MIPS: Netlogic: Platform changes for XLS USB

Add USB initialization code, setup resources and add USB platform
driver in mips/netlogic/xlr/platform.c.
Add USB support for XLR/XLS platform in Kconfig.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3759/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/arch/mips/netlogic/xlr/platform.c b/arch/mips/netlogic/xlr/platform.c
index eab64b45dffd..cb0ab63089db 100644
--- a/arch/mips/netlogic/xlr/platform.c
+++ b/arch/mips/netlogic/xlr/platform.c
@@ -97,3 +97,92 @@ static int __init nlm_uart_init(void)
 }
 
 arch_initcall(nlm_uart_init);
+
+#ifdef CONFIG_USB
+/* Platform USB devices, only on XLS chips */
+static u64 xls_usb_dmamask = ~(u32)0;
+#define USB_PLATFORM_DEV(n, i, irq)                                     \
+        {                                                               \
+                .name           = n,                                    \
+                .id             = i,                                    \
+                .num_resources  = 2,                                    \
+                .dev            = {                                     \
+                        .dma_mask       = &xls_usb_dmamask,             \
+                        .coherent_dma_mask = 0xffffffff,                \
+                },                                                      \
+                .resource       = (struct resource[]) {                 \
+                        {                                               \
+                                .flags = IORESOURCE_MEM,                \
+                        },                                              \
+                        {                                               \
+                                .start  = irq,                          \
+                                .end    = irq,                          \
+                                .flags = IORESOURCE_IRQ,                \
+                        },                                              \
+                },                                                      \
+        }
+
+static struct platform_device xls_usb_ehci_device =
+                         USB_PLATFORM_DEV("ehci-xls", 0, PIC_USB_IRQ);
+static struct platform_device xls_usb_ohci_device_0 =
+                         USB_PLATFORM_DEV("ohci-xls-0", 1, PIC_USB_IRQ);
+static struct platform_device xls_usb_ohci_device_1 =
+                         USB_PLATFORM_DEV("ohci-xls-1", 2, PIC_USB_IRQ);
+
+static struct platform_device *xls_platform_devices[] = {
+        &xls_usb_ehci_device,
+        &xls_usb_ohci_device_0,
+        &xls_usb_ohci_device_1,
+};
+
+int xls_platform_usb_init(void)
+{
+        uint64_t usb_mmio, gpio_mmio;
+        unsigned long memres;
+        uint32_t val;
+
+        if (!nlm_chip_is_xls())
+                return 0;
+
+        gpio_mmio = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
+        usb_mmio  = nlm_mmio_base(NETLOGIC_IO_USB_1_OFFSET);
+
+        /* Clear Rogue Phy INTs */
+        nlm_write_reg(usb_mmio, 49, 0x10000000);
+        /* Enable all interrupts */
+        nlm_write_reg(usb_mmio, 50, 0x1f000000);
+
+        /* Enable ports */
+        nlm_write_reg(usb_mmio,  1, 0x07000500);
+
+        val = nlm_read_reg(gpio_mmio, 21);
+        if (((val >> 22) & 0x01) == 0) {
+                pr_info("Detected USB Device mode - Not supported!\n");
+                nlm_write_reg(usb_mmio,  0, 0x01000000);
+                return 0;
+        }
+
+        pr_info("Detected USB Host mode - Adding XLS USB devices.\n");
+        /* Clear reset, host mode */
+        nlm_write_reg(usb_mmio,  0, 0x02000000);
+
+        /* Memory resource for various XLS usb ports */
+        usb_mmio = nlm_mmio_base(NETLOGIC_IO_USB_0_OFFSET);
+        memres = CPHYSADDR((unsigned long)usb_mmio);
+        xls_usb_ehci_device.resource[0].start = memres;
+        xls_usb_ehci_device.resource[0].end = memres + 0x400 - 1;
+
+        memres += 0x400;
+        xls_usb_ohci_device_0.resource[0].start = memres;
+        xls_usb_ohci_device_0.resource[0].end = memres + 0x400 - 1;
+
+        memres += 0x400;
+        xls_usb_ohci_device_1.resource[0].start = memres;
+        xls_usb_ohci_device_1.resource[0].end = memres + 0x400 - 1;
+
+        return platform_add_devices(xls_platform_devices,
+                                ARRAY_SIZE(xls_platform_devices));
+}
+
+arch_initcall(xls_platform_usb_init);
+#endif