arch/arm/mach-mx5/board-mx51_efikamx.c

   1 /*
   2  * Copyright (C) 2010 Linaro Limited
   3  *
   4  * based on code from the following
   5  * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
   6  * Copyright 2009-2010 Pegatron Corporation. All Rights Reserved.
   7  * Copyright 2009-2010 Genesi USA, Inc. All Rights Reserved.
   8  *
   9  * The code contained herein is licensed under the GNU General Public
  10  * License. You may obtain a copy of the GNU General Public License
  11  * Version 2 or later at the following locations:
  12  *
  13  * http://www.opensource.org/licenses/gpl-license.html
  14  * http://www.gnu.org/copyleft/gpl.html
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/i2c.h>
  20 #include <linux/gpio.h>
  21 #include <linux/delay.h>
  22 #include <linux/io.h>
  23 #include <linux/fsl_devices.h>
  24
  25 #include <mach/common.h>
  26 #include <mach/hardware.h>
  27 #include <mach/iomux-mx51.h>
  28 #include <mach/i2c.h>
  29 #include <mach/mxc_ehci.h>
  30
  31 #include <asm/irq.h>
  32 #include <asm/setup.h>
  33 #include <asm/mach-types.h>
  34 #include <asm/mach/arch.h>
  35 #include <asm/mach/time.h>
  36
  37 #include "devices-imx51.h"
  38 #include "devices.h"
  39
  40 #define MX51_USB_PLL_DIV_24_MHZ 0x01
  41
  42 static iomux_v3_cfg_t mx51efikamx_pads[] = {
  43         /* UART1 */
  44         MX51_PAD_UART1_RXD__UART1_RXD,
  45         MX51_PAD_UART1_TXD__UART1_TXD,
  46         MX51_PAD_UART1_RTS__UART1_RTS,
  47         MX51_PAD_UART1_CTS__UART1_CTS,
  48 };
  49
  50 /* Serial ports */
  51 #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
  52 static const struct imxuart_platform_data uart_pdata = {
  53         .flags = IMXUART_HAVE_RTSCTS,
  54 };
  55
  56 static inline void mxc_init_imx_uart(void)
  57 {
  58         imx51_add_imx_uart(0, &uart_pdata);
  59         imx51_add_imx_uart(1, &uart_pdata);
  60         imx51_add_imx_uart(2, &uart_pdata);
  61 }
  62 #else /* !SERIAL_IMX */
  63 static inline void mxc_init_imx_uart(void)
  64 {
  65 }
  66 #endif /* SERIAL_IMX */
  67
  68 /* This function is board specific as the bit mask for the plldiv will also
  69  * be different for other Freescale SoCs, thus a common bitmask is not
  70  * possible and cannot get place in /plat-mxc/ehci.c.
  71  */
  72 static int initialize_otg_port(struct platform_device *pdev)
  73 {
  74         u32 v;
  75         void __iomem *usb_base;
  76         void __iomem *usbother_base;
  77         usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
  78         usbother_base = (void __iomem *)(usb_base + MX5_USBOTHER_REGS_OFFSET);
  79
  80         /* Set the PHY clock to 19.2MHz */
  81         v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
  82         v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
  83         v |= MX51_USB_PLL_DIV_24_MHZ;
  84         __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
  85         iounmap(usb_base);
  86         return 0;
  87 }
  88
  89 static struct mxc_usbh_platform_data dr_utmi_config = {
  90         .init   = initialize_otg_port,
  91         .portsc = MXC_EHCI_UTMI_16BIT,
  92         .flags  = MXC_EHCI_INTERNAL_PHY,
  93 };
  94
  95 static void __init mxc_board_init(void)
  96 {
  97         mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
  98                                         ARRAY_SIZE(mx51efikamx_pads));
  99         mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
 100         mxc_init_imx_uart();
 101 }
 102
 103 static void __init mx51_efikamx_timer_init(void)
 104 {
 105         mx51_clocks_init(32768, 24000000, 22579200, 24576000);
 106 }
 107
 108 static struct sys_timer mxc_timer = {
 109         .init   = mx51_efikamx_timer_init,
 110 };
 111
 112 MACHINE_START(MX51_EFIKAMX, "Genesi EfikaMX nettop")
 113         /* Maintainer: Amit Kucheria <amit.kucheria@linaro.org> */
 114         .boot_params = MX51_PHYS_OFFSET + 0x100,
 115         .map_io = mx51_map_io,
 116         .init_irq = mx51_init_irq,
 117         .init_machine =  mxc_board_init,
 118         .timer = &mxc_timer,
 119 MACHINE_END