/*
- * HCD driver for ADM5120 SoC
+ * ADM5120 HCD (Host Controller Driver) for USB
*
- * Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
+ * Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
+ *
+ * This file was derived from: drivers/usb/host/ohci-hcd.c
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ *
+ * [ Initialisation is based on Linus' ]
+ * [ uhci code and gregs ahcd fragments ]
+ * [ (C) Copyright 1999 Linus Torvalds ]
+ * [ (C) Copyright 1999 Gregory P. Smith]
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
*
- * Based on the ADMtek 2.4 driver
- * (C) Copyright 2003 Junius Chen <juniusc@admtek.com.tw>
- * Which again was based on the ohci and uhci drivers.
*/
#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
#include <linux/delay.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/timer.h>
#include <linux/list.h>
#include <linux/usb.h>
-#include <linux/platform_device.h>
+#include <linux/usb/otg.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/reboot.h>
+#include <linux/debugfs.h>
-#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
+#include <asm/unaligned.h>
#include <asm/byteorder.h>
-#include <asm/mach-adm5120/adm5120_info.h>
#include "../core/hcd.h"
+#include "../core/hub.h"
-MODULE_DESCRIPTION("ADM5120 USB Host Controller Driver");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
-
-#define PFX "adm5120-hcd: "
-
-#define ADMHCD_REG_CONTROL 0x00
-#define ADMHCD_SW_RESET 0x00000008 /* Reset */
-#define ADMHCD_DMAA 0x00000004 /* DMA arbitration control */
-#define ADMHCD_SW_INTREQ 0x00000002 /* request software int */
-#define ADMHCD_HOST_EN 0x00000001 /* Host enable */
-#define ADMHCD_REG_INTSTATUS 0x04
-#define ADMHCD_INT_ACT 0x80000000 /* Interrupt active */
-#define ADMHCD_INT_FATAL 0x40000000 /* Fatal interrupt */
-#define ADMHCD_INT_SW 0x20000000 /* software interrupt */
-#define ADMHCD_INT_TD 0x00100000 /* TD completed */
-#define ADMHCD_FNO 0x00000800 /* Frame number overaflow */
-#define ADMHCD_SO 0x00000400 /* Scheduling overrun */
-#define ADMHCD_INSMI 0x00000200 /* Root hub status change */
-#define ADMHCD_BABI 0x00000100 /* Babble detected, host mode */
-#define ADMHCD_RESI 0x00000020 /* Resume detected */
-#define ADMHCD_SOFI 0x00000010 /* SOF transmitted/received, host mode */
-#define ADMHCD_REG_INTENABLE 0x08
-#define ADMHCD_INT_EN 0x80000000 /* Interrupt enable */
-#define ADMHCD_INTMASK 0x00000001 /* Interrupt mask */
-#define ADMHCD_REG_HOSTCONTROL 0x10
-#define ADMHCD_DMA_EN 0x00000004 /* USB host DMA enable */
-#define ADMHCD_STATE_MASK 0x00000003
-#define ADMHCD_STATE_RST 0x00000000 /* bus state reset */
-#define ADMHCD_STATE_RES 0x00000001 /* bus state resume */
-#define ADMHCD_STATE_OP 0x00000002 /* bus state operational */
-#define ADMHCD_STATE_SUS 0x00000003 /* bus state suspended */
-#define ADMHCD_REG_FMINTERVAL 0x18
-#define ADMHCD_REG_FMNUMBER 0x1c
-#define ADMHCD_REG_LSTHRESH 0x70
-#define ADMHCD_REG_RHDESCR 0x74
-#define ADMHCD_CRWE 0x20000000 /* Clear wakeup enable */
-#define ADMHCD_DRWE 0x10000000 /* Device remote wakeup enable */
-#define ADMHCD_HW_OCIC 0x08000000 /* Over current indication change */
-#define ADMHCD_LPSC 0x04000000 /* Local power switch change */
-#define ADMHCD_OCI 0x02000000 /* Over current indication */
-#define ADMHCD_LPS 0x01000000 /* Local power switch/global power switch */
-#define ADMHCD_NOCP 0x00000800 /* No over current protect mode */
-#define ADMHCD_OPCM 0x00000400 /* Over current protect mode */
-#define ADMHCD_NPS 0x00000200 /* No Power Switch */
-#define ADMHCD_PSM 0x00000100 /* Power switch mode */
-#define ADMHCD_REG_PORTSTATUS0 0x78
-#define ADMHCD_CCS 0x00000001 /* current connect status */
-#define ADMHCD_PES 0x00000002 /* port enable status */
-#define ADMHCD_PSS 0x00000004 /* port suspend status */
-#define ADMHCD_POCI 0x00000008 /* port overcurrent indicator */
-#define ADMHCD_PRS 0x00000010 /* port reset status */
-#define ADMHCD_PPS 0x00000100 /* port power status */
-#define ADMHCD_LSDA 0x00000200 /* low speed device attached */
-#define ADMHCD_CSC 0x00010000 /* connect status change */
-#define ADMHCD_PESC 0x00020000 /* enable status change */
-#define ADMHCD_PSSC 0x00040000 /* suspend status change */
-#define ADMHCD_OCIC 0x00080000 /* overcurrent change*/
-#define ADMHCD_PRSC 0x00100000 /* reset status change */
-#define ADMHCD_REG_PORTSTATUS1 0x7c
-#define ADMHCD_REG_HOSTHEAD 0x80
-
-#define ADMHCD_NUMPORTS 1
-#define ADMHCD_DESC_ALIGN 16
-
-struct admhcd_ed {
- /* Don't change first four, they used for DMA */
- u32 control;
- struct admhcd_td *tail;
- struct admhcd_td *head;
- struct admhcd_ed *next;
- /* the rest is for the driver only: */
- struct admhcd_td *cur;
- struct usb_host_endpoint *ep;
- struct urb *urb;
- struct admhcd_ed *real;
-} __attribute__ ((packed));
-
-#define ADMHCD_ED_EPSHIFT 7 /* Shift for endpoint number */
-#define ADMHCD_ED_INT 0x00000800 /* Is this an int endpoint */
-#define ADMHCD_ED_SPEED 0x00002000 /* Is it a high speed dev? */
-#define ADMHCD_ED_SKIP 0x00004000 /* Skip this ED */
-#define ADMHCD_ED_FORMAT 0x00008000 /* Is this an isoc endpoint */
-#define ADMHCD_ED_MAXSHIFT 16 /* Shift for max packet size */
-
-struct admhcd_td {
- /* Don't change first four, they are used for DMA */
- u32 control;
- u32 buffer;
- u32 buflen;
- struct admhcd_td *next;
- /* the rest is for the driver only: */
- struct urb *urb;
- struct admhcd_td *real;
-} __attribute__ ((packed));
-
-#define ADMHCD_TD_OWN 0x80000000
-#define ADMHCD_TD_TOGGLE 0x00000000
-#define ADMHCD_TD_DATA0 0x01000000
-#define ADMHCD_TD_DATA1 0x01800000
-#define ADMHCD_TD_OUT 0x00200000
-#define ADMHCD_TD_IN 0x00400000
-#define ADMHCD_TD_SETUP 0x00000000
-#define ADMHCD_TD_ISO 0x00010000
-#define ADMHCD_TD_R 0x00040000
-#define ADMHCD_TD_INTEN 0x00010000
-
-static int admhcd_td_err[16] = {
- 0, /* No */
- -EREMOTEIO, /* CRC */
- -EREMOTEIO, /* bit stuff */
- -EREMOTEIO, /* data toggle */
- -EPIPE, /* stall */
- -ETIMEDOUT, /* timeout */
- -EPROTO, /* pid err */
- -EPROTO, /* unexpected pid */
- -EREMOTEIO, /* data overrun */
- -EREMOTEIO, /* data underrun */
- -ETIMEDOUT, /* 1010 */
- -ETIMEDOUT, /* 1011 */
- -EREMOTEIO, /* buffer overrun */
- -EREMOTEIO, /* buffer underrun */
- -ETIMEDOUT, /* 1110 */
- -ETIMEDOUT, /* 1111 */
-};
-
-#define ADMHCD_TD_ERRMASK 0x38000000
-#define ADMHCD_TD_ERRSHIFT 27
-
-#define TD(td) ((struct admhcd_td *)(((u32)(td)) & ~(ADMHCD_DESC_ALIGN-1)))
-#define ED(ed) ((struct admhcd_ed *)(((u32)(ed)) & ~(ADMHCD_DESC_ALIGN-1)))
-
-struct admhcd {
- spinlock_t lock;
-
- /* Root hub registers */
- u32 rhdesca;
- u32 rhdescb;
- u32 rhstatus;
- u32 rhport[2];
-
- /* async schedule: control, bulk */
- struct list_head async;
- u32 base;
- u32 dma_en;
- unsigned long flags;
-};
-
-static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd)
-{
- return (struct admhcd *)(hcd->hcd_priv);
-}
-
-static inline struct usb_hcd *admhcd_to_hcd(struct admhcd *admhcd)
-{
- return container_of((void *)admhcd, struct usb_hcd, hcd_priv);
-}
+#define DRIVER_VERSION "0.25.0"
+#define DRIVER_AUTHOR "Gabor Juhos <juhosg at openwrt.org>"
+#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver"
-static char hcd_name[] = "adm5120-hcd";
+/*-------------------------------------------------------------------------*/
-static u32 admhcd_reg_get(struct admhcd *ahcd, int reg)
-{
- return *(volatile u32 *)KSEG1ADDR(ahcd->base+reg);
-}
+#undef ADMHC_VERBOSE_DEBUG /* not always helpful */
-static void admhcd_reg_set(struct admhcd *ahcd, int reg, u32 val)
-{
- *(volatile u32 *)KSEG1ADDR(ahcd->base+reg) = val;
-}
-
-static void admhcd_lock(struct admhcd *ahcd)
-{
- spin_lock_irqsave(&ahcd->lock, ahcd->flags);
- ahcd->dma_en = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) &
- ADMHCD_DMA_EN;
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
-}
+/* For initializing controller (mask in an HCFS mode too) */
+#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
-static void admhcd_unlock(struct admhcd *ahcd)
-{
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL,
- ADMHCD_STATE_OP | ahcd->dma_en);
- spin_unlock_irqrestore(&ahcd->lock, ahcd->flags);
-}
+#define ADMHC_INTR_INIT \
+ ( ADMHC_INTR_MIE | ADMHC_INTR_INSM | ADMHC_INTR_FATI \
+ | ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI )
-static struct admhcd_td *admhcd_td_alloc(struct admhcd_ed *ed, struct urb *urb)
-{
- struct admhcd_td *tdn, *td;
-
- tdn = kzalloc(sizeof(*tdn)+ADMHCD_DESC_ALIGN, GFP_ATOMIC);
- if (!tdn)
- return NULL;
-
- tdn->real = tdn;
- tdn = TD(KSEG1ADDR(tdn));
- if (ed->cur == NULL) {
- ed->cur = tdn;
- ed->head = tdn;
- ed->tail = tdn;
- td = tdn;
- } else {
- /* Supply back the old tail and link in new td as tail */
- td = TD(ed->tail);
- TD(ed->tail)->next = tdn;
- ed->tail = tdn;
- }
- td->urb = urb;
+/*-------------------------------------------------------------------------*/
- return td;
-}
+static const char hcd_name [] = "admhc-hcd";
-static void admhcd_td_free(struct admhcd_ed *ed, struct urb *urb)
-{
- struct admhcd_td *td, **tdp;
-
- if (urb == NULL)
- ed->control |= ADMHCD_ED_SKIP;
- tdp = &ed->cur;
- td = ed->cur;
- do {
- if (td->urb == urb)
- break;
- tdp = &td->next;
- td = TD(td->next);
- } while (td);
- while (td && td->urb == urb) {
- *tdp = TD(td->next);
- kfree(td->real);
- td = *tdp;
- }
-}
+#define STATECHANGE_DELAY msecs_to_jiffies(300)
-/* Find an endpoint's descriptor, if needed allocate a new one and link it
- in the DMA chain
- */
-static struct admhcd_ed *admhcd_get_ed(struct admhcd *ahcd,
- struct usb_host_endpoint *ep, struct urb *urb)
-{
- struct admhcd_ed *hosthead;
- struct admhcd_ed *found = NULL, *ed = NULL;
- unsigned int pipe = urb->pipe;
-
- admhcd_lock(ahcd);
- hosthead = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
- if (hosthead) {
- for (ed = hosthead;; ed = ED(ed->next)) {
- if (ed->ep == ep) {
- found = ed;
- break;
- }
- if (ED(ed->next) == hosthead)
- break;
- }
- }
- if (!found) {
- found = kzalloc(sizeof(*found)+ADMHCD_DESC_ALIGN, GFP_ATOMIC);
- if (!found)
- goto out;
- found->real = found;
- found->ep = ep;
- found = ED(KSEG1ADDR(found));
- found->control = usb_pipedevice(pipe) |
- (usb_pipeendpoint(pipe) << ADMHCD_ED_EPSHIFT) |
- (usb_pipeint(pipe) ? ADMHCD_ED_INT : 0) |
- (urb->dev->speed == USB_SPEED_FULL ? ADMHCD_ED_SPEED : 0) |
- (usb_pipeisoc(pipe) ? ADMHCD_ED_FORMAT : 0) |
- (usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)) << ADMHCD_ED_MAXSHIFT);
- /* Alloc first dummy td */
- admhcd_td_alloc(found, NULL);
- if (hosthead) {
- found->next = hosthead;
- ed->next = found;
- } else {
- found->next = found;
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)found);
- }
- }
-out:
- admhcd_unlock(ahcd);
- return found;
-}
+#include "adm5120.h"
-static struct admhcd_td *admhcd_td_fill(u32 control, struct admhcd_td *td,
- dma_addr_t data, int len)
-{
- td->buffer = data;
- td->buflen = len;
- td->control = control;
- return TD(td->next);
-}
+static void admhc_dump(struct admhcd *ahcd, int verbose);
+static int admhc_init(struct admhcd *ahcd);
+static void admhc_stop(struct usb_hcd *hcd);
-static void admhcd_ed_start(struct admhcd *ahcd, struct admhcd_ed *ed)
-{
- struct admhcd_td *td = ed->cur;
+#include "adm5120-dbg.c"
+#include "adm5120-mem.c"
+#include "adm5120-pm.c"
+#include "adm5120-hub.c"
+#include "adm5120-q.c"
- if (ed->urb)
- return;
- if (td->urb) {
- ed->urb = td->urb;
- while (1) {
- td->control |= ADMHCD_TD_OWN;
- if (TD(td->next)->urb != td->urb) {
- td->buflen |= ADMHCD_TD_INTEN;
- break;
- }
- td = TD(td->next);
- }
- }
- ed->head = TD(ed->head);
- ahcd->dma_en |= ADMHCD_DMA_EN;
-}
+/*-------------------------------------------------------------------------*/
-static irqreturn_t admhcd_irq(struct usb_hcd *hcd)
+/*
+ * queue up an urb for anything except the root hub
+ */
+static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags)
{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- u32 intstatus;
-
- intstatus = admhcd_reg_get(ahcd, ADMHCD_REG_INTSTATUS);
- if (intstatus & ADMHCD_INT_FATAL) {
- admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_FATAL);
- /* FIXME: handle fatal interrupts */
- }
-
- if (intstatus & ADMHCD_INT_SW) {
- admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_SW);
- /* FIXME: handle software interrupts */
- }
-
- if (intstatus & ADMHCD_INT_TD) {
- struct admhcd_ed *ed, *head;
-
- admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_TD);
-
- head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
- ed = head;
- if (ed) do {
- /* Is it a finished TD? */
- if (ed->urb && !(ed->cur->control & ADMHCD_TD_OWN)) {
- struct admhcd_td *td;
- int error;
-
- td = ed->cur;
- error = (td->control & ADMHCD_TD_ERRMASK) >>
- ADMHCD_TD_ERRSHIFT;
- ed->urb->status = admhcd_td_err[error];
- admhcd_td_free(ed, ed->urb);
- // Calculate real length!!!
- ed->urb->actual_length = ed->urb->transfer_buffer_length;
- ed->urb->hcpriv = NULL;
- usb_hcd_giveback_urb(hcd, ed->urb);
- ed->urb = NULL;
- }
- admhcd_ed_start(ahcd, ed);
- ed = ED(ed->next);
- } while (ed != head);
- }
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ struct ed *ed;
+ struct urb_priv *urb_priv;
+ unsigned int pipe = urb->pipe;
+ int td_cnt = 0;
+ unsigned long flags;
+ int ret = 0;
- return IRQ_HANDLED;
-}
+#ifdef ADMHC_VERBOSE_DEBUG
+ spin_lock_irqsave(&ahcd->lock, flags);
+ urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS);
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+#endif
-static int admhcd_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *ep,
- struct urb *urb, gfp_t mem_flags)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- struct admhcd_ed *ed;
- struct admhcd_td *td;
- int size = 0, i, zero = 0, ret = 0;
- unsigned int pipe = urb->pipe, toggle = 0;
- dma_addr_t data = (dma_addr_t)urb->transfer_buffer;
- int data_len = urb->transfer_buffer_length;
-
- ed = admhcd_get_ed(ahcd, ep, urb);
+ /* every endpoint has an ed, locate and maybe (re)initialize it */
+ ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval);
if (!ed)
return -ENOMEM;
- switch(usb_pipetype(pipe)) {
+ /* for the private part of the URB we need the number of TDs */
+ switch (ed->type) {
case PIPE_CONTROL:
- size = 2;
- case PIPE_INTERRUPT:
+ if (urb->transfer_buffer_length > TD_DATALEN_MAX)
+ /* td_submit_urb() doesn't yet handle these */
+ return -EMSGSIZE;
+
+ /* 1 TD for setup, 1 for ACK, plus ... */
+ td_cnt = 2;
+ /* FALLTHROUGH */
case PIPE_BULK:
- default:
- size += urb->transfer_buffer_length / 4096;
- if (urb->transfer_buffer_length % 4096)
- size++;
- if (size == 0)
- size++;
- else if (urb->transfer_flags & URB_ZERO_PACKET &&
- !(urb->transfer_buffer_length %
- usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)))) {
- size++;
- zero = 1;
- }
+ /* one TD for every 4096 Bytes (can be upto 8K) */
+ td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX;
+ /* ... and for any remaining bytes ... */
+ if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0)
+ td_cnt++;
+ /* ... and maybe a zero length packet to wrap it up */
+ if (td_cnt == 0)
+ td_cnt++;
+ else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
+ && (urb->transfer_buffer_length
+ % usb_maxpacket(urb->dev, pipe,
+ usb_pipeout (pipe))) == 0)
+ td_cnt++;
+ break;
+ case PIPE_INTERRUPT:
+ /*
+ * for Interrupt IN/OUT transactions, each ED contains
+ * only 1 TD.
+ * TODO: check transfer_buffer_length?
+ */
+ td_cnt = 1;
break;
case PIPE_ISOCHRONOUS:
- size = urb->number_of_packets;
+ /* number of packets from URB */
+ td_cnt = urb->number_of_packets;
break;
}
- admhcd_lock(ahcd);
- /* Remember the first td */
- td = admhcd_td_alloc(ed, urb);
- if (!td) {
- ret = -ENOMEM;
- goto out;
- }
- /* Allocate additionall tds first */
- for (i = 1; i < size; i++) {
- if (admhcd_td_alloc(ed, urb) == NULL) {
- admhcd_td_free(ed, urb);
- ret = -ENOMEM;
- goto out;
- }
- }
+ urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags);
+ if (!urb_priv)
+ return -ENOMEM;
- if (usb_gettoggle(urb->dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
- toggle = ADMHCD_TD_TOGGLE;
- else {
- toggle = ADMHCD_TD_DATA0;
- usb_settoggle(urb->dev, usb_pipeendpoint(pipe),
- usb_pipeout(pipe), 1);
+ urb_priv->ed = ed;
+
+ spin_lock_irqsave(&ahcd->lock, flags);
+ /* don't submit to a dead HC */
+ if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+ ret = -ENODEV;
+ goto fail;
+ }
+ if (!HC_IS_RUNNING(hcd->state)) {
+ ret = -ENODEV;
+ goto fail;
}
- switch(usb_pipetype(pipe)) {
- case PIPE_CONTROL:
- td = admhcd_td_fill(ADMHCD_TD_SETUP | ADMHCD_TD_DATA0,
- td, (dma_addr_t)urb->setup_packet, 8);
- while (data_len > 0) {
- td = admhcd_td_fill(ADMHCD_TD_DATA1
- | ADMHCD_TD_R |
- (usb_pipeout(pipe) ?
- ADMHCD_TD_OUT : ADMHCD_TD_IN), td,
- data, data_len % 4097);
- data_len -= 4096;
- }
- admhcd_td_fill(ADMHCD_TD_DATA1 | (usb_pipeout(pipe) ?
- ADMHCD_TD_IN : ADMHCD_TD_OUT), td,
- data, 0);
- break;
- case PIPE_INTERRUPT:
- case PIPE_BULK:
- //info ok for interrupt?
- i = 0;
- while(data_len > 4096) {
- td = admhcd_td_fill((usb_pipeout(pipe) ?
- ADMHCD_TD_OUT :
- ADMHCD_TD_IN | ADMHCD_TD_R) |
- (i ? ADMHCD_TD_TOGGLE : toggle), td,
- data, 4096);
- data += 4096;
- data_len -= 4096;
- i++;
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
+ goto fail;
+
+ /* schedule the ed if needed */
+ if (ed->state == ED_IDLE) {
+ ret = ed_schedule(ahcd, ed);
+ if (ret < 0) {
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ goto fail;
}
- td = admhcd_td_fill((usb_pipeout(pipe) ?
- ADMHCD_TD_OUT : ADMHCD_TD_IN) |
- (i ? ADMHCD_TD_TOGGLE : toggle), td, data, data_len);
- i++;
- if (zero)
- admhcd_td_fill((usb_pipeout(pipe) ?
- ADMHCD_TD_OUT : ADMHCD_TD_IN) |
- (i ? ADMHCD_TD_TOGGLE : toggle), td, 0, 0);
- break;
- case PIPE_ISOCHRONOUS:
- for (i = 0; i < urb->number_of_packets; i++) {
- td = admhcd_td_fill(ADMHCD_TD_ISO |
- ((urb->start_frame + i) & 0xffff), td,
- data + urb->iso_frame_desc[i].offset,
- urb->iso_frame_desc[i].length);
+ if (ed->type == PIPE_ISOCHRONOUS) {
+ u16 frame = admhc_frame_no(ahcd);
+
+ /* delay a few frames before the first TD */
+ frame += max_t (u16, 8, ed->interval);
+ frame &= ~(ed->interval - 1);
+ frame |= ed->branch;
+ urb->start_frame = frame;
+
+ /* yes, only URB_ISO_ASAP is supported, and
+ * urb->start_frame is never used as input.
+ */
}
- break;
- }
- urb->hcpriv = ed;
- admhcd_ed_start(ahcd, ed);
-out:
- admhcd_unlock(ahcd);
+ } else if (ed->type == PIPE_ISOCHRONOUS)
+ urb->start_frame = ed->last_iso + ed->interval;
+
+ /* fill the TDs and link them to the ed; and
+ * enable that part of the schedule, if needed
+ * and update count of queued periodic urbs
+ */
+ urb->hcpriv = urb_priv;
+ td_submit_urb(ahcd, urb);
+
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1);
+#endif
+
+fail:
+ if (ret)
+ urb_priv_free(ahcd, urb_priv);
+
+ spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
-static int admhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+/*
+ * decouple the URB from the HC queues (TDs, urb_priv);
+ * reporting is always done
+ * asynchronously, and we might be dealing with an urb that's
+ * partially transferred, or an ED with other urbs being unlinked.
+ */
+static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+ int status)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
- struct admhcd_ed *ed;
+ unsigned long flags;
+ int ret;
- admhcd_lock(ahcd);
+ spin_lock_irqsave(&ahcd->lock, flags);
- ed = urb->hcpriv;
- if (ed && ed->urb != urb)
- admhcd_td_free(ed, urb);
+#ifdef ADMHC_VERBOSE_DEBUG
+ urb_print(ahcd, urb, "DEQUEUE", 1, status);
+#endif
+ ret = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (ret) {
+ /* Do nothing */
+ ;
+ } else if (HC_IS_RUNNING(hcd->state)) {
+ struct urb_priv *urb_priv;
+
+ /* Unless an IRQ completed the unlink while it was being
+ * handed to us, flag it for unlink and giveback, and force
+ * some upcoming INTR_SF to call finish_unlinks()
+ */
+ urb_priv = urb->hcpriv;
+ if (urb_priv) {
+ if (urb_priv->ed->state == ED_OPER)
+ start_ed_unlink(ahcd, urb_priv->ed);
+ }
+ } else {
+ /*
+ * with HC dead, we won't respect hc queue pointers
+ * any more ... just clean up every urb's memory.
+ */
+ if (urb->hcpriv)
+ finish_urb(ahcd, urb, status);
+ }
+ spin_unlock_irqrestore(&ahcd->lock, flags);
- admhcd_unlock(ahcd);
- return 0;
+ return ret;
}
-static void admhcd_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+/*-------------------------------------------------------------------------*/
+
+/* frees config/altsetting state for endpoints,
+ * including ED memory, dummy TD, and bulk/intr data toggle
+ */
+
+static void admhc_endpoint_disable(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- struct admhcd_ed *ed, *edt, *head;
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ unsigned long flags;
+ struct ed *ed = ep->hcpriv;
+ unsigned limit = 1000;
- admhcd_lock(ahcd);
+ /* ASSERT: any requests/urbs are being unlinked */
+ /* ASSERT: nobody can be submitting urbs for this any more */
- head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
- if (!head)
- goto out;
- for (ed = head; ED(ed->next) != head; ed = ED(ed->next))
- if (ed->ep == ep)
+ if (!ed)
+ return;
+
+#ifdef ADMHC_VERBOSE_DEBUG
+ spin_lock_irqsave(&ahcd->lock, flags);
+ admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1);
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+#endif
+
+rescan:
+ spin_lock_irqsave(&ahcd->lock, flags);
+
+ if (!HC_IS_RUNNING(hcd->state)) {
+sanitize:
+ ed->state = ED_IDLE;
+ finish_unlinks(ahcd, 0);
+ }
+
+ switch (ed->state) {
+ case ED_UNLINK: /* wait for hw to finish? */
+ /* major IRQ delivery trouble loses INTR_SOFI too... */
+ if (limit-- == 0) {
+ admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n");
+ goto sanitize;
+ }
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+ schedule_timeout_uninterruptible(1);
+ goto rescan;
+ case ED_IDLE: /* fully unlinked */
+ if (list_empty(&ed->td_list)) {
+ td_free (ahcd, ed->dummy);
+ ed_free (ahcd, ed);
break;
- if (ed->ep != ep)
- goto out;
- while (ed->cur)
- admhcd_td_free(ed, ed->cur->urb);
- if (head == ed) {
- if (ED(ed->next) == ed) {
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0);
- ahcd->dma_en = 0;
- goto out_free;
}
- head = ED(ed->next);
- for (edt = head; ED(edt->next) != head; edt = ED(edt->next));
- edt->next = ED(ed->next);
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)ed->next);
- goto out_free;
+ /* else FALL THROUGH */
+ default:
+ /* caller was supposed to have unlinked any requests;
+ * that's not our job. can't recover; must leak ed.
+ */
+ admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n",
+ ed, ep->desc.bEndpointAddress, ed->state,
+ list_empty(&ed->td_list) ? "" : " (has tds)");
+ td_free(ahcd, ed->dummy);
+ break;
}
- for (edt = head; edt->next != ed; edt = edt->next);
- edt->next = ed->next;
-out_free:
- kfree(ed->real);
-out:
- admhcd_unlock(ahcd);
+ ep->hcpriv = NULL;
+
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+ return;
}
-static int admhcd_get_frame_number(struct usb_hcd *hcd)
+static int admhc_get_frame_number(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
- return admhcd_reg_get(ahcd, ADMHCD_REG_FMNUMBER) & 0x0000ffff;
+ return admhc_frame_no(ahcd);
}
-static int admhcd_hub_status_data(struct usb_hcd *hcd, char *buf)
+static void admhc_usb_reset(struct admhcd *ahcd)
{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int port;
-
- *buf = 0;
- for (port = 0; port < ADMHCD_NUMPORTS; port++) {
- if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4) &
- (ADMHCD_CSC | ADMHCD_PESC | ADMHCD_PSSC | ADMHCD_OCIC |
- ADMHCD_PRSC))
- *buf |= (1 << (port + 1));
- }
- return !!*buf;
+#if 0
+ ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
+ ahcd->hc_control &= OHCI_CTRL_RWC;
+ admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control);
+#else
+ /* FIXME */
+ ahcd->host_control = ADMHC_BUSS_RESET;
+ admhc_writel(ahcd, ahcd->host_control ,&ahcd->regs->host_control);
+#endif
}
-static __u8 root_hub_hub_des[] = {
- 0x09, /* __u8 bLength; */
- 0x29, /* __u8 bDescriptorType; Hub-descriptor */
- 0x02, /* __u8 bNbrPorts; */
- 0x0a, 0x00, /* __u16 wHubCharacteristics; */
- 0x01, /* __u8 bPwrOn2pwrGood; 2ms */
- 0x00, /* __u8 bHubContrCurrent; 0mA */
- 0x00, /* __u8 DeviceRemovable; */
- 0xff, /* __u8 PortPwrCtrlMask; */
-};
-
-static int admhcd_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
- u16 wIndex, char *buf, u16 wLength)
+/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and
+ * other cases where the next software may expect clean state from the
+ * "firmware". this is bus-neutral, unlike shutdown() methods.
+ */
+static void
+admhc_shutdown(struct usb_hcd *hcd)
{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- int retval = 0, len;
- unsigned int port = wIndex -1;
+ struct admhcd *ahcd;
- switch (typeReq) {
+ ahcd = hcd_to_admhcd(hcd);
+ admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
+ admhc_dma_disable(ahcd);
+ admhc_usb_reset(ahcd);
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
+}
- case GetHubStatus:
- *(__le32 *)buf = cpu_to_le32(0);
- break;
- case GetPortStatus:
- if (port >= ADMHCD_NUMPORTS)
- goto err;
- *(__le32 *)buf = cpu_to_le32(
- admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4));
- break;
- case SetHubFeature: /* We don't implement these */
- case ClearHubFeature:
- switch (wValue) {
- case C_HUB_OVER_CURRENT:
- case C_HUB_LOCAL_POWER:
- break;
- default:
- goto err;
- }
- case SetPortFeature:
- if (port >= ADMHCD_NUMPORTS)
- goto err;
-
- switch (wValue) {
- case USB_PORT_FEAT_SUSPEND:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PSS);
- break;
- case USB_PORT_FEAT_RESET:
- if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4)
- & ADMHCD_CCS) {
- admhcd_reg_set(ahcd,
- ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PRS | ADMHCD_CSC);
- mdelay(50);
- admhcd_reg_set(ahcd,
- ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PES | ADMHCD_CSC);
- }
- break;
- case USB_PORT_FEAT_POWER:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PPS);
- break;
- default:
- goto err;
- }
- break;
- case ClearPortFeature:
- if (port >= ADMHCD_NUMPORTS)
- goto err;
-
- switch (wValue) {
- case USB_PORT_FEAT_ENABLE:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_CCS);
- break;
- case USB_PORT_FEAT_C_ENABLE:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PESC);
- break;
- case USB_PORT_FEAT_SUSPEND:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_POCI);
- break;
- case USB_PORT_FEAT_C_SUSPEND:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PSSC);
- case USB_PORT_FEAT_POWER:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_LSDA);
- break;
- case USB_PORT_FEAT_C_CONNECTION:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_CSC);
- break;
- case USB_PORT_FEAT_C_OVER_CURRENT:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_OCIC);
- break;
- case USB_PORT_FEAT_C_RESET:
- admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
- ADMHCD_PRSC);
- break;
- default:
- goto err;
- }
- break;
- case GetHubDescriptor:
- len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
- memcpy(buf, root_hub_hub_des, len);
- break;
- default:
-err:
- retval = -EPIPE;
+/*-------------------------------------------------------------------------*
+ * HC functions
+ *-------------------------------------------------------------------------*/
+
+static void admhc_eds_cleanup(struct admhcd *ahcd)
+{
+ if (ahcd->ed_tails[PIPE_INTERRUPT]) {
+ ed_free(ahcd, ahcd->ed_tails[PIPE_INTERRUPT]);
+ ahcd->ed_tails[PIPE_INTERRUPT] = NULL;
}
- return retval;
-}
+ if (ahcd->ed_tails[PIPE_ISOCHRONOUS]) {
+ ed_free(ahcd, ahcd->ed_tails[PIPE_ISOCHRONOUS]);
+ ahcd->ed_tails[PIPE_ISOCHRONOUS] = NULL;
+ }
-static int admhcd_start(struct usb_hcd *hcd)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- unsigned long flags;
+ if (ahcd->ed_tails[PIPE_CONTROL]) {
+ ed_free(ahcd, ahcd->ed_tails[PIPE_CONTROL]);
+ ahcd->ed_tails[PIPE_CONTROL] = NULL;
+ }
- spin_lock_irqsave(&ahcd->lock, flags);
+ if (ahcd->ed_tails[PIPE_BULK]) {
+ ed_free(ahcd, ahcd->ed_tails[PIPE_BULK]);
+ ahcd->ed_tails[PIPE_BULK] = NULL;
+ }
- /* Initialise the HCD registers */
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
- mdelay(10);
+ ahcd->ed_head = NULL;
+}
- admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
+#define ED_DUMMY_INFO (ED_SPEED_FULL | ED_SKIP)
- while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET) {
- printk(KERN_WARNING PFX "waiting for reset to complete\n");
- mdelay(1);
- }
+static int admhc_eds_init(struct admhcd *ahcd)
+{
+ struct ed *ed;
- //hcd->uses_new_polling = 1;
+ ed = ed_create(ahcd, PIPE_INTERRUPT, ED_DUMMY_INFO);
+ if (!ed)
+ goto err;
- /* Enable USB host mode */
- admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
+ ahcd->ed_tails[PIPE_INTERRUPT] = ed;
- /* Set host specific settings */
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000);
- admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf);
- admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628);
+ ed = ed_create(ahcd, PIPE_ISOCHRONOUS, ED_DUMMY_INFO);
+ if (!ed)
+ goto err;
- /* Set interrupts */
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, ADMHCD_INT_ACT |
- ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
- admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_ACT |
- ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
+ ahcd->ed_tails[PIPE_ISOCHRONOUS] = ed;
+ ed->ed_prev = ahcd->ed_tails[PIPE_INTERRUPT];
+ ahcd->ed_tails[PIPE_INTERRUPT]->ed_next = ed;
+ ahcd->ed_tails[PIPE_INTERRUPT]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
- /* Power on all ports */
- admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
+ ed = ed_create(ahcd, PIPE_CONTROL, ED_DUMMY_INFO);
+ if (!ed)
+ goto err;
- /* HCD is now operationnal */
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
+ ahcd->ed_tails[PIPE_CONTROL] = ed;
+ ed->ed_prev = ahcd->ed_tails[PIPE_ISOCHRONOUS];
+ ahcd->ed_tails[PIPE_ISOCHRONOUS]->ed_next = ed;
+ ahcd->ed_tails[PIPE_ISOCHRONOUS]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
- hcd->state = HC_STATE_RUNNING;
+ ed = ed_create(ahcd, PIPE_BULK, ED_DUMMY_INFO);
+ if (!ed)
+ goto err;
- spin_unlock_irqrestore(&ahcd->lock, flags);
+ ahcd->ed_tails[PIPE_BULK] = ed;
+ ed->ed_prev = ahcd->ed_tails[PIPE_CONTROL];
+ ahcd->ed_tails[PIPE_CONTROL]->ed_next = ed;
+ ahcd->ed_tails[PIPE_CONTROL]->hwNextED = cpu_to_hc32(ahcd, ed->dma);
+
+ ahcd->ed_head = ahcd->ed_tails[PIPE_INTERRUPT];
+
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "ed intr", ahcd->ed_tails[PIPE_INTERRUPT], 1);
+ admhc_dump_ed(ahcd, "ed isoc", ahcd->ed_tails[PIPE_ISOCHRONOUS], 1);
+ admhc_dump_ed(ahcd, "ed ctrl", ahcd->ed_tails[PIPE_CONTROL], 1);
+ admhc_dump_ed(ahcd, "ed bulk", ahcd->ed_tails[PIPE_BULK], 1);
+#endif
return 0;
+
+err:
+ admhc_eds_cleanup(ahcd);
+ return -ENOMEM;
}
-static int admhcd_sw_reset(struct admhcd *ahcd)
+/* init memory, and kick BIOS/SMM off */
+
+static int admhc_init(struct admhcd *ahcd)
{
- int retries = 15;
- unsigned long flags;
- int ret = 0;
+ struct usb_hcd *hcd = admhcd_to_hcd(ahcd);
+ int ret;
- spin_lock_irqsave(&ahcd->lock, flags);
+ admhc_disable(ahcd);
+ ahcd->regs = hcd->regs;
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
- mdelay(10);
+ /* Disable HC interrupts */
+ admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
- admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
+ /* Read the number of ports unless overridden */
+ if (ahcd->num_ports == 0)
+ ahcd->num_ports = admhc_read_rhdesc(ahcd) & ADMHC_RH_NUMP;
- while (--retries) {
- mdelay(1);
- if (!(admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET))
- break;
- }
- if (!retries) {
- printk(KERN_WARNING "%s: software reset timeout\n", hcd_name);
- ret = -ETIME;
- }
- spin_unlock_irqrestore(&ahcd->lock, flags);
+ ret = admhc_mem_init(ahcd);
+ if (ret)
+ goto err;
+
+ /* init dummy endpoints */
+ ret = admhc_eds_init(ahcd);
+ if (ret)
+ goto err;
+
+ create_debug_files(ahcd);
+
+ return 0;
+
+err:
+ admhc_stop(hcd);
return ret;
}
-static int admhcd_reset(struct usb_hcd *hcd)
+/*-------------------------------------------------------------------------*/
+
+/* Start an OHCI controller, set the BUS operational
+ * resets USB and controller
+ * enable interrupts
+ */
+static int admhc_run(struct admhcd *ahcd)
{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- u32 state = 0;
- int ret, timeout = 15; /* ms */
- unsigned long t;
+ u32 temp;
+ int first = ahcd->fminterval == 0;
+ struct usb_hcd *hcd = admhcd_to_hcd(ahcd);
+
+ admhc_disable(ahcd);
+
+ /* boot firmware should have set this up (5.1.1.3.1) */
+ if (first) {
+ temp = admhc_readl(ahcd, &ahcd->regs->fminterval);
+ ahcd->fminterval = temp & ADMHC_SFI_FI_MASK;
+ if (ahcd->fminterval != FI)
+ admhc_dbg(ahcd, "fminterval delta %d\n",
+ ahcd->fminterval - FI);
+ ahcd->fminterval |=
+ (FSLDP(ahcd->fminterval) << ADMHC_SFI_FSLDP_SHIFT);
+ /* also: power/overcurrent flags in rhdesc */
+ }
- ret = admhcd_sw_reset(ahcd);
- if (ret)
- return ret;
-
- t = jiffies + msecs_to_jiffies(timeout);
- do {
- spin_lock_irq(&ahcd->lock);
- state = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL);
- spin_unlock_irq(&ahcd->lock);
- state &= ADMHCD_STATE_MASK;
- if (state == ADMHCD_STATE_RST)
- break;
- msleep(4);
- } while (time_before_eq(jiffies, t));
+#if 0 /* TODO: not applicable */
+ /* Reset USB nearly "by the book". RemoteWakeupConnected was
+ * saved if boot firmware (BIOS/SMM/...) told us it's connected,
+ * or if bus glue did the same (e.g. for PCI add-in cards with
+ * PCI PM support).
+ */
+ if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0
+ && !device_may_wakeup(hcd->self.controller))
+ device_init_wakeup(hcd->self.controller, 1);
+#endif
- if (state != ADMHCD_STATE_RST) {
- printk(KERN_WARNING "%s: device not ready after %dms\n",
- hcd_name, timeout);
- ret = -ENODEV;
+ switch (ahcd->host_control & ADMHC_HC_BUSS) {
+ case ADMHC_BUSS_OPER:
+ temp = 0;
+ break;
+ case ADMHC_BUSS_SUSPEND:
+ /* FALLTHROUGH ? */
+ case ADMHC_BUSS_RESUME:
+ ahcd->host_control = ADMHC_BUSS_RESUME;
+ temp = 10 /* msec wait */;
+ break;
+ /* case ADMHC_BUSS_RESET: */
+ default:
+ ahcd->host_control = ADMHC_BUSS_RESET;
+ temp = 50 /* msec wait */;
+ break;
}
+ admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
- return ret;
-}
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
-static void admhcd_stop(struct usb_hcd *hcd)
-{
- struct admhcd *ahcd = hcd_to_admhcd(hcd);
- unsigned long flags;
- u32 val;
+ msleep(temp);
+ temp = admhc_read_rhdesc(ahcd);
+ if (!(temp & ADMHC_RH_NPS)) {
+ /* power down each port */
+ for (temp = 0; temp < ahcd->num_ports; temp++)
+ admhc_write_portstatus(ahcd, temp, ADMHC_PS_CPP);
+ }
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
+
+ /* 2msec timelimit here means no irqs/preempt */
+ spin_lock_irq(&ahcd->lock);
+
+ admhc_writel(ahcd, ADMHC_CTRL_SR, &ahcd->regs->gencontrol);
+ temp = 30; /* ... allow extra time */
+ while ((admhc_readl(ahcd, &ahcd->regs->gencontrol) & ADMHC_CTRL_SR) != 0) {
+ if (--temp == 0) {
+ spin_unlock_irq(&ahcd->lock);
+ admhc_err(ahcd, "USB HC reset timed out!\n");
+ return -1;
+ }
+ udelay(1);
+ }
- spin_lock_irqsave(&ahcd->lock, flags);
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
+ /* enable HOST mode, before access any host specific register */
+ admhc_writel(ahcd, ADMHC_CTRL_UHFE, &ahcd->regs->gencontrol);
- /* Set global control of power for ports */
- val = admhcd_reg_get(ahcd, ADMHCD_REG_RHDESCR);
- val &= (~ADMHCD_PSM | ADMHCD_LPS);
- admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, val);
+ /* Tell the controller where the descriptor list is */
+ admhc_writel(ahcd, (u32)ahcd->ed_head->dma, &ahcd->regs->hosthead);
- spin_unlock_irqrestore(&ahcd->lock, flags);
+ periodic_reinit(ahcd);
- /* Ask for software reset */
- admhcd_sw_reset(ahcd);
-}
+ /* use rhsc irqs after khubd is fully initialized */
+ hcd->poll_rh = 1;
+ hcd->uses_new_polling = 1;
+#if 0
+ /* wake on ConnectStatusChange, matching external hubs */
+ admhc_writel(ahcd, RH_HS_DRWE, &ahcd->regs->roothub.status);
+#else
+ /* FIXME roothub_write_status (ahcd, ADMHC_RH_DRWE); */
+#endif
-static struct hc_driver adm5120_hc_driver = {
- .description = hcd_name,
- .product_desc = "ADM5120 HCD",
- .hcd_priv_size = sizeof(struct admhcd),
- .irq = admhcd_irq,
- .flags = HCD_USB11,
- .urb_enqueue = admhcd_urb_enqueue,
- .urb_dequeue = admhcd_urb_dequeue,
- .endpoint_disable = admhcd_endpoint_disable,
- .get_frame_number = admhcd_get_frame_number,
- .hub_status_data = admhcd_hub_status_data,
- .hub_control = admhcd_hub_control,
- .start = admhcd_start,
- .stop = admhcd_stop,
- .reset = admhcd_reset,
-};
-
-#define resource_len(r) (((r)->end - (r)->start) + 1)
-
-static int __init adm5120hcd_probe(struct platform_device *pdev)
-{
- struct usb_hcd *hcd;
- struct admhcd *ahcd;
- struct resource *data;
- void __iomem *data_reg;
+ /* Choose the interrupts we care about now, others later on demand */
+ admhc_intr_ack(ahcd, ~0);
+ admhc_intr_enable(ahcd, ADMHC_INTR_INIT);
+
+ admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc);
+
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
- int err = 0, irq;
+ /* start controller operations */
+ ahcd->host_control = ADMHC_BUSS_OPER;
+ admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
- if (pdev->num_resources < 2) {
- printk(KERN_WARNING PFX "not enough resources\n");
- err = -ENODEV;
- goto out;
+ temp = 20;
+ while ((admhc_readl(ahcd, &ahcd->regs->host_control)
+ & ADMHC_HC_BUSS) != ADMHC_BUSS_OPER) {
+ if (--temp == 0) {
+ spin_unlock_irq(&ahcd->lock);
+ admhc_err(ahcd, "unable to setup operational mode!\n");
+ return -1;
+ }
+ mdelay(1);
}
- irq = platform_get_irq(pdev, 0);
- data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->state = HC_STATE_RUNNING;
+
+ ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
+
+#if 0
+ /* FIXME: enabling DMA is always failed here for an unknown reason */
+ admhc_dma_enable(ahcd);
- if (pdev->dev.dma_mask) {
- printk(KERN_DEBUG PFX "no we won't dma\n");
- return -EINVAL;
+ temp = 200;
+ while ((admhc_readl(ahcd, &ahcd->regs->host_control)
+ & ADMHC_HC_DMAE) != ADMHC_HC_DMAE) {
+ if (--temp == 0) {
+ spin_unlock_irq(&ahcd->lock);
+ admhc_err(ahcd, "unable to enable DMA!\n");
+ admhc_dump(ahcd, 1);
+ return -1;
+ }
+ mdelay(1);
}
- if (!data || irq < 0) {
- printk(KERN_DEBUG PFX "either IRQ or data resource is invalid\n");
- err = -ENODEV;
- goto out;
+#endif
+
+ spin_unlock_irq(&ahcd->lock);
+
+ mdelay(ADMHC_POTPGT);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* an interrupt happens */
+
+static irqreturn_t admhc_irq(struct usb_hcd *hcd)
+{
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ struct admhcd_regs __iomem *regs = ahcd->regs;
+ u32 ints;
+
+ ints = admhc_readl(ahcd, ®s->int_status);
+ if ((ints & ADMHC_INTR_INTA) == 0) {
+ /* no unmasked interrupt status is set */
+ return IRQ_NONE;
}
- if (!request_mem_region(data->start, resource_len(data), hcd_name)) {
- printk(KERN_DEBUG PFX "cannot request memory regions for the data resource\n");
- err = -EBUSY;
- goto out;
+ ints &= admhc_readl(ahcd, ®s->int_enable);
+
+ if (ints & ADMHC_INTR_FATI) {
+ /* e.g. due to PCI Master/Target Abort */
+ admhc_disable(ahcd);
+ admhc_err(ahcd, "Fatal Error, controller disabled\n");
+ admhc_dump(ahcd, 1);
+ admhc_usb_reset(ahcd);
}
- data_reg = ioremap(data->start, resource_len(data));
- if (data_reg == NULL) {
- printk(KERN_DEBUG PFX "unable to ioremap\n");
- err = -ENOMEM;
- goto out_mem;
- }
-
- hcd = usb_create_hcd(&adm5120_hc_driver, &pdev->dev, pdev->dev.bus_id);
- if (!hcd) {
- printk(KERN_DEBUG PFX "unable to create the hcd\n");
- err = -ENOMEM;
- goto out_unmap;
+ if (ints & ADMHC_INTR_BABI) {
+ admhc_intr_disable(ahcd, ADMHC_INTR_BABI);
+ admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
+ admhc_err(ahcd, "Babble Detected\n");
}
- hcd->rsrc_start = data->start;
- hcd->rsrc_len = resource_len(data);
- hcd->regs = data_reg;
+ if (ints & ADMHC_INTR_INSM) {
+ admhc_vdbg(ahcd, "Root Hub Status Change\n");
+ ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
+ admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM);
+
+ /* NOTE: Vendors didn't always make the same implementation
+ * choices for RHSC. Many followed the spec; RHSC triggers
+ * on an edge, like setting and maybe clearing a port status
+ * change bit. With others it's level-triggered, active
+ * until khubd clears all the port status change bits. We'll
+ * always disable it here and rely on polling until khubd
+ * re-enables it.
+ */
+ admhc_intr_disable(ahcd, ADMHC_INTR_INSM);
+ usb_hcd_poll_rh_status(hcd);
+ } else if (ints & ADMHC_INTR_RESI) {
+ /* For connect and disconnect events, we expect the controller
+ * to turn on RHSC along with RD. But for remote wakeup events
+ * this might not happen.
+ */
+ admhc_vdbg(ahcd, "Resume Detect\n");
+ admhc_intr_ack(ahcd, ADMHC_INTR_RESI);
+ hcd->poll_rh = 1;
+ if (ahcd->autostop) {
+ spin_lock(&ahcd->lock);
+ admhc_rh_resume(ahcd);
+ spin_unlock(&ahcd->lock);
+ } else
+ usb_hcd_resume_root_hub(hcd);
+ }
- ahcd = hcd_to_admhcd(hcd);
- ahcd->base = (u32)data_reg;
+ if (ints & ADMHC_INTR_TDC) {
+ admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
+ admhc_intr_ack(ahcd, ADMHC_INTR_TDC);
+ if (HC_IS_RUNNING(hcd->state))
+ admhc_intr_disable(ahcd, ADMHC_INTR_TDC);
+ spin_lock(&ahcd->lock);
+ admhc_td_complete(ahcd);
+ spin_unlock(&ahcd->lock);
+ if (HC_IS_RUNNING(hcd->state))
+ admhc_intr_enable(ahcd, ADMHC_INTR_TDC);
+ }
- spin_lock_init(&ahcd->lock);
- INIT_LIST_HEAD(&ahcd->async);
+ if (ints & ADMHC_INTR_SO) {
+ /* could track INTR_SO to reduce available PCI/... bandwidth */
+ admhc_vdbg(ahcd, "Schedule Overrun\n");
+ }
- hcd->product_desc = "ADM5120 HCD";
+#if 1
+ spin_lock(&ahcd->lock);
+ if (ahcd->ed_rm_list)
+ finish_unlinks(ahcd, admhc_frame_no(ahcd));
- err = usb_add_hcd(hcd, irq, IRQF_DISABLED);
- if (err) {
- printk(KERN_DEBUG PFX "unable to add hcd\n");
- goto out_dev;
+ if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list
+ && HC_IS_RUNNING(hcd->state))
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+ spin_unlock(&ahcd->lock);
+#else
+ if (ints & ADMHC_INTR_SOFI) {
+ admhc_vdbg(ahcd, "Start Of Frame\n");
+ spin_lock(&ahcd->lock);
+
+ /* handle any pending ED removes */
+ finish_unlinks(ahcd, admhc_frameno(ahcd));
+
+ /* leaving INTR_SOFI enabled when there's still unlinking
+ * to be done in the (next frame).
+ */
+ if ((ahcd->ed_rm_list == NULL) ||
+ HC_IS_RUNNING(hcd->state) == 0)
+ /*
+ * disable INTR_SOFI if there are no unlinking to be
+ * done (in the next frame)
+ */
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+
+ spin_unlock(&ahcd->lock);
}
+#endif
- return 0;
+ if (HC_IS_RUNNING(hcd->state)) {
+ admhc_intr_ack(ahcd, ints);
+ admhc_intr_enable(ahcd, ADMHC_INTR_MIE);
+ admhc_writel_flush(ahcd);
+ }
-out_dev:
- usb_put_hcd(hcd);
-out_unmap:
- iounmap(data_reg);
-out_mem:
- release_mem_region(data->start, resource_len(data));
-out:
- return err;
+ return IRQ_HANDLED;
}
-#ifdef CONFIG_PM
-static int adm5120hcd_suspend(struct platform_device *pdev, pm_message_t state)
-{
- pdev->dev.power.power_state = state;
- mdelay(1);
- return 0;
-}
+/*-------------------------------------------------------------------------*/
-static int adm5120hcd_resume(struct platform_device *pdev, pm_message_t state)
+static void admhc_stop(struct usb_hcd *hcd)
{
- pdev->dev.power.power_state = PMSG_ON;
- mdelay(1);
- return 0;
-}
-#else
-#define adm5120hcd_suspend NULL
-#define adm5120hcd_resume NULL
-#endif
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
-static int __init_or_module adm5120hcd_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- struct admhcd *ahcd;
+ admhc_dump(ahcd, 1);
- if (!hcd)
- return 0;
- ahcd = hcd_to_admhcd(hcd);
- usb_remove_hcd(hcd);
+ flush_scheduled_work();
- usb_put_hcd(hcd);
- return 0;
+ admhc_usb_reset(ahcd);
+ admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
+
+ free_irq(hcd->irq, hcd);
+ hcd->irq = -1;
+
+ remove_debug_files(ahcd);
+ admhc_eds_cleanup(ahcd);
+ admhc_mem_cleanup(ahcd);
}
-static struct platform_driver adm5120hcd_driver = {
- .probe = adm5120hcd_probe,
- .remove = adm5120hcd_remove,
- .suspend = adm5120hcd_suspend,
- .remove = adm5120hcd_resume,
- .driver = {
- .name = (char *)hcd_name,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init adm5120hcd_init(void)
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_MIPS_ADM5120
+#include "adm5120-drv.c"
+#define PLATFORM_DRIVER usb_hcd_adm5120_driver
+#endif
+
+#if !defined(PLATFORM_DRIVER)
+#error "missing bus glue for admhc-hcd"
+#endif
+
+#define DRIVER_INFO DRIVER_DESC " version " DRIVER_VERSION
+
+static int __init admhc_hcd_mod_init(void)
{
- int ret;
+ int ret = 0;
- if (usb_disabled()) {
- printk(KERN_DEBUG PFX "USB support is disabled\n");
+ if (usb_disabled())
return -ENODEV;
- }
- if (mips_machgroup != MACH_GROUP_ADM5120) {
- printk(KERN_DEBUG PFX "unsupported machine group\n");
- return -ENODEV;
+ pr_info("%s: " DRIVER_INFO "\n", hcd_name);
+ pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
+ sizeof (struct ed), sizeof (struct td));
+
+#ifdef DEBUG
+ admhc_debug_root = debugfs_create_dir("admhc", NULL);
+ if (!admhc_debug_root) {
+ ret = -ENOENT;
+ goto error_debug;
}
+#endif
+
+#ifdef PLATFORM_DRIVER
+ ret = platform_driver_register(&PLATFORM_DRIVER);
+ if (ret < 0)
+ goto error_platform;
+#endif
+
+ return ret;
- ret = platform_driver_register(&adm5120hcd_driver);
- if (ret == 0)
- printk(KERN_INFO PFX "registered\n");
+#ifdef PLATFORM_DRIVER
+ platform_driver_unregister(&PLATFORM_DRIVER);
+error_platform:
+#endif
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+ admhc_debug_root = NULL;
+error_debug:
+#endif
return ret;
}
+module_init(admhc_hcd_mod_init);
-static void __exit adm5120hcd_exit(void)
+static void __exit admhc_hcd_mod_exit(void)
{
- platform_driver_unregister(&adm5120hcd_driver);
- printk(KERN_INFO PFX "driver unregistered\n");
+ platform_driver_unregister(&PLATFORM_DRIVER);
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+#endif
}
+module_exit(admhc_hcd_mod_exit);
-module_init(adm5120hcd_init);
-module_exit(adm5120hcd_exit);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_INFO);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
projects / openwrt.git / blobdiff