Home Verkennen Help
Inloggen
phreedom2600net
/
linux-libre
Volgen 2
Ster 0
Vork 0
Bestanden Kwesties 0 Pull-aanvragen 0 Wiki
Boom: 0d5005ec5c
Aftakkingen Labels
linux-libre
/
arch
/
sh
/
boards
/
mach-ecovec24
/
sdram.S

sdram.S 2.8 KB
Geschiedenis Ruwe

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112 
  1. /*
    2. 

  2.  * Ecovec24 sdram self/auto-refresh setup code
    3. 

  3.  *
    4. 

  4.  *  Copyright (C) 2009 Magnus Damm
    5. 

  5.  *
    6. 

  6.  * This file is subject to the terms and conditions of the GNU General Public
    7. 

  7.  * License.  See the file "COPYING" in the main directory of this archive
    8. 

  8.  * for more details.
    9. 

  9.  */
    10. 

  10. 

  11. #include <linux/sys.h>
    12. 

  12. #include <linux/errno.h>
    13. 

  13. #include <linux/linkage.h>
    14. 

  14. #include <asm/asm-offsets.h>
    15. 

  15. #include <asm/suspend.h>
    16. 

  16. #include <asm/romimage-macros.h>
    17. 

  17. 

  18. /* code to enter and leave self-refresh. must be self-contained.
    19. 

  19.  * this code will be copied to on-chip memory and executed from there.
    20. 

  20.  */
    21. 

  21. 	.balign 4
    22. 

  22. ENTRY(ecovec24_sdram_enter_start)
    23. 

  23. 

  24. 	/* DBSC: put memory in self-refresh mode */
    25. 

  25. 

  26. 	ED 0xFD000010, 0x00000000 /* DBEN */
    27. 

  27. 	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
    28. 

  28. 	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
    29. 

  29. 	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
    30. 

  30. 	ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
    31. 

  31. 

  32. 	rts
    33. 

  33. 	 nop
    34. 

  34. 

  35. ENTRY(ecovec24_sdram_enter_end)
    36. 

  36. 

  37. 	.balign 4
    38. 

  38. ENTRY(ecovec24_sdram_leave_start)
    39. 

  39. 

  40. 	mov.l	@(SH_SLEEP_MODE, r5), r0
    41. 

  41. 	tst	#SUSP_SH_RSTANDBY, r0
    42. 

  42. 	bf	resume_rstandby
    43. 

  43. 

  44. 	/* DBSC: put memory in auto-refresh mode */
    45. 

  45. 

  46. 	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
    47. 

  47. 	WAIT 1
    48. 

  48. 	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
    49. 

  49. 	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
    50. 

  50. 	ED 0xFD000010, 0x00000001 /* DBEN */
    51. 

  51. 	ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
    52. 

  52. 

  53. 	rts
    54. 

  54. 	 nop
    55. 

  55. 

  56. resume_rstandby:
    57. 

  57. 

  58. 	/* DBSC: re-initialize and put in auto-refresh */
    59. 

  59. 

  60. 	ED 0xFD000108, 0x00000181 /* DBPDCNT0 */
    61. 

  61. 	ED 0xFD000020, 0x015B0002 /* DBCONF */
    62. 

  62. 	ED 0xFD000030, 0x03071502 /* DBTR0 */
    63. 

  63. 	ED 0xFD000034, 0x02020102 /* DBTR1 */
    64. 

  64. 	ED 0xFD000038, 0x01090405 /* DBTR2 */
    65. 

  65. 	ED 0xFD00003C, 0x00000002 /* DBTR3 */
    66. 

  66. 	ED 0xFD000008, 0x00000005 /* DBKIND */
    67. 

  67. 	ED 0xFD000040, 0x00000001 /* DBRFPDN0 */
    68. 

  68. 	ED 0xFD000040, 0x00000000 /* DBRFPDN0 */
    69. 

  69. 	ED 0xFD000018, 0x00000001 /* DBCKECNT */
    70. 

  70. 

  71. 	mov	#100,r0
    72. 

  72. WAIT_400NS:
    73. 

  73. 	dt	r0
    74. 

  74. 	bf	WAIT_400NS
    75. 

  75. 

  76. 	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
    77. 

  77. 	ED 0xFD000060, 0x00020000 /* DBMRCNT (EMR2) */
    78. 

  78. 	ED 0xFD000060, 0x00030000 /* DBMRCNT (EMR3) */
    79. 

  79. 	ED 0xFD000060, 0x00010004 /* DBMRCNT (EMR) */
    80. 

  80. 	ED 0xFD000060, 0x00000532 /* DBMRCNT (MRS) */
    81. 

  81. 	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
    82. 

  82. 	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
    83. 

  83. 	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
    84. 

  84. 	ED 0xFD000060, 0x00000432 /* DBMRCNT (MRS) */
    85. 

  85. 	ED 0xFD000060, 0x000103c0 /* DBMRCNT (EMR) */
    86. 

  86. 	ED 0xFD000060, 0x00010040 /* DBMRCNT (EMR) */
    87. 

  87. 

  88. 	mov	#100,r0
    89. 

  89. WAIT_400NS_2:
    90. 

  90. 	dt	r0
    91. 

  91. 	bf	WAIT_400NS_2
    92. 

  92. 

  93. 	ED 0xFD000010, 0x00000001 /* DBEN */
    94. 

  94. 	ED 0xFD000044, 0x0000050f /* DBRFPDN1 */
    95. 

  95. 	ED 0xFD000048, 0x236800e6 /* DBRFPDN2 */
    96. 

  96. 

  97. 	mov.l	DUMMY,r0
    98. 

  98. 	mov.l	@r0, r1 /* force single dummy read */
    99. 

  99. 

  100. 	ED 0xFD000014, 0x00000002 /* DBCMDCNT (PALL) */
    101. 

  101. 	ED 0xFD000014, 0x00000004 /* DBCMDCNT (REF) */
    102. 

  102. 	ED 0xFD000108, 0x00000080 /* DBPDCNT0 */
    103. 

  103. 	ED 0xFD000040, 0x00010000 /* DBRFPDN0 */
    104. 

  104. 

  105. 	rts
    106. 

  106. 	 nop
    107. 

  107. 

  108. 	.balign 4
    109. 

  109. DUMMY:	.long	0xac400000
    110. 

  110. 

  111. ENTRY(ecovec24_sdram_leave_end)
    112. 

  112.