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Commit | Line | Data |
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43d186fe | 1 | /* |
d4cbd6e9 GKH |
2 | Some of this code is credited to Linux USB open source files that are |
3 | distributed with Linux. | |
43d186fe AB |
4 | |
5 | Copyright: 2007 Metrologic Instruments. All rights reserved. | |
6 | Copyright: 2011 Azimut Ltd. <http://azimutrzn.ru/> | |
43d186fe AB |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
43d186fe AB |
10 | #include <linux/tty.h> |
11 | #include <linux/module.h> | |
12 | #include <linux/usb.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/tty_driver.h> | |
16 | #include <linux/tty_flip.h> | |
17 | #include <linux/moduleparam.h> | |
18 | #include <linux/spinlock.h> | |
d4cbd6e9 | 19 | #include <linux/uaccess.h> |
43d186fe AB |
20 | #include <linux/usb/serial.h> |
21 | ||
43d186fe AB |
22 | #define DRIVER_DESC "Metrologic Instruments Inc. - USB-POS driver" |
23 | ||
159d4d8d GKH |
24 | /* Product information. */ |
25 | #define FOCUS_VENDOR_ID 0x0C2E | |
810ec78e AB |
26 | #define FOCUS_PRODUCT_ID_BI 0x0720 |
27 | #define FOCUS_PRODUCT_ID_UNI 0x0700 | |
159d4d8d GKH |
28 | |
29 | #define METROUSB_SET_REQUEST_TYPE 0x40 | |
30 | #define METROUSB_SET_MODEM_CTRL_REQUEST 10 | |
31 | #define METROUSB_SET_BREAK_REQUEST 0x40 | |
32 | #define METROUSB_MCR_NONE 0x08 /* Deactivate DTR and RTS. */ | |
33 | #define METROUSB_MCR_RTS 0x0a /* Activate RTS. */ | |
34 | #define METROUSB_MCR_DTR 0x09 /* Activate DTR. */ | |
d4cbd6e9 | 35 | #define WDR_TIMEOUT 5000 /* default urb timeout. */ |
159d4d8d GKH |
36 | |
37 | /* Private data structure. */ | |
38 | struct metrousb_private { | |
39 | spinlock_t lock; | |
40 | int throttled; | |
41 | unsigned long control_state; | |
42 | }; | |
43 | ||
43d186fe | 44 | /* Device table list. */ |
5c6b98dd | 45 | static const struct usb_device_id id_table[] = { |
810ec78e | 46 | { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID_BI) }, |
43d186fe | 47 | { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID_UNI) }, |
de03bbe0 | 48 | { USB_DEVICE_INTERFACE_CLASS(0x0c2e, 0x0730, 0xff) }, /* MS7820 */ |
43d186fe AB |
49 | { }, /* Terminating entry. */ |
50 | }; | |
51 | MODULE_DEVICE_TABLE(usb, id_table); | |
52 | ||
70457786 AB |
53 | /* UNI-Directional mode commands for device configure */ |
54 | #define UNI_CMD_OPEN 0x80 | |
55 | #define UNI_CMD_CLOSE 0xFF | |
56 | ||
8f24c490 | 57 | static inline int metrousb_is_unidirectional_mode(struct usb_serial_port *port) |
70457786 AB |
58 | { |
59 | __u16 product_id = le16_to_cpu( | |
60 | port->serial->dev->descriptor.idProduct); | |
61 | ||
62 | return product_id == FOCUS_PRODUCT_ID_UNI; | |
63 | } | |
64 | ||
65 | static int metrousb_send_unidirectional_cmd(u8 cmd, struct usb_serial_port *port) | |
66 | { | |
67 | int ret; | |
68 | int actual_len; | |
69 | u8 *buffer_cmd = NULL; | |
70 | ||
71 | if (!metrousb_is_unidirectional_mode(port)) | |
72 | return 0; | |
73 | ||
74 | buffer_cmd = kzalloc(sizeof(cmd), GFP_KERNEL); | |
75 | if (!buffer_cmd) | |
76 | return -ENOMEM; | |
77 | ||
78 | *buffer_cmd = cmd; | |
79 | ||
80 | ret = usb_interrupt_msg(port->serial->dev, | |
81 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
82 | buffer_cmd, sizeof(cmd), | |
83 | &actual_len, USB_CTRL_SET_TIMEOUT); | |
84 | ||
85 | kfree(buffer_cmd); | |
86 | ||
87 | if (ret < 0) | |
88 | return ret; | |
89 | else if (actual_len != sizeof(cmd)) | |
90 | return -EIO; | |
91 | return 0; | |
92 | } | |
93 | ||
9fbd1649 | 94 | static void metrousb_read_int_callback(struct urb *urb) |
43d186fe | 95 | { |
8111e4ec | 96 | struct usb_serial_port *port = urb->context; |
9fbd1649 | 97 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); |
9fbd1649 GKH |
98 | unsigned char *data = urb->transfer_buffer; |
99 | int throttled = 0; | |
100 | int result = 0; | |
101 | unsigned long flags = 0; | |
102 | ||
5db51b50 | 103 | dev_dbg(&port->dev, "%s\n", __func__); |
43d186fe | 104 | |
9fbd1649 GKH |
105 | switch (urb->status) { |
106 | case 0: | |
107 | /* Success status, read from the port. */ | |
108 | break; | |
109 | case -ECONNRESET: | |
110 | case -ENOENT: | |
111 | case -ESHUTDOWN: | |
112 | /* urb has been terminated. */ | |
5db51b50 GKH |
113 | dev_dbg(&port->dev, |
114 | "%s - urb shutting down, error code=%d\n", | |
bd2c09bc | 115 | __func__, urb->status); |
9fbd1649 GKH |
116 | return; |
117 | default: | |
5db51b50 GKH |
118 | dev_dbg(&port->dev, |
119 | "%s - non-zero urb received, error code=%d\n", | |
bd2c09bc | 120 | __func__, urb->status); |
9fbd1649 GKH |
121 | goto exit; |
122 | } | |
123 | ||
124 | ||
125 | /* Set the data read from the usb port into the serial port buffer. */ | |
2e124b4a | 126 | if (urb->actual_length) { |
9fbd1649 | 127 | /* Loop through the data copying each byte to the tty layer. */ |
05c7cd39 | 128 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
9fbd1649 GKH |
129 | |
130 | /* Force the data to the tty layer. */ | |
2e124b4a | 131 | tty_flip_buffer_push(&port->port); |
9fbd1649 | 132 | } |
9fbd1649 GKH |
133 | |
134 | /* Set any port variables. */ | |
135 | spin_lock_irqsave(&metro_priv->lock, flags); | |
136 | throttled = metro_priv->throttled; | |
137 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
138 | ||
acfe2763 JH |
139 | if (throttled) |
140 | return; | |
9fbd1649 GKH |
141 | exit: |
142 | /* Try to resubmit the urb. */ | |
143 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
5db51b50 | 144 | if (result) |
91fbecfe | 145 | dev_err(&port->dev, |
5db51b50 GKH |
146 | "%s - failed submitting interrupt in urb, error code=%d\n", |
147 | __func__, result); | |
43d186fe AB |
148 | } |
149 | ||
9fbd1649 | 150 | static void metrousb_cleanup(struct usb_serial_port *port) |
43d186fe | 151 | { |
2ee44fbe JH |
152 | usb_kill_urb(port->interrupt_in_urb); |
153 | ||
5813f281 | 154 | metrousb_send_unidirectional_cmd(UNI_CMD_CLOSE, port); |
43d186fe AB |
155 | } |
156 | ||
d4cbd6e9 | 157 | static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) |
43d186fe AB |
158 | { |
159 | struct usb_serial *serial = port->serial; | |
160 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); | |
161 | unsigned long flags = 0; | |
162 | int result = 0; | |
163 | ||
43d186fe AB |
164 | /* Make sure the urb is initialized. */ |
165 | if (!port->interrupt_in_urb) { | |
91fbecfe | 166 | dev_err(&port->dev, "%s - interrupt urb not initialized\n", |
5db51b50 | 167 | __func__); |
43d186fe AB |
168 | return -ENODEV; |
169 | } | |
170 | ||
171 | /* Set the private data information for the port. */ | |
172 | spin_lock_irqsave(&metro_priv->lock, flags); | |
173 | metro_priv->control_state = 0; | |
174 | metro_priv->throttled = 0; | |
175 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
176 | ||
43d186fe AB |
177 | /* Clear the urb pipe. */ |
178 | usb_clear_halt(serial->dev, port->interrupt_in_urb->pipe); | |
179 | ||
180 | /* Start reading from the device */ | |
d4cbd6e9 GKH |
181 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, |
182 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
43d186fe AB |
183 | port->interrupt_in_urb->transfer_buffer, |
184 | port->interrupt_in_urb->transfer_buffer_length, | |
185 | metrousb_read_int_callback, port, 1); | |
186 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
187 | ||
188 | if (result) { | |
91fbecfe | 189 | dev_err(&port->dev, |
5db51b50 GKH |
190 | "%s - failed submitting interrupt in urb, error code=%d\n", |
191 | __func__, result); | |
5d7e6b00 | 192 | return result; |
43d186fe AB |
193 | } |
194 | ||
70457786 AB |
195 | /* Send activate cmd to device */ |
196 | result = metrousb_send_unidirectional_cmd(UNI_CMD_OPEN, port); | |
197 | if (result) { | |
198 | dev_err(&port->dev, | |
1143832e GKH |
199 | "%s - failed to configure device, error code=%d\n", |
200 | __func__, result); | |
5d7e6b00 | 201 | goto err_kill_urb; |
70457786 | 202 | } |
5d7e6b00 JH |
203 | |
204 | return 0; | |
205 | ||
206 | err_kill_urb: | |
207 | usb_kill_urb(port->interrupt_in_urb); | |
208 | ||
43d186fe AB |
209 | return result; |
210 | } | |
211 | ||
43d186fe AB |
212 | static int metrousb_set_modem_ctrl(struct usb_serial *serial, unsigned int control_state) |
213 | { | |
214 | int retval = 0; | |
215 | unsigned char mcr = METROUSB_MCR_NONE; | |
216 | ||
5db51b50 GKH |
217 | dev_dbg(&serial->dev->dev, "%s - control state = %d\n", |
218 | __func__, control_state); | |
43d186fe AB |
219 | |
220 | /* Set the modem control value. */ | |
221 | if (control_state & TIOCM_DTR) | |
222 | mcr |= METROUSB_MCR_DTR; | |
223 | if (control_state & TIOCM_RTS) | |
224 | mcr |= METROUSB_MCR_RTS; | |
225 | ||
226 | /* Send the command to the usb port. */ | |
227 | retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
228 | METROUSB_SET_REQUEST_TYPE, METROUSB_SET_MODEM_CTRL_REQUEST, | |
229 | control_state, 0, NULL, 0, WDR_TIMEOUT); | |
230 | if (retval < 0) | |
91fbecfe | 231 | dev_err(&serial->dev->dev, |
5db51b50 GKH |
232 | "%s - set modem ctrl=0x%x failed, error code=%d\n", |
233 | __func__, mcr, retval); | |
43d186fe AB |
234 | |
235 | return retval; | |
236 | } | |
237 | ||
50dde868 | 238 | static int metrousb_port_probe(struct usb_serial_port *port) |
43d186fe | 239 | { |
50dde868 | 240 | struct metrousb_private *metro_priv; |
43d186fe | 241 | |
50dde868 JH |
242 | metro_priv = kzalloc(sizeof(*metro_priv), GFP_KERNEL); |
243 | if (!metro_priv) | |
244 | return -ENOMEM; | |
43d186fe | 245 | |
50dde868 | 246 | spin_lock_init(&metro_priv->lock); |
43d186fe | 247 | |
50dde868 | 248 | usb_set_serial_port_data(port, metro_priv); |
43d186fe | 249 | |
50dde868 | 250 | return 0; |
43d186fe AB |
251 | } |
252 | ||
50dde868 | 253 | static int metrousb_port_remove(struct usb_serial_port *port) |
43d186fe AB |
254 | { |
255 | struct metrousb_private *metro_priv; | |
43d186fe | 256 | |
50dde868 JH |
257 | metro_priv = usb_get_serial_port_data(port); |
258 | kfree(metro_priv); | |
43d186fe AB |
259 | |
260 | return 0; | |
261 | } | |
262 | ||
d4cbd6e9 | 263 | static void metrousb_throttle(struct tty_struct *tty) |
43d186fe AB |
264 | { |
265 | struct usb_serial_port *port = tty->driver_data; | |
266 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); | |
267 | unsigned long flags = 0; | |
268 | ||
43d186fe AB |
269 | /* Set the private information for the port to stop reading data. */ |
270 | spin_lock_irqsave(&metro_priv->lock, flags); | |
271 | metro_priv->throttled = 1; | |
272 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
273 | } | |
274 | ||
d4cbd6e9 | 275 | static int metrousb_tiocmget(struct tty_struct *tty) |
43d186fe AB |
276 | { |
277 | unsigned long control_state = 0; | |
278 | struct usb_serial_port *port = tty->driver_data; | |
279 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); | |
280 | unsigned long flags = 0; | |
281 | ||
43d186fe AB |
282 | spin_lock_irqsave(&metro_priv->lock, flags); |
283 | control_state = metro_priv->control_state; | |
284 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
285 | ||
286 | return control_state; | |
287 | } | |
288 | ||
d4cbd6e9 GKH |
289 | static int metrousb_tiocmset(struct tty_struct *tty, |
290 | unsigned int set, unsigned int clear) | |
43d186fe AB |
291 | { |
292 | struct usb_serial_port *port = tty->driver_data; | |
293 | struct usb_serial *serial = port->serial; | |
294 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); | |
295 | unsigned long flags = 0; | |
296 | unsigned long control_state = 0; | |
297 | ||
5db51b50 | 298 | dev_dbg(tty->dev, "%s - set=%d, clear=%d\n", __func__, set, clear); |
43d186fe AB |
299 | |
300 | spin_lock_irqsave(&metro_priv->lock, flags); | |
301 | control_state = metro_priv->control_state; | |
302 | ||
d4cbd6e9 | 303 | /* Set the RTS and DTR values. */ |
43d186fe AB |
304 | if (set & TIOCM_RTS) |
305 | control_state |= TIOCM_RTS; | |
306 | if (set & TIOCM_DTR) | |
307 | control_state |= TIOCM_DTR; | |
308 | if (clear & TIOCM_RTS) | |
309 | control_state &= ~TIOCM_RTS; | |
310 | if (clear & TIOCM_DTR) | |
311 | control_state &= ~TIOCM_DTR; | |
312 | ||
313 | metro_priv->control_state = control_state; | |
314 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
315 | return metrousb_set_modem_ctrl(serial, control_state); | |
316 | } | |
317 | ||
d4cbd6e9 | 318 | static void metrousb_unthrottle(struct tty_struct *tty) |
43d186fe AB |
319 | { |
320 | struct usb_serial_port *port = tty->driver_data; | |
321 | struct metrousb_private *metro_priv = usb_get_serial_port_data(port); | |
322 | unsigned long flags = 0; | |
323 | int result = 0; | |
324 | ||
43d186fe AB |
325 | /* Set the private information for the port to resume reading data. */ |
326 | spin_lock_irqsave(&metro_priv->lock, flags); | |
327 | metro_priv->throttled = 0; | |
328 | spin_unlock_irqrestore(&metro_priv->lock, flags); | |
329 | ||
330 | /* Submit the urb to read from the port. */ | |
43d186fe | 331 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
5db51b50 | 332 | if (result) |
91fbecfe | 333 | dev_err(tty->dev, |
5db51b50 GKH |
334 | "failed submitting interrupt in urb error code=%d\n", |
335 | result); | |
43d186fe AB |
336 | } |
337 | ||
9fbd1649 GKH |
338 | static struct usb_serial_driver metrousb_device = { |
339 | .driver = { | |
340 | .owner = THIS_MODULE, | |
341 | .name = "metro-usb", | |
342 | }, | |
e2dd3af4 | 343 | .description = "Metrologic USB to Serial", |
9fbd1649 GKH |
344 | .id_table = id_table, |
345 | .num_ports = 1, | |
346 | .open = metrousb_open, | |
347 | .close = metrousb_cleanup, | |
348 | .read_int_callback = metrousb_read_int_callback, | |
50dde868 JH |
349 | .port_probe = metrousb_port_probe, |
350 | .port_remove = metrousb_port_remove, | |
9fbd1649 GKH |
351 | .throttle = metrousb_throttle, |
352 | .unthrottle = metrousb_unthrottle, | |
353 | .tiocmget = metrousb_tiocmget, | |
354 | .tiocmset = metrousb_tiocmset, | |
355 | }; | |
356 | ||
357 | static struct usb_serial_driver * const serial_drivers[] = { | |
358 | &metrousb_device, | |
359 | NULL, | |
360 | }; | |
361 | ||
68e24113 | 362 | module_usb_serial_driver(serial_drivers, id_table); |
1935e357 | 363 | |
43d186fe | 364 | MODULE_LICENSE("GPL"); |
d4cbd6e9 GKH |
365 | MODULE_AUTHOR("Philip Nicastro"); |
366 | MODULE_AUTHOR("Aleksey Babahin <tamerlan311@gmail.com>"); | |
367 | MODULE_DESCRIPTION(DRIVER_DESC); |