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https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
264 lines
7.7 KiB
C
264 lines
7.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Renesas RCar Gen2 PCIEC driver
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*
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* Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <clk.h>
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#include <dm.h>
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#include <errno.h>
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#include <pci.h>
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/* AHB-PCI Bridge PCI communication registers */
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#define RCAR_AHBPCI_PCICOM_OFFSET 0x800
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#define RCAR_PCIAHB_WIN1_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x00)
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#define RCAR_PCIAHB_WIN2_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x04)
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#define RCAR_PCIAHB_PREFETCH0 0x0
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#define RCAR_PCIAHB_PREFETCH4 0x1
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#define RCAR_PCIAHB_PREFETCH8 0x2
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#define RCAR_PCIAHB_PREFETCH16 0x3
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#define RCAR_AHBPCI_WIN1_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x10)
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#define RCAR_AHBPCI_WIN2_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x14)
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#define RCAR_AHBPCI_WIN_CTR_MEM (3 << 1)
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#define RCAR_AHBPCI_WIN_CTR_CFG (5 << 1)
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#define RCAR_AHBPCI_WIN1_HOST BIT(30)
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#define RCAR_AHBPCI_WIN1_DEVICE BIT(31)
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#define RCAR_PCI_INT_ENABLE_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x20)
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#define RCAR_PCI_INT_STATUS_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x24)
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#define RCAR_PCI_INT_SIGTABORT BIT(0)
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#define RCAR_PCI_INT_SIGRETABORT BIT(1)
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#define RCAR_PCI_INT_REMABORT BIT(2)
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#define RCAR_PCI_INT_PERR BIT(3)
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#define RCAR_PCI_INT_SIGSERR BIT(4)
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#define RCAR_PCI_INT_RESERR BIT(5)
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#define RCAR_PCI_INT_WIN1ERR BIT(12)
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#define RCAR_PCI_INT_WIN2ERR BIT(13)
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#define RCAR_PCI_INT_A BIT(16)
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#define RCAR_PCI_INT_B BIT(17)
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#define RCAR_PCI_INT_PME BIT(19)
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#define RCAR_PCI_INT_ALLERRORS (RCAR_PCI_INT_SIGTABORT | \
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RCAR_PCI_INT_SIGRETABORT | \
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RCAR_PCI_INT_SIGRETABORT | \
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RCAR_PCI_INT_REMABORT | \
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RCAR_PCI_INT_PERR | \
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RCAR_PCI_INT_SIGSERR | \
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RCAR_PCI_INT_RESERR | \
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RCAR_PCI_INT_WIN1ERR | \
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RCAR_PCI_INT_WIN2ERR)
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#define RCAR_AHB_BUS_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x30)
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#define RCAR_AHB_BUS_MMODE_HTRANS BIT(0)
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#define RCAR_AHB_BUS_MMODE_BYTE_BURST BIT(1)
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#define RCAR_AHB_BUS_MMODE_WR_INCR BIT(2)
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#define RCAR_AHB_BUS_MMODE_HBUS_REQ BIT(7)
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#define RCAR_AHB_BUS_SMODE_READYCTR BIT(17)
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#define RCAR_AHB_BUS_MODE (RCAR_AHB_BUS_MMODE_HTRANS | \
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RCAR_AHB_BUS_MMODE_BYTE_BURST | \
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RCAR_AHB_BUS_MMODE_WR_INCR | \
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RCAR_AHB_BUS_MMODE_HBUS_REQ | \
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RCAR_AHB_BUS_SMODE_READYCTR)
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#define RCAR_USBCTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x34)
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#define RCAR_USBCTR_USBH_RST BIT(0)
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#define RCAR_USBCTR_PCICLK_MASK BIT(1)
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#define RCAR_USBCTR_PLL_RST BIT(2)
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#define RCAR_USBCTR_DIRPD BIT(8)
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#define RCAR_USBCTR_PCIAHB_WIN2_EN BIT(9)
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#define RCAR_USBCTR_PCIAHB_WIN1_256M (0 << 10)
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#define RCAR_USBCTR_PCIAHB_WIN1_512M (1 << 10)
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#define RCAR_USBCTR_PCIAHB_WIN1_1G (2 << 10)
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#define RCAR_USBCTR_PCIAHB_WIN1_2G (3 << 10)
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#define RCAR_USBCTR_PCIAHB_WIN1_MASK (3 << 10)
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#define RCAR_PCI_ARBITER_CTR_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x40)
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#define RCAR_PCI_ARBITER_PCIREQ0 BIT(0)
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#define RCAR_PCI_ARBITER_PCIREQ1 BIT(1)
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#define RCAR_PCI_ARBITER_PCIBP_MODE BIT(12)
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#define RCAR_PCI_UNIT_REV_REG (RCAR_AHBPCI_PCICOM_OFFSET + 0x48)
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struct rcar_gen2_pci_priv {
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fdt_addr_t cfg_base;
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fdt_addr_t mem_base;
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};
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static int rcar_gen2_pci_addr_valid(pci_dev_t d, uint offset)
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{
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u32 slot;
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if (PCI_FUNC(d))
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return -EINVAL;
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/* Only one EHCI/OHCI device built-in */
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slot = PCI_DEV(d);
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if (slot > 2)
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return -EINVAL;
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/* bridge logic only has registers to 0x40 */
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if (slot == 0x0 && offset >= 0x40)
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return -EINVAL;
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return 0;
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}
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static u32 get_bus_address(struct udevice *dev, pci_dev_t bdf, u32 offset)
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{
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struct rcar_gen2_pci_priv *priv = dev_get_priv(dev);
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return priv->cfg_base + (PCI_DEV(bdf) >> 1) * 0x100 + (offset & ~3);
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}
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static u32 setup_bus_address(struct udevice *dev, pci_dev_t bdf, u32 offset)
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{
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struct rcar_gen2_pci_priv *priv = dev_get_priv(dev);
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u32 reg;
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reg = PCI_DEV(bdf) ? RCAR_AHBPCI_WIN1_DEVICE : RCAR_AHBPCI_WIN1_HOST;
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reg |= RCAR_AHBPCI_WIN_CTR_CFG;
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writel(reg, priv->cfg_base + RCAR_AHBPCI_WIN1_CTR_REG);
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return get_bus_address(dev, bdf, offset);
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}
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static int rcar_gen2_pci_read_config(struct udevice *dev, pci_dev_t bdf,
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uint offset, ulong *value,
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enum pci_size_t size)
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{
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u32 addr, reg;
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int ret;
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ret = rcar_gen2_pci_addr_valid(bdf, offset);
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if (ret) {
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*value = pci_get_ff(size);
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return 0;
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}
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addr = get_bus_address(dev, bdf, offset);
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reg = readl(addr);
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*value = pci_conv_32_to_size(reg, offset, size);
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return 0;
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}
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static int rcar_gen2_pci_write_config(struct udevice *dev, pci_dev_t bdf,
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uint offset, ulong value,
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enum pci_size_t size)
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{
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u32 addr, reg, old;
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int ret;
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ret = rcar_gen2_pci_addr_valid(bdf, offset);
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if (ret)
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return ret;
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addr = get_bus_address(dev, bdf, offset);
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old = readl(addr);
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reg = pci_conv_size_to_32(old, value, offset, size);
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writel(reg, addr);
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return 0;
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}
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static int rcar_gen2_pci_probe(struct udevice *dev)
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{
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struct rcar_gen2_pci_priv *priv = dev_get_priv(dev);
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struct clk pci_clk;
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u32 devad;
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int ret;
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ret = clk_get_by_index(dev, 0, &pci_clk);
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if (ret)
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return ret;
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ret = clk_enable(&pci_clk);
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if (ret)
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return ret;
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/* Clock & Reset & Direct Power Down */
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clrsetbits_le32(priv->cfg_base + RCAR_USBCTR_REG,
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RCAR_USBCTR_DIRPD | RCAR_USBCTR_PCICLK_MASK |
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RCAR_USBCTR_USBH_RST,
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RCAR_USBCTR_PCIAHB_WIN1_1G);
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clrbits_le32(priv->cfg_base + RCAR_USBCTR_REG, RCAR_USBCTR_PLL_RST);
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/* AHB-PCI Bridge Communication Registers */
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writel(RCAR_AHB_BUS_MODE, priv->cfg_base + RCAR_AHB_BUS_CTR_REG);
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writel((CONFIG_SYS_SDRAM_BASE & 0xf0000000) | RCAR_PCIAHB_PREFETCH16,
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priv->cfg_base + RCAR_PCIAHB_WIN1_CTR_REG);
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writel(0xf0000000 | RCAR_PCIAHB_PREFETCH16,
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priv->cfg_base + RCAR_PCIAHB_WIN2_CTR_REG);
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writel(priv->mem_base | RCAR_AHBPCI_WIN_CTR_MEM,
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priv->cfg_base + RCAR_AHBPCI_WIN2_CTR_REG);
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setbits_le32(priv->cfg_base + RCAR_PCI_ARBITER_CTR_REG,
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RCAR_PCI_ARBITER_PCIREQ0 | RCAR_PCI_ARBITER_PCIREQ1 |
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RCAR_PCI_ARBITER_PCIBP_MODE);
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/* PCI Configuration Registers for AHBPCI */
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devad = setup_bus_address(dev, PCI_BDF(0, 0, 0), 0);
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writel(priv->cfg_base + 0x800, devad + PCI_BASE_ADDRESS_0);
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writel(CONFIG_SYS_SDRAM_BASE & 0xf0000000, devad + PCI_BASE_ADDRESS_1);
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writel(0xf0000000, devad + PCI_BASE_ADDRESS_2);
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writel(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
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PCI_COMMAND_PARITY | PCI_COMMAND_SERR,
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devad + PCI_COMMAND);
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/* PCI Configuration Registers for OHCI */
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devad = setup_bus_address(dev, PCI_BDF(0, 1, 0), 0);
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writel(priv->mem_base + 0x0, devad + PCI_BASE_ADDRESS_0);
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writel(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
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PCI_COMMAND_PARITY | PCI_COMMAND_SERR,
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devad + PCI_COMMAND);
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/* PCI Configuration Registers for EHCI */
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devad = setup_bus_address(dev, PCI_BDF(0, 2, 0), 0);
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writel(priv->mem_base + 0x1000, devad + PCI_BASE_ADDRESS_0);
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writel(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
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PCI_COMMAND_PARITY | PCI_COMMAND_SERR,
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devad + PCI_COMMAND);
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/* Enable PCI interrupt */
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setbits_le32(priv->cfg_base + RCAR_PCI_INT_ENABLE_REG,
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RCAR_PCI_INT_A | RCAR_PCI_INT_B | RCAR_PCI_INT_PME);
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return 0;
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}
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static int rcar_gen2_pci_ofdata_to_platdata(struct udevice *dev)
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{
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struct rcar_gen2_pci_priv *priv = dev_get_priv(dev);
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priv->cfg_base = devfdt_get_addr_index(dev, 0);
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priv->mem_base = devfdt_get_addr_index(dev, 1);
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if (!priv->cfg_base || !priv->mem_base)
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return -EINVAL;
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return 0;
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}
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static const struct dm_pci_ops rcar_gen2_pci_ops = {
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.read_config = rcar_gen2_pci_read_config,
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.write_config = rcar_gen2_pci_write_config,
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};
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static const struct udevice_id rcar_gen2_pci_ids[] = {
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{ .compatible = "renesas,pci-rcar-gen2" },
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{ }
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};
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U_BOOT_DRIVER(rcar_gen2_pci) = {
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.name = "rcar_gen2_pci",
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.id = UCLASS_PCI,
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.of_match = rcar_gen2_pci_ids,
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.ops = &rcar_gen2_pci_ops,
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.probe = rcar_gen2_pci_probe,
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.ofdata_to_platdata = rcar_gen2_pci_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct rcar_gen2_pci_priv),
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};
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