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Merge branch 'pci/host-mediatek' into next

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* pci/host-mediatek:
  PCI: mediatek: Use PCI_NUM_INTX
  PCI: mediatek: Add MSI support for MT2712 and MT7622
  PCI: mediatek: Use bus->sysdata to get host private data
  dt-bindings: PCI: Add support for MT2712 and MT7622
  PCI: mediatek: Add controller support for MT2712 and MT7622
  dt-bindings: PCI: Cleanup MediaTek binding text
  dt-bindings: PCI: Rename MediaTek binding
  PCI: mediatek: Switch to use platform_get_resource_byname()
  PCI: mediatek: Add a structure to abstract the controller generations
  PCI: mediatek: Rename port->index and mtk_pcie_parse_ports()
  PCI: mediatek: Use readl_poll_timeout() to wait for Gen2 training
  PCI: mediatek: Explicitly request exclusive reset control
This commit is contained in:
Bjorn Helgaas
2017-09-07 13:24:03 -05:00
parent 9857f12565 d84c246b73
commit a2efd68120
4 changed files with 976 additions and 201 deletions
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130
Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt
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@@ -1,130 +0,0 @@
MediaTek Gen2 PCIe controller which is available on MT7623 series SoCs
PCIe subsys supports single root complex (RC) with 3 Root Ports. Each root
ports supports a Gen2 1-lane Link and has PIPE interface to PHY.
Required properties:
- compatible: Should contain "mediatek,mt7623-pcie".
- device_type: Must be "pci"
- reg: Base addresses and lengths of the PCIe controller.
- #address-cells: Address representation for root ports (must be 3)
- #size-cells: Size representation for root ports (must be 2)
- #interrupt-cells: Size representation for interrupts (must be 1)
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- free_ck :for reference clock of PCIe subsys
- sys_ck0 :for clock of Port0
- sys_ck1 :for clock of Port1
- sys_ck2 :for clock of Port2
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- pcie-rst0 :port0 reset
- pcie-rst1 :port1 reset
- pcie-rst2 :port2 reset
- phys: List of PHY specifiers (used by generic PHY framework).
- phy-names : Must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
number of PHYs as specified in *phys* property.
- power-domains: A phandle and power domain specifier pair to the power domain
which is responsible for collapsing and restoring power to the peripheral.
- bus-range: Range of bus numbers associated with this controller.
- ranges: Ranges for the PCI memory and I/O regions.
In addition, the device tree node must have sub-nodes describing each
PCIe port interface, having the following mandatory properties:
Required properties:
- device_type: Must be "pci"
- reg: Only the first four bytes are used to refer to the correct bus number
and device number.
- #address-cells: Must be 3
- #size-cells: Must be 2
- #interrupt-cells: Must be 1
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- ranges: Sub-ranges distributed from the PCIe controller node. An empty
property is sufficient.
- num-lanes: Number of lanes to use for this port.
Examples:
hifsys: syscon@1a000000 {
compatible = "mediatek,mt7623-hifsys",
"mediatek,mt2701-hifsys",
"syscon";
reg = <0 0x1a000000 0 0x1000>;
#clock-cells = <1>;
#reset-cells = <1>;
};
pcie: pcie-controller@1a140000 {
compatible = "mediatek,mt7623-pcie";
device_type = "pci";
reg = <0 0x1a140000 0 0x1000>, /* PCIe shared registers */
<0 0x1a142000 0 0x1000>, /* Port0 registers */
<0 0x1a143000 0 0x1000>, /* Port1 registers */
<0 0x1a144000 0 0x1000>; /* Port2 registers */
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0xf800 0 0 0>;
interrupt-map = <0x0000 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>,
<0x0800 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>,
<0x1000 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
clocks = <&topckgen CLK_TOP_ETHIF_SEL>,
<&hifsys CLK_HIFSYS_PCIE0>,
<&hifsys CLK_HIFSYS_PCIE1>,
<&hifsys CLK_HIFSYS_PCIE2>;
clock-names = "free_ck", "sys_ck0", "sys_ck1", "sys_ck2";
resets = <&hifsys MT2701_HIFSYS_PCIE0_RST>,
<&hifsys MT2701_HIFSYS_PCIE1_RST>,
<&hifsys MT2701_HIFSYS_PCIE2_RST>;
reset-names = "pcie-rst0", "pcie-rst1", "pcie-rst2";
phys = <&pcie0_phy>, <&pcie1_phy>, <&pcie2_phy>;
phy-names = "pcie-phy0", "pcie-phy1", "pcie-phy2";
power-domains = <&scpsys MT2701_POWER_DOMAIN_HIF>;
bus-range = <0x00 0xff>;
ranges = <0x81000000 0 0x1a160000 0 0x1a160000 0 0x00010000 /* I/O space */
0x83000000 0 0x60000000 0 0x60000000 0 0x10000000>; /* memory space */
pcie@0,0 {
device_type = "pci";
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@1,0 {
device_type = "pci";
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@2,0 {
device_type = "pci";
reg = <0x1000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
};

284
Documentation/devicetree/bindings/pci/mediatek-pcie.txt Normal file
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@@ -0,0 +1,284 @@
MediaTek Gen2 PCIe controller
Required properties:
- compatible: Should contain one of the following strings:
"mediatek,mt2701-pcie"
"mediatek,mt2712-pcie"
"mediatek,mt7622-pcie"
"mediatek,mt7623-pcie"
- device_type: Must be "pci"
- reg: Base addresses and lengths of the PCIe subsys and root ports.
- reg-names: Names of the above areas to use during resource lookup.
- #address-cells: Address representation for root ports (must be 3)
- #size-cells: Size representation for root ports (must be 2)
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names:
Mandatory entries:
- sys_ckN :transaction layer and data link layer clock
Required entries for MT2701/MT7623:
- free_ck :for reference clock of PCIe subsys
Required entries for MT2712/MT7622:
- ahb_ckN :AHB slave interface operating clock for CSR access and RC
initiated MMIO access
Required entries for MT7622:
- axi_ckN :application layer MMIO channel operating clock
- aux_ckN :pe2_mac_bridge and pe2_mac_core operating clock when
pcie_mac_ck/pcie_pipe_ck is turned off
- obff_ckN :OBFF functional block operating clock
- pipe_ckN :LTSSM and PHY/MAC layer operating clock
where N starting from 0 to one less than the number of root ports.
- phys: List of PHY specifiers (used by generic PHY framework).
- phy-names : Must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
number of PHYs as specified in *phys* property.
- power-domains: A phandle and power domain specifier pair to the power domain
which is responsible for collapsing and restoring power to the peripheral.
- bus-range: Range of bus numbers associated with this controller.
- ranges: Ranges for the PCI memory and I/O regions.
Required properties for MT7623/MT2701:
- #interrupt-cells: Size representation for interrupts (must be 1)
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must be "pcie-rst0", "pcie-rst1", "pcie-rstN".. based on the
number of root ports.
Required properties for MT2712/MT7622:
-interrupts: A list of interrupt outputs of the controller, must have one
entry for each PCIe port
In addition, the device tree node must have sub-nodes describing each
PCIe port interface, having the following mandatory properties:
Required properties:
- device_type: Must be "pci"
- reg: Only the first four bytes are used to refer to the correct bus number
and device number.
- #address-cells: Must be 3
- #size-cells: Must be 2
- #interrupt-cells: Must be 1
- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties
Please refer to the standard PCI bus binding document for a more detailed
explanation.
- ranges: Sub-ranges distributed from the PCIe controller node. An empty
property is sufficient.
- num-lanes: Number of lanes to use for this port.
Examples for MT7623:
hifsys: syscon@1a000000 {
compatible = "mediatek,mt7623-hifsys",
"mediatek,mt2701-hifsys",
"syscon";
reg = <0 0x1a000000 0 0x1000>;
#clock-cells = <1>;
#reset-cells = <1>;
};
pcie: pcie-controller@1a140000 {
compatible = "mediatek,mt7623-pcie";
device_type = "pci";
reg = <0 0x1a140000 0 0x1000>, /* PCIe shared registers */
<0 0x1a142000 0 0x1000>, /* Port0 registers */
<0 0x1a143000 0 0x1000>, /* Port1 registers */
<0 0x1a144000 0 0x1000>; /* Port2 registers */
reg-names = "subsys", "port0", "port1", "port2";
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0xf800 0 0 0>;
interrupt-map = <0x0000 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>,
<0x0800 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>,
<0x1000 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
clocks = <&topckgen CLK_TOP_ETHIF_SEL>,
<&hifsys CLK_HIFSYS_PCIE0>,
<&hifsys CLK_HIFSYS_PCIE1>,
<&hifsys CLK_HIFSYS_PCIE2>;
clock-names = "free_ck", "sys_ck0", "sys_ck1", "sys_ck2";
resets = <&hifsys MT2701_HIFSYS_PCIE0_RST>,
<&hifsys MT2701_HIFSYS_PCIE1_RST>,
<&hifsys MT2701_HIFSYS_PCIE2_RST>;
reset-names = "pcie-rst0", "pcie-rst1", "pcie-rst2";
phys = <&pcie0_phy PHY_TYPE_PCIE>, <&pcie1_phy PHY_TYPE_PCIE>,
<&pcie2_phy PHY_TYPE_PCIE>;
phy-names = "pcie-phy0", "pcie-phy1", "pcie-phy2";
power-domains = <&scpsys MT2701_POWER_DOMAIN_HIF>;
bus-range = <0x00 0xff>;
ranges = <0x81000000 0 0x1a160000 0 0x1a160000 0 0x00010000 /* I/O space */
0x83000000 0 0x60000000 0 0x60000000 0 0x10000000>; /* memory space */
pcie@0,0 {
device_type = "pci";
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 193 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@1,0 {
device_type = "pci";
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
pcie@2,0 {
device_type = "pci";
reg = <0x1000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0>;
interrupt-map = <0 0 0 0 &sysirq GIC_SPI 195 IRQ_TYPE_LEVEL_LOW>;
ranges;
num-lanes = <1>;
};
};
Examples for MT2712:
pcie: pcie@11700000 {
compatible = "mediatek,mt2712-pcie";
device_type = "pci";
reg = <0 0x11700000 0 0x1000>,
<0 0x112ff000 0 0x1000>;
reg-names = "port0", "port1";
#address-cells = <3>;
#size-cells = <2>;
interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&topckgen CLK_TOP_PE2_MAC_P0_SEL>,
<&topckgen CLK_TOP_PE2_MAC_P1_SEL>,
<&pericfg CLK_PERI_PCIE0>,
<&pericfg CLK_PERI_PCIE1>;
clock-names = "sys_ck0", "sys_ck1", "ahb_ck0", "ahb_ck1";
phys = <&pcie0_phy PHY_TYPE_PCIE>, <&pcie1_phy PHY_TYPE_PCIE>;
phy-names = "pcie-phy0", "pcie-phy1";
bus-range = <0x00 0xff>;
ranges = <0x82000000 0 0x20000000 0x0 0x20000000 0 0x10000000>;
pcie0: pcie@0,0 {
device_type = "pci";
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
ranges;
num-lanes = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc0 0>,
<0 0 0 2 &pcie_intc0 1>,
<0 0 0 3 &pcie_intc0 2>,
<0 0 0 4 &pcie_intc0 3>;
pcie_intc0: interrupt-controller {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <1>;
};
};
pcie1: pcie@1,0 {
device_type = "pci";
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
ranges;
num-lanes = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc1 0>,
<0 0 0 2 &pcie_intc1 1>,
<0 0 0 3 &pcie_intc1 2>,
<0 0 0 4 &pcie_intc1 3>;
pcie_intc1: interrupt-controller {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <1>;
};
};
};
Examples for MT7622:
pcie: pcie@1a140000 {
compatible = "mediatek,mt7622-pcie";
device_type = "pci";
reg = <0 0x1a140000 0 0x1000>,
<0 0x1a143000 0 0x1000>,
<0 0x1a145000 0 0x1000>;
reg-names = "subsys", "port0", "port1";
#address-cells = <3>;
#size-cells = <2>;
interrupts = <GIC_SPI 228 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 229 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pciesys CLK_PCIE_P0_MAC_EN>,
<&pciesys CLK_PCIE_P1_MAC_EN>,
<&pciesys CLK_PCIE_P0_AHB_EN>,
<&pciesys CLK_PCIE_P1_AHB_EN>,
<&pciesys CLK_PCIE_P0_AUX_EN>,
<&pciesys CLK_PCIE_P1_AUX_EN>,
<&pciesys CLK_PCIE_P0_AXI_EN>,
<&pciesys CLK_PCIE_P1_AXI_EN>,
<&pciesys CLK_PCIE_P0_OBFF_EN>,
<&pciesys CLK_PCIE_P1_OBFF_EN>,
<&pciesys CLK_PCIE_P0_PIPE_EN>,
<&pciesys CLK_PCIE_P1_PIPE_EN>;
clock-names = "sys_ck0", "sys_ck1", "ahb_ck0", "ahb_ck1",
"aux_ck0", "aux_ck1", "axi_ck0", "axi_ck1",
"obff_ck0", "obff_ck1", "pipe_ck0", "pipe_ck1";
phys = <&pcie0_phy PHY_TYPE_PCIE>, <&pcie1_phy PHY_TYPE_PCIE>;
phy-names = "pcie-phy0", "pcie-phy1";
power-domains = <&scpsys MT7622_POWER_DOMAIN_HIF0>;
bus-range = <0x00 0xff>;
ranges = <0x82000000 0 0x20000000 0x0 0x20000000 0 0x10000000>;
pcie0: pcie@0,0 {
device_type = "pci";
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
ranges;
num-lanes = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc0 0>,
<0 0 0 2 &pcie_intc0 1>,
<0 0 0 3 &pcie_intc0 2>,
<0 0 0 4 &pcie_intc0 3>;
pcie_intc0: interrupt-controller {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <1>;
};
};
pcie1: pcie@1,0 {
device_type = "pci";
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
ranges;
num-lanes = <1>;
interrupt-map-mask = <0 0 0 7>;
interrupt-map = <0 0 0 1 &pcie_intc1 0>,
<0 0 0 2 &pcie_intc1 1>,
<0 0 0 3 &pcie_intc1 2>,
<0 0 0 4 &pcie_intc1 3>;
pcie_intc1: interrupt-controller {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <1>;
};
};
};

5
drivers/pci/host/Kconfig
View File

@@ -182,14 +182,13 @@ config PCIE_ROCKCHIP
config PCIE_MEDIATEK config PCIE_MEDIATEK
bool "MediaTek PCIe controller" bool "MediaTek PCIe controller"
depends on ARM && (ARCH_MEDIATEK || COMPILE_TEST) depends on (ARM || ARM64) && (ARCH_MEDIATEK || COMPILE_TEST)
depends on OF depends on OF
depends on PCI depends on PCI
select PCIEPORTBUS select PCIEPORTBUS
help help
Say Y here if you want to enable PCIe controller support on Say Y here if you want to enable PCIe controller support on
MT7623 series SoCs. There is one single root complex with 3 root MediaTek SoCs.
ports available. Each port supports Gen2 lane x1.
config PCIE_TANGO_SMP8759 config PCIE_TANGO_SMP8759
bool "Tango SMP8759 PCIe controller (DANGEROUS)" bool "Tango SMP8759 PCIe controller (DANGEROUS)"

758
drivers/pci/host/pcie-mediatek.c
View File

@@ -3,6 +3,7 @@
* *
* Copyright (c) 2017 MediaTek Inc. * Copyright (c) 2017 MediaTek Inc.
* Author: Ryder Lee <ryder.lee@mediatek.com> * Author: Ryder Lee <ryder.lee@mediatek.com>
* Honghui Zhang <honghui.zhang@mediatek.com>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
@@ -16,6 +17,9 @@
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/iopoll.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <linux/of_pci.h> #include <linux/of_pci.h>
@@ -63,16 +67,104 @@
#define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16)) #define PCIE_FC_CREDIT_MASK (GENMASK(31, 31) | GENMASK(28, 16))
#define PCIE_FC_CREDIT_VAL(x) ((x) << 16) #define PCIE_FC_CREDIT_VAL(x) ((x) << 16)
/* PCIe V2 share registers */
#define PCIE_SYS_CFG_V2 0x0
#define PCIE_CSR_LTSSM_EN(x) BIT(0 + (x) * 8)
#define PCIE_CSR_ASPM_L1_EN(x) BIT(1 + (x) * 8)
/* PCIe V2 per-port registers */
#define PCIE_MSI_VECTOR 0x0c0
#define PCIE_INT_MASK 0x420
#define INTX_MASK GENMASK(19, 16)
#define INTX_SHIFT 16
#define PCIE_INT_STATUS 0x424
#define MSI_STATUS BIT(23)
#define PCIE_IMSI_STATUS 0x42c
#define PCIE_IMSI_ADDR 0x430
#define MSI_MASK BIT(23)
#define MTK_MSI_IRQS_NUM 32
#define PCIE_AHB_TRANS_BASE0_L 0x438
#define PCIE_AHB_TRANS_BASE0_H 0x43c
#define AHB2PCIE_SIZE(x) ((x) & GENMASK(4, 0))
#define PCIE_AXI_WINDOW0 0x448
#define WIN_ENABLE BIT(7)
/* PCIe V2 configuration transaction header */
#define PCIE_CFG_HEADER0 0x460
#define PCIE_CFG_HEADER1 0x464
#define PCIE_CFG_HEADER2 0x468
#define PCIE_CFG_WDATA 0x470
#define PCIE_APP_TLP_REQ 0x488
#define PCIE_CFG_RDATA 0x48c
#define APP_CFG_REQ BIT(0)
#define APP_CPL_STATUS GENMASK(7, 5)
#define CFG_WRRD_TYPE_0 4
#define CFG_WR_FMT 2
#define CFG_RD_FMT 0
#define CFG_DW0_LENGTH(length) ((length) & GENMASK(9, 0))
#define CFG_DW0_TYPE(type) (((type) << 24) & GENMASK(28, 24))
#define CFG_DW0_FMT(fmt) (((fmt) << 29) & GENMASK(31, 29))
#define CFG_DW2_REGN(regn) ((regn) & GENMASK(11, 2))
#define CFG_DW2_FUN(fun) (((fun) << 16) & GENMASK(18, 16))
#define CFG_DW2_DEV(dev) (((dev) << 19) & GENMASK(23, 19))
#define CFG_DW2_BUS(bus) (((bus) << 24) & GENMASK(31, 24))
#define CFG_HEADER_DW0(type, fmt) \
(CFG_DW0_LENGTH(1) | CFG_DW0_TYPE(type) | CFG_DW0_FMT(fmt))
#define CFG_HEADER_DW1(where, size) \
(GENMASK(((size) - 1), 0) << ((where) & 0x3))
#define CFG_HEADER_DW2(regn, fun, dev, bus) \
(CFG_DW2_REGN(regn) | CFG_DW2_FUN(fun) | \
CFG_DW2_DEV(dev) | CFG_DW2_BUS(bus))
#define PCIE_RST_CTRL 0x510
#define PCIE_PHY_RSTB BIT(0)
#define PCIE_PIPE_SRSTB BIT(1)
#define PCIE_MAC_SRSTB BIT(2)
#define PCIE_CRSTB BIT(3)
#define PCIE_PERSTB BIT(8)
#define PCIE_LINKDOWN_RST_EN GENMASK(15, 13)
#define PCIE_LINK_STATUS_V2 0x804
#define PCIE_PORT_LINKUP_V2 BIT(10)
struct mtk_pcie_port;
/**
* struct mtk_pcie_soc - differentiate between host generations
* @has_msi: whether this host supports MSI interrupts or not
* @ops: pointer to configuration access functions
* @startup: pointer to controller setting functions
* @setup_irq: pointer to initialize IRQ functions
*/
struct mtk_pcie_soc {
bool has_msi;
struct pci_ops *ops;
int (*startup)(struct mtk_pcie_port *port);
int (*setup_irq)(struct mtk_pcie_port *port, struct device_node *node);
};
/** /**
* struct mtk_pcie_port - PCIe port information * struct mtk_pcie_port - PCIe port information
* @base: IO mapped register base * @base: IO mapped register base
* @list: port list * @list: port list
* @pcie: pointer to PCIe host info * @pcie: pointer to PCIe host info
* @reset: pointer to port reset control * @reset: pointer to port reset control
* @sys_ck: pointer to bus clock * @sys_ck: pointer to transaction/data link layer clock
* @phy: pointer to phy control block * @ahb_ck: pointer to AHB slave interface operating clock for CSR access
* and RC initiated MMIO access
* @axi_ck: pointer to application layer MMIO channel operating clock
* @aux_ck: pointer to pe2_mac_bridge and pe2_mac_core operating clock
* when pcie_mac_ck/pcie_pipe_ck is turned off
* @obff_ck: pointer to OBFF functional block operating clock
* @pipe_ck: pointer to LTSSM and PHY/MAC layer operating clock
* @phy: pointer to PHY control block
* @lane: lane count * @lane: lane count
* @index: port index * @slot: port slot
* @irq_domain: legacy INTx IRQ domain
* @msi_domain: MSI IRQ domain
* @msi_irq_in_use: bit map for assigned MSI IRQ
*/ */
struct mtk_pcie_port { struct mtk_pcie_port {
void __iomem *base; void __iomem *base;
@@ -80,9 +172,17 @@ struct mtk_pcie_port {
struct mtk_pcie *pcie; struct mtk_pcie *pcie;
struct reset_control *reset; struct reset_control *reset;
struct clk *sys_ck; struct clk *sys_ck;
struct clk *ahb_ck;
struct clk *axi_ck;
struct clk *aux_ck;
struct clk *obff_ck;
struct clk *pipe_ck;
struct phy *phy; struct phy *phy;
u32 lane; u32 lane;
u32 index; u32 slot;
struct irq_domain *irq_domain;
struct irq_domain *msi_domain;
DECLARE_BITMAP(msi_irq_in_use, MTK_MSI_IRQS_NUM);
}; };
/** /**
@@ -96,6 +196,7 @@ struct mtk_pcie_port {
* @busn: bus range * @busn: bus range
* @offset: IO / Memory offset * @offset: IO / Memory offset
* @ports: pointer to PCIe port information * @ports: pointer to PCIe port information
* @soc: pointer to SoC-dependent operations
*/ */
struct mtk_pcie { struct mtk_pcie {
struct device *dev; struct device *dev;
@@ -111,13 +212,9 @@ struct mtk_pcie {
resource_size_t io; resource_size_t io;
} offset; } offset;
struct list_head ports; struct list_head ports;
const struct mtk_pcie_soc *soc;
}; };
static inline bool mtk_pcie_link_up(struct mtk_pcie_port *port)
{
return !!(readl(port->base + PCIE_LINK_STATUS) & PCIE_PORT_LINKUP);
}
static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie) static void mtk_pcie_subsys_powerdown(struct mtk_pcie *pcie)
{ {
struct device *dev = pcie->dev; struct device *dev = pcie->dev;
@@ -146,6 +243,12 @@ static void mtk_pcie_put_resources(struct mtk_pcie *pcie)
list_for_each_entry_safe(port, tmp, &pcie->ports, list) { list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
phy_power_off(port->phy); phy_power_off(port->phy);
phy_exit(port->phy);
clk_disable_unprepare(port->pipe_ck);
clk_disable_unprepare(port->obff_ck);
clk_disable_unprepare(port->axi_ck);
clk_disable_unprepare(port->aux_ck);
clk_disable_unprepare(port->ahb_ck);
clk_disable_unprepare(port->sys_ck); clk_disable_unprepare(port->sys_ck);
mtk_pcie_port_free(port); mtk_pcie_port_free(port);
} }
@@ -153,11 +256,412 @@ static void mtk_pcie_put_resources(struct mtk_pcie *pcie)
mtk_pcie_subsys_powerdown(pcie); mtk_pcie_subsys_powerdown(pcie);
} }
static int mtk_pcie_check_cfg_cpld(struct mtk_pcie_port *port)
{
u32 val;
int err;
err = readl_poll_timeout_atomic(port->base + PCIE_APP_TLP_REQ, val,
!(val & APP_CFG_REQ), 10,
100 * USEC_PER_MSEC);
if (err)
return PCIBIOS_SET_FAILED;
if (readl(port->base + PCIE_APP_TLP_REQ) & APP_CPL_STATUS)
return PCIBIOS_SET_FAILED;
return PCIBIOS_SUCCESSFUL;
}
static int mtk_pcie_hw_rd_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn,
int where, int size, u32 *val)
{
u32 tmp;
/* Write PCIe configuration transaction header for Cfgrd */
writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_RD_FMT),
port->base + PCIE_CFG_HEADER0);
writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1);
writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus),
port->base + PCIE_CFG_HEADER2);
/* Trigger h/w to transmit Cfgrd TLP */
tmp = readl(port->base + PCIE_APP_TLP_REQ);
tmp |= APP_CFG_REQ;
writel(tmp, port->base + PCIE_APP_TLP_REQ);
/* Check completion status */
if (mtk_pcie_check_cfg_cpld(port))
return PCIBIOS_SET_FAILED;
/* Read cpld payload of Cfgrd */
*val = readl(port->base + PCIE_CFG_RDATA);
if (size == 1)
*val = (*val >> (8 * (where & 3))) & 0xff;
else if (size == 2)
*val = (*val >> (8 * (where & 3))) & 0xffff;
return PCIBIOS_SUCCESSFUL;
}
static int mtk_pcie_hw_wr_cfg(struct mtk_pcie_port *port, u32 bus, u32 devfn,
int where, int size, u32 val)
{
/* Write PCIe configuration transaction header for Cfgwr */
writel(CFG_HEADER_DW0(CFG_WRRD_TYPE_0, CFG_WR_FMT),
port->base + PCIE_CFG_HEADER0);
writel(CFG_HEADER_DW1(where, size), port->base + PCIE_CFG_HEADER1);
writel(CFG_HEADER_DW2(where, PCI_FUNC(devfn), PCI_SLOT(devfn), bus),
port->base + PCIE_CFG_HEADER2);
/* Write Cfgwr data */
val = val << 8 * (where & 3);
writel(val, port->base + PCIE_CFG_WDATA);
/* Trigger h/w to transmit Cfgwr TLP */
val = readl(port->base + PCIE_APP_TLP_REQ);
val |= APP_CFG_REQ;
writel(val, port->base + PCIE_APP_TLP_REQ);
/* Check completion status */
return mtk_pcie_check_cfg_cpld(port);
}
static struct mtk_pcie_port *mtk_pcie_find_port(struct pci_bus *bus,
unsigned int devfn)
{
struct mtk_pcie *pcie = bus->sysdata;
struct mtk_pcie_port *port;
list_for_each_entry(port, &pcie->ports, list)
if (port->slot == PCI_SLOT(devfn))
return port;
return NULL;
}
static int mtk_pcie_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
struct mtk_pcie_port *port;
u32 bn = bus->number;
int ret;
port = mtk_pcie_find_port(bus, devfn);
if (!port) {
*val = ~0;
return PCIBIOS_DEVICE_NOT_FOUND;
}
ret = mtk_pcie_hw_rd_cfg(port, bn, devfn, where, size, val);
if (ret)
*val = ~0;
return ret;
}
static int mtk_pcie_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
struct mtk_pcie_port *port;
u32 bn = bus->number;
port = mtk_pcie_find_port(bus, devfn);
if (!port)
return PCIBIOS_DEVICE_NOT_FOUND;
return mtk_pcie_hw_wr_cfg(port, bn, devfn, where, size, val);
}
static struct pci_ops mtk_pcie_ops_v2 = {
.read = mtk_pcie_config_read,
.write = mtk_pcie_config_write,
};
static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
{
struct mtk_pcie *pcie = port->pcie;
struct resource *mem = &pcie->mem;
u32 val;
size_t size;
int err;
/* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */
if (pcie->base) {
val = readl(pcie->base + PCIE_SYS_CFG_V2);
val |= PCIE_CSR_LTSSM_EN(port->slot) |
PCIE_CSR_ASPM_L1_EN(port->slot);
writel(val, pcie->base + PCIE_SYS_CFG_V2);
}
/* Assert all reset signals */
writel(0, port->base + PCIE_RST_CTRL);
/*
* Enable PCIe link down reset, if link status changed from link up to
* link down, this will reset MAC control registers and configuration
* space.
*/
writel(PCIE_LINKDOWN_RST_EN, port->base + PCIE_RST_CTRL);
/* De-assert PHY, PE, PIPE, MAC and configuration reset */
val = readl(port->base + PCIE_RST_CTRL);
val |= PCIE_PHY_RSTB | PCIE_PERSTB | PCIE_PIPE_SRSTB |
PCIE_MAC_SRSTB | PCIE_CRSTB;
writel(val, port->base + PCIE_RST_CTRL);
/* 100ms timeout value should be enough for Gen1/2 training */
err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_V2, val,
!!(val & PCIE_PORT_LINKUP_V2), 20,
100 * USEC_PER_MSEC);
if (err)
return -ETIMEDOUT;
/* Set INTx mask */
val = readl(port->base + PCIE_INT_MASK);
val &= ~INTX_MASK;
writel(val, port->base + PCIE_INT_MASK);
/* Set AHB to PCIe translation windows */
size = mem->end - mem->start;
val = lower_32_bits(mem->start) | AHB2PCIE_SIZE(fls(size));
writel(val, port->base + PCIE_AHB_TRANS_BASE0_L);
val = upper_32_bits(mem->start);
writel(val, port->base + PCIE_AHB_TRANS_BASE0_H);
/* Set PCIe to AXI translation memory space.*/
val = fls(0xffffffff) | WIN_ENABLE;
writel(val, port->base + PCIE_AXI_WINDOW0);
return 0;
}
static int mtk_pcie_msi_alloc(struct mtk_pcie_port *port)
{
int msi;
msi = find_first_zero_bit(port->msi_irq_in_use, MTK_MSI_IRQS_NUM);
if (msi < MTK_MSI_IRQS_NUM)
set_bit(msi, port->msi_irq_in_use);
else
return -ENOSPC;
return msi;
}
static void mtk_pcie_msi_free(struct mtk_pcie_port *port, unsigned long hwirq)
{
clear_bit(hwirq, port->msi_irq_in_use);
}
static int mtk_pcie_msi_setup_irq(struct msi_controller *chip,
struct pci_dev *pdev, struct msi_desc *desc)
{
struct mtk_pcie_port *port;
struct msi_msg msg;
unsigned int irq;
int hwirq;
phys_addr_t msg_addr;
port = mtk_pcie_find_port(pdev->bus, pdev->devfn);
if (!port)
return -EINVAL;
hwirq = mtk_pcie_msi_alloc(port);
if (hwirq < 0)
return hwirq;
irq = irq_create_mapping(port->msi_domain, hwirq);
if (!irq) {
mtk_pcie_msi_free(port, hwirq);
return -EINVAL;
}
chip->dev = &pdev->dev;
irq_set_msi_desc(irq, desc);
/* MT2712/MT7622 only support 32-bit MSI addresses */
msg_addr = virt_to_phys(port->base + PCIE_MSI_VECTOR);
msg.address_hi = 0;
msg.address_lo = lower_32_bits(msg_addr);
msg.data = hwirq;
pci_write_msi_msg(irq, &msg);
return 0;
}
static void mtk_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
{
struct pci_dev *pdev = to_pci_dev(chip->dev);
struct irq_data *d = irq_get_irq_data(irq);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
struct mtk_pcie_port *port;
port = mtk_pcie_find_port(pdev->bus, pdev->devfn);
if (!port)
return;
irq_dispose_mapping(irq);
mtk_pcie_msi_free(port, hwirq);
}
static struct msi_controller mtk_pcie_msi_chip = {
.setup_irq = mtk_pcie_msi_setup_irq,
.teardown_irq = mtk_msi_teardown_irq,
};
static struct irq_chip mtk_msi_irq_chip = {
.name = "MTK PCIe MSI",
.irq_enable = pci_msi_unmask_irq,
.irq_disable = pci_msi_mask_irq,
.irq_mask = pci_msi_mask_irq,
.irq_unmask = pci_msi_unmask_irq,
};
static int mtk_pcie_msi_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &mtk_msi_irq_chip, handle_simple_irq);
irq_set_chip_data(irq, domain->host_data);
return 0;
}
static const struct irq_domain_ops msi_domain_ops = {
.map = mtk_pcie_msi_map,
};
static void mtk_pcie_enable_msi(struct mtk_pcie_port *port)
{
u32 val;
phys_addr_t msg_addr;
msg_addr = virt_to_phys(port->base + PCIE_MSI_VECTOR);
val = lower_32_bits(msg_addr);
writel(val, port->base + PCIE_IMSI_ADDR);
val = readl(port->base + PCIE_INT_MASK);
val &= ~MSI_MASK;
writel(val, port->base + PCIE_INT_MASK);
}
static int mtk_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
irq_hw_number_t hwirq)
{
irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq);
irq_set_chip_data(irq, domain->host_data);
return 0;
}
static const struct irq_domain_ops intx_domain_ops = {
.map = mtk_pcie_intx_map,
};
static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port,
struct device_node *node)
{
struct device *dev = port->pcie->dev;
struct device_node *pcie_intc_node;
/* Setup INTx */
pcie_intc_node = of_get_next_child(node, NULL);
if (!pcie_intc_node) {
dev_err(dev, "no PCIe Intc node found\n");
return -ENODEV;
}
port->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,
&intx_domain_ops, port);
if (!port->irq_domain) {
dev_err(dev, "failed to get INTx IRQ domain\n");
return -ENODEV;
}
if (IS_ENABLED(CONFIG_PCI_MSI)) {
port->msi_domain = irq_domain_add_linear(node, MTK_MSI_IRQS_NUM,
&msi_domain_ops,
&mtk_pcie_msi_chip);
if (!port->msi_domain) {
dev_err(dev, "failed to create MSI IRQ domain\n");
return -ENODEV;
}
mtk_pcie_enable_msi(port);
}
return 0;
}
static irqreturn_t mtk_pcie_intr_handler(int irq, void *data)
{
struct mtk_pcie_port *port = (struct mtk_pcie_port *)data;
unsigned long status;
u32 virq;
u32 bit = INTX_SHIFT;
while ((status = readl(port->base + PCIE_INT_STATUS)) & INTX_MASK) {
for_each_set_bit_from(bit, &status, PCI_NUM_INTX + INTX_SHIFT) {
/* Clear the INTx */
writel(1 << bit, port->base + PCIE_INT_STATUS);
virq = irq_find_mapping(port->irq_domain,
bit - INTX_SHIFT);
generic_handle_irq(virq);
}
}
if (IS_ENABLED(CONFIG_PCI_MSI)) {
while ((status = readl(port->base + PCIE_INT_STATUS)) & MSI_STATUS) {
unsigned long imsi_status;
while ((imsi_status = readl(port->base + PCIE_IMSI_STATUS))) {
for_each_set_bit(bit, &imsi_status, MTK_MSI_IRQS_NUM) {
/* Clear the MSI */
writel(1 << bit, port->base + PCIE_IMSI_STATUS);
virq = irq_find_mapping(port->msi_domain, bit);
generic_handle_irq(virq);
}
}
/* Clear MSI interrupt status */
writel(MSI_STATUS, port->base + PCIE_INT_STATUS);
}
}
return IRQ_HANDLED;
}
static int mtk_pcie_setup_irq(struct mtk_pcie_port *port,
struct device_node *node)
{
struct mtk_pcie *pcie = port->pcie;
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
int err, irq;
irq = platform_get_irq(pdev, port->slot);
err = devm_request_irq(dev, irq, mtk_pcie_intr_handler,
IRQF_SHARED, "mtk-pcie", port);
if (err) {
dev_err(dev, "unable to request IRQ %d\n", irq);
return err;
}
err = mtk_pcie_init_irq_domain(port, node);
if (err) {
dev_err(dev, "failed to init PCIe IRQ domain\n");
return err;
}
return 0;
}
static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus, static void __iomem *mtk_pcie_map_bus(struct pci_bus *bus,
unsigned int devfn, int where) unsigned int devfn, int where)
{ {
struct pci_host_bridge *host = pci_find_host_bridge(bus); struct mtk_pcie *pcie = bus->sysdata;
struct mtk_pcie *pcie = pci_host_bridge_priv(host);
writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn), writel(PCIE_CONF_ADDR(where, PCI_FUNC(devfn), PCI_SLOT(devfn),
bus->number), pcie->base + PCIE_CFG_ADDR); bus->number), pcie->base + PCIE_CFG_ADDR);
@@ -171,16 +675,34 @@ static struct pci_ops mtk_pcie_ops = {
.write = pci_generic_config_write, .write = pci_generic_config_write,
}; };
static void mtk_pcie_configure_rc(struct mtk_pcie_port *port) static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
{ {
struct mtk_pcie *pcie = port->pcie; struct mtk_pcie *pcie = port->pcie;
u32 func = PCI_FUNC(port->index << 3); u32 func = PCI_FUNC(port->slot << 3);
u32 slot = PCI_SLOT(port->index << 3); u32 slot = PCI_SLOT(port->slot << 3);
u32 val; u32 val;
int err;
/* assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val |= PCIE_PORT_PERST(port->slot);
writel(val, pcie->base + PCIE_SYS_CFG);
/* de-assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val &= ~PCIE_PORT_PERST(port->slot);
writel(val, pcie->base + PCIE_SYS_CFG);
/* 100ms timeout value should be enough for Gen1/2 training */
err = readl_poll_timeout(port->base + PCIE_LINK_STATUS, val,
!!(val & PCIE_PORT_LINKUP), 20,
100 * USEC_PER_MSEC);
if (err)
return -ETIMEDOUT;
/* enable interrupt */ /* enable interrupt */
val = readl(pcie->base + PCIE_INT_ENABLE); val = readl(pcie->base + PCIE_INT_ENABLE);
val |= PCIE_PORT_INT_EN(port->index); val |= PCIE_PORT_INT_EN(port->slot);
writel(val, pcie->base + PCIE_INT_ENABLE); writel(val, pcie->base + PCIE_INT_ENABLE);
/* map to all DDR region. We need to set it before cfg operation. */ /* map to all DDR region. We need to set it before cfg operation. */
@@ -209,67 +731,94 @@ static void mtk_pcie_configure_rc(struct mtk_pcie_port *port)
writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0), writel(PCIE_CONF_ADDR(PCIE_FTS_NUM, func, slot, 0),
pcie->base + PCIE_CFG_ADDR); pcie->base + PCIE_CFG_ADDR);
writel(val, pcie->base + PCIE_CFG_DATA); writel(val, pcie->base + PCIE_CFG_DATA);
return 0;
} }
static void mtk_pcie_assert_ports(struct mtk_pcie_port *port) static void mtk_pcie_enable_port(struct mtk_pcie_port *port)
{ {
struct mtk_pcie *pcie = port->pcie; struct mtk_pcie *pcie = port->pcie;
u32 val; struct device *dev = pcie->dev;
/* assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val |= PCIE_PORT_PERST(port->index);
writel(val, pcie->base + PCIE_SYS_CFG);
/* de-assert port PERST_N */
val = readl(pcie->base + PCIE_SYS_CFG);
val &= ~PCIE_PORT_PERST(port->index);
writel(val, pcie->base + PCIE_SYS_CFG);
/* PCIe v2.0 need at least 100ms delay to train from Gen1 to Gen2 */
msleep(100);
}
static void mtk_pcie_enable_ports(struct mtk_pcie_port *port)
{
struct device *dev = port->pcie->dev;
int err; int err;
err = clk_prepare_enable(port->sys_ck); err = clk_prepare_enable(port->sys_ck);
if (err) { if (err) {
dev_err(dev, "failed to enable port%d clock\n", port->index); dev_err(dev, "failed to enable sys_ck%d clock\n", port->slot);
goto err_sys_clk; goto err_sys_clk;
} }
err = clk_prepare_enable(port->ahb_ck);
if (err) {
dev_err(dev, "failed to enable ahb_ck%d\n", port->slot);
goto err_ahb_clk;
}
err = clk_prepare_enable(port->aux_ck);
if (err) {
dev_err(dev, "failed to enable aux_ck%d\n", port->slot);
goto err_aux_clk;
}
err = clk_prepare_enable(port->axi_ck);
if (err) {
dev_err(dev, "failed to enable axi_ck%d\n", port->slot);
goto err_axi_clk;
}
err = clk_prepare_enable(port->obff_ck);
if (err) {
dev_err(dev, "failed to enable obff_ck%d\n", port->slot);
goto err_obff_clk;
}
err = clk_prepare_enable(port->pipe_ck);
if (err) {
dev_err(dev, "failed to enable pipe_ck%d\n", port->slot);
goto err_pipe_clk;
}
reset_control_assert(port->reset); reset_control_assert(port->reset);
reset_control_deassert(port->reset); reset_control_deassert(port->reset);
err = phy_init(port->phy);
if (err) {
dev_err(dev, "failed to initialize port%d phy\n", port->slot);
goto err_phy_init;
}
err = phy_power_on(port->phy); err = phy_power_on(port->phy);
if (err) { if (err) {
dev_err(dev, "failed to power on port%d phy\n", port->index); dev_err(dev, "failed to power on port%d phy\n", port->slot);
goto err_phy_on; goto err_phy_on;
} }
mtk_pcie_assert_ports(port); if (!pcie->soc->startup(port))
/* if link up, then setup root port configuration space */
if (mtk_pcie_link_up(port)) {
mtk_pcie_configure_rc(port);
return; return;
}
dev_info(dev, "Port%d link down\n", port->index); dev_info(dev, "Port%d link down\n", port->slot);
phy_power_off(port->phy); phy_power_off(port->phy);
err_phy_on: err_phy_on:
phy_exit(port->phy);
err_phy_init:
clk_disable_unprepare(port->pipe_ck);
err_pipe_clk:
clk_disable_unprepare(port->obff_ck);
err_obff_clk:
clk_disable_unprepare(port->axi_ck);
err_axi_clk:
clk_disable_unprepare(port->aux_ck);
err_aux_clk:
clk_disable_unprepare(port->ahb_ck);
err_ahb_clk:
clk_disable_unprepare(port->sys_ck); clk_disable_unprepare(port->sys_ck);
err_sys_clk: err_sys_clk:
mtk_pcie_port_free(port); mtk_pcie_port_free(port);
} }
static int mtk_pcie_parse_ports(struct mtk_pcie *pcie, static int mtk_pcie_parse_port(struct mtk_pcie *pcie,
struct device_node *node, struct device_node *node,
int index) int slot)
{ {
struct mtk_pcie_port *port; struct mtk_pcie_port *port;
struct resource *regs; struct resource *regs;
@@ -288,34 +837,87 @@ static int mtk_pcie_parse_ports(struct mtk_pcie *pcie,
return err; return err;
} }
regs = platform_get_resource(pdev, IORESOURCE_MEM, index + 1); snprintf(name, sizeof(name), "port%d", slot);
regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
port->base = devm_ioremap_resource(dev, regs); port->base = devm_ioremap_resource(dev, regs);
if (IS_ERR(port->base)) { if (IS_ERR(port->base)) {
dev_err(dev, "failed to map port%d base\n", index); dev_err(dev, "failed to map port%d base\n", slot);
return PTR_ERR(port->base); return PTR_ERR(port->base);
} }
snprintf(name, sizeof(name), "sys_ck%d", index); snprintf(name, sizeof(name), "sys_ck%d", slot);
port->sys_ck = devm_clk_get(dev, name); port->sys_ck = devm_clk_get(dev, name);
if (IS_ERR(port->sys_ck)) { if (IS_ERR(port->sys_ck)) {
dev_err(dev, "failed to get port%d clock\n", index); dev_err(dev, "failed to get sys_ck%d clock\n", slot);
return PTR_ERR(port->sys_ck); return PTR_ERR(port->sys_ck);
} }
snprintf(name, sizeof(name), "pcie-rst%d", index); /* sys_ck might be divided into the following parts in some chips */
port->reset = devm_reset_control_get_optional(dev, name); snprintf(name, sizeof(name), "ahb_ck%d", slot);
port->ahb_ck = devm_clk_get(dev, name);
if (IS_ERR(port->ahb_ck)) {
if (PTR_ERR(port->ahb_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
port->ahb_ck = NULL;
}
snprintf(name, sizeof(name), "axi_ck%d", slot);
port->axi_ck = devm_clk_get(dev, name);
if (IS_ERR(port->axi_ck)) {
if (PTR_ERR(port->axi_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
port->axi_ck = NULL;
}
snprintf(name, sizeof(name), "aux_ck%d", slot);
port->aux_ck = devm_clk_get(dev, name);
if (IS_ERR(port->aux_ck)) {
if (PTR_ERR(port->aux_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
port->aux_ck = NULL;
}
snprintf(name, sizeof(name), "obff_ck%d", slot);
port->obff_ck = devm_clk_get(dev, name);
if (IS_ERR(port->obff_ck)) {
if (PTR_ERR(port->obff_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
port->obff_ck = NULL;
}
snprintf(name, sizeof(name), "pipe_ck%d", slot);
port->pipe_ck = devm_clk_get(dev, name);
if (IS_ERR(port->pipe_ck)) {
if (PTR_ERR(port->pipe_ck) == -EPROBE_DEFER)
return -EPROBE_DEFER;
port->pipe_ck = NULL;
}
snprintf(name, sizeof(name), "pcie-rst%d", slot);
port->reset = devm_reset_control_get_optional_exclusive(dev, name);
if (PTR_ERR(port->reset) == -EPROBE_DEFER) if (PTR_ERR(port->reset) == -EPROBE_DEFER)
return PTR_ERR(port->reset); return PTR_ERR(port->reset);
/* some platforms may use default PHY setting */ /* some platforms may use default PHY setting */
snprintf(name, sizeof(name), "pcie-phy%d", index); snprintf(name, sizeof(name), "pcie-phy%d", slot);
port->phy = devm_phy_optional_get(dev, name); port->phy = devm_phy_optional_get(dev, name);
if (IS_ERR(port->phy)) if (IS_ERR(port->phy))
return PTR_ERR(port->phy); return PTR_ERR(port->phy);
port->index = index; port->slot = slot;
port->pcie = pcie; port->pcie = pcie;
if (pcie->soc->setup_irq) {
err = pcie->soc->setup_irq(port, node);
if (err)
return err;
}
INIT_LIST_HEAD(&port->list); INIT_LIST_HEAD(&port->list);
list_add_tail(&port->list, &pcie->ports); list_add_tail(&port->list, &pcie->ports);
@@ -329,12 +931,14 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
struct resource *regs; struct resource *regs;
int err; int err;
/* get shared registers */ /* get shared registers, which are optional */
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "subsys");
pcie->base = devm_ioremap_resource(dev, regs); if (regs) {
if (IS_ERR(pcie->base)) { pcie->base = devm_ioremap_resource(dev, regs);
dev_err(dev, "failed to map shared register\n"); if (IS_ERR(pcie->base)) {
return PTR_ERR(pcie->base); dev_err(dev, "failed to map shared register\n");
return PTR_ERR(pcie->base);
}
} }
pcie->free_ck = devm_clk_get(dev, "free_ck"); pcie->free_ck = devm_clk_get(dev, "free_ck");
@@ -422,7 +1026,7 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
} }
for_each_available_child_of_node(node, child) { for_each_available_child_of_node(node, child) {
int index; int slot;
err = of_pci_get_devfn(child); err = of_pci_get_devfn(child);
if (err < 0) { if (err < 0) {
@@ -430,9 +1034,9 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
return err; return err;
} }
index = PCI_SLOT(err); slot = PCI_SLOT(err);
err = mtk_pcie_parse_ports(pcie, child, index); err = mtk_pcie_parse_port(pcie, child, slot);
if (err) if (err)
return err; return err;
} }
@@ -443,7 +1047,7 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
/* enable each port, and then check link status */ /* enable each port, and then check link status */
list_for_each_entry_safe(port, tmp, &pcie->ports, list) list_for_each_entry_safe(port, tmp, &pcie->ports, list)
mtk_pcie_enable_ports(port); mtk_pcie_enable_port(port);
/* power down PCIe subsys if slots are all empty (link down) */ /* power down PCIe subsys if slots are all empty (link down) */
if (list_empty(&pcie->ports)) if (list_empty(&pcie->ports))
@@ -480,9 +1084,12 @@ static int mtk_pcie_register_host(struct pci_host_bridge *host)
host->busnr = pcie->busn.start; host->busnr = pcie->busn.start;
host->dev.parent = pcie->dev; host->dev.parent = pcie->dev;
host->ops = &mtk_pcie_ops; host->ops = pcie->soc->ops;
host->map_irq = of_irq_parse_and_map_pci; host->map_irq = of_irq_parse_and_map_pci;
host->swizzle_irq = pci_common_swizzle; host->swizzle_irq = pci_common_swizzle;
host->sysdata = pcie;
if (IS_ENABLED(CONFIG_PCI_MSI) && pcie->soc->has_msi)
host->msi = &mtk_pcie_msi_chip;
err = pci_scan_root_bus_bridge(host); err = pci_scan_root_bus_bridge(host);
if (err < 0) if (err < 0)
@@ -513,6 +1120,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
pcie = pci_host_bridge_priv(host); pcie = pci_host_bridge_priv(host);
pcie->dev = dev; pcie->dev = dev;
pcie->soc = of_device_get_match_data(dev);
platform_set_drvdata(pdev, pcie); platform_set_drvdata(pdev, pcie);
INIT_LIST_HEAD(&pcie->ports); INIT_LIST_HEAD(&pcie->ports);
@@ -537,9 +1145,23 @@ put_resources:
return err; return err;
} }
static const struct mtk_pcie_soc mtk_pcie_soc_v1 = {
.ops = &mtk_pcie_ops,
.startup = mtk_pcie_startup_port,
};
static const struct mtk_pcie_soc mtk_pcie_soc_v2 = {
.has_msi = true,
.ops = &mtk_pcie_ops_v2,
.startup = mtk_pcie_startup_port_v2,
.setup_irq = mtk_pcie_setup_irq,
};
static const struct of_device_id mtk_pcie_ids[] = { static const struct of_device_id mtk_pcie_ids[] = {
{ .compatible = "mediatek,mt7623-pcie"}, { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 },
{ .compatible = "mediatek,mt2701-pcie"}, { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 },
{ .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_v2 },
{ .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_v2 },
{}, {},
}; };