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Diffstat (limited to 'drivers/pci/controller/mobiveil/pcie-mobiveil.h')
-rw-r--r--drivers/pci/controller/mobiveil/pcie-mobiveil.h225
1 files changed, 225 insertions, 0 deletions
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
new file mode 100644
index 000000000..6082b8afb
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -0,0 +1,225 @@
+/* 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;
+ 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 */