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	The fdt_addr_t and phys_addr_t size have been decoupled. A 32bit CPU can expect 64-bit data from the device tree parser, so use devfdt_get_addr_index_ptr instead of the devfdt_get_addr_index function in the various files in the drivers directory that cast to a pointer. As we are there also streamline the error response to -EINVAL on return. Signed-off-by: Johan Jonker <jbx6244@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
		
			
				
	
	
		
			342 lines
		
	
	
		
			9.0 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			342 lines
		
	
	
		
			9.0 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
// SPDX-License-Identifier: GPL-2.0+
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/*
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 * Copyright 2020 NXP
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 * Layerscape PCIe EP driver
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 */
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#include <common.h>
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#include <asm/arch/fsl_serdes.h>
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#include <dm.h>
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#include <asm/global_data.h>
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#include <dm/devres.h>
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#include <errno.h>
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#include <pci_ep.h>
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#include <asm/io.h>
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#include <linux/sizes.h>
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#include <linux/log2.h>
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#include "pcie_layerscape.h"
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DECLARE_GLOBAL_DATA_PTR;
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static void ls_pcie_ep_enable_cfg(struct ls_pcie_ep *pcie_ep)
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{
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	struct ls_pcie *pcie = pcie_ep->pcie;
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	u32 config;
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	config = ctrl_readl(pcie,  PCIE_PF_CONFIG);
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	config |= PCIE_CONFIG_READY;
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	ctrl_writel(pcie, config, PCIE_PF_CONFIG);
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}
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static int ls_ep_set_bar(struct udevice *dev, uint fn, struct pci_bar *ep_bar)
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{
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	struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
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	struct ls_pcie *pcie = pcie_ep->pcie;
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	dma_addr_t bar_phys = ep_bar->phys_addr;
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	enum pci_barno bar = ep_bar->barno;
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	u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
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	int flags = ep_bar->flags;
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	int type, idx;
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	u64 size;
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	idx  = bar;
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	/* BAR size is 2^(aperture + 11) */
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	size = max_t(size_t, ep_bar->size, FSL_PCIE_EP_MIN_APERTURE);
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	if (!(flags & PCI_BASE_ADDRESS_SPACE))
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		type = PCIE_ATU_TYPE_MEM;
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	else
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		type = PCIE_ATU_TYPE_IO;
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	ls_pcie_atu_inbound_set(pcie, fn, 0, type, idx, bar, bar_phys);
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	dbi_writel(pcie, lower_32_bits(size - 1), reg + PCIE_NO_SRIOV_BAR_BASE);
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	dbi_writel(pcie, flags, reg);
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	if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
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		dbi_writel(pcie, upper_32_bits(size - 1),
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			   reg + 4 + PCIE_NO_SRIOV_BAR_BASE);
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		dbi_writel(pcie, 0, reg + 4);
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	}
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	return 0;
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}
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static struct pci_ep_ops ls_pcie_ep_ops = {
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	.set_bar = ls_ep_set_bar,
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};
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static void ls_pcie_ep_setup_atu(struct ls_pcie_ep *pcie_ep, u32 pf)
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{
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	struct ls_pcie *pcie = pcie_ep->pcie;
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	u32 vf_flag = 0;
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	u64 phys = 0;
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	phys = CFG_SYS_PCI_EP_MEMORY_BASE + pf * SZ_64M;
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	phys = ALIGN(phys, PCIE_BAR0_SIZE);
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	/* ATU 0 : INBOUND : map BAR0 */
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	ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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				0 + pf * BAR_NUM, 0, phys);
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	/* ATU 1 : INBOUND : map BAR1 */
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	phys = ALIGN(phys + PCIE_BAR0_SIZE, PCIE_BAR1_SIZE);
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	ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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				1 + pf * BAR_NUM, 1, phys);
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	/* ATU 2 : INBOUND : map BAR2 */
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	phys = ALIGN(phys + PCIE_BAR1_SIZE, PCIE_BAR2_SIZE);
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	ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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				2 + pf * BAR_NUM, 2, phys);
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	/* ATU 3 : INBOUND : map BAR2 */
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	phys = ALIGN(phys + PCIE_BAR2_SIZE, PCIE_BAR4_SIZE);
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	ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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				3 + pf * BAR_NUM, 4, phys);
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	if (pcie_ep->sriov_flag) {
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		vf_flag = 1;
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		/* ATU 4 : INBOUND : map BAR0 */
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		phys = ALIGN(phys + PCIE_BAR4_SIZE, PCIE_BAR0_SIZE);
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		ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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					4 + pf * BAR_NUM, 0, phys);
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		/* ATU 5 : INBOUND : map BAR1 */
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		phys = ALIGN(phys + PCIE_BAR0_SIZE * PCIE_VF_NUM,
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			     PCIE_BAR1_SIZE);
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		ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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					5 + pf * BAR_NUM, 1, phys);
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		/* ATU 6 : INBOUND : map BAR2 */
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		phys = ALIGN(phys + PCIE_BAR1_SIZE * PCIE_VF_NUM,
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			     PCIE_BAR2_SIZE);
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		ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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					6 + pf * BAR_NUM, 2, phys);
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		/* ATU 7 : INBOUND : map BAR4 */
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		phys = ALIGN(phys + PCIE_BAR2_SIZE * PCIE_VF_NUM,
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			     PCIE_BAR4_SIZE);
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		ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
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					7 + pf * BAR_NUM, 4, phys);
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	}
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	/* ATU: OUTBOUND : map MEM */
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	ls_pcie_atu_outbound_set(pcie, pf, PCIE_ATU_TYPE_MEM,
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				 (u64)pcie_ep->addr_res.start +
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				 pf * CFG_SYS_PCI_MEMORY_SIZE,
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				 0, CFG_SYS_PCI_MEMORY_SIZE);
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}
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/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
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static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
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{
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	u32 mask;
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	/* The least inbound window is 4KiB */
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	if (size < SZ_4K)
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		mask = 0;
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	else
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		mask = size - 1;
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	switch (bar) {
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	case 0:
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		writel(mask, bar_base + PCI_BASE_ADDRESS_0);
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		break;
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	case 1:
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		writel(mask, bar_base + PCI_BASE_ADDRESS_1);
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		break;
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	case 2:
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		writel(mask, bar_base + PCI_BASE_ADDRESS_2);
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		writel(0, bar_base + PCI_BASE_ADDRESS_3);
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		break;
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	case 4:
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		writel(mask, bar_base + PCI_BASE_ADDRESS_4);
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		writel(0, bar_base + PCI_BASE_ADDRESS_5);
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		break;
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	default:
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		break;
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	}
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}
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static void ls_pcie_ep_setup_bars(void *bar_base)
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{
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	/* BAR0 - 32bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
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	/* BAR1 - 32bit - MEM*/
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	ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
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	/* BAR2 - 64bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
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	/* BAR4 - 64bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
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}
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static void ls_pcie_ep_setup_vf_bars(void *bar_base)
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{
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	/* VF BAR0 MASK register at offset 0x19c*/
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	bar_base += PCIE_SRIOV_VFBAR0 - PCI_BASE_ADDRESS_0;
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	/* VF-BAR0 - 32bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
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	/* VF-BAR1 - 32bit - MEM*/
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	ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
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	/* VF-BAR2 - 64bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
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	/* VF-BAR4 - 64bit - MEM */
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	ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
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}
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static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep)
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{
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	u32 sriov;
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	u32 pf, vf;
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	void *bar_base = NULL;
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	struct ls_pcie *pcie = pcie_ep->pcie;
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	sriov = readl(pcie->dbi + PCIE_SRIOV);
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	if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
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		pcie_ep->sriov_flag = 1;
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		for (pf = 0; pf < PCIE_PF_NUM; pf++) {
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			/*
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			 * The VF_BARn_REG register's Prefetchable and Type bit
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			 * fields are overwritten by a write to VF's BAR Mask
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			 * register. Before writing to the VF_BARn_MASK_REG
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			 * register, write 0b to the PCIE_MISC_CONTROL_1_OFF
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			 * register.
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			 */
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			writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF);
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			bar_base = pcie->dbi +
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				   PCIE_MASK_OFFSET(pcie_ep->cfg2_flag, pf,
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						    pcie_ep->pf1_offset);
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			if (pcie_ep->cfg2_flag) {
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				ctrl_writel(pcie,
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					    PCIE_LCTRL0_VAL(pf, 0),
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					    PCIE_PF_VF_CTRL);
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				ls_pcie_ep_setup_bars(bar_base);
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				for (vf = 1; vf <= PCIE_VF_NUM; vf++) {
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					ctrl_writel(pcie,
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						    PCIE_LCTRL0_VAL(pf, vf),
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						    PCIE_PF_VF_CTRL);
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					ls_pcie_ep_setup_vf_bars(bar_base);
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				}
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			} else {
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				ls_pcie_ep_setup_bars(bar_base);
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				ls_pcie_ep_setup_vf_bars(bar_base);
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			}
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			ls_pcie_ep_setup_atu(pcie_ep, pf);
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		}
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		if (pcie_ep->cfg2_flag)  /* Disable CFG2 */
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			ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
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	} else {
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		ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
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		ls_pcie_ep_setup_atu(pcie_ep, 0);
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	}
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	ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM_SRIOV,
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			 PCIE_ATU_REGION_INBOUND);
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	ls_pcie_ep_enable_cfg(pcie_ep);
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}
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static int ls_pcie_ep_probe(struct udevice *dev)
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{
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	struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
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	struct ls_pcie *pcie;
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	u16 link_sta;
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	int ret;
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	u32 svr;
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	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
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	if (!pcie)
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		return -ENOMEM;
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	pcie_ep->pcie = pcie;
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	pcie->dbi = devfdt_get_addr_index_ptr(dev, 0);
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	if (!pcie->dbi)
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		return -EINVAL;
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	pcie->ctrl = devfdt_get_addr_index_ptr(dev, 1);
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	if (!pcie->ctrl)
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		return -EINVAL;
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	ret = fdt_get_named_resource(gd->fdt_blob, dev_of_offset(dev),
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				     "reg", "reg-names",
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				     "addr_space", &pcie_ep->addr_res);
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	if (ret) {
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		printf("%s: resource \"addr_space\" not found\n", dev->name);
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		return ret;
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	}
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	pcie->idx = ((unsigned long)pcie->dbi - PCIE_SYS_BASE_ADDR) /
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		    PCIE_CCSR_SIZE;
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	/* This controller is disabled by RCW */
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	if (!is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)))
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		return 0;
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	pcie->big_endian = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
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					   "big-endian");
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	svr = SVR_SOC_VER(get_svr());
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	if (svr == SVR_LX2160A || svr == SVR_LX2162A ||
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	    svr == SVR_LX2120A || svr == SVR_LX2080A ||
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	    svr == SVR_LX2122A || svr == SVR_LX2082A)
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		pcie_ep->pf1_offset = LX2160_PCIE_PF1_OFFSET;
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	else
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		pcie_ep->pf1_offset = LS_PCIE_PF1_OFFSET;
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	if (svr == SVR_LS2080A || svr == SVR_LS2085A)
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		pcie_ep->cfg2_flag = 1;
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	else
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		pcie_ep->cfg2_flag = 0;
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	pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f;
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	if (pcie->mode != PCI_HEADER_TYPE_NORMAL)
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		return 0;
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	pcie_ep->max_functions = fdtdec_get_int(gd->fdt_blob,
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						dev_of_offset(dev),
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						"max-functions", 1);
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	pcie_ep->num_ib_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
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					      "num-ib-windows", 8);
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	pcie_ep->num_ob_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
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					      "num-ob-windows", 8);
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	printf("PCIe%u: %s %s", PCIE_SRDS_PRTCL(pcie->idx), dev->name,
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	       "Endpoint");
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	ls_pcie_setup_ep(pcie_ep);
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	if (!ls_pcie_link_up(pcie)) {
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		/* Let the user know there's no PCIe link */
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		printf(": no link\n");
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		return 0;
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	}
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	/* Print the negotiated PCIe link width */
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	link_sta = readw(pcie->dbi + PCIE_LINK_STA);
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	printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4,
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	       link_sta & PCIE_LINK_SPEED_MASK);
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	return 0;
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}
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static int ls_pcie_ep_remove(struct udevice *dev)
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{
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	return 0;
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}
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const struct udevice_id ls_pcie_ep_ids[] = {
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	{ .compatible = "fsl,ls-pcie-ep" },
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	{ }
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};
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U_BOOT_DRIVER(pci_layerscape_ep) = {
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	.name = "pci_layerscape_ep",
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	.id	= UCLASS_PCI_EP,
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	.of_match = ls_pcie_ep_ids,
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	.ops = &ls_pcie_ep_ops,
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	.probe = ls_pcie_ep_probe,
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	.remove = ls_pcie_ep_remove,
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	.priv_auto	= sizeof(struct ls_pcie_ep),
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};
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