/* * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright (C) 2009-2010 Amit Kucheria * * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: * * http://www.opensource.org/licenses/gpl-license.html * http://www.gnu.org/copyleft/gpl.html */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "devices.h" #define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */ #define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */ /* USB_CTRL_1 */ #define MX51_USB_CTRL_1_OFFSET 0x10 #define MX51_USB_CTRL_UH1_EXT_CLK_EN (1 << 25) #define MX51_USB_PLLDIV_12_MHZ 0x00 #define MX51_USB_PLL_DIV_19_2_MHZ 0x01 #define MX51_USB_PLL_DIV_24_MHZ 0x02 static struct platform_device *devices[] __initdata = { &mxc_fec_device, }; static struct pad_desc mx51babbage_pads[] = { /* UART1 */ MX51_PAD_UART1_RXD__UART1_RXD, MX51_PAD_UART1_TXD__UART1_TXD, MX51_PAD_UART1_RTS__UART1_RTS, MX51_PAD_UART1_CTS__UART1_CTS, /* UART2 */ MX51_PAD_UART2_RXD__UART2_RXD, MX51_PAD_UART2_TXD__UART2_TXD, /* UART3 */ MX51_PAD_EIM_D25__UART3_RXD, MX51_PAD_EIM_D26__UART3_TXD, MX51_PAD_EIM_D27__UART3_RTS, MX51_PAD_EIM_D24__UART3_CTS, /* USB HOST1 */ MX51_PAD_USBH1_CLK__USBH1_CLK, MX51_PAD_USBH1_DIR__USBH1_DIR, MX51_PAD_USBH1_NXT__USBH1_NXT, MX51_PAD_USBH1_DATA0__USBH1_DATA0, MX51_PAD_USBH1_DATA1__USBH1_DATA1, MX51_PAD_USBH1_DATA2__USBH1_DATA2, MX51_PAD_USBH1_DATA3__USBH1_DATA3, MX51_PAD_USBH1_DATA4__USBH1_DATA4, MX51_PAD_USBH1_DATA5__USBH1_DATA5, MX51_PAD_USBH1_DATA6__USBH1_DATA6, MX51_PAD_USBH1_DATA7__USBH1_DATA7, /* USB HUB reset line*/ MX51_PAD_GPIO_1_7__GPIO1_7, }; /* Serial ports */ #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE) static struct imxuart_platform_data uart_pdata = { .flags = IMXUART_HAVE_RTSCTS, }; static inline void mxc_init_imx_uart(void) { mxc_register_device(&mxc_uart_device0, &uart_pdata); mxc_register_device(&mxc_uart_device1, &uart_pdata); mxc_register_device(&mxc_uart_device2, &uart_pdata); } #else /* !SERIAL_IMX */ static inline void mxc_init_imx_uart(void) { } #endif /* SERIAL_IMX */ static int gpio_usbh1_active(void) { struct pad_desc usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27; int ret; /* Set USBH1_STP to GPIO and toggle it */ mxc_iomux_v3_setup_pad(&usbh1stp_gpio); ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp"); if (ret) { pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret); return ret; } gpio_direction_output(BABBAGE_USBH1_STP, 0); gpio_set_value(BABBAGE_USBH1_STP, 1); msleep(100); gpio_free(BABBAGE_USBH1_STP); return 0; } static inline void babbage_usbhub_reset(void) { int ret; /* Bring USB hub out of reset */ ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7"); if (ret) { printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret); return; } gpio_direction_output(BABBAGE_USB_HUB_RESET, 0); /* USB HUB RESET - De-assert USB HUB RESET_N */ msleep(1); gpio_set_value(BABBAGE_USB_HUB_RESET, 0); msleep(1); gpio_set_value(BABBAGE_USB_HUB_RESET, 1); } /* This function is board specific as the bit mask for the plldiv will also be different for other Freescale SoCs, thus a common bitmask is not possible and cannot get place in /plat-mxc/ehci.c.*/ static int initialize_otg_port(struct platform_device *pdev) { u32 v; void __iomem *usb_base; u32 usbother_base; usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K); usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET; /* Set the PHY clock to 19.2MHz */ v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET); v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK; v |= MX51_USB_PLL_DIV_19_2_MHZ; __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET); iounmap(usb_base); return 0; } static int initialize_usbh1_port(struct platform_device *pdev) { u32 v; void __iomem *usb_base; u32 usbother_base; usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K); usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET; /* The clock for the USBH1 ULPI port will come externally from the PHY. */ v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET); __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET); iounmap(usb_base); return 0; } static struct mxc_usbh_platform_data dr_utmi_config = { .init = initialize_otg_port, .portsc = MXC_EHCI_UTMI_16BIT, .flags = MXC_EHCI_INTERNAL_PHY, }; static struct fsl_usb2_platform_data usb_pdata = { .operating_mode = FSL_USB2_DR_DEVICE, .phy_mode = FSL_USB2_PHY_UTMI_WIDE, }; static struct mxc_usbh_platform_data usbh1_config = { .init = initialize_usbh1_port, .portsc = MXC_EHCI_MODE_ULPI, .flags = (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD), }; static int otg_mode_host; static int __init babbage_otg_mode(char *options) { if (!strcmp(options, "host")) otg_mode_host = 1; else if (!strcmp(options, "device")) otg_mode_host = 0; else pr_info("otg_mode neither \"host\" nor \"device\". " "Defaulting to device\n"); return 0; } __setup("otg_mode=", babbage_otg_mode); /* * Board specific initialization. */ static void __init mxc_board_init(void) { struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP; mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads, ARRAY_SIZE(mx51babbage_pads)); mxc_init_imx_uart(); platform_add_devices(devices, ARRAY_SIZE(devices)); if (otg_mode_host) mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config); else { initialize_otg_port(NULL); mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata); } gpio_usbh1_active(); mxc_register_device(&mxc_usbh1_device, &usbh1_config); /* setback USBH1_STP to be function */ mxc_iomux_v3_setup_pad(&usbh1stp); babbage_usbhub_reset(); } static void __init mx51_babbage_timer_init(void) { mx51_clocks_init(32768, 24000000, 22579200, 0); } static struct sys_timer mxc_timer = { .init = mx51_babbage_timer_init, }; MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board") /* Maintainer: Amit Kucheria */ .phys_io = MX51_AIPS1_BASE_ADDR, .io_pg_offst = ((MX51_AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc, .boot_params = PHYS_OFFSET + 0x100, .map_io = mx51_map_io, .init_irq = mx51_init_irq, .init_machine = mxc_board_init, .timer = &mxc_timer, MACHINE_END