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[v3,0/3] hw/block/m25p80: Numonyx: Fix dummy cycles and check for SPI mode on cmds

Message ID 1604626378-152352-1-git-send-email-komlodi@xilinx.com
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Series hw/block/m25p80: Numonyx: Fix dummy cycles and check for SPI mode on cmds | expand

Message

Joe Komlodi Nov. 6, 2020, 1:32 a.m. UTC 
Changelog:
v2 -> v3
 - 1/3: Added, Fixes NVCFG polarity for DIO/QIO.
 - 2/3: Added, Checks if we can execute the current command in standard/DIO/QIO mode.
 - 3/3: Was 1/1 in v2.  Added cycle counts for DIO/QIO mode.
v1 -> v2
 - 1/2: Change function name to be more accurate
 - 2/2: Dropped

Hi all,

The series fixes the behavior of the dummy cycle register for Numonyx flashes so
it's closer to how hardware behaves.
It also checks if a command can be executed in the current SPI mode
(standard, DIO, or QIO) before extracting dummy cycles for the command.

On hardware, the dummy cycles for fast read commands are set to a specific value
(8 or 10) if the register is all 0s or 1s.
If the register value isn't all 0s or 1s, then the flash expects the amount of
cycles sent to be equal to the count in the register.

Thanks!
Joe

Joe Komlodi (3):
  hw/block/m25p80: Fix Numonyx NVCFG DIO and QIO bit polarity
  hw/block/m25p80: Check SPI mode before running some Numonyx commands
  hw/block/m25p80: Fix Numonyx fast read dummy cycle count

 hw/block/m25p80.c | 176 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 161 insertions(+), 15 deletions(-)