usb: dwc2: Update the gadget driver to use common dwc2_hsotg structure

Adds the gadget data structure and appropriate data structure pointers
to the common dwc2_hsotg data structure. To keep the driver data
dereference code looking clean, the gadget variable declares are only available
for peripheral and dual-role mode. This is needed so that the dwc2_hsotg data
structure can be used by the hcd and gadget drivers.

Updates gadget.c to use the dwc2_hsotg data structure and gadget pointers
that have been moved into the common dwc2_hsotg structure.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

2 files changed, 153 insertions, 148 deletions

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 55c90c53f2d6..7bcdc10e4b01 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -84,7 +84,7 @@ static const char * const s3c_hsotg_supply_names[] = {
  */
 #define EP0_MPS_LIMIT   64
 
-struct s3c_hsotg;
+struct dwc2_hsotg;
 struct s3c_hsotg_req;
 
 /**
@@ -130,7 +130,7 @@ struct s3c_hsotg_req;
 struct s3c_hsotg_ep {
         struct usb_ep           ep;
         struct list_head        queue;
-        struct s3c_hsotg        *parent;
+        struct dwc2_hsotg       *parent;
         struct s3c_hsotg_req    *req;
         struct dentry           *debugfs;
 
@@ -155,67 +155,6 @@ struct s3c_hsotg_ep {
 };
 
 /**
- * struct s3c_hsotg - driver state.
- * @dev: The parent device supplied to the probe function
- * @driver: USB gadget driver
- * @phy: The otg phy transceiver structure for phy control.
- * @uphy: The otg phy transceiver structure for old USB phy control.
- * @plat: The platform specific configuration data. This can be removed once
- * all SoCs support usb transceiver.
- * @regs: The memory area mapped for accessing registers.
- * @irq: The IRQ number we are using
- * @supplies: Definition of USB power supplies
- * @phyif: PHY interface width
- * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
- * @num_of_eps: Number of available EPs (excluding EP0)
- * @debug_root: root directrory for debugfs.
- * @debug_file: main status file for debugfs.
- * @debug_fifo: FIFO status file for debugfs.
- * @ep0_reply: Request used for ep0 reply.
- * @ep0_buff: Buffer for EP0 reply data, if needed.
- * @ctrl_buff: Buffer for EP0 control requests.
- * @ctrl_req: Request for EP0 control packets.
- * @setup: NAK management for EP0 SETUP
- * @last_rst: Time of last reset
- * @eps: The endpoints being supplied to the gadget framework
- */
-struct s3c_hsotg {
-        struct device            *dev;
-        struct usb_gadget_driver *driver;
-        struct phy               *phy;
-        struct usb_phy           *uphy;
-        struct s3c_hsotg_plat    *plat;
-
-        spinlock_t              lock;
-
-        void __iomem            *regs;
-        int                     irq;
-        struct clk              *clk;
-
-        struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
-
-        u32                     phyif;
-        int                     fifo_mem;
-        unsigned int            dedicated_fifos:1;
-        unsigned char           num_of_eps;
-        u32                     fifo_map;
-
-        struct dentry           *debug_root;
-        struct dentry           *debug_file;
-        struct dentry           *debug_fifo;
-
-        struct usb_request      *ep0_reply;
-        struct usb_request      *ctrl_req;
-        u8                      ep0_buff[8];
-        u8                      ctrl_buff[8];
-
-        struct usb_gadget       gadget;
-        unsigned int            setup;
-        unsigned long           last_rst;
-        struct s3c_hsotg_ep     *eps;
-};
-
-/**
  * struct s3c_hsotg_req - data transfer request
  * @req: The USB gadget request
  * @queue: The list of requests for the endpoint this is queued for.
@@ -229,6 +168,7 @@ struct s3c_hsotg_req {
         unsigned char           mapped;
 };
 
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
 #define call_gadget(_hs, _entry) \
 do { \
         if ((_hs)->gadget.speed != USB_SPEED_UNKNOWN && \
@@ -238,6 +178,9 @@ do { \
                 spin_lock(&_hs->lock); \
         } \
 } while (0)
+#else
+#define call_gadget(_hs, _entry)        do {} while (0)
+#endif
 
 struct dwc2_hsotg;
 struct dwc2_host_chan;
@@ -495,11 +438,13 @@ struct dwc2_hw_params {
  * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic
  * and periodic schedules
  *
+ * These are common for both host and peripheral modes:
+ *
  * @dev:                The struct device pointer
  * @regs:               Pointer to controller regs
- * @core_params:        Parameters that define how the core should be configured
  * @hw_params:          Parameters that were autodetected from the
  *                      hardware registers
+ * @core_params:        Parameters that define how the core should be configured
  * @op_state:           The operational State, during transitions (a_host=>
  *                      a_peripheral and b_device=>b_host) this may not match
  *                      the core, but allows the software to determine
@@ -508,6 +453,8 @@ struct dwc2_hw_params {
  *                      - USB_DR_MODE_PERIPHERAL
  *                      - USB_DR_MODE_HOST
  *                      - USB_DR_MODE_OTG
+ * @lock:               Spinlock that protects all the driver data structures
+ * @priv:               Stores a pointer to the struct usb_hcd
  * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
  *                      transfer are in process of being queued
  * @srp_success:        Stores status of SRP request in the case of a FS PHY
@@ -517,6 +464,9 @@ struct dwc2_hw_params {
  *                      interrupt
  * @wkp_timer:          Timer object for handling Wakeup Detected interrupt
  * @lx_state:           Lx state of connected device
+ *
+ * These are for host mode:
+ *
  * @flags:              Flags for handling root port state changes
  * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule.
  *                      Transfers associated with these QHs are not currently
@@ -585,11 +535,31 @@ struct dwc2_hw_params {
  * @status_buf_dma:     DMA address for status_buf
  * @start_work:         Delayed work for handling host A-cable connection
  * @reset_work:         Delayed work for handling a port reset
- * @lock:               Spinlock that protects all the driver data structures
- * @priv:               Stores a pointer to the struct usb_hcd
  * @otg_port:           OTG port number
  * @frame_list:         Frame list
  * @frame_list_dma:     Frame list DMA address
+ *
+ * These are for peripheral mode:
+ *
+ * @driver:             USB gadget driver
+ * @phy:                The otg phy transceiver structure for phy control.
+ * @uphy:               The otg phy transceiver structure for old USB phy control.
+ * @plat:               The platform specific configuration data. This can be removed once
+ *                      all SoCs support usb transceiver.
+ * @supplies:           Definition of USB power supplies
+ * @phyif:              PHY interface width
+ * @dedicated_fifos:    Set if the hardware has dedicated IN-EP fifos.
+ * @num_of_eps:         Number of available EPs (excluding EP0)
+ * @debug_root:         Root directrory for debugfs.
+ * @debug_file:         Main status file for debugfs.
+ * @debug_fifo:         FIFO status file for debugfs.
+ * @ep0_reply:          Request used for ep0 reply.
+ * @ep0_buff:           Buffer for EP0 reply data, if needed.
+ * @ctrl_buff:          Buffer for EP0 control requests.
+ * @ctrl_req:           Request for EP0 control packets.
+ * @setup:              NAK management for EP0 SETUP
+ * @last_rst:           Time of last reset
+ * @eps:                The endpoints being supplied to the gadget framework
  */
 struct dwc2_hsotg {
         struct device *dev;
@@ -601,6 +571,15 @@ struct dwc2_hsotg {
         enum usb_otg_state op_state;
         enum usb_dr_mode dr_mode;
 
+        struct phy *phy;
+        struct usb_phy *uphy;
+        struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
+
+        spinlock_t lock;
+        void *priv;
+        int     irq;
+        struct clk *clk;
+
         unsigned int queuing_high_bandwidth:1;
         unsigned int srp_success:1;
 
@@ -609,6 +588,18 @@ struct dwc2_hsotg {
         struct timer_list wkp_timer;
         enum dwc2_lx_state lx_state;
 
+        struct dentry *debug_root;
+        struct dentry *debug_file;
+        struct dentry *debug_fifo;
+
+        /* DWC OTG HW Release versions */
+#define DWC2_CORE_REV_2_71a     0x4f54271a
+#define DWC2_CORE_REV_2_90a     0x4f54290a
+#define DWC2_CORE_REV_2_92a     0x4f54292a
+#define DWC2_CORE_REV_2_94a     0x4f54294a
+#define DWC2_CORE_REV_3_00a     0x4f54300a
+
+#if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
         union dwc2_hcd_internal_flags {
                 u32 d32;
                 struct {
@@ -655,19 +646,10 @@ struct dwc2_hsotg {
 
         struct delayed_work start_work;
         struct delayed_work reset_work;
-        spinlock_t lock;
-        void *priv;
         u8 otg_port;
         u32 *frame_list;
         dma_addr_t frame_list_dma;
 
-        /* DWC OTG HW Release versions */
-#define DWC2_CORE_REV_2_71a     0x4f54271a
-#define DWC2_CORE_REV_2_90a     0x4f54290a
-#define DWC2_CORE_REV_2_92a     0x4f54292a
-#define DWC2_CORE_REV_2_94a     0x4f54294a
-#define DWC2_CORE_REV_3_00a     0x4f54300a
-
 #ifdef DEBUG
         u32 frrem_samples;
         u64 frrem_accum;
@@ -686,6 +668,29 @@ struct dwc2_hsotg {
         u32 hfnum_other_samples_b;
         u64 hfnum_other_frrem_accum_b;
 #endif
+#endif /* CONFIG_USB_DWC2_HOST || CONFIG_USB_DWC2_DUAL_ROLE */
+
+#if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
+        /* Gadget structures */
+        struct usb_gadget_driver *driver;
+        struct s3c_hsotg_plat *plat;
+
+        u32 phyif;
+        int fifo_mem;
+        unsigned int dedicated_fifos:1;
+        unsigned char num_of_eps;
+        u32 fifo_map;
+
+        struct usb_request *ep0_reply;
+        struct usb_request *ctrl_req;
+        u8 ep0_buff[8];
+        u8 ctrl_buff[8];
+
+        struct usb_gadget gadget;
+        unsigned int setup;
+        unsigned long last_rst;
+        struct s3c_hsotg_ep *eps;
+#endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */
 };
 
 /* Reasons for halting a host channel */
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index fcd2bb55ccca..5a24e95ae1b0 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -36,6 +36,7 @@
 #include <linux/platform_data/s3c-hsotg.h>
 
 #include "core.h"
+#include "hw.h"
 
 /* conversion functions */
 static inline struct s3c_hsotg_req *our_req(struct usb_request *req)
@@ -48,9 +49,9 @@ static inline struct s3c_hsotg_ep *our_ep(struct usb_ep *ep)
         return container_of(ep, struct s3c_hsotg_ep, ep);
 }
 
-static inline struct s3c_hsotg *to_hsotg(struct usb_gadget *gadget)
+static inline struct dwc2_hsotg *to_hsotg(struct usb_gadget *gadget)
 {
-        return container_of(gadget, struct s3c_hsotg, gadget);
+        return container_of(gadget, struct dwc2_hsotg, gadget);
 }
 
 static inline void __orr32(void __iomem *ptr, u32 val)
@@ -64,7 +65,7 @@ static inline void __bic32(void __iomem *ptr, u32 val)
 }
 
 /* forward decleration of functions */
-static void s3c_hsotg_dump(struct s3c_hsotg *hsotg);
+static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg);
 
 /**
  * using_dma - return the DMA status of the driver.
@@ -85,7 +86,7 @@ static void s3c_hsotg_dump(struct s3c_hsotg *hsotg);
  *
  * Until this issue is sorted out, we always return 'false'.
  */
-static inline bool using_dma(struct s3c_hsotg *hsotg)
+static inline bool using_dma(struct dwc2_hsotg *hsotg)
 {
         return false;   /* support is not complete */
 }
@@ -95,7 +96,7 @@ static inline bool using_dma(struct s3c_hsotg *hsotg)
  * @hsotg: The device state
  * @ints: A bitmask of the interrupts to enable
  */
-static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints)
+static void s3c_hsotg_en_gsint(struct dwc2_hsotg *hsotg, u32 ints)
 {
         u32 gsintmsk = readl(hsotg->regs + GINTMSK);
         u32 new_gsintmsk;
@@ -113,7 +114,7 @@ static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints)
  * @hsotg: The device state
  * @ints: A bitmask of the interrupts to enable
  */
-static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints)
+static void s3c_hsotg_disable_gsint(struct dwc2_hsotg *hsotg, u32 ints)
 {
         u32 gsintmsk = readl(hsotg->regs + GINTMSK);
         u32 new_gsintmsk;
@@ -134,7 +135,7 @@ static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints)
  * Set or clear the mask for an individual endpoint's interrupt
  * request.
  */
-static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg,
                                  unsigned int ep, unsigned int dir_in,
                                  unsigned int en)
 {
@@ -159,7 +160,7 @@ static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg,
  * s3c_hsotg_init_fifo - initialise non-periodic FIFOs
  * @hsotg: The device instance.
  */
-static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_init_fifo(struct dwc2_hsotg *hsotg)
 {
         unsigned int ep;
         unsigned int addr;
@@ -283,7 +284,7 @@ static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep)
  * This is the reverse of s3c_hsotg_map_dma(), called for the completion
  * of a request to ensure the buffer is ready for access by the caller.
  */
-static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_unmap_dma(struct dwc2_hsotg *hsotg,
                                 struct s3c_hsotg_ep *hs_ep,
                                 struct s3c_hsotg_req *hs_req)
 {
@@ -312,7 +313,7 @@ static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg,
  *
  * This routine is only needed for PIO
  */
-static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
                                 struct s3c_hsotg_ep *hs_ep,
                                 struct s3c_hsotg_req *hs_req)
 {
@@ -517,7 +518,7 @@ static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep)
  * Start the given request running by setting the endpoint registers
  * appropriately, and writing any data to the FIFOs.
  */
-static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_start_req(struct dwc2_hsotg *hsotg,
                                 struct s3c_hsotg_ep *hs_ep,
                                 struct s3c_hsotg_req *hs_req,
                                 bool continuing)
@@ -707,7 +708,7 @@ static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg,
  * DMA memory, then we map the memory and mark our request to allow us to
  * cleanup on completion.
  */
-static int s3c_hsotg_map_dma(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_map_dma(struct dwc2_hsotg *hsotg,
                              struct s3c_hsotg_ep *hs_ep,
                              struct usb_request *req)
 {
@@ -736,7 +737,7 @@ static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
 {
         struct s3c_hsotg_req *hs_req = our_req(req);
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hs = hs_ep->parent;
+        struct dwc2_hsotg *hs = hs_ep->parent;
         bool first;
 
         dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n",
@@ -768,7 +769,7 @@ static int s3c_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req,
                               gfp_t gfp_flags)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hs = hs_ep->parent;
+        struct dwc2_hsotg *hs = hs_ep->parent;
         unsigned long flags = 0;
         int ret = 0;
 
@@ -799,7 +800,7 @@ static void s3c_hsotg_complete_oursetup(struct usb_ep *ep,
                                         struct usb_request *req)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hsotg = hs_ep->parent;
+        struct dwc2_hsotg *hsotg = hs_ep->parent;
 
         dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req);
 
@@ -814,7 +815,7 @@ static void s3c_hsotg_complete_oursetup(struct usb_ep *ep,
  * Convert the given wIndex into a pointer to an driver endpoint
  * structure, or return NULL if it is not a valid endpoint.
  */
-static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
+static struct s3c_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
                                            u32 windex)
 {
         struct s3c_hsotg_ep *ep = &hsotg->eps[windex & 0x7F];
@@ -843,7 +844,7 @@ static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
  * 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 s3c_hsotg_send_reply(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_send_reply(struct dwc2_hsotg *hsotg,
                                 struct s3c_hsotg_ep *ep,
                                 void *buff,
                                 int length)
@@ -884,7 +885,7 @@ static int s3c_hsotg_send_reply(struct s3c_hsotg *hsotg,
  * @hsotg: The device state
  * @ctrl: USB control request
  */
-static int s3c_hsotg_process_req_status(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_process_req_status(struct dwc2_hsotg *hsotg,
                                         struct usb_ctrlrequest *ctrl)
 {
         struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
@@ -955,7 +956,7 @@ static struct s3c_hsotg_req *get_ep_head(struct s3c_hsotg_ep *hs_ep)
  * @hsotg: The device state
  * @ctrl: USB control request
  */
-static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
                                          struct usb_ctrlrequest *ctrl)
 {
         struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
@@ -1028,8 +1029,8 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
         return 1;
 }
 
-static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg);
-static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg);
+static void s3c_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg);
+static void s3c_hsotg_disconnect(struct dwc2_hsotg *hsotg);
 
 /**
  * s3c_hsotg_stall_ep0 - stall ep0
@@ -1037,7 +1038,7 @@ static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg);
  *
  * Set stall for ep0 as response for setup request.
  */
-static void s3c_hsotg_stall_ep0(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_stall_ep0(struct dwc2_hsotg *hsotg)
 {
         struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
         u32 reg;
@@ -1076,7 +1077,7 @@ static void s3c_hsotg_stall_ep0(struct s3c_hsotg *hsotg)
  * needs to work out what to do next (and whether to pass it on to the
  * gadget driver).
  */
-static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_process_control(struct dwc2_hsotg *hsotg,
                                       struct usb_ctrlrequest *ctrl)
 {
         struct s3c_hsotg_ep *ep0 = &hsotg->eps[0];
@@ -1161,7 +1162,7 @@ static void s3c_hsotg_complete_setup(struct usb_ep *ep,
                                      struct usb_request *req)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hsotg = hs_ep->parent;
+        struct dwc2_hsotg *hsotg = hs_ep->parent;
 
         if (req->status < 0) {
                 dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status);
@@ -1183,7 +1184,7 @@ static void s3c_hsotg_complete_setup(struct usb_ep *ep,
  * Enqueue a request on EP0 if necessary to received any SETUP packets
  * received from the host.
  */
-static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg)
 {
         struct usb_request *req = hsotg->ctrl_req;
         struct s3c_hsotg_req *hs_req = our_req(req);
@@ -1226,7 +1227,7 @@ static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg)
  *
  * Note, expects the ep to already be locked as appropriate.
  */
-static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_complete_request(struct dwc2_hsotg *hsotg,
                                        struct s3c_hsotg_ep *hs_ep,
                                        struct s3c_hsotg_req *hs_req,
                                        int result)
@@ -1291,7 +1292,7 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,
  * endpoint, so sort out whether we need to read the data into a request
  * that has been made for that endpoint.
  */
-static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
+static void s3c_hsotg_rx_data(struct dwc2_hsotg *hsotg, int ep_idx, int size)
 {
         struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep_idx];
         struct s3c_hsotg_req *hs_req = hs_ep->req;
@@ -1356,7 +1357,7 @@ static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size)
  * currently believed that we do not need to wait for any space in
  * the TxFIFO.
  */
-static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_send_zlp(struct dwc2_hsotg *hsotg,
                                struct s3c_hsotg_req *req)
 {
         u32 ctrl;
@@ -1398,7 +1399,7 @@ static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg,
  * transfer for an OUT endpoint has been completed, either by a short
  * packet or by the finish of a transfer.
  */
-static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_handle_outdone(struct dwc2_hsotg *hsotg,
                                      int epnum, bool was_setup)
 {
         u32 epsize = readl(hsotg->regs + DOEPTSIZ(epnum));
@@ -1471,7 +1472,7 @@ static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
  *
  * Return the current frame number
  */
-static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg)
+static u32 s3c_hsotg_read_frameno(struct dwc2_hsotg *hsotg)
 {
         u32 dsts;
 
@@ -1498,7 +1499,7 @@ static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg)
  * as the actual data should be sent to the memory directly and we turn
  * on the completion interrupts to get notifications of transfer completion.
  */
-static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_handle_rx(struct dwc2_hsotg *hsotg)
 {
         u32 grxstsr = readl(hsotg->regs + GRXSTSP);
         u32 epnum, status, size;
@@ -1590,7 +1591,7 @@ static u32 s3c_hsotg_ep0_mps(unsigned int mps)
  * Configure the maximum packet size for the given endpoint, updating
  * the hardware control registers to reflect this.
  */
-static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_set_ep_maxpacket(struct dwc2_hsotg *hsotg,
                                        unsigned int ep, unsigned int mps)
 {
         struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep];
@@ -1645,7 +1646,7 @@ bad_mps:
  * @hsotg: The driver state
  * @idx: The index for the endpoint (0..15)
  */
-static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx)
+static void s3c_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx)
 {
         int timeout;
         int val;
@@ -1681,7 +1682,7 @@ static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx)
  * Check to see if there is a request that has data to send, and if so
  * make an attempt to write data into the FIFO.
  */
-static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg,
+static int s3c_hsotg_trytx(struct dwc2_hsotg *hsotg,
                            struct s3c_hsotg_ep *hs_ep)
 {
         struct s3c_hsotg_req *hs_req = hs_ep->req;
@@ -1714,7 +1715,7 @@ static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg,
  * An IN transfer has been completed, update the transfer's state and then
  * call the relevant completion routines.
  */
-static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_complete_in(struct dwc2_hsotg *hsotg,
                                   struct s3c_hsotg_ep *hs_ep)
 {
         struct s3c_hsotg_req *hs_req = hs_ep->req;
@@ -1791,7 +1792,7 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg,
  *
  * Process and clear any interrupt pending for an individual endpoint
  */
-static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
+static void s3c_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
                             int dir_in)
 {
         struct s3c_hsotg_ep *hs_ep = &hsotg->eps[idx];
@@ -1916,7 +1917,7 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
  * Handle updating the device settings after the enumeration phase has
  * been completed.
  */
-static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_irq_enumdone(struct dwc2_hsotg *hsotg)
 {
         u32 dsts = readl(hsotg->regs + DSTS);
         int ep0_mps = 0, ep_mps = 8;
@@ -1993,7 +1994,7 @@ static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
  * Go through the requests on the given endpoint and mark them
  * completed with the given result code.
  */
-static void kill_all_requests(struct s3c_hsotg *hsotg,
+static void kill_all_requests(struct dwc2_hsotg *hsotg,
                               struct s3c_hsotg_ep *ep,
                               int result, bool force)
 {
@@ -2027,7 +2028,7 @@ static void kill_all_requests(struct s3c_hsotg *hsotg,
  * transactions and signal the gadget driver that this
  * has happened.
  */
-static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_disconnect(struct dwc2_hsotg *hsotg)
 {
         unsigned ep;
 
@@ -2042,7 +2043,7 @@ static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg)
  * @hsotg: The device state:
  * @periodic: True if this is a periodic FIFO interrupt
  */
-static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
+static void s3c_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic)
 {
         struct s3c_hsotg_ep *ep;
         int epno, ret;
@@ -2076,7 +2077,7 @@ static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
  *
  * Issue a soft reset to the core, and await the core finishing it.
  */
-static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
+static int s3c_hsotg_corereset(struct dwc2_hsotg *hsotg)
 {
         int timeout;
         u32 grstctl;
@@ -2124,7 +2125,7 @@ static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
  *
  * Issue a soft reset to the core, and await the core finishing it.
  */
-static void s3c_hsotg_core_init_disconnected(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
 {
         s3c_hsotg_corereset(hsotg);
 
@@ -2250,13 +2251,13 @@ static void s3c_hsotg_core_init_disconnected(struct s3c_hsotg *hsotg)
         hsotg->last_rst = jiffies;
 }
 
-static void s3c_hsotg_core_disconnect(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
 {
         /* set the soft-disconnect bit */
         __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
 }
 
-static void s3c_hsotg_core_connect(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg)
 {
         /* remove the soft-disconnect and let's go */
         __bic32(hsotg->regs + DCTL, DCTL_SFTDISCON);
@@ -2269,7 +2270,7 @@ static void s3c_hsotg_core_connect(struct s3c_hsotg *hsotg)
  */
 static irqreturn_t s3c_hsotg_irq(int irq, void *pw)
 {
-        struct s3c_hsotg *hsotg = pw;
+        struct dwc2_hsotg *hsotg = pw;
         int retry_count = 8;
         u32 gintsts;
         u32 gintmsk;
@@ -2461,7 +2462,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
                                const struct usb_endpoint_descriptor *desc)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hsotg = hs_ep->parent;
+        struct dwc2_hsotg *hsotg = hs_ep->parent;
         unsigned long flags;
         int index = hs_ep->index;
         u32 epctrl_reg;
@@ -2604,7 +2605,7 @@ error:
 static int s3c_hsotg_ep_disable(struct usb_ep *ep)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hsotg = hs_ep->parent;
+        struct dwc2_hsotg *hsotg = hs_ep->parent;
         int dir_in = hs_ep->dir_in;
         int index = hs_ep->index;
         unsigned long flags;
@@ -2669,7 +2670,7 @@ static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 {
         struct s3c_hsotg_req *hs_req = our_req(req);
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hs = hs_ep->parent;
+        struct dwc2_hsotg *hs = hs_ep->parent;
         unsigned long flags;
 
         dev_dbg(hs->dev, "ep_dequeue(%p,%p)\n", ep, req);
@@ -2695,7 +2696,7 @@ static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hs = hs_ep->parent;
+        struct dwc2_hsotg *hs = hs_ep->parent;
         int index = hs_ep->index;
         u32 epreg;
         u32 epctl;
@@ -2759,7 +2760,7 @@ static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value)
 static int s3c_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value)
 {
         struct s3c_hsotg_ep *hs_ep = our_ep(ep);
-        struct s3c_hsotg *hs = hs_ep->parent;
+        struct dwc2_hsotg *hs = hs_ep->parent;
         unsigned long flags = 0;
         int ret = 0;
 
@@ -2788,7 +2789,7 @@ static struct usb_ep_ops s3c_hsotg_ep_ops = {
  * A wrapper for platform code responsible for controlling
  * low-level USB code
  */
-static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_phy_enable(struct dwc2_hsotg *hsotg)
 {
         struct platform_device *pdev = to_platform_device(hsotg->dev);
 
@@ -2811,7 +2812,7 @@ static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg)
  * A wrapper for platform code responsible for controlling
  * low-level USB code
  */
-static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_phy_disable(struct dwc2_hsotg *hsotg)
 {
         struct platform_device *pdev = to_platform_device(hsotg->dev);
 
@@ -2829,7 +2830,7 @@ static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
  * s3c_hsotg_init - initalize the usb core
  * @hsotg: The driver state
  */
-static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_init(struct dwc2_hsotg *hsotg)
 {
         /* unmask subset of endpoint interrupts */
 
@@ -2879,7 +2880,7 @@ static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
 static int s3c_hsotg_udc_start(struct usb_gadget *gadget,
                            struct usb_gadget_driver *driver)
 {
-        struct s3c_hsotg *hsotg = to_hsotg(gadget);
+        struct dwc2_hsotg *hsotg = to_hsotg(gadget);
         unsigned long flags;
         int ret;
 
@@ -2942,7 +2943,7 @@ err:
  */
 static int s3c_hsotg_udc_stop(struct usb_gadget *gadget)
 {
-        struct s3c_hsotg *hsotg = to_hsotg(gadget);
+        struct dwc2_hsotg *hsotg = to_hsotg(gadget);
         unsigned long flags = 0;
         int ep;
 
@@ -2989,7 +2990,7 @@ static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget)
  */
 static int s3c_hsotg_pullup(struct usb_gadget *gadget, int is_on)
 {
-        struct s3c_hsotg *hsotg = to_hsotg(gadget);
+        struct dwc2_hsotg *hsotg = to_hsotg(gadget);
         unsigned long flags = 0;
 
         dev_dbg(hsotg->dev, "%s: is_on: %d\n", __func__, is_on);
@@ -3026,7 +3027,7 @@ static const struct usb_gadget_ops s3c_hsotg_gadget_ops = {
  * creation) to give to the gadget driver. Setup the endpoint name, any
  * direction information and other state that may be required.
  */
-static void s3c_hsotg_initep(struct s3c_hsotg *hsotg,
+static void s3c_hsotg_initep(struct dwc2_hsotg *hsotg,
                                        struct s3c_hsotg_ep *hs_ep,
                                        int epnum)
 {
@@ -3075,7 +3076,7 @@ static void s3c_hsotg_initep(struct s3c_hsotg *hsotg,
  *
  * Read the USB core HW configuration registers
  */
-static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
 {
         u32 cfg2, cfg3, cfg4;
         /* check hardware configuration */
@@ -3099,7 +3100,7 @@ static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg)
  * s3c_hsotg_dump - dump state of the udc
  * @param: The device state
  */
-static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg)
 {
 #ifdef DEBUG
         struct device *dev = hsotg->dev;
@@ -3158,7 +3159,7 @@ static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
  */
 static int state_show(struct seq_file *seq, void *v)
 {
-        struct s3c_hsotg *hsotg = seq->private;
+        struct dwc2_hsotg *hsotg = seq->private;
         void __iomem *regs = hsotg->regs;
         int idx;
 
@@ -3228,7 +3229,7 @@ static const struct file_operations state_fops = {
  */
 static int fifo_show(struct seq_file *seq, void *v)
 {
-        struct s3c_hsotg *hsotg = seq->private;
+        struct dwc2_hsotg *hsotg = seq->private;
         void __iomem *regs = hsotg->regs;
         u32 val;
         int idx;
@@ -3284,7 +3285,7 @@ static const char *decode_direction(int is_in)
 static int ep_show(struct seq_file *seq, void *v)
 {
         struct s3c_hsotg_ep *ep = seq->private;
-        struct s3c_hsotg *hsotg = ep->parent;
+        struct dwc2_hsotg *hsotg = ep->parent;
         struct s3c_hsotg_req *req;
         void __iomem *regs = hsotg->regs;
         int index = ep->index;
@@ -3361,7 +3362,7 @@ static const struct file_operations ep_fops = {
  * with the same name as the device itself, in case we end up
  * with multiple blocks in future systems.
  */
-static void s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_create_debug(struct dwc2_hsotg *hsotg)
 {
         struct dentry *root;
         unsigned epidx;
@@ -3407,7 +3408,7 @@ static void s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
  *
  * Cleanup (remove) the debugfs files for use on module exit.
  */
-static void s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
+static void s3c_hsotg_delete_debug(struct dwc2_hsotg *hsotg)
 {
         unsigned epidx;
 
@@ -3425,7 +3426,6 @@ static void s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
  * s3c_hsotg_probe - probe function for hsotg driver
  * @pdev: The platform information for the driver
  */
-
 static int s3c_hsotg_probe(struct platform_device *pdev)
 {
         struct s3c_hsotg_plat *plat = dev_get_platdata(&pdev->dev);
@@ -3433,13 +3433,13 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
         struct usb_phy *uphy;
         struct device *dev = &pdev->dev;
         struct s3c_hsotg_ep *eps;
-        struct s3c_hsotg *hsotg;
+        struct dwc2_hsotg *hsotg;
         struct resource *res;
         int epnum;
         int ret;
         int i;
 
-        hsotg = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsotg), GFP_KERNEL);
+        hsotg = devm_kzalloc(&pdev->dev, sizeof(struct dwc2_hsotg), GFP_KERNEL);
         if (!hsotg)
                 return -ENOMEM;
 
@@ -3520,7 +3520,7 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies),
                                  hsotg->supplies);
         if (ret) {
-                dev_err(dev, "failed to request supplies: %d\n", ret);
+                dev_err(hsotg->dev, "failed to request supplies: %d\n", ret);
                 goto err_clk;
         }
 
@@ -3528,7 +3528,7 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
                                     hsotg->supplies);
 
         if (ret) {
-                dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
+                dev_err(dev, "failed to enable supplies: %d\n", ret);
                 goto err_supplies;
         }
 
@@ -3592,7 +3592,7 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
         ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
                                     hsotg->supplies);
         if (ret) {
-                dev_err(hsotg->dev, "failed to disable supplies: %d\n", ret);
+                dev_err(&pdev->dev, "failed to disable supplies: %d\n", ret);
                 goto err_ep_mem;
         }
 
@@ -3622,7 +3622,7 @@ err_clk:
  */
 static int s3c_hsotg_remove(struct platform_device *pdev)
 {
-        struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
+        struct dwc2_hsotg *hsotg = platform_get_drvdata(pdev);
 
         usb_del_gadget_udc(&hsotg->gadget);
         s3c_hsotg_delete_debug(hsotg);
@@ -3633,7 +3633,7 @@ static int s3c_hsotg_remove(struct platform_device *pdev)
 
 static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state)
 {
-        struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
+        struct dwc2_hsotg *hsotg = platform_get_drvdata(pdev);
         unsigned long flags;
         int ret = 0;
 
@@ -3664,7 +3664,7 @@ static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state)
 
 static int s3c_hsotg_resume(struct platform_device *pdev)
 {
-        struct s3c_hsotg *hsotg = platform_get_drvdata(pdev);
+        struct dwc2_hsotg *hsotg = platform_get_drvdata(pdev);
         unsigned long flags;
         int ret = 0;