e3054bbd9b97490ba21fbae279157c40b5f56691
[bertos.git] / bertos / drv / usb_serial.c
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32  *
33  * \author Andrea Righi <arighi@develer.com>
34  *
35  * \brief Generic USB serial device driver.
36  *
37  */
38
39 #include "cfg/cfg_usb_serial.h"
40
41 #define LOG_LEVEL  USB_SERIAL_LOG_LEVEL
42 #define LOG_FORMAT USB_SERIAL_LOG_FORMAT
43
44 #include <cfg/log.h>
45 #include <cfg/debug.h>
46 #include <cfg/macros.h>
47
48 #include <cfg/compiler.h>
49 #include <cfg/module.h>
50
51 #include <cpu/irq.h> /* IRQ_DISABLE / IRQ_ENABLE */
52 #include <cpu/power.h> /* cpu_relax() */
53
54 #include <drv/usb.h>
55
56 #include <string.h> /* memcpy() */
57
58 #include "drv/usb_serial.h"
59
60 #define USB_SERIAL_VENDOR_ID    0x05f9
61 #define USB_SERIAL_PRODUCT_ID   0xffff
62
63 #define USB_SERIAL_INTERFACES   1
64 #define USB_SERIAL_ENDPOINTS    3
65
66 #define USB_STRING_MANUFACTURER 1
67 #define USB_STRING_PRODUCT      2
68 #define USB_STRING_SERIAL       3
69
70 static usb_device_descriptor_t usb_serial_device_descriptor =
71 {
72         .bLength = sizeof(usb_serial_device_descriptor),
73         .bDescriptorType = USB_DT_DEVICE,
74         .bcdUSB = 0x110,
75         .bDeviceClass = USB_CLASS_COMM,
76         .bDeviceSubClass = 0,
77         .bDeviceProtocol = 0,
78         .idVendor = USB_SERIAL_VENDOR_ID,
79         .idProduct = USB_SERIAL_PRODUCT_ID,
80         .bcdDevice = 0,
81         .iManufacturer = USB_STRING_MANUFACTURER,
82         .iProduct = USB_STRING_PRODUCT,
83         .iSerialNumber = USB_STRING_SERIAL,
84         .bNumConfigurations = 1,
85 };
86
87 static usb_config_descriptor_t usb_serial_config_descriptor =
88 {
89         .bLength = sizeof(usb_serial_config_descriptor),
90         .bDescriptorType = USB_DT_CONFIG,
91         .bNumInterfaces = USB_SERIAL_INTERFACES,
92         .bConfigurationValue = 1,
93         .iConfiguration = 0,
94         .bmAttributes = USB_CONFIG_ATT_ONE,
95         .bMaxPower = 50, /* 100 mA */
96 };
97
98 static usb_interface_descriptor_t usb_serial_interface_descriptor =
99 {
100         .bLength = sizeof(usb_serial_interface_descriptor),
101         .bDescriptorType = USB_DT_INTERFACE,
102         .bInterfaceNumber = 0,
103         .bAlternateSetting = 0,
104         .bNumEndpoints = USB_SERIAL_ENDPOINTS,
105         .bInterfaceClass = 0xff,
106         .bInterfaceSubClass = 0,
107         .bInterfaceProtocol = 0,
108         .iInterface = 0,
109 };
110
111 static usb_endpoint_descriptor_t usb_serial_ep_report_descriptor =
112 {
113         .bLength = sizeof(usb_serial_ep_report_descriptor),
114         .bDescriptorType = USB_DT_ENDPOINT,
115         .bEndpointAddress = USB_DIR_IN | 1,
116         .bmAttributes = USB_ENDPOINT_XFER_INT,
117         .wMaxPacketSize = usb_cpu_to_le16(8),
118         .bInterval = 1,
119 };
120
121 static usb_endpoint_descriptor_t usb_serial_ep_in_descriptor =
122 {
123         .bLength = sizeof(usb_serial_ep_in_descriptor),
124         .bDescriptorType = USB_DT_ENDPOINT,
125         .bEndpointAddress = USB_DIR_IN | 3,
126         .bmAttributes = USB_ENDPOINT_XFER_BULK,
127         .wMaxPacketSize = usb_cpu_to_le16(64),
128         .bInterval = 0,
129 };
130
131 static usb_endpoint_descriptor_t usb_serial_ep_out_descriptor =
132 {
133         .bLength = sizeof(usb_serial_ep_in_descriptor),
134         .bDescriptorType = USB_DT_ENDPOINT,
135         .bEndpointAddress = USB_DIR_OUT | 2,
136         .bmAttributes = USB_ENDPOINT_XFER_BULK,
137         .wMaxPacketSize = usb_cpu_to_le16(64),
138         .bInterval = 0,
139 };
140
141 static usb_descriptor_header_t *usb_serial_config[] =
142 {
143         (usb_descriptor_header_t *)&usb_serial_config_descriptor,
144         (usb_descriptor_header_t *)&usb_serial_interface_descriptor,
145         (usb_descriptor_header_t *)&usb_serial_ep_report_descriptor,
146         (usb_descriptor_header_t *)&usb_serial_ep_in_descriptor,
147         (usb_descriptor_header_t *)&usb_serial_ep_out_descriptor,
148         NULL,
149 };
150
151 static DEFINE_USB_STRING(language_str, "\x09\x04"); // Language ID: en_US
152 static DEFINE_USB_STRING(manufacturer_str,
153                         USB_STRING("B", "e", "R", "T", "O", "S"));
154 static DEFINE_USB_STRING(product_str,
155                         USB_STRING("U", "S", "B", "-", "s", "e", "r", "i", "a", "l"));
156 static DEFINE_USB_STRING(serial_str,
157                         USB_STRING("0", "0", "1"));
158
159 static usb_string_descriptor_t *usb_serial_strings[] =
160 {
161         (usb_string_descriptor_t *)&language_str,
162         (usb_string_descriptor_t *)&manufacturer_str,
163         (usb_string_descriptor_t *)&product_str,
164         (usb_string_descriptor_t *)&serial_str,
165         NULL,
166 };
167
168 static struct usb_device usb_serial = {
169         .device = &usb_serial_device_descriptor,
170         .config = usb_serial_config,
171         .strings = usb_serial_strings,
172 };
173
174 ssize_t usb_serial_read(void *buffer, ssize_t size)
175 {
176         return usb_ep_read(usb_serial_ep_out_descriptor.bEndpointAddress,
177                                 buffer, size);
178 }
179
180 ssize_t usb_serial_write(const void *buffer, ssize_t size)
181 {
182         return usb_ep_write(usb_serial_ep_in_descriptor.bEndpointAddress,
183                                 buffer, size);
184 }
185
186 int usb_serial_init(void)
187 {
188 #if CONFIG_KERN
189         MOD_CHECK(proc);
190 #endif
191         if (usb_device_register(&usb_serial) < 0)
192                 return -1;
193         LOG_INFO("usb-serial: registered new USB interface driver\n");
194         return 0;
195 }