arm: atmel: at91sam9n12ek: add usb host support

Add usb host support for at91sam9n12ek board.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>

arch/arm/include/asm/arch-at91/at91_pmc.h

@@ -233,6 +233,8 @@ typedef struct at91_pmc {
 #endif
 #define		AT91_PMC_USBS_USB_PLLA		(0x0)		/* USB Clock Input is PLLA */
 #define		AT91_PMC_USBS_USB_UPLL		(0x1)		/* USB Clock Input is UPLL */
+#define		AT91_PMC_USBS_USB_PLLB		(0x1)		/* USB Clock Input is PLLB, AT91SAM9N12 only */
+#define		AT91_PMC_USB_DIV_2		(0x1 <<  8)	/* USB Clock divided by 2 */
 #define		AT91_PMC_USBDIV_8		(0x7 <<  8)	/* USB Clock divided by 8 */
 #define		AT91_PMC_USBDIV_10		(0x9 <<  8)	/* USB Clock divided by 10 */
 

board/atmel/at91sam9n12ek/at91sam9n12ek.c

@@ -199,6 +199,13 @@ void at91sam9n12ek_ks8851_hw_init(void)
 }
 #endif
 
+#ifdef CONFIG_USB_ATMEL
+void at91sam9n12ek_usb_hw_init(void)
+{
+	at91_set_pio_output(AT91_PIO_PORTB, 7, 0);
+}
+#endif
+
 int board_early_init_f(void)
 {
 	/* Enable clocks for all PIOs */
@@ -230,6 +237,10 @@ int board_init(void)
 	at91sam9n12ek_ks8851_hw_init();
 #endif
 
+#ifdef CONFIG_USB_ATMEL
+	at91sam9n12ek_usb_hw_init();
+#endif
+
 	return 0;
 }
 

drivers/usb/host/ohci-at91.c

@@ -20,11 +20,14 @@ int usb_cpu_init(void)
 
 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
-    defined(CONFIG_AT91SAM9261)
+	defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9N12)
 	/* Enable PLLB */
 	writel(get_pllb_init(), &pmc->pllbr);
 	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
 		;
+#ifdef CONFIG_AT91SAM9N12
+	writel(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2, &pmc->usb);
+#endif
 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
 	defined(CONFIG_AT91SAM9X5) || defined(CONFIG_SAMA5D3)
 	/* Enable UPLL */
@@ -71,7 +74,11 @@ int usb_cpu_stop(void)
 #endif
 
 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
-    defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20)
+	defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
+	defined(CONFIG_AT91SAM9N12)
+#ifdef CONFIG_AT91SAM9N12
+	writel(0, &pmc->usb);
+#endif
 	/* Disable PLLB */
 	writel(0, &pmc->pllbr);
 	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)

include/configs/at91sam9n12ek.h

@@ -83,6 +83,7 @@
 #define CONFIG_CMD_SF
 #define CONFIG_CMD_MMC
 #define CONFIG_CMD_FAT
+#define CONFIG_CMD_USB
 
 #define CONFIG_NR_DRAM_BANKS		1
 #define CONFIG_SYS_SDRAM_BASE		0x20000000
@@ -163,6 +164,17 @@
 #define CONFIG_SYS_MEMTEST_START	CONFIG_SYS_SDRAM_BASE
 #define CONFIG_SYS_MEMTEST_END		0x26e00000
 
+/* USB host */
+#ifdef CONFIG_CMD_USB
+#define CONFIG_USB_ATMEL
+#define CONFIG_USB_OHCI_NEW
+#define CONFIG_SYS_USB_OHCI_CPU_INIT
+#define CONFIG_SYS_USB_OHCI_REGS_BASE	ATMEL_BASE_OHCI
+#define CONFIG_SYS_USB_OHCI_SLOT_NAME	"at91sam9n12"
+#define CONFIG_SYS_USB_OHCI_MAX_ROOT_PORTS	1
+#define CONFIG_USB_STORAGE
+#endif
+
 #ifdef CONFIG_SYS_USE_SPIFLASH
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */