[RFC PATCH v0.001] PCI: Add support for tango PCIe controller

[Mason]

On 17/03/2017 17:11, Mason wrote:

> diff --git a/drivers/pci/host/pcie-tango.c b/drivers/pci/host/pcie-tango.c
> new file mode 100644
> index 000000000000..9d7fed75fd1d
> --- /dev/null
> +++ b/drivers/pci/host/pcie-tango.c
> @@ -0,0 +1,125 @@
> +#include <linux/pci-ecam.h>
> +
> +#define VENDOR_SIGMA	0x1105
> +
> +/*
> + * How do I reach dev->driver_data in the config accessors?
> + */
> +static void __iomem *mux;

	struct pci_config_window *cfg = bus->sysdata;
	dev_get_drvdata(cfg->parent);


/*
 * struct to hold the mappings of a config space window. This
 * is expected to be used as sysdata for PCI controllers that
 * use ECAM.
 */
struct pci_config_window {
	struct resource			res;
	struct resource			busr;
	void				*priv;
	struct pci_ecam_ops		*ops;
	union {
		void __iomem		*win;	/* 64-bit single mapping */
		void __iomem		**winp; /* 32-bit per-bus mapping */
	};
	struct device			*parent;/* ECAM res was from this dev */
};