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Diffstat (limited to 'target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch')
-rw-r--r--target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch901
1 files changed, 0 insertions, 901 deletions
diff --git a/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch b/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch
deleted file mode 100644
index 4bea702..0000000
--- a/target/linux/ramips/patches-3.10/0022-MIPS-add-driver-for-the-built-in-PCI-controller-of-the-RT3883-SoC.patch
+++ /dev/null
@@ -1,901 +0,0 @@
-From patchwork Fri Aug 23 12:03:20 2013
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [v3] MIPS: add driver for the built-in PCI controller of the RT3883
- SoC
-From: Gabor Juhos <juhosg@openwrt.org>
-X-Patchwork-Id: 5758
-Message-Id: <1377259400-21211-1-git-send-email-juhosg@openwrt.org>
-To: Ralf Baechle <ralf@linux-mips.org>
-Cc: linux-mips@linux-mips.org, Gabor Juhos <juhosg@openwrt.org>,
- devicetree@vger.kernel.org
-Date: Fri, 23 Aug 2013 14:03:20 +0200
-
-The Ralink RT3883 SoCs have a built-in PCI Host Controller
-device. The patch adds a platform driver and device tree
-binding documentation for that.
-
-The patch also enables the HW_HAS_PCI config option. This
-is required in order to be able to enable the PCI support.
-
-Cc: devicetree@vger.kernel.org
-Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
-Acked-by: John Crispin <blogic@openwrt.org>
-
----
-Changes since v2:
- - fix compiler warning:
-
- CC arch/mips/pci/pci-rt3883.o
- arch/mips/pci/pci-rt3883.c: In function 'rt3883_pci_probe':
- arch/mips/pci/pci-rt3883.c:458:4: warning: use of 'h' length modifier with 'a' type character [-Wformat]
-
-Changes since v1:
- - change the 'status' property to optional in the binding doc
- - add board specific example to the binding doc
-
-rt3883-pci: fix-build-warning
-
-Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
----
- .../devicetree/bindings/pci/ralink,rt3883-pci.txt | 190 ++++++
- arch/mips/pci/Makefile | 1 +
- arch/mips/pci/pci-rt3883.c | 636 ++++++++++++++++++++
- arch/mips/ralink/Kconfig | 1 +
- 4 files changed, 828 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt
- create mode 100644 arch/mips/pci/pci-rt3883.c
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/pci/ralink,rt3883-pci.txt
-@@ -0,0 +1,190 @@
-+* Mediatek/Ralink RT3883 PCI controller
-+
-+1) Main node
-+
-+ Required properties:
-+
-+ - compatible: must be "ralink,rt3883-pci"
-+
-+ - reg: specifies the physical base address of the controller and
-+ the length of the memory mapped region.
-+
-+ - #address-cells: specifies the number of cells needed to encode an
-+ address. The value must be 1.
-+
-+ - #size-cells: specifies the number of cells used to represent the size
-+ of an address. The value must be 1.
-+
-+ - ranges: specifies the translation between child address space and parent
-+ address space
-+
-+ Optional properties:
-+
-+ - status: indicates the operational status of the device.
-+ Value must be either "disabled" or "okay".
-+
-+2) Child nodes
-+
-+ The main node must have two child nodes which describes the built-in
-+ interrupt controller and the PCI host bridge.
-+
-+ a) Interrupt controller:
-+
-+ Required properties:
-+
-+ - interrupt-controller: identifies the node as an interrupt controller
-+
-+ - #address-cells: specifies the number of cells needed to encode an
-+ address. The value must be 0. As such, 'interrupt-map' nodes do not
-+ have to specify a parent unit address.
-+
-+ - #interrupt-cells: specifies the number of cells needed to encode an
-+ interrupt source. The value must be 1.
-+
-+ - interrupt-parent: the phandle for the interrupt controller that
-+ services interrupts for this device.
-+
-+ - interrupts: specifies the interrupt source of the parent interrupt
-+ controller. The format of the interrupt specifier depends on the
-+ parent interrupt controller.
-+
-+ b) PCI host bridge:
-+
-+ Required properties:
-+
-+ - #address-cells: specifies the number of cells needed to encode an
-+ address. The value must be 0.
-+
-+ - #size-cells: specifies the number of cells used to represent the size
-+ of an address. The value must be 2.
-+
-+ - #interrupt-cells: specifies the number of cells needed to encode an
-+ interrupt source. The value must be 1.
-+
-+ - device_type: must be "pci"
-+
-+ - bus-range: PCI bus numbers covered
-+
-+ - ranges: specifies the ranges for the PCI memory and I/O regions
-+
-+ - interrupt-map-mask,
-+ - interrupt-map: standard PCI properties to define the mapping of the
-+ PCI interface to interrupt numbers.
-+
-+ The PCI host bridge node migh have additional sub-nodes representing
-+ the onboard PCI devices/PCI slots. Each such sub-node must have the
-+ following mandatory properties:
-+
-+ - reg: used only for interrupt mapping, so only the first four bytes
-+ are used to refer to the correct bus number and device number.
-+
-+ - device_type: must be "pci"
-+
-+ If a given sub-node represents a PCI bridge it must have following
-+ mandatory properties as well:
-+
-+ - #address-cells: must be set to <3>
-+
-+ - #size-cells: must set to <2>
-+
-+ - #interrupt-cells: must be set to <1>
-+
-+ - interrupt-map-mask,
-+ - interrupt-map: standard PCI properties to define the mapping of the
-+ PCI interface to interrupt numbers.
-+
-+ Besides the required properties the sub-nodes may have these optional
-+ properties:
-+
-+ - status: indicates the operational status of the sub-node.
-+ Value must be either "disabled" or "okay".
-+
-+3) Example:
-+
-+ a) SoC specific dtsi file:
-+
-+ pci@10140000 {
-+ compatible = "ralink,rt3883-pci";
-+ reg = <0x10140000 0x20000>;
-+ #address-cells = <1>;
-+ #size-cells = <1>;
-+ ranges; /* direct mapping */
-+
-+ status = "disabled";
-+
-+ pciintc: interrupt-controller {
-+ interrupt-controller;
-+ #address-cells = <0>;
-+ #interrupt-cells = <1>;
-+
-+ interrupt-parent = <&cpuintc>;
-+ interrupts = <4>;
-+ };
-+
-+ host-bridge {
-+ #address-cells = <3>;
-+ #size-cells = <2>;
-+ #interrupt-cells = <1>;
-+
-+ device_type = "pci";
-+
-+ bus-range = <0 255>;
-+ ranges = <
-+ 0x02000000 0 0x00000000 0x20000000 0 0x10000000 /* pci memory */
-+ 0x01000000 0 0x00000000 0x10160000 0 0x00010000 /* io space */
-+ >;
-+
-+ interrupt-map-mask = <0xf800 0 0 7>;
-+ interrupt-map = <
-+ /* IDSEL 17 */
-+ 0x8800 0 0 1 &pciintc 18
-+ 0x8800 0 0 2 &pciintc 18
-+ 0x8800 0 0 3 &pciintc 18
-+ 0x8800 0 0 4 &pciintc 18
-+ /* IDSEL 18 */
-+ 0x9000 0 0 1 &pciintc 19
-+ 0x9000 0 0 2 &pciintc 19
-+ 0x9000 0 0 3 &pciintc 19
-+ 0x9000 0 0 4 &pciintc 19
-+ >;
-+
-+ pci-bridge@1 {
-+ reg = <0x0800 0 0 0 0>;
-+ device_type = "pci";
-+ #interrupt-cells = <1>;
-+ #address-cells = <3>;
-+ #size-cells = <2>;
-+
-+ interrupt-map-mask = <0x0 0 0 0>;
-+ interrupt-map = <0x0 0 0 0 &pciintc 20>;
-+
-+ status = "disabled";
-+ };
-+
-+ pci-slot@17 {
-+ reg = <0x8800 0 0 0 0>;
-+ device_type = "pci";
-+
-+ status = "disabled";
-+ };
-+
-+ pci-slot@18 {
-+ reg = <0x9000 0 0 0 0>;
-+ device_type = "pci";
-+
-+ status = "disabled";
-+ };
-+ };
-+ };
-+
-+ b) Board specific dts file:
-+
-+ pci@10140000 {
-+ status = "okay";
-+
-+ host-bridge {
-+ pci-bridge@1 {
-+ status = "okay";
-+ };
-+ };
-+ };
---- a/arch/mips/pci/Makefile
-+++ b/arch/mips/pci/Makefile
-@@ -41,6 +41,7 @@ obj-$(CONFIG_SIBYTE_BCM1x80) += pci-bcm1
- obj-$(CONFIG_SNI_RM) += fixup-sni.o ops-sni.o
- obj-$(CONFIG_LANTIQ) += fixup-lantiq.o
- obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o ops-lantiq.o
-+obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o
- obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
- obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o
- obj-$(CONFIG_TANBAC_TB0287) += fixup-tb0287.o
---- /dev/null
-+++ b/arch/mips/pci/pci-rt3883.c
-@@ -0,0 +1,636 @@
-+/*
-+ * Ralink RT3662/RT3883 SoC PCI support
-+ *
-+ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * Parts of this file are based on Ralink's 2.6.21 BSP
-+ *
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License version 2 as published
-+ * by the Free Software Foundation.
-+ */
-+
-+#include <linux/types.h>
-+#include <linux/pci.h>
-+#include <linux/io.h>
-+#include <linux/init.h>
-+#include <linux/delay.h>
-+#include <linux/interrupt.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_irq.h>
-+#include <linux/of_pci.h>
-+#include <linux/platform_device.h>
-+
-+#include <asm/mach-ralink/rt3883.h>
-+#include <asm/mach-ralink/ralink_regs.h>
-+
-+#define RT3883_MEMORY_BASE 0x00000000
-+#define RT3883_MEMORY_SIZE 0x02000000
-+
-+#define RT3883_PCI_REG_PCICFG 0x00
-+#define RT3883_PCICFG_P2P_BR_DEVNUM_M 0xf
-+#define RT3883_PCICFG_P2P_BR_DEVNUM_S 16
-+#define RT3883_PCICFG_PCIRST BIT(1)
-+#define RT3883_PCI_REG_PCIRAW 0x04
-+#define RT3883_PCI_REG_PCIINT 0x08
-+#define RT3883_PCI_REG_PCIENA 0x0c
-+
-+#define RT3883_PCI_REG_CFGADDR 0x20
-+#define RT3883_PCI_REG_CFGDATA 0x24
-+#define RT3883_PCI_REG_MEMBASE 0x28
-+#define RT3883_PCI_REG_IOBASE 0x2c
-+#define RT3883_PCI_REG_ARBCTL 0x80
-+
-+#define RT3883_PCI_REG_BASE(_x) (0x1000 + (_x) * 0x1000)
-+#define RT3883_PCI_REG_BAR0SETUP(_x) (RT3883_PCI_REG_BASE((_x)) + 0x10)
-+#define RT3883_PCI_REG_IMBASEBAR0(_x) (RT3883_PCI_REG_BASE((_x)) + 0x18)
-+#define RT3883_PCI_REG_ID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x30)
-+#define RT3883_PCI_REG_CLASS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x34)
-+#define RT3883_PCI_REG_SUBID(_x) (RT3883_PCI_REG_BASE((_x)) + 0x38)
-+#define RT3883_PCI_REG_STATUS(_x) (RT3883_PCI_REG_BASE((_x)) + 0x50)
-+
-+#define RT3883_PCI_MODE_NONE 0
-+#define RT3883_PCI_MODE_PCI BIT(0)
-+#define RT3883_PCI_MODE_PCIE BIT(1)
-+#define RT3883_PCI_MODE_BOTH (RT3883_PCI_MODE_PCI | RT3883_PCI_MODE_PCIE)
-+
-+#define RT3883_PCI_IRQ_COUNT 32
-+
-+#define RT3883_P2P_BR_DEVNUM 1
-+
-+struct rt3883_pci_controller {
-+ void __iomem *base;
-+ spinlock_t lock;
-+
-+ struct device_node *intc_of_node;
-+ struct irq_domain *irq_domain;
-+
-+ struct pci_controller pci_controller;
-+ struct resource io_res;
-+ struct resource mem_res;
-+
-+ bool pcie_ready;
-+};
-+
-+static inline struct rt3883_pci_controller *
-+pci_bus_to_rt3883_controller(struct pci_bus *bus)
-+{
-+ struct pci_controller *hose;
-+
-+ hose = (struct pci_controller *) bus->sysdata;
-+ return container_of(hose, struct rt3883_pci_controller, pci_controller);
-+}
-+
-+static inline u32 rt3883_pci_r32(struct rt3883_pci_controller *rpc,
-+ unsigned reg)
-+{
-+ return ioread32(rpc->base + reg);
-+}
-+
-+static inline void rt3883_pci_w32(struct rt3883_pci_controller *rpc,
-+ u32 val, unsigned reg)
-+{
-+ iowrite32(val, rpc->base + reg);
-+}
-+
-+static inline u32 rt3883_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
-+ unsigned int func, unsigned int where)
-+{
-+ return (bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) |
-+ 0x80000000;
-+}
-+
-+static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc,
-+ unsigned bus, unsigned slot,
-+ unsigned func, unsigned reg)
-+{
-+ unsigned long flags;
-+ u32 address;
-+ u32 ret;
-+
-+ address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
-+
-+ spin_lock_irqsave(&rpc->lock, flags);
-+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
-+ ret = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
-+ spin_unlock_irqrestore(&rpc->lock, flags);
-+
-+ return ret;
-+}
-+
-+static void rt3883_pci_write_cfg32(struct rt3883_pci_controller *rpc,
-+ unsigned bus, unsigned slot,
-+ unsigned func, unsigned reg, u32 val)
-+{
-+ unsigned long flags;
-+ u32 address;
-+
-+ address = rt3883_pci_get_cfgaddr(bus, slot, func, reg);
-+
-+ spin_lock_irqsave(&rpc->lock, flags);
-+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
-+ rt3883_pci_w32(rpc, val, RT3883_PCI_REG_CFGDATA);
-+ spin_unlock_irqrestore(&rpc->lock, flags);
-+}
-+
-+static void rt3883_pci_irq_handler(unsigned int irq, struct irq_desc *desc)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ u32 pending;
-+
-+ rpc = irq_get_handler_data(irq);
-+
-+ pending = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIINT) &
-+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
-+
-+ if (!pending) {
-+ spurious_interrupt();
-+ return;
-+ }
-+
-+ while (pending) {
-+ unsigned bit = __ffs(pending);
-+
-+ irq = irq_find_mapping(rpc->irq_domain, bit);
-+ generic_handle_irq(irq);
-+
-+ pending &= ~BIT(bit);
-+ }
-+}
-+
-+static void rt3883_pci_irq_unmask(struct irq_data *d)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ u32 t;
-+
-+ rpc = irq_data_get_irq_chip_data(d);
-+
-+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
-+ rt3883_pci_w32(rpc, t | BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
-+ /* flush write */
-+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
-+}
-+
-+static void rt3883_pci_irq_mask(struct irq_data *d)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ u32 t;
-+
-+ rpc = irq_data_get_irq_chip_data(d);
-+
-+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
-+ rt3883_pci_w32(rpc, t & ~BIT(d->hwirq), RT3883_PCI_REG_PCIENA);
-+ /* flush write */
-+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCIENA);
-+}
-+
-+static struct irq_chip rt3883_pci_irq_chip = {
-+ .name = "RT3883 PCI",
-+ .irq_mask = rt3883_pci_irq_mask,
-+ .irq_unmask = rt3883_pci_irq_unmask,
-+ .irq_mask_ack = rt3883_pci_irq_mask,
-+};
-+
-+static int rt3883_pci_irq_map(struct irq_domain *d, unsigned int irq,
-+ irq_hw_number_t hw)
-+{
-+ irq_set_chip_and_handler(irq, &rt3883_pci_irq_chip, handle_level_irq);
-+ irq_set_chip_data(irq, d->host_data);
-+
-+ return 0;
-+}
-+
-+static const struct irq_domain_ops rt3883_pci_irq_domain_ops = {
-+ .map = rt3883_pci_irq_map,
-+ .xlate = irq_domain_xlate_onecell,
-+};
-+
-+static int rt3883_pci_irq_init(struct device *dev,
-+ struct rt3883_pci_controller *rpc)
-+{
-+ int irq;
-+
-+ irq = irq_of_parse_and_map(rpc->intc_of_node, 0);
-+ if (irq == 0) {
-+ dev_err(dev, "%s has no IRQ",
-+ of_node_full_name(rpc->intc_of_node));
-+ return -EINVAL;
-+ }
-+
-+ /* disable all interrupts */
-+ rt3883_pci_w32(rpc, 0, RT3883_PCI_REG_PCIENA);
-+
-+ rpc->irq_domain =
-+ irq_domain_add_linear(rpc->intc_of_node, RT3883_PCI_IRQ_COUNT,
-+ &rt3883_pci_irq_domain_ops,
-+ rpc);
-+ if (!rpc->irq_domain) {
-+ dev_err(dev, "unable to add IRQ domain\n");
-+ return -ENODEV;
-+ }
-+
-+ irq_set_handler_data(irq, rpc);
-+ irq_set_chained_handler(irq, rt3883_pci_irq_handler);
-+
-+ return 0;
-+}
-+
-+static int rt3883_pci_config_read(struct pci_bus *bus, unsigned int devfn,
-+ int where, int size, u32 *val)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ unsigned long flags;
-+ u32 address;
-+ u32 data;
-+
-+ rpc = pci_bus_to_rt3883_controller(bus);
-+
-+ if (!rpc->pcie_ready && bus->number == 1)
-+ return PCIBIOS_DEVICE_NOT_FOUND;
-+
-+ address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
-+ PCI_FUNC(devfn), where);
-+
-+ spin_lock_irqsave(&rpc->lock, flags);
-+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
-+ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
-+ spin_unlock_irqrestore(&rpc->lock, flags);
-+
-+ switch (size) {
-+ case 1:
-+ *val = (data >> ((where & 3) << 3)) & 0xff;
-+ break;
-+ case 2:
-+ *val = (data >> ((where & 3) << 3)) & 0xffff;
-+ break;
-+ case 4:
-+ *val = data;
-+ break;
-+ }
-+
-+ return PCIBIOS_SUCCESSFUL;
-+}
-+
-+static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn,
-+ int where, int size, u32 val)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ unsigned long flags;
-+ u32 address;
-+ u32 data;
-+
-+ rpc = pci_bus_to_rt3883_controller(bus);
-+
-+ if (!rpc->pcie_ready && bus->number == 1)
-+ return PCIBIOS_DEVICE_NOT_FOUND;
-+
-+ address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
-+ PCI_FUNC(devfn), where);
-+
-+ spin_lock_irqsave(&rpc->lock, flags);
-+ rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR);
-+ data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA);
-+
-+ switch (size) {
-+ case 1:
-+ data = (data & ~(0xff << ((where & 3) << 3))) |
-+ (val << ((where & 3) << 3));
-+ break;
-+ case 2:
-+ data = (data & ~(0xffff << ((where & 3) << 3))) |
-+ (val << ((where & 3) << 3));
-+ break;
-+ case 4:
-+ data = val;
-+ break;
-+ }
-+
-+ rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA);
-+ spin_unlock_irqrestore(&rpc->lock, flags);
-+
-+ return PCIBIOS_SUCCESSFUL;
-+}
-+
-+static struct pci_ops rt3883_pci_ops = {
-+ .read = rt3883_pci_config_read,
-+ .write = rt3883_pci_config_write,
-+};
-+
-+static void rt3883_pci_preinit(struct rt3883_pci_controller *rpc, unsigned mode)
-+{
-+ u32 syscfg1;
-+ u32 rstctrl;
-+ u32 clkcfg1;
-+ u32 t;
-+
-+ rstctrl = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
-+ syscfg1 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
-+ clkcfg1 = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
-+
-+ if (mode & RT3883_PCI_MODE_PCIE) {
-+ rstctrl |= RT3883_RSTCTRL_PCIE;
-+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
-+
-+ /* setup PCI PAD drive mode */
-+ syscfg1 &= ~(0x30);
-+ syscfg1 |= (2 << 4);
-+ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
-+
-+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+ t &= ~BIT(31);
-+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+
-+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
-+ t &= 0x80ffffff;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
-+
-+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN1);
-+ t |= 0xa << 24;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN1);
-+
-+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+ t |= BIT(31);
-+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+
-+ msleep(50);
-+
-+ rstctrl &= ~RT3883_RSTCTRL_PCIE;
-+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
-+ }
-+
-+ syscfg1 |= (RT3883_SYSCFG1_PCIE_RC_MODE | RT3883_SYSCFG1_PCI_HOST_MODE);
-+
-+ clkcfg1 &= ~(RT3883_CLKCFG1_PCI_CLK_EN | RT3883_CLKCFG1_PCIE_CLK_EN);
-+
-+ if (mode & RT3883_PCI_MODE_PCI) {
-+ clkcfg1 |= RT3883_CLKCFG1_PCI_CLK_EN;
-+ rstctrl &= ~RT3883_RSTCTRL_PCI;
-+ }
-+
-+ if (mode & RT3883_PCI_MODE_PCIE) {
-+ clkcfg1 |= RT3883_CLKCFG1_PCIE_CLK_EN;
-+ rstctrl &= ~RT3883_RSTCTRL_PCIE;
-+ }
-+
-+ rt_sysc_w32(syscfg1, RT3883_SYSC_REG_SYSCFG1);
-+ rt_sysc_w32(rstctrl, RT3883_SYSC_REG_RSTCTRL);
-+ rt_sysc_w32(clkcfg1, RT3883_SYSC_REG_CLKCFG1);
-+
-+ msleep(500);
-+
-+ /*
-+ * setup the device number of the P2P bridge
-+ * and de-assert the reset line
-+ */
-+ t = (RT3883_P2P_BR_DEVNUM << RT3883_PCICFG_P2P_BR_DEVNUM_S);
-+ rt3883_pci_w32(rpc, t, RT3883_PCI_REG_PCICFG);
-+
-+ /* flush write */
-+ rt3883_pci_r32(rpc, RT3883_PCI_REG_PCICFG);
-+ msleep(500);
-+
-+ if (mode & RT3883_PCI_MODE_PCIE) {
-+ msleep(500);
-+
-+ t = rt3883_pci_r32(rpc, RT3883_PCI_REG_STATUS(1));
-+
-+ rpc->pcie_ready = t & BIT(0);
-+
-+ if (!rpc->pcie_ready) {
-+ /* reset the PCIe block */
-+ t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
-+ t |= RT3883_RSTCTRL_PCIE;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
-+ t &= ~RT3883_RSTCTRL_PCIE;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
-+
-+ /* turn off PCIe clock */
-+ t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
-+ t &= ~RT3883_CLKCFG1_PCIE_CLK_EN;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
-+
-+ t = rt_sysc_r32(RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+ t &= ~0xf000c080;
-+ rt_sysc_w32(t, RT3883_SYSC_REG_PCIE_CLK_GEN0);
-+ }
-+ }
-+
-+ /* enable PCI arbiter */
-+ rt3883_pci_w32(rpc, 0x79, RT3883_PCI_REG_ARBCTL);
-+}
-+
-+static int rt3883_pci_probe(struct platform_device *pdev)
-+{
-+ struct rt3883_pci_controller *rpc;
-+ struct device *dev = &pdev->dev;
-+ struct device_node *np = dev->of_node;
-+ struct resource *res;
-+ struct device_node *child;
-+ u32 val;
-+ int err;
-+ int mode;
-+
-+ rpc = devm_kzalloc(dev, sizeof(*rpc), GFP_KERNEL);
-+ if (!rpc)
-+ return -ENOMEM;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!res)
-+ return -EINVAL;
-+
-+ rpc->base = devm_ioremap_resource(dev, res);
-+ if (IS_ERR(rpc->base))
-+ return PTR_ERR(rpc->base);
-+
-+ /* find the interrupt controller child node */
-+ for_each_child_of_node(np, child) {
-+ if (of_get_property(child, "interrupt-controller", NULL) &&
-+ of_node_get(child)) {
-+ rpc->intc_of_node = child;
-+ break;
-+ }
-+ }
-+
-+ if (!rpc->intc_of_node) {
-+ dev_err(dev, "%s has no %s child node",
-+ of_node_full_name(rpc->intc_of_node),
-+ "interrupt controller");
-+ return -EINVAL;
-+ }
-+
-+ /* find the PCI host bridge child node */
-+ for_each_child_of_node(np, child) {
-+ if (child->type &&
-+ of_node_cmp(child->type, "pci") == 0 &&
-+ of_node_get(child)) {
-+ rpc->pci_controller.of_node = child;
-+ break;
-+ }
-+ }
-+
-+ if (!rpc->pci_controller.of_node) {
-+ dev_err(dev, "%s has no %s child node",
-+ of_node_full_name(rpc->intc_of_node),
-+ "PCI host bridge");
-+ err = -EINVAL;
-+ goto err_put_intc_node;
-+ }
-+
-+ mode = RT3883_PCI_MODE_NONE;
-+ for_each_available_child_of_node(rpc->pci_controller.of_node, child) {
-+ int devfn;
-+
-+ if (!child->type ||
-+ of_node_cmp(child->type, "pci") != 0)
-+ continue;
-+
-+ devfn = of_pci_get_devfn(child);
-+ if (devfn < 0)
-+ continue;
-+
-+ switch (PCI_SLOT(devfn)) {
-+ case 1:
-+ mode |= RT3883_PCI_MODE_PCIE;
-+ break;
-+
-+ case 17:
-+ case 18:
-+ mode |= RT3883_PCI_MODE_PCI;
-+ break;
-+ }
-+ }
-+
-+ if (mode == RT3883_PCI_MODE_NONE) {
-+ dev_err(dev, "unable to determine PCI mode\n");
-+ err = -EINVAL;
-+ goto err_put_hb_node;
-+ }
-+
-+ dev_info(dev, "mode:%s%s\n",
-+ (mode & RT3883_PCI_MODE_PCI) ? " PCI" : "",
-+ (mode & RT3883_PCI_MODE_PCIE) ? " PCIe" : "");
-+
-+ rt3883_pci_preinit(rpc, mode);
-+
-+ rpc->pci_controller.pci_ops = &rt3883_pci_ops;
-+ rpc->pci_controller.io_resource = &rpc->io_res;
-+ rpc->pci_controller.mem_resource = &rpc->mem_res;
-+
-+ /* Load PCI I/O and memory resources from DT */
-+ pci_load_of_ranges(&rpc->pci_controller,
-+ rpc->pci_controller.of_node);
-+
-+ rt3883_pci_w32(rpc, rpc->mem_res.start, RT3883_PCI_REG_MEMBASE);
-+ rt3883_pci_w32(rpc, rpc->io_res.start, RT3883_PCI_REG_IOBASE);
-+
-+ ioport_resource.start = rpc->io_res.start;
-+ ioport_resource.end = rpc->io_res.end;
-+
-+ /* PCI */
-+ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(0));
-+ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(0));
-+ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(0));
-+ rt3883_pci_w32(rpc, 0x00800001, RT3883_PCI_REG_CLASS(0));
-+ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(0));
-+
-+ /* PCIe */
-+ rt3883_pci_w32(rpc, 0x03ff0000, RT3883_PCI_REG_BAR0SETUP(1));
-+ rt3883_pci_w32(rpc, RT3883_MEMORY_BASE, RT3883_PCI_REG_IMBASEBAR0(1));
-+ rt3883_pci_w32(rpc, 0x08021814, RT3883_PCI_REG_ID(1));
-+ rt3883_pci_w32(rpc, 0x06040001, RT3883_PCI_REG_CLASS(1));
-+ rt3883_pci_w32(rpc, 0x28801814, RT3883_PCI_REG_SUBID(1));
-+
-+ err = rt3883_pci_irq_init(dev, rpc);
-+ if (err)
-+ goto err_put_hb_node;
-+
-+ /* PCIe */
-+ val = rt3883_pci_read_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND);
-+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
-+ rt3883_pci_write_cfg32(rpc, 0, 0x01, 0, PCI_COMMAND, val);
-+
-+ /* PCI */
-+ val = rt3883_pci_read_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND);
-+ val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
-+ rt3883_pci_write_cfg32(rpc, 0, 0x00, 0, PCI_COMMAND, val);
-+
-+ if (mode == RT3883_PCI_MODE_PCIE) {
-+ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(0));
-+ rt3883_pci_w32(rpc, 0x03ff0001, RT3883_PCI_REG_BAR0SETUP(1));
-+
-+ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
-+ PCI_BASE_ADDRESS_0,
-+ RT3883_MEMORY_BASE);
-+ /* flush write */
-+ rt3883_pci_read_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
-+ PCI_BASE_ADDRESS_0);
-+ } else {
-+ rt3883_pci_write_cfg32(rpc, 0, RT3883_P2P_BR_DEVNUM, 0,
-+ PCI_IO_BASE, 0x00000101);
-+ }
-+
-+ register_pci_controller(&rpc->pci_controller);
-+
-+ return 0;
-+
-+err_put_hb_node:
-+ of_node_put(rpc->pci_controller.of_node);
-+err_put_intc_node:
-+ of_node_put(rpc->intc_of_node);
-+ return err;
-+}
-+
-+int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-+{
-+ struct of_irq dev_irq;
-+ int err;
-+ int irq;
-+
-+ err = of_irq_map_pci(dev, &dev_irq);
-+ if (err) {
-+ pr_err("pci %s: unable to get irq map, err=%d\n",
-+ pci_name((struct pci_dev *) dev), err);
-+ return 0;
-+ }
-+
-+ irq = irq_create_of_mapping(dev_irq.controller,
-+ dev_irq.specifier,
-+ dev_irq.size);
-+
-+ if (irq == 0)
-+ pr_crit("pci %s: no irq found for pin %u\n",
-+ pci_name((struct pci_dev *) dev), pin);
-+ else
-+ pr_info("pci %s: using irq %d for pin %u\n",
-+ pci_name((struct pci_dev *) dev), irq, pin);
-+
-+ return irq;
-+}
-+
-+int pcibios_plat_dev_init(struct pci_dev *dev)
-+{
-+ return 0;
-+}
-+
-+static const struct of_device_id rt3883_pci_ids[] = {
-+ { .compatible = "ralink,rt3883-pci" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, rt3883_pci_ids);
-+
-+static struct platform_driver rt3883_pci_driver = {
-+ .probe = rt3883_pci_probe,
-+ .driver = {
-+ .name = "rt3883-pci",
-+ .owner = THIS_MODULE,
-+ .of_match_table = of_match_ptr(rt3883_pci_ids),
-+ },
-+};
-+
-+static int __init rt3883_pci_init(void)
-+{
-+ return platform_driver_register(&rt3883_pci_driver);
-+}
-+
-+postcore_initcall(rt3883_pci_init);
---- a/arch/mips/ralink/Kconfig
-+++ b/arch/mips/ralink/Kconfig
-@@ -26,6 +26,7 @@ choice
- bool "RT3883"
- select USB_ARCH_HAS_OHCI
- select USB_ARCH_HAS_EHCI
-+ select HW_HAS_PCI
-
- config SOC_MT7620
- bool "MT7620"
generated by cgit v1.1 at 2024-12-25 11:03:52 +0000