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Some timing in here, but we don't set; it breaks. 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1179 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich 2003-10-02 23:33:01 +00:00
parent ee163f3c18
commit fae510cd84
1 changed files with 22 additions and 0 deletions
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22
src/northbridge/via/vt8601/raminit.c
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@ -244,7 +244,29 @@ do_module_size(unsigned char slot) { /*, unsigned char base) */
} }
static void sdram_set_spd_registers(const struct mem_controller *ctrl) { static void sdram_set_spd_registers(const struct mem_controller *ctrl) {
#define T133 7
unsigned char Trp = 1, Tras = 1, casl = 2, val;
unsigned char timing = 0xe4;
/* read Trp */
val = smbus_read_byte(0xa0, 27);
if (val < 2*T133)
Trp = 1;
val = smbus_read_byte(0xa0, 30);
if (val < 5*T133)
Tras = 0;
val = smbus_read_byte(0xa0, 18);
if (val < 8)
casl = 1;
if (val < 4)
casl = 0;
val = (Trp << 7) | (Tras << 6) | (casl << 4) | 4;
print_err_hex8(val); print_err(" is the computed timing\n");
/* don't set it. Experience shows that this screwy chipset should just
* be run with the most conservative timing.
* pci_write_config8(0, 0x64, val);
*/
} }
static void sdram_enable(int controllers, const struct mem_controller *ctrl) { static void sdram_enable(int controllers, const struct mem_controller *ctrl) {