[PATCH v4 12/13] usb: dwc2: Add gadget driver
Jules Maselbas
jmaselbas at kalray.eu
Tue Aug 11 11:16:36 EDT 2020
This driver is comes from Linux (~ 5.1-rc6) and only support buffer DMA.
Signed-off-by: Jules Maselbas <jmaselbas at kalray.eu>
---
drivers/usb/dwc2/Kconfig | 7 +
drivers/usb/dwc2/Makefile | 1 +
drivers/usb/dwc2/core.c | 64 +
drivers/usb/dwc2/core.h | 7 +
drivers/usb/dwc2/dwc2.c | 2 +
drivers/usb/dwc2/dwc2.h | 7 +
drivers/usb/dwc2/gadget.c | 2736 +++++++++++++++++++++++++++++++++++++
drivers/usb/dwc2/regs.h | 1 +
8 files changed, 2825 insertions(+)
create mode 100644 drivers/usb/dwc2/gadget.c
diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig
index cd24d8cfa..3c3cdc3de 100644
--- a/drivers/usb/dwc2/Kconfig
+++ b/drivers/usb/dwc2/Kconfig
@@ -12,3 +12,10 @@ config USB_DWC2_HOST
select USB_DWC2
help
Select this when you want to use DWC2 in host mode.
+
+config USB_DWC2_GADGET
+ bool "DWC2 Gadget mode support"
+ depends on USB_GADGET
+ select USB_DWC2
+ help
+ Select this when you want to use DWC2 in gadget mode.
diff --git a/drivers/usb/dwc2/Makefile b/drivers/usb/dwc2/Makefile
index f513fbec7..f019051d8 100644
--- a/drivers/usb/dwc2/Makefile
+++ b/drivers/usb/dwc2/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_USB_DWC2_HOST) += dwc2.o core.o host.o rhub.o
+obj-$(CONFIG_USB_DWC2_GADGET) += dwc2.o core.o gadget.o
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index a8693097d..c4a3cc789 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -87,6 +87,46 @@ void dwc2_set_param_phy_utmi_width(struct dwc2 *dwc2)
dwc2->params.phy_utmi_width = val;
}
+/**
+ * dwc2_hsotg_tx_fifo_count - return count of TX FIFOs in device mode
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+int dwc2_tx_fifo_count(struct dwc2 *dwc2)
+{
+ if (dwc2->hw_params.en_multiple_tx_fifo)
+ /* In dedicated FIFO mode we need count of IN EPs */
+ return dwc2->hw_params.num_dev_in_eps;
+ else
+ /* In shared FIFO mode we need count of Periodic IN EPs */
+ return dwc2->hw_params.num_dev_perio_in_ep;
+}
+
+static void dwc2_set_param_fifo_sizes(struct dwc2 *dwc2)
+{
+ struct dwc2_hw_params *hw = &dwc2->hw_params;
+ struct dwc2_core_params *p = &dwc2->params;
+ u32 total_fifo_size = dwc2->hw_params.total_fifo_size;
+ u32 max_np_tx_fifo_size = hw->dev_nperio_tx_fifo_size;
+ u32 max_rx_fifo_size = hw->rx_fifo_size;
+ u32 depth;
+ int count, i;
+
+ count = dwc2_tx_fifo_count(dwc2);
+
+ depth = total_fifo_size / 4;
+ p->g_np_tx_fifo_size = min(max_np_tx_fifo_size, depth);
+ total_fifo_size -= p->g_np_tx_fifo_size;
+
+ depth = 8 * count + 256;
+ depth = max(total_fifo_size / count, depth);
+ p->g_rx_fifo_size = min(max_rx_fifo_size, depth);
+ total_fifo_size -= p->g_rx_fifo_size;
+
+ for (i = 1; i <= count; i++)
+ p->g_tx_fifo_size[i] = total_fifo_size / count;
+}
+
/**
* dwc2_set_default_params() - Set all core parameters to their
* auto-detected default values.
@@ -138,6 +178,11 @@ void dwc2_set_default_params(struct dwc2 *dwc2)
p->host_nperio_tx_fifo_size = hw->host_nperio_tx_fifo_size;
p->host_perio_tx_fifo_size = hw->host_perio_tx_fifo_size;
}
+
+ if ((dwc2->dr_mode == USB_DR_MODE_PERIPHERAL) ||
+ (dwc2->dr_mode == USB_DR_MODE_OTG)) {
+ dwc2_set_param_fifo_sizes(dwc2);
+ }
}
int dwc2_core_snpsid(struct dwc2 *dwc2)
@@ -167,6 +212,23 @@ int dwc2_core_snpsid(struct dwc2 *dwc2)
return 0;
}
+static void dwc2_get_dev_hwparams(struct dwc2 *dwc2)
+{
+ struct dwc2_hw_params *hw = &dwc2->hw_params;
+ u32 size;
+ int count, i;
+
+ size = FIFOSIZE_DEPTH_GET(dwc2_readl(dwc2, GNPTXFSIZ));
+ hw->dev_nperio_tx_fifo_size = size;
+
+ count = dwc2_tx_fifo_count(dwc2);
+
+ for (i = 1; i <= count; i++) {
+ size = FIFOSIZE_DEPTH_GET(dwc2_readl(dwc2, DPTXFSIZN(i)));
+ hw->g_tx_fifo_size[i] = size;
+ }
+}
+
/**
* During device initialization, read various hardware configuration
* registers and interpret the contents.
@@ -243,6 +305,8 @@ void dwc2_get_hwparams(struct dwc2 *dwc2)
/* fifo sizes */
hw->rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
GRXFSIZ_DEPTH_SHIFT;
+
+ dwc2_get_dev_hwparams(dwc2);
}
/*
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index b188990a0..090ca15fe 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -482,7 +482,14 @@ struct dwc2 {
void *ctrl_buff;
enum dwc2_ep0_state ep0_state;
struct usb_gadget_driver *driver;
+
int num_eps;
+ u16 frame_number;
+ u32 fifo_map;
+ unsigned int dedicated_fifos:1;
+ unsigned int enabled:1;
+ unsigned int connected:1;
+ unsigned int is_selfpowered:1;
#endif
};
diff --git a/drivers/usb/dwc2/dwc2.c b/drivers/usb/dwc2/dwc2.c
index 5e1f73a8a..45be2c070 100644
--- a/drivers/usb/dwc2/dwc2.c
+++ b/drivers/usb/dwc2/dwc2.c
@@ -65,6 +65,8 @@ static int dwc2_probe(struct device_d *dev)
dev->priv = dwc2;
ret = dwc2_register_host(dwc2);
+
+ ret = dwc2_gadget_init(dwc2);
error:
return ret;
}
diff --git a/drivers/usb/dwc2/dwc2.h b/drivers/usb/dwc2/dwc2.h
index f620175df..0ec21a5ac 100644
--- a/drivers/usb/dwc2/dwc2.h
+++ b/drivers/usb/dwc2/dwc2.h
@@ -18,6 +18,7 @@ void dwc2_get_hwparams(struct dwc2 *dwc2);
void dwc2_init_fs_ls_pclk_sel(struct dwc2 *dwc2);
void dwc2_flush_all_fifo(struct dwc2 *dwc2);
void dwc2_flush_tx_fifo(struct dwc2 *dwc2, const int idx);
+int dwc2_tx_fifo_count(struct dwc2 *dwc2);
int dwc2_phy_init(struct dwc2 *dwc2, bool select_phy);
int dwc2_gahbcfg_init(struct dwc2 *dwc2);
@@ -37,3 +38,9 @@ int dwc2_register_host(struct dwc2 *dwc2);
static inline int dwc2_register_host(struct dwc2 *dwc2) { return 0; }
#endif
+/* Gadget functions */
+#ifdef CONFIG_USB_DWC2_GADGET
+int dwc2_gadget_init(struct dwc2 *dwc2);
+#else
+static inline int dwc2_gadget_init(struct dwc2 *dwc2) { return 0; }
+#endif
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
new file mode 100644
index 000000000..6a65b9b11
--- /dev/null
+++ b/drivers/usb/dwc2/gadget.c
@@ -0,0 +1,2736 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <dma.h>
+#include <usb/gadget.h>
+#include "dwc2.h"
+
+#define to_dwc2 gadget_to_dwc2
+#define dwc2_set_bit(d, r, b) dwc2_writel(d, (b) | dwc2_readl(d, r), r)
+#define dwc2_clear_bit(d, r, b) dwc2_writel(d, ~(b) & dwc2_readl(d, r), r)
+
+#define spin_lock(lock)
+#define spin_unlock(lock)
+#define local_irq_save(flags)(void)(flags)
+#define local_irq_restore(flags) (void)(flags)
+#define spin_lock_irqsave(lock, flags) (void)(flags)
+#define spin_unlock_irqrestore(lock, flags) (void)(flags)
+
+#ifndef USB_ENDPOINT_MAXP_MASK
+#define USB_ENDPOINT_MAXP_MASK 0x07ff
+#endif
+#ifndef USB_EP_MAXP_MULT
+#define USB_EP_MAXP_MULT(m) (((m) & 0x1800) >> 11)
+#endif
+
+static void kill_all_requests(struct dwc2 *, struct dwc2_ep *, int);
+
+static inline struct dwc2_ep *index_to_ep(struct dwc2 *dwc2,
+ unsigned int ep, int in)
+{
+ if (ep >= DWC2_MAX_EPS_CHANNELS)
+ return NULL;
+ if (in)
+ return dwc2->eps_in[ep];
+ else
+ return dwc2->eps_out[ep];
+}
+
+static inline int using_dma(struct dwc2 *dwc2)
+{
+ /* Only buffer dma is supported */
+ return 1;
+}
+
+static void dwc2_dcfg_set_addr(struct dwc2 *dwc2, int addr)
+{
+ u32 dcfg = dwc2_readl(dwc2, DCFG);
+
+ dcfg &= ~DCFG_DEVADDR_MASK;
+ dcfg |= (addr << DCFG_DEVADDR_SHIFT) & DCFG_DEVADDR_MASK;
+ dwc2_writel(dwc2, dcfg, DCFG);
+}
+
+/**
+ * dwc2_hsotg_ctrl_epint - enable/disable an endpoint irq
+ * @hsotg: The device state
+ * @ep: The endpoint index
+ * @dir_in: True if direction is in.
+ * @en: The enable value, true to enable
+ *
+ * Set or clear the mask for an individual endpoint's interrupt
+ * request.
+ */
+static void dwc2_hsotg_ctrl_epint(struct dwc2 *dwc2,
+ unsigned int ep, unsigned int dir_in,
+ unsigned int en)
+{
+ unsigned long flags;
+ u32 bit = 1 << ep;
+ u32 daint;
+
+ if (!dir_in)
+ bit <<= 16;
+
+ local_irq_save(flags);
+ daint = dwc2_readl(dwc2, DAINTMSK);
+ if (en)
+ daint |= bit;
+ else
+ daint &= ~bit;
+ dwc2_writel(dwc2, daint, DAINTMSK);
+ local_irq_restore(flags);
+
+}
+
+/**
+ * get_ep_head - return the first request on the endpoint
+ * @hs_ep: The controller endpoint to get
+ *
+ * Get the first request on the endpoint.
+ */
+static struct dwc2_request *get_ep_head(struct dwc2_ep *hs_ep)
+{
+ return list_first_entry_or_null(&hs_ep->queue, struct dwc2_request,
+ queue);
+}
+
+/**
+ * get_ep_limit - get the maximum data legnth for this endpoint
+ * @hs_ep: The endpoint
+ *
+ * Return the maximum data that can be queued in one go on a given endpoint
+ * so that transfers that are too long can be split.
+ */
+static unsigned int get_ep_limit(struct dwc2_ep *hs_ep)
+{
+ int index = hs_ep->epnum;
+ unsigned int maxsize;
+ unsigned int maxpkt;
+
+ if (index != 0) {
+ maxsize = DXEPTSIZ_XFERSIZE_LIMIT + 1;
+ maxpkt = DXEPTSIZ_PKTCNT_LIMIT + 1;
+ } else {
+ maxsize = 64 + 64;
+ if (hs_ep->dir_in)
+ maxpkt = DIEPTSIZ0_PKTCNT_LIMIT + 1;
+ else
+ maxpkt = 2;
+ }
+
+ /* we made the constant loading easier above by using +1 */
+ maxpkt--;
+ maxsize--;
+
+ /*
+ * constrain by packet count if maxpkts*pktsize is greater
+ * than the length register size.
+ */
+
+ if ((maxpkt * hs_ep->ep.maxpacket) < maxsize)
+ maxsize = maxpkt * hs_ep->ep.maxpacket;
+
+ return maxsize;
+}
+
+static u32 dwc2_read_frameno(struct dwc2 *dwc2)
+{
+ u32 dsts;
+
+ dsts = dwc2_readl(dwc2, DSTS);
+ dsts &= DSTS_SOFFN_MASK;
+ dsts >>= DSTS_SOFFN_SHIFT;
+
+ return dsts;
+}
+
+/**
+ * dwc2_gadget_incr_frame_num - Increments the targeted frame number.
+ * @hs_ep: The endpoint
+ *
+ * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT.
+ * If an overrun occurs it will wrap the value and set the frame_overrun flag.
+ */
+static inline void dwc2_gadget_incr_frame_num(struct dwc2_ep *hs_ep)
+{
+ hs_ep->target_frame += hs_ep->interval;
+ if (hs_ep->target_frame > DSTS_SOFFN_LIMIT) {
+ hs_ep->frame_overrun = true;
+ hs_ep->target_frame &= DSTS_SOFFN_LIMIT;
+ } else {
+ hs_ep->frame_overrun = false;
+ }
+}
+
+/**
+ * dwc2_gadget_target_frame_elapsed - Checks target frame
+ * @hs_ep: The driver endpoint to check
+ *
+ * Returns 1 if targeted frame elapsed. If returned 1 then we need to drop
+ * corresponding transfer.
+ */
+static bool dwc2_gadget_target_frame_elapsed(struct dwc2_ep *hs_ep)
+{
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ u32 target_frame = hs_ep->target_frame;
+ u32 current_frame = dwc2->frame_number;
+ bool frame_overrun = hs_ep->frame_overrun;
+
+ if (!frame_overrun && current_frame >= target_frame)
+ return true;
+
+ if (frame_overrun && current_frame >= target_frame &&
+ ((current_frame - target_frame) < DSTS_SOFFN_LIMIT / 2))
+ return true;
+
+ return false;
+}
+
+
+/**
+ * dwc2_gadget_start_req - start a USB request from an endpoint's queue
+ * @dwc2: The controller state.
+ * @hs_ep: The endpoint to process a request for
+ * @hs_req: The request to start.
+ * @continuing: True if we are doing more for the current request.
+ *
+ * Start the given request running by setting the endpoint registers
+ * appropriately, and writing any data to the FIFOs.
+ */
+static void dwc2_gadget_start_req(struct dwc2 *dwc2,
+ struct dwc2_ep *hs_ep,
+ struct dwc2_request *hs_req,
+ bool continuing)
+{
+ struct usb_request *ureq = &hs_req->req;
+ int index = hs_ep->epnum;
+ int dir_in = hs_ep->dir_in;
+ u32 epctrl_reg;
+ u32 epsize_reg;
+ u32 epsize;
+ u32 ctrl;
+ unsigned int length;
+ unsigned int packets;
+ unsigned int maxreq;
+ unsigned int dma_reg;
+
+ if (index != 0) {
+ if (hs_ep->req && !continuing) {
+ dwc2_err(dwc2, "%s: active request\n", __func__);
+ WARN_ON(1);
+ return;
+ } else if (hs_ep->req != hs_req && continuing) {
+ dwc2_err(dwc2,
+ "%s: continue different req\n", __func__);
+ WARN_ON(1);
+ return;
+ }
+ }
+
+ dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index);
+ epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
+ epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
+
+ dwc2_dbg(dwc2, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n",
+ __func__, dwc2_readl(dwc2, epctrl_reg), index,
+ hs_ep->dir_in ? "in" : "out");
+
+ /* If endpoint is stalled, we will restart request later */
+ ctrl = dwc2_readl(dwc2, epctrl_reg);
+
+ if (index && ctrl & DXEPCTL_STALL) {
+ dwc2_warn(dwc2, "%s: ep%d is stalled\n", __func__, index);
+ return;
+ }
+
+ length = ureq->length - ureq->actual;
+ dwc2_dbg(dwc2, "ureq->length:%d ureq->actual:%d\n",
+ ureq->length, ureq->actual);
+
+ maxreq = get_ep_limit(hs_ep);
+
+ if (length > maxreq) {
+ int round = maxreq % hs_ep->ep.maxpacket;
+
+ dwc2_dbg(dwc2, "%s: length %d, max-req %d, r %d\n",
+ __func__, length, maxreq, round);
+
+ /* round down to multiple of packets */
+ if (round)
+ maxreq -= round;
+
+ length = maxreq;
+ }
+
+ if (length)
+ packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket);
+ else
+ packets = 1; /* send one packet if length is zero. */
+
+ if (dir_in && index != 0)
+ if (hs_ep->isochronous)
+ epsize = DXEPTSIZ_MC(packets);
+ else
+ epsize = DXEPTSIZ_MC(1);
+ else
+ epsize = 0;
+
+ /*
+ * zero length packet should be programmed on its own and should not
+ * be counted in DIEPTSIZ.PktCnt with other packets.
+ */
+ if (dir_in && ureq->zero && !continuing) {
+ /* Test if zlp is actually required. */
+ if ((ureq->length >= hs_ep->ep.maxpacket) &&
+ !(ureq->length % hs_ep->ep.maxpacket))
+ hs_ep->send_zlp = 1;
+ }
+
+ epsize |= DXEPTSIZ_PKTCNT(packets);
+ epsize |= DXEPTSIZ_XFERSIZE(length);
+
+ dwc2_dbg(dwc2, "%s: %d@%d/%d, 0x%08x => 0x%08x\n",
+ __func__, packets, length, ureq->length, epsize, epsize_reg);
+
+ /* store the request as the current one we're doing */
+ hs_ep->req = hs_req;
+
+ /* write size / packets */
+ dwc2_writel(dwc2, epsize, epsize_reg);
+
+ if (using_dma(dwc2) && !continuing && (length != 0)) {
+ /*
+ * write DMA address to control register, buffer
+ * already synced by dwc2_ep_queue().
+ */
+
+ dwc2_writel(dwc2, ureq->dma, dma_reg);
+
+ dwc2_dbg(dwc2, "%s: 0x%pad => 0x%08x\n",
+ __func__, (void *)ureq->dma, dma_reg);
+ }
+
+ if (hs_ep->isochronous && hs_ep->interval == 1) {
+ hs_ep->target_frame = dwc2_read_frameno(dwc2);
+ dwc2_gadget_incr_frame_num(hs_ep);
+
+ if (hs_ep->target_frame & 0x1)
+ ctrl |= DXEPCTL_SETODDFR;
+ else
+ ctrl |= DXEPCTL_SETEVENFR;
+ }
+
+ ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */
+
+ dwc2_dbg(dwc2, "%s: ep0 state:%d\n", __func__, dwc2->ep0_state);
+
+ /* For Setup request do not clear NAK */
+ if (!(index == 0 && dwc2->ep0_state == DWC2_EP0_SETUP))
+ ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */
+
+ dwc2_dbg(dwc2, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
+ dwc2_writel(dwc2, ctrl, epctrl_reg);
+
+ /*
+ * set these, it seems that DMA support increments past the end
+ * of the packet buffer so we need to calculate the length from
+ * this information.
+ */
+ hs_ep->size_loaded = length;
+ hs_ep->last_load = ureq->actual;
+
+ /*
+ * Note, trying to clear the NAK here causes problems with transmit
+ * on the S3C6400 ending up with the TXFIFO becoming full.
+ */
+
+ /* check ep is enabled */
+ if (!(dwc2_readl(dwc2, epctrl_reg) & DXEPCTL_EPENA))
+ dwc2_dbg(dwc2,
+ "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n",
+ index, dwc2_readl(dwc2, epctrl_reg));
+
+ dwc2_dbg(dwc2, "%s: DXEPCTL=0x%08x\n",
+ __func__, dwc2_readl(dwc2, epctrl_reg));
+
+ /* enable ep interrupts */
+ dwc2_hsotg_ctrl_epint(dwc2, hs_ep->epnum, hs_ep->dir_in, 1);
+}
+
+/* conversion functions */
+static inline struct dwc2_request *our_req(struct usb_request *req)
+{
+ return container_of(req, struct dwc2_request, req);
+}
+
+static inline struct dwc2_ep *our_ep(struct usb_ep *ep)
+{
+ return container_of(ep, struct dwc2_ep, ep);
+}
+
+
+/**
+ * dwc2_ep0_mps - turn max packet size into register setting
+ * @mps: The maximum packet size in bytes.
+ */
+static u32 dwc2_ep0_mps(unsigned int mps)
+{
+ switch (mps) {
+ case 64:
+ return D0EPCTL_MPS_64;
+ case 32:
+ return D0EPCTL_MPS_32;
+ case 16:
+ return D0EPCTL_MPS_16;
+ case 8:
+ return D0EPCTL_MPS_8;
+ }
+
+ /* bad max packet size, warn and return invalid result */
+ WARN_ON(1);
+ return (u32)-1;
+}
+
+/**
+ * dwc2_set_ep_maxpacket - set endpoint's max-packet field
+ * @dwc2: The driver state.
+ * @ep: The index number of the endpoint
+ * @mps: The maximum packet size in bytes
+ * @mc: The multicount value
+ * @dir_in: True if direction is in.
+ *
+ * Configure the maximum packet size for the given endpoint, updating
+ * the hardware control registers to reflect this.
+ */
+static void dwc2_set_ep_maxpacket(struct dwc2 *dwc2,
+ unsigned int ep, unsigned int mps,
+ unsigned int mc, unsigned int dir_in)
+{
+ struct dwc2_ep *hs_ep;
+ u32 reg;
+
+ hs_ep = index_to_ep(dwc2, ep, dir_in);
+ if (!hs_ep)
+ return;
+
+ if (ep == 0) {
+ u32 mps_bytes = mps;
+
+ /* EP0 is a special case */
+ mps = dwc2_ep0_mps(mps_bytes);
+ if (mps > 3)
+ goto bad_mps;
+ hs_ep->ep.maxpacket = mps_bytes;
+ hs_ep->mc = 1;
+ } else {
+ if (mps > 1024)
+ goto bad_mps;
+ hs_ep->mc = mc;
+ if (mc > 3)
+ goto bad_mps;
+ hs_ep->ep.maxpacket = mps;
+ }
+
+ if (dir_in) {
+ reg = dwc2_readl(dwc2, DIEPCTL(ep));
+ reg &= ~DXEPCTL_MPS_MASK;
+ reg |= mps;
+ dwc2_writel(dwc2, reg, DIEPCTL(ep));
+ } else {
+ reg = dwc2_readl(dwc2, DOEPCTL(ep));
+ reg &= ~DXEPCTL_MPS_MASK;
+ reg |= mps;
+ dwc2_writel(dwc2, reg, DOEPCTL(ep));
+ }
+
+ return;
+
+bad_mps:
+ dwc2_err(dwc2, "ep%d: bad mps of %d\n", ep, mps);
+}
+
+static int dwc2_ep_enable(struct usb_ep *ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ unsigned long flags;
+ unsigned int index = hs_ep->epnum;
+ u32 epctrl_reg;
+ u32 epctrl;
+ u32 mps;
+ u32 mc;
+ u32 mask;
+ unsigned int dir_in;
+ unsigned int i, val, size;
+ int ret = 0;
+ unsigned char ep_type;
+
+ dwc2_dbg(dwc2,
+ "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n",
+ __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes,
+ desc->wMaxPacketSize, desc->bInterval);
+
+ /* not to be called for EP0 */
+ if (index == 0) {
+ dwc2_err(dwc2, "%s: called for EP 0\n", __func__);
+ return -EINVAL;
+ }
+
+ dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
+ if (dir_in != hs_ep->dir_in) {
+ dwc2_err(dwc2, "%s: direction mismatch!\n", __func__);
+ return -EINVAL;
+ }
+
+ ep_type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+ mps = usb_endpoint_maxp(desc) & USB_ENDPOINT_MAXP_MASK;
+ mc = USB_EP_MAXP_MULT(usb_endpoint_maxp(desc));
+
+ /* note, we handle this here instead of dwc2_set_ep_maxpacket */
+ epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
+ epctrl = dwc2_readl(dwc2, epctrl_reg);
+
+ dwc2_dbg(dwc2, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
+ __func__, epctrl, epctrl_reg);
+
+ spin_lock_irqsave(&dwc2->lock, flags);
+
+ epctrl &= ~(DXEPCTL_EPTYPE_MASK | DXEPCTL_MPS_MASK);
+ epctrl |= DXEPCTL_MPS(mps);
+
+ /*
+ * mark the endpoint as active, otherwise the core may ignore
+ * transactions entirely for this endpoint
+ */
+ epctrl |= DXEPCTL_USBACTEP;
+
+ /* update the endpoint state */
+ dwc2_set_ep_maxpacket(dwc2, index, mps, mc, dir_in);
+
+ /* default, set to non-periodic */
+ hs_ep->isochronous = 0;
+ hs_ep->periodic = 0;
+ hs_ep->halted = 0;
+ hs_ep->interval = desc->bInterval;
+
+ switch (ep_type) {
+ case USB_ENDPOINT_XFER_ISOC:
+ epctrl |= DXEPCTL_EPTYPE_ISO;
+ epctrl |= DXEPCTL_SETEVENFR;
+ hs_ep->isochronous = 1;
+ hs_ep->interval = 1 << (desc->bInterval - 1);
+ hs_ep->target_frame = TARGET_FRAME_INITIAL;
+ if (dir_in) {
+ hs_ep->periodic = 1;
+ mask = dwc2_readl(dwc2, DIEPMSK);
+ mask |= DIEPMSK_NAKMSK;
+ dwc2_writel(dwc2, mask, DIEPMSK);
+ } else {
+ mask = dwc2_readl(dwc2, DOEPMSK);
+ mask |= DOEPMSK_OUTTKNEPDISMSK;
+ dwc2_writel(dwc2, mask, DOEPMSK);
+ }
+ break;
+
+ case USB_ENDPOINT_XFER_BULK:
+ epctrl |= DXEPCTL_EPTYPE_BULK;
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ if (dir_in)
+ hs_ep->periodic = 1;
+
+ if (dwc2->gadget.speed == USB_SPEED_HIGH)
+ hs_ep->interval = 1 << (desc->bInterval - 1);
+
+ epctrl |= DXEPCTL_EPTYPE_INTERRUPT;
+ break;
+
+ case USB_ENDPOINT_XFER_CONTROL:
+ epctrl |= DXEPCTL_EPTYPE_CONTROL;
+ break;
+ }
+
+ /*
+ * if the hardware has dedicated fifos, we must give each IN EP
+ * a unique tx-fifo even if it is non-periodic.
+ */
+ if (dir_in && dwc2->dedicated_fifos) {
+ unsigned int fifo_count = dwc2_tx_fifo_count(dwc2);
+ u32 fifo_index = 0;
+ u32 fifo_size = UINT_MAX;
+
+ size = hs_ep->ep.maxpacket * hs_ep->mc;
+ for (i = 1; i <= fifo_count; i++) {
+ if (dwc2->fifo_map & (1 << i))
+ continue;
+
+ val = dwc2_readl(dwc2, DPTXFSIZN(i));
+ val = (val >> FIFOSIZE_DEPTH_SHIFT) * 4;
+ if (val < size)
+ continue;
+ /* Search for smallest acceptable fifo */
+ if (val < fifo_size) {
+ fifo_size = val;
+ fifo_index = i;
+ }
+ }
+ if (!fifo_index) {
+ dwc2_err(dwc2,
+ "%s: No suitable fifo found\n", __func__);
+ ret = -ENOMEM;
+ goto error;
+ }
+ epctrl &= ~(DXEPCTL_TXFNUM_LIMIT << DXEPCTL_TXFNUM_SHIFT);
+ epctrl |= DXEPCTL_TXFNUM(fifo_index);
+ dwc2->fifo_map |= 1 << fifo_index;
+ hs_ep->fifo_index = fifo_index;
+ hs_ep->fifo_size = fifo_size;
+ }
+
+ /* for non control endpoints, set PID to D0 */
+ if (index && !hs_ep->isochronous)
+ epctrl |= DXEPCTL_SETD0PID;
+
+ dwc2_dbg(dwc2, "%s: write DxEPCTL=0x%08x\n",
+ __func__, epctrl);
+
+ dwc2_writel(dwc2, epctrl, epctrl_reg);
+ dwc2_dbg(dwc2, "%s: read DxEPCTL=0x%08x\n",
+ __func__, dwc2_readl(dwc2, epctrl_reg));
+
+ /* enable the endpoint interrupt */
+ dwc2_hsotg_ctrl_epint(dwc2, index, dir_in, 1);
+
+error:
+ spin_unlock_irqrestore(&dwc2->lock, flags);
+
+ return ret;
+}
+
+static void dwc2_ep_stop_xfr(struct dwc2 *dwc2, struct dwc2_ep *hs_ep)
+{
+ int in = hs_ep->dir_in;
+ int epnum = hs_ep->epnum;
+ u32 epctl_reg = in ? DIEPCTL(epnum) : DOEPCTL(epnum);
+ u32 epint_reg = in ? DIEPINT(epnum) : DOEPINT(epnum);
+
+ dwc2_dbg(dwc2, "%s: stopping transfer on %s\n", __func__,
+ hs_ep->name);
+
+ if (in) {
+ if (dwc2->dedicated_fifos || hs_ep->periodic) {
+ dwc2_set_bit(dwc2, epctl_reg, DXEPCTL_SNAK);
+ /* Wait for Nak effect */
+ if (dwc2_wait_bit_set(dwc2, epint_reg,
+ DXEPINT_INEPNAKEFF, 100))
+ dwc2_warn(dwc2,
+ "%s: timeout DIEPINT.NAKEFF\n",
+ __func__);
+ } else {
+ dwc2_set_bit(dwc2, DCTL, DCTL_SGNPINNAK);
+ /* Wait for Nak effect */
+ if (dwc2_wait_bit_set(dwc2, GINTSTS,
+ GINTSTS_GINNAKEFF, 100))
+ dwc2_warn(dwc2,
+ "%s: timeout GINTSTS.GINNAKEFF\n",
+ __func__);
+ }
+ } else {
+ if (!(dwc2_readl(dwc2, GINTSTS) & GINTSTS_GOUTNAKEFF))
+ dwc2_set_bit(dwc2, DCTL, DCTL_SGOUTNAK);
+
+ /* Wait for global nak to take effect */
+ if (dwc2_wait_bit_set(dwc2, GINTSTS,
+ GINTSTS_GOUTNAKEFF, 100))
+ dwc2_warn(dwc2, "%s: timeout GINTSTS.GOUTNAKEFF\n",
+ __func__);
+ }
+
+ /* Disable ep */
+ dwc2_set_bit(dwc2, epctl_reg, DXEPCTL_EPDIS | DXEPCTL_SNAK);
+
+ /* Wait for ep to be disabled */
+ if (dwc2_wait_bit_set(dwc2, epint_reg, DXEPINT_EPDISBLD, 100))
+ dwc2_warn(dwc2, "%s: timeout DOEPCTL.EPDisable\n", __func__);
+
+ /* Clear EPDISBLD interrupt */
+ dwc2_set_bit(dwc2, epint_reg, DXEPINT_EPDISBLD);
+
+ if (in) {
+ unsigned short fifo_index;
+
+ if (dwc2->dedicated_fifos || hs_ep->periodic)
+ fifo_index = hs_ep->fifo_index;
+ else
+ fifo_index = 0;
+
+ dwc2_flush_tx_fifo(dwc2, fifo_index);
+
+ /* Clear Global In NP NAK in Shared FIFO for non periodic ep */
+ if (!dwc2->dedicated_fifos && !hs_ep->periodic)
+ dwc2_set_bit(dwc2, DCTL, DCTL_CGNPINNAK);
+
+ } else {
+ /* Remove global NAKs */
+ dwc2_set_bit(dwc2, DCTL, DCTL_CGOUTNAK);
+ }
+}
+
+static int dwc2_ep_disable(struct usb_ep *ep)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ int dir_in = hs_ep->dir_in;
+ int index = hs_ep->epnum;
+ u32 epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
+ u32 ctrl;
+
+ dwc2_dbg(dwc2, "%s(ep %p)\n", __func__, ep);
+
+ if (index == 0) {
+ dwc2_err(dwc2, "%s: called for ep0\n", __func__);
+ return -EINVAL;
+ }
+
+ ctrl = dwc2_readl(dwc2, epctrl_reg);
+ if (ctrl & DXEPCTL_EPENA)
+ dwc2_ep_stop_xfr(dwc2, hs_ep);
+
+ ctrl &= ~DXEPCTL_EPENA;
+ ctrl &= ~DXEPCTL_USBACTEP;
+ ctrl |= DXEPCTL_SNAK;
+
+ dwc2_dbg(dwc2, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
+ dwc2_writel(dwc2, ctrl, epctrl_reg);
+
+ /* disable endpoint interrupts */
+ dwc2_hsotg_ctrl_epint(dwc2, index, hs_ep->dir_in, 0);
+
+ /* terminate all requests with shutdown */
+ kill_all_requests(dwc2, hs_ep, -ESHUTDOWN);
+
+ dwc2->fifo_map &= ~(1 << hs_ep->fifo_index);
+ hs_ep->fifo_index = 0;
+ hs_ep->fifo_size = 0;
+
+ return 0;
+}
+
+static struct usb_request *dwc2_ep_alloc_req(struct usb_ep *ep)
+{
+ struct dwc2_request *req;
+
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return NULL;
+
+ INIT_LIST_HEAD(&req->queue);
+
+ return &req->req;
+}
+
+static void dwc2_ep_free_req(struct usb_ep *ep, struct usb_request *req)
+{
+ struct dwc2_request *hs_req = our_req(req);
+
+ kfree(hs_req);
+}
+
+/**
+ * dwc2_start_next_request - Starts next request from ep queue
+ * @hs_ep: Endpoint structure
+ *
+ * If queue is empty and EP is ISOC-OUT - unmasks OUTTKNEPDIS which is masked
+ * in its handler. Hence we need to unmask it here to be able to do
+ * resynchronization.
+ */
+static void dwc2_start_next_request(struct dwc2_ep *hs_ep)
+{
+ u32 mask;
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ int dir_in = hs_ep->dir_in;
+ struct dwc2_request *hs_req;
+ u32 epmsk_reg = dir_in ? DIEPMSK : DOEPMSK;
+
+ dwc2_dbg(dwc2, "%s: next req\n", __func__);
+
+ if (!list_empty(&hs_ep->queue)) {
+ hs_req = get_ep_head(hs_ep);
+ dwc2_gadget_start_req(dwc2, hs_ep, hs_req, false);
+ return;
+ }
+ if (!hs_ep->isochronous)
+ return;
+
+ if (dir_in) {
+ dwc2_dbg(dwc2, "%s: No more ISOC-IN requests\n", __func__);
+ } else {
+ dwc2_dbg(dwc2, "%s: No more ISOC-OUT requests\n", __func__);
+ mask = dwc2_readl(dwc2, epmsk_reg);
+ mask |= DOEPMSK_OUTTKNEPDISMSK;
+ dwc2_writel(dwc2, mask, epmsk_reg);
+ }
+}
+
+static int dwc2_ep_queue(struct usb_ep *ep, struct usb_request *req)
+{
+
+ struct dwc2_request *hs_req = our_req(req);
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ bool first;
+
+ dwc2_dbg(dwc2, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n",
+ ep->name, req, req->length, req->buf, req->no_interrupt,
+ req->zero, req->short_not_ok);
+
+ /* initialise status of the request */
+ INIT_LIST_HEAD(&hs_req->queue);
+ req->actual = 0;
+ req->status = -EINPROGRESS;
+
+ /* Don't queue ISOC request if length greater than mps*mc */
+ if (hs_ep->isochronous &&
+ req->length > (hs_ep->mc * hs_ep->ep.maxpacket)) {
+ dwc2_err(dwc2, "req length > maxpacket*mc\n");
+ return -EINVAL;
+ }
+
+ if ((long)req->buf & 3)
+ dwc2_err(dwc2, "dma buffer not aligned\n");
+
+ req->dma = dma_map_single(dwc2->dev, req->buf, req->length,
+ hs_ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(dwc2->dev, req->dma)) {
+ dwc2_err(dwc2, "failed to map buffer\n");
+ return -EFAULT;
+ }
+
+ first = list_empty(&hs_ep->queue);
+ list_add_tail(&hs_req->queue, &hs_ep->queue);
+
+ /* Change EP direction if status phase request is after data out */
+ if (hs_ep->epnum == 0 && !req->length && !hs_ep->dir_in &&
+ dwc2->ep0_state == DWC2_EP0_DATA_OUT)
+ hs_ep->dir_in = 1;
+
+ if (first) {
+ if (!hs_ep->isochronous) {
+ dwc2_gadget_start_req(dwc2, hs_ep, hs_req, false);
+ return 0;
+ }
+
+ /* Update current frame number value. */
+ dwc2->frame_number = dwc2_read_frameno(dwc2);
+ while (dwc2_gadget_target_frame_elapsed(hs_ep)) {
+ dwc2_gadget_incr_frame_num(hs_ep);
+ /* Update current frame number value once more as it
+ * changes here.
+ */
+ dwc2->frame_number = dwc2_read_frameno(dwc2);
+ }
+
+ if (hs_ep->target_frame != TARGET_FRAME_INITIAL)
+ dwc2_gadget_start_req(dwc2, hs_ep, hs_req, false);
+ }
+ return 0;
+}
+
+static int dwc2_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ dwc2_warn(dwc2, "%s\n", __func__);
+ return -EOPNOTSUPP;
+}
+
+static int dwc2_ep_set_halt(struct usb_ep *ep, int value)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ dwc2_warn(dwc2, "%s\n", __func__);
+ return -EOPNOTSUPP;
+}
+
+static int dwc2_ep_set_wedge(struct usb_ep *ep)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ dwc2_warn(dwc2, "%s\n", __func__);
+ return -EOPNOTSUPP;
+}
+
+static int dwc2_ep_fifo_status(struct usb_ep *ep)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ dwc2_warn(dwc2, "%s\n", __func__);
+ return -EOPNOTSUPP;
+}
+
+static void dwc2_ep_fifo_flush(struct usb_ep *ep)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ dwc2_warn(dwc2, "%s\n", __func__);
+}
+
+static const struct usb_ep_ops dwc2_ep_ops = {
+ .enable = dwc2_ep_enable,
+ .disable = dwc2_ep_disable,
+ .alloc_request = dwc2_ep_alloc_req,
+ .free_request = dwc2_ep_free_req,
+ .queue = dwc2_ep_queue,
+ .dequeue = dwc2_ep_dequeue,
+ .set_halt = dwc2_ep_set_halt,
+ .set_wedge = dwc2_ep_set_wedge,
+ .fifo_status = dwc2_ep_fifo_status,
+ .fifo_flush = dwc2_ep_fifo_flush,
+};
+
+static void dwc2_program_zlp(struct dwc2 *dwc2, struct dwc2_ep *hs_ep)
+{
+ u32 ctrl;
+ u8 index = hs_ep->epnum;
+ u32 epctl_reg = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index);
+ u32 epsiz_reg = hs_ep->dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
+
+ if (hs_ep->dir_in)
+ dwc2_dbg(dwc2, "Sending zero-length packet on ep%d\n", index);
+ else
+ dwc2_dbg(dwc2, "Receiving zero-length packet on ep%d\n", index);
+
+ dwc2_writel(dwc2, DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) |
+ DXEPTSIZ_XFERSIZE(0),
+ epsiz_reg);
+
+ ctrl = dwc2_readl(dwc2, epctl_reg);
+ ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */
+ ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */
+ ctrl |= DXEPCTL_USBACTEP;
+ dwc2_writel(dwc2, ctrl, epctl_reg);
+}
+
+/**
+ * windex_to_ep - convert control wIndex value to endpoint
+ * @dwc2: The driver state.
+ * @windex: The control request wIndex field (in host order).
+ *
+ * Convert the given wIndex into a pointer to an driver endpoint
+ * structure, or return NULL if it is not a valid endpoint.
+ */
+static struct dwc2_ep *windex_to_ep(struct dwc2 *dwc2, u16 windex)
+{
+ struct dwc2_ep *ep;
+ int dir = (windex & USB_DIR_IN) ? 1 : 0;
+ int idx = windex & 0x7F;
+
+ if (windex >= 0x100)
+ return NULL;
+
+ if (idx >= dwc2->num_eps)
+ return NULL;
+
+ ep = index_to_ep(dwc2, idx, dir);
+
+ if (idx && ep->dir_in != dir)
+ return NULL;
+
+ return ep;
+}
+
+/**
+ * dwc2_hsotg_send_reply - send reply to control request
+ * @dwc2: The device state
+ * @buff: Buffer for request
+ * @length: Length of reply.
+ *
+ * Create a request and queue it on the given endpoint. This is useful as
+ * an internal method of sending replies to certain control requests, etc.
+ */
+static int dwc2_hsotg_send_reply(struct dwc2 *dwc2, void *buff, int length)
+{
+ struct dwc2_ep *ep0 = dwc2->eps_out[0];
+ struct usb_request *req;
+ int ret;
+
+ if (length == 0 && (dwc2->ep0_state == DWC2_EP0_STATUS_IN ||
+ dwc2->ep0_state == DWC2_EP0_STATUS_OUT)) {
+ dwc2_program_zlp(dwc2, ep0);
+ return 0;
+ }
+
+ dwc2_dbg(dwc2, "%s: buff %p, len %d\n", __func__, buff, length);
+
+ req = dwc2_ep_alloc_req(&ep0->ep);
+ if (!req) {
+ dwc2_warn(dwc2, "%s: cannot alloc req\n", __func__);
+ return -ENOMEM;
+ }
+
+ req->buf = dwc2->ep0_buff;
+ req->length = length;
+ /*
+ * zero flag is for sending zlp in DATA IN stage. It has no impact on
+ * STATUS stage.
+ */
+ req->zero = 0;
+ req->complete = dwc2_ep_free_req;
+
+ if (length)
+ memcpy(req->buf, buff, length);
+
+ ret = dwc2_ep_queue(&ep0->ep, req);
+ if (ret) {
+ dwc2_warn(dwc2, "%s: cannot queue req\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * dwc2_process_req_status - process request GET_STATUS
+ * @dwc2: The device state
+ * @ctrl: USB control request
+ */
+static int dwc2_process_req_status(struct dwc2 *dwc2,
+ struct usb_ctrlrequest *ctrl)
+{
+ struct dwc2_ep *ep0 = dwc2->eps_out[0];
+ struct dwc2_ep *ep;
+ __le16 reply;
+ u16 status;
+ int ret;
+
+ dwc2_dbg(dwc2, "%s: USB_REQ_GET_STATUS\n", __func__);
+
+ if (!ep0->dir_in) {
+ dwc2_warn(dwc2, "%s: direction out?\n", __func__);
+ return -EINVAL;
+ }
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ status = dwc2->is_selfpowered << USB_DEVICE_SELF_POWERED;
+ status |= 0 << USB_DEVICE_REMOTE_WAKEUP;
+
+ reply = cpu_to_le16(status);
+ break;
+
+ case USB_RECIP_INTERFACE:
+ /* currently, the data result should be zero */
+ reply = cpu_to_le16(0);
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ ep = windex_to_ep(dwc2, le16_to_cpu(ctrl->wIndex));
+ if (!ep)
+ return -ENOENT;
+
+ reply = cpu_to_le16(ep->halted ? 1 : 0);
+ break;
+
+ default:
+ return 0;
+ }
+
+ if (le16_to_cpu(ctrl->wLength) != 2)
+ return -EINVAL;
+
+ ret = dwc2_hsotg_send_reply(dwc2, &reply, 2);
+ if (ret) {
+ dwc2_err(dwc2, "%s: failed to send reply\n", __func__);
+ return ret;
+ }
+
+ return 1;
+}
+
+/**
+ * dwc2_process_req_feature - process request {SET,CLEAR}_FEATURE
+ * @dwc2: The device state
+ * @ctrl: USB control request
+ */
+static int dwc2_process_req_feature(struct dwc2 *dwc2,
+ struct usb_ctrlrequest *ctrl)
+{
+ struct dwc2_request *hs_req;
+ bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE);
+ struct dwc2_ep *ep;
+ int ret;
+ bool halted;
+ u32 recip;
+ u16 wValue;
+ u16 wIndex;
+
+ dwc2_dbg(dwc2, "%s: %s_FEATURE\n", __func__, set ? "SET" : "CLEAR");
+
+ wValue = le16_to_cpu(ctrl->wValue);
+ wIndex = le16_to_cpu(ctrl->wIndex);
+ recip = ctrl->bRequestType & USB_RECIP_MASK;
+
+ switch (recip) {
+ case USB_RECIP_DEVICE:
+ switch (wValue) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ case USB_DEVICE_TEST_MODE:
+ /* Not supported */
+ default:
+ return -ENOENT;
+ }
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ ep = windex_to_ep(dwc2, wIndex);
+ if (!ep)
+ return -ENOENT;
+
+ switch (wValue) {
+ case USB_ENDPOINT_HALT:
+ halted = ep->halted;
+
+ dwc2_ep_set_halt(&ep->ep, set);
+
+ ret = dwc2_hsotg_send_reply(dwc2, NULL, 0);
+ if (ret) {
+ dwc2_err(dwc2,
+ "%s: failed to send reply\n", __func__);
+ return ret;
+ }
+
+ /*
+ * we have to complete all requests for ep if it was
+ * halted, and the halt was cleared by CLEAR_FEATURE
+ */
+
+ if (!set && halted) {
+ /*
+ * If we have request in progress,
+ * then complete it
+ */
+ if (ep->req) {
+ hs_req = ep->req;
+ ep->req = NULL;
+ list_del_init(&hs_req->queue);
+ if (hs_req->req.complete) {
+ spin_unlock(&dwc2->lock);
+ hs_req->req.complete(
+ &ep->ep, &hs_req->req);
+ spin_lock(&dwc2->lock);
+ }
+ }
+
+ /* If we have pending request, then start it */
+ if (!ep->req)
+ dwc2_start_next_request(ep);
+ }
+
+ break;
+
+ default:
+ return -ENOENT;
+ }
+ break;
+ default:
+ return -ENOENT;
+ }
+ return 1;
+}
+
+static int dwc2_gadget_get_frame(struct usb_gadget *gadget)
+{
+ return dwc2_read_frameno(to_dwc2(gadget));
+}
+
+static void dwc2_core_disconnect(struct dwc2 *dwc2)
+{
+ u32 dctl;
+
+ dctl = dwc2_readl(dwc2, DCTL);
+ /* set the soft-disconnect bit */
+ dctl |= DCTL_SFTDISCON;
+ dwc2_writel(dwc2, dctl, DCTL);
+}
+
+static void dwc2_core_connect(struct dwc2 *dwc2)
+{
+ u32 dctl;
+
+ dctl = dwc2_readl(dwc2, DCTL);
+ /* clear the soft-disconnect bit */
+ dctl &= ~DCTL_SFTDISCON;
+ dwc2_writel(dwc2, dctl, DCTL);
+}
+
+static void dwc2_enqueue_setup(struct dwc2 *dwc2);
+
+/**
+ * dwc2_stall_ep0 - stall ep0
+ * @dwc2: The device state
+ *
+ * Set stall for ep0 as response for setup request.
+ */
+static void dwc2_stall_ep0(struct dwc2 *dwc2)
+{
+ struct dwc2_ep *ep0 = dwc2->eps_out[0];
+ u32 reg;
+ u32 ctrl;
+
+ dwc2_dbg(dwc2, "ep0 stall (dir=%d)\n", ep0->dir_in);
+ reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0;
+
+ /*
+ * DxEPCTL_Stall will be cleared by EP once it has
+ * taken effect, so no need to clear later.
+ */
+
+ ctrl = dwc2_readl(dwc2, reg);
+ ctrl |= DXEPCTL_STALL;
+ ctrl |= DXEPCTL_CNAK;
+ dwc2_writel(dwc2, ctrl, reg);
+
+ dwc2_dbg(dwc2,
+ "written DXEPCTL=0x%08x to %08x (DXEPCTL=0x%08x)\n",
+ ctrl, reg, dwc2_readl(dwc2, reg));
+
+ /*
+ * complete won't be called, so we enqueue
+ * setup request here
+ */
+ dwc2_enqueue_setup(dwc2);
+}
+
+/**
+ * dwc2_process_control - process a control request
+ * @dwc2: The device state
+ * @ctrl: The control request received
+ *
+ * The controller has received the SETUP phase of a control request, and
+ * needs to work out what to do next (and whether to pass it on to the
+ * gadget driver).
+ */
+static void dwc2_process_control(struct dwc2 *dwc2,
+ struct usb_ctrlrequest *ctrl)
+{
+ struct dwc2_ep *ep0 = dwc2->eps_out[0];
+ int handled = false;
+ int ret = 0;
+
+ dwc2_dbg(dwc2,
+ "ctrl Type=%02x, Req=%02x, V=%04x, I=%04x, L=%04x\n",
+ ctrl->bRequestType, ctrl->bRequest, ctrl->wValue,
+ ctrl->wIndex, ctrl->wLength);
+
+ if (ctrl->wLength == 0) {
+ ep0->dir_in = 1;
+ dwc2->ep0_state = DWC2_EP0_STATUS_IN;
+ } else if (ctrl->bRequestType & USB_DIR_IN) {
+ ep0->dir_in = 1;
+ dwc2->ep0_state = DWC2_EP0_DATA_IN;
+ } else {
+ ep0->dir_in = 0;
+ dwc2->ep0_state = DWC2_EP0_DATA_OUT;
+ }
+
+ if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (ctrl->bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ dwc2->connected = 1;
+ dwc2_dcfg_set_addr(dwc2, le16_to_cpu(ctrl->wValue));
+ ret = dwc2_hsotg_send_reply(dwc2, NULL, 0);
+ handled = true;
+ dwc2_info(dwc2, "new address %d\n", ctrl->wValue);
+ break;
+
+ case USB_REQ_GET_STATUS:
+ ret = dwc2_process_req_status(dwc2, ctrl);
+ handled = true;
+ break;
+
+ case USB_REQ_CLEAR_FEATURE:
+ case USB_REQ_SET_FEATURE:
+ ret = dwc2_process_req_feature(dwc2, ctrl);
+ handled = true;
+ break;
+ }
+ }
+
+ /* as a fallback, try delivering it to the driver to deal with */
+ if (!handled && dwc2->driver) {
+ spin_unlock(&dwc2->lock);
+ ret = dwc2->driver->setup(&dwc2->gadget, ctrl);
+ spin_lock(&dwc2->lock);
+ if (ret < 0)
+ dwc2_dbg(dwc2, "driver->setup() ret %d\n", ret);
+ }
+
+ /*
+ * the request is either unhandlable, or is not formatted correctly
+ * so respond with a STALL for the status stage to indicate failure.
+ */
+
+ if (ret < 0) {
+ dwc2_dbg(dwc2, "unhandled ctrl request ");
+ dwc2_stall_ep0(dwc2);
+ }
+}
+
+/**
+ * dwc2_complete_setup - completion of a setup transfer
+ * @ep: The endpoint the request was on.
+ * @req: The request completed.
+ *
+ * Called on completion of any requests the driver itself submitted for
+ * EP0 setup packets
+ */
+static void dwc2_complete_setup(struct usb_ep *ep, struct usb_request *req)
+{
+ struct dwc2_ep *hs_ep = our_ep(ep);
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+
+ if (req->status < 0) {
+ dwc2_dbg(dwc2, "%s: failed %d\n", __func__, req->status);
+ return;
+ }
+
+ spin_lock(&dwc2->lock);
+ if (req->actual == 0)
+ dwc2_enqueue_setup(dwc2);
+ else
+ dwc2_process_control(dwc2, req->buf);
+ spin_unlock(&dwc2->lock);
+}
+
+static void dwc2_enqueue_setup(struct dwc2 *dwc2)
+{
+ struct usb_request *req = dwc2->ctrl_req;
+ struct dwc2_request *hs_req = our_req(req);
+ int ret;
+
+ dwc2_dbg(dwc2, "%s: queueing setup request\n", __func__);
+
+ req->zero = 0;
+ req->length = 8;
+ req->buf = dwc2->ctrl_buff;
+ req->complete = dwc2_complete_setup;
+
+ if (!list_empty(&hs_req->queue)) {
+ dwc2_dbg(dwc2, "%s already queued???\n", __func__);
+ return;
+ }
+
+ dwc2->eps_out[0]->dir_in = 0;
+ dwc2->eps_out[0]->send_zlp = 0;
+ dwc2->ep0_state = DWC2_EP0_SETUP;
+
+ ret = dwc2_ep_queue(&dwc2->eps_out[0]->ep, req);
+ if (ret < 0) {
+ dwc2_err(dwc2, "%s: failed queue (%d)\n", __func__, ret);
+ /*
+ * Don't think there's much we can do other than watch the
+ * driver fail.
+ */
+ }
+}
+
+/**
+ * dwc2_complete_request - complete a request given to us
+ * @dwc2: The device state.
+ * @hs_ep: The endpoint the request was on.
+ * @hs_req: The request to complete.
+ * @result: The result code (0 => Ok, otherwise errno)
+ *
+ * The given request has finished, so call the necessary completion
+ * if it has one and then look to see if we can start a new request
+ * on the endpoint.
+ *
+ * Note, expects the ep to already be locked as appropriate.
+ */
+static void dwc2_complete_request(struct dwc2 *dwc2, struct dwc2_ep *hs_ep,
+ struct dwc2_request *hs_req, int status)
+{
+ if (!hs_req) {
+ dwc2_dbg(dwc2, "%s: nothing to complete?\n", __func__);
+ return;
+ }
+
+ dwc2_dbg(dwc2, "complete: ep %p %s, req %p, %d => %p\n",
+ hs_ep, hs_ep->ep.name, hs_req, status, hs_req->req.complete);
+
+ /*
+ * only replace the status if we've not already set an error
+ * from a previous transaction
+ */
+
+ if (hs_req->req.status == -EINPROGRESS)
+ hs_req->req.status = status;
+
+ dma_unmap_single(dwc2->dev, hs_req->req.dma, hs_req->req.length,
+ hs_ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ hs_ep->req = NULL;
+ list_del_init(&hs_req->queue);
+
+ /*
+ * call the complete request with the locks off, just in case the
+ * request tries to queue more work for this endpoint.
+ */
+
+ if (hs_req->req.complete) {
+ spin_unlock(&dwc2->lock);
+ hs_req->req.complete(&hs_ep->ep, &hs_req->req);
+ spin_lock(&dwc2->lock);
+ }
+
+ /*
+ * Look to see if there is anything else to do. Note, the completion
+ * of the previous request may have caused a new request to be started
+ * so be careful when doing this.
+ */
+ dwc2_dbg(dwc2, "%s: req %p, status %d\n", __func__, hs_ep->req, status);
+ if (!hs_ep->req && status >= 0)
+ dwc2_start_next_request(hs_ep);
+}
+
+/**
+ * dwc2_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO
+ * @dwc2: The device instance
+ * @epnum: The endpoint received from
+ *
+ * The RXFIFO has delivered an OutDone event, which means that the data
+ * transfer for an OUT endpoint has been completed, either by a short
+ * packet or by the finish of a transfer.
+ */
+static void dwc2_handle_outdone(struct dwc2 *dwc2, int epnum)
+{
+ u32 epsize = dwc2_readl(dwc2, DOEPTSIZ(epnum));
+ struct dwc2_ep *hs_ep = dwc2->eps_out[epnum];
+ struct dwc2_request *hs_req = hs_ep->req;
+ struct usb_request *req = &hs_req->req;
+ unsigned int size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
+ int result = 0;
+
+ if (!hs_req) {
+ dwc2_dbg(dwc2, "%s: no request active\n", __func__);
+ return;
+ }
+
+ if (epnum == 0 && dwc2->ep0_state == DWC2_EP0_STATUS_OUT) {
+ dwc2_dbg(dwc2, "zlp packet received\n");
+ dwc2_complete_request(dwc2, hs_ep, hs_req, 0);
+ dwc2_enqueue_setup(dwc2);
+ return;
+ }
+
+ if (using_dma(dwc2)) {
+ unsigned int size_done;
+
+ /*
+ * Calculate the size of the transfer by checking how much
+ * is left in the endpoint size register and then working it
+ * out from the amount we loaded for the transfer.
+ *
+ * We need to do this as DMA pointers are always 32bit aligned
+ * so may overshoot/undershoot the transfer.
+ */
+ size_done = hs_ep->size_loaded - size_left;
+ size_done += hs_ep->last_load;
+
+ req->actual = size_done;
+ }
+
+ if (req->actual < req->length && size_left == 0) {
+ dwc2_gadget_start_req(dwc2, hs_ep, hs_req, true);
+ return;
+ }
+
+ if (req->actual < req->length && req->short_not_ok) {
+ dwc2_dbg(dwc2, "%s: got %d/%d (short not ok) => error\n",
+ __func__, req->actual, req->length);
+
+ /*
+ * todo - what should we return here? there's no one else
+ * even bothering to check the status.
+ */
+ }
+
+ if (epnum == 0 && dwc2->ep0_state == DWC2_EP0_DATA_OUT) {
+ /* Move to STATUS IN */
+ dwc2->eps_out[0]->dir_in = 1;
+ dwc2->ep0_state = DWC2_EP0_STATUS_IN;
+ dwc2_program_zlp(dwc2, dwc2->eps_out[0]);
+ }
+
+ /*
+ * Slave mode OUT transfers do not go through XferComplete so
+ * adjust the ISOC parity here.
+ */
+#if 0
+ if (!using_dma(dwc2)) {
+ if (hs_ep->isochronous && hs_ep->interval == 1)
+ dwc2_hsotg_change_ep_iso_parity(dwc2, DOEPCTL(epnum));
+ else if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
+ }
+
+ /* Set actual frame number for completed transfers */
+ if (hs_ep->isochronous)
+ req->frame_number = dwc2->frame_number;
+#endif
+
+ dwc2_complete_request(dwc2, hs_ep, hs_req, result);
+}
+
+/**
+ * kill_all_requests - remove all requests from the endpoint's queue
+ * @dwc2: The device state.
+ * @ep: The endpoint the requests may be on.
+ * @result: The result code to use.
+ *
+ * Go through the requests on the given endpoint and mark them
+ * completed with the given result code.
+ */
+static void kill_all_requests(struct dwc2 *dwc2, struct dwc2_ep *ep, int result)
+{
+ struct dwc2_request *req, *treq;
+ unsigned int size;
+
+ ep->req = NULL;
+
+ list_for_each_entry_safe(req, treq, &ep->queue, queue)
+ dwc2_complete_request(dwc2, ep, req, result);
+
+ if (!dwc2->dedicated_fifos)
+ return;
+ size = (dwc2_readl(dwc2, DTXFSTS(ep->fifo_index)) & 0xffff) * 4;
+ if (size < ep->fifo_size)
+ dwc2_flush_tx_fifo(dwc2, ep->fifo_index);
+}
+
+/**
+ * dwc2_gadget_disconnect - disconnect service
+ * @dwc2: The device state.
+ *
+ * The device has been disconnected. Remove all current
+ * transactions and signal the gadget driver that this
+ * has happened.
+ */
+static void dwc2_gadget_disconnect(struct dwc2 *dwc2)
+{
+
+ unsigned int ep;
+
+ if (!dwc2->connected)
+ return;
+
+ dwc2->connected = 0;
+
+ /* all endpoints should be shutdown */
+ for (ep = 0; ep < dwc2->num_eps; ep++) {
+ if (dwc2->eps_in[ep])
+ kill_all_requests(dwc2, dwc2->eps_in[ep], -ESHUTDOWN);
+ if (dwc2->eps_out[ep])
+ kill_all_requests(dwc2, dwc2->eps_out[ep], -ESHUTDOWN);
+ }
+
+ spin_unlock(&dwc2->lock);
+ dwc2->driver->disconnect(&dwc2->gadget);
+ spin_lock(&dwc2->lock);
+
+ usb_gadget_set_state(&dwc2->gadget, USB_STATE_NOTATTACHED);
+}
+
+static void dwc2_gadget_setup_fifo(struct dwc2 *dwc2)
+{
+ unsigned int ep;
+ unsigned int addr;
+ u32 np_tx_fifo_size = dwc2->params.g_np_tx_fifo_size;
+ u32 rx_fifo_size = dwc2->params.g_rx_fifo_size;
+ u32 fifo_size = dwc2->hw_params.total_fifo_size;
+ u32 *tx_fifo_size = dwc2->params.g_tx_fifo_size;
+ u32 size, depth;
+ u32 txfsz;
+
+ /* Reset fifo map if not correctly cleared during previous session */
+ WARN_ON(dwc2->fifo_map);
+ dwc2->fifo_map = 0;
+
+ /* set RX/NPTX FIFO sizes */
+ dwc2_writel(dwc2, rx_fifo_size, GRXFSIZ);
+ size = rx_fifo_size << FIFOSIZE_STARTADDR_SHIFT;
+ size |= np_tx_fifo_size << FIFOSIZE_DEPTH_SHIFT;
+ dwc2_writel(dwc2, size, GNPTXFSIZ);
+
+ /*
+ * arange all the rest of the TX FIFOs, as some versions of this
+ * block have overlapping default addresses. This also ensures
+ * that if the settings have been changed, then they are set to
+ * known values.
+ */
+
+ /* start at the end of the GNPTXFSIZ, rounded up */
+ addr = rx_fifo_size + np_tx_fifo_size;
+
+ /*
+ * Configure fifos sizes from provided configuration and assign
+ * them to endpoints dynamically according to maxpacket size value of
+ * given endpoint.
+ */
+
+ for (ep = 1; ep < dwc2->num_eps; ep++) {
+ txfsz = dwc2_readl(dwc2, DPTXFSIZN(ep));
+ depth = tx_fifo_size[ep];
+
+ if (addr + depth > fifo_size)
+ dwc2_err(dwc2, "insufficient fifo memory\n");
+
+ txfsz = depth << FIFOSIZE_DEPTH_SHIFT;
+ txfsz |= addr & 0xffff;
+ dwc2_writel(dwc2, txfsz, DPTXFSIZN(ep));
+
+ addr += depth;
+ }
+
+ dwc2_writel(dwc2, dwc2->hw_params.total_fifo_size |
+ addr << GDFIFOCFG_EPINFOBASE_SHIFT,
+ GDFIFOCFG);
+
+ dwc2_flush_all_fifo(dwc2);
+}
+
+static void dwc2_gadget_interrupt_init(struct dwc2 *dwc2)
+{
+ /* unmask subset of endpoint interrupts */
+ dwc2_writel(dwc2, DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK |
+ DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK,
+ DIEPMSK);
+
+ dwc2_writel(dwc2, DOEPMSK_SETUPMSK | DOEPMSK_AHBERRMSK |
+ DOEPMSK_EPDISBLDMSK | DOEPMSK_XFERCOMPLMSK,
+ DOEPMSK);
+
+ dwc2_writel(dwc2, 0, DAINTMSK);
+}
+
+/**
+ * dwc2_complete_in - complete IN transfer
+ * @dwc2: The device state.
+ * @hs_ep: The endpoint that has just completed.
+ *
+ * An IN transfer has been completed, update the transfer's state and then
+ * call the relevant completion routines.
+ */
+static void dwc2_complete_in(struct dwc2 *dwc2, struct dwc2_ep *hs_ep)
+{
+ struct dwc2_request *hs_req = hs_ep->req;
+ u32 epsize = dwc2_readl(dwc2, DIEPTSIZ(hs_ep->epnum));
+ int size_left, size_done;
+
+ if (!hs_req) {
+ dwc2_dbg(dwc2, "XferCompl but no req\n");
+ return;
+ }
+
+ /* Finish ZLP handling for IN EP0 transactions */
+ if (hs_ep->epnum == 0 && dwc2->ep0_state == DWC2_EP0_STATUS_IN) {
+ dwc2_dbg(dwc2, "zlp packet sent\n");
+ /*
+ * While send zlp for DWC2_EP0_STATUS_IN EP direction was
+ * changed to IN. Change back to complete OUT transfer request
+ */
+ hs_ep->dir_in = 0;
+ dwc2_complete_request(dwc2, hs_ep, hs_req, 0);
+ dwc2_enqueue_setup(dwc2);
+ return;
+ }
+
+ /*
+ * Calculate the size of the transfer by checking how much is left
+ * in the endpoint size register and then working it out from
+ * the amount we loaded for the transfer.
+ *
+ * We do this even for DMA, as the transfer may have incremented
+ * past the end of the buffer (DMA transfers are always 32bit
+ * aligned).
+ */
+ size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
+
+ size_done = hs_ep->size_loaded - size_left;
+ size_done += hs_ep->last_load;
+
+ if (hs_req->req.actual != size_done)
+ dwc2_dbg(dwc2, "%s: adjusting size done %d => %d\n",
+ __func__, hs_req->req.actual, size_done);
+
+ hs_req->req.actual = size_done;
+ dwc2_dbg(dwc2, "req->length:%d req->actual:%d req->zero:%d\n",
+ hs_req->req.length, hs_req->req.actual, hs_req->req.zero);
+
+ if (!size_left && hs_req->req.actual < hs_req->req.length) {
+ dwc2_dbg(dwc2, "%s trying more for req...\n", __func__);
+ dwc2_gadget_start_req(dwc2, hs_ep, hs_req, true);
+ return;
+ }
+
+ /* Zlp for all endpoints, for ep0 only in DATA IN stage */
+ if (hs_ep->send_zlp) {
+ dwc2_program_zlp(dwc2, hs_ep);
+ hs_ep->send_zlp = 0;
+ /* transfer will be completed on next complete interrupt */
+ return;
+ }
+
+ if (hs_ep->epnum == 0 && dwc2->ep0_state == DWC2_EP0_DATA_IN) {
+ /* Move to STATUS OUT */
+ dwc2->eps_out[0]->dir_in = 0;
+ dwc2->ep0_state = DWC2_EP0_STATUS_OUT;
+ dwc2_program_zlp(dwc2, dwc2->eps_out[0]);
+ return;
+ }
+
+ dwc2_complete_request(dwc2, hs_ep, hs_req, 0);
+}
+
+/**
+ * dwc2_core_gadget_init - issue softreset to the core
+ * @dwc2: The device state
+ * @usb_reset: Usb resetting flag
+ *
+ * Issue a soft reset to the core, and await the core finishing it.
+ */
+static void dwc2_core_gadget_init(struct dwc2 *dwc2, bool usb_reset)
+{
+ u32 intmsk;
+ u32 dctl;
+ u32 usbcfg;
+ u32 dcfg;
+ int ep;
+
+ /* Kill any ep0 requests as controller will be reinitialized */
+ kill_all_requests(dwc2, dwc2->eps_out[0], -ECONNRESET);
+
+ if (!usb_reset) {
+ if (dwc2_core_reset(dwc2))
+ return;
+ } else {
+ /* all endpoints should be shutdown */
+ for (ep = 1; ep < dwc2->num_eps; ep++) {
+ if (dwc2->eps_in[ep])
+ dwc2_ep_disable(&dwc2->eps_in[ep]->ep);
+ if (dwc2->eps_out[ep])
+ dwc2_ep_disable(&dwc2->eps_out[ep]->ep);
+ }
+ }
+
+ /*
+ * we must now enable ep0 ready for host detection and then
+ * set configuration.
+ */
+
+ /* keep other bits untouched (so e.g. forced modes are not lost) */
+ usbcfg = dwc2_readl(dwc2, GUSBCFG);
+ usbcfg &= ~GUSBCFG_TOUTCAL_MASK;
+ usbcfg |= GUSBCFG_TOUTCAL(7);
+ dwc2_writel(dwc2, usbcfg, GUSBCFG);
+
+ dwc2_phy_init(dwc2, true);
+
+ dwc2_gadget_setup_fifo(dwc2);
+
+ if (!usb_reset)
+ dwc2_core_disconnect(dwc2);
+
+ dcfg = DCFG_EPMISCNT(1);
+
+ if (dwc2->params.speed == DWC2_SPEED_PARAM_LOW) {
+ dcfg |= DCFG_DEVSPD_LS;
+ } else if (dwc2->params.speed == DWC2_SPEED_PARAM_FULL &&
+ dwc2->params.phy_type == DWC2_PHY_TYPE_PARAM_FS) {
+ dcfg |= DCFG_DEVSPD_FS48;
+ } else if (dwc2->params.speed == DWC2_SPEED_PARAM_FULL &&
+ dwc2->params.phy_type != DWC2_PHY_TYPE_PARAM_FS) {
+ dcfg |= DCFG_DEVSPD_FS;
+ }
+
+ if (dwc2->params.ipg_isoc_en)
+ dcfg |= DCFG_IPG_ISOC_SUPPORDED;
+
+ dwc2_writel(dwc2, dcfg, DCFG);
+
+ /* Clear any pending OTG interrupts */
+ dwc2_writel(dwc2, 0xffffffff, GOTGINT);
+
+ /* Clear any pending interrupts */
+ dwc2_writel(dwc2, 0xffffffff, GINTSTS);
+ intmsk = GINTSTS_ERLYSUSP |
+ GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF |
+ GINTSTS_USBRST | GINTSTS_RESETDET |
+ GINTSTS_ENUMDONE |
+ GINTSTS_USBSUSP | GINTSTS_WKUPINT |
+ GINTSTS_LPMTRANRCVD;
+
+ intmsk |= GINTSTS_INCOMPL_SOIN | GINTSTS_INCOMPL_SOOUT;
+
+ /* enable in and out endpoint interrupts */
+ intmsk |= GINTSTS_OEPINT | GINTSTS_IEPINT;
+
+ /*
+ * Enable the RXFIFO when in slave mode, as this is how we collect
+ * the data. In DMA mode, we get events from the FIFO but also
+ * things we cannot process, so do not use it.
+ */
+ if (!using_dma(dwc2))
+ intmsk |= GINTSTS_RXFLVL;
+
+ if (!dwc2->params.external_id_pin_ctl)
+ intmsk |= GINTSTS_CONIDSTSCHNG;
+
+ dwc2_writel(dwc2, intmsk, GINTMSK);
+
+ dwc2_gahbcfg_init(dwc2);
+
+ /*
+ * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts
+ * when we have no data to transfer. Otherwise we get being flooded by
+ * interrupts.
+ */
+ intmsk = DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK |
+ DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK;
+
+ if (dwc2->dedicated_fifos && !using_dma(dwc2))
+ intmsk |= DIEPMSK_TXFIFOEMPTY | DIEPMSK_INTKNTXFEMPMSK;
+
+ dwc2_writel(dwc2, intmsk, DIEPMSK);
+
+ /*
+ * don't need XferCompl, we get that from RXFIFO in slave mode. In
+ * DMA mode we may need this and StsPhseRcvd.
+ */
+ intmsk = DOEPMSK_EPDISBLDMSK | DOEPMSK_AHBERRMSK | DOEPMSK_SETUPMSK;
+ if (using_dma(dwc2))
+ intmsk |= DIEPMSK_XFERCOMPLMSK | DOEPMSK_STSPHSERCVDMSK;
+ dwc2_writel(dwc2, intmsk, DOEPMSK);
+
+ dwc2_writel(dwc2, 0, DAINTMSK);
+
+ dwc2_dbg(dwc2, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+ dwc2_readl(dwc2, DIEPCTL0),
+ dwc2_readl(dwc2, DOEPCTL0));
+
+ /* Enable interrupts for EP0 in and out */
+ dwc2_hsotg_ctrl_epint(dwc2, 0, 0, 1);
+ dwc2_hsotg_ctrl_epint(dwc2, 0, 1, 1);
+ dwc2_dbg(dwc2, "DAINTMSK=0x%08x\n", dwc2_readl(dwc2, DAINTMSK));
+
+ if (!usb_reset) {
+ dctl = dwc2_readl(dwc2, DCTL);
+ dwc2_writel(dwc2, dctl | DCTL_PWRONPRGDONE, DCTL);
+
+ udelay(10); /* see openiboot */
+
+ dctl = dwc2_readl(dwc2, DCTL);
+ dwc2_writel(dwc2, dctl & ~DCTL_PWRONPRGDONE, DCTL);
+ }
+
+ dwc2_dbg(dwc2, "DCTL=0x%08x\n", dwc2_readl(dwc2, DCTL));
+
+ /*
+ * DxEPCTL_USBActEp says RO in manual, but seems to be set by
+ * writing to the EPCTL register..
+ */
+ dwc2_writel(dwc2, dwc2_ep0_mps(dwc2->eps_out[0]->ep.maxpacket) |
+ DXEPCTL_CNAK | DXEPCTL_EPENA |
+ DXEPCTL_USBACTEP, DOEPCTL0);
+
+ /* enable, but don't activate EP0in */
+ dwc2_writel(dwc2, dwc2_ep0_mps(dwc2->eps_out[0]->ep.maxpacket) |
+ DXEPCTL_USBACTEP, DIEPCTL0);
+
+ /* clear global NAKs */
+ dctl = dwc2_readl(dwc2, DCTL);
+ dctl |= DCTL_CGOUTNAK | DCTL_CGNPINNAK;
+
+ if (!usb_reset)
+ dctl |= DCTL_SFTDISCON;
+ dwc2_writel(dwc2, dctl, DCTL);
+
+ /* must be at-least 3ms to allow bus to see disconnect */
+ mdelay(3);
+}
+
+/**
+ * dwc2_set_selfpowered - set if device is self/bus powered
+ * @gadget: The usb gadget state
+ * @is_selfpowered: Whether the device is self-powered
+ *
+ * Set if the device is self or bus powered.
+ */
+static int dwc2_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+
+ dwc2->is_selfpowered = !!is_selfpowered;
+
+ return 0;
+}
+
+/**
+ * dwc2_gadget_pullup - connect/disconnect the USB PHY
+ * @gadget: The usb gadget state
+ * @is_on: Current state of the USB PHY
+ *
+ * Connect/Disconnect the USB PHY pullup
+ */
+static int dwc2_gadget_pullup(struct usb_gadget *gadget, int is_on)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+ unsigned long flags = 0;
+
+ dwc2_dbg(dwc2, "%s: is_on: %d\n", __func__, is_on);
+
+ dwc2->enabled = is_on;
+ /* Don't modify pullup state while in host mode */
+ if (dwc2_is_host_mode(dwc2)) {
+ WARN_ON(dwc2_is_host_mode(dwc2));
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&dwc2->lock, flags);
+ if (is_on) {
+ dwc2_core_gadget_init(dwc2, false);
+ /* Enable ACG feature in device mode,if supported */
+ dwc2_core_connect(dwc2);
+ } else {
+ dwc2_core_disconnect(dwc2);
+ dwc2_gadget_disconnect(dwc2);
+ }
+
+ dwc2->gadget.speed = USB_SPEED_UNKNOWN;
+ spin_unlock_irqrestore(&dwc2->lock, flags);
+
+ return 0;
+}
+
+static int dwc2_gadget_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+ unsigned long flags;
+
+ dwc2_dbg(dwc2, "%s: is_active: %d\n", __func__, is_active);
+ spin_lock_irqsave(&dwc2->lock, flags);
+
+ if (is_active) {
+ dwc2_core_gadget_init(dwc2, false);
+ if (dwc2->enabled)
+ dwc2_core_connect(dwc2);
+ } else {
+ dwc2_core_disconnect(dwc2);
+ dwc2_gadget_disconnect(dwc2);
+ }
+
+ spin_unlock_irqrestore(&dwc2->lock, flags);
+ return 0;
+}
+
+
+/**
+ * dwc2_handle_ep_disabled - handle DXEPINT_EPDISBLD
+ * @hs_ep: The endpoint on which interrupt is asserted.
+ *
+ * This interrupt indicates that the endpoint has been disabled per the
+ * application's request.
+ *
+ * For IN endpoints flushes txfifo, in case of BULK clears DCTL_CGNPINNAK,
+ * in case of ISOC completes current request.
+ *
+ * For ISOC-OUT endpoints completes expired requests. If there is remaining
+ * request starts it.
+ */
+static void dwc2_handle_ep_disabled(struct dwc2_ep *hs_ep)
+{
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ struct dwc2_request *hs_req;
+ unsigned char idx = hs_ep->epnum;
+ int dir_in = hs_ep->dir_in;
+ u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx);
+ int dctl = dwc2_readl(dwc2, DCTL);
+
+ dwc2_dbg(dwc2, "%s: EPDisbld\n", __func__);
+
+ if (dir_in) {
+ int epctl = dwc2_readl(dwc2, epctl_reg);
+
+ dwc2_flush_tx_fifo(dwc2, hs_ep->fifo_index);
+
+ if (hs_ep->isochronous) {
+ dwc2_complete_in(dwc2, hs_ep);
+ return;
+ }
+
+ if ((epctl & DXEPCTL_STALL) && (epctl & DXEPCTL_EPTYPE_BULK)) {
+ int dctl = dwc2_readl(dwc2, DCTL);
+
+ dctl |= DCTL_CGNPINNAK;
+ dwc2_writel(dwc2, dctl, DCTL);
+ }
+ return;
+ }
+
+ if (dctl & DCTL_GOUTNAKSTS) {
+ dctl |= DCTL_CGOUTNAK;
+ dwc2_writel(dwc2, dctl, DCTL);
+ }
+
+ if (!hs_ep->isochronous)
+ return;
+
+ if (list_empty(&hs_ep->queue)) {
+ dwc2_dbg(dwc2, "%s: complete_ep 0x%p, ep->queue empty!\n",
+ __func__, hs_ep);
+ return;
+ }
+
+ do {
+ hs_req = get_ep_head(hs_ep);
+ if (hs_req)
+ dwc2_complete_request(dwc2, hs_ep, hs_req, -ENODATA);
+ dwc2_gadget_incr_frame_num(hs_ep);
+ /* Update current frame number value. */
+ dwc2->frame_number = dwc2_read_frameno(dwc2);
+ } while (dwc2_gadget_target_frame_elapsed(hs_ep));
+
+ dwc2_start_next_request(hs_ep);
+}
+
+/**
+ * dwc2_handle_out_token_ep_disabled - handle DXEPINT_OUTTKNEPDIS
+ * @ep: The endpoint on which interrupt is asserted.
+ *
+ * This is starting point for ISOC-OUT transfer, synchronization done with
+ * first out token received from host while corresponding EP is disabled.
+ *
+ * Device does not know initial frame in which out token will come. For this
+ * HW generates OUTTKNEPDIS - out token is received while EP is disabled. Upon
+ * getting this interrupt SW starts calculation for next transfer frame.
+ */
+static void dwc2_handle_out_token_ep_disabled(struct dwc2_ep *ep)
+{
+ struct dwc2 *dwc2 = ep->dwc2;
+ int dir_in = ep->dir_in;
+ u32 doepmsk;
+ u32 ctrl;
+
+ dwc2_dbg(dwc2, "%s\n", __func__);
+
+ if (dir_in || !ep->isochronous)
+ return;
+
+ if (ep->interval > 1 && ep->target_frame == TARGET_FRAME_INITIAL) {
+ ep->target_frame = dwc2->frame_number;
+
+ dwc2_gadget_incr_frame_num(ep);
+
+ ctrl = dwc2_readl(dwc2, DOEPCTL(ep->epnum));
+
+ if (ep->target_frame & 0x1)
+ ctrl |= DXEPCTL_SETODDFR;
+ else
+ ctrl |= DXEPCTL_SETEVENFR;
+
+ dwc2_writel(dwc2, ctrl, DOEPCTL(ep->epnum));
+ }
+
+ dwc2_start_next_request(ep);
+
+ doepmsk = dwc2_readl(dwc2, DOEPMSK);
+ doepmsk &= ~DOEPMSK_OUTTKNEPDISMSK;
+ dwc2_writel(dwc2, doepmsk, DOEPMSK);
+}
+
+/**
+ * dwc2_handle_nak - handle NAK interrupt
+ * @hs_ep: The endpoint on which interrupt is asserted.
+ *
+ * This is starting point for ISOC-IN transfer, synchronization done with
+ * first IN token received from host while corresponding EP is disabled.
+ *
+ * Device does not know when first one token will arrive from host. On first
+ * token arrival HW generates 2 interrupts: 'in token received while FIFO empty'
+ * and 'NAK'. NAK interrupt for ISOC-IN means that token has arrived and ZLP was
+ * sent in response to that as there was no data in FIFO. SW is basing on this
+ * interrupt to obtain frame in which token has come and then based on the
+ * interval calculates next frame for transfer.
+ */
+static void dwc2_handle_nak(struct dwc2_ep *hs_ep)
+{
+ struct dwc2 *dwc2 = hs_ep->dwc2;
+ int dir_in = hs_ep->dir_in;
+ u32 ctrl;
+
+ if (!dir_in || !hs_ep->isochronous)
+ return;
+
+ if (hs_ep->target_frame == TARGET_FRAME_INITIAL) {
+ hs_ep->target_frame = dwc2->frame_number;
+ if (hs_ep->interval > 1) {
+ ctrl = dwc2_readl(dwc2, DIEPCTL(hs_ep->epnum));
+
+ if (hs_ep->target_frame & 0x1)
+ ctrl |= DXEPCTL_SETODDFR;
+ else
+ ctrl |= DXEPCTL_SETEVENFR;
+
+ dwc2_writel(dwc2, ctrl, DIEPCTL(hs_ep->epnum));
+ }
+
+ dwc2_complete_request(dwc2, hs_ep, get_ep_head(hs_ep), 0);
+ }
+
+ dwc2_gadget_incr_frame_num(hs_ep);
+}
+
+/**
+ * dwc2_handle_epint - handle an in/out endpoint interrupt
+ * @dwc2: The driver state
+ * @idx: The index for the endpoint (0..15)
+ * @dir_in: Set if this is an IN endpoint
+ *
+ * Process and clear any interrupt pending for an individual endpoint
+ */
+static void dwc2_handle_epint(struct dwc2 *dwc2, unsigned int idx,
+ int dir_in)
+{
+ struct dwc2_ep *hs_ep = index_to_ep(dwc2, idx, dir_in);
+ u32 epmsk_reg = dir_in ? DIEPMSK : DOEPMSK;
+ u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx);
+ u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx);
+ u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx);
+ u32 ints;
+ u32 mask;
+ u32 ctrl;
+
+ mask = dwc2_readl(dwc2, epmsk_reg);
+ if ((dwc2_readl(dwc2, DIEPEMPMSK) >> idx) & 1)
+ mask |= DIEPMSK_TXFIFOEMPTY;
+ mask |= DXEPINT_SETUP_RCVD;
+
+ ints = dwc2_readl(dwc2, epint_reg);
+
+ if (ints & DXEPINT_AHBERR)
+ dwc2_err(dwc2, "%s: AHBErr\n", __func__);
+
+ ints &= mask;
+
+ ctrl = dwc2_readl(dwc2, epctl_reg);
+
+ /* Clear endpoint interrupts */
+ dwc2_writel(dwc2, ints, epint_reg);
+
+ if (!hs_ep) {
+ dwc2_err(dwc2, "%s:Interrupt for unconfigured ep%d(%s)\n",
+ __func__, idx, dir_in ? "in" : "out");
+ return;
+ }
+
+ dwc2_dbg(dwc2, "%s: ep%d(%s) DxEPINT=0x%08x\n",
+ __func__, idx, dir_in ? "in" : "out", ints);
+
+ /* Don't process XferCompl interrupt if it is a setup packet */
+ if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD)))
+ ints &= ~DXEPINT_XFERCOMPL;
+
+ if (ints & DXEPINT_XFERCOMPL) {
+ dwc2_dbg(dwc2,
+ "%s: XferCompl: DxEPCTL=0x%08x, DXEPTSIZ=%08x\n",
+ __func__, dwc2_readl(dwc2, epctl_reg),
+ dwc2_readl(dwc2, epsiz_reg));
+ if (dir_in) {
+ /*
+ * We get OutDone from the FIFO, so we only
+ * need to look at completing IN requests here
+ * if operating slave mode
+ */
+ if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
+
+ dwc2_complete_in(dwc2, hs_ep);
+ if (ints & DXEPINT_NAKINTRPT)
+ ints &= ~DXEPINT_NAKINTRPT;
+
+ if (idx == 0 && !hs_ep->req)
+ dwc2_enqueue_setup(dwc2);
+ } else if (using_dma(dwc2)) {
+ /*
+ * We're using DMA, we need to fire an OutDone here
+ * as we ignore the RXFIFO.
+ */
+ if (hs_ep->isochronous && hs_ep->interval > 1)
+ dwc2_gadget_incr_frame_num(hs_ep);
+
+ dwc2_handle_outdone(dwc2, idx);
+ }
+ }
+
+ if (ints & DXEPINT_EPDISBLD)
+ dwc2_handle_ep_disabled(hs_ep);
+
+ if (ints & DXEPINT_OUTTKNEPDIS)
+ dwc2_handle_out_token_ep_disabled(hs_ep);
+
+ if (ints & DXEPINT_NAKINTRPT)
+ dwc2_handle_nak(hs_ep);
+
+ if (ints & DXEPINT_SETUP) { /* Setup or Timeout */
+ dwc2_dbg(dwc2, "%s: Setup/Timeout\n", __func__);
+
+ if (using_dma(dwc2) && idx == 0) {
+ /*
+ * this is the notification we've received a
+ * setup packet. In non-DMA mode we'd get this
+ * from the RXFIFO, instead we need to process
+ * the setup here.
+ */
+
+ if (!dir_in && dwc2->ep0_state == DWC2_EP0_SETUP)
+ dwc2_handle_outdone(dwc2, 0);
+ }
+ }
+
+ if (ints & DXEPINT_STSPHSERCVD)
+ dwc2_dbg(dwc2, "%s: StsPhseRcvd\n", __func__);
+
+ if (ints & DXEPINT_BACK2BACKSETUP)
+ dwc2_dbg(dwc2, "%s: B2BSetup/INEPNakEff\n", __func__);
+
+ if (ints & DXEPINT_BNAINTR) {
+ dwc2_dbg(dwc2, "%s: BNA interrupt\n", __func__);
+#if 0
+ if (hs_ep->isochronous)
+ dwc2_handle_isoc_bna(hs_ep);
+#endif
+ }
+
+ if (dir_in && !hs_ep->isochronous) {
+ /* not sure if this is important, but we'll clear it anyway */
+ if (ints & DXEPINT_INTKNTXFEMP) {
+ dwc2_dbg(dwc2, "%s: ep%d: INTknTXFEmpMsk\n",
+ __func__, idx);
+ }
+
+ /* this probably means something bad is happening */
+ if (ints & DXEPINT_INTKNEPMIS) {
+ dwc2_warn(dwc2, "%s: ep%d: INTknEP\n",
+ __func__, idx);
+ }
+
+ /* FIFO has space or is empty (see GAHBCFG) */
+ if (dwc2->dedicated_fifos && ints & DXEPINT_TXFEMP) {
+ dwc2_dbg(dwc2, "%s: ep%d: TxFIFOEmpty\n",
+ __func__, idx);
+ }
+ }
+}
+
+/**
+ * dwc2_handle_enumdone - Handle EnumDone interrupt (enumeration done)
+ * @dwc2: The device state.
+ *
+ * Handle updating the device settings after the enumeration phase has
+ * been completed.
+ */
+static void dwc2_handle_enumdone(struct dwc2 *dwc2)
+{
+ u32 dsts = dwc2_readl(dwc2, DSTS);
+ int ep0_mps = 0, ep_mps = 8;
+ int i;
+
+ /*
+ * This should signal the finish of the enumeration phase
+ * of the USB handshaking, so we should now know what rate
+ * we connected at.
+ */
+ dwc2_dbg(dwc2, "EnumDone (DSTS=0x%08x)\n", dsts);
+
+ /*
+ * note, since we're limited by the size of transfer on EP0, and
+ * it seems IN transfers must be a even number of packets we do
+ * not advertise a 64byte MPS on EP0.
+ */
+
+ /* catch both EnumSpd_FS and EnumSpd_FS48 */
+ switch ((dsts & DSTS_ENUMSPD_MASK) >> DSTS_ENUMSPD_SHIFT) {
+ case DSTS_ENUMSPD_FS:
+ case DSTS_ENUMSPD_FS48:
+ dwc2->gadget.speed = USB_SPEED_FULL;
+ ep0_mps = 64;
+ ep_mps = 1023;
+ break;
+ case DSTS_ENUMSPD_HS:
+ dwc2->gadget.speed = USB_SPEED_HIGH;
+ ep0_mps = 64;
+ ep_mps = 1024;
+ break;
+ case DSTS_ENUMSPD_LS:
+ dwc2->gadget.speed = USB_SPEED_LOW;
+ ep0_mps = 8;
+ ep_mps = 8;
+ /*
+ * note, we don't actually support LS in this driver at the
+ * moment, and the documentation seems to imply that it isn't
+ * supported by the PHYs on some of the devices.
+ */
+ break;
+ }
+ dwc2_dbg(dwc2, "new %s device\n", usb_speed_string(dwc2->gadget.speed));
+
+ /*
+ * we should now know the maximum packet size for an
+ * endpoint, so set the endpoints to a default value.
+ */
+ if (ep0_mps) {
+ /* Initialize ep0 for both in and out directions */
+ dwc2_set_ep_maxpacket(dwc2, 0, ep0_mps, 0, 1);
+ dwc2_set_ep_maxpacket(dwc2, 0, ep0_mps, 0, 0);
+ for (i = 1; i < dwc2->num_eps; i++) {
+ if (dwc2->eps_in[i])
+ dwc2_set_ep_maxpacket(dwc2, i, ep_mps, 0, 1);
+ if (dwc2->eps_out[i])
+ dwc2_set_ep_maxpacket(dwc2, i, ep_mps, 0, 0);
+ }
+ }
+
+ /* ensure after enumeration our EP0 is active */
+ dwc2_enqueue_setup(dwc2);
+
+ dwc2_dbg(dwc2, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+ dwc2_readl(dwc2, DIEPCTL0),
+ dwc2_readl(dwc2, DOEPCTL0));
+}
+
+/* IRQ flags which will trigger a retry around the IRQ loop */
+#define IRQ_RETRY_MASK (GINTSTS_NPTXFEMP | \
+ GINTSTS_PTXFEMP | \
+ GINTSTS_RXFLVL)
+
+static void dwc2_gadget_udc_poll(struct usb_gadget *gadget)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+ int retry_count = 4;
+ u32 gintsts;
+ u32 gintmsk;
+
+ if (!dwc2_is_device_mode(dwc2))
+ return;
+
+ spin_lock(&dwc2->lock);
+
+irq_retry:
+ gintsts = readl(dwc2->regs + GINTSTS);
+ gintmsk = readl(dwc2->regs + GINTMSK);
+ gintsts &= gintmsk;
+
+ if (!gintsts)
+ return;
+
+ dwc2_dbg(dwc2, "%s: %08x (%08x) retry %d\n",
+ __func__, gintsts, gintmsk, 4 - retry_count);
+
+ if (gintsts & GINTSTS_RESETDET) {
+ dwc2_dbg(dwc2, "%s: USBRstDet\n", __func__);
+ dwc2_writel(dwc2, GINTSTS_RESETDET, GINTSTS);
+ }
+
+ if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) {
+ u32 usb_status = dwc2_readl(dwc2, GOTGCTL);
+ u32 connected = dwc2->connected;
+
+ dwc2_dbg(dwc2, "%s: USBRst\n", __func__);
+ dwc2_dbg(dwc2, "GNPTXSTS=%08x\n", dwc2_readl(dwc2, GNPTXSTS));
+
+ dwc2_writel(dwc2, GINTSTS_USBRST, GINTSTS);
+
+ /* Report disconnection if it is not already done. */
+ dwc2_gadget_disconnect(dwc2);
+
+ /* Reset device address to zero */
+ dwc2_dcfg_set_addr(dwc2, 0);
+
+ if (usb_status & GOTGCTL_BSESVLD && connected)
+ dwc2_core_gadget_init(dwc2, true);
+ }
+
+ if (gintsts & GINTSTS_ENUMDONE) {
+ dwc2_writel(dwc2, GINTSTS_ENUMDONE, GINTSTS);
+
+ dwc2_handle_enumdone(dwc2);
+ }
+
+ if (gintsts & (GINTSTS_OEPINT | GINTSTS_IEPINT)) {
+ u32 daint = dwc2_readl(dwc2, DAINT);
+ u32 daintmsk = dwc2_readl(dwc2, DAINTMSK);
+ u32 daint_out, daint_in;
+ int ep;
+
+ daint &= daintmsk;
+ daint_out = daint >> DAINT_OUTEP_SHIFT;
+ daint_in = daint & ~(daint_out << DAINT_OUTEP_SHIFT);
+
+ dwc2_dbg(dwc2, "%s: daint=%08x\n", __func__, daint);
+
+ for (ep = 0; ep < dwc2->num_eps && daint_out;
+ ep++, daint_out >>= 1) {
+ if (daint_out & 1)
+ dwc2_handle_epint(dwc2, ep, 0);
+ }
+
+ for (ep = 0; ep < dwc2->num_eps && daint_in;
+ ep++, daint_in >>= 1) {
+ if (daint_in & 1)
+ dwc2_handle_epint(dwc2, ep, 1);
+ }
+ }
+
+ /* check both FIFOs */
+ if (gintsts & GINTSTS_NPTXFEMP) {
+ dwc2_dbg(dwc2, "NPTxFEmp\n");
+
+ /*
+ * Disable the interrupt to stop it happening again
+ * unless one of these endpoint routines decides that
+ * it needs re-enabling
+ */
+#if 0
+ dwc2_hsotg_disable_gsint(dwc2, GINTSTS_NPTXFEMP);
+ dwc2_hsotg_irq_fifoempty(dwc2, false);
+#endif
+ }
+
+ if (gintsts & GINTSTS_PTXFEMP) {
+ dwc2_dbg(dwc2, "PTxFEmp\n");
+
+ /* See note in GINTSTS_NPTxFEmp */
+#if 0
+ dwc2_hsotg_disable_gsint(dwc2, GINTSTS_PTXFEMP);
+ dwc2_hsotg_irq_fifoempty(dwc2, true);
+#endif
+ }
+
+ if (gintsts & GINTSTS_RXFLVL) {
+ /*
+ * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty,
+ * we need to retry dwc2_hsotg_handle_rx if this is still
+ * set.
+ */
+ dwc2_err(dwc2, "RXFLVL\n");
+#if 0
+ dwc2_handle_rx(dwc2);
+#endif
+ }
+
+ if (gintsts & GINTSTS_ERLYSUSP) {
+ dwc2_dbg(dwc2, "GINTSTS_ErlySusp\n");
+ dwc2_writel(dwc2, GINTSTS_ERLYSUSP, GINTSTS);
+ }
+ if (gintsts & GINTSTS_USBSUSP) {
+ dwc2_dbg(dwc2, "USBSusp\n");
+ dwc2_writel(dwc2, GINTSTS_USBSUSP, GINTSTS);
+ }
+
+ /*
+ * these next two seem to crop-up occasionally causing the core
+ * to shutdown the USB transfer, so try clearing them and logging
+ * the occurrence.
+ */
+
+ if (gintsts & GINTSTS_GOUTNAKEFF) {
+ u8 idx;
+ u32 epctrl;
+ u32 gintmsk;
+ u32 daintmsk;
+ struct dwc2_ep *hs_ep;
+
+ daintmsk = dwc2_readl(dwc2, DAINTMSK);
+ daintmsk >>= DAINT_OUTEP_SHIFT;
+ /* Mask this interrupt */
+ gintmsk = dwc2_readl(dwc2, GINTMSK);
+ gintmsk &= ~GINTSTS_GOUTNAKEFF;
+ dwc2_writel(dwc2, gintmsk, GINTMSK);
+
+ dwc2_dbg(dwc2, "GOUTNakEff triggered\n");
+ for (idx = 1; idx < dwc2->num_eps; idx++) {
+ hs_ep = dwc2->eps_out[idx];
+ /* Proceed only unmasked ISOC EPs */
+ if ((BIT(idx) & ~daintmsk) || !hs_ep->isochronous)
+ continue;
+
+ epctrl = dwc2_readl(dwc2, DOEPCTL(idx));
+
+ if (epctrl & DXEPCTL_EPENA) {
+ epctrl |= DXEPCTL_SNAK;
+ epctrl |= DXEPCTL_EPDIS;
+ dwc2_writel(dwc2, epctrl, DOEPCTL(idx));
+ }
+ }
+
+ /* This interrupt bit is cleared in DXEPINT_EPDISBLD handler */
+ }
+
+ if (gintsts & GINTSTS_GINNAKEFF) {
+ dwc2_info(dwc2, "GINNakEff triggered\n");
+ dwc2_set_bit(dwc2, DCTL, DCTL_CGNPINNAK);
+ }
+#if 0
+ if (gintsts & GINTSTS_INCOMPL_SOIN)
+ dwc2_handle_incomplete_isoc_in(dwc2);
+
+ if (gintsts & GINTSTS_INCOMPL_SOOUT)
+ dwc2_handle_incomplete_isoc_out(dwc2);
+#endif
+
+ /*
+ * if we've had fifo events, we should try and go around the
+ * loop again to see if there's any point in returning yet.
+ */
+ if (gintsts & IRQ_RETRY_MASK && --retry_count > 0)
+ goto irq_retry;
+
+ spin_unlock(&dwc2->lock);
+}
+
+/**
+ * dwc2_dwc2_udc_start - prepare the udc for work
+ * @gadget: The usb gadget state
+ * @driver: The usb gadget driver
+ *
+ * Perform initialization to prepare udc device and driver
+ * to work.
+ */
+static int dwc2_gadget_udc_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+
+ if (!driver) {
+ dwc2_err(dwc2, "%s: no driver\n", __func__);
+ return -EINVAL;
+ }
+
+ if (driver->max_speed < USB_SPEED_FULL) {
+ dwc2_err(dwc2, "%s: bad speed\n", __func__);
+ return -EINVAL;
+ }
+
+ dwc2->driver = driver;
+ dwc2->gadget.speed = USB_SPEED_UNKNOWN;
+
+ dwc2_core_gadget_init(dwc2, false);
+ dwc2_gadget_interrupt_init(dwc2);
+
+ dwc2_info(dwc2, "bound driver %s\n", driver->driver.name);
+
+ return 0;
+}
+
+static int dwc2_gadget_udc_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ struct dwc2 *dwc2 = to_dwc2(gadget);
+ unsigned long flags = 0;
+
+ dwc2_dbg(dwc2, "%s\n", __func__);
+
+ /* all endpoints should be shutdown */
+ spin_lock_irqsave(&dwc2->lock, flags);
+
+ dwc2->driver = NULL;
+ dwc2->gadget.speed = USB_SPEED_UNKNOWN;
+ dwc2->enabled = 0;
+
+ spin_unlock_irqrestore(&dwc2->lock, flags);
+
+ return 0;
+}
+
+static const struct usb_gadget_ops dwc2_gadget_ops = {
+ .get_frame = dwc2_gadget_get_frame,
+ .set_selfpowered = dwc2_set_selfpowered,
+ .vbus_session = dwc2_gadget_vbus_session,
+ .vbus_draw = NULL,
+ .pullup = dwc2_gadget_pullup,
+ .udc_start = dwc2_gadget_udc_start,
+ .udc_stop = dwc2_gadget_udc_stop,
+ .udc_poll = dwc2_gadget_udc_poll,
+};
+
+/**
+ * dwc2_gadget_ep_init - initialise a single endpoint
+ * @dwc2: The device state.
+ * @epnum: The endpoint number
+ * @dir_in: True if direction is in.
+ *
+ * Initialise the given endpoint (as part of the probe and device state
+ * creation) to give to the gadget driver. Setup the endpoint name, any
+ * direction information and other state that may be required.
+ */
+static void dwc2_ep_init(struct dwc2 *dwc2, int epnum, bool dir_in)
+{
+ struct dwc2_ep *ep;
+ char *dir;
+
+ if (dir_in)
+ ep = dwc2->eps_in[epnum];
+ else
+ ep = dwc2->eps_out[epnum];
+
+ if (epnum == 0)
+ dir = "";
+ else if (dir_in)
+ dir = "in";
+ else
+ dir = "out";
+
+ ep->dir_in = dir_in;
+ ep->epnum = epnum;
+
+ snprintf(ep->name, sizeof(ep->name), "ep%d%s", epnum, dir);
+
+ INIT_LIST_HEAD(&ep->queue);
+ INIT_LIST_HEAD(&ep->ep.ep_list);
+
+ if (epnum)
+ list_add_tail(&ep->ep.ep_list, &dwc2->gadget.ep_list);
+
+ ep->dwc2 = dwc2;
+ ep->ep.name = ep->name;
+
+ if (dwc2->params.speed == DWC2_SPEED_PARAM_LOW)
+ usb_ep_set_maxpacket_limit(&ep->ep, 8);
+ else if (epnum == 0)
+ usb_ep_set_maxpacket_limit(&ep->ep, D0EPCTL_MPS_LIMIT);
+ else
+ usb_ep_set_maxpacket_limit(&ep->ep, 1024);
+
+ ep->ep.ops = &dwc2_ep_ops;
+}
+
+static int dwc2_eps_alloc(struct dwc2 *dwc2)
+{
+ struct dwc2_ep *ep;
+ u32 cfg;
+ u32 ep_type;
+ u32 i;
+
+ /* Number of Device Endpoints */
+ dwc2->num_eps = 1 + dwc2->hw_params.num_dev_ep;
+
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ /* Same endpoint is used in both directions for ep0 */
+ dwc2->eps_out[0] = dwc2->eps_in[0] = ep;
+
+ cfg = dwc2->hw_params.dev_ep_dirs;
+ for (i = 1, cfg >>= 2; i < dwc2->num_eps; i++, cfg >>= 2) {
+ ep_type = cfg & 3;
+ /* Direction in or both */
+ if (!(ep_type & 2)) {
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+ dwc2->eps_in[i] = ep;
+ }
+ /* Direction out or both */
+ if (!(ep_type & 1)) {
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+ dwc2->eps_out[i] = ep;
+ }
+ }
+
+ dwc2->dedicated_fifos = dwc2->hw_params.en_multiple_tx_fifo;
+
+ dwc2_info(dwc2, "EPs: %d, %s fifos, 0x%x entries in SPRAM\n",
+ dwc2->num_eps,
+ dwc2->dedicated_fifos ? "dedicated" : "shared",
+ dwc2->hw_params.total_fifo_size);
+ return 0;
+}
+
+int dwc2_gadget_init(struct dwc2 *dwc2)
+{
+ u32 dctl;
+ int epnum;
+ int ret;
+
+ if (!dwc2->params.dma) {
+ dwc2_err(dwc2, "no DMA support, required by gadget driver");
+ return -ENOTSUPP;
+ }
+
+ dwc2_core_init(dwc2);
+
+ dwc2->gadget.speed = USB_SPEED_UNKNOWN;
+ if (dwc2->params.speed == DWC2_SPEED_PARAM_HIGH)
+ dwc2->gadget.max_speed = USB_SPEED_HIGH;
+ else
+ dwc2->gadget.max_speed = USB_SPEED_FULL;
+
+ dwc2->gadget.ops = &dwc2_gadget_ops;
+ dwc2->gadget.name = "DWC2 gadget";
+
+ dwc2->gadget.is_otg = (dwc2->dr_mode == USB_DR_MODE_OTG) ? 1 : 0;
+
+ ret = dwc2_eps_alloc(dwc2);
+ if (ret) {
+ dwc2_err(dwc2, "Endpoints allocation failed: %d\n", ret);
+ return ret;
+ }
+
+ dwc2->ctrl_buff = dma_alloc(DWC2_CTRL_BUFF_SIZE);
+ if (!dwc2->ctrl_buff)
+ return -ENOMEM;
+
+ dwc2->ep0_buff = dma_alloc(DWC2_CTRL_BUFF_SIZE);
+ if (!dwc2->ep0_buff)
+ return -ENOMEM;
+
+ if (dwc2->num_eps == 0) {
+ dwc2_err(dwc2, "wrong number of EPs (zero)\n");
+ return -EINVAL;
+ }
+
+ /* setup endpoint information */
+ INIT_LIST_HEAD(&dwc2->gadget.ep_list);
+ dwc2->gadget.ep0 = &dwc2->eps_out[0]->ep;
+
+ /* allocate EP0 request */
+ dwc2->ctrl_req = dwc2_ep_alloc_req(&dwc2->eps_out[0]->ep);
+ if (!dwc2->ctrl_req) {
+ dwc2_err(dwc2, "failed to allocate ctrl req\n");
+ return -ENOMEM;
+ }
+
+ /* initialise the endpoints now the core has been initialised */
+ for (epnum = 0; epnum < dwc2->num_eps; epnum++) {
+ if (dwc2->eps_in[epnum])
+ dwc2_ep_init(dwc2, epnum, 1);
+ if (dwc2->eps_out[epnum])
+ dwc2_ep_init(dwc2, epnum, 0);
+ }
+
+ /* Be in disconnected state until gadget is registered */
+ dctl = dwc2_readl(dwc2, DCTL);
+ dwc2_writel(dwc2, dctl | DCTL_SFTDISCON, DCTL);
+
+ ret = usb_add_gadget_udc(dwc2->dev, &dwc2->gadget);
+ if (ret) {
+ dwc2_ep_free_req(&dwc2->eps_out[0]->ep, dwc2->ctrl_req);
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/usb/dwc2/regs.h b/drivers/usb/dwc2/regs.h
index e842c2c2e..06fc8da82 100644
--- a/drivers/usb/dwc2/regs.h
+++ b/drivers/usb/dwc2/regs.h
@@ -502,6 +502,7 @@
#define D0EPCTL_MPS_32 1
#define D0EPCTL_MPS_16 2
#define D0EPCTL_MPS_8 3
+#define D0EPCTL_MPS_LIMIT 64
#define DXEPCTL_EPENA BIT(31)
#define DXEPCTL_EPDIS BIT(30)
--
2.17.1
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