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PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver 

Add driver for the PCIe controller of the MT7621 SoC.

[bhelgaas: rename from pci-mt7621.c to pcie-mt7621.c; also rename Kconfig
symbol from PCI_MT7621 to PCIE_MT7621]
Link: https://lore.kernel.org/r/20210922050035.18162-3-sergio.paracuellos@gmail.com
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2021-09-22 07:00:34 +02:00 committed by Bjorn Helgaas
parent 27cee7d7ce
commit 2bdd5238e7
10 changed files with 24 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/mips/ralink/Kconfig
View File

@ -51,7 +51,8 @@ choice
select SYS_SUPPORTS_HIGHMEM
select MIPS_GIC
select CLKSRC_MIPS_GIC
select HAVE_PCI if PCI_MT7621
select HAVE_PCI
select PCI_DRIVERS_GENERIC
select SOC_BUS
endchoice

8
drivers/pci/controller/Kconfig
View File

@ -312,6 +312,14 @@ config PCIE_HISI_ERR
Say Y here if you want error handling support
for the PCIe controller's errors on HiSilicon HIP SoCs
config PCIE_MT7621
tristate "MediaTek MT7621 PCIe Controller"
depends on (RALINK && SOC_MT7621) || (MIPS && COMPILE_TEST)
select PHY_MT7621_PCI
default SOC_MT7621
help
This selects a driver for the MediaTek MT7621 PCIe Controller.
source "drivers/pci/controller/dwc/Kconfig"
source "drivers/pci/controller/mobiveil/Kconfig"
source "drivers/pci/controller/cadence/Kconfig"

2
drivers/pci/controller/Makefile
View File

@ -37,6 +37,8 @@ obj-$(CONFIG_VMD) += vmd.o
obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o
obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
obj-$(CONFIG_PCIE_MT7621) += pcie-mt7621.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
obj-y += mobiveil/

24
drivers/staging/mt7621-pci/pci-mt7621.c → drivers/pci/controller/pcie-mt7621.c
View File

@ -30,18 +30,18 @@
#include <linux/reset.h>
#include <linux/sys_soc.h>
/* MediaTek specific configuration registers */
/* MediaTek-specific configuration registers */
#define PCIE_FTS_NUM 0x70c
#define PCIE_FTS_NUM_MASK GENMASK(15, 8)
#define PCIE_FTS_NUM_L0(x) (((x) & 0xff) << 8)
/* Host-PCI bridge registers */
#define RALINK_PCI_PCICFG_ADDR 0x0000
#define RALINK_PCI_PCIMSK_ADDR 0x000C
#define RALINK_PCI_PCIMSK_ADDR 0x000c
#define RALINK_PCI_CONFIG_ADDR 0x0020
#define RALINK_PCI_CONFIG_DATA 0x0024
#define RALINK_PCI_MEMBASE 0x0028
#define RALINK_PCI_IOBASE 0x002C
#define RALINK_PCI_IOBASE 0x002c
/* PCIe RC control registers */
#define RALINK_PCI_ID 0x0030
@ -132,7 +132,7 @@ static inline void pcie_port_write(struct mt7621_pcie_port *port,
static inline u32 mt7621_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
unsigned int func, unsigned int where)
{
return (((where & 0xF00) >> 8) << 24) | (bus << 16) | (slot << 11) |
return (((where & 0xf00) >> 8) << 24) | (bus << 16) | (slot << 11) |
(func << 8) | (where & 0xfc) | 0x80000000;
}
@ -217,7 +217,7 @@ static int setup_cm_memory_region(struct pci_host_bridge *host)
entry = resource_list_first_type(&host->windows, IORESOURCE_MEM);
if (!entry) {
dev_err(dev, "Cannot get memory resource\n");
dev_err(dev, "cannot get memory resource\n");
return -EINVAL;
}
@ -280,7 +280,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
GPIOD_OUT_LOW);
if (IS_ERR(port->gpio_rst)) {
dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
dev_err(dev, "failed to get GPIO for PCIe%d\n", slot);
err = PTR_ERR(port->gpio_rst);
goto remove_reset;
}
@ -409,7 +409,7 @@ static int mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
err = mt7621_pcie_init_port(port);
if (err) {
dev_err(dev, "Initiating port %d failed\n", slot);
dev_err(dev, "initializing port %d failed\n", slot);
list_del(&port->list);
}
}
@ -476,7 +476,7 @@ static int mt7621_pcie_enable_ports(struct pci_host_bridge *host)
entry = resource_list_first_type(&host->windows, IORESOURCE_IO);
if (!entry) {
dev_err(dev, "Cannot get io resource\n");
dev_err(dev, "cannot get io resource\n");
return -EINVAL;
}
@ -541,25 +541,25 @@ static int mt7621_pci_probe(struct platform_device *pdev)
err = mt7621_pcie_parse_dt(pcie);
if (err) {
dev_err(dev, "Parsing DT failed\n");
dev_err(dev, "parsing DT failed\n");
return err;
}
err = mt7621_pcie_init_ports(pcie);
if (err) {
dev_err(dev, "Nothing connected in virtual bridges\n");
dev_err(dev, "nothing connected in virtual bridges\n");
return 0;
}
err = mt7621_pcie_enable_ports(bridge);
if (err) {
dev_err(dev, "Error enabling pcie ports\n");
dev_err(dev, "error enabling pcie ports\n");
goto remove_resets;
}
err = setup_cm_memory_region(bridge);
if (err) {
dev_err(dev, "Error setting up iocu mem regions\n");
dev_err(dev, "error setting up iocu mem regions\n");
goto remove_resets;
}

2
drivers/staging/Kconfig
View File

@ -86,8 +86,6 @@ source "drivers/staging/vc04_services/Kconfig"
source "drivers/staging/pi433/Kconfig"
source "drivers/staging/mt7621-pci/Kconfig"
source "drivers/staging/mt7621-dma/Kconfig"
source "drivers/staging/ralink-gdma/Kconfig"

1
drivers/staging/Makefile
View File

@ -33,7 +33,6 @@ obj-$(CONFIG_KS7010) += ks7010/
obj-$(CONFIG_GREYBUS) += greybus/
obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/
obj-$(CONFIG_PI433) += pi433/
obj-$(CONFIG_PCI_MT7621) += mt7621-pci/
obj-$(CONFIG_SOC_MT7621) += mt7621-dma/
obj-$(CONFIG_DMA_RALINK) += ralink-gdma/
obj-$(CONFIG_SOC_MT7621) += mt7621-dts/

8
drivers/staging/mt7621-pci/Kconfig
View File

@ -1,8 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
config PCI_MT7621
tristate "MediaTek MT7621 PCI Controller"
depends on RALINK
select PCI_DRIVERS_GENERIC
help
This selects a driver for the MediaTek MT7621 PCI Controller.

2
drivers/staging/mt7621-pci/Makefile
View File

@ -1,2 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCI_MT7621) += pci-mt7621.o

4
drivers/staging/mt7621-pci/TODO
View File

@ -1,4 +0,0 @@
- general code review and cleanup
Cc: NeilBrown <neil@brown.name>

104
drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
View File

@ -1,104 +0,0 @@
MediaTek MT7621 PCIe controller
Required properties:
- compatible: "mediatek,mt7621-pci"
- device_type: Must be "pci"
- reg: Base addresses and lengths of the PCIe subsys and root ports.
- bus-range: Range of bus numbers associated with this controller.
- #address-cells: Address representation for root ports (must be 3)
- pinctrl-names : The pin control state names.
- pinctrl-0: The "default" pinctrl state.
- #size-cells: Size representation for root ports (must be 2)
- ranges: Ranges for the PCI memory and I/O regions.
- #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.
- status: either "disabled" or "okay".
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
root ports.
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
root ports.
- reset-gpios: GPIO specs for the reset pins.
In addition, the device tree node must have sub-nodes describing each PCIe port
interface, having the following mandatory properties:
Required properties:
- 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
- ranges: Sub-ranges distributed from the PCIe controller node. An empty
property is sufficient.
- bus-range: Range of bus numbers associated with this port.
Example for MT7621:
pcie: pcie@1e140000 {
compatible = "mediatek,mt7621-pci";
reg = <0x1e140000 0x100 /* host-pci bridge registers */
0x1e142000 0x100 /* pcie port 0 RC control registers */
0x1e143000 0x100 /* pcie port 1 RC control registers */
0x1e144000 0x100>; /* pcie port 2 RC control registers */
#address-cells = <3>;
#size-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&pcie_pins>;
device_type = "pci";
bus-range = <0 255>;
ranges = <
0x02000000 0 0x00000000 0x60000000 0 0x10000000 /* pci memory */
0x01000000 0 0x00000000 0x1e160000 0 0x00010000 /* io space */
>;
#interrupt-cells = <1>;
interrupt-map-mask = <0xF0000 0 0 1>;
interrupt-map = <0x10000 0 0 1 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>,
<0x20000 0 0 1 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>,
<0x30000 0 0 1 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
status = "disabled";
resets = <&rstctrl 24 &rstctrl 25 &rstctrl 26>;
reset-names = "pcie0", "pcie1", "pcie2";
clocks = <&clkctrl 24 &clkctrl 25 &clkctrl 26>;
clock-names = "pcie0", "pcie1", "pcie2";
reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>,
<&gpio 8 GPIO_ACTIVE_LOW>,
<&gpio 7 GPIO_ACTIVE_LOW>;
pcie@0,0 {
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
ranges;
bus-range = <0x00 0xff>;
};
pcie@1,0 {
reg = <0x0800 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
ranges;
bus-range = <0x00 0xff>;
};
pcie@2,0 {
reg = <0x1000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
ranges;
bus-range = <0x00 0xff>;
};
};