244 lines
6.3 KiB
C
244 lines
6.3 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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 <asm/io.h>
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#include <asm/prom.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc83xx.h"
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#ifdef CONFIG_PPC_MPC834x
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int mpc834x_usb_cfg(void)
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{
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unsigned long sccr, sicrl, sicrh;
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void __iomem *immap;
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struct device_node *np = NULL;
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int port0_is_dr = 0, port1_is_dr = 0;
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const void *prop, *dr_mode;
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immap = ioremap(get_immrbase(), 0x1000);
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if (!immap)
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return -ENOMEM;
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/* Read registers */
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/* Note: DR and MPH must use the same clock setting in SCCR */
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sccr = in_be32(immap + MPC83XX_SCCR_OFFS) & ~MPC83XX_SCCR_USB_MASK;
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sicrl = in_be32(immap + MPC83XX_SICRL_OFFS) & ~MPC834X_SICRL_USB_MASK;
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sicrh = in_be32(immap + MPC83XX_SICRH_OFFS) & ~MPC834X_SICRH_USB_UTMI;
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np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
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if (np) {
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sccr |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */
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prop = of_get_property(np, "phy_type", NULL);
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port1_is_dr = 1;
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if (prop && (!strcmp(prop, "utmi") ||
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!strcmp(prop, "utmi_wide"))) {
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sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
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sicrh |= MPC834X_SICRH_USB_UTMI;
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port0_is_dr = 1;
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} else if (prop && !strcmp(prop, "serial")) {
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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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sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
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port0_is_dr = 1;
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} else {
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sicrl |= MPC834X_SICRL_USB1;
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}
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} else if (prop && !strcmp(prop, "ulpi")) {
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sicrl |= MPC834X_SICRL_USB1;
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} else {
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printk(KERN_WARNING "834x USB PHY type not supported\n");
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}
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of_node_put(np);
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}
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np = of_find_compatible_node(NULL, NULL, "fsl-usb2-mph");
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if (np) {
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sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
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prop = of_get_property(np, "port0", NULL);
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if (prop) {
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if (port0_is_dr)
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printk(KERN_WARNING
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"834x USB port0 can't be used by both DR and MPH!\n");
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sicrl &= ~MPC834X_SICRL_USB0;
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}
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prop = of_get_property(np, "port1", NULL);
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if (prop) {
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if (port1_is_dr)
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printk(KERN_WARNING
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"834x USB port1 can't be used by both DR and MPH!\n");
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sicrl &= ~MPC834X_SICRL_USB1;
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}
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of_node_put(np);
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}
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/* Write back */
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out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
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out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
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out_be32(immap + MPC83XX_SICRH_OFFS, sicrh);
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iounmap(immap);
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return 0;
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}
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#endif /* CONFIG_PPC_MPC834x */
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#ifdef CONFIG_PPC_MPC831x
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int 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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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,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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if (immr_node)
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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, res.end - res.start + 1);
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/* Using on-chip PHY */
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if (prop && (!strcmp(prop, "utmi_wide") ||
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!strcmp(prop, "utmi"))) {
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u32 refsel;
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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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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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#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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printk(KERN_WARNING "831x USB PHY type not supported\n");
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ret = -EINVAL;
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}
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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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#endif /* CONFIG_PPC_MPC831x */
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#ifdef CONFIG_PPC_MPC837x
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int mpc837x_usb_cfg(void)
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{
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void __iomem *immap;
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struct device_node *np = NULL;
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const void *prop;
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int ret = 0;
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np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
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if (!np || !of_device_is_available(np))
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return -ENODEV;
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prop = of_get_property(np, "phy_type", NULL);
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if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
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printk(KERN_WARNING "837x USB PHY type not supported\n");
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of_node_put(np);
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return -EINVAL;
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}
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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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clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
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MPC837X_SCCR_USB_DRCM_11);
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/* Configure pin mux for ULPI/serial */
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clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
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MPC837X_SICRL_USB_ULPI);
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iounmap(immap);
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of_node_put(np);
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return ret;
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}
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#endif /* CONFIG_PPC_MPC837x */
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