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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 GKH |
38 | |
39 | /* | |
40 | * Version Information | |
41 | */ | |
63b91767 | 42 | #define DRIVER_VERSION "2.1" |
0f64478c GKH |
43 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
44 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
45 | ||
46 | /* default urb timeout */ | |
47 | #define MOS_WDR_TIMEOUT (HZ * 5) | |
48 | ||
0f64478c GKH |
49 | #define MOS_MAX_PORT 0x02 |
50 | #define MOS_WRITE 0x0E | |
51 | #define MOS_READ 0x0D | |
52 | ||
53 | /* Interrupt Rotinue Defines */ | |
54 | #define SERIAL_IIR_RLS 0x06 | |
55 | #define SERIAL_IIR_RDA 0x04 | |
56 | #define SERIAL_IIR_CTI 0x0c | |
57 | #define SERIAL_IIR_THR 0x02 | |
58 | #define SERIAL_IIR_MS 0x00 | |
59 | ||
60 | #define NUM_URBS 16 /* URB Count */ | |
61 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
62 | ||
b69578df | 63 | /* This structure holds all of the local serial port information */ |
4da1a17d | 64 | struct moschip_port { |
0f64478c GKH |
65 | __u8 shadowLCR; /* last LCR value received */ |
66 | __u8 shadowMCR; /* last MCR value received */ | |
67 | __u8 shadowMSR; /* last MSR value received */ | |
68 | char open; | |
69 | struct async_icount icount; | |
70 | struct usb_serial_port *port; /* loop back to the owner */ | |
71 | struct urb *write_urb_pool[NUM_URBS]; | |
72 | }; | |
73 | ||
90ab5ee9 | 74 | static bool debug; |
0f64478c | 75 | |
fb088e33 MD |
76 | static struct usb_serial_driver moschip7720_2port_driver; |
77 | ||
0f64478c GKH |
78 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
79 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
80 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
81 | ||
7d40d7e8 | 82 | static const struct usb_device_id moschip_port_id_table[] = { |
4da1a17d | 83 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 84 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
85 | { } /* terminating entry */ |
86 | }; | |
87 | MODULE_DEVICE_TABLE(usb, moschip_port_id_table); | |
88 | ||
b69578df MD |
89 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
90 | ||
91 | /* initial values for parport regs */ | |
92 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
93 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
94 | ||
95 | struct urbtracker { | |
96 | struct mos7715_parport *mos_parport; | |
97 | struct list_head urblist_entry; | |
98 | struct kref ref_count; | |
99 | struct urb *urb; | |
100 | }; | |
101 | ||
102 | enum mos7715_pp_modes { | |
103 | SPP = 0<<5, | |
104 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
105 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
106 | }; | |
107 | ||
108 | struct mos7715_parport { | |
109 | struct parport *pp; /* back to containing struct */ | |
110 | struct kref ref_count; /* to instance of this struct */ | |
111 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
112 | struct list_head active_urbs; /* list async urbs in flight */ | |
113 | spinlock_t listlock; /* protects list access */ | |
114 | bool msg_pending; /* usb sync call pending */ | |
115 | struct completion syncmsg_compl; /* usb sync call completed */ | |
116 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
117 | struct usb_serial *serial; /* back to containing struct */ | |
118 | __u8 shadowECR; /* parallel port regs... */ | |
119 | __u8 shadowDCR; | |
120 | atomic_t shadowDSR; /* updated in int-in callback */ | |
121 | }; | |
122 | ||
123 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
124 | static DEFINE_SPINLOCK(release_lock); | |
125 | ||
63b91767 MD |
126 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
127 | ||
128 | static const unsigned int dummy; /* for clarity in register access fns */ | |
129 | ||
b69578df MD |
130 | enum mos_regs { |
131 | THR, /* serial port regs */ | |
132 | RHR, | |
133 | IER, | |
134 | FCR, | |
135 | ISR, | |
136 | LCR, | |
137 | MCR, | |
138 | LSR, | |
139 | MSR, | |
140 | SPR, | |
141 | DLL, | |
142 | DLM, | |
143 | DPR, /* parallel port regs */ | |
144 | DSR, | |
145 | DCR, | |
146 | ECR, | |
147 | SP1_REG, /* device control regs */ | |
148 | SP2_REG, /* serial port 2 (7720 only) */ | |
149 | PP_REG, | |
150 | SP_CONTROL_REG, | |
151 | }; | |
152 | ||
153 | /* | |
154 | * Return the correct value for the Windex field of the setup packet | |
155 | * for a control endpoint message. See the 7715 datasheet. | |
156 | */ | |
157 | static inline __u16 get_reg_index(enum mos_regs reg) | |
158 | { | |
159 | static const __u16 mos7715_index_lookup_table[] = { | |
160 | 0x00, /* THR */ | |
161 | 0x00, /* RHR */ | |
162 | 0x01, /* IER */ | |
163 | 0x02, /* FCR */ | |
164 | 0x02, /* ISR */ | |
165 | 0x03, /* LCR */ | |
166 | 0x04, /* MCR */ | |
167 | 0x05, /* LSR */ | |
168 | 0x06, /* MSR */ | |
169 | 0x07, /* SPR */ | |
170 | 0x00, /* DLL */ | |
171 | 0x01, /* DLM */ | |
172 | 0x00, /* DPR */ | |
173 | 0x01, /* DSR */ | |
174 | 0x02, /* DCR */ | |
175 | 0x0a, /* ECR */ | |
176 | 0x01, /* SP1_REG */ | |
177 | 0x02, /* SP2_REG (7720 only) */ | |
178 | 0x04, /* PP_REG (7715 only) */ | |
179 | 0x08, /* SP_CONTROL_REG */ | |
180 | }; | |
181 | return mos7715_index_lookup_table[reg]; | |
182 | } | |
183 | ||
184 | /* | |
185 | * Return the correct value for the upper byte of the Wvalue field of | |
186 | * the setup packet for a control endpoint message. | |
187 | */ | |
63b91767 MD |
188 | static inline __u16 get_reg_value(enum mos_regs reg, |
189 | unsigned int serial_portnum) | |
b69578df MD |
190 | { |
191 | if (reg >= SP1_REG) /* control reg */ | |
192 | return 0x0000; | |
63b91767 MD |
193 | |
194 | else if (reg >= DPR) /* parallel port reg (7715 only) */ | |
b69578df | 195 | return 0x0100; |
63b91767 MD |
196 | |
197 | else /* serial port reg */ | |
198 | return (serial_portnum + 2) << 8; | |
b69578df MD |
199 | } |
200 | ||
201 | /* | |
202 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
203 | * the value field of the setup packet. serial_portnum is ignored for registers |
204 | * not specific to a particular serial port. | |
b69578df | 205 | */ |
63b91767 MD |
206 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
207 | enum mos_regs reg, __u8 data) | |
b69578df | 208 | { |
b69578df MD |
209 | struct usb_device *usbdev = serial->dev; |
210 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
211 | __u8 request = (__u8)0x0e; | |
212 | __u8 requesttype = (__u8)0x40; | |
b69578df | 213 | __u16 index = get_reg_index(reg); |
63b91767 MD |
214 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
215 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
216 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
217 | if (status < 0) |
218 | dev_err(&usbdev->dev, | |
219 | "mos7720: usb_control_msg() failed: %d", status); | |
220 | return status; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
225 | * device is embedded in the value field of the setup packet. serial_portnum is |
226 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 227 | */ |
63b91767 MD |
228 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
229 | enum mos_regs reg, __u8 *data) | |
b69578df | 230 | { |
63b91767 | 231 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
232 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
233 | __u8 request = (__u8)0x0d; | |
234 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 235 | __u16 index = get_reg_index(reg); |
63b91767 | 236 | __u16 value = get_reg_value(reg, serial_portnum); |
b69578df | 237 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, |
63b91767 | 238 | index, data, 1, MOS_WDR_TIMEOUT); |
b69578df MD |
239 | if (status < 0) |
240 | dev_err(&usbdev->dev, | |
241 | "mos7720: usb_control_msg() failed: %d", status); | |
242 | return status; | |
243 | } | |
244 | ||
63b91767 MD |
245 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
246 | ||
b69578df MD |
247 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
248 | enum mos7715_pp_modes mode) | |
249 | { | |
250 | mos_parport->shadowECR = mode; | |
63b91767 | 251 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
252 | return 0; |
253 | } | |
254 | ||
255 | static void destroy_mos_parport(struct kref *kref) | |
256 | { | |
257 | struct mos7715_parport *mos_parport = | |
258 | container_of(kref, struct mos7715_parport, ref_count); | |
259 | ||
260 | dbg("%s called", __func__); | |
261 | kfree(mos_parport); | |
262 | } | |
263 | ||
264 | static void destroy_urbtracker(struct kref *kref) | |
265 | { | |
266 | struct urbtracker *urbtrack = | |
267 | container_of(kref, struct urbtracker, ref_count); | |
268 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
269 | dbg("%s called", __func__); | |
270 | usb_free_urb(urbtrack->urb); | |
271 | kfree(urbtrack); | |
272 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
273 | } | |
274 | ||
275 | /* | |
276 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
277 | * port callback had to be deferred because the disconnect mutex could not be | |
278 | * obtained at the time. | |
279 | */ | |
280 | static void send_deferred_urbs(unsigned long _mos_parport) | |
281 | { | |
282 | int ret_val; | |
283 | unsigned long flags; | |
284 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
285 | struct urbtracker *urbtrack; | |
286 | struct list_head *cursor, *next; | |
287 | ||
288 | dbg("%s called", __func__); | |
289 | ||
290 | /* if release function ran, game over */ | |
291 | if (unlikely(mos_parport->serial == NULL)) | |
292 | return; | |
293 | ||
294 | /* try again to get the mutex */ | |
295 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
296 | dbg("%s: rescheduling tasklet", __func__); | |
297 | tasklet_schedule(&mos_parport->urb_tasklet); | |
298 | return; | |
299 | } | |
300 | ||
301 | /* if device disconnected, game over */ | |
302 | if (unlikely(mos_parport->serial->disconnected)) { | |
303 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
304 | return; | |
305 | } | |
306 | ||
307 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
308 | if (list_empty(&mos_parport->deferred_urbs)) { | |
309 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
310 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
311 | dbg("%s: deferred_urbs list empty", __func__); | |
312 | return; | |
313 | } | |
314 | ||
315 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
316 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
317 | list_move_tail(cursor, &mos_parport->active_urbs); | |
318 | list_for_each_entry(urbtrack, &mos_parport->active_urbs, | |
319 | urblist_entry) { | |
320 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
321 | dbg("%s: urb submitted", __func__); | |
322 | if (ret_val) { | |
323 | dev_err(&mos_parport->serial->dev->dev, | |
324 | "usb_submit_urb() failed: %d", ret_val); | |
325 | list_del(&urbtrack->urblist_entry); | |
326 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
327 | } | |
328 | } | |
329 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
330 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
331 | } | |
332 | ||
333 | /* callback for parallel port control urbs submitted asynchronously */ | |
334 | static void async_complete(struct urb *urb) | |
335 | { | |
336 | struct urbtracker *urbtrack = urb->context; | |
337 | int status = urb->status; | |
338 | dbg("%s called", __func__); | |
339 | if (unlikely(status)) | |
340 | dbg("%s - nonzero urb status received: %d", __func__, status); | |
341 | ||
342 | /* remove the urbtracker from the active_urbs list */ | |
343 | spin_lock(&urbtrack->mos_parport->listlock); | |
344 | list_del(&urbtrack->urblist_entry); | |
345 | spin_unlock(&urbtrack->mos_parport->listlock); | |
346 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
347 | } | |
348 | ||
349 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
350 | enum mos_regs reg, __u8 data) | |
351 | { | |
352 | struct urbtracker *urbtrack; | |
353 | int ret_val; | |
354 | unsigned long flags; | |
355 | struct usb_ctrlrequest setup; | |
356 | struct usb_serial *serial = mos_parport->serial; | |
357 | struct usb_device *usbdev = serial->dev; | |
358 | dbg("%s called", __func__); | |
359 | ||
360 | /* create and initialize the control urb and containing urbtracker */ | |
361 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
362 | if (urbtrack == NULL) { | |
363 | dev_err(&usbdev->dev, "out of memory"); | |
364 | return -ENOMEM; | |
365 | } | |
366 | kref_get(&mos_parport->ref_count); | |
367 | urbtrack->mos_parport = mos_parport; | |
368 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
369 | if (urbtrack->urb == NULL) { | |
370 | dev_err(&usbdev->dev, "out of urbs"); | |
371 | kfree(urbtrack); | |
372 | return -ENOMEM; | |
373 | } | |
374 | setup.bRequestType = (__u8)0x40; | |
375 | setup.bRequest = (__u8)0x0e; | |
63b91767 | 376 | setup.wValue = get_reg_value(reg, dummy); |
b69578df MD |
377 | setup.wIndex = get_reg_index(reg); |
378 | setup.wLength = 0; | |
379 | usb_fill_control_urb(urbtrack->urb, usbdev, | |
380 | usb_sndctrlpipe(usbdev, 0), | |
381 | (unsigned char *)&setup, | |
382 | NULL, 0, async_complete, urbtrack); | |
383 | kref_init(&urbtrack->ref_count); | |
384 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
385 | ||
386 | /* | |
387 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
388 | * and schedule a tasklet to try again later | |
389 | */ | |
390 | if (!mutex_trylock(&serial->disc_mutex)) { | |
391 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
392 | list_add_tail(&urbtrack->urblist_entry, | |
393 | &mos_parport->deferred_urbs); | |
394 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
395 | tasklet_schedule(&mos_parport->urb_tasklet); | |
396 | dbg("tasklet scheduled"); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | /* bail if device disconnected */ | |
401 | if (serial->disconnected) { | |
402 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
403 | mutex_unlock(&serial->disc_mutex); | |
404 | return -ENODEV; | |
405 | } | |
406 | ||
407 | /* add the tracker to the active_urbs list and submit */ | |
408 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
409 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
410 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
411 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
412 | mutex_unlock(&serial->disc_mutex); | |
413 | if (ret_val) { | |
414 | dev_err(&usbdev->dev, | |
415 | "%s: submit_urb() failed: %d", __func__, ret_val); | |
416 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
417 | list_del(&urbtrack->urblist_entry); | |
418 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
419 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
420 | return ret_val; | |
421 | } | |
422 | return 0; | |
423 | } | |
424 | ||
425 | /* | |
426 | * This is the the common top part of all parallel port callback operations that | |
427 | * send synchronous messages to the device. This implements convoluted locking | |
428 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
429 | * has called our release function, at which point struct mos7715_parport has | |
430 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
431 | * not called the release function yet because someone has a serial port open. | |
432 | * The shared release_lock prevents the first, and the mutex and disconnected | |
433 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
434 | * flag to ensure that all synchronous usb messgage calls have completed before | |
435 | * our release function can return. | |
436 | */ | |
437 | static int parport_prologue(struct parport *pp) | |
438 | { | |
439 | struct mos7715_parport *mos_parport; | |
440 | ||
441 | spin_lock(&release_lock); | |
442 | mos_parport = pp->private_data; | |
443 | if (unlikely(mos_parport == NULL)) { | |
444 | /* release fn called, port struct destroyed */ | |
445 | spin_unlock(&release_lock); | |
446 | return -1; | |
447 | } | |
448 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
449 | INIT_COMPLETION(mos_parport->syncmsg_compl); | |
450 | spin_unlock(&release_lock); | |
451 | ||
452 | mutex_lock(&mos_parport->serial->disc_mutex); | |
453 | if (mos_parport->serial->disconnected) { | |
454 | /* device disconnected */ | |
455 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
456 | mos_parport->msg_pending = false; | |
457 | complete(&mos_parport->syncmsg_compl); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | /* | |
465 | * This is the the common bottom part of all parallel port functions that send | |
466 | * synchronous messages to the device. | |
467 | */ | |
468 | static inline void parport_epilogue(struct parport *pp) | |
469 | { | |
470 | struct mos7715_parport *mos_parport = pp->private_data; | |
471 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
472 | mos_parport->msg_pending = false; | |
473 | complete(&mos_parport->syncmsg_compl); | |
474 | } | |
475 | ||
476 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
477 | { | |
478 | struct mos7715_parport *mos_parport = pp->private_data; | |
479 | dbg("%s called: %2.2x", __func__, d); | |
480 | if (parport_prologue(pp) < 0) | |
481 | return; | |
482 | mos7715_change_mode(mos_parport, SPP); | |
63b91767 | 483 | write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d); |
b69578df MD |
484 | parport_epilogue(pp); |
485 | } | |
486 | ||
487 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
488 | { | |
489 | struct mos7715_parport *mos_parport = pp->private_data; | |
490 | unsigned char d; | |
491 | dbg("%s called", __func__); | |
492 | if (parport_prologue(pp) < 0) | |
493 | return 0; | |
63b91767 | 494 | read_mos_reg(mos_parport->serial, dummy, DPR, &d); |
b69578df MD |
495 | parport_epilogue(pp); |
496 | return d; | |
497 | } | |
498 | ||
499 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
500 | { | |
501 | struct mos7715_parport *mos_parport = pp->private_data; | |
502 | __u8 data; | |
503 | dbg("%s called: %2.2x", __func__, d); | |
504 | if (parport_prologue(pp) < 0) | |
505 | return; | |
506 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
63b91767 | 507 | write_mos_reg(mos_parport->serial, dummy, DCR, data); |
b69578df MD |
508 | mos_parport->shadowDCR = data; |
509 | parport_epilogue(pp); | |
510 | } | |
511 | ||
512 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
513 | { | |
514 | struct mos7715_parport *mos_parport = pp->private_data; | |
515 | __u8 dcr; | |
516 | dbg("%s called", __func__); | |
517 | spin_lock(&release_lock); | |
518 | mos_parport = pp->private_data; | |
519 | if (unlikely(mos_parport == NULL)) { | |
520 | spin_unlock(&release_lock); | |
521 | return 0; | |
522 | } | |
523 | dcr = mos_parport->shadowDCR & 0x0f; | |
524 | spin_unlock(&release_lock); | |
525 | return dcr; | |
526 | } | |
527 | ||
528 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
529 | unsigned char mask, | |
530 | unsigned char val) | |
531 | { | |
532 | struct mos7715_parport *mos_parport = pp->private_data; | |
533 | __u8 dcr; | |
534 | dbg("%s called", __func__); | |
535 | mask &= 0x0f; | |
536 | val &= 0x0f; | |
537 | if (parport_prologue(pp) < 0) | |
538 | return 0; | |
539 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
63b91767 | 540 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
541 | dcr = mos_parport->shadowDCR & 0x0f; |
542 | parport_epilogue(pp); | |
543 | return dcr; | |
544 | } | |
545 | ||
546 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
547 | { | |
548 | unsigned char status; | |
549 | struct mos7715_parport *mos_parport = pp->private_data; | |
550 | dbg("%s called", __func__); | |
551 | spin_lock(&release_lock); | |
552 | mos_parport = pp->private_data; | |
553 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
554 | spin_unlock(&release_lock); | |
555 | return 0; | |
556 | } | |
557 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
558 | spin_unlock(&release_lock); | |
559 | return status; | |
560 | } | |
561 | ||
562 | static void parport_mos7715_enable_irq(struct parport *pp) | |
563 | { | |
564 | dbg("%s called", __func__); | |
565 | } | |
566 | static void parport_mos7715_disable_irq(struct parport *pp) | |
567 | { | |
568 | dbg("%s called", __func__); | |
569 | } | |
570 | ||
571 | static void parport_mos7715_data_forward(struct parport *pp) | |
572 | { | |
573 | struct mos7715_parport *mos_parport = pp->private_data; | |
574 | dbg("%s called", __func__); | |
575 | if (parport_prologue(pp) < 0) | |
576 | return; | |
577 | mos7715_change_mode(mos_parport, PS2); | |
578 | mos_parport->shadowDCR &= ~0x20; | |
63b91767 | 579 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
580 | parport_epilogue(pp); |
581 | } | |
582 | ||
583 | static void parport_mos7715_data_reverse(struct parport *pp) | |
584 | { | |
585 | struct mos7715_parport *mos_parport = pp->private_data; | |
586 | dbg("%s called", __func__); | |
587 | if (parport_prologue(pp) < 0) | |
588 | return; | |
589 | mos7715_change_mode(mos_parport, PS2); | |
590 | mos_parport->shadowDCR |= 0x20; | |
63b91767 | 591 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
592 | parport_epilogue(pp); |
593 | } | |
594 | ||
595 | static void parport_mos7715_init_state(struct pardevice *dev, | |
596 | struct parport_state *s) | |
597 | { | |
598 | dbg("%s called", __func__); | |
599 | s->u.pc.ctr = DCR_INIT_VAL; | |
600 | s->u.pc.ecr = ECR_INIT_VAL; | |
601 | } | |
602 | ||
603 | /* N.B. Parport core code requires that this function not block */ | |
604 | static void parport_mos7715_save_state(struct parport *pp, | |
605 | struct parport_state *s) | |
606 | { | |
607 | struct mos7715_parport *mos_parport; | |
608 | dbg("%s called", __func__); | |
609 | spin_lock(&release_lock); | |
610 | mos_parport = pp->private_data; | |
611 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
612 | spin_unlock(&release_lock); | |
613 | return; | |
614 | } | |
615 | s->u.pc.ctr = mos_parport->shadowDCR; | |
616 | s->u.pc.ecr = mos_parport->shadowECR; | |
617 | spin_unlock(&release_lock); | |
618 | } | |
619 | ||
620 | /* N.B. Parport core code requires that this function not block */ | |
621 | static void parport_mos7715_restore_state(struct parport *pp, | |
622 | struct parport_state *s) | |
623 | { | |
624 | struct mos7715_parport *mos_parport; | |
625 | dbg("%s called", __func__); | |
626 | spin_lock(&release_lock); | |
627 | mos_parport = pp->private_data; | |
628 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
629 | spin_unlock(&release_lock); | |
630 | return; | |
631 | } | |
632 | write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); | |
633 | write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); | |
634 | spin_unlock(&release_lock); | |
635 | } | |
636 | ||
637 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
638 | const void *buffer, | |
639 | size_t len, int flags) | |
640 | { | |
641 | int retval; | |
642 | struct mos7715_parport *mos_parport = pp->private_data; | |
643 | int actual_len; | |
644 | dbg("%s called: %u chars", __func__, (unsigned int)len); | |
645 | if (parport_prologue(pp) < 0) | |
646 | return 0; | |
647 | mos7715_change_mode(mos_parport, PPF); | |
648 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
649 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
650 | (void *)buffer, len, &actual_len, | |
651 | MOS_WDR_TIMEOUT); | |
652 | parport_epilogue(pp); | |
653 | if (retval) { | |
654 | dev_err(&mos_parport->serial->dev->dev, | |
655 | "mos7720: usb_bulk_msg() failed: %d", retval); | |
656 | return 0; | |
657 | } | |
658 | return actual_len; | |
659 | } | |
660 | ||
661 | static struct parport_operations parport_mos7715_ops = { | |
662 | .owner = THIS_MODULE, | |
663 | .write_data = parport_mos7715_write_data, | |
664 | .read_data = parport_mos7715_read_data, | |
665 | ||
666 | .write_control = parport_mos7715_write_control, | |
667 | .read_control = parport_mos7715_read_control, | |
668 | .frob_control = parport_mos7715_frob_control, | |
669 | ||
670 | .read_status = parport_mos7715_read_status, | |
671 | ||
672 | .enable_irq = parport_mos7715_enable_irq, | |
673 | .disable_irq = parport_mos7715_disable_irq, | |
674 | ||
675 | .data_forward = parport_mos7715_data_forward, | |
676 | .data_reverse = parport_mos7715_data_reverse, | |
677 | ||
678 | .init_state = parport_mos7715_init_state, | |
679 | .save_state = parport_mos7715_save_state, | |
680 | .restore_state = parport_mos7715_restore_state, | |
681 | ||
682 | .compat_write_data = parport_mos7715_write_compat, | |
683 | ||
684 | .nibble_read_data = parport_ieee1284_read_nibble, | |
685 | .byte_read_data = parport_ieee1284_read_byte, | |
686 | }; | |
687 | ||
688 | /* | |
689 | * Allocate and initialize parallel port control struct, initialize | |
690 | * the parallel port hardware device, and register with the parport subsystem. | |
691 | */ | |
692 | static int mos7715_parport_init(struct usb_serial *serial) | |
693 | { | |
694 | struct mos7715_parport *mos_parport; | |
695 | ||
696 | /* allocate and initialize parallel port control struct */ | |
697 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
698 | if (mos_parport == NULL) { | |
699 | dbg("mos7715_parport_init: kzalloc failed"); | |
700 | return -ENOMEM; | |
701 | } | |
702 | mos_parport->msg_pending = false; | |
703 | kref_init(&mos_parport->ref_count); | |
704 | spin_lock_init(&mos_parport->listlock); | |
705 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
706 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
707 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
708 | mos_parport->serial = serial; | |
709 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
710 | (unsigned long) mos_parport); | |
711 | init_completion(&mos_parport->syncmsg_compl); | |
712 | ||
713 | /* cycle parallel port reset bit */ | |
63b91767 MD |
714 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
715 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); | |
b69578df MD |
716 | |
717 | /* initialize device registers */ | |
718 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
63b91767 | 719 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df | 720 | mos_parport->shadowECR = ECR_INIT_VAL; |
63b91767 | 721 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
722 | |
723 | /* register with parport core */ | |
724 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
725 | PARPORT_DMA_NONE, | |
726 | &parport_mos7715_ops); | |
727 | if (mos_parport->pp == NULL) { | |
728 | dev_err(&serial->interface->dev, | |
729 | "Could not register parport\n"); | |
730 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
731 | return -EIO; | |
732 | } | |
733 | mos_parport->pp->private_data = mos_parport; | |
734 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
735 | mos_parport->pp->dev = &serial->interface->dev; | |
736 | parport_announce_port(mos_parport->pp); | |
737 | ||
738 | return 0; | |
739 | } | |
740 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
741 | |
742 | /* | |
743 | * mos7720_interrupt_callback | |
744 | * this is the callback function for when we have received data on the | |
745 | * interrupt endpoint. | |
746 | */ | |
747 | static void mos7720_interrupt_callback(struct urb *urb) | |
748 | { | |
749 | int result; | |
750 | int length; | |
81105984 | 751 | int status = urb->status; |
325b70c2 | 752 | __u8 *data; |
0f64478c GKH |
753 | __u8 sp1; |
754 | __u8 sp2; | |
0f64478c | 755 | |
81105984 | 756 | switch (status) { |
0f64478c GKH |
757 | case 0: |
758 | /* success */ | |
759 | break; | |
760 | case -ECONNRESET: | |
761 | case -ENOENT: | |
762 | case -ESHUTDOWN: | |
763 | /* this urb is terminated, clean up */ | |
441b62c1 | 764 | dbg("%s - urb shutting down with status: %d", __func__, |
81105984 | 765 | status); |
0f64478c GKH |
766 | return; |
767 | default: | |
441b62c1 | 768 | dbg("%s - nonzero urb status received: %d", __func__, |
81105984 | 769 | status); |
0f64478c GKH |
770 | goto exit; |
771 | } | |
772 | ||
773 | length = urb->actual_length; | |
774 | data = urb->transfer_buffer; | |
775 | ||
776 | /* Moschip get 4 bytes | |
777 | * Byte 1 IIR Port 1 (port.number is 0) | |
778 | * Byte 2 IIR Port 2 (port.number is 1) | |
779 | * Byte 3 -------------- | |
780 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
781 | |
782 | /* the above description is inverted | |
783 | * oneukum 2007-03-14 */ | |
784 | ||
785 | if (unlikely(length != 4)) { | |
0f64478c GKH |
786 | dbg("Wrong data !!!"); |
787 | return; | |
788 | } | |
789 | ||
325b70c2 ON |
790 | sp1 = data[3]; |
791 | sp2 = data[2]; | |
0f64478c | 792 | |
325b70c2 | 793 | if ((sp1 | sp2) & 0x01) { |
0f64478c GKH |
794 | /* No Interrupt Pending in both the ports */ |
795 | dbg("No Interrupt !!!"); | |
796 | } else { | |
797 | switch (sp1 & 0x0f) { | |
798 | case SERIAL_IIR_RLS: | |
799 | dbg("Serial Port 1: Receiver status error or address " | |
800 | "bit detected in 9-bit mode\n"); | |
801 | break; | |
802 | case SERIAL_IIR_CTI: | |
803 | dbg("Serial Port 1: Receiver time out"); | |
804 | break; | |
805 | case SERIAL_IIR_MS: | |
b69578df | 806 | /* dbg("Serial Port 1: Modem status change"); */ |
0f64478c GKH |
807 | break; |
808 | } | |
809 | ||
810 | switch (sp2 & 0x0f) { | |
811 | case SERIAL_IIR_RLS: | |
812 | dbg("Serial Port 2: Receiver status error or address " | |
813 | "bit detected in 9-bit mode"); | |
814 | break; | |
815 | case SERIAL_IIR_CTI: | |
816 | dbg("Serial Port 2: Receiver time out"); | |
817 | break; | |
818 | case SERIAL_IIR_MS: | |
b69578df | 819 | /* dbg("Serial Port 2: Modem status change"); */ |
0f64478c GKH |
820 | break; |
821 | } | |
822 | } | |
823 | ||
824 | exit: | |
825 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
826 | if (result) | |
827 | dev_err(&urb->dev->dev, | |
828 | "%s - Error %d submitting control urb\n", | |
441b62c1 | 829 | __func__, result); |
0f64478c GKH |
830 | } |
831 | ||
fb088e33 MD |
832 | /* |
833 | * mos7715_interrupt_callback | |
834 | * this is the 7715's callback function for when we have received data on | |
835 | * the interrupt endpoint. | |
836 | */ | |
837 | static void mos7715_interrupt_callback(struct urb *urb) | |
838 | { | |
839 | int result; | |
840 | int length; | |
841 | int status = urb->status; | |
842 | __u8 *data; | |
843 | __u8 iir; | |
844 | ||
845 | switch (status) { | |
846 | case 0: | |
847 | /* success */ | |
848 | break; | |
849 | case -ECONNRESET: | |
850 | case -ENOENT: | |
851 | case -ESHUTDOWN: | |
b69578df | 852 | case -ENODEV: |
fb088e33 MD |
853 | /* this urb is terminated, clean up */ |
854 | dbg("%s - urb shutting down with status: %d", __func__, | |
855 | status); | |
856 | return; | |
857 | default: | |
858 | dbg("%s - nonzero urb status received: %d", __func__, | |
859 | status); | |
860 | goto exit; | |
861 | } | |
862 | ||
863 | length = urb->actual_length; | |
864 | data = urb->transfer_buffer; | |
865 | ||
866 | /* Structure of data from 7715 device: | |
867 | * Byte 1: IIR serial Port | |
868 | * Byte 2: unused | |
869 | * Byte 2: DSR parallel port | |
870 | * Byte 4: FIFO status for both */ | |
871 | ||
872 | if (unlikely(length != 4)) { | |
873 | dbg("Wrong data !!!"); | |
874 | return; | |
875 | } | |
876 | ||
877 | iir = data[0]; | |
878 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
879 | switch (iir & 0x0f) { | |
880 | case SERIAL_IIR_RLS: | |
881 | dbg("Serial Port: Receiver status error or address " | |
882 | "bit detected in 9-bit mode\n"); | |
883 | break; | |
884 | case SERIAL_IIR_CTI: | |
885 | dbg("Serial Port: Receiver time out"); | |
886 | break; | |
887 | case SERIAL_IIR_MS: | |
b69578df | 888 | /* dbg("Serial Port: Modem status change"); */ |
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) | |
906 | dev_err(&urb->dev->dev, | |
907 | "%s - Error %d submitting control urb\n", | |
908 | __func__, result); | |
fb088e33 MD |
909 | } |
910 | ||
0f64478c GKH |
911 | /* |
912 | * mos7720_bulk_in_callback | |
913 | * this is the callback function for when we have received data on the | |
914 | * bulk in endpoint. | |
915 | */ | |
916 | static void mos7720_bulk_in_callback(struct urb *urb) | |
917 | { | |
81105984 | 918 | int retval; |
0f64478c GKH |
919 | unsigned char *data ; |
920 | struct usb_serial_port *port; | |
0f64478c | 921 | struct tty_struct *tty; |
81105984 | 922 | int status = urb->status; |
0f64478c | 923 | |
81105984 GKH |
924 | if (status) { |
925 | dbg("nonzero read bulk status received: %d", status); | |
0f64478c GKH |
926 | return; |
927 | } | |
928 | ||
b69578df | 929 | port = urb->context; |
0f64478c | 930 | |
441b62c1 | 931 | dbg("Entering...%s", __func__); |
0f64478c GKH |
932 | |
933 | data = urb->transfer_buffer; | |
934 | ||
4a90f09b | 935 | tty = tty_port_tty_get(&port->port); |
0f64478c | 936 | if (tty && urb->actual_length) { |
0f64478c GKH |
937 | tty_insert_flip_string(tty, data, urb->actual_length); |
938 | tty_flip_buffer_push(tty); | |
939 | } | |
4a90f09b | 940 | tty_kref_put(tty); |
0f64478c | 941 | |
0f64478c | 942 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
943 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
944 | if (retval) | |
945 | dbg("usb_submit_urb(read bulk) failed, retval = %d", | |
946 | retval); | |
0f64478c GKH |
947 | } |
948 | } | |
949 | ||
950 | /* | |
951 | * mos7720_bulk_out_data_callback | |
952 | * this is the callback function for when we have finished sending serial | |
953 | * data on the bulk out endpoint. | |
954 | */ | |
955 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
956 | { | |
957 | struct moschip_port *mos7720_port; | |
958 | struct tty_struct *tty; | |
81105984 | 959 | int status = urb->status; |
0f64478c | 960 | |
81105984 GKH |
961 | if (status) { |
962 | dbg("nonzero write bulk status received:%d", status); | |
0f64478c GKH |
963 | return; |
964 | } | |
965 | ||
966 | mos7720_port = urb->context; | |
967 | if (!mos7720_port) { | |
968 | dbg("NULL mos7720_port pointer"); | |
969 | return ; | |
970 | } | |
971 | ||
4a90f09b | 972 | tty = tty_port_tty_get(&mos7720_port->port->port); |
0f64478c | 973 | |
b963a844 JS |
974 | if (tty && mos7720_port->open) |
975 | tty_wakeup(tty); | |
4a90f09b | 976 | tty_kref_put(tty); |
0f64478c GKH |
977 | } |
978 | ||
fb088e33 MD |
979 | /* |
980 | * mos77xx_probe | |
981 | * this function installs the appropriate read interrupt endpoint callback | |
982 | * depending on whether the device is a 7720 or 7715, thus avoiding costly | |
983 | * run-time checks in the high-frequency callback routine itself. | |
984 | */ | |
985 | static int mos77xx_probe(struct usb_serial *serial, | |
986 | const struct usb_device_id *id) | |
987 | { | |
988 | if (id->idProduct == MOSCHIP_DEVICE_ID_7715) | |
989 | moschip7720_2port_driver.read_int_callback = | |
990 | mos7715_interrupt_callback; | |
991 | else | |
992 | moschip7720_2port_driver.read_int_callback = | |
993 | mos7720_interrupt_callback; | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
998 | static int mos77xx_calc_num_ports(struct usb_serial *serial) | |
999 | { | |
1000 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
1001 | if (product == MOSCHIP_DEVICE_ID_7715) | |
1002 | return 1; | |
1003 | ||
1004 | return 2; | |
1005 | } | |
1006 | ||
a509a7e4 | 1007 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
1008 | { |
1009 | struct usb_serial *serial; | |
0f64478c | 1010 | struct urb *urb; |
0f64478c GKH |
1011 | struct moschip_port *mos7720_port; |
1012 | int response; | |
1013 | int port_number; | |
63b91767 | 1014 | __u8 data; |
fe4b65ec | 1015 | int allocated_urbs = 0; |
0f64478c GKH |
1016 | int j; |
1017 | ||
1018 | serial = port->serial; | |
1019 | ||
1020 | mos7720_port = usb_get_serial_port_data(port); | |
1021 | if (mos7720_port == NULL) | |
1022 | return -ENODEV; | |
1023 | ||
0f64478c GKH |
1024 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
1025 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
1026 | ||
1027 | /* Initialising the write urb pool */ | |
1028 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 1029 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c GKH |
1030 | mos7720_port->write_urb_pool[j] = urb; |
1031 | ||
1032 | if (urb == NULL) { | |
194343d9 | 1033 | dev_err(&port->dev, "No more urbs???\n"); |
0f64478c GKH |
1034 | continue; |
1035 | } | |
1036 | ||
1037 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1038 | GFP_KERNEL); | |
1039 | if (!urb->transfer_buffer) { | |
194343d9 GKH |
1040 | dev_err(&port->dev, |
1041 | "%s-out of memory for urb buffers.\n", | |
1042 | __func__); | |
fe4b65ec ON |
1043 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1044 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1045 | continue; |
1046 | } | |
fe4b65ec | 1047 | allocated_urbs++; |
0f64478c GKH |
1048 | } |
1049 | ||
fe4b65ec ON |
1050 | if (!allocated_urbs) |
1051 | return -ENOMEM; | |
1052 | ||
0f64478c GKH |
1053 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1054 | * | |
1055 | * Register Index | |
2f9ea55c | 1056 | * 0 : THR/RHR |
0f64478c GKH |
1057 | * 1 : IER |
1058 | * 2 : FCR | |
1059 | * 3 : LCR | |
1060 | * 4 : MCR | |
2f9ea55c KS |
1061 | * 5 : LSR |
1062 | * 6 : MSR | |
1063 | * 7 : SPR | |
0f64478c GKH |
1064 | * |
1065 | * 0x08 : SP1/2 Control Reg | |
1066 | */ | |
1067 | port_number = port->number - port->serial->minor; | |
63b91767 MD |
1068 | read_mos_reg(serial, port_number, LSR, &data); |
1069 | ||
759f3634 | 1070 | dbg("SS::%p LSR:%x", mos7720_port, data); |
0f64478c GKH |
1071 | |
1072 | dbg("Check:Sending Command .........."); | |
1073 | ||
63b91767 MD |
1074 | write_mos_reg(serial, dummy, SP1_REG, 0x02); |
1075 | write_mos_reg(serial, dummy, SP2_REG, 0x02); | |
0f64478c | 1076 | |
63b91767 MD |
1077 | write_mos_reg(serial, port_number, IER, 0x00); |
1078 | write_mos_reg(serial, port_number, FCR, 0x00); | |
0f64478c | 1079 | |
63b91767 MD |
1080 | write_mos_reg(serial, port_number, FCR, 0xcf); |
1081 | mos7720_port->shadowLCR = 0x03; | |
1082 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1083 | mos7720_port->shadowMCR = 0x0b; | |
1084 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1085 | |
63b91767 MD |
1086 | write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
1087 | read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); | |
0f64478c | 1088 | data = data | (port->number - port->serial->minor + 1); |
63b91767 MD |
1089 | write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
1090 | mos7720_port->shadowLCR = 0x83; | |
1091 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1092 | write_mos_reg(serial, port_number, THR, 0x0c); | |
1093 | write_mos_reg(serial, port_number, IER, 0x00); | |
1094 | mos7720_port->shadowLCR = 0x03; | |
1095 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1096 | write_mos_reg(serial, port_number, IER, 0x0c); | |
0f64478c | 1097 | |
0f64478c GKH |
1098 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1099 | if (response) | |
4da1a17d AC |
1100 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1101 | __func__, response); | |
0f64478c GKH |
1102 | |
1103 | /* initialize our icount structure */ | |
1104 | memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); | |
1105 | ||
1106 | /* initialize our port settings */ | |
1107 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1108 | ||
1109 | /* send a open port command */ | |
1110 | mos7720_port->open = 1; | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * mos7720_chars_in_buffer | |
1117 | * this function is called by the tty driver when it wants to know how many | |
1118 | * bytes of data we currently have outstanding in the port (data that has | |
1119 | * been written, but hasn't made it out the port yet) | |
1120 | * If successful, we return the number of bytes left to be written in the | |
1121 | * system, | |
1122 | * Otherwise we return a negative error number. | |
1123 | */ | |
95da310e | 1124 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1125 | { |
95da310e | 1126 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1127 | int i; |
1128 | int chars = 0; | |
1129 | struct moschip_port *mos7720_port; | |
1130 | ||
441b62c1 | 1131 | dbg("%s:entering ...........", __func__); |
0f64478c GKH |
1132 | |
1133 | mos7720_port = usb_get_serial_port_data(port); | |
1134 | if (mos7720_port == NULL) { | |
441b62c1 | 1135 | dbg("%s:leaving ...........", __func__); |
23198fda | 1136 | return 0; |
0f64478c GKH |
1137 | } |
1138 | ||
1139 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1140 | if (mos7720_port->write_urb_pool[i] && |
1141 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1142 | chars += URB_TRANSFER_BUFFER_SIZE; |
1143 | } | |
441b62c1 | 1144 | dbg("%s - returns %d", __func__, chars); |
0f64478c GKH |
1145 | return chars; |
1146 | } | |
1147 | ||
335f8514 | 1148 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1149 | { |
1150 | struct usb_serial *serial; | |
1151 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1152 | int j; |
1153 | ||
1154 | dbg("mos7720_close:entering..."); | |
1155 | ||
1156 | serial = port->serial; | |
1157 | ||
1158 | mos7720_port = usb_get_serial_port_data(port); | |
1159 | if (mos7720_port == NULL) | |
1160 | return; | |
1161 | ||
1162 | for (j = 0; j < NUM_URBS; ++j) | |
1163 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1164 | ||
1165 | /* Freeing Write URBs */ | |
1166 | for (j = 0; j < NUM_URBS; ++j) { | |
1167 | if (mos7720_port->write_urb_pool[j]) { | |
1168 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1169 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 ON |
1174 | * and interrupt read if they exists, otherwise nop */ |
1175 | dbg("Shutdown bulk write"); | |
1176 | usb_kill_urb(port->write_urb); | |
1177 | dbg("Shutdown bulk read"); | |
1178 | usb_kill_urb(port->read_urb); | |
1179 | ||
1180 | mutex_lock(&serial->disc_mutex); | |
1181 | /* these commands must not be issued if the device has | |
1182 | * been disconnected */ | |
1183 | if (!serial->disconnected) { | |
63b91767 MD |
1184 | write_mos_reg(serial, port->number - port->serial->minor, |
1185 | MCR, 0x00); | |
1186 | write_mos_reg(serial, port->number - port->serial->minor, | |
1187 | IER, 0x00); | |
0f64478c | 1188 | } |
a1cd7e99 | 1189 | mutex_unlock(&serial->disc_mutex); |
0f64478c GKH |
1190 | mos7720_port->open = 0; |
1191 | ||
441b62c1 | 1192 | dbg("Leaving %s", __func__); |
0f64478c GKH |
1193 | } |
1194 | ||
95da310e | 1195 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1196 | { |
95da310e | 1197 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1198 | unsigned char data; |
0f64478c GKH |
1199 | struct usb_serial *serial; |
1200 | struct moschip_port *mos7720_port; | |
1201 | ||
441b62c1 | 1202 | dbg("Entering %s", __func__); |
0f64478c GKH |
1203 | |
1204 | serial = port->serial; | |
1205 | ||
1206 | mos7720_port = usb_get_serial_port_data(port); | |
1207 | if (mos7720_port == NULL) | |
1208 | return; | |
1209 | ||
1210 | if (break_state == -1) | |
1211 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1212 | else | |
1213 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1214 | ||
1215 | mos7720_port->shadowLCR = data; | |
63b91767 MD |
1216 | write_mos_reg(serial, port->number - port->serial->minor, |
1217 | LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1218 | } |
1219 | ||
1220 | /* | |
1221 | * mos7720_write_room | |
1222 | * this function is called by the tty driver when it wants to know how many | |
1223 | * bytes of data we can accept for a specific port. | |
1224 | * If successful, we return the amount of room that we have for this port | |
1225 | * Otherwise we return a negative error number. | |
1226 | */ | |
95da310e | 1227 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1228 | { |
95da310e | 1229 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1230 | struct moschip_port *mos7720_port; |
1231 | int room = 0; | |
1232 | int i; | |
1233 | ||
441b62c1 | 1234 | dbg("%s:entering ...........", __func__); |
0f64478c GKH |
1235 | |
1236 | mos7720_port = usb_get_serial_port_data(port); | |
1237 | if (mos7720_port == NULL) { | |
441b62c1 | 1238 | dbg("%s:leaving ...........", __func__); |
0f64478c GKH |
1239 | return -ENODEV; |
1240 | } | |
1241 | ||
a5b6f60c | 1242 | /* FIXME: Locking */ |
0f64478c | 1243 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1244 | if (mos7720_port->write_urb_pool[i] && |
1245 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1246 | room += URB_TRANSFER_BUFFER_SIZE; |
1247 | } | |
1248 | ||
441b62c1 | 1249 | dbg("%s - returns %d", __func__, room); |
0f64478c GKH |
1250 | return room; |
1251 | } | |
1252 | ||
95da310e AC |
1253 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1254 | const unsigned char *data, int count) | |
0f64478c GKH |
1255 | { |
1256 | int status; | |
1257 | int i; | |
1258 | int bytes_sent = 0; | |
1259 | int transfer_size; | |
1260 | ||
1261 | struct moschip_port *mos7720_port; | |
1262 | struct usb_serial *serial; | |
1263 | struct urb *urb; | |
1264 | const unsigned char *current_position = data; | |
1265 | ||
441b62c1 | 1266 | dbg("%s:entering ...........", __func__); |
0f64478c GKH |
1267 | |
1268 | serial = port->serial; | |
1269 | ||
1270 | mos7720_port = usb_get_serial_port_data(port); | |
1271 | if (mos7720_port == NULL) { | |
1272 | dbg("mos7720_port is NULL"); | |
1273 | return -ENODEV; | |
1274 | } | |
1275 | ||
1276 | /* try to find a free urb in the list */ | |
1277 | urb = NULL; | |
1278 | ||
1279 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1280 | if (mos7720_port->write_urb_pool[i] && |
1281 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1282 | urb = mos7720_port->write_urb_pool[i]; |
4da1a17d | 1283 | dbg("URB:%d", i); |
0f64478c GKH |
1284 | break; |
1285 | } | |
1286 | } | |
1287 | ||
1288 | if (urb == NULL) { | |
441b62c1 | 1289 | dbg("%s - no more free urbs", __func__); |
0f64478c GKH |
1290 | goto exit; |
1291 | } | |
1292 | ||
1293 | if (urb->transfer_buffer == NULL) { | |
1294 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1295 | GFP_KERNEL); | |
1296 | if (urb->transfer_buffer == NULL) { | |
22a416c4 | 1297 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1298 | __func__); |
0f64478c GKH |
1299 | goto exit; |
1300 | } | |
1301 | } | |
4da1a17d | 1302 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1303 | |
1304 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
441b62c1 | 1305 | usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, |
0f64478c GKH |
1306 | urb->transfer_buffer); |
1307 | ||
1308 | /* fill urb with data and submit */ | |
1309 | usb_fill_bulk_urb(urb, serial->dev, | |
1310 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1311 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1312 | urb->transfer_buffer, transfer_size, |
1313 | mos7720_bulk_out_data_callback, mos7720_port); | |
1314 | ||
1315 | /* send it down the pipe */ | |
4da1a17d | 1316 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1317 | if (status) { |
22a416c4 | 1318 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1319 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1320 | bytes_sent = status; |
1321 | goto exit; | |
1322 | } | |
1323 | bytes_sent = transfer_size; | |
1324 | ||
1325 | exit: | |
1326 | return bytes_sent; | |
1327 | } | |
1328 | ||
95da310e | 1329 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1330 | { |
95da310e | 1331 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1332 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1333 | int status; |
1334 | ||
759f3634 | 1335 | dbg("%s- port %d", __func__, port->number); |
0f64478c GKH |
1336 | |
1337 | mos7720_port = usb_get_serial_port_data(port); | |
1338 | ||
1339 | if (mos7720_port == NULL) | |
1340 | return; | |
1341 | ||
1342 | if (!mos7720_port->open) { | |
1343 | dbg("port not opened"); | |
1344 | return; | |
1345 | } | |
1346 | ||
441b62c1 | 1347 | dbg("%s: Entering ..........", __func__); |
0f64478c | 1348 | |
0f64478c GKH |
1349 | /* if we are implementing XON/XOFF, send the stop character */ |
1350 | if (I_IXOFF(tty)) { | |
1351 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1352 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1353 | if (status <= 0) |
1354 | return; | |
1355 | } | |
1356 | ||
1357 | /* if we are implementing RTS/CTS, toggle that line */ | |
1358 | if (tty->termios->c_cflag & CRTSCTS) { | |
1359 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; | |
63b91767 MD |
1360 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1361 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1362 | if (status != 0) |
1363 | return; | |
1364 | } | |
1365 | } | |
1366 | ||
95da310e | 1367 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1368 | { |
95da310e | 1369 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1370 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1371 | int status; |
0f64478c GKH |
1372 | |
1373 | if (mos7720_port == NULL) | |
1374 | return; | |
1375 | ||
1376 | if (!mos7720_port->open) { | |
441b62c1 | 1377 | dbg("%s - port not opened", __func__); |
0f64478c GKH |
1378 | return; |
1379 | } | |
1380 | ||
441b62c1 | 1381 | dbg("%s: Entering ..........", __func__); |
0f64478c | 1382 | |
0f64478c GKH |
1383 | /* if we are implementing XON/XOFF, send the start character */ |
1384 | if (I_IXOFF(tty)) { | |
1385 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1386 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1387 | if (status <= 0) |
1388 | return; | |
1389 | } | |
1390 | ||
1391 | /* if we are implementing RTS/CTS, toggle that line */ | |
1392 | if (tty->termios->c_cflag & CRTSCTS) { | |
1393 | mos7720_port->shadowMCR |= UART_MCR_RTS; | |
63b91767 MD |
1394 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1395 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1396 | if (status != 0) |
1397 | return; | |
1398 | } | |
1399 | } | |
1400 | ||
b69578df | 1401 | /* FIXME: this function does not work */ |
0f64478c GKH |
1402 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1403 | unsigned int baud) | |
1404 | { | |
0f64478c GKH |
1405 | struct usb_serial_port *port; |
1406 | struct usb_serial *serial; | |
1407 | int port_number; | |
63b91767 | 1408 | enum mos_regs sp_reg; |
0f64478c GKH |
1409 | if (mos7720_port == NULL) |
1410 | return -EINVAL; | |
1411 | ||
1412 | port = mos7720_port->port; | |
1413 | serial = port->serial; | |
1414 | ||
4da1a17d AC |
1415 | /*********************************************** |
1416 | * Init Sequence for higher rates | |
1417 | ***********************************************/ | |
0f64478c GKH |
1418 | dbg("Sending Setting Commands .........."); |
1419 | port_number = port->number - port->serial->minor; | |
1420 | ||
63b91767 MD |
1421 | write_mos_reg(serial, port_number, IER, 0x00); |
1422 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1423 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
1424 | mos7720_port->shadowMCR = 0x0b; | |
1425 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
1426 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); | |
0f64478c | 1427 | |
4da1a17d AC |
1428 | /*********************************************** |
1429 | * Set for higher rates * | |
1430 | ***********************************************/ | |
b69578df | 1431 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 MD |
1432 | if (port_number == 0) |
1433 | sp_reg = SP1_REG; | |
1434 | else | |
1435 | sp_reg = SP2_REG; | |
1436 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); | |
1437 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); | |
1438 | mos7720_port->shadowMCR = 0x2b; | |
1439 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1440 | |
4da1a17d AC |
1441 | /*********************************************** |
1442 | * Set DLL/DLM | |
1443 | ***********************************************/ | |
63b91767 MD |
1444 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1445 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1446 | write_mos_reg(serial, port_number, DLL, 0x01); | |
1447 | write_mos_reg(serial, port_number, DLM, 0x00); | |
1448 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1449 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1450 | |
1451 | return 0; | |
1452 | } | |
1453 | ||
1454 | /* baud rate information */ | |
4da1a17d | 1455 | struct divisor_table_entry { |
0f64478c GKH |
1456 | __u32 baudrate; |
1457 | __u16 divisor; | |
1458 | }; | |
1459 | ||
1460 | /* Define table of divisors for moschip 7720 hardware * | |
1461 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1462 | * MCR.7 = 0. */ | |
1463 | static struct divisor_table_entry divisor_table[] = { | |
1464 | { 50, 2304}, | |
1465 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1466 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1467 | { 150, 768}, | |
1468 | { 300, 384}, | |
1469 | { 600, 192}, | |
1470 | { 1200, 96}, | |
1471 | { 1800, 64}, | |
1472 | { 2400, 48}, | |
1473 | { 4800, 24}, | |
1474 | { 7200, 16}, | |
1475 | { 9600, 12}, | |
1476 | { 19200, 6}, | |
1477 | { 38400, 3}, | |
1478 | { 57600, 2}, | |
1479 | { 115200, 1}, | |
1480 | }; | |
1481 | ||
1482 | /***************************************************************************** | |
1483 | * calc_baud_rate_divisor | |
1484 | * this function calculates the proper baud rate divisor for the specified | |
1485 | * baud rate. | |
1486 | *****************************************************************************/ | |
1487 | static int calc_baud_rate_divisor(int baudrate, int *divisor) | |
1488 | { | |
1489 | int i; | |
1490 | __u16 custom; | |
1491 | __u16 round1; | |
1492 | __u16 round; | |
1493 | ||
1494 | ||
441b62c1 | 1495 | dbg("%s - %d", __func__, baudrate); |
0f64478c GKH |
1496 | |
1497 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1498 | if (divisor_table[i].baudrate == baudrate) { | |
1499 | *divisor = divisor_table[i].divisor; | |
1500 | return 0; | |
1501 | } | |
1502 | } | |
1503 | ||
4da1a17d AC |
1504 | /* After trying for all the standard baud rates * |
1505 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1506 | if (baudrate > 75 && baudrate < 230400) { |
1507 | /* get the divisor */ | |
1508 | custom = (__u16)(230400L / baudrate); | |
1509 | ||
1510 | /* Check for round off */ | |
1511 | round1 = (__u16)(2304000L / baudrate); | |
1512 | round = (__u16)(round1 - (custom * 10)); | |
1513 | if (round > 4) | |
1514 | custom++; | |
1515 | *divisor = custom; | |
1516 | ||
4da1a17d | 1517 | dbg("Baud %d = %d", baudrate, custom); |
0f64478c GKH |
1518 | return 0; |
1519 | } | |
1520 | ||
1521 | dbg("Baud calculation Failed..."); | |
1522 | return -EINVAL; | |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | * send_cmd_write_baud_rate | |
1527 | * this function sends the proper command to change the baud rate of the | |
1528 | * specified port. | |
1529 | */ | |
1530 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1531 | int baudrate) | |
1532 | { | |
1533 | struct usb_serial_port *port; | |
1534 | struct usb_serial *serial; | |
1535 | int divisor; | |
1536 | int status; | |
0f64478c GKH |
1537 | unsigned char number; |
1538 | ||
1539 | if (mos7720_port == NULL) | |
1540 | return -1; | |
1541 | ||
1542 | port = mos7720_port->port; | |
1543 | serial = port->serial; | |
1544 | ||
441b62c1 | 1545 | dbg("%s: Entering ..........", __func__); |
0f64478c GKH |
1546 | |
1547 | number = port->number - port->serial->minor; | |
441b62c1 | 1548 | dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate); |
0f64478c | 1549 | |
4da1a17d | 1550 | /* Calculate the Divisor */ |
0f64478c GKH |
1551 | status = calc_baud_rate_divisor(baudrate, &divisor); |
1552 | if (status) { | |
194343d9 | 1553 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1554 | return status; |
1555 | } | |
1556 | ||
4da1a17d | 1557 | /* Enable access to divisor latch */ |
63b91767 MD |
1558 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1559 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1560 | |
1561 | /* Write the divisor */ | |
63b91767 MD |
1562 | write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
1563 | write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1564 | |
4da1a17d | 1565 | /* Disable access to divisor latch */ |
63b91767 MD |
1566 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
1567 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1568 | |
1569 | return status; | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * change_port_settings | |
1574 | * This routine is called to set the UART on the device to match | |
1575 | * the specified new settings. | |
1576 | */ | |
95da310e AC |
1577 | static void change_port_settings(struct tty_struct *tty, |
1578 | struct moschip_port *mos7720_port, | |
606d099c | 1579 | struct ktermios *old_termios) |
0f64478c GKH |
1580 | { |
1581 | struct usb_serial_port *port; | |
1582 | struct usb_serial *serial; | |
0f64478c GKH |
1583 | int baud; |
1584 | unsigned cflag; | |
1585 | unsigned iflag; | |
1586 | __u8 mask = 0xff; | |
1587 | __u8 lData; | |
1588 | __u8 lParity; | |
1589 | __u8 lStop; | |
1590 | int status; | |
1591 | int port_number; | |
0f64478c GKH |
1592 | |
1593 | if (mos7720_port == NULL) | |
1594 | return ; | |
1595 | ||
1596 | port = mos7720_port->port; | |
1597 | serial = port->serial; | |
1598 | port_number = port->number - port->serial->minor; | |
1599 | ||
441b62c1 | 1600 | dbg("%s - port %d", __func__, port->number); |
0f64478c GKH |
1601 | |
1602 | if (!mos7720_port->open) { | |
441b62c1 | 1603 | dbg("%s - port not opened", __func__); |
0f64478c GKH |
1604 | return; |
1605 | } | |
1606 | ||
441b62c1 | 1607 | dbg("%s: Entering ..........", __func__); |
0f64478c GKH |
1608 | |
1609 | lData = UART_LCR_WLEN8; | |
1610 | lStop = 0x00; /* 1 stop bit */ | |
1611 | lParity = 0x00; /* No parity */ | |
1612 | ||
1613 | cflag = tty->termios->c_cflag; | |
1614 | iflag = tty->termios->c_iflag; | |
1615 | ||
1616 | /* Change the number of bits */ | |
1617 | switch (cflag & CSIZE) { | |
1618 | case CS5: | |
1619 | lData = UART_LCR_WLEN5; | |
1620 | mask = 0x1f; | |
1621 | break; | |
1622 | ||
1623 | case CS6: | |
1624 | lData = UART_LCR_WLEN6; | |
1625 | mask = 0x3f; | |
1626 | break; | |
1627 | ||
1628 | case CS7: | |
1629 | lData = UART_LCR_WLEN7; | |
1630 | mask = 0x7f; | |
1631 | break; | |
1632 | default: | |
1633 | case CS8: | |
1634 | lData = UART_LCR_WLEN8; | |
1635 | break; | |
1636 | } | |
1637 | ||
1638 | /* Change the Parity bit */ | |
1639 | if (cflag & PARENB) { | |
1640 | if (cflag & PARODD) { | |
1641 | lParity = UART_LCR_PARITY; | |
441b62c1 | 1642 | dbg("%s - parity = odd", __func__); |
0f64478c GKH |
1643 | } else { |
1644 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
441b62c1 | 1645 | dbg("%s - parity = even", __func__); |
0f64478c GKH |
1646 | } |
1647 | ||
1648 | } else { | |
441b62c1 | 1649 | dbg("%s - parity = none", __func__); |
0f64478c GKH |
1650 | } |
1651 | ||
1652 | if (cflag & CMSPAR) | |
1653 | lParity = lParity | 0x20; | |
1654 | ||
1655 | /* Change the Stop bit */ | |
1656 | if (cflag & CSTOPB) { | |
1657 | lStop = UART_LCR_STOP; | |
441b62c1 | 1658 | dbg("%s - stop bits = 2", __func__); |
0f64478c GKH |
1659 | } else { |
1660 | lStop = 0x00; | |
441b62c1 | 1661 | dbg("%s - stop bits = 1", __func__); |
0f64478c GKH |
1662 | } |
1663 | ||
1664 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1665 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1666 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1667 | ||
1668 | /* Update the LCR with the correct value */ | |
4da1a17d | 1669 | mos7720_port->shadowLCR &= |
63b91767 | 1670 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1671 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1672 | ||
1673 | ||
1674 | /* Disable Interrupts */ | |
63b91767 MD |
1675 | write_mos_reg(serial, port_number, IER, 0x00); |
1676 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1677 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
0f64478c GKH |
1678 | |
1679 | /* Send the updated LCR value to the mos7720 */ | |
63b91767 MD |
1680 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
1681 | mos7720_port->shadowMCR = 0x0b; | |
1682 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1683 | |
1684 | /* set up the MCR register and send it to the mos7720 */ | |
1685 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1686 | if (cflag & CBAUD) | |
1687 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1688 | ||
1689 | if (cflag & CRTSCTS) { | |
1690 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1691 | /* To set hardware flow control to the specified * |
1692 | * serial port, in SP1/2_CONTROL_REG */ | |
63b91767 MD |
1693 | if (port->number) |
1694 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); | |
1695 | else | |
1696 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); | |
1697 | ||
1698 | } else | |
0f64478c | 1699 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1700 | |
63b91767 | 1701 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
0f64478c GKH |
1702 | |
1703 | /* Determine divisor based on baud rate */ | |
1704 | baud = tty_get_baud_rate(tty); | |
1705 | if (!baud) { | |
1706 | /* pick a default, any default... */ | |
1707 | dbg("Picked default baud..."); | |
1708 | baud = 9600; | |
1709 | } | |
1710 | ||
1711 | if (baud >= 230400) { | |
1712 | set_higher_rates(mos7720_port, baud); | |
1713 | /* Enable Interrupts */ | |
63b91767 | 1714 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1715 | return; |
1716 | } | |
1717 | ||
441b62c1 | 1718 | dbg("%s - baud rate = %d", __func__, baud); |
0f64478c | 1719 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1720 | /* FIXME: needs to write actual resulting baud back not just |
1721 | blindly do so */ | |
1722 | if (cflag & CBAUD) | |
1723 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1724 | /* Enable Interrupts */ |
63b91767 | 1725 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1726 | |
1727 | if (port->read_urb->status != -EINPROGRESS) { | |
0f64478c GKH |
1728 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1729 | if (status) | |
1730 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1731 | status); | |
1732 | } | |
0f64478c GKH |
1733 | } |
1734 | ||
1735 | /* | |
1736 | * mos7720_set_termios | |
1737 | * this function is called by the tty driver when it wants to change the | |
1738 | * termios structure. | |
1739 | */ | |
95da310e AC |
1740 | static void mos7720_set_termios(struct tty_struct *tty, |
1741 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1742 | { |
1743 | int status; | |
1744 | unsigned int cflag; | |
1745 | struct usb_serial *serial; | |
1746 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1747 | |
1748 | serial = port->serial; | |
1749 | ||
1750 | mos7720_port = usb_get_serial_port_data(port); | |
1751 | ||
1752 | if (mos7720_port == NULL) | |
1753 | return; | |
1754 | ||
0f64478c | 1755 | if (!mos7720_port->open) { |
441b62c1 | 1756 | dbg("%s - port not opened", __func__); |
0f64478c GKH |
1757 | return; |
1758 | } | |
1759 | ||
b69578df | 1760 | dbg("%s\n", "setting termios - ASPIRE"); |
0f64478c GKH |
1761 | |
1762 | cflag = tty->termios->c_cflag; | |
1763 | ||
441b62c1 | 1764 | dbg("%s - cflag %08x iflag %08x", __func__, |
0f64478c GKH |
1765 | tty->termios->c_cflag, |
1766 | RELEVANT_IFLAG(tty->termios->c_iflag)); | |
1767 | ||
441b62c1 | 1768 | dbg("%s - old cflag %08x old iflag %08x", __func__, |
65d063ab AC |
1769 | old_termios->c_cflag, |
1770 | RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c | 1771 | |
441b62c1 | 1772 | dbg("%s - port %d", __func__, port->number); |
0f64478c GKH |
1773 | |
1774 | /* change the port settings to the new ones specified */ | |
95da310e | 1775 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1776 | |
4da1a17d | 1777 | if (port->read_urb->status != -EINPROGRESS) { |
0f64478c GKH |
1778 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1779 | if (status) | |
1780 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1781 | status); | |
1782 | } | |
0f64478c GKH |
1783 | } |
1784 | ||
1785 | /* | |
1786 | * get_lsr_info - get line status register info | |
1787 | * | |
1788 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1789 | * is emptied. On bus types like RS485, the transmitter must | |
1790 | * release the bus after transmitting. This must be done when | |
1791 | * the transmit shift register is empty, not be done when the | |
1792 | * transmit holding register is empty. This functionality | |
1793 | * allows an RS485 driver to be written in user space. | |
1794 | */ | |
4da1a17d AC |
1795 | static int get_lsr_info(struct tty_struct *tty, |
1796 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1797 | { |
2f9ea55c | 1798 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1799 | unsigned int result = 0; |
2f9ea55c KS |
1800 | unsigned char data = 0; |
1801 | int port_number = port->number - port->serial->minor; | |
1802 | int count; | |
0f64478c | 1803 | |
95da310e | 1804 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1805 | if (count == 0) { |
63b91767 | 1806 | read_mos_reg(port->serial, port_number, LSR, &data); |
2f9ea55c KS |
1807 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1808 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
1809 | dbg("%s -- Empty", __func__); | |
1810 | result = TIOCSER_TEMT; | |
1811 | } | |
0f64478c | 1812 | } |
0f64478c GKH |
1813 | if (copy_to_user(value, &result, sizeof(int))) |
1814 | return -EFAULT; | |
1815 | return 0; | |
1816 | } | |
1817 | ||
60b33c13 | 1818 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1819 | { |
1820 | struct usb_serial_port *port = tty->driver_data; | |
1821 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1822 | unsigned int result = 0; | |
1823 | unsigned int mcr ; | |
1824 | unsigned int msr ; | |
1825 | ||
1826 | dbg("%s - port %d", __func__, port->number); | |
1827 | ||
1828 | mcr = mos7720_port->shadowMCR; | |
1829 | msr = mos7720_port->shadowMSR; | |
1830 | ||
1831 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1832 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1833 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1834 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1835 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1836 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1837 | ||
1838 | dbg("%s -- %x", __func__, result); | |
1839 | ||
1840 | return result; | |
1841 | } | |
1842 | ||
20b9d177 | 1843 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1844 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1845 | { |
1846 | struct usb_serial_port *port = tty->driver_data; | |
1847 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1848 | unsigned int mcr ; | |
0f608f89 | 1849 | dbg("%s - port %d", __func__, port->number); |
60b33c13 | 1850 | dbg("he was at tiocmset"); |
0f608f89 KS |
1851 | |
1852 | mcr = mos7720_port->shadowMCR; | |
1853 | ||
1854 | if (set & TIOCM_RTS) | |
1855 | mcr |= UART_MCR_RTS; | |
1856 | if (set & TIOCM_DTR) | |
1857 | mcr |= UART_MCR_DTR; | |
1858 | if (set & TIOCM_LOOP) | |
1859 | mcr |= UART_MCR_LOOP; | |
1860 | ||
1861 | if (clear & TIOCM_RTS) | |
1862 | mcr &= ~UART_MCR_RTS; | |
1863 | if (clear & TIOCM_DTR) | |
1864 | mcr &= ~UART_MCR_DTR; | |
1865 | if (clear & TIOCM_LOOP) | |
1866 | mcr &= ~UART_MCR_LOOP; | |
1867 | ||
1868 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1869 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1870 | MCR, mos7720_port->shadowMCR); | |
0f608f89 KS |
1871 | |
1872 | return 0; | |
1873 | } | |
1874 | ||
0bca1b91 AC |
1875 | static int mos7720_get_icount(struct tty_struct *tty, |
1876 | struct serial_icounter_struct *icount) | |
1877 | { | |
1878 | struct usb_serial_port *port = tty->driver_data; | |
1879 | struct moschip_port *mos7720_port; | |
1880 | struct async_icount cnow; | |
1881 | ||
1882 | mos7720_port = usb_get_serial_port_data(port); | |
1883 | cnow = mos7720_port->icount; | |
1884 | ||
1885 | icount->cts = cnow.cts; | |
1886 | icount->dsr = cnow.dsr; | |
1887 | icount->rng = cnow.rng; | |
1888 | icount->dcd = cnow.dcd; | |
1889 | icount->rx = cnow.rx; | |
1890 | icount->tx = cnow.tx; | |
1891 | icount->frame = cnow.frame; | |
1892 | icount->overrun = cnow.overrun; | |
1893 | icount->parity = cnow.parity; | |
1894 | icount->brk = cnow.brk; | |
1895 | icount->buf_overrun = cnow.buf_overrun; | |
1896 | ||
1897 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, | |
1898 | port->number, icount->rx, icount->tx); | |
1899 | return 0; | |
1900 | } | |
1901 | ||
0f64478c GKH |
1902 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1903 | unsigned int __user *value) | |
1904 | { | |
0bca1b91 | 1905 | unsigned int mcr; |
0f64478c | 1906 | unsigned int arg; |
0f64478c GKH |
1907 | |
1908 | struct usb_serial_port *port; | |
1909 | ||
1910 | if (mos7720_port == NULL) | |
1911 | return -1; | |
1912 | ||
4da1a17d | 1913 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1914 | mcr = mos7720_port->shadowMCR; |
1915 | ||
1916 | if (copy_from_user(&arg, value, sizeof(int))) | |
1917 | return -EFAULT; | |
1918 | ||
1919 | switch (cmd) { | |
1920 | case TIOCMBIS: | |
1921 | if (arg & TIOCM_RTS) | |
1922 | mcr |= UART_MCR_RTS; | |
1923 | if (arg & TIOCM_DTR) | |
1924 | mcr |= UART_MCR_RTS; | |
1925 | if (arg & TIOCM_LOOP) | |
1926 | mcr |= UART_MCR_LOOP; | |
1927 | break; | |
1928 | ||
1929 | case TIOCMBIC: | |
1930 | if (arg & TIOCM_RTS) | |
1931 | mcr &= ~UART_MCR_RTS; | |
1932 | if (arg & TIOCM_DTR) | |
1933 | mcr &= ~UART_MCR_RTS; | |
1934 | if (arg & TIOCM_LOOP) | |
1935 | mcr &= ~UART_MCR_LOOP; | |
1936 | break; | |
1937 | ||
0f64478c GKH |
1938 | } |
1939 | ||
1940 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1941 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1942 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1943 | |
1944 | return 0; | |
1945 | } | |
1946 | ||
0f64478c GKH |
1947 | static int get_serial_info(struct moschip_port *mos7720_port, |
1948 | struct serial_struct __user *retinfo) | |
1949 | { | |
1950 | struct serial_struct tmp; | |
1951 | ||
1952 | if (!retinfo) | |
1953 | return -EFAULT; | |
1954 | ||
1955 | memset(&tmp, 0, sizeof(tmp)); | |
1956 | ||
1957 | tmp.type = PORT_16550A; | |
1958 | tmp.line = mos7720_port->port->serial->minor; | |
1959 | tmp.port = mos7720_port->port->number; | |
1960 | tmp.irq = 0; | |
1961 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1962 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1963 | tmp.baud_base = 9600; |
1964 | tmp.close_delay = 5*HZ; | |
1965 | tmp.closing_wait = 30*HZ; | |
1966 | ||
1967 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1968 | return -EFAULT; | |
1969 | return 0; | |
1970 | } | |
1971 | ||
00a0d0d6 | 1972 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1973 | unsigned int cmd, unsigned long arg) |
1974 | { | |
95da310e | 1975 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1976 | struct moschip_port *mos7720_port; |
1977 | struct async_icount cnow; | |
1978 | struct async_icount cprev; | |
0f64478c GKH |
1979 | |
1980 | mos7720_port = usb_get_serial_port_data(port); | |
1981 | if (mos7720_port == NULL) | |
1982 | return -ENODEV; | |
1983 | ||
441b62c1 | 1984 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
0f64478c GKH |
1985 | |
1986 | switch (cmd) { | |
0f64478c | 1987 | case TIOCSERGETLSR: |
441b62c1 | 1988 | dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
4da1a17d AC |
1989 | return get_lsr_info(tty, mos7720_port, |
1990 | (unsigned int __user *)arg); | |
0f64478c | 1991 | |
95da310e | 1992 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1993 | case TIOCMBIS: |
1994 | case TIOCMBIC: | |
4da1a17d AC |
1995 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", |
1996 | __func__, port->number); | |
0f64478c GKH |
1997 | return set_modem_info(mos7720_port, cmd, |
1998 | (unsigned int __user *)arg); | |
1999 | ||
0f64478c | 2000 | case TIOCGSERIAL: |
441b62c1 | 2001 | dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
0f64478c GKH |
2002 | return get_serial_info(mos7720_port, |
2003 | (struct serial_struct __user *)arg); | |
2004 | ||
0f64478c | 2005 | case TIOCMIWAIT: |
441b62c1 | 2006 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
0f64478c GKH |
2007 | cprev = mos7720_port->icount; |
2008 | while (1) { | |
2009 | if (signal_pending(current)) | |
2010 | return -ERESTARTSYS; | |
2011 | cnow = mos7720_port->icount; | |
2012 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2013 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2014 | return -EIO; /* no change => error */ | |
2015 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2016 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2017 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
4da1a17d | 2018 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { |
0f64478c GKH |
2019 | return 0; |
2020 | } | |
2021 | cprev = cnow; | |
2022 | } | |
2023 | /* NOTREACHED */ | |
2024 | break; | |
0f64478c GKH |
2025 | } |
2026 | ||
2027 | return -ENOIOCTLCMD; | |
2028 | } | |
2029 | ||
2030 | static int mos7720_startup(struct usb_serial *serial) | |
2031 | { | |
0f64478c GKH |
2032 | struct moschip_port *mos7720_port; |
2033 | struct usb_device *dev; | |
2034 | int i; | |
2035 | char data; | |
91f58ae6 | 2036 | u16 product; |
b69578df | 2037 | int ret_val; |
0f64478c | 2038 | |
441b62c1 | 2039 | dbg("%s: Entering ..........", __func__); |
0f64478c GKH |
2040 | |
2041 | if (!serial) { | |
2042 | dbg("Invalid Handler"); | |
2043 | return -ENODEV; | |
2044 | } | |
2045 | ||
91f58ae6 | 2046 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
2047 | dev = serial->dev; |
2048 | ||
fb088e33 MD |
2049 | /* |
2050 | * The 7715 uses the first bulk in/out endpoint pair for the parallel | |
2051 | * port, and the second for the serial port. Because the usbserial core | |
2052 | * assumes both pairs are serial ports, we must engage in a bit of | |
2053 | * subterfuge and swap the pointers for ports 0 and 1 in order to make | |
2054 | * port 0 point to the serial port. However, both moschip devices use a | |
2055 | * single interrupt-in endpoint for both ports (as mentioned a little | |
2056 | * further down), and this endpoint was assigned to port 0. So after | |
2057 | * the swap, we must copy the interrupt endpoint elements from port 1 | |
2058 | * (as newly assigned) to port 0, and null out port 1 pointers. | |
2059 | */ | |
2060 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
2061 | struct usb_serial_port *tmp = serial->port[0]; | |
2062 | serial->port[0] = serial->port[1]; | |
2063 | serial->port[1] = tmp; | |
2064 | serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; | |
2065 | serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; | |
2066 | serial->port[0]->interrupt_in_endpointAddress = | |
2067 | tmp->interrupt_in_endpointAddress; | |
2068 | serial->port[1]->interrupt_in_urb = NULL; | |
2069 | serial->port[1]->interrupt_in_buffer = NULL; | |
2070 | } | |
2071 | ||
0f64478c | 2072 | |
b69578df | 2073 | /* set up serial port private structures */ |
0f64478c GKH |
2074 | for (i = 0; i < serial->num_ports; ++i) { |
2075 | mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
2076 | if (mos7720_port == NULL) { | |
194343d9 | 2077 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
0f64478c GKH |
2078 | return -ENOMEM; |
2079 | } | |
2080 | ||
2081 | /* Initialize all port interrupt end point to port 0 int | |
2082 | * endpoint. Our device has only one interrupt endpoint | |
fb088e33 | 2083 | * common to all ports */ |
4da1a17d AC |
2084 | serial->port[i]->interrupt_in_endpointAddress = |
2085 | serial->port[0]->interrupt_in_endpointAddress; | |
0f64478c GKH |
2086 | |
2087 | mos7720_port->port = serial->port[i]; | |
2088 | usb_set_serial_port_data(serial->port[i], mos7720_port); | |
2089 | ||
2090 | dbg("port number is %d", serial->port[i]->number); | |
2091 | dbg("serial number is %d", serial->minor); | |
2092 | } | |
2093 | ||
2094 | ||
2095 | /* setting configuration feature to one */ | |
2096 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
4da1a17d | 2097 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5*HZ); |
0f64478c | 2098 | |
b69578df MD |
2099 | /* start the interrupt urb */ |
2100 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
2101 | if (ret_val) | |
2102 | dev_err(&dev->dev, | |
2103 | "%s - Error %d submitting control urb\n", | |
2104 | __func__, ret_val); | |
2105 | ||
2106 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
2107 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
2108 | ret_val = mos7715_parport_init(serial); | |
2109 | if (ret_val < 0) | |
2110 | return ret_val; | |
2111 | } | |
2112 | #endif | |
4da1a17d | 2113 | /* LSR For Port 1 */ |
63b91767 | 2114 | read_mos_reg(serial, 0, LSR, &data); |
4da1a17d | 2115 | dbg("LSR:%x", data); |
0f64478c GKH |
2116 | |
2117 | return 0; | |
2118 | } | |
2119 | ||
f9c99bb8 | 2120 | static void mos7720_release(struct usb_serial *serial) |
0f64478c GKH |
2121 | { |
2122 | int i; | |
2123 | ||
b69578df MD |
2124 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
2125 | /* close the parallel port */ | |
2126 | ||
2127 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
2128 | == MOSCHIP_DEVICE_ID_7715) { | |
2129 | struct urbtracker *urbtrack; | |
2130 | unsigned long flags; | |
2131 | struct mos7715_parport *mos_parport = | |
2132 | usb_get_serial_data(serial); | |
2133 | ||
2134 | /* prevent NULL ptr dereference in port callbacks */ | |
2135 | spin_lock(&release_lock); | |
2136 | mos_parport->pp->private_data = NULL; | |
2137 | spin_unlock(&release_lock); | |
2138 | ||
2139 | /* wait for synchronous usb calls to return */ | |
2140 | if (mos_parport->msg_pending) | |
2141 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
2142 | MOS_WDR_TIMEOUT); | |
2143 | ||
2144 | parport_remove_port(mos_parport->pp); | |
2145 | usb_set_serial_data(serial, NULL); | |
2146 | mos_parport->serial = NULL; | |
2147 | ||
2148 | /* if tasklet currently scheduled, wait for it to complete */ | |
2149 | tasklet_kill(&mos_parport->urb_tasklet); | |
2150 | ||
2151 | /* unlink any urbs sent by the tasklet */ | |
2152 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
2153 | list_for_each_entry(urbtrack, | |
2154 | &mos_parport->active_urbs, | |
2155 | urblist_entry) | |
2156 | usb_unlink_urb(urbtrack->urb); | |
2157 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
2158 | ||
2159 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
2160 | } | |
2161 | #endif | |
0f64478c | 2162 | /* free private structure allocated for serial port */ |
f9c99bb8 | 2163 | for (i = 0; i < serial->num_ports; ++i) |
0f64478c | 2164 | kfree(usb_get_serial_port_data(serial->port[i])); |
0f64478c GKH |
2165 | } |
2166 | ||
d9b1b787 JH |
2167 | static struct usb_driver usb_driver = { |
2168 | .name = "moschip7720", | |
2169 | .probe = usb_serial_probe, | |
2170 | .disconnect = usb_serial_disconnect, | |
2171 | .id_table = moschip_port_id_table, | |
2172 | .no_dynamic_id = 1, | |
2173 | }; | |
2174 | ||
0f64478c GKH |
2175 | static struct usb_serial_driver moschip7720_2port_driver = { |
2176 | .driver = { | |
2177 | .owner = THIS_MODULE, | |
2178 | .name = "moschip7720", | |
2179 | }, | |
2180 | .description = "Moschip 2 port adapter", | |
d9b1b787 | 2181 | .usb_driver = &usb_driver, |
0f64478c | 2182 | .id_table = moschip_port_id_table, |
fb088e33 | 2183 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2184 | .open = mos7720_open, |
2185 | .close = mos7720_close, | |
2186 | .throttle = mos7720_throttle, | |
2187 | .unthrottle = mos7720_unthrottle, | |
fb088e33 | 2188 | .probe = mos77xx_probe, |
0f64478c | 2189 | .attach = mos7720_startup, |
f9c99bb8 | 2190 | .release = mos7720_release, |
0f64478c | 2191 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2192 | .tiocmget = mos7720_tiocmget, |
2193 | .tiocmset = mos7720_tiocmset, | |
0bca1b91 | 2194 | .get_icount = mos7720_get_icount, |
0f64478c GKH |
2195 | .set_termios = mos7720_set_termios, |
2196 | .write = mos7720_write, | |
2197 | .write_room = mos7720_write_room, | |
2198 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2199 | .break_ctl = mos7720_break, | |
2200 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fb088e33 | 2201 | .read_int_callback = NULL /* dynamically assigned in probe() */ |
0f64478c GKH |
2202 | }; |
2203 | ||
0f64478c GKH |
2204 | static int __init moschip7720_init(void) |
2205 | { | |
2206 | int retval; | |
2207 | ||
441b62c1 | 2208 | dbg("%s: Entering ..........", __func__); |
0f64478c GKH |
2209 | |
2210 | /* Register with the usb serial */ | |
2211 | retval = usb_serial_register(&moschip7720_2port_driver); | |
2212 | if (retval) | |
2213 | goto failed_port_device_register; | |
2214 | ||
c197a8db GKH |
2215 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
2216 | DRIVER_DESC "\n"); | |
0f64478c GKH |
2217 | |
2218 | /* Register with the usb */ | |
2219 | retval = usb_register(&usb_driver); | |
2220 | if (retval) | |
2221 | goto failed_usb_register; | |
2222 | ||
2223 | return 0; | |
2224 | ||
2225 | failed_usb_register: | |
2226 | usb_serial_deregister(&moschip7720_2port_driver); | |
2227 | ||
2228 | failed_port_device_register: | |
2229 | return retval; | |
2230 | } | |
2231 | ||
2232 | static void __exit moschip7720_exit(void) | |
2233 | { | |
2234 | usb_deregister(&usb_driver); | |
2235 | usb_serial_deregister(&moschip7720_2port_driver); | |
2236 | } | |
2237 | ||
2238 | module_init(moschip7720_init); | |
2239 | module_exit(moschip7720_exit); | |
2240 | ||
2241 | /* Module information */ | |
4da1a17d AC |
2242 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2243 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c GKH |
2244 | MODULE_LICENSE("GPL"); |
2245 | ||
2246 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2247 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |