Hi Sylwester,
On Fri, 8 May 2020 at 05:46, Sylwester Nawrocki s.nawrocki@samsung.com wrote:
Hi Simon,
On 06.05.2020 16:47, Simon Glass wrote:
On Mon, 4 May 2020 at 06:45, Sylwester Nawrocki s.nawrocki@samsung.com wrote:
drivers/pci/Kconfig | 6 + drivers/pci/Makefile | 1 + drivers/pci/pcie_brcmstb.c | 594 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 601 insertions(+) create mode 100644 drivers/pci/pcie_brcmstb.c
A few small comments.
Thank you for time and a valuable review.
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
+config PCI_BRCMSTB
bool "Broadcom STB PCIe controller"depends on DM_PCIdepends on ARCH_BCM283XhelpSay Y here if you want to enable Broadcom STB PCIe controller support.What is STB? What features does this support? You should get a warning here to write at least three lines.
I'm going to change that help text to something along the lines of:
Say Y here if you want to enable support for PCIe controller on Broadcom set-top-box (STB) SoCs. This driver currently supports only BCM2711 SoC and RC mode of the controller.
diff --git a/drivers/pci/pcie_brcmstb.c b/drivers/pci/pcie_brcmstb.c new file mode 100644 index 0000000..c6ddf92 --- /dev/null +++ b/drivers/pci/pcie_brcmstb.c @@ -0,0 +1,594 @@
+#include <asm/io.h> +#include <common.h> +#include <dm.h> +#include <dm/ofnode.h> +#include <errno.h> +#include <linux/bitfield.h> +#include <linux/log2.h> +#include <pci.h>
Check ordering of include files:
https://protect2.fireeye.com/url?k=c3a0292d-9e737093-c3a1a262-0cc47a31ba82-6...
Thanks for the hint, it felt there was something wrong with the ordering.
+#define PCIE_MISC_MISC_CTRL 0x4008 +#define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK 0x1000 +#define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK 0x2000 +#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK 0x300000 +#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128 0x0 +#define PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK 0xf8000000
If you have a _MASK, don't you need a _SHIFT to allow you to read from the field?
I had shift definitions originally but these got removed when we started to use the FIELD_GET macro and similar. Shifts are retrieved there from a mask by ffs() call (find first bit set in a word). If that's not preferred in u-boot I will switch back to using explicit shift definitions.
+Tom Rini
We've had a policy of avoiding these for some time, but now that Linux has them, should we pull this in and start using it? It is not that widely used in Linux but has been there for a few years.
Regards, Simon