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lwmon5: Fix register test logic to match the specific GDC h/w.

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Signed-off-by: Dmitry Rakhchev <rda@emcraft.com>
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
This commit is contained in:
Yuri Tikhonov 2008-03-18 13:33:30 +01:00 committed by Wolfgang Denk
parent 46bc0a9387
commit 23e20aa648
1 changed files with 12 additions and 6 deletions
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18
post/board/lwmon5/gdc.c
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@ -35,7 +35,7 @@
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
#define GDC_SCRATCH_REG 0xC1FF8008 #define GDC_SCRATCH_REG 0xC1FF8044
#define GDC_VERSION_REG 0xC1FF8084 #define GDC_VERSION_REG 0xC1FF8084
#define GDC_RAM_START 0xC0000000 #define GDC_RAM_START 0xC0000000
#define GDC_RAM_END 0xC2000000 #define GDC_RAM_END 0xC2000000
@ -44,7 +44,7 @@ DECLARE_GLOBAL_DATA_PTR;
static int gdc_test_reg_one(uint value) static int gdc_test_reg_one(uint value)
{ {
int ret = 0; int ret;
uint read_value; uint read_value;
/* write test pattern */ /* write test pattern */
@ -56,10 +56,9 @@ static int gdc_test_reg_one(uint value)
if (read_value != value) { if (read_value != value) {
post_log("GDC SCRATCH test failed write %08X, read %08X\n", post_log("GDC SCRATCH test failed write %08X, read %08X\n",
value, read_value); value, read_value);
ret = 1;
} }
return ret; return (read_value != value);
} }
/* Verify GDC, get memory size */ /* Verify GDC, get memory size */
@ -71,9 +70,16 @@ int gdc_post_test(int flags)
post_log("\n"); post_log("\n");
old_value = in_be32((void *)GDC_SCRATCH_REG); old_value = in_be32((void *)GDC_SCRATCH_REG);
if (gdc_test_reg_one(0x55555555)) /*
* GPIOC2 register behaviour: the LIME graphics processor has a
* maximum of 5 GPIO ports that can be used in this hardware
* configuration. Thus only the bits for these 5 GPIOs can be
* activated in the GPIOC2 register. All other bits will always be
* read as zero.
*/
if (gdc_test_reg_one(0x00150015))
ret = 1; ret = 1;
if (gdc_test_reg_one(0xAAAAAAAA)) if (gdc_test_reg_one(0x000A000A))
ret = 1; ret = 1;
out_be32((void *)GDC_SCRATCH_REG, old_value); out_be32((void *)GDC_SCRATCH_REG, old_value);