226 lines
6.5 KiB
C
226 lines
6.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* PCIe host controller driver for Mobiveil PCIe Host controller
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*
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* Copyright (c) 2018 Mobiveil Inc.
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* Copyright 2019 NXP
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*
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* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
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* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
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*/
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#ifndef _PCIE_MOBIVEIL_H
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#define _PCIE_MOBIVEIL_H
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#include <linux/pci.h>
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#include <linux/irq.h>
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#include <linux/msi.h>
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#include "../../pci.h"
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/* register offsets and bit positions */
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/*
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* translation tables are grouped into windows, each window registers are
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* grouped into blocks of 4 or 16 registers each
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*/
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#define PAB_REG_BLOCK_SIZE 16
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#define PAB_EXT_REG_BLOCK_SIZE 4
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#define PAB_REG_ADDR(offset, win) \
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(offset + (win * PAB_REG_BLOCK_SIZE))
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#define PAB_EXT_REG_ADDR(offset, win) \
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(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
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#define LTSSM_STATUS 0x0404
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#define LTSSM_STATUS_L0_MASK 0x3f
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#define LTSSM_STATUS_L0 0x2d
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#define PAB_CTRL 0x0808
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#define AMBA_PIO_ENABLE_SHIFT 0
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#define PEX_PIO_ENABLE_SHIFT 1
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#define PAGE_SEL_SHIFT 13
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#define PAGE_SEL_MASK 0x3f
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#define PAGE_LO_MASK 0x3ff
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#define PAGE_SEL_OFFSET_SHIFT 10
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#define PAB_ACTIVITY_STAT 0x81c
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#define PAB_AXI_PIO_CTRL 0x0840
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#define APIO_EN_MASK 0xf
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#define PAB_PEX_PIO_CTRL 0x08c0
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#define PIO_ENABLE_SHIFT 0
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#define PAB_INTP_AMBA_MISC_ENB 0x0b0c
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#define PAB_INTP_AMBA_MISC_STAT 0x0b1c
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#define PAB_INTP_RESET BIT(1)
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#define PAB_INTP_MSI BIT(3)
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#define PAB_INTP_INTA BIT(5)
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#define PAB_INTP_INTB BIT(6)
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#define PAB_INTP_INTC BIT(7)
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#define PAB_INTP_INTD BIT(8)
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#define PAB_INTP_PCIE_UE BIT(9)
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#define PAB_INTP_IE_PMREDI BIT(29)
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#define PAB_INTP_IE_EC BIT(30)
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#define PAB_INTP_MSI_MASK PAB_INTP_MSI
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#define PAB_INTP_INTX_MASK (PAB_INTP_INTA | PAB_INTP_INTB |\
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PAB_INTP_INTC | PAB_INTP_INTD)
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#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win)
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#define WIN_ENABLE_SHIFT 0
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#define WIN_TYPE_SHIFT 1
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#define WIN_TYPE_MASK 0x3
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#define WIN_SIZE_MASK 0xfffffc00
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#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
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#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
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#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
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#define AXI_WINDOW_ALIGN_MASK 3
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#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win)
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#define PAB_BUS_SHIFT 24
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#define PAB_DEVICE_SHIFT 19
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#define PAB_FUNCTION_SHIFT 16
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#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win)
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#define PAB_INTP_AXI_PIO_CLASS 0x474
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#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win)
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#define AMAP_CTRL_EN_SHIFT 0
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#define AMAP_CTRL_TYPE_SHIFT 1
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#define AMAP_CTRL_TYPE_MASK 3
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#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
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#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
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#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
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#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
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#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win)
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/* starting offset of INTX bits in status register */
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#define PAB_INTX_START 5
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/* supported number of MSI interrupts */
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#define PCI_NUM_MSI 16
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/* MSI registers */
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#define MSI_BASE_LO_OFFSET 0x04
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#define MSI_BASE_HI_OFFSET 0x08
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#define MSI_SIZE_OFFSET 0x0c
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#define MSI_ENABLE_OFFSET 0x14
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#define MSI_STATUS_OFFSET 0x18
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#define MSI_DATA_OFFSET 0x20
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#define MSI_ADDR_L_OFFSET 0x24
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#define MSI_ADDR_H_OFFSET 0x28
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/* outbound and inbound window definitions */
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#define WIN_NUM_0 0
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#define WIN_NUM_1 1
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#define CFG_WINDOW_TYPE 0
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#define IO_WINDOW_TYPE 1
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#define MEM_WINDOW_TYPE 2
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#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024)
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#define MAX_PIO_WINDOWS 8
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/* Parameters for the waiting for link up routine */
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#define LINK_WAIT_MAX_RETRIES 10
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#define LINK_WAIT_MIN 90000
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#define LINK_WAIT_MAX 100000
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#define PAGED_ADDR_BNDRY 0xc00
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#define OFFSET_TO_PAGE_ADDR(off) \
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((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
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#define OFFSET_TO_PAGE_IDX(off) \
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((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
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struct mobiveil_msi { /* MSI information */
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struct mutex lock; /* protect bitmap variable */
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struct irq_domain *msi_domain;
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struct irq_domain *dev_domain;
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phys_addr_t msi_pages_phys;
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int num_of_vectors;
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DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
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};
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struct mobiveil_pcie;
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struct mobiveil_rp_ops {
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int (*interrupt_init)(struct mobiveil_pcie *pcie);
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};
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struct mobiveil_root_port {
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void __iomem *config_axi_slave_base; /* endpoint config base */
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struct resource *ob_io_res;
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struct mobiveil_rp_ops *ops;
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int irq;
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raw_spinlock_t intx_mask_lock;
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struct irq_domain *intx_domain;
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struct mobiveil_msi msi;
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struct pci_host_bridge *bridge;
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};
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struct mobiveil_pab_ops {
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int (*link_up)(struct mobiveil_pcie *pcie);
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};
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struct mobiveil_pcie {
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struct platform_device *pdev;
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void __iomem *csr_axi_slave_base; /* root port config base */
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void __iomem *apb_csr_base; /* MSI register base */
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phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
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int apio_wins;
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int ppio_wins;
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int ob_wins_configured; /* configured outbound windows */
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int ib_wins_configured; /* configured inbound windows */
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const struct mobiveil_pab_ops *ops;
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struct mobiveil_root_port rp;
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};
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int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
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int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
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bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
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int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
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void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
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u64 pci_addr, u32 type, u64 size);
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void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
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u64 pci_addr, u32 type, u64 size);
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u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
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void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
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size_t size);
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static inline u32 mobiveil_csr_readl(struct mobiveil_pcie *pcie, u32 off)
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{
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return mobiveil_csr_read(pcie, off, 0x4);
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}
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static inline u16 mobiveil_csr_readw(struct mobiveil_pcie *pcie, u32 off)
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{
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return mobiveil_csr_read(pcie, off, 0x2);
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}
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static inline u8 mobiveil_csr_readb(struct mobiveil_pcie *pcie, u32 off)
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{
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return mobiveil_csr_read(pcie, off, 0x1);
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}
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static inline void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val,
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u32 off)
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{
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mobiveil_csr_write(pcie, val, off, 0x4);
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}
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static inline void mobiveil_csr_writew(struct mobiveil_pcie *pcie, u16 val,
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u32 off)
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{
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mobiveil_csr_write(pcie, val, off, 0x2);
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}
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static inline void mobiveil_csr_writeb(struct mobiveil_pcie *pcie, u8 val,
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u32 off)
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{
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mobiveil_csr_write(pcie, val, off, 0x1);
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}
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#endif /* _PCIE_MOBIVEIL_H */
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