diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c | 428 |
1 files changed, 0 insertions, 428 deletions
diff --git a/arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c b/arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c deleted file mode 100644 index 1ea4a9ffc..000000000 --- a/arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c +++ /dev/null @@ -1,428 +0,0 @@ -/* - * SoC-specific lowlevel code for AM1808 and similar chips - * - * Copyright (C) 2011 - * Heiko Schocher, DENX Software Engineering, hs@denx.de. - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <common.h> -#include <nand.h> -#include <ns16550.h> -#include <post.h> -#include <asm/arch/am1808_lowlevel.h> -#include <asm/arch/hardware.h> -#include <asm/arch/ddr2_defs.h> -#include <asm/arch/emif_defs.h> - -void am1808_waitloop(unsigned long loopcnt) -{ - unsigned long i; - - for (i = 0; i < loopcnt; i++) - asm(" NOP"); -} - -int am1808_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult) -{ - if (reg == davinci_pllc0_regs) - /* Unlock PLL registers. */ - clrbits_le32(&davinci_syscfg_regs->cfgchip0, 0x00000010); - - /* - * Set PLLENSRC '0',bit 5, PLL Enable(PLLEN) selection is controlled - * through MMR - */ - clrbits_le32(®->pllctl, 0x00000020); - /* PLLCTL.EXTCLKSRC bit 9 should be left at 0 for Freon */ - clrbits_le32(®->pllctl, 0x00000200); - - /* Set PLLEN=0 => PLL BYPASS MODE */ - clrbits_le32(®->pllctl, 0x00000001); - - am1808_waitloop(150); - - if (reg == davinci_pllc0_regs) { - /* - * Select the Clock Mode bit 8 as External Clock or On Chip - * Oscilator - */ - dv_maskbits(®->pllctl, 0xFFFFFEFF); - setbits_le32(®->pllctl, (CONFIG_SYS_DV_CLKMODE << 8)); - } - - /* Clear PLLRST bit to reset the PLL */ - clrbits_le32(®->pllctl, 0x00000008); - - /* Disable the PLL output */ - setbits_le32(®->pllctl, 0x00000010); - - /* PLL initialization sequence */ - /* - * Power up the PLL- PWRDN bit set to 0 to bring the PLL out of - * power down bit - */ - clrbits_le32(®->pllctl, 0x00000002); - - /* Enable the PLL from Disable Mode PLLDIS bit to 0 */ - clrbits_le32(®->pllctl, 0x00000010); - - /* Program the required multiplier value in PLLM */ - writel(pllmult, ®->pllm); - - /* program the postdiv */ - if (reg == davinci_pllc0_regs) - writel((0x8000 | CONFIG_SYS_AM1808_PLL0_POSTDIV), - ®->postdiv); - else - writel((0x8000 | CONFIG_SYS_AM1808_PLL1_POSTDIV), - ®->postdiv); - - /* - * Check for the GOSTAT bit in PLLSTAT to clear to 0 to indicate that - * no GO operation is currently in progress - */ - while ((readl(®->pllstat) & 0x1) == 1) - ; - - if (reg == davinci_pllc0_regs) { - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV1, ®->plldiv1); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV2, ®->plldiv2); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV3, ®->plldiv3); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV4, ®->plldiv4); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV5, ®->plldiv5); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV6, ®->plldiv6); - writel(CONFIG_SYS_AM1808_PLL0_PLLDIV7, ®->plldiv7); - } else { - writel(CONFIG_SYS_AM1808_PLL1_PLLDIV1, ®->plldiv1); - writel(CONFIG_SYS_AM1808_PLL1_PLLDIV2, ®->plldiv2); - writel(CONFIG_SYS_AM1808_PLL1_PLLDIV3, ®->plldiv3); - } - - /* - * Set the GOSET bit in PLLCMD to 1 to initiate a new divider - * transition. - */ - setbits_le32(®->pllcmd, 0x01); - - /* - * Wait for the GOSTAT bit in PLLSTAT to clear to 0 - * (completion of phase alignment). - */ - while ((readl(®->pllstat) & 0x1) == 1) - ; - - /* Wait for PLL to reset properly. See PLL spec for PLL reset time */ - am1808_waitloop(200); - - /* Set the PLLRST bit in PLLCTL to 1 to bring the PLL out of reset */ - setbits_le32(®->pllctl, 0x00000008); - - /* Wait for PLL to lock. See PLL spec for PLL lock time */ - am1808_waitloop(2400); - - /* - * Set the PLLEN bit in PLLCTL to 1 to remove the PLL from bypass - * mode - */ - setbits_le32(®->pllctl, 0x00000001); - - - /* - * clear EMIFA and EMIFB clock source settings, let them - * run off SYSCLK - */ - if (reg == davinci_pllc0_regs) - dv_maskbits(&davinci_syscfg_regs->cfgchip3, 0xFFFFFFF8); - - return 0; -} - -void am1808_lpc_transition(unsigned char pscnum, unsigned char module, - unsigned char domain, unsigned char state) -{ - struct davinci_psc_regs *reg; - dv_reg_p mdstat, mdctl; - - if (pscnum == 0) { - reg = davinci_psc0_regs; - mdstat = ®->psc0.mdstat[module]; - mdctl = ®->psc0.mdctl[module]; - } else { - reg = davinci_psc1_regs; - mdstat = ®->psc1.mdstat[module]; - mdctl = ®->psc1.mdctl[module]; - } - - /* Wait for any outstanding transition to complete */ - while ((readl(®->ptstat) & (0x00000001 << domain))) - ; - - /* If we are already in that state, just return */ - if ((readl(mdstat) & 0x1F) == state) - return; - - /* Perform transition */ - writel((readl(mdctl) & 0xFFFFFFE0) | state, mdctl); - setbits_le32(®->ptcmd, (0x00000001 << domain)); - - /* Wait for transition to complete */ - while (readl(®->ptstat) & (0x00000001 << domain)) - ; - - /* Wait and verify the state */ - while ((readl(mdstat) & 0x1F) != state) - ; -} - -int am1808_ddr_setup(unsigned int freq) -{ - unsigned long tmp; - - /* Enable the Clock to DDR2/mDDR */ - am1808_lpc_transition(1, 6, 0, PSC_ENABLE); - - tmp = readl(&davinci_syscfg1_regs->vtpio_ctl); - if ((tmp & VTP_POWERDWN) == VTP_POWERDWN) { - /* Begin VTP Calibration */ - clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN); - clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK); - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ); - clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ); - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ); - - /* Polling READY bit to see when VTP calibration is done */ - tmp = readl(&davinci_syscfg1_regs->vtpio_ctl); - while ((tmp & VTP_READY) != VTP_READY) - tmp = readl(&davinci_syscfg1_regs->vtpio_ctl); - - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK); - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN); - - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN); - } - - writel(CONFIG_SYS_AM1808_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr); - clrbits_le32(&davinci_syscfg1_regs->ddr_slew, - (1 << DDR_SLEW_CMOSEN_BIT)); - - setbits_le32(&dv_ddr2_regs_ctrl->sdbcr, DV_DDR_BOOTUNLOCK); - - writel((CONFIG_SYS_AM1808_DDR2_SDBCR & ~0xf0000000) | - (readl(&dv_ddr2_regs_ctrl->sdbcr) & 0xf0000000), /*rsv Bytes*/ - &dv_ddr2_regs_ctrl->sdbcr); - writel(CONFIG_SYS_AM1808_DDR2_SDBCR2, &dv_ddr2_regs_ctrl->sdbcr2); - - writel(CONFIG_SYS_AM1808_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr); - writel(CONFIG_SYS_AM1808_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2); - - clrbits_le32(&dv_ddr2_regs_ctrl->sdbcr, - (1 << DV_DDR_SDCR_TIMUNLOCK_SHIFT)); - - /* - * LPMODEN and MCLKSTOPEN must be set! - * Without this bits set, PSC don;t switch states !! - */ - writel(CONFIG_SYS_AM1808_DDR2_SDRCR | - (1 << DV_DDR_SRCR_LPMODEN_SHIFT) | - (1 << DV_DDR_SRCR_MCLKSTOPEN_SHIFT), - &dv_ddr2_regs_ctrl->sdrcr); - - /* SyncReset the Clock to EMIF3A SDRAM */ - am1808_lpc_transition(1, 6, 0, PSC_SYNCRESET); - /* Enable the Clock to EMIF3A SDRAM */ - am1808_lpc_transition(1, 6, 0, PSC_ENABLE); - - /* disable self refresh */ - clrbits_le32(&dv_ddr2_regs_ctrl->sdrcr, 0xc0000000); - writel(0x30, &dv_ddr2_regs_ctrl->pbbpr); - - return 0; -} - -static void am1808_set_mdctl(dv_reg_p mdctl) -{ - if ((readl(mdctl) & 0x1F) != PSC_ENABLE) - writel(((readl(mdctl) & 0xFFFFFFE0) | PSC_ENABLE), mdctl); -} - -void am1808_psc_init(void) -{ - struct davinci_psc_regs *reg; - int i; - - /* PSC 0 domain 0 init */ - reg = davinci_psc0_regs; - while ((readl(®->ptstat) & 0x00000001)) - ; - - for (i = 3; i <= 4 ; i++) - am1808_set_mdctl(®->psc0.mdctl[i]); - - for (i = 7; i <= 12 ; i++) - am1808_set_mdctl(®->psc0.mdctl[i]); - - /* Do Always-On Power Domain Transitions */ - setbits_le32(®->ptcmd, 0x00000001); - while (readl(®->ptstat) & 0x00000001) - ; - - /* PSC1, domain 1 init */ - reg = davinci_psc1_regs; - while ((readl(®->ptstat) & 0x00000001)) - ; - - am1808_set_mdctl(®->psc1.mdctl[3]); - am1808_set_mdctl(®->psc1.mdctl[6]); - - /* UART1 + UART2 */ - for (i = 12 ; i <= 13 ; i++) - am1808_set_mdctl(®->psc1.mdctl[i]); - - am1808_set_mdctl(®->psc1.mdctl[26]); - am1808_set_mdctl(®->psc1.mdctl[31]); - - /* Do Always-On Power Domain Transitions */ - setbits_le32(®->ptcmd, 0x00000001); - while (readl(®->ptstat) & 0x00000001) - ; -} - -void am1808_pinmux_ctl(unsigned long offset, unsigned long mask, - unsigned long value) -{ - clrbits_le32(&davinci_syscfg_regs->pinmux[offset], mask); - setbits_le32(&davinci_syscfg_regs->pinmux[offset], (mask & value)); -} - -__attribute__((weak)) -void board_gpio_init(void) -{ - return; -} - -#if defined(CONFIG_NAND_SPL) -void nand_boot(void) -{ - __attribute__((noreturn)) void (*uboot)(void); - - /* copy image from NOR to RAM */ - memcpy((void *)CONFIG_SYS_NAND_U_BOOT_DST, - (void *)CONFIG_SYS_NAND_U_BOOT_OFFS, - CONFIG_SYS_NAND_U_BOOT_SIZE); - - /* and jump to it ... */ - uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START; - (*uboot)(); -} -#endif - -#if defined(CONFIG_NAND_SPL) -void board_init_f(ulong bootflag) -#else -int arch_cpu_init(void) -#endif -{ - /* - * copied from arch/arm/cpu/arm926ejs/start.S - * - * flush v4 I/D caches - */ - asm("mov r0, #0"); - asm("mcr p15, 0, r0, c7, c7, 0"); /* flush v3/v4 cache */ - asm("mcr p15, 0, r0, c8, c7, 0"); /* flush v4 TLB */ - - /* - * disable MMU stuff and caches - */ - asm("mrc p15, 0, r0, c1, c0, 0"); - /* clear bits 13, 9:8 (--V- --RS) */ - asm("bic r0, r0, #0x00002300"); - /* clear bits 7, 2:0 (B--- -CAM) */ - asm("bic r0, r0, #0x00000087"); - /* set bit 2 (A) Align */ - asm("orr r0, r0, #0x00000002"); - /* set bit 12 (I) I-Cache */ - asm("orr r0, r0, #0x00001000"); - asm("mcr p15, 0, r0, c1, c0, 0"); - - /* Unlock kick registers */ - writel(0x83e70b13, &davinci_syscfg_regs->kick0); - writel(0x95a4f1e0, &davinci_syscfg_regs->kick1); - - dv_maskbits(&davinci_syscfg_regs->suspsrc, - ((1 << 27) | (1 << 22) | (1 << 20) | (1 << 5) | (1 << 16))); - - /* System PSC setup - enable all */ - am1808_psc_init(); - - /* Setup Pinmux */ - am1808_pinmux_ctl(0, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX0); - am1808_pinmux_ctl(1, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX1); - am1808_pinmux_ctl(2, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX2); - am1808_pinmux_ctl(3, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX3); - am1808_pinmux_ctl(4, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX4); - am1808_pinmux_ctl(5, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX5); - am1808_pinmux_ctl(6, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX6); - am1808_pinmux_ctl(7, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX7); - am1808_pinmux_ctl(8, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX8); - am1808_pinmux_ctl(9, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX9); - am1808_pinmux_ctl(10, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX10); - am1808_pinmux_ctl(11, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX11); - am1808_pinmux_ctl(12, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX12); - am1808_pinmux_ctl(13, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX13); - am1808_pinmux_ctl(14, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX14); - am1808_pinmux_ctl(15, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX15); - am1808_pinmux_ctl(16, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX16); - am1808_pinmux_ctl(17, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX17); - am1808_pinmux_ctl(18, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX18); - am1808_pinmux_ctl(19, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX19); - - /* PLL setup */ - am1808_pll_init(davinci_pllc0_regs, CONFIG_SYS_AM1808_PLL0_PLLM); - am1808_pll_init(davinci_pllc1_regs, CONFIG_SYS_AM1808_PLL1_PLLM); - - /* GPIO setup */ - board_gpio_init(); - - /* setup CSn config */ - writel(CONFIG_SYS_AM1808_CS2CFG, &davinci_emif_regs->ab1cr); - writel(CONFIG_SYS_AM1808_CS3CFG, &davinci_emif_regs->ab2cr); - - am1808_lpc_transition(1, 13, 0, PSC_ENABLE); - NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1), - CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE); - - /* - * Fix Power and Emulation Management Register - * see sprufw3a.pdf page 37 Table 24 - */ - writel(readl((CONFIG_SYS_NS16550_COM1 + 0x30)) | 0x00006001, - (CONFIG_SYS_NS16550_COM1 + 0x30)); -#if defined(CONFIG_NAND_SPL) - puts("ddr init\n"); - am1808_ddr_setup(132); - - puts("boot u-boot ...\n"); - - nand_boot(); -#else - am1808_ddr_setup(132); - return 0; -#endif -} |