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