1 /* 2 * (C) Copyright 2010 3 * Reinhard Meyer, reinhard.meyer@emk-elektronik.de 4 * (C) Copyright 2009 5 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 6 * (C) Copyright 2013 7 * Bo Shen <voice.shen@atmel.com> 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <asm/io.h> 14 #include <asm/arch/hardware.h> 15 #include <asm/arch/at91_pmc.h> 16 #include <asm/arch/at91_pit.h> 17 #include <asm/arch/at91_gpbr.h> 18 #include <asm/arch/clk.h> 19 20 #ifndef CONFIG_SYS_AT91_MAIN_CLOCK 21 #define CONFIG_SYS_AT91_MAIN_CLOCK 0 22 #endif 23 24 int arch_cpu_init(void) 25 { 26 return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); 27 } 28 29 void arch_preboot_os(void) 30 { 31 ulong cpiv; 32 at91_pit_t *pit = (at91_pit_t *)ATMEL_BASE_PIT; 33 34 cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir)); 35 36 /* 37 * Disable PITC 38 * Add 0x1000 to current counter to stop it faster 39 * without waiting for wrapping back to 0 40 */ 41 writel(cpiv + 0x1000, &pit->mr); 42 } 43 44 #if defined(CONFIG_DISPLAY_CPUINFO) 45 int print_cpuinfo(void) 46 { 47 char buf[32]; 48 49 printf("CPU: %s\n", get_cpu_name()); 50 printf("Crystal frequency: %8s MHz\n", 51 strmhz(buf, get_main_clk_rate())); 52 printf("CPU clock : %8s MHz\n", 53 strmhz(buf, get_cpu_clk_rate())); 54 printf("Master clock : %8s MHz\n", 55 strmhz(buf, get_mck_clk_rate())); 56 57 return 0; 58 } 59 #endif 60 61 void enable_caches(void) 62 { 63 icache_enable(); 64 dcache_enable(); 65 } 66 67 #define ATMEL_CHIPID_CIDR_VERSION 0x1f 68 69 unsigned int get_chip_id(void) 70 { 71 return readl(ATMEL_CHIPID_CIDR) & ~ATMEL_CHIPID_CIDR_VERSION; 72 } 73 74 unsigned int get_extension_chip_id(void) 75 { 76 return readl(ATMEL_CHIPID_EXID); 77 } 78