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/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (c) 2017 Cadence
// Cadence PCIe controller driver.
// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
#ifndef _PCIE_CADENCE_H
#define _PCIE_CADENCE_H
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/phy/phy.h>
/*
* Local Management Registers
*/
#define CDNS_PCIE_LM_BASE 0x00100000
/* Vendor ID Register */
#define CDNS_PCIE_LM_ID (CDNS_PCIE_LM_BASE + 0x0044)
#define CDNS_PCIE_LM_ID_VENDOR_MASK GENMASK(15, 0)
#define CDNS_PCIE_LM_ID_VENDOR_SHIFT 0
#define CDNS_PCIE_LM_ID_VENDOR(vid) \
(((vid) << CDNS_PCIE_LM_ID_VENDOR_SHIFT) & CDNS_PCIE_LM_ID_VENDOR_MASK)
#define CDNS_PCIE_LM_ID_SUBSYS_MASK GENMASK(31, 16)
#define CDNS_PCIE_LM_ID_SUBSYS_SHIFT 16
#define CDNS_PCIE_LM_ID_SUBSYS(sub) \
(((sub) << CDNS_PCIE_LM_ID_SUBSYS_SHIFT) & CDNS_PCIE_LM_ID_SUBSYS_MASK)
/* Root Port Requestor ID Register */
#define CDNS_PCIE_LM_RP_RID (CDNS_PCIE_LM_BASE + 0x0228)
#define CDNS_PCIE_LM_RP_RID_MASK GENMASK(15, 0)
#define CDNS_PCIE_LM_RP_RID_SHIFT 0
#define CDNS_PCIE_LM_RP_RID_(rid) \
(((rid) << CDNS_PCIE_LM_RP_RID_SHIFT) & CDNS_PCIE_LM_RP_RID_MASK)
/* Endpoint Bus and Device Number Register */
#define CDNS_PCIE_LM_EP_ID (CDNS_PCIE_LM_BASE + 0x022c)
#define CDNS_PCIE_LM_EP_ID_DEV_MASK GENMASK(4, 0)
#define CDNS_PCIE_LM_EP_ID_DEV_SHIFT 0
#define CDNS_PCIE_LM_EP_ID_BUS_MASK GENMASK(15, 8)
#define CDNS_PCIE_LM_EP_ID_BUS_SHIFT 8
/* Endpoint Function f BAR b Configuration Registers */
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) \
(CDNS_PCIE_LM_BASE + 0x0240 + (fn) * 0x0008)
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn) \
(CDNS_PCIE_LM_BASE + 0x0244 + (fn) * 0x0008)
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) \
(GENMASK(4, 0) << ((b) * 8))
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE(b, a) \
(((a) << ((b) * 8)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b))
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b) \
(GENMASK(7, 5) << ((b) * 8))
#define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL(b, c) \
(((c) << ((b) * 8 + 5)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b))
/* Endpoint Function Configuration Register */
#define CDNS_PCIE_LM_EP_FUNC_CFG (CDNS_PCIE_LM_BASE + 0x02c0)
/* Root Complex BAR Configuration Register */
#define CDNS_PCIE_LM_RC_BAR_CFG (CDNS_PCIE_LM_BASE + 0x0300)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK GENMASK(5, 0)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE(a) \
(((a) << 0) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK GENMASK(8, 6)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL(c) \
(((c) << 6) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK GENMASK(13, 9)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE(a) \
(((a) << 9) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK GENMASK(16, 14)
#define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL(c) \
(((c) << 14) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK)
#define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_ENABLE BIT(17)
#define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_32BITS 0
#define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_64BITS BIT(18)
#define CDNS_PCIE_LM_RC_BAR_CFG_IO_ENABLE BIT(19)
#define CDNS_PCIE_LM_RC_BAR_CFG_IO_16BITS 0
#define CDNS_PCIE_LM_RC_BAR_CFG_IO_32BITS BIT(20)
#define CDNS_PCIE_LM_RC_BAR_CFG_CHECK_ENABLE BIT(31)
/* BAR control values applicable to both Endpoint Function and Root Complex */
#define CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED 0x0
#define CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS 0x1
#define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS 0x4
#define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS 0x5
#define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS 0x6
#define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7
/*
* Endpoint Function Registers (PCI configuration space for endpoint functions)
*/
#define CDNS_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12))
#define CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET 0x90
/*
* Root Port Registers (PCI configuration space for the root port function)
*/
#define CDNS_PCIE_RP_BASE 0x00200000
/*
* Address Translation Registers
*/
#define CDNS_PCIE_AT_BASE 0x00400000
/* Region r Outbound AXI to PCIe Address Translation Register 0 */
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0(r) \
(CDNS_PCIE_AT_BASE + 0x0000 + ((r) & 0x1f) * 0x0020)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK GENMASK(5, 0)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(nbits) \
(((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \
(((devfn) << 12) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20)
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \
(((bus) << 20) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK)
/* Region r Outbound AXI to PCIe Address Translation Register 1 */
#define CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(r) \
(CDNS_PCIE_AT_BASE + 0x0004 + ((r) & 0x1f) * 0x0020)
/* Region r Outbound PCIe Descriptor Register 0 */
#define CDNS_PCIE_AT_OB_REGION_DESC0(r) \
(CDNS_PCIE_AT_BASE + 0x0008 + ((r) & 0x1f) * 0x0020)
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MASK GENMASK(3, 0)
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MEM 0x2
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_IO 0x6
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0 0xa
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1 0xb
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_NORMAL_MSG 0xc
#define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_VENDOR_MSG 0xd
/* Bit 23 MUST be set in RC mode. */
#define CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23)
#define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24)
#define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \
(((devfn) << 24) & CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK)
/* Region r Outbound PCIe Descriptor Register 1 */
#define CDNS_PCIE_AT_OB_REGION_DESC1(r) \
(CDNS_PCIE_AT_BASE + 0x000c + ((r) & 0x1f) * 0x0020)
#define CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK GENMASK(7, 0)
#define CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus) \
((bus) & CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK)
/* Region r AXI Region Base Address Register 0 */
#define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r) \
(CDNS_PCIE_AT_BASE + 0x0018 + ((r) & 0x1f) * 0x0020)
#define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK GENMASK(5, 0)
#define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) \
(((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK)
/* Region r AXI Region Base Address Register 1 */
#define CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r) \
(CDNS_PCIE_AT_BASE + 0x001c + ((r) & 0x1f) * 0x0020)
/* Root Port BAR Inbound PCIe to AXI Address Translation Register */
#define CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar) \
(CDNS_PCIE_AT_BASE + 0x0800 + (bar) * 0x0008)
#define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK GENMASK(5, 0)
#define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(nbits) \
(((nbits) - 1) & CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK)
#define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \
(CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008)
/* AXI link down register */
#define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824)
enum cdns_pcie_rp_bar {
RP_BAR0,
RP_BAR1,
RP_NO_BAR
};
/* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */
#define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \
(CDNS_PCIE_AT_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008)
#define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \
(CDNS_PCIE_AT_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008)
/* Normal/Vendor specific message access: offset inside some outbound region */
#define CDNS_PCIE_NORMAL_MSG_ROUTING_MASK GENMASK(7, 5)
#define CDNS_PCIE_NORMAL_MSG_ROUTING(route) \
(((route) << 5) & CDNS_PCIE_NORMAL_MSG_ROUTING_MASK)
#define CDNS_PCIE_NORMAL_MSG_CODE_MASK GENMASK(15, 8)
#define CDNS_PCIE_NORMAL_MSG_CODE(code) \
(((code) << 8) & CDNS_PCIE_NORMAL_MSG_CODE_MASK)
#define CDNS_PCIE_MSG_NO_DATA BIT(16)
struct cdns_pcie;
enum cdns_pcie_msg_code {
MSG_CODE_ASSERT_INTA = 0x20,
MSG_CODE_ASSERT_INTB = 0x21,
MSG_CODE_ASSERT_INTC = 0x22,
MSG_CODE_ASSERT_INTD = 0x23,
MSG_CODE_DEASSERT_INTA = 0x24,
MSG_CODE_DEASSERT_INTB = 0x25,
MSG_CODE_DEASSERT_INTC = 0x26,
MSG_CODE_DEASSERT_INTD = 0x27,
};
enum cdns_pcie_msg_routing {
/* Route to Root Complex */
MSG_ROUTING_TO_RC,
/* Use Address Routing */
MSG_ROUTING_BY_ADDR,
/* Use ID Routing */
MSG_ROUTING_BY_ID,
/* Route as Broadcast Message from Root Complex */
MSG_ROUTING_BCAST,
/* Local message; terminate at receiver (INTx messages) */
MSG_ROUTING_LOCAL,
/* Gather & route to Root Complex (PME_TO_Ack message) */
MSG_ROUTING_GATHER,
};
/**
* struct cdns_pcie - private data for Cadence PCIe controller drivers
* @reg_base: IO mapped register base
* @mem_res: start/end offsets in the physical system memory to map PCI accesses
* @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint.
* @bus: In Root Complex mode, the bus number
*/
struct cdns_pcie {
void __iomem *reg_base;
struct resource *mem_res;
struct device *dev;
bool is_rc;
u8 bus;
int phy_count;
struct phy **phy;
struct device_link **link;
const struct cdns_pcie_common_ops *ops;
};
/**
* struct cdns_pcie_rc - private data for this PCIe Root Complex driver
* @pcie: Cadence PCIe controller
* @dev: pointer to PCIe device
* @cfg_res: start/end offsets in the physical system memory to map PCI
* configuration space accesses
* @bus_range: first/last buses behind the PCIe host controller
* @cfg_base: IO mapped window to access the PCI configuration space of a
* single function at a time
* @no_bar_nbits: Number of bits to keep for inbound (PCIe -> CPU) address
* translation (nbits sets into the "no BAR match" register)
* @vendor_id: PCI vendor ID
* @device_id: PCI device ID
*/
struct cdns_pcie_rc {
struct cdns_pcie pcie;
struct resource *cfg_res;
struct resource *bus_range;
void __iomem *cfg_base;
u32 no_bar_nbits;
u32 vendor_id;
u32 device_id;
};
/**
* struct cdns_pcie_ep - private data for this PCIe endpoint controller driver
* @pcie: Cadence PCIe controller
* @max_regions: maximum number of regions supported by hardware
* @ob_region_map: bitmask of mapped outbound regions
* @ob_addr: base addresses in the AXI bus where the outbound regions start
* @irq_phys_addr: base address on the AXI bus where the MSI/legacy IRQ
* dedicated outbound regions is mapped.
* @irq_cpu_addr: base address in the CPU space where a write access triggers
* the sending of a memory write (MSI) / normal message (legacy
* IRQ) TLP through the PCIe bus.
* @irq_pci_addr: used to save the current mapping of the MSI/legacy IRQ
* dedicated outbound region.
* @irq_pci_fn: the latest PCI function that has updated the mapping of
* the MSI/legacy IRQ dedicated outbound region.
* @irq_pending: bitmask of asserted legacy IRQs.
*/
struct cdns_pcie_ep {
struct cdns_pcie pcie;
u32 max_regions;
unsigned long ob_region_map;
phys_addr_t *ob_addr;
phys_addr_t irq_phys_addr;
void __iomem *irq_cpu_addr;
u64 irq_pci_addr;
u8 irq_pci_fn;
u8 irq_pending;
};
/* Register access */
static inline void cdns_pcie_writeb(struct cdns_pcie *pcie, u32 reg, u8 value)
{
writeb(value, pcie->reg_base + reg);
}
static inline void cdns_pcie_writew(struct cdns_pcie *pcie, u32 reg, u16 value)
{
writew(value, pcie->reg_base + reg);
}
static inline void cdns_pcie_writel(struct cdns_pcie *pcie, u32 reg, u32 value)
{
writel(value, pcie->reg_base + reg);
}
static inline u32 cdns_pcie_readl(struct cdns_pcie *pcie, u32 reg)
{
return readl(pcie->reg_base + reg);
}
/* Root Port register access */
static inline void cdns_pcie_rp_writeb(struct cdns_pcie *pcie,
u32 reg, u8 value)
{
writeb(value, pcie->reg_base + CDNS_PCIE_RP_BASE + reg);
}
static inline void cdns_pcie_rp_writew(struct cdns_pcie *pcie,
u32 reg, u16 value)
{
writew(value, pcie->reg_base + CDNS_PCIE_RP_BASE + reg);
}
/* Endpoint Function register access */
static inline void cdns_pcie_ep_fn_writeb(struct cdns_pcie *pcie, u8 fn,
u32 reg, u8 value)
{
writeb(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn,
u32 reg, u16 value)
{
writew(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn,
u32 reg, u32 value)
{
writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline u8 cdns_pcie_ep_fn_readb(struct cdns_pcie *pcie, u8 fn, u32 reg)
{
return readb(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline u16 cdns_pcie_ep_fn_readw(struct cdns_pcie *pcie, u8 fn, u32 reg)
{
return readw(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg)
{
return readl(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
}
#ifdef CONFIG_PCIE_CADENCE_HOST
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
#else
static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
{
return 0;
}
#endif
#ifdef CONFIG_PCIE_CADENCE_EP
int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep);
#else
static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
{
return 0;
}
#endif
void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 fn,
u32 r, bool is_io,
u64 cpu_addr, u64 pci_addr, size_t size);
void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, u8 fn,
u32 r, u64 cpu_addr);
void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r);
void cdns_pcie_disable_phy(struct cdns_pcie *pcie);
int cdns_pcie_enable_phy(struct cdns_pcie *pcie);
int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie);
extern const struct dev_pm_ops cdns_pcie_pm_ops;
#endif /* _PCIE_CADENCE_H */
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