2 * EZ-USB specific functions used by some of the USB to Serial drivers.
4 * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
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.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <linux/usb.h>
16 #include <linux/firmware.h>
17 #include <linux/ihex.h>
19 struct ezusb_fx_type {
20 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
21 unsigned short cpucs_reg;
22 unsigned short max_internal_adress;
25 struct ezusb_fx_type ezusb_fx1 = {
27 .max_internal_adress = 0x1B3F,
30 struct ezusb_fx_type ezusb_fx2 = {
32 .max_internal_adress = 0x3FFF,
35 /* Commands for writing to memory */
36 #define WRITE_INT_RAM 0xA0
37 #define WRITE_EXT_RAM 0xA3
39 int ezusb_writememory(struct usb_device *dev, int address,
40 unsigned char *data, int length, __u8 request)
43 unsigned char *transfer_buffer;
48 transfer_buffer = kmemdup(data, length, GFP_KERNEL);
49 if (!transfer_buffer) {
50 dev_err(&dev->dev, "%s - kmalloc(%d) failed.\n",
54 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
55 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
56 address, 0, transfer_buffer, length, 3000);
58 kfree(transfer_buffer);
61 EXPORT_SYMBOL_GPL(ezusb_writememory);
63 int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg,
64 unsigned char reset_bit)
66 int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM);
68 dev_err(&dev->dev, "%s-%d failed: %d\n",
69 __func__, reset_bit, response);
73 int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit)
75 return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit);
77 EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset);
79 int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit)
81 return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit);
83 EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset);
85 static int ezusb_ihex_firmware_download(struct usb_device *dev,
86 struct ezusb_fx_type fx,
87 const char *firmware_path)
90 const struct firmware *firmware = NULL;
91 const struct ihex_binrec *record;
93 if (request_ihex_firmware(&firmware, firmware_path,
96 "%s - request \"%s\" failed\n",
97 __func__, firmware_path);
101 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
105 record = (const struct ihex_binrec *)firmware->data;
106 for (; record; record = ihex_next_binrec(record)) {
107 if (be32_to_cpu(record->addr) > fx.max_internal_adress) {
108 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
109 (unsigned char *)record->data,
110 be16_to_cpu(record->len), WRITE_EXT_RAM);
112 dev_err(&dev->dev, "%s - ezusb_writememory "
113 "failed writing internal memory "
114 "(%d %04X %p %d)\n", __func__, ret,
115 be32_to_cpu(record->addr), record->data,
116 be16_to_cpu(record->len));
122 ret = ezusb_set_reset(dev, fx.cpucs_reg, 1);
125 record = (const struct ihex_binrec *)firmware->data;
126 for (; record; record = ihex_next_binrec(record)) {
127 if (be32_to_cpu(record->addr) <= fx.max_internal_adress) {
128 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
129 (unsigned char *)record->data,
130 be16_to_cpu(record->len), WRITE_INT_RAM);
132 dev_err(&dev->dev, "%s - ezusb_writememory "
133 "failed writing external memory "
134 "(%d %04X %p %d)\n", __func__, ret,
135 be32_to_cpu(record->addr), record->data,
136 be16_to_cpu(record->len));
141 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
143 release_firmware(firmware);
147 int ezusb_fx1_ihex_firmware_download(struct usb_device *dev,
148 const char *firmware_path)
150 return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path);
152 EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download);
154 int ezusb_fx2_ihex_firmware_download(struct usb_device *dev,
155 const char *firmware_path)
157 return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path);
159 EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download);