arch/arm/mach-mxs/mach-mx28evk.c

   1 /*
   2  * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/gpio.h>
  18 #include <linux/irq.h>
  19 #include <linux/clk.h>
  20
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/time.h>
  24
  25 #include <mach/common.h>
  26 #include <mach/iomux-mx28.h>
  27
  28 #include "devices-mx28.h"
  29 #include "gpio.h"
  30
  31 #define MX28EVK_FEC_PHY_POWER   MXS_GPIO_NR(2, 15)
  32 #define MX28EVK_FEC_PHY_RESET   MXS_GPIO_NR(4, 13)
  33
  34 static const iomux_cfg_t mx28evk_pads[] __initconst = {
  35         /* duart */
  36         MX28_PAD_PWM0__DUART_RX |
  37                 (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
  38         MX28_PAD_PWM1__DUART_TX |
  39                 (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
  40
  41         /* fec0 */
  42         MX28_PAD_ENET0_MDC__ENET0_MDC |
  43                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  44         MX28_PAD_ENET0_MDIO__ENET0_MDIO |
  45                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  46         MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
  47                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  48         MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
  49                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  50         MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
  51                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  52         MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
  53                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  54         MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
  55                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  56         MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
  57                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  58         MX28_PAD_ENET_CLK__CLKCTRL_ENET |
  59                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  60         /* fec1 */
  61         MX28_PAD_ENET0_CRS__ENET1_RX_EN |
  62                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  63         MX28_PAD_ENET0_RXD2__ENET1_RXD0 |
  64                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  65         MX28_PAD_ENET0_RXD3__ENET1_RXD1 |
  66                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  67         MX28_PAD_ENET0_COL__ENET1_TX_EN |
  68                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  69         MX28_PAD_ENET0_TXD2__ENET1_TXD0 |
  70                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  71         MX28_PAD_ENET0_TXD3__ENET1_TXD1 |
  72                 (MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
  73         /* phy power line */
  74         MX28_PAD_SSP1_DATA3__GPIO_2_15 |
  75                 (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
  76         /* phy reset line */
  77         MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
  78                 (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
  79 };
  80
  81 /* fec */
  82 static void __init mx28evk_fec_reset(void)
  83 {
  84         int ret;
  85         struct clk *clk;
  86
  87         /* Enable fec phy clock */
  88         clk = clk_get_sys("pll2", NULL);
  89         if (!IS_ERR(clk))
  90                 clk_enable(clk);
  91
  92         /* Power up fec phy */
  93         ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
  94         if (ret) {
  95                 pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
  96                 return;
  97         }
  98
  99         ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
 100         if (ret) {
 101                 pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
 102                 return;
 103         }
 104
 105         /* Reset fec phy */
 106         ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
 107         if (ret) {
 108                 pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
 109                 return;
 110         }
 111
 112         gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
 113         if (ret) {
 114                 pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
 115                 return;
 116         }
 117
 118         mdelay(1);
 119         gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
 120 }
 121
 122 static struct fec_platform_data mx28_fec_pdata[] = {
 123         {
 124                 /* fec0 */
 125                 .phy = PHY_INTERFACE_MODE_RMII,
 126         }, {
 127                 /* fec1 */
 128                 .phy = PHY_INTERFACE_MODE_RMII,
 129         },
 130 };
 131
 132 static void __init mx28evk_init(void)
 133 {
 134         mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
 135
 136         mx28_add_duart();
 137
 138         mx28evk_fec_reset();
 139         mx28_add_fec(0, &mx28_fec_pdata[0]);
 140         mx28_add_fec(1, &mx28_fec_pdata[1]);
 141 }
 142
 143 static void __init mx28evk_timer_init(void)
 144 {
 145         mx28_clocks_init();
 146 }
 147
 148 static struct sys_timer mx28evk_timer = {
 149         .init   = mx28evk_timer_init,
 150 };
 151
 152 MACHINE_START(MX28EVK, "Freescale MX28 EVK")
 153         /* Maintainer: Freescale Semiconductor, Inc. */
 154         .map_io         = mx28_map_io,
 155         .init_irq       = mx28_init_irq,
 156         .init_machine   = mx28evk_init,
 157         .timer          = &mx28evk_timer,
 158 MACHINE_END