Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/init.h> |
| 13 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/usb.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 17 | struct ezusb_fx_type { |
| 18 | /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ |
| 19 | unsigned short cpucs_reg; |
| 20 | unsigned short max_internal_adress; |
| 21 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 23 | struct ezusb_fx_type ezusb_fx1 = { |
| 24 | .cpucs_reg = 0x7F92, |
| 25 | .max_internal_adress = 0x1B3F, |
| 26 | }; |
| 27 | |
| 28 | struct ezusb_fx_type ezusb_fx2 = { |
| 29 | .cpucs_reg = 0xE600, |
| 30 | .max_internal_adress = 0x3FFF, |
| 31 | }; |
| 32 | |
| 33 | /* Commands for writing to memory */ |
Rene Buergel | 99495c7 | 2012-09-13 22:14:38 +0200 | [diff] [blame] | 34 | #define WRITE_INT_RAM 0xA0 |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 35 | #define WRITE_EXT_RAM 0xA3 |
Rene Buergel | 99495c7 | 2012-09-13 22:14:38 +0200 | [diff] [blame] | 36 | |
| 37 | int ezusb_writememory(struct usb_device *dev, int address, |
Alan Cox | 80359a9 | 2008-07-22 11:09:16 +0100 | [diff] [blame] | 38 | unsigned char *data, int length, __u8 request) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | int result; |
| 41 | unsigned char *transfer_buffer; |
| 42 | |
Greg Kroah-Hartman | c6ab015 | 2012-09-18 16:55:48 +0100 | [diff] [blame] | 43 | if (!dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Eric Sesterhenn | 5d7efe5 | 2006-10-26 21:06:24 +0200 | [diff] [blame] | 46 | transfer_buffer = kmemdup(data, length, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | if (!transfer_buffer) { |
Rene Buergel | 99495c7 | 2012-09-13 22:14:38 +0200 | [diff] [blame] | 48 | dev_err(&dev->dev, "%s - kmalloc(%d) failed.\n", |
Alan Cox | 80359a9 | 2008-07-22 11:09:16 +0100 | [diff] [blame] | 49 | __func__, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | return -ENOMEM; |
| 51 | } |
Rene Buergel | 99495c7 | 2012-09-13 22:14:38 +0200 | [diff] [blame] | 52 | result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, |
| 53 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 54 | address, 0, transfer_buffer, length, 3000); |
| 55 | |
Alan Cox | 80359a9 | 2008-07-22 11:09:16 +0100 | [diff] [blame] | 56 | kfree(transfer_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | return result; |
| 58 | } |
Alan Cox | 80359a9 | 2008-07-22 11:09:16 +0100 | [diff] [blame] | 59 | EXPORT_SYMBOL_GPL(ezusb_writememory); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 61 | int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg, |
| 62 | unsigned char reset_bit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 64 | int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | if (response < 0) |
Rene Buergel | 99495c7 | 2012-09-13 22:14:38 +0200 | [diff] [blame] | 66 | dev_err(&dev->dev, "%s-%d failed: %d\n", |
| 67 | __func__, reset_bit, response); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | return response; |
| 69 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Rene Buergel | cc183e2 | 2012-09-18 09:00:41 +0200 | [diff] [blame^] | 71 | int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit) |
| 72 | { |
| 73 | return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit); |
| 74 | } |
| 75 | EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset); |
| 76 | |
| 77 | int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit) |
| 78 | { |
| 79 | return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit); |
| 80 | } |
| 81 | EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset); |