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#include <u.h>
#include "dat.h"
#include "fns.h"
enum {
QSPI_CFG,
QSPI_STATUS,
QSPI_EN = 5,
QSPI_TXD4 = 7,
QSPI_RXD,
QSPI_TXD1 = 32,
QSPI_TXD2,
QSPI_TXD3
};
#define QSPI0 ((void *) 0xE000D000)
static u32int
cmd(ulong *r, int sz, u32int c)
{
if(sz == 4)
r[QSPI_TXD4] = c;
else
r[QSPI_TXD1 + sz - 1] = c;
r[QSPI_CFG] |= 1<<16;
while((r[QSPI_STATUS] & (1<<2|1<<4)) != (1<<2|1<<4))
;
return r[QSPI_RXD];
}
void
flash(void)
{
ulong *r;
r = QSPI0;
r[QSPI_CFG] = 1<<31 | 1<<19 | 3<<6 | 1<<15 | 1<<14 | 1<<10 | 1<<3 | 1;
r[QSPI_CFG] &= ~(1<<10);
r[QSPI_EN] = 1;
cmd(r, 1, 0x06);
// cmd(r, 3, 0xD8);
for(;;)
print("%x\n", cmd(r, 2, 0x05));
}
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