mirror of
https://github.com/torvalds/linux.git
synced 2024-12-17 16:43:08 +00:00
26fe19f760
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
91 lines
3.4 KiB
C
91 lines
3.4 KiB
C
/* Blackfin on-chip ROM API
|
|
*
|
|
* Copyright 2008 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __BFROM_H__
|
|
#define __BFROM_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
/* Possible syscontrol action flags */
|
|
#define SYSCTRL_READ 0x00000000 /* read registers */
|
|
#define SYSCTRL_WRITE 0x00000001 /* write registers */
|
|
#define SYSCTRL_SYSRESET 0x00000002 /* perform system reset */
|
|
#define SYSCTRL_CORERESET 0x00000004 /* perform core reset */
|
|
#define SYSCTRL_SOFTRESET 0x00000006 /* perform core and system reset */
|
|
#define SYSCTRL_VRCTL 0x00000010 /* read/write VR_CTL register */
|
|
#define SYSCTRL_EXTVOLTAGE 0x00000020 /* VDDINT supplied externally */
|
|
#define SYSCTRL_INTVOLTAGE 0x00000000 /* VDDINT generated by on-chip regulator */
|
|
#define SYSCTRL_OTPVOLTAGE 0x00000040 /* For Factory Purposes Only */
|
|
#define SYSCTRL_PLLCTL 0x00000100 /* read/write PLL_CTL register */
|
|
#define SYSCTRL_PLLDIV 0x00000200 /* read/write PLL_DIV register */
|
|
#define SYSCTRL_LOCKCNT 0x00000400 /* read/write PLL_LOCKCNT register */
|
|
#define SYSCTRL_PLLSTAT 0x00000800 /* read/write PLL_STAT register */
|
|
|
|
typedef struct ADI_SYSCTRL_VALUES {
|
|
uint16_t uwVrCtl;
|
|
uint16_t uwPllCtl;
|
|
uint16_t uwPllDiv;
|
|
uint16_t uwPllLockCnt;
|
|
uint16_t uwPllStat;
|
|
} ADI_SYSCTRL_VALUES;
|
|
|
|
static uint32_t (* const bfrom_SysControl)(uint32_t action_flags, ADI_SYSCTRL_VALUES *power_settings, void *reserved) = (void *)0xEF000038;
|
|
|
|
/* We need a dedicated function since we need to screw with the stack pointer
|
|
* when resetting. The on-chip ROM will save/restore registers on the stack
|
|
* when doing a system reset, so the stack cannot be outside of the chip.
|
|
*/
|
|
__attribute__((__noreturn__))
|
|
static inline void bfrom_SoftReset(void *new_stack)
|
|
{
|
|
while (1)
|
|
/*
|
|
* We don't declare the SP as clobbered on purpose, since
|
|
* it confuses the heck out of the compiler, and this function
|
|
* never returns
|
|
*/
|
|
__asm__ __volatile__(
|
|
"sp = %[stack];"
|
|
"jump (%[bfrom_syscontrol]);"
|
|
: : [bfrom_syscontrol] "p"(bfrom_SysControl),
|
|
"q0"(SYSCTRL_SOFTRESET),
|
|
"q1"(0),
|
|
"q2"(NULL),
|
|
[stack] "p"(new_stack)
|
|
);
|
|
}
|
|
|
|
/* OTP Functions */
|
|
static uint32_t (* const bfrom_OtpCommand)(uint32_t command, uint32_t value) = (void *)0xEF000018;
|
|
static uint32_t (* const bfrom_OtpRead)(uint32_t page, uint32_t flags, uint64_t *page_content) = (void *)0xEF00001A;
|
|
static uint32_t (* const bfrom_OtpWrite)(uint32_t page, uint32_t flags, uint64_t *page_content) = (void *)0xEF00001C;
|
|
|
|
/* otp command: defines for "command" */
|
|
#define OTP_INIT 0x00000001
|
|
#define OTP_CLOSE 0x00000002
|
|
|
|
/* otp read/write: defines for "flags" */
|
|
#define OTP_LOWER_HALF 0x00000000 /* select upper/lower 64-bit half (bit 0) */
|
|
#define OTP_UPPER_HALF 0x00000001
|
|
#define OTP_NO_ECC 0x00000010 /* do not use ECC */
|
|
#define OTP_LOCK 0x00000020 /* sets page protection bit for page */
|
|
#define OTP_CHECK_FOR_PREV_WRITE 0x00000080
|
|
|
|
/* Return values for all functions */
|
|
#define OTP_SUCCESS 0x00000000
|
|
#define OTP_MASTER_ERROR 0x001
|
|
#define OTP_WRITE_ERROR 0x003
|
|
#define OTP_READ_ERROR 0x005
|
|
#define OTP_ACC_VIO_ERROR 0x009
|
|
#define OTP_DATA_MULT_ERROR 0x011
|
|
#define OTP_ECC_MULT_ERROR 0x021
|
|
#define OTP_PREV_WR_ERROR 0x041
|
|
#define OTP_DATA_SB_WARN 0x100
|
|
#define OTP_ECC_SB_WARN 0x200
|
|
|
|
#endif
|