+++ /dev/null
-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
-@@ -42,6 +42,7 @@ 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_RT288X) += 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_request_and_ioremap(&pdev->dev, bridge_res);
-+ if (!bridge_base)
-+ return -ENOMEM;
-+
-+ pcie_base = devm_request_and_ioremap(&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
-@@ -39,6 +39,7 @@ choice
- bool "MT7620/8"
- select USB_ARCH_HAS_OHCI
- select USB_ARCH_HAS_EHCI
-+ 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
-
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