target/linux/generic/pending-4.4/160-usb-gadget-udc-net2280-add-usb2380-support.patch

   1 From 5185c91385d73cdf79836eb8548e4726e43ae831 Mon Sep 17 00:00:00 2001
   2 From: Tim Harvey <tharvey@gateworks.com>
   3 Date: Mon, 23 May 2016 06:58:41 -0700
   4 Subject: [PATCH] usb: gadget: net2280: add USB2380 support
   5
   6 The PLX USB2380 is a PCIe version of the NET2280 and behaves more like the
   7 USB338x but without the USB3.0 superspeed support.
   8
   9 This was tested with g_ether, g_serial, g_mass_storage on a Gateworks
  10 Ventana GW2383.
  11
  12 Cc: Justin DeFields <justindefields@gmail.com>
  13 Signed-off-by: Tim Harvey <tharvey@gateworks.com>
  14 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  15 ---
  16  drivers/usb/gadget/udc/Kconfig   |  4 +++-
  17  drivers/usb/gadget/udc/net2280.c | 51 +++++++++++++++++++++++-----------------
  18  drivers/usb/gadget/udc/net2280.h |  1 +
  19  3 files changed, 34 insertions(+), 22 deletions(-)
  20
  21 --- a/drivers/usb/gadget/udc/Kconfig
  22 +++ b/drivers/usb/gadget/udc/Kconfig
  23 @@ -298,7 +298,7 @@ config USB_NET2272_DMA
  24           If unsure, say "N" here.  The driver works fine in PIO mode.
  25
  26  config USB_NET2280
  27 -       tristate "NetChip 228x / PLX USB338x"
  28 +       tristate "NetChip NET228x / PLX USB3x8x"
  29         depends on PCI
  30         help
  31            NetChip 2280 / 2282 is a PCI based USB peripheral controller which
  32 @@ -308,6 +308,8 @@ config USB_NET2280
  33            (for control transfers) and several endpoints with dedicated
  34            functions.
  35
  36 +          PLX 2380 is a PCIe version of the PLX 2380.
  37 +
  38            PLX 3380 / 3382 is a PCIe based USB peripheral controller which
  39            supports full, high speed USB 2.0 and super speed USB 3.0
  40            data transfers.
  41 --- a/drivers/usb/gadget/udc/net2280.c
  42 +++ b/drivers/usb/gadget/udc/net2280.c
  43 @@ -211,7 +211,7 @@ net2280_enable(struct usb_ep *_ep, const
  44                 goto print_err;
  45         }
  46
  47 -       if (dev->quirks & PLX_SUPERSPEED) {
  48 +       if (dev->quirks & PLX_PCIE) {
  49                 if ((desc->bEndpointAddress & 0x0f) >= 0x0c) {
  50                         ret = -EDOM;
  51                         goto print_err;
  52 @@ -245,7 +245,7 @@ net2280_enable(struct usb_ep *_ep, const
  53         /* set type, direction, address; reset fifo counters */
  54         writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);
  55
  56 -       if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) {
  57 +       if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
  58                 tmp = readl(&ep->cfg->ep_cfg);
  59                 /* If USB ep number doesn't match hardware ep number */
  60                 if ((tmp & 0xf) != usb_endpoint_num(desc)) {
  61 @@ -316,7 +316,7 @@ net2280_enable(struct usb_ep *_ep, const
  62                         BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp);
  63         }
  64
  65 -       if (dev->quirks & PLX_SUPERSPEED)
  66 +       if (dev->quirks & PLX_PCIE)
  67                 ep_clear_seqnum(ep);
  68         writel(tmp, &ep->cfg->ep_cfg);
  69
  70 @@ -527,7 +527,7 @@ static int net2280_disable(struct usb_ep
  71         spin_lock_irqsave(&ep->dev->lock, flags);
  72         nuke(ep);
  73
  74 -       if (ep->dev->quirks & PLX_SUPERSPEED)
  75 +       if (ep->dev->quirks & PLX_PCIE)
  76                 ep_reset_338x(ep->dev->regs, ep);
  77         else
  78                 ep_reset_228x(ep->dev->regs, ep);
  79 @@ -862,7 +862,7 @@ static void start_queue(struct net2280_e
  80         writel(readl(&dma->dmastat), &dma->dmastat);
  81
  82         writel(td_dma, &dma->dmadesc);
  83 -       if (ep->dev->quirks & PLX_SUPERSPEED)
  84 +       if (ep->dev->quirks & PLX_PCIE)
  85                 dmactl |= BIT(DMA_REQUEST_OUTSTANDING);
  86         writel(dmactl, &dma->dmactl);
  87
  88 @@ -1046,7 +1046,7 @@ net2280_queue(struct usb_ep *_ep, struct
  89
  90         /* kickstart this i/o queue? */
  91         if  (list_empty(&ep->queue) && !ep->stopped &&
  92 -               !((dev->quirks & PLX_SUPERSPEED) && ep->dma &&
  93 +               !((dev->quirks & PLX_PCIE) && ep->dma &&
  94                   (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)))) {
  95
  96                 /* use DMA if the endpoint supports it, else pio */
  97 @@ -1169,7 +1169,7 @@ static void scan_dma_completions(struct
  98                         break;
  99                 } else if (!ep->is_in &&
 100                            (req->req.length % ep->ep.maxpacket) &&
 101 -                          !(ep->dev->quirks & PLX_SUPERSPEED)) {
 102 +                          !(ep->dev->quirks & PLX_PCIE)) {
 103
 104                         tmp = readl(&ep->regs->ep_stat);
 105                         /* AVOID TROUBLE HERE by not issuing short reads from
 106 @@ -1367,7 +1367,7 @@ net2280_set_halt_and_wedge(struct usb_ep
 107                                 ep->wedged = 1;
 108                 } else {
 109                         clear_halt(ep);
 110 -                       if (ep->dev->quirks & PLX_SUPERSPEED &&
 111 +                       if (ep->dev->quirks & PLX_PCIE &&
 112                                 !list_empty(&ep->queue) && ep->td_dma)
 113                                         restart_dma(ep);
 114                         ep->wedged = 0;
 115 @@ -2394,7 +2394,7 @@ static int net2280_start(struct usb_gadg
 116          */
 117         net2280_led_active(dev, 1);
 118
 119 -       if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched)
 120 +       if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
 121                 defect7374_enable_data_eps_zero(dev);
 122
 123         ep0_start(dev);
 124 @@ -3060,7 +3060,7 @@ static void handle_stat0_irqs(struct net
 125                 }
 126                 ep->stopped = 0;
 127                 dev->protocol_stall = 0;
 128 -               if (!(dev->quirks & PLX_SUPERSPEED)) {
 129 +               if (!(dev->quirks & PLX_PCIE)) {
 130                         if (ep->dev->quirks & PLX_2280)
 131                                 tmp = BIT(FIFO_OVERFLOW) |
 132                                     BIT(FIFO_UNDERFLOW);
 133 @@ -3087,7 +3087,7 @@ static void handle_stat0_irqs(struct net
 134                 cpu_to_le32s(&u.raw[0]);
 135                 cpu_to_le32s(&u.raw[1]);
 136
 137 -               if ((dev->quirks & PLX_SUPERSPEED) && !dev->bug7734_patched)
 138 +               if ((dev->quirks & PLX_PCIE) && !dev->bug7734_patched)
 139                         defect7374_workaround(dev, u.r);
 140
 141                 tmp = 0;
 142 @@ -3170,7 +3170,7 @@ static void handle_stat0_irqs(struct net
 143                         } else {
 144                                 ep_vdbg(dev, "%s clear halt\n", e->ep.name);
 145                                 clear_halt(e);
 146 -                               if ((ep->dev->quirks & PLX_SUPERSPEED) &&
 147 +                               if ((ep->dev->quirks & PLX_PCIE) &&
 148                                         !list_empty(&e->queue) && e->td_dma)
 149                                                 restart_dma(e);
 150                         }
 151 @@ -3192,7 +3192,7 @@ static void handle_stat0_irqs(struct net
 152                         if (e->ep.name == ep0name)
 153                                 goto do_stall;
 154                         set_halt(e);
 155 -                       if ((dev->quirks & PLX_SUPERSPEED) && e->dma)
 156 +                       if ((dev->quirks & PLX_PCIE) && e->dma)
 157                                 abort_dma(e);
 158                         allow_status(ep);
 159                         ep_vdbg(dev, "%s set halt\n", ep->ep.name);
 160 @@ -3231,7 +3231,7 @@ do_stall:
 161  #undef w_length
 162
 163  next_endpoints:
 164 -       if ((dev->quirks & PLX_SUPERSPEED) && dev->enhanced_mode) {
 165 +       if ((dev->quirks & PLX_PCIE) && dev->enhanced_mode) {
 166                 u32 mask = (BIT(ENDPOINT_0_INTERRUPT) |
 167                         USB3380_IRQSTAT0_EP_INTR_MASK_IN |
 168                         USB3380_IRQSTAT0_EP_INTR_MASK_OUT);
 169 @@ -3392,7 +3392,7 @@ static void handle_stat1_irqs(struct net
 170                 writel(tmp, &dma->dmastat);
 171
 172                 /* dma sync*/
 173 -               if (dev->quirks & PLX_SUPERSPEED) {
 174 +               if (dev->quirks & PLX_PCIE) {
 175                         u32 r_dmacount = readl(&dma->dmacount);
 176                         if (!ep->is_in &&  (r_dmacount & 0x00FFFFFF) &&
 177                             (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT)))
 178 @@ -3461,7 +3461,7 @@ static irqreturn_t net2280_irq(int irq,
 179         /* control requests and PIO */
 180         handle_stat0_irqs(dev, readl(&dev->regs->irqstat0));
 181
 182 -       if (dev->quirks & PLX_SUPERSPEED) {
 183 +       if (dev->quirks & PLX_PCIE) {
 184                 /* re-enable interrupt to trigger any possible new interrupt */
 185                 u32 pciirqenb1 = readl(&dev->regs->pciirqenb1);
 186                 writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1);
 187 @@ -3506,7 +3506,7 @@ static void net2280_remove(struct pci_de
 188         }
 189         if (dev->got_irq)
 190                 free_irq(pdev->irq, dev);
 191 -       if (dev->quirks & PLX_SUPERSPEED)
 192 +       if (dev->quirks & PLX_PCIE)
 193                 pci_disable_msi(pdev);
 194         if (dev->regs)
 195                 iounmap(dev->regs);
 196 @@ -3586,7 +3586,7 @@ static int net2280_probe(struct pci_dev
 197         dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200);
 198         dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300);
 199
 200 -       if (dev->quirks & PLX_SUPERSPEED) {
 201 +       if (dev->quirks & PLX_PCIE) {
 202                 u32 fsmvalue;
 203                 u32 usbstat;
 204                 dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *)
 205 @@ -3630,7 +3630,7 @@ static int net2280_probe(struct pci_dev
 206                 goto done;
 207         }
 208
 209 -       if (dev->quirks & PLX_SUPERSPEED)
 210 +       if (dev->quirks & PLX_PCIE)
 211                 if (pci_enable_msi(pdev))
 212                         ep_err(dev, "Failed to enable MSI mode\n");
 213
 214 @@ -3748,10 +3748,19 @@ static const struct pci_device_id pci_id
 215         .class =        ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
 216         .class_mask =   ~0,
 217         .vendor =       PCI_VENDOR_ID_PLX,
 218 +       .device =       0x2380,
 219 +       .subvendor =    PCI_ANY_ID,
 220 +       .subdevice =    PCI_ANY_ID,
 221 +       .driver_data =  PLX_PCIE,
 222 +        },
 223 +       {
 224 +       .class =        ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
 225 +       .class_mask =   ~0,
 226 +       .vendor =       PCI_VENDOR_ID_PLX,
 227         .device =       0x3380,
 228         .subvendor =    PCI_ANY_ID,
 229         .subdevice =    PCI_ANY_ID,
 230 -       .driver_data =  PLX_SUPERSPEED,
 231 +       .driver_data =  PLX_PCIE | PLX_SUPERSPEED,
 232          },
 233         {
 234         .class =        ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
 235 @@ -3760,7 +3769,7 @@ static const struct pci_device_id pci_id
 236         .device =       0x3382,
 237         .subvendor =    PCI_ANY_ID,
 238         .subdevice =    PCI_ANY_ID,
 239 -       .driver_data =  PLX_SUPERSPEED,
 240 +       .driver_data =  PLX_PCIE | PLX_SUPERSPEED,
 241          },
 242  { /* end: all zeroes */ }
 243  };
 244 --- a/drivers/usb/gadget/udc/net2280.h
 245 +++ b/drivers/usb/gadget/udc/net2280.h
 246 @@ -47,6 +47,7 @@ set_idx_reg(struct net2280_regs __iomem
 247  #define PLX_LEGACY             BIT(0)
 248  #define PLX_2280               BIT(1)
 249  #define PLX_SUPERSPEED         BIT(2)
 250 +#define PLX_PCIE               BIT(3)
 251
 252  #define REG_DIAG               0x0
 253  #define     RETRY_COUNTER                                       16