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