diff options
Diffstat (limited to 'drivers/usb/serial/baseband_usb_chr.h')
| -rw-r--r-- | drivers/usb/serial/baseband_usb_chr.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/usb/serial/baseband_usb_chr.h b/drivers/usb/serial/baseband_usb_chr.h new file mode 100644 index 000000000000..7935e795a54d --- /dev/null +++ b/drivers/usb/serial/baseband_usb_chr.h @@ -0,0 +1,106 @@ +/* + * baseband_usb_chr.h + * + * USB character driver to communicate with baseband modems. + * + * Copyright (c) 2011, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __BASEBAND_USB_CHR_H__ +#define __BASEBAND_USB_CHR_H__ + +#define BASEBAND_USB_CHR_DEV_NAME "baseband_usb_chr" +#define BASEBAND_USB_CHR_DEV_MAJOR 66 + +#ifndef USB_CHR_RX_BUFSIZ +#define USB_CHR_RX_BUFSIZ (128*1024) +#endif /* USB_CHR_RX_BUFSIZ */ + +#ifndef USB_CHR_TX_BUFSIZ +#define USB_CHR_TX_BUFSIZ (128*1024) +#endif /* USB_CHR_TX_BUFSIZ */ + +#ifndef USB_CHR_TIMEOUT +#define USB_CHR_TIMEOUT 5000 /* ms */ +#endif /* USB_CHR_TIMEOUT */ + +#ifndef BASEBAND_IPC_NUM_RX_BUF +#define BASEBAND_IPC_NUM_RX_BUF 32 +#endif /* BASEBAND_IPC_NUM_RX_BUF */ + +#ifndef BASEBAND_IPC_NUM_TX_BUF +#define BASEBAND_IPC_NUM_TX_BUF 16 +#endif /* BASEBAND_IPC_NUM_TX_BUF */ + +#ifndef BASEBAND_IPC_BUFSIZ +#define BASEBAND_IPC_BUFSIZ 65536 +#endif /* BASEBAND_IPC_BUFSIZ */ + +struct baseband_ipc { + /* rx / tx data */ + struct semaphore buf_sem; + struct { + /* linked list of data buffers */ + struct list_head buf; + /* wait queue of processes trying to access data buffers */ + wait_queue_head_t wait; + } rx, tx, rx_free, tx_free; + unsigned char *ipc_rx; + unsigned char *ipc_tx; + /* work queue + * - queued per ipc transaction + * - initiated by either: + * = interrupt on gpio line (rx data available) + * = tx data packet being added to tx linked list + */ + struct workqueue_struct *workqueue; + struct work_struct work; + struct work_struct rx_work; + struct work_struct tx_work; +}; + +struct baseband_ipc_buf { + struct list_head list; + /* data buffer */ + unsigned char data[BASEBAND_IPC_BUFSIZ]; + /* offset of first data byte */ + size_t offset; + /* number of valid data bytes */ + size_t count; +}; + +struct baseband_usb { + struct baseband_ipc *ipc; + struct { + struct usb_driver *driver; + struct usb_device *device; + struct usb_interface *interface; + struct { + struct { + unsigned int in; + unsigned int out; + } isoch, bulk, interrupt; + } pipe; + /* currently active rx urb */ + struct urb *rx_urb; + /* currently active tx urb */ + struct urb *tx_urb; + } usb; +}; + +#endif /* __BASEBAND_USB_CHR_H__ */ + |