diff options
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/at91/sama5d3_devices.c | 6 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/at91/timer.c | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/at91-common/Makefile | 12 | ||||
| -rw-r--r-- | arch/arm/cpu/at91-common/mpddrc.c | 124 | ||||
| -rw-r--r-- | arch/arm/cpu/at91-common/phy.c | 57 | ||||
| -rw-r--r-- | arch/arm/cpu/at91-common/spl.c | 90 | ||||
| -rw-r--r-- | arch/arm/cpu/at91-common/u-boot-spl.lds | 50 |
9 files changed, 340 insertions, 4 deletions
diff --git a/arch/arm/cpu/Makefile b/arch/arm/cpu/Makefile index fd0da53..b2d30b1 100644 --- a/arch/arm/cpu/Makefile +++ b/arch/arm/cpu/Makefile @@ -1,2 +1,3 @@ +obj-$(CONFIG_AT91FAMILY) += at91-common/ obj-$(CONFIG_TEGRA) += $(SOC)-common/ obj-$(CONFIG_TEGRA) += tegra-common/ diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile index d3347b3..0467d00 100644 --- a/arch/arm/cpu/armv7/Makefile +++ b/arch/arm/cpu/armv7/Makefile @@ -12,7 +12,7 @@ obj-y += cache_v7.o obj-y += cpu.o obj-y += syslib.o -ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_TI81XX),) +ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_TI81XX)$(CONFIG_AT91FAMILY),) ifneq ($(CONFIG_SKIP_LOWLEVEL_INIT),y) obj-y += lowlevel_init.o endif diff --git a/arch/arm/cpu/armv7/at91/sama5d3_devices.c b/arch/arm/cpu/armv7/at91/sama5d3_devices.c index 51f0a6d..78ecfc8 100644 --- a/arch/arm/cpu/armv7/at91/sama5d3_devices.c +++ b/arch/arm/cpu/armv7/at91/sama5d3_devices.c @@ -15,7 +15,7 @@ unsigned int has_emac() { - return cpu_is_sama5d31() || cpu_is_sama5d35(); + return cpu_is_sama5d31() || cpu_is_sama5d35() || cpu_is_sama5d36(); } unsigned int has_gmac() @@ -42,6 +42,8 @@ char *get_cpu_name() return "SAMA5D34"; case ARCH_EXID_SAMA5D35: return "SAMA5D35"; + case ARCH_EXID_SAMA5D36: + return "SAMA5D36"; default: return "Unknown CPU type"; } @@ -82,7 +84,7 @@ void at91_seriald_hw_init(void) at91_set_a_periph(AT91_PIO_PORTB, 30, 0); /* DRXD */ /* Enable clock */ - at91_periph_clk_enable(ATMEL_ID_SYS); + at91_periph_clk_enable(ATMEL_ID_DBGU); } #if defined(CONFIG_ATMEL_SPI) diff --git a/arch/arm/cpu/armv7/at91/timer.c b/arch/arm/cpu/armv7/at91/timer.c index 3808aed..e3ebfe0 100644 --- a/arch/arm/cpu/armv7/at91/timer.c +++ b/arch/arm/cpu/armv7/at91/timer.c @@ -60,7 +60,7 @@ int timer_init(void) at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT; /* Enable PITC Clock */ - at91_periph_clk_enable(ATMEL_ID_SYS); + at91_periph_clk_enable(ATMEL_ID_PIT); /* Enable PITC */ writel(TIMER_LOAD_VAL | AT91_PIT_MR_EN , &pit->mr); diff --git a/arch/arm/cpu/at91-common/Makefile b/arch/arm/cpu/at91-common/Makefile new file mode 100644 index 0000000..5b97838 --- /dev/null +++ b/arch/arm/cpu/at91-common/Makefile @@ -0,0 +1,12 @@ +# +# (C) Copyright 2000-2008 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2013 Atmel Corporation +# Bo Shen <voice.shen@atmel.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_AT91_WANTS_COMMON_PHY) += phy.o +obj-$(CONFIG_SPL_BUILD) += mpddrc.o spl.o diff --git a/arch/arm/cpu/at91-common/mpddrc.c b/arch/arm/cpu/at91-common/mpddrc.c new file mode 100644 index 0000000..8136396 --- /dev/null +++ b/arch/arm/cpu/at91-common/mpddrc.c @@ -0,0 +1,124 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen <voice.shen@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/atmel_mpddrc.h> + +static inline void atmel_mpddr_op(int mode, u32 ram_address) +{ + struct atmel_mpddr *mpddr = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC; + + writel(mode, &mpddr->mr); + writel(0, ram_address); +} + +int ddr2_init(const unsigned int ram_address, + const struct atmel_mpddr *mpddr_value) +{ + struct atmel_mpddr *mpddr = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC; + u32 ba_off, cr; + + /* Compute bank offset according to NC in configuration register */ + ba_off = (mpddr_value->cr & ATMEL_MPDDRC_CR_NC_MASK) + 9; + if (!(mpddr_value->cr & ATMEL_MPDDRC_CR_DECOD_INTERLEAVED)) + ba_off += ((mpddr->cr & ATMEL_MPDDRC_CR_NR_MASK) >> 2) + 11; + + ba_off += (mpddr_value->md & ATMEL_MPDDRC_MD_DBW_MASK) ? 1 : 2; + + /* Program the memory device type into the memory device register */ + writel(mpddr_value->md, &mpddr->md); + + /* Program the configuration register */ + writel(mpddr_value->cr, &mpddr->cr); + + /* Program the timing register */ + writel(mpddr_value->tpr0, &mpddr->tpr0); + writel(mpddr_value->tpr1, &mpddr->tpr1); + writel(mpddr_value->tpr2, &mpddr->tpr2); + + /* Issue a NOP command */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address); + + /* A 200 us is provided to precede any signal toggle */ + udelay(200); + + /* Issue a NOP command */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NOP_CMD, ram_address); + + /* Issue an all banks precharge command */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address); + + /* Issue an extended mode register set(EMRS2) to choose operation */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD, + ram_address + (0x2 << ba_off)); + + /* Issue an extended mode register set(EMRS3) to set EMSR to 0 */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD, + ram_address + (0x3 << ba_off)); + + /* + * Issue an extended mode register set(EMRS1) to enable DLL and + * program D.I.C (output driver impedance control) + */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD, + ram_address + (0x1 << ba_off)); + + /* Enable DLL reset */ + cr = readl(&mpddr->cr); + writel(cr | ATMEL_MPDDRC_CR_DLL_RESET_ENABLED, &mpddr->cr); + + /* A mode register set(MRS) cycle is issued to reset DLL */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address); + + /* Issue an all banks precharge command */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_PRCGALL_CMD, ram_address); + + /* Two auto-refresh (CBR) cycles are provided */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address); + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_RFSH_CMD, ram_address); + + /* Disable DLL reset */ + cr = readl(&mpddr->cr); + writel(cr & (~ATMEL_MPDDRC_CR_DLL_RESET_ENABLED), &mpddr->cr); + + /* A mode register set (MRS) cycle is issued to disable DLL reset */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_LMR_CMD, ram_address); + + /* Set OCD calibration in default state */ + cr = readl(&mpddr->cr); + writel(cr | ATMEL_MPDDRC_CR_OCD_DEFAULT, &mpddr->cr); + + /* + * An extended mode register set (EMRS1) cycle is issued + * to OCD default value + */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD, + ram_address + (0x1 << ba_off)); + + /* OCD calibration mode exit */ + cr = readl(&mpddr->cr); + writel(cr & (~ATMEL_MPDDRC_CR_OCD_DEFAULT), &mpddr->cr); + + /* + * An extended mode register set (EMRS1) cycle is issued + * to enable OCD exit + */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_EXT_LMR_CMD, + ram_address + (0x1 << ba_off)); + + /* A nornal mode command is provided */ + atmel_mpddr_op(ATMEL_MPDDRC_MR_MODE_NORMAL_CMD, ram_address); + + /* Perform a write access to any DDR2-SDRAM address */ + writel(0, ram_address); + + /* Write the refresh rate */ + writel(mpddr_value->rtr, &mpddr->rtr); + + return 0; +} diff --git a/arch/arm/cpu/at91-common/phy.c b/arch/arm/cpu/at91-common/phy.c new file mode 100644 index 0000000..3b6c60c --- /dev/null +++ b/arch/arm/cpu/at91-common/phy.c @@ -0,0 +1,57 @@ +/* + * (C) Copyright 2007-2008 + * Stelian Pop <stelian@popies.net> + * Lead Tech Design <www.leadtechdesign.com> + * + * (C) Copyright 2012 + * Markus Hubig <mhubig@imko.de> + * IMKO GmbH <www.imko.de> + * + * Copyright (C) 2013 DENX Software Engineering, hs@denx.de + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/sizes.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/at91_rstc.h> +#include <watchdog.h> + +void at91_phy_reset(void) +{ + unsigned long erstl; + unsigned long start = get_timer(0); + unsigned long const timeout = 1000; /* 1000ms */ + at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC; + + erstl = readl(&rstc->mr) & AT91_RSTC_MR_ERSTL_MASK; + + /* + * Need to reset PHY -> 500ms reset + * Reset PHY by pulling the NRST line for 500ms to low. To do so + * disable user reset for low level on NRST pin and poll the NRST + * level in reset status register. + */ + writel(AT91_RSTC_KEY | AT91_RSTC_MR_ERSTL(0x0D) | + AT91_RSTC_MR_URSTEN, &rstc->mr); + + writel(AT91_RSTC_KEY | AT91_RSTC_CR_EXTRST, &rstc->cr); + + /* Wait for end of hardware reset */ + while (!(readl(&rstc->sr) & AT91_RSTC_SR_NRSTL)) { + /* avoid shutdown by watchdog */ + WATCHDOG_RESET(); + mdelay(10); + + /* timeout for not getting stuck in an endless loop */ + if (get_timer(start) >= timeout) { + puts("*** ERROR: Timeout waiting for PHY reset!\n"); + break; + } + }; + + /* Restore NRST value */ + writel(AT91_RSTC_KEY | erstl | AT91_RSTC_MR_URSTEN, &rstc->mr); +} diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c new file mode 100644 index 0000000..37c0cc4 --- /dev/null +++ b/arch/arm/cpu/at91-common/spl.c @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen <voice.shen@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/at91_wdt.h> +#include <asm/arch/clk.h> +#include <spl.h> + +static void at91_disable_wdt(void) +{ + struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT; + + writel(AT91_WDT_MR_WDDIS, &wdt->mr); +} + +void at91_plla_init(u32 pllar) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + + writel(pllar, &pmc->pllar); + while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) + ; +} + +void at91_mck_init(u32 mckr) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = readl(&pmc->mckr); + tmp &= ~(AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + writel(tmp, &pmc->mckr); + + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; +} + + +u32 spl_boot_device(void) +{ +#ifdef CONFIG_SYS_USE_MMC + return BOOT_DEVICE_MMC1; +#endif + return BOOT_DEVICE_NONE; +} + +u32 spl_boot_mode(void) +{ + switch (spl_boot_device()) { +#ifdef CONFIG_SYS_USE_MMC + case BOOT_DEVICE_MMC1: + return MMCSD_MODE_FAT; + break; +#endif + case BOOT_DEVICE_NONE: + default: + hang(); + } +} + +void s_init(void) +{ + /* disable watchdog */ + at91_disable_wdt(); + + /* PMC configuration */ + at91_pmc_init(); + + at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); + + timer_init(); + + board_early_init_f(); + + preloader_console_init(); + + mem_init(); +} diff --git a/arch/arm/cpu/at91-common/u-boot-spl.lds b/arch/arm/cpu/at91-common/u-boot-spl.lds new file mode 100644 index 0000000..038335d --- /dev/null +++ b/arch/arm/cpu/at91-common/u-boot-spl.lds @@ -0,0 +1,50 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> + * + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * Aneesh V <aneesh@ti.com> + * + * (C) 2013 Atmel Corporation + * Bo Shen <voice.shen@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \ + LENGTH = CONFIG_SPL_MAX_SIZE } +MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \ + LENGTH = CONFIG_SPL_BSS_MAX_SIZE } + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + .text : + { + __start = .; + arch/arm/cpu/armv7/start.o (.text*) + *(.text*) + } >.sram + + . = ALIGN(4); + .rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram + + . = ALIGN(4); + .data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram + + . = ALIGN(4); + __image_copy_end = .; + _end = .; + + .bss : + { + . = ALIGN(4); + __bss_start = .; + *(.bss*) + . = ALIGN(4); + __bss_end = .; + } >.sdram +} |