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
28 typedef 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
36 static 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__))
bfrom_SoftReset(void * new_stack)43 static 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 */
63 static uint32_t (* const bfrom_OtpCommand)(uint32_t command, uint32_t value) = (void *)0xEF000018;
64 static uint32_t (* const bfrom_OtpRead)(uint32_t page, uint32_t flags, uint64_t *page_content) = (void *)0xEF00001A;
65 static 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