diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0009-pci-PCIe-driver-for-Marvell-Armada-370-XP-systems.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0009-pci-PCIe-driver-for-Marvell-Armada-370-XP-systems.patch | 1177 |
1 files changed, 0 insertions, 1177 deletions
diff --git a/target/linux/mvebu/patches-3.10/0009-pci-PCIe-driver-for-Marvell-Armada-370-XP-systems.patch b/target/linux/mvebu/patches-3.10/0009-pci-PCIe-driver-for-Marvell-Armada-370-XP-systems.patch deleted file mode 100644 index 13ddae8c96..0000000000 --- a/target/linux/mvebu/patches-3.10/0009-pci-PCIe-driver-for-Marvell-Armada-370-XP-systems.patch +++ /dev/null @@ -1,1177 +0,0 @@ -From cf7b5cb15e46b5357c60188b75b213a7f0b5fd32 Mon Sep 17 00:00:00 2001 -From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Date: Fri, 18 Jan 2013 17:42:58 +0100 -Subject: [PATCH 009/203] pci: PCIe driver for Marvell Armada 370/XP systems - -This driver implements the support for the PCIe interfaces on the -Marvell Armada 370/XP ARM SoCs. In the future, it might be extended to -cover earlier families of Marvell SoCs, such as Dove, Orion and -Kirkwood. - -The driver implements the hw_pci operations needed by the core ARM PCI -code to setup PCI devices and get their corresponding IRQs, and the -pci_ops operations that are used by the PCI core to read/write the -configuration space of PCI devices. - -Since the PCIe interfaces of Marvell SoCs are completely separate and -not linked together in a bus, this driver sets up an emulated PCI host -bridge, with one PCI-to-PCI bridge as child for each hardware PCIe -interface. - -In addition, this driver enumerates the different PCIe slots, and for -those having a device plugged in, it sets up the necessary address -decoding windows, using the mvebu-mbus driver. - -Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> -Acked-by: Bjorn Helgaas <bhelgaas@google.com> ---- - .../devicetree/bindings/pci/mvebu-pci.txt | 220 ++++++ - drivers/pci/Kconfig | 2 + - drivers/pci/Makefile | 3 + - drivers/pci/host/Kconfig | 8 + - drivers/pci/host/Makefile | 1 + - drivers/pci/host/pci-mvebu.c | 880 +++++++++++++++++++++ - 6 files changed, 1114 insertions(+) - create mode 100644 Documentation/devicetree/bindings/pci/mvebu-pci.txt - create mode 100644 drivers/pci/host/Kconfig - create mode 100644 drivers/pci/host/Makefile - create mode 100644 drivers/pci/host/pci-mvebu.c - ---- /dev/null -+++ b/Documentation/devicetree/bindings/pci/mvebu-pci.txt -@@ -0,0 +1,220 @@ -+* Marvell EBU PCIe interfaces -+ -+Mandatory properties: -+- compatible: one of the following values: -+ marvell,armada-370-pcie -+ marvell,armada-xp-pcie -+- #address-cells, set to <3> -+- #size-cells, set to <2> -+- #interrupt-cells, set to <1> -+- bus-range: PCI bus numbers covered -+- device_type, set to "pci" -+- ranges: ranges for the PCI memory and I/O regions, as well as the -+ MMIO registers to control the PCIe interfaces. -+ -+In addition, the Device Tree node must have sub-nodes describing each -+PCIe interface, having 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. -+- assigned-addresses: reference to the MMIO registers used to control -+ this PCIe interface. -+- clocks: the clock associated to this PCIe interface -+- marvell,pcie-port: the physical PCIe port number -+- status: either "disabled" or "okay" -+- device_type, set to "pci" -+- #address-cells, set to <3> -+- #size-cells, set to <2> -+- #interrupt-cells, set to <1> -+- ranges, empty property. -+- interrupt-map-mask and interrupt-map, standard PCI properties to -+ define the mapping of the PCIe interface to interrupt numbers. -+ -+and the following optional properties: -+- marvell,pcie-lane: the physical PCIe lane number, for ports having -+ multiple lanes. If this property is not found, we assume that the -+ value is 0. -+ -+Example: -+ -+pcie-controller { -+ compatible = "marvell,armada-xp-pcie"; -+ status = "disabled"; -+ device_type = "pci"; -+ -+ #address-cells = <3>; -+ #size-cells = <2>; -+ -+ bus-range = <0x00 0xff>; -+ -+ ranges = <0x82000000 0 0xd0040000 0xd0040000 0 0x00002000 /* Port 0.0 registers */ -+ 0x82000000 0 0xd0042000 0xd0042000 0 0x00002000 /* Port 2.0 registers */ -+ 0x82000000 0 0xd0044000 0xd0044000 0 0x00002000 /* Port 0.1 registers */ -+ 0x82000000 0 0xd0048000 0xd0048000 0 0x00002000 /* Port 0.2 registers */ -+ 0x82000000 0 0xd004c000 0xd004c000 0 0x00002000 /* Port 0.3 registers */ -+ 0x82000000 0 0xd0080000 0xd0080000 0 0x00002000 /* Port 1.0 registers */ -+ 0x82000000 0 0xd0082000 0xd0082000 0 0x00002000 /* Port 3.0 registers */ -+ 0x82000000 0 0xd0084000 0xd0084000 0 0x00002000 /* Port 1.1 registers */ -+ 0x82000000 0 0xd0088000 0xd0088000 0 0x00002000 /* Port 1.2 registers */ -+ 0x82000000 0 0xd008c000 0xd008c000 0 0x00002000 /* Port 1.3 registers */ -+ 0x82000000 0 0xe0000000 0xe0000000 0 0x08000000 /* non-prefetchable memory */ -+ 0x81000000 0 0 0xe8000000 0 0x00100000>; /* downstream I/O */ -+ -+ pcie@1,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82000800 0 0xd0040000 0 0x2000>; -+ reg = <0x0800 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 58>; -+ marvell,pcie-port = <0>; -+ marvell,pcie-lane = <0>; -+ clocks = <&gateclk 5>; -+ status = "disabled"; -+ }; -+ -+ pcie@2,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82001000 0 0xd0044000 0 0x2000>; -+ reg = <0x1000 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 59>; -+ marvell,pcie-port = <0>; -+ marvell,pcie-lane = <1>; -+ clocks = <&gateclk 6>; -+ status = "disabled"; -+ }; -+ -+ pcie@3,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82001800 0 0xd0048000 0 0x2000>; -+ reg = <0x1800 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 60>; -+ marvell,pcie-port = <0>; -+ marvell,pcie-lane = <2>; -+ clocks = <&gateclk 7>; -+ status = "disabled"; -+ }; -+ -+ pcie@4,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82002000 0 0xd004c000 0 0x2000>; -+ reg = <0x2000 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 61>; -+ marvell,pcie-port = <0>; -+ marvell,pcie-lane = <3>; -+ clocks = <&gateclk 8>; -+ status = "disabled"; -+ }; -+ -+ pcie@5,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82002800 0 0xd0080000 0 0x2000>; -+ reg = <0x2800 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 62>; -+ marvell,pcie-port = <1>; -+ marvell,pcie-lane = <0>; -+ clocks = <&gateclk 9>; -+ status = "disabled"; -+ }; -+ -+ pcie@6,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82003000 0 0xd0084000 0 0x2000>; -+ reg = <0x3000 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 63>; -+ marvell,pcie-port = <1>; -+ marvell,pcie-lane = <1>; -+ clocks = <&gateclk 10>; -+ status = "disabled"; -+ }; -+ -+ pcie@7,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82003800 0 0xd0088000 0 0x2000>; -+ reg = <0x3800 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 64>; -+ marvell,pcie-port = <1>; -+ marvell,pcie-lane = <2>; -+ clocks = <&gateclk 11>; -+ status = "disabled"; -+ }; -+ -+ pcie@8,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82004000 0 0xd008c000 0 0x2000>; -+ reg = <0x4000 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 65>; -+ marvell,pcie-port = <1>; -+ marvell,pcie-lane = <3>; -+ clocks = <&gateclk 12>; -+ status = "disabled"; -+ }; -+ pcie@9,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82004800 0 0xd0042000 0 0x2000>; -+ reg = <0x4800 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 99>; -+ marvell,pcie-port = <2>; -+ marvell,pcie-lane = <0>; -+ clocks = <&gateclk 26>; -+ status = "disabled"; -+ }; -+ -+ pcie@10,0 { -+ device_type = "pci"; -+ assigned-addresses = <0x82005000 0 0xd0082000 0 0x2000>; -+ reg = <0x5000 0 0 0 0>; -+ #address-cells = <3>; -+ #size-cells = <2>; -+ #interrupt-cells = <1>; -+ ranges; -+ interrupt-map-mask = <0 0 0 0>; -+ interrupt-map = <0 0 0 0 &mpic 103>; -+ marvell,pcie-port = <3>; -+ marvell,pcie-lane = <0>; -+ clocks = <&gateclk 27>; -+ status = "disabled"; -+ }; -+}; ---- a/drivers/pci/Kconfig -+++ b/drivers/pci/Kconfig -@@ -125,3 +125,5 @@ config PCI_IOAPIC - config PCI_LABEL - def_bool y if (DMI || ACPI) - select NLS -+ -+source "drivers/pci/host/Kconfig" ---- a/drivers/pci/Makefile -+++ b/drivers/pci/Makefile -@@ -67,3 +67,6 @@ obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen - obj-$(CONFIG_OF) += of.o - - ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG -+ -+# PCI host controller drivers -+obj-y += host/ ---- /dev/null -+++ b/drivers/pci/host/Kconfig -@@ -0,0 +1,8 @@ -+menu "PCI host controller drivers" -+ depends on PCI -+ -+config PCI_MVEBU -+ bool "Marvell EBU PCIe controller" -+ depends on ARCH_MVEBU -+ -+endmenu ---- /dev/null -+++ b/drivers/pci/host/Makefile -@@ -0,0 +1 @@ -+obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o ---- /dev/null -+++ b/drivers/pci/host/pci-mvebu.c -@@ -0,0 +1,880 @@ -+/* -+ * PCIe driver for Marvell Armada 370 and Armada XP SoCs -+ * -+ * This file is licensed under the terms of the GNU General Public -+ * License version 2. This program is licensed "as is" without any -+ * warranty of any kind, whether express or implied. -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/pci.h> -+#include <linux/clk.h> -+#include <linux/module.h> -+#include <linux/mbus.h> -+#include <linux/slab.h> -+#include <linux/platform_device.h> -+#include <linux/of_address.h> -+#include <linux/of_pci.h> -+#include <linux/of_irq.h> -+#include <linux/of_platform.h> -+ -+/* -+ * PCIe unit register offsets. -+ */ -+#define PCIE_DEV_ID_OFF 0x0000 -+#define PCIE_CMD_OFF 0x0004 -+#define PCIE_DEV_REV_OFF 0x0008 -+#define PCIE_BAR_LO_OFF(n) (0x0010 + ((n) << 3)) -+#define PCIE_BAR_HI_OFF(n) (0x0014 + ((n) << 3)) -+#define PCIE_HEADER_LOG_4_OFF 0x0128 -+#define PCIE_BAR_CTRL_OFF(n) (0x1804 + (((n) - 1) * 4)) -+#define PCIE_WIN04_CTRL_OFF(n) (0x1820 + ((n) << 4)) -+#define PCIE_WIN04_BASE_OFF(n) (0x1824 + ((n) << 4)) -+#define PCIE_WIN04_REMAP_OFF(n) (0x182c + ((n) << 4)) -+#define PCIE_WIN5_CTRL_OFF 0x1880 -+#define PCIE_WIN5_BASE_OFF 0x1884 -+#define PCIE_WIN5_REMAP_OFF 0x188c -+#define PCIE_CONF_ADDR_OFF 0x18f8 -+#define PCIE_CONF_ADDR_EN 0x80000000 -+#define PCIE_CONF_REG(r) ((((r) & 0xf00) << 16) | ((r) & 0xfc)) -+#define PCIE_CONF_BUS(b) (((b) & 0xff) << 16) -+#define PCIE_CONF_DEV(d) (((d) & 0x1f) << 11) -+#define PCIE_CONF_FUNC(f) (((f) & 0x7) << 8) -+#define PCIE_CONF_ADDR(bus, devfn, where) \ -+ (PCIE_CONF_BUS(bus) | PCIE_CONF_DEV(PCI_SLOT(devfn)) | \ -+ PCIE_CONF_FUNC(PCI_FUNC(devfn)) | PCIE_CONF_REG(where) | \ -+ PCIE_CONF_ADDR_EN) -+#define PCIE_CONF_DATA_OFF 0x18fc -+#define PCIE_MASK_OFF 0x1910 -+#define PCIE_MASK_ENABLE_INTS 0x0f000000 -+#define PCIE_CTRL_OFF 0x1a00 -+#define PCIE_CTRL_X1_MODE 0x0001 -+#define PCIE_STAT_OFF 0x1a04 -+#define PCIE_STAT_BUS 0xff00 -+#define PCIE_STAT_LINK_DOWN BIT(0) -+#define PCIE_DEBUG_CTRL 0x1a60 -+#define PCIE_DEBUG_SOFT_RESET BIT(20) -+ -+/* -+ * This product ID is registered by Marvell, and used when the Marvell -+ * SoC is not the root complex, but an endpoint on the PCIe bus. It is -+ * therefore safe to re-use this PCI ID for our emulated PCI-to-PCI -+ * bridge. -+ */ -+#define MARVELL_EMULATED_PCI_PCI_BRIDGE_ID 0x7846 -+ -+/* PCI configuration space of a PCI-to-PCI bridge */ -+struct mvebu_sw_pci_bridge { -+ u16 vendor; -+ u16 device; -+ u16 command; -+ u16 status; -+ u16 class; -+ u8 interface; -+ u8 revision; -+ u8 bist; -+ u8 header_type; -+ u8 latency_timer; -+ u8 cache_line_size; -+ u32 bar[2]; -+ u8 primary_bus; -+ u8 secondary_bus; -+ u8 subordinate_bus; -+ u8 secondary_latency_timer; -+ u8 iobase; -+ u8 iolimit; -+ u16 secondary_status; -+ u16 membase; -+ u16 memlimit; -+ u16 prefmembase; -+ u16 prefmemlimit; -+ u32 prefbaseupper; -+ u32 preflimitupper; -+ u16 iobaseupper; -+ u16 iolimitupper; -+ u8 cappointer; -+ u8 reserved1; -+ u16 reserved2; -+ u32 romaddr; -+ u8 intline; -+ u8 intpin; -+ u16 bridgectrl; -+}; -+ -+struct mvebu_pcie_port; -+ -+/* Structure representing all PCIe interfaces */ -+struct mvebu_pcie { -+ struct platform_device *pdev; -+ struct mvebu_pcie_port *ports; -+ struct resource io; -+ struct resource realio; -+ struct resource mem; -+ struct resource busn; -+ int nports; -+}; -+ -+/* Structure representing one PCIe interface */ -+struct mvebu_pcie_port { -+ char *name; -+ void __iomem *base; -+ spinlock_t conf_lock; -+ int haslink; -+ u32 port; -+ u32 lane; -+ int devfn; -+ struct clk *clk; -+ struct mvebu_sw_pci_bridge bridge; -+ struct device_node *dn; -+ struct mvebu_pcie *pcie; -+ phys_addr_t memwin_base; -+ size_t memwin_size; -+ phys_addr_t iowin_base; -+ size_t iowin_size; -+}; -+ -+static bool mvebu_pcie_link_up(struct mvebu_pcie_port *port) -+{ -+ return !(readl(port->base + PCIE_STAT_OFF) & PCIE_STAT_LINK_DOWN); -+} -+ -+static void mvebu_pcie_set_local_bus_nr(struct mvebu_pcie_port *port, int nr) -+{ -+ u32 stat; -+ -+ stat = readl(port->base + PCIE_STAT_OFF); -+ stat &= ~PCIE_STAT_BUS; -+ stat |= nr << 8; -+ writel(stat, port->base + PCIE_STAT_OFF); -+} -+ -+/* -+ * Setup PCIE BARs and Address Decode Wins: -+ * BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks -+ * WIN[0-3] -> DRAM bank[0-3] -+ */ -+static void __init mvebu_pcie_setup_wins(struct mvebu_pcie_port *port) -+{ -+ const struct mbus_dram_target_info *dram; -+ u32 size; -+ int i; -+ -+ dram = mv_mbus_dram_info(); -+ -+ /* First, disable and clear BARs and windows. */ -+ for (i = 1; i < 3; i++) { -+ writel(0, port->base + PCIE_BAR_CTRL_OFF(i)); -+ writel(0, port->base + PCIE_BAR_LO_OFF(i)); -+ writel(0, port->base + PCIE_BAR_HI_OFF(i)); -+ } -+ -+ for (i = 0; i < 5; i++) { -+ writel(0, port->base + PCIE_WIN04_CTRL_OFF(i)); -+ writel(0, port->base + PCIE_WIN04_BASE_OFF(i)); -+ writel(0, port->base + PCIE_WIN04_REMAP_OFF(i)); -+ } -+ -+ writel(0, port->base + PCIE_WIN5_CTRL_OFF); -+ writel(0, port->base + PCIE_WIN5_BASE_OFF); -+ writel(0, port->base + PCIE_WIN5_REMAP_OFF); -+ -+ /* Setup windows for DDR banks. Count total DDR size on the fly. */ -+ size = 0; -+ for (i = 0; i < dram->num_cs; i++) { -+ const struct mbus_dram_window *cs = dram->cs + i; -+ -+ writel(cs->base & 0xffff0000, -+ port->base + PCIE_WIN04_BASE_OFF(i)); -+ writel(0, port->base + PCIE_WIN04_REMAP_OFF(i)); -+ writel(((cs->size - 1) & 0xffff0000) | -+ (cs->mbus_attr << 8) | -+ (dram->mbus_dram_target_id << 4) | 1, -+ port->base + PCIE_WIN04_CTRL_OFF(i)); -+ -+ size += cs->size; -+ } -+ -+ /* Round up 'size' to the nearest power of two. */ -+ if ((size & (size - 1)) != 0) -+ size = 1 << fls(size); -+ -+ /* Setup BAR[1] to all DRAM banks. */ -+ writel(dram->cs[0].base, port->base + PCIE_BAR_LO_OFF(1)); -+ writel(0, port->base + PCIE_BAR_HI_OFF(1)); -+ writel(((size - 1) & 0xffff0000) | 1, -+ port->base + PCIE_BAR_CTRL_OFF(1)); -+} -+ -+static void __init mvebu_pcie_setup_hw(struct mvebu_pcie_port *port) -+{ -+ u16 cmd; -+ u32 mask; -+ -+ /* Point PCIe unit MBUS decode windows to DRAM space. */ -+ mvebu_pcie_setup_wins(port); -+ -+ /* Master + slave enable. */ -+ cmd = readw(port->base + PCIE_CMD_OFF); -+ cmd |= PCI_COMMAND_IO; -+ cmd |= PCI_COMMAND_MEMORY; -+ cmd |= PCI_COMMAND_MASTER; -+ writew(cmd, port->base + PCIE_CMD_OFF); -+ -+ /* Enable interrupt lines A-D. */ -+ mask = readl(port->base + PCIE_MASK_OFF); -+ mask |= PCIE_MASK_ENABLE_INTS; -+ writel(mask, port->base + PCIE_MASK_OFF); -+} -+ -+static int mvebu_pcie_hw_rd_conf(struct mvebu_pcie_port *port, -+ struct pci_bus *bus, -+ u32 devfn, int where, int size, u32 *val) -+{ -+ writel(PCIE_CONF_ADDR(bus->number, devfn, where), -+ port->base + PCIE_CONF_ADDR_OFF); -+ -+ *val = readl(port->base + PCIE_CONF_DATA_OFF); -+ -+ if (size == 1) -+ *val = (*val >> (8 * (where & 3))) & 0xff; -+ else if (size == 2) -+ *val = (*val >> (8 * (where & 3))) & 0xffff; -+ -+ return PCIBIOS_SUCCESSFUL; -+} -+ -+static int mvebu_pcie_hw_wr_conf(struct mvebu_pcie_port *port, -+ struct pci_bus *bus, -+ u32 devfn, int where, int size, u32 val) -+{ -+ int ret = PCIBIOS_SUCCESSFUL; -+ -+ writel(PCIE_CONF_ADDR(bus->number, devfn, where), -+ port->base + PCIE_CONF_ADDR_OFF); -+ -+ if (size == 4) -+ writel(val, port->base + PCIE_CONF_DATA_OFF); -+ else if (size == 2) -+ writew(val, port->base + PCIE_CONF_DATA_OFF + (where & 3)); -+ else if (size == 1) -+ writeb(val, port->base + PCIE_CONF_DATA_OFF + (where & 3)); -+ else -+ ret = PCIBIOS_BAD_REGISTER_NUMBER; -+ -+ return ret; -+} -+ -+static void mvebu_pcie_handle_iobase_change(struct mvebu_pcie_port *port) -+{ -+ phys_addr_t iobase; -+ -+ /* Are the new iobase/iolimit values invalid? */ -+ if (port->bridge.iolimit < port->bridge.iobase || -+ port->bridge.iolimitupper < port->bridge.iobaseupper) { -+ -+ /* If a window was configured, remove it */ -+ if (port->iowin_base) { -+ mvebu_mbus_del_window(port->iowin_base, -+ port->iowin_size); -+ port->iowin_base = 0; -+ port->iowin_size = 0; -+ } -+ -+ return; -+ } -+ -+ /* -+ * We read the PCI-to-PCI bridge emulated registers, and -+ * calculate the base address and size of the address decoding -+ * window to setup, according to the PCI-to-PCI bridge -+ * specifications. iobase is the bus address, port->iowin_base -+ * is the CPU address. -+ */ -+ iobase = ((port->bridge.iobase & 0xF0) << 8) | -+ (port->bridge.iobaseupper << 16); -+ port->iowin_base = port->pcie->io.start + iobase; -+ port->iowin_size = ((0xFFF | ((port->bridge.iolimit & 0xF0) << 8) | -+ (port->bridge.iolimitupper << 16)) - -+ iobase); -+ -+ mvebu_mbus_add_window_remap_flags(port->name, port->iowin_base, -+ port->iowin_size, -+ iobase, -+ MVEBU_MBUS_PCI_IO); -+ -+ pci_ioremap_io(iobase, port->iowin_base); -+} -+ -+static void mvebu_pcie_handle_membase_change(struct mvebu_pcie_port *port) -+{ -+ /* Are the new membase/memlimit values invalid? */ -+ if (port->bridge.memlimit < port->bridge.membase) { -+ -+ /* If a window was configured, remove it */ -+ if (port->memwin_base) { -+ mvebu_mbus_del_window(port->memwin_base, -+ port->memwin_size); -+ port->memwin_base = 0; -+ port->memwin_size = 0; -+ } -+ -+ return; -+ } -+ -+ /* -+ * We read the PCI-to-PCI bridge emulated registers, and -+ * calculate the base address and size of the address decoding -+ * window to setup, according to the PCI-to-PCI bridge -+ * specifications. -+ */ -+ port->memwin_base = ((port->bridge.membase & 0xFFF0) << 16); -+ port->memwin_size = -+ (((port->bridge.memlimit & 0xFFF0) << 16) | 0xFFFFF) - -+ port->memwin_base; -+ -+ mvebu_mbus_add_window_remap_flags(port->name, port->memwin_base, -+ port->memwin_size, -+ MVEBU_MBUS_NO_REMAP, -+ MVEBU_MBUS_PCI_MEM); -+} -+ -+/* -+ * Initialize the configuration space of the PCI-to-PCI bridge -+ * associated with the given PCIe interface. -+ */ -+static void mvebu_sw_pci_bridge_init(struct mvebu_pcie_port *port) -+{ -+ struct mvebu_sw_pci_bridge *bridge = &port->bridge; -+ -+ memset(bridge, 0, sizeof(struct mvebu_sw_pci_bridge)); -+ -+ bridge->status = PCI_STATUS_CAP_LIST; -+ bridge->class = PCI_CLASS_BRIDGE_PCI; -+ bridge->vendor = PCI_VENDOR_ID_MARVELL; -+ bridge->device = MARVELL_EMULATED_PCI_PCI_BRIDGE_ID; -+ bridge->header_type = PCI_HEADER_TYPE_BRIDGE; -+ bridge->cache_line_size = 0x10; -+ -+ /* We support 32 bits I/O addressing */ -+ bridge->iobase = PCI_IO_RANGE_TYPE_32; -+ bridge->iolimit = PCI_IO_RANGE_TYPE_32; -+} -+ -+/* -+ * Read the configuration space of the PCI-to-PCI bridge associated to -+ * the given PCIe interface. -+ */ -+static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port, -+ unsigned int where, int size, u32 *value) -+{ -+ struct mvebu_sw_pci_bridge *bridge = &port->bridge; -+ -+ switch (where & ~3) { -+ case PCI_VENDOR_ID: -+ *value = bridge->device << 16 | bridge->vendor; -+ break; -+ -+ case PCI_COMMAND: -+ *value = bridge->status << 16 | bridge->command; -+ break; -+ -+ case PCI_CLASS_REVISION: -+ *value = bridge->class << 16 | bridge->interface << 8 | -+ bridge->revision; -+ break; -+ -+ case PCI_CACHE_LINE_SIZE: -+ *value = bridge->bist << 24 | bridge->header_type << 16 | -+ bridge->latency_timer << 8 | bridge->cache_line_size; -+ break; -+ -+ case PCI_BASE_ADDRESS_0 ... PCI_BASE_ADDRESS_1: -+ *value = bridge->bar[((where & ~3) - PCI_BASE_ADDRESS_0) / 4]; -+ break; -+ -+ case PCI_PRIMARY_BUS: -+ *value = (bridge->secondary_latency_timer << 24 | -+ bridge->subordinate_bus << 16 | -+ bridge->secondary_bus << 8 | -+ bridge->primary_bus); -+ break; -+ -+ case PCI_IO_BASE: -+ *value = (bridge->secondary_status << 16 | -+ bridge->iolimit << 8 | -+ bridge->iobase); -+ break; -+ -+ case PCI_MEMORY_BASE: -+ *value = (bridge->memlimit << 16 | bridge->membase); -+ break; -+ -+ case PCI_PREF_MEMORY_BASE: -+ *value = (bridge->prefmemlimit << 16 | bridge->prefmembase); -+ break; -+ -+ case PCI_PREF_BASE_UPPER32: -+ *value = bridge->prefbaseupper; -+ break; -+ -+ case PCI_PREF_LIMIT_UPPER32: -+ *value = bridge->preflimitupper; -+ break; -+ -+ case PCI_IO_BASE_UPPER16: -+ *value = (bridge->iolimitupper << 16 | bridge->iobaseupper); -+ break; -+ -+ case PCI_ROM_ADDRESS1: -+ *value = 0; -+ break; -+ -+ default: -+ *value = 0xffffffff; -+ return PCIBIOS_BAD_REGISTER_NUMBER; -+ } -+ -+ if (size == 2) -+ *value = (*value >> (8 * (where & 3))) & 0xffff; -+ else if (size == 1) -+ *value = (*value >> (8 * (where & 3))) & 0xff; -+ -+ return PCIBIOS_SUCCESSFUL; -+} -+ -+/* Write to the PCI-to-PCI bridge configuration space */ -+static int mvebu_sw_pci_bridge_write(struct mvebu_pcie_port *port, -+ unsigned int where, int size, u32 value) -+{ -+ struct mvebu_sw_pci_bridge *bridge = &port->bridge; -+ u32 mask, reg; -+ int err; -+ -+ if (size == 4) -+ mask = 0x0; -+ else if (size == 2) -+ mask = ~(0xffff << ((where & 3) * 8)); -+ else if (size == 1) -+ mask = ~(0xff << ((where & 3) * 8)); -+ else -+ return PCIBIOS_BAD_REGISTER_NUMBER; -+ -+ err = mvebu_sw_pci_bridge_read(port, where & ~3, 4, ®); -+ if (err) -+ return err; -+ -+ value = (reg & mask) | value << ((where & 3) * 8); -+ -+ switch (where & ~3) { -+ case PCI_COMMAND: -+ bridge->command = value & 0xffff; -+ bridge->status = value >> 16; -+ break; -+ -+ case PCI_BASE_ADDRESS_0 ... PCI_BASE_ADDRESS_1: -+ bridge->bar[((where & ~3) - PCI_BASE_ADDRESS_0) / 4] = value; -+ break; -+ -+ case PCI_IO_BASE: -+ /* -+ * We also keep bit 1 set, it is a read-only bit that -+ * indicates we support 32 bits addressing for the -+ * I/O -+ */ -+ bridge->iobase = (value & 0xff) | PCI_IO_RANGE_TYPE_32; -+ bridge->iolimit = ((value >> 8) & 0xff) | PCI_IO_RANGE_TYPE_32; -+ bridge->secondary_status = value >> 16; -+ mvebu_pcie_handle_iobase_change(port); -+ break; -+ -+ case PCI_MEMORY_BASE: -+ bridge->membase = value & 0xffff; -+ bridge->memlimit = value >> 16; -+ mvebu_pcie_handle_membase_change(port); -+ break; -+ -+ case PCI_PREF_MEMORY_BASE: -+ bridge->prefmembase = value & 0xffff; -+ bridge->prefmemlimit = value >> 16; -+ break; -+ -+ case PCI_PREF_BASE_UPPER32: -+ bridge->prefbaseupper = value; -+ break; -+ -+ case PCI_PREF_LIMIT_UPPER32: -+ bridge->preflimitupper = value; -+ break; -+ -+ case PCI_IO_BASE_UPPER16: -+ bridge->iobaseupper = value & 0xffff; -+ bridge->iolimitupper = value >> 16; -+ mvebu_pcie_handle_iobase_change(port); -+ break; -+ -+ case PCI_PRIMARY_BUS: -+ bridge->primary_bus = value & 0xff; -+ bridge->secondary_bus = (value >> 8) & 0xff; -+ bridge->subordinate_bus = (value >> 16) & 0xff; -+ bridge->secondary_latency_timer = (value >> 24) & 0xff; -+ mvebu_pcie_set_local_bus_nr(port, bridge->secondary_bus); -+ break; -+ -+ default: -+ break; -+ } -+ -+ return PCIBIOS_SUCCESSFUL; -+} -+ -+static inline struct mvebu_pcie *sys_to_pcie(struct pci_sys_data *sys) -+{ -+ return sys->private_data; -+} -+ -+static struct mvebu_pcie_port * -+mvebu_pcie_find_port(struct mvebu_pcie *pcie, struct pci_bus *bus, -+ int devfn) -+{ -+ int i; -+ -+ for (i = 0; i < pcie->nports; i++) { -+ struct mvebu_pcie_port *port = &pcie->ports[i]; -+ if (bus->number == 0 && port->devfn == devfn) -+ return port; -+ if (bus->number != 0 && -+ port->bridge.secondary_bus == bus->number) -+ return port; -+ } -+ -+ return NULL; -+} -+ -+/* PCI configuration space write function */ -+static int mvebu_pcie_wr_conf(struct pci_bus *bus, u32 devfn, -+ int where, int size, u32 val) -+{ -+ struct mvebu_pcie *pcie = sys_to_pcie(bus->sysdata); -+ struct mvebu_pcie_port *port; -+ unsigned long flags; -+ int ret; -+ -+ port = mvebu_pcie_find_port(pcie, bus, devfn); -+ if (!port) -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ -+ /* Access the emulated PCI-to-PCI bridge */ -+ if (bus->number == 0) -+ return mvebu_sw_pci_bridge_write(port, where, size, val); -+ -+ if (!port->haslink || PCI_SLOT(devfn) != 0) -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ -+ /* Access the real PCIe interface */ -+ spin_lock_irqsave(&port->conf_lock, flags); -+ ret = mvebu_pcie_hw_wr_conf(port, bus, -+ PCI_DEVFN(1, PCI_FUNC(devfn)), -+ where, size, val); -+ spin_unlock_irqrestore(&port->conf_lock, flags); -+ -+ return ret; -+} -+ -+/* PCI configuration space read function */ -+static int mvebu_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, -+ int size, u32 *val) -+{ -+ struct mvebu_pcie *pcie = sys_to_pcie(bus->sysdata); -+ struct mvebu_pcie_port *port; -+ unsigned long flags; -+ int ret; -+ -+ port = mvebu_pcie_find_port(pcie, bus, devfn); -+ if (!port) { -+ *val = 0xffffffff; -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ } -+ -+ /* Access the emulated PCI-to-PCI bridge */ -+ if (bus->number == 0) -+ return mvebu_sw_pci_bridge_read(port, where, size, val); -+ -+ if (!port->haslink || PCI_SLOT(devfn) != 0) { -+ *val = 0xffffffff; -+ return PCIBIOS_DEVICE_NOT_FOUND; -+ } -+ -+ /* Access the real PCIe interface */ -+ spin_lock_irqsave(&port->conf_lock, flags); -+ ret = mvebu_pcie_hw_rd_conf(port, bus, -+ PCI_DEVFN(1, PCI_FUNC(devfn)), -+ where, size, val); -+ spin_unlock_irqrestore(&port->conf_lock, flags); -+ -+ return ret; -+} -+ -+static struct pci_ops mvebu_pcie_ops = { -+ .read = mvebu_pcie_rd_conf, -+ .write = mvebu_pcie_wr_conf, -+}; -+ -+static int __init mvebu_pcie_setup(int nr, struct pci_sys_data *sys) -+{ -+ struct mvebu_pcie *pcie = sys_to_pcie(sys); -+ int i; -+ -+ pci_add_resource_offset(&sys->resources, &pcie->realio, sys->io_offset); -+ pci_add_resource_offset(&sys->resources, &pcie->mem, sys->mem_offset); -+ pci_add_resource(&sys->resources, &pcie->busn); -+ -+ for (i = 0; i < pcie->nports; i++) { -+ struct mvebu_pcie_port *port = &pcie->ports[i]; -+ mvebu_pcie_setup_hw(port); -+ } -+ -+ return 1; -+} -+ -+static int __init mvebu_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) -+{ -+ struct of_irq oirq; -+ int ret; -+ -+ ret = of_irq_map_pci(dev, &oirq); -+ if (ret) -+ return ret; -+ -+ return irq_create_of_mapping(oirq.controller, oirq.specifier, -+ oirq.size); -+} -+ -+static struct pci_bus *mvebu_pcie_scan_bus(int nr, struct pci_sys_data *sys) -+{ -+ struct mvebu_pcie *pcie = sys_to_pcie(sys); -+ struct pci_bus *bus; -+ -+ bus = pci_create_root_bus(&pcie->pdev->dev, sys->busnr, -+ &mvebu_pcie_ops, sys, &sys->resources); -+ if (!bus) -+ return NULL; -+ -+ pci_scan_child_bus(bus); -+ -+ return bus; -+} -+ -+resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev, -+ const struct resource *res, -+ resource_size_t start, -+ resource_size_t size, -+ resource_size_t align) -+{ -+ if (dev->bus->number != 0) -+ return start; -+ -+ /* -+ * On the PCI-to-PCI bridge side, the I/O windows must have at -+ * least a 64 KB size and be aligned on their size, and the -+ * memory windows must have at least a 1 MB size and be -+ * aligned on their size -+ */ -+ if (res->flags & IORESOURCE_IO) -+ return round_up(start, max((resource_size_t)SZ_64K, size)); -+ else if (res->flags & IORESOURCE_MEM) -+ return round_up(start, max((resource_size_t)SZ_1M, size)); -+ else -+ return start; -+} -+ -+static void __init mvebu_pcie_enable(struct mvebu_pcie *pcie) -+{ -+ struct hw_pci hw; -+ -+ memset(&hw, 0, sizeof(hw)); -+ -+ hw.nr_controllers = 1; -+ hw.private_data = (void **)&pcie; -+ hw.setup = mvebu_pcie_setup; -+ hw.scan = mvebu_pcie_scan_bus; -+ hw.map_irq = mvebu_pcie_map_irq; -+ hw.ops = &mvebu_pcie_ops; -+ hw.align_resource = mvebu_pcie_align_resource; -+ -+ pci_common_init(&hw); -+} -+ -+/* -+ * Looks up the list of register addresses encoded into the reg = -+ * <...> property for one that matches the given port/lane. Once -+ * found, maps it. -+ */ -+static void __iomem * __init -+mvebu_pcie_map_registers(struct platform_device *pdev, -+ struct device_node *np, -+ struct mvebu_pcie_port *port) -+{ -+ struct resource regs; -+ int ret = 0; -+ -+ ret = of_address_to_resource(np, 0, ®s); -+ if (ret) -+ return NULL; -+ -+ return devm_request_and_ioremap(&pdev->dev, ®s); -+} -+ -+static int __init mvebu_pcie_probe(struct platform_device *pdev) -+{ -+ struct mvebu_pcie *pcie; -+ struct device_node *np = pdev->dev.of_node; -+ struct of_pci_range range; -+ struct of_pci_range_parser parser; -+ struct device_node *child; -+ int i, ret; -+ -+ pcie = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pcie), -+ GFP_KERNEL); -+ if (!pcie) -+ return -ENOMEM; -+ -+ pcie->pdev = pdev; -+ -+ if (of_pci_range_parser_init(&parser, np)) -+ return -EINVAL; -+ -+ /* Get the I/O and memory ranges from DT */ -+ for_each_of_pci_range(&parser, &range) { -+ unsigned long restype = range.flags & IORESOURCE_TYPE_BITS; -+ if (restype == IORESOURCE_IO) { -+ of_pci_range_to_resource(&range, np, &pcie->io); -+ of_pci_range_to_resource(&range, np, &pcie->realio); -+ pcie->io.name = "I/O"; -+ pcie->realio.start = max_t(resource_size_t, -+ PCIBIOS_MIN_IO, -+ range.pci_addr); -+ pcie->realio.end = min_t(resource_size_t, -+ IO_SPACE_LIMIT, -+ range.pci_addr + range.size); -+ } -+ if (restype == IORESOURCE_MEM) { -+ of_pci_range_to_resource(&range, np, &pcie->mem); -+ pcie->mem.name = "MEM"; -+ } -+ } -+ -+ /* Get the bus range */ -+ ret = of_pci_parse_bus_range(np, &pcie->busn); -+ if (ret) { -+ dev_err(&pdev->dev, "failed to parse bus-range property: %d\n", -+ ret); -+ return ret; -+ } -+ -+ for_each_child_of_node(pdev->dev.of_node, child) { -+ if (!of_device_is_available(child)) -+ continue; -+ pcie->nports++; -+ } -+ -+ pcie->ports = devm_kzalloc(&pdev->dev, pcie->nports * -+ sizeof(struct mvebu_pcie_port), -+ GFP_KERNEL); -+ if (!pcie->ports) -+ return -ENOMEM; -+ -+ i = 0; -+ for_each_child_of_node(pdev->dev.of_node, child) { -+ struct mvebu_pcie_port *port = &pcie->ports[i]; -+ -+ if (!of_device_is_available(child)) -+ continue; -+ -+ port->pcie = pcie; -+ -+ if (of_property_read_u32(child, "marvell,pcie-port", -+ &port->port)) { -+ dev_warn(&pdev->dev, -+ "ignoring PCIe DT node, missing pcie-port property\n"); -+ continue; -+ } -+ -+ if (of_property_read_u32(child, "marvell,pcie-lane", -+ &port->lane)) -+ port->lane = 0; -+ -+ port->name = kasprintf(GFP_KERNEL, "pcie%d.%d", -+ port->port, port->lane); -+ -+ port->devfn = of_pci_get_devfn(child); -+ if (port->devfn < 0) -+ continue; -+ -+ port->base = mvebu_pcie_map_registers(pdev, child, port); -+ if (!port->base) { -+ dev_err(&pdev->dev, "PCIe%d.%d: cannot map registers\n", -+ port->port, port->lane); -+ continue; -+ } -+ -+ if (mvebu_pcie_link_up(port)) { -+ port->haslink = 1; -+ dev_info(&pdev->dev, "PCIe%d.%d: link up\n", -+ port->port, port->lane); -+ } else { -+ port->haslink = 0; -+ dev_info(&pdev->dev, "PCIe%d.%d: link down\n", -+ port->port, port->lane); -+ } -+ -+ port->clk = of_clk_get_by_name(child, NULL); -+ if (!port->clk) { -+ dev_err(&pdev->dev, "PCIe%d.%d: cannot get clock\n", -+ port->port, port->lane); -+ iounmap(port->base); -+ port->haslink = 0; -+ continue; -+ } -+ -+ port->dn = child; -+ -+ clk_prepare_enable(port->clk); -+ spin_lock_init(&port->conf_lock); -+ -+ mvebu_sw_pci_bridge_init(port); -+ -+ i++; -+ } -+ -+ mvebu_pcie_enable(pcie); -+ -+ return 0; -+} -+ -+static const struct of_device_id mvebu_pcie_of_match_table[] = { -+ { .compatible = "marvell,armada-xp-pcie", }, -+ { .compatible = "marvell,armada-370-pcie", }, -+ {}, -+}; -+MODULE_DEVICE_TABLE(of, mvebu_pcie_of_match_table); -+ -+static struct platform_driver mvebu_pcie_driver = { -+ .driver = { -+ .owner = THIS_MODULE, -+ .name = "mvebu-pcie", -+ .of_match_table = -+ of_match_ptr(mvebu_pcie_of_match_table), -+ }, -+}; -+ -+static int __init mvebu_pcie_init(void) -+{ -+ return platform_driver_probe(&mvebu_pcie_driver, -+ mvebu_pcie_probe); -+} -+ -+subsys_initcall(mvebu_pcie_init); -+ -+MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>"); -+MODULE_DESCRIPTION("Marvell EBU PCIe driver"); -+MODULE_LICENSE("GPLv2"); |