diff options
Diffstat (limited to 'ichspi.c')
| -rw-r--r-- | ichspi.c | 22 |
1 files changed, 18 insertions, 4 deletions
@@ -572,7 +572,14 @@ static int ich7_run_opcode(OPCODE op, uint32_t offset, } temp16 |= ((uint16_t) (opcode_index & 0x07)) << 4; - /* Handle Atomic */ + timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */ + /* Handle Atomic. Atomic commands include three steps: + - sending the preop (mainly EWSR or WREN) + - sending the main command + - waiting for the busy bit (WIP) to be cleared + This means the timeout must be sufficient for chip erase + of slow high-capacity chips. + */ switch (op.atomic) { case 2: /* Select second preop. */ @@ -581,6 +588,7 @@ static int ich7_run_opcode(OPCODE op, uint32_t offset, case 1: /* Atomic command (preop+op) */ temp16 |= SPIC_ACS; + timeout = 100 * 1000 * 60; /* 60 seconds */ break; } @@ -591,7 +599,6 @@ static int ich7_run_opcode(OPCODE op, uint32_t offset, REGWRITE16(ICH7_REG_SPIC, temp16); /* Wait for Cycle Done Status or Flash Cycle Error. */ - timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */ while (((REGREAD16(ICH7_REG_SPIS) & (SPIS_CDS | SPIS_FCERR)) == 0) && --timeout) { programmer_delay(10); @@ -711,7 +718,14 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, } temp32 |= ((uint32_t) (opcode_index & 0x07)) << (8 + 4); - /* Handle Atomic */ + timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */ + /* Handle Atomic. Atomic commands include three steps: + - sending the preop (mainly EWSR or WREN) + - sending the main command + - waiting for the busy bit (WIP) to be cleared + This means the timeout must be sufficient for chip erase + of slow high-capacity chips. + */ switch (op.atomic) { case 2: /* Select second preop. */ @@ -720,6 +734,7 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, case 1: /* Atomic command (preop+op) */ temp32 |= SSFC_ACS; + timeout = 100 * 1000 * 60; /* 60 seconds */ break; } @@ -730,7 +745,6 @@ static int ich9_run_opcode(OPCODE op, uint32_t offset, REGWRITE32(ICH9_REG_SSFS, temp32); /* Wait for Cycle Done Status or Flash Cycle Error. */ - timeout = 100 * 60; /* 60 ms are 9.6 million cycles at 16 MHz. */ while (((REGREAD32(ICH9_REG_SSFS) & (SSFS_CDS | SSFS_FCERR)) == 0) && --timeout) { programmer_delay(10); |
