board/logicpd/am3517evm/am3517evm.c

   1 /*
   2  * am3517evm.c - board file for TI's AM3517 family of devices.
   3  *
   4  * Author: Vaibhav Hiremath <hvaibhav@ti.com>
   5  *
   6  * Based on ti/evm/evm.c
   7  *
   8  * Copyright (C) 2010
   9  * Texas Instruments Incorporated - http://www.ti.com/
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <asm/io.h>
  16 #include <asm/omap_musb.h>
  17 #include <asm/arch/am35x_def.h>
  18 #include <asm/arch/mem.h>
  19 #include <asm/arch/mux.h>
  20 #include <asm/arch/sys_proto.h>
  21 #include <asm/arch/mmc_host_def.h>
  22 #include <asm/arch/musb.h>
  23 #include <asm/mach-types.h>
  24 #include <linux/errno.h>
  25 #include <asm/gpio.h>
  26 #include <linux/usb/ch9.h>
  27 #include <linux/usb/gadget.h>
  28 #include <linux/usb/musb.h>
  29 #include <i2c.h>
  30 #include <netdev.h>
  31 #include "am3517evm.h"
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 #define AM3517_IP_SW_RESET      0x48002598
  36 #define CPGMACSS_SW_RST         (1 << 1)
  37
  38 /*
  39  * Routine: board_init
  40  * Description: Early hardware init.
  41  */
  42 int board_init(void)
  43 {
  44         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  45         /* board id for Linux */
  46         gd->bd->bi_arch_number = MACH_TYPE_OMAP3517EVM;
  47         /* boot param addr */
  48         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  49
  50         return 0;
  51 }
  52
  53 #ifdef CONFIG_USB_MUSB_AM35X
  54 static struct musb_hdrc_config musb_config = {
  55         .multipoint     = 1,
  56         .dyn_fifo       = 1,
  57         .num_eps        = 16,
  58         .ram_bits       = 12,
  59 };
  60
  61 static struct omap_musb_board_data musb_board_data = {
  62         .set_phy_power          = am35x_musb_phy_power,
  63         .clear_irq              = am35x_musb_clear_irq,
  64         .reset                  = am35x_musb_reset,
  65 };
  66
  67 static struct musb_hdrc_platform_data musb_plat = {
  68 #if defined(CONFIG_USB_MUSB_HOST)
  69         .mode           = MUSB_HOST,
  70 #elif defined(CONFIG_USB_MUSB_GADGET)
  71         .mode           = MUSB_PERIPHERAL,
  72 #else
  73 #error "Please define either CONFIG_USB_MUSB_HOST or CONFIG_USB_MUSB_GADGET"
  74 #endif
  75         .config         = &musb_config,
  76         .power          = 250,
  77         .platform_ops   = &am35x_ops,
  78         .board_data     = &musb_board_data,
  79 };
  80
  81 static void am3517_evm_musb_init(void)
  82 {
  83         /*
  84          * Set up USB clock/mode in the DEVCONF2 register.
  85          * USB2.0 PHY reference clock is 13 MHz
  86          */
  87         clrsetbits_le32(&am35x_scm_general_regs->devconf2,
  88                         CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE,
  89                         CONF2_REFFREQ_13MHZ | CONF2_SESENDEN |
  90                         CONF2_VBDTCTEN | CONF2_DATPOL);
  91
  92         musb_register(&musb_plat, &musb_board_data,
  93                         (void *)AM35XX_IPSS_USBOTGSS_BASE);
  94 }
  95 #else
  96 #define am3517_evm_musb_init() do {} while (0)
  97 #endif
  98
  99 /*
 100  * Routine: misc_init_r
 101  * Description: Init i2c, ethernet, etc... (done here so udelay works)
 102  */
 103 int misc_init_r(void)
 104 {
 105         volatile unsigned int ctr;
 106         u32 reset;
 107
 108 #ifdef CONFIG_SYS_I2C_OMAP24XX
 109         i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
 110 #endif
 111
 112         omap_die_id_display();
 113
 114         am3517_evm_musb_init();
 115
 116         /* activate PHY reset */
 117         gpio_direction_output(30, 0);
 118         gpio_set_value(30, 0);
 119
 120         ctr  = 0;
 121         do {
 122                 udelay(1000);
 123                 ctr++;
 124         } while (ctr < 300);
 125
 126         /* deactivate PHY reset */
 127         gpio_set_value(30, 1);
 128
 129         /* allow the PHY to stabilize and settle down */
 130         ctr = 0;
 131         do {
 132                 udelay(1000);
 133                 ctr++;
 134         } while (ctr < 300);
 135
 136         /* ensure that the module is out of reset */
 137         reset = readl(AM3517_IP_SW_RESET);
 138         reset &= (~CPGMACSS_SW_RST);
 139         writel(reset,AM3517_IP_SW_RESET);
 140
 141         return 0;
 142 }
 143
 144 /*
 145  * Routine: set_muxconf_regs
 146  * Description: Setting up the configuration Mux registers specific to the
 147  *              hardware. Many pins need to be moved from protect to primary
 148  *              mode.
 149  */
 150 void set_muxconf_regs(void)
 151 {
 152         MUX_AM3517EVM();
 153 }
 154
 155 #if defined(CONFIG_MMC)
 156 int board_mmc_init(bd_t *bis)
 157 {
 158         return omap_mmc_init(0, 0, 0, -1, -1);
 159 }
 160 #endif
 161
 162 #if defined(CONFIG_USB_ETHER) && defined(CONFIG_USB_MUSB_GADGET)
 163 int board_eth_init(bd_t *bis)
 164 {
 165         int rv, n = 0;
 166
 167         rv = cpu_eth_init(bis);
 168         if (rv > 0)
 169                 n += rv;
 170
 171         rv = usb_eth_initialize(bis);
 172         if (rv > 0)
 173                 n += rv;
 174
 175         return n;
 176 }
 177 #endif