diff options
| -rw-r--r-- | hw/block/m25p80.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index 3f55b8f385..411d810d3b 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -430,6 +430,11 @@ typedef enum { RDCR_EQIO = 0x35, RSTQIO = 0xf5, + /* + * Winbond: 0x31 - write status register 2 + */ + WRSR2 = 0x31, + RNVCR = 0xB5, WNVCR = 0xB1, @@ -821,6 +826,15 @@ static void complete_collecting_data(Flash *s) s->write_enable = false; } break; + case WRSR2: + switch (get_man(s)) { + case MAN_WINBOND: + s->quad_enable = !!(s->data[0] & 0x02); + break; + default: + break; + } + break; case BRWR: case EXTEND_ADDR_WRITE: s->ear = s->data[0]; @@ -1280,7 +1294,31 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; break; + case WRSR2: + /* + * If WP# is low and status_register_write_disabled is high, + * status register writes are disabled. + * This is also called "hardware protected mode" (HPM). All other + * combinations of the two states are called "software protected mode" + * (SPM), and status register writes are permitted. + */ + if ((s->wp_level == 0 && s->status_register_write_disabled) + || !s->write_enable) { + qemu_log_mask(LOG_GUEST_ERROR, + "M25P80: Status register 2 write is disabled!\n"); + break; + } + switch (get_man(s)) { + case MAN_WINBOND: + s->needed_bytes = 1; + s->state = STATE_COLLECTING_DATA; + s->pos = 0; + break; + default: + break; + } + break; case WRDI: s->write_enable = false; if (get_man(s) == MAN_SST) { |