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/*
* Freescale 83xx USB SOC setup code
*
* Copyright (C) 2007 Freescale Semiconductor, Inc.
* Author: Li Yang
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <sysdev/fsl_soc.h>
#include "mpc83xx.h"
#ifdef CONFIG_MPC834x
int mpc834x_usb_cfg(void)
{
unsigned long sccr, sicrl, sicrh;
void __iomem *immap;
struct device_node *np = NULL;
int port0_is_dr = 0, port1_is_dr = 0;
const void *prop, *dr_mode;
immap = ioremap(get_immrbase(), 0x1000);
if (!immap)
return -ENOMEM;
/* Read registers */
/* Note: DR and MPH must use the same clock setting in SCCR */
sccr = in_be32(immap + MPC83XX_SCCR_OFFS) & ~MPC83XX_SCCR_USB_MASK;
sicrl = in_be32(immap + MPC83XX_SICRL_OFFS) & ~MPC834X_SICRL_USB_MASK;
sicrh = in_be32(immap + MPC83XX_SICRH_OFFS) & ~MPC834X_SICRH_USB_UTMI;
np = of_find_compatible_node(NULL, "usb", "fsl-usb2-dr");
if (np) {
sccr |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */
prop = of_get_property(np, "phy_type", NULL);
if (prop && (!strcmp(prop, "utmi") ||
!strcmp(prop, "utmi_wide"))) {
sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
sicrh |= MPC834X_SICRH_USB_UTMI;
port1_is_dr = 1;
} else if (prop && !strcmp(prop, "serial")) {
dr_mode = of_get_property(np, "dr_mode", NULL);
if (dr_mode && !strcmp(dr_mode, "otg")) {
sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
port1_is_dr = 1;
} else {
sicrl |= MPC834X_SICRL_USB0;
}
} else if (prop && !strcmp(prop, "ulpi")) {
sicrl |= MPC834X_SICRL_USB0;
} else {
printk(KERN_WARNING "834x USB PHY type not supported\n");
}
port0_is_dr = 1;
of_node_put(np);
}
np = of_find_compatible_node(NULL, "usb", "fsl-usb2-mph");
if (np) {
sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
prop = of_get_property(np, "port0", NULL);
if (prop) {
if (port0_is_dr)
printk(KERN_WARNING
"834x USB port0 can't be used by both DR and MPH!\n");
sicrl &= ~MPC834X_SICRL_USB0;
}
prop = of_get_property(np, "port1", NULL);
if (prop) {
if (port1_is_dr)
printk(KERN_WARNING
"834x USB port1 can't be used by both DR and MPH!\n");
sicrl &= ~MPC834X_SICRL_USB1;
}
of_node_put(np);
}
/* Write back */
out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
out_be32(immap + MPC83XX_SICRH_OFFS, sicrh);
iounmap(immap);
return 0;
}
#endif /* CONFIG_MPC834x */
#ifdef CONFIG_PPC_MPC831x
int mpc831x_usb_cfg(void)
{
u32 temp;
void __iomem *immap, *usb_regs;
struct device_node *np = NULL;
const void *prop;
struct resource res;
int ret = 0;
#ifdef CONFIG_USB_OTG
const void *dr_mode;
#endif
np = of_find_compatible_node(NULL, "usb", "fsl-usb2-dr");
if (!np)
return -ENODEV;
prop = of_get_property(np, "phy_type", NULL);
/* Map IMMR space for pin and clock settings */
immap = ioremap(get_immrbase(), 0x1000);
if (!immap) {
of_node_put(np);
return -ENOMEM;
}
/* Configure clock */
temp = in_be32(immap + MPC83XX_SCCR_OFFS);
temp &= ~MPC83XX_SCCR_USB_MASK;
temp |= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */
out_be32(immap + MPC83XX_SCCR_OFFS, temp);
/* Configure pin mux for ULPI. There is no pin mux for UTMI */
if (!strcmp(prop, "ulpi")) {
temp = in_be32(immap + MPC83XX_SICRL_OFFS);
temp &= ~MPC831X_SICRL_USB_MASK;
temp |= MPC831X_SICRL_USB_ULPI;
out_be32(immap + MPC83XX_SICRL_OFFS, temp);
temp = in_be32(immap + MPC83XX_SICRH_OFFS);
temp &= ~MPC831X_SICRH_USB_MASK;
temp |= MPC831X_SICRH_USB_ULPI;
out_be32(immap + MPC83XX_SICRH_OFFS, temp);
}
iounmap(immap);
/* Map USB SOC space */
ret = of_address_to_resource(np, 0, &res);
if (ret) {
of_node_put(np);
return ret;
}
usb_regs = ioremap(res.start, res.end - res.start + 1);
/* Using on-chip PHY */
if (!strcmp(prop, "utmi_wide") ||
!strcmp(prop, "utmi")) {
/* Set UTMI_PHY_EN, REFSEL to 48MHZ */
out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
CONTROL_UTMI_PHY_EN | CONTROL_REFSEL_48MHZ);
/* Using external UPLI PHY */
} else if (!strcmp(prop, "ulpi")) {
/* Set PHY_CLK_SEL to ULPI */
temp = CONTROL_PHY_CLK_SEL_ULPI;
#ifdef CONFIG_USB_OTG
/* Set OTG_PORT */
dr_mode = of_get_property(np, "dr_mode", NULL);
if (dr_mode && !strcmp(dr_mode, "otg"))
temp |= CONTROL_OTG_PORT;
#endif /* CONFIG_USB_OTG */
out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
} else {
printk(KERN_WARNING "831x USB PHY type not supported\n");
ret = -EINVAL;
}
iounmap(usb_regs);
of_node_put(np);
return ret;
}
#endif /* CONFIG_PPC_MPC831x */
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