129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Freescale 83xx USB SOC setup code
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*
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* Copyright (C) 2007 Freescale Semiconductor, Inc.
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* Author: Li Yang
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/io.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc83xx.h"
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int __init mpc831x_usb_cfg(void)
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{
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u32 temp;
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void __iomem *immap, *usb_regs;
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struct device_node *np = NULL;
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struct device_node *immr_node = NULL;
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const void *prop;
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struct resource res;
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int ret = 0;
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#ifdef CONFIG_USB_OTG
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const void *dr_mode;
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#endif
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np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
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if (!np)
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return -ENODEV;
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prop = of_get_property(np, "phy_type", NULL);
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/* Map IMMR space for pin and clock settings */
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immap = ioremap(get_immrbase(), 0x1000);
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if (!immap) {
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of_node_put(np);
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return -ENOMEM;
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}
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/* Configure clock */
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immr_node = of_get_parent(np);
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if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") ||
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of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
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clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
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MPC8315_SCCR_USB_MASK,
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MPC8315_SCCR_USB_DRCM_01);
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else
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clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
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MPC83XX_SCCR_USB_MASK,
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MPC83XX_SCCR_USB_DRCM_11);
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/* Configure pin mux for ULPI. There is no pin mux for UTMI */
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if (prop && !strcmp(prop, "ulpi")) {
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if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
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clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
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MPC8308_SICRH_USB_MASK,
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MPC8308_SICRH_USB_ULPI);
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} else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
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clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
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MPC8315_SICRL_USB_MASK,
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MPC8315_SICRL_USB_ULPI);
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clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
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MPC8315_SICRH_USB_MASK,
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MPC8315_SICRH_USB_ULPI);
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} else {
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clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
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MPC831X_SICRL_USB_MASK,
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MPC831X_SICRL_USB_ULPI);
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clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
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MPC831X_SICRH_USB_MASK,
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MPC831X_SICRH_USB_ULPI);
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}
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}
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iounmap(immap);
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of_node_put(immr_node);
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/* Map USB SOC space */
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ret = of_address_to_resource(np, 0, &res);
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if (ret) {
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of_node_put(np);
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return ret;
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}
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usb_regs = ioremap(res.start, resource_size(&res));
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/* Using on-chip PHY */
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if (prop && (!strcmp(prop, "utmi_wide") || !strcmp(prop, "utmi"))) {
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u32 refsel;
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if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
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goto out;
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if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
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refsel = CONTROL_REFSEL_24MHZ;
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else
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refsel = CONTROL_REFSEL_48MHZ;
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/* Set UTMI_PHY_EN and REFSEL */
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out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
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CONTROL_UTMI_PHY_EN | refsel);
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/* Using external UPLI PHY */
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} else if (prop && !strcmp(prop, "ulpi")) {
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/* Set PHY_CLK_SEL to ULPI */
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temp = CONTROL_PHY_CLK_SEL_ULPI;
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#ifdef CONFIG_USB_OTG
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/* Set OTG_PORT */
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if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
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dr_mode = of_get_property(np, "dr_mode", NULL);
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if (dr_mode && !strcmp(dr_mode, "otg"))
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temp |= CONTROL_OTG_PORT;
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}
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#endif /* CONFIG_USB_OTG */
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out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
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} else {
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pr_warn("831x USB PHY type not supported\n");
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ret = -EINVAL;
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}
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out:
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iounmap(usb_regs);
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of_node_put(np);
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return ret;
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}
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