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4c56d75117
The 4.6 spec added an upper 32bits to the ATU limit, and since this driver is already assuming the unrolled feature added in the 4.8 specification this really should be set. This is causing a bug with testing against the QEMU model as it defaults the viewports to fully open and not setting this causes the config viewport to become most of memory (obviously stopping the emulated system working correctly) Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
156 lines
5.1 KiB
C
156 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2021 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*
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* Copyright (c) 2021 Rockchip, Inc.
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*
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* Copyright (C) 2018 Texas Instruments, Inc
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*/
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#ifndef PCIE_DW_COMMON_H
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#define PCIE_DW_COMMON_H
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#define DEFAULT_DBI_ATU_OFFSET (0x3 << 20)
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/* PCI DBICS registers */
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#define PCIE_LINK_STATUS_REG 0x80
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#define PCIE_LINK_STATUS_SPEED_OFF 16
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#define PCIE_LINK_STATUS_SPEED_MASK (0xf << PCIE_LINK_STATUS_SPEED_OFF)
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#define PCIE_LINK_STATUS_WIDTH_OFF 20
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#define PCIE_LINK_STATUS_WIDTH_MASK (0xf << PCIE_LINK_STATUS_WIDTH_OFF)
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/*
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* iATU Unroll-specific register definitions
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* From 4.80 core version the address translation will be made by unroll.
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* The registers are offset from atu_base
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*/
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#define PCIE_ATU_UNR_REGION_CTRL1 0x00
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#define PCIE_ATU_UNR_REGION_CTRL2 0x04
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#define PCIE_ATU_UNR_LOWER_BASE 0x08
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#define PCIE_ATU_UNR_UPPER_BASE 0x0c
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#define PCIE_ATU_UNR_LIMIT 0x10
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#define PCIE_ATU_UNR_LOWER_TARGET 0x14
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#define PCIE_ATU_UNR_UPPER_TARGET 0x18
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#define PCIE_ATU_UNR_UPPER_LIMIT 0x20
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#define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
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#define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
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#define PCIE_ATU_TYPE_MEM (0x0 << 0)
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#define PCIE_ATU_TYPE_IO (0x2 << 0)
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#define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
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#define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
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#define PCIE_ATU_ENABLE (0x1 << 31)
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#define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
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#define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
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#define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
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#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
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/* Register address builder */
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#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) ((region) << 9)
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/* Parameters for the waiting for iATU enabled routine */
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#define LINK_WAIT_MAX_IATU_RETRIES 5
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#define LINK_WAIT_IATU_US 10000
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/* PCI DBICS registers */
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#define PCIE_LINK_STATUS_REG 0x80
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#define PCIE_LINK_STATUS_SPEED_OFF 16
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#define PCIE_LINK_STATUS_SPEED_MASK (0xf << PCIE_LINK_STATUS_SPEED_OFF)
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#define PCIE_LINK_STATUS_WIDTH_OFF 20
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#define PCIE_LINK_STATUS_WIDTH_MASK (0xf << PCIE_LINK_STATUS_WIDTH_OFF)
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#define PCIE_LINK_CAPABILITY 0x7c
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#define PCIE_LINK_CTL_2 0xa0
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#define TARGET_LINK_SPEED_MASK 0xf
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#define LINK_SPEED_GEN_1 0x1
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#define LINK_SPEED_GEN_2 0x2
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#define LINK_SPEED_GEN_3 0x3
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/* Synopsys-specific PCIe configuration registers */
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#define PCIE_PORT_LINK_CONTROL 0x710
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#define PORT_LINK_DLL_LINK_EN BIT(5)
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#define PORT_LINK_FAST_LINK_MODE BIT(7)
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#define PORT_LINK_MODE_MASK GENMASK(21, 16)
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#define PORT_LINK_MODE(n) FIELD_PREP(PORT_LINK_MODE_MASK, n)
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#define PORT_LINK_MODE_1_LANES PORT_LINK_MODE(0x1)
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#define PORT_LINK_MODE_2_LANES PORT_LINK_MODE(0x3)
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#define PORT_LINK_MODE_4_LANES PORT_LINK_MODE(0x7)
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#define PORT_LINK_MODE_8_LANES PORT_LINK_MODE(0xf)
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#define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
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#define PORT_LOGIC_N_FTS_MASK GENMASK(7, 0)
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#define PORT_LOGIC_SPEED_CHANGE BIT(17)
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#define PORT_LOGIC_LINK_WIDTH_MASK GENMASK(12, 8)
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#define PORT_LOGIC_LINK_WIDTH(n) FIELD_PREP(PORT_LOGIC_LINK_WIDTH_MASK, n)
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#define PORT_LOGIC_LINK_WIDTH_1_LANES PORT_LOGIC_LINK_WIDTH(0x1)
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#define PORT_LOGIC_LINK_WIDTH_2_LANES PORT_LOGIC_LINK_WIDTH(0x2)
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#define PORT_LOGIC_LINK_WIDTH_4_LANES PORT_LOGIC_LINK_WIDTH(0x4)
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#define PORT_LOGIC_LINK_WIDTH_8_LANES PORT_LOGIC_LINK_WIDTH(0x8)
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#define PCIE_MISC_CONTROL_1_OFF 0x8bc
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#define PCIE_DBI_RO_WR_EN BIT(0)
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/* Parameters for the waiting for iATU enabled routine */
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#define LINK_WAIT_MAX_IATU_RETRIES 5
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#define LINK_WAIT_IATU 10000
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/**
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* struct pcie_dw - DW PCIe controller state
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*
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* @dbi_base: The base address of dbi register space
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* @cfg_base: The base address of configuration space
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* @atu_base: The base address of ATU space
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* @cfg_size: The size of the configuration space which is needed
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* as it gets written into the PCIE_ATU_LIMIT register
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* @first_busno: This driver supports multiple PCIe controllers.
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* first_busno stores the bus number of the PCIe root-port
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* number which may vary depending on the PCIe setup
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* (PEX switches etc).
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* @io: The IO space for EP's BAR
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* @mem: The memory space for EP's BAR
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* @prefetch: The prefetch space for EP's BAR
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*/
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struct pcie_dw {
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struct udevice *dev;
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void __iomem *dbi_base;
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void __iomem *cfg_base;
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void __iomem *atu_base;
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fdt_size_t cfg_size;
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int first_busno;
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/* IO, MEM & PREFETCH PCI regions */
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struct pci_region io;
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struct pci_region mem;
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struct pci_region prefetch;
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};
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int pcie_dw_get_link_speed(struct pcie_dw *pci);
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int pcie_dw_get_link_width(struct pcie_dw *pci);
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int pcie_dw_prog_outbound_atu_unroll(struct pcie_dw *pci, int index, int type, u64 cpu_addr,
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u64 pci_addr, u32 size);
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int pcie_dw_read_config(const struct udevice *bus, pci_dev_t bdf, uint offset, ulong *valuep,
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enum pci_size_t size);
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int pcie_dw_write_config(struct udevice *bus, pci_dev_t bdf, uint offset, ulong value,
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enum pci_size_t size);
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static inline void dw_pcie_dbi_write_enable(struct pcie_dw *pci, bool en)
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{
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u32 val;
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val = readl(pci->dbi_base + PCIE_MISC_CONTROL_1_OFF);
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if (en)
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val |= PCIE_DBI_RO_WR_EN;
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else
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val &= ~PCIE_DBI_RO_WR_EN;
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writel(val, pci->dbi_base + PCIE_MISC_CONTROL_1_OFF);
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}
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void pcie_dw_setup_host(struct pcie_dw *pci);
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#endif
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