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      1 // SPDX-License-Identifier: GPL-2.0+
      2 /*
      3  * am3517evm.c - board file for TI's AM3517 family of devices.
      4  *
      5  * Author: Vaibhav Hiremath <hvaibhav (at) ti.com>
      6  *
      7  * Based on ti/evm/evm.c
      8  *
      9  * Copyright (C) 2010
     10  * Texas Instruments Incorporated - http://www.ti.com/
     11  */
     12 
     13 #include <common.h>
     14 #include <dm.h>
     15 #include <ns16550.h>
     16 #include <asm/io.h>
     17 #include <asm/omap_musb.h>
     18 #include <asm/arch/am35x_def.h>
     19 #include <asm/arch/mem.h>
     20 #include <asm/arch/mux.h>
     21 #include <asm/arch/sys_proto.h>
     22 #include <asm/arch/mmc_host_def.h>
     23 #include <asm/arch/musb.h>
     24 #include <asm/mach-types.h>
     25 #include <linux/errno.h>
     26 #include <asm/gpio.h>
     27 #include <linux/usb/ch9.h>
     28 #include <linux/usb/gadget.h>
     29 #include <linux/usb/musb.h>
     30 #include <i2c.h>
     31 #include <netdev.h>
     32 #include "am3517evm.h"
     33 
     34 DECLARE_GLOBAL_DATA_PTR;
     35 
     36 #define AM3517_IP_SW_RESET	0x48002598
     37 #define CPGMACSS_SW_RST		(1 << 1)
     38 #define PHY_GPIO		30
     39 
     40 
     41 /*
     42  * Routine: board_init
     43  * Description: Early hardware init.
     44  */
     45 int board_init(void)
     46 {
     47 	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
     48 	/* board id for Linux */
     49 	gd->bd->bi_arch_number = MACH_TYPE_OMAP3517EVM;
     50 	/* boot param addr */
     51 	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
     52 
     53 	return 0;
     54 }
     55 
     56 #ifdef CONFIG_USB_MUSB_AM35X
     57 static struct musb_hdrc_config musb_config = {
     58 	.multipoint     = 1,
     59 	.dyn_fifo       = 1,
     60 	.num_eps        = 16,
     61 	.ram_bits       = 12,
     62 };
     63 
     64 static struct omap_musb_board_data musb_board_data = {
     65 	.set_phy_power		= am35x_musb_phy_power,
     66 	.clear_irq		= am35x_musb_clear_irq,
     67 	.reset			= am35x_musb_reset,
     68 };
     69 
     70 static struct musb_hdrc_platform_data musb_plat = {
     71 #if defined(CONFIG_USB_MUSB_HOST)
     72 	.mode           = MUSB_HOST,
     73 #elif defined(CONFIG_USB_MUSB_GADGET)
     74 	.mode		= MUSB_PERIPHERAL,
     75 #else
     76 #error "Please define either CONFIG_USB_MUSB_HOST or CONFIG_USB_MUSB_GADGET"
     77 #endif
     78 	.config         = &musb_config,
     79 	.power          = 250,
     80 	.platform_ops	= &am35x_ops,
     81 	.board_data	= &musb_board_data,
     82 };
     83 
     84 static void am3517_evm_musb_init(void)
     85 {
     86 	/*
     87 	 * Set up USB clock/mode in the DEVCONF2 register.
     88 	 * USB2.0 PHY reference clock is 13 MHz
     89 	 */
     90 	clrsetbits_le32(&am35x_scm_general_regs->devconf2,
     91 			CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE,
     92 			CONF2_REFFREQ_13MHZ | CONF2_SESENDEN |
     93 			CONF2_VBDTCTEN | CONF2_DATPOL);
     94 
     95 	musb_register(&musb_plat, &musb_board_data,
     96 			(void *)AM35XX_IPSS_USBOTGSS_BASE);
     97 }
     98 #else
     99 #define am3517_evm_musb_init() do {} while (0)
    100 #endif
    101 
    102 /*
    103  * Routine: misc_init_r
    104  * Description: Init i2c, ethernet, etc... (done here so udelay works)
    105  */
    106 int misc_init_r(void)
    107 {
    108 	volatile unsigned int ctr;
    109 	u32 reset;
    110 
    111 #ifdef CONFIG_SYS_I2C_OMAP24XX
    112 	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
    113 #endif
    114 
    115 	omap_die_id_display();
    116 
    117 	am3517_evm_musb_init();
    118 
    119 	if (gpio_request(PHY_GPIO, "gpio_30") == 0) {
    120 		/* activate PHY reset */
    121 		gpio_direction_output(PHY_GPIO, 0);
    122 		gpio_set_value(PHY_GPIO, 0);
    123 
    124 		ctr  = 0;
    125 		do {
    126 			udelay(1000);
    127 			ctr++;
    128 		} while (ctr < 300);
    129 
    130 		/* deactivate PHY reset */
    131 		gpio_set_value(PHY_GPIO, 1);
    132 
    133 		/* allow the PHY to stabilize and settle down */
    134 		ctr = 0;
    135 		do {
    136 			udelay(1000);
    137 			ctr++;
    138 		} while (ctr < 300);
    139 
    140 		/* ensure that the module is out of reset */
    141 		reset = readl(AM3517_IP_SW_RESET);
    142 		reset &= (~CPGMACSS_SW_RST);
    143 		writel(reset, AM3517_IP_SW_RESET);
    144 
    145 		/* Free requested GPIO */
    146 		gpio_free(PHY_GPIO);
    147 	}
    148 
    149 	return 0;
    150 }
    151 
    152 /*
    153  * Routine: set_muxconf_regs
    154  * Description: Setting up the configuration Mux registers specific to the
    155  *		hardware. Many pins need to be moved from protect to primary
    156  *		mode.
    157  */
    158 void set_muxconf_regs(void)
    159 {
    160 	MUX_AM3517EVM();
    161 }
    162 
    163 #if defined(CONFIG_MMC)
    164 int board_mmc_init(bd_t *bis)
    165 {
    166 	return omap_mmc_init(0, 0, 0, -1, -1);
    167 }
    168 #endif
    169 
    170 #if defined(CONFIG_USB_ETHER) && defined(CONFIG_USB_MUSB_GADGET)
    171 int board_eth_init(bd_t *bis)
    172 {
    173 	int rv, n = 0;
    174 
    175 	rv = cpu_eth_init(bis);
    176 	if (rv > 0)
    177 		n += rv;
    178 
    179 	rv = usb_eth_initialize(bis);
    180 	if (rv > 0)
    181 		n += rv;
    182 
    183 	return n;
    184 }
    185 #endif
    186