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ralink: make pci driver handle mt7628

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

SVN-Revision: 43198
This commit is contained in:
John Crispin 2014-11-06 09:31:37 +00:00
parent cadf517107
commit c5954fc510
3 changed files with 142 additions and 97 deletions
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2
target/linux/ramips/dts/mt7620a.dtsi
View File

@ -430,7 +430,7 @@
};
pcie@10140000 {
compatible = "ralink,mt7620a-pci";
compatible = "ralink,mt7620-pci";
reg = <0x10140000 0x100
0x10142000 0x100>;

3
target/linux/ramips/dts/mt7628an.dtsi
View File

@ -202,9 +202,6 @@
reg = <0x10140000 0x100
0x10142000 0x100>;
ranges = <0x2000000 0 0x8000000 0x2000000 0 0x1000000 /* pci memory */
0x1000000 0 0x00000000 0x10160000 0 0x10000>; /* io space */
resets = <&rstctrl 26>;
reset-names = "pcie0";

234
target/linux/ramips/patches-3.14/0032-PCI-MIPS-adds-mt7620a-pcie-driver.patch
View File

@ -23,7 +23,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
--- /dev/null
+++ b/arch/mips/pci/pci-mt7620a.c
@@ -0,0 +1,363 @@
@@ -0,0 +1,401 @@
+/*
+ * Ralink MT7620A SoC PCI support
+ *
@ -49,12 +49,12 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+#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_SYSTEM_CONTROL_BASE 0xb0000000
+#define RALINK_SYSCFG1 0x14
+#define RALINK_CLKCFG1 0x30
+#define RALINK_GPIOMODE 0x60
@ -63,19 +63,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+#define PCIEPHY0_CFG 0x90
+#define PPLL_CFG1 0x9c
+#define PPLL_DRV 0xa0
+#define RALINK_PCI_HOST_MODE_EN (1<<7)
+#define RALINK_PCIE_RC_MODE_EN (1<<8)
+#define RALINK_PCIE_RST (1<<23)
+#define RALINK_PCI_RST (1<<24)
+#define RALINK_PCI_CLK_EN (1<<19)
+#define RALINK_PCIE_CLK_EN (1<<21)
+#define PCI_SLOTx2 (1<<11)
+#define PCI_SLOTx1 (2<<11)
+#define PDRV_SW_SET (1<<31)
+#define LC_CKDRVPD_ (1<<19)
+
+#define RALINK_PCI_CONFIG_ADDR 0x20
+#define RALINK_PCI_CONFIG_DATA_VIRTUAL_REG 0x24
+#define RALINK_PCI_CONFIG_DATA_VIRT_REG 0x24
+#define MEMORY_BASE 0x0
+#define RALINK_PCIE0_RST (1<<26)
+#define RALINK_PCI_BASE 0xB0140000
@ -93,6 +85,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+#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
@ -101,7 +94,6 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+#define DATA_SHIFT 0
+#define ADDR_SHIFT 8
+
+
+static void __iomem *bridge_base;
+static void __iomem *pcie_base;
+
@ -130,17 +122,17 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+static inline void pcie_m32(u32 clr, u32 set, unsigned reg)
+{
+ u32 val = pcie_r32(reg);
+
+ val &= ~clr;
+ val |= set;
+ pcie_w32(val, reg);
+}
+
+int wait_pciephy_busy(void)
+static int wait_pciephy_busy(void)
+{
+ unsigned long reg_value = 0x0, retry = 0;
+
+ while (1) {
+ //reg_value = rareg(READMODE, PCIEPHY0_CFG, 0);
+ reg_value = pcie_r32(PCIEPHY0_CFG);
+
+ if (reg_value & BUSY)
@ -169,10 +161,14 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ u8 func = PCI_FUNC(devfn);
+ u32 address;
+ u32 data;
+ u32 num = 0;
+
+ address = (((where & 0xF00) >> 8) << 24) | (bus->number << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | 0x80000000;
+ 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_VIRTUAL_REG);
+ data = bridge_r32(RALINK_PCI_CONFIG_DATA_VIRT_REG);
+
+ switch (size) {
+ case 1:
@ -195,10 +191,14 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ u8 func = PCI_FUNC(devfn);
+ u32 address;
+ u32 data;
+ u32 num = 0;
+
+ address = (((where & 0xF00) >> 8) << 24) | (bus->number << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | 0x80000000;
+ 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_VIRTUAL_REG);
+ data = bridge_r32(RALINK_PCI_CONFIG_DATA_VIRT_REG);
+
+ switch (size) {
+ case 1:
@ -214,42 +214,90 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ break;
+ }
+
+ bridge_w32(data, RALINK_PCI_CONFIG_DATA_VIRTUAL_REG);
+ bridge_w32(data, RALINK_PCI_CONFIG_DATA_VIRT_REG);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops mt7620a_pci_ops= {
+struct pci_ops mt7620_pci_ops= {
+ .read = pci_config_read,
+ .write = pci_config_write,
+};
+
+static struct resource mt7620a_res_pci_mem1 = {
+ .name = "pci memory",
+ .start = RALINK_PCI_MM_MAP_BASE,
+ .end = (u32) ((RALINK_PCI_MM_MAP_BASE + (unsigned char *)0x0fffffff)),
+ .flags = IORESOURCE_MEM,
+};
+static struct resource mt7620a_res_pci_io1 = {
+ .name = "pci io",
+ .start = RALINK_PCI_IO_MAP_BASE,
+ .end = (u32) ((RALINK_PCI_IO_MAP_BASE + (unsigned char *)0x0ffff)),
+ .flags = IORESOURCE_IO,
+};
+
+struct pci_controller mt7620a_controller = {
+ .pci_ops = &mt7620a_pci_ops,
+ .mem_resource = &mt7620a_res_pci_mem1,
+ .io_resource = &mt7620a_res_pci_io1,
+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 mt7620a_pci_probe(struct platform_device *pdev)
+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);
+
+ reset_control_assert(rstpcie0);
+
+ rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
+ rt_sysc_m32(BIT(19), BIT(31), PPLL_DRV);
+ rt_sysc_m32(0x3 << 16, 0, RALINK_GPIOMODE);
+
+ 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);
+
+ mdelay(100);
+ reset_control_assert(rstpcie0);
+ rt_sysc_m32(0x30, 2 << 4, RALINK_SYSCFG1);
+
+ rt_sysc_m32(~0x7fffffff, 0x80000000, RALINK_PCIE_CLK_GEN);
+ rt_sysc_m32(~0x80ffffff, 0xa << 24, RALINK_PCIE_CLK_GEN1);
+
+ 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))
@ -264,74 +312,68 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ return -ENOMEM;
+
+ iomem_resource.start = 0;
+ iomem_resource.end= ~0;
+ ioport_resource.start= 0;
+ iomem_resource.end = ~0;
+ ioport_resource.start = 0;
+ ioport_resource.end = ~0;
+
+ /* PCIE: bypass PCIe DLL */
+ pcie_phy(0x0, 0x80);
+ pcie_phy(0x1, 0x04);
+ /* PCIE: Elastic buffer control */
+ pcie_phy(0x68, 0xB4);
+ /* bring up the pci core */
+ switch (mt762x_soc) {
+ case MT762X_SOC_MT7620A:
+ if (mt7620_pci_hw_init(pdev))
+ return -1;
+ break;
+
+ reset_control_assert(rstpcie0);
+ rt_sysc_m32(RALINK_PCIE0_CLK_EN, 0, RALINK_CLKCFG1);
+ rt_sysc_m32(1<<19, 1<<31, PPLL_DRV);
+ rt_sysc_m32(0x3 << 16, 0, RALINK_GPIOMODE);
+ case MT762X_SOC_MT7628AN:
+ if (mt7628_pci_hw_init(pdev))
+ return -1;
+ break;
+
+ reset_control_deassert(rstpcie0);
+ rt_sysc_m32(0, RALINK_PCIE0_CLK_EN, RALINK_CLKCFG1);
+
+ mdelay(100);
+
+ if (!(rt_sysc_r32(PPLL_CFG1) & 1<<23)) {
+ printk("MT7620 PPLL unlock\n");
+ reset_control_assert(rstpcie0);
+ rt_sysc_m32(BIT(26), 0, RALINK_CLKCFG1);
+ return 0;
+ default:
+ dev_err(&pdev->dev, "pcie is not supported on this hardware\n");
+ return -1;
+ }
+ rt_sysc_m32((0x1<<18) | (0x1<<17), (0x1 << 19) | (0x1 << 31), PPLL_DRV);
+
+ mdelay(100);
+ reset_control_assert(rstpcie0);
+ rt_sysc_m32(0x30, 2 << 4, RALINK_SYSCFG1);
+
+ rt_sysc_m32(~0x7fffffff, 0x80000000, RALINK_PCIE_CLK_GEN);
+ rt_sysc_m32(~0x80ffffff, 0xa << 24, RALINK_PCIE_CLK_GEN1);
+
+ mdelay(50);
+ reset_control_deassert(rstpcie0);
+
+ /* enable write access */
+ pcie_m32(BIT(1), 0, RALINK_PCI_PCICFG_ADDR);
+ mdelay(100);
+
+ if (( pcie_r32(RALINK_PCI0_STATUS) & 0x1) == 0) {
+ /* 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);
+ rt_sysc_m32(LC_CKDRVPD_, PDRV_SW_SET, PPLL_DRV);
+ printk("PCIE0 no card, disable it(RST&CLK)\n");
+ if (mt762x_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(0x7FFF0000, RALINK_PCI0_BAR0SETUP_ADDR);
+ pcie_w32(0x7FFF0001, RALINK_PCI0_BAR0SETUP_ADDR);
+ pcie_w32(MEMORY_BASE, RALINK_PCI0_IMBASEBAR0_ADDR);
+ pcie_w32(0x08021814, RALINK_PCI0_ID);
+ pcie_w32(0x06040001, RALINK_PCI0_CLASS);
+ pcie_w32(0x28801814, RALINK_PCI0_SUBID);
+
+ /* enable interrupts */
+ pcie_m32(0, BIT(20), RALINK_PCI_PCIMSK_ADDR);
+
+ register_pci_controller(&mt7620a_controller);
+ /* 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)
+{
+ const struct resource *res;
+ u16 cmd;
+ u32 val;
+ int i, irq = 0;
+ int irq = 0;
+
+ if ((dev->bus->number == 0) && (slot == 0)) {
+ pcie_w32(0x7FFF0001, RALINK_PCI0_BAR0SETUP_ADDR); //open 7FFF:2G; ENABLE
@ -340,14 +382,10 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ } else if ((dev->bus->number == 1) && (slot == 0x0)) {
+ irq = RALINK_INT_PCIE0;
+ } else {
+ printk("bus=0x%x, slot = 0x%x\n", dev->bus->number, slot);
+ dev_err(&dev->dev, "no irq found - bus=0x%x, slot = 0x%x\n", dev->bus->number, slot);
+ return 0;
+ }
+
+ for (i = 0; i < 6; i++) {
+ res = &dev->resource[i];
+ }
+
+ 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);
@ -366,27 +404,27 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ return 0;
+}
+
+static const struct of_device_id mt7620a_pci_ids[] = {
+ { .compatible = "ralink,mt7620a-pci" },
+static const struct of_device_id mt7620_pci_ids[] = {
+ { .compatible = "mediatek,mt7620-pci" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mt7620a_pci_ids);
+MODULE_DEVICE_TABLE(of, mt7620_pci_ids);
+
+static struct platform_driver mt7620a_pci_driver = {
+ .probe = mt7620a_pci_probe,
+static struct platform_driver mt7620_pci_driver = {
+ .probe = mt7620_pci_probe,
+ .driver = {
+ .name = "mt7620a-pci",
+ .name = "mt7620-pci",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mt7620a_pci_ids),
+ .of_match_table = of_match_ptr(mt7620_pci_ids),
+ },
+};
+
+static int __init mt7620a_pci_init(void)
+static int __init mt7620_pci_init(void)
+{
+ return platform_driver_register(&mt7620a_pci_driver);
+ return platform_driver_register(&mt7620_pci_driver);
+}
+
+arch_initcall(mt7620a_pci_init);
+arch_initcall(mt7620_pci_init);
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -39,6 +39,7 @@ choice
@ -397,3 +435,13 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
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