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[Qemu-devel] [PATCH 04/12] hw/nand: Support multiple reads following REA
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 04/12] hw/nand: Support multiple reads following READ STATUS |
Date: |
Fri, 15 Jul 2011 15:58:18 +0100 |
From: Juha Riihimäki <address@hidden>
After receiving READ STATUS command all subsequent IO reads should return
the status register value until another command is issued.
Signed-off-by: Juha Riihimäki <address@hidden>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <address@hidden>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <address@hidden>
---
hw/nand.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/hw/nand.c b/hw/nand.c
index 2e98f25..e6c551d 100644
--- a/hw/nand.c
+++ b/hw/nand.c
@@ -496,9 +496,14 @@ uint32_t nand_getio(NANDFlashState *s)
for (offset = s->buswidth; offset--;) {
x |= s->ioaddr[offset] << (offset << 3);
}
- s->addr += s->buswidth;
- s->ioaddr += s->buswidth;
- s->iolen -= s->buswidth;
+ /* after receiving READ STATUS command all subsequent reads will
+ * return the status register value until another command is issued
+ */
+ if (s->cmd != NAND_CMD_READSTATUS) {
+ s->addr += s->buswidth;
+ s->ioaddr += s->buswidth;
+ s->iolen -= s->buswidth;
+ }
return x;
}
--
1.7.1
- [Qemu-devel] [PATCH 00/12] bugfix and qdevify NAND and ONENAND devices, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 10/12] hw/onenand: program actions can only clear bits, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 06/12] hw/nand: qdevify, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 05/12] hw/nand: Writing to NAND can only clear bits, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 11/12] hw/sysbus: Add sysbus_mmio_unmap() for unmapping a region, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 08/12] onenand: Handle various ID fields separately, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 12/12] hw/onenand: qdevify, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 02/12] hw/nand: Support large NAND devices, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 09/12] onenand: Ignore zero writes to boot command space, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 07/12] onenand: Pass BlockDriverState to init function, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 04/12] hw/nand: Support multiple reads following READ STATUS,
Peter Maydell <=
- [Qemu-devel] [PATCH 03/12] hw/nand: Support devices wider than 8 bits, Peter Maydell, 2011/07/15
- [Qemu-devel] [PATCH 01/12] hw/nand: Pass block device state to init function, Peter Maydell, 2011/07/15
- Re: [Qemu-devel] [PATCH 00/12] bugfix and qdevify NAND and ONENAND devices, Peter Maydell, 2011/07/28