--- /dev/null
+/*
+ * SL811HS HCD (Host Controller Driver) for USB.
+ *
+ * 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 SL811HS controller handles host side USB (like the SL11H, but with
+ * another register set and SOF generation) as well as peripheral side USB
+ * (like the SL811S). This driver version doesn't implement the Gadget API
+ * for the peripheral role; or OTG (that'd need much external circuitry).
+ *
+ * For documentation, see the SL811HS spec and the "SL811HS Embedded Host"
+ * document (providing significant pieces missing from that spec); plus
+ * the SL811S spec if you want peripheral side info.
+ */
+
+/*
+ * Status: Passed basic stress testing, works with hubs, mice, keyboards,
+ * and usb-storage.
+ *
+ * TODO:
+ * - usb suspend/resume triggered by sl811 (with USB_SUSPEND)
+ * - various issues noted in the code
+ * - performance work; use both register banks; ...
+ * - use urb->iso_frame_desc[] with ISO transfers
+ */
+
+#undef VERBOSE
+#undef PACKET_TRACE
+
+#include <linux/config.h>
+
+#ifdef CONFIG_USB_DEBUG
+# define DEBUG
+#else
+# undef DEBUG
+#endif
+
+#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/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <linux/usb_sl811.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/byteorder.h>
+
+#include "../core/hcd.h"
+#include "sl811.h"
+
+
+MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_VERSION "06 Dec 2004"
+
+
+#ifndef DEBUG
+# define STUB_DEBUG_FILE
+#endif
+
+/* for now, use only one transfer register bank */
+#undef USE_B
+
+/* this doesn't understand urb->iso_frame_desc[], but if you had a driver
+ * that just queued one ISO frame per URB then iso transfers "should" work
+ * using the normal urb status fields.
+ */
+#define DISABLE_ISO
+
+// #define QUIRK2
+#define QUIRK3
+
+static const char hcd_name[] = "sl811-hcd";
+
+/*-------------------------------------------------------------------------*/
+
+static irqreturn_t sl811h_irq(int irq, void *_sl811, struct pt_regs *regs);
+
+static void port_power(struct sl811 *sl811, int is_on)
+{
+ /* hub is inactive unless the port is powered */
+ if (is_on) {
+ if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
+ return;
+
+ sl811->port1 = (1 << USB_PORT_FEAT_POWER);
+ sl811->irq_enable = SL11H_INTMASK_INSRMV;
+ sl811->hcd.self.controller->power.power_state = PM_SUSPEND_ON;
+ } else {
+ sl811->port1 = 0;
+ sl811->irq_enable = 0;
+ sl811->hcd.state = USB_STATE_HALT;
+ sl811->hcd.self.controller->power.power_state = PM_SUSPEND_DISK;
+ }
+ sl811->ctrl1 = 0;
+ sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
+ sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
+
+ if (sl811->board && sl811->board->port_power) {
+ /* switch VBUS, at 500mA unless hub power budget gets set */
+ DBG("power %s\n", is_on ? "on" : "off");
+ sl811->board->port_power(sl811->hcd.self.controller, is_on);
+ }
+
+ /* reset as thoroughly as we can */
+ if (sl811->board && sl811->board->reset)
+ sl811->board->reset(sl811->hcd.self.controller);
+
+ sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+ sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
+ sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
+
+ // if !is_on, put into lowpower mode now
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue,
+ * and may start I/O. Endpoint queues are scanned during completion irq
+ * handlers (one per packet: ACK, NAK, faults, etc) and urb cancelation.
+ *
+ * Using an external DMA engine to copy a packet at a time could work,
+ * though setup/teardown costs may be too big to make it worthwhile.
+ */
+
+/* SETUP starts a new control request. Devices are not allowed to
+ * STALL or NAK these; they must cancel any pending control requests.
+ */
+static void setup_packet(
+ struct sl811 *sl811,
+ struct sl811h_ep *ep,
+ struct urb *urb,
+ u8 bank,
+ u8 control
+)
+{
+ u8 addr;
+ u8 len;
+ void __iomem *data_reg;
+
+ addr = SL811HS_PACKET_BUF(bank == 0);
+ len = sizeof(struct usb_ctrlrequest);
+ data_reg = sl811->data_reg;
+ sl811_write_buf(sl811, addr, urb->setup_packet, len);
+
+ /* autoincrementing */
+ sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
+ writeb(len, data_reg);
+ writeb(SL_SETUP /* | ep->epnum */, data_reg);
+ writeb(usb_pipedevice(urb->pipe), data_reg);
+
+ /* always OUT/data0 */ ;
+ sl811_write(sl811, bank + SL11H_HOSTCTLREG,
+ control | SL11H_HCTLMASK_OUT);
+ ep->length = 0;
+ PACKET("SETUP qh%p\n", ep);
+}
+
+/* STATUS finishes control requests, often after IN or OUT data packets */
+static void status_packet(
+ struct sl811 *sl811,
+ struct sl811h_ep *ep,
+ struct urb *urb,
+ u8 bank,
+ u8 control
+)
+{
+ int do_out;
+ void __iomem *data_reg;
+
+ do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
+ data_reg = sl811->data_reg;
+
+ /* autoincrementing */
+ sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
+ writeb(0, data_reg);
+ writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
+ writeb(usb_pipedevice(urb->pipe), data_reg);
+
+ /* always data1; sometimes IN */
+ control |= SL11H_HCTLMASK_TOGGLE;
+ if (do_out)
+ control |= SL11H_HCTLMASK_OUT;
+ sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
+ ep->length = 0;
+ PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
+ do_out ? "out" : "in", ep);
+}
+
+/* IN packets can be used with any type of endpoint. here we just
+ * start the transfer, data from the peripheral may arrive later.
+ * urb->iso_frame_desc is currently ignored here...
+ */
+static void in_packet(
+ struct sl811 *sl811,
+ struct sl811h_ep *ep,
+ struct urb *urb,
+ u8 bank,
+ u8 control
+)
+{
+ u8 addr;
+ u8 len;
+ void __iomem *data_reg;
+
+ /* avoid losing data on overflow */
+ len = ep->maxpacket;
+ addr = SL811HS_PACKET_BUF(bank == 0);
+ if (!(control & SL11H_HCTLMASK_ISOCH)
+ && usb_gettoggle(urb->dev, ep->epnum, 0))
+ control |= SL11H_HCTLMASK_TOGGLE;
+ data_reg = sl811->data_reg;
+
+ /* autoincrementing */
+ sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
+ writeb(len, data_reg);
+ writeb(SL_IN | ep->epnum, data_reg);
+ writeb(usb_pipedevice(urb->pipe), data_reg);
+
+ sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
+ ep->length = min((int)len,
+ urb->transfer_buffer_length - urb->actual_length);
+ PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
+ !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
+}
+
+/* OUT packets can be used with any type of endpoint.
+ * urb->iso_frame_desc is currently ignored here...
+ */
+static void out_packet(
+ struct sl811 *sl811,
+ struct sl811h_ep *ep,
+ struct urb *urb,
+ u8 bank,
+ u8 control
+)
+{
+ void *buf;
+ u8 addr;
+ u8 len;
+ void __iomem *data_reg;
+
+ buf = urb->transfer_buffer + urb->actual_length;
+ prefetch(buf);
+
+ len = min((int)ep->maxpacket,
+ urb->transfer_buffer_length - urb->actual_length);
+
+ if (!(control & SL11H_HCTLMASK_ISOCH)
+ && usb_gettoggle(urb->dev, ep->epnum, 1))
+ control |= SL11H_HCTLMASK_TOGGLE;
+ addr = SL811HS_PACKET_BUF(bank == 0);
+ data_reg = sl811->data_reg;
+
+ sl811_write_buf(sl811, addr, buf, len);
+
+ /* autoincrementing */
+ sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
+ writeb(len, data_reg);
+ writeb(SL_OUT | ep->epnum, data_reg);
+ writeb(usb_pipedevice(urb->pipe), data_reg);
+
+ sl811_write(sl811, bank + SL11H_HOSTCTLREG,
+ control | SL11H_HCTLMASK_OUT);
+ ep->length = len;
+ PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
+ !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* caller updates on-chip enables later */
+
+static inline void sofirq_on(struct sl811 *sl811)
+{
+ if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
+ return;
+ VDBG("sof irq on\n");
+ sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
+}
+
+static inline void sofirq_off(struct sl811 *sl811)
+{
+ if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
+ return;
+ VDBG("sof irq off\n");
+ sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* pick the next endpoint for a transaction, and issue it.
+ * frames start with periodic transfers (after whatever is pending
+ * from the previous frame), and the rest of the time is async
+ * transfers, scheduled round-robin.
+ */
+static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
+{
+ struct sl811h_ep *ep;
+ struct sl811h_req *req;
+ struct urb *urb;
+ int fclock;
+ u8 control;
+
+ /* use endpoint at schedule head */
+ if (sl811->next_periodic) {
+ ep = sl811->next_periodic;
+ sl811->next_periodic = ep->next;
+ } else {
+ if (sl811->next_async)
+ ep = sl811->next_async;
+ else if (!list_empty(&sl811->async))
+ ep = container_of(sl811->async.next,
+ struct sl811h_ep, schedule);
+ else {
+ /* could set up the first fullspeed periodic
+ * transfer for the next frame ...
+ */
+ return NULL;
+ }
+
+#ifdef USE_B
+ if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
+ return NULL;
+#endif
+
+ if (ep->schedule.next == &sl811->async)
+ sl811->next_async = NULL;
+ else
+ sl811->next_async = container_of(ep->schedule.next,
+ struct sl811h_ep, schedule);
+ }
+
+ if (unlikely(list_empty(&ep->queue))) {
+ DBG("empty %p queue?\n", ep);
+ return NULL;
+ }
+
+ req = container_of(ep->queue.next, struct sl811h_req, queue);
+ urb = req->urb;
+ control = ep->defctrl;
+
+ /* if this frame doesn't have enough time left to transfer this
+ * packet, wait till the next frame. too-simple algorithm...
+ */
+ fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
+ fclock -= 100; /* setup takes not much time */
+ if (urb->dev->speed == USB_SPEED_LOW) {
+ if (control & SL11H_HCTLMASK_PREAMBLE) {
+ /* also note erratum 1: some hubs won't work */
+ fclock -= 800;
+ }
+ fclock -= ep->maxpacket << 8;
+
+ /* erratum 2: AFTERSOF only works for fullspeed */
+ if (fclock < 0) {
+ if (ep->period)
+ sl811->stat_overrun++;
+ sofirq_on(sl811);
+ return NULL;
+ }
+ } else {
+ fclock -= 12000 / 19; /* 19 64byte packets/msec */
+ if (fclock < 0) {
+ if (ep->period)
+ sl811->stat_overrun++;
+ control |= SL11H_HCTLMASK_AFTERSOF;
+
+ /* throttle bulk/control irq noise */
+ } else if (ep->nak_count)
+ control |= SL11H_HCTLMASK_AFTERSOF;
+ }
+
+
+ switch (ep->nextpid) {
+ case USB_PID_IN:
+ in_packet(sl811, ep, urb, bank, control);
+ break;
+ case USB_PID_OUT:
+ out_packet(sl811, ep, urb, bank, control);
+ break;
+ case USB_PID_SETUP:
+ setup_packet(sl811, ep, urb, bank, control);
+ break;
+ case USB_PID_ACK: /* for control status */
+ status_packet(sl811, ep, urb, bank, control);
+ break;
+ default:
+ DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
+ ep = NULL;
+ }
+ return ep;
+}
+
+#define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
+
+static inline void start_transfer(struct sl811 *sl811)
+{
+ if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
+ return;
+ if (sl811->active_a == NULL) {
+ sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
+ if (sl811->active_a != NULL)
+ sl811->jiffies_a = jiffies + MIN_JIFFIES;
+ }
+#ifdef USE_B
+ if (sl811->active_b == NULL) {
+ sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
+ if (sl811->active_b != NULL)
+ sl811->jiffies_b = jiffies + MIN_JIFFIES;
+ }
+#endif
+}
+
+static void finish_request(
+ struct sl811 *sl811,
+ struct sl811h_ep *ep,
+ struct sl811h_req *req,
+ struct pt_regs *regs,
+ int status
+) __releases(sl811->lock) __acquires(sl811->lock)
+{
+ unsigned i;
+ struct urb *urb = req->urb;
+
+ list_del(&req->queue);
+ kfree(req);
+ urb->hcpriv = NULL;
+
+ if (usb_pipecontrol(urb->pipe))
+ ep->nextpid = USB_PID_SETUP;
+
+ spin_lock(&urb->lock);
+ if (urb->status == -EINPROGRESS)
+ urb->status = status;
+ spin_unlock(&urb->lock);
+
+ spin_unlock(&sl811->lock);
+ usb_hcd_giveback_urb(&sl811->hcd, urb, regs);
+ spin_lock(&sl811->lock);
+
+ /* leave active endpoints in the schedule */
+ if (!list_empty(&ep->queue))
+ return;
+
+ /* async deschedule? */
+ if (!list_empty(&ep->schedule)) {
+ list_del_init(&ep->schedule);
+ if (ep == sl811->next_async)
+ sl811->next_async = NULL;
+ 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 sl811h_ep *temp;
+ struct sl811h_ep **prev = &sl811->periodic[i];
+
+ while (*prev && ((temp = *prev) != ep))
+ prev = &temp->next;
+ if (*prev)
+ *prev = ep->next;
+ sl811->load[i] -= ep->load;
+ }
+ ep->branch = PERIODIC_SIZE;
+ sl811->periodic_count--;
+ hcd_to_bus(&sl811->hcd)->bandwidth_allocated
+ -= ep->load / ep->period;
+ if (ep == sl811->next_periodic)
+ sl811->next_periodic = ep->next;
+
+ /* we might turn SOFs back on again for the async schedule */
+ if (sl811->periodic_count == 0)
+ sofirq_off(sl811);
+}
+
+static void
+done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank, struct pt_regs *regs)
+{
+ u8 status;
+ struct sl811h_req *req;
+ struct urb *urb;
+ int urbstat = -EINPROGRESS;
+
+ if (unlikely(!ep))
+ return;
+
+ status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
+
+ req = container_of(ep->queue.next, struct sl811h_req, queue);
+ urb = req->urb;
+
+ /* we can safely ignore NAKs */
+ if (status & SL11H_STATMASK_NAK) {
+ // PACKET("...NAK_%02x qh%p\n", bank, ep);
+ if (!ep->period)
+ ep->nak_count++;
+ ep->error_count = 0;
+
+ /* ACK advances transfer, toggle, and maybe queue */
+ } else if (status & SL11H_STATMASK_ACK) {
+ struct usb_device *udev = urb->dev;
+ int len;
+ unsigned char *buf;
+
+ /* urb->iso_frame_desc is currently ignored here... */
+
+ ep->nak_count = ep->error_count = 0;
+ switch (ep->nextpid) {
+ case USB_PID_OUT:
+ // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
+ urb->actual_length += ep->length;
+ usb_dotoggle(udev, ep->epnum, 1);
+ if (urb->actual_length
+ == urb->transfer_buffer_length) {
+ if (usb_pipecontrol(urb->pipe))
+ ep->nextpid = USB_PID_ACK;
+
+ /* some bulk protocols terminate OUT transfers
+ * by a short packet, using ZLPs not padding.
+ */
+ else if (ep->length < ep->maxpacket
+ || !(urb->transfer_flags
+ & URB_ZERO_PACKET))
+ urbstat = 0;
+ }
+ break;
+ case USB_PID_IN:
+ // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
+ buf = urb->transfer_buffer + urb->actual_length;
+ prefetchw(buf);
+ len = ep->maxpacket - sl811_read(sl811,
+ bank + SL11H_XFERCNTREG);
+ if (len > ep->length) {
+ len = ep->length;
+ urb->status = -EOVERFLOW;
+ }
+ urb->actual_length += len;
+ sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
+ buf, len);
+ usb_dotoggle(udev, ep->epnum, 0);
+ if (urb->actual_length == urb->transfer_buffer_length)
+ urbstat = 0;
+ else if (len < ep->maxpacket) {
+ if (urb->transfer_flags & URB_SHORT_NOT_OK)
+ urbstat = -EREMOTEIO;
+ else
+ urbstat = 0;
+ }
+ if (usb_pipecontrol(urb->pipe)
+ && (urbstat == -EREMOTEIO
+ || urbstat == 0)) {
+
+ /* NOTE if the status stage STALLs (why?),
+ * this reports the wrong urb status.
+ */
+ spin_lock(&urb->lock);
+ if (urb->status == -EINPROGRESS)
+ urb->status = urbstat;
+ spin_unlock(&urb->lock);
+
+ req = NULL;
+ ep->nextpid = USB_PID_ACK;
+ }
+ break;
+ case USB_PID_SETUP:
+ // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
+ 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:
+ // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
+ urbstat = 0;
+ break;
+ }
+
+ /* STALL stops all transfers */
+ } else if (status & SL11H_STATMASK_STALL) {
+ PACKET("...STALL_%02x qh%p\n", bank, ep);
+ ep->nak_count = ep->error_count = 0;
+ urbstat = -EPIPE;
+
+ /* error? retry, until "3 strikes" */
+ } else if (++ep->error_count >= 3) {
+ if (status & SL11H_STATMASK_TMOUT)
+ urbstat = -ETIMEDOUT;
+ else if (status & SL11H_STATMASK_OVF)
+ urbstat = -EOVERFLOW;
+ else
+ urbstat = -EPROTO;
+ ep->error_count = 0;
+ PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
+ bank, status, ep, urbstat);
+ }
+
+ if ((urbstat != -EINPROGRESS || urb->status != -EINPROGRESS)
+ && req)
+ finish_request(sl811, ep, req, regs, urbstat);
+}
+
+static inline u8 checkdone(struct sl811 *sl811)
+{
+ u8 ctl;
+ u8 irqstat = 0;
+
+ if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
+ ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
+ if (ctl & SL11H_HCTLMASK_ARM)
+ sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
+ DBG("%s DONE_A: ctrl %02x sts %02x\n",
+ (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
+ ctl,
+ sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
+ irqstat |= SL11H_INTMASK_DONE_A;
+ }
+#ifdef USE_B
+ if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
+ ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
+ if (ctl & SL11H_HCTLMASK_ARM)
+ sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
+ DBG("%s DONE_B: ctrl %02x sts %02x\n", ctl,
+ (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
+ ctl,
+ sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
+ irqstat |= SL11H_INTMASK_DONE_A;
+ }
+#endif
+ return irqstat;
+}
+
+static irqreturn_t sl811h_irq(int irq, void *_sl811, struct pt_regs *regs)
+{
+ struct sl811 *sl811 = _sl811;
+ u8 irqstat;
+ irqreturn_t ret = IRQ_NONE;
+ unsigned retries = 5;
+
+ spin_lock(&sl811->lock);
+
+retry:
+ irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
+ if (irqstat) {
+ sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
+ irqstat &= sl811->irq_enable;
+ }
+
+#ifdef QUIRK2
+ /* this may no longer be necessary ... */
+ if (irqstat == 0 && ret == IRQ_NONE) {
+ irqstat = checkdone(sl811);
+ if (irqstat && irq != ~0)
+ sl811->stat_lost++;
+ }
+#endif
+
+ /* USB packets, not necessarily handled in the order they're
+ * issued ... that's fine if they're different endpoints.
+ */
+ if (irqstat & SL11H_INTMASK_DONE_A) {
+ done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF), regs);
+ sl811->active_a = NULL;
+ sl811->stat_a++;
+ }
+#ifdef USE_B
+ if (irqstat & SL11H_INTMASK_DONE_B) {
+ done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF), regs);
+ sl811->active_b = NULL;
+ sl811->stat_b++;
+ }
+#endif
+ if (irqstat & SL11H_INTMASK_SOFINTR) {
+ unsigned index;
+
+ index = sl811->frame++ % (PERIODIC_SIZE - 1);
+ sl811->stat_sof++;
+
+ /* be graceful about almost-inevitable periodic schedule
+ * overruns: continue the previous frame's transfers iff
+ * this one has nothing scheduled.
+ */
+ if (sl811->next_periodic) {
+ // ERR("overrun to slot %d\n", index);
+ sl811->stat_overrun++;
+ }
+ if (sl811->periodic[index])
+ sl811->next_periodic = sl811->periodic[index];
+ }
+
+ /* khubd manages debouncing and wakeup */
+ if (irqstat & SL11H_INTMASK_INSRMV) {
+ sl811->stat_insrmv++;
+
+ /* most stats are reset for each VBUS session */
+ sl811->stat_wake = 0;
+ sl811->stat_sof = 0;
+ sl811->stat_a = 0;
+ sl811->stat_b = 0;
+ sl811->stat_lost = 0;
+
+ sl811->ctrl1 = 0;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+
+ sl811->irq_enable = SL11H_INTMASK_INSRMV;
+ sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
+
+ /* usbcore nukes other pending transactions on disconnect */
+ if (sl811->active_a) {
+ sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
+ finish_request(sl811, sl811->active_a,
+ container_of(sl811->active_a->queue.next,
+ struct sl811h_req, queue),
+ NULL, -ESHUTDOWN);
+ sl811->active_a = NULL;
+ }
+#ifdef USE_B
+ if (sl811->active_b) {
+ sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
+ finish_request(sl811, sl811->active_b,
+ container_of(sl811->active_b->queue.next,
+ struct sl811h_req, queue),
+ NULL, -ESHUTDOWN);
+ sl811->active_b = NULL;
+ }
+#endif
+
+ /* port status seems wierd until after reset, so
+ * force the reset and make khubd clean up later.
+ */
+ sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
+ | (1 << USB_PORT_FEAT_CONNECTION);
+
+ } else if (irqstat & SL11H_INTMASK_RD) {
+ if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
+ DBG("wakeup\n");
+ sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
+ sl811->stat_wake++;
+ } else
+ irqstat &= ~SL11H_INTMASK_RD;
+ }
+
+ if (irqstat) {
+ if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
+ start_transfer(sl811);
+ ret = IRQ_HANDLED;
+ sl811->hcd.saw_irq = 1;
+ if (retries--)
+ goto retry;
+ }
+
+ if (sl811->periodic_count == 0 && list_empty(&sl811->async))
+ sofirq_off(sl811);
+ sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
+
+ spin_unlock(&sl811->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.
+ */
+#define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
+
+static int balance(struct sl811 *sl811, 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 || sl811->load[branch] > sl811->load[i]) {
+ int j;
+
+ for (j = i; j < PERIODIC_SIZE; j += period) {
+ if ((sl811->load[j] + load)
+ > MAX_PERIODIC_LOAD)
+ break;
+ }
+ if (j < PERIODIC_SIZE)
+ continue;
+ branch = i;
+ }
+ }
+ return branch;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int sl811h_urb_enqueue(
+ struct usb_hcd *hcd,
+ struct urb *urb,
+ int mem_flags
+) {
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ struct usb_device *udev = urb->dev;
+ struct hcd_dev *hdev = (struct hcd_dev *) udev->hcpriv;
+ unsigned int pipe = urb->pipe;
+ int is_out = !usb_pipein(pipe);
+ int type = usb_pipetype(pipe);
+ int epnum = usb_pipeendpoint(pipe);
+ struct sl811h_ep *ep = NULL;
+ struct sl811h_req *req;
+ unsigned long flags;
+ int i;
+ int retval = 0;
+
+#ifdef DISABLE_ISO
+ if (type == PIPE_ISOCHRONOUS)
+ return -ENOSPC;
+#endif
+
+ /* avoid all allocations within spinlocks: request or endpoint */
+ urb->hcpriv = req = kmalloc(sizeof *req, mem_flags);
+ if (!req)
+ return -ENOMEM;
+ req->urb = urb;
+
+ i = epnum << 1;
+ if (i && is_out)
+ i |= 1;
+ if (!hdev->ep[i])
+ ep = kcalloc(1, sizeof *ep, mem_flags);
+
+ spin_lock_irqsave(&sl811->lock, flags);
+
+ /* don't submit to a dead or disabled port */
+ if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
+ || !HCD_IS_RUNNING(sl811->hcd.state)) {
+ retval = -ENODEV;
+ goto fail;
+ }
+
+ if (hdev->ep[i]) {
+ kfree(ep);
+ ep = hdev->ep[i];
+ } else if (!ep) {
+ retval = -ENOMEM;
+ goto fail;
+
+ } else {
+ INIT_LIST_HEAD(&ep->queue);
+ INIT_LIST_HEAD(&ep->schedule);
+ ep->udev = usb_get_dev(udev);
+ ep->epnum = epnum;
+ ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
+ ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
+ 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 (ep->maxpacket > H_MAXPACKET) {
+ /* iso packets up to 240 bytes could work... */
+ DBG("dev %d ep%d maxpacket %d\n",
+ udev->devnum, epnum, ep->maxpacket);
+ retval = -EINVAL;
+ goto fail;
+ }
+
+ if (udev->speed == USB_SPEED_LOW) {
+ /* send preamble for external hub? */
+ if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
+ ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
+ }
+ switch (type) {
+ case PIPE_ISOCHRONOUS:
+ case PIPE_INTERRUPT:
+ if (urb->interval > PERIODIC_SIZE)
+ urb->interval = PERIODIC_SIZE;
+ ep->period = urb->interval;
+ ep->branch = PERIODIC_SIZE;
+ if (type == PIPE_ISOCHRONOUS)
+ ep->defctrl |= SL11H_HCTLMASK_ISOCH;
+ ep->load = usb_calc_bus_time(udev->speed, !is_out,
+ (type == PIPE_ISOCHRONOUS),
+ usb_maxpacket(udev, pipe, is_out))
+ / 1000;
+ break;
+ }
+
+ hdev->ep[i] = ep;
+ }
+
+ /* maybe put endpoint into schedule */
+ switch (type) {
+ case PIPE_CONTROL:
+ case PIPE_BULK:
+ if (list_empty(&ep->schedule))
+ list_add_tail(&ep->schedule, &sl811->async);
+ break;
+ case PIPE_ISOCHRONOUS:
+ case PIPE_INTERRUPT:
+ urb->interval = ep->period;
+ if (ep->branch < PERIODIC_SIZE)
+ break;
+
+ retval = balance(sl811, ep->period, ep->load);
+ if (retval < 0)
+ goto fail;
+ ep->branch = retval;
+ retval = 0;
+ urb->start_frame = (sl811->frame & (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 sl811h_ep **prev = &sl811->periodic[i];
+ struct sl811h_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;
+ }
+ sl811->load[i] += ep->load;
+ }
+ sl811->periodic_count++;
+ hcd_to_bus(&sl811->hcd)->bandwidth_allocated
+ += ep->load / ep->period;
+ sofirq_on(sl811);
+ }
+
+ /* in case of unlink-during-submit */
+ spin_lock(&urb->lock);
+ if (urb->status != -EINPROGRESS) {
+ spin_unlock(&urb->lock);
+ finish_request(sl811, ep, req, NULL, 0);
+ req = NULL;
+ retval = 0;
+ goto fail;
+ }
+ list_add_tail(&req->queue, &ep->queue);
+ spin_unlock(&urb->lock);
+
+ start_transfer(sl811);
+ sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
+fail:
+ spin_unlock_irqrestore(&sl811->lock, flags);
+ if (retval)
+ kfree(req);
+ return retval;
+}
+
+static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ struct usb_device *udev = urb->dev;
+ struct hcd_dev *hdev = (struct hcd_dev *) udev->hcpriv;
+ unsigned int pipe = urb->pipe;
+ int is_out = !usb_pipein(pipe);
+ unsigned long flags;
+ unsigned i;
+ struct sl811h_ep *ep;
+ struct sl811h_req *req = urb->hcpriv;
+ int retval = 0;
+
+ i = usb_pipeendpoint(pipe) << 1;
+ if (i && is_out)
+ i |= 1;
+
+ spin_lock_irqsave(&sl811->lock, flags);
+ ep = hdev->ep[i];
+ if (ep) {
+ /* finish right away if this urb can't be active ...
+ * note that some drivers wrongly expect delays
+ */
+ if (ep->queue.next != &req->queue) {
+ /* not front of queue? never active */
+
+ /* for active transfers, we expect an IRQ */
+ } else if (sl811->active_a == ep) {
+ if (time_before_eq(sl811->jiffies_a, jiffies)) {
+ /* happens a lot with lowspeed?? */
+ DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
+ sl811_read(sl811,
+ SL811_EP_A(SL11H_HOSTCTLREG)),
+ sl811_read(sl811,
+ SL811_EP_A(SL11H_PKTSTATREG)));
+ sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
+ 0);
+ sl811->active_a = NULL;
+ } else
+ req = NULL;
+#ifdef USE_B
+ } else if (sl811->active_b == ep) {
+ if (time_before_eq(sl811->jiffies_a, jiffies)) {
+ /* happens a lot with lowspeed?? */
+ DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
+ sl811_read(sl811,
+ SL811_EP_B(SL11H_HOSTCTLREG)),
+ sl811_read(sl811,
+ SL811_EP_B(SL11H_PKTSTATREG)));
+ sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
+ 0);
+ sl811->active_b = NULL;
+ } else
+ req = NULL;
+#endif
+ } else {
+ /* front of queue for inactive endpoint */
+ }
+
+ if (req)
+ finish_request(sl811, ep, req, NULL, 0);
+ else
+ VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
+ (sl811->active_a == ep) ? "A" : "B");
+ } else
+ retval = -EINVAL;
+ spin_unlock_irqrestore(&sl811->lock, flags);
+ return retval;
+}
+
+static void
+sl811h_endpoint_disable(struct usb_hcd *hcd, struct hcd_dev *hdev, int epnum)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ struct sl811h_ep *ep;
+ unsigned long flags;
+ int i;
+
+ i = (epnum & 0xf) << 1;
+ if (epnum && !(epnum & USB_DIR_IN))
+ i |= 1;
+
+ spin_lock_irqsave(&sl811->lock, flags);
+ ep = hdev->ep[i];
+ hdev->ep[i] = NULL;
+ spin_unlock_irqrestore(&sl811->lock, flags);
+
+ if (ep) {
+ /* assume we'd just wait for the irq */
+ if (!list_empty(&ep->queue))
+ msleep(3);
+ if (!list_empty(&ep->queue))
+ WARN("ep %p not empty?\n", ep);
+
+ usb_put_dev(ep->udev);
+ kfree(ep);
+ }
+ return;
+}
+
+static int
+sl811h_get_frame(struct usb_hcd *hcd)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+
+ /* wrong except while periodic transfers are scheduled;
+ * never matches the on-the-wire frame;
+ * subject to overruns.
+ */
+ return sl811->frame;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* the virtual root hub timer IRQ checks for hub status */
+static int
+sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+#ifdef QUIRK3
+ unsigned long flags;
+
+ /* non-SMP HACK: use root hub timer as i/o watchdog
+ * this seems essential when SOF IRQs aren't in use...
+ */
+ local_irq_save(flags);
+ if (!timer_pending(&sl811->timer)) {
+ if (sl811h_irq(~0, sl811, NULL) != IRQ_NONE)
+ sl811->stat_lost++;
+ }
+ local_irq_restore(flags);
+#endif
+
+ if (!(sl811->port1 & (0xffff << 16)))
+ return 0;
+
+ /* tell khubd port 1 changed */
+ *buf = (1 << 1);
+ return 1;
+}
+
+static void
+sl811h_hub_descriptor (
+ struct sl811 *sl811,
+ struct usb_hub_descriptor *desc
+) {
+ u16 temp = 0;
+
+ desc->bDescriptorType = 0x29;
+ desc->bHubContrCurrent = 0;
+
+ desc->bNbrPorts = 1;
+ desc->bDescLength = 9;
+
+ /* per-port power switching (gang of one!), or none */
+ desc->bPwrOn2PwrGood = 0;
+ if (sl811->board && sl811->board->port_power) {
+ desc->bPwrOn2PwrGood = sl811->board->potpg;
+ if (!desc->bPwrOn2PwrGood)
+ desc->bPwrOn2PwrGood = 10;
+ temp = 0x0001;
+ } else
+ temp = 0x0002;
+
+ /* no overcurrent errors detection/handling */
+ temp |= 0x0010;
+
+ desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
+
+ /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
+ desc->bitmap[0] = 1 << 1;
+ desc->bitmap[1] = ~0;
+}
+
+static void
+sl811h_timer(unsigned long _sl811)
+{
+ struct sl811 *sl811 = (void *) _sl811;
+ unsigned long flags;
+ u8 irqstat;
+ u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
+ const u32 mask = (1 << USB_PORT_FEAT_CONNECTION)
+ | (1 << USB_PORT_FEAT_ENABLE)
+ | (1 << USB_PORT_FEAT_LOWSPEED);
+
+ spin_lock_irqsave(&sl811->lock, flags);
+
+ /* stop special signaling */
+ sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+ udelay(3);
+
+ irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
+
+ switch (signaling) {
+ case SL11H_CTL1MASK_SE0:
+ DBG("end reset\n");
+ sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
+ | (1 << USB_PORT_FEAT_POWER);
+ sl811->ctrl1 = 0;
+ /* don't wrongly ack RD */
+ if (irqstat & SL11H_INTMASK_INSRMV)
+ irqstat &= ~SL11H_INTMASK_RD;
+ break;
+ case SL11H_CTL1MASK_K:
+ DBG("end resume\n");
+ sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
+ break;
+ default:
+ DBG("odd timer signaling: %02x\n", signaling);
+ break;
+ }
+ sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
+
+ if (irqstat & SL11H_INTMASK_RD) {
+ /* usbcore nukes all pending transactions on disconnect */
+ if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
+ sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
+ | (1 << USB_PORT_FEAT_C_ENABLE);
+ sl811->port1 &= ~mask;
+ sl811->irq_enable = SL11H_INTMASK_INSRMV;
+ } else {
+ sl811->port1 |= mask;
+ if (irqstat & SL11H_INTMASK_DP)
+ sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
+ sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
+ }
+
+ if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
+ u8 ctrl2 = SL811HS_CTL2_INIT;
+
+ sl811->irq_enable |= SL11H_INTMASK_DONE_A;
+#ifdef USE_B
+ sl811->irq_enable |= SL11H_INTMASK_DONE_B;
+#endif
+ if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
+ sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
+ ctrl2 |= SL811HS_CTL2MASK_DSWAP;
+ }
+
+ /* start SOFs flowing, kickstarting with A registers */
+ sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
+ sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
+ sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
+
+ /* autoincrementing */
+ sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
+ writeb(SL_SOF, sl811->data_reg);
+ writeb(0, sl811->data_reg);
+ sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
+ SL11H_HCTLMASK_ARM);
+
+ /* khubd provides debounce delay */
+ } else {
+ sl811->ctrl1 = 0;
+ }
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+
+ /* reenable irqs */
+ sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
+ spin_unlock_irqrestore(&sl811->lock, flags);
+}
+
+static int
+sl811h_hub_control(
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength
+) {
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ int retval = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sl811->lock, flags);
+
+ switch (typeReq) {
+ case ClearHubFeature:
+ case SetHubFeature:
+ switch (wValue) {
+ case C_HUB_OVER_CURRENT:
+ case C_HUB_LOCAL_POWER:
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case ClearPortFeature:
+ if (wIndex != 1 || wLength != 0)
+ goto error;
+
+ switch (wValue) {
+ case USB_PORT_FEAT_ENABLE:
+ sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
+ sl811->ctrl1 = 0;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+ sl811->irq_enable = SL11H_INTMASK_INSRMV;
+ sl811_write(sl811, SL11H_IRQ_ENABLE,
+ sl811->irq_enable);
+ break;
+ case USB_PORT_FEAT_SUSPEND:
+ if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
+ break;
+
+ /* 20 msec of resume/K signaling, other irqs blocked */
+ DBG("start resume...\n");
+ sl811->irq_enable = 0;
+ sl811_write(sl811, SL11H_IRQ_ENABLE,
+ sl811->irq_enable);
+ sl811->ctrl1 |= SL11H_CTL1MASK_K;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+
+ mod_timer(&sl811->timer, jiffies
+ + msecs_to_jiffies(20));
+ break;
+ case USB_PORT_FEAT_POWER:
+ port_power(sl811, 0);
+ break;
+ case USB_PORT_FEAT_C_ENABLE:
+ case USB_PORT_FEAT_C_SUSPEND:
+ case USB_PORT_FEAT_C_CONNECTION:
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ case USB_PORT_FEAT_C_RESET:
+ break;
+ default:
+ goto error;
+ }
+ sl811->port1 &= ~(1 << wValue);
+ break;
+ case GetHubDescriptor:
+ sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
+ break;
+ case GetHubStatus:
+ *(__le32 *) buf = cpu_to_le32(0);
+ break;
+ case GetPortStatus:
+ if (wIndex != 1)
+ goto error;
+ *(__le32 *) buf = cpu_to_le32(sl811->port1);
+
+#ifndef VERBOSE
+ if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
+#endif
+ DBG("GetPortStatus %08x\n", sl811->port1);
+ break;
+ case SetPortFeature:
+ if (wIndex != 1 || wLength != 0)
+ goto error;
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
+ goto error;
+ if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
+ goto error;
+
+ DBG("suspend...\n");
+ sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+ break;
+ case USB_PORT_FEAT_POWER:
+ port_power(sl811, 1);
+ break;
+ case USB_PORT_FEAT_RESET:
+ if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
+ goto error;
+ if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
+ break;
+
+ /* 50 msec of reset/SE0 signaling, irqs blocked */
+ sl811->irq_enable = 0;
+ sl811_write(sl811, SL11H_IRQ_ENABLE,
+ sl811->irq_enable);
+ sl811->ctrl1 = SL11H_CTL1MASK_SE0;
+ sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
+ sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
+ mod_timer(&sl811->timer, jiffies
+ + msecs_to_jiffies(50));
+ break;
+ default:
+ goto error;
+ }
+ sl811->port1 |= 1 << wValue;
+ break;
+
+ default:
+error:
+ /* "protocol stall" on error */
+ retval = -EPIPE;
+ }
+
+ spin_unlock_irqrestore(&sl811->lock, flags);
+ return retval;
+}
+
+#ifdef CONFIG_PM
+
+static int
+sl811h_hub_suspend(struct usb_hcd *hcd)
+{
+ // SOFs off
+ DBG("%s\n", __FUNCTION__);
+ return 0;
+}
+
+static int
+sl811h_hub_resume(struct usb_hcd *hcd)
+{
+ // SOFs on
+ DBG("%s\n", __FUNCTION__);
+ return 0;
+}
+
+#else
+
+#define sl811h_hub_suspend NULL
+#define sl811h_hub_resume NULL
+
+#endif
+
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef STUB_DEBUG_FILE
+
+static inline void create_debug_file(struct sl811 *sl811) { }
+static inline void remove_debug_file(struct sl811 *sl811) { }
+
+#else
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static void dump_irq(struct seq_file *s, char *label, u8 mask)
+{
+ seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
+ (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
+ (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
+ (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
+ (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
+ (mask & SL11H_INTMASK_RD) ? " rd" : "",
+ (mask & SL11H_INTMASK_DP) ? " dp" : "");
+}
+
+static int proc_sl811h_show(struct seq_file *s, void *unused)
+{
+ struct sl811 *sl811 = s->private;
+ struct sl811h_ep *ep;
+ unsigned i;
+
+ seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
+ sl811->hcd.product_desc,
+ hcd_name, DRIVER_VERSION,
+ sl811->port1);
+
+ seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
+ seq_printf(s, "current session: done_a %ld done_b %ld "
+ "wake %ld sof %ld overrun %ld lost %ld\n\n",
+ sl811->stat_a, sl811->stat_b,
+ sl811->stat_wake, sl811->stat_sof,
+ sl811->stat_overrun, sl811->stat_lost);
+
+ spin_lock_irq(&sl811->lock);
+
+ if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
+ seq_printf(s, "(suspended)\n\n");
+ else {
+ u8 t = sl811_read(sl811, SL11H_CTLREG1);
+
+ seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
+ (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
+ ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
+ case SL11H_CTL1MASK_NORMAL: s = ""; break;
+ case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
+ case SL11H_CTL1MASK_K: s = " k/resume"; break;
+ default: s = "j"; break;
+ }; s; }),
+ (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
+ (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
+
+ dump_irq(s, "irq_enable",
+ sl811_read(sl811, SL11H_IRQ_ENABLE));
+ dump_irq(s, "irq_status",
+ sl811_read(sl811, SL11H_IRQ_STATUS));
+ seq_printf(s, "frame clocks remaining: %d\n",
+ sl811_read(sl811, SL11H_SOFTMRREG) << 6);
+ }
+
+ seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
+ sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
+ sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
+ seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
+ sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
+ sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
+ seq_printf(s, "\n");
+ list_for_each_entry (ep, &sl811->async, schedule) {
+ struct sl811h_req *req;
+
+ seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
+ " nak %d err %d\n",
+ (ep == sl811->active_a) ? "(A) " : "",
+ (ep == sl811->active_b) ? "(B) " : "",
+ ep, ep->epnum,
+ ({ char *s; switch (ep->nextpid) {
+ case USB_PID_IN: s = "in"; break;
+ case USB_PID_OUT: s = "out"; break;
+ case USB_PID_SETUP: s = "setup"; break;
+ case USB_PID_ACK: s = "status"; break;
+ default: s = "?"; break;
+ }; s;}),
+ ep->maxpacket,
+ ep->nak_count, ep->error_count);
+ list_for_each_entry (req, &ep->queue, queue) {
+ seq_printf(s, " urb%p, %d/%d\n", req->urb,
+ req->urb->actual_length,
+ req->urb->transfer_buffer_length);
+ }
+ }
+ if (!list_empty(&sl811->async))
+ seq_printf(s, "\n");
+
+ seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
+
+ for (i = 0; i < PERIODIC_SIZE; i++) {
+ ep = sl811->periodic[i];
+ if (!ep)
+ continue;
+ seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
+
+ /* DUMB: prints shared entries multiple times */
+ do {
+ seq_printf(s,
+ " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
+ "err %d\n",
+ (ep == sl811->active_a) ? "(A) " : "",
+ (ep == sl811->active_b) ? "(B) " : "",
+ 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->error_count);
+ ep = ep->next;
+ } while (ep);
+ }
+
+ spin_unlock_irq(&sl811->lock);
+ seq_printf(s, "\n");
+
+ return 0;
+}
+
+static int proc_sl811h_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, proc_sl811h_show, PDE(inode)->data);
+}
+
+static struct file_operations proc_ops = {
+ .open = proc_sl811h_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/* expect just one sl811 per system */
+static const char proc_filename[] = "driver/sl811h";
+
+static void create_debug_file(struct sl811 *sl811)
+{
+ struct proc_dir_entry *pde;
+
+ pde = create_proc_entry(proc_filename, 0, NULL);
+ if (pde == NULL)
+ return;
+
+ pde->proc_fops = &proc_ops;
+ pde->data = sl811;
+ sl811->pde = pde;
+}
+
+static void remove_debug_file(struct sl811 *sl811)
+{
+ if (sl811->pde)
+ remove_proc_entry(proc_filename, NULL);
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static void
+sl811h_stop(struct usb_hcd *hcd)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ unsigned long flags;
+
+ del_timer_sync(&sl811->hcd.rh_timer);
+
+ spin_lock_irqsave(&sl811->lock, flags);
+ port_power(sl811, 0);
+ spin_unlock_irqrestore(&sl811->lock, flags);
+}
+
+static int
+sl811h_start(struct usb_hcd *hcd)
+{
+ struct sl811 *sl811 = hcd_to_sl811(hcd);
+ struct usb_device *udev;
+
+ /* chip has been reset, VBUS power is off */
+
+ udev = usb_alloc_dev(NULL, &sl811->hcd.self, 0);
+ if (!udev)
+ return -ENOMEM;
+
+ udev->speed = USB_SPEED_FULL;
+ hcd->state = USB_STATE_RUNNING;
+
+ if (sl811->board)
+ sl811->hcd.can_wakeup = sl811->board->can_wakeup;
+
+ if (hcd_register_root(udev, &sl811->hcd) != 0) {
+ usb_put_dev(udev);
+ sl811h_stop(hcd);
+ return -ENODEV;
+ }
+
+ if (sl811->board && sl811->board->power)
+ hub_set_power_budget(udev, sl811->board->power * 2);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct hc_driver sl811h_hc_driver = {
+ .description = hcd_name,
+
+ /*
+ * generic hardware linkage
+ */
+ .flags = HCD_USB11,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = sl811h_urb_enqueue,
+ .urb_dequeue = sl811h_urb_dequeue,
+ .endpoint_disable = sl811h_endpoint_disable,
+
+ /*
+ * periodic schedule support
+ */
+ .get_frame_number = sl811h_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = sl811h_hub_status_data,
+ .hub_control = sl811h_hub_control,
+ .hub_suspend = sl811h_hub_suspend,
+ .hub_resume = sl811h_hub_resume,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int __init_or_module
+sl811h_remove(struct device *dev)
+{
+ struct sl811 *sl811 = dev_get_drvdata(dev);
+ struct platform_device *pdev;
+ struct resource *res;
+
+ pdev = container_of(dev, struct platform_device, dev);
+
+ if (HCD_IS_RUNNING(sl811->hcd.state))
+ sl811->hcd.state = USB_STATE_QUIESCING;
+
+ usb_disconnect(&sl811->hcd.self.root_hub);
+ remove_debug_file(sl811);
+ sl811h_stop(&sl811->hcd);
+
+ if (!list_empty(&sl811->hcd.self.bus_list))
+ usb_deregister_bus(&sl811->hcd.self);
+
+ if (sl811->hcd.irq >= 0)
+ free_irq(sl811->hcd.irq, sl811);
+
+ if (sl811->data_reg)
+ iounmap(sl811->data_reg);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ release_mem_region(res->start, 1);
+
+ if (sl811->addr_reg)
+ iounmap(sl811->addr_reg);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, 1);
+
+ kfree(sl811);
+ return 0;
+}
+
+#define resource_len(r) (((r)->end - (r)->start) + 1)
+
+static int __init
+sl811h_probe(struct device *dev)
+{
+ struct sl811 *sl811;
+ struct platform_device *pdev;
+ struct resource *addr, *data;
+ int irq;
+ int status;
+ u8 tmp;
+ unsigned long flags;
+
+ /* basic sanity checks first. board-specific init logic should
+ * have initialized these three resources and probably board
+ * specific platform_data. we don't probe for IRQs, and do only
+ * minimal sanity checking.
+ */
+ pdev = container_of(dev, struct platform_device, dev);
+ if (pdev->num_resources < 3)
+ return -ENODEV;
+
+ addr = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ data = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ irq = platform_get_irq(pdev, 0);
+ if (!addr || !data || irq < 0)
+ return -ENODEV;
+
+ /* refuse to confuse usbcore */
+ if (dev->dma_mask) {
+ DBG("no we won't dma\n");
+ return -EINVAL;
+ }
+
+ if (!request_mem_region(addr->start, 1, hcd_name))
+ return -EBUSY;
+ if (!request_mem_region(data->start, 1, hcd_name)) {
+ release_mem_region(addr->start, 1);
+ return -EBUSY;
+ }
+
+ /* allocate and initialize hcd */
+ sl811 = kcalloc(1, sizeof *sl811, GFP_KERNEL);
+ if (!sl811)
+ return 0;
+ dev_set_drvdata(dev, sl811);
+
+ usb_bus_init(&sl811->hcd.self);
+ sl811->hcd.self.controller = dev;
+ sl811->hcd.self.bus_name = dev->bus_id;
+ sl811->hcd.self.op = &usb_hcd_operations;
+ sl811->hcd.self.hcpriv = sl811;
+
+ // NOTE: 2.6.11 starts to change the hcd glue layer some more,
+ // eventually letting us eliminate struct sl811h_req and a
+ // lot of the boilerplate code here
+
+ INIT_LIST_HEAD(&sl811->hcd.dev_list);
+ sl811->hcd.self.release = &usb_hcd_release;
+
+ sl811->hcd.description = sl811h_hc_driver.description;
+ init_timer(&sl811->hcd.rh_timer);
+ sl811->hcd.driver = &sl811h_hc_driver;
+ sl811->hcd.irq = -1;
+ sl811->hcd.state = USB_STATE_HALT;
+
+ spin_lock_init(&sl811->lock);
+ INIT_LIST_HEAD(&sl811->async);
+ sl811->board = dev->platform_data;
+ init_timer(&sl811->timer);
+ sl811->timer.function = sl811h_timer;
+ sl811->timer.data = (unsigned long) sl811;
+
+ sl811->addr_reg = ioremap(addr->start, resource_len(addr));
+ if (sl811->addr_reg == NULL) {
+ status = -ENOMEM;
+ goto fail;
+ }
+ sl811->data_reg = ioremap(data->start, resource_len(addr));
+ if (sl811->data_reg == NULL) {
+ status = -ENOMEM;
+ goto fail;
+ }
+
+ spin_lock_irqsave(&sl811->lock, flags);
+ port_power(sl811, 0);
+ spin_unlock_irqrestore(&sl811->lock, flags);
+ msleep(200);
+
+ tmp = sl811_read(sl811, SL11H_HWREVREG);
+ switch (tmp >> 4) {
+ case 1:
+ sl811->hcd.product_desc = "SL811HS v1.2";
+ break;
+ case 2:
+ sl811->hcd.product_desc = "SL811HS v1.5";
+ break;
+ default:
+ /* reject case 0, SL11S is less functional */
+ DBG("chiprev %02x\n", tmp);
+ status = -ENXIO;
+ goto fail;
+ }
+
+ /* sl811s would need a different handler for this irq */
+#ifdef CONFIG_ARM
+ /* Cypress docs say the IRQ is IRQT_HIGH ... */
+ set_irq_type(irq, IRQT_RISING);
+#endif
+ status = request_irq(irq, sl811h_irq, SA_INTERRUPT, hcd_name, sl811);
+ if (status < 0)
+ goto fail;
+ sl811->hcd.irq = irq;
+
+ INFO("%s, irq %d\n", sl811->hcd.product_desc, irq);
+
+ status = usb_register_bus(&sl811->hcd.self);
+ if (status < 0)
+ goto fail;
+ status = sl811h_start(&sl811->hcd);
+ if (status == 0) {
+ create_debug_file(sl811);
+ return 0;
+ }
+fail:
+ sl811h_remove(dev);
+ DBG("init error, %d\n", status);
+ return status;
+}
+
+#ifdef CONFIG_PM
+
+/* for this device there's no useful distinction between the controller
+ * and its root hub, except that the root hub only gets direct PM calls
+ * when CONFIG_USB_SUSPEND is enabled.
+ */
+
+static int
+sl811h_suspend(struct device *dev, u32 state, u32 phase)
+{
+ struct sl811 *sl811 = dev_get_drvdata(dev);
+ int retval = 0;
+
+ if (phase != SUSPEND_POWER_DOWN)
+ return retval;
+
+ if (state <= PM_SUSPEND_MEM)
+ retval = sl811h_hub_suspend(&sl811->hcd);
+ else
+ port_power(sl811, 0);
+ if (retval == 0)
+ dev->power.power_state = state;
+ return retval;
+}
+
+static int
+sl811h_resume(struct device *dev, u32 phase)
+{
+ struct sl811 *sl811 = dev_get_drvdata(dev);
+
+ if (phase != RESUME_POWER_ON)
+ return 0;
+
+ /* with no "check to see if VBUS is still powered" board hook,
+ * let's assume it'd only be powered to enable remote wakeup.
+ */
+ if (dev->power.power_state > PM_SUSPEND_MEM
+ || !sl811->hcd.can_wakeup) {
+ sl811->port1 = 0;
+ port_power(sl811, 1);
+ return 0;
+ }
+
+ dev->power.power_state = PM_SUSPEND_ON;
+ return sl811h_hub_resume(&sl811->hcd);
+}
+
+#else
+
+#define sl811h_suspend NULL
+#define sl811h_resume NULL
+
+#endif
+
+
+static struct device_driver sl811h_driver = {
+ .name = (char *) hcd_name,
+ .bus = &platform_bus_type,
+
+ .probe = sl811h_probe,
+ .remove = sl811h_remove,
+
+ .suspend = sl811h_suspend,
+ .resume = sl811h_resume,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int __init sl811h_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
+ return driver_register(&sl811h_driver);
+}
+module_init(sl811h_init);
+
+static void __exit sl811h_cleanup(void)
+{
+ driver_unregister(&sl811h_driver);
+}
+module_exit(sl811h_cleanup);
git://git.onelab.eu / linux-2.6.git / blobdiff