Commit graph

13 commits

Author SHA1 Message Date
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Stefan Roese
185b3b76a6 MTD: SPEAr SMI: Add write support for length < 4 bytes
Needed for redundant environment for example.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Amit Virdi <amit.virdi@st.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
2012-07-07 14:07:44 +02:00
Armando Visconti
9264077635 st_smi: Fixed page size for Winbond W25Q128FV flash
Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Amit Virdi
b5992fac88 st_smi: Change timeout loop implementation
There are two problems in the current timeout loop implementation:
1. In case initial test failing, there will always be a delay of 1 ms
2. The delay duration is not tunable

The new implementation addresses both these limitations.

Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Armando Visconti
cf9026deb8 st_smi: Fix bug in flash_print_info()
If the flash size was smaller than 1MB then flash_print_info()
was erroneously reporting 0 MB.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Armando Visconti
6d6d23c143 st_smi: Change the flash probing method
THis patch introduces a new methodology for flash probing
in which flash_devices[] table, looked-up thru the dev_id, is
used to locate the flash geometry and information.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Armando Visconti
ae3e0cc924 st_smi: Removed no needed dependency on ST_M25Pxx_ID
Since the smi erase code is very generic and works for any kind
of flash, there is no need to test for ST_M25Pxx_ID flash types
like m25p40 flashes).

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Vipin Kumar
a5ad7ccd74 st_smi: Fix smi read status
smi_read_sr fails sometimes because of TFF not getting set within assumed time.
This condition may arise because of, for example, smi memory being in a erase
mode.

This fix is to enable reading the status register until timeout.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Shiraz Hashim
a59c7b37b9 st_smi: Move status register read before modifying ctrl register
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:39 +02:00
Vipin KUMAR
0befe7d7a3 st_smi: Read status until timeout happens
SMI driver read status fails because the control register could not be
overwritten. Instead, the read status should be tried until timeout.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:38 +02:00
Amit Virdi
69fcb55f71 st_smi: Enhance the error handling
This commit does the following:
 - Reports error if SNOR flash is not found on the board
 - Changes smi_read_sr to return error using which a retry mechanism is
   implemented for reading flash status

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:38 +02:00
Amit Virdi
5c16c54124 st_smi: Return error in case TFF is not set
Curently the code makes wrong assumption that the Transfer finished flag shall
be set within the stipulated time. However, there may occur a scenario in which
the TFF flag is not set. Return error in that case.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:38 +02:00
Vipin KUMAR
f3fcf92d59 st_smi: Add support for SPEAr SMI driver
SMI is the serial memory interface controller provided by ST.

Earlier, a driver exists in the u-boot source code for the SMI IP. However, it
was specific to spear platforms. This commit converts the same driver to a more
generic driver. As a result, the driver files are renamed to st_smi.c and
st_smi.h and moved into drivers/mtd folder for reusability by other platforms
using smi controller peripheral.

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2012-07-07 14:07:38 +02:00
Renamed from drivers/mtd/spr_smi.c (Browse further)