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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * EZ-USB specific functions used by some of the USB to Serial drivers.
4 *
5 * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
6 */
7
8#include <linux/kernel.h>
9#include <linux/slab.h>
10#include <linux/module.h>
11#include <linux/usb.h>
12#include <linux/firmware.h>
13#include <linux/ihex.h>
14#include <linux/usb/ezusb.h>
15
16struct ezusb_fx_type {
17 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
18 unsigned short cpucs_reg;
19 unsigned short max_internal_adress;
20};
21
22static const struct ezusb_fx_type ezusb_fx1 = {
23 .cpucs_reg = 0x7F92,
24 .max_internal_adress = 0x1B3F,
25};
26
27/* Commands for writing to memory */
28#define WRITE_INT_RAM 0xA0
29#define WRITE_EXT_RAM 0xA3
30
31static int ezusb_writememory(struct usb_device *dev, int address,
32 unsigned char *data, int length, __u8 request)
33{
34 int result;
35 unsigned char *transfer_buffer;
36
37 if (!dev)
38 return -ENODEV;
39
40 transfer_buffer = kmemdup(data, length, GFP_KERNEL);
41 if (!transfer_buffer) {
42 dev_err(&dev->dev, "%s - kmalloc(%d) failed.\n",
43 __func__, length);
44 return -ENOMEM;
45 }
46 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
47 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
48 address, 0, transfer_buffer, length, 3000);
49
50 kfree(transfer_buffer);
51 return result;
52}
53
54static int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg,
55 unsigned char reset_bit)
56{
57 int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM);
58 if (response < 0)
59 dev_err(&dev->dev, "%s-%d failed: %d\n",
60 __func__, reset_bit, response);
61 return response;
62}
63
64int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit)
65{
66 return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit);
67}
68EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset);
69
70static int ezusb_ihex_firmware_download(struct usb_device *dev,
71 struct ezusb_fx_type fx,
72 const char *firmware_path)
73{
74 int ret = -ENOENT;
75 const struct firmware *firmware = NULL;
76 const struct ihex_binrec *record;
77
78 if (request_ihex_firmware(&firmware, firmware_path,
79 &dev->dev)) {
80 dev_err(&dev->dev,
81 "%s - request \"%s\" failed\n",
82 __func__, firmware_path);
83 goto out;
84 }
85
86 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
87 if (ret < 0)
88 goto out;
89
90 record = (const struct ihex_binrec *)firmware->data;
91 for (; record; record = ihex_next_binrec(record)) {
92 if (be32_to_cpu(record->addr) > fx.max_internal_adress) {
93 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
94 (unsigned char *)record->data,
95 be16_to_cpu(record->len), WRITE_EXT_RAM);
96 if (ret < 0) {
97 dev_err(&dev->dev, "%s - ezusb_writememory "
98 "failed writing internal memory "
99 "(%d %04X %p %d)\n", __func__, ret,
100 be32_to_cpu(record->addr), record->data,
101 be16_to_cpu(record->len));
102 goto out;
103 }
104 }
105 }
106
107 ret = ezusb_set_reset(dev, fx.cpucs_reg, 1);
108 if (ret < 0)
109 goto out;
110 record = (const struct ihex_binrec *)firmware->data;
111 for (; record; record = ihex_next_binrec(record)) {
112 if (be32_to_cpu(record->addr) <= fx.max_internal_adress) {
113 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
114 (unsigned char *)record->data,
115 be16_to_cpu(record->len), WRITE_INT_RAM);
116 if (ret < 0) {
117 dev_err(&dev->dev, "%s - ezusb_writememory "
118 "failed writing external memory "
119 "(%d %04X %p %d)\n", __func__, ret,
120 be32_to_cpu(record->addr), record->data,
121 be16_to_cpu(record->len));
122 goto out;
123 }
124 }
125 }
126 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
127out:
128 release_firmware(firmware);
129 return ret;
130}
131
132int ezusb_fx1_ihex_firmware_download(struct usb_device *dev,
133 const char *firmware_path)
134{
135 return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path);
136}
137EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download);
138
139#if 0
140/*
141 * Once someone one needs these fx2 functions, uncomment them
142 * and add them to ezusb.h and all should be good.
143 */
144static struct ezusb_fx_type ezusb_fx2 = {
145 .cpucs_reg = 0xE600,
146 .max_internal_adress = 0x3FFF,
147};
148
149int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit)
150{
151 return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit);
152}
153EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset);
154
155int ezusb_fx2_ihex_firmware_download(struct usb_device *dev,
156 const char *firmware_path)
157{
158 return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path);
159}
160EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download);
161#endif
162
163MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * EZ-USB specific functions used by some of the USB to Serial drivers.
4 *
5 * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
6 */
7
8#include <linux/kernel.h>
9#include <linux/slab.h>
10#include <linux/module.h>
11#include <linux/usb.h>
12#include <linux/firmware.h>
13#include <linux/ihex.h>
14#include <linux/usb/ezusb.h>
15
16struct ezusb_fx_type {
17 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
18 unsigned short cpucs_reg;
19 unsigned short max_internal_adress;
20};
21
22static const struct ezusb_fx_type ezusb_fx1 = {
23 .cpucs_reg = 0x7F92,
24 .max_internal_adress = 0x1B3F,
25};
26
27/* Commands for writing to memory */
28#define WRITE_INT_RAM 0xA0
29#define WRITE_EXT_RAM 0xA3
30
31static int ezusb_writememory(struct usb_device *dev, int address,
32 unsigned char *data, int length, __u8 request)
33{
34 if (!dev)
35 return -ENODEV;
36
37 return usb_control_msg_send(dev, 0, request,
38 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
39 address, 0, data, length, 3000, GFP_KERNEL);
40}
41
42static int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg,
43 unsigned char reset_bit)
44{
45 int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM);
46 if (response < 0)
47 dev_err(&dev->dev, "%s-%d failed: %d\n",
48 __func__, reset_bit, response);
49 return response;
50}
51
52int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit)
53{
54 return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit);
55}
56EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset);
57
58static int ezusb_ihex_firmware_download(struct usb_device *dev,
59 struct ezusb_fx_type fx,
60 const char *firmware_path)
61{
62 int ret = -ENOENT;
63 const struct firmware *firmware = NULL;
64 const struct ihex_binrec *record;
65
66 if (request_ihex_firmware(&firmware, firmware_path,
67 &dev->dev)) {
68 dev_err(&dev->dev,
69 "%s - request \"%s\" failed\n",
70 __func__, firmware_path);
71 goto out;
72 }
73
74 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
75 if (ret < 0)
76 goto out;
77
78 record = (const struct ihex_binrec *)firmware->data;
79 for (; record; record = ihex_next_binrec(record)) {
80 if (be32_to_cpu(record->addr) > fx.max_internal_adress) {
81 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
82 (unsigned char *)record->data,
83 be16_to_cpu(record->len), WRITE_EXT_RAM);
84 if (ret < 0) {
85 dev_err(&dev->dev, "%s - ezusb_writememory "
86 "failed writing internal memory "
87 "(%d %04X %p %d)\n", __func__, ret,
88 be32_to_cpu(record->addr), record->data,
89 be16_to_cpu(record->len));
90 goto out;
91 }
92 }
93 }
94
95 ret = ezusb_set_reset(dev, fx.cpucs_reg, 1);
96 if (ret < 0)
97 goto out;
98 record = (const struct ihex_binrec *)firmware->data;
99 for (; record; record = ihex_next_binrec(record)) {
100 if (be32_to_cpu(record->addr) <= fx.max_internal_adress) {
101 ret = ezusb_writememory(dev, be32_to_cpu(record->addr),
102 (unsigned char *)record->data,
103 be16_to_cpu(record->len), WRITE_INT_RAM);
104 if (ret < 0) {
105 dev_err(&dev->dev, "%s - ezusb_writememory "
106 "failed writing external memory "
107 "(%d %04X %p %d)\n", __func__, ret,
108 be32_to_cpu(record->addr), record->data,
109 be16_to_cpu(record->len));
110 goto out;
111 }
112 }
113 }
114 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0);
115out:
116 release_firmware(firmware);
117 return ret;
118}
119
120int ezusb_fx1_ihex_firmware_download(struct usb_device *dev,
121 const char *firmware_path)
122{
123 return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path);
124}
125EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download);
126
127#if 0
128/*
129 * Once someone one needs these fx2 functions, uncomment them
130 * and add them to ezusb.h and all should be good.
131 */
132static struct ezusb_fx_type ezusb_fx2 = {
133 .cpucs_reg = 0xE600,
134 .max_internal_adress = 0x3FFF,
135};
136
137int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit)
138{
139 return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit);
140}
141EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset);
142
143int ezusb_fx2_ihex_firmware_download(struct usb_device *dev,
144 const char *firmware_path)
145{
146 return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path);
147}
148EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download);
149#endif
150
151MODULE_LICENSE("GPL");