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cif: fix ddr2 configuration

This commit is contained in:
Florent Kermarrec 2013-07-18 23:10:15 +02:00 committed by Sebastien Bourdeauducq
parent 38e8ea683e
commit 764e7c07e4
1 changed files with 10 additions and 2 deletions
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12
milkymist/cif.py
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@ -180,19 +180,27 @@ static void command_p{n}(int cmd)
elif sdram_phy.phy_settings.memtype == "DDR2": elif sdram_phy.phy_settings.memtype == "DDR2":
bl = 2*sdram_phy.phy_settings.nphases bl = 2*sdram_phy.phy_settings.nphases
mr = log2_int(bl) + (cl << 4) wr = 2
mr = log2_int(bl) + (cl << 4) + (wr << 9)
emr = 0 emr = 0
emr2 = 0
emr3 = 0
reset_dll = 1 << 8 reset_dll = 1 << 8
ocd = 7 << 7
init_sequence = [ init_sequence = [
("Bring CKE high", 0x0000, 0, cmds["CKE"], 2000), ("Bring CKE high", 0x0000, 0, cmds["CKE"], 2000),
("Precharge All", 0x0400, 0, cmds["PRECHARGE_ALL"], 0), ("Precharge All", 0x0400, 0, cmds["PRECHARGE_ALL"], 0),
("Load Extended Mode Register 3", emr3, 3, cmds["MODE_REGISTER"], 0),
("Load Extended Mode Register 2", emr2, 2, cmds["MODE_REGISTER"], 0),
("Load Extended Mode Register", emr, 1, cmds["MODE_REGISTER"], 0), ("Load Extended Mode Register", emr, 1, cmds["MODE_REGISTER"], 0),
("Load Mode Register / Reset DLL, CL={0:d}, BL={1:d}".format(cl, bl), mr + reset_dll, 0, cmds["MODE_REGISTER"], 200), ("Load Mode Register / Reset DLL, CL={0:d}, BL={1:d}".format(cl, bl), mr + reset_dll, 0, cmds["MODE_REGISTER"], 200),
("Precharge All", 0x0400, 0, cmds["PRECHARGE_ALL"], 0), ("Precharge All", 0x0400, 0, cmds["PRECHARGE_ALL"], 0),
("Auto Refresh", 0x0, 0, cmds["AUTO_REFRESH"], 4), ("Auto Refresh", 0x0, 0, cmds["AUTO_REFRESH"], 4),
("Auto Refresh", 0x0, 0, cmds["AUTO_REFRESH"], 4), ("Auto Refresh", 0x0, 0, cmds["AUTO_REFRESH"], 4),
("Load Mode Register / CL={0:d}, BL={1:d}".format(cl, bl), mr, 0, cmds["MODE_REGISTER"], 200) ("Load Mode Register / CL={0:d}, BL={1:d}".format(cl, bl), mr, 0, cmds["MODE_REGISTER"], 200),
("Load Extended Mode Register / OCD Default", emr+ocd, 1, cmds["MODE_REGISTER"], 0),
("Load Extended Mode Register / OCD Exit", emr, 1, cmds["MODE_REGISTER"], 0),
] ]
for comment, a, ba, cmd, delay in init_sequence: for comment, a, ba, cmd, delay in init_sequence: