git.openwrt.org Git - openwrt/staging/xback.git/blob

   1 From 6a313b6072925ab757688328b9f91b16d5a39bb3 Mon Sep 17 00:00:00 2001
   2 From: Peter Chen <peter.chen@nxp.com>
   3 Date: Fri, 9 Feb 2018 10:11:32 +0800
   4 Subject: [PATCH] MLK-17380-4 usb: host: xhci: add EH SINGLE_STEP_SET_FEATURE
   5  Test for USB2
   6
   7 This function is similar with EHCI's, but implemented using XHCI.
   8 The USB2 host needs to send SETUP packet first, then wait 15
   9 seconds before DATA (IN) + STATUS stage.
  10
  11 It is needed at USB Certification test for Embedded Host 2.0, and
  12 the detail is at CH6.4.1.1 of On-The-Go and Embedded Host Supplement
  13 to the USB Revision 2.0 Specification
  14
  15 Acked-by: Jun Li <jun.li@nxp.com>
  16 Signed-off-by: Peter Chen <peter.chen@nxp.com>
  17 (cherry picked from commit 8d46e3bca527a5d899446d3858274fb5cbab1a1e)
  18 ---
  19  drivers/usb/host/xhci-hub.c  |   9 ++++
  20  drivers/usb/host/xhci-ring.c | 123 +++++++++++++++++++++++++++++++++++++++++++
  21  drivers/usb/host/xhci.c      |   1 +
  22  drivers/usb/host/xhci.h      |  10 ++++
  23  4 files changed, 143 insertions(+)
  24
  25 --- a/drivers/usb/host/xhci-hub.c
  26 +++ b/drivers/usb/host/xhci-hub.c
  27 @@ -1420,6 +1420,15 @@ int xhci_hub_control(struct usb_hcd *hcd
  28                         /* 4.19.6 Port Test Modes (USB2 Test Mode) */
  29                         if (hcd->speed != HCD_USB2)
  30                                 goto error;
  31 +#ifdef CONFIG_USB_HCD_TEST_MODE
  32 +                       if (test_mode == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
  33 +                               spin_unlock_irqrestore(&xhci->lock, flags);
  34 +                               retval = ehset_single_step_set_feature(hcd,
  35 +                                                               wIndex + 1);
  36 +                               spin_lock_irqsave(&xhci->lock, flags);
  37 +                               break;
  38 +                       }
  39 +#endif
  40                         if (test_mode > TEST_FORCE_EN || test_mode < TEST_J)
  41                                 goto error;
  42                         retval = xhci_enter_test_mode(xhci, test_mode, wIndex,
  43 --- a/drivers/usb/host/xhci-ring.c
  44 +++ b/drivers/usb/host/xhci-ring.c
  45 @@ -3624,6 +3624,129 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *
  46         return 0;
  47  }
  48
  49 +#ifdef CONFIG_USB_HCD_TEST_MODE
  50 +/*
  51 + * This function prepare TRBs and submits them for the
  52 + * SINGLE_STEP_SET_FEATURE Test.
  53 + * This is done in two parts: first SETUP req for GetDesc is sent then
  54 + * 15 seconds later, the IN stage for GetDesc starts to req data from dev
  55 + *
  56 + * is_setup : argument decides which of the two stage needs to be
  57 + * performed; TRUE - SETUP and FALSE - IN+STATUS
  58 + * Returns 0 if success
  59 + */
  60 +int xhci_submit_single_step_set_feature(struct usb_hcd *hcd,
  61 +       struct urb *urb, int is_setup)
  62 +{
  63 +       int slot_id;
  64 +       unsigned int ep_index;
  65 +       struct xhci_ring *ep_ring;
  66 +       int ret;
  67 +       struct usb_ctrlrequest *setup;
  68 +       struct xhci_generic_trb *start_trb;
  69 +       int start_cycle;
  70 +       u32 field, length_field, remainder;
  71 +       struct urb_priv *urb_priv;
  72 +       struct xhci_td *td;
  73 +       struct xhci_hcd *xhci = hcd_to_xhci(hcd);
  74 +
  75 +       /* urb_priv will be free after transcation has completed */
  76 +       urb_priv = kzalloc(sizeof(struct urb_priv) +
  77 +                       sizeof(struct xhci_td), GFP_KERNEL);
  78 +       if (!urb_priv)
  79 +               return -ENOMEM;
  80 +
  81 +       td = &urb_priv->td[0];
  82 +       urb_priv->num_tds = 1;
  83 +       urb_priv->num_tds_done = 0;
  84 +       urb->hcpriv = urb_priv;
  85 +
  86 +       ep_ring = xhci_urb_to_transfer_ring(xhci, urb);
  87 +       if (!ep_ring) {
  88 +               ret = -EINVAL;
  89 +               goto free_priv;
  90 +       }
  91 +
  92 +       slot_id = urb->dev->slot_id;
  93 +       ep_index = xhci_get_endpoint_index(&urb->ep->desc);
  94 +
  95 +       setup = (struct usb_ctrlrequest *) urb->setup_packet;
  96 +       if (is_setup) {
  97 +               ret = prepare_transfer(xhci, xhci->devs[slot_id],
  98 +                               ep_index, urb->stream_id,
  99 +                               1, urb, 0, GFP_KERNEL);
 100 +               if (ret < 0)
 101 +                       goto free_priv;
 102 +
 103 +               start_trb = &ep_ring->enqueue->generic;
 104 +               start_cycle = ep_ring->cycle_state;
 105 +               /* Save the DMA address of the last TRB in the TD */
 106 +               td->last_trb = ep_ring->enqueue;
 107 +               field = TRB_IOC | TRB_IDT | TRB_TYPE(TRB_SETUP) | start_cycle;
 108 +               /* xHCI 1.0/1.1 6.4.1.2.1: Transfer Type field */
 109 +               if ((xhci->hci_version >= 0x100) ||
 110 +                               (xhci->quirks & XHCI_MTK_HOST))
 111 +                       field |= TRB_TX_TYPE(TRB_DATA_IN);
 112 +
 113 +               queue_trb(xhci, ep_ring, false,
 114 +                         setup->bRequestType | setup->bRequest << 8 |
 115 +                         le16_to_cpu(setup->wValue) << 16,
 116 +                         le16_to_cpu(setup->wIndex) |
 117 +                         le16_to_cpu(setup->wLength) << 16,
 118 +                         TRB_LEN(8) | TRB_INTR_TARGET(0),
 119 +                         /* Immediate data in pointer */
 120 +                         field);
 121 +               giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id,
 122 +                               start_cycle, start_trb);
 123 +               return 0;
 124 +       }
 125 +
 126 +       ret = prepare_transfer(xhci, xhci->devs[slot_id],
 127 +                       ep_index, urb->stream_id,
 128 +                       2, urb, 0, GFP_KERNEL);
 129 +       if (ret < 0)
 130 +               goto free_priv;
 131 +
 132 +       start_trb = &ep_ring->enqueue->generic;
 133 +       start_cycle = ep_ring->cycle_state;
 134 +       field = TRB_ISP | TRB_TYPE(TRB_DATA);
 135 +
 136 +       remainder = xhci_td_remainder(xhci, 0,
 137 +                                  urb->transfer_buffer_length,
 138 +                                  urb->transfer_buffer_length,
 139 +                                  urb, 1);
 140 +
 141 +       length_field = TRB_LEN(urb->transfer_buffer_length) |
 142 +               TRB_TD_SIZE(remainder) |
 143 +               TRB_INTR_TARGET(0);
 144 +
 145 +       if (urb->transfer_buffer_length > 0) {
 146 +               field |= TRB_DIR_IN;
 147 +               queue_trb(xhci, ep_ring, true,
 148 +                               lower_32_bits(urb->transfer_dma),
 149 +                               upper_32_bits(urb->transfer_dma),
 150 +                               length_field,
 151 +                               field | ep_ring->cycle_state);
 152 +       }
 153 +
 154 +       td->last_trb = ep_ring->enqueue;
 155 +       field = TRB_IOC | TRB_TYPE(TRB_STATUS) | ep_ring->cycle_state;
 156 +       queue_trb(xhci, ep_ring, false,
 157 +                       0,
 158 +                       0,
 159 +                       TRB_INTR_TARGET(0),
 160 +                       field);
 161 +
 162 +       giveback_first_trb(xhci, slot_id, ep_index, 0,
 163 +                       start_cycle, start_trb);
 164 +
 165 +       return 0;
 166 +free_priv:
 167 +       xhci_urb_free_priv(urb_priv);
 168 +       return ret;
 169 +}
 170 +#endif /* CONFIG_USB_HCD_TEST_MODE */
 171 +
 172  /*
 173   * The transfer burst count field of the isochronous TRB defines the number of
 174   * bursts that are required to move all packets in this TD.  Only SuperSpeed
 175 --- a/drivers/usb/host/xhci.c
 176 +++ b/drivers/usb/host/xhci.c
 177 @@ -5385,6 +5385,7 @@ static const struct hc_driver xhci_hc_dr
 178         .disable_usb3_lpm_timeout =     xhci_disable_usb3_lpm_timeout,
 179         .find_raw_port_number = xhci_find_raw_port_number,
 180         .clear_tt_buffer_complete = xhci_clear_tt_buffer_complete,
 181 +       .submit_single_step_set_feature = xhci_submit_single_step_set_feature,
 182  };
 183
 184  void xhci_init_driver(struct hc_driver *drv,
 185 --- a/drivers/usb/host/xhci.h
 186 +++ b/drivers/usb/host/xhci.h
 187 @@ -2154,6 +2154,16 @@ int xhci_find_raw_port_number(struct usb
 188  struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd);
 189
 190  void xhci_hc_died(struct xhci_hcd *xhci);
 191 +#ifdef CONFIG_USB_HCD_TEST_MODE
 192 +int xhci_submit_single_step_set_feature(struct usb_hcd *hcd,
 193 +       struct urb *urb, int is_setup);
 194 +#else
 195 +static inline int xhci_submit_single_step_set_feature(struct usb_hcd *hcd,
 196 +       struct urb *urb, int is_setup)
 197 +{
 198 +       return 0;
 199 +}
 200 +#endif
 201
 202  #ifdef CONFIG_PM
 203  int xhci_bus_suspend(struct usb_hcd *hcd);