/* * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400. * * (C) Copyright 2003 * Gary Jennejohn, DENX Software Engineering <gj@denx.de> * * See file CREDITS for list of people who contributed to this * project. * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * Note: Part of this code has been derived from linux * *//* * IMPORTANT NOTES * 1 - you MUST define LITTLEENDIAN in the configuration file for the *     board or this driver will NOT work! * 2 - this driver is intended for use with USB Mass Storage Devices *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes! */#include <common.h>#ifdef CONFIG_USB_OHCI#include <asm/hardware.h>#include <malloc.h>#include <usb.h>#include "usb_ohci.h"#define OHCI_USE_NPS		/* force NoPowerSwitching mode */#undef OHCI_VERBOSE_DEBUG	/* not always helpful */#define OHCI_VERBOSE_DEBUG	/* not always helpful *//* For initializing controller (mask in an HCFS mode too) */#define	OHCI_CONTROL_INIT \	(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE#define readl(a) (*((vu_long *)(a)))#define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))#define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })//#define DEBUG 1#undef DEBUG#ifdef DEBUG#define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)#else#define dbg(format, arg...) do {} while(0)#endif /* DEBUG */#define err(format, arg...) printf("ERROR: " format "\n", ## arg)#undef SHOW_INFO#ifdef SHOW_INFO#define info(format, arg...) printf("INFO: " format "\n", ## arg)#else#define info(format, arg...) do {} while(0)#endif#define m16_swap(x) swap_16(x)#define m32_swap(x) swap_32(x)/* global ohci_t */static ohci_t gohci;/* this must be aligned to a 256 byte boundary */struct ohci_hcca ghcca[1];/* a pointer to the aligned storage */struct ohci_hcca *phcca;/* this allocates EDs for all possible endpoints */struct ohci_device ohci_dev;/* urb_priv */urb_priv_t urb_priv;/* RHSC flag */int got_rhsc;/* device which was disconnected */struct usb_device *devgone;/*-------------------------------------------------------------------------*//* AMD-756 (D2 rev) reports corrupt register contents in some cases. * The erratum (#4) description is incorrect.  AMD's workaround waits * till some bits (mostly reserved) are clear; ok for all revs. */#define OHCI_QUIRK_AMD756 0xabcd#define read_roothub(hc, register, mask) ({ \	u32 temp = readl (&hc->regs->roothub.register); \	if (hc->flags & OHCI_QUIRK_AMD756) \		while (temp & mask) \			temp = readl (&hc->regs->roothub.register); \	temp; })static u32 roothub_a (struct ohci *hc)	{ return read_roothub (hc, a, 0xfc0fe000); }static inline u32 roothub_b (struct ohci *hc)	{ return readl (&hc->regs->roothub.b); }static inline u32 roothub_status (struct ohci *hc)	{ return readl (&hc->regs->roothub.status); }static u32 roothub_portstatus (struct ohci *hc, int i)	{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }/* forward declaration */static int hc_interrupt (void);static voidtd_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,	int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);/*-------------------------------------------------------------------------* * URB support functions *-------------------------------------------------------------------------*//* free HCD-private data associated with this URB */static void urb_free_priv (urb_priv_t * urb){	int		i;	int		last;	struct td	* td;	last = urb->length - 1;	if (last >= 0) {		for (i = 0; i <= last; i++) {			td = urb->td[i];			if (td) {				td->usb_dev = NULL;				urb->td[i] = NULL;			}		}	}}/*-------------------------------------------------------------------------*/#ifdef DEBUGstatic int sohci_get_current_frame_number (struct usb_device * dev);/* debug| print the main components of an URB * small: 0) header + data packets 1) just header */static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,	int transfer_len, struct devrequest * setup, char * str, int small){	urb_priv_t * purb = &urb_priv;	dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",			str,			sohci_get_current_frame_number (dev),			usb_pipedevice (pipe),			usb_pipeendpoint (pipe),			usb_pipeout (pipe)? 'O': 'I',			usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):				(usb_pipecontrol (pipe)? "CTRL": "BULK"),			purb->actual_length,			transfer_len, dev->status);#ifdef	OHCI_VERBOSE_DEBUG	if (!small) {		int i, len;		if (usb_pipecontrol (pipe)) {			printf (__FILE__ ": cmd(8):");			for (i = 0; i < 8 ; i++)				printf (" %02x", ((__u8 *) setup) [i]);			printf ("\n");		}		if (transfer_len > 0 && buffer) {			printf (__FILE__ ": data(%d/%d):",				purb->actual_length,				transfer_len);			len = usb_pipeout (pipe)?					transfer_len: purb->actual_length;			for (i = 0; i < 16 && i < len; i++)				printf (" %02x", ((__u8 *) buffer) [i]);			printf ("%s\n", i < len? "...": "");		}	}#endif}/* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/void ep_print_int_eds (ohci_t *ohci, char * str) {	int i, j;	 __u32 * ed_p;	for (i= 0; i < 32; i++) {		j = 5;		ed_p = &(ohci->hcca->int_table [i]);		if (*ed_p == 0)		    continue;		printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);		while (*ed_p != 0 && j--) {			ed_t *ed = (ed_t *)m32_swap(ed_p);			printf (" ed: %4x;", ed->hwINFO);			ed_p = &ed->hwNextED;		}		printf ("\n");	}}static void ohci_dump_intr_mask (char *label, __u32 mask){	dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",		label,		mask,		(mask & OHCI_INTR_MIE) ? " MIE" : "",		(mask & OHCI_INTR_OC) ? " OC" : "",		(mask & OHCI_INTR_RHSC) ? " RHSC" : "",		(mask & OHCI_INTR_FNO) ? " FNO" : "",		(mask & OHCI_INTR_UE) ? " UE" : "",		(mask & OHCI_INTR_RD) ? " RD" : "",		(mask & OHCI_INTR_SF) ? " SF" : "",		(mask & OHCI_INTR_WDH) ? " WDH" : "",		(mask & OHCI_INTR_SO) ? " SO" : ""		);}static void maybe_print_eds (char *label, __u32 value){	ed_t *edp = (ed_t *)value;	if (value) {		dbg ("%s %08x", label, value);		dbg ("%08x", edp->hwINFO);		dbg ("%08x", edp->hwTailP);		dbg ("%08x", edp->hwHeadP);		dbg ("%08x", edp->hwNextED);	}}static char * hcfs2string (int state){	switch (state) {		case OHCI_USB_RESET:	return "reset";		case OHCI_USB_RESUME:	return "resume";		case OHCI_USB_OPER:	return "operational";		case OHCI_USB_SUSPEND:	return "suspend";	}	return "?";}/* dump control and status registers */static void ohci_dump_status (ohci_t *controller){	struct ohci_regs	*regs = controller->regs;	__u32			temp;	temp = readl (&regs->revision) & 0xff;	if (temp != 0x10)		dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));	temp = readl (&regs->control);	dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,		(temp & OHCI_CTRL_RWE) ? " RWE" : "",		(temp & OHCI_CTRL_RWC) ? " RWC" : "",		(temp & OHCI_CTRL_IR) ? " IR" : "",		hcfs2string (temp & OHCI_CTRL_HCFS),		(temp & OHCI_CTRL_BLE) ? " BLE" : "",		(temp & OHCI_CTRL_CLE) ? " CLE" : "",		(temp & OHCI_CTRL_IE) ? " IE" : "",		(temp & OHCI_CTRL_PLE) ? " PLE" : "",		temp & OHCI_CTRL_CBSR		);	temp = readl (&regs->cmdstatus);	dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,		(temp & OHCI_SOC) >> 16,		(temp & OHCI_OCR) ? " OCR" : "",		(temp & OHCI_BLF) ? " BLF" : "",		(temp & OHCI_CLF) ? " CLF" : "",		(temp & OHCI_HCR) ? " HCR" : ""		);	ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));	ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));	maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));	maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));	maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));	maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));	maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));	maybe_print_eds ("donehead", readl (&regs->donehead));}static void ohci_dump_roothub (ohci_t *controller, int verbose){	__u32			temp, ndp, i;	temp = roothub_a (controller);	ndp = (temp & RH_A_NDP);	if (verbose) {		dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,			((temp & RH_A_POTPGT) >> 24) & 0xff,			(temp & RH_A_NOCP) ? " NOCP" : "",			(temp & RH_A_OCPM) ? " OCPM" : "",			(temp & RH_A_DT) ? " DT" : "",			(temp & RH_A_NPS) ? " NPS" : "",			(temp & RH_A_PSM) ? " PSM" : "",			ndp			);		temp = roothub_b (controller);		dbg ("roothub.b: %08x PPCM=%04x DR=%04x",			temp,			(temp & RH_B_PPCM) >> 16,			(temp & RH_B_DR)			);		temp = roothub_status (controller);		dbg ("roothub.status: %08x%s%s%s%s%s%s",			temp,			(temp & RH_HS_CRWE) ? " CRWE" : "",			(temp & RH_HS_OCIC) ? " OCIC" : "",			(temp & RH_HS_LPSC) ? " LPSC" : "",			(temp & RH_HS_DRWE) ? " DRWE" : "",			(temp & RH_HS_OCI) ? " OCI" : "",			(temp & RH_HS_LPS) ? " LPS" : ""			);	}	for (i = 0; i < ndp; i++) {		temp = roothub_portstatus (controller, i);		dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",			i,			temp,			(temp & RH_PS_PRSC) ? " PRSC" : "",			(temp & RH_PS_OCIC) ? " OCIC" : "",			(temp & RH_PS_PSSC) ? " PSSC" : "",			(temp & RH_PS_PESC) ? " PESC" : "",			(temp & RH_PS_CSC) ? " CSC" : "",			(temp & RH_PS_LSDA) ? " LSDA" : "",			(temp & RH_PS_PPS) ? " PPS" : "",			(temp & RH_PS_PRS) ? " PRS" : "",			(temp & RH_PS_POCI) ? " POCI" : "",			(temp & RH_PS_PSS) ? " PSS" : "",			(temp & RH_PS_PES) ? " PES" : "",			(temp & RH_PS_CCS) ? " CCS" : ""			);	}}static void ohci_dump (ohci_t *controller, int verbose){	dbg ("OHCI controller usb-%s state", controller->slot_name);	/* dumps some of the state we know about */	ohci_dump_status (controller);	if (verbose)		ep_print_int_eds (controller, "hcca");	dbg ("hcca frame #%04x", controller->hcca->frame_no);	ohci_dump_roothub (controller, 1);}#endif /* DEBUG *//*-------------------------------------------------------------------------* * Interface functions (URB) *-------------------------------------------------------------------------*//* get a transfer request */int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,		int transfer_len, struct devrequest *setup, int interval){	ohci_t *ohci;	ed_t * ed;	urb_priv_t *purb_priv;	int i, size = 0;	ohci = &gohci;	/* when controller's hung, permit only roothub cleanup attempts	 * such as powering down ports */	if (ohci->disabled) {		err("sohci_submit_job: EPIPE");		return -1;	}	/* every endpoint has a ed, locate and fill it */	if (!(ed = ep_add_ed (dev, pipe))) {		err("sohci_submit_job: ENOMEM");		return -1;	}	/* for the private part of the URB we need the number of TDs (size) */	switch (usb_pipetype (pipe)) {		case PIPE_BULK:	/* one TD for every 4096 Byte */			size = (transfer_len - 1) / 4096 + 1;			break;		case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */			size = (transfer_len == 0)? 2:						(transfer_len - 1) / 4096 + 3;			break;	}	if (size >= (N_URB_TD - 1)) {		err("need %d TDs, only have %d", size, N_URB_TD);		return -1;	}	purb_priv = &urb_priv;	purb_priv->pipe = pipe;	/* fill the private part of the URB */	purb_priv->length = size;	purb_priv->ed = ed;	purb_priv->actual_length = 0;	/* allocate the TDs */	/* note that td[0] was allocated in ep_add_ed */	for (i = 0; i < size; i++) {		purb_priv->td[i] = td_alloc (dev);		if (!purb_priv->td[i]) {			purb_priv->length = i;			urb_free_priv (purb_priv);			err("sohci_submit_job: ENOMEM");			return -1;		}	}	if (ed->state == ED_NEW || (ed->state & ED_DEL)) {		urb_free_priv (purb_priv);		err("sohci_submit_job: EINVAL");		return -1;	}	/* link the ed into a chain if is not already */	if (ed->state != ED_OPER)		ep_link (ohci, ed);	/* fill the TDs and link it to the ed */	td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);	return 0;}/*-------------------------------------------------------------------------*/#ifdef DEBUG/* tell us the current USB frame number */static int sohci_get_current_frame_number (struct usb_device *usb_dev){	ohci_t *ohci = &gohci;	return m16_swap (ohci->hcca->frame_no);}#endif/*-------------------------------------------------------------------------* * ED handling functions *-------------------------------------------------------------------------*//* link an ed into one of the HC chains */static int ep_link (ohci_t *ohci, ed_t *edi){	volatile ed_t *ed = edi;	ed->state = ED_OPER;	switch (ed->type) {	case PIPE_CONTROL:		ed->hwNextED = 0;		if (ohci->ed_controltail == NULL) {			writel (ed, &ohci->regs->ed_controlhead);		} else {			ohci->ed_controltail->hwNextED = m32_swap (ed);		}		ed->ed_prev = ohci->ed_controltail;		if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&			!ohci->ed_rm_list[1] && !ohci->sleeping) {			ohci->hc_control |= OHCI_CTRL_CLE;			writel (ohci->hc_control, &ohci->regs->control);		}		ohci->ed_controltail = edi;		break;	case PIPE_BULK:		ed->hwNextED = 0;		if (ohci->ed_bulktail == NULL) {			writel (ed, &ohci->regs->ed_bulkhead);		} else {			ohci->ed_bulktail->hwNextED = m32_swap (ed);		}		ed->ed_prev = ohci->ed_bulktail;		if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&			!ohci->ed_rm_list[1] && !ohci->sleeping) {			ohci->hc_control |= OHCI_CTRL_BLE;			writel (ohci->hc_control, &ohci->regs->control);		}		ohci->ed_bulktail = edi;		break;	}	return 0;}/*-------------------------------------------------------------------------*//* unlink an ed from one of the HC chains. * just the link to the ed is unlinked. * the link from the ed still points to another operational ed or 0 * so the HC can eventually finish the processing of the unlinked ed */static int ep_unlink (ohci_t *ohci, ed_t *ed){	ed->hwINFO |= m32_swap (OHCI_ED_SKIP);	switch (ed->type) {	case PIPE_CONTROL:		if (ed->ed_prev == NULL) {			if (!ed->hwNextED) {				ohci->hc_control &= ~OHCI_CTRL_CLE;				writel (ohci->hc_control, &ohci->regs->control);			}			writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);		} else {			ed->ed_prev->hwNextED = ed->hwNextED;		}		if (ohci->ed_controltail == ed) {			ohci->ed_controltail = ed->ed_prev;		} else {			((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;		}		break;	case PIPE_BULK: