diff options
Diffstat (limited to 'drivers/usb/host/isp1760-hcd.c')
| -rw-r--r-- | drivers/usb/host/isp1760-hcd.c | 1312 |
1 files changed, 647 insertions, 665 deletions
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c index b38cfe98f22..dd98a966b58 100644 --- a/drivers/usb/host/isp1760-hcd.c +++ b/drivers/usb/host/isp1760-hcd.c @@ -8,6 +8,8 @@ * * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> * + * (c) 2011 Arvid Brodin <arvid.brodin@enea.com> + * */ #include <linux/module.h> #include <linux/kernel.h> @@ -26,14 +28,16 @@ static struct kmem_cache *qtd_cachep; static struct kmem_cache *qh_cachep; +static struct kmem_cache *urb_listitem_cachep; struct isp1760_hcd { u32 hcs_params; spinlock_t lock; - struct inter_packet_info atl_ints[32]; - struct inter_packet_info int_ints[32]; + struct slotinfo atl_slots[32]; + struct slotinfo int_slots[32]; struct memory_chunk memory_pool[BLOCKS]; - u32 atl_queued; + struct list_head controlqhs, bulkqhs, interruptqhs; + int active_ptds; /* periodic schedule support */ #define DEFAULT_I_TDPS 1024 @@ -85,18 +89,34 @@ struct isp1760_qtd { struct list_head qtd_list; struct urb *urb; size_t length; - - /* isp special*/ + size_t actual_length; + + /* QTD_ENQUEUED: waiting for transfer (inactive) */ + /* QTD_PAYLOAD_ALLOC: chip mem has been allocated for payload */ + /* QTD_XFER_STARTED: valid ptd has been written to isp176x - only + interrupt handler may touch this qtd! */ + /* QTD_XFER_COMPLETE: payload has been transferred successfully */ + /* QTD_RETIRE: transfer error/abort qtd */ +#define QTD_ENQUEUED 0 +#define QTD_PAYLOAD_ALLOC 1 +#define QTD_XFER_STARTED 2 +#define QTD_XFER_COMPLETE 3 +#define QTD_RETIRE 4 u32 status; -#define URB_ENQUEUED (1 << 1) }; +/* Queue head, one for each active endpoint */ struct isp1760_qh { - /* first part defined by EHCI spec */ + struct list_head qh_list; struct list_head qtd_list; - u32 toggle; u32 ping; + int slot; +}; + +struct urb_listitem { + struct list_head urb_list; + struct urb *urb; }; /* @@ -293,19 +313,6 @@ static void alloc_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) return; } } - - dev_err(hcd->self.controller, - "%s: Cannot allocate %zu bytes of memory\n" - "Current memory map:\n", - __func__, qtd->length); - for (i = 0; i < BLOCKS; i++) { - dev_err(hcd->self.controller, "Pool %2d size %4d status: %d\n", - i, priv->memory_pool[i].size, - priv->memory_pool[i].free); - } - /* XXX maybe -ENOMEM could be possible */ - BUG(); - return; } static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) @@ -327,15 +334,8 @@ static void free_mem(struct usb_hcd *hcd, struct isp1760_qtd *qtd) dev_err(hcd->self.controller, "%s: Invalid pointer: %08x\n", __func__, qtd->payload_addr); - BUG(); -} - -static void isp1760_init_regs(struct usb_hcd *hcd) -{ - reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); - reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + WARN_ON(1); + qtd->payload_addr = 0; } static int handshake(struct usb_hcd *hcd, u32 reg, @@ -373,31 +373,27 @@ static int ehci_reset(struct usb_hcd *hcd) return retval; } -static void qh_destroy(struct isp1760_qh *qh) -{ - WARN_ON(!list_empty(&qh->qtd_list)); - kmem_cache_free(qh_cachep, qh); -} - -static struct isp1760_qh *isp1760_qh_alloc(gfp_t flags) +static struct isp1760_qh *qh_alloc(gfp_t flags) { struct isp1760_qh *qh; qh = kmem_cache_zalloc(qh_cachep, flags); if (!qh) - return qh; + return NULL; + INIT_LIST_HEAD(&qh->qh_list); INIT_LIST_HEAD(&qh->qtd_list); + qh->slot = -1; + return qh; } -/* magic numbers that can affect system performance */ -#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ -#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ -#define EHCI_TUNE_RL_TT 0 -#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ -#define EHCI_TUNE_MULT_TT 1 -#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ +static void qh_free(struct isp1760_qh *qh) +{ + WARN_ON(!list_empty(&qh->qtd_list)); + WARN_ON(qh->slot > -1); + kmem_cache_free(qh_cachep, qh); +} /* one-time init, only for memory state */ static int priv_init(struct usb_hcd *hcd) @@ -407,6 +403,10 @@ static int priv_init(struct usb_hcd *hcd) spin_lock_init(&priv->lock); + INIT_LIST_HEAD(&priv->interruptqhs); + INIT_LIST_HEAD(&priv->controlqhs); + INIT_LIST_HEAD(&priv->bulkqhs); + /* * hw default: 1K periodic list heads, one per frame. * periodic_size can shrink by USBCMD update if hcc_params allows. @@ -464,7 +464,10 @@ static int isp1760_hc_setup(struct usb_hcd *hcd) } /* pre reset */ - isp1760_init_regs(hcd); + reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, 0); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); + reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, NO_TRANSFER_ACTIVE); /* reset */ reg_write32(hcd->regs, HC_RESET_REG, SW_RESET_RESET_ALL); @@ -484,12 +487,15 @@ static int isp1760_hc_setup(struct usb_hcd *hcd) 16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ? "analog" : "digital"); + /* This is weird: at the first plug-in of a device there seems to be + one packet queued that never gets returned? */ + priv->active_ptds = -1; + /* ATL reset */ reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode | ALL_ATX_RESET); mdelay(10); reg_write32(hcd->regs, HC_HW_MODE_CTRL, hwmode); - reg_write32(hcd->regs, HC_INTERRUPT_REG, INTERRUPT_ENABLE_MASK); reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, INTERRUPT_ENABLE_MASK); /* @@ -513,6 +519,10 @@ static void isp1760_init_maps(struct usb_hcd *hcd) reg_write32(hcd->regs, HC_INT_PTD_LASTPTD_REG, 0x80000000); reg_write32(hcd->regs, HC_ISO_PTD_LASTPTD_REG, 0x00000001); + reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, 0); + reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, 0); + reg_write32(hcd->regs, HC_ISO_PTD_SKIPMAP_REG, 0); + reg_write32(hcd->regs, HC_BUFFER_STATUS_REG, ATL_BUF_FILL | INT_BUF_FILL); } @@ -547,8 +557,7 @@ static int isp1760_run(struct usb_hcd *hcd) command |= CMD_RUN; reg_write32(hcd->regs, HC_USBCMD, command); - retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, - 250 * 1000); + retval = handshake(hcd, HC_USBCMD, CMD_RUN, CMD_RUN, 250 * 1000); if (retval) return retval; @@ -597,12 +606,19 @@ static int last_qtd_of_urb(struct isp1760_qtd *qtd, struct isp1760_qh *qh) return (qtd->urb != urb); } -static void transform_into_atl(struct isp1760_qh *qh, +/* magic numbers that can affect system performance */ +#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ +#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ +#define EHCI_TUNE_RL_TT 0 +#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ +#define EHCI_TUNE_MULT_TT 1 +#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ + +static void create_ptd_atl(struct isp1760_qh *qh, struct isp1760_qtd *qtd, struct ptd *ptd) { u32 maxpacket; u32 multi; - u32 pid_code; u32 rl = RL_COUNTER; u32 nak = NAK_COUNTER; @@ -615,67 +631,62 @@ static void transform_into_atl(struct isp1760_qh *qh, maxpacket &= 0x7ff; /* DW0 */ - ptd->dw0 = PTD_VALID; - ptd->dw0 |= PTD_LENGTH(qtd->length); - ptd->dw0 |= PTD_MAXPACKET(maxpacket); - ptd->dw0 |= PTD_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); + ptd->dw0 = DW0_VALID_BIT; + ptd->dw0 |= TO_DW0_LENGTH(qtd->length); + ptd->dw0 |= TO_DW0_MAXPACKET(maxpacket); + ptd->dw0 |= TO_DW0_ENDPOINT(usb_pipeendpoint(qtd->urb->pipe)); /* DW1 */ ptd->dw1 = usb_pipeendpoint(qtd->urb->pipe) >> 1; - ptd->dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); - - pid_code = qtd->packet_type; - ptd->dw1 |= PTD_PID_TOKEN(pid_code); + ptd->dw1 |= TO_DW1_DEVICE_ADDR(usb_pipedevice(qtd->urb->pipe)); + ptd->dw1 |= TO_DW1_PID_TOKEN(qtd->packet_type); if (usb_pipebulk(qtd->urb->pipe)) - ptd->dw1 |= PTD_TRANS_BULK; + ptd->dw1 |= DW1_TRANS_BULK; else if (usb_pipeint(qtd->urb->pipe)) - ptd->dw1 |= PTD_TRANS_INT; + ptd->dw1 |= DW1_TRANS_INT; if (qtd->urb->dev->speed != USB_SPEED_HIGH) { /* split transaction */ - ptd->dw1 |= PTD_TRANS_SPLIT; + ptd->dw1 |= DW1_TRANS_SPLIT; if (qtd->urb->dev->speed == USB_SPEED_LOW) - ptd->dw1 |= PTD_SE_USB_LOSPEED; + ptd->dw1 |= DW1_SE_USB_LOSPEED; - ptd->dw1 |= PTD_PORT_NUM(qtd->urb->dev->ttport); - ptd->dw1 |= PTD_HUB_NUM(qtd->urb->dev->tt->hub->devnum); + ptd->dw1 |= TO_DW1_PORT_NUM(qtd->urb->dev->ttport); + ptd->dw1 |= TO_DW1_HUB_NUM(qtd->urb->dev->tt->hub->devnum); /* SE bit for Split INT transfers */ if (usb_pipeint(qtd->urb->pipe) && (qtd->urb->dev->speed == USB_SPEED_LOW)) ptd->dw1 |= 2 << 16; - ptd->dw3 = 0; rl = 0; nak = 0; } else { - ptd->dw0 |= PTD_MULTI(multi); + ptd->dw0 |= TO_DW0_MULTI(multi); if (usb_pipecontrol(qtd->urb->pipe) || usb_pipebulk(qtd->urb->pipe)) - ptd->dw3 = qh->ping; - else - ptd->dw3 = 0; + ptd->dw3 |= TO_DW3_PING(qh->ping); } /* DW2 */ ptd->dw2 = 0; - ptd->dw2 |= PTD_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); - ptd->dw2 |= PTD_RL_CNT(rl); - ptd->dw3 |= PTD_NAC_CNT(nak); + ptd->dw2 |= TO_DW2_DATA_START_ADDR(base_to_chip(qtd->payload_addr)); + ptd->dw2 |= TO_DW2_RL(rl); /* DW3 */ - ptd->dw3 |= qh->toggle; + ptd->dw3 |= TO_DW3_NAKCOUNT(nak); + ptd->dw3 |= TO_DW3_DATA_TOGGLE(qh->toggle); if (usb_pipecontrol(qtd->urb->pipe)) { if (qtd->data_buffer == qtd->urb->setup_packet) - ptd->dw3 &= ~PTD_DATA_TOGGLE(1); + ptd->dw3 &= ~TO_DW3_DATA_TOGGLE(1); else if (last_qtd_of_urb(qtd, qh)) - ptd->dw3 |= PTD_DATA_TOGGLE(1); + ptd->dw3 |= TO_DW3_DATA_TOGGLE(1); } - ptd->dw3 |= PTD_ACTIVE; + ptd->dw3 |= DW3_ACTIVE_BIT; /* Cerr */ - ptd->dw3 |= PTD_CERR(ERR_COUNTER); + ptd->dw3 |= TO_DW3_CERR(ERR_COUNTER); } static void transform_add_int(struct isp1760_qh *qh, @@ -730,162 +741,13 @@ static void transform_add_int(struct isp1760_qh *qh, ptd->dw4 = usof; } -static void transform_into_int(struct isp1760_qh *qh, +static void create_ptd_int(struct isp1760_qh *qh, struct isp1760_qtd *qtd, struct ptd *ptd) { - transform_into_atl(qh, qtd, ptd); + create_ptd_atl(qh, qtd, ptd); transform_add_int(qh, qtd, ptd); } -static int check_error(struct usb_hcd *hcd, struct ptd *ptd) -{ - int error = 0; - - if (ptd->dw3 & DW3_HALT_BIT) { - error = -EPIPE; - - if (ptd->dw3 & DW3_ERROR_BIT) - pr_err("error bit is set in DW3\n"); - } - - if (ptd->dw3 & DW3_QTD_ACTIVE) { - dev_err(hcd->self.controller, "Transfer active bit is set DW3\n" - "nak counter: %d, rl: %d\n", - (ptd->dw3 >> 19) & 0xf, (ptd->dw2 >> 25) & 0xf); - } - - return error; -} - -static void check_int_err_status(struct usb_hcd *hcd, u32 dw4) -{ - u32 i; - - dw4 >>= 8; - - for (i = 0; i < 8; i++) { - switch (dw4 & 0x7) { - case INT_UNDERRUN: - dev_err(hcd->self.controller, "Underrun (%d)\n", i); - break; - - case INT_EXACT: - dev_err(hcd->self.controller, - "Transaction error (%d)\n", i); - break; - - case INT_BABBLE: - dev_err(hcd->self.controller, "Babble error (%d)\n", i); - break; - } - dw4 >>= 3; - } -} - -static void enqueue_one_qtd(struct usb_hcd *hcd, struct isp1760_qtd *qtd) -{ - if (qtd->length && (qtd->length <= MAX_PAYLOAD_SIZE)) { - switch (qtd->packet_type) { - case IN_PID: - break; - case OUT_PID: - case SETUP_PID: - mem_writes8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, qtd->length); - } - } -} - -static void enqueue_one_atl_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh, - u32 slot, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct ptd ptd; - - alloc_mem(hcd, qtd); - transform_into_atl(qh, qtd, &ptd); - ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); - enqueue_one_qtd(hcd, qtd); - - priv->atl_ints[slot].qh = qh; - priv->atl_ints[slot].qtd = qtd; - qtd->status |= URB_ENQUEUED; - qtd->status |= slot << 16; -} - -static void enqueue_one_int_qtd(struct usb_hcd *hcd, struct isp1760_qh *qh, - u32 slot, struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct ptd ptd; - - alloc_mem(hcd, qtd); - transform_into_int(qh, qtd, &ptd); - ptd_write(hcd->regs, INT_PTD_OFFSET, slot, &ptd); - enqueue_one_qtd(hcd, qtd); - - priv->int_ints[slot].qh = qh; - priv->int_ints[slot].qtd = qtd; - qtd->status |= URB_ENQUEUED; - qtd->status |= slot << 16; -} - -static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct isp1760_qtd *qtd) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 skip_map; - u32 slot; - - /* - * When this function is called from the interrupt handler to enqueue - * a follow-up packet, the SKIP register gets written and read back - * almost immediately. With ISP1761, this register requires a delay of - * 195ns between a write and subsequent read (see section 15.1.1.3). - */ - mmiowb(); - ndelay(195); - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); - - BUG_ON(!skip_map); - slot = __ffs(skip_map); - - enqueue_one_atl_qtd(hcd, qh, slot, qtd); - - skip_map &= ~(1 << slot); - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); - - priv->atl_queued++; - if (priv->atl_queued == 2) - reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, - INTERRUPT_ENABLE_SOT_MASK); -} - -static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh, - struct isp1760_qtd *qtd) -{ - u32 skip_map; - u32 slot; - - /* - * When this function is called from the interrupt handler to enqueue - * a follow-up packet, the SKIP register gets written and read back - * almost immediately. With ISP1761, this register requires a delay of - * 195ns between a write and subsequent read (see section 15.1.1.3). - */ - mmiowb(); - ndelay(195); - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - - BUG_ON(!skip_map); - slot = __ffs(skip_map); - - enqueue_one_int_qtd(hcd, qh, slot, qtd); - - skip_map &= ~(1 << slot); - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); -} - static void isp1760_urb_done(struct usb_hcd *hcd, struct urb *urb) __releases(priv->lock) __acquires(priv->lock) @@ -924,6 +786,8 @@ static struct isp1760_qtd *qtd_alloc(gfp_t flags, struct urb *urb, INIT_LIST_HEAD(&qtd->qtd_list); qtd->urb = urb; qtd->packet_type = packet_type; + qtd->status = QTD_ENQUEUED; + qtd->actual_length = 0; return qtd; } @@ -934,323 +798,505 @@ static void qtd_free(struct isp1760_qtd *qtd) kmem_cache_free(qtd_cachep, qtd); } -static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd, - struct isp1760_qh *qh) +static void start_bus_transfer(struct usb_hcd *hcd, u32 ptd_offset, int slot, + struct slotinfo *slots, struct isp1760_qtd *qtd, + struct isp1760_qh *qh, struct ptd *ptd) { - struct isp1760_qtd *tmp_qtd; - - if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) - tmp_qtd = NULL; - else - tmp_qtd = list_entry(qtd->qtd_list.next, struct isp1760_qtd, - qtd_list); - list_del(&qtd->qtd_list); - qtd_free(qtd); - return tmp_qtd; + struct isp1760_hcd *priv = hcd_to_priv(hcd); + WARN_ON((slot < 0) || (slot > 31)); + WARN_ON(qtd->length && !qtd->payload_addr); + WARN_ON(slots[slot].qtd); + WARN_ON(slots[slot].qh); + WARN_ON(qtd->status != QTD_PAYLOAD_ALLOC); + + slots[slot].qtd = qtd; + slots[slot].qh = qh; + qh->slot = slot; + qtd->status = QTD_XFER_STARTED; /* Set this before writing ptd, since + interrupt routine may preempt and expects this value. */ + ptd_write(hcd->regs, ptd_offset, slot, ptd); + priv->active_ptds++; } -/* - * Remove this QTD from the QH list and free its memory. If this QTD - * isn't the last one than remove also his successor(s). - * Returns the QTD which is part of an new URB and should be enqueued. - */ -static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd, - struct isp1760_qh *qh) +static int is_short_bulk(struct isp1760_qtd *qtd) { - struct urb *urb; - - urb = qtd->urb; - do { - qtd = clean_this_qtd(qtd, qh); - } while (qtd && (qtd->urb == urb)); - - return qtd; + return (usb_pipebulk(qtd->urb->pipe) && + (qtd->actual_length < qtd->length)); } -static void do_atl_int(struct usb_hcd *hcd) +static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh, + struct list_head *urb_list) { - struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 done_map, skip_map; - struct ptd ptd; - struct urb *urb; - u32 slot; - u32 length; - u32 status = -EINVAL; - int error; - struct isp1760_qtd *qtd; - struct isp1760_qh *qh; - u32 rl; - u32 nakcount; + int last_qtd; + struct isp1760_qtd *qtd, *qtd_next; + struct urb_listitem *urb_listitem; - done_map = reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG); - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); + list_for_each_entry_safe(qtd, qtd_next, &qh->qtd_list, qtd_list) { + if (qtd->status < QTD_XFER_COMPLETE) + break; - while (done_map) { - status = 0; - priv->atl_queued--; + if (list_is_last(&qtd->qtd_list, &qh->qtd_list)) + last_qtd = 1; + else + last_qtd = qtd->urb != qtd_next->urb; + + if ((!last_qtd) && (qtd->status == QTD_RETIRE)) + qtd_next->status = QTD_RETIRE; + + if (qtd->status == QTD_XFER_COMPLETE) { + if (qtd->actual_length) { + switch (qtd->packet_type) { + case IN_PID: + mem_reads8(hcd->regs, qtd->payload_addr, + qtd->data_buffer, + qtd->actual_length); + /* Fall through (?) */ + case OUT_PID: + qtd->urb->actual_length += + qtd->actual_length; + /* Fall through ... */ + case SETUP_PID: + break; + } + } - slot = __ffs(done_map); - done_map &= ~(1 << slot); - skip_map |= (1 << slot); + if (is_short_bulk(qtd)) { + if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) + qtd->urb->status = -EREMOTEIO; + if (!last_qtd) + qtd_next->status = QTD_RETIRE; + } + } - qtd = priv->atl_ints[slot].qtd; - qh = priv->atl_ints[slot].qh; + if (qtd->payload_addr) + free_mem(hcd, qtd); - /* urb unlinked? */ - if (!qh) - continue; + if (last_qtd) { + if ((qtd->status == QTD_RETIRE) && + (qtd->urb->status == -EINPROGRESS)) + qtd->urb->status = -EPIPE; + /* Defer calling of urb_done() since it releases lock */ + urb_listitem = kmem_cache_zalloc(urb_listitem_cachep, + GFP_ATOMIC); + if (unlikely(!urb_listitem)) + break; + urb_listitem->urb = qtd->urb; + list_add_tail(&urb_listitem->urb_list, urb_list); + } - ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); + list_del(&qtd->qtd_list); + qtd_free(qtd); + } +} - rl = (ptd.dw2 >> 25) & 0x0f; - nakcount = (ptd.dw3 >> 19) & 0xf; +#define ENQUEUE_DEPTH 2 +static void enqueue_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh) +{ + struct isp1760_hcd *priv = hcd_to_priv(hcd); + int ptd_offset; + struct slotinfo *slots; + int curr_slot, free_slot; + int n; + struct ptd ptd; + struct isp1760_qtd *qtd; - /* Transfer Error, *but* active and no HALT -> reload */ - if ((ptd.dw3 & DW3_ERROR_BIT) && (ptd.dw3 & DW3_QTD_ACTIVE) && - !(ptd.dw3 & DW3_HALT_BIT)) { - - /* according to ppriv code, we have to - * reload this one if trasfered bytes != requested bytes - * else act like everything went smooth.. - * XXX This just doesn't feel right and hasn't - * triggered so far. - */ + if (unlikely(list_empty(&qh->qtd_list))) { + WARN_ON(1); + return; + } - length = PTD_XFERRED_LENGTH(ptd.dw3); - dev_err(hcd->self.controller, - "Should reload now... transferred %d " - "of %zu\n", length, qtd->length); - BUG(); - } + if (usb_pipeint(list_entry(qh->qtd_list.next, struct isp1760_qtd, + qtd_list)->urb->pipe)) { + ptd_offset = INT_PTD_OFFSET; + slots = priv->int_slots; + } else { + ptd_offset = ATL_PTD_OFFSET; + slots = priv->atl_slots; + } - if (!nakcount && (ptd.dw3 & DW3_QTD_ACTIVE)) { - /* - * NAKs are handled in HW by the chip. Usually if the - * device is not able to send data fast enough. - * This happens mostly on slower hardware. - */ + free_slot = -1; + for (curr_slot = 0; curr_slot < 32; curr_slot++) { + if ((free_slot == -1) && (slots[curr_slot].qtd == NULL)) + free_slot = curr_slot; + if (slots[curr_slot].qh == qh) + break; + } - /* RL counter = ERR counter */ - ptd.dw3 &= ~(0xf << 19); - ptd.dw3 |= rl << 19; - ptd.dw3 &= ~(3 << (55 - 32)); - ptd.dw3 |= ERR_COUNTER << (55 - 32); - - /* - * It is not needed to write skip map back because it - * is unchanged. Just make sure that this entry is - * unskipped once it gets written to the HW. - */ - skip_map &= ~(1 << slot); + n = 0; + list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { + if (qtd->status == QTD_ENQUEUED) { + WARN_ON(qtd->payload_addr); + alloc_mem(hcd, qtd); + if ((qtd->length) && (!qtd->payload_addr)) + break; - ptd.dw0 |= PTD_VALID; - ptd_write(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); + if ((qtd->length) && + ((qtd->packet_type == SETUP_PID) || + (qtd->packet_type == OUT_PID))) { + mem_writes8(hcd->regs, qtd->payload_addr, + qtd->data_buffer, qtd->length); + } - priv->atl_queued++; - if (priv->atl_queued == 2) - reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, - INTERRUPT_ENABLE_SOT_MASK); - continue; + qtd->status = QTD_PAYLOAD_ALLOC; } - error = check_error(hcd, &ptd); - if (error) { - status = error; - priv->atl_ints[slot].qh->toggle = 0; - priv->atl_ints[slot].qh->ping = 0; - qtd->urb->status = -EPIPE; - -#if 0 - printk(KERN_ERR "Error in %s().\n", __func__); - printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x " - "dw3: %08x dw4: %08x dw5: %08x dw6: " - "%08x dw7: %08x\n", - ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3, - ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7); -#endif - } else { - priv->atl_ints[slot].qh->toggle = ptd.dw3 & (1 << 25); - priv->atl_ints[slot].qh->ping = ptd.dw3 & (1 << 26); + if (qtd->status == QTD_PAYLOAD_ALLOC) { +/* + if ((curr_slot > 31) && (free_slot == -1)) + dev_dbg(hcd->self.controller, "%s: No slot " + "available for transfer\n", __func__); +*/ + /* Start xfer for this endpoint if not already done */ + if ((curr_slot > 31) && (free_slot > -1)) { + if (usb_pipeint(qtd->urb->pipe)) + create_ptd_int(qh, qtd, &ptd); + else + create_ptd_atl(qh, qtd, &ptd); + + start_bus_transfer(hcd, ptd_offset, free_slot, + slots, qtd, qh, &ptd); + curr_slot = free_slot; + } + + n++; + if (n >= ENQUEUE_DEPTH) + break; } + } +} - length = PTD_XFERRED_LENGTH(ptd.dw3); - if (length) { - switch (DW1_GET_PID(ptd.dw1)) { - case IN_PID: - mem_reads8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, length); +void schedule_ptds(struct usb_hcd *hcd) +{ + struct isp1760_hcd *priv; + struct isp1760_qh *qh, *qh_next; + struct list_head *ep_queue; + struct usb_host_endpoint *ep; + LIST_HEAD(urb_list); + struct urb_listitem *urb_listitem, *urb_listitem_next; - case OUT_PID: + if (!hcd) { + WARN_ON(1); + return; + } - qtd->urb->actual_length += length; + priv = hcd_to_priv(hcd); - case SETUP_PID: - break; + /* + * check finished/retired xfers, transfer payloads, call urb_done() + */ + ep_queue = &priv->interruptqhs; + while (ep_queue) { + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) { + ep = list_entry(qh->qtd_list.next, struct isp1760_qtd, + qtd_list)->urb->ep; + collect_qtds(hcd, qh, &urb_list); + if (list_empty(&qh->qtd_list)) { + list_del(&qh->qh_list); + if (ep->hcpriv == NULL) { + /* Endpoint has been disabled, so we + can free the associated queue head. */ + qh_free(qh); + } } } - priv->atl_ints[slot].qtd = NULL; - priv->atl_ints[slot].qh = NULL; - - free_mem(hcd, qtd); + if (ep_queue == &priv->interruptqhs) + ep_queue = &priv->controlqhs; + else if (ep_queue == &priv->controlqhs) + ep_queue = &priv->bulkqhs; + else + ep_queue = NULL; + } - reg_write32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG, skip_map); + list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list, + urb_list) { + isp1760_urb_done(hcd, urb_listitem->urb); + kmem_cache_free(urb_listitem_cachep, urb_listitem); + } - if (qtd->urb->status == -EPIPE) { - /* HALT was received */ + /* + * Schedule packets for transfer. + * + * According to USB2.0 specification: + * + * 1st prio: interrupt xfers, up to 80 % of bandwidth + * 2nd prio: control xfers + * 3rd prio: bulk xfers + * + * ... but let's use a simpler scheme here (mostly because ISP1761 doc + * is very unclear on how to prioritize traffic): + * + * 1) Enqueue any queued control transfers, as long as payload chip mem + * and PTD ATL slots are available. + * 2) Enqueue any queued INT transfers, as long as payload chip mem + * and PTD INT slots are available. + * 3) Enqueue any queued bulk transfers, as long as payload chip mem + * and PTD ATL slots are available. + * + * Use double buffering (ENQUEUE_DEPTH==2) as a compromise between + * conservation of chip mem and performance. + * + * I'm sure this scheme could be improved upon! + */ + ep_queue = &priv->controlqhs; + while (ep_queue) { + list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) + enqueue_qtds(hcd, qh); + + if (ep_queue == &priv->controlqhs) + ep_queue = &priv->interruptqhs; + else if (ep_queue == &priv->interruptqhs) + ep_queue = &priv->bulkqhs; + else + ep_queue = NULL; + } +} - urb = qtd->urb; - qtd = clean_up_qtdlist(qtd, qh); - isp1760_urb_done(hcd, urb); +#define PTD_STATE_QTD_DONE 1 +#define PTD_STATE_QTD_RELOAD 2 +#define PTD_STATE_URB_RETIRE 3 - } else if (usb_pipebulk(qtd->urb->pipe) && - (length < qtd->length)) { - /* short BULK received */ +static int check_int_transfer(struct usb_hcd *hcd, struct ptd *ptd, + struct urb *urb) +{ + __dw dw4; + int i; - if (qtd->urb->transfer_flags & URB_SHORT_NOT_OK) { - qtd->urb->status = -EREMOTEIO; - dev_dbg(hcd->self.controller, - "short bulk, %d instead %zu " - "with URB_SHORT_NOT_OK flag.\n", - length, qtd->length); - } + dw4 = ptd->dw4; + dw4 >>= 8; - if (qtd->urb->status == -EINPROGRESS) - qtd->urb->status = 0; + /* FIXME: ISP1761 datasheet does not say what to do with these. Do we + need to handle these errors? Is it done in hardware? */ - urb = qtd->urb; - qtd = clean_up_qtdlist(qtd, qh); - isp1760_urb_done(hcd, urb); + if (ptd->dw3 & DW3_HALT_BIT) { - } else if (last_qtd_of_urb(qtd, qh)) { - /* that was the last qtd of that URB */ + urb->status = -EPROTO; /* Default unknown error */ - if (qtd->urb->status == -EINPROGRESS) - qtd->urb->status = 0; + for (i = 0; i < 8; i++) { + switch (dw4 & 0x7) { + case INT_UNDERRUN: + dev_dbg(hcd->self.controller, "%s: underrun " + "during uFrame %d\n", + __func__, i); + urb->status = -ECOMM; /* Could not write data */ + break; + case INT_EXACT: + dev_dbg(hcd->self.controller, "%s: transaction " + "error during uFrame %d\n", + __func__, i); + urb->status = -EPROTO; /* timeout, bad CRC, PID + error etc. */ + break; + case INT_BABBLE: + dev_dbg(hcd->self.controller, "%s: babble " + "error during uFrame %d\n", + __func__, i); + urb->status = -EOVERFLOW; + break; + } + dw4 >>= 3; + } - urb = qtd->urb; - qtd = clean_up_qtdlist(qtd, qh); - isp1760_urb_done(hcd, urb); + return PTD_STATE_URB_RETIRE; + } - } else { - /* next QTD of this URB */ + return PTD_STATE_QTD_DONE; +} - qtd = clean_this_qtd(qtd, qh); - BUG_ON(!qtd); - } +static int check_atl_transfer(struct usb_hcd *hcd, struct ptd *ptd, + struct urb *urb) +{ + WARN_ON(!ptd); + if (ptd->dw3 & DW3_HALT_BIT) { + if (ptd->dw3 & DW3_BABBLE_BIT) + urb->status = -EOVERFLOW; + else if (FROM_DW3_CERR(ptd->dw3)) + urb->status = -EPIPE; /* Stall */ + else if (ptd->dw3 & DW3_ERROR_BIT) + urb->status = -EPROTO; /* XactErr */ + else + urb->status = -EPROTO; /* Unknown */ +/* + dev_dbg(hcd->self.controller, "%s: ptd error:\n" + " dw0: %08x dw1: %08x dw2: %08x dw3: %08x\n" + " dw4: %08x dw5: %08x dw6: %08x dw7: %08x\n", + __func__, + ptd->dw0, ptd->dw1, ptd->dw2, ptd->dw3, + ptd->dw4, ptd->dw5, ptd->dw6, ptd->dw7); +*/ + return PTD_STATE_URB_RETIRE; + } - if (qtd) - enqueue_an_ATL_packet(hcd, qh, qtd); + if ((ptd->dw3 & DW3_ERROR_BIT) && (ptd->dw3 & DW3_ACTIVE_BIT)) { + /* Transfer Error, *but* active and no HALT -> reload */ + dev_dbg(hcd->self.controller, "PID error; reloading ptd\n"); + return PTD_STATE_QTD_RELOAD; + } - skip_map = reg_read32(hcd->regs, HC_ATL_PTD_SKIPMAP_REG); + if (!FROM_DW3_NAKCOUNT(ptd->dw3) && (ptd->dw3 & DW3_ACTIVE_BIT)) { + /* + * NAKs are handled in HW by the chip. Usually if the + * device is not able to send data fast enough. + * This happens mostly on slower hardware. + */ + return PTD_STATE_QTD_RELOAD; } - if (priv->atl_queued <= 1) - reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, - INTERRUPT_ENABLE_MASK); + + return PTD_STATE_QTD_DONE; } -static void do_intl_int(struct usb_hcd *hcd) +static irqreturn_t isp1760_irq(struct usb_hcd *hcd) { struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 done_map, skip_map; + u32 imask; + irqreturn_t irqret = IRQ_NONE; struct ptd ptd; - struct urb *urb; - u32 length; - int error; - u32 slot; - struct isp1760_qtd *qtd; struct isp1760_qh *qh; + int int_done_map, atl_done_map; + int slot; + int state; + struct slotinfo *slots; + u32 ptd_offset; + struct isp1760_qtd *qtd; + int modified; + static int last_active_ptds; - done_map = reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG); - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - - while (done_map) { - slot = __ffs(done_map); - done_map &= ~(1 << slot); - skip_map |= (1 << slot); - - qtd = priv->int_ints[slot].qtd; - qh = priv->int_ints[slot].qh; - - /* urb unlinked? */ - if (!qh) - continue; + spin_lock(&priv->lock); - ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd); - check_int_err_status(hcd, ptd.dw4); - - error = check_error(hcd, &ptd); - if (error) { -#if 0 - printk(KERN_ERR "Error in %s().\n", __func__); - printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x " - "dw3: %08x dw4: %08x dw5: %08x dw6: " - "%08x dw7: %08x\n", - ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3, - ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7); -#endif - qtd->urb->status = -EPIPE; - priv->int_ints[slot].qh->toggle = 0; - priv->int_ints[slot].qh->ping = 0; + if (!(hcd->state & HC_STATE_RUNNING)) + goto leave; + imask = reg_read32(hcd->regs, HC_INTERRUPT_REG); + if (unlikely(!imask)) + goto leave; + reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); /* Clear */ + + int_done_map = reg_read32(hcd->regs, HC_INT_PTD_DONEMAP_REG); + atl_done_map = reg_read32(hcd->regs, HC_ATL_PTD_DONEMAP_REG); + modified = int_done_map | atl_done_map; + + while (int_done_map || atl_done_map) { + if (int_done_map) { + /* INT ptd */ + slot = __ffs(int_done_map); + int_done_map &= ~(1 << slot); + slots = priv->int_slots; + if (!slots[slot].qh) + continue; + ptd_offset = INT_PTD_OFFSET; + ptd_read(hcd->regs, INT_PTD_OFFSET, slot, &ptd); + state = check_int_transfer(hcd, &ptd, + slots[slot].qtd->urb); } else { - priv->int_ints[slot].qh->toggle = ptd.dw3 & (1 << 25); - priv->int_ints[slot].qh->ping = ptd.dw3 & (1 << 26); + /* ATL ptd */ + slot = __ffs(atl_done_map); + atl_done_map &= ~(1 << slot); + slots = priv->atl_slots; + if (!slots[slot].qh) + continue; + ptd_offset = ATL_PTD_OFFSET; + ptd_read(hcd->regs, ATL_PTD_OFFSET, slot, &ptd); + state = check_atl_transfer(hcd, &ptd, + slots[slot].qtd->urb); } - if (qtd->urb->dev->speed != USB_SPEED_HIGH) - length = PTD_XFERRED_LENGTH_LO(ptd.dw3); - else - length = PTD_XFERRED_LENGTH(ptd.dw3); - - if (length) { - switch (DW1_GET_PID(ptd.dw1)) { - case IN_PID: - mem_reads8(hcd->regs, qtd->payload_addr, - qtd->data_buffer, length); - case OUT_PID: - - qtd->urb->actual_length += length; + qtd = slots[slot].qtd; + slots[slot].qtd = NULL; + qh = slots[slot].qh; + slots[slot].qh = NULL; + priv->active_ptds--; + qh->slot = -1; + + WARN_ON(qtd->status != QTD_XFER_STARTED); + + switch (state) { + case PTD_STATE_QTD_DONE: + if ((usb_pipeint(qtd->urb->pipe)) && + (qtd->urb->dev->speed != USB_SPEED_HIGH)) + qtd->actual_length = + FROM_DW3_SCS_NRBYTESTRANSFERRED(ptd.dw3); + else + qtd->actual_length = + FROM_DW3_NRBYTESTRANSFERRED(ptd.dw3); - case SETUP_PID: - break; - } - } + qtd->status = QTD_XFER_COMPLETE; + if (list_is_last(&qtd->qtd_list, &qh->qtd_list) || + is_short_bulk(qtd)) + qtd = NULL; + else + qtd = list_entry(qtd->qtd_list.next, + typeof(*qtd), qtd_list); - priv->int_ints[slot].qtd = NULL; - priv->int_ints[slot].qh = NULL; + qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); + qh->ping = FROM_DW3_PING(ptd.dw3); + break; - reg_write32(hcd->regs, HC_INT_PTD_SKIPMAP_REG, skip_map); - free_mem(hcd, qtd); + case PTD_STATE_QTD_RELOAD: /* QTD_RETRY, for atls only */ + qtd->status = QTD_PAYLOAD_ALLOC; + ptd.dw0 |= DW0_VALID_BIT; + /* RL counter = ERR counter */ + ptd.dw3 &= ~TO_DW3_NAKCOUNT(0xf); + ptd.dw3 |= TO_DW3_NAKCOUNT(FROM_DW2_RL(ptd.dw2)); + ptd.dw3 &= ~TO_DW3_CERR(3); + ptd.dw3 |= TO_DW3_CERR(ERR_COUNTER); + qh->toggle = FROM_DW3_DATA_TOGGLE(ptd.dw3); + qh->ping = FROM_DW3_PING(ptd.dw3); + break; - if (qtd->urb->status == -EPIPE) { - /* HALT received */ + case PTD_STATE_URB_RETIRE: + qtd->status = QTD_RETIRE; + qtd = NULL; + qh->toggle = 0; + qh->ping = 0; + break; - urb = qtd->urb; - qtd = clean_up_qtdlist(qtd, qh); - isp1760_urb_done(hcd, urb); + default: + WARN_ON(1); + continue; + } - } else if (last_qtd_of_urb(qtd, qh)) { + if (qtd && (qtd->status == QTD_PAYLOAD_ALLOC)) { + if (slots == priv->int_slots) { + if (state == PTD_STATE_QTD_RELOAD) + dev_err(hcd->self.controller, + "%s: PTD_STATE_QTD_RELOAD on " + "interrupt packet\n", __func__); + if (state != PTD_STATE_QTD_RELOAD) + create_ptd_int(qh, qtd, &ptd); + } else { + if (state != PTD_STATE_QTD_RELOAD) + create_ptd_atl(qh, qtd, &ptd); + } - if (qtd->urb->status == -EINPROGRESS) - qtd->urb->status = 0; + start_bus_transfer(hcd, ptd_offset, slot, slots, qtd, + qh, &ptd); + } + } - urb = qtd->urb; - qtd = clean_up_qtdlist(qtd, qh); - isp1760_urb_done(hcd, urb); + if (modified) + schedule_ptds(hcd); - } else { - /* next QTD of this URB */ + /* ISP1760 Errata 2 explains that interrupts may be missed (or not + happen?) if two USB devices are running simultaneously. Perhaps + this happens when a PTD is finished during interrupt handling; + enable SOF interrupts if PTDs are still scheduled when exiting this + interrupt handler, just to be safe. */ - qtd = clean_this_qtd(qtd, qh); - BUG_ON(!qtd); - } + if (priv->active_ptds != last_active_ptds) { + if (priv->active_ptds > 0) + reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, + INTERRUPT_ENABLE_SOT_MASK); + else + reg_write32(hcd->regs, HC_INTERRUPT_ENABLE, + INTERRUPT_ENABLE_MASK); + last_active_ptds = priv->active_ptds; + } - if (qtd) - enqueue_an_INT_packet(hcd, qh, qtd); + irqret = IRQ_HANDLED; +leave: + spin_unlock(&priv->lock); - skip_map = reg_read32(hcd->regs, HC_INT_PTD_SKIPMAP_REG); - } + return irqret; } static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len) @@ -1380,197 +1426,136 @@ cleanup: qtd_list_free(head); } -static int enqueue_qtdlist(struct usb_hcd *hcd, struct urb *urb, - struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct isp1760_qtd *qtd; - struct isp1760_qh *qh = NULL; - unsigned long flags; - int qh_empty; - int rc; - - spin_lock_irqsave(&priv->lock, flags); - if (!HCD_HW_ACCESSIBLE(hcd)) { - rc = -ESHUTDOWN; - goto done; - } - rc = usb_hcd_link_urb_to_ep(hcd, urb); - if (rc) - goto done; - - qh = urb->ep->hcpriv; - if (!qh) { - qh = isp1760_qh_alloc(GFP_ATOMIC); - if (!qh) { - usb_hcd_unlink_urb_from_ep(hcd, urb); - rc = -ENOMEM; - goto done; - } - if (!usb_pipecontrol(urb->pipe)) - usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), - !usb_pipein(urb->pipe), 1); - urb->ep->hcpriv = qh; - } - - qh_empty = list_empty(&qh->qtd_list); - list_splice_tail(qtd_list, &qh->qtd_list); - if (qh_empty) { - qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list); - p(hcd, qh, qtd); - } - -done: - spin_unlock_irqrestore(&priv->lock, flags); - if (!qh) - qtd_list_free(qtd_list); - return rc; -} - static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) { - struct list_head qtd_list; - packet_enqueue *pe; - - INIT_LIST_HEAD(&qtd_list); + struct isp1760_hcd *priv = hcd_to_priv(hcd); + struct list_head *ep_queue; + struct isp1760_qh *qh, *qhit; + unsigned long spinflags; + LIST_HEAD(new_qtds); + int retval; + int qh_in_queue; switch (usb_pipetype(urb->pipe)) { case PIPE_CONTROL: + ep_queue = &priv->controlqhs; + break; case PIPE_BULK: - pe = enqueue_an_ATL_packet; + ep_queue = &priv->bulkqhs; break; - case PIPE_INTERRUPT: - pe = enqueue_an_INT_packet; + if (urb->interval < 0) + return -EINVAL; + /* FIXME: Check bandwidth */ + ep_queue = &priv->interruptqhs; break; - case PIPE_ISOCHRONOUS: - dev_err(hcd->self.controller, "PIPE_ISOCHRONOUS ain't supported\n"); + dev_err(hcd->self.controller, "%s: isochronous USB packets " + "not yet supported\n", + __func__); + return -EPIPE; default: + dev_err(hcd->self.controller, "%s: unknown pipe type\n", + __func__); return -EPIPE; } - packetize_urb(hcd, urb, &qtd_list, mem_flags); - if (list_empty(&qtd_list)) - return -ENOMEM; - - return enqueue_qtdlist(hcd, urb, &qtd_list, mem_flags, pe); -} - -static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) -{ - struct isp1760_hcd *priv = hcd_to_priv(hcd); - struct inter_packet_info *ints; - u32 i; - u32 reg_base, skip_reg; - unsigned long flags; - struct ptd ptd; - packet_enqueue *pe; + if (usb_pipein(urb->pipe)) + urb->actual_length = 0; - switch (usb_pipetype(urb->pipe)) { - case PIPE_ISOCHRONOUS: - return -EPIPE; - break; + packetize_urb(hcd, urb, &new_qtds, mem_flags); + if (list_empty(&new_qtds)) + return -ENOMEM; + urb->hcpriv = NULL; /* Used to signal unlink to interrupt handler */ - case PIPE_INTERRUPT: - ints = priv->int_ints; - reg_base = INT_PTD_OFFSET; - skip_reg = HC_INT_PTD_SKIPMAP_REG; - pe = enqueue_an_INT_packet; - break; + retval = 0; + spin_lock_irqsave(&priv->lock, spinflags); - default: - ints = priv->atl_ints; - reg_base = ATL_PTD_OFFSET; - skip_reg = HC_ATL_PTD_SKIPMAP_REG; - pe = enqueue_an_ATL_packet; - break; + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + retval = -ESHUTDOWN; + goto out; } + retval = usb_hcd_link_urb_to_ep(hcd, urb); + if (retval) + goto out; - memset(&ptd, 0, sizeof(ptd)); - spin_lock_irqsave(&priv->lock, flags); - - for (i = 0; i < 32; i++) { - if (!ints[i].qh) - continue; - WARN_ON(!ints[i].qtd); - - if (ints[i].qtd->urb == urb) { - u32 skip_map; - struct isp1760_qtd *qtd; - struct isp1760_qh *qh; - - skip_map = reg_read32(hcd->regs, skip_reg); - skip_map |= 1 << i; - reg_write32(hcd->regs, skip_reg, skip_map); - - ptd_write(hcd->regs, reg_base, i, &ptd); - - qtd = ints[i].qtd; - qh = ints[i].qh; - - free_mem(hcd, qtd); - qtd = clean_up_qtdlist(qtd, qh); - - ints[i].qh = NULL; - ints[i].qtd = NULL; - - urb->status = status; - isp1760_urb_done(hcd, urb); - if (qtd) - pe(hcd, qh, qtd); - break; - - } else { - struct isp1760_qtd *qtd; - - list_for_each_entry(qtd, &ints[i].qtd->qtd_list, - qtd_list) { - if (qtd->urb == urb) { - clean_up_qtdlist(qtd, ints[i].qh); - isp1760_urb_done(hcd, urb); - qtd = NULL; - break; - } - } - - /* We found the urb before the last slot */ - if (!qtd) + qh = urb->ep->hcpriv; + if (qh) { + qh_in_queue = 0; + list_for_each_entry(qhit, ep_queue, qh_list) { + if (qhit == qh) { + qh_in_queue = 1; break; + } + } + if (!qh_in_queue) + list_add_tail(&qh->qh_list, ep_queue); + } else { + qh = qh_alloc(GFP_ATOMIC); + if (!qh) { + retval = -ENOMEM; + goto out; } + list_add_tail(&qh->qh_list, ep_queue); + urb->ep->hcpriv = qh; } - spin_unlock_irqrestore(&priv->lock, flags); - return 0; + list_splice_tail(&new_qtds, &qh->qtd_list); + schedule_ptds(hcd); + +out: + spin_unlock_irqrestore(&priv->lock, spinflags); + return retval; } -static irqreturn_t isp1760_irq(struct usb_hcd *hcd) +static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, + int status) { struct isp1760_hcd *priv = hcd_to_priv(hcd); - u32 imask; - irqreturn_t irqret = IRQ_NONE; + struct isp1760_qh *qh; + struct isp1760_qtd *qtd; + struct ptd ptd; + unsigned long spinflags; + int retval = 0; - spin_lock(&priv->lock); + spin_lock_irqsave(&priv->lock, spinflags); - if (!(hcd->state & HC_STATE_RUNNING)) - goto leave; + qh = urb->ep->hcpriv; + if (!qh) { + retval = -EINVAL; + goto out; + } - imask = reg_read32(hcd->regs, HC_INTERRUPT_REG); - if (unlikely(!imask)) - goto leave; + /* We need to forcefully reclaim the slot since some transfers never + return, e.g. interrupt transfers and NAKed bulk transfers. */ + if (qh->slot > -1) { + memset(&ptd, 0, sizeof(ptd)); + if (usb_pipebulk(urb->pipe)) { + priv->atl_slots[qh->slot].qh = NULL; + priv->atl_slots[qh->slot].qtd = NULL; + ptd_write(hcd->regs, ATL_PTD_OFFSET, qh->slot, &ptd); + } else { + priv->int_slots[qh->slot].qh = NULL; + priv->int_slots[qh->slot].qtd = NULL; + ptd_write(hcd->regs, INT_PTD_OFFSET, qh->slot, &ptd); + } + priv->active_ptds--; + qh->slot = -1; + } - reg_write32(hcd->regs, HC_INTERRUPT_REG, imask); - if (imask & (HC_ATL_INT | HC_SOT_INT)) - do_atl_int(hcd); + list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { + if (qtd->urb == urb) + qtd->status = QTD_RETIRE; + } - if (imask & HC_INTL_INT) - do_intl_int(hcd); + urb->status = status; + schedule_ptds(hcd); - irqret = IRQ_HANDLED; -leave: - spin_unlock(&priv->lock); - return irqret; +out: + spin_unlock_irqrestore(&priv->lock, spinflags); + + return retval; } static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf) @@ -1661,7 +1646,7 @@ static int check_reset_complete(struct usb_hcd *hcd, int index, /* if reset finished and it's still not enabled -- handoff */ if (!(port_status & PORT_PE)) { - dev_err(hcd->self.controller, + dev_info(hcd->self.controller, "port %d full speed --> companion\n", index + 1); @@ -1670,7 +1655,7 @@ static int check_reset_complete(struct usb_hcd *hcd, int index, reg_write32(hcd->regs, HC_PORTSC1, port_status); } else - dev_err(hcd->self.controller, "port %d high speed\n", + dev_info(hcd->self.controller, "port %d high speed\n", index + 1); return port_status; @@ -1948,43 +1933,32 @@ static void isp1760_endpoint_disable(struct usb_hcd *hcd, struct isp1760_hcd *priv = hcd_to_priv(hcd); struct isp1760_qh *qh; struct isp1760_qtd *qtd; - unsigned long flags; + unsigned long spinflags; + int do_iter; - spin_lock_irqsave(&priv->lock, flags); + spin_lock_irqsave(&priv->lock, spinflags); qh = ep->hcpriv; if (!qh) goto out; - ep->hcpriv = NULL; - do { - /* more than entry might get removed */ - if (list_empty(&qh->qtd_list)) - break; - - qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd, - qtd_list); - - if (qtd->status & URB_ENQUEUED) { - spin_unlock_irqrestore(&priv->lock, flags); - isp1760_urb_dequeue(hcd, qtd->urb, -ECONNRESET); - spin_lock_irqsave(&priv->lock, flags); - } else { - struct urb *urb; - - urb = qtd->urb; - clean_up_qtdlist(qtd, qh); - urb->status = -ECONNRESET; - isp1760_urb_done(hcd, urb); + do_iter = !list_empty(&qh->qtd_list); + while (do_iter) { + do_iter = 0; + list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { + if (qtd->urb->ep == ep) { + spin_unlock_irqrestore(&priv->lock, spinflags); + isp1760_urb_dequeue(hcd, qtd->urb, -ECONNRESET); + spin_lock_irqsave(&priv->lock, spinflags); + do_iter = 1; + break; /* Restart iteration */ + } } - } while (1); + } + ep->hcpriv = NULL; + /* Cannot free qh here since it will be parsed by schedule_ptds() */ - qh_destroy(qh); - /* remove requests and leak them. - * ATL are pretty fast done, INT could take a while... - * The latter shoule be removed - */ out: - spin_unlock_irqrestore(&priv->lock, flags); + spin_unlock_irqrestore(&priv->lock, spinflags); } static int isp1760_get_frame(struct usb_hcd *hcd) @@ -2048,6 +2022,13 @@ static const struct hc_driver isp1760_hc_driver = { int __init init_kmem_once(void) { + urb_listitem_cachep = kmem_cache_create("isp1760 urb_listitem", + sizeof(struct urb_listitem), 0, SLAB_TEMPORARY | + SLAB_MEM_SPREAD, NULL); + + if (!urb_listitem_cachep) + return -ENOMEM; + qtd_cachep = kmem_cache_create("isp1760_qtd", sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL); @@ -2070,6 +2051,7 @@ void deinit_kmem_cache(void) { kmem_cache_destroy(qtd_cachep); kmem_cache_destroy(qh_cachep); + kmem_cache_destroy(urb_listitem_cachep); } struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len, |