LXR linux/arch/blackfin/include/asm/bfrom.h

   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