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  1. 17 7月, 2012 1 次提交
  3. 03 7月, 2012 1 次提交
    • H
      can: flexcan: add hardware controller version support · 30c1e672
      由 Hui Wang 提交于 
      At least in the i.MX series, the flexcan contrller divides into ver_3
and ver_10, current driver is for ver_3 controller.

i.MX6 has ver_10 controller, it has more reigsters than ver_3 has.
The rxfgmask (Rx FIFO Global Mask) register is one of the new added.
Its reset value is 0xffffffff, this means ID Filter Table must be
checked when receive a packet, but the driver is designed to accept
everything during the chip start, we need to clear this register to
follow this design.

Use the data entry of the struct of_device_id to point chip specific
info, we can set hardware version for each platform.

Cc: linux-can@vger.kernel.org
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: NHui Wang <jason77.wang@gmail.com>
[mkl: add id_table support]
Tested-by: NHui Wang <jason77.wang@gmail.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      30c1e672
  5. 02 7月, 2012 3 次提交
  7. 27 6月, 2012 1 次提交
  9. 21 6月, 2012 1 次提交
  11. 20 6月, 2012 3 次提交
  13. 16 6月, 2012 1 次提交
  15. 07 6月, 2012 3 次提交
    • A
      can: c_can: Add support for Bosch D_CAN controller · 69927fcc
      由 AnilKumar Ch 提交于 
      This patch adds the support for D_CAN controller driver to the existing
C_CAN driver.

Bosch D_CAN controller is a full-CAN implementation which is compliant
to CAN protocol version 2.0 part A and B. Bosch D_CAN user manual can be
obtained from: http://www.semiconductors.bosch.de/media/en/pdf/
ipmodules_1/can/d_can_users_manual_111.pdf

A new array is added for accessing the d_can registers, according to d_can
controller register space.

Current D_CAN implementation has following limitations, this is done
to avoid large changes to the C_CAN driver.
1. Message objects are limited to 32, 16 for RX and 16 for TX. C_CAN IP
   supports upto 32 message objects but in case of D_CAN we can configure
   upto 128 message objects.
2. Using two 16bit reads/writes for accessing the 32bit D_CAN registers.
3. These patches have been tested on little endian machine, there might
   be some hidden endian-related issues due to the nature of the accesses
   (32-bit registers accessed as 2 16-bit registers). However, I do not
   have a big-endian D_CAN implementation to confirm.
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      69927fcc
    • A
      can: c_can: Move overlay structure to array with offset as index · 33f81009
      由 AnilKumar Ch 提交于 
      c_can uses overlay structure for accessing c_can module registers.
With this kind of implementation it is difficult to add one more ip
which is similar to c_can in functionality but different register
offsets.

This patch changes the overlay structure implementation to an array
with register offset as index. This way we can overcome the above
limitation.
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      33f81009
    • J
      drivers: net: Remove casts to same type · c2fd03a0
      由 Joe Perches 提交于 
      Adding casts of objects to the same type is unnecessary
and confusing for a human reader.

For example, this cast:

        int y;
        int *p = (int *)&y;

I used the coccinelle script below to find and remove these
unnecessary casts.  I manually removed the conversions this
script produces of casts with __force, __iomem and __user.

@@
type T;
T *p;
@@

-       (T *)p
+       p
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c2fd03a0
  17. 04 6月, 2012 4 次提交
    • J
      can: cc770: Fix likely misuse of | for & · dc605dbd
      由 Joe Perches 提交于 
      Using | with a constant is always true.
Likely this should have be &.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      dc605dbd
    • A
      can: c_can: fix race condition in c_can_open() · f461f27a
      由 AnilKumar Ch 提交于 
      Fix the issue of C_CAN interrupts getting disabled forever when canconfig
utility is used multiple times. According to NAPI usage we disable all
the hardware interrupts in ISR and re-enable them in poll(). Current
implementation calls napi_enable() after hardware interrupts are enabled.
If we get any interrupts between these two steps then we do not process
those interrupts because napi is not enabled. Mostly these interrupts
come because of STATUS is not 0x7 or ERROR interrupts. If napi_enable()
happens before HW interrupts enabled then c_can_poll() function will be
called eventual re-enabling.

This patch moves the napi_enable() call before interrupts enabled.

Cc: stable@kernel.org # 2.6.39+
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      f461f27a
    • A
      can: c_can: fix an interrupt thrash issue with c_can driver · 148c87c8
      由 AnilKumar Ch 提交于 
      This patch fixes an interrupt thrash issue with c_can driver.

In c_can_isr() function interrupts are disabled and enabled only in
c_can_poll() function. c_can_isr() & c_can_poll() both read the
irqstatus flag. However, irqstatus is always read as 0 in c_can_poll()
because all C_CAN interrupts are disabled in c_can_isr(). This causes
all interrupts to be re-enabled in c_can_poll() which in turn causes
another interrupt since the event is not really handled. This keeps
happening causing a flood of interrupts.

To fix this, read the irqstatus register in isr and use the same cached
value in the poll function.

Cc: stable@kernel.org # 2.6.39+
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      148c87c8
    • A
      can: c_can: fix "BUG! echo_skb is occupied!" during transmit · 617cacce
      由 AnilKumar Ch 提交于 
      This patch fixes an issue with transmit routine, which causes
"can_put_echo_skb: BUG! echo_skb is occupied!" message when
using "cansequence -p" on D_CAN controller.

In c_can driver, while transmitting packets tx_echo flag holds
the no of can frames put for transmission into the hardware.

As the comment above c_can_do_tx() indicates, if we find any packet
which is not transmitted then we should stop looking for more.
In the current implementation this is not taken care of causing the
said message.

Also, fix the condition used to find if the packet is transmitted
or not. Current code skips the first tx message object and ends up
checking one extra invalid object.

While at it, fix the comment on top of c_can_do_tx() to use the
terminology "packet" instead of "package" since it is more
standard.

Cc: stable@kernel.org # 2.6.39+
Signed-off-by: NAnilKumar Ch <anilkumar@ti.com>
Acked-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
      617cacce
  19. 24 5月, 2012 1 次提交
  21. 12 5月, 2012 1 次提交
  23. 18 4月, 2012 1 次提交
  25. 17 4月, 2012 2 次提交
  27. 02 4月, 2012 1 次提交
  29. 29 3月, 2012 1 次提交
  31. 07 3月, 2012 1 次提交
  33. 04 3月, 2012 6 次提交
  35. 20 2月, 2012 1 次提交
  37. 03 2月, 2012 7 次提交