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