From a02c8a31bd34d0f771503783c7e4221e37ebd6d6 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Wed, 4 Feb 2015 15:53:01 +0800 Subject: ARM: atmel: arm9: switch to use common timer functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Bo Shen [rebase on current master] Signed-off-by: Andreas Bießmann --- arch/arm/mach-at91/arm926ejs/timer.c | 59 ------------------------------------ 1 file changed, 59 deletions(-) (limited to 'arch/arm/mach-at91/arm926ejs') diff --git a/arch/arm/mach-at91/arm926ejs/timer.c b/arch/arm/mach-at91/arm926ejs/timer.c index b0b7fb93fb..31ce646260 100644 --- a/arch/arm/mach-at91/arm926ejs/timer.c +++ b/arch/arm/mach-at91/arm926ejs/timer.c @@ -33,22 +33,6 @@ DECLARE_GLOBAL_DATA_PTR; #define TIMER_LOAD_VAL 0xfffff -static inline unsigned long long tick_to_time(unsigned long long tick) -{ - tick *= CONFIG_SYS_HZ; - do_div(tick, gd->arch.timer_rate_hz); - - return tick; -} - -static inline unsigned long long usec_to_tick(unsigned long long usec) -{ - usec *= gd->arch.timer_rate_hz; - do_div(usec, 1000000); - - return usec; -} - /* * Use the PITC in full 32 bit incrementing mode */ @@ -64,53 +48,10 @@ int timer_init(void) writel(TIMER_LOAD_VAL | AT91_PIT_MR_EN , &pit->mr); gd->arch.timer_rate_hz = gd->arch.mck_rate_hz / 16; - gd->arch.tbu = gd->arch.tbl = 0; return 0; } -/* - * Get the current 64 bit timer tick count - */ -unsigned long long get_ticks(void) -{ - at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT; - - ulong now = readl(&pit->piir); - - /* increment tbu if tbl has rolled over */ - if (now < gd->arch.tbl) - gd->arch.tbu++; - gd->arch.tbl = now; - return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl; -} - -void __udelay(unsigned long usec) -{ - unsigned long long start; - ulong tmo; - - start = get_ticks(); /* get current timestamp */ - tmo = usec_to_tick(usec); /* convert usecs to ticks */ - while ((get_ticks() - start) < tmo) - ; /* loop till time has passed */ -} - -/* - * get_timer(base) can be used to check for timeouts or - * to measure elasped time relative to an event: - * - * ulong start_time = get_timer(0) sets start_time to the current - * time value. - * get_timer(start_time) returns the time elapsed since then. - * - * The time is used in CONFIG_SYS_HZ units! - */ -ulong get_timer(ulong base) -{ - return tick_to_time(get_ticks()) - base; -} - /* * Return the number of timer ticks per second. */ -- cgit From 72cb3b6b54e99959f84456e448aa3db9f776f8a5 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 27 Mar 2015 14:23:33 +0800 Subject: ARM: atmel: arm926ejs: fix clock configuration Config MCKR according to the datasheet sequence, or else it will cause the MCKR configuration failed. Remove timeout checking for clock configuration, if configure the clock failed, let the system hang while not run in wrong clock configuration. Signed-off-by: Bo Shen Tested-by: Heiko Schocher --- arch/arm/mach-at91/arm926ejs/clock.c | 54 +++++++++++++++++++----------------- 1 file changed, 28 insertions(+), 26 deletions(-) (limited to 'arch/arm/mach-at91/arm926ejs') diff --git a/arch/arm/mach-at91/arm926ejs/clock.c b/arch/arm/mach-at91/arm926ejs/clock.c index f363982d03..8d6934e324 100644 --- a/arch/arm/mach-at91/arm926ejs/clock.c +++ b/arch/arm/mach-at91/arm926ejs/clock.c @@ -195,50 +195,52 @@ int at91_clock_init(unsigned long main_clock) void at91_plla_init(u32 pllar) { struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; - int timeout = AT91_PLL_LOCK_TIMEOUT; writel(pllar, &pmc->pllar); - while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) { - timeout--; - if (timeout == 0) - break; - } + while (!(readl(&pmc->sr) & AT91_PMC_LOCKA)) + ; } void at91_pllb_init(u32 pllbr) { struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; - int timeout = AT91_PLL_LOCK_TIMEOUT; writel(pllbr, &pmc->pllbr); - while (!(readl(&pmc->sr) & (AT91_PMC_LOCKB | AT91_PMC_MCKRDY))) { - timeout--; - if (timeout == 0) - break; - } + while (!(readl(&pmc->sr) & AT91_PMC_LOCKB)) + ; } void at91_mck_init(u32 mckr) { struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; - int timeout = AT91_PLL_LOCK_TIMEOUT; u32 tmp; tmp = readl(&pmc->mckr); - tmp &= ~(AT91_PMC_MCKR_PRES_MASK | - AT91_PMC_MCKR_MDIV_MASK | - AT91_PMC_MCKR_PLLADIV_MASK | - AT91_PMC_MCKR_CSS_MASK); - tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK | - AT91_PMC_MCKR_MDIV_MASK | - AT91_PMC_MCKR_PLLADIV_MASK | - AT91_PMC_MCKR_CSS_MASK); + tmp &= ~AT91_PMC_MCKR_PRES_MASK; + tmp |= mckr & AT91_PMC_MCKR_PRES_MASK; writel(tmp, &pmc->mckr); + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; - while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) { - timeout--; - if (timeout == 0) - break; - } + tmp = readl(&pmc->mckr); + tmp &= ~AT91_PMC_MCKR_MDIV_MASK; + tmp |= mckr & AT91_PMC_MCKR_MDIV_MASK; + writel(tmp, &pmc->mckr); + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; + + tmp = readl(&pmc->mckr); + tmp &= ~AT91_PMC_MCKR_PLLADIV_MASK; + tmp |= mckr & AT91_PMC_MCKR_PLLADIV_MASK; + writel(tmp, &pmc->mckr); + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; + + tmp = readl(&pmc->mckr); + tmp &= ~AT91_PMC_MCKR_CSS_MASK; + tmp |= mckr & AT91_PMC_MCKR_CSS_MASK; + writel(tmp, &pmc->mckr); + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; } void at91_periph_clk_enable(int id) -- cgit From 41d41a93fb5600b0cbfdbfae88b0d8403bd650b7 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 27 Mar 2015 14:23:34 +0800 Subject: ARM: atmel: at91sam9m10g45ek: enable spl support Supports boot up from NAND flash with software ECC eanbled. And supports boot up from SD/MMC card with FAT file system. As the boot from SD/MMC card with FAT file system, the BSS segment is too big to fit into SRAM, so, use the lds to put it into SDRAM. Signed-off-by: Bo Shen --- arch/arm/mach-at91/arm926ejs/u-boot-spl.lds | 48 +++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 arch/arm/mach-at91/arm926ejs/u-boot-spl.lds (limited to 'arch/arm/mach-at91/arm926ejs') diff --git a/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds b/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds new file mode 100644 index 0000000000..acadd1d4c4 --- /dev/null +++ b/arch/arm/mach-at91/arm926ejs/u-boot-spl.lds @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2015 Atmel Corporation + * Bo Shen + * + * 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 = .; + *(.vectors) + arch/arm/cpu/arm926ejs/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 : + { + *(.__end) + } >.sram + + .bss : + { + . = ALIGN(4); + __bss_start = .; + *(.bss*) + . = ALIGN(4); + __bss_end = .; + } >.sdram +} -- cgit