drivers/pci/host/pci-keystone.h

   1 /*
   2  * Keystone PCI Controller's common includes
   3  *
   4  * Copyright (C) 2013-2014 Texas Instruments., Ltd.
   5  *              http://www.ti.com
   6  *
   7  * Author: Murali Karicheri <m-karicheri2@ti.com>
   8  *
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #define MAX_LEGACY_IRQS                 4
  16 #define MAX_MSI_HOST_IRQS               8
  17 #define MAX_LEGACY_HOST_IRQS            4
  18
  19 struct keystone_pcie {
  20         struct  pcie_port       pp;             /* pp.dbi_base is DT 0th res */
  21         struct  clk             *clk;
  22         /* PCI Device ID */
  23         u32                     device_id;
  24         int                     num_legacy_host_irqs;
  25         int                     legacy_host_irqs[MAX_LEGACY_HOST_IRQS];
  26         struct                  device_node *legacy_intc_np;
  27
  28         int                     num_msi_host_irqs;
  29         int                     msi_host_irqs[MAX_MSI_HOST_IRQS];
  30         struct                  device_node *msi_intc_np;
  31         struct irq_domain       *legacy_irq_domain;
  32         struct device_node      *np;
  33
  34         int error_irq;
  35
  36         /* Application register space */
  37         void __iomem            *va_app_base;   /* DT 1st resource */
  38         struct resource         app;
  39 };
  40
  41 /* Keystone DW specific MSI controller APIs/definitions */
  42 void ks_dw_pcie_handle_msi_irq(struct keystone_pcie *ks_pcie, int offset);
  43 phys_addr_t ks_dw_pcie_get_msi_addr(struct pcie_port *pp);
  44
  45 /* Keystone specific PCI controller APIs */
  46 void ks_dw_pcie_enable_legacy_irqs(struct keystone_pcie *ks_pcie);
  47 void ks_dw_pcie_handle_legacy_irq(struct keystone_pcie *ks_pcie, int offset);
  48 void ks_dw_pcie_enable_error_irq(struct keystone_pcie *ks_pcie);
  49 irqreturn_t ks_dw_pcie_handle_error_irq(struct keystone_pcie *ks_pcie);
  50 int  ks_dw_pcie_host_init(struct keystone_pcie *ks_pcie,
  51                         struct device_node *msi_intc_np);
  52 int ks_dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
  53                 unsigned int devfn, int where, int size, u32 val);
  54 int ks_dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
  55                 unsigned int devfn, int where, int size, u32 *val);
  56 void ks_dw_pcie_setup_rc_app_regs(struct keystone_pcie *ks_pcie);
  57 int ks_dw_pcie_link_up(struct pcie_port *pp);
  58 void ks_dw_pcie_initiate_link_train(struct keystone_pcie *ks_pcie);
  59 void ks_dw_pcie_msi_set_irq(struct pcie_port *pp, int irq);
  60 void ks_dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq);
  61 void ks_dw_pcie_v3_65_scan_bus(struct pcie_port *pp);
  62 int ks_dw_pcie_msi_host_init(struct pcie_port *pp,
  63                 struct msi_controller *chip);