1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Freescale 83xx USB SOC setup code 4 * 5 * Copyright (C) 2007 Freescale Semiconductor, Inc. 6 * Author: Li Yang 7 */ 8 9 #include <linux/stddef.h> 10 #include <linux/kernel.h> 11 #include <linux/errno.h> 12 #include <linux/of.h> 13 #include <linux/of_address.h> 14 #include <linux/io.h> 15 16 #include <sysdev/fsl_soc.h> 17 18 #include "mpc83xx.h" 19 20 int __init mpc837x_usb_cfg(void) 21 { 22 void __iomem *immap; 23 struct device_node *np = NULL; 24 const void *prop; 25 int ret = 0; 26 27 np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr"); 28 if (!np || !of_device_is_available(np)) { 29 of_node_put(np); 30 return -ENODEV; 31 } 32 prop = of_get_property(np, "phy_type", NULL); 33 34 if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) { 35 pr_warn("837x USB PHY type not supported\n"); 36 of_node_put(np); 37 return -EINVAL; 38 } 39 40 /* Map IMMR space for pin and clock settings */ 41 immap = ioremap(get_immrbase(), 0x1000); 42 if (!immap) { 43 of_node_put(np); 44 return -ENOMEM; 45 } 46 47 /* Configure clock */ 48 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11, 49 MPC837X_SCCR_USB_DRCM_11); 50 51 /* Configure pin mux for ULPI/serial */ 52 clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK, 53 MPC837X_SICRL_USB_ULPI); 54 55 iounmap(immap); 56 of_node_put(np); 57 return ret; 58 } 59