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