* Re: [PATCH v2 5/6] gpio-exar/8250-exar: Make set of exported GPIOs configurable
From: Jan Kiszka @ 2017-05-22 17:04 UTC (permalink / raw)
To: Andy Shevchenko
Cc: Greg Kroah-Hartman, Linus Walleij, Alexandre Courbot,
Linux Kernel Mailing List, linux-serial@vger.kernel.org,
linux-gpio@vger.kernel.org, Sudip Mukherjee, Sascha Weisenberger
In-Reply-To: <CAHp75VeWqxHD7eS5FZGoyYw1B4QGMaWzVUtY-0akC764qjCjng@mail.gmail.com>
On 2017-05-22 18:33, Andy Shevchenko wrote:
> On Sun, May 21, 2017 at 2:43 PM, Jan Kiszka <jan.kiszka@siemens.com> wrote:
>> On 2017-05-18 19:43, Andy Shevchenko wrote:
>>> On Thu, May 18, 2017 at 5:59 PM, Jan Kiszka <jan.kiszka@siemens.com> wrote:
>>>> On the SIMATIC, IOT2040 only a single pin is exportable as GPIO, the
>
>>>> + pdata.first_gpio = first_gpio;
>>>> + pdata.ngpio = ngpio;
>>>
>>> Still thinking about device properties ("ngpios" and something like
>>> "exar8250,gpio-start").
>>
>> Changed back to properties, removing all platform data.
>>
>> But what's the purpose of prefixing the name here? This does not have
>> anything to do with device trees. It's a private parameter channel
>> between the creating device driver and the gpio driver, and there will
>> be no other bindings.
>
> To avoid potential collision with registered official property, that's
> why better to use prefix.
> (I didn't find anything like GPIO start / pin in registered
> properties, maybe there is one)
When using the "public" channel devices properties, we cannot prevent
that people set some for the device, despite it is not supposed to be
controlled by DT or ACPI. But I don't see where default properties
should come from, except via intentionally designed DTs or ACPI tables.
Anyway, I can prefix.
>
>>>> + unsigned int first_gpio;
>>>> + unsigned int ngpio;
>>>
>>> u16 ?
>
>> If we do that, then we would rather have to choose u8. But this is
>> pointless restriction. I prefer to stay with the native type.
>
> Still for properties it would be u32, wouldn't it?
>
Because properties ask for a type width, yes. I can align both to u32,
though.
Jan
^ permalink raw reply
* Re: gpio-exar: Why filtering out Commtech devices?
From: Jan Kiszka @ 2017-05-22 18:18 UTC (permalink / raw)
To: Technical Support
Cc: Sudip Mukherjee, Linux Kernel Mailing List, linux-serial,
linux-gpio
In-Reply-To: <b725379e-fc67-d706-e172-ca585c3f5e3d@siemens.com>
On 2017-05-22 18:24, Jan Kiszka wrote:
> On 2017-05-22 17:17, Technical Support wrote:
>> Hello,
>>
>> The Exar MPIO pins are used by our device driver to control features of
>> the line driver and can't be used as GPIO pins. I agree, the condition
>> can be moved to 8250_exar prior to a platform device being created for
>> the gpio_exar driver.
>>
>
> Thanks a lot for the feedback! I will send a refactoring patch.
Hmm, are you possibly talking about PCI device with the IDs 0x2, 0x4,
0xa, 0xb (4222PCI335, 4224PCI335, 2324PCI335, 2328PCI335), because those
actually set the GPIOs for apparent internal reasons. However,
0x20..0x22 (4222PCIE, 4224PCIE, 4228PCIE) already share setup_gpio() via
pci_xr17v35x_setup(), and that looks different.
I'm also asking again because we just changed the default MPIO settings
for the latter to all inputs. If you depended on them to be all outputs
and 0, we may have broken something.
Thanks,
Jan
--
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux
^ permalink raw reply
* Re: [PATCH 1/1] xilinx ps uart: Adding a kernel parameter for the number of xilinx ps uarts
From: Alan Cox @ 2017-05-22 18:26 UTC (permalink / raw)
To: Michal Simek
Cc: gregkh, linux-kernel, Sam Povilus, soren.brinkmann, linux-serial,
jslaby, linux-arm-kernel
In-Reply-To: <517d864d-d230-3abc-eb3c-4b628dc4625f@xilinx.com>
> We have in soc vendor tree similar patch but the reason is different.
>
> tty: serial: Added a CONFIG_SERIAL_XILINX_NR_UARTS option.
>
> This patch Adds CONFIG_SERIAL_XILINX_NR_UARTS option to allow
> the user to provide the Max number of uart ports information.
> If multiple cards (or) PL UARTS are present, the default limit
> of 2 ports should be increased.
>
> I haven't checked all drivers but in our case we have added this as
> quick fix for scenarios where you use serial aliases where alias is
> pointed to serial2 or more.
> In cdns_uart_init() cdns_uart_uart_driver is passed which contains .nr
> which is required to be passed.
>
> What's the best driver to look at dynamic allocation?
So there are quite a few that dynamically allocate the objects as they
are enumerated (eg max3100), but have a maximum set that is just pointers
(so for the max number of ports cheaper than the dynamic code)
The other question is why is it a CONFIG_ option. I'm assuming these
platforms are all ARM and in that case you could just pass the value in
the device tree, or hard code a safe maximum number of pointers to a
value which is the worst case and then install them as they are
enumerated.
There are lots of options better than breaking the "one kernel many
platforms" model.
Alan
^ permalink raw reply
* Re: [V2, 2/6] tty: serial: lpuart: add little endian 32 bit register support
From: Nikita Yushchenko @ 2017-05-23 5:24 UTC (permalink / raw)
To: Dong Aisheng
Cc: A.S. Dong, linux-serial@vger.kernel.org, Andy Duan,
gregkh@linuxfoundation.org, Y.B. Lu, linux-kernel@vger.kernel.org,
stefan@agner.ch, Mingkai Hu, jslaby@suse.com,
linux-arm-kernel@lists.infradead.org
In-Reply-To: <20170519150722.GB23227@b29396-OptiPlex-7040>
Hi,
>>>> Alternative solution could be - have separate write path for earlycon.
>>>
>>> It looks to me having the same issue with a separate write patch
>>> for earlycon as we still need distinguish Little or Big endian
>>> for Layerscape and IMX.
>>>
>>>> At a glance, it is dozen lines of code.
>>>
>>> Would you please show some sample code?
>>
>> Do not reuse lpuart32_console_putchar() in earlycon code.
>>
>> Have two sets of early_setup/early_write/putchar - for BE and
>> defaut-endian earlycon. And in these putchar's do not use
>> lpuart_(read|write).
>>
>
> Isn't that introducing another consistency break after fix one
> consistency break?
>
> If doing that, we then have two register read/write APIs.
> One for normal driver operation by dynamically checking lpuart_is_be
> property to distinguish the endian difference problem.
> Another is specifically implemented for only early console read/write
> and use hardcoded way to read/write register directly instead of using
> the standard API lpuart32_read/write, like follows:
> e.g.
> lpuart32_le_console_write() {
> writel();
> }
>
> lpuart32_be_console_write() {
> iowrite32be()
> }
> This also makes the driver a bit strange and ugly.
>
> It looks to me both way are trade offs and the later one seems sacrifice
> more. And i doubt if it's really necessary for probably a no real gain
> purpose as the FPGA you mentioned is a theoretical case and less
> possibility to exist.
>
> I'm still wondering how about keep using the exist way and adding more
> information in code to explain why use a global var?
I've checked other driver under drivers/tty/serial/, for examples of
similar cases.
Please look at serial8250_early_in() / serial8250_early_out() ?
These do handle different endian, via port->iotype
Another example is drivers/tty/serial/samsung.c, where
port->private_data is initialized and used.
Nikita
^ permalink raw reply
* Re: [PATCH v3 0/4] tty/serial: meson_uart: add support for core clock handling
From: Neil Armstrong @ 2017-05-23 8:37 UTC (permalink / raw)
To: Helmut Klein
Cc: devicetree, linux-kernel, linux-serial, linux-amlogic, linux-clk,
linux-arm-kernel
In-Reply-To: <20170331165437.26227-1-hgkr.klein@gmail.com>
Hi Helmut,
On 03/31/2017 06:54 PM, Helmut Klein wrote:
> To be able to use the three none AO uarts of the meson gx SoCs (uart_A,
> uart_B & uart_C), the core clock has to be enabled (see chapter 22.3 of
> the public s905 data sheet).
> At least the u-boot of my s905 based media player (netxeon minimx-g)
> doesn't do this. so the driver must enable the clock.
>
> This patch set does:
> - exposes the UART clock ids to the dtb
> - adds documentation for the dt-bindings of meson_uart
> - adds the core clock handling to the driver
> - adds the core clock handling to meson-gxbb.dtsi and meson-gxl.dtsi
>
> The patchset is based on the branch "master" of the repository in [1]
>
> Changes since v2
> - mail subjects reworked
> - add clocks/clock-names to the documentation
> - add core clock handling to meson-gxbb.dtsi & meson-gxl.dtsi
>
> Changes since v1
> - use git to produce the patch set
> - added the clock ids for uart_B and uart_C
>
> [1] git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic.git
I'll take the first patch then I will need to rework your patchset (keeping your
autorship, don't worry) since we need to handle the old bindings.
I'll post it for review when ready.
Anyway, thanks for the patchset.
Neil
>
> Helmut Klein (4):
> clk: meson: gxbb: expose CLKID_UARTx
> dt-bindings: meson_uart: add documentation for meson UARTs
> tty/serial: meson_uart: add the core clock handling to the driver
> ARM64: dts: meson-gx: add core clock support for uart_A, uart_B and
> uart_C
>
> .../bindings/serial/amlogic,meson_uart.txt | 30 ++++++++++++++++++++++
> arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 15 +++++++++++
> arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 15 +++++++++++
> drivers/clk/meson/gxbb.h | 6 ++---
> drivers/tty/serial/meson_uart.c | 10 ++++++++
> include/dt-bindings/clock/gxbb-clkc.h | 3 +++
> 6 files changed, 76 insertions(+), 3 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt
>
> --
> 2.11.0
>
>
> _______________________________________________
> linux-amlogic mailing list
> linux-amlogic@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-amlogic
>
^ permalink raw reply
* Re: [PATCH 1/1] xilinx ps uart: Adding a kernel parameter for the number of xilinx ps uarts
From: Michal Simek @ 2017-05-23 11:44 UTC (permalink / raw)
To: Alan Cox, Michal Simek, Rob Herring
Cc: Sam Povilus, gregkh, jslaby, soren.brinkmann, linux-serial,
linux-arm-kernel, linux-kernel
In-Reply-To: <20170522192636.5b578d89@alans-desktop>
On 22.5.2017 20:26, Alan Cox wrote:
>> We have in soc vendor tree similar patch but the reason is different.
>>
>> tty: serial: Added a CONFIG_SERIAL_XILINX_NR_UARTS option.
>>
>> This patch Adds CONFIG_SERIAL_XILINX_NR_UARTS option to allow
>> the user to provide the Max number of uart ports information.
>> If multiple cards (or) PL UARTS are present, the default limit
>> of 2 ports should be increased.
>>
>> I haven't checked all drivers but in our case we have added this as
>> quick fix for scenarios where you use serial aliases where alias is
>> pointed to serial2 or more.
>> In cdns_uart_init() cdns_uart_uart_driver is passed which contains .nr
>> which is required to be passed.
>>
>> What's the best driver to look at dynamic allocation?
>
> So there are quite a few that dynamically allocate the objects as they
> are enumerated (eg max3100), but have a maximum set that is just pointers
> (so for the max number of ports cheaper than the dynamic code)
yep hardcoded max 4 where in probe first free space is found and used
(range 0-3) but still max3100s statically allocated.
Shouldn't be this also dynamically allocated?
> The other question is why is it a CONFIG_ option. I'm assuming these
> platforms are all ARM and in that case you could just pass the value in
> the device tree, or hard code a safe maximum number of pointers to a
> value which is the worst case and then install them as they are
> enumerated.
I am not quite sure how exactly you want to do this via DT.
Also what do you think is a safe maximum number? This is fpga - hundreds
of pins which can do just uart.
> There are lots of options better than breaking the "one kernel many
> platforms" model.
Another options is also module parameter and dynamically allocated array
in cdns_uart_init.
Thanks,
Michal
^ permalink raw reply
* [PATCH V1] serial: imx: revert setup DCEDTE early and ensure DCD and RI irqs to be off
From: Steve Twiss @ 2017-05-23 12:17 UTC (permalink / raw)
To: Greg Kroah-Hartman, Jiri Slaby, LINUX-KERNEL, LINUX-SERIAL,
Lucas Stach, Uwe Kleine-Konig
Cc: Support Opensource
From: Steve Twiss <stwiss.opensource@diasemi.com>
Revert the commit e61c38d85b7392e ("serial: imx: setup DCEDTE early and
ensure DCD and RI irqs to be off")
The patch submitted to setup DCEDTE early and ensure DCD and RI irqs to
be off, causes a serial console display problem the i.MX6Q SABRESD board.
The console becomes unreadable and unwritable.
Tested-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
---
This patch applies against linux-next and v4.12-rc2
Hi,
I have been seeing a problem with the serial output console on the i.MX6Q
SABRESD, but not the i.MX6DL SABRESD. Everything was fine up to
linux-mainline/v4.11 but changed after linux-next/next-20170501.
Some bisection has pointed at the commit
e61c38d85b7392e033ee03bca46f1d6006156175 which, once removed from my
linux-next/v4.12-rc2 build allows the i.MX6Q board to display the console
correctly again.
This patch removes the original commit e61c38d85b7392e ("serial: imx:
setup DCEDTE early and ensure DCD and RI irqs to be off") from linux-next
v4.12-rc2 and fixes the serial problem seen in the i.MX6Q SABRESD board.
Regards,
Steve Twiss, Dialog Semiconductor Ltd.
drivers/tty/serial/imx.c | 36 +++++++++++++-----------------------
1 file changed, 13 insertions(+), 23 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 33509b4..b4340b5 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1325,10 +1325,19 @@ static int imx_startup(struct uart_port *port)
if (!is_imx1_uart(sport)) {
temp = readl(sport->port.membase + UCR3);
- temp |= UCR3_DTRDEN | UCR3_RI | UCR3_DCD;
+ /*
+ * The effect of RI and DCD differs depending on the UFCR_DCEDTE
+ * bit. In DCE mode they control the outputs, in DTE mode they
+ * enable the respective irqs. At least the DCD irq cannot be
+ * cleared on i.MX25 at least, so it's not usable and must be
+ * disabled. I don't have test hardware to check if RI has the
+ * same problem but I consider this likely so it's disabled for
+ * now, too.
+ */
+ temp |= IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP |
+ UCR3_DTRDEN | UCR3_RI | UCR3_DCD;
if (sport->dte_mode)
- /* disable broken interrupts */
temp &= ~(UCR3_RI | UCR3_DCD);
writel(temp, sport->port.membase + UCR3);
@@ -1610,6 +1619,8 @@ static void imx_flush_buffer(struct uart_port *port)
ufcr = readl(sport->port.membase + UFCR);
ufcr = (ufcr & (~UFCR_RFDIV)) | UFCR_RFDIV_REG(div);
+ if (sport->dte_mode)
+ ufcr |= UFCR_DCEDTE;
writel(ufcr, sport->port.membase + UFCR);
writel(num, sport->port.membase + UBIR);
@@ -2177,27 +2188,6 @@ static int serial_imx_probe(struct platform_device *pdev)
UCR1_TXMPTYEN | UCR1_RTSDEN);
writel_relaxed(reg, sport->port.membase + UCR1);
- if (!is_imx1_uart(sport) && sport->dte_mode) {
- /*
- * The DCEDTE bit changes the direction of DSR, DCD, DTR and RI
- * and influences if UCR3_RI and UCR3_DCD changes the level of RI
- * and DCD (when they are outputs) or enables the respective
- * irqs. So set this bit early, i.e. before requesting irqs.
- */
- writel(UFCR_DCEDTE, sport->port.membase + UFCR);
-
- /*
- * Disable UCR3_RI and UCR3_DCD irqs. They are also not
- * enabled later because they cannot be cleared
- * (confirmed on i.MX25) which makes them unusable.
- */
- writel(IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP | UCR3_DSR,
- sport->port.membase + UCR3);
-
- } else {
- writel(0, sport->port.membase + UFCR);
- }
-
clk_disable_unprepare(sport->clk_ipg);
/*
--
end-of-patch for PATCH V1
^ permalink raw reply related
* [PATCH v6 net-next 00/17] net: qualcomm: add QCA7000 UART driver
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
The Qualcomm QCA7000 HomePlug GreenPHY supports two interfaces:
UART and SPI. This patch series adds the missing support for UART.
This driver based on the Qualcomm code [1], but contains some changes:
* use random MAC address per default
* use net_device_stats from device
* share frame decoding between SPI and UART driver
* improve error handling
* reimplement tty_wakeup with work queue (based on slcan)
* use new serial device bus instead of ldisc
The patches 1 - 3 are just for clean up and are not related to
the UART support. Patch 4 adds SET_NETDEV_DEV() to qca_spi.
Patches 5 - 16 prepare the existing QCA7000 code for UART support.
The last patch contains the new driver.
The code itself has been tested on a Freescale i.MX28 board and
a Raspberry Pi Zero.
Changes in v6:
* rebase to current linux-next
* use SET_NETDEV_DEV() for qca_spi and qca_uart
* rename binding to qca,qca7000.txt
* use qca,qca7000 compatible for both driver
* handle error cases in qca_uart_probe properly
* fix skb leak in error path of qcauart_netdev_init
* use dev_kfree_skb_any instead of kfree_skb
* take care of tx_work on close / remove
* use devm_kmalloc for tx buffer
* minor cleanups
Changes in v5:
* rebase to current linux-next
* fix alignment issues in rx path
* fix buffer overrun with big ethernet frames
* fix init of UART decoding fsm
* add device UART settings to Kconfig help
* add current-speed to slave-device binding
* merge SPI and UART binding document
* rename qca_common to qca_7k_common
* drop patch for retrieving UART settings
* several cleanups
Changes in v4:
* rebase to current linux-next
* use parameter -M for git format-patch
* change order of local variables where possible
* implement basic serdev support (without hardware flow control)
Changes in v3:
* rebase to current net-next
Changes in v2:
* fix build issue by using netif_trans_update() and dev_trans_start()
[1] - https://github.com/IoE/qca7000
Stefan Wahren (17):
net: qualcomm: remove unnecessary includes
net: qca_framing: use u16 for frame offset
net: qca_7k: Use BIT macro
net: qca_spi: Use SET_NETDEV_DEV()
net: qualcomm: use net_device_ops instead of direct call
net: qualcomm: Improve readability of length defines
net: qca_spi: remove QCASPI_MTU
net: qualcomm: move qcaspi_tx_cmd to qca_spi.c
net: qca_spi: Clarify MODULE_DESCRIPTION
net: qualcomm: rename qca_framing.c to qca_7k_common.c
net: qualcomm: prepare frame decoding for UART driver
net: qualcomm: make qca_7k_common a separate kernel module
dt-bindings: qca7000-spi: Rework binding
dt-bindings: qca7000: rename binding
dt-bindings: slave-device: add current-speed property
dt-bindings: qca7000: append UART interface to binding
net: qualcomm: add QCA7000 UART driver
.../devicetree/bindings/net/qca,qca7000.txt | 88 +++++
.../devicetree/bindings/net/qca-qca7000-spi.txt | 47 ---
.../devicetree/bindings/serial/slave-device.txt | 9 +
drivers/net/ethernet/qualcomm/Kconfig | 24 +-
drivers/net/ethernet/qualcomm/Makefile | 7 +-
drivers/net/ethernet/qualcomm/qca_7k.c | 28 --
drivers/net/ethernet/qualcomm/qca_7k.h | 15 +-
.../qualcomm/{qca_framing.c => qca_7k_common.c} | 26 +-
.../qualcomm/{qca_framing.h => qca_7k_common.h} | 24 +-
drivers/net/ethernet/qualcomm/qca_debug.c | 5 +-
drivers/net/ethernet/qualcomm/qca_spi.c | 48 ++-
drivers/net/ethernet/qualcomm/qca_spi.h | 5 +-
drivers/net/ethernet/qualcomm/qca_uart.c | 423 +++++++++++++++++++++
13 files changed, 630 insertions(+), 119 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/qca,qca7000.txt
delete mode 100644 Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
rename drivers/net/ethernet/qualcomm/{qca_framing.c => qca_7k_common.c} (85%)
rename drivers/net/ethernet/qualcomm/{qca_framing.h => qca_7k_common.h} (86%)
create mode 100644 drivers/net/ethernet/qualcomm/qca_uart.c
--
2.1.4
^ permalink raw reply
* [PATCH v6 net-next 01/17] net: qualcomm: remove unnecessary includes
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Most of the includes in qca_7k.c are unnecessary so we better remove them.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_7k.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_7k.c b/drivers/net/ethernet/qualcomm/qca_7k.c
index f0066fb..557d53c 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k.c
+++ b/drivers/net/ethernet/qualcomm/qca_7k.c
@@ -23,11 +23,7 @@
* kernel-based SPI device.
*/
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
#include <linux/spi/spi.h>
-#include <linux/version.h>
#include "qca_7k.h"
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 02/17] net: qca_framing: use u16 for frame offset
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
It doesn't make sense to use a signed variable for offset here, so
fix it up.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_framing.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_framing.h b/drivers/net/ethernet/qualcomm/qca_framing.h
index d5e795d..8b385e6 100644
--- a/drivers/net/ethernet/qualcomm/qca_framing.h
+++ b/drivers/net/ethernet/qualcomm/qca_framing.h
@@ -103,7 +103,7 @@ struct qcafrm_handle {
enum qcafrm_state state;
/* Offset in buffer (borrowed for length too) */
- s16 offset;
+ u16 offset;
/* Frame length as kept by this module */
u16 len;
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 03/17] net: qca_7k: Use BIT macro
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Use the BIT macro for the CONFIG and INT register values.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_7k.h | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_7k.h b/drivers/net/ethernet/qualcomm/qca_7k.h
index 1cad851..4047f0a 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k.h
+++ b/drivers/net/ethernet/qualcomm/qca_7k.h
@@ -54,15 +54,15 @@
#define SPI_REG_ACTION_CTRL 0x1B00
/* SPI_CONFIG register definition; */
-#define QCASPI_SLAVE_RESET_BIT (1 << 6)
+#define QCASPI_SLAVE_RESET_BIT BIT(6)
/* INTR_CAUSE/ENABLE register definition. */
-#define SPI_INT_WRBUF_BELOW_WM (1 << 10)
-#define SPI_INT_CPU_ON (1 << 6)
-#define SPI_INT_ADDR_ERR (1 << 3)
-#define SPI_INT_WRBUF_ERR (1 << 2)
-#define SPI_INT_RDBUF_ERR (1 << 1)
-#define SPI_INT_PKT_AVLBL (1 << 0)
+#define SPI_INT_WRBUF_BELOW_WM BIT(10)
+#define SPI_INT_CPU_ON BIT(6)
+#define SPI_INT_ADDR_ERR BIT(3)
+#define SPI_INT_WRBUF_ERR BIT(2)
+#define SPI_INT_RDBUF_ERR BIT(1)
+#define SPI_INT_PKT_AVLBL BIT(0)
void qcaspi_spi_error(struct qcaspi *qca);
int qcaspi_read_register(struct qcaspi *qca, u16 reg, u16 *result);
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 04/17] net: qca_spi: Use SET_NETDEV_DEV()
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Use SET_NETDEV_DEV() in qca_spi to create the "/sys/class/net/<if>/device"
symlink.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_spi.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 24ca7df..0c3fdee 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -894,6 +894,7 @@ qca_spi_probe(struct spi_device *spi)
return -ENOMEM;
qcaspi_netdev_setup(qcaspi_devs);
+ SET_NETDEV_DEV(qcaspi_devs, &spi->dev);
qca = netdev_priv(qcaspi_devs);
if (!qca) {
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 05/17] net: qualcomm: use net_device_ops instead of direct call
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
There is no need to export qcaspi_netdev_open and qcaspi_netdev_close
because they are also accessible via the net_device_ops.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_debug.c | 5 +++--
drivers/net/ethernet/qualcomm/qca_spi.c | 4 ++--
drivers/net/ethernet/qualcomm/qca_spi.h | 3 ---
3 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_debug.c b/drivers/net/ethernet/qualcomm/qca_debug.c
index d145df9..92b6be9 100644
--- a/drivers/net/ethernet/qualcomm/qca_debug.c
+++ b/drivers/net/ethernet/qualcomm/qca_debug.c
@@ -275,6 +275,7 @@ qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
static int
qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
{
+ const struct net_device_ops *ops = dev->netdev_ops;
struct qcaspi *qca = netdev_priv(dev);
if ((ring->rx_pending) ||
@@ -283,13 +284,13 @@ qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
return -EINVAL;
if (netif_running(dev))
- qcaspi_netdev_close(dev);
+ ops->ndo_stop(dev);
qca->txr.count = max_t(u32, ring->tx_pending, TX_RING_MIN_LEN);
qca->txr.count = min_t(u16, qca->txr.count, TX_RING_MAX_LEN);
if (netif_running(dev))
- qcaspi_netdev_open(dev);
+ ops->ndo_open(dev);
return 0;
}
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 0c3fdee..7e039e3 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -603,7 +603,7 @@ qcaspi_intr_handler(int irq, void *data)
return IRQ_HANDLED;
}
-int
+static int
qcaspi_netdev_open(struct net_device *dev)
{
struct qcaspi *qca = netdev_priv(dev);
@@ -640,7 +640,7 @@ qcaspi_netdev_open(struct net_device *dev)
return 0;
}
-int
+static int
qcaspi_netdev_close(struct net_device *dev)
{
struct qcaspi *qca = netdev_priv(dev);
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.h b/drivers/net/ethernet/qualcomm/qca_spi.h
index 6e31a0e..064853d 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.h
+++ b/drivers/net/ethernet/qualcomm/qca_spi.h
@@ -108,7 +108,4 @@ struct qcaspi {
u16 burst_len;
};
-int qcaspi_netdev_open(struct net_device *dev);
-int qcaspi_netdev_close(struct net_device *dev);
-
#endif /* _QCA_SPI_H */
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 06/17] net: qualcomm: Improve readability of length defines
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
In order to avoid mixing things up, make the MTU and frame length
defines easier to read.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_framing.c | 2 +-
drivers/net/ethernet/qualcomm/qca_framing.h | 8 ++++----
drivers/net/ethernet/qualcomm/qca_spi.c | 12 ++++++------
3 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_framing.c b/drivers/net/ethernet/qualcomm/qca_framing.c
index faa924c..2341f2b 100644
--- a/drivers/net/ethernet/qualcomm/qca_framing.c
+++ b/drivers/net/ethernet/qualcomm/qca_framing.c
@@ -117,7 +117,7 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
break;
case QCAFRM_WAIT_RSVD_BYTE2:
len = handle->offset;
- if (len > buf_len || len < QCAFRM_ETHMINLEN) {
+ if (len > buf_len || len < QCAFRM_MIN_LEN) {
ret = QCAFRM_INVLEN;
handle->state = QCAFRM_HW_LEN0;
} else {
diff --git a/drivers/net/ethernet/qualcomm/qca_framing.h b/drivers/net/ethernet/qualcomm/qca_framing.h
index 8b385e6..5df7c65 100644
--- a/drivers/net/ethernet/qualcomm/qca_framing.h
+++ b/drivers/net/ethernet/qualcomm/qca_framing.h
@@ -44,12 +44,12 @@
#define QCAFRM_INVFRAME (QCAFRM_ERR_BASE - 4)
/* Min/Max Ethernet MTU: 46/1500 */
-#define QCAFRM_ETHMINMTU (ETH_ZLEN - ETH_HLEN)
-#define QCAFRM_ETHMAXMTU ETH_DATA_LEN
+#define QCAFRM_MIN_MTU (ETH_ZLEN - ETH_HLEN)
+#define QCAFRM_MAX_MTU ETH_DATA_LEN
/* Min/Max frame lengths */
-#define QCAFRM_ETHMINLEN (QCAFRM_ETHMINMTU + ETH_HLEN)
-#define QCAFRM_ETHMAXLEN (QCAFRM_ETHMAXMTU + VLAN_ETH_HLEN)
+#define QCAFRM_MIN_LEN (QCAFRM_MIN_MTU + ETH_HLEN)
+#define QCAFRM_MAX_LEN (QCAFRM_MAX_MTU + VLAN_ETH_HLEN)
/* QCA7K header len */
#define QCAFRM_HEADER_LEN 8
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 7e039e3..f155548 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -69,7 +69,7 @@ static int qcaspi_pluggable = QCASPI_PLUGGABLE_MIN;
module_param(qcaspi_pluggable, int, 0);
MODULE_PARM_DESC(qcaspi_pluggable, "Pluggable SPI connection (yes/no).");
-#define QCASPI_MTU QCAFRM_ETHMAXMTU
+#define QCASPI_MTU QCAFRM_MAX_MTU
#define QCASPI_TX_TIMEOUT (1 * HZ)
#define QCASPI_QCA7K_REBOOT_TIME_MS 1000
@@ -403,7 +403,7 @@ qcaspi_tx_ring_has_space(struct tx_ring *txr)
if (txr->skb[txr->tail])
return 0;
- return (txr->size + QCAFRM_ETHMAXLEN < QCASPI_HW_BUF_LEN) ? 1 : 0;
+ return (txr->size + QCAFRM_MAX_LEN < QCASPI_HW_BUF_LEN) ? 1 : 0;
}
/* Flush the tx ring. This function is only safe to
@@ -667,8 +667,8 @@ qcaspi_netdev_xmit(struct sk_buff *skb, struct net_device *dev)
struct sk_buff *tskb;
u8 pad_len = 0;
- if (skb->len < QCAFRM_ETHMINLEN)
- pad_len = QCAFRM_ETHMINLEN - skb->len;
+ if (skb->len < QCAFRM_MIN_LEN)
+ pad_len = QCAFRM_MIN_LEN - skb->len;
if (qca->txr.skb[qca->txr.tail]) {
netdev_warn(qca->net_dev, "queue was unexpectedly full!\n");
@@ -805,8 +805,8 @@ qcaspi_netdev_setup(struct net_device *dev)
dev->tx_queue_len = 100;
/* MTU range: 46 - 1500 */
- dev->min_mtu = QCAFRM_ETHMINMTU;
- dev->max_mtu = QCAFRM_ETHMAXMTU;
+ dev->min_mtu = QCAFRM_MIN_MTU;
+ dev->max_mtu = QCAFRM_MAX_MTU;
qca = netdev_priv(dev);
memset(qca, 0, sizeof(struct qcaspi));
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 07/17] net: qca_spi: remove QCASPI_MTU
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
There is no need for an additional MTU define.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_spi.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index f155548..7464628 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -69,7 +69,6 @@ static int qcaspi_pluggable = QCASPI_PLUGGABLE_MIN;
module_param(qcaspi_pluggable, int, 0);
MODULE_PARM_DESC(qcaspi_pluggable, "Pluggable SPI connection (yes/no).");
-#define QCASPI_MTU QCAFRM_MAX_MTU
#define QCASPI_TX_TIMEOUT (1 * HZ)
#define QCASPI_QCA7K_REBOOT_TIME_MS 1000
@@ -746,7 +745,7 @@ qcaspi_netdev_init(struct net_device *dev)
{
struct qcaspi *qca = netdev_priv(dev);
- dev->mtu = QCASPI_MTU;
+ dev->mtu = QCAFRM_MAX_MTU;
dev->type = ARPHRD_ETHER;
qca->clkspeed = qcaspi_clkspeed;
qca->burst_len = qcaspi_burst_len;
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 08/17] net: qualcomm: move qcaspi_tx_cmd to qca_spi.c
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
The function qcaspi_tx_cmd() is only called from qca_spi.c. So we better
move it there.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_7k.c | 24 ------------------------
drivers/net/ethernet/qualcomm/qca_7k.h | 1 -
drivers/net/ethernet/qualcomm/qca_spi.c | 24 ++++++++++++++++++++++++
3 files changed, 24 insertions(+), 25 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_7k.c b/drivers/net/ethernet/qualcomm/qca_7k.c
index 557d53c..aa90a1d 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k.c
+++ b/drivers/net/ethernet/qualcomm/qca_7k.c
@@ -119,27 +119,3 @@ qcaspi_write_register(struct qcaspi *qca, u16 reg, u16 value)
return ret;
}
-
-int
-qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd)
-{
- __be16 tx_data;
- struct spi_message *msg = &qca->spi_msg1;
- struct spi_transfer *transfer = &qca->spi_xfer1;
- int ret;
-
- tx_data = cpu_to_be16(cmd);
- transfer->len = sizeof(tx_data);
- transfer->tx_buf = &tx_data;
- transfer->rx_buf = NULL;
-
- ret = spi_sync(qca->spi_dev, msg);
-
- if (!ret)
- ret = msg->status;
-
- if (ret)
- qcaspi_spi_error(qca);
-
- return ret;
-}
diff --git a/drivers/net/ethernet/qualcomm/qca_7k.h b/drivers/net/ethernet/qualcomm/qca_7k.h
index 4047f0a..27124c2 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k.h
+++ b/drivers/net/ethernet/qualcomm/qca_7k.h
@@ -67,6 +67,5 @@
void qcaspi_spi_error(struct qcaspi *qca);
int qcaspi_read_register(struct qcaspi *qca, u16 reg, u16 *result);
int qcaspi_write_register(struct qcaspi *qca, u16 reg, u16 value);
-int qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd);
#endif /* _QCA_7K_H */
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 7464628..50adc4f 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -192,6 +192,30 @@ qcaspi_read_legacy(struct qcaspi *qca, u8 *dst, u32 len)
}
static int
+qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd)
+{
+ __be16 tx_data;
+ struct spi_message *msg = &qca->spi_msg1;
+ struct spi_transfer *transfer = &qca->spi_xfer1;
+ int ret;
+
+ tx_data = cpu_to_be16(cmd);
+ transfer->len = sizeof(tx_data);
+ transfer->tx_buf = &tx_data;
+ transfer->rx_buf = NULL;
+
+ ret = spi_sync(qca->spi_dev, msg);
+
+ if (!ret)
+ ret = msg->status;
+
+ if (ret)
+ qcaspi_spi_error(qca);
+
+ return ret;
+}
+
+static int
qcaspi_tx_frame(struct qcaspi *qca, struct sk_buff *skb)
{
u32 count;
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 09/17] net: qca_spi: Clarify MODULE_DESCRIPTION
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Since this driver is specific to the QCA7000, we should make the module
description more precisely.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_spi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 50adc4f..ee90af3 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -999,7 +999,7 @@ static struct spi_driver qca_spi_driver = {
};
module_spi_driver(qca_spi_driver);
-MODULE_DESCRIPTION("Qualcomm Atheros SPI Driver");
+MODULE_DESCRIPTION("Qualcomm Atheros QCA7000 SPI Driver");
MODULE_AUTHOR("Qualcomm Atheros Communications");
MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
MODULE_LICENSE("Dual BSD/GPL");
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 10/17] net: qualcomm: rename qca_framing.c to qca_7k_common.c
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
As preparation for the upcoming UART driver we need a module
which contains common functions for both interfaces. The module
qca_framing is a good candidate but renaming to qca_7k_common would
make it clear.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/Makefile | 2 +-
drivers/net/ethernet/qualcomm/{qca_framing.c => qca_7k_common.c} | 2 +-
drivers/net/ethernet/qualcomm/{qca_framing.h => qca_7k_common.h} | 0
drivers/net/ethernet/qualcomm/qca_spi.c | 2 +-
drivers/net/ethernet/qualcomm/qca_spi.h | 2 +-
5 files changed, 4 insertions(+), 4 deletions(-)
rename drivers/net/ethernet/qualcomm/{qca_framing.c => qca_7k_common.c} (99%)
rename drivers/net/ethernet/qualcomm/{qca_framing.h => qca_7k_common.h} (100%)
diff --git a/drivers/net/ethernet/qualcomm/Makefile b/drivers/net/ethernet/qualcomm/Makefile
index aacb0a5..5e17bf1 100644
--- a/drivers/net/ethernet/qualcomm/Makefile
+++ b/drivers/net/ethernet/qualcomm/Makefile
@@ -3,6 +3,6 @@
#
obj-$(CONFIG_QCA7000) += qcaspi.o
-qcaspi-objs := qca_spi.o qca_framing.o qca_7k.o qca_debug.o
+qcaspi-objs := qca_spi.o qca_7k_common.o qca_7k.o qca_debug.o
obj-y += emac/
diff --git a/drivers/net/ethernet/qualcomm/qca_framing.c b/drivers/net/ethernet/qualcomm/qca_7k_common.c
similarity index 99%
rename from drivers/net/ethernet/qualcomm/qca_framing.c
rename to drivers/net/ethernet/qualcomm/qca_7k_common.c
index 2341f2b..6d17fbd 100644
--- a/drivers/net/ethernet/qualcomm/qca_framing.c
+++ b/drivers/net/ethernet/qualcomm/qca_7k_common.c
@@ -23,7 +23,7 @@
#include <linux/kernel.h>
-#include "qca_framing.h"
+#include "qca_7k_common.h"
u16
qcafrm_create_header(u8 *buf, u16 length)
diff --git a/drivers/net/ethernet/qualcomm/qca_framing.h b/drivers/net/ethernet/qualcomm/qca_7k_common.h
similarity index 100%
rename from drivers/net/ethernet/qualcomm/qca_framing.h
rename to drivers/net/ethernet/qualcomm/qca_7k_common.h
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index ee90af3..43cc7de 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -43,8 +43,8 @@
#include <linux/types.h>
#include "qca_7k.h"
+#include "qca_7k_common.h"
#include "qca_debug.h"
-#include "qca_framing.h"
#include "qca_spi.h"
#define MAX_DMA_BURST_LEN 5000
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.h b/drivers/net/ethernet/qualcomm/qca_spi.h
index 064853d..fc4beb1 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.h
+++ b/drivers/net/ethernet/qualcomm/qca_spi.h
@@ -32,7 +32,7 @@
#include <linux/spi/spi.h>
#include <linux/types.h>
-#include "qca_framing.h"
+#include "qca_7k_common.h"
#define QCASPI_DRV_VERSION "0.2.7-i"
#define QCASPI_DRV_NAME "qcaspi"
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 11/17] net: qualcomm: prepare frame decoding for UART driver
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Unfortunately the frame format is not exactly identical between SPI
and UART. In case of SPI there is an additional HW length at the
beginning. So store the initial state to make the decoding state machine
more flexible and easy to extend for UART support.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_7k_common.c | 12 ++++++------
drivers/net/ethernet/qualcomm/qca_7k_common.h | 8 ++++++--
drivers/net/ethernet/qualcomm/qca_spi.c | 2 +-
3 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/qca_7k_common.c b/drivers/net/ethernet/qualcomm/qca_7k_common.c
index 6d17fbd..0d3daa9 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k_common.c
+++ b/drivers/net/ethernet/qualcomm/qca_7k_common.c
@@ -83,7 +83,7 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
if (recv_byte != 0x00) {
/* first two bytes of length must be 0 */
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
}
break;
case QCAFRM_HW_LEN2:
@@ -97,7 +97,7 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
case QCAFRM_WAIT_AA4:
if (recv_byte != 0xAA) {
ret = QCAFRM_NOHEAD;
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
} else {
handle->state--;
}
@@ -119,7 +119,7 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
len = handle->offset;
if (len > buf_len || len < QCAFRM_MIN_LEN) {
ret = QCAFRM_INVLEN;
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
} else {
handle->state = (enum qcafrm_state)(len + 1);
/* Remaining number of bytes. */
@@ -135,7 +135,7 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
case QCAFRM_WAIT_551:
if (recv_byte != 0x55) {
ret = QCAFRM_NOTAIL;
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
} else {
handle->state = QCAFRM_WAIT_552;
}
@@ -143,11 +143,11 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
case QCAFRM_WAIT_552:
if (recv_byte != 0x55) {
ret = QCAFRM_NOTAIL;
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
} else {
ret = handle->offset;
/* Frame is fully received. */
- handle->state = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
}
break;
}
diff --git a/drivers/net/ethernet/qualcomm/qca_7k_common.h b/drivers/net/ethernet/qualcomm/qca_7k_common.h
index 5df7c65..07bdd6c 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k_common.h
+++ b/drivers/net/ethernet/qualcomm/qca_7k_common.h
@@ -61,6 +61,7 @@
#define QCAFRM_ERR_BASE -1000
enum qcafrm_state {
+ /* HW length is only available on SPI */
QCAFRM_HW_LEN0 = 0x8000,
QCAFRM_HW_LEN1 = QCAFRM_HW_LEN0 - 1,
QCAFRM_HW_LEN2 = QCAFRM_HW_LEN1 - 1,
@@ -101,6 +102,8 @@ enum qcafrm_state {
struct qcafrm_handle {
/* Current decoding state */
enum qcafrm_state state;
+ /* Initial state depends on connection type */
+ enum qcafrm_state init;
/* Offset in buffer (borrowed for length too) */
u16 offset;
@@ -113,9 +116,10 @@ u16 qcafrm_create_header(u8 *buf, u16 len);
u16 qcafrm_create_footer(u8 *buf);
-static inline void qcafrm_fsm_init(struct qcafrm_handle *handle)
+static inline void qcafrm_fsm_init_spi(struct qcafrm_handle *handle)
{
- handle->state = QCAFRM_HW_LEN0;
+ handle->init = QCAFRM_HW_LEN0;
+ handle->state = handle->init;
}
/* Gather received bytes and try to extract a full Ethernet frame
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 43cc7de..de78f60 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -638,7 +638,7 @@ qcaspi_netdev_open(struct net_device *dev)
qca->intr_req = 1;
qca->intr_svc = 0;
qca->sync = QCASPI_SYNC_UNKNOWN;
- qcafrm_fsm_init(&qca->frm_handle);
+ qcafrm_fsm_init_spi(&qca->frm_handle);
qca->spi_thread = kthread_run((void *)qcaspi_spi_thread,
qca, "%s", dev->name);
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 12/17] net: qualcomm: make qca_7k_common a separate kernel module
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
In order to share common functions between QCA7000 SPI and UART protocol
driver the qca_7k_common needs to be a separate kernel module.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/Kconfig | 8 +++++++-
drivers/net/ethernet/qualcomm/Makefile | 5 +++--
drivers/net/ethernet/qualcomm/qca_7k_common.c | 10 ++++++++++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/qualcomm/Kconfig b/drivers/net/ethernet/qualcomm/Kconfig
index d7720bf..b4c369d 100644
--- a/drivers/net/ethernet/qualcomm/Kconfig
+++ b/drivers/net/ethernet/qualcomm/Kconfig
@@ -16,7 +16,13 @@ config NET_VENDOR_QUALCOMM
if NET_VENDOR_QUALCOMM
config QCA7000
- tristate "Qualcomm Atheros QCA7000 support"
+ tristate
+ help
+ This enables support for the Qualcomm Atheros QCA7000.
+
+config QCA7000_SPI
+ tristate "Qualcomm Atheros QCA7000 SPI support"
+ select QCA7000
depends on SPI_MASTER && OF
---help---
This SPI protocol driver supports the Qualcomm Atheros QCA7000.
diff --git a/drivers/net/ethernet/qualcomm/Makefile b/drivers/net/ethernet/qualcomm/Makefile
index 5e17bf1..65556ca 100644
--- a/drivers/net/ethernet/qualcomm/Makefile
+++ b/drivers/net/ethernet/qualcomm/Makefile
@@ -2,7 +2,8 @@
# Makefile for the Qualcomm network device drivers.
#
-obj-$(CONFIG_QCA7000) += qcaspi.o
-qcaspi-objs := qca_spi.o qca_7k_common.o qca_7k.o qca_debug.o
+obj-$(CONFIG_QCA7000) += qca_7k_common.o
+obj-$(CONFIG_QCA7000_SPI) += qcaspi.o
+qcaspi-objs := qca_7k.o qca_debug.o qca_spi.o
obj-y += emac/
diff --git a/drivers/net/ethernet/qualcomm/qca_7k_common.c b/drivers/net/ethernet/qualcomm/qca_7k_common.c
index 0d3daa9..6b511f0 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k_common.c
+++ b/drivers/net/ethernet/qualcomm/qca_7k_common.c
@@ -21,7 +21,9 @@
* by an atheros frame while transmitted over a serial channel;
*/
+#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include "qca_7k_common.h"
@@ -46,6 +48,7 @@ qcafrm_create_header(u8 *buf, u16 length)
return QCAFRM_HEADER_LEN;
}
+EXPORT_SYMBOL_GPL(qcafrm_create_header);
u16
qcafrm_create_footer(u8 *buf)
@@ -57,6 +60,7 @@ qcafrm_create_footer(u8 *buf)
buf[1] = 0x55;
return QCAFRM_FOOTER_LEN;
}
+EXPORT_SYMBOL_GPL(qcafrm_create_footer);
/* Gather received bytes and try to extract a full ethernet frame by
* following a simple state machine.
@@ -154,3 +158,9 @@ qcafrm_fsm_decode(struct qcafrm_handle *handle, u8 *buf, u16 buf_len, u8 recv_by
return ret;
}
+EXPORT_SYMBOL_GPL(qcafrm_fsm_decode);
+
+MODULE_DESCRIPTION("Qualcomm Atheros QCA7000 common");
+MODULE_AUTHOR("Qualcomm Atheros Communications");
+MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
+MODULE_LICENSE("Dual BSD/GPL");
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 13/17] dt-bindings: qca7000-spi: Rework binding
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
In preparation for the QCA7000 UART binding rework the binding document.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
.../devicetree/bindings/net/qca-qca7000-spi.txt | 49 +++++++++++++---------
1 file changed, 29 insertions(+), 20 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
index c74989c..a37f656 100644
--- a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
+++ b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
@@ -1,29 +1,38 @@
-* Qualcomm QCA7000 (Ethernet over SPI protocol)
+* Qualcomm QCA7000
-Note: The QCA7000 is useable as a SPI device. In this case it must be defined
-as a child of a SPI master in the device tree.
+The QCA7000 is a serial-to-powerline bridge with a host interface which could
+be configured either as SPI or UART slave. This configuration is done by
+the QCA7000 firmware.
+
+(a) Ethernet over SPI
+
+In order to use the QCA7000 as SPI device it must be defined as a child of a
+SPI master in the device tree.
Required properties:
-- compatible : Should be "qca,qca7000"
-- reg : Should specify the SPI chip select
-- interrupts : The first cell should specify the index of the source interrupt
- and the second cell should specify the trigger type as rising edge
-- spi-cpha : Must be set
-- spi-cpol: Must be set
+- compatible : Should be "qca,qca7000"
+- reg : Should specify the SPI chip select
+- interrupts : The first cell should specify the index of the source
+ interrupt and the second cell should specify the trigger
+ type as rising edge
+- spi-cpha : Must be set
+- spi-cpol : Must be set
Optional properties:
-- interrupt-parent : Specify the pHandle of the source interrupt
+- interrupt-parent : Specify the pHandle of the source interrupt
- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at.
- Numbers smaller than 1000000 or greater than 16000000 are invalid. Missing
- the property will set the SPI frequency to 8000000 Hertz.
-- local-mac-address: 6 bytes, MAC address
-- qca,legacy-mode : Set the SPI data transfer of the QCA7000 to legacy mode.
- In this mode the SPI master must toggle the chip select between each data
- word. In burst mode these gaps aren't necessary, which is faster.
- This setting depends on how the QCA7000 is setup via GPIO pin strapping.
- If the property is missing the driver defaults to burst mode.
-
-Example:
+ Numbers smaller than 1000000 or greater than 16000000
+ are invalid. Missing the property will set the SPI
+ frequency to 8000000 Hertz.
+- local-mac-address : see ./ethernet.txt
+- qca,legacy-mode : Set the SPI data transfer of the QCA7000 to legacy mode.
+ In this mode the SPI master must toggle the chip select
+ between each data word. In burst mode these gaps aren't
+ necessary, which is faster. This setting depends on how
+ the QCA7000 is setup via GPIO pin strapping. If the
+ property is missing the driver defaults to burst mode.
+
+SPI Example:
/* Freescale i.MX28 SPI master*/
ssp2: spi@80014000 {
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 14/17] dt-bindings: qca7000: rename binding
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
Before we can merge the QCA7000 UART binding the document needs to be
renamed.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
.../devicetree/bindings/net/{qca-qca7000-spi.txt => qca,qca7000.txt} | 0
1 file changed, 0 insertions(+), 0 deletions(-)
rename Documentation/devicetree/bindings/net/{qca-qca7000-spi.txt => qca,qca7000.txt} (100%)
diff --git a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt b/Documentation/devicetree/bindings/net/qca,qca7000.txt
similarity index 100%
rename from Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
rename to Documentation/devicetree/bindings/net/qca,qca7000.txt
--
2.1.4
^ permalink raw reply
* [PATCH v6 net-next 15/17] dt-bindings: slave-device: add current-speed property
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree, netdev, linux-serial, linux-kernel, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren@i2se.com>
This adds a new DT property to define the current baud rate of the
slave device.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Documentation/devicetree/bindings/serial/slave-device.txt | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/slave-device.txt b/Documentation/devicetree/bindings/serial/slave-device.txt
index f660379..40110e0 100644
--- a/Documentation/devicetree/bindings/serial/slave-device.txt
+++ b/Documentation/devicetree/bindings/serial/slave-device.txt
@@ -21,6 +21,15 @@ Optional Properties:
can support. For example, a particular board has some signal
quality issue or the host processor can't support higher
baud rates.
+- current-speed : The current baud rate the device operates at. This should
+ only be present in case a driver has no chance to know
+ the baud rate of the slave device.
+ Examples:
+ * device supports auto-baud
+ * the rate is setup by a bootloader and there is no
+ way to reset the device
+ * device baud rate is configured by its firmware but
+ there is no way to request the actual settings
Example:
--
2.1.4
^ permalink raw reply related
* [PATCH v6 net-next 16/17] dt-bindings: qca7000: append UART interface to binding
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree-u79uwXL29TY76Z2rM5mHXA, netdev-u79uwXL29TY76Z2rM5mHXA,
linux-serial-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org>
This merges the serdev binding for the QCA7000 UART driver (Ethernet over
UART) into the existing document.
Signed-off-by: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
---
.../devicetree/bindings/net/qca,qca7000.txt | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/qca,qca7000.txt b/Documentation/devicetree/bindings/net/qca,qca7000.txt
index a37f656..6d9efb2 100644
--- a/Documentation/devicetree/bindings/net/qca,qca7000.txt
+++ b/Documentation/devicetree/bindings/net/qca,qca7000.txt
@@ -54,3 +54,35 @@ ssp2: spi@80014000 {
local-mac-address = [ A0 B0 C0 D0 E0 F0 ];
};
};
+
+(b) Ethernet over UART
+
+In order to use the QCA7000 as UART slave it must be defined as a child of a
+UART master in the device tree. It is possible to preconfigure the UART
+settings of the QCA7000 firmware, but it's not possible to change them during
+runtime.
+
+Required properties:
+- compatible : Should be "qca,qca7000"
+
+Optional properties:
+- local-mac-address : see ./ethernet.txt
+- current-speed : current baud rate of QCA7000 which defaults to 115200
+ if absent, see also ../serial/slave-device.txt
+
+UART Example:
+
+/* Freescale i.MX28 UART */
+auart0: serial@8006a000 {
+ compatible = "fsl,imx28-auart", "fsl,imx23-auart";
+ reg = <0x8006a000 0x2000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&auart0_2pins_a>;
+ status = "okay";
+
+ qca7000: ethernet {
+ compatible = "qca,qca7000";
+ local-mac-address = [ A0 B0 C0 D0 E0 F0 ];
+ current-speed = <38400>;
+ };
+};
--
2.1.4
--
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^ permalink raw reply related
* [PATCH v6 net-next 17/17] net: qualcomm: add QCA7000 UART driver
From: Stefan Wahren @ 2017-05-23 13:12 UTC (permalink / raw)
To: Rob Herring, Mark Rutland, David S. Miller
Cc: Greg Kroah-Hartman, Jiri Slaby, Lino Sanfilippo, Jakub Kicinski,
devicetree-u79uwXL29TY76Z2rM5mHXA, netdev-u79uwXL29TY76Z2rM5mHXA,
linux-serial-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, Stefan Wahren
In-Reply-To: <1495545173-22150-1-git-send-email-stefan.wahren-eS4NqCHxEME@public.gmane.org>
This patch adds the Ethernet over UART driver for the
Qualcomm QCA7000 HomePlug GreenPHY.
Signed-off-by: Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>
---
drivers/net/ethernet/qualcomm/Kconfig | 16 +
drivers/net/ethernet/qualcomm/Makefile | 2 +
drivers/net/ethernet/qualcomm/qca_7k_common.h | 6 +
drivers/net/ethernet/qualcomm/qca_uart.c | 423 ++++++++++++++++++++++++++
4 files changed, 447 insertions(+)
create mode 100644 drivers/net/ethernet/qualcomm/qca_uart.c
diff --git a/drivers/net/ethernet/qualcomm/Kconfig b/drivers/net/ethernet/qualcomm/Kconfig
index b4c369d..877675a 100644
--- a/drivers/net/ethernet/qualcomm/Kconfig
+++ b/drivers/net/ethernet/qualcomm/Kconfig
@@ -30,6 +30,22 @@ config QCA7000_SPI
To compile this driver as a module, choose M here. The module
will be called qcaspi.
+config QCA7000_UART
+ tristate "Qualcomm Atheros QCA7000 UART support"
+ select QCA7000
+ depends on SERIAL_DEV_BUS && OF
+ ---help---
+ This UART protocol driver supports the Qualcomm Atheros QCA7000.
+
+ Currently the driver assumes these device UART settings:
+ Data bits: 8
+ Parity: None
+ Stop bits: 1
+ Flow control: None
+
+ To compile this driver as a module, choose M here. The module
+ will be called qcauart.
+
config QCOM_EMAC
tristate "Qualcomm Technologies, Inc. EMAC Gigabit Ethernet support"
depends on HAS_DMA && HAS_IOMEM
diff --git a/drivers/net/ethernet/qualcomm/Makefile b/drivers/net/ethernet/qualcomm/Makefile
index 65556ca..92fa7c4 100644
--- a/drivers/net/ethernet/qualcomm/Makefile
+++ b/drivers/net/ethernet/qualcomm/Makefile
@@ -5,5 +5,7 @@
obj-$(CONFIG_QCA7000) += qca_7k_common.o
obj-$(CONFIG_QCA7000_SPI) += qcaspi.o
qcaspi-objs := qca_7k.o qca_debug.o qca_spi.o
+obj-$(CONFIG_QCA7000_UART) += qcauart.o
+qcauart-objs := qca_uart.o
obj-y += emac/
diff --git a/drivers/net/ethernet/qualcomm/qca_7k_common.h b/drivers/net/ethernet/qualcomm/qca_7k_common.h
index 07bdd6c..928554f 100644
--- a/drivers/net/ethernet/qualcomm/qca_7k_common.h
+++ b/drivers/net/ethernet/qualcomm/qca_7k_common.h
@@ -122,6 +122,12 @@ static inline void qcafrm_fsm_init_spi(struct qcafrm_handle *handle)
handle->state = handle->init;
}
+static inline void qcafrm_fsm_init_uart(struct qcafrm_handle *handle)
+{
+ handle->init = QCAFRM_WAIT_AA1;
+ handle->state = handle->init;
+}
+
/* Gather received bytes and try to extract a full Ethernet frame
* by following a simple state machine.
*
diff --git a/drivers/net/ethernet/qualcomm/qca_uart.c b/drivers/net/ethernet/qualcomm/qca_uart.c
new file mode 100644
index 0000000..43d91ba
--- /dev/null
+++ b/drivers/net/ethernet/qualcomm/qca_uart.c
@@ -0,0 +1,423 @@
+/*
+ * Copyright (c) 2011, 2012, Qualcomm Atheros Communications Inc.
+ * Copyright (c) 2017, I2SE GmbH
+ *
+ * Permission to use, copy, modify, and/or distribute this software
+ * for any purpose with or without fee is hereby granted, provided
+ * that the above copyright notice and this permission notice appear
+ * in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* This module implements the Qualcomm Atheros UART protocol for
+ * kernel-based UART device; it is essentially an Ethernet-to-UART
+ * serial converter;
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
+#include <linux/sched.h>
+#include <linux/serdev.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+
+#include "qca_7k_common.h"
+
+#define QCAUART_DRV_VERSION "0.1.0"
+#define QCAUART_DRV_NAME "qcauart"
+#define QCAUART_TX_TIMEOUT (1 * HZ)
+
+struct qcauart {
+ struct net_device *net_dev;
+ spinlock_t lock; /* transmit lock */
+ struct work_struct tx_work; /* Flushes transmit buffer */
+
+ struct serdev_device *serdev;
+ struct qcafrm_handle frm_handle;
+ struct sk_buff *rx_skb;
+
+ unsigned char *tx_head; /* pointer to next XMIT byte */
+ int tx_left; /* bytes left in XMIT queue */
+ unsigned char *tx_buffer;
+};
+
+static int
+qca_tty_receive(struct serdev_device *serdev, const unsigned char *data,
+ size_t count)
+{
+ struct qcauart *qca = serdev_device_get_drvdata(serdev);
+ struct net_device *netdev = qca->net_dev;
+ struct net_device_stats *n_stats = &netdev->stats;
+ size_t i;
+
+ if (!qca->rx_skb) {
+ qca->rx_skb = netdev_alloc_skb_ip_align(netdev,
+ netdev->mtu +
+ VLAN_ETH_HLEN);
+ if (!qca->rx_skb) {
+ n_stats->rx_errors++;
+ n_stats->rx_dropped++;
+ return 0;
+ }
+ }
+
+ for (i = 0; i < count; i++) {
+ s32 retcode;
+
+ retcode = qcafrm_fsm_decode(&qca->frm_handle,
+ qca->rx_skb->data,
+ skb_tailroom(qca->rx_skb),
+ data[i]);
+
+ switch (retcode) {
+ case QCAFRM_GATHER:
+ case QCAFRM_NOHEAD:
+ break;
+ case QCAFRM_NOTAIL:
+ netdev_dbg(netdev, "recv: no RX tail\n");
+ n_stats->rx_errors++;
+ n_stats->rx_dropped++;
+ break;
+ case QCAFRM_INVLEN:
+ netdev_dbg(netdev, "recv: invalid RX length\n");
+ n_stats->rx_errors++;
+ n_stats->rx_dropped++;
+ break;
+ default:
+ n_stats->rx_packets++;
+ n_stats->rx_bytes += retcode;
+ skb_put(qca->rx_skb, retcode);
+ qca->rx_skb->protocol = eth_type_trans(
+ qca->rx_skb, qca->rx_skb->dev);
+ qca->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
+ netif_rx_ni(qca->rx_skb);
+ qca->rx_skb = netdev_alloc_skb_ip_align(netdev,
+ netdev->mtu +
+ VLAN_ETH_HLEN);
+ if (!qca->rx_skb) {
+ netdev_dbg(netdev, "recv: out of RX resources\n");
+ n_stats->rx_errors++;
+ return i;
+ }
+ }
+ }
+
+ return i;
+}
+
+/* Write out any remaining transmit buffer. Scheduled when tty is writable */
+static void qcauart_transmit(struct work_struct *work)
+{
+ struct qcauart *qca = container_of(work, struct qcauart, tx_work);
+ struct net_device_stats *n_stats = &qca->net_dev->stats;
+ int written;
+
+ spin_lock_bh(&qca->lock);
+
+ /* First make sure we're connected. */
+ if (!netif_running(qca->net_dev)) {
+ spin_unlock_bh(&qca->lock);
+ return;
+ }
+
+ if (qca->tx_left <= 0) {
+ /* Now serial buffer is almost free & we can start
+ * transmission of another packet
+ */
+ n_stats->tx_packets++;
+ spin_unlock_bh(&qca->lock);
+ netif_wake_queue(qca->net_dev);
+ return;
+ }
+
+ written = serdev_device_write_buf(qca->serdev, qca->tx_head,
+ qca->tx_left);
+ if (written > 0) {
+ qca->tx_left -= written;
+ qca->tx_head += written;
+ }
+ spin_unlock_bh(&qca->lock);
+}
+
+/* Called by the driver when there's room for more data.
+ * Schedule the transmit.
+ */
+static void qca_tty_wakeup(struct serdev_device *serdev)
+{
+ struct qcauart *qca = serdev_device_get_drvdata(serdev);
+
+ schedule_work(&qca->tx_work);
+}
+
+static struct serdev_device_ops qca_serdev_ops = {
+ .receive_buf = qca_tty_receive,
+ .write_wakeup = qca_tty_wakeup,
+};
+
+static int qcauart_netdev_open(struct net_device *dev)
+{
+ struct qcauart *qca = netdev_priv(dev);
+
+ netif_start_queue(qca->net_dev);
+
+ return 0;
+}
+
+static int qcauart_netdev_close(struct net_device *dev)
+{
+ struct qcauart *qca = netdev_priv(dev);
+
+ netif_stop_queue(dev);
+ flush_work(&qca->tx_work);
+
+ spin_lock_bh(&qca->lock);
+ qca->tx_left = 0;
+ spin_unlock_bh(&qca->lock);
+
+ return 0;
+}
+
+static netdev_tx_t
+qcauart_netdev_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct net_device_stats *n_stats = &dev->stats;
+ struct qcauart *qca = netdev_priv(dev);
+ u8 pad_len = 0;
+ int written;
+ u8 *pos;
+
+ spin_lock(&qca->lock);
+
+ WARN_ON(qca->tx_left);
+
+ if (!netif_running(dev)) {
+ spin_unlock(&qca->lock);
+ netdev_warn(qca->net_dev, "xmit: iface is down\n");
+ goto out;
+ }
+
+ pos = qca->tx_buffer;
+
+ if (skb->len < QCAFRM_MIN_LEN)
+ pad_len = QCAFRM_MIN_LEN - skb->len;
+
+ pos += qcafrm_create_header(pos, skb->len + pad_len);
+
+ memcpy(pos, skb->data, skb->len);
+ pos += skb->len;
+
+ if (pad_len) {
+ memset(pos, 0, pad_len);
+ pos += pad_len;
+ }
+
+ pos += qcafrm_create_footer(pos);
+
+ netif_stop_queue(qca->net_dev);
+
+ written = serdev_device_write_buf(qca->serdev, qca->tx_buffer,
+ pos - qca->tx_buffer);
+ if (written > 0) {
+ qca->tx_left = (pos - qca->tx_buffer) - written;
+ qca->tx_head = qca->tx_buffer + written;
+ n_stats->tx_bytes += written;
+ }
+ spin_unlock(&qca->lock);
+
+ netif_trans_update(dev);
+out:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
+
+static void qcauart_netdev_tx_timeout(struct net_device *dev)
+{
+ struct qcauart *qca = netdev_priv(dev);
+
+ netdev_info(qca->net_dev, "Transmit timeout at %ld, latency %ld\n",
+ jiffies, dev_trans_start(dev));
+ dev->stats.tx_errors++;
+ dev->stats.tx_dropped++;
+}
+
+static int qcauart_netdev_init(struct net_device *dev)
+{
+ struct qcauart *qca = netdev_priv(dev);
+ size_t len;
+
+ /* Finish setting up the device info. */
+ dev->mtu = QCAFRM_MAX_MTU;
+ dev->type = ARPHRD_ETHER;
+
+ len = QCAFRM_HEADER_LEN + QCAFRM_MAX_LEN + QCAFRM_FOOTER_LEN;
+ qca->tx_buffer = devm_kmalloc(&qca->serdev->dev, len, GFP_KERNEL);
+ if (!qca->tx_buffer)
+ return -ENOMEM;
+
+ qca->rx_skb = netdev_alloc_skb_ip_align(qca->net_dev,
+ qca->net_dev->mtu +
+ VLAN_ETH_HLEN);
+ if (!qca->rx_skb)
+ return -ENOBUFS;
+
+ return 0;
+}
+
+static void qcauart_netdev_uninit(struct net_device *dev)
+{
+ struct qcauart *qca = netdev_priv(dev);
+
+ if (qca->rx_skb)
+ dev_kfree_skb(qca->rx_skb);
+}
+
+static const struct net_device_ops qcauart_netdev_ops = {
+ .ndo_init = qcauart_netdev_init,
+ .ndo_uninit = qcauart_netdev_uninit,
+ .ndo_open = qcauart_netdev_open,
+ .ndo_stop = qcauart_netdev_close,
+ .ndo_start_xmit = qcauart_netdev_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_tx_timeout = qcauart_netdev_tx_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static void qcauart_netdev_setup(struct net_device *dev)
+{
+ dev->netdev_ops = &qcauart_netdev_ops;
+ dev->watchdog_timeo = QCAUART_TX_TIMEOUT;
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ dev->tx_queue_len = 100;
+
+ /* MTU range: 46 - 1500 */
+ dev->min_mtu = QCAFRM_MIN_MTU;
+ dev->max_mtu = QCAFRM_MAX_MTU;
+}
+
+static const struct of_device_id qca_uart_of_match[] = {
+ {
+ .compatible = "qca,qca7000",
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, qca_uart_of_match);
+
+static int qca_uart_probe(struct serdev_device *serdev)
+{
+ struct net_device *qcauart_dev = alloc_etherdev(sizeof(struct qcauart));
+ struct qcauart *qca;
+ const char *mac;
+ u32 speed = 115200;
+ int ret;
+
+ if (!qcauart_dev)
+ return -ENOMEM;
+
+ qcauart_netdev_setup(qcauart_dev);
+ SET_NETDEV_DEV(qcauart_dev, &serdev->dev);
+
+ qca = netdev_priv(qcauart_dev);
+ if (!qca) {
+ pr_err("qca_uart: Fail to retrieve private structure\n");
+ ret = -ENOMEM;
+ goto free;
+ }
+ qca->net_dev = qcauart_dev;
+ qca->serdev = serdev;
+ qcafrm_fsm_init_uart(&qca->frm_handle);
+
+ spin_lock_init(&qca->lock);
+ INIT_WORK(&qca->tx_work, qcauart_transmit);
+
+ of_property_read_u32(serdev->dev.of_node, "current-speed", &speed);
+
+ mac = of_get_mac_address(serdev->dev.of_node);
+
+ if (mac)
+ ether_addr_copy(qca->net_dev->dev_addr, mac);
+
+ if (!is_valid_ether_addr(qca->net_dev->dev_addr)) {
+ eth_hw_addr_random(qca->net_dev);
+ dev_info(&serdev->dev, "Using random MAC address: %pM\n",
+ qca->net_dev->dev_addr);
+ }
+
+ netif_carrier_on(qca->net_dev);
+ serdev_device_set_drvdata(serdev, qca);
+ serdev_device_set_client_ops(serdev, &qca_serdev_ops);
+
+ ret = serdev_device_open(serdev);
+ if (ret) {
+ dev_err(&serdev->dev, "Unable to open device %s\n",
+ qcauart_dev->name);
+ goto free;
+ }
+
+ speed = serdev_device_set_baudrate(serdev, speed);
+ dev_info(&serdev->dev, "Using baudrate: %u\n", speed);
+
+ serdev_device_set_flow_control(serdev, false);
+
+ ret = register_netdev(qcauart_dev);
+ if (ret) {
+ dev_err(&serdev->dev, "Unable to register net device %s\n",
+ qcauart_dev->name);
+ serdev_device_close(serdev);
+ goto free;
+ }
+
+ return 0;
+
+free:
+ free_netdev(qcauart_dev);
+ return ret;
+}
+
+static void qca_uart_remove(struct serdev_device *serdev)
+{
+ struct qcauart *qca = serdev_device_get_drvdata(serdev);
+
+ netif_carrier_off(qca->net_dev);
+ cancel_work_sync(&qca->tx_work);
+ unregister_netdev(qca->net_dev);
+
+ /* Flush any pending characters in the driver. */
+ serdev_device_close(serdev);
+
+ free_netdev(qca->net_dev);
+}
+
+static struct serdev_device_driver qca_uart_driver = {
+ .probe = qca_uart_probe,
+ .remove = qca_uart_remove,
+ .driver = {
+ .name = QCAUART_DRV_NAME,
+ .of_match_table = of_match_ptr(qca_uart_of_match),
+ },
+};
+
+module_serdev_device_driver(qca_uart_driver);
+
+MODULE_DESCRIPTION("Qualcomm Atheros QCA7000 UART Driver");
+MODULE_AUTHOR("Qualcomm Atheros Communications");
+MODULE_AUTHOR("Stefan Wahren <stefan.wahren-eS4NqCHxEME@public.gmane.org>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(QCAUART_DRV_VERSION);
--
2.1.4
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