diff options
Diffstat (limited to 'drivers/usb/host/isp116x-hcd.c')
| -rw-r--r-- | drivers/usb/host/isp116x-hcd.c | 1875 |
1 files changed, 1875 insertions, 0 deletions
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c new file mode 100644 index 0000000..ff0a168 --- /dev/null +++ b/drivers/usb/host/isp116x-hcd.c @@ -0,0 +1,1875 @@ +/* + * ISP116x HCD (Host Controller Driver) for USB. + * + * Derived from the SL811 HCD, rewritten for ISP116x. + * Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee> + * + * Portions: + * Copyright (C) 2004 Psion Teklogix (for NetBook PRO) + * Copyright (C) 2004 David Brownell + * + * Periodic scheduling is based on Roman's OHCI code + * Copyright (C) 1999 Roman Weissgaerber + * + */ + +/* + * The driver basically works. A number of people have used it with a range + * of devices. + * + *The driver passes all usbtests 1-14. + * + * Suspending/resuming of root hub via sysfs works. Remote wakeup works too. + * And suspending/resuming of platform device works too. Suspend/resume + * via HCD operations vector is not implemented. + * + * Iso transfer support is not implemented. Adding this would include + * implementing recovery from the failure to service the processed ITL + * fifo ram in time, which will involve chip reset. + * + * TODO: + + More testing of suspend/resume. +*/ + +/* + ISP116x chips require certain delays between accesses to its + registers. The following timing options exist. + + 1. Configure your memory controller (the best) + 2. Implement platform-specific delay function possibly + combined with configuring the memory controller; see + include/linux/usb-isp116x.h for more info. Some broken + memory controllers line LH7A400 SMC need this. Also, + uncomment for that to work the following + USE_PLATFORM_DELAY macro. + 3. Use ndelay (easiest, poorest). For that, uncomment + the following USE_NDELAY macro. +*/ +#define USE_PLATFORM_DELAY +//#define USE_NDELAY + +//#define DEBUG +//#define VERBOSE +/* Transfer descriptors. See dump_ptd() for printout format */ +//#define PTD_TRACE +/* enqueuing/finishing log of urbs */ +//#define URB_TRACE + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/smp_lock.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/interrupt.h> +#include <linux/usb.h> +#include <linux/usb_isp116x.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/system.h> +#include <asm/byteorder.h> + +#ifndef DEBUG +# define STUB_DEBUG_FILE +#endif + +#include "../core/hcd.h" +#include "isp116x.h" + +#define DRIVER_VERSION "08 Apr 2005" +#define DRIVER_DESC "ISP116x USB Host Controller Driver" + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +static const char hcd_name[] = "isp116x-hcd"; + +/*-----------------------------------------------------------------*/ + +/* + Write len bytes to fifo, pad till 32-bit boundary + */ +static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len) +{ + u8 *dp = (u8 *) buf; + u16 *dp2 = (u16 *) buf; + u16 w; + int quot = len % 4; + + if ((unsigned long)dp2 & 1) { + /* not aligned */ + for (; len > 1; len -= 2) { + w = *dp++; + w |= *dp++ << 8; + isp116x_raw_write_data16(isp116x, w); + } + if (len) + isp116x_write_data16(isp116x, (u16) * dp); + } else { + /* aligned */ + for (; len > 1; len -= 2) + isp116x_raw_write_data16(isp116x, *dp2++); + if (len) + isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2)); + } + if (quot == 1 || quot == 2) + isp116x_raw_write_data16(isp116x, 0); +} + +/* + Read len bytes from fifo and then read till 32-bit boundary. + */ +static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len) +{ + u8 *dp = (u8 *) buf; + u16 *dp2 = (u16 *) buf; + u16 w; + int quot = len % 4; + + if ((unsigned long)dp2 & 1) { + /* not aligned */ + for (; len > 1; len -= 2) { + w = isp116x_raw_read_data16(isp116x); + *dp++ = w & 0xff; + *dp++ = (w >> 8) & 0xff; + } + if (len) + *dp = 0xff & isp116x_read_data16(isp116x); + } else { + /* aligned */ + for (; len > 1; len -= 2) + *dp2++ = isp116x_raw_read_data16(isp116x); + if (len) + *(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x); + } + if (quot == 1 || quot == 2) + isp116x_raw_read_data16(isp116x); +} + +/* + Write ptd's and data for scheduled transfers into + the fifo ram. Fifo must be empty and ready. +*/ +static void pack_fifo(struct isp116x *isp116x) +{ + struct isp116x_ep *ep; + struct ptd *ptd; + int buflen = isp116x->atl_last_dir == PTD_DIR_IN + ? isp116x->atl_bufshrt : isp116x->atl_buflen; + int ptd_count = 0; + + isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT); + isp116x_write_reg16(isp116x, HCXFERCTR, buflen); + isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET); + for (ep = isp116x->atl_active; ep; ep = ep->active) { + ++ptd_count; + ptd = &ep->ptd; + dump_ptd(ptd); + dump_ptd_out_data(ptd, ep->data); + isp116x_write_data16(isp116x, ptd->count); + isp116x_write_data16(isp116x, ptd->mps); + isp116x_write_data16(isp116x, ptd->len); + isp116x_write_data16(isp116x, ptd->faddr); + buflen -= sizeof(struct ptd); + /* Skip writing data for last IN PTD */ + if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) { + write_ptddata_to_fifo(isp116x, ep->data, ep->length); + buflen -= ALIGN(ep->length, 4); + } + } + BUG_ON(buflen); +} + +/* + Read the processed ptd's and data from fifo ram back to + URBs' buffers. Fifo must be full and done +*/ +static void unpack_fifo(struct isp116x *isp116x) +{ + struct isp116x_ep *ep; + struct ptd *ptd; + int buflen = isp116x->atl_last_dir == PTD_DIR_IN + ? isp116x->atl_buflen : isp116x->atl_bufshrt; + + isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT); + isp116x_write_reg16(isp116x, HCXFERCTR, buflen); + isp116x_write_addr(isp116x, HCATLPORT); + for (ep = isp116x->atl_active; ep; ep = ep->active) { + ptd = &ep->ptd; + ptd->count = isp116x_read_data16(isp116x); + ptd->mps = isp116x_read_data16(isp116x); + ptd->len = isp116x_read_data16(isp116x); + ptd->faddr = isp116x_read_data16(isp116x); + buflen -= sizeof(struct ptd); + /* Skip reading data for last Setup or Out PTD */ + if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) { + read_ptddata_from_fifo(isp116x, ep->data, ep->length); + buflen -= ALIGN(ep->length, 4); + } + dump_ptd(ptd); + dump_ptd_in_data(ptd, ep->data); + } + BUG_ON(buflen); +} + +/*---------------------------------------------------------------*/ + +/* + Set up PTD's. +*/ +static void preproc_atl_queue(struct isp116x *isp116x) +{ + struct isp116x_ep *ep; + struct urb *urb; + struct ptd *ptd; + u16 toggle, dir, len; + + for (ep = isp116x->atl_active; ep; ep = ep->active) { + BUG_ON(list_empty(&ep->hep->urb_list)); + urb = container_of(ep->hep->urb_list.next, + struct urb, urb_list); + ptd = &ep->ptd; + len = ep->length; + spin_lock(&urb->lock); + ep->data = (unsigned char *)urb->transfer_buffer + + urb->actual_length; + + switch (ep->nextpid) { + case USB_PID_IN: + toggle = usb_gettoggle(urb->dev, ep->epnum, 0); + dir = PTD_DIR_IN; + break; + case USB_PID_OUT: + toggle = usb_gettoggle(urb->dev, ep->epnum, 1); + dir = PTD_DIR_OUT; + break; + case USB_PID_SETUP: + toggle = 0; + dir = PTD_DIR_SETUP; + len = sizeof(struct usb_ctrlrequest); + ep->data = urb->setup_packet; + break; + case USB_PID_ACK: + toggle = 1; + len = 0; + dir = (urb->transfer_buffer_length + && usb_pipein(urb->pipe)) + ? PTD_DIR_OUT : PTD_DIR_IN; + break; + default: + /* To please gcc */ + toggle = dir = 0; + ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__, + ep->nextpid); + BUG_ON(1); + } + + ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle); + ptd->mps = PTD_MPS(ep->maxpacket) + | PTD_SPD(urb->dev->speed == USB_SPEED_LOW) + | PTD_EP(ep->epnum); + ptd->len = PTD_LEN(len) | PTD_DIR(dir); + ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe)); + spin_unlock(&urb->lock); + if (!ep->active) { + ptd->mps |= PTD_LAST_MSK; + isp116x->atl_last_dir = dir; + } + isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen; + isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4); + } +} + +/* + Analyze transfer results, handle partial transfers and errors +*/ +static void postproc_atl_queue(struct isp116x *isp116x) +{ + struct isp116x_ep *ep; + struct urb *urb; + struct usb_device *udev; + struct ptd *ptd; + int short_not_ok; + u8 cc; + + for (ep = isp116x->atl_active; ep; ep = ep->active) { + BUG_ON(list_empty(&ep->hep->urb_list)); + urb = + container_of(ep->hep->urb_list.next, struct urb, urb_list); + udev = urb->dev; + ptd = &ep->ptd; + cc = PTD_GET_CC(ptd); + + spin_lock(&urb->lock); + short_not_ok = 1; + + /* Data underrun is special. For allowed underrun + we clear the error and continue as normal. For + forbidden underrun we finish the DATA stage + immediately while for control transfer, + we do a STATUS stage. */ + if (cc == TD_DATAUNDERRUN) { + if (!(urb->transfer_flags & URB_SHORT_NOT_OK)) { + DBG("Allowed data underrun\n"); + cc = TD_CC_NOERROR; + short_not_ok = 0; + } else { + ep->error_count = 1; + if (usb_pipecontrol(urb->pipe)) + ep->nextpid = USB_PID_ACK; + else + usb_settoggle(udev, ep->epnum, + ep->nextpid == + USB_PID_OUT, + PTD_GET_TOGGLE(ptd) ^ 1); + urb->status = cc_to_error[TD_DATAUNDERRUN]; + spin_unlock(&urb->lock); + continue; + } + } + /* Keep underrun error through the STATUS stage */ + if (urb->status == cc_to_error[TD_DATAUNDERRUN]) + cc = TD_DATAUNDERRUN; + + if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED + && (++ep->error_count >= 3 || cc == TD_CC_STALL + || cc == TD_DATAOVERRUN)) { + if (urb->status == -EINPROGRESS) + urb->status = cc_to_error[cc]; + if (ep->nextpid == USB_PID_ACK) + ep->nextpid = 0; + spin_unlock(&urb->lock); + continue; + } + /* According to usb spec, zero-length Int transfer signals + finishing of the urb. Hey, does this apply only + for IN endpoints? */ + if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) { + if (urb->status == -EINPROGRESS) + urb->status = 0; + spin_unlock(&urb->lock); + continue; + } + + /* Relax after previously failed, but later succeeded + or correctly NAK'ed retransmission attempt */ + if (ep->error_count + && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED)) + ep->error_count = 0; + + /* Take into account idiosyncracies of the isp116x chip + regarding toggle bit for failed transfers */ + if (ep->nextpid == USB_PID_OUT) + usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd) + ^ (ep->error_count > 0)); + else if (ep->nextpid == USB_PID_IN) + usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd) + ^ (ep->error_count > 0)); + + switch (ep->nextpid) { + case USB_PID_IN: + case USB_PID_OUT: + urb->actual_length += PTD_GET_COUNT(ptd); + if (PTD_GET_ACTIVE(ptd) + || (cc != TD_CC_NOERROR && cc < 0x0E)) + break; + if (urb->transfer_buffer_length != urb->actual_length) { + if (short_not_ok) + break; + } else { + if (urb->transfer_flags & URB_ZERO_PACKET + && ep->nextpid == USB_PID_OUT + && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) { + DBG("Zero packet requested\n"); + break; + } + } + /* All data for this URB is transferred, let's finish */ + if (usb_pipecontrol(urb->pipe)) + ep->nextpid = USB_PID_ACK; + else if (urb->status == -EINPROGRESS) + urb->status = 0; + break; + case USB_PID_SETUP: + if (PTD_GET_ACTIVE(ptd) + || (cc != TD_CC_NOERROR && cc < 0x0E)) + break; + if (urb->transfer_buffer_length == urb->actual_length) + ep->nextpid = USB_PID_ACK; + else if (usb_pipeout(urb->pipe)) { + usb_settoggle(udev, 0, 1, 1); + ep->nextpid = USB_PID_OUT; + } else { + usb_settoggle(udev, 0, 0, 1); + ep->nextpid = USB_PID_IN; + } + break; + case USB_PID_ACK: + if (PTD_GET_ACTIVE(ptd) + || (cc != TD_CC_NOERROR && cc < 0x0E)) + break; + if (urb->status == -EINPROGRESS) + urb->status = 0; + ep->nextpid = 0; + break; + default: + BUG_ON(1); + } + spin_unlock(&urb->lock); + } +} + +/* + Take done or failed requests out of schedule. Give back + processed urbs. +*/ +static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep, + struct urb *urb, struct pt_regs *regs) +__releases(isp116x->lock) __acquires(isp116x->lock) +{ + unsigned i; + + urb->hcpriv = NULL; + ep->error_count = 0; + + if (usb_pipecontrol(urb->pipe)) + ep->nextpid = USB_PID_SETUP; + + urb_dbg(urb, "Finish"); + + spin_unlock(&isp116x->lock); + usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, regs); + spin_lock(&isp116x->lock); + + /* take idle endpoints out of the schedule */ + if (!list_empty(&ep->hep->urb_list)) + return; + + /* async deschedule */ + if (!list_empty(&ep->schedule)) { + list_del_init(&ep->schedule); + return; + } + + /* periodic deschedule */ + DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); + for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { + struct isp116x_ep *temp; + struct isp116x_ep **prev = &isp116x->periodic[i]; + + while (*prev && ((temp = *prev) != ep)) + prev = &temp->next; + if (*prev) + *prev = ep->next; + isp116x->load[i] -= ep->load; + } + ep->branch = PERIODIC_SIZE; + isp116x_to_hcd(isp116x)->self.bandwidth_allocated -= + ep->load / ep->period; + + /* switch irq type? */ + if (!--isp116x->periodic_count) { + isp116x->irqenb &= ~HCuPINT_SOF; + isp116x->irqenb |= HCuPINT_ATL; + } +} + +/* + Scan transfer lists, schedule transfers, send data off + to chip. + */ +static void start_atl_transfers(struct isp116x *isp116x) +{ + struct isp116x_ep *last_ep = NULL, *ep; + struct urb *urb; + u16 load = 0; + int len, index, speed, byte_time; + + if (atomic_read(&isp116x->atl_finishing)) + return; + + if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) + return; + + /* FIFO not empty? */ + if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL) + return; + + isp116x->atl_active = NULL; + isp116x->atl_buflen = isp116x->atl_bufshrt = 0; + + /* Schedule int transfers */ + if (isp116x->periodic_count) { + isp116x->fmindex = index = + (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1); + if ((load = isp116x->load[index])) { + /* Bring all int transfers for this frame + into the active queue */ + isp116x->atl_active = last_ep = + isp116x->periodic[index]; + while (last_ep->next) + last_ep = (last_ep->active = last_ep->next); + last_ep->active = NULL; + } + } + + /* Schedule control/bulk transfers */ + list_for_each_entry(ep, &isp116x->async, schedule) { + urb = container_of(ep->hep->urb_list.next, + struct urb, urb_list); + speed = urb->dev->speed; + byte_time = speed == USB_SPEED_LOW + ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED; + + if (ep->nextpid == USB_PID_SETUP) { + len = sizeof(struct usb_ctrlrequest); + } else if (ep->nextpid == USB_PID_ACK) { + len = 0; + } else { + /* Find current free length ... */ + len = (MAX_LOAD_LIMIT - load) / byte_time; + + /* ... then limit it to configured max size ... */ + len = min(len, speed == USB_SPEED_LOW ? + MAX_TRANSFER_SIZE_LOWSPEED : + MAX_TRANSFER_SIZE_FULLSPEED); + + /* ... and finally cut to the multiple of MaxPacketSize, + or to the real length if there's enough room. */ + if (len < + (urb->transfer_buffer_length - + urb->actual_length)) { + len -= len % ep->maxpacket; + if (!len) + continue; + } else + len = urb->transfer_buffer_length - + urb->actual_length; + BUG_ON(len < 0); + } + + load += len * byte_time; + if (load > MAX_LOAD_LIMIT) + break; + + ep->active = NULL; + ep->length = len; + if (last_ep) + last_ep->active = ep; + else + isp116x->atl_active = ep; + last_ep = ep; + } + + /* Avoid starving of endpoints */ + if ((&isp116x->async)->next != (&isp116x->async)->prev) + list_move(&isp116x->async, (&isp116x->async)->next); + + if (isp116x->atl_active) { + preproc_atl_queue(isp116x); + pack_fifo(isp116x); + } +} + +/* + Finish the processed transfers +*/ +static void finish_atl_transfers(struct isp116x *isp116x, struct pt_regs *regs) +{ + struct isp116x_ep *ep; + struct urb *urb; + + if (!isp116x->atl_active) + return; + /* Fifo not ready? */ + if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE)) + return; + + atomic_inc(&isp116x->atl_finishing); + unpack_fifo(isp116x); + postproc_atl_queue(isp116x); + for (ep = isp116x->atl_active; ep; ep = ep->active) { + urb = + container_of(ep->hep->urb_list.next, struct urb, urb_list); + /* USB_PID_ACK check here avoids finishing of + control transfers, for which TD_DATAUNDERRUN + occured, while URB_SHORT_NOT_OK was set */ + if (urb && urb->status != -EINPROGRESS + && ep->nextpid != USB_PID_ACK) + finish_request(isp116x, ep, urb, regs); + } + atomic_dec(&isp116x->atl_finishing); +} + +static irqreturn_t isp116x_irq(struct usb_hcd *hcd, struct pt_regs *regs) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + u16 irqstat; + irqreturn_t ret = IRQ_NONE; + + spin_lock(&isp116x->lock); + isp116x_write_reg16(isp116x, HCuPINTENB, 0); + irqstat = isp116x_read_reg16(isp116x, HCuPINT); + isp116x_write_reg16(isp116x, HCuPINT, irqstat); + + if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) { + ret = IRQ_HANDLED; + finish_atl_transfers(isp116x, regs); + } + + if (irqstat & HCuPINT_OPR) { + u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT); + isp116x_write_reg32(isp116x, HCINTSTAT, intstat); + if (intstat & HCINT_UE) { + ERR("Unrecoverable error\n"); + /* What should we do here? Reset? */ + } + if (intstat & HCINT_RHSC) { + isp116x->rhstatus = + isp116x_read_reg32(isp116x, HCRHSTATUS); + isp116x->rhport[0] = + isp116x_read_reg32(isp116x, HCRHPORT1); + isp116x->rhport[1] = + isp116x_read_reg32(isp116x, HCRHPORT2); + } + if (intstat & HCINT_RD) { + DBG("---- remote wakeup\n"); + schedule_work(&isp116x->rh_resume); + ret = IRQ_HANDLED; + } + irqstat &= ~HCuPINT_OPR; + ret = IRQ_HANDLED; + } + + if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) { + start_atl_transfers(isp116x); + } + + isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb); + spin_unlock(&isp116x->lock); + return ret; +} + +/*-----------------------------------------------------------------*/ + +/* usb 1.1 says max 90% of a frame is available for periodic transfers. + * this driver doesn't promise that much since it's got to handle an + * IRQ per packet; irq handling latencies also use up that time. + */ + +/* out of 1000 us */ +#define MAX_PERIODIC_LOAD 600 +static int balance(struct isp116x *isp116x, u16 period, u16 load) +{ + int i, branch = -ENOSPC; + + /* search for the least loaded schedule branch of that period + which has enough bandwidth left unreserved. */ + for (i = 0; i < period; i++) { + if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) { + int j; + + for (j = i; j < PERIODIC_SIZE; j += period) { + if ((isp116x->load[j] + load) + > MAX_PERIODIC_LOAD) + break; + } + if (j < PERIODIC_SIZE) + continue; + branch = i; + } + } + return branch; +} + +/* NB! ALL the code above this point runs with isp116x->lock + held, irqs off +*/ + +/*-----------------------------------------------------------------*/ + +static int isp116x_urb_enqueue(struct usb_hcd *hcd, + struct usb_host_endpoint *hep, struct urb *urb, + int mem_flags) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + struct usb_device *udev = urb->dev; + unsigned int pipe = urb->pipe; + int is_out = !usb_pipein(pipe); + int type = usb_pipetype(pipe); + int epnum = usb_pipeendpoint(pipe); + struct isp116x_ep *ep = NULL; + unsigned long flags; + int i; + int ret = 0; + + urb_dbg(urb, "Enqueue"); + + if (type == PIPE_ISOCHRONOUS) { + ERR("Isochronous transfers not supported\n"); + urb_dbg(urb, "Refused to enqueue"); + return -ENXIO; + } + /* avoid all allocations within spinlocks: request or endpoint */ + if (!hep->hcpriv) { + ep = kcalloc(1, sizeof *ep, (__force unsigned)mem_flags); + if (!ep) + return -ENOMEM; + } + + spin_lock_irqsave(&isp116x->lock, flags); + if (!HC_IS_RUNNING(hcd->state)) { + ret = -ENODEV; + goto fail; + } + + if (hep->hcpriv) + ep = hep->hcpriv; + else { + INIT_LIST_HEAD(&ep->schedule); + ep->udev = usb_get_dev(udev); + ep->epnum = epnum; + ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); + usb_settoggle(udev, epnum, is_out, 0); + + if (type == PIPE_CONTROL) { + ep->nextpid = USB_PID_SETUP; + } else if (is_out) { + ep->nextpid = USB_PID_OUT; + } else { + ep->nextpid = USB_PID_IN; + } + + if (urb->interval) { + /* + With INT URBs submitted, the driver works with SOF + interrupt enabled and ATL interrupt disabled. After + the PTDs are written to fifo ram, the chip starts + fifo processing and usb transfers after the next + SOF and continues until the transfers are finished + (succeeded or failed) or the frame ends. Therefore, + the transfers occur only in every second frame, + while fifo reading/writing and data processing + occur in every other second frame. */ + if (urb->interval < 2) + urb->interval = 2; + if (urb->interval > 2 * PERIODIC_SIZE) + urb->interval = 2 * PERIODIC_SIZE; + ep->period = urb->interval >> 1; + ep->branch = PERIODIC_SIZE; + ep->load = usb_calc_bus_time(udev->speed, + !is_out, + (type == PIPE_ISOCHRONOUS), + usb_maxpacket(udev, pipe, + is_out)) / + 1000; + } + hep->hcpriv = ep; + ep->hep = hep; + } + + /* maybe put endpoint into schedule */ + switch (type) { + case PIPE_CONTROL: + case PIPE_BULK: + if (list_empty(&ep->schedule)) + list_add_tail(&ep->schedule, &isp116x->async); + break; + case PIPE_INTERRUPT: + urb->interval = ep->period; + ep->length = min((int)ep->maxpacket, + urb->transfer_buffer_length); + + /* urb submitted for already existing endpoint */ + if (ep->branch < PERIODIC_SIZE) + break; + + ret = ep->branch = balance(isp116x, ep->period, ep->load); + if (ret < 0) + goto fail; + ret = 0; + + urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1)) + + ep->branch; + + /* sort each schedule branch by period (slow before fast) + to share the faster parts of the tree without needing + dummy/placeholder nodes */ + DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); + for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { + struct isp116x_ep **prev = &isp116x->periodic[i]; + struct isp116x_ep *here = *prev; + + while (here && ep != here) { + if (ep->period > here->period) + break; + prev = &here->next; + here = *prev; + } + if (ep != here) { + ep->next = here; + *prev = ep; + } + isp116x->load[i] += ep->load; + } + hcd->self.bandwidth_allocated += ep->load / ep->period; + + /* switch over to SOFint */ + if (!isp116x->periodic_count++) { + isp116x->irqenb &= ~HCuPINT_ATL; + isp116x->irqenb |= HCuPINT_SOF; + isp116x_write_reg16(isp116x, HCuPINTENB, + isp116x->irqenb); + } + } + + /* in case of unlink-during-submit */ + spin_lock(&urb->lock); + if (urb->status != -EINPROGRESS) { + spin_unlock(&urb->lock); + finish_request(isp116x, ep, urb, NULL); + ret = 0; + goto fail; + } + urb->hcpriv = hep; + spin_unlock(&urb->lock); + start_atl_transfers(isp116x); + + fail: + spin_unlock_irqrestore(&isp116x->lock, flags); + return ret; +} + +/* + Dequeue URBs. +*/ +static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + struct usb_host_endpoint *hep; + struct isp116x_ep *ep, *ep_act; + unsigned long flags; + + spin_lock_irqsave(&isp116x->lock, flags); + hep = urb->hcpriv; + /* URB already unlinked (or never linked)? */ + if (!hep) { + spin_unlock_irqrestore(&isp116x->lock, flags); + return 0; + } + ep = hep->hcpriv; + WARN_ON(hep != ep->hep); + + /* In front of queue? */ + if (ep->hep->urb_list.next == &urb->urb_list) + /* active? */ + for (ep_act = isp116x->atl_active; ep_act; + ep_act = ep_act->active) + if (ep_act == ep) { + VDBG("dequeue, urb %p active; wait for irq\n", + urb); + urb = NULL; + break; + } + + if (urb) + finish_request(isp116x, ep, urb, NULL); + + spin_unlock_irqrestore(&isp116x->lock, flags); + return 0; +} + +static void isp116x_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *hep) +{ + int i; + struct isp116x_ep *ep = hep->hcpriv;; + + if (!ep) + return; + + /* assume we'd just wait for the irq */ + for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++) + msleep(3); + if (!list_empty(&hep->urb_list)) + WARN("ep %p not empty?\n", ep); + + usb_put_dev(ep->udev); + kfree(ep); + hep->hcpriv = NULL; +} + +static int isp116x_get_frame(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + u32 fmnum; + unsigned long flags; + + spin_lock_irqsave(&isp116x->lock, flags); + fmnum = isp116x_read_reg32(isp116x, HCFMNUM); + spin_unlock_irqrestore(&isp116x->lock, flags); + return (int)fmnum; +} + +/*----------------------------------------------------------------*/ + +/* + Adapted from ohci-hub.c. Currently we don't support autosuspend. +*/ +static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + int ports, i, changed = 0; + + if (!HC_IS_RUNNING(hcd->state)) + return -ESHUTDOWN; + + ports = isp116x->rhdesca & RH_A_NDP; + + /* init status */ + if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC)) + buf[0] = changed = 1; + else + buf[0] = 0; + + for (i = 0; i < ports; i++) { + u32 status = isp116x->rhport[i]; + + if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC + | RH_PS_OCIC | RH_PS_PRSC)) { + changed = 1; + buf[0] |= 1 << (i + 1); + continue; + } + } + return changed; +} + +static void isp116x_hub_descriptor(struct isp116x *isp116x, + struct usb_hub_descriptor *desc) +{ + u32 reg = isp116x->rhdesca; + + desc->bDescriptorType = 0x29; + desc->bDescLength = 9; + desc->bHubContrCurrent = 0; + desc->bNbrPorts = (u8) (reg & 0x3); + /* Power switching, device type, overcurrent. */ + desc->wHubCharacteristics = + (__force __u16) cpu_to_le16((u16) ((reg >> 8) & 0x1f)); + desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff); + /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */ + desc->bitmap[0] = desc->bNbrPorts == 1 ? 1 << 1 : 3 << 1; + desc->bitmap[1] = ~0; +} + +/* Perform reset of a given port. + It would be great to just start the reset and let the + USB core to clear the reset in due time. However, + root hub ports should be reset for at least 50 ms, while + our chip stays in reset for about 10 ms. I.e., we must + repeatedly reset it ourself here. +*/ +static inline void root_port_reset(struct isp116x *isp116x, unsigned port) +{ + u32 tmp; + unsigned long flags, t; + + /* Root hub reset should be 50 ms, but some devices + want it even longer. */ + t = jiffies + msecs_to_jiffies(100); + + while (time_before(jiffies, t)) { + spin_lock_irqsave(&isp116x->lock, flags); + /* spin until any current reset finishes */ + for (;;) { + tmp = isp116x_read_reg32(isp116x, port ? + HCRHPORT2 : HCRHPORT1); + if (!(tmp & RH_PS_PRS)) + break; + udelay(500); + } + /* Don't reset a disconnected port */ + if (!(tmp & RH_PS_CCS)) { + spin_unlock_irqrestore(&isp116x->lock, flags); + break; + } + /* Reset lasts 10ms (claims datasheet) */ + isp116x_write_reg32(isp116x, port ? HCRHPORT2 : + HCRHPORT1, (RH_PS_PRS)); + spin_unlock_irqrestore(&isp116x->lock, flags); + msleep(10); + } +} + +/* Adapted from ohci-hub.c */ +static int isp116x_hub_control(struct usb_hcd *hcd, + u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + int ret = 0; + unsigned long flags; + int ports = isp116x->rhdesca & RH_A_NDP; + u32 tmp = 0; + + switch (typeReq) { + case ClearHubFeature: + DBG("ClearHubFeature: "); + switch (wValue) { + case C_HUB_OVER_CURRENT: + DBG("C_HUB_OVER_CURRENT\n"); + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC); + spin_unlock_irqrestore(&isp116x->lock, flags); + case C_HUB_LOCAL_POWER: + DBG("C_HUB_LOCAL_POWER\n"); + break; + default: + goto error; + } + break; + case SetHubFeature: + DBG("SetHubFeature: "); + switch (wValue) { + case C_HUB_OVER_CURRENT: + case C_HUB_LOCAL_POWER: + DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n"); + break; + default: + goto error; + } + break; + case GetHubDescriptor: + DBG("GetHubDescriptor\n"); + isp116x_hub_descriptor(isp116x, + (struct usb_hub_descriptor *)buf); + break; + case GetHubStatus: + DBG("GetHubStatus\n"); + *(__le32 *) buf = cpu_to_le32(0); + break; + case GetPortStatus: + DBG("GetPortStatus\n"); + if (!wIndex || wIndex > ports) + goto error; + tmp = isp116x->rhport[--wIndex]; + *(__le32 *) buf = cpu_to_le32(tmp); + DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp); + break; + case ClearPortFeature: + DBG("ClearPortFeature: "); + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + DBG("USB_PORT_FEAT_ENABLE\n"); + tmp = RH_PS_CCS; + break; + case USB_PORT_FEAT_C_ENABLE: + DBG("USB_PORT_FEAT_C_ENABLE\n"); + tmp = RH_PS_PESC; + break; + case USB_PORT_FEAT_SUSPEND: + DBG("USB_PORT_FEAT_SUSPEND\n"); + tmp = RH_PS_POCI; + break; + case USB_PORT_FEAT_C_SUSPEND: + DBG("USB_PORT_FEAT_C_SUSPEND\n"); + tmp = RH_PS_PSSC; + break; + case USB_PORT_FEAT_POWER: + DBG("USB_PORT_FEAT_POWER\n"); + tmp = RH_PS_LSDA; + break; + case USB_PORT_FEAT_C_CONNECTION: + DBG("USB_PORT_FEAT_C_CONNECTION\n"); + tmp = RH_PS_CSC; + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + DBG("USB_PORT_FEAT_C_OVER_CURRENT\n"); + tmp = RH_PS_OCIC; + break; + case USB_PORT_FEAT_C_RESET: + DBG("USB_PORT_FEAT_C_RESET\n"); + tmp = RH_PS_PRSC; + break; + default: + goto error; + } + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg32(isp116x, wIndex + ? HCRHPORT2 : HCRHPORT1, tmp); + isp116x->rhport[wIndex] = + isp116x_read_reg32(isp116x, wIndex ? HCRHPORT2 : HCRHPORT1); + spin_unlock_irqrestore(&isp116x->lock, flags); + break; + case SetPortFeature: + DBG("SetPortFeature: "); + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + switch (wValue) { + case USB_PORT_FEAT_SUSPEND: + DBG("USB_PORT_FEAT_SUSPEND\n"); + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg32(isp116x, wIndex + ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS); + break; + case USB_PORT_FEAT_POWER: + DBG("USB_PORT_FEAT_POWER\n"); + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg32(isp116x, wIndex + ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS); + break; + case USB_PORT_FEAT_RESET: + DBG("USB_PORT_FEAT_RESET\n"); + root_port_reset(isp116x, wIndex); + spin_lock_irqsave(&isp116x->lock, flags); + break; + default: + goto error; + } + isp116x->rhport[wIndex] = + isp116x_read_reg32(isp116x, wIndex ? HCRHPORT2 : HCRHPORT1); + spin_unlock_irqrestore(&isp116x->lock, flags); + break; + + default: + error: + /* "protocol stall" on error */ + DBG("PROTOCOL STALL\n"); + ret = -EPIPE; + } + return ret; +} + +#ifdef CONFIG_PM + +static int isp116x_hub_suspend(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + unsigned long flags; + u32 val; + int ret = 0; + + spin_lock_irqsave(&isp116x->lock, flags); + + val = isp116x_read_reg32(isp116x, HCCONTROL); + switch (val & HCCONTROL_HCFS) { + case HCCONTROL_USB_OPER: + hcd->state = HC_STATE_QUIESCING; + val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE); + val |= HCCONTROL_USB_SUSPEND; + if (hcd->remote_wakeup) + val |= HCCONTROL_RWE; + /* Wait for usb transfers to finish */ + mdelay(2); + isp116x_write_reg32(isp116x, HCCONTROL, val); + hcd->state = HC_STATE_SUSPENDED; + /* Wait for devices to suspend */ + mdelay(5); + case HCCONTROL_USB_SUSPEND: + break; + case HCCONTROL_USB_RESUME: + isp116x_write_reg32(isp116x, HCCONTROL, + (val & ~HCCONTROL_HCFS) | + HCCONTROL_USB_RESET); + case HCCONTROL_USB_RESET: + ret = -EBUSY; + break; + default: + ret = -EINVAL; + } + + spin_unlock_irqrestore(&isp116x->lock, flags); + return ret; +} + +static int isp116x_hub_resume(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + u32 val; + int ret = -EINPROGRESS; + + msleep(5); + spin_lock_irq(&isp116x->lock); + + val = isp116x_read_reg32(isp116x, HCCONTROL); + switch (val & HCCONTROL_HCFS) { + case HCCONTROL_USB_SUSPEND: + val &= ~HCCONTROL_HCFS; + val |= HCCONTROL_USB_RESUME; + isp116x_write_reg32(isp116x, HCCONTROL, val); + case HCCONTROL_USB_RESUME: + break; + case HCCONTROL_USB_OPER: + /* Without setting power_state here the + SUSPENDED state won't be removed from + sysfs/usbN/power.state as a response to remote + wakeup. Maybe in the future. */ + hcd->self.root_hub->dev.power.power_state = PMSG_ON; + ret = 0; + break; + default: + ret = -EBUSY; + } + + if (ret != -EINPROGRESS) { + spin_unlock_irq(&isp116x->lock); + return ret; + } + + val = isp116x->rhdesca & RH_A_NDP; + while (val--) { + u32 stat = + isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1); + /* force global, not selective, resume */ + if (!(stat & RH_PS_PSS)) + continue; + DBG("%s: Resuming port %d\n", __func__, val); + isp116x_write_reg32(isp116x, RH_PS_POCI, val + ? HCRHPORT2 : HCRHPORT1); + } + spin_unlock_irq(&isp116x->lock); + + hcd->state = HC_STATE_RESUMING; + mdelay(20); + + /* Go operational */ + spin_lock_irq(&isp116x->lock); + val = isp116x_read_reg32(isp116x, HCCONTROL); + isp116x_write_reg32(isp116x, HCCONTROL, + (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER); + spin_unlock_irq(&isp116x->lock); + /* see analogous comment above */ + hcd->self.root_hub->dev.power.power_state = PMSG_ON; + hcd->state = HC_STATE_RUNNING; + + return 0; +} + +static void isp116x_rh_resume(void *_hcd) +{ + struct usb_hcd *hcd = _hcd; + + usb_resume_device(hcd->self.root_hub); +} + +#else + +#define isp116x_hub_suspend NULL +#define isp116x_hub_resume NULL + +static void isp116x_rh_resume(void *_hcd) +{ +} + +#endif + +/*-----------------------------------------------------------------*/ + +#ifdef STUB_DEBUG_FILE + +static inline void create_debug_file(struct isp116x *isp116x) +{ +} + +static inline void remove_debug_file(struct isp116x *isp116x) +{ +} + +#else + +#include <linux/proc_fs.h> +#include <linux/seq_file.h> + +static void dump_irq(struct seq_file *s, char *label, u16 mask) +{ + seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask, + mask & HCuPINT_CLKRDY ? " clkrdy" : "", + mask & HCuPINT_SUSP ? " susp" : "", + mask & HCuPINT_OPR ? " opr" : "", + mask & HCuPINT_AIIEOT ? " eot" : "", + mask & HCuPINT_ATL ? " atl" : "", + mask & HCuPINT_SOF ? " sof" : ""); +} + +static void dump_int(struct seq_file *s, char *label, u32 mask) +{ + seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask, + mask & HCINT_MIE ? " MIE" : "", + mask & HCINT_RHSC ? " rhsc" : "", + mask & HCINT_FNO ? " fno" : "", + mask & HCINT_UE ? " ue" : "", + mask & HCINT_RD ? " rd" : "", + mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : ""); +} + +static int proc_isp116x_show(struct seq_file *s, void *unused) +{ + struct isp116x *isp116x = s->private; + struct isp116x_ep *ep; + struct urb *urb; + unsigned i; + char *str; + + seq_printf(s, "%s\n%s version %s\n", + isp116x_to_hcd(isp116x)->product_desc, hcd_name, + DRIVER_VERSION); + + if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) { + seq_printf(s, "HCD is suspended\n"); + return 0; + } + if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) { + seq_printf(s, "HCD not running\n"); + return 0; + } + + spin_lock_irq(&isp116x->lock); + + dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB)); + dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT)); + dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB)); + dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT)); + + list_for_each_entry(ep, &isp116x->async, schedule) { + + switch (ep->nextpid) { + case USB_PID_IN: + str = "in"; + break; + case USB_PID_OUT: + str = "out"; + break; + case USB_PID_SETUP: + str = "setup"; + break; + case USB_PID_ACK: + str = "status"; + break; + default: + str = "?"; + break; + }; + seq_printf(s, "%p, ep%d%s, maxpacket %d:\n", ep, + ep->epnum, str, ep->maxpacket); + list_for_each_entry(urb, &ep->hep->urb_list, urb_list) { + seq_printf(s, " urb%p, %d/%d\n", urb, + urb->actual_length, + urb->transfer_buffer_length); + } + } + if (!list_empty(&isp116x->async)) + seq_printf(s, "\n"); + + seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE); + + for (i = 0; i < PERIODIC_SIZE; i++) { + ep = isp116x->periodic[i]; + if (!ep) + continue; + seq_printf(s, "%2d [%3d]:\n", i, isp116x->load[i]); + + /* DUMB: prints shared entries multiple times */ + do { + seq_printf(s, " %d/%p (%sdev%d ep%d%s max %d)\n", + ep->period, ep, + (ep->udev->speed == + USB_SPEED_FULL) ? "" : "ls ", + ep->udev->devnum, ep->epnum, + (ep->epnum == + 0) ? "" : ((ep->nextpid == + USB_PID_IN) ? "in" : "out"), + ep->maxpacket); + ep = ep->next; + } while (ep); + } + spin_unlock_irq(&isp116x->lock); + seq_printf(s, "\n"); + + return 0; +} + +static int proc_isp116x_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_isp116x_show, PDE(inode)->data); +} + +static struct file_operations proc_ops = { + .open = proc_isp116x_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +/* expect just one isp116x per system */ +static const char proc_filename[] = "driver/isp116x"; + +static void create_debug_file(struct isp116x *isp116x) +{ + struct proc_dir_entry *pde; + + pde = create_proc_entry(proc_filename, 0, NULL); + if (pde == NULL) + return; + + pde->proc_fops = &proc_ops; + pde->data = isp116x; + isp116x->pde = pde; +} + +static void remove_debug_file(struct isp116x *isp116x) +{ + if (isp116x->pde) + remove_proc_entry(proc_filename, NULL); +} + +#endif + +/*-----------------------------------------------------------------*/ + +/* + Software reset - can be called from any contect. +*/ +static int isp116x_sw_reset(struct isp116x *isp116x) +{ + int retries = 15; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC); + isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR); + while (--retries) { + /* It usually resets within 1 ms */ + mdelay(1); + if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR)) + break; + } + if (!retries) { + ERR("Software reset timeout\n"); + ret = -ETIME; + } + spin_unlock_irqrestore(&isp116x->lock, flags); + return ret; +} + +/* + Reset. Tries to perform platform-specific hardware + reset first; falls back to software reset. +*/ +static int isp116x_reset(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + unsigned long t; + u16 clkrdy = 0; + int ret = 0, timeout = 15 /* ms */ ; + + if (isp116x->board && isp116x->board->reset) { + /* Hardware reset */ + isp116x->board->reset(hcd->self.controller, 1); + msleep(10); + if (isp116x->board->clock) + isp116x->board->clock(hcd->self.controller, 1); + msleep(1); + isp116x->board->reset(hcd->self.controller, 0); + } else + ret = isp116x_sw_reset(isp116x); + + if (ret) + return ret; + + t = jiffies + msecs_to_jiffies(timeout); + while (time_before_eq(jiffies, t)) { + msleep(4); + spin_lock_irq(&isp116x->lock); + clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY; + spin_unlock_irq(&isp116x->lock); + if (clkrdy) + break; + } + if (!clkrdy) { + ERR("Clock not ready after 20ms\n"); + /* After sw_reset the clock won't report to be ready, if + H_WAKEUP pin is high. */ + if (!isp116x->board || !isp116x->board->reset) + ERR("The driver does not support hardware wakeup.\n"); + ERR("Please make sure that the H_WAKEUP pin " + "is pulled low!\n"); + ret = -ENODEV; + } + return ret; +} + +static void isp116x_stop(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + unsigned long flags; + u32 val; + + spin_lock_irqsave(&isp116x->lock, flags); + isp116x_write_reg16(isp116x, HCuPINTENB, 0); + + /* Switch off ports' power, some devices don't come up + after next 'insmod' without this */ + val = isp116x_read_reg32(isp116x, HCRHDESCA); + val &= ~(RH_A_NPS | RH_A_PSM); + isp116x_write_reg32(isp116x, HCRHDESCA, val); + isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS); + spin_unlock_irqrestore(&isp116x->lock, flags); + + /* Put the chip into reset state */ + if (isp116x->board && isp116x->board->reset) + isp116x->board->reset(hcd->self.controller, 0); + else + isp116x_sw_reset(isp116x); + + /* Stop the clock */ + if (isp116x->board && isp116x->board->clock) + isp116x->board->clock(hcd->self.controller, 0); +} + +/* + Configure the chip. The chip must be successfully reset by now. +*/ +static int isp116x_start(struct usb_hcd *hcd) +{ + struct isp116x *isp116x = hcd_to_isp116x(hcd); + struct isp116x_platform_data *board = isp116x->board; + u32 val; + unsigned long flags; + + spin_lock_irqsave(&isp116x->lock, flags); + + /* clear interrupt status and disable all interrupt sources */ + isp116x_write_reg16(isp116x, HCuPINT, 0xff); + isp116x_write_reg16(isp116x, HCuPINTENB, 0); + + val = isp116x_read_reg16(isp116x, HCCHIPID); + if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) { + ERR("Invalid chip ID %04x\n", val); + spin_unlock_irqrestore(&isp116x->lock, flags); + return -ENODEV; + } + + isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE); + isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE); + + /* ----- HW conf */ + val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1); + if (board->sel15Kres) + val |= HCHWCFG_15KRSEL; + /* Remote wakeup won't work without working clock */ + if (board->clknotstop || board->remote_wakeup_enable) + val |= HCHWCFG_CLKNOTSTOP; + if (board->oc_enable) + val |= HCHWCFG_ANALOG_OC; + if (board->int_act_high) + val |= HCHWCFG_INT_POL; + if (board->int_edge_triggered) + val |= HCHWCFG_INT_TRIGGER; + isp116x_write_reg16(isp116x, HCHWCFG, val); + + /* ----- Root hub conf */ + val = 0; + /* AN10003_1.pdf recommends NPS to be always 1 */ + if (board->no_power_switching) + val |= RH_A_NPS; + if (board->power_switching_mode) + val |= RH_A_PSM; + if (board->potpg) + val |= (board->potpg << 24) & RH_A_POTPGT; + else + val |= (25 << 24) & RH_A_POTPGT; + isp116x_write_reg32(isp116x, HCRHDESCA, val); + isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA); + + val = RH_B_PPCM; + isp116x_write_reg32(isp116x, HCRHDESCB, val); + isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB); + + val = 0; + if (board->remote_wakeup_enable) { + hcd->can_wakeup = 1; + val |= RH_HS_DRWE; + } + isp116x_write_reg32(isp116x, HCRHSTATUS, val); + isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS); + + isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf); + + hcd->state = HC_STATE_RUNNING; + + /* Set up interrupts */ + isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE; + if (board->remote_wakeup_enable) + isp116x->intenb |= HCINT_RD; + isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */ + isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb); + isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb); + + /* Go operational */ + val = HCCONTROL_USB_OPER; + /* Remote wakeup connected - NOT SUPPORTED */ + /* if (board->remote_wakeup_connected) + val |= HCCONTROL_RWC; */ + if (board->remote_wakeup_enable) + val |= HCCONTROL_RWE; + isp116x_write_reg32(isp116x, HCCONTROL, val); + + /* Disable ports to avoid race in device enumeration */ + isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS); + isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS); + + isp116x_show_regs(isp116x); + spin_unlock_irqrestore(&isp116x->lock, flags); + return 0; +} + +/*-----------------------------------------------------------------*/ + +static struct hc_driver isp116x_hc_driver = { + .description = hcd_name, + .product_desc = "ISP116x Host Controller", + .hcd_priv_size = sizeof(struct isp116x), + + .irq = isp116x_irq, + .flags = HCD_USB11, + + .reset = isp116x_reset, + .start = isp116x_start, + .stop = isp116x_stop, + + .urb_enqueue = isp116x_urb_enqueue, + .urb_dequeue = isp116x_urb_dequeue, + .endpoint_disable = isp116x_endpoint_disable, + + .get_frame_number = isp116x_get_frame, + + .hub_status_data = isp116x_hub_status_data, + .hub_control = isp116x_hub_control, + .hub_suspend = isp116x_hub_suspend, + .hub_resume = isp116x_hub_resume, +}; + +/*----------------------------------------------------------------*/ + +static int __init_or_module isp116x_remove(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct isp116x *isp116x; + struct platform_device *pdev; + struct resource *res; + + if(!hcd) + return 0; + isp116x = hcd_to_isp116x(hcd); + pdev = container_of(dev, struct platform_device, dev); + remove_debug_file(isp116x); + usb_remove_hcd(hcd); + + iounmap(isp116x->data_reg); + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + release_mem_region(res->start, 2); + iounmap(isp116x->addr_reg); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, 2); + + usb_put_hcd(hcd); + return 0; +} + +#define resource_len(r) (((r)->end - (r)->start) + 1) + +static int __init isp116x_probe(struct device *dev) +{ + struct usb_hcd *hcd; + struct isp116x *isp116x; + struct platform_device *pdev; + struct resource *addr, *data; + void __iomem *addr_reg; + void __iomem *data_reg; + int irq; + int ret = 0; + + pdev = container_of(dev, struct platform_device, dev); + if (pdev->num_resources < 3) { + ret = -ENODEV; + goto err1; + } + + data = platform_get_resource(pdev, IORESOURCE_MEM, 0); + addr = platform_get_resource(pdev, IORESOURCE_MEM, 1); + irq = platform_get_irq(pdev, 0); + if (!addr || !data || irq < 0) { + ret = -ENODEV; + goto err1; + } + + if (dev->dma_mask) { + DBG("DMA not supported\n"); + ret = -EINVAL; + goto err1; + } + + if (!request_mem_region(addr->start, 2, hcd_name)) { + ret = -EBUSY; + goto err1; + } + addr_reg = ioremap(addr->start, resource_len(addr)); + if (addr_reg == NULL) { + ret = -ENOMEM; + goto err2; + } + if (!request_mem_region(data->start, 2, hcd_name)) { + ret = -EBUSY; + goto err3; + } + data_reg = ioremap(data->start, resource_len(data)); + if (data_reg == NULL) { + ret = -ENOMEM; + goto err4; + } + + /* allocate and initialize hcd */ + hcd = usb_create_hcd(&isp116x_hc_driver, dev, dev->bus_id); + if (!hcd) { + ret = -ENOMEM; + goto err5; + } + /* this rsrc_start is bogus */ + hcd->rsrc_start = addr->start; + isp116x = hcd_to_isp116x(hcd); + isp116x->data_reg = data_reg; + isp116x->addr_reg = addr_reg; + spin_lock_init(&isp116x->lock); + INIT_LIST_HEAD(&isp116x->async); + INIT_WORK(&isp116x->rh_resume, isp116x_rh_resume, hcd); + isp116x->board = dev->platform_data; + + if (!isp116x->board) { + ERR("Platform data structure not initialized\n"); + ret = -ENODEV; + goto err6; + } + if (isp116x_check_platform_delay(isp116x)) { + ERR("USE_PLATFORM_DELAY defined, but delay function not " + "implemented.\n"); + ERR("See comments in drivers/usb/host/isp116x-hcd.c\n"); + ret = -ENODEV; + goto err6; + } + + ret = usb_add_hcd(hcd, irq, SA_INTERRUPT); + if (ret != 0) + goto err6; + + create_debug_file(isp116x); + return 0; + + err6: + usb_put_hcd(hcd); + err5: + iounmap(data_reg); + err4: + release_mem_region(data->start, 2); + err3: + iounmap(addr_reg); + err2: + release_mem_region(addr->start, 2); + err1: + ERR("init error, %d\n", ret); + return ret; +} + +#ifdef CONFIG_PM +/* + Suspend of platform device +*/ +static int isp116x_suspend(struct device *dev, pm_message_t state, u32 phase) +{ + int ret = 0; + struct usb_hcd *hcd = dev_get_drvdata(dev); + + VDBG("%s: state %x, phase %x\n", __func__, state, phase); + + if (phase != SUSPEND_DISABLE && phase != SUSPEND_POWER_DOWN) + return 0; + + ret = usb_suspend_device(hcd->self.root_hub, state); + if (!ret) { + dev->power.power_state = state; + INFO("%s suspended\n", (char *)hcd_name); + } else + ERR("%s suspend failed\n", (char *)hcd_name); + + return ret; +} + +/* + Resume platform device +*/ +static int isp116x_resume(struct device *dev, u32 phase) +{ + int ret = 0; + struct usb_hcd *hcd = dev_get_drvdata(dev); + + VDBG("%s: state %x, phase %x\n", __func__, dev->power.power_state, + phase); + if (phase != RESUME_POWER_ON) + return 0; + + ret = usb_resume_device(hcd->self.root_hub); + if (!ret) { + dev->power.power_state = PMSG_ON; + VDBG("%s resumed\n", (char *)hcd_name); + } + return ret; +} + +#else + +#define isp116x_suspend NULL +#define isp116x_resume NULL + +#endif + +static struct device_driver isp116x_driver = { + .name = (char *)hcd_name, + .bus = &platform_bus_type, + .probe = isp116x_probe, + .remove = isp116x_remove, + .suspend = isp116x_suspend, + .resume = isp116x_resume, +}; + +/*-----------------------------------------------------------------*/ + +static int __init isp116x_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION); + return driver_register(&isp116x_driver); +} + +module_init(isp116x_init); + +static void __exit isp116x_cleanup(void) +{ + driver_unregister(&isp116x_driver); +} + +module_exit(isp116x_cleanup); |
