diff options
Diffstat (limited to 'drivers/usb/gadget/serial.c')
| -rw-r--r-- | drivers/usb/gadget/serial.c | 2315 |
1 files changed, 146 insertions, 2169 deletions
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c index fa019fa7333..b3699afff00 100644 --- a/drivers/usb/gadget/serial.c +++ b/drivers/usb/gadget/serial.c @@ -1,15 +1,9 @@ /* - * g_serial.c -- USB gadget serial driver + * serial.c -- USB gadget serial driver * - * Copyright 2003 (C) Al Borchers (alborchers@steinerpoint.com) - * - * This code is based in part on the Gadget Zero driver, which - * is Copyright (C) 2003 by David Brownell, all rights reserved. - * - * This code also borrows from usbserial.c, which is - * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) - * Copyright (C) 2000 Peter Berger (pberger@brimson.com) - * Copyright (C) 2000 Al Borchers (alborchers@steinerpoint.com) + * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com) + * Copyright (C) 2008 by David Brownell + * Copyright (C) 2008 by Nokia Corporation * * This software is distributed under the terms of the GNU General * Public License ("GPL") as published by the Free Software Foundation, @@ -22,2254 +16,237 @@ #include <linux/tty.h> #include <linux/tty_flip.h> -#include <linux/usb/ch9.h> -#include <linux/usb/cdc.h> -#include <linux/usb/gadget.h> - +#include "u_serial.h" #include "gadget_chips.h" /* Defines */ -#define GS_VERSION_STR "v2.2" -#define GS_VERSION_NUM 0x2200 +#define GS_VERSION_STR "v2.4" +#define GS_VERSION_NUM 0x2400 #define GS_LONG_NAME "Gadget Serial" -#define GS_SHORT_NAME "g_serial" - -#define GS_MAJOR 127 -#define GS_MINOR_START 0 - -/* REVISIT only one port is supported for now; - * see gs_{send,recv}_packet() ... no multiplexing, - * and no support for multiple ACM devices. - */ -#define GS_NUM_PORTS 1 - -#define GS_NUM_CONFIGS 1 -#define GS_NO_CONFIG_ID 0 -#define GS_BULK_CONFIG_ID 1 -#define GS_ACM_CONFIG_ID 2 - -#define GS_MAX_NUM_INTERFACES 2 -#define GS_BULK_INTERFACE_ID 0 -#define GS_CONTROL_INTERFACE_ID 0 -#define GS_DATA_INTERFACE_ID 1 - -#define GS_MAX_DESC_LEN 256 - -#define GS_DEFAULT_READ_Q_SIZE 32 -#define GS_DEFAULT_WRITE_Q_SIZE 32 - -#define GS_DEFAULT_WRITE_BUF_SIZE 8192 -#define GS_TMP_BUF_SIZE 8192 - -#define GS_CLOSE_TIMEOUT 15 - -#define GS_DEFAULT_USE_ACM 0 - -/* 9600-8-N-1 ... matches init_termios.c_cflag and defaults - * expected by "usbser.sys" on MS-Windows. - */ -#define GS_DEFAULT_DTE_RATE 9600 -#define GS_DEFAULT_DATA_BITS 8 -#define GS_DEFAULT_PARITY USB_CDC_NO_PARITY -#define GS_DEFAULT_CHAR_FORMAT USB_CDC_1_STOP_BITS - -/* maxpacket and other transfer characteristics vary by speed. */ -static inline struct usb_endpoint_descriptor * -choose_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, - struct usb_endpoint_descriptor *fs) -{ - if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) - return hs; - return fs; -} - - -/* debug settings */ -#ifdef DEBUG -static int debug = 1; -#else -#define debug 0 -#endif - -#define gs_debug(format, arg...) \ - do { if (debug) pr_debug(format, ## arg); } while (0) -#define gs_debug_level(level, format, arg...) \ - do { if (debug >= level) pr_debug(format, ## arg); } while (0) +#define GS_VERSION_NAME GS_LONG_NAME " " GS_VERSION_STR +/*-------------------------------------------------------------------------*/ /* Thanks to NetChip Technologies for donating this product ID. - * - * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! - * Instead: allocate your own, using normal USB-IF procedures. - */ +* +* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! +* Instead: allocate your own, using normal USB-IF procedures. +*/ #define GS_VENDOR_ID 0x0525 /* NetChip */ #define GS_PRODUCT_ID 0xa4a6 /* Linux-USB Serial Gadget */ #define GS_CDC_PRODUCT_ID 0xa4a7 /* ... as CDC-ACM */ -#define GS_LOG2_NOTIFY_INTERVAL 5 /* 1 << 5 == 32 msec */ -#define GS_NOTIFY_MAXPACKET 8 +/* string IDs are assigned dynamically */ +#define STRING_MANUFACTURER_IDX 0 +#define STRING_PRODUCT_IDX 1 +#define STRING_DESCRIPTION_IDX 2 -/* circular buffer */ -struct gs_buf { - unsigned int buf_size; - char *buf_buf; - char *buf_get; - char *buf_put; -}; +static char manufacturer[50]; -/* the port structure holds info for each port, one for each minor number */ -struct gs_port { - struct gs_dev *port_dev; /* pointer to device struct */ - struct tty_struct *port_tty; /* pointer to tty struct */ - spinlock_t port_lock; - int port_num; - int port_open_count; - int port_in_use; /* open/close in progress */ - wait_queue_head_t port_write_wait;/* waiting to write */ - struct gs_buf *port_write_buf; - struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */ - u16 port_handshake_bits; -#define RS232_RTS (1 << 1) -#define RS232_DTE (1 << 0) +static struct usb_string strings_dev[] = { + [STRING_MANUFACTURER_IDX].s = manufacturer, + [STRING_PRODUCT_IDX].s = GS_VERSION_NAME, + [STRING_DESCRIPTION_IDX].s = NULL /* updated; f(use_acm) */, + { } /* end of list */ }; -/* the device structure holds info for the USB device */ -struct gs_dev { - struct usb_gadget *dev_gadget; /* gadget device pointer */ - spinlock_t dev_lock; /* lock for set/reset config */ - int dev_config; /* configuration number */ - struct usb_ep *dev_notify_ep; /* address of notify endpoint */ - struct usb_ep *dev_in_ep; /* address of in endpoint */ - struct usb_ep *dev_out_ep; /* address of out endpoint */ - struct usb_endpoint_descriptor /* descriptor of notify ep */ - *dev_notify_ep_desc; - struct usb_endpoint_descriptor /* descriptor of in endpoint */ - *dev_in_ep_desc; - struct usb_endpoint_descriptor /* descriptor of out endpoint */ - *dev_out_ep_desc; - struct usb_request *dev_ctrl_req; /* control request */ - struct list_head dev_req_list; /* list of write requests */ - int dev_sched_port; /* round robin port scheduled */ - struct gs_port *dev_port[GS_NUM_PORTS]; /* the ports */ +static struct usb_gadget_strings stringtab_dev = { + .language = 0x0409, /* en-us */ + .strings = strings_dev, }; - -/* Functions */ - -/* tty driver internals */ -static int gs_send(struct gs_dev *dev); -static int gs_send_packet(struct gs_dev *dev, char *packet, - unsigned int size); -static int gs_recv_packet(struct gs_dev *dev, char *packet, - unsigned int size); -static void gs_read_complete(struct usb_ep *ep, struct usb_request *req); -static void gs_write_complete(struct usb_ep *ep, struct usb_request *req); - -/* gadget driver internals */ -static int gs_set_config(struct gs_dev *dev, unsigned config); -static void gs_reset_config(struct gs_dev *dev); -static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, - u8 type, unsigned int index, int is_otg); - -static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len, - gfp_t kmalloc_flags); -static void gs_free_req(struct usb_ep *ep, struct usb_request *req); - -static int gs_alloc_ports(struct gs_dev *dev, gfp_t kmalloc_flags); -static void gs_free_ports(struct gs_dev *dev); - -/* circular buffer */ -static struct gs_buf *gs_buf_alloc(unsigned int size, gfp_t kmalloc_flags); -static void gs_buf_free(struct gs_buf *gb); -static void gs_buf_clear(struct gs_buf *gb); -static unsigned int gs_buf_data_avail(struct gs_buf *gb); -static unsigned int gs_buf_space_avail(struct gs_buf *gb); -static unsigned int gs_buf_put(struct gs_buf *gb, const char *buf, - unsigned int count); -static unsigned int gs_buf_get(struct gs_buf *gb, char *buf, - unsigned int count); - - -/* Globals */ - -static struct gs_dev *gs_device; - -static struct mutex gs_open_close_lock[GS_NUM_PORTS]; - - -/*-------------------------------------------------------------------------*/ - -/* USB descriptors */ - -#define GS_MANUFACTURER_STR_ID 1 -#define GS_PRODUCT_STR_ID 2 -#define GS_SERIAL_STR_ID 3 -#define GS_BULK_CONFIG_STR_ID 4 -#define GS_ACM_CONFIG_STR_ID 5 -#define GS_CONTROL_STR_ID 6 -#define GS_DATA_STR_ID 7 - -/* static strings, in UTF-8 */ -static char manufacturer[50]; -static struct usb_string gs_strings[] = { - { GS_MANUFACTURER_STR_ID, manufacturer }, - { GS_PRODUCT_STR_ID, GS_LONG_NAME }, - { GS_BULK_CONFIG_STR_ID, "Gadget Serial Bulk" }, - { GS_ACM_CONFIG_STR_ID, "Gadget Serial CDC ACM" }, - { GS_CONTROL_STR_ID, "Gadget Serial Control" }, - { GS_DATA_STR_ID, "Gadget Serial Data" }, - { } /* end of list */ -}; - -static struct usb_gadget_strings gs_string_table = { - .language = 0x0409, /* en-us */ - .strings = gs_strings, +static struct usb_gadget_strings *dev_strings[] = { + &stringtab_dev, + NULL, }; -static struct usb_device_descriptor gs_device_desc = { +static struct usb_device_descriptor device_desc = { .bLength = USB_DT_DEVICE_SIZE, .bDescriptorType = USB_DT_DEVICE, .bcdUSB = __constant_cpu_to_le16(0x0200), + /* .bDeviceClass = f(use_acm) */ .bDeviceSubClass = 0, .bDeviceProtocol = 0, + /* .bMaxPacketSize0 = f(hardware) */ .idVendor = __constant_cpu_to_le16(GS_VENDOR_ID), - .idProduct = __constant_cpu_to_le16(GS_PRODUCT_ID), - .iManufacturer = GS_MANUFACTURER_STR_ID, - .iProduct = GS_PRODUCT_STR_ID, - .bNumConfigurations = GS_NUM_CONFIGS, + /* .idProduct = f(use_acm) */ + /* .bcdDevice = f(hardware) */ + /* .iManufacturer = DYNAMIC */ + /* .iProduct = DYNAMIC */ + .bNumConfigurations = 1, }; -static struct usb_otg_descriptor gs_otg_descriptor = { - .bLength = sizeof(gs_otg_descriptor), +static struct usb_otg_descriptor otg_descriptor = { + .bLength = sizeof otg_descriptor, .bDescriptorType = USB_DT_OTG, - .bmAttributes = USB_OTG_SRP, -}; - -static struct usb_config_descriptor gs_bulk_config_desc = { - .bLength = USB_DT_CONFIG_SIZE, - .bDescriptorType = USB_DT_CONFIG, - /* .wTotalLength computed dynamically */ - .bNumInterfaces = 1, - .bConfigurationValue = GS_BULK_CONFIG_ID, - .iConfiguration = GS_BULK_CONFIG_STR_ID, - .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, - .bMaxPower = 1, -}; - -static struct usb_config_descriptor gs_acm_config_desc = { - .bLength = USB_DT_CONFIG_SIZE, - .bDescriptorType = USB_DT_CONFIG, - /* .wTotalLength computed dynamically */ - .bNumInterfaces = 2, - .bConfigurationValue = GS_ACM_CONFIG_ID, - .iConfiguration = GS_ACM_CONFIG_STR_ID, - .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, - .bMaxPower = 1, -}; - -static const struct usb_interface_descriptor gs_bulk_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = GS_BULK_INTERFACE_ID, - .bNumEndpoints = 2, - .bInterfaceClass = USB_CLASS_VENDOR_SPEC, - .bInterfaceSubClass = 0, - .bInterfaceProtocol = 0, - .iInterface = GS_DATA_STR_ID, -}; - -static const struct usb_interface_descriptor gs_control_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = GS_CONTROL_INTERFACE_ID, - .bNumEndpoints = 1, - .bInterfaceClass = USB_CLASS_COMM, - .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, - .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER, - .iInterface = GS_CONTROL_STR_ID, -}; - -static const struct usb_interface_descriptor gs_data_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = GS_DATA_INTERFACE_ID, - .bNumEndpoints = 2, - .bInterfaceClass = USB_CLASS_CDC_DATA, - .bInterfaceSubClass = 0, - .bInterfaceProtocol = 0, - .iInterface = GS_DATA_STR_ID, -}; - -static const struct usb_cdc_header_desc gs_header_desc = { - .bLength = sizeof(gs_header_desc), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_HEADER_TYPE, - .bcdCDC = __constant_cpu_to_le16(0x0110), -}; - -static const struct usb_cdc_call_mgmt_descriptor gs_call_mgmt_descriptor = { - .bLength = sizeof(gs_call_mgmt_descriptor), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, - .bmCapabilities = 0, - .bDataInterface = 1, /* index of data interface */ -}; - -static struct usb_cdc_acm_descriptor gs_acm_descriptor = { - .bLength = sizeof(gs_acm_descriptor), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_ACM_TYPE, - .bmCapabilities = (1 << 1), -}; - -static const struct usb_cdc_union_desc gs_union_desc = { - .bLength = sizeof(gs_union_desc), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubType = USB_CDC_UNION_TYPE, - .bMasterInterface0 = 0, /* index of control interface */ - .bSlaveInterface0 = 1, /* index of data interface */ -}; - -static struct usb_endpoint_descriptor gs_fullspeed_notify_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_IN, - .bmAttributes = USB_ENDPOINT_XFER_INT, - .wMaxPacketSize = __constant_cpu_to_le16(GS_NOTIFY_MAXPACKET), - .bInterval = 1 << GS_LOG2_NOTIFY_INTERVAL, -}; - -static struct usb_endpoint_descriptor gs_fullspeed_in_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_IN, - .bmAttributes = USB_ENDPOINT_XFER_BULK, -}; - -static struct usb_endpoint_descriptor gs_fullspeed_out_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_OUT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, -}; - -static const struct usb_descriptor_header *gs_bulk_fullspeed_function[] = { - (struct usb_descriptor_header *) &gs_otg_descriptor, - (struct usb_descriptor_header *) &gs_bulk_interface_desc, - (struct usb_descriptor_header *) &gs_fullspeed_in_desc, - (struct usb_descriptor_header *) &gs_fullspeed_out_desc, - NULL, -}; - -static const struct usb_descriptor_header *gs_acm_fullspeed_function[] = { - (struct usb_descriptor_header *) &gs_otg_descriptor, - (struct usb_descriptor_header *) &gs_control_interface_desc, - (struct usb_descriptor_header *) &gs_header_desc, - (struct usb_descriptor_header *) &gs_call_mgmt_descriptor, - (struct usb_descriptor_header *) &gs_acm_descriptor, - (struct usb_descriptor_header *) &gs_union_desc, - (struct usb_descriptor_header *) &gs_fullspeed_notify_desc, - (struct usb_descriptor_header *) &gs_data_interface_desc, - (struct usb_descriptor_header *) &gs_fullspeed_in_desc, - (struct usb_descriptor_header *) &gs_fullspeed_out_desc, - NULL, -}; -static struct usb_endpoint_descriptor gs_highspeed_notify_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_IN, - .bmAttributes = USB_ENDPOINT_XFER_INT, - .wMaxPacketSize = __constant_cpu_to_le16(GS_NOTIFY_MAXPACKET), - .bInterval = GS_LOG2_NOTIFY_INTERVAL+4, -}; - -static struct usb_endpoint_descriptor gs_highspeed_in_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = __constant_cpu_to_le16(512), -}; - -static struct usb_endpoint_descriptor gs_highspeed_out_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = __constant_cpu_to_le16(512), -}; - -static struct usb_qualifier_descriptor gs_qualifier_desc = { - .bLength = sizeof(struct usb_qualifier_descriptor), - .bDescriptorType = USB_DT_DEVICE_QUALIFIER, - .bcdUSB = __constant_cpu_to_le16 (0x0200), - /* assumes ep0 uses the same value for both speeds ... */ - .bNumConfigurations = GS_NUM_CONFIGS, -}; - -static const struct usb_descriptor_header *gs_bulk_highspeed_function[] = { - (struct usb_descriptor_header *) &gs_otg_descriptor, - (struct usb_descriptor_header *) &gs_bulk_interface_desc, - (struct usb_descriptor_header *) &gs_highspeed_in_desc, - (struct usb_descriptor_header *) &gs_highspeed_out_desc, - NULL, + /* REVISIT SRP-only hardware is possible, although + * it would not be called "OTG" ... + */ + .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, }; -static const struct usb_descriptor_header *gs_acm_highspeed_function[] = { - (struct usb_descriptor_header *) &gs_otg_descriptor, - (struct usb_descriptor_header *) &gs_control_interface_desc, - (struct usb_descriptor_header *) &gs_header_desc, - (struct usb_descriptor_header *) &gs_call_mgmt_descriptor, - (struct usb_descriptor_header *) &gs_acm_descriptor, - (struct usb_descriptor_header *) &gs_union_desc, - (struct usb_descriptor_header *) &gs_highspeed_notify_desc, - (struct usb_descriptor_header *) &gs_data_interface_desc, - (struct usb_descriptor_header *) &gs_highspeed_in_desc, - (struct usb_descriptor_header *) &gs_highspeed_out_desc, +static const struct usb_descriptor_header *otg_desc[] = { + (struct usb_descriptor_header *) &otg_descriptor, NULL, }; - /*-------------------------------------------------------------------------*/ /* Module */ -MODULE_DESCRIPTION(GS_LONG_NAME); +MODULE_DESCRIPTION(GS_VERSION_NAME); MODULE_AUTHOR("Al Borchers"); +MODULE_AUTHOR("David Brownell"); MODULE_LICENSE("GPL"); -#ifdef DEBUG -module_param(debug, int, S_IRUGO|S_IWUSR); -MODULE_PARM_DESC(debug, "Enable debugging, 0=off, 1=on"); -#endif - -static unsigned int read_q_size = GS_DEFAULT_READ_Q_SIZE; -module_param(read_q_size, uint, S_IRUGO); -MODULE_PARM_DESC(read_q_size, "Read request queue size, default=32"); - -static unsigned int write_q_size = GS_DEFAULT_WRITE_Q_SIZE; -module_param(write_q_size, uint, S_IRUGO); -MODULE_PARM_DESC(write_q_size, "Write request queue size, default=32"); +static int use_acm = true; +module_param(use_acm, bool, 0); +MODULE_PARM_DESC(use_acm, "Use CDC ACM, default=yes"); -static unsigned int write_buf_size = GS_DEFAULT_WRITE_BUF_SIZE; -module_param(write_buf_size, uint, S_IRUGO); -MODULE_PARM_DESC(write_buf_size, "Write buffer size, default=8192"); - -static unsigned int use_acm = GS_DEFAULT_USE_ACM; -module_param(use_acm, uint, S_IRUGO); -MODULE_PARM_DESC(use_acm, "Use CDC ACM, 0=no, 1=yes, default=no"); +static unsigned n_ports = 1; +module_param(n_ports, uint, 0); +MODULE_PARM_DESC(n_ports, "number of ports to create, default=1"); /*-------------------------------------------------------------------------*/ -/* TTY Driver */ - -/* - * gs_open - */ -static int gs_open(struct tty_struct *tty, struct file *file) -{ - int port_num; - unsigned long flags; - struct gs_port *port; - struct gs_dev *dev; - struct gs_buf *buf; - struct mutex *mtx; - int ret; - - port_num = tty->index; - - gs_debug("gs_open: (%d,%p,%p)\n", port_num, tty, file); - - if (port_num < 0 || port_num >= GS_NUM_PORTS) { - pr_err("gs_open: (%d,%p,%p) invalid port number\n", - port_num, tty, file); - return -ENODEV; - } - - dev = gs_device; - - if (dev == NULL) { - pr_err("gs_open: (%d,%p,%p) NULL device pointer\n", - port_num, tty, file); - return -ENODEV; - } - - mtx = &gs_open_close_lock[port_num]; - if (mutex_lock_interruptible(mtx)) { - pr_err("gs_open: (%d,%p,%p) interrupted waiting for mutex\n", - port_num, tty, file); - return -ERESTARTSYS; - } - - spin_lock_irqsave(&dev->dev_lock, flags); - - if (dev->dev_config == GS_NO_CONFIG_ID) { - pr_err("gs_open: (%d,%p,%p) device is not connected\n", - port_num, tty, file); - ret = -ENODEV; - goto exit_unlock_dev; - } - - port = dev->dev_port[port_num]; - - if (port == NULL) { - pr_err("gs_open: (%d,%p,%p) NULL port pointer\n", - port_num, tty, file); - ret = -ENODEV; - goto exit_unlock_dev; - } - - spin_lock(&port->port_lock); - spin_unlock(&dev->dev_lock); - - if (port->port_dev == NULL) { - pr_err("gs_open: (%d,%p,%p) port disconnected (1)\n", - port_num, tty, file); - ret = -EIO; - goto exit_unlock_port; - } - - if (port->port_open_count > 0) { - ++port->port_open_count; - gs_debug("gs_open: (%d,%p,%p) already open\n", - port_num, tty, file); - ret = 0; - goto exit_unlock_port; - } - - tty->driver_data = NULL; - - /* mark port as in use, we can drop port lock and sleep if necessary */ - port->port_in_use = 1; - - /* allocate write buffer on first open */ - if (port->port_write_buf == NULL) { - spin_unlock_irqrestore(&port->port_lock, flags); - buf = gs_buf_alloc(write_buf_size, GFP_KERNEL); - spin_lock_irqsave(&port->port_lock, flags); - - /* might have been disconnected while asleep, check */ - if (port->port_dev == NULL) { - pr_err("gs_open: (%d,%p,%p) port disconnected (2)\n", - port_num, tty, file); - port->port_in_use = 0; - ret = -EIO; - goto exit_unlock_port; - } - - if ((port->port_write_buf=buf) == NULL) { - pr_err("gs_open: (%d,%p,%p) cannot allocate " - "port write buffer\n", - port_num, tty, file); - port->port_in_use = 0; - ret = -ENOMEM; - goto exit_unlock_port; - } - - } - - /* wait for carrier detect (not implemented) */ - - /* might have been disconnected while asleep, check */ - if (port->port_dev == NULL) { - pr_err("gs_open: (%d,%p,%p) port disconnected (3)\n", - port_num, tty, file); - port->port_in_use = 0; - ret = -EIO; - goto exit_unlock_port; - } - - tty->driver_data = port; - port->port_tty = tty; - port->port_open_count = 1; - port->port_in_use = 0; - - gs_debug("gs_open: (%d,%p,%p) completed\n", port_num, tty, file); - - ret = 0; - -exit_unlock_port: - spin_unlock_irqrestore(&port->port_lock, flags); - mutex_unlock(mtx); - return ret; - -exit_unlock_dev: - spin_unlock_irqrestore(&dev->dev_lock, flags); - mutex_unlock(mtx); - return ret; - -} - -/* - * gs_close - */ - -static int gs_write_finished_event_safely(struct gs_port *p) -{ - int cond; - - spin_lock_irq(&(p)->port_lock); - cond = !(p)->port_dev || !gs_buf_data_avail((p)->port_write_buf); - spin_unlock_irq(&(p)->port_lock); - return cond; -} - -static void gs_close(struct tty_struct *tty, struct file *file) -{ - struct gs_port *port = tty->driver_data; - struct mutex *mtx; - - if (port == NULL) { - pr_err("gs_close: NULL port pointer\n"); - return; - } - - gs_debug("gs_close: (%d,%p,%p)\n", port->port_num, tty, file); - - mtx = &gs_open_close_lock[port->port_num]; - mutex_lock(mtx); - - spin_lock_irq(&port->port_lock); - - if (port->port_open_count == 0) { - pr_err("gs_close: (%d,%p,%p) port is already closed\n", - port->port_num, tty, file); - goto exit; - } - - if (port->port_open_count > 1) { - --port->port_open_count; - goto exit; - } - - /* free disconnected port on final close */ - if (port->port_dev == NULL) { - kfree(port); - goto exit; - } - - /* mark port as closed but in use, we can drop port lock */ - /* and sleep if necessary */ - port->port_in_use = 1; - port->port_open_count = 0; - - /* wait for write buffer to drain, or */ - /* at most GS_CLOSE_TIMEOUT seconds */ - if (gs_buf_data_avail(port->port_write_buf) > 0) { - spin_unlock_irq(&port->port_lock); - wait_event_interruptible_timeout(port->port_write_wait, - gs_write_finished_event_safely(port), - GS_CLOSE_TIMEOUT * HZ); - spin_lock_irq(&port->port_lock); - } - - /* free disconnected port on final close */ - /* (might have happened during the above sleep) */ - if (port->port_dev == NULL) { - kfree(port); - goto exit; - } - - gs_buf_clear(port->port_write_buf); - - tty->driver_data = NULL; - port->port_tty = NULL; - port->port_in_use = 0; - - gs_debug("gs_close: (%d,%p,%p) completed\n", - port->port_num, tty, file); - -exit: - spin_unlock_irq(&port->port_lock); - mutex_unlock(mtx); -} - -/* - * gs_write - */ -static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count) +static int __init serial_bind_config(struct usb_configuration *c) { - unsigned long flags; - struct gs_port *port = tty->driver_data; - int ret; - - if (port == NULL) { - pr_err("gs_write: NULL port pointer\n"); - return -EIO; - } - - gs_debug("gs_write: (%d,%p) writing %d bytes\n", port->port_num, tty, - count); - - if (count == 0) - return 0; - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_dev == NULL) { - pr_err("gs_write: (%d,%p) port is not connected\n", - port->port_num, tty); - ret = -EIO; - goto exit; - } - - if (port->port_open_count == 0) { - pr_err("gs_write: (%d,%p) port is closed\n", - port->port_num, tty); - ret = -EBADF; - goto exit; - } - - count = gs_buf_put(port->port_write_buf, buf, count); - - spin_unlock_irqrestore(&port->port_lock, flags); - - gs_send(gs_device); - - gs_debug("gs_write: (%d,%p) wrote %d bytes\n", port->port_num, tty, - count); + unsigned i; + int status = 0; - return count; - -exit: - spin_unlock_irqrestore(&port->port_lock, flags); - return ret; -} - -/* - * gs_put_char - */ -static int gs_put_char(struct tty_struct *tty, unsigned char ch) -{ - unsigned long flags; - struct gs_port *port = tty->driver_data; - int ret = 0; - - if (port == NULL) { - pr_err("gs_put_char: NULL port pointer\n"); - return 0; - } - - gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p\n", - port->port_num, tty, ch, __builtin_return_address(0)); - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_dev == NULL) { - pr_err("gs_put_char: (%d,%p) port is not connected\n", - port->port_num, tty); - goto exit; - } - - if (port->port_open_count == 0) { - pr_err("gs_put_char: (%d,%p) port is closed\n", - port->port_num, tty); - goto exit; - } - - ret = gs_buf_put(port->port_write_buf, &ch, 1); - -exit: - spin_unlock_irqrestore(&port->port_lock, flags); - return ret; -} - -/* - * gs_flush_chars - */ -static void gs_flush_chars(struct tty_struct *tty) -{ - unsigned long flags; - struct gs_port *port = tty->driver_data; - - if (port == NULL) { - pr_err("gs_flush_chars: NULL port pointer\n"); - return; - } - - gs_debug("gs_flush_chars: (%d,%p)\n", port->port_num, tty); - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_dev == NULL) { - pr_err("gs_flush_chars: (%d,%p) port is not connected\n", - port->port_num, tty); - goto exit; - } - - if (port->port_open_count == 0) { - pr_err("gs_flush_chars: (%d,%p) port is closed\n", - port->port_num, tty); - goto exit; - } - - spin_unlock_irqrestore(&port->port_lock, flags); - - gs_send(gs_device); - - return; - -exit: - spin_unlock_irqrestore(&port->port_lock, flags); -} - -/* - * gs_write_room - */ -static int gs_write_room(struct tty_struct *tty) -{ - - int room = 0; - unsigned long flags; - struct gs_port *port = tty->driver_data; - - - if (port == NULL) - return 0; - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_dev != NULL && port->port_open_count > 0 - && port->port_write_buf != NULL) - room = gs_buf_space_avail(port->port_write_buf); - - spin_unlock_irqrestore(&port->port_lock, flags); - - gs_debug("gs_write_room: (%d,%p) room=%d\n", - port->port_num, tty, room); - - return room; -} - -/* - * gs_chars_in_buffer - */ -static int gs_chars_in_buffer(struct tty_struct *tty) -{ - int chars = 0; - unsigned long flags; - struct gs_port *port = tty->driver_data; - - if (port == NULL) - return 0; - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_dev != NULL && port->port_open_count > 0 - && port->port_write_buf != NULL) - chars = gs_buf_data_avail(port->port_write_buf); - - spin_unlock_irqrestore(&port->port_lock, flags); - - gs_debug("gs_chars_in_buffer: (%d,%p) chars=%d\n", - port->port_num, tty, chars); - - return chars; -} - -/* - * gs_throttle - */ -static void gs_throttle(struct tty_struct *tty) -{ -} - -/* - * gs_unthrottle - */ -static void gs_unthrottle(struct tty_struct *tty) -{ -} - -/* - * gs_break - */ -static void gs_break(struct tty_struct *tty, int break_state) -{ -} - -/* - * gs_ioctl - */ -static int gs_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) -{ - struct gs_port *port = tty->driver_data; - - if (port == NULL) { - pr_err("gs_ioctl: NULL port pointer\n"); - return -EIO; + for (i = 0; i < n_ports && status == 0; i++) { + if (use_acm) + status = acm_bind_config(c, i); + else + status = gser_bind_config(c, i); } - - gs_debug("gs_ioctl: (%d,%p,%p) cmd=0x%4.4x, arg=%lu\n", - port->port_num, tty, file, cmd, arg); - - /* handle ioctls */ - - /* could not handle ioctl */ - return -ENOIOCTLCMD; -} - -/* - * gs_set_termios - */ -static void gs_set_termios(struct tty_struct *tty, struct ktermios *old) -{ + return status; } -static const struct tty_operations gs_tty_ops = { - .open = gs_open, - .close = gs_close, - .write = gs_write, - .put_char = gs_put_char, - .flush_chars = gs_flush_chars, - .write_room = gs_write_room, - .ioctl = gs_ioctl, - .set_termios = gs_set_termios, - .throttle = gs_throttle, - .unthrottle = gs_unthrottle, - .break_ctl = gs_break, - .chars_in_buffer = gs_chars_in_buffer, +static struct usb_configuration serial_config_driver = { + /* .label = f(use_acm) */ + .bind = serial_bind_config, + /* .bConfigurationValue = f(use_acm) */ + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, + .bMaxPower = 1, /* 2 mA, minimal */ }; -/*-------------------------------------------------------------------------*/ - -/* -* gs_send -* -* This function finds available write requests, calls -* gs_send_packet to fill these packets with data, and -* continues until either there are no more write requests -* available or no more data to send. This function is -* run whenever data arrives or write requests are available. -*/ -static int gs_send(struct gs_dev *dev) -{ - int ret,len; - unsigned long flags; - struct usb_ep *ep; - struct usb_request *req; - - if (dev == NULL) { - pr_err("gs_send: NULL device pointer\n"); - return -ENODEV; - } - - spin_lock_irqsave(&dev->dev_lock, flags); - - ep = dev->dev_in_ep; - - while(!list_empty(&dev->dev_req_list)) { - - req = list_entry(dev->dev_req_list.next, - struct usb_request, list); - - len = gs_send_packet(dev, req->buf, ep->maxpacket); - - if (len > 0) { - gs_debug_level(3, "gs_send: len=%d, 0x%2.2x " - "0x%2.2x 0x%2.2x ...\n", len, - *((unsigned char *)req->buf), - *((unsigned char *)req->buf+1), - *((unsigned char *)req->buf+2)); - list_del(&req->list); - req->length = len; - spin_unlock_irqrestore(&dev->dev_lock, flags); - if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { - pr_err( - "gs_send: cannot queue read request, ret=%d\n", - ret); - spin_lock_irqsave(&dev->dev_lock, flags); - break; - } - spin_lock_irqsave(&dev->dev_lock, flags); - } else { - break; - } - - } - - spin_unlock_irqrestore(&dev->dev_lock, flags); - - return 0; -} - -/* - * gs_send_packet - * - * If there is data to send, a packet is built in the given - * buffer and the size is returned. If there is no data to - * send, 0 is returned. If there is any error a negative - * error number is returned. - * - * Called during USB completion routine, on interrupt time. - * - * We assume that disconnect will not happen until all completion - * routines have completed, so we can assume that the dev_port - * array does not change during the lifetime of this function. - */ -static int gs_send_packet(struct gs_dev *dev, char *packet, unsigned int size) -{ - unsigned int len; - struct gs_port *port; - - /* TEMPORARY -- only port 0 is supported right now */ - port = dev->dev_port[0]; - - if (port == NULL) { - pr_err("gs_send_packet: port=%d, NULL port pointer\n", 0); - return -EIO; - } - - spin_lock(&port->port_lock); - - len = gs_buf_data_avail(port->port_write_buf); - if (len < size) - size = len; - - if (size == 0) - goto exit; - - size = gs_buf_get(port->port_write_buf, packet, size); - - if (port->port_tty) - wake_up_interruptible(&port->port_tty->write_wait); - -exit: - spin_unlock(&port->port_lock); - return size; -} - -/* - * gs_recv_packet - * - * Called for each USB packet received. Reads the packet - * header and stuffs the data in the appropriate tty buffer. - * Returns 0 if successful, or a negative error number. - * - * Called during USB completion routine, on interrupt time. - * - * We assume that disconnect will not happen until all completion - * routines have completed, so we can assume that the dev_port - * array does not change during the lifetime of this function. - */ -static int gs_recv_packet(struct gs_dev *dev, char *packet, unsigned int size) -{ - unsigned int len; - struct gs_port *port; - int ret; - struct tty_struct *tty; - - /* TEMPORARY -- only port 0 is supported right now */ - port = dev->dev_port[0]; - - if (port == NULL) { - pr_err("gs_recv_packet: port=%d, NULL port pointer\n", - port->port_num); - return -EIO; - } - - spin_lock(&port->port_lock); - - if (port->port_open_count == 0) { - pr_err("gs_recv_packet: port=%d, port is closed\n", - port->port_num); - ret = -EIO; - goto exit; - } - - - tty = port->port_tty; - - if (tty == NULL) { - pr_err("gs_recv_packet: port=%d, NULL tty pointer\n", - port->port_num); - ret = -EIO; - goto exit; - } - - if (port->port_tty->magic != TTY_MAGIC) { - pr_err("gs_recv_packet: port=%d, bad tty magic\n", - port->port_num); - ret = -EIO; - goto exit; - } - - len = tty_buffer_request_room(tty, size); - if (len > 0) { - tty_insert_flip_string(tty, packet, len); - tty_flip_buffer_push(port->port_tty); - wake_up_interruptible(&port->port_tty->read_wait); - } - ret = 0; -exit: - spin_unlock(&port->port_lock); - return ret; -} - -/* -* gs_read_complete -*/ -static void gs_read_complete(struct usb_ep *ep, struct usb_request *req) +static int __init gs_bind(struct usb_composite_dev *cdev) { - int ret; - struct gs_dev *dev = ep->driver_data; - - if (dev == NULL) { - pr_err("gs_read_complete: NULL device pointer\n"); - return; - } + int gcnum; + struct usb_gadget *gadget = cdev->gadget; + int status; - switch(req->status) { - case 0: - /* normal completion */ - gs_recv_packet(dev, req->buf, req->actual); -requeue: - req->length = ep->maxpacket; - if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { - pr_err( - "gs_read_complete: cannot queue read request, ret=%d\n", - ret); - } - break; - - case -ESHUTDOWN: - /* disconnect */ - gs_debug("gs_read_complete: shutdown\n"); - gs_free_req(ep, req); - break; - - default: - /* unexpected */ - pr_err( - "gs_read_complete: unexpected status error, status=%d\n", - req->status); - goto requeue; - break; - } -} - -/* -* gs_write_complete -*/ -static void gs_write_complete(struct usb_ep *ep, struct usb_request *req) -{ - struct gs_dev *dev = ep->driver_data; - - if (dev == NULL) { - pr_err("gs_write_complete: NULL device pointer\n"); - return; - } + status = gserial_setup(cdev->gadget, n_ports); + if (status < 0) + return status; - switch(req->status) { - case 0: - /* normal completion */ -requeue: - spin_lock(&dev->dev_lock); - list_add(&req->list, &dev->dev_req_list); - spin_unlock(&dev->dev_lock); - - gs_send(dev); - - break; - - case -ESHUTDOWN: - /* disconnect */ - gs_debug("gs_write_complete: shutdown\n"); - gs_free_req(ep, req); - break; - - default: - pr_err( - "gs_write_complete: unexpected status error, status=%d\n", - req->status); - goto requeue; - break; - } -} + /* Allocate string descriptor numbers ... note that string + * contents can be overridden by the composite_dev glue. + */ -/*-------------------------------------------------------------------------*/ + /* device description: manufacturer, product */ + snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", + init_utsname()->sysname, init_utsname()->release, + gadget->name); + status = usb_string_id(cdev); + if (status < 0) + goto fail; + strings_dev[STRING_MANUFACTURER_IDX].id = status; -/* Gadget Driver */ + device_desc.iManufacturer = status; -/* - * gs_unbind - * - * Called on module unload. Frees the control request and device - * structure. - */ -static void /* __init_or_exit */ gs_unbind(struct usb_gadget *gadget) -{ - struct gs_dev *dev = get_gadget_data(gadget); + status = usb_string_id(cdev); + if (status < 0) + goto fail; + strings_dev[STRING_PRODUCT_IDX].id = status; - gs_device = NULL; + device_desc.iProduct = status; - /* read/write requests already freed, only control request remains */ - if (dev != NULL) { - if (dev->dev_ctrl_req != NULL) { - gs_free_req(gadget->ep0, dev->dev_ctrl_req); - dev->dev_ctrl_req = NULL; - } - gs_reset_config(dev); - gs_free_ports(dev); - kfree(dev); - set_gadget_data(gadget, NULL); - } + /* config description */ + status = usb_string_id(cdev); + if (status < 0) + goto fail; + strings_dev[STRING_DESCRIPTION_IDX].id = status; - pr_info("gs_unbind: %s %s unbound\n", GS_LONG_NAME, - GS_VERSION_STR); -} - -/* - * gs_bind - * - * Called on module load. Allocates and initializes the device - * structure and a control request. - */ -static int __init gs_bind(struct usb_gadget *gadget) -{ - int ret; - struct usb_ep *ep; - struct gs_dev *dev; - int gcnum; - - /* Some controllers can't support CDC ACM: - * - sh doesn't support multiple interfaces or configs; - * - sa1100 doesn't have a third interrupt endpoint - */ - if (gadget_is_sh(gadget) || gadget_is_sa1100(gadget)) - use_acm = 0; + serial_config_driver.iConfiguration = status; + /* set up other descriptors */ gcnum = usb_gadget_controller_number(gadget); if (gcnum >= 0) - gs_device_desc.bcdDevice = - cpu_to_le16(GS_VERSION_NUM | gcnum); + device_desc.bcdDevice = cpu_to_le16(GS_VERSION_NUM | gcnum); else { + /* this is so simple (for now, no altsettings) that it + * SHOULD NOT have problems with bulk-capable hardware. + * so warn about unrcognized controllers -- don't panic. + * + * things like configuration and altsetting numbering + * can need hardware-specific attention though. + */ pr_warning("gs_bind: controller '%s' not recognized\n", gadget->name); - /* unrecognized, but safe unless bulk is REALLY quirky */ - gs_device_desc.bcdDevice = - __constant_cpu_to_le16(GS_VERSION_NUM|0x0099); - } - - dev = kzalloc(sizeof(struct gs_dev), GFP_KERNEL); - if (dev == NULL) - return -ENOMEM; - - usb_ep_autoconfig_reset(gadget); - - ep = usb_ep_autoconfig(gadget, &gs_fullspeed_in_desc); - if (!ep) - goto autoconf_fail; - dev->dev_in_ep = ep; - ep->driver_data = dev; /* claim the endpoint */ - - ep = usb_ep_autoconfig(gadget, &gs_fullspeed_out_desc); - if (!ep) - goto autoconf_fail; - dev->dev_out_ep = ep; - ep->driver_data = dev; /* claim the endpoint */ - - if (use_acm) { - ep = usb_ep_autoconfig(gadget, &gs_fullspeed_notify_desc); - if (!ep) { - pr_err("gs_bind: cannot run ACM on %s\n", gadget->name); - goto autoconf_fail; - } - gs_device_desc.idProduct = __constant_cpu_to_le16( - GS_CDC_PRODUCT_ID), - dev->dev_notify_ep = ep; - ep->driver_data = dev; /* claim the endpoint */ - } - - gs_device_desc.bDeviceClass = use_acm - ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; - gs_device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; - - if (gadget_is_dualspeed(gadget)) { - gs_qualifier_desc.bDeviceClass = use_acm - ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; - /* assume ep0 uses the same packet size for both speeds */ - gs_qualifier_desc.bMaxPacketSize0 = - gs_device_desc.bMaxPacketSize0; - /* assume endpoints are dual-speed */ - gs_highspeed_notify_desc.bEndpointAddress = - gs_fullspeed_notify_desc.bEndpointAddress; - gs_highspeed_in_desc.bEndpointAddress = - gs_fullspeed_in_desc.bEndpointAddress; - gs_highspeed_out_desc.bEndpointAddress = - gs_fullspeed_out_desc.bEndpointAddress; - } - - usb_gadget_set_selfpowered(gadget); - - if (gadget_is_otg(gadget)) { - gs_otg_descriptor.bmAttributes |= USB_OTG_HNP, - gs_bulk_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; - gs_acm_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; + device_desc.bcdDevice = + __constant_cpu_to_le16(GS_VERSION_NUM | 0x0099); } - gs_device = dev; - - snprintf(manufacturer, sizeof(manufacturer), "%s %s with %s", - init_utsname()->sysname, init_utsname()->release, - gadget->name); - - dev->dev_gadget = gadget; - spin_lock_init(&dev->dev_lock); - INIT_LIST_HEAD(&dev->dev_req_list); - set_gadget_data(gadget, dev); - - if ((ret=gs_alloc_ports(dev, GFP_KERNEL)) != 0) { - pr_err("gs_bind: cannot allocate ports\n"); - gs_unbind(gadget); - return ret; + if (gadget_is_otg(cdev->gadget)) { + serial_config_driver.descriptors = otg_desc; + serial_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; } - /* preallocate control response and buffer */ - dev->dev_ctrl_req = gs_alloc_req(gadget->ep0, GS_MAX_DESC_LEN, - GFP_KERNEL); - if (dev->dev_ctrl_req == NULL) { - gs_unbind(gadget); - return -ENOMEM; - } - gadget->ep0->driver_data = dev; + /* register our configuration */ + status = usb_add_config(cdev, &serial_config_driver); + if (status < 0) + goto fail; - pr_info("gs_bind: %s %s bound\n", - GS_LONG_NAME, GS_VERSION_STR); + INFO(cdev, "%s\n", GS_VERSION_NAME); return 0; -autoconf_fail: - kfree(dev); - pr_err("gs_bind: cannot autoconfigure on %s\n", gadget->name); - return -ENODEV; -} - -static int gs_setup_standard(struct usb_gadget *gadget, - const struct usb_ctrlrequest *ctrl) -{ - int ret = -EOPNOTSUPP; - struct gs_dev *dev = get_gadget_data(gadget); - struct usb_request *req = dev->dev_ctrl_req; - u16 wIndex = le16_to_cpu(ctrl->wIndex); - u16 wValue = le16_to_cpu(ctrl->wValue); - u16 wLength = le16_to_cpu(ctrl->wLength); - - switch (ctrl->bRequest) { - case USB_REQ_GET_DESCRIPTOR: - if (ctrl->bRequestType != USB_DIR_IN) - break; - - switch (wValue >> 8) { - case USB_DT_DEVICE: - ret = min(wLength, - (u16)sizeof(struct usb_device_descriptor)); - memcpy(req->buf, &gs_device_desc, ret); - break; - - case USB_DT_DEVICE_QUALIFIER: - if (!gadget_is_dualspeed(gadget)) - break; - ret = min(wLength, - (u16)sizeof(struct usb_qualifier_descriptor)); - memcpy(req->buf, &gs_qualifier_desc, ret); - break; - - case USB_DT_OTHER_SPEED_CONFIG: - if (!gadget_is_dualspeed(gadget)) - break; - /* fall through */ - case USB_DT_CONFIG: - ret = gs_build_config_buf(req->buf, gadget, - wValue >> 8, wValue & 0xff, - gadget_is_otg(gadget)); - if (ret >= 0) - ret = min(wLength, (u16)ret); - break; - - case USB_DT_STRING: - /* wIndex == language code. */ - ret = usb_gadget_get_string(&gs_string_table, - wValue & 0xff, req->buf); - if (ret >= 0) - ret = min(wLength, (u16)ret); - break; - } - break; - - case USB_REQ_SET_CONFIGURATION: - if (ctrl->bRequestType != 0) - break; - spin_lock(&dev->dev_lock); - ret = gs_set_config(dev, wValue); - spin_unlock(&dev->dev_lock); - break; - - case USB_REQ_GET_CONFIGURATION: - if (ctrl->bRequestType != USB_DIR_IN) - break; - *(u8 *)req->buf = dev->dev_config; - ret = min(wLength, (u16)1); - break; - - case USB_REQ_SET_INTERFACE: - if (ctrl->bRequestType != USB_RECIP_INTERFACE - || !dev->dev_config - || wIndex >= GS_MAX_NUM_INTERFACES) - break; - if (dev->dev_config == GS_BULK_CONFIG_ID - && wIndex != GS_BULK_INTERFACE_ID) - break; - /* no alternate interface settings */ - if (wValue != 0) - break; - spin_lock(&dev->dev_lock); - /* PXA hardware partially handles SET_INTERFACE; - * we need to kluge around that interference. */ - if (gadget_is_pxa(gadget)) { - ret = gs_set_config(dev, use_acm ? - GS_ACM_CONFIG_ID : GS_BULK_CONFIG_ID); - goto set_interface_done; - } - if (dev->dev_config != GS_BULK_CONFIG_ID - && wIndex == GS_CONTROL_INTERFACE_ID) { - if (dev->dev_notify_ep) { - usb_ep_disable(dev->dev_notify_ep); - usb_ep_enable(dev->dev_notify_ep, dev->dev_notify_ep_desc); - } - } else { - usb_ep_disable(dev->dev_in_ep); - usb_ep_disable(dev->dev_out_ep); - usb_ep_enable(dev->dev_in_ep, dev->dev_in_ep_desc); - usb_ep_enable(dev->dev_out_ep, dev->dev_out_ep_desc); - } - ret = 0; -set_interface_done: - spin_unlock(&dev->dev_lock); - break; - - case USB_REQ_GET_INTERFACE: - if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) - || dev->dev_config == GS_NO_CONFIG_ID) - break; - if (wIndex >= GS_MAX_NUM_INTERFACES - || (dev->dev_config == GS_BULK_CONFIG_ID - && wIndex != GS_BULK_INTERFACE_ID)) { - ret = -EDOM; - break; - } - /* no alternate interface settings */ - *(u8 *)req->buf = 0; - ret = min(wLength, (u16)1); - break; - - default: - pr_err("gs_setup: unknown standard request, type=%02x, " - "request=%02x, value=%04x, index=%04x, length=%d\n", - ctrl->bRequestType, ctrl->bRequest, - wValue, wIndex, wLength); - break; - } - - return ret; +fail: + gserial_cleanup(); + return status; } -static void gs_setup_complete_set_line_coding(struct usb_ep *ep, - struct usb_request *req) -{ - struct gs_dev *dev = ep->driver_data; - struct gs_port *port = dev->dev_port[0]; /* ACM only has one port */ - - switch (req->status) { - case 0: - /* normal completion */ - if (req->actual != sizeof(port->port_line_coding)) - usb_ep_set_halt(ep); - else if (port) { - struct usb_cdc_line_coding *value = req->buf; - - /* REVISIT: we currently just remember this data. - * If we change that, (a) validate it first, then - * (b) update whatever hardware needs updating. - */ - spin_lock(&port->port_lock); - port->port_line_coding = *value; - spin_unlock(&port->port_lock); - } - break; - - case -ESHUTDOWN: - /* disconnect */ - gs_free_req(ep, req); - break; - - default: - /* unexpected */ - break; - } - return; -} - -static int gs_setup_class(struct usb_gadget *gadget, - const struct usb_ctrlrequest *ctrl) -{ - int ret = -EOPNOTSUPP; - struct gs_dev *dev = get_gadget_data(gadget); - struct gs_port *port = dev->dev_port[0]; /* ACM only has one port */ - struct usb_request *req = dev->dev_ctrl_req; - u16 wIndex = le16_to_cpu(ctrl->wIndex); - u16 wValue = le16_to_cpu(ctrl->wValue); - u16 wLength = le16_to_cpu(ctrl->wLength); - - switch (ctrl->bRequest) { - case USB_CDC_REQ_SET_LINE_CODING: - if (wLength != sizeof(struct usb_cdc_line_coding)) - break; - ret = wLength; - req->complete = gs_setup_complete_set_line_coding; - break; - - case USB_CDC_REQ_GET_LINE_CODING: - ret = min_t(int, wLength, sizeof(struct usb_cdc_line_coding)); - if (port) { - spin_lock(&port->port_lock); - memcpy(req->buf, &port->port_line_coding, ret); - spin_unlock(&port->port_lock); - } - break; - - case USB_CDC_REQ_SET_CONTROL_LINE_STATE: - if (wLength != 0) - break; - ret = 0; - if (port) { - /* REVISIT: we currently just remember this data. - * If we change that, update whatever hardware needs - * updating. - */ - spin_lock(&port->port_lock); - port->port_handshake_bits = wValue; - spin_unlock(&port->port_lock); - } - break; - - default: - /* NOTE: strictly speaking, we should accept AT-commands - * using SEND_ENCPSULATED_COMMAND/GET_ENCAPSULATED_RESPONSE. - * But our call management descriptor says we don't handle - * call management, so we should be able to get by without - * handling those "required" commands (except by stalling). - */ - pr_err("gs_setup: unknown class request, " - "type=%02x, request=%02x, value=%04x, " - "index=%04x, length=%d\n", - ctrl->bRequestType, ctrl->bRequest, - wValue, wIndex, wLength); - break; - } - - return ret; -} - -/* - * gs_setup_complete - */ -static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req) -{ - if (req->status || req->actual != req->length) { - pr_err("gs_setup_complete: status error, status=%d, " - "actual=%d, length=%d\n", - req->status, req->actual, req->length); - } -} - -/* - * gs_setup - * - * Implements all the control endpoint functionality that's not - * handled in hardware or the hardware driver. - * - * Returns the size of the data sent to the host, or a negative - * error number. - */ -static int gs_setup(struct usb_gadget *gadget, - const struct usb_ctrlrequest *ctrl) -{ - int ret = -EOPNOTSUPP; - struct gs_dev *dev = get_gadget_data(gadget); - struct usb_request *req = dev->dev_ctrl_req; - u16 wIndex = le16_to_cpu(ctrl->wIndex); - u16 wValue = le16_to_cpu(ctrl->wValue); - u16 wLength = le16_to_cpu(ctrl->wLength); - - req->complete = gs_setup_complete; - - switch (ctrl->bRequestType & USB_TYPE_MASK) { - case USB_TYPE_STANDARD: - ret = gs_setup_standard(gadget, ctrl); - break; - - case USB_TYPE_CLASS: - ret = gs_setup_class(gadget, ctrl); - break; - - default: - pr_err("gs_setup: unknown request, type=%02x, request=%02x, " - "value=%04x, index=%04x, length=%d\n", - ctrl->bRequestType, ctrl->bRequest, - wValue, wIndex, wLength); - break; - } - - /* respond with data transfer before status phase? */ - if (ret >= 0) { - req->length = ret; - req->zero = ret < wLength - && (ret % gadget->ep0->maxpacket) == 0; - ret = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); - if (ret < 0) { - pr_err("gs_setup: cannot queue response, ret=%d\n", - ret); - req->status = 0; - gs_setup_complete(gadget->ep0, req); - } - } - - /* device either stalls (ret < 0) or reports success */ - return ret; -} - -/* - * gs_disconnect - * - * Called when the device is disconnected. Frees the closed - * ports and disconnects open ports. Open ports will be freed - * on close. Then reallocates the ports for the next connection. - */ -static void gs_disconnect(struct usb_gadget *gadget) -{ - unsigned long flags; - struct gs_dev *dev = get_gadget_data(gadget); - - spin_lock_irqsave(&dev->dev_lock, flags); - - gs_reset_config(dev); - - /* free closed ports and disconnect open ports */ - /* (open ports will be freed when closed) */ - gs_free_ports(dev); - - /* re-allocate ports for the next connection */ - if (gs_alloc_ports(dev, GFP_ATOMIC) != 0) - pr_err("gs_disconnect: cannot re-allocate ports\n"); - - spin_unlock_irqrestore(&dev->dev_lock, flags); - - pr_info("gs_disconnect: %s disconnected\n", GS_LONG_NAME); -} - -static struct usb_gadget_driver gs_gadget_driver = { -#ifdef CONFIG_USB_GADGET_DUALSPEED - .speed = USB_SPEED_HIGH, -#else - .speed = USB_SPEED_FULL, -#endif /* CONFIG_USB_GADGET_DUALSPEED */ - .function = GS_LONG_NAME, - .bind = gs_bind, - .unbind = gs_unbind, - .setup = gs_setup, - .disconnect = gs_disconnect, - .driver = { - .name = GS_SHORT_NAME, - .owner = THIS_MODULE, - }, +static struct usb_composite_driver gserial_driver = { + .name = "g_serial", + .dev = &device_desc, + .strings = dev_strings, + .bind = gs_bind, }; -/* - * gs_set_config - * - * Configures the device by enabling device specific - * optimizations, setting up the endpoints, allocating - * read and write requests and queuing read requests. - * - * The device lock must be held when calling this function. - */ -static int gs_set_config(struct gs_dev *dev, unsigned config) +static int __init init(void) { - int i; - int ret = 0; - struct usb_gadget *gadget = dev->dev_gadget; - struct usb_ep *ep; - struct usb_endpoint_descriptor *out, *in, *notify; - struct usb_request *req; - - if (dev == NULL) { - pr_err("gs_set_config: NULL device pointer\n"); - return 0; - } - - if (config == dev->dev_config) - return 0; - - gs_reset_config(dev); - - switch (config) { - case GS_NO_CONFIG_ID: - return 0; - case GS_BULK_CONFIG_ID: - if (use_acm) - return -EINVAL; - break; - case GS_ACM_CONFIG_ID: - if (!use_acm) - return -EINVAL; - break; - default: - return -EINVAL; - } - - in = choose_ep_desc(gadget, - &gs_highspeed_in_desc, - &gs_fullspeed_in_desc); - out = choose_ep_desc(gadget, - &gs_highspeed_out_desc, - &gs_fullspeed_out_desc); - notify = dev->dev_notify_ep - ? choose_ep_desc(gadget, - &gs_highspeed_notify_desc, - &gs_fullspeed_notify_desc) - : NULL; - - ret = usb_ep_enable(dev->dev_in_ep, in); - if (ret == 0) { - dev->dev_in_ep_desc = in; - } else { - pr_debug("%s: cannot enable %s %s, ret=%d\n", - __func__, "IN", dev->dev_in_ep->name, ret); - return ret; - } - - ret = usb_ep_enable(dev->dev_out_ep, out); - if (ret == 0) { - dev->dev_out_ep_desc = out; - } else { - pr_debug("%s: cannot enable %s %s, ret=%d\n", - __func__, "OUT", dev->dev_out_ep->name, ret); -fail0: - usb_ep_disable(dev->dev_in_ep); - return ret; - } - - if (notify) { - ret = usb_ep_enable(dev->dev_notify_ep, notify); - if (ret == 0) { - dev->dev_notify_ep_desc = notify; - } else { - pr_debug("%s: cannot enable %s %s, ret=%d\n", - __func__, "NOTIFY", - dev->dev_notify_ep->name, ret); - usb_ep_disable(dev->dev_out_ep); - goto fail0; - } - } - - dev->dev_config = config; - - /* allocate and queue read requests */ - ep = dev->dev_out_ep; - for (i=0; i<read_q_size && ret == 0; i++) { - if ((req=gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC))) { - req->complete = gs_read_complete; - if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { - pr_err("gs_set_config: cannot queue read " - "request, ret=%d\n", ret); - } - } else { - pr_err("gs_set_config: cannot allocate " - "read requests\n"); - ret = -ENOMEM; - goto exit_reset_config; - } - } - - /* allocate write requests, and put on free list */ - ep = dev->dev_in_ep; - for (i=0; i<write_q_size; i++) { - req = gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC); - if (req) { - req->complete = gs_write_complete; - list_add(&req->list, &dev->dev_req_list); - } else { - pr_err("gs_set_config: cannot allocate " - "write requests\n"); - ret = -ENOMEM; - goto exit_reset_config; - } - } - - /* REVISIT the ACM mode should be able to actually *issue* some - * notifications, for at least serial state change events if - * not also for network connection; say so in bmCapabilities. + /* We *could* export two configs; that'd be much cleaner... + * but neither of these product IDs was defined that way. */ - - pr_info("gs_set_config: %s configured, %s speed %s config\n", - GS_LONG_NAME, - gadget->speed == USB_SPEED_HIGH ? "high" : "full", - config == GS_BULK_CONFIG_ID ? "BULK" : "CDC-ACM"); - - return 0; - -exit_reset_config: - gs_reset_config(dev); - return ret; -} - -/* - * gs_reset_config - * - * Mark the device as not configured, disable all endpoints, - * which forces completion of pending I/O and frees queued - * requests, and free the remaining write requests on the - * free list. - * - * The device lock must be held when calling this function. - */ -static void gs_reset_config(struct gs_dev *dev) -{ - struct usb_request *req; - - if (dev == NULL) { - pr_err("gs_reset_config: NULL device pointer\n"); - return; - } - - if (dev->dev_config == GS_NO_CONFIG_ID) - return; - - dev->dev_config = GS_NO_CONFIG_ID; - - /* free write requests on the free list */ - while(!list_empty(&dev->dev_req_list)) { - req = list_entry(dev->dev_req_list.next, - struct usb_request, list); - list_del(&req->list); - gs_free_req(dev->dev_in_ep, req); - } - - /* disable endpoints, forcing completion of pending i/o; */ - /* completion handlers free their requests in this case */ - if (dev->dev_notify_ep) - usb_ep_disable(dev->dev_notify_ep); - usb_ep_disable(dev->dev_in_ep); - usb_ep_disable(dev->dev_out_ep); -} - -/* - * gs_build_config_buf - * - * Builds the config descriptors in the given buffer and returns the - * length, or a negative error number. - */ -static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, - u8 type, unsigned int index, int is_otg) -{ - int len; - int high_speed = 0; - const struct usb_config_descriptor *config_desc; - const struct usb_descriptor_header **function; - - if (index >= gs_device_desc.bNumConfigurations) - return -EINVAL; - - /* other speed switches high and full speed */ - if (gadget_is_dualspeed(g)) { - high_speed = (g->speed == USB_SPEED_HIGH); - if (type == USB_DT_OTHER_SPEED_CONFIG) - high_speed = !high_speed; - } - if (use_acm) { - config_desc = &gs_acm_config_desc; - function = high_speed - ? gs_acm_highspeed_function - : gs_acm_fullspeed_function; + serial_config_driver.label = "CDC ACM config"; + serial_config_driver.bConfigurationValue = 2; + device_desc.bDeviceClass = USB_CLASS_COMM; + device_desc.idProduct = + __constant_cpu_to_le16(GS_CDC_PRODUCT_ID); } else { - config_desc = &gs_bulk_config_desc; - function = high_speed - ? gs_bulk_highspeed_function - : gs_bulk_fullspeed_function; - } - - /* for now, don't advertise srp-only devices */ - if (!is_otg) - function++; - - len = usb_gadget_config_buf(config_desc, buf, GS_MAX_DESC_LEN, function); - if (len < 0) - return len; - - ((struct usb_config_descriptor *)buf)->bDescriptorType = type; - - return len; -} - -/* - * gs_alloc_req - * - * Allocate a usb_request and its buffer. Returns a pointer to the - * usb_request or NULL if there is an error. - */ -static struct usb_request * -gs_alloc_req(struct usb_ep *ep, unsigned int len, gfp_t kmalloc_flags) -{ - struct usb_request *req; - - if (ep == NULL) - return NULL; - - req = usb_ep_alloc_request(ep, kmalloc_flags); - - if (req != NULL) { - req->length = len; - req->buf = kmalloc(len, kmalloc_flags); - if (req->buf == NULL) { - usb_ep_free_request(ep, req); - return NULL; - } + serial_config_driver.label = "Generic Serial config"; + serial_config_driver.bConfigurationValue = 1; + device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC; + device_desc.idProduct = + __constant_cpu_to_le16(GS_PRODUCT_ID); } + strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label; - return req; + return usb_composite_register(&gserial_driver); } +module_init(init); -/* - * gs_free_req - * - * Free a usb_request and its buffer. - */ -static void gs_free_req(struct usb_ep *ep, struct usb_request *req) +static void __exit cleanup(void) { - if (ep != NULL && req != NULL) { - kfree(req->buf); - usb_ep_free_request(ep, req); - } -} - -/* - * gs_alloc_ports - * - * Allocate all ports and set the gs_dev struct to point to them. - * Return 0 if successful, or a negative error number. - * - * The device lock is normally held when calling this function. - */ -static int gs_alloc_ports(struct gs_dev *dev, gfp_t kmalloc_flags) -{ - int i; - struct gs_port *port; - - if (dev == NULL) - return -EIO; - - for (i=0; i<GS_NUM_PORTS; i++) { - if ((port=kzalloc(sizeof(struct gs_port), kmalloc_flags)) == NULL) - return -ENOMEM; - - port->port_dev = dev; - port->port_num = i; - port->port_line_coding.dwDTERate = cpu_to_le32(GS_DEFAULT_DTE_RATE); - port->port_line_coding.bCharFormat = GS_DEFAULT_CHAR_FORMAT; - port->port_line_coding.bParityType = GS_DEFAULT_PARITY; - port->port_line_coding.bDataBits = GS_DEFAULT_DATA_BITS; - spin_lock_init(&port->port_lock); - init_waitqueue_head(&port->port_write_wait); - - dev->dev_port[i] = port; - } - - return 0; -} - -/* - * gs_free_ports - * - * Free all closed ports. Open ports are disconnected by - * freeing their write buffers, setting their device pointers - * and the pointers to them in the device to NULL. These - * ports will be freed when closed. - * - * The device lock is normally held when calling this function. - */ -static void gs_free_ports(struct gs_dev *dev) -{ - int i; - unsigned long flags; - struct gs_port *port; - - if (dev == NULL) - return; - - for (i=0; i<GS_NUM_PORTS; i++) { - if ((port=dev->dev_port[i]) != NULL) { - dev->dev_port[i] = NULL; - - spin_lock_irqsave(&port->port_lock, flags); - - if (port->port_write_buf != NULL) { - gs_buf_free(port->port_write_buf); - port->port_write_buf = NULL; - } - - if (port->port_open_count > 0 || port->port_in_use) { - port->port_dev = NULL; - wake_up_interruptible(&port->port_write_wait); - if (port->port_tty) { - tty_hangup(port->port_tty); - } - spin_unlock_irqrestore(&port->port_lock, flags); - } else { - spin_unlock_irqrestore(&port->port_lock, flags); - kfree(port); - } - - } - } -} - -/*-------------------------------------------------------------------------*/ - -/* Circular Buffer */ - -/* - * gs_buf_alloc - * - * Allocate a circular buffer and all associated memory. - */ -static struct gs_buf *gs_buf_alloc(unsigned int size, gfp_t kmalloc_flags) -{ - struct gs_buf *gb; - - if (size == 0) - return NULL; - - gb = kmalloc(sizeof(struct gs_buf), kmalloc_flags); - if (gb == NULL) - return NULL; - - gb->buf_buf = kmalloc(size, kmalloc_flags); - if (gb->buf_buf == NULL) { - kfree(gb); - return NULL; - } - - gb->buf_size = size; - gb->buf_get = gb->buf_put = gb->buf_buf; - - return gb; -} - -/* - * gs_buf_free - * - * Free the buffer and all associated memory. - */ -static void gs_buf_free(struct gs_buf *gb) -{ - if (gb) { - kfree(gb->buf_buf); - kfree(gb); - } -} - -/* - * gs_buf_clear - * - * Clear out all data in the circular buffer. - */ -static void gs_buf_clear(struct gs_buf *gb) -{ - if (gb != NULL) - gb->buf_get = gb->buf_put; - /* equivalent to a get of all data available */ -} - -/* - * gs_buf_data_avail - * - * Return the number of bytes of data available in the circular - * buffer. - */ -static unsigned int gs_buf_data_avail(struct gs_buf *gb) -{ - if (gb != NULL) - return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size; - else - return 0; -} - -/* - * gs_buf_space_avail - * - * Return the number of bytes of space available in the circular - * buffer. - */ -static unsigned int gs_buf_space_avail(struct gs_buf *gb) -{ - if (gb != NULL) - return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size; - else - return 0; -} - -/* - * gs_buf_put - * - * Copy data data from a user buffer and put it into the circular buffer. - * Restrict to the amount of space available. - * - * Return the number of bytes copied. - */ -static unsigned int -gs_buf_put(struct gs_buf *gb, const char *buf, unsigned int count) -{ - unsigned int len; - - if (gb == NULL) - return 0; - - len = gs_buf_space_avail(gb); - if (count > len) - count = len; - - if (count == 0) - return 0; - - len = gb->buf_buf + gb->buf_size - gb->buf_put; - if (count > len) { - memcpy(gb->buf_put, buf, len); - memcpy(gb->buf_buf, buf+len, count - len); - gb->buf_put = gb->buf_buf + count - len; - } else { - memcpy(gb->buf_put, buf, count); - if (count < len) - gb->buf_put += count; - else /* count == len */ - gb->buf_put = gb->buf_buf; - } - - return count; -} - -/* - * gs_buf_get - * - * Get data from the circular buffer and copy to the given buffer. - * Restrict to the amount of data available. - * - * Return the number of bytes copied. - */ -static unsigned int -gs_buf_get(struct gs_buf *gb, char *buf, unsigned int count) -{ - unsigned int len; - - if (gb == NULL) - return 0; - - len = gs_buf_data_avail(gb); - if (count > len) - count = len; - - if (count == 0) - return 0; - - len = gb->buf_buf + gb->buf_size - gb->buf_get; - if (count > len) { - memcpy(buf, gb->buf_get, len); - memcpy(buf+len, gb->buf_buf, count - len); - gb->buf_get = gb->buf_buf + count - len; - } else { - memcpy(buf, gb->buf_get, count); - if (count < len) - gb->buf_get += count; - else /* count == len */ - gb->buf_get = gb->buf_buf; - } - - return count; -} - -/*-------------------------------------------------------------------------*/ - -static struct tty_driver *gs_tty_driver; - -/* - * gs_module_init - * - * Register as a USB gadget driver and a tty driver. - */ -static int __init gs_module_init(void) -{ - int i; - int retval; - - retval = usb_gadget_register_driver(&gs_gadget_driver); - if (retval) { - pr_err("gs_module_init: cannot register gadget driver, " - "ret=%d\n", retval); - return retval; - } - - gs_tty_driver = alloc_tty_driver(GS_NUM_PORTS); - if (!gs_tty_driver) - return -ENOMEM; - gs_tty_driver->owner = THIS_MODULE; - gs_tty_driver->driver_name = GS_SHORT_NAME; - gs_tty_driver->name = "ttygs"; - gs_tty_driver->major = GS_MAJOR; - gs_tty_driver->minor_start = GS_MINOR_START; - gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; - gs_tty_driver->subtype = SERIAL_TYPE_NORMAL; - gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - gs_tty_driver->init_termios = tty_std_termios; - /* must match GS_DEFAULT_DTE_RATE and friends */ - gs_tty_driver->init_termios.c_cflag = - B9600 | CS8 | CREAD | HUPCL | CLOCAL; - gs_tty_driver->init_termios.c_ispeed = GS_DEFAULT_DTE_RATE; - gs_tty_driver->init_termios.c_ospeed = GS_DEFAULT_DTE_RATE; - tty_set_operations(gs_tty_driver, &gs_tty_ops); - - for (i = 0; i < GS_NUM_PORTS; i++) - mutex_init(&gs_open_close_lock[i]); - - retval = tty_register_driver(gs_tty_driver); - if (retval) { - usb_gadget_unregister_driver(&gs_gadget_driver); - put_tty_driver(gs_tty_driver); - pr_err("gs_module_init: cannot register tty driver, " - "ret=%d\n", retval); - return retval; - } - - pr_info("gs_module_init: %s %s loaded\n", - GS_LONG_NAME, GS_VERSION_STR); - return 0; -} -module_init(gs_module_init); - -/* - * gs_module_exit - * - * Unregister as a tty driver and a USB gadget driver. - */ -static void __exit gs_module_exit(void) -{ - tty_unregister_driver(gs_tty_driver); - put_tty_driver(gs_tty_driver); - usb_gadget_unregister_driver(&gs_gadget_driver); - - pr_info("gs_module_exit: %s %s unloaded\n", - GS_LONG_NAME, GS_VERSION_STR); + usb_composite_unregister(&gserial_driver); + gserial_cleanup(); } -module_exit(gs_module_exit); +module_exit(cleanup); |