[PATCH] xilinx_pcipr: Added Xilinx reconfigurable PCI endpoint driver.
Grant Likely
grant.likely at secretlab.ca
Tue Jun 29 08:23:19 EST 2010
On Mon, Jun 28, 2010 at 10:47 AM, Stephen Neuendorffer
<stephen.neuendorffer at xilinx.com> wrote:
> This bus has an internal bus which contains some devices, which
> are described in a device tree. This code is *very* preliminary
> and mainly exists to exercise the device tree code on an arbitrary
> architecture.
> ---
> drivers/pci/Kconfig | 9 ++
> drivers/pci/Makefile | 2 +
> drivers/pci/xilinx_pcipr.c | 203 ++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 214 insertions(+), 0 deletions(-)
> create mode 100644 drivers/pci/xilinx_pcipr.c
>
> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
> index 34ef70d..ec9b25d 100644
> --- a/drivers/pci/Kconfig
> +++ b/drivers/pci/Kconfig
> @@ -65,3 +65,12 @@ config PCI_IOAPIC
> depends on ACPI
> depends on HOTPLUG
> default y
> +
> +config XILINX_PCIPR
> + tristate "Xilinx OF-based PCI endpoint"
> + depends on PCI
> + select OF
> + select OF_FLATTREE
> + select OF_DEVICE
> + help
> + Enable support for Xilinx PCIPR endpoint
> \ No newline at end of file
> diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
> index 0b51857..ec44c21 100644
> --- a/drivers/pci/Makefile
> +++ b/drivers/pci/Makefile
> @@ -62,6 +62,8 @@ obj-$(CONFIG_PCI_SYSCALL) += syscall.o
>
> obj-$(CONFIG_PCI_STUB) += pci-stub.o
>
> +obj-$(CONFIG_XILINX_PCIPR) += xilinx_pcipr.o
> +
> ifeq ($(CONFIG_PCI_DEBUG),y)
> EXTRA_CFLAGS += -DDEBUG
> endif
> diff --git a/drivers/pci/xilinx_pcipr.c b/drivers/pci/xilinx_pcipr.c
> new file mode 100644
> index 0000000..17fde0b
> --- /dev/null
> +++ b/drivers/pci/xilinx_pcipr.c
> @@ -0,0 +1,203 @@
> +/*
> + * Copyright 2010 Xilinx, Inc.
> + *
> + */
> +
> +#include <linux/module.h>
> +#include <linux/types.h>
> +#include <linux/kernel.h>
> +#include <linux/pci.h>
> +#include <linux/ide.h>
> +#include <linux/init.h>
> +#include <linux/dmi.h>
> +
> +#include <linux/of_fdt.h>
> +#include <linux/of_platform.h>
> +
> +
> +#include <asm/io.h>
> +
> +#define DRV_NAME "xilinx_pcipr"
> +
> +
> +unsigned char pcipr_dtb[] = {
> + 0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x01, 0x6a, 0x00, 0x00, 0x00, 0x38,
> + 0x00, 0x00, 0x01, 0x24, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x11,
> + 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46,
> + 0x00, 0x00, 0x00, 0xec, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03,
> + 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x01,
> + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x33, 0x00, 0x00, 0x00, 0x1b,
> + 0x78, 0x6c, 0x6e, 0x78, 0x2c, 0x70, 0x6c, 0x62, 0x2d, 0x76, 0x34, 0x36,
> + 0x2d, 0x31, 0x2e, 0x30, 0x33, 0x2e, 0x61, 0x00, 0x78, 0x6c, 0x6e, 0x78,
> + 0x2c, 0x70, 0x6c, 0x62, 0x2d, 0x76, 0x34, 0x36, 0x2d, 0x31, 0x2e, 0x30,
> + 0x30, 0x2e, 0x61, 0x00, 0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x2d, 0x62,
> + 0x75, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x78, 0x70, 0x73, 0x2d,
> + 0x68, 0x77, 0x69, 0x63, 0x61, 0x70, 0x40, 0x38, 0x30, 0x30, 0x33, 0x30,
> + 0x30, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x17,
> + 0x00, 0x00, 0x00, 0x1b, 0x78, 0x6c, 0x6e, 0x78, 0x2c, 0x78, 0x70, 0x73,
> + 0x2d, 0x68, 0x77, 0x69, 0x63, 0x61, 0x70, 0x2d, 0x31, 0x2e, 0x30, 0x30,
> + 0x2e, 0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x08,
> + 0x00, 0x00, 0x00, 0x26, 0x80, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
> + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x2a,
> + 0x76, 0x69, 0x72, 0x74, 0x65, 0x78, 0x35, 0x00, 0x00, 0x00, 0x00, 0x03,
> + 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x36, 0x66, 0x61, 0x6c, 0x73,
> + 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02,
> + 0x00, 0x00, 0x00, 0x09, 0x23, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73,
> + 0x2d, 0x63, 0x65, 0x6c, 0x6c, 0x73, 0x00, 0x23, 0x73, 0x69, 0x7a, 0x65,
> + 0x2d, 0x63, 0x65, 0x6c, 0x6c, 0x73, 0x00, 0x63, 0x6f, 0x6d, 0x70, 0x61,
> + 0x74, 0x69, 0x62, 0x6c, 0x65, 0x00, 0x72, 0x65, 0x67, 0x00, 0x78, 0x6c,
> + 0x6e, 0x78, 0x2c, 0x66, 0x61, 0x6d, 0x69, 0x6c, 0x79, 0x00, 0x78, 0x6c,
> + 0x6e, 0x78, 0x2c, 0x73, 0x69, 0x6d, 0x75, 0x6c, 0x61, 0x74, 0x69, 0x6f,
> + 0x6e, 0x00
> +};
> +unsigned int pcipr_dtb_len = 362;
> +
> +
> +struct xilinx_pcipr_drvdata {
> + unsigned long *blob;
> + struct device_node *child_nodes;
> +};
> +
> +/**
> + * xilinx_pcipr_probe - Setup the endpoint
> + * @dev: PCI device to set up
> + */
> +static int __devinit xilinx_pcipr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> +{
> + int ret;
> + struct xilinx_pcipr_drvdata *drvdata;
> + dev_dbg(&pdev->dev, "xilinx_pcipr_probe\n");
> +
> + drvdata = kzalloc(sizeof(struct xilinx_pcipr_drvdata), GFP_KERNEL);
> + if (!drvdata) {
> + dev_err(&pdev->dev, "Couldn't allocate device private record\n");
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + dev_set_drvdata(&pdev->dev, (void *)drvdata);
> +
> +/* /\* */
> +/* * If we failed to assign proper bus numbers for this cardbus */
> +/* * controller during PCI probe, its subordinate pci_bus is NULL. */
> +/* * Bail out if so. */
> +/* *\/ */
> +/* if (!dev->subordinate) { */
> +/* dev_printk(KERN_ERR, &dev->dev, "no bus associated! " */
> +/* "(try 'pci=assign-busses')\n"); */
> +/* return -ENODEV; */
> +/* } */
> +
> + /*
> + * Do some basic sanity checking..
> + */
> + if (pci_enable_device(pdev)) {
> + ret = -EBUSY;
> + goto free;
> + }
> +
> + ret = pci_request_regions(pdev, "xilinx_pcipr");
> + if (ret)
> + goto disable;
> +
> + if (!pci_resource_start(pdev, 0)) {
> + dev_printk(KERN_ERR, &pdev->dev, "No cardbus resource!\n");
> + ret = -ENODEV;
> + goto release;
> + }
> +
> + drvdata->blob = pcipr_dtb;
> +
> +/* /\* */
> +/* * Ok, start setup.. Map the cardbus registers, */
> +/* * and request the IRQ. */
> +/* *\/ */
> +/* socket->base = ioremap(pci_resource_start(pdev, 0), 0x1000); */
> +/* if (!socket->base) { */
> +/* ret = -ENOMEM; */
> +/* goto release; */
> +/* } */
> +
> + /*
> + * report the subsystem vendor and device for help debugging
> + * the irq stuff...
> + */
> + dev_printk(KERN_INFO, &pdev->dev, "Xilinx PCIPR bridge found [%04x:%04x]\n",
> + pdev->subsystem_vendor, pdev->subsystem_device);
> +
> +
> + // yenta_fixup_parent_bridge(dev->subordinate);
> +
> + // initialize our sub-devices.
> +
> +
> + unflatten_partial_device_tree(drvdata->blob, &drvdata->child_nodes);
> + of_platform_bus_probe(drvdata->child_nodes, NULL, &pdev->dev);
This looks fairly sane. As we talked about before, you'll probably
want to use the firmware loading mechanism to inject the dtb fragment
into the kernel.
g.
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