[ARM] orion/kirkwood: reset PCIe unit on boot

#include <linux/mbus.h>

#include <asm/mach/pci.h>

#include <plat/pcie.h>

#include <linux/delay.h>

/*

 * PCIe unit register offsets.

#define  PCIE_STAT_BUS_OFFS		8

#define  PCIE_STAT_BUS_MASK		0xff

#define  PCIE_STAT_LINK_DOWN		1

#define PCIE_DEBUG_CTRL         0x1a60

#define  PCIE_DEBUG_SOFT_RESET		(1<<20)

u32 __init orion_pcie_dev_id(void __iomem *base)

	writel(stat, base + PCIE_STAT_OFF);

}

void __init orion_pcie_reset(void __iomem *base)

{

	u32 reg;

	int i;

	/*

	 * MV-S104860-U0, Rev. C:

	 * PCI Express Unit Soft Reset

	 * When set, generates an internal reset in the PCI Express unit.

	 * This bit should be cleared after the link is re-established.

	 */

	reg = readl(base + PCIE_DEBUG_CTRL);

	reg |= PCIE_DEBUG_SOFT_RESET;

	writel(reg, base + PCIE_DEBUG_CTRL);

	for (i = 0; i < 20; i++) {

		mdelay(10);

		if (orion_pcie_link_up(base))

			break;

	}

	reg &= ~(PCIE_DEBUG_SOFT_RESET);

	writel(reg, base + PCIE_DEBUG_CTRL);

}

/*

 * Setup PCIE BARs and Address Decode Wins:

 * BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks

	u16 cmd;

	u32 mask;

	/*

	 * soft reset PCIe unit

	 */

	orion_pcie_reset(base);

	/*

	 * Point PCIe unit MBUS decode windows to DRAM space.

	 */