Commit | Line | Data |
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0f64478c GKH |
1 | /* |
2 | * mos7720.c | |
3 | * Controls the Moschip 7720 usb to dual port serial convertor | |
4 | * | |
5 | * Copyright 2006 Moschip Semiconductor Tech. Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2 of the License. | |
10 | * | |
11 | * Developed by: | |
50d2dc72 GKH |
12 | * Vijaya Kumar <vijaykumar.gn@gmail.com> |
13 | * Ajay Kumar <naanuajay@yahoo.com> | |
14 | * Gurudeva <ngurudeva@yahoo.com> | |
0f64478c GKH |
15 | * |
16 | * Cleaned up from the original by: | |
17 | * Greg Kroah-Hartman <gregkh@suse.de> | |
18 | * | |
19 | * Originally based on drivers/usb/serial/io_edgeport.c which is: | |
20 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. | |
21 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
22 | */ | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/serial.h> | |
33 | #include <linux/serial_reg.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
4da1a17d | 36 | #include <linux/uaccess.h> |
b69578df | 37 | #include <linux/parport.h> |
0f64478c | 38 | |
0f64478c GKH |
39 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
40 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
41 | ||
42 | /* default urb timeout */ | |
849513a7 | 43 | #define MOS_WDR_TIMEOUT 5000 |
0f64478c | 44 | |
0f64478c GKH |
45 | #define MOS_MAX_PORT 0x02 |
46 | #define MOS_WRITE 0x0E | |
47 | #define MOS_READ 0x0D | |
48 | ||
49 | /* Interrupt Rotinue Defines */ | |
50 | #define SERIAL_IIR_RLS 0x06 | |
51 | #define SERIAL_IIR_RDA 0x04 | |
52 | #define SERIAL_IIR_CTI 0x0c | |
53 | #define SERIAL_IIR_THR 0x02 | |
54 | #define SERIAL_IIR_MS 0x00 | |
55 | ||
56 | #define NUM_URBS 16 /* URB Count */ | |
57 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
58 | ||
b69578df | 59 | /* This structure holds all of the local serial port information */ |
4da1a17d | 60 | struct moschip_port { |
0f64478c GKH |
61 | __u8 shadowLCR; /* last LCR value received */ |
62 | __u8 shadowMCR; /* last MCR value received */ | |
63 | __u8 shadowMSR; /* last MSR value received */ | |
64 | char open; | |
0f64478c GKH |
65 | struct usb_serial_port *port; /* loop back to the owner */ |
66 | struct urb *write_urb_pool[NUM_URBS]; | |
67 | }; | |
68 | ||
fb088e33 MD |
69 | static struct usb_serial_driver moschip7720_2port_driver; |
70 | ||
0f64478c GKH |
71 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
72 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
73 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
74 | ||
68e24113 | 75 | static const struct usb_device_id id_table[] = { |
4da1a17d | 76 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 77 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
78 | { } /* terminating entry */ |
79 | }; | |
68e24113 | 80 | MODULE_DEVICE_TABLE(usb, id_table); |
0f64478c | 81 | |
b69578df MD |
82 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
83 | ||
84 | /* initial values for parport regs */ | |
85 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
86 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
87 | ||
88 | struct urbtracker { | |
89 | struct mos7715_parport *mos_parport; | |
90 | struct list_head urblist_entry; | |
91 | struct kref ref_count; | |
92 | struct urb *urb; | |
ef6c8c1d | 93 | struct usb_ctrlrequest *setup; |
b69578df MD |
94 | }; |
95 | ||
96 | enum mos7715_pp_modes { | |
97 | SPP = 0<<5, | |
98 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
99 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
100 | }; | |
101 | ||
102 | struct mos7715_parport { | |
103 | struct parport *pp; /* back to containing struct */ | |
104 | struct kref ref_count; /* to instance of this struct */ | |
105 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
106 | struct list_head active_urbs; /* list async urbs in flight */ | |
107 | spinlock_t listlock; /* protects list access */ | |
108 | bool msg_pending; /* usb sync call pending */ | |
109 | struct completion syncmsg_compl; /* usb sync call completed */ | |
110 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
111 | struct usb_serial *serial; /* back to containing struct */ | |
112 | __u8 shadowECR; /* parallel port regs... */ | |
113 | __u8 shadowDCR; | |
114 | atomic_t shadowDSR; /* updated in int-in callback */ | |
115 | }; | |
116 | ||
117 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
118 | static DEFINE_SPINLOCK(release_lock); | |
119 | ||
63b91767 MD |
120 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
121 | ||
122 | static const unsigned int dummy; /* for clarity in register access fns */ | |
123 | ||
b69578df MD |
124 | enum mos_regs { |
125 | THR, /* serial port regs */ | |
126 | RHR, | |
127 | IER, | |
128 | FCR, | |
129 | ISR, | |
130 | LCR, | |
131 | MCR, | |
132 | LSR, | |
133 | MSR, | |
134 | SPR, | |
135 | DLL, | |
136 | DLM, | |
137 | DPR, /* parallel port regs */ | |
138 | DSR, | |
139 | DCR, | |
140 | ECR, | |
141 | SP1_REG, /* device control regs */ | |
142 | SP2_REG, /* serial port 2 (7720 only) */ | |
143 | PP_REG, | |
144 | SP_CONTROL_REG, | |
145 | }; | |
146 | ||
147 | /* | |
148 | * Return the correct value for the Windex field of the setup packet | |
149 | * for a control endpoint message. See the 7715 datasheet. | |
150 | */ | |
151 | static inline __u16 get_reg_index(enum mos_regs reg) | |
152 | { | |
153 | static const __u16 mos7715_index_lookup_table[] = { | |
154 | 0x00, /* THR */ | |
155 | 0x00, /* RHR */ | |
156 | 0x01, /* IER */ | |
157 | 0x02, /* FCR */ | |
158 | 0x02, /* ISR */ | |
159 | 0x03, /* LCR */ | |
160 | 0x04, /* MCR */ | |
161 | 0x05, /* LSR */ | |
162 | 0x06, /* MSR */ | |
163 | 0x07, /* SPR */ | |
164 | 0x00, /* DLL */ | |
165 | 0x01, /* DLM */ | |
166 | 0x00, /* DPR */ | |
167 | 0x01, /* DSR */ | |
168 | 0x02, /* DCR */ | |
169 | 0x0a, /* ECR */ | |
170 | 0x01, /* SP1_REG */ | |
171 | 0x02, /* SP2_REG (7720 only) */ | |
172 | 0x04, /* PP_REG (7715 only) */ | |
173 | 0x08, /* SP_CONTROL_REG */ | |
174 | }; | |
175 | return mos7715_index_lookup_table[reg]; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Return the correct value for the upper byte of the Wvalue field of | |
180 | * the setup packet for a control endpoint message. | |
181 | */ | |
63b91767 MD |
182 | static inline __u16 get_reg_value(enum mos_regs reg, |
183 | unsigned int serial_portnum) | |
b69578df MD |
184 | { |
185 | if (reg >= SP1_REG) /* control reg */ | |
186 | return 0x0000; | |
63b91767 MD |
187 | |
188 | else if (reg >= DPR) /* parallel port reg (7715 only) */ | |
b69578df | 189 | return 0x0100; |
63b91767 MD |
190 | |
191 | else /* serial port reg */ | |
192 | return (serial_portnum + 2) << 8; | |
b69578df MD |
193 | } |
194 | ||
195 | /* | |
196 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
197 | * the value field of the setup packet. serial_portnum is ignored for registers |
198 | * not specific to a particular serial port. | |
b69578df | 199 | */ |
63b91767 MD |
200 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
201 | enum mos_regs reg, __u8 data) | |
b69578df | 202 | { |
b69578df MD |
203 | struct usb_device *usbdev = serial->dev; |
204 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
205 | __u8 request = (__u8)0x0e; | |
206 | __u8 requesttype = (__u8)0x40; | |
b69578df | 207 | __u16 index = get_reg_index(reg); |
63b91767 MD |
208 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
209 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
210 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
211 | if (status < 0) |
212 | dev_err(&usbdev->dev, | |
213 | "mos7720: usb_control_msg() failed: %d", status); | |
214 | return status; | |
215 | } | |
216 | ||
217 | /* | |
218 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
219 | * device is embedded in the value field of the setup packet. serial_portnum is |
220 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 221 | */ |
63b91767 MD |
222 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
223 | enum mos_regs reg, __u8 *data) | |
b69578df | 224 | { |
63b91767 | 225 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
226 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
227 | __u8 request = (__u8)0x0d; | |
228 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 229 | __u16 index = get_reg_index(reg); |
63b91767 | 230 | __u16 value = get_reg_value(reg, serial_portnum); |
72ea18a5 JH |
231 | u8 *buf; |
232 | int status; | |
233 | ||
234 | buf = kmalloc(1, GFP_KERNEL); | |
235 | if (!buf) | |
236 | return -ENOMEM; | |
237 | ||
238 | status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
239 | index, buf, 1, MOS_WDR_TIMEOUT); | |
240 | if (status == 1) | |
241 | *data = *buf; | |
242 | else if (status < 0) | |
b69578df MD |
243 | dev_err(&usbdev->dev, |
244 | "mos7720: usb_control_msg() failed: %d", status); | |
72ea18a5 JH |
245 | kfree(buf); |
246 | ||
b69578df MD |
247 | return status; |
248 | } | |
249 | ||
63b91767 MD |
250 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
251 | ||
b69578df MD |
252 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
253 | enum mos7715_pp_modes mode) | |
254 | { | |
255 | mos_parport->shadowECR = mode; | |
63b91767 | 256 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
257 | return 0; |
258 | } | |
259 | ||
260 | static void destroy_mos_parport(struct kref *kref) | |
261 | { | |
262 | struct mos7715_parport *mos_parport = | |
263 | container_of(kref, struct mos7715_parport, ref_count); | |
264 | ||
b69578df MD |
265 | kfree(mos_parport); |
266 | } | |
267 | ||
268 | static void destroy_urbtracker(struct kref *kref) | |
269 | { | |
270 | struct urbtracker *urbtrack = | |
271 | container_of(kref, struct urbtracker, ref_count); | |
272 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 273 | |
b69578df | 274 | usb_free_urb(urbtrack->urb); |
ef6c8c1d | 275 | kfree(urbtrack->setup); |
b69578df MD |
276 | kfree(urbtrack); |
277 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
278 | } | |
279 | ||
280 | /* | |
281 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
282 | * port callback had to be deferred because the disconnect mutex could not be | |
283 | * obtained at the time. | |
284 | */ | |
285 | static void send_deferred_urbs(unsigned long _mos_parport) | |
286 | { | |
287 | int ret_val; | |
288 | unsigned long flags; | |
289 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 290 | struct urbtracker *urbtrack, *tmp; |
b69578df | 291 | struct list_head *cursor, *next; |
9eecf808 | 292 | struct device *dev; |
b69578df | 293 | |
b69578df MD |
294 | /* if release function ran, game over */ |
295 | if (unlikely(mos_parport->serial == NULL)) | |
296 | return; | |
297 | ||
9eecf808 GKH |
298 | dev = &mos_parport->serial->dev->dev; |
299 | ||
b69578df MD |
300 | /* try again to get the mutex */ |
301 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 302 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
303 | tasklet_schedule(&mos_parport->urb_tasklet); |
304 | return; | |
305 | } | |
306 | ||
307 | /* if device disconnected, game over */ | |
308 | if (unlikely(mos_parport->serial->disconnected)) { | |
309 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
310 | return; | |
311 | } | |
312 | ||
313 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
314 | if (list_empty(&mos_parport->deferred_urbs)) { | |
315 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
316 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 317 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
318 | return; |
319 | } | |
320 | ||
321 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
322 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
323 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 324 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
325 | urblist_entry) { |
326 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 327 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 328 | if (ret_val) { |
9eecf808 | 329 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
330 | list_del(&urbtrack->urblist_entry); |
331 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
332 | } | |
333 | } | |
334 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
335 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
336 | } | |
337 | ||
338 | /* callback for parallel port control urbs submitted asynchronously */ | |
339 | static void async_complete(struct urb *urb) | |
340 | { | |
341 | struct urbtracker *urbtrack = urb->context; | |
342 | int status = urb->status; | |
ca09907d | 343 | |
b69578df | 344 | if (unlikely(status)) |
9eecf808 | 345 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
346 | |
347 | /* remove the urbtracker from the active_urbs list */ | |
348 | spin_lock(&urbtrack->mos_parport->listlock); | |
349 | list_del(&urbtrack->urblist_entry); | |
350 | spin_unlock(&urbtrack->mos_parport->listlock); | |
351 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
352 | } | |
353 | ||
354 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
355 | enum mos_regs reg, __u8 data) | |
356 | { | |
357 | struct urbtracker *urbtrack; | |
358 | int ret_val; | |
359 | unsigned long flags; | |
b69578df MD |
360 | struct usb_serial *serial = mos_parport->serial; |
361 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
362 | |
363 | /* create and initialize the control urb and containing urbtracker */ | |
364 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
365 | if (urbtrack == NULL) { | |
366 | dev_err(&usbdev->dev, "out of memory"); | |
367 | return -ENOMEM; | |
368 | } | |
369 | kref_get(&mos_parport->ref_count); | |
370 | urbtrack->mos_parport = mos_parport; | |
371 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
372 | if (urbtrack->urb == NULL) { | |
373 | dev_err(&usbdev->dev, "out of urbs"); | |
374 | kfree(urbtrack); | |
375 | return -ENOMEM; | |
376 | } | |
d0bd9a41 | 377 | urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); |
ef6c8c1d JH |
378 | if (!urbtrack->setup) { |
379 | usb_free_urb(urbtrack->urb); | |
380 | kfree(urbtrack); | |
381 | return -ENOMEM; | |
382 | } | |
383 | urbtrack->setup->bRequestType = (__u8)0x40; | |
384 | urbtrack->setup->bRequest = (__u8)0x0e; | |
3b716caf JH |
385 | urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); |
386 | urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); | |
ef6c8c1d | 387 | urbtrack->setup->wLength = 0; |
b69578df MD |
388 | usb_fill_control_urb(urbtrack->urb, usbdev, |
389 | usb_sndctrlpipe(usbdev, 0), | |
ef6c8c1d | 390 | (unsigned char *)urbtrack->setup, |
b69578df MD |
391 | NULL, 0, async_complete, urbtrack); |
392 | kref_init(&urbtrack->ref_count); | |
393 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
394 | ||
395 | /* | |
396 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
397 | * and schedule a tasklet to try again later | |
398 | */ | |
399 | if (!mutex_trylock(&serial->disc_mutex)) { | |
400 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
401 | list_add_tail(&urbtrack->urblist_entry, | |
402 | &mos_parport->deferred_urbs); | |
403 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
404 | tasklet_schedule(&mos_parport->urb_tasklet); | |
9eecf808 | 405 | dev_dbg(&usbdev->dev, "tasklet scheduled"); |
b69578df MD |
406 | return 0; |
407 | } | |
408 | ||
409 | /* bail if device disconnected */ | |
410 | if (serial->disconnected) { | |
411 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
412 | mutex_unlock(&serial->disc_mutex); | |
413 | return -ENODEV; | |
414 | } | |
415 | ||
416 | /* add the tracker to the active_urbs list and submit */ | |
417 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
418 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
419 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
420 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
421 | mutex_unlock(&serial->disc_mutex); | |
422 | if (ret_val) { | |
423 | dev_err(&usbdev->dev, | |
424 | "%s: submit_urb() failed: %d", __func__, ret_val); | |
425 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
426 | list_del(&urbtrack->urblist_entry); | |
427 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
428 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
429 | return ret_val; | |
430 | } | |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* | |
435 | * This is the the common top part of all parallel port callback operations that | |
436 | * send synchronous messages to the device. This implements convoluted locking | |
437 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
438 | * has called our release function, at which point struct mos7715_parport has | |
439 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
440 | * not called the release function yet because someone has a serial port open. | |
441 | * The shared release_lock prevents the first, and the mutex and disconnected | |
442 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
443 | * flag to ensure that all synchronous usb messgage calls have completed before | |
444 | * our release function can return. | |
445 | */ | |
446 | static int parport_prologue(struct parport *pp) | |
447 | { | |
448 | struct mos7715_parport *mos_parport; | |
449 | ||
450 | spin_lock(&release_lock); | |
451 | mos_parport = pp->private_data; | |
452 | if (unlikely(mos_parport == NULL)) { | |
453 | /* release fn called, port struct destroyed */ | |
454 | spin_unlock(&release_lock); | |
455 | return -1; | |
456 | } | |
457 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
458 | INIT_COMPLETION(mos_parport->syncmsg_compl); | |
459 | spin_unlock(&release_lock); | |
460 | ||
461 | mutex_lock(&mos_parport->serial->disc_mutex); | |
462 | if (mos_parport->serial->disconnected) { | |
463 | /* device disconnected */ | |
464 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
465 | mos_parport->msg_pending = false; | |
466 | complete(&mos_parport->syncmsg_compl); | |
467 | return -1; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /* | |
474 | * This is the the common bottom part of all parallel port functions that send | |
475 | * synchronous messages to the device. | |
476 | */ | |
477 | static inline void parport_epilogue(struct parport *pp) | |
478 | { | |
479 | struct mos7715_parport *mos_parport = pp->private_data; | |
480 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
481 | mos_parport->msg_pending = false; | |
482 | complete(&mos_parport->syncmsg_compl); | |
483 | } | |
484 | ||
485 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
486 | { | |
487 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 488 | |
b69578df MD |
489 | if (parport_prologue(pp) < 0) |
490 | return; | |
491 | mos7715_change_mode(mos_parport, SPP); | |
63b91767 | 492 | write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d); |
b69578df MD |
493 | parport_epilogue(pp); |
494 | } | |
495 | ||
496 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
497 | { | |
498 | struct mos7715_parport *mos_parport = pp->private_data; | |
499 | unsigned char d; | |
ca09907d | 500 | |
b69578df MD |
501 | if (parport_prologue(pp) < 0) |
502 | return 0; | |
63b91767 | 503 | read_mos_reg(mos_parport->serial, dummy, DPR, &d); |
b69578df MD |
504 | parport_epilogue(pp); |
505 | return d; | |
506 | } | |
507 | ||
508 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
509 | { | |
510 | struct mos7715_parport *mos_parport = pp->private_data; | |
511 | __u8 data; | |
ca09907d | 512 | |
b69578df MD |
513 | if (parport_prologue(pp) < 0) |
514 | return; | |
515 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
63b91767 | 516 | write_mos_reg(mos_parport->serial, dummy, DCR, data); |
b69578df MD |
517 | mos_parport->shadowDCR = data; |
518 | parport_epilogue(pp); | |
519 | } | |
520 | ||
521 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
522 | { | |
523 | struct mos7715_parport *mos_parport = pp->private_data; | |
524 | __u8 dcr; | |
ca09907d | 525 | |
b69578df MD |
526 | spin_lock(&release_lock); |
527 | mos_parport = pp->private_data; | |
528 | if (unlikely(mos_parport == NULL)) { | |
529 | spin_unlock(&release_lock); | |
530 | return 0; | |
531 | } | |
532 | dcr = mos_parport->shadowDCR & 0x0f; | |
533 | spin_unlock(&release_lock); | |
534 | return dcr; | |
535 | } | |
536 | ||
537 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
538 | unsigned char mask, | |
539 | unsigned char val) | |
540 | { | |
541 | struct mos7715_parport *mos_parport = pp->private_data; | |
542 | __u8 dcr; | |
ca09907d | 543 | |
b69578df MD |
544 | mask &= 0x0f; |
545 | val &= 0x0f; | |
546 | if (parport_prologue(pp) < 0) | |
547 | return 0; | |
548 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
63b91767 | 549 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
550 | dcr = mos_parport->shadowDCR & 0x0f; |
551 | parport_epilogue(pp); | |
552 | return dcr; | |
553 | } | |
554 | ||
555 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
556 | { | |
557 | unsigned char status; | |
558 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 559 | |
b69578df MD |
560 | spin_lock(&release_lock); |
561 | mos_parport = pp->private_data; | |
562 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
563 | spin_unlock(&release_lock); | |
564 | return 0; | |
565 | } | |
566 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
567 | spin_unlock(&release_lock); | |
568 | return status; | |
569 | } | |
570 | ||
571 | static void parport_mos7715_enable_irq(struct parport *pp) | |
572 | { | |
b69578df | 573 | } |
ca09907d | 574 | |
b69578df MD |
575 | static void parport_mos7715_disable_irq(struct parport *pp) |
576 | { | |
b69578df MD |
577 | } |
578 | ||
579 | static void parport_mos7715_data_forward(struct parport *pp) | |
580 | { | |
581 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 582 | |
b69578df MD |
583 | if (parport_prologue(pp) < 0) |
584 | return; | |
585 | mos7715_change_mode(mos_parport, PS2); | |
586 | mos_parport->shadowDCR &= ~0x20; | |
63b91767 | 587 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
588 | parport_epilogue(pp); |
589 | } | |
590 | ||
591 | static void parport_mos7715_data_reverse(struct parport *pp) | |
592 | { | |
593 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 594 | |
b69578df MD |
595 | if (parport_prologue(pp) < 0) |
596 | return; | |
597 | mos7715_change_mode(mos_parport, PS2); | |
598 | mos_parport->shadowDCR |= 0x20; | |
63b91767 | 599 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
600 | parport_epilogue(pp); |
601 | } | |
602 | ||
603 | static void parport_mos7715_init_state(struct pardevice *dev, | |
604 | struct parport_state *s) | |
605 | { | |
b69578df MD |
606 | s->u.pc.ctr = DCR_INIT_VAL; |
607 | s->u.pc.ecr = ECR_INIT_VAL; | |
608 | } | |
609 | ||
610 | /* N.B. Parport core code requires that this function not block */ | |
611 | static void parport_mos7715_save_state(struct parport *pp, | |
612 | struct parport_state *s) | |
613 | { | |
614 | struct mos7715_parport *mos_parport; | |
ca09907d | 615 | |
b69578df MD |
616 | spin_lock(&release_lock); |
617 | mos_parport = pp->private_data; | |
618 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
619 | spin_unlock(&release_lock); | |
620 | return; | |
621 | } | |
622 | s->u.pc.ctr = mos_parport->shadowDCR; | |
623 | s->u.pc.ecr = mos_parport->shadowECR; | |
624 | spin_unlock(&release_lock); | |
625 | } | |
626 | ||
627 | /* N.B. Parport core code requires that this function not block */ | |
628 | static void parport_mos7715_restore_state(struct parport *pp, | |
629 | struct parport_state *s) | |
630 | { | |
631 | struct mos7715_parport *mos_parport; | |
ca09907d | 632 | |
b69578df MD |
633 | spin_lock(&release_lock); |
634 | mos_parport = pp->private_data; | |
635 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
636 | spin_unlock(&release_lock); | |
637 | return; | |
638 | } | |
639 | write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); | |
640 | write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); | |
641 | spin_unlock(&release_lock); | |
642 | } | |
643 | ||
644 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
645 | const void *buffer, | |
646 | size_t len, int flags) | |
647 | { | |
648 | int retval; | |
649 | struct mos7715_parport *mos_parport = pp->private_data; | |
650 | int actual_len; | |
ca09907d | 651 | |
b69578df MD |
652 | if (parport_prologue(pp) < 0) |
653 | return 0; | |
654 | mos7715_change_mode(mos_parport, PPF); | |
655 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
656 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
657 | (void *)buffer, len, &actual_len, | |
658 | MOS_WDR_TIMEOUT); | |
659 | parport_epilogue(pp); | |
660 | if (retval) { | |
661 | dev_err(&mos_parport->serial->dev->dev, | |
662 | "mos7720: usb_bulk_msg() failed: %d", retval); | |
663 | return 0; | |
664 | } | |
665 | return actual_len; | |
666 | } | |
667 | ||
668 | static struct parport_operations parport_mos7715_ops = { | |
669 | .owner = THIS_MODULE, | |
670 | .write_data = parport_mos7715_write_data, | |
671 | .read_data = parport_mos7715_read_data, | |
672 | ||
673 | .write_control = parport_mos7715_write_control, | |
674 | .read_control = parport_mos7715_read_control, | |
675 | .frob_control = parport_mos7715_frob_control, | |
676 | ||
677 | .read_status = parport_mos7715_read_status, | |
678 | ||
679 | .enable_irq = parport_mos7715_enable_irq, | |
680 | .disable_irq = parport_mos7715_disable_irq, | |
681 | ||
682 | .data_forward = parport_mos7715_data_forward, | |
683 | .data_reverse = parport_mos7715_data_reverse, | |
684 | ||
685 | .init_state = parport_mos7715_init_state, | |
686 | .save_state = parport_mos7715_save_state, | |
687 | .restore_state = parport_mos7715_restore_state, | |
688 | ||
689 | .compat_write_data = parport_mos7715_write_compat, | |
690 | ||
691 | .nibble_read_data = parport_ieee1284_read_nibble, | |
692 | .byte_read_data = parport_ieee1284_read_byte, | |
693 | }; | |
694 | ||
695 | /* | |
696 | * Allocate and initialize parallel port control struct, initialize | |
697 | * the parallel port hardware device, and register with the parport subsystem. | |
698 | */ | |
699 | static int mos7715_parport_init(struct usb_serial *serial) | |
700 | { | |
701 | struct mos7715_parport *mos_parport; | |
702 | ||
703 | /* allocate and initialize parallel port control struct */ | |
704 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
705 | if (mos_parport == NULL) { | |
9eecf808 | 706 | dev_dbg(&serial->dev->dev, "%s: kzalloc failed\n", __func__); |
b69578df MD |
707 | return -ENOMEM; |
708 | } | |
709 | mos_parport->msg_pending = false; | |
710 | kref_init(&mos_parport->ref_count); | |
711 | spin_lock_init(&mos_parport->listlock); | |
712 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
713 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
714 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
715 | mos_parport->serial = serial; | |
716 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
717 | (unsigned long) mos_parport); | |
718 | init_completion(&mos_parport->syncmsg_compl); | |
719 | ||
720 | /* cycle parallel port reset bit */ | |
63b91767 MD |
721 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
722 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); | |
b69578df MD |
723 | |
724 | /* initialize device registers */ | |
725 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
63b91767 | 726 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df | 727 | mos_parport->shadowECR = ECR_INIT_VAL; |
63b91767 | 728 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
729 | |
730 | /* register with parport core */ | |
731 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
732 | PARPORT_DMA_NONE, | |
733 | &parport_mos7715_ops); | |
734 | if (mos_parport->pp == NULL) { | |
735 | dev_err(&serial->interface->dev, | |
736 | "Could not register parport\n"); | |
737 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
738 | return -EIO; | |
739 | } | |
740 | mos_parport->pp->private_data = mos_parport; | |
741 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
742 | mos_parport->pp->dev = &serial->interface->dev; | |
743 | parport_announce_port(mos_parport->pp); | |
744 | ||
745 | return 0; | |
746 | } | |
747 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
748 | |
749 | /* | |
750 | * mos7720_interrupt_callback | |
751 | * this is the callback function for when we have received data on the | |
752 | * interrupt endpoint. | |
753 | */ | |
754 | static void mos7720_interrupt_callback(struct urb *urb) | |
755 | { | |
756 | int result; | |
757 | int length; | |
81105984 | 758 | int status = urb->status; |
9eecf808 | 759 | struct device *dev = &urb->dev->dev; |
325b70c2 | 760 | __u8 *data; |
0f64478c GKH |
761 | __u8 sp1; |
762 | __u8 sp2; | |
0f64478c | 763 | |
81105984 | 764 | switch (status) { |
0f64478c GKH |
765 | case 0: |
766 | /* success */ | |
767 | break; | |
768 | case -ECONNRESET: | |
769 | case -ENOENT: | |
770 | case -ESHUTDOWN: | |
771 | /* this urb is terminated, clean up */ | |
9eecf808 | 772 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
773 | return; |
774 | default: | |
9eecf808 | 775 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
776 | goto exit; |
777 | } | |
778 | ||
779 | length = urb->actual_length; | |
780 | data = urb->transfer_buffer; | |
781 | ||
782 | /* Moschip get 4 bytes | |
783 | * Byte 1 IIR Port 1 (port.number is 0) | |
784 | * Byte 2 IIR Port 2 (port.number is 1) | |
785 | * Byte 3 -------------- | |
786 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
787 | |
788 | /* the above description is inverted | |
789 | * oneukum 2007-03-14 */ | |
790 | ||
791 | if (unlikely(length != 4)) { | |
9eecf808 | 792 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
793 | return; |
794 | } | |
795 | ||
325b70c2 ON |
796 | sp1 = data[3]; |
797 | sp2 = data[2]; | |
0f64478c | 798 | |
325b70c2 | 799 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 800 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 801 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
802 | } else { |
803 | switch (sp1 & 0x0f) { | |
804 | case SERIAL_IIR_RLS: | |
9eecf808 | 805 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
806 | break; |
807 | case SERIAL_IIR_CTI: | |
9eecf808 | 808 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
809 | break; |
810 | case SERIAL_IIR_MS: | |
9eecf808 | 811 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
812 | break; |
813 | } | |
814 | ||
815 | switch (sp2 & 0x0f) { | |
816 | case SERIAL_IIR_RLS: | |
9eecf808 | 817 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
818 | break; |
819 | case SERIAL_IIR_CTI: | |
9eecf808 | 820 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
821 | break; |
822 | case SERIAL_IIR_MS: | |
9eecf808 | 823 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
824 | break; |
825 | } | |
826 | } | |
827 | ||
828 | exit: | |
829 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
830 | if (result) | |
9eecf808 | 831 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
0f64478c GKH |
832 | } |
833 | ||
fb088e33 MD |
834 | /* |
835 | * mos7715_interrupt_callback | |
836 | * this is the 7715's callback function for when we have received data on | |
837 | * the interrupt endpoint. | |
838 | */ | |
839 | static void mos7715_interrupt_callback(struct urb *urb) | |
840 | { | |
841 | int result; | |
842 | int length; | |
843 | int status = urb->status; | |
9eecf808 | 844 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
845 | __u8 *data; |
846 | __u8 iir; | |
847 | ||
848 | switch (status) { | |
849 | case 0: | |
850 | /* success */ | |
851 | break; | |
852 | case -ECONNRESET: | |
853 | case -ENOENT: | |
854 | case -ESHUTDOWN: | |
b69578df | 855 | case -ENODEV: |
fb088e33 | 856 | /* this urb is terminated, clean up */ |
9eecf808 | 857 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
858 | return; |
859 | default: | |
9eecf808 | 860 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
861 | goto exit; |
862 | } | |
863 | ||
864 | length = urb->actual_length; | |
865 | data = urb->transfer_buffer; | |
866 | ||
867 | /* Structure of data from 7715 device: | |
868 | * Byte 1: IIR serial Port | |
869 | * Byte 2: unused | |
870 | * Byte 2: DSR parallel port | |
871 | * Byte 4: FIFO status for both */ | |
872 | ||
873 | if (unlikely(length != 4)) { | |
9eecf808 | 874 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
875 | return; |
876 | } | |
877 | ||
878 | iir = data[0]; | |
879 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
880 | switch (iir & 0x0f) { | |
881 | case SERIAL_IIR_RLS: | |
9eecf808 | 882 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n\n"); |
fb088e33 MD |
883 | break; |
884 | case SERIAL_IIR_CTI: | |
9eecf808 | 885 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
886 | break; |
887 | case SERIAL_IIR_MS: | |
9eecf808 | 888 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
889 | break; |
890 | } | |
891 | } | |
892 | ||
b69578df MD |
893 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
894 | { /* update local copy of DSR reg */ | |
895 | struct usb_serial_port *port = urb->context; | |
896 | struct mos7715_parport *mos_parport = port->serial->private; | |
897 | if (unlikely(mos_parport == NULL)) | |
898 | return; | |
899 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
900 | } | |
901 | #endif | |
902 | ||
fb088e33 MD |
903 | exit: |
904 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
905 | if (result) | |
9eecf808 | 906 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
907 | } |
908 | ||
0f64478c GKH |
909 | /* |
910 | * mos7720_bulk_in_callback | |
911 | * this is the callback function for when we have received data on the | |
912 | * bulk in endpoint. | |
913 | */ | |
914 | static void mos7720_bulk_in_callback(struct urb *urb) | |
915 | { | |
81105984 | 916 | int retval; |
0f64478c GKH |
917 | unsigned char *data ; |
918 | struct usb_serial_port *port; | |
81105984 | 919 | int status = urb->status; |
0f64478c | 920 | |
81105984 | 921 | if (status) { |
9eecf808 | 922 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
923 | return; |
924 | } | |
925 | ||
b69578df | 926 | port = urb->context; |
0f64478c | 927 | |
9eecf808 | 928 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
929 | |
930 | data = urb->transfer_buffer; | |
931 | ||
2e124b4a | 932 | if (urb->actual_length) { |
05c7cd39 | 933 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 934 | tty_flip_buffer_push(&port->port); |
0f64478c GKH |
935 | } |
936 | ||
0f64478c | 937 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
938 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
939 | if (retval) | |
9eecf808 | 940 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
941 | } |
942 | } | |
943 | ||
944 | /* | |
945 | * mos7720_bulk_out_data_callback | |
946 | * this is the callback function for when we have finished sending serial | |
947 | * data on the bulk out endpoint. | |
948 | */ | |
949 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
950 | { | |
951 | struct moschip_port *mos7720_port; | |
81105984 | 952 | int status = urb->status; |
0f64478c | 953 | |
81105984 | 954 | if (status) { |
9eecf808 | 955 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
956 | return; |
957 | } | |
958 | ||
959 | mos7720_port = urb->context; | |
960 | if (!mos7720_port) { | |
9eecf808 | 961 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
962 | return ; |
963 | } | |
964 | ||
6aad04f2 JS |
965 | if (mos7720_port->open) |
966 | tty_port_tty_wakeup(&mos7720_port->port->port); | |
0f64478c GKH |
967 | } |
968 | ||
fb088e33 MD |
969 | /* |
970 | * mos77xx_probe | |
971 | * this function installs the appropriate read interrupt endpoint callback | |
972 | * depending on whether the device is a 7720 or 7715, thus avoiding costly | |
973 | * run-time checks in the high-frequency callback routine itself. | |
974 | */ | |
975 | static int mos77xx_probe(struct usb_serial *serial, | |
976 | const struct usb_device_id *id) | |
977 | { | |
978 | if (id->idProduct == MOSCHIP_DEVICE_ID_7715) | |
979 | moschip7720_2port_driver.read_int_callback = | |
980 | mos7715_interrupt_callback; | |
981 | else | |
982 | moschip7720_2port_driver.read_int_callback = | |
983 | mos7720_interrupt_callback; | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
988 | static int mos77xx_calc_num_ports(struct usb_serial *serial) | |
989 | { | |
990 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
991 | if (product == MOSCHIP_DEVICE_ID_7715) | |
992 | return 1; | |
993 | ||
994 | return 2; | |
995 | } | |
996 | ||
a509a7e4 | 997 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
998 | { |
999 | struct usb_serial *serial; | |
0f64478c | 1000 | struct urb *urb; |
0f64478c GKH |
1001 | struct moschip_port *mos7720_port; |
1002 | int response; | |
1003 | int port_number; | |
63b91767 | 1004 | __u8 data; |
fe4b65ec | 1005 | int allocated_urbs = 0; |
0f64478c GKH |
1006 | int j; |
1007 | ||
1008 | serial = port->serial; | |
1009 | ||
1010 | mos7720_port = usb_get_serial_port_data(port); | |
1011 | if (mos7720_port == NULL) | |
1012 | return -ENODEV; | |
1013 | ||
0f64478c GKH |
1014 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
1015 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
1016 | ||
1017 | /* Initialising the write urb pool */ | |
1018 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 1019 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c GKH |
1020 | mos7720_port->write_urb_pool[j] = urb; |
1021 | ||
1022 | if (urb == NULL) { | |
194343d9 | 1023 | dev_err(&port->dev, "No more urbs???\n"); |
0f64478c GKH |
1024 | continue; |
1025 | } | |
1026 | ||
1027 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1028 | GFP_KERNEL); | |
1029 | if (!urb->transfer_buffer) { | |
194343d9 GKH |
1030 | dev_err(&port->dev, |
1031 | "%s-out of memory for urb buffers.\n", | |
1032 | __func__); | |
fe4b65ec ON |
1033 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1034 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1035 | continue; |
1036 | } | |
fe4b65ec | 1037 | allocated_urbs++; |
0f64478c GKH |
1038 | } |
1039 | ||
fe4b65ec ON |
1040 | if (!allocated_urbs) |
1041 | return -ENOMEM; | |
1042 | ||
0f64478c GKH |
1043 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1044 | * | |
1045 | * Register Index | |
2f9ea55c | 1046 | * 0 : THR/RHR |
0f64478c GKH |
1047 | * 1 : IER |
1048 | * 2 : FCR | |
1049 | * 3 : LCR | |
1050 | * 4 : MCR | |
2f9ea55c KS |
1051 | * 5 : LSR |
1052 | * 6 : MSR | |
1053 | * 7 : SPR | |
0f64478c GKH |
1054 | * |
1055 | * 0x08 : SP1/2 Control Reg | |
1056 | */ | |
1143832e | 1057 | port_number = port->port_number; |
63b91767 MD |
1058 | read_mos_reg(serial, port_number, LSR, &data); |
1059 | ||
9eecf808 | 1060 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1061 | |
63b91767 MD |
1062 | write_mos_reg(serial, dummy, SP1_REG, 0x02); |
1063 | write_mos_reg(serial, dummy, SP2_REG, 0x02); | |
0f64478c | 1064 | |
63b91767 MD |
1065 | write_mos_reg(serial, port_number, IER, 0x00); |
1066 | write_mos_reg(serial, port_number, FCR, 0x00); | |
0f64478c | 1067 | |
63b91767 MD |
1068 | write_mos_reg(serial, port_number, FCR, 0xcf); |
1069 | mos7720_port->shadowLCR = 0x03; | |
1070 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1071 | mos7720_port->shadowMCR = 0x0b; | |
1072 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1073 | |
63b91767 MD |
1074 | write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
1075 | read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); | |
1143832e | 1076 | data = data | (port->port_number + 1); |
63b91767 MD |
1077 | write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
1078 | mos7720_port->shadowLCR = 0x83; | |
1079 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1080 | write_mos_reg(serial, port_number, THR, 0x0c); | |
1081 | write_mos_reg(serial, port_number, IER, 0x00); | |
1082 | mos7720_port->shadowLCR = 0x03; | |
1083 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1084 | write_mos_reg(serial, port_number, IER, 0x0c); | |
0f64478c | 1085 | |
0f64478c GKH |
1086 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1087 | if (response) | |
4da1a17d AC |
1088 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1089 | __func__, response); | |
0f64478c | 1090 | |
0f64478c GKH |
1091 | /* initialize our port settings */ |
1092 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1093 | ||
1094 | /* send a open port command */ | |
1095 | mos7720_port->open = 1; | |
1096 | ||
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * mos7720_chars_in_buffer | |
1102 | * this function is called by the tty driver when it wants to know how many | |
1103 | * bytes of data we currently have outstanding in the port (data that has | |
1104 | * been written, but hasn't made it out the port yet) | |
1105 | * If successful, we return the number of bytes left to be written in the | |
1106 | * system, | |
1107 | * Otherwise we return a negative error number. | |
1108 | */ | |
95da310e | 1109 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1110 | { |
95da310e | 1111 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1112 | int i; |
1113 | int chars = 0; | |
1114 | struct moschip_port *mos7720_port; | |
1115 | ||
0f64478c | 1116 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1117 | if (mos7720_port == NULL) |
23198fda | 1118 | return 0; |
0f64478c GKH |
1119 | |
1120 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1121 | if (mos7720_port->write_urb_pool[i] && |
1122 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1123 | chars += URB_TRANSFER_BUFFER_SIZE; |
1124 | } | |
9eecf808 | 1125 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0f64478c GKH |
1126 | return chars; |
1127 | } | |
1128 | ||
335f8514 | 1129 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1130 | { |
1131 | struct usb_serial *serial; | |
1132 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1133 | int j; |
1134 | ||
0f64478c GKH |
1135 | serial = port->serial; |
1136 | ||
1137 | mos7720_port = usb_get_serial_port_data(port); | |
1138 | if (mos7720_port == NULL) | |
1139 | return; | |
1140 | ||
1141 | for (j = 0; j < NUM_URBS; ++j) | |
1142 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1143 | ||
1144 | /* Freeing Write URBs */ | |
1145 | for (j = 0; j < NUM_URBS; ++j) { | |
1146 | if (mos7720_port->write_urb_pool[j]) { | |
1147 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1148 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 | 1153 | * and interrupt read if they exists, otherwise nop */ |
a1cd7e99 | 1154 | usb_kill_urb(port->write_urb); |
a1cd7e99 ON |
1155 | usb_kill_urb(port->read_urb); |
1156 | ||
1143832e GKH |
1157 | write_mos_reg(serial, port->port_number, MCR, 0x00); |
1158 | write_mos_reg(serial, port->port_number, IER, 0x00); | |
cf41aa9e | 1159 | |
0f64478c | 1160 | mos7720_port->open = 0; |
0f64478c GKH |
1161 | } |
1162 | ||
95da310e | 1163 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1164 | { |
95da310e | 1165 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1166 | unsigned char data; |
0f64478c GKH |
1167 | struct usb_serial *serial; |
1168 | struct moschip_port *mos7720_port; | |
1169 | ||
0f64478c GKH |
1170 | serial = port->serial; |
1171 | ||
1172 | mos7720_port = usb_get_serial_port_data(port); | |
1173 | if (mos7720_port == NULL) | |
1174 | return; | |
1175 | ||
1176 | if (break_state == -1) | |
1177 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1178 | else | |
1179 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1180 | ||
1181 | mos7720_port->shadowLCR = data; | |
1143832e | 1182 | write_mos_reg(serial, port->port_number, LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1183 | } |
1184 | ||
1185 | /* | |
1186 | * mos7720_write_room | |
1187 | * this function is called by the tty driver when it wants to know how many | |
1188 | * bytes of data we can accept for a specific port. | |
1189 | * If successful, we return the amount of room that we have for this port | |
1190 | * Otherwise we return a negative error number. | |
1191 | */ | |
95da310e | 1192 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1193 | { |
95da310e | 1194 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1195 | struct moschip_port *mos7720_port; |
1196 | int room = 0; | |
1197 | int i; | |
1198 | ||
0f64478c | 1199 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1200 | if (mos7720_port == NULL) |
0f64478c | 1201 | return -ENODEV; |
0f64478c | 1202 | |
a5b6f60c | 1203 | /* FIXME: Locking */ |
0f64478c | 1204 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1205 | if (mos7720_port->write_urb_pool[i] && |
1206 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1207 | room += URB_TRANSFER_BUFFER_SIZE; |
1208 | } | |
1209 | ||
9eecf808 | 1210 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1211 | return room; |
1212 | } | |
1213 | ||
95da310e AC |
1214 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1215 | const unsigned char *data, int count) | |
0f64478c GKH |
1216 | { |
1217 | int status; | |
1218 | int i; | |
1219 | int bytes_sent = 0; | |
1220 | int transfer_size; | |
1221 | ||
1222 | struct moschip_port *mos7720_port; | |
1223 | struct usb_serial *serial; | |
1224 | struct urb *urb; | |
1225 | const unsigned char *current_position = data; | |
1226 | ||
0f64478c GKH |
1227 | serial = port->serial; |
1228 | ||
1229 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1230 | if (mos7720_port == NULL) |
0f64478c | 1231 | return -ENODEV; |
0f64478c GKH |
1232 | |
1233 | /* try to find a free urb in the list */ | |
1234 | urb = NULL; | |
1235 | ||
1236 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1237 | if (mos7720_port->write_urb_pool[i] && |
1238 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1239 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1240 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1241 | break; |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (urb == NULL) { | |
9eecf808 | 1246 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1247 | goto exit; |
1248 | } | |
1249 | ||
1250 | if (urb->transfer_buffer == NULL) { | |
1251 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1252 | GFP_KERNEL); | |
1253 | if (urb->transfer_buffer == NULL) { | |
22a416c4 | 1254 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1255 | __func__); |
0f64478c GKH |
1256 | goto exit; |
1257 | } | |
1258 | } | |
4da1a17d | 1259 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1260 | |
1261 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1262 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1263 | urb->transfer_buffer); |
1264 | ||
1265 | /* fill urb with data and submit */ | |
1266 | usb_fill_bulk_urb(urb, serial->dev, | |
1267 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1268 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1269 | urb->transfer_buffer, transfer_size, |
1270 | mos7720_bulk_out_data_callback, mos7720_port); | |
1271 | ||
1272 | /* send it down the pipe */ | |
4da1a17d | 1273 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1274 | if (status) { |
22a416c4 | 1275 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1276 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1277 | bytes_sent = status; |
1278 | goto exit; | |
1279 | } | |
1280 | bytes_sent = transfer_size; | |
1281 | ||
1282 | exit: | |
1283 | return bytes_sent; | |
1284 | } | |
1285 | ||
95da310e | 1286 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1287 | { |
95da310e | 1288 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1289 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1290 | int status; |
1291 | ||
0f64478c GKH |
1292 | mos7720_port = usb_get_serial_port_data(port); |
1293 | ||
1294 | if (mos7720_port == NULL) | |
1295 | return; | |
1296 | ||
1297 | if (!mos7720_port->open) { | |
9eecf808 | 1298 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1299 | return; |
1300 | } | |
1301 | ||
0f64478c GKH |
1302 | /* if we are implementing XON/XOFF, send the stop character */ |
1303 | if (I_IXOFF(tty)) { | |
1304 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1305 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1306 | if (status <= 0) |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1311 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1312 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
1143832e GKH |
1313 | write_mos_reg(port->serial, port->port_number, MCR, |
1314 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1315 | if (status != 0) |
1316 | return; | |
1317 | } | |
1318 | } | |
1319 | ||
95da310e | 1320 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1321 | { |
95da310e | 1322 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1323 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1324 | int status; |
0f64478c GKH |
1325 | |
1326 | if (mos7720_port == NULL) | |
1327 | return; | |
1328 | ||
1329 | if (!mos7720_port->open) { | |
9eecf808 | 1330 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1331 | return; |
1332 | } | |
1333 | ||
0f64478c GKH |
1334 | /* if we are implementing XON/XOFF, send the start character */ |
1335 | if (I_IXOFF(tty)) { | |
1336 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1337 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1338 | if (status <= 0) |
1339 | return; | |
1340 | } | |
1341 | ||
1342 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1343 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1344 | mos7720_port->shadowMCR |= UART_MCR_RTS; |
1143832e GKH |
1345 | write_mos_reg(port->serial, port->port_number, MCR, |
1346 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1347 | if (status != 0) |
1348 | return; | |
1349 | } | |
1350 | } | |
1351 | ||
b69578df | 1352 | /* FIXME: this function does not work */ |
0f64478c GKH |
1353 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1354 | unsigned int baud) | |
1355 | { | |
0f64478c GKH |
1356 | struct usb_serial_port *port; |
1357 | struct usb_serial *serial; | |
1358 | int port_number; | |
63b91767 | 1359 | enum mos_regs sp_reg; |
0f64478c GKH |
1360 | if (mos7720_port == NULL) |
1361 | return -EINVAL; | |
1362 | ||
1363 | port = mos7720_port->port; | |
1364 | serial = port->serial; | |
1365 | ||
4da1a17d AC |
1366 | /*********************************************** |
1367 | * Init Sequence for higher rates | |
1368 | ***********************************************/ | |
9eecf808 | 1369 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
1143832e | 1370 | port_number = port->port_number; |
0f64478c | 1371 | |
63b91767 MD |
1372 | write_mos_reg(serial, port_number, IER, 0x00); |
1373 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1374 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
1375 | mos7720_port->shadowMCR = 0x0b; | |
1376 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
1377 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); | |
0f64478c | 1378 | |
4da1a17d AC |
1379 | /*********************************************** |
1380 | * Set for higher rates * | |
1381 | ***********************************************/ | |
b69578df | 1382 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 MD |
1383 | if (port_number == 0) |
1384 | sp_reg = SP1_REG; | |
1385 | else | |
1386 | sp_reg = SP2_REG; | |
1387 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); | |
1388 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); | |
1389 | mos7720_port->shadowMCR = 0x2b; | |
1390 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1391 | |
4da1a17d AC |
1392 | /*********************************************** |
1393 | * Set DLL/DLM | |
1394 | ***********************************************/ | |
63b91767 MD |
1395 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1396 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1397 | write_mos_reg(serial, port_number, DLL, 0x01); | |
1398 | write_mos_reg(serial, port_number, DLM, 0x00); | |
1399 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1400 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1401 | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /* baud rate information */ | |
4da1a17d | 1406 | struct divisor_table_entry { |
0f64478c GKH |
1407 | __u32 baudrate; |
1408 | __u16 divisor; | |
1409 | }; | |
1410 | ||
1411 | /* Define table of divisors for moschip 7720 hardware * | |
1412 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1413 | * MCR.7 = 0. */ | |
1414 | static struct divisor_table_entry divisor_table[] = { | |
1415 | { 50, 2304}, | |
1416 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1417 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1418 | { 150, 768}, | |
1419 | { 300, 384}, | |
1420 | { 600, 192}, | |
1421 | { 1200, 96}, | |
1422 | { 1800, 64}, | |
1423 | { 2400, 48}, | |
1424 | { 4800, 24}, | |
1425 | { 7200, 16}, | |
1426 | { 9600, 12}, | |
1427 | { 19200, 6}, | |
1428 | { 38400, 3}, | |
1429 | { 57600, 2}, | |
1430 | { 115200, 1}, | |
1431 | }; | |
1432 | ||
1433 | /***************************************************************************** | |
1434 | * calc_baud_rate_divisor | |
1435 | * this function calculates the proper baud rate divisor for the specified | |
1436 | * baud rate. | |
1437 | *****************************************************************************/ | |
9eecf808 | 1438 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1439 | { |
1440 | int i; | |
1441 | __u16 custom; | |
1442 | __u16 round1; | |
1443 | __u16 round; | |
1444 | ||
1445 | ||
9eecf808 | 1446 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1447 | |
1448 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1449 | if (divisor_table[i].baudrate == baudrate) { | |
1450 | *divisor = divisor_table[i].divisor; | |
1451 | return 0; | |
1452 | } | |
1453 | } | |
1454 | ||
4da1a17d AC |
1455 | /* After trying for all the standard baud rates * |
1456 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1457 | if (baudrate > 75 && baudrate < 230400) { |
1458 | /* get the divisor */ | |
1459 | custom = (__u16)(230400L / baudrate); | |
1460 | ||
1461 | /* Check for round off */ | |
1462 | round1 = (__u16)(2304000L / baudrate); | |
1463 | round = (__u16)(round1 - (custom * 10)); | |
1464 | if (round > 4) | |
1465 | custom++; | |
1466 | *divisor = custom; | |
1467 | ||
9eecf808 | 1468 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1469 | return 0; |
1470 | } | |
1471 | ||
9eecf808 | 1472 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1473 | return -EINVAL; |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * send_cmd_write_baud_rate | |
1478 | * this function sends the proper command to change the baud rate of the | |
1479 | * specified port. | |
1480 | */ | |
1481 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1482 | int baudrate) | |
1483 | { | |
1484 | struct usb_serial_port *port; | |
1485 | struct usb_serial *serial; | |
1486 | int divisor; | |
1487 | int status; | |
0f64478c GKH |
1488 | unsigned char number; |
1489 | ||
1490 | if (mos7720_port == NULL) | |
1491 | return -1; | |
1492 | ||
1493 | port = mos7720_port->port; | |
1494 | serial = port->serial; | |
1495 | ||
1143832e | 1496 | number = port->port_number; |
9eecf808 | 1497 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1498 | |
4da1a17d | 1499 | /* Calculate the Divisor */ |
9eecf808 | 1500 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1501 | if (status) { |
194343d9 | 1502 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1503 | return status; |
1504 | } | |
1505 | ||
4da1a17d | 1506 | /* Enable access to divisor latch */ |
63b91767 MD |
1507 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1508 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1509 | |
1510 | /* Write the divisor */ | |
63b91767 MD |
1511 | write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
1512 | write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1513 | |
4da1a17d | 1514 | /* Disable access to divisor latch */ |
63b91767 MD |
1515 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
1516 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1517 | |
1518 | return status; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * change_port_settings | |
1523 | * This routine is called to set the UART on the device to match | |
1524 | * the specified new settings. | |
1525 | */ | |
95da310e AC |
1526 | static void change_port_settings(struct tty_struct *tty, |
1527 | struct moschip_port *mos7720_port, | |
606d099c | 1528 | struct ktermios *old_termios) |
0f64478c GKH |
1529 | { |
1530 | struct usb_serial_port *port; | |
1531 | struct usb_serial *serial; | |
0f64478c GKH |
1532 | int baud; |
1533 | unsigned cflag; | |
1534 | unsigned iflag; | |
1535 | __u8 mask = 0xff; | |
1536 | __u8 lData; | |
1537 | __u8 lParity; | |
1538 | __u8 lStop; | |
1539 | int status; | |
1540 | int port_number; | |
0f64478c GKH |
1541 | |
1542 | if (mos7720_port == NULL) | |
1543 | return ; | |
1544 | ||
1545 | port = mos7720_port->port; | |
1546 | serial = port->serial; | |
1143832e | 1547 | port_number = port->port_number; |
0f64478c | 1548 | |
0f64478c | 1549 | if (!mos7720_port->open) { |
9eecf808 | 1550 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1551 | return; |
1552 | } | |
1553 | ||
0f64478c GKH |
1554 | lData = UART_LCR_WLEN8; |
1555 | lStop = 0x00; /* 1 stop bit */ | |
1556 | lParity = 0x00; /* No parity */ | |
1557 | ||
adc8d746 AC |
1558 | cflag = tty->termios.c_cflag; |
1559 | iflag = tty->termios.c_iflag; | |
0f64478c GKH |
1560 | |
1561 | /* Change the number of bits */ | |
1562 | switch (cflag & CSIZE) { | |
1563 | case CS5: | |
1564 | lData = UART_LCR_WLEN5; | |
1565 | mask = 0x1f; | |
1566 | break; | |
1567 | ||
1568 | case CS6: | |
1569 | lData = UART_LCR_WLEN6; | |
1570 | mask = 0x3f; | |
1571 | break; | |
1572 | ||
1573 | case CS7: | |
1574 | lData = UART_LCR_WLEN7; | |
1575 | mask = 0x7f; | |
1576 | break; | |
1577 | default: | |
1578 | case CS8: | |
1579 | lData = UART_LCR_WLEN8; | |
1580 | break; | |
1581 | } | |
1582 | ||
1583 | /* Change the Parity bit */ | |
1584 | if (cflag & PARENB) { | |
1585 | if (cflag & PARODD) { | |
1586 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1587 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1588 | } else { |
1589 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1590 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1591 | } |
1592 | ||
1593 | } else { | |
9eecf808 | 1594 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1595 | } |
1596 | ||
1597 | if (cflag & CMSPAR) | |
1598 | lParity = lParity | 0x20; | |
1599 | ||
1600 | /* Change the Stop bit */ | |
1601 | if (cflag & CSTOPB) { | |
1602 | lStop = UART_LCR_STOP; | |
9eecf808 | 1603 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1604 | } else { |
1605 | lStop = 0x00; | |
9eecf808 | 1606 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1607 | } |
1608 | ||
1609 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1610 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1611 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1612 | ||
1613 | /* Update the LCR with the correct value */ | |
4da1a17d | 1614 | mos7720_port->shadowLCR &= |
63b91767 | 1615 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1616 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1617 | ||
1618 | ||
1619 | /* Disable Interrupts */ | |
63b91767 MD |
1620 | write_mos_reg(serial, port_number, IER, 0x00); |
1621 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1622 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
0f64478c GKH |
1623 | |
1624 | /* Send the updated LCR value to the mos7720 */ | |
63b91767 MD |
1625 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
1626 | mos7720_port->shadowMCR = 0x0b; | |
1627 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1628 | |
1629 | /* set up the MCR register and send it to the mos7720 */ | |
1630 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1631 | if (cflag & CBAUD) | |
1632 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1633 | ||
1634 | if (cflag & CRTSCTS) { | |
1635 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1636 | /* To set hardware flow control to the specified * |
1637 | * serial port, in SP1/2_CONTROL_REG */ | |
a26f009a | 1638 | if (port_number) |
63b91767 MD |
1639 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); |
1640 | else | |
1641 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); | |
1642 | ||
1643 | } else | |
0f64478c | 1644 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1645 | |
63b91767 | 1646 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
0f64478c GKH |
1647 | |
1648 | /* Determine divisor based on baud rate */ | |
1649 | baud = tty_get_baud_rate(tty); | |
1650 | if (!baud) { | |
1651 | /* pick a default, any default... */ | |
9eecf808 | 1652 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1653 | baud = 9600; |
1654 | } | |
1655 | ||
1656 | if (baud >= 230400) { | |
1657 | set_higher_rates(mos7720_port, baud); | |
1658 | /* Enable Interrupts */ | |
63b91767 | 1659 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1660 | return; |
1661 | } | |
1662 | ||
9eecf808 | 1663 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1664 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1665 | /* FIXME: needs to write actual resulting baud back not just |
1666 | blindly do so */ | |
1667 | if (cflag & CBAUD) | |
1668 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1669 | /* Enable Interrupts */ |
63b91767 | 1670 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1671 | |
1672 | if (port->read_urb->status != -EINPROGRESS) { | |
0f64478c GKH |
1673 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1674 | if (status) | |
9eecf808 | 1675 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1676 | } |
0f64478c GKH |
1677 | } |
1678 | ||
1679 | /* | |
1680 | * mos7720_set_termios | |
1681 | * this function is called by the tty driver when it wants to change the | |
1682 | * termios structure. | |
1683 | */ | |
95da310e AC |
1684 | static void mos7720_set_termios(struct tty_struct *tty, |
1685 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1686 | { |
1687 | int status; | |
1688 | unsigned int cflag; | |
1689 | struct usb_serial *serial; | |
1690 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1691 | |
1692 | serial = port->serial; | |
1693 | ||
1694 | mos7720_port = usb_get_serial_port_data(port); | |
1695 | ||
1696 | if (mos7720_port == NULL) | |
1697 | return; | |
1698 | ||
0f64478c | 1699 | if (!mos7720_port->open) { |
9eecf808 | 1700 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1701 | return; |
1702 | } | |
1703 | ||
9eecf808 | 1704 | dev_dbg(&port->dev, "setting termios - ASPIRE\n"); |
0f64478c | 1705 | |
adc8d746 | 1706 | cflag = tty->termios.c_cflag; |
0f64478c | 1707 | |
9eecf808 | 1708 | dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__, |
d9a80746 | 1709 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
0f64478c | 1710 | |
9eecf808 GKH |
1711 | dev_dbg(&port->dev, "%s - old cflag %08x old iflag %08x\n", __func__, |
1712 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1713 | |
1714 | /* change the port settings to the new ones specified */ | |
95da310e | 1715 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1716 | |
4da1a17d | 1717 | if (port->read_urb->status != -EINPROGRESS) { |
0f64478c GKH |
1718 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1719 | if (status) | |
9eecf808 | 1720 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1721 | } |
0f64478c GKH |
1722 | } |
1723 | ||
1724 | /* | |
1725 | * get_lsr_info - get line status register info | |
1726 | * | |
1727 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1728 | * is emptied. On bus types like RS485, the transmitter must | |
1729 | * release the bus after transmitting. This must be done when | |
1730 | * the transmit shift register is empty, not be done when the | |
1731 | * transmit holding register is empty. This functionality | |
1732 | * allows an RS485 driver to be written in user space. | |
1733 | */ | |
4da1a17d AC |
1734 | static int get_lsr_info(struct tty_struct *tty, |
1735 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1736 | { |
2f9ea55c | 1737 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1738 | unsigned int result = 0; |
2f9ea55c | 1739 | unsigned char data = 0; |
1143832e | 1740 | int port_number = port->port_number; |
2f9ea55c | 1741 | int count; |
0f64478c | 1742 | |
95da310e | 1743 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1744 | if (count == 0) { |
63b91767 | 1745 | read_mos_reg(port->serial, port_number, LSR, &data); |
2f9ea55c KS |
1746 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1747 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1748 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1749 | result = TIOCSER_TEMT; |
1750 | } | |
0f64478c | 1751 | } |
0f64478c GKH |
1752 | if (copy_to_user(value, &result, sizeof(int))) |
1753 | return -EFAULT; | |
1754 | return 0; | |
1755 | } | |
1756 | ||
60b33c13 | 1757 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1758 | { |
1759 | struct usb_serial_port *port = tty->driver_data; | |
1760 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1761 | unsigned int result = 0; | |
1762 | unsigned int mcr ; | |
1763 | unsigned int msr ; | |
1764 | ||
0f608f89 KS |
1765 | mcr = mos7720_port->shadowMCR; |
1766 | msr = mos7720_port->shadowMSR; | |
1767 | ||
1768 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1769 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1770 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1771 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1772 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1773 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1774 | ||
0f608f89 KS |
1775 | return result; |
1776 | } | |
1777 | ||
20b9d177 | 1778 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1779 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1780 | { |
1781 | struct usb_serial_port *port = tty->driver_data; | |
1782 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1783 | unsigned int mcr ; | |
0f608f89 KS |
1784 | |
1785 | mcr = mos7720_port->shadowMCR; | |
1786 | ||
1787 | if (set & TIOCM_RTS) | |
1788 | mcr |= UART_MCR_RTS; | |
1789 | if (set & TIOCM_DTR) | |
1790 | mcr |= UART_MCR_DTR; | |
1791 | if (set & TIOCM_LOOP) | |
1792 | mcr |= UART_MCR_LOOP; | |
1793 | ||
1794 | if (clear & TIOCM_RTS) | |
1795 | mcr &= ~UART_MCR_RTS; | |
1796 | if (clear & TIOCM_DTR) | |
1797 | mcr &= ~UART_MCR_DTR; | |
1798 | if (clear & TIOCM_LOOP) | |
1799 | mcr &= ~UART_MCR_LOOP; | |
1800 | ||
1801 | mos7720_port->shadowMCR = mcr; | |
1143832e GKH |
1802 | write_mos_reg(port->serial, port->port_number, MCR, |
1803 | mos7720_port->shadowMCR); | |
0f608f89 KS |
1804 | |
1805 | return 0; | |
1806 | } | |
1807 | ||
0f64478c GKH |
1808 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1809 | unsigned int __user *value) | |
1810 | { | |
0bca1b91 | 1811 | unsigned int mcr; |
0f64478c | 1812 | unsigned int arg; |
0f64478c GKH |
1813 | |
1814 | struct usb_serial_port *port; | |
1815 | ||
1816 | if (mos7720_port == NULL) | |
1817 | return -1; | |
1818 | ||
4da1a17d | 1819 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1820 | mcr = mos7720_port->shadowMCR; |
1821 | ||
1822 | if (copy_from_user(&arg, value, sizeof(int))) | |
1823 | return -EFAULT; | |
1824 | ||
1825 | switch (cmd) { | |
1826 | case TIOCMBIS: | |
1827 | if (arg & TIOCM_RTS) | |
1828 | mcr |= UART_MCR_RTS; | |
1829 | if (arg & TIOCM_DTR) | |
1830 | mcr |= UART_MCR_RTS; | |
1831 | if (arg & TIOCM_LOOP) | |
1832 | mcr |= UART_MCR_LOOP; | |
1833 | break; | |
1834 | ||
1835 | case TIOCMBIC: | |
1836 | if (arg & TIOCM_RTS) | |
1837 | mcr &= ~UART_MCR_RTS; | |
1838 | if (arg & TIOCM_DTR) | |
1839 | mcr &= ~UART_MCR_RTS; | |
1840 | if (arg & TIOCM_LOOP) | |
1841 | mcr &= ~UART_MCR_LOOP; | |
1842 | break; | |
1843 | ||
0f64478c GKH |
1844 | } |
1845 | ||
1846 | mos7720_port->shadowMCR = mcr; | |
1143832e GKH |
1847 | write_mos_reg(port->serial, port->port_number, MCR, |
1848 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1849 | |
1850 | return 0; | |
1851 | } | |
1852 | ||
0f64478c GKH |
1853 | static int get_serial_info(struct moschip_port *mos7720_port, |
1854 | struct serial_struct __user *retinfo) | |
1855 | { | |
1856 | struct serial_struct tmp; | |
1857 | ||
1858 | if (!retinfo) | |
1859 | return -EFAULT; | |
1860 | ||
1861 | memset(&tmp, 0, sizeof(tmp)); | |
1862 | ||
1863 | tmp.type = PORT_16550A; | |
e5b1e206 | 1864 | tmp.line = mos7720_port->port->minor; |
1143832e | 1865 | tmp.port = mos7720_port->port->port_number; |
0f64478c GKH |
1866 | tmp.irq = 0; |
1867 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1868 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1869 | tmp.baud_base = 9600; |
1870 | tmp.close_delay = 5*HZ; | |
1871 | tmp.closing_wait = 30*HZ; | |
1872 | ||
1873 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1874 | return -EFAULT; | |
1875 | return 0; | |
1876 | } | |
1877 | ||
00a0d0d6 | 1878 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1879 | unsigned int cmd, unsigned long arg) |
1880 | { | |
95da310e | 1881 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1882 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1883 | |
1884 | mos7720_port = usb_get_serial_port_data(port); | |
1885 | if (mos7720_port == NULL) | |
1886 | return -ENODEV; | |
1887 | ||
9eecf808 | 1888 | dev_dbg(&port->dev, "%s - cmd = 0x%x", __func__, cmd); |
0f64478c GKH |
1889 | |
1890 | switch (cmd) { | |
0f64478c | 1891 | case TIOCSERGETLSR: |
9eecf808 | 1892 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1893 | return get_lsr_info(tty, mos7720_port, |
1894 | (unsigned int __user *)arg); | |
0f64478c | 1895 | |
95da310e | 1896 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1897 | case TIOCMBIS: |
1898 | case TIOCMBIC: | |
9eecf808 | 1899 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1900 | return set_modem_info(mos7720_port, cmd, |
1901 | (unsigned int __user *)arg); | |
1902 | ||
0f64478c | 1903 | case TIOCGSERIAL: |
9eecf808 | 1904 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1905 | return get_serial_info(mos7720_port, |
1906 | (struct serial_struct __user *)arg); | |
0f64478c GKH |
1907 | } |
1908 | ||
1909 | return -ENOIOCTLCMD; | |
1910 | } | |
1911 | ||
1912 | static int mos7720_startup(struct usb_serial *serial) | |
1913 | { | |
0f64478c | 1914 | struct usb_device *dev; |
0f64478c | 1915 | char data; |
91f58ae6 | 1916 | u16 product; |
b69578df | 1917 | int ret_val; |
0f64478c | 1918 | |
91f58ae6 | 1919 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
1920 | dev = serial->dev; |
1921 | ||
fb088e33 MD |
1922 | /* |
1923 | * The 7715 uses the first bulk in/out endpoint pair for the parallel | |
1924 | * port, and the second for the serial port. Because the usbserial core | |
1925 | * assumes both pairs are serial ports, we must engage in a bit of | |
1926 | * subterfuge and swap the pointers for ports 0 and 1 in order to make | |
1927 | * port 0 point to the serial port. However, both moschip devices use a | |
1928 | * single interrupt-in endpoint for both ports (as mentioned a little | |
1929 | * further down), and this endpoint was assigned to port 0. So after | |
1930 | * the swap, we must copy the interrupt endpoint elements from port 1 | |
1931 | * (as newly assigned) to port 0, and null out port 1 pointers. | |
1932 | */ | |
1933 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1934 | struct usb_serial_port *tmp = serial->port[0]; | |
1935 | serial->port[0] = serial->port[1]; | |
1936 | serial->port[1] = tmp; | |
1937 | serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; | |
1938 | serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; | |
1939 | serial->port[0]->interrupt_in_endpointAddress = | |
1940 | tmp->interrupt_in_endpointAddress; | |
1941 | serial->port[1]->interrupt_in_urb = NULL; | |
1942 | serial->port[1]->interrupt_in_buffer = NULL; | |
1943 | } | |
1944 | ||
0f64478c GKH |
1945 | /* setting configuration feature to one */ |
1946 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
849513a7 | 1947 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
0f64478c | 1948 | |
b69578df MD |
1949 | /* start the interrupt urb */ |
1950 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
1951 | if (ret_val) | |
1952 | dev_err(&dev->dev, | |
1953 | "%s - Error %d submitting control urb\n", | |
1954 | __func__, ret_val); | |
1955 | ||
1956 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
1957 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1958 | ret_val = mos7715_parport_init(serial); | |
1959 | if (ret_val < 0) | |
1960 | return ret_val; | |
1961 | } | |
1962 | #endif | |
4da1a17d | 1963 | /* LSR For Port 1 */ |
63b91767 | 1964 | read_mos_reg(serial, 0, LSR, &data); |
9eecf808 | 1965 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
1966 | |
1967 | return 0; | |
1968 | } | |
1969 | ||
f9c99bb8 | 1970 | static void mos7720_release(struct usb_serial *serial) |
0f64478c | 1971 | { |
b69578df MD |
1972 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1973 | /* close the parallel port */ | |
1974 | ||
1975 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
1976 | == MOSCHIP_DEVICE_ID_7715) { | |
1977 | struct urbtracker *urbtrack; | |
1978 | unsigned long flags; | |
1979 | struct mos7715_parport *mos_parport = | |
1980 | usb_get_serial_data(serial); | |
1981 | ||
1982 | /* prevent NULL ptr dereference in port callbacks */ | |
1983 | spin_lock(&release_lock); | |
1984 | mos_parport->pp->private_data = NULL; | |
1985 | spin_unlock(&release_lock); | |
1986 | ||
1987 | /* wait for synchronous usb calls to return */ | |
1988 | if (mos_parport->msg_pending) | |
1989 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
849513a7 | 1990 | msecs_to_jiffies(MOS_WDR_TIMEOUT)); |
b69578df MD |
1991 | |
1992 | parport_remove_port(mos_parport->pp); | |
1993 | usb_set_serial_data(serial, NULL); | |
1994 | mos_parport->serial = NULL; | |
1995 | ||
1996 | /* if tasklet currently scheduled, wait for it to complete */ | |
1997 | tasklet_kill(&mos_parport->urb_tasklet); | |
1998 | ||
1999 | /* unlink any urbs sent by the tasklet */ | |
2000 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
2001 | list_for_each_entry(urbtrack, | |
2002 | &mos_parport->active_urbs, | |
2003 | urblist_entry) | |
2004 | usb_unlink_urb(urbtrack->urb); | |
2005 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
2006 | ||
2007 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
2008 | } | |
2009 | #endif | |
4230af57 JH |
2010 | } |
2011 | ||
2012 | static int mos7720_port_probe(struct usb_serial_port *port) | |
2013 | { | |
2014 | struct moschip_port *mos7720_port; | |
2015 | ||
2016 | mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); | |
2017 | if (!mos7720_port) | |
2018 | return -ENOMEM; | |
2019 | ||
2020 | /* Initialize all port interrupt end point to port 0 int endpoint. | |
2021 | * Our device has only one interrupt endpoint common to all ports. | |
2022 | */ | |
2023 | port->interrupt_in_endpointAddress = | |
2024 | port->serial->port[0]->interrupt_in_endpointAddress; | |
2025 | mos7720_port->port = port; | |
2026 | ||
2027 | usb_set_serial_port_data(port, mos7720_port); | |
2028 | ||
2029 | return 0; | |
2030 | } | |
2031 | ||
2032 | static int mos7720_port_remove(struct usb_serial_port *port) | |
2033 | { | |
2034 | struct moschip_port *mos7720_port; | |
2035 | ||
2036 | mos7720_port = usb_get_serial_port_data(port); | |
2037 | kfree(mos7720_port); | |
2038 | ||
2039 | return 0; | |
0f64478c GKH |
2040 | } |
2041 | ||
2042 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2043 | .driver = { | |
2044 | .owner = THIS_MODULE, | |
2045 | .name = "moschip7720", | |
2046 | }, | |
2047 | .description = "Moschip 2 port adapter", | |
68e24113 | 2048 | .id_table = id_table, |
fb088e33 | 2049 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2050 | .open = mos7720_open, |
2051 | .close = mos7720_close, | |
2052 | .throttle = mos7720_throttle, | |
2053 | .unthrottle = mos7720_unthrottle, | |
fb088e33 | 2054 | .probe = mos77xx_probe, |
0f64478c | 2055 | .attach = mos7720_startup, |
f9c99bb8 | 2056 | .release = mos7720_release, |
4230af57 JH |
2057 | .port_probe = mos7720_port_probe, |
2058 | .port_remove = mos7720_port_remove, | |
0f64478c | 2059 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2060 | .tiocmget = mos7720_tiocmget, |
2061 | .tiocmset = mos7720_tiocmset, | |
0f64478c GKH |
2062 | .set_termios = mos7720_set_termios, |
2063 | .write = mos7720_write, | |
2064 | .write_room = mos7720_write_room, | |
2065 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2066 | .break_ctl = mos7720_break, | |
2067 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fb088e33 | 2068 | .read_int_callback = NULL /* dynamically assigned in probe() */ |
0f64478c GKH |
2069 | }; |
2070 | ||
4d2a7aff AS |
2071 | static struct usb_serial_driver * const serial_drivers[] = { |
2072 | &moschip7720_2port_driver, NULL | |
2073 | }; | |
2074 | ||
68e24113 | 2075 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2076 | |
4da1a17d AC |
2077 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2078 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c | 2079 | MODULE_LICENSE("GPL"); |