![Peter Korsgaard](/assets/img/avatar_default.png)
usb0 and usb1 mux settings in the sicrl register were swapped (twice!) in mpc834x_usb_cfg(), leading to various strange issues with fsl-ehci and full speed devices. The USB port config on mpc834x is done using 2 muxes: Port 0 is always used for MPH port 0, and port 1 can either be used for MPH port 1 or DR (unless DR uses UTMI phy or OTG, then it uses both ports) - See 8349 RM figure 1-4.. mpc8349_usb_cfg() had this inverted for the DR, and it also had the bit positions of the usb0 / usb1 mux settings swapped. It would basically work if you specified port1 instead of port0 for the MPH controller (and happened to use ULPI phys), which is what all the 834x dts have done, even though that configuration is physically invalid. Instead fix mpc8349_usb_cfg() and adjust the dts files to match reality. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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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