Commit graph

20 commits

Author SHA1 Message Date
Martin Hejnfelt
5f89a15e16 omap3: Fix SPI registers on am33xx and am43xx
When the base registers are read from device tree the base is not
0x48030100 as the driver expects, but 0x48030000, resulting in
non functioning SPI. To deal with this, use same idea as how this
is done in the linux kernel (drivers/spi/spi-omap2-mcspi.c) and
add a structure with a field that is used to shift the registers
on these systems.

v2: Fixed commit subject line to correct cpu

Signed-off-by: Martin Hejnfelt <mh@newtec.dk>
2016-05-23 11:50:22 -04:00
Jagan Teki
41bccb8142 spi: omap3: Fix multiple definition of 'priv'
Global definition of priv seems no-sense to use it
for non-dm case and pass the pointer to functions
which are common to both dm and non-dm.

So, fix this by removing omap3_spi_slave from non-dm
and make visible to omap3_spi_priv for both dm and non-dm.

Cc: Christophe Ricard <christophe-h.ricard@st.com>
Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
2016-03-15 14:50:09 -04:00
Jagan Teki
77b8d04854 spi: omap3: Convert to driver model
After this conversion the driver will able to support both dm and non-dm
and code is more extensible like we can remove the non-dm part simply
without touching anycode if all the boards which are using this driver
become dm driven.

Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard <christophe-h.ricard@st.com>
Tested-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
[Set priv->wordlen, Add Kconfig entry and file credit for dm conversion]
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
2016-03-14 22:46:28 +05:30
Jagan Teki
03661d85f0 spi: omap3: Make local functions as static
Attach static on local defined functions.

Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
2016-03-14 22:46:28 +05:30
Jagan Teki
682c172350 spi: omap3: Move headers code inside the driver
Header file have macro's and register definition and some unneeded
function proto types which becomes tunned further in future patches
and entire driver code resides in one file for more readability.

Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
[Fixes on code styles, Remove omap3_spi_txrx|write|read in header]
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
2016-03-14 22:46:16 +05:30
Christophe Ricard
3963919e5b spi: omap3: Remove unused variable irqstatus in omap3_spi_txrx
Remove unused variable irqstatus in omap3_spi_txrx

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
2016-02-23 16:14:46 +05:30
David Dueck
611c9ba2b8 spi: omap3: Fix timeout handling
The timeout value is never reset during the transfer. This means that when
transferring more data we eventually trigger the timeout.

This was reported on the mailing list:
"Spansion SPI flash read timeout with AM335x"

Signed-off-by: David Dueck <davidcdueck@googlemail.com>
CC: Tom Rini <trini@konsulko.com>
CC: Stefan Roese <sr@denx.de>
CC: Andy Pont <andy.pont@sdcsystems.com>
Tested-by: David Dueck <davidcdueck@googlemail.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
2015-04-27 21:08:42 +05:30
Vasili Galka
ce6889a997 drivers/spi/omap3: Bug fix of premature write transfer completion
The logic determining SPI "write" transfer completion was faulty. At
certain conditions (e.g. slow SPI clock freq) the transfers were
interrupted before completion. Both EOT and TXS flags of channel
status registeer shall be checked to ensure that all data was
transferred. Tested on AM3359 chip.

Signed-off-by: Vasili Galka <vasili@visionmap.com>
2014-03-12 16:22:12 -04:00
Nikita Kiryanov
5753d09b10 spi: omap3: add support for more word lengths
Current implementation only supports 8 bit word lengths, even though
omap3 can handle anything between 4 and 32.

Update the spi interface to support changing the SPI word length,
and implement it in omap3_spi driver to support the full range of
possible word lengths.
This implementation is backwards compatible by defaulting to the old
behavior of 8 bit word lengths.
Also, it required a change to the omap3_spi non static I/O functions,
but since they are not used anywhere else, no collateral changes are required.

Cc: Tom Rini <trini@ti.com>
Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
2013-11-12 10:02:44 +01:00
Nikita Kiryanov
54a759c880 spi: omap3: remove semicolon from #define
Remove unnecessary semicolon from #define SPI_WAIT_TIMEOUT

Cc: Tom Rini <trini@ti.com>
Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Gerhard Sittig <gsi@denx.de>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
2013-11-12 10:00:36 +01:00
Wolfgang Denk
93e1459641 Coding Style cleanup: replace leading SPACEs by TABs
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Drop changes for PEP 4 following python tools]
Signed-off-by: Tom Rini <trini@ti.com>
2013-10-14 16:06:54 -04:00
Wolfgang Denk
3765b3e7bd Coding Style cleanup: remove trailing white space
Signed-off-by: Wolfgang Denk <wd@denx.de>
2013-10-14 16:06:53 -04:00
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
Simon Glass
d3504fee73 spi: Use spi_alloc_slave() in each SPI driver
Rather than each driver having its own way to allocate a SPI slave,
use the new allocation function everywhere. This will make it easier
to extend the interface without breaking drivers.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-19 08:45:36 -07:00
ajoy
cc1182beea OMAP3 SPI : Fixed bugs related to SPI transfer
Added posted writes (read after writes) to effect the
change immediately for channel confiuration and channel
enable register

Disable the channel to purge receieve data in TX_ONLY
mode transfer otherwise rx data will get affected by
the next immediate RX_ONLY mode transfer

Wait for the EOT bit to be set after last byte has been
loaded to TX shift register in the the TX_ONLY mode.This
ensures TX data has been completely shifted out

Disable the channel in RX_ONLY mode before reading the
last data from  RXX register to prevent the SPI slave
to transmit next word

Signed-off-by: Ajoy Kumar Das <akdas75@yahoo.in>
Cc: Tom Rini <trini@ti.com>
Cc: jacopo mondi <j.mondi@voltaelectronics.com>
2012-12-10 08:55:25 -07:00
Peter Korsgaard
22cbeed454 omap3_spi: introduce CONFIG_OMAP3_SPI_D0_D1_SWAPPED
D0/D1 Swapped or not is a board property, not anything specific to
the am33xx SoC, so add a custom define for it.

At the same time correct the bit handling for the swapped mode
(DPE0 should be cleared and SI/DPE1 set).

Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
2012-10-25 11:30:50 -07:00
Tom Rini
a4a99fffd8 am335x evm: Enable support for spi0
Signed-off-by: Tom Rini <trini@ti.com>
2012-09-01 14:58:19 +02:00
Tom Rini
4c0620bf42 am33xx: Add support, update omap3 McSPI driver
Signed-off-by: Tom Rini <trini@ti.com>
2012-09-01 14:58:18 +02:00
jacopo mondi
08b5ab073d omap3_spi: receive transmit mode
Implementation of receive-transmit mode for
omap3 MCSPI.

Introduces full duplex communication, needed by
some spi devices (such as enc28j60).

Signed-off-by: jacopo mondi <mondi@cs.unibo.it> <j.mondi@voltaelectronics.com>
2012-03-27 22:05:29 +02:00
Dirk Behme
53736baaff OMAP3: SPI driver
CC: Ruslan N. Araslanov <byaaka@yandex.ru>
Signed-off-by: Ruslan Araslanov <ruslan.araslanov@vitecmm.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-12-11 11:01:00 -05:00