ARM: cns3xxx: Add architecture definition for EHCI/OHCI controller

This patch add plateform_device for EHCI and OHCI controller on CNS3XXX.
Power reference count (usb_pwr_ref) is used to control enabling and
disabling the single clock control for both EHCI and OHCI controller.

It also removes EHCI/OHCI unused virtual address definitions.

Signed-off-by: Mac Lin <[e-mail]>
Signed-off-by: Anton Vorontsov <[e-mail]>

arch/arm/mach-cns3xxx/cns3420vb.c

···
 #include <linux/kernel.h>
 #include <linux/compiler.h>
 #include <linux/io.h>
+#include <linux/dma-mapping.h>
 #include <linux/serial_core.h>
 #include <linux/serial_8250.h>
 #include <linux/platform_device.h>
···
 }
 
 /*
+ * USB
+ */
+static struct resource cns3xxx_usb_ehci_resources[] = {
+	[0] = {
+		.start = CNS3XXX_USB_BASE,
+		.end   = CNS3XXX_USB_BASE + SZ_16M - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_CNS3XXX_USB_EHCI,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static u64 cns3xxx_usb_ehci_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device cns3xxx_usb_ehci_device = {
+	.name          = "cns3xxx-ehci",
+	.num_resources = ARRAY_SIZE(cns3xxx_usb_ehci_resources),
+	.resource      = cns3xxx_usb_ehci_resources,
+	.dev           = {
+		.dma_mask          = &cns3xxx_usb_ehci_dma_mask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+};
+
+static struct resource cns3xxx_usb_ohci_resources[] = {
+	[0] = {
+		.start = CNS3XXX_USB_OHCI_BASE,
+		.end   = CNS3XXX_USB_OHCI_BASE + SZ_16M - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_CNS3XXX_USB_OHCI,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static u64 cns3xxx_usb_ohci_dma_mask = DMA_BIT_MASK(32);
+
+static struct platform_device cns3xxx_usb_ohci_device = {
+	.name          = "cns3xxx-ohci",
+	.num_resources = ARRAY_SIZE(cns3xxx_usb_ohci_resources),
+	.resource      = cns3xxx_usb_ohci_resources,
+	.dev           = {
+		.dma_mask          = &cns3xxx_usb_ohci_dma_mask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+};
+
+/*
  * Initialization
  */
 static struct platform_device *cns3420_pdevs[] __initdata = {
 	&cns3420_nor_pdev,
+	&cns3xxx_usb_ehci_device,
+	&cns3xxx_usb_ohci_device,
 };
 
 static void __init cns3420_init(void)

arch/arm/mach-cns3xxx/include/mach/cns3xxx.h

···
 #define CNS3XXX_USBOTG_BASE_VIRT		0xFFF15000
 
 #define CNS3XXX_USB_BASE			0x82000000	/* USB Host Control */
-#define CNS3XXX_USB_BASE_VIRT			0xFFF16000
 
 #define CNS3XXX_SATA2_BASE			0x83000000	/* SATA */
 #define CNS3XXX_SATA2_SIZE			SZ_16M
···
 #define CNS3XXX_2DG_BASE_VIRT			0xFFF1B000
 
 #define CNS3XXX_USB_OHCI_BASE			0x88000000	/* USB OHCI */
-#define CNS3XXX_USB_OHCI_BASE_VIRT		0xFFF1C000
 
 #define CNS3XXX_L2C_BASE			0x92000000	/* L2 Cache Control */
 #define CNS3XXX_L2C_BASE_VIRT			0xFFF27000

arch/arm/mach-cns3xxx/include/mach/pm.h

···
 #ifndef __CNS3XXX_PM_H
 #define __CNS3XXX_PM_H
 
+#include <asm/atomic.h>
+
 void cns3xxx_pwr_clk_en(unsigned int block);
 void cns3xxx_pwr_clk_dis(unsigned int block);
 void cns3xxx_pwr_power_up(unsigned int block);
 void cns3xxx_pwr_power_down(unsigned int block);
+
+extern atomic_t usb_pwr_ref;
 
 #endif /* __CNS3XXX_PM_H */

arch/arm/mach-cns3xxx/pm.c

···
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/delay.h>
+#include <asm/atomic.h>
 #include <mach/system.h>
 #include <mach/cns3xxx.h>
 #include <mach/pm.h>
···
 	return cpu;
 }
 EXPORT_SYMBOL(cns3xxx_cpu_clock);
+
+atomic_t usb_pwr_ref = ATOMIC_INIT(0);
+EXPORT_SYMBOL(usb_pwr_ref);