2 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/cpu.h>
11 #include <asm/arch/soc.h>
13 DECLARE_GLOBAL_DATA_PTR;
15 /* IO expander I2C device */
16 #define I2C_IO_EXP_ADDR 0x22
17 #define I2C_IO_CFG_REG_0 0x6
18 #define I2C_IO_DATA_OUT_REG_0 0x2
19 #define I2C_IO_REG_0_SATA_OFF 2
20 #define I2C_IO_REG_0_USB_H_OFF 1
22 #define PINCTRL_NB_REG_VALUE 0x000173fa
23 #define PINCTRL_SB_REG_VALUE 0x00007a23
25 int board_early_init_f(void)
27 const void *blob = gd->fdt_blob;
28 const char *bank_name;
29 const char *compat = "marvell,armada-3700-pinctl";
34 * Temporary WA for setting correct pin control values
35 * until the real pin control driver is awailable.
37 off = fdt_node_offset_by_compatible(blob, -1, compat);
38 while (off != -FDT_ERR_NOTFOUND) {
39 bank_name = fdt_getprop(blob, off, "bank-name", &len);
40 addr = (void __iomem *)fdtdec_get_addr_size_auto_noparent(
41 blob, off, "reg", 0, NULL, true);
42 if (!strncmp(bank_name, "armada-3700-nb", len))
43 writel(PINCTRL_NB_REG_VALUE, addr);
44 else if (!strncmp(bank_name, "armada-3700-sb", len))
45 writel(PINCTRL_SB_REG_VALUE, addr);
47 off = fdt_node_offset_by_compatible(blob, off, compat);
55 /* adress of boot parameters */
56 gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
61 /* Board specific AHCI / SATA enable code */
62 int board_ahci_enable(void)
68 /* Configure IO exander PCA9555: 7bit address 0x22 */
69 ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
71 printf("Cannot find PCA9555: %d\n", ret);
75 ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
77 printf("Failed to read IO expander value via I2C\n");
82 * Enable SATA power via IO expander connected via I2C by setting
83 * the corresponding bit to output mode to enable power for SATA
85 buf[0] &= ~(1 << I2C_IO_REG_0_SATA_OFF);
86 ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
88 printf("Failed to set IO expander via I2C\n");
95 /* Board specific xHCI enable code */
96 int board_xhci_enable(void)
102 /* Configure IO exander PCA9555: 7bit address 0x22 */
103 ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
105 printf("Cannot find PCA9555: %d\n", ret);
109 printf("Enable USB VBUS\n");
112 * Read configuration (direction) and set VBUS pin as output
113 * (reset pin = output)
115 ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
117 printf("Failed to read IO expander value via I2C\n");
120 buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
121 ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
123 printf("Failed to set IO expander via I2C\n");
127 /* Read VBUS output value and disable it */
128 ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
130 printf("Failed to read IO expander value via I2C\n");
133 buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
134 ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
136 printf("Failed to set IO expander via I2C\n");
141 * Required delay for configuration to settle - must wait for
142 * power on port is disabled in case VBUS signal was high,
143 * required 3 seconds delay to let VBUS signal fully settle down
147 /* Enable VBUS power: Set output value of VBUS pin as enabled */
148 buf[0] |= (1 << I2C_IO_REG_0_USB_H_OFF);
149 ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
151 printf("Failed to set IO expander via I2C\n");
155 mdelay(500); /* required delay to let output value settle */