[U-Boot] [UBOOT RFC PATCH 01/13] include: linux: preparation for porting dwc3 from linux kernel

Kishon Vijay Abraham I
2014-08-18T14:28:23Z

Fixes a bunch of header files in linux/usb in order to seamlessly
port dwc3 usb driver from linux kernel to uboot.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
include/linux/compat.h | 12 +++++--
include/linux/usb/composite.h | 12 +++++++
include/linux/usb/gadget.h | 75 ++++++++++++++++++++++++++++++++++++++---
include/linux/usb/otg.h | 20 +++++++++++
include/usb/lin_gadget_compat.h | 8 ++++-
5 files changed, 119 insertions(+), 8 deletions(-)
create mode 100644 include/linux/usb/otg.h

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 3fdfb39..d54ff18 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -1,6 +1,8 @@
#ifndef _LINUX_COMPAT_H_
#define _LINUX_COMPAT_H_

+#include <common.h>
+
#define ndelay(x) udelay(1)

#define dev_dbg(dev, fmt, args...) \
@@ -53,8 +55,14 @@
#define BUG_ON(condition) do { if (condition) BUG(); } while(0)
#endif /* BUG */

-#define WARN_ON(x) if (x) {printf("WARNING in %s line %d\n" \
- , __FILE__, __LINE__); }
+#define WARN_ON(x) _WARN_ON((int)(x), __FILE__, __LINE__)
+static inline int _WARN_ON(int x, char *file, int line)
+{
+ if (x) {
+ printf("WARNING in %s line %d\n", file, line);
+ }
+ return x;
+}

#define PAGE_SIZE 4096
#endif
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index f833d10..9063aee 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -27,6 +27,18 @@
#include <linux/usb/gadget.h>
#include <usb/lin_gadget_compat.h>

+/*
+ * USB function drivers should return USB_GADGET_DELAYED_STATUS if they
+ * wish to delay the data/status stages of the control transfer till they
+ * are ready. The control transfer will then be kept from completing till
+ * all the function drivers that requested for USB_GADGET_DELAYED_STAUS
+ * invoke usb_composite_setup_continue().
+ *
+ * TODO: Fully port "usb: gadget: composite: Allow function drivers to
+ * pause control transfers" to uboot
+ */
+#define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */
+
struct usb_configuration;

/**
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index a8a5763..3d533f0 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -30,6 +30,10 @@ struct usb_ep;
* @dma: DMA address corresponding to 'buf'. If you don't set this
* field, and the usb controller needs one, it is responsible
* for mapping and unmapping the buffer.
+ * @sg: a scatterlist for SG-capable controllers.
+ * @num_sgs: number of SG entries
+ * @num_mapped_sgs: number of SG entries mapped to DMA (internal)
+ * @stream_id: The stream id, when USB3.0 bulk streams are being used
* @length: Length of that data
* @no_interrupt: If true, hints that no completion irq is needed.
* Helpful sometimes with deep request queues that are handled
@@ -84,6 +88,11 @@ struct usb_request {
unsigned length;
dma_addr_t dma;

+ struct scatterlist *sg;
+ unsigned num_sgs;
+ unsigned num_mapped_sgs;
+
+ unsigned stream_id:16;
unsigned no_interrupt:1;
unsigned zero:1;
unsigned short_not_ok:1;
@@ -120,6 +129,7 @@ struct usb_ep_ops {
int (*dequeue) (struct usb_ep *ep, struct usb_request *req);

int (*set_halt) (struct usb_ep *ep, int value);
+ int (*set_wedge) (struct usb_ep *ep);
int (*fifo_status) (struct usb_ep *ep);
void (*fifo_flush) (struct usb_ep *ep);
};
@@ -132,8 +142,18 @@ struct usb_ep_ops {
* @maxpacket:The maximum packet size used on this endpoint. The initial
* value can sometimes be reduced (hardware allowing), according to
* the endpoint descriptor used to configure the endpoint.
+ * @maxpacket_limit:The maximum packet size value which can be handled by this
+ * endpoint. It's set once by UDC driver when endpoint is initialized, and
+ * should not be changed. Should not be confused with maxpacket.
+ * @max_streams: The maximum number of streams supported
+ * by this EP (0 - 16, actual number is 2^n)
+ * @maxburst: the maximum number of bursts supported by this EP (for usb3)
* @driver_data:for use by the gadget driver. all other fields are
* read-only to gadget drivers.
+ * @desc: endpoint descriptor. This pointer is set before the endpoint is
+ * enabled and remains valid until the endpoint is disabled.
+ * @comp_desc: In case of SuperSpeed support, this is the endpoint companion
+ * descriptor that is used to configure the endpoint
*
* the bus controller driver lists all the general purpose endpoints in
* gadget->ep_list. the control endpoint (gadget->ep0) is not in that list,
@@ -145,11 +165,31 @@ struct usb_ep {
const struct usb_ep_ops *ops;
struct list_head ep_list;
unsigned maxpacket:16;
+ unsigned maxpacket_limit:16;
+ unsigned max_streams:16;
+ unsigned maxburst:5;
+ const struct usb_endpoint_descriptor *desc;
+ const struct usb_ss_ep_comp_descriptor *comp_desc;
};

/*-------------------------------------------------------------------------*/

/**
+ * usb_ep_set_maxpacket_limit - set maximum packet size limit for endpoint
+ * @ep:the endpoint being configured
+ * @maxpacket_limit:value of maximum packet size limit
+ *
+ * This function shoud be used only in UDC drivers to initialize endpoint
+ * (usually in probe function).
+ */
+static inline void usb_ep_set_maxpacket_limit(struct usb_ep *ep,
+ unsigned maxpacket_limit)
+{
+ ep->maxpacket_limit = maxpacket_limit;
+ ep->maxpacket = maxpacket_limit;
+}
+
+/**
* usb_ep_enable - configure endpoint, making it usable
* @ep:the endpoint being configured. may not be the endpoint named "ep0".
* drivers discover endpoints through the ep_list of a usb_gadget.
@@ -395,7 +435,7 @@ static inline void usb_ep_fifo_flush(struct usb_ep *ep)
/*-------------------------------------------------------------------------*/

struct usb_gadget;
-
+struct usb_gadget_driver;
/* the rest of the api to the controller hardware: device operations,
* which don't involve endpoints (or i/o).
*/
@@ -408,9 +448,13 @@ struct usb_gadget_ops {
int (*pullup) (struct usb_gadget *, int is_on);
int (*ioctl)(struct usb_gadget *,
unsigned code, unsigned long param);
+ int (*udc_start)(struct usb_gadget *,
+ struct usb_gadget_driver *);
+ int (*udc_stop)(struct usb_gadget *,
+ struct usb_gadget_driver *);
};

-struct device {
+struct usb_gadget_device {
void *driver_data; /* data private to the driver */
void *device_data; /* data private to the device */
};
@@ -422,6 +466,10 @@ struct device {
* driver setup() requests
* @ep_list: List of other endpoints supported by the device.
* @speed: Speed of current connection to USB host.
+ * @max_speed: Maximal speed the UDC can handle. UDC must support this
+ * and all slower speeds.
+ * @state: the state we are now (attached, suspended, configured, etc)
+ * @sg_supported: true if we can handle scatter-gather
* @is_dualspeed: true if the controller supports both high and full speed
* operation. If it does, the gadget driver must also support both.
* @is_otg: true if the USB device port uses a Mini-AB jack, so that the
@@ -438,6 +486,8 @@ struct device {
* @name: Identifies the controller hardware type. Used in diagnostics
* and sometimes configuration.
* @dev: Driver model state for this abstract device.
+ * @quirk_ep_out_aligned_size: epout requires buffer size to be aligned to
+ * MaxPacketSize.
*
* Gadgets have a mostly-portable "gadget driver" implementing device
* functions, handling all usb configurations and interfaces. Gadget
@@ -463,6 +513,9 @@ struct usb_gadget {
struct usb_ep *ep0;
struct list_head ep_list; /* of usb_ep */
enum usb_device_speed speed;
+ enum usb_device_speed max_speed;
+ unsigned sg_supported:1;
+ enum usb_device_state state;
unsigned is_dualspeed:1;
unsigned is_otg:1;
unsigned is_a_peripheral:1;
@@ -470,7 +523,8 @@ struct usb_gadget {
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
const char *name;
- struct device dev;
+ struct usb_gadget_device dev;
+ unsigned quirk_ep_out_aligned_size:1;
};

static inline void set_gadget_data(struct usb_gadget *gadget, void *data)
@@ -483,7 +537,8 @@ static inline void *get_gadget_data(struct usb_gadget *gadget)
return gadget->dev.driver_data;
}

-static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
+static inline
+struct usb_gadget *dev_to_usb_gadget(struct usb_gadget_device *dev)
{
return container_of(dev, struct usb_gadget, dev);
}
@@ -689,7 +744,8 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
/*-------------------------------------------------------------------------*/

/**
- * struct usb_gadget_driver - driver for usb 'slave' devices
+ * struct usb_gadget_driver - driver for uisb 'slave' devices
+ * @function: String describing the gadget's function
* @speed: Highest speed the driver handles.
* @bind: Invoked when the driver is bound to a gadget, usually
* after registering the driver.
@@ -757,6 +813,7 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
* power is maintained.
*/
struct usb_gadget_driver {
+ char *function;
enum usb_device_speed speed;
int (*bind)(struct usb_gadget *);
void (*unbind)(struct usb_gadget *);
@@ -861,4 +918,12 @@ extern void usb_ep_autoconfig_reset(struct usb_gadget *);

extern int usb_gadget_handle_interrupts(void);

+/* utility to set gadget state properly */
+
+extern void usb_gadget_set_state(struct usb_gadget *gadget,
+ enum usb_device_state state);
+extern int usb_add_gadget_udc_release(struct usb_gadget *gadget);
+extern int usb_add_gadget_udc(struct usb_gadget *gadget);
+extern void usb_del_gadget_udc(struct usb_gadget *gadget);
+
#endif /* __LINUX_USB_GADGET_H */
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
new file mode 100644
index 0000000..08bed6f
--- /dev/null
+++ b/include/linux/usb/otg.h
@@ -0,0 +1,20 @@
+/* include/linux/usb/otg.h
+ *
+ * Copyright (c) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * USB OTG (On The Go) defines
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __LINUX_USB_OTG_H
+#define __LINUX_USB_OTG_H
+
+enum usb_dr_mode {
+ USB_DR_MODE_UNKNOWN,
+ USB_DR_MODE_HOST,
+ USB_DR_MODE_PERIPHERAL,
+ USB_DR_MODE_OTG,
+};
+
+#endif /* __LINUX_USB_OTG_H */
diff --git a/include/usb/lin_gadget_compat.h b/include/usb/lin_gadget_compat.h
index a25e9d9..58be177 100644
--- a/include/usb/lin_gadget_compat.h
+++ b/include/usb/lin_gadget_compat.h
@@ -27,7 +27,13 @@

#define GFP_KERNEL 0

-#define IRQ_HANDLED 1
+enum irqreturn {
+ IRQ_NONE,
+ IRQ_HANDLED,
+ IRQ_WAKE_THREAD,
+};
+
+typedef enum irqreturn irqreturn_t;

#define ENOTSUPP 524 /* Operation is not supported */

--
1.9.1