arch/powerpc/platforms/83xx/usb.c - kernel/quantenna - Git at Google

 /*
  * 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 <linux/of.h>

 #include <asm/io.h>
 #include <asm/prom.h>
 #include <sysdev/fsl_soc.h>

 #include "mpc83xx.h"


 #ifdef CONFIG_PPC_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, NULL, "fsl-usb2-dr");
 	if (np) {
 		sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */

 		prop = of_get_property(np, "phy_type", NULL);
 		port1_is_dr = 1;
 		if (prop && (!strcmp(prop, "utmi") ||
 					!strcmp(prop, "utmi_wide"))) {
 			sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
 			sicrh |= MPC834X_SICRH_USB_UTMI;
 			port0_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;
 				port0_is_dr = 1;
 			} else {
 				sicrl |= MPC834X_SICRL_USB1;
 			}
 		} else if (prop && !strcmp(prop, "ulpi")) {
 			sicrl |= MPC834X_SICRL_USB1;
 		} else {
 			printk(KERN_WARNING "834x USB PHY type not supported\n");
 		}
 		of_node_put(np);
 	}
 	np = of_find_compatible_node(NULL, NULL, "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_PPC_MPC834x */

 #ifdef CONFIG_PPC_MPC831x
 int mpc831x_usb_cfg(void)
 {
 	u32 temp;
 	void __iomem *immap, *usb_regs;
 	struct device_node *np = NULL;
 	struct device_node *immr_node = 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, NULL, "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 */
 	immr_node = of_get_parent(np);
 	if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") ||
 			of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
 		clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
 		                MPC8315_SCCR_USB_MASK,
 		                MPC8315_SCCR_USB_DRCM_01);
 	else
 		clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
 		                MPC83XX_SCCR_USB_MASK,
 		                MPC83XX_SCCR_USB_DRCM_11);

 	/* Configure pin mux for ULPI.  There is no pin mux for UTMI */
 	if (prop && !strcmp(prop, "ulpi")) {
 		if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
 			clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 					MPC8308_SICRH_USB_MASK,
 					MPC8308_SICRH_USB_ULPI);
 		} else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
 			clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
 					MPC8315_SICRL_USB_MASK,
 					MPC8315_SICRL_USB_ULPI);
 			clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 					MPC8315_SICRH_USB_MASK,
 					MPC8315_SICRH_USB_ULPI);
 		} else {
 			clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
 					MPC831X_SICRL_USB_MASK,
 					MPC831X_SICRL_USB_ULPI);
 			clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 					MPC831X_SICRH_USB_MASK,
 					MPC831X_SICRH_USB_ULPI);
 		}
 	}

 	iounmap(immap);

 	of_node_put(immr_node);

 	/* 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, resource_size(&res));

 	/* Using on-chip PHY */
 	if (prop && (!strcmp(prop, "utmi_wide") ||
 		     !strcmp(prop, "utmi"))) {
 		u32 refsel;

 		if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
 			goto out;

 		if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
 			refsel = CONTROL_REFSEL_24MHZ;
 		else
 			refsel = CONTROL_REFSEL_48MHZ;
 		/* Set UTMI_PHY_EN and REFSEL */
 		out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
 				CONTROL_UTMI_PHY_EN | refsel);
 	/* Using external UPLI PHY */
 	} else if (prop && !strcmp(prop, "ulpi")) {
 		/* Set PHY_CLK_SEL to ULPI */
 		temp = CONTROL_PHY_CLK_SEL_ULPI;
 #ifdef CONFIG_USB_OTG
 		/* Set OTG_PORT */
 		if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
 			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;
 	}

 out:
 	iounmap(usb_regs);
 	of_node_put(np);
 	return ret;
 }
 #endif /* CONFIG_PPC_MPC831x */

 #ifdef CONFIG_PPC_MPC837x
 int mpc837x_usb_cfg(void)
 {
 	void __iomem *immap;
 	struct device_node *np = NULL;
 	const void *prop;
 	int ret = 0;

 	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
 	if (!np || !of_device_is_available(np))
 		return -ENODEV;
 	prop = of_get_property(np, "phy_type", NULL);

 	if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
 		printk(KERN_WARNING "837x USB PHY type not supported\n");
 		of_node_put(np);
 		return -EINVAL;
 	}

 	/* Map IMMR space for pin and clock settings */
 	immap = ioremap(get_immrbase(), 0x1000);
 	if (!immap) {
 		of_node_put(np);
 		return -ENOMEM;
 	}

 	/* Configure clock */
 	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
 			MPC837X_SCCR_USB_DRCM_11);

 	/* Configure pin mux for ULPI/serial */
 	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
 			MPC837X_SICRL_USB_ULPI);

 	iounmap(immap);
 	of_node_put(np);
 	return ret;
 }
 #endif /* CONFIG_PPC_MPC837x */
	/*
	* 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 <linux/of.h>

	#include <asm/io.h>
	#include <asm/prom.h>
	#include <sysdev/fsl_soc.h>

	#include "mpc83xx.h"


	#ifdef CONFIG_PPC_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, NULL, "fsl-usb2-dr");
	if (np) {
	sccr \|= MPC83XX_SCCR_USB_DRCM_11; /* 1:3 */

	prop = of_get_property(np, "phy_type", NULL);
	port1_is_dr = 1;
	if (prop && (!strcmp(prop, "utmi") \|\|
	!strcmp(prop, "utmi_wide"))) {
	sicrl \|= MPC834X_SICRL_USB0 \| MPC834X_SICRL_USB1;
	sicrh \|= MPC834X_SICRH_USB_UTMI;
	port0_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;
	port0_is_dr = 1;
	} else {
	sicrl \|= MPC834X_SICRL_USB1;
	}
	} else if (prop && !strcmp(prop, "ulpi")) {
	sicrl \|= MPC834X_SICRL_USB1;
	} else {
	printk(KERN_WARNING "834x USB PHY type not supported\n");
	}
	of_node_put(np);
	}
	np = of_find_compatible_node(NULL, NULL, "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_PPC_MPC834x */

	#ifdef CONFIG_PPC_MPC831x
	int mpc831x_usb_cfg(void)
	{
	u32 temp;
	void __iomem immap, usb_regs;
	struct device_node *np = NULL;
	struct device_node *immr_node = 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, NULL, "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 */
	immr_node = of_get_parent(np);
	if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") \|\|
	of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
	MPC8315_SCCR_USB_MASK,
	MPC8315_SCCR_USB_DRCM_01);
	else
	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
	MPC83XX_SCCR_USB_MASK,
	MPC83XX_SCCR_USB_DRCM_11);

	/* Configure pin mux for ULPI. There is no pin mux for UTMI */
	if (prop && !strcmp(prop, "ulpi")) {
	if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
	clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
	MPC8308_SICRH_USB_MASK,
	MPC8308_SICRH_USB_ULPI);
	} else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
	MPC8315_SICRL_USB_MASK,
	MPC8315_SICRL_USB_ULPI);
	clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
	MPC8315_SICRH_USB_MASK,
	MPC8315_SICRH_USB_ULPI);
	} else {
	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
	MPC831X_SICRL_USB_MASK,
	MPC831X_SICRL_USB_ULPI);
	clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
	MPC831X_SICRH_USB_MASK,
	MPC831X_SICRH_USB_ULPI);
	}
	}

	iounmap(immap);

	of_node_put(immr_node);

	/* 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, resource_size(&res));

	/* Using on-chip PHY */
	if (prop && (!strcmp(prop, "utmi_wide") \|\|
	!strcmp(prop, "utmi"))) {
	u32 refsel;

	if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
	goto out;

	if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
	refsel = CONTROL_REFSEL_24MHZ;
	else
	refsel = CONTROL_REFSEL_48MHZ;
	/* Set UTMI_PHY_EN and REFSEL */
	out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
	CONTROL_UTMI_PHY_EN \| refsel);
	/* Using external UPLI PHY */
	} else if (prop && !strcmp(prop, "ulpi")) {
	/* Set PHY_CLK_SEL to ULPI */
	temp = CONTROL_PHY_CLK_SEL_ULPI;
	#ifdef CONFIG_USB_OTG
	/* Set OTG_PORT */
	if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
	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;
	}

	out:
	iounmap(usb_regs);
	of_node_put(np);
	return ret;
	}
	#endif /* CONFIG_PPC_MPC831x */

	#ifdef CONFIG_PPC_MPC837x
	int mpc837x_usb_cfg(void)
	{
	void __iomem *immap;
	struct device_node *np = NULL;
	const void *prop;
	int ret = 0;

	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
	if (!np \|\| !of_device_is_available(np))
	return -ENODEV;
	prop = of_get_property(np, "phy_type", NULL);

	if (!prop \|\| (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
	printk(KERN_WARNING "837x USB PHY type not supported\n");
	of_node_put(np);
	return -EINVAL;
	}

	/* Map IMMR space for pin and clock settings */
	immap = ioremap(get_immrbase(), 0x1000);
	if (!immap) {
	of_node_put(np);
	return -ENOMEM;
	}

	/* Configure clock */
	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
	MPC837X_SCCR_USB_DRCM_11);

	/* Configure pin mux for ULPI/serial */
	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
	MPC837X_SICRL_USB_ULPI);

	iounmap(immap);
	of_node_put(np);
	return ret;
	}
	#endif /* CONFIG_PPC_MPC837x */