drivers/pci/dwc/pcie-designware.h

/*
 * Synopsys Designware PCIe host controller driver
 *
 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * Author: Jingoo Han <jg1.han@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _PCIE_DESIGNWARE_H
#define _PCIE_DESIGNWARE_H

#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/pci.h>

/* Parameters for the waiting for link up routine */
#define LINK_WAIT_MAX_RETRIES		10
#define LINK_WAIT_USLEEP_MIN		90000
#define LINK_WAIT_USLEEP_MAX		100000

/* Parameters for the waiting for iATU enabled routine */
#define LINK_WAIT_MAX_IATU_RETRIES	5
#define LINK_WAIT_IATU_MIN		9000
#define LINK_WAIT_IATU_MAX		10000

/* Synopsys-specific PCIe configuration registers */
#define PCIE_PORT_LINK_CONTROL		0x710
#define PORT_LINK_MODE_MASK		(0x3f << 16)
#define PORT_LINK_MODE_1_LANES		(0x1 << 16)
#define PORT_LINK_MODE_2_LANES		(0x3 << 16)
#define PORT_LINK_MODE_4_LANES		(0x7 << 16)
#define PORT_LINK_MODE_8_LANES		(0xf << 16)

#define PCIE_LINK_WIDTH_SPEED_CONTROL	0x80C
#define PORT_LOGIC_SPEED_CHANGE		(0x1 << 17)
#define PORT_LOGIC_LINK_WIDTH_MASK	(0x1f << 8)
#define PORT_LOGIC_LINK_WIDTH_1_LANES	(0x1 << 8)
#define PORT_LOGIC_LINK_WIDTH_2_LANES	(0x2 << 8)
#define PORT_LOGIC_LINK_WIDTH_4_LANES	(0x4 << 8)
#define PORT_LOGIC_LINK_WIDTH_8_LANES	(0x8 << 8)

#define PCIE_MSI_ADDR_LO		0x820
#define PCIE_MSI_ADDR_HI		0x824
#define PCIE_MSI_INTR0_ENABLE		0x828
#define PCIE_MSI_INTR0_MASK		0x82C
#define PCIE_MSI_INTR0_STATUS		0x830

#define PCIE_ATU_VIEWPORT		0x900
#define PCIE_ATU_REGION_INBOUND		(0x1 << 31)
#define PCIE_ATU_REGION_OUTBOUND	(0x0 << 31)
#define PCIE_ATU_REGION_INDEX2		(0x2 << 0)
#define PCIE_ATU_REGION_INDEX1		(0x1 << 0)
#define PCIE_ATU_REGION_INDEX0		(0x0 << 0)
#define PCIE_ATU_CR1			0x904
#define PCIE_ATU_TYPE_MEM		(0x0 << 0)
#define PCIE_ATU_TYPE_IO		(0x2 << 0)
#define PCIE_ATU_TYPE_CFG0		(0x4 << 0)
#define PCIE_ATU_TYPE_CFG1		(0x5 << 0)
#define PCIE_ATU_CR2			0x908
#define PCIE_ATU_ENABLE			(0x1 << 31)
#define PCIE_ATU_BAR_MODE_ENABLE	(0x1 << 30)
#define PCIE_ATU_LOWER_BASE		0x90C
#define PCIE_ATU_UPPER_BASE		0x910
#define PCIE_ATU_LIMIT			0x914
#define PCIE_ATU_LOWER_TARGET		0x918
#define PCIE_ATU_BUS(x)			(((x) & 0xff) << 24)
#define PCIE_ATU_DEV(x)			(((x) & 0x1f) << 19)
#define PCIE_ATU_FUNC(x)		(((x) & 0x7) << 16)
#define PCIE_ATU_UPPER_TARGET		0x91C

/*
 * iATU Unroll-specific register definitions
 * From 4.80 core version the address translation will be made by unroll
 */
#define PCIE_ATU_UNR_REGION_CTRL1	0x00
#define PCIE_ATU_UNR_REGION_CTRL2	0x04
#define PCIE_ATU_UNR_LOWER_BASE		0x08
#define PCIE_ATU_UNR_UPPER_BASE		0x0C
#define PCIE_ATU_UNR_LIMIT		0x10
#define PCIE_ATU_UNR_LOWER_TARGET	0x14
#define PCIE_ATU_UNR_UPPER_TARGET	0x18

/* Register address builder */
#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region)	\
			((0x3 << 20) | ((region) << 9))

/*
 * Maximum number of MSI IRQs can be 256 per controller. But keep
 * it 32 as of now. Probably we will never need more than 32. If needed,
 * then increment it in multiple of 32.
 */
#define MAX_MSI_IRQS			32
#define MAX_MSI_CTRLS			(MAX_MSI_IRQS / 32)

struct pcie_port;
struct dw_pcie;

struct dw_pcie_host_ops {
	int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
	int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
	int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
			     unsigned int devfn, int where, int size, u32 *val);
	int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
			     unsigned int devfn, int where, int size, u32 val);
	void (*host_init)(struct pcie_port *pp);
	void (*msi_set_irq)(struct pcie_port *pp, int irq);
	void (*msi_clear_irq)(struct pcie_port *pp, int irq);
	phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
	u32 (*get_msi_data)(struct pcie_port *pp, int pos);
	void (*scan_bus)(struct pcie_port *pp);
	int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
};

struct pcie_port {
	u8			root_bus_nr;
	u64			cfg0_base;
	void __iomem		*va_cfg0_base;
	u32			cfg0_size;
	u64			cfg1_base;
	void __iomem		*va_cfg1_base;
	u32			cfg1_size;
	resource_size_t		io_base;
	phys_addr_t		io_bus_addr;
	u32			io_size;
	u64			mem_base;
	phys_addr_t		mem_bus_addr;
	u32			mem_size;
	struct resource		*cfg;
	struct resource		*io;
	struct resource		*mem;
	struct resource		*busn;
	int			irq;
	struct dw_pcie_host_ops	*ops;
	int			msi_irq;
	struct irq_domain	*irq_domain;
	unsigned long		msi_data;
	DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
};

struct dw_pcie_ops {
	u32	(*readl_dbi)(struct dw_pcie *pcie, u32 reg);
	void	(*writel_dbi)(struct dw_pcie *pcie, u32 reg, u32 val);
	int	(*link_up)(struct dw_pcie *pcie);
};

struct dw_pcie {
	struct device		*dev;
	void __iomem		*dbi_base;
	u32			num_viewport;
	u8			iatu_unroll_enabled;
	struct pcie_port	pp;
	const struct dw_pcie_ops *ops;
};

#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)

int dw_pcie_read(void __iomem *addr, int size, u32 *val);
int dw_pcie_write(void __iomem *addr, int size, u32 val);
irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
void dw_pcie_msi_init(struct pcie_port *pp);
void dw_pcie_setup_rc(struct pcie_port *pp);
int dw_pcie_host_init(struct pcie_port *pp);

u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
			       int type, u64 cpu_addr, u64 pci_addr,
			       u32 size);
void dw_pcie_setup(struct dw_pcie *pci);
#endif /* _PCIE_DESIGNWARE_H */