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authorPhilippe Mathieu-Daudé <philmd@redhat.com>2019-07-16 17:49:55 +0200
committerPhilippe Mathieu-Daudé <philmd@redhat.com>2019-07-16 17:54:06 +0200
commit611c749c3b86fe377c94ea301feab3d9ce3bf617 (patch)
treefd06973e1de7b920cdacc972e76262628a09f9ca /hw/block
parent2658594ff64828bf4230d9224b394034dae14028 (diff)
hw/block/pflash_cfi01: Start state machine as READY to accept commands
When the state machine is ready to accept command, the bit 7 of the status register (SR) is set to 1. The guest polls the status register and check this bit before writting command to the internal 'Write State Machine' (WSM). Set SR.7 bit to 1 when the device is created. There is no migration impact by this change. Reference: Read Array Flowchart "Common Flash Interface (CFI) and Command Sets" (Intel Application Note 646) Appendix B "Basic Command Set" Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20190715121338.20600-5-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Diffstat (limited to 'hw/block')
-rw-r--r--hw/block/pflash_cfi01.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index db4a246b22..435be1e35c 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -777,7 +777,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
pfl->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pflash_timer, pfl);
pfl->wcycle = 0;
pfl->cmd = 0;
- pfl->status = 0;
+ pfl->status = 0x80; /* WSM ready */
/* Hardcoded CFI table */
/* Standard "QRY" string */
pfl->cfi_table[0x10] = 'Q';