Creation of Cybook 2416 (actually Gen4) repository

drivers/usb/class/Kconfig

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+#
+# USB Class driver configuration
+#
+comment "USB Device Class drivers"
+	depends on USB
+
+config USB_ACM
+	tristate "USB Modem (CDC ACM) support"
+	depends on USB
+	---help---
+	  This driver supports USB modems and ISDN adapters which support the
+	  Communication Device Class Abstract Control Model interface.
+	  Please read <file:Documentation/usb/acm.txt> for details.
+
+	  If your modem only reports "Cls=ff(vend.)" in the descriptors in
+	  /proc/bus/usb/devices, then your modem will not work with this
+	  driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cdc-acm.
+
+config USB_PRINTER
+	tristate "USB Printer support"
+	depends on USB
+	help
+	  Say Y here if you want to connect a USB printer to your computer's
+	  USB port.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called usblp.
+

drivers/usb/class/Makefile

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+#
+# Makefile for USB Class drivers
+# (one step up from the misc category)
+#
+
+obj-$(CONFIG_USB_ACM)		+= cdc-acm.o
+obj-$(CONFIG_USB_PRINTER)	+= usblp.o

drivers/usb/class/cdc-acm.h

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+/*
+ *
+ * Includes for cdc-acm.c
+ *
+ * Mainly take from usbnet's cdc-ether part
+ *
+ */
+
+/*
+ * CMSPAR, some architectures can't have space and mark parity.
+ */
+
+#ifndef CMSPAR
+#define CMSPAR			0
+#endif
+
+/*
+ * Major and minor numbers.
+ */
+
+#define ACM_TTY_MAJOR		166
+#define ACM_TTY_MINORS		32
+
+/*
+ * Requests.
+ */
+
+#define USB_RT_ACM		(USB_TYPE_CLASS | USB_RECIP_INTERFACE)
+
+/*
+ * Output control lines.
+ */
+
+#define ACM_CTRL_DTR		0x01
+#define ACM_CTRL_RTS		0x02
+
+/*
+ * Input control lines and line errors.
+ */
+
+#define ACM_CTRL_DCD		0x01
+#define ACM_CTRL_DSR		0x02
+#define ACM_CTRL_BRK		0x04
+#define ACM_CTRL_RI		0x08
+
+#define ACM_CTRL_FRAMING	0x10
+#define ACM_CTRL_PARITY		0x20
+#define ACM_CTRL_OVERRUN	0x40
+
+/*
+ * Internal driver structures.
+ */
+
+/*
+ * The only reason to have several buffers is to accomodate assumptions
+ * in line disciplines. They ask for empty space amount, receive our URB size,
+ * and proceed to issue several 1-character writes, assuming they will fit.
+ * The very first write takes a complete URB. Fortunately, this only happens
+ * when processing onlcr, so we only need 2 buffers. These values must be
+ * powers of 2.
+ */
+#define ACM_NW  2
+#define ACM_NR  16
+
+struct acm_wb {
+	unsigned char *buf;
+	dma_addr_t dmah;
+	int len;
+	int use;
+};
+
+struct acm_rb {
+	struct list_head	list;
+	int			size;
+	unsigned char		*base;
+	dma_addr_t		dma;
+};
+
+struct acm_ru {
+	struct list_head	list;
+	struct acm_rb		*buffer;
+	struct urb		*urb;
+	struct acm		*instance;
+};
+
+struct acm {
+	struct usb_device *dev;				/* the corresponding usb device */
+	struct usb_interface *control;			/* control interface */
+	struct usb_interface *data;			/* data interface */
+	struct tty_struct *tty;				/* the corresponding tty */
+	struct urb *ctrlurb, *writeurb;			/* urbs */
+	u8 *ctrl_buffer;				/* buffers of urbs */
+	dma_addr_t ctrl_dma;				/* dma handles of buffers */
+	struct acm_wb wb[ACM_NW];
+	struct acm_ru ru[ACM_NR];
+	struct acm_rb rb[ACM_NR];
+	int rx_buflimit;
+	int rx_endpoint;
+	spinlock_t read_lock;
+	struct list_head spare_read_urbs;
+	struct list_head spare_read_bufs;
+	struct list_head filled_read_bufs;
+	int write_current;				/* current write buffer */
+	int write_used;					/* number of non-empty write buffers */
+	int write_ready;				/* write urb is not running */
+	spinlock_t write_lock;
+	struct usb_cdc_line_coding line;		/* bits, stop, parity */
+	struct work_struct work;			/* work queue entry for line discipline waking up */
+	struct tasklet_struct urb_task;                 /* rx processing */
+	spinlock_t throttle_lock;			/* synchronize throtteling and read callback */
+	unsigned int ctrlin;				/* input control lines (DCD, DSR, RI, break, overruns) */
+	unsigned int ctrlout;				/* output control lines (DTR, RTS) */
+	unsigned int writesize;				/* max packet size for the output bulk endpoint */
+	unsigned int readsize,ctrlsize;			/* buffer sizes for freeing */
+	unsigned int used;				/* someone has this acm's device open */
+	unsigned int minor;				/* acm minor number */
+	unsigned char throttle;				/* throttled by tty layer */
+	unsigned char clocal;				/* termios CLOCAL */
+	unsigned int ctrl_caps;				/* control capabilities from the class specific header */
+};
+
+#define CDC_DATA_INTERFACE_TYPE	0x0a
+
+/* constants describing various quirks and errors */
+#define NO_UNION_NORMAL			1
+#define SINGLE_RX_URB			2