ralink: add 3.18 support

keep default as 3.14, mt7621 gic need to be ported to 3.18

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 44349

1 files changed, 442 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-3.18/0032-PCI-MIPS-adds-mt7620a-pcie-driver.patch b/target/linux/ramips/patches-3.18/0032-PCI-MIPS-adds-mt7620a-pcie-driver.patch
new file mode 100644
index 0000000000..03f8a92c8d
--- /dev/null
+++ b/target/linux/ramips/patches-3.18/0032-PCI-MIPS-adds-mt7620a-pcie-driver.patch
@@ -0,0 +1,442 @@
+From 307b7a71a634ae3848fb7c5c05759d647e140e12 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sat, 18 May 2013 22:06:15 +0200
+Subject: [PATCH 32/57] PCI: MIPS: adds mt7620a pcie driver
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/pci/Makefile      |    1 +
+ arch/mips/pci/pci-mt7620.c  |  363 +++++++++++++++++++++++++++++++++++++++++++
+ arch/mips/ralink/Kconfig    |    1 +
+ 3 files changed, 365 insertions(+)
+ create mode 100644 arch/mips/pci/pci-mt7620.c
+
+--- a/arch/mips/pci/Makefile
++++ b/arch/mips/pci/Makefile
+@@ -43,6 +43,7 @@ obj-$(CONFIG_SNI_RM)		+= fixup-sni.o ops
+ obj-$(CONFIG_LANTIQ)		+= fixup-lantiq.o
+ obj-$(CONFIG_PCI_LANTIQ)	+= pci-lantiq.o ops-lantiq.o
+ obj-$(CONFIG_SOC_MT7621)	+= pci-mt7621.o
++obj-$(CONFIG_SOC_MT7620)	+= pci-mt7620.o
+ obj-$(CONFIG_SOC_RT2880)	+= pci-rt2880.o
+ obj-$(CONFIG_SOC_RT3883)	+= pci-rt3883.o
+ obj-$(CONFIG_TANBAC_TB0219)	+= fixup-tb0219.o
+--- /dev/null
++++ b/arch/mips/pci/pci-mt7620.c
+@@ -0,0 +1,396 @@
++/*
++ *  Ralink MT7620A SoC PCI support
++ *
++ *  Copyright (C) 2007-2013 Bruce Chang
++ *  Copyright (C) 2013 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/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/reset.h>
++#include <linux/platform_device.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++#include <asm/mach-ralink/mt7620.h>
++
++#define RALINK_PCI_MM_MAP_BASE		0x20000000
++#define RALINK_PCI_IO_MAP_BASE		0x10160000
++
++#define RALINK_INT_PCIE0		4
++#define RALINK_SYSCFG1			0x14
++#define RALINK_CLKCFG1			0x30
++#define RALINK_GPIOMODE			0x60
++#define RALINK_PCIE_CLK_GEN		0x7c
++#define RALINK_PCIE_CLK_GEN1		0x80
++#define PCIEPHY0_CFG			0x90
++#define PPLL_CFG1			0x9c
++#define PPLL_DRV			0xa0
++#define PDRV_SW_SET			(1<<31)
++#define LC_CKDRVPD_			(1<<19)
++
++#define RALINK_PCI_CONFIG_ADDR		0x20
++#define RALINK_PCI_CONFIG_DATA_VIRT_REG	0x24
++#define MEMORY_BASE			0x0
++#define RALINK_PCIE0_RST		(1<<26)
++#define RALINK_PCI_BASE			0xB0140000
++#define RALINK_PCI_MEMBASE		0x28
++#define RALINK_PCI_IOBASE		0x2C
++
++#define RT6855_PCIE0_OFFSET		0x2000
++
++#define RALINK_PCI_PCICFG_ADDR		0x00
++#define RALINK_PCI0_BAR0SETUP_ADDR	0x10
++#define RALINK_PCI0_IMBASEBAR0_ADDR	0x18
++#define RALINK_PCI0_ID			0x30
++#define RALINK_PCI0_CLASS		0x34
++#define RALINK_PCI0_SUBID		0x38
++#define RALINK_PCI0_STATUS		0x50
++#define RALINK_PCI_PCIMSK_ADDR		0x0C
++
++#define RALINK_PCIEPHY_P0_CTL_OFFSET	0x7498
++#define RALINK_PCIE0_CLK_EN		(1 << 26)
++
++#define BUSY				0x80000000
++#define WAITRETRY_MAX			10
++#define WRITE_MODE			(1UL << 23)
++#define DATA_SHIFT			0
++#define ADDR_SHIFT			8
++
++static void __iomem *bridge_base;
++static void __iomem *pcie_base;
++
++static struct reset_control *rstpcie0;
++
++static inline void bridge_w32(u32 val, unsigned reg)
++{
++	iowrite32(val, bridge_base + reg);
++}
++
++static inline u32 bridge_r32(unsigned reg)
++{
++	return ioread32(bridge_base + reg);
++}
++
++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 clr, u32 set, unsigned reg)
++{
++	u32 val = pcie_r32(reg);
++
++	val &= ~clr;
++	val |= set;
++	pcie_w32(val, reg);
++}
++
++static int wait_pciephy_busy(void)
++{
++	unsigned long reg_value = 0x0, retry = 0;
++
++	while (1) {
++		reg_value = pcie_r32(PCIEPHY0_CFG);
++
++		if (reg_value & BUSY)
++			mdelay(100);
++		else
++			break;
++		if (retry++ > WAITRETRY_MAX){
++			printk("PCIE-PHY retry failed.\n");
++			return -1;
++		}
++	}
++	return 0;
++}
++
++static void pcie_phy(unsigned long addr, unsigned long val)
++{
++	wait_pciephy_busy();
++	pcie_w32(WRITE_MODE | (val << DATA_SHIFT) | (addr << ADDR_SHIFT), PCIEPHY0_CFG);
++	mdelay(1);
++	wait_pciephy_busy();
++}
++
++static int pci_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) | 0x80000000;
++	bridge_w32(address, RALINK_PCI_CONFIG_ADDR);
++	data = bridge_r32(RALINK_PCI_CONFIG_DATA_VIRT_REG);
++
++	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 pci_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) | 0x80000000;
++	bridge_w32(address, RALINK_PCI_CONFIG_ADDR);
++	data = bridge_r32(RALINK_PCI_CONFIG_DATA_VIRT_REG);
++
++	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;
++	}
++
++	bridge_w32(data, RALINK_PCI_CONFIG_DATA_VIRT_REG);
++
++	return PCIBIOS_SUCCESSFUL;
++}
++
++struct pci_ops mt7620_pci_ops= {
++	.read	= pci_config_read,
++	.write	= pci_config_write,
++};
++
++static struct resource mt7620_res_pci_mem1;
++static struct resource mt7620_res_pci_io1;
++struct pci_controller mt7620_controller = {
++	.pci_ops	= &mt7620_pci_ops,
++	.mem_resource	= &mt7620_res_pci_mem1,
++	.mem_offset	= 0x00000000UL,
++	.io_resource	= &mt7620_res_pci_io1,
++	.io_offset	= 0x00000000UL,
++	.io_map_base	= 0xa0000000,
++};
++
++static int mt7620_pci_hw_init(struct platform_device *pdev) {
++	/* PCIE: bypass PCIe DLL */
++	pcie_phy(0x0, 0x80);
++	pcie_phy(0x1, 0x04);
++
++	/* PCIE: Elastic buffer control */
++	pcie_phy(0x68, 0xB4);
++
++	pcie_m32(0, BIT(1), RALINK_PCI_PCICFG_ADDR);
++
++	reset_control_assert(rstpcie0);
++
++	rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
++	rt_sysc_m32(BIT(19), BIT(31), PPLL_DRV);
++
++	reset_control_deassert(rstpcie0);
++	rt_sysc_m32(0, RALINK_PCIE0_CLK_EN, RALINK_CLKCFG1);
++
++	mdelay(100);
++
++	if (!(rt_sysc_r32(PPLL_CFG1) & BIT(23))) {
++		dev_err(&pdev->dev, "MT7620 PPLL unlock\n");
++		reset_control_assert(rstpcie0);
++		rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
++		return -1;
++	}
++	rt_sysc_m32(BIT(18) | BIT(17), BIT(19) | BIT(31), PPLL_DRV);
++
++	return 0;
++}
++
++static int mt7628_pci_hw_init(struct platform_device *pdev) {
++	u32 val = 0;
++
++	rt_sysc_m32(BIT(16), 0, RALINK_GPIOMODE);
++	reset_control_deassert(rstpcie0);
++	rt_sysc_m32(0, RALINK_PCIE0_CLK_EN, RALINK_CLKCFG1);
++	mdelay(100);
++
++	pcie_m32(~0xff, 0x5, RALINK_PCIEPHY_P0_CTL_OFFSET);
++
++	pci_config_read(NULL, 0, 0x70c, 4, &val);
++	val &= ~(0xff) << 8;
++	val |= 0x50 << 8;
++	pci_config_write(NULL, 0, 0x70c, 4, val);
++
++	pci_config_read(NULL, 0, 0x70c, 4, &val);
++	dev_err(&pdev->dev, "Port 0 N_FTS = %x\n", (unsigned int) val);
++
++	return 0;
++}
++
++static int mt7620_pci_probe(struct platform_device *pdev)
++{
++	struct resource *bridge_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	struct resource *pcie_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++	u32 val = 0;
++
++	rstpcie0 = devm_reset_control_get(&pdev->dev, "pcie0");
++	if (IS_ERR(rstpcie0))
++		return PTR_ERR(rstpcie0);
++
++	bridge_base = devm_ioremap_resource(&pdev->dev, bridge_res);
++        if (!bridge_base)
++		return -ENOMEM;
++
++	pcie_base = devm_ioremap_resource(&pdev->dev, pcie_res);
++        if (!pcie_base)
++		return -ENOMEM;
++
++	iomem_resource.start = 0;
++	iomem_resource.end = ~0;
++	ioport_resource.start = 0;
++	ioport_resource.end = ~0;
++
++	/* bring up the pci core */
++	switch (ralink_soc) {
++	case MT762X_SOC_MT7620A:
++		if (mt7620_pci_hw_init(pdev))
++			return -1;
++		break;
++
++	case MT762X_SOC_MT7628AN:
++		if (mt7628_pci_hw_init(pdev))
++			return -1;
++		break;
++
++	default:
++		dev_err(&pdev->dev, "pcie is not supported on this hardware\n");
++		return -1;
++	}
++	mdelay(50);
++
++	/* enable write access */
++	pcie_m32(BIT(1), 0, RALINK_PCI_PCICFG_ADDR);
++	mdelay(100);
++
++	/* check if there is a card present */
++	if ((pcie_r32(RALINK_PCI0_STATUS) & 0x1) == 0) {
++		reset_control_assert(rstpcie0);
++		rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
++		if (ralink_soc == MT762X_SOC_MT7620A)
++			rt_sysc_m32(LC_CKDRVPD_, PDRV_SW_SET, PPLL_DRV);
++		dev_err(&pdev->dev, "PCIE0 no card, disable it(RST&CLK)\n");
++		return -1;
++	}
++
++	/* setup ranges */
++	bridge_w32(0xffffffff, RALINK_PCI_MEMBASE);
++	bridge_w32(RALINK_PCI_IO_MAP_BASE, RALINK_PCI_IOBASE);
++
++	pcie_w32(0x7FFF0001, RALINK_PCI0_BAR0SETUP_ADDR);
++	pcie_w32(MEMORY_BASE, RALINK_PCI0_IMBASEBAR0_ADDR);
++	pcie_w32(0x06040001, RALINK_PCI0_CLASS);
++
++	/* enable interrupts */
++	pcie_m32(0, BIT(20), RALINK_PCI_PCIMSK_ADDR);
++
++	/* voodoo from the SDK driver */
++	pci_config_read(NULL, 0, 4, 4, &val);
++	pci_config_write(NULL, 0, 4, 4, val | 0x7);
++
++	pci_load_of_ranges(&mt7620_controller, pdev->dev.of_node);
++	register_pci_controller(&mt7620_controller);
++
++	return 0;
++}
++
++int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
++{
++	u16 cmd;
++	u32 val;
++	int irq = 0;
++
++	if ((dev->bus->number == 0) && (slot == 0)) {
++		pcie_w32(0x7FFF0001, RALINK_PCI0_BAR0SETUP_ADDR); //open 7FFF:2G; ENABLE
++		pci_config_write(dev->bus, 0, PCI_BASE_ADDRESS_0, 4, MEMORY_BASE);
++		pci_config_read(dev->bus, 0, PCI_BASE_ADDRESS_0, 4, &val);
++	} else if ((dev->bus->number == 1) && (slot == 0x0)) {
++		irq = RALINK_INT_PCIE0;
++	} else {
++		dev_err(&dev->dev, "no irq found - bus=0x%x, slot = 0x%x\n", dev->bus->number, slot);
++		return 0;
++	}
++	dev_err(&dev->dev, "card - bus=0x%x, slot = 0x%x irq=%d\n", dev->bus->number, slot, irq);
++
++	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x14);  //configure cache line size 0x14
++	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xFF);  //configure latency timer 0x10
++	pci_read_config_word(dev, PCI_COMMAND, &cmd);
++
++	// FIXME
++	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);
++	//pci_write_config_byte(dev, PCI_INTERRUPT_PIN, dev->irq);
++
++	return irq;
++}
++
++int pcibios_plat_dev_init(struct pci_dev *dev)
++{
++	return 0;
++}
++
++static const struct of_device_id mt7620_pci_ids[] = {
++	{ .compatible = "mediatek,mt7620-pci" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, mt7620_pci_ids);
++
++static struct platform_driver mt7620_pci_driver = {
++	.probe = mt7620_pci_probe,
++	.driver = {
++		.name = "mt7620-pci",
++		.owner = THIS_MODULE,
++		.of_match_table = of_match_ptr(mt7620_pci_ids),
++	},
++};
++
++static int __init mt7620_pci_init(void)
++{
++	return platform_driver_register(&mt7620_pci_driver);
++}
++
++arch_initcall(mt7620_pci_init);
+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -33,6 +33,7 @@ choice
+ 
+ 	config SOC_MT7620
+ 		bool "MT7620/8"
++		select HW_HAS_PCI
+ 
+ 	config SOC_MT7621
+ 		bool "MT7621"
+--- a/arch/mips/include/asm/mach-ralink/mt7620.h
++++ b/arch/mips/include/asm/mach-ralink/mt7620.h
+@@ -19,6 +19,7 @@ enum mt762x_soc_type {
+ 	MT762X_SOC_MT7620N,
+ 	MT762X_SOC_MT7628AN,
+ };
++extern enum mt762x_soc_type mt762x_soc;
+ 
+ #define MT7620_SYSC_BASE		0x10000000
+