Commit Graph

1331 Commits

Author SHA1 Message Date
Andy Shevchenko
daab59ac05 avr32: Retire AVR32 for good
AVR32 is gone. It's already more than two years for no support in Buildroot,
even longer there is no support in GCC (last version is heavily patched 4.2.4).

Linux kernel v4.12 got rid of it (and v4.11 didn't build successfully).

There is no good point to keep this support in U-Boot either.

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2017-07-06 16:17:19 -04:00
Heiko Schocher
98f705c9ce powerpc: remove 4xx support
There was for long time no activity in the 4xx area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in 4xx,
so remove it.

Signed-off-by: Heiko Schocher <hs@denx.de>
2017-07-03 17:35:28 -04:00
Heiko Schocher
2fa5130d46 drivers, usb, gadget: fix compiler warnings for at91_udc.c
fix warnings:
drivers/usb/gadget/at91_udc.c:1344:12: warning: 'at91rm9200_udc_init' defined but not used [-Wunused-function]
drivers/usb/gadget/at91_udc.c:1379:13: warning: 'at91rm9200_udc_pullup' defined but not used [-Wunused-function]
drivers/usb/gadget/at91_udc.c:1476:12: warning: 'at91sam9263_udc_init' defined but not used [-Wunused-function]

Signed-off-by: Heiko Schocher <hs@denx.de>
2017-06-29 10:01:11 -04:00
Lukasz Majewski
2a0583e3e8 usb: gadget: Call g_dnl_bind_fixup() before testing g_dnl_serial length
After the commit SHA1: 842778a091 - the serial number descriptor is only
visible when we have non zero length of g_dnl_serial.

However, on some platforms (e.g. Siemens) the serial number is set at
g_dnl_bind_fixup(), so with the current code we will always omit the
serial (since it is not set).

This commit moves the g_dnl_bind_fixup() call before the g_dnl_serial
length test.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Heiko Schocher <hs@denx.de>
2017-06-29 09:51:05 -04:00
Tom Rini
6188752187 at91_udc.c: Fix unused variable warning
With gcc-6 and later we see warnings that at91sam9263_udc_caps and
at91rm9200_udc_caps are unused.

Fixes: 620197670a ("usb: gadget: at91_udc: add at91_udc into U-Boot")
Cc: Lukasz Majewski <lukma@denx.de>
Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Heiko Schocher <hs@denx.de>
2017-06-18 21:11:10 +02:00
Alexey Brodkin
9000eddbae drivers/usb/ehci: Use platform-specific accessors
Current implementation doesn't allow utilization of platform-specific
reads and writes.

But some arches or platforms may want to use their accessors that do
some extra work like adding barriers for data serialization etc.

Interesting enough OHCI accessors already do that so just aligning
EHCI to it now.

This is a resend of http://patchwork.ozlabs.org/patch/726714/
Back in the day this patch broke some PPC and Sandbox boards
as they we missing inclusion of "asm/io.h". Those missing items were
fixed with:
 1) http://patchwork.ozlabs.org/patch/751397/
 2) http://patchwork.ozlabs.org/patch/771099/

So now it should be safe to apply this patch.
FWIW TravisCI builds everything with all 3 patches in place,
see https://travis-ci.org/abrodkin/u-boot/builds/239563813

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
2017-06-17 17:59:03 +02:00
Meng Dongyang
c65a34942e usb: dwc2: force to host mode if not support HNP/SRP
In current code, after running the command of "usb start", the controller
will keep in otg mode and can't switch to host mode if not support
SNP/SRP capability. So add the property of "hnp-srp-disable" in the DTS
to config the contrller work in force mode of host.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
2017-06-17 17:59:03 +02:00
Heiko Schocher
064b55cfcb powerpc, 5xxx, 512x: remove support for mpc5xxx and mpc512x
There was for long time no activity in the mpx5xxx area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in mpc5xxx,
so remove it.

Signed-off-by: Heiko Schocher <hs@denx.de>
2017-06-16 10:14:55 -04:00
Heiko Schocher
2eb48ff7a2 powerpc, 8260: remove support for mpc8260
There was for long time no activity in the 8260 area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in 8260,
so remove it.

Signed-off-by: Heiko Schocher <hs@denx.de>
2017-06-12 08:38:02 -04:00
Heiko Schocher
5b8e76c35e powerpc, 8xx: remove support for 8xx
There was for long time no activity in the 8xx area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in 8xx,
so remove it (with a heavy heart, knowing that I remove
here the root of U-Boot).

Signed-off-by: Heiko Schocher <hs@denx.de>
2017-06-12 08:37:55 -04:00
Meng Dongyang
d3cb14b910 rockchip: usb: host: xhci-rockchip: add support for rk3328
Add the compatible "rockchip,rk3328-xhci" in match table
for rk3328 to probe xhci controller. Use fixed regulator
to control the voltage of vbus and turn off vbus when
usb stop.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2017-06-07 07:29:25 -06:00
Tom Rini
b9eaeae19e Merge git://git.denx.de/u-boot-usb 2017-06-05 21:05:51 -04:00
Simon Glass
457e51cffd common: arm: freescale: layerscape: Move header files out of common.h
We should not have an arch-specific header file in common.h. Adjust the
board files a little so it is not needed, and drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-05 14:12:59 -04:00
Simon Glass
6e2941d787 common: freescale: Move arch-specific declarations
The declarations should not be in common.h. Move them to the arch-specific
headers.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Fixup thinko defined(FSL_LSCH3) -> defined(CONFIG_FSL_LSCH3)]
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-06-05 12:30:55 -04:00
Simon Glass
c62db35d52 arm: Add explicit include of <asm/mach-types.h>
Rather than relying on common.h to provide this include, which is going
away at some point, include it explicitly in each file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2017-06-05 11:02:36 -04:00
Simon Glass
5a8ba315f1 samsung: Drop more references fo s3c24x0
This is dead code now. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-05 11:02:31 -04:00
Simon Glass
7a7530afb8 samsung: usb: Drop ohci-s3c24xx driver
This is not used anymore. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-05 11:02:30 -04:00
Alexey Brodkin
2cb7b900f4 ehci-pci: Prepare for usage of readl()/writel() accessors
We used to have opencoded ehci_readl()/writel() which required no
external functions to be called.

Now with attempt to switch to generic readl()/writel() accessors
we see a missing declaration of those accessors in ehci-ppc4xx.
Something like that happens if applied
http://patchwork.ozlabs.org/patch/726714/:
--------------------------------->8---------------------------
  CC      drivers/usb/host/ehci-pci.o
In file included from drivers/usb/host/ehci-pci.c:14:0:
drivers/usb/host/ehci-pci.c: In function 'ehci_pci_init':
drivers/usb/host/ehci.h:108:36: warning: implicit declaration of function 'readl' [-Wimplicit-function-declaration]
 #define ehci_readl(x)  cpu_to_le32(readl(x))
                                    ^
drivers/usb/host/ehci.h:23:26: note: in definition of macro 'HC_LENGTH'
 #define HC_LENGTH(p)  (((p) >> 0) & 0x00ff)
                          ^
include/linux/byteorder/generic.h:89:21: note: in expansion of macro '__cpu_to_le32'
 #define cpu_to_le32 __cpu_to_le32
                     ^~~~~~~~~~~~~
drivers/usb/host/ehci-pci.c:33:14: note: in expansion of macro 'ehci_readl'
    HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
              ^~~~~~~~~~
--------------------------------->8---------------------------

This the same fix as we have for "ehci-ppc4xx" in
83cb46c286 "ehci-ppc4xx: Prepare for usage of readl()/writel() accessors".

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefan Roese <sr@denx.de>
2017-06-05 13:42:09 +02:00
Simon Glass
a1e4adee99 sandbox: usb: Convert emulators to livetree
Update the sandbox flash and hub USB emulators to support a live device
tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:13 -06:00
Simon Glass
d20fd27d8f dm: usb: Convert uclass to livetree
Update the usb uclass to support a live device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:13 -06:00
Simon Glass
150c5afe5b dm: gpio: Add live tree support
Add support for requesting GPIOs with a live device tree.

This involves adjusting the function signature for the legacy function
gpio_request_by_name_nodev(), so fix up all callers.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes to stm32f746-disco.c:
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-06-01 07:03:10 -06:00
Simon Glass
45a26867e8 dm: core: Update device_bind_driver_to_node() to use ofnode
Adjust this function to us an ofnode instead of an offset, so it can be
used with livetree. This involves updating all callers.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:08 -06:00
Simon Glass
911f3aef35 dm: core: Rename of_device_is_compatible()
The of_ prefix conflicts with the livetree version of this function.
Rename it to avoid problems when we add livetree support.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:06 -06:00
Simon Glass
a821c4af79 dm: Rename dev_addr..() functions
These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing functions to avoid confusion.

In the end we will have:

   1. dev_read_addr...()    - works on devices, supports flat/live tree
   2. devfdt_get_addr...()  - current functions, flat tree only
   3. of_get_address() etc. - new functions, live tree only

All drivers will be written to use 1. That function will in turn call
either 2 or 3 depending on whether the flat or live tree is in use.

Note this involves changing some dead code - the imx_lpi2c.c file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:01 -06:00
Simon Glass
9d922450aa dm: Use dm.h header when driver mode is used
This header includes things that are needed to make driver build. Adjust
existing users to include that always, even if other dm/ includes are
present

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 06:57:52 -06:00
Tom Rini
380e86f361 Merge git://git.denx.de/u-boot-fsl-qoriq 2017-05-26 11:19:27 -04:00
Priyanka Jain
3049a583f3 armv8: ls2080ardb: Add LS2081ARDB board support
LS2081ARDB board is similar to LS2080ARDB board with few differences
 It hosts LS2081A SoC
 Default boot source is QSPI-boot
 It does not have IFC interface
 RTC and QSPI flash device are different
 It provides QIXIS access via I2C

Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: Santan Kumar <santan.kumar@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
2017-05-23 09:47:08 -07:00
Hiroyuki Yokoyama
3426b2038c usb: ehci: Add Renesas RCar M3/H3 EHCI support
Add a USB controller driver for the EHCI block in R8A7795/R8A7796 SoC.
This is a stopgap measure until we have proper DT support, clock and
reset framework in place, at which point we can switch to ehci-generic.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Reviewed-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2017-05-22 11:47:27 +02:00
Uri Mashiach
3ce3026a09 net: usb: mcs7830: fix non-DM ingress path
The mcs7830_recv() (non-DM) function discards good packets and tries to
process "bad" packets due to incorrect test condition.
Fix the condition and return the proper value as described in function
doc.

Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
2017-05-21 16:44:04 +02:00
Liam Beguin
9ad69f0ba4 usb: lpc32xx: add i2c DM support
Add DM support for i2c functions.

Signed-off-by: Liam Beguin <lbeguin@tycoint.com>
Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2017-05-18 11:31:56 +02:00
Tom Rini
1d1ab61c32 Kconfig: OMAP: USB: Migrate CONFIG_USB_EHCI_OMAP to Kconfig
Follow the exiting logic for the i.MX options when migrating this
option.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2017-05-15 13:00:26 -04:00
Tom Rini
80f1f3204a Kconfig: USB: Migrate existing USB_EHCI_xxx options
The following options are migrated over fully now:
- USB_EHCI_ATMEL
- USB_EHCI_MARVELL
- USB_EHCI_MX6
- USB_EHCI_MX7
- USB_EHCI_MSM
- USB_EHCI_ZYNQ
- USB_EHCI_GENERIC

This also requires fixing the depends on USB_EHCI_MARVELL as it's used
by Orion5X and Kirkwood as well.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2017-05-15 13:00:26 -04:00
Tom Rini
64d6ac5bc4 Kconfig: USB: Migrate CONFIG_USB_EHCI_HCD users to Kconfig
Migrate the rest of the users of CONFIG_USB_EHCI_HCD over to Kconfig.
For a few SoCs, imply or default y this if USB is enabled.  In some
cases we had not already migrated to CONFIG_USB so do that as well.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2017-05-15 13:00:21 -04:00
Tom Rini
8850c5d57c Kconfig: USB: Migrate CONFIG_USB_EHCI to CONFIG_USB_EHCI_HCD
In order to be able to migrate the various SoC EHCI CONFIG options we
first need to finish the switch from CONFIG_USB_EHCI to
CONFIG_USB_EHCI_HCD.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2017-05-15 10:40:05 -04:00
Tom Rini
77777f769f omap4: Drop redundant CONFIG_OMAP4430 symbol
While there are a few different OMAP4 SoCs, today we always set
CONFIG_OMAP4430 and CONFIG_OMAP44XX.  Convert the few test of
CONFIG_OMAP4430 to CONFIG_OMAP44XX.

Cc: Marek Vasut <marex@denx.de>
Cc: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-05-15 10:39:59 -04:00
Tom Rini
864896be3b omap3: Drop CONFIG_OMAP3_EVM, switch to CONFIG_TARGET_OMAP3_EVM when needed
We make use of CONFIG_OMAP3_EVM today to know when to do a specific
tweak in MUSB.  This can be tested on via CONFIG_TARGET_OMAP3_EVM
instead, so switch there so we can drop the now unused symbol
CONFIG_OMAP3_EVM.  In investigating what to do about the symbol usage we
see that the cairo board defines the same function, but never called it
(as it does not define CONFIG_OMAP3_EVM) and was just returning anyhow,
so drop that function from that board.

Cc: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr>
Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
2017-05-15 10:39:58 -04:00
nicolas.le.bayon@st.com
b1f2a17c78 usb: gadget: avoid variable name clipping in cb_getvar
Hi,

A kind reminder to look at this patch (already reviewed by Marek and acked by Lukasz), and if possible to put it in the next pull list, or the one after is timing is too short.

Thanks in advance for your time

Best Regards
Nicolas

-----Original Message-----
From: Nicolas LE BAYON
Sent: mardi 25 avril 2017 10:18
To: Nicolas LE BAYON <nicolas.le.bayon@st.com>; u-boot@lists.denx.de; lukma@denx.de; marex@denx.de
Cc: nlebayon@gmail.com; Patrice CHOTARD <patrice.chotard@st.com>; Jean-philippe ROMAIN <jean-philippe.romain@st.com>
Subject: [U-Boot][PATCH v7] usb: gadget: avoid variable name clipping in cb_getvar

From: Nicolas Le Bayon <nicolas.le.bayon@st.com>

Instead of using a fixed-size array to store variable name, preferring a dynamic allocation treats correctly all variable name lengths.
Variable names are growing through releases and features. By this way, name clipping is prevented.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Lukasz Majewski <lukma@denx.de>
2017-05-11 22:03:36 -04:00
Simon Glass
20b429b013 net: smsc95xx: Correct free_pkt() implementation
On further review this returns the wrong packet length from the driver.
It may not be noticed since protocols will take care of it. Fix it by
subtracting the header length from the packet length returned.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-05-09 20:17:24 -04:00
Uri Mashiach
4acfe1ae46 arm: am57xx: cl-som-am57x: invoke clock API to enable/disable clocks
Invoke enable_usb_clocks during board_usb_init and disable_usb_clocks
during board_usb_exit to enable and disable clocks respectively.

Modifications:
* Enable USB clocks in the OMAP version of the function
  board_usb_init.
* Disable USB clocks in the OMAP version of the function
  board_usb_cleanup.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2017-05-08 11:38:38 -04:00
Uri Mashiach
1a9a5f7a39 usb: host: xhci-omap: fix double weak board_usb_init functions
A weak version of the function board_usb_init is implemented in:
common/usb.c
drivers/usb/host/xhci-omap.c

To fix the double implementations:
* Convert the board_usb_init function in drivers/usb/host/xhci-omap.c
  normal (not weak).
* The function board_usb_init in drivers/usb/host/xhci-omap.c calls to
  the weak function omap_xhci_board_usb_init.
* Rename board version of the function board_usb_init to
  omap_xhci_board_usb_init.
  Done only for boards that defines CONFIG_USB_XHCI_OMAP.

To achieve the same flexibility with the function board_usb_cleanup:
* Add a normal (not weak) implementation of the function
  board_usb_cleanup in drivers/usb/host/xhci-omap.c
* The function board_usb_cleanup in drivers/usb/host/xhci-omap.c calls
  to the weak function omap_xhci_board_usb_cleanup.
* Rename board version of the function board_usb_cleanup to
  omap_xhci_board_usb_cleanup.
  Done only for boards that defines CONFIG_USB_XHCI_OMAP.

Cc: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
2017-05-08 11:38:37 -04:00
Uri Mashiach
ef3f3b8100 arm: usb: dra7xx: xHCI registers based on USB port index
Modify the determination of the base address of xHCI registers of DRA7XX
targets.
Before the commit: by the target.
After the commit: by the USB port index.

Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
2017-05-08 11:38:36 -04:00
Alexey Brodkin
83cb46c286 ehci-ppc4xx: Prepare for usage of readl()/writel() accessors
We used to have opencoded ehci_readl()/writel() which required no
external functions to be called.

Now with attempt to switch to generic readl()/writel() accessors
we see a missing declaration of those accessors in ehci-ppc4xx.
Something like that happens if applied
http://patchwork.ozlabs.org/patch/726714/:
---------------->8---------------
  CC      drivers/usb/host/ehci-ppc4xx.o
drivers/usb/host/ehci-ppc4xx.c: In function 'ehci_hcd_init':
drivers/usb/host/ehci-ppc4xx.c:23:3: warning: implicit declaration of function 'readl' [-Wimplicit-function-declaration]
   HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
   ^
---------------->8---------------

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Stefan Roese <sr@denx.de>
Reviewed-by: Stefan Roese <sr@denx.de>
2017-04-25 12:50:13 +02:00
Heinrich Schuchardt
7f2e59aee5 usb: musb: avoid out of bound access in udc_setup_ep
For id = 15 an out of bound access occurs in udc_setup_ep().
Increase the size of epinfo[] from 30 to 32 to encompass
ids 0..15.

The problem was highlighted by cppcheck.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2017-04-25 12:50:12 +02:00
Heinrich Schuchardt
2511b2ed4d musb: properly detect failed initialization of controller
We want to check the result of musb_init_controller
and not the address were the result is stored.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2017-04-25 12:50:11 +02:00
York Sun
73fb583829 armv7: ls1021a: Drop macro CONFIG_LS102XA
Use CONFIG_ARCH_LS1021A instead.

Signed-off-by: York Sun <york.sun@nxp.com>
2017-04-17 09:03:30 -07:00
Eddie Cai
57ca63b86e usb: dwc2: invalidate the dcache before starting the DMA
We should invalidate the dcache before starting the DMA. In case there are
any dirty lines from the DMA buffer in the cache, subsequent cache-line
replacements may corrupt the buffer in memory while the DMA is still going on.
Cache-line replacement can happen if the CPU tries to bring some other memory
locations into the cache while the DMA is going on.

Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Reviewed-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
2017-04-14 16:44:16 +02:00
Philipp Tomsich
889239d6b5 usb: dwc3: gadget: make cache-maintenance on event buffers more robust
Merely using dma_alloc_coherent does not ensure that there is no stale
data left in the caches for the allocated DMA buffer (i.e. that the
affected cacheline may still be dirty).

The original code was doing the following (on AArch64, which
translates a 'flush' into a 'clean + invalidate'):
  # during initialisation:
      1. allocate buffers via memalign
      	 => buffers may still be modified (cached, dirty)
  # during interrupt processing
      2. clean + invalidate buffers
      	 => may commit stale data from a modified cacheline
      3. read from buffers

This could lead to garbage info being written to buffers before
reading them during even-processing.

To make the event processing more robust, we use the following sequence
for the cache-maintenance:
  # during initialisation:
      1. allocate buffers via memalign
      2. clean + invalidate buffers
      	 (we only need the 'invalidate' part, but dwc3_flush_cache()
	  always performs a 'clean + invalidate')
  # during interrupt processing
      3. read the buffers
      	 (we know these lines are not cached, due to the previous
	  invalidation and no other code touching them in-between)
      4. clean + invalidate buffers
      	 => writes back any modification we may have made during event
	    processing and ensures that the lines are not in the cache
	    the next time we enter interrupt processing

Note that with the original sequence, we observe reproducible
(depending on the cache state: i.e. running dhcp/usb start before will
upset caches to get us around this) issues in the event processing (a
fatal synchronous abort in dwc3_gadget_uboot_handle_interrupt on the
first time interrupt handling is invoked) when running USB mass
storage emulation on our RK3399-Q7 with data-caches on.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2017-04-14 16:44:16 +02:00
Philipp Tomsich
b7bf4a9592 usb: dwc3: ensure consistent types for dwc3_flush_cache
The dwc3_flush_cache() call was declared and used inconsistently:
 * The declaration assumed 'int' for addresses (a potential issue
   when running in a LP64 memory model).
 * The invocation cast the address to 'long'.

This change ensures that both the declaration and usage of this
function consistently uses 'uintptr_t' for correct behaviour even
when the allocated buffers (to be flushed) reside outside of the
lower 32bits of memory.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2017-04-14 16:44:16 +02:00
Felipe Balbi
207835b13f usb: gadget: g_dnl: don't set iProduct nor iSerialNumber
Both these numbers are calculated in runtime and dynamically assigned
to the device descriptor during bind().

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-04-14 16:44:16 +02:00
Felipe Balbi
842778a091 usb: gadget: g_dnl: only set iSerialNumber if we have a serial#
We don't want to claim that we support a serial number string and
later return nothing. Because of that, if g_dnl_serial is an empty
string, let's skip setting iSerialNumber to a valid number.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-04-14 16:44:16 +02:00