV8_GATE_KEEPER; + else + lpddr2io = CONTROL_LPDDR2IO_SLEW_315PS_DRV12_PULL_DOWN; + + /* EMIF1 */ + writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_0); + writel(lpddr2io, &lpddr2io_regs->control_lpddr2io1_1); + /* No pull for GR10 as per hw team's recommendation */ + writel(lpddr2io & ~LPDDR2IO_GR10_WD_MASK, + &lpddr2io_regs->control_lpddr2io1_2); + writel(CONTROL_LPDDR2IO_3_VAL, &lpddr2io_regs->control_lpddr2io1_3); + + /* EMIF2 */ + writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_0); + writel(lpddr2io, &lpddr2io_regs->control_lpddr2io2_1); + /* No pull for GR10 as per hw team's recommendation */ + writel(lpddr2io & ~LPDDR2IO_GR10_WD_MASK, + &lpddr2io_regs->control_lpddr2io2_2); + writel(CONTROL_LPDDR2IO_3_VAL, &lpddr2io_regs->control_lpddr2io2_3); + + /* + * Some of these settings (TRIM values) come from eFuse and are + * in turn programmed in the eFuse at manufacturing time after + * calibration of the device. Do the software over-ride only if + * the device is not correctly trimmed + */ + if (!(readl(&ctrl->control_std_fuse_opp_bgap) & 0xFFFF)) { + + writel(LDOSRAM_VOLT_CTRL_OVERRIDE, + &ctrl->control_ldosram_iva_voltage_ctrl); + + writel(LDOSRAM_VOLT_CTRL_OVERRIDE, + &ctrl->control_ldosram_mpu_voltage_ctrl); + + writel(LDOSRAM_VOLT_CTRL_OVERRIDE, + &ctrl->control_ldosram_core_voltage_ctrl); + } + + if (!readl(&ctrl->control_efuse_1)) + writel(CONTROL_EFUSE_1_OVERRIDE, &ctrl->control_efuse_1); + + if (!readl(&ctrl->control_efuse_2)) + writel(CONTROL_EFUSE_2_OVERRIDE, &ctrl->control_efuse_2); +} +#endif + +void do_set_mux(u32 base, struct pad_conf_entry const *array, int size) +{ + int i; + struct pad_conf_entry *pad = (struct pad_conf_entry *) array; + + for (i = 0; i < size; i++, pad++) + writew(pad->val, base + pad->offset); +} + +static void set_muxconf_regs_essential(void) +{ + do_set_mux(CONTROL_PADCONF_CORE, core_padconf_array_essential, + sizeof(core_padconf_array_essential) / + sizeof(struct pad_conf_entry)); + + do_set_mux(CONTROL_PADCONF_WKUP, wkup_padconf_array_essential, + sizeof(wkup_padconf_array_essential) / + sizeof(struct pad_conf_entry)); + + if (omap_revision() >= OMAP4460_ES1_0) + do_set_mux(CONTROL_PADCONF_WKUP, + wkup_padconf_array_essential_4460, + sizeof(wkup_padconf_array_essential_4460) / + sizeof(struct pad_conf_entry)); +} + +static void set_mux_conf_regs(void) +{ + switch (omap4_hw_init_context()) { + case OMAP_INIT_CONTEXT_SPL: + set_muxconf_regs_essential(); + break; + case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL: + set_muxconf_regs_non_essential(); + break; + case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR: + case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH: + set_muxconf_regs_essential(); + set_muxconf_regs_non_essential(); + break; + } +} + +static u32 cortex_a9_rev(void) +{ + + unsigned int rev; + + /* Read Main ID Register (MIDR) */ + asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev)); + + return rev; +} + +static void init_omap4_revision(void) +{ + /* + * For some of the ES2/ES1 boards ID_CODE is not reliable: + * Also, ES1 and ES2 have different ARM revisions + * So use ARM revision for identification + */ + unsigned int arm_rev = cortex_a9_rev(); + + switch (arm_rev) { + case MIDR_CORTEX_A9_R0P1: + *omap4_revision = OMAP4430_ES1_0; + break; + case MIDR_CORTEX_A9_R1P2: + switch (readl(CONTROL_ID_CODE)) { + case OMAP4430_CONTROL_ID_CODE_ES2_0: + *omap4_revision = OMAP4430_ES2_0; + break; + case OMAP4430_CONTROL_ID_CODE_ES2_1: + *omap4_revision = OMAP4430_ES2_1; + break; + case OMAP4430_CONTROL_ID_CODE_ES2_2: + *omap4_revision = OMAP4430_ES2_2; + break; + default: + *omap4_revision = OMAP4430_ES2_0; + break; + } + break; + case MIDR_CORTEX_A9_R1P3: + *omap4_revision = OMAP4430_ES2_3; + break; + case MIDR_CORTEX_A9_R2P10: + switch (readl(CONTROL_ID_CODE)) { + case OMAP4460_CONTROL_ID_CODE_ES1_0: + *omap4_revision = OMAP4460_ES1_0; + break; + case OMAP4460_CONTROL_ID_CODE_ES1_1: + *omap4_revision = OMAP4460_ES1_1; + break; + default: + *omap4_revision = OMAP4460_ES1_0; + break; + } + break; + default: + *omap4_revision = OMAP4430_SILICON_ID_INVALID; + break; + } +} + +void omap_rev_string(char *omap4_rev_string) +{ + u32 omap4_rev = omap_revision(); + u32 omap4_variant = (omap4_rev & 0xFFFF0000) >> 16; + u32 major_rev = (omap4_rev & 0x00000F00) >> 8; + u32 minor_rev = (omap4_rev & 0x000000F0) >> 4; + + sprintf(omap4_rev_string, "OMAP%x ES%x.%x", omap4_variant, major_rev, + minor_rev); +} + +/* + * Routine: s_init + * Description: Does early system init of watchdog, muxing, andclocks + * Watchdog disable is done always. For the rest what gets done + * depends on the boot mode in which this function is executed + * 1. s_init of SPL running from SRAM + * 2. s_init of U-Boot running from FLASH + * 3. s_init of U-Boot loaded to SDRAM by SPL + * 4. s_init of U-Boot loaded to SDRAM by ROM code using the + * Configuration Header feature + * Please have a look at the respective functions to see what gets + * done in each of these cases + * This function is called with SRAM stack. + */ +void s_init(void) +{ + init_omap4_revision(); + watchdog_init(); + set_mux_conf_regs(); +#ifdef CONFIG_SPL_BUILD + setup_clocks_for_console(); + preloader_console_init(); + do_io_settings(); +#endif + prcm_init(); +#ifdef CONFIG_SPL_BUILD + /* For regular u-boot sdram_init() is called from dram_init() */ + sdram_init(); +#endif +} + +/* + * Routine: wait_for_command_complete + * Description: Wait for posting to finish on watchdog + */ +void wait_for_command_complete(struct watchdog *wd_base) +{ + int pending = 1; + do { + pending = readl(&wd_base->wwps); + } while (pending); +} + +/* + * Routine: watchdog_init + * Description: Shut down watch dogs + */ +void watchdog_init(void) +{ + struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE; + + writel(WD_UNLOCK1, &wd2_base->wspr); + wait_for_command_complete(wd2_base); + writel(WD_UNLOCK2, &wd2_base->wspr); +} + + +/* + * This function finds the SDRAM size available in the system + * based on DMM section configurations + * This is needed because the size of memory installed may be + * different on different versions of the board + */ +u32 omap4_sdram_size(void) +{ + u32 section, i, total_size = 0, size, addr; + for (i = 0; i < 4; i++) { + section = __raw_readl(OMAP44XX_DMM_LISA_MAP_BASE + i*4); + addr = section & OMAP44XX_SYS_ADDR_MASK; + /* See if the address is valid */ + if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) && + (addr < OMAP44XX_DRAM_ADDR_SPACE_END)) { + size = ((section & OMAP44XX_SYS_SIZE_MASK) >> + OMAP44XX_SYS_SIZE_SHIFT); + size = 1 << size; + size *= SZ_16M; + total_size += size; + } + } + return total_size; +} + + +/* + * Routine: dram_init + * Description: sets uboots idea of sdram size + */ +int dram_init(void) +{ + sdram_init(); + gd->ram_size = omap4_sdram_size(); + + return 0; +} + +/* + * Print board information + */ +int checkboard(void) +{ + puts(sysinfo.board_string); + return 0; +} + +/* +* This function is called by start_armboot. You can reliably use static +* data. Any boot-time function that require static data should be +* called from here +*/ +int arch_cpu_init(void) +{ + return 0; +} + +#ifndef CONFIG_SYS_L2CACHE_OFF +void v7_outer_cache_enable(void) +{ + set_pl310_ctrl_reg(1); +} + +void v7_outer_cache_disable(void) +{ + set_pl310_ctrl_reg(0); +} +#endif + +#ifndef CONFIG_SYS_DCACHE_OFF +void enable_caches(void) +{ + /* Enable D-cache. I-cache is already enabled in start.S */ + dcache_enable(); +} +#endif |