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-rw-r--r--target/linux/mediatek/patches/0064-arm-mediatek-add-mt7623-pcie-support.patch436
1 files changed, 436 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches/0064-arm-mediatek-add-mt7623-pcie-support.patch b/target/linux/mediatek/patches/0064-arm-mediatek-add-mt7623-pcie-support.patch
new file mode 100644
index 0000000..ee82f9c
--- /dev/null
+++ b/target/linux/mediatek/patches/0064-arm-mediatek-add-mt7623-pcie-support.patch
@@ -0,0 +1,436 @@
+From 29ceb2449cb3622ccfba9eb1c77bf2ac4162464b Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sat, 27 Jun 2015 13:15:29 +0200
+Subject: [PATCH 64/76] arm: mediatek: add mt7623 pcie support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/arm/mach-mediatek/Makefile | 2 +-
+ arch/arm/mach-mediatek/pcie.c | 383 +++++++++++++++++++++++++++++++++++++++
+ arch/arm/mach-mediatek/pcie.h | 14 ++
+ 3 files changed, 398 insertions(+), 1 deletion(-)
+ create mode 100644 arch/arm/mach-mediatek/pcie.c
+ create mode 100644 arch/arm/mach-mediatek/pcie.h
+
+diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile
+index 2116460..aca28a2 100644
+--- a/arch/arm/mach-mediatek/Makefile
++++ b/arch/arm/mach-mediatek/Makefile
+@@ -1,4 +1,4 @@
+ ifeq ($(CONFIG_SMP),y)
+ obj-$(CONFIG_ARCH_MEDIATEK) += platsmp.o
+ endif
+-obj-$(CONFIG_ARCH_MEDIATEK) += mediatek.o
++obj-$(CONFIG_ARCH_MEDIATEK) += mediatek.o pcie.o
+diff --git a/arch/arm/mach-mediatek/pcie.c b/arch/arm/mach-mediatek/pcie.c
+new file mode 100644
+index 0000000..8394712
+--- /dev/null
++++ b/arch/arm/mach-mediatek/pcie.c
+@@ -0,0 +1,383 @@
++/*
++ * Mediatek MT7623 SoC PCIE support
++ *
++ * Copyright (C) 2015 Mediatek
++ * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
++ *
++ * 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/kernel.h>
++#include <linux/pci.h>
++#include <linux/ioport.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/delay.h>
++#include <asm/irq.h>
++#include <asm/mach/pci.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_irq.h>
++#include <linux/of_pci.h>
++#include <linux/reset.h>
++#include <linux/platform_device.h>
++
++#include "pcie.h"
++
++#define PCICFG 0x00
++#define PCIINT 0x08
++#define PCIENA 0x0C
++#define CFGADDR 0x20
++#define CFGDATA 0x24
++#define MEMBASE 0x28
++#define IOBASE 0x2C
++
++#define BAR0SETUP 0x10
++#define IMBASEBAR0 0x18
++#define PCIE_CLASS 0x34
++#define PCIE_SISTAT 0x50
++
++#define MTK_PCIE_HIGH_PERF BIT(14)
++#define PCIEP0_BASE 0x2000
++#define PCIEP1_BASE 0x3000
++#define PCIEP2_BASE 0x4000
++
++#define PHY_P0_CTL 0x9000
++#define PHY_P1_CTL 0xA000
++#define PHY_P2_CTL 0x4000
++
++#define RSTCTL_PCIE0_RST BIT(24)
++#define RSTCTL_PCIE1_RST BIT(25)
++#define RSTCTL_PCIE2_RST BIT(26)
++
++static void __iomem *pcie_base;
++static int pcie_card_link;
++
++static struct mtk_pcie_port {
++ int id;
++ int enable;
++ u32 base;
++ u32 phy_base;
++ u32 perst_n;
++ u32 reset;
++ u32 interrupt;
++ u32 link;
++} mtk_pcie_port[] = {
++ { 0, 1, PCIEP0_BASE, PHY_P0_CTL, BIT(1), RSTCTL_PCIE0_RST, BIT(20) },
++ { 1, 1, PCIEP1_BASE, PHY_P1_CTL, BIT(2), RSTCTL_PCIE1_RST, BIT(21) },
++ { 2, 0, PCIEP2_BASE, PHY_P2_CTL, BIT(3), RSTCTL_PCIE2_RST, BIT(22) },
++};
++
++#define mtk_foreach_port(p) \
++ for (p = mtk_pcie_port; p != &mtk_pcie_port[ARRAY_SIZE(mtk_pcie_port)]; p++)
++
++#define mtk_foreach_port_enabled(p) \
++ mtk_foreach_port(p) \
++ if (p->enable)
++
++#define mtk_foreach_port_link(p) \
++ mtk_foreach_port(p) \
++ if (p->link)
++
++static struct mtk_phy_init {
++ uint32_t reg;
++ uint32_t mask;
++ uint32_t val;
++} mtk_phy_init[] = {
++ { 0xC00, 0x33000, 0x22000 },
++ { 0xB04, 0xe0000000, 0x40000000 },
++ { 0xB00, 0xe, 0x4 },
++ { 0xC3C, 0xffff0000, 0x3c0000 },
++ { 0xC48, 0xffff, 0x36 },
++ { 0xC0C, 0x30000000, 0x10000000 },
++ { 0xC08, 0x3800c0, 0xc0 },
++ { 0xC10, 0xf0000, 0x20000 },
++ { 0xC0C, 0xf000, 0x1000 },
++ { 0xC14, 0xf0000, 0xa0000 },
++};
++
++static inline void pcie_w32(u32 val, unsigned reg)
++{
++ iowrite32(val, pcie_base + reg);
++}
++
++static inline u32 pcie_r32(unsigned reg)
++{
++ return ioread32(pcie_base + reg);
++}
++
++static inline void pcie_m32(u32 mask, u32 val, unsigned reg)
++{
++ u32 v = pcie_r32(reg);
++
++ v &= mask;
++ v |= val;
++ pcie_w32(v, reg);
++}
++
++static int pcie_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val)
++{
++ unsigned int slot = PCI_SLOT(devfn);
++ u8 func = PCI_FUNC(devfn);
++ u32 address;
++ u32 data;
++ u32 num = 0;
++
++ if (bus)
++ num = bus->number;
++
++ address = (((where & 0xF00) >> 8) << 24) | (num << 16) | (slot << 11) | (func << 8) | (where & 0xfc);
++ pcie_m32(0xf0000000, address, CFGADDR);
++ data = pcie_r32(CFGDATA);
++
++ 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 pcie_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
++{
++ unsigned int slot = PCI_SLOT(devfn);
++ u8 func = PCI_FUNC(devfn);
++ u32 address;
++ u32 data;
++ u32 num = 0;
++
++ if (bus)
++ num = bus->number;
++
++ address = (((where & 0xF00) >> 8) << 24) | (num << 16) | (slot << 11) | (func << 8) | (where & 0xfc);
++ pcie_m32(0xf0000000, address, CFGADDR);
++ data = pcie_r32(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;
++ }
++
++ pcie_w32(data, CFGDATA);
++
++ return PCIBIOS_SUCCESSFUL;
++}
++
++static struct pci_ops mtk_pcie_ops = {
++ .read = pcie_config_read,
++ .write = pcie_config_write,
++};
++
++static struct resource pci_mem = {
++ .name = "PCIe Memory space",
++ .start = MEM_DIRECT1,
++ .end = (u32) (MEM_DIRECT1 + (unsigned char *) 0x0fffffff),
++ .flags = IORESOURCE_MEM,
++};
++
++static struct resource pci_io = {
++ .name = "PCIe IO space",
++ .start = IO_WIN,
++ .end = (u32) (IO_WIN + (unsigned char *) 0x0ffff),
++ .flags = IORESOURCE_IO,
++};
++
++static int __init mtk_pcie_setup(int nr, struct pci_sys_data *sys)
++{
++ sys->mem_offset = 0;
++ sys->io_offset = 0;
++
++ request_resource(&ioport_resource, &pci_io);
++ request_resource(&iomem_resource, &pci_mem);
++
++ pci_add_resource_offset(&sys->resources, &pci_io, sys->io_offset);
++ pci_add_resource_offset(&sys->resources, &pci_mem, sys->mem_offset);
++
++ return 1;
++}
++
++static struct pci_bus * __init mtk_pcie_scan_bus(int nr, struct pci_sys_data *sys)
++{
++ return pci_scan_root_bus(NULL, sys->busnr, &mtk_pcie_ops, sys,
++ &sys->resources);
++}
++
++static int __init mtk_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
++{
++ u16 cmd;
++ u32 val;
++
++ if (dev->bus->number == 0) {
++ pcie_config_write(NULL, slot, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
++ pcie_config_read(NULL, slot, 0, PCI_BASE_ADDRESS_0, &val);
++ printk("BAR0 at bus %d, slot %d\n", dev->bus->number, slot);
++ }
++
++ printk("bus=0x%x, slot = 0x%x, pin=0x%x, irq=0x%x\n", dev->bus->number, slot, pin, dev->irq);
++
++ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x14);
++ pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xFF);
++ pci_read_config_word(dev, PCI_COMMAND, &cmd);
++ cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
++ pci_write_config_word(dev, PCI_COMMAND, cmd);
++ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
++
++ return dev->irq;
++}
++
++static void __init mtk_pcie_preinit(void)
++{
++ struct mtk_pcie_port *port;
++ u32 val = 0;
++ int i;
++
++ pcibios_min_io = 0;
++ pcibios_min_mem = 0;
++
++#if defined (CONFIG_PCIE_PORT2)
++ printk("%s: PCIe/USB3 combo PHY mode (%x) =%x\n", __func__, SYSCFG1, REGDATA(SYSCFG1));
++ REGDATA(SYSCFG1) &= ~(0x300000);
++ printk("%s: PCIe/USB3 combo PHY mode (%x) =%x\n", __func__, SYSCFG1, REGDATA(SYSCFG1));
++#endif
++
++ /* PCIe RC Reset */
++ val = 0;
++ mtk_foreach_port_enabled(port)
++ val |= port->reset;
++ REGDATA(RSTCTL) |= val;
++ mdelay(10);
++ REGDATA(RSTCTL) &= ~val;
++ mdelay(10);
++
++ /* Configure PCIe PHY */
++ mtk_foreach_port_enabled(port) {
++ for (i = 0; i < ARRAY_SIZE(mtk_phy_init); i++) {
++ u32 val = pcie_r32(port->phy_base + mtk_phy_init[i].reg);
++ val &= ~mtk_phy_init[i].mask;
++ val |= mtk_phy_init[i].val;
++ pcie_w32(val, port->phy_base + mtk_phy_init[i].reg);
++ }
++ mdelay(10);
++ }
++
++ /* Enable RC */
++ mtk_foreach_port_enabled(port) {
++ val = 0;
++ pcie_config_read(NULL, port->id, 0, 0x73c, &val);
++ val &= ~(0x9fff)<<16;
++ val |= 0x806c<<16;
++ pcie_config_write(NULL, port->id, 0, 0x73c, val);
++ }
++
++ /* PCIe EP reset */
++ val = 0;
++ mtk_foreach_port_enabled(port)
++ val |= port->perst_n;
++ val |= MTK_PCIE_HIGH_PERF;
++ pcie_w32(pcie_r32(PCICFG) | val, PCICFG);
++ mdelay(10);
++ pcie_w32(pcie_r32(PCICFG) & ~val, PCICFG);
++ mdelay(10);
++
++ /* check the link status */
++ val = 0;
++ mtk_foreach_port_enabled(port) {
++ if ((pcie_r32(port->base + PCIE_SISTAT) & 0x1))
++ port->link = 1;
++ else
++ val |= port->reset;
++ }
++ REGDATA(RSTCTL) |= val;
++
++ mtk_foreach_port_link(port)
++ pcie_card_link++;
++
++ printk("PCIe Link count = %d\n", pcie_card_link);
++ if (!pcie_card_link)
++ return;
++
++ pcie_w32(MEM_WIN, MEMBASE);
++ pcie_w32(IO_WIN, IOBASE);
++
++ mtk_foreach_port_link(port) {
++ pcie_m32(0, port->interrupt, PCIENA);
++ pcie_w32(0x7FFF0001, port->base + BAR0SETUP);
++ pcie_w32(MEMORY_BASE, port->base + IMBASEBAR0);
++ pcie_w32(0x06040001, port->base + PCIE_CLASS);
++ printk("PCIE%d Setup OK\n", port->id);
++ }
++ val = 0;
++
++ pcie_config_read(NULL, pcie_card_link - 1, 0, 0x4, &val);
++ pcie_config_write(NULL, pcie_card_link - 1, 0, 0x4, val|0x4);
++ pcie_config_read(NULL, pcie_card_link - 1, 0, 0x70c, &val);
++ val &= ~(0xff3) << 8;
++ val |= 0x50 << 8;
++ pcie_config_write(NULL, pcie_card_link - 1, 0, 0x70c, val);
++ pcie_config_read(NULL, pcie_card_link - 1, 0, 0x70c, &val);
++}
++
++static struct hw_pci mtk_pci __initdata = {
++ .nr_controllers = 1,
++ .map_irq = mtk_pcie_map_irq,
++ .setup = mtk_pcie_setup,
++ .scan = mtk_pcie_scan_bus,
++ .preinit = mtk_pcie_preinit,
++};
++
++extern void mt7623_ethifsys_init(void);
++static int mtk_pcie_probe(struct platform_device *pdev)
++{
++ struct resource *pcie_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++
++ pcie_base = devm_ioremap_resource(&pdev->dev, pcie_res);
++ if (!pcie_base)
++ return -ENOMEM;
++
++ mt7623_ethifsys_init();
++ pci_common_init_dev(&pdev->dev, &mtk_pci);
++
++ return 0;
++}
++
++static const struct of_device_id mtk_pcie_ids[] = {
++ { .compatible = "mediatek,mt7623-pcie" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, mtk_pcie_ids);
++
++static struct platform_driver mtk_pcie_driver = {
++ .probe = mtk_pcie_probe,
++ .driver = {
++ .name = "mt7623-pcie",
++ .owner = THIS_MODULE,
++ .of_match_table = of_match_ptr(mtk_pcie_ids),
++ },
++};
++
++static int __init mtk_pcie_init(void)
++{
++ return platform_driver_register(&mtk_pcie_driver);
++}
++
++late_initcall(mtk_pcie_init);
+diff --git a/arch/arm/mach-mediatek/pcie.h b/arch/arm/mach-mediatek/pcie.h
+new file mode 100644
+index 0000000..400a760e
+--- /dev/null
++++ b/arch/arm/mach-mediatek/pcie.h
+@@ -0,0 +1,14 @@
++#define SYSCTL_BASE 0xFA000000
++#define MEM_WIN 0x1A150000
++#define IO_WIN 0x1A160000
++#define MEM_DIRECT1 0x60000000
++#define MEMORY_BASE 0x80000000
++
++#define REGADDR(x, y) (x##_BASE + y)
++#define REGDATA(x) *((volatile unsigned int *)(x))
++
++#define SYSCFG1 REGADDR(SYSCTL, 0x14)
++#define RSTCTL REGADDR(SYSCTL, 0x34)
++
++
++
+--
+1.7.10.4
+
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