diff options
Diffstat (limited to 'arch/arm/cpu/armv7/u8500/cpu.c')
| -rw-r--r-- | arch/arm/cpu/armv7/u8500/cpu.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/u8500/cpu.c b/arch/arm/cpu/armv7/u8500/cpu.c new file mode 100644 index 000000000..e05eaad9b --- /dev/null +++ b/arch/arm/cpu/armv7/u8500/cpu.c @@ -0,0 +1,114 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Joakim Axelsson <joakim.axelsson at stericsson.com> + * for ST-Ericsson. + * + * Origin: Most part are moved here from old board code for u8500. + * + * License terms: GNU General Public License (GPL), version 2. + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/cpu.h> +#include <asm/arch/prcmu.h> + +#ifdef CONFIG_ARCH_CPU_INIT + +/* Old table to init ED version of db8500. Should be removed */ +unsigned int addr_vall_arr[] = { +0x8011F000, 0x0000FFFF, /* Clocks for HSI TODO Enable reqd only */ +0x8011F008, 0x00001CFF, /* Clocks for HSI TODO Enable reqd only */ +0x8000F000, 0x00007FFF, /* Clocks for I2C TODO Enable reqd only */ +0x8000F008, 0x00007FFF, /* Clocks for I2C TODO Enable reqd only */ +0x80157020, 0x00000150, /* I2C 48MHz clock */ +0x8012F000, 0x00007FFF, /* Clocks for SD TODO Enable reqd only */ +0x8012F008, 0x00007FFF, /* Clocks for SD TODO Enable reqd only */ +0xA03DF000, 0x0000000D, /* Clock for MTU Timers */ +0x8011E00C, 0x00000000, /* GPIO ALT FUNC for EMMC */ +0x8011E004, 0x0000FFE0, /* GPIO ALT FUNC for EMMC */ +0x8011E020, 0x0000FFE0, /* GPIO ALT FUNC for EMMC */ +0x8011E024, 0x00000000, /* GPIO ALT FUNC for EMMC */ +0x8012E000, 0x20000000, /* GPIO ALT FUNC for UART */ +0x8012E00C, 0x00000000, /* GPIO ALT FUNC for SD */ +0x8012E004, 0x0FFC0000, /* GPIO ALT FUNC for SD */ +0x8012E020, 0x60000000, /* GPIO ALT FUNC for SD */ +0x8012E024, 0x60000000, /* GPIO ALT FUNC for SD */ +0x801571E4, 0x0000000C, /* PRCMU settings for B2R2, PRCM_APE_RESETN_SET_REG */ +0x80157024, 0x00000130, /* PRCMU settings for EMMC/SD */ +0xA03FF000, 0x00000003, /* USB */ +0xA03FF008, 0x00000001, /* USB */ +0xA03FE00C, 0x00000000, /* USB */ +0xA03FE020, 0x00000FFF, /* USB */ +0xA03FE024, 0x00000000 /* USB */ +}; + +static void init_regs(void) +{ + /* FIXME Remove magic register array settings for ED also */ + if (u8500_is_earlydrop()) { + unsigned i; + + for (i = 0; i < ARRAY_SIZE(addr_vall_arr)/2; i++) + *((volatile unsigned int *)(addr_vall_arr[2 * i])) + = addr_vall_arr[(2 * i) + 1]; + } else { + db8500_prcmu_init(); + db8500_clocks_init(); + } +} + +/* + * SOC specific cpu init + */ +int arch_cpu_init(void) +{ + if (u8500_is_earlydrop()) + /* MTU timer clock always enabled (not clocked) */ + writel(0x20000, PRCM_TCR); + + icache_enable(); + init_regs(); + + return 0; +} +#endif /* CONFIG_ARCH_CPU_INIT */ + +#ifdef CONFIG_DISPLAY_CPUINFO +int print_cpuinfo(void) +{ + char *version, *clock; + char clockbuf[24]; + uint32_t arm_khz; + + /* CPU version: Match most likly CPU first */ + if (cpu_is_u8500v2()) + version = "v2"; + else if (cpu_is_u8500v11()) + version = "v1.1"; + else if (cpu_is_u8500v1()) + version = "v1"; + else if (u8500_is_earlydrop()) + version = "ED"; + else + version = "Unknown"; + + /* CPU clock speed */ + arm_khz = db8500_clock_cpu_khz(); + if (arm_khz == 0) + clock = "External clock"; + else { + sprintf(clockbuf, "%u.%u Mhz", + arm_khz / 1000, arm_khz % 1000); + clock = clockbuf; + } + + printf("CPU:\tST-Ericsson db8500 %s (Dual ARM Cortex A9) %s\n", + version, clock); + + return 0; +} +#endif /* CONFIG_DISPLAY_CPUINFO */ + |