1/* Blackfin on-chip ROM API 2 * 3 * Copyright 2008 Analog Devices Inc. 4 * 5 * Licensed under the GPL-2 or later. 6 */ 7 8#ifndef __BFROM_H__ 9#define __BFROM_H__ 10 11#include <linux/types.h> 12 13/* Possible syscontrol action flags */ 14#define SYSCTRL_READ 0x00000000 /* read registers */ 15#define SYSCTRL_WRITE 0x00000001 /* write registers */ 16#define SYSCTRL_SYSRESET 0x00000002 /* perform system reset */ 17#define SYSCTRL_CORERESET 0x00000004 /* perform core reset */ 18#define SYSCTRL_SOFTRESET 0x00000006 /* perform core and system reset */ 19#define SYSCTRL_VRCTL 0x00000010 /* read/write VR_CTL register */ 20#define SYSCTRL_EXTVOLTAGE 0x00000020 /* VDDINT supplied externally */ 21#define SYSCTRL_INTVOLTAGE 0x00000000 /* VDDINT generated by on-chip regulator */ 22#define SYSCTRL_OTPVOLTAGE 0x00000040 /* For Factory Purposes Only */ 23#define SYSCTRL_PLLCTL 0x00000100 /* read/write PLL_CTL register */ 24#define SYSCTRL_PLLDIV 0x00000200 /* read/write PLL_DIV register */ 25#define SYSCTRL_LOCKCNT 0x00000400 /* read/write PLL_LOCKCNT register */ 26#define SYSCTRL_PLLSTAT 0x00000800 /* read/write PLL_STAT register */ 27 28typedef struct ADI_SYSCTRL_VALUES { 29 uint16_t uwVrCtl; 30 uint16_t uwPllCtl; 31 uint16_t uwPllDiv; 32 uint16_t uwPllLockCnt; 33 uint16_t uwPllStat; 34} ADI_SYSCTRL_VALUES; 35 36static uint32_t (* const bfrom_SysControl)(uint32_t action_flags, ADI_SYSCTRL_VALUES *power_settings, void *reserved) = (void *)0xEF000038; 37 38/* We need a dedicated function since we need to screw with the stack pointer 39 * when resetting. The on-chip ROM will save/restore registers on the stack 40 * when doing a system reset, so the stack cannot be outside of the chip. 41 */ 42__attribute__((__noreturn__)) 43static inline void bfrom_SoftReset(void *new_stack) 44{ 45 while (1) 46 /* 47 * We don't declare the SP as clobbered on purpose, since 48 * it confuses the heck out of the compiler, and this function 49 * never returns 50 */ 51 __asm__ __volatile__( 52 "sp = %[stack];" 53 "jump (%[bfrom_syscontrol]);" 54 : : [bfrom_syscontrol] "p"(bfrom_SysControl), 55 "q0"(SYSCTRL_SOFTRESET), 56 "q1"(0), 57 "q2"(NULL), 58 [stack] "p"(new_stack) 59 ); 60} 61 62/* OTP Functions */ 63static uint32_t (* const bfrom_OtpCommand)(uint32_t command, uint32_t value) = (void *)0xEF000018; 64static uint32_t (* const bfrom_OtpRead)(uint32_t page, uint32_t flags, uint64_t *page_content) = (void *)0xEF00001A; 65static uint32_t (* const bfrom_OtpWrite)(uint32_t page, uint32_t flags, uint64_t *page_content) = (void *)0xEF00001C; 66 67/* otp command: defines for "command" */ 68#define OTP_INIT 0x00000001 69#define OTP_CLOSE 0x00000002 70 71/* otp read/write: defines for "flags" */ 72#define OTP_LOWER_HALF 0x00000000 /* select upper/lower 64-bit half (bit 0) */ 73#define OTP_UPPER_HALF 0x00000001 74#define OTP_NO_ECC 0x00000010 /* do not use ECC */ 75#define OTP_LOCK 0x00000020 /* sets page protection bit for page */ 76#define OTP_CHECK_FOR_PREV_WRITE 0x00000080 77 78/* Return values for all functions */ 79#define OTP_SUCCESS 0x00000000 80#define OTP_MASTER_ERROR 0x001 81#define OTP_WRITE_ERROR 0x003 82#define OTP_READ_ERROR 0x005 83#define OTP_ACC_VIO_ERROR 0x009 84#define OTP_DATA_MULT_ERROR 0x011 85#define OTP_ECC_MULT_ERROR 0x021 86#define OTP_PREV_WR_ERROR 0x041 87#define OTP_DATA_SB_WARN 0x100 88#define OTP_ECC_SB_WARN 0x200 89 90#endif 91