MIPS: Netlogic: XLP9XX USB support

XLP9XX has a USB 3.0 controller on-chip with 2 xHCI ports. The USB
block is similar to the one on XLP2XX, so update usb-init-xlp2.c
to handle XLP9XX as well.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6285/

2 files changed, 79 insertions, 13 deletions

diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c
index e7ff2d37a464..997cd9ee10de 100644
--- a/arch/mips/netlogic/xlp/nlm_hal.c
+++ b/arch/mips/netlogic/xlp/nlm_hal.c
@@ -72,6 +72,10 @@ int nlm_irq_to_irt(int irq)
         /* bypass for 9xx */
         if (cpu_is_xlp9xx()) {
                 switch (irq) {
+                case PIC_9XX_XHCI_0_IRQ:
+                        return 114;
+                case PIC_9XX_XHCI_1_IRQ:
+                        return 115;
                 case PIC_UART_0_IRQ:
                         return 133;
                 case PIC_UART_1_IRQ:
diff --git a/arch/mips/netlogic/xlp/usb-init-xlp2.c b/arch/mips/netlogic/xlp/usb-init-xlp2.c
index 36e9c22afc46..17ade1ce5dfd 100644
--- a/arch/mips/netlogic/xlp/usb-init-xlp2.c
+++ b/arch/mips/netlogic/xlp/usb-init-xlp2.c
@@ -37,6 +37,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/pci_ids.h>
 #include <linux/platform_device.h>
 #include <linux/irq.h>
 
@@ -83,12 +84,14 @@
 #define nlm_read_usb_reg(b, r)          nlm_read_reg(b, r)
 #define nlm_write_usb_reg(b, r, v)      nlm_write_reg(b, r, v)
 
-#define nlm_xlpii_get_usb_pcibase(node, inst)           \
-        nlm_pcicfg_base(XLP2XX_IO_USB_OFFSET(node, inst))
+#define nlm_xlpii_get_usb_pcibase(node, inst)                   \
+                        nlm_pcicfg_base(cpu_is_xlp9xx() ?       \
+                        XLP9XX_IO_USB_OFFSET(node, inst) :      \
+                        XLP2XX_IO_USB_OFFSET(node, inst))
 #define nlm_xlpii_get_usb_regbase(node, inst)           \
         (nlm_xlpii_get_usb_pcibase(node, inst) + XLP_IO_PCI_HDRSZ)
 
-static void xlpii_usb_ack(struct irq_data *data)
+static void xlp2xx_usb_ack(struct irq_data *data)
 {
         u64 port_addr;
 
@@ -109,6 +112,29 @@ static void xlpii_usb_ack(struct irq_data *data)
         nlm_write_usb_reg(port_addr, XLPII_USB3_INT_REG, 0xffffffff);
 }
 
+static void xlp9xx_usb_ack(struct irq_data *data)
+{
+        u64 port_addr;
+        int node, irq;
+
+        /* Find the node and irq on the node */
+        irq = data->irq % NLM_IRQS_PER_NODE;
+        node = data->irq / NLM_IRQS_PER_NODE;
+
+        switch (irq) {
+        case PIC_9XX_XHCI_0_IRQ:
+                port_addr = nlm_xlpii_get_usb_regbase(node, 1);
+                break;
+        case PIC_9XX_XHCI_1_IRQ:
+                port_addr = nlm_xlpii_get_usb_regbase(node, 2);
+                break;
+        default:
+                pr_err("No matching USB irq %d node  %d!\n", irq, node);
+                return;
+        }
+        nlm_write_usb_reg(port_addr, XLPII_USB3_INT_REG, 0xffffffff);
+}
+
 static void nlm_xlpii_usb_hw_reset(int node, int port)
 {
         u64 port_addr, xhci_base, pci_base;
@@ -178,17 +204,33 @@ static void nlm_xlpii_usb_hw_reset(int node, int port)
 
 static int __init nlm_platform_xlpii_usb_init(void)
 {
+        int node;
+
         if (!cpu_is_xlpii())
                 return 0;
 
-        pr_info("Initializing 2XX USB Interface\n");
-        nlm_xlpii_usb_hw_reset(0, 1);
-        nlm_xlpii_usb_hw_reset(0, 2);
-        nlm_xlpii_usb_hw_reset(0, 3);
-        nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_0_IRQ, xlpii_usb_ack);
-        nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_1_IRQ, xlpii_usb_ack);
-        nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_2_IRQ, xlpii_usb_ack);
+        if (!cpu_is_xlp9xx()) {
+                /* XLP 2XX single node */
+                pr_info("Initializing 2XX USB Interface\n");
+                nlm_xlpii_usb_hw_reset(0, 1);
+                nlm_xlpii_usb_hw_reset(0, 2);
+                nlm_xlpii_usb_hw_reset(0, 3);
+                nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_0_IRQ, xlp2xx_usb_ack);
+                nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_1_IRQ, xlp2xx_usb_ack);
+                nlm_set_pic_extra_ack(0, PIC_2XX_XHCI_2_IRQ, xlp2xx_usb_ack);
+                return 0;
+        }
 
+        /* XLP 9XX, multi-node */
+        pr_info("Initializing 9XX USB Interface\n");
+        for (node = 0; node < NLM_NR_NODES; node++) {
+                if (!nlm_node_present(node))
+                        continue;
+                nlm_xlpii_usb_hw_reset(node, 1);
+                nlm_xlpii_usb_hw_reset(node, 2);
+                nlm_set_pic_extra_ack(node, PIC_9XX_XHCI_0_IRQ, xlp9xx_usb_ack);
+                nlm_set_pic_extra_ack(node, PIC_9XX_XHCI_1_IRQ, xlp9xx_usb_ack);
+        }
         return 0;
 }
 
@@ -196,8 +238,26 @@ arch_initcall(nlm_platform_xlpii_usb_init);
 
 static u64 xlp_usb_dmamask = ~(u32)0;
 
-/* Fixup IRQ for USB devices on XLP the SoC PCIe bus */
-static void nlm_usb_fixup_final(struct pci_dev *dev)
+/* Fixup the IRQ for USB devices which is exist on XLP9XX SOC PCIE bus */
+static void nlm_xlp9xx_usb_fixup_final(struct pci_dev *dev)
+{
+        int node;
+
+        node = xlp_socdev_to_node(dev);
+        dev->dev.dma_mask               = &xlp_usb_dmamask;
+        dev->dev.coherent_dma_mask      = DMA_BIT_MASK(32);
+        switch (dev->devfn) {
+        case 0x21:
+                dev->irq = nlm_irq_to_xirq(node, PIC_9XX_XHCI_0_IRQ);
+                break;
+        case 0x22:
+                dev->irq = nlm_irq_to_xirq(node, PIC_9XX_XHCI_1_IRQ);
+                break;
+        }
+}
+
+/* Fixup the IRQ for USB devices which is exist on XLP2XX SOC PCIE bus */
+static void nlm_xlp2xx_usb_fixup_final(struct pci_dev *dev)
 {
         dev->dev.dma_mask               = &xlp_usb_dmamask;
         dev->dev.coherent_dma_mask      = DMA_BIT_MASK(32);
@@ -214,5 +274,7 @@ static void nlm_usb_fixup_final(struct pci_dev *dev)
         }
 }
 
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_XLP9XX_XHCI,
+                nlm_xlp9xx_usb_fixup_final);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_XHCI,
-                nlm_usb_fixup_final);
+                nlm_xlp2xx_usb_fixup_final);