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| author | David Borg <borg.db@gmail.com> | 2012-05-05 20:43:42 +0000 |
|---|---|---|
| committer | Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> | 2012-05-05 20:43:42 +0000 |
| commit | 403ccee9ede252a9d113a7ba1c971f23b6841acf (patch) | |
| tree | db47bdf25e2bc864c97581b7de1f9a097fcb628b | |
| parent | ba364820dc941c7a4e3a91009b506e57b1411d42 (diff) | |
| download | flashrom-403ccee9ede252a9d113a7ba1c971f23b6841acf.zip flashrom-403ccee9ede252a9d113a7ba1c971f23b6841acf.tar.gz | |
Function to enable the flash interface on w83697 family SuperIO chips
Not hooked up to the superio detection framework yet.
Corresponding to flashrom svn r1529.
Signed-off-by: David Borg <borg.db@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
| -rw-r--r-- | board_enable.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/board_enable.c b/board_enable.c index 0522590..440a77a 100644 --- a/board_enable.c +++ b/board_enable.c @@ -380,6 +380,39 @@ static void w836xx_memw_enable(uint16_t port) w836xx_ext_leave(port); } +/** + * Enable MEMW# and set ROM size to max. + * Supported chips: + * W83697HF/F/HG, W83697SF/UF/UG + */ +void w83697xx_memw_enable(uint16_t port) +{ + w836xx_ext_enter(port); + if (!(sio_read(port, 0x24) & 0x02)) { /* Flash ROM enabled? */ + if((sio_read(port, 0x2A) & 0xF0) == 0xF0) { + + /* CR24 Bits 7 & 2 must be set to 0 enable the flash ROM */ + /* address segments 000E0000h ~ 000FFFFFh on W83697SF/UF/UG */ + /* These bits are reserved on W83697HF/F/HG */ + /* Shouldn't be needed though. */ + + /* CR28 Bit3 must be set to 1 to enable flash access to */ + /* FFE80000h ~ FFEFFFFFh on W83697SF/UF/UG. */ + /* This bit is reserved on W83697HF/F/HG which default to 0 */ + sio_mask(port, 0x28, 0x08, 0x08); + + /* Enable MEMW# and set ROM size select to max. (4M)*/ + sio_mask(port, 0x24, 0x28, 0x38); + + } else { + msg_perr("WARNING: Flash interface in use by GPIO!\n"); + } + } else { + msg_pinfo("BIOS ROM is disabled\n"); + } + w836xx_ext_leave(port); +} + /* * Suited for: * - EPoX EP-8K5A2: VIA KT333 + VT8235 |
