projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * EZ-USB specific functions used by some of the USB to Serial drivers. | |
| 3 | * | |
| 4 | * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License version | |
| 8 | * 2 as published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 1da177e4 LT |
11 | #include <linux/kernel.h> |
| 12 | #include <linux/errno.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/slab.h> | |
| 15 | #include <linux/tty.h> | |
| 16 | #include <linux/module.h> | |
| 17 | #include <linux/usb.h> | |
| a969888c | 18 | #include <linux/usb/serial.h> |
| 1da177e4 LT |
19 | |
| 20 | /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ | |
| 21 | #define CPUCS_REG 0x7F92 | |
| 22 | ||
| 23 | int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest) | |
| 24 | { | |
| 25 | int result; | |
| 26 | unsigned char *transfer_buffer; | |
| 27 | ||
| 28 | /* dbg("ezusb_writememory %x, %d", address, length); */ | |
| 29 | if (!serial->dev) { | |
| 30 | err("%s - no physical device present, failing.", __FUNCTION__); | |
| 31 | return -ENODEV; | |
| 32 | } | |
| 33 | ||
| 34 | transfer_buffer = kmalloc (length, GFP_KERNEL); | |
| 35 | if (!transfer_buffer) { | |
| 36 | dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, length); | |
| 37 | return -ENOMEM; | |
| 38 | } | |
| 39 | memcpy (transfer_buffer, data, length); | |
| 40 | result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), bRequest, 0x40, address, 0, transfer_buffer, length, 3000); | |
| 41 | kfree (transfer_buffer); | |
| 42 | return result; | |
| 43 | } | |
| 44 | ||
| 45 | int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit) | |
| 46 | { | |
| 47 | int response; | |
| 48 | ||
| 49 | /* dbg("%s - %d", __FUNCTION__, reset_bit); */ | |
| 50 | response = ezusb_writememory (serial, CPUCS_REG, &reset_bit, 1, 0xa0); | |
| 51 | if (response < 0) | |
| 52 | dev_err(&serial->dev->dev, "%s- %d failed\n", __FUNCTION__, reset_bit); | |
| 53 | return response; | |
| 54 | } | |
| 55 | ||
| 56 | ||
| 57 | EXPORT_SYMBOL(ezusb_writememory); | |
| 58 | EXPORT_SYMBOL(ezusb_set_reset); | |
| 59 |