drivers/usb/host/ehci-fsl.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
  *
  * Author: Tor Krill tor@excito.com
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <pci.h>
 #include <usb.h>
 #include <asm/io.h>
 #include <usb/ehci-fsl.h>
 #include <hwconfig.h>
 #include <fsl_usb.h>
 #include <fdt_support.h>

 #include "ehci.h"

 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
 #endif

 static void set_txfifothresh(struct usb_ehci *, u32);

 /* Check USB PHY clock valid */
 static int usb_phy_clk_valid(struct usb_ehci *ehci)
 {
 	if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
 			in_be32(&ehci->prictrl))) {
 		printf("USB PHY clock invalid!\n");
 		return 0;
 	} else {
 		return 1;
 	}
 }

 /*
  * Create the appropriate control structures to manage
  * a new EHCI host controller.
  *
  * Excerpts from linux ehci fsl driver.
  */
 int ehci_hcd_init(int index, enum usb_init_type init,
 		struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 {
 	struct usb_ehci *ehci = NULL;
 	const char *phy_type = NULL;
 	size_t len;
 	char current_usb_controller[5];
 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 	char usb_phy[5];

 	usb_phy[0] = '\0';
 #endif
 	if (has_erratum_a007075()) {
 		/*
 		 * A 5ms delay is needed after applying soft-reset to the
 		 * controller to let external ULPI phy come out of reset.
 		 * This delay needs to be added before re-initializing
 		 * the controller after soft-resetting completes
 		 */
 		mdelay(5);
 	}
 	memset(current_usb_controller, '\0', 5);
 	snprintf(current_usb_controller, 4, "usb%d", index+1);

 	switch (index) {
 	case 0:
 		ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
 		break;
 	case 1:
 		ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
 		break;
 	default:
 		printf("ERROR: wrong controller index!!\n");
 		return -EINVAL;
 	};

 	*hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
 	*hcor = (struct ehci_hcor *)((uint32_t) *hccr +
 			HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));

 	/* Set to Host mode */
 	setbits_le32(&ehci->usbmode, CM_HOST);

 	out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
 	out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);

 	/* Init phy */
 	if (hwconfig_sub(current_usb_controller, "phy_type"))
 		phy_type = hwconfig_subarg(current_usb_controller,
 				"phy_type", &len);
 	else
 		phy_type = getenv("usb_phy_type");

 	if (!phy_type) {
 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 		/* if none specified assume internal UTMI */
 		strcpy(usb_phy, "utmi");
 		phy_type = usb_phy;
 #else
 		printf("WARNING: USB phy type not defined !!\n");
 		return -1;
 #endif
 	}

 	if (!strncmp(phy_type, "utmi", 4)) {
 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
 		clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
 				PHY_CLK_SEL_UTMI);
 		clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
 				UTMI_PHY_EN);
 		udelay(1000); /* delay required for PHY Clk to appear */
 #endif
 		out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
 		clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
 				USB_EN);
 	} else {
 		clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
 				PHY_CLK_SEL_ULPI);
 		clrsetbits_be32(&ehci->control, UTMI_PHY_EN |
 				CONTROL_REGISTER_W1C_MASK, USB_EN);
 		udelay(1000); /* delay required for PHY Clk to appear */
 		if (!usb_phy_clk_valid(ehci))
 			return -EINVAL;
 		out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
 	}

 	out_be32(&ehci->prictrl, 0x0000000c);
 	out_be32(&ehci->age_cnt_limit, 0x00000040);
 	out_be32(&ehci->sictrl, 0x00000001);

 	in_le32(&ehci->usbmode);

 	if (has_erratum_a007798())
 		set_txfifothresh(ehci, TXFIFOTHRESH);

 	if (has_erratum_a004477()) {
 		/*
 		 * When reset is issued while any ULPI transaction is ongoing
 		 * then it may result to corruption of ULPI Function Control
 		 * Register which eventually causes phy clock to enter low
 		 * power mode which stops the clock. Thus delay is required
 		 * before reset to let ongoing ULPI transaction complete.
 		 */
 		udelay(1);
 	}
 	return 0;
 }

 /*
  * Destroy the appropriate control structures corresponding
  * the the EHCI host controller.
  */
 int ehci_hcd_stop(int index)
 {
 	return 0;
 }

 /*
  * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
  * to counter DDR latencies in writing data into Tx buffer.
  * This prevents Tx buffer from getting underrun
  */
 static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
 {
 	u32 cmd;
 	cmd = ehci_readl(&ehci->txfilltuning);
 	cmd &= ~TXFIFO_THRESH_MASK;
 	cmd |= TXFIFO_THRESH(txfifo_thresh);
 	ehci_writel(&ehci->txfilltuning, cmd);
 }

 #if defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB)
 static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
 				       const char *phy_type, int start_offset)
 {
 	const char *compat_dr = "fsl-usb2-dr";
 	const char *compat_mph = "fsl-usb2-mph";
 	const char *prop_mode = "dr_mode";
 	const char *prop_type = "phy_type";
 	const char *node_type = NULL;
 	int node_offset;
 	int err;

 	node_offset = fdt_node_offset_by_compatible(blob,
 						    start_offset, compat_mph);
 	if (node_offset < 0) {
 		node_offset = fdt_node_offset_by_compatible(blob,
 							    start_offset,
 							    compat_dr);
 		if (node_offset < 0) {
 			printf("WARNING: could not find compatible node: %s",
 			       fdt_strerror(node_offset));
 			return -1;
 		}
 		node_type = compat_dr;
 	} else {
 		node_type = compat_mph;
 	}

 	if (mode) {
 		err = fdt_setprop(blob, node_offset, prop_mode, mode,
 				  strlen(mode) + 1);
 		if (err < 0)
 			printf("WARNING: could not set %s for %s: %s.\n",
 			       prop_mode, node_type, fdt_strerror(err));
 	}

 	if (phy_type) {
 		err = fdt_setprop(blob, node_offset, prop_type, phy_type,
 				  strlen(phy_type) + 1);
 		if (err < 0)
 			printf("WARNING: could not set %s for %s: %s.\n",
 			       prop_type, node_type, fdt_strerror(err));
 	}

 	return node_offset;
 }

 static const char *fdt_usb_get_node_type(void *blob, int start_offset,
 					 int *node_offset)
 {
 	const char *compat_dr = "fsl-usb2-dr";
 	const char *compat_mph = "fsl-usb2-mph";
 	const char *node_type = NULL;

 	*node_offset = fdt_node_offset_by_compatible(blob, start_offset,
 						     compat_mph);
 	if (*node_offset < 0) {
 		*node_offset = fdt_node_offset_by_compatible(blob,
 							     start_offset,
 							     compat_dr);
 		if (*node_offset < 0) {
 			printf("ERROR: could not find compatible node: %s\n",
 			       fdt_strerror(*node_offset));
 		} else {
 			node_type = compat_dr;
 		}
 	} else {
 		node_type = compat_mph;
 	}

 	return node_type;
 }

 static int fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
 				 int start_offset)
 {
 	int node_offset, err;
 	const char *node_type = NULL;

 	node_type = fdt_usb_get_node_type(blob, start_offset, &node_offset);
 	if (!node_type)
 		return -1;

 	err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
 	if (err < 0) {
 		printf("ERROR: could not set %s for %s: %s.\n",
 		       prop_erratum, node_type, fdt_strerror(err));
 	}

 	return node_offset;
 }

 void fdt_fixup_dr_usb(void *blob, bd_t *bd)
 {
 	static const char * const modes[] = { "host", "peripheral", "otg" };
 	static const char * const phys[] = { "ulpi", "utmi", "utmi_dual" };
 	int usb_erratum_a006261_off = -1;
 	int usb_erratum_a007075_off = -1;
 	int usb_erratum_a007792_off = -1;
 	int usb_erratum_a005697_off = -1;
 	int usb_mode_off = -1;
 	int usb_phy_off = -1;
 	char str[5];
 	int i, j;

 	for (i = 1; i <= CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
 		const char *dr_mode_type = NULL;
 		const char *dr_phy_type = NULL;
 		int mode_idx = -1, phy_idx = -1;

 		snprintf(str, 5, "%s%d", "usb", i);
 		if (hwconfig(str)) {
 			for (j = 0; j < ARRAY_SIZE(modes); j++) {
 				if (hwconfig_subarg_cmp(str, "dr_mode",
 							modes[j])) {
 					mode_idx = j;
 					break;
 				}
 			}

 			for (j = 0; j < ARRAY_SIZE(phys); j++) {
 				if (hwconfig_subarg_cmp(str, "phy_type",
 							phys[j])) {
 					phy_idx = j;
 					break;
 				}
 			}

 			if (mode_idx < 0 && phy_idx < 0) {
 				printf("WARNING: invalid phy or mode\n");
 				return;
 			}

 			if (mode_idx > -1)
 				dr_mode_type = modes[mode_idx];

 			if (phy_idx > -1)
 				dr_phy_type = phys[phy_idx];
 		}

 		if (has_dual_phy())
 			dr_phy_type = phys[2];

 		usb_mode_off = fdt_fixup_usb_mode_phy_type(blob,
 							   dr_mode_type, NULL,
 							   usb_mode_off);

 		if (usb_mode_off < 0)
 			return;

 		usb_phy_off = fdt_fixup_usb_mode_phy_type(blob,
 							  NULL, dr_phy_type,
 							  usb_phy_off);

 		if (usb_phy_off < 0)
 			return;

 		if (has_erratum_a006261()) {
 			usb_erratum_a006261_off =  fdt_fixup_usb_erratum
 						   (blob,
 						    "fsl,usb-erratum-a006261",
 						    usb_erratum_a006261_off);
 			if (usb_erratum_a006261_off < 0)
 				return;
 		}

 		if (has_erratum_a007075()) {
 			usb_erratum_a007075_off =  fdt_fixup_usb_erratum
 						   (blob,
 						    "fsl,usb-erratum-a007075",
 						    usb_erratum_a007075_off);
 			if (usb_erratum_a007075_off < 0)
 				return;
 		}

 		if (has_erratum_a007792()) {
 			usb_erratum_a007792_off =  fdt_fixup_usb_erratum
 						   (blob,
 						    "fsl,usb-erratum-a007792",
 						    usb_erratum_a007792_off);
 			if (usb_erratum_a007792_off < 0)
 				return;
 		}
 		if (has_erratum_a005697()) {
 			usb_erratum_a005697_off =  fdt_fixup_usb_erratum
 						   (blob,
 						    "fsl,usb-erratum-a005697",
 						    usb_erratum_a005697_off);
 			if (usb_erratum_a005697_off < 0)
 				return;
 		}
 	}
 }
 #endif
	/*
	* (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
	*
	* (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
	*
	* Author: Tor Krill tor@excito.com
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <pci.h>
	#include <usb.h>
	#include <asm/io.h>
	#include <usb/ehci-fsl.h>
	#include <hwconfig.h>
	#include <fsl_usb.h>
	#include <fdt_support.h>

	#include "ehci.h"

	#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
	#define CONFIG_USB_MAX_CONTROLLER_COUNT 1
	#endif

	static void set_txfifothresh(struct usb_ehci *, u32);

	/* Check USB PHY clock valid */
	static int usb_phy_clk_valid(struct usb_ehci *ehci)
	{
	if (!((in_be32(&ehci->control) & PHY_CLK_VALID) \|\|
	in_be32(&ehci->prictrl))) {
	printf("USB PHY clock invalid!\n");
	return 0;
	} else {
	return 1;
	}
	}

	/*
	* Create the appropriate control structures to manage
	* a new EHCI host controller.
	*
	* Excerpts from linux ehci fsl driver.
	*/
	int ehci_hcd_init(int index, enum usb_init_type init,
	struct ehci_hccr hccr, struct ehci_hcor hcor)
	{
	struct usb_ehci *ehci = NULL;
	const char *phy_type = NULL;
	size_t len;
	char current_usb_controller[5];
	#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
	char usb_phy[5];

	usb_phy[0] = '\0';
	#endif
	if (has_erratum_a007075()) {
	/*
	* A 5ms delay is needed after applying soft-reset to the
	* controller to let external ULPI phy come out of reset.
	* This delay needs to be added before re-initializing
	* the controller after soft-resetting completes
	*/
	mdelay(5);
	}
	memset(current_usb_controller, '\0', 5);
	snprintf(current_usb_controller, 4, "usb%d", index+1);

	switch (index) {
	case 0:
	ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
	break;
	case 1:
	ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
	break;
	default:
	printf("ERROR: wrong controller index!!\n");
	return -EINVAL;
	};

	hccr = (struct ehci_hccr )((uint32_t)&ehci->caplength);
	hcor = (struct ehci_hcor )((uint32_t) *hccr +
	HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));

	/* Set to Host mode */
	setbits_le32(&ehci->usbmode, CM_HOST);

	out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
	out_be32(&ehci->snoop2, 0x80000000 \| SNOOP_SIZE_2GB);

	/* Init phy */
	if (hwconfig_sub(current_usb_controller, "phy_type"))
	phy_type = hwconfig_subarg(current_usb_controller,
	"phy_type", &len);
	else
	phy_type = getenv("usb_phy_type");

	if (!phy_type) {
	#ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
	/* if none specified assume internal UTMI */
	strcpy(usb_phy, "utmi");
	phy_type = usb_phy;
	#else
	printf("WARNING: USB phy type not defined !!\n");
	return -1;
	#endif
	}

	if (!strncmp(phy_type, "utmi", 4)) {
	#if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
	clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
	PHY_CLK_SEL_UTMI);
	clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
	UTMI_PHY_EN);
	udelay(1000); /* delay required for PHY Clk to appear */
	#endif
	out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
	clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
	USB_EN);
	} else {
	clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
	PHY_CLK_SEL_ULPI);
	clrsetbits_be32(&ehci->control, UTMI_PHY_EN \|
	CONTROL_REGISTER_W1C_MASK, USB_EN);
	udelay(1000); /* delay required for PHY Clk to appear */
	if (!usb_phy_clk_valid(ehci))
	return -EINVAL;
	out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
	}

	out_be32(&ehci->prictrl, 0x0000000c);
	out_be32(&ehci->age_cnt_limit, 0x00000040);
	out_be32(&ehci->sictrl, 0x00000001);

	in_le32(&ehci->usbmode);

	if (has_erratum_a007798())
	set_txfifothresh(ehci, TXFIFOTHRESH);

	if (has_erratum_a004477()) {
	/*
	* When reset is issued while any ULPI transaction is ongoing
	* then it may result to corruption of ULPI Function Control
	* Register which eventually causes phy clock to enter low
	* power mode which stops the clock. Thus delay is required
	* before reset to let ongoing ULPI transaction complete.
	*/
	udelay(1);
	}
	return 0;
	}

	/*
	* Destroy the appropriate control structures corresponding
	* the the EHCI host controller.
	*/
	int ehci_hcd_stop(int index)
	{
	return 0;
	}

	/*
	* Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
	* to counter DDR latencies in writing data into Tx buffer.
	* This prevents Tx buffer from getting underrun
	*/
	static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
	{
	u32 cmd;
	cmd = ehci_readl(&ehci->txfilltuning);
	cmd &= ~TXFIFO_THRESH_MASK;
	cmd \|= TXFIFO_THRESH(txfifo_thresh);
	ehci_writel(&ehci->txfilltuning, cmd);
	}

	#if defined(CONFIG_HAS_FSL_DR_USB) \|\| defined(CONFIG_HAS_FSL_MPH_USB)
	static int fdt_fixup_usb_mode_phy_type(void blob, const char mode,
	const char *phy_type, int start_offset)
	{
	const char *compat_dr = "fsl-usb2-dr";
	const char *compat_mph = "fsl-usb2-mph";
	const char *prop_mode = "dr_mode";
	const char *prop_type = "phy_type";
	const char *node_type = NULL;
	int node_offset;
	int err;

	node_offset = fdt_node_offset_by_compatible(blob,
	start_offset, compat_mph);
	if (node_offset < 0) {
	node_offset = fdt_node_offset_by_compatible(blob,
	start_offset,
	compat_dr);
	if (node_offset < 0) {
	printf("WARNING: could not find compatible node: %s",
	fdt_strerror(node_offset));
	return -1;
	}
	node_type = compat_dr;
	} else {
	node_type = compat_mph;
	}

	if (mode) {
	err = fdt_setprop(blob, node_offset, prop_mode, mode,
	strlen(mode) + 1);
	if (err < 0)
	printf("WARNING: could not set %s for %s: %s.\n",
	prop_mode, node_type, fdt_strerror(err));
	}

	if (phy_type) {
	err = fdt_setprop(blob, node_offset, prop_type, phy_type,
	strlen(phy_type) + 1);
	if (err < 0)
	printf("WARNING: could not set %s for %s: %s.\n",
	prop_type, node_type, fdt_strerror(err));
	}

	return node_offset;
	}

	static const char fdt_usb_get_node_type(void blob, int start_offset,
	int *node_offset)
	{
	const char *compat_dr = "fsl-usb2-dr";
	const char *compat_mph = "fsl-usb2-mph";
	const char *node_type = NULL;

	*node_offset = fdt_node_offset_by_compatible(blob, start_offset,
	compat_mph);
	if (*node_offset < 0) {
	*node_offset = fdt_node_offset_by_compatible(blob,
	start_offset,
	compat_dr);
	if (*node_offset < 0) {
	printf("ERROR: could not find compatible node: %s\n",
	fdt_strerror(*node_offset));
	} else {
	node_type = compat_dr;
	}
	} else {
	node_type = compat_mph;
	}

	return node_type;
	}

	static int fdt_fixup_usb_erratum(void blob, const char prop_erratum,
	int start_offset)
	{
	int node_offset, err;
	const char *node_type = NULL;

	node_type = fdt_usb_get_node_type(blob, start_offset, &node_offset);
	if (!node_type)
	return -1;

	err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
	if (err < 0) {
	printf("ERROR: could not set %s for %s: %s.\n",
	prop_erratum, node_type, fdt_strerror(err));
	}

	return node_offset;
	}

	void fdt_fixup_dr_usb(void blob, bd_t bd)
	{
	static const char * const modes[] = { "host", "peripheral", "otg" };
	static const char * const phys[] = { "ulpi", "utmi", "utmi_dual" };
	int usb_erratum_a006261_off = -1;
	int usb_erratum_a007075_off = -1;
	int usb_erratum_a007792_off = -1;
	int usb_erratum_a005697_off = -1;
	int usb_mode_off = -1;
	int usb_phy_off = -1;
	char str[5];
	int i, j;

	for (i = 1; i <= CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
	const char *dr_mode_type = NULL;
	const char *dr_phy_type = NULL;
	int mode_idx = -1, phy_idx = -1;

	snprintf(str, 5, "%s%d", "usb", i);
	if (hwconfig(str)) {
	for (j = 0; j < ARRAY_SIZE(modes); j++) {
	if (hwconfig_subarg_cmp(str, "dr_mode",
	modes[j])) {
	mode_idx = j;
	break;
	}
	}

	for (j = 0; j < ARRAY_SIZE(phys); j++) {
	if (hwconfig_subarg_cmp(str, "phy_type",
	phys[j])) {
	phy_idx = j;
	break;
	}
	}

	if (mode_idx < 0 && phy_idx < 0) {
	printf("WARNING: invalid phy or mode\n");
	return;
	}

	if (mode_idx > -1)
	dr_mode_type = modes[mode_idx];

	if (phy_idx > -1)
	dr_phy_type = phys[phy_idx];
	}

	if (has_dual_phy())
	dr_phy_type = phys[2];

	usb_mode_off = fdt_fixup_usb_mode_phy_type(blob,
	dr_mode_type, NULL,
	usb_mode_off);

	if (usb_mode_off < 0)
	return;

	usb_phy_off = fdt_fixup_usb_mode_phy_type(blob,
	NULL, dr_phy_type,
	usb_phy_off);

	if (usb_phy_off < 0)
	return;

	if (has_erratum_a006261()) {
	usb_erratum_a006261_off = fdt_fixup_usb_erratum
	(blob,
	"fsl,usb-erratum-a006261",
	usb_erratum_a006261_off);
	if (usb_erratum_a006261_off < 0)
	return;
	}

	if (has_erratum_a007075()) {
	usb_erratum_a007075_off = fdt_fixup_usb_erratum
	(blob,
	"fsl,usb-erratum-a007075",
	usb_erratum_a007075_off);
	if (usb_erratum_a007075_off < 0)
	return;
	}

	if (has_erratum_a007792()) {
	usb_erratum_a007792_off = fdt_fixup_usb_erratum
	(blob,
	"fsl,usb-erratum-a007792",
	usb_erratum_a007792_off);
	if (usb_erratum_a007792_off < 0)
	return;
	}
	if (has_erratum_a005697()) {
	usb_erratum_a005697_off = fdt_fixup_usb_erratum
	(blob,
	"fsl,usb-erratum-a005697",
	usb_erratum_a005697_off);
	if (usb_erratum_a005697_off < 0)
	return;
	}
	}
	}
	#endif