Commit | Line | Data |
---|---|---|
0f64478c GKH |
1 | /* |
2 | * mos7720.c | |
3 | * Controls the Moschip 7720 usb to dual port serial convertor | |
4 | * | |
5 | * Copyright 2006 Moschip Semiconductor Tech. Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2 of the License. | |
10 | * | |
11 | * Developed by: | |
50d2dc72 GKH |
12 | * Vijaya Kumar <vijaykumar.gn@gmail.com> |
13 | * Ajay Kumar <naanuajay@yahoo.com> | |
14 | * Gurudeva <ngurudeva@yahoo.com> | |
0f64478c GKH |
15 | * |
16 | * Cleaned up from the original by: | |
17 | * Greg Kroah-Hartman <gregkh@suse.de> | |
18 | * | |
19 | * Originally based on drivers/usb/serial/io_edgeport.c which is: | |
20 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. | |
21 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
22 | */ | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/serial.h> | |
33 | #include <linux/serial_reg.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
4da1a17d | 36 | #include <linux/uaccess.h> |
b69578df | 37 | #include <linux/parport.h> |
0f64478c | 38 | |
0f64478c GKH |
39 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
40 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
41 | ||
42 | /* default urb timeout */ | |
849513a7 | 43 | #define MOS_WDR_TIMEOUT 5000 |
0f64478c | 44 | |
0f64478c GKH |
45 | #define MOS_MAX_PORT 0x02 |
46 | #define MOS_WRITE 0x0E | |
47 | #define MOS_READ 0x0D | |
48 | ||
49 | /* Interrupt Rotinue Defines */ | |
50 | #define SERIAL_IIR_RLS 0x06 | |
51 | #define SERIAL_IIR_RDA 0x04 | |
52 | #define SERIAL_IIR_CTI 0x0c | |
53 | #define SERIAL_IIR_THR 0x02 | |
54 | #define SERIAL_IIR_MS 0x00 | |
55 | ||
56 | #define NUM_URBS 16 /* URB Count */ | |
57 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
58 | ||
b69578df | 59 | /* This structure holds all of the local serial port information */ |
4da1a17d | 60 | struct moschip_port { |
0f64478c GKH |
61 | __u8 shadowLCR; /* last LCR value received */ |
62 | __u8 shadowMCR; /* last MCR value received */ | |
63 | __u8 shadowMSR; /* last MSR value received */ | |
64 | char open; | |
0f64478c GKH |
65 | struct usb_serial_port *port; /* loop back to the owner */ |
66 | struct urb *write_urb_pool[NUM_URBS]; | |
67 | }; | |
68 | ||
0f64478c GKH |
69 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
70 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
71 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
72 | ||
68e24113 | 73 | static const struct usb_device_id id_table[] = { |
4da1a17d | 74 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 75 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
76 | { } /* terminating entry */ |
77 | }; | |
68e24113 | 78 | MODULE_DEVICE_TABLE(usb, id_table); |
0f64478c | 79 | |
b69578df MD |
80 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
81 | ||
82 | /* initial values for parport regs */ | |
83 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
84 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
85 | ||
86 | struct urbtracker { | |
87 | struct mos7715_parport *mos_parport; | |
88 | struct list_head urblist_entry; | |
89 | struct kref ref_count; | |
90 | struct urb *urb; | |
f56852ae | 91 | struct usb_ctrlrequest *setup; |
b69578df MD |
92 | }; |
93 | ||
94 | enum mos7715_pp_modes { | |
95 | SPP = 0<<5, | |
96 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
97 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
98 | }; | |
99 | ||
100 | struct mos7715_parport { | |
101 | struct parport *pp; /* back to containing struct */ | |
102 | struct kref ref_count; /* to instance of this struct */ | |
103 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
104 | struct list_head active_urbs; /* list async urbs in flight */ | |
105 | spinlock_t listlock; /* protects list access */ | |
106 | bool msg_pending; /* usb sync call pending */ | |
107 | struct completion syncmsg_compl; /* usb sync call completed */ | |
108 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
109 | struct usb_serial *serial; /* back to containing struct */ | |
110 | __u8 shadowECR; /* parallel port regs... */ | |
111 | __u8 shadowDCR; | |
112 | atomic_t shadowDSR; /* updated in int-in callback */ | |
113 | }; | |
114 | ||
115 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
116 | static DEFINE_SPINLOCK(release_lock); | |
117 | ||
63b91767 MD |
118 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
119 | ||
120 | static const unsigned int dummy; /* for clarity in register access fns */ | |
121 | ||
b69578df MD |
122 | enum mos_regs { |
123 | THR, /* serial port regs */ | |
124 | RHR, | |
125 | IER, | |
126 | FCR, | |
127 | ISR, | |
128 | LCR, | |
129 | MCR, | |
130 | LSR, | |
131 | MSR, | |
132 | SPR, | |
133 | DLL, | |
134 | DLM, | |
135 | DPR, /* parallel port regs */ | |
136 | DSR, | |
137 | DCR, | |
138 | ECR, | |
139 | SP1_REG, /* device control regs */ | |
140 | SP2_REG, /* serial port 2 (7720 only) */ | |
141 | PP_REG, | |
142 | SP_CONTROL_REG, | |
143 | }; | |
144 | ||
145 | /* | |
146 | * Return the correct value for the Windex field of the setup packet | |
147 | * for a control endpoint message. See the 7715 datasheet. | |
148 | */ | |
149 | static inline __u16 get_reg_index(enum mos_regs reg) | |
150 | { | |
151 | static const __u16 mos7715_index_lookup_table[] = { | |
152 | 0x00, /* THR */ | |
153 | 0x00, /* RHR */ | |
154 | 0x01, /* IER */ | |
155 | 0x02, /* FCR */ | |
156 | 0x02, /* ISR */ | |
157 | 0x03, /* LCR */ | |
158 | 0x04, /* MCR */ | |
159 | 0x05, /* LSR */ | |
160 | 0x06, /* MSR */ | |
161 | 0x07, /* SPR */ | |
162 | 0x00, /* DLL */ | |
163 | 0x01, /* DLM */ | |
164 | 0x00, /* DPR */ | |
165 | 0x01, /* DSR */ | |
166 | 0x02, /* DCR */ | |
167 | 0x0a, /* ECR */ | |
168 | 0x01, /* SP1_REG */ | |
169 | 0x02, /* SP2_REG (7720 only) */ | |
170 | 0x04, /* PP_REG (7715 only) */ | |
171 | 0x08, /* SP_CONTROL_REG */ | |
172 | }; | |
173 | return mos7715_index_lookup_table[reg]; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Return the correct value for the upper byte of the Wvalue field of | |
178 | * the setup packet for a control endpoint message. | |
179 | */ | |
63b91767 MD |
180 | static inline __u16 get_reg_value(enum mos_regs reg, |
181 | unsigned int serial_portnum) | |
b69578df MD |
182 | { |
183 | if (reg >= SP1_REG) /* control reg */ | |
184 | return 0x0000; | |
63b91767 MD |
185 | |
186 | else if (reg >= DPR) /* parallel port reg (7715 only) */ | |
b69578df | 187 | return 0x0100; |
63b91767 MD |
188 | |
189 | else /* serial port reg */ | |
190 | return (serial_portnum + 2) << 8; | |
b69578df MD |
191 | } |
192 | ||
193 | /* | |
194 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
195 | * the value field of the setup packet. serial_portnum is ignored for registers |
196 | * not specific to a particular serial port. | |
b69578df | 197 | */ |
63b91767 MD |
198 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
199 | enum mos_regs reg, __u8 data) | |
b69578df | 200 | { |
b69578df MD |
201 | struct usb_device *usbdev = serial->dev; |
202 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
203 | __u8 request = (__u8)0x0e; | |
204 | __u8 requesttype = (__u8)0x40; | |
b69578df | 205 | __u16 index = get_reg_index(reg); |
63b91767 MD |
206 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
207 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
208 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
209 | if (status < 0) |
210 | dev_err(&usbdev->dev, | |
211 | "mos7720: usb_control_msg() failed: %d", status); | |
212 | return status; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
217 | * device is embedded in the value field of the setup packet. serial_portnum is |
218 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 219 | */ |
63b91767 MD |
220 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
221 | enum mos_regs reg, __u8 *data) | |
b69578df | 222 | { |
63b91767 | 223 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
224 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
225 | __u8 request = (__u8)0x0d; | |
226 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 227 | __u16 index = get_reg_index(reg); |
63b91767 | 228 | __u16 value = get_reg_value(reg, serial_portnum); |
72ea18a5 JH |
229 | u8 *buf; |
230 | int status; | |
231 | ||
232 | buf = kmalloc(1, GFP_KERNEL); | |
233 | if (!buf) | |
234 | return -ENOMEM; | |
235 | ||
236 | status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
237 | index, buf, 1, MOS_WDR_TIMEOUT); | |
238 | if (status == 1) | |
239 | *data = *buf; | |
240 | else if (status < 0) | |
b69578df MD |
241 | dev_err(&usbdev->dev, |
242 | "mos7720: usb_control_msg() failed: %d", status); | |
72ea18a5 JH |
243 | kfree(buf); |
244 | ||
b69578df MD |
245 | return status; |
246 | } | |
247 | ||
63b91767 MD |
248 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
249 | ||
b69578df MD |
250 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
251 | enum mos7715_pp_modes mode) | |
252 | { | |
253 | mos_parport->shadowECR = mode; | |
63b91767 | 254 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
255 | return 0; |
256 | } | |
257 | ||
258 | static void destroy_mos_parport(struct kref *kref) | |
259 | { | |
260 | struct mos7715_parport *mos_parport = | |
261 | container_of(kref, struct mos7715_parport, ref_count); | |
262 | ||
b69578df MD |
263 | kfree(mos_parport); |
264 | } | |
265 | ||
266 | static void destroy_urbtracker(struct kref *kref) | |
267 | { | |
268 | struct urbtracker *urbtrack = | |
269 | container_of(kref, struct urbtracker, ref_count); | |
270 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 271 | |
b69578df | 272 | usb_free_urb(urbtrack->urb); |
f56852ae | 273 | kfree(urbtrack->setup); |
b69578df MD |
274 | kfree(urbtrack); |
275 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
276 | } | |
277 | ||
278 | /* | |
279 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
280 | * port callback had to be deferred because the disconnect mutex could not be | |
281 | * obtained at the time. | |
282 | */ | |
283 | static void send_deferred_urbs(unsigned long _mos_parport) | |
284 | { | |
285 | int ret_val; | |
286 | unsigned long flags; | |
287 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 288 | struct urbtracker *urbtrack, *tmp; |
b69578df | 289 | struct list_head *cursor, *next; |
9eecf808 | 290 | struct device *dev; |
b69578df | 291 | |
b69578df MD |
292 | /* if release function ran, game over */ |
293 | if (unlikely(mos_parport->serial == NULL)) | |
294 | return; | |
295 | ||
9eecf808 GKH |
296 | dev = &mos_parport->serial->dev->dev; |
297 | ||
b69578df MD |
298 | /* try again to get the mutex */ |
299 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 300 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
301 | tasklet_schedule(&mos_parport->urb_tasklet); |
302 | return; | |
303 | } | |
304 | ||
305 | /* if device disconnected, game over */ | |
306 | if (unlikely(mos_parport->serial->disconnected)) { | |
307 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
308 | return; | |
309 | } | |
310 | ||
311 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
312 | if (list_empty(&mos_parport->deferred_urbs)) { | |
313 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
314 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 315 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
316 | return; |
317 | } | |
318 | ||
319 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
320 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
321 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 322 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
323 | urblist_entry) { |
324 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 325 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 326 | if (ret_val) { |
9eecf808 | 327 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
328 | list_del(&urbtrack->urblist_entry); |
329 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
330 | } | |
331 | } | |
332 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
333 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
334 | } | |
335 | ||
336 | /* callback for parallel port control urbs submitted asynchronously */ | |
337 | static void async_complete(struct urb *urb) | |
338 | { | |
339 | struct urbtracker *urbtrack = urb->context; | |
340 | int status = urb->status; | |
ca09907d | 341 | |
b69578df | 342 | if (unlikely(status)) |
9eecf808 | 343 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
344 | |
345 | /* remove the urbtracker from the active_urbs list */ | |
346 | spin_lock(&urbtrack->mos_parport->listlock); | |
347 | list_del(&urbtrack->urblist_entry); | |
348 | spin_unlock(&urbtrack->mos_parport->listlock); | |
349 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
350 | } | |
351 | ||
352 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
353 | enum mos_regs reg, __u8 data) | |
354 | { | |
355 | struct urbtracker *urbtrack; | |
356 | int ret_val; | |
357 | unsigned long flags; | |
b69578df MD |
358 | struct usb_serial *serial = mos_parport->serial; |
359 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
360 | |
361 | /* create and initialize the control urb and containing urbtracker */ | |
362 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
363 | if (urbtrack == NULL) { | |
364 | dev_err(&usbdev->dev, "out of memory"); | |
365 | return -ENOMEM; | |
366 | } | |
367 | kref_get(&mos_parport->ref_count); | |
368 | urbtrack->mos_parport = mos_parport; | |
369 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
370 | if (urbtrack->urb == NULL) { | |
371 | dev_err(&usbdev->dev, "out of urbs"); | |
372 | kfree(urbtrack); | |
373 | return -ENOMEM; | |
374 | } | |
37657621 | 375 | urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); |
f56852ae JH |
376 | if (!urbtrack->setup) { |
377 | usb_free_urb(urbtrack->urb); | |
378 | kfree(urbtrack); | |
379 | return -ENOMEM; | |
380 | } | |
381 | urbtrack->setup->bRequestType = (__u8)0x40; | |
382 | urbtrack->setup->bRequest = (__u8)0x0e; | |
7965eef8 JH |
383 | urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); |
384 | urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); | |
f56852ae | 385 | urbtrack->setup->wLength = 0; |
b69578df MD |
386 | usb_fill_control_urb(urbtrack->urb, usbdev, |
387 | usb_sndctrlpipe(usbdev, 0), | |
f56852ae | 388 | (unsigned char *)urbtrack->setup, |
b69578df MD |
389 | NULL, 0, async_complete, urbtrack); |
390 | kref_init(&urbtrack->ref_count); | |
391 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
392 | ||
393 | /* | |
394 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
395 | * and schedule a tasklet to try again later | |
396 | */ | |
397 | if (!mutex_trylock(&serial->disc_mutex)) { | |
398 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
399 | list_add_tail(&urbtrack->urblist_entry, | |
400 | &mos_parport->deferred_urbs); | |
401 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
402 | tasklet_schedule(&mos_parport->urb_tasklet); | |
9eecf808 | 403 | dev_dbg(&usbdev->dev, "tasklet scheduled"); |
b69578df MD |
404 | return 0; |
405 | } | |
406 | ||
407 | /* bail if device disconnected */ | |
408 | if (serial->disconnected) { | |
409 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
410 | mutex_unlock(&serial->disc_mutex); | |
411 | return -ENODEV; | |
412 | } | |
413 | ||
414 | /* add the tracker to the active_urbs list and submit */ | |
415 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
416 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
417 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
418 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
419 | mutex_unlock(&serial->disc_mutex); | |
420 | if (ret_val) { | |
421 | dev_err(&usbdev->dev, | |
422 | "%s: submit_urb() failed: %d", __func__, ret_val); | |
423 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
424 | list_del(&urbtrack->urblist_entry); | |
425 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
426 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
427 | return ret_val; | |
428 | } | |
429 | return 0; | |
430 | } | |
431 | ||
432 | /* | |
433 | * This is the the common top part of all parallel port callback operations that | |
434 | * send synchronous messages to the device. This implements convoluted locking | |
435 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
436 | * has called our release function, at which point struct mos7715_parport has | |
437 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
438 | * not called the release function yet because someone has a serial port open. | |
439 | * The shared release_lock prevents the first, and the mutex and disconnected | |
440 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
441 | * flag to ensure that all synchronous usb messgage calls have completed before | |
442 | * our release function can return. | |
443 | */ | |
444 | static int parport_prologue(struct parport *pp) | |
445 | { | |
446 | struct mos7715_parport *mos_parport; | |
447 | ||
448 | spin_lock(&release_lock); | |
449 | mos_parport = pp->private_data; | |
450 | if (unlikely(mos_parport == NULL)) { | |
451 | /* release fn called, port struct destroyed */ | |
452 | spin_unlock(&release_lock); | |
453 | return -1; | |
454 | } | |
455 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
456 | INIT_COMPLETION(mos_parport->syncmsg_compl); | |
457 | spin_unlock(&release_lock); | |
458 | ||
459 | mutex_lock(&mos_parport->serial->disc_mutex); | |
460 | if (mos_parport->serial->disconnected) { | |
461 | /* device disconnected */ | |
462 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
463 | mos_parport->msg_pending = false; | |
464 | complete(&mos_parport->syncmsg_compl); | |
465 | return -1; | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | /* | |
472 | * This is the the common bottom part of all parallel port functions that send | |
473 | * synchronous messages to the device. | |
474 | */ | |
475 | static inline void parport_epilogue(struct parport *pp) | |
476 | { | |
477 | struct mos7715_parport *mos_parport = pp->private_data; | |
478 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
479 | mos_parport->msg_pending = false; | |
480 | complete(&mos_parport->syncmsg_compl); | |
481 | } | |
482 | ||
483 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
484 | { | |
485 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 486 | |
b69578df MD |
487 | if (parport_prologue(pp) < 0) |
488 | return; | |
489 | mos7715_change_mode(mos_parport, SPP); | |
63b91767 | 490 | write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d); |
b69578df MD |
491 | parport_epilogue(pp); |
492 | } | |
493 | ||
494 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
495 | { | |
496 | struct mos7715_parport *mos_parport = pp->private_data; | |
497 | unsigned char d; | |
ca09907d | 498 | |
b69578df MD |
499 | if (parport_prologue(pp) < 0) |
500 | return 0; | |
63b91767 | 501 | read_mos_reg(mos_parport->serial, dummy, DPR, &d); |
b69578df MD |
502 | parport_epilogue(pp); |
503 | return d; | |
504 | } | |
505 | ||
506 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
507 | { | |
508 | struct mos7715_parport *mos_parport = pp->private_data; | |
509 | __u8 data; | |
ca09907d | 510 | |
b69578df MD |
511 | if (parport_prologue(pp) < 0) |
512 | return; | |
513 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
63b91767 | 514 | write_mos_reg(mos_parport->serial, dummy, DCR, data); |
b69578df MD |
515 | mos_parport->shadowDCR = data; |
516 | parport_epilogue(pp); | |
517 | } | |
518 | ||
519 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
520 | { | |
521 | struct mos7715_parport *mos_parport = pp->private_data; | |
522 | __u8 dcr; | |
ca09907d | 523 | |
b69578df MD |
524 | spin_lock(&release_lock); |
525 | mos_parport = pp->private_data; | |
526 | if (unlikely(mos_parport == NULL)) { | |
527 | spin_unlock(&release_lock); | |
528 | return 0; | |
529 | } | |
530 | dcr = mos_parport->shadowDCR & 0x0f; | |
531 | spin_unlock(&release_lock); | |
532 | return dcr; | |
533 | } | |
534 | ||
535 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
536 | unsigned char mask, | |
537 | unsigned char val) | |
538 | { | |
539 | struct mos7715_parport *mos_parport = pp->private_data; | |
540 | __u8 dcr; | |
ca09907d | 541 | |
b69578df MD |
542 | mask &= 0x0f; |
543 | val &= 0x0f; | |
544 | if (parport_prologue(pp) < 0) | |
545 | return 0; | |
546 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
63b91767 | 547 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
548 | dcr = mos_parport->shadowDCR & 0x0f; |
549 | parport_epilogue(pp); | |
550 | return dcr; | |
551 | } | |
552 | ||
553 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
554 | { | |
555 | unsigned char status; | |
556 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 557 | |
b69578df MD |
558 | spin_lock(&release_lock); |
559 | mos_parport = pp->private_data; | |
560 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
561 | spin_unlock(&release_lock); | |
562 | return 0; | |
563 | } | |
564 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
565 | spin_unlock(&release_lock); | |
566 | return status; | |
567 | } | |
568 | ||
569 | static void parport_mos7715_enable_irq(struct parport *pp) | |
570 | { | |
b69578df | 571 | } |
ca09907d | 572 | |
b69578df MD |
573 | static void parport_mos7715_disable_irq(struct parport *pp) |
574 | { | |
b69578df MD |
575 | } |
576 | ||
577 | static void parport_mos7715_data_forward(struct parport *pp) | |
578 | { | |
579 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 580 | |
b69578df MD |
581 | if (parport_prologue(pp) < 0) |
582 | return; | |
583 | mos7715_change_mode(mos_parport, PS2); | |
584 | mos_parport->shadowDCR &= ~0x20; | |
63b91767 | 585 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
586 | parport_epilogue(pp); |
587 | } | |
588 | ||
589 | static void parport_mos7715_data_reverse(struct parport *pp) | |
590 | { | |
591 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 592 | |
b69578df MD |
593 | if (parport_prologue(pp) < 0) |
594 | return; | |
595 | mos7715_change_mode(mos_parport, PS2); | |
596 | mos_parport->shadowDCR |= 0x20; | |
63b91767 | 597 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
598 | parport_epilogue(pp); |
599 | } | |
600 | ||
601 | static void parport_mos7715_init_state(struct pardevice *dev, | |
602 | struct parport_state *s) | |
603 | { | |
b69578df MD |
604 | s->u.pc.ctr = DCR_INIT_VAL; |
605 | s->u.pc.ecr = ECR_INIT_VAL; | |
606 | } | |
607 | ||
608 | /* N.B. Parport core code requires that this function not block */ | |
609 | static void parport_mos7715_save_state(struct parport *pp, | |
610 | struct parport_state *s) | |
611 | { | |
612 | struct mos7715_parport *mos_parport; | |
ca09907d | 613 | |
b69578df MD |
614 | spin_lock(&release_lock); |
615 | mos_parport = pp->private_data; | |
616 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
617 | spin_unlock(&release_lock); | |
618 | return; | |
619 | } | |
620 | s->u.pc.ctr = mos_parport->shadowDCR; | |
621 | s->u.pc.ecr = mos_parport->shadowECR; | |
622 | spin_unlock(&release_lock); | |
623 | } | |
624 | ||
625 | /* N.B. Parport core code requires that this function not block */ | |
626 | static void parport_mos7715_restore_state(struct parport *pp, | |
627 | struct parport_state *s) | |
628 | { | |
629 | struct mos7715_parport *mos_parport; | |
ca09907d | 630 | |
b69578df MD |
631 | spin_lock(&release_lock); |
632 | mos_parport = pp->private_data; | |
633 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
634 | spin_unlock(&release_lock); | |
635 | return; | |
636 | } | |
637 | write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); | |
638 | write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); | |
639 | spin_unlock(&release_lock); | |
640 | } | |
641 | ||
642 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
643 | const void *buffer, | |
644 | size_t len, int flags) | |
645 | { | |
646 | int retval; | |
647 | struct mos7715_parport *mos_parport = pp->private_data; | |
648 | int actual_len; | |
ca09907d | 649 | |
b69578df MD |
650 | if (parport_prologue(pp) < 0) |
651 | return 0; | |
652 | mos7715_change_mode(mos_parport, PPF); | |
653 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
654 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
655 | (void *)buffer, len, &actual_len, | |
656 | MOS_WDR_TIMEOUT); | |
657 | parport_epilogue(pp); | |
658 | if (retval) { | |
659 | dev_err(&mos_parport->serial->dev->dev, | |
660 | "mos7720: usb_bulk_msg() failed: %d", retval); | |
661 | return 0; | |
662 | } | |
663 | return actual_len; | |
664 | } | |
665 | ||
666 | static struct parport_operations parport_mos7715_ops = { | |
667 | .owner = THIS_MODULE, | |
668 | .write_data = parport_mos7715_write_data, | |
669 | .read_data = parport_mos7715_read_data, | |
670 | ||
671 | .write_control = parport_mos7715_write_control, | |
672 | .read_control = parport_mos7715_read_control, | |
673 | .frob_control = parport_mos7715_frob_control, | |
674 | ||
675 | .read_status = parport_mos7715_read_status, | |
676 | ||
677 | .enable_irq = parport_mos7715_enable_irq, | |
678 | .disable_irq = parport_mos7715_disable_irq, | |
679 | ||
680 | .data_forward = parport_mos7715_data_forward, | |
681 | .data_reverse = parport_mos7715_data_reverse, | |
682 | ||
683 | .init_state = parport_mos7715_init_state, | |
684 | .save_state = parport_mos7715_save_state, | |
685 | .restore_state = parport_mos7715_restore_state, | |
686 | ||
687 | .compat_write_data = parport_mos7715_write_compat, | |
688 | ||
689 | .nibble_read_data = parport_ieee1284_read_nibble, | |
690 | .byte_read_data = parport_ieee1284_read_byte, | |
691 | }; | |
692 | ||
693 | /* | |
694 | * Allocate and initialize parallel port control struct, initialize | |
695 | * the parallel port hardware device, and register with the parport subsystem. | |
696 | */ | |
697 | static int mos7715_parport_init(struct usb_serial *serial) | |
698 | { | |
699 | struct mos7715_parport *mos_parport; | |
700 | ||
701 | /* allocate and initialize parallel port control struct */ | |
702 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
703 | if (mos_parport == NULL) { | |
9eecf808 | 704 | dev_dbg(&serial->dev->dev, "%s: kzalloc failed\n", __func__); |
b69578df MD |
705 | return -ENOMEM; |
706 | } | |
707 | mos_parport->msg_pending = false; | |
708 | kref_init(&mos_parport->ref_count); | |
709 | spin_lock_init(&mos_parport->listlock); | |
710 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
711 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
712 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
713 | mos_parport->serial = serial; | |
714 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
715 | (unsigned long) mos_parport); | |
716 | init_completion(&mos_parport->syncmsg_compl); | |
717 | ||
718 | /* cycle parallel port reset bit */ | |
63b91767 MD |
719 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
720 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); | |
b69578df MD |
721 | |
722 | /* initialize device registers */ | |
723 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
63b91767 | 724 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df | 725 | mos_parport->shadowECR = ECR_INIT_VAL; |
63b91767 | 726 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
727 | |
728 | /* register with parport core */ | |
729 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
730 | PARPORT_DMA_NONE, | |
731 | &parport_mos7715_ops); | |
732 | if (mos_parport->pp == NULL) { | |
733 | dev_err(&serial->interface->dev, | |
734 | "Could not register parport\n"); | |
735 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
736 | return -EIO; | |
737 | } | |
738 | mos_parport->pp->private_data = mos_parport; | |
739 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
740 | mos_parport->pp->dev = &serial->interface->dev; | |
741 | parport_announce_port(mos_parport->pp); | |
742 | ||
743 | return 0; | |
744 | } | |
745 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
746 | |
747 | /* | |
748 | * mos7720_interrupt_callback | |
749 | * this is the callback function for when we have received data on the | |
750 | * interrupt endpoint. | |
751 | */ | |
752 | static void mos7720_interrupt_callback(struct urb *urb) | |
753 | { | |
754 | int result; | |
755 | int length; | |
81105984 | 756 | int status = urb->status; |
9eecf808 | 757 | struct device *dev = &urb->dev->dev; |
325b70c2 | 758 | __u8 *data; |
0f64478c GKH |
759 | __u8 sp1; |
760 | __u8 sp2; | |
0f64478c | 761 | |
81105984 | 762 | switch (status) { |
0f64478c GKH |
763 | case 0: |
764 | /* success */ | |
765 | break; | |
766 | case -ECONNRESET: | |
767 | case -ENOENT: | |
768 | case -ESHUTDOWN: | |
769 | /* this urb is terminated, clean up */ | |
9eecf808 | 770 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
771 | return; |
772 | default: | |
9eecf808 | 773 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
774 | goto exit; |
775 | } | |
776 | ||
777 | length = urb->actual_length; | |
778 | data = urb->transfer_buffer; | |
779 | ||
780 | /* Moschip get 4 bytes | |
781 | * Byte 1 IIR Port 1 (port.number is 0) | |
782 | * Byte 2 IIR Port 2 (port.number is 1) | |
783 | * Byte 3 -------------- | |
784 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
785 | |
786 | /* the above description is inverted | |
787 | * oneukum 2007-03-14 */ | |
788 | ||
789 | if (unlikely(length != 4)) { | |
9eecf808 | 790 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
791 | return; |
792 | } | |
793 | ||
325b70c2 ON |
794 | sp1 = data[3]; |
795 | sp2 = data[2]; | |
0f64478c | 796 | |
325b70c2 | 797 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 798 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 799 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
800 | } else { |
801 | switch (sp1 & 0x0f) { | |
802 | case SERIAL_IIR_RLS: | |
9eecf808 | 803 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
804 | break; |
805 | case SERIAL_IIR_CTI: | |
9eecf808 | 806 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
807 | break; |
808 | case SERIAL_IIR_MS: | |
9eecf808 | 809 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
810 | break; |
811 | } | |
812 | ||
813 | switch (sp2 & 0x0f) { | |
814 | case SERIAL_IIR_RLS: | |
9eecf808 | 815 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
816 | break; |
817 | case SERIAL_IIR_CTI: | |
9eecf808 | 818 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
819 | break; |
820 | case SERIAL_IIR_MS: | |
9eecf808 | 821 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
822 | break; |
823 | } | |
824 | } | |
825 | ||
826 | exit: | |
827 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
828 | if (result) | |
9eecf808 | 829 | dev_err(dev, "%s - Error %d submitting control urb\n", __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; | |
9eecf808 | 842 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
843 | __u8 *data; |
844 | __u8 iir; | |
845 | ||
846 | switch (status) { | |
847 | case 0: | |
848 | /* success */ | |
849 | break; | |
850 | case -ECONNRESET: | |
851 | case -ENOENT: | |
852 | case -ESHUTDOWN: | |
b69578df | 853 | case -ENODEV: |
fb088e33 | 854 | /* this urb is terminated, clean up */ |
9eecf808 | 855 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
856 | return; |
857 | default: | |
9eecf808 | 858 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
859 | goto exit; |
860 | } | |
861 | ||
862 | length = urb->actual_length; | |
863 | data = urb->transfer_buffer; | |
864 | ||
865 | /* Structure of data from 7715 device: | |
866 | * Byte 1: IIR serial Port | |
867 | * Byte 2: unused | |
868 | * Byte 2: DSR parallel port | |
869 | * Byte 4: FIFO status for both */ | |
870 | ||
871 | if (unlikely(length != 4)) { | |
9eecf808 | 872 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
873 | return; |
874 | } | |
875 | ||
876 | iir = data[0]; | |
877 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
878 | switch (iir & 0x0f) { | |
879 | case SERIAL_IIR_RLS: | |
9eecf808 | 880 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n\n"); |
fb088e33 MD |
881 | break; |
882 | case SERIAL_IIR_CTI: | |
9eecf808 | 883 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
884 | break; |
885 | case SERIAL_IIR_MS: | |
9eecf808 | 886 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
887 | break; |
888 | } | |
889 | } | |
890 | ||
b69578df MD |
891 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
892 | { /* update local copy of DSR reg */ | |
893 | struct usb_serial_port *port = urb->context; | |
894 | struct mos7715_parport *mos_parport = port->serial->private; | |
895 | if (unlikely(mos_parport == NULL)) | |
896 | return; | |
897 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
898 | } | |
899 | #endif | |
900 | ||
fb088e33 MD |
901 | exit: |
902 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
903 | if (result) | |
9eecf808 | 904 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
905 | } |
906 | ||
0f64478c GKH |
907 | /* |
908 | * mos7720_bulk_in_callback | |
909 | * this is the callback function for when we have received data on the | |
910 | * bulk in endpoint. | |
911 | */ | |
912 | static void mos7720_bulk_in_callback(struct urb *urb) | |
913 | { | |
81105984 | 914 | int retval; |
0f64478c GKH |
915 | unsigned char *data ; |
916 | struct usb_serial_port *port; | |
81105984 | 917 | int status = urb->status; |
0f64478c | 918 | |
81105984 | 919 | if (status) { |
9eecf808 | 920 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
921 | return; |
922 | } | |
923 | ||
b69578df | 924 | port = urb->context; |
0f64478c | 925 | |
9eecf808 | 926 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
927 | |
928 | data = urb->transfer_buffer; | |
929 | ||
2e124b4a | 930 | if (urb->actual_length) { |
05c7cd39 | 931 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 932 | tty_flip_buffer_push(&port->port); |
0f64478c GKH |
933 | } |
934 | ||
0f64478c | 935 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
936 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
937 | if (retval) | |
9eecf808 | 938 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
939 | } |
940 | } | |
941 | ||
942 | /* | |
943 | * mos7720_bulk_out_data_callback | |
944 | * this is the callback function for when we have finished sending serial | |
945 | * data on the bulk out endpoint. | |
946 | */ | |
947 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
948 | { | |
949 | struct moschip_port *mos7720_port; | |
81105984 | 950 | int status = urb->status; |
0f64478c | 951 | |
81105984 | 952 | if (status) { |
9eecf808 | 953 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
954 | return; |
955 | } | |
956 | ||
957 | mos7720_port = urb->context; | |
958 | if (!mos7720_port) { | |
9eecf808 | 959 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
960 | return ; |
961 | } | |
962 | ||
6aad04f2 JS |
963 | if (mos7720_port->open) |
964 | tty_port_tty_wakeup(&mos7720_port->port->port); | |
0f64478c GKH |
965 | } |
966 | ||
fb088e33 MD |
967 | static int mos77xx_calc_num_ports(struct usb_serial *serial) |
968 | { | |
969 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
970 | if (product == MOSCHIP_DEVICE_ID_7715) | |
971 | return 1; | |
972 | ||
973 | return 2; | |
974 | } | |
975 | ||
a509a7e4 | 976 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
977 | { |
978 | struct usb_serial *serial; | |
0f64478c | 979 | struct urb *urb; |
0f64478c GKH |
980 | struct moschip_port *mos7720_port; |
981 | int response; | |
982 | int port_number; | |
63b91767 | 983 | __u8 data; |
fe4b65ec | 984 | int allocated_urbs = 0; |
0f64478c GKH |
985 | int j; |
986 | ||
987 | serial = port->serial; | |
988 | ||
989 | mos7720_port = usb_get_serial_port_data(port); | |
990 | if (mos7720_port == NULL) | |
991 | return -ENODEV; | |
992 | ||
0f64478c GKH |
993 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
994 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
995 | ||
996 | /* Initialising the write urb pool */ | |
997 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 998 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c GKH |
999 | mos7720_port->write_urb_pool[j] = urb; |
1000 | ||
1001 | if (urb == NULL) { | |
194343d9 | 1002 | dev_err(&port->dev, "No more urbs???\n"); |
0f64478c GKH |
1003 | continue; |
1004 | } | |
1005 | ||
1006 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1007 | GFP_KERNEL); | |
1008 | if (!urb->transfer_buffer) { | |
194343d9 GKH |
1009 | dev_err(&port->dev, |
1010 | "%s-out of memory for urb buffers.\n", | |
1011 | __func__); | |
fe4b65ec ON |
1012 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1013 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1014 | continue; |
1015 | } | |
fe4b65ec | 1016 | allocated_urbs++; |
0f64478c GKH |
1017 | } |
1018 | ||
fe4b65ec ON |
1019 | if (!allocated_urbs) |
1020 | return -ENOMEM; | |
1021 | ||
0f64478c GKH |
1022 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1023 | * | |
1024 | * Register Index | |
2f9ea55c | 1025 | * 0 : THR/RHR |
0f64478c GKH |
1026 | * 1 : IER |
1027 | * 2 : FCR | |
1028 | * 3 : LCR | |
1029 | * 4 : MCR | |
2f9ea55c KS |
1030 | * 5 : LSR |
1031 | * 6 : MSR | |
1032 | * 7 : SPR | |
0f64478c GKH |
1033 | * |
1034 | * 0x08 : SP1/2 Control Reg | |
1035 | */ | |
1036 | port_number = port->number - port->serial->minor; | |
63b91767 MD |
1037 | read_mos_reg(serial, port_number, LSR, &data); |
1038 | ||
9eecf808 | 1039 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1040 | |
63b91767 MD |
1041 | write_mos_reg(serial, dummy, SP1_REG, 0x02); |
1042 | write_mos_reg(serial, dummy, SP2_REG, 0x02); | |
0f64478c | 1043 | |
63b91767 MD |
1044 | write_mos_reg(serial, port_number, IER, 0x00); |
1045 | write_mos_reg(serial, port_number, FCR, 0x00); | |
0f64478c | 1046 | |
63b91767 MD |
1047 | write_mos_reg(serial, port_number, FCR, 0xcf); |
1048 | mos7720_port->shadowLCR = 0x03; | |
1049 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1050 | mos7720_port->shadowMCR = 0x0b; | |
1051 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1052 | |
63b91767 MD |
1053 | write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
1054 | read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); | |
0f64478c | 1055 | data = data | (port->number - port->serial->minor + 1); |
63b91767 MD |
1056 | write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
1057 | mos7720_port->shadowLCR = 0x83; | |
1058 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1059 | write_mos_reg(serial, port_number, THR, 0x0c); | |
1060 | write_mos_reg(serial, port_number, IER, 0x00); | |
1061 | mos7720_port->shadowLCR = 0x03; | |
1062 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1063 | write_mos_reg(serial, port_number, IER, 0x0c); | |
0f64478c | 1064 | |
0f64478c GKH |
1065 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1066 | if (response) | |
4da1a17d AC |
1067 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1068 | __func__, response); | |
0f64478c | 1069 | |
0f64478c GKH |
1070 | /* initialize our port settings */ |
1071 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1072 | ||
1073 | /* send a open port command */ | |
1074 | mos7720_port->open = 1; | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * mos7720_chars_in_buffer | |
1081 | * this function is called by the tty driver when it wants to know how many | |
1082 | * bytes of data we currently have outstanding in the port (data that has | |
1083 | * been written, but hasn't made it out the port yet) | |
1084 | * If successful, we return the number of bytes left to be written in the | |
1085 | * system, | |
1086 | * Otherwise we return a negative error number. | |
1087 | */ | |
95da310e | 1088 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1089 | { |
95da310e | 1090 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1091 | int i; |
1092 | int chars = 0; | |
1093 | struct moschip_port *mos7720_port; | |
1094 | ||
0f64478c | 1095 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1096 | if (mos7720_port == NULL) |
23198fda | 1097 | return 0; |
0f64478c GKH |
1098 | |
1099 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1100 | if (mos7720_port->write_urb_pool[i] && |
1101 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1102 | chars += URB_TRANSFER_BUFFER_SIZE; |
1103 | } | |
9eecf808 | 1104 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0f64478c GKH |
1105 | return chars; |
1106 | } | |
1107 | ||
335f8514 | 1108 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1109 | { |
1110 | struct usb_serial *serial; | |
1111 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1112 | int j; |
1113 | ||
0f64478c GKH |
1114 | serial = port->serial; |
1115 | ||
1116 | mos7720_port = usb_get_serial_port_data(port); | |
1117 | if (mos7720_port == NULL) | |
1118 | return; | |
1119 | ||
1120 | for (j = 0; j < NUM_URBS; ++j) | |
1121 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1122 | ||
1123 | /* Freeing Write URBs */ | |
1124 | for (j = 0; j < NUM_URBS; ++j) { | |
1125 | if (mos7720_port->write_urb_pool[j]) { | |
1126 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1127 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 | 1132 | * and interrupt read if they exists, otherwise nop */ |
a1cd7e99 | 1133 | usb_kill_urb(port->write_urb); |
a1cd7e99 ON |
1134 | usb_kill_urb(port->read_urb); |
1135 | ||
cf41aa9e JH |
1136 | write_mos_reg(serial, port->number - port->serial->minor, MCR, 0x00); |
1137 | write_mos_reg(serial, port->number - port->serial->minor, IER, 0x00); | |
1138 | ||
0f64478c | 1139 | mos7720_port->open = 0; |
0f64478c GKH |
1140 | } |
1141 | ||
95da310e | 1142 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1143 | { |
95da310e | 1144 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1145 | unsigned char data; |
0f64478c GKH |
1146 | struct usb_serial *serial; |
1147 | struct moschip_port *mos7720_port; | |
1148 | ||
0f64478c GKH |
1149 | serial = port->serial; |
1150 | ||
1151 | mos7720_port = usb_get_serial_port_data(port); | |
1152 | if (mos7720_port == NULL) | |
1153 | return; | |
1154 | ||
1155 | if (break_state == -1) | |
1156 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1157 | else | |
1158 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1159 | ||
1160 | mos7720_port->shadowLCR = data; | |
63b91767 MD |
1161 | write_mos_reg(serial, port->number - port->serial->minor, |
1162 | LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1163 | } |
1164 | ||
1165 | /* | |
1166 | * mos7720_write_room | |
1167 | * this function is called by the tty driver when it wants to know how many | |
1168 | * bytes of data we can accept for a specific port. | |
1169 | * If successful, we return the amount of room that we have for this port | |
1170 | * Otherwise we return a negative error number. | |
1171 | */ | |
95da310e | 1172 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1173 | { |
95da310e | 1174 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1175 | struct moschip_port *mos7720_port; |
1176 | int room = 0; | |
1177 | int i; | |
1178 | ||
0f64478c | 1179 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1180 | if (mos7720_port == NULL) |
0f64478c | 1181 | return -ENODEV; |
0f64478c | 1182 | |
a5b6f60c | 1183 | /* FIXME: Locking */ |
0f64478c | 1184 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1185 | if (mos7720_port->write_urb_pool[i] && |
1186 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1187 | room += URB_TRANSFER_BUFFER_SIZE; |
1188 | } | |
1189 | ||
9eecf808 | 1190 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1191 | return room; |
1192 | } | |
1193 | ||
95da310e AC |
1194 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1195 | const unsigned char *data, int count) | |
0f64478c GKH |
1196 | { |
1197 | int status; | |
1198 | int i; | |
1199 | int bytes_sent = 0; | |
1200 | int transfer_size; | |
1201 | ||
1202 | struct moschip_port *mos7720_port; | |
1203 | struct usb_serial *serial; | |
1204 | struct urb *urb; | |
1205 | const unsigned char *current_position = data; | |
1206 | ||
0f64478c GKH |
1207 | serial = port->serial; |
1208 | ||
1209 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1210 | if (mos7720_port == NULL) |
0f64478c | 1211 | return -ENODEV; |
0f64478c GKH |
1212 | |
1213 | /* try to find a free urb in the list */ | |
1214 | urb = NULL; | |
1215 | ||
1216 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1217 | if (mos7720_port->write_urb_pool[i] && |
1218 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1219 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1220 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1221 | break; |
1222 | } | |
1223 | } | |
1224 | ||
1225 | if (urb == NULL) { | |
9eecf808 | 1226 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1227 | goto exit; |
1228 | } | |
1229 | ||
1230 | if (urb->transfer_buffer == NULL) { | |
1231 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
0da16733 | 1232 | GFP_ATOMIC); |
0f64478c | 1233 | if (urb->transfer_buffer == NULL) { |
22a416c4 | 1234 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1235 | __func__); |
0f64478c GKH |
1236 | goto exit; |
1237 | } | |
1238 | } | |
4da1a17d | 1239 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1240 | |
1241 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1242 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1243 | urb->transfer_buffer); |
1244 | ||
1245 | /* fill urb with data and submit */ | |
1246 | usb_fill_bulk_urb(urb, serial->dev, | |
1247 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1248 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1249 | urb->transfer_buffer, transfer_size, |
1250 | mos7720_bulk_out_data_callback, mos7720_port); | |
1251 | ||
1252 | /* send it down the pipe */ | |
4da1a17d | 1253 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1254 | if (status) { |
22a416c4 | 1255 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1256 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1257 | bytes_sent = status; |
1258 | goto exit; | |
1259 | } | |
1260 | bytes_sent = transfer_size; | |
1261 | ||
1262 | exit: | |
1263 | return bytes_sent; | |
1264 | } | |
1265 | ||
95da310e | 1266 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1267 | { |
95da310e | 1268 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1269 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1270 | int status; |
1271 | ||
0f64478c GKH |
1272 | mos7720_port = usb_get_serial_port_data(port); |
1273 | ||
1274 | if (mos7720_port == NULL) | |
1275 | return; | |
1276 | ||
1277 | if (!mos7720_port->open) { | |
9eecf808 | 1278 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1279 | return; |
1280 | } | |
1281 | ||
0f64478c GKH |
1282 | /* if we are implementing XON/XOFF, send the stop character */ |
1283 | if (I_IXOFF(tty)) { | |
1284 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1285 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1286 | if (status <= 0) |
1287 | return; | |
1288 | } | |
1289 | ||
1290 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1291 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1292 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
63b91767 MD |
1293 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1294 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1295 | if (status != 0) |
1296 | return; | |
1297 | } | |
1298 | } | |
1299 | ||
95da310e | 1300 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1301 | { |
95da310e | 1302 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1303 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1304 | int status; |
0f64478c GKH |
1305 | |
1306 | if (mos7720_port == NULL) | |
1307 | return; | |
1308 | ||
1309 | if (!mos7720_port->open) { | |
9eecf808 | 1310 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1311 | return; |
1312 | } | |
1313 | ||
0f64478c GKH |
1314 | /* if we are implementing XON/XOFF, send the start character */ |
1315 | if (I_IXOFF(tty)) { | |
1316 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1317 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1318 | if (status <= 0) |
1319 | return; | |
1320 | } | |
1321 | ||
1322 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1323 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1324 | mos7720_port->shadowMCR |= UART_MCR_RTS; |
63b91767 MD |
1325 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1326 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1327 | if (status != 0) |
1328 | return; | |
1329 | } | |
1330 | } | |
1331 | ||
b69578df | 1332 | /* FIXME: this function does not work */ |
0f64478c GKH |
1333 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1334 | unsigned int baud) | |
1335 | { | |
0f64478c GKH |
1336 | struct usb_serial_port *port; |
1337 | struct usb_serial *serial; | |
1338 | int port_number; | |
63b91767 | 1339 | enum mos_regs sp_reg; |
0f64478c GKH |
1340 | if (mos7720_port == NULL) |
1341 | return -EINVAL; | |
1342 | ||
1343 | port = mos7720_port->port; | |
1344 | serial = port->serial; | |
1345 | ||
4da1a17d AC |
1346 | /*********************************************** |
1347 | * Init Sequence for higher rates | |
1348 | ***********************************************/ | |
9eecf808 | 1349 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
0f64478c GKH |
1350 | port_number = port->number - port->serial->minor; |
1351 | ||
63b91767 MD |
1352 | write_mos_reg(serial, port_number, IER, 0x00); |
1353 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1354 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
1355 | mos7720_port->shadowMCR = 0x0b; | |
1356 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
1357 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); | |
0f64478c | 1358 | |
4da1a17d AC |
1359 | /*********************************************** |
1360 | * Set for higher rates * | |
1361 | ***********************************************/ | |
b69578df | 1362 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 MD |
1363 | if (port_number == 0) |
1364 | sp_reg = SP1_REG; | |
1365 | else | |
1366 | sp_reg = SP2_REG; | |
1367 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); | |
1368 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); | |
1369 | mos7720_port->shadowMCR = 0x2b; | |
1370 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1371 | |
4da1a17d AC |
1372 | /*********************************************** |
1373 | * Set DLL/DLM | |
1374 | ***********************************************/ | |
63b91767 MD |
1375 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1376 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1377 | write_mos_reg(serial, port_number, DLL, 0x01); | |
1378 | write_mos_reg(serial, port_number, DLM, 0x00); | |
1379 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1380 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1381 | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | /* baud rate information */ | |
4da1a17d | 1386 | struct divisor_table_entry { |
0f64478c GKH |
1387 | __u32 baudrate; |
1388 | __u16 divisor; | |
1389 | }; | |
1390 | ||
1391 | /* Define table of divisors for moschip 7720 hardware * | |
1392 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1393 | * MCR.7 = 0. */ | |
1394 | static struct divisor_table_entry divisor_table[] = { | |
1395 | { 50, 2304}, | |
1396 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1397 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1398 | { 150, 768}, | |
1399 | { 300, 384}, | |
1400 | { 600, 192}, | |
1401 | { 1200, 96}, | |
1402 | { 1800, 64}, | |
1403 | { 2400, 48}, | |
1404 | { 4800, 24}, | |
1405 | { 7200, 16}, | |
1406 | { 9600, 12}, | |
1407 | { 19200, 6}, | |
1408 | { 38400, 3}, | |
1409 | { 57600, 2}, | |
1410 | { 115200, 1}, | |
1411 | }; | |
1412 | ||
1413 | /***************************************************************************** | |
1414 | * calc_baud_rate_divisor | |
1415 | * this function calculates the proper baud rate divisor for the specified | |
1416 | * baud rate. | |
1417 | *****************************************************************************/ | |
9eecf808 | 1418 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1419 | { |
1420 | int i; | |
1421 | __u16 custom; | |
1422 | __u16 round1; | |
1423 | __u16 round; | |
1424 | ||
1425 | ||
9eecf808 | 1426 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1427 | |
1428 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1429 | if (divisor_table[i].baudrate == baudrate) { | |
1430 | *divisor = divisor_table[i].divisor; | |
1431 | return 0; | |
1432 | } | |
1433 | } | |
1434 | ||
4da1a17d AC |
1435 | /* After trying for all the standard baud rates * |
1436 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1437 | if (baudrate > 75 && baudrate < 230400) { |
1438 | /* get the divisor */ | |
1439 | custom = (__u16)(230400L / baudrate); | |
1440 | ||
1441 | /* Check for round off */ | |
1442 | round1 = (__u16)(2304000L / baudrate); | |
1443 | round = (__u16)(round1 - (custom * 10)); | |
1444 | if (round > 4) | |
1445 | custom++; | |
1446 | *divisor = custom; | |
1447 | ||
9eecf808 | 1448 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1449 | return 0; |
1450 | } | |
1451 | ||
9eecf808 | 1452 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1453 | return -EINVAL; |
1454 | } | |
1455 | ||
1456 | /* | |
1457 | * send_cmd_write_baud_rate | |
1458 | * this function sends the proper command to change the baud rate of the | |
1459 | * specified port. | |
1460 | */ | |
1461 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1462 | int baudrate) | |
1463 | { | |
1464 | struct usb_serial_port *port; | |
1465 | struct usb_serial *serial; | |
1466 | int divisor; | |
1467 | int status; | |
0f64478c GKH |
1468 | unsigned char number; |
1469 | ||
1470 | if (mos7720_port == NULL) | |
1471 | return -1; | |
1472 | ||
1473 | port = mos7720_port->port; | |
1474 | serial = port->serial; | |
1475 | ||
0f64478c | 1476 | number = port->number - port->serial->minor; |
9eecf808 | 1477 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1478 | |
4da1a17d | 1479 | /* Calculate the Divisor */ |
9eecf808 | 1480 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1481 | if (status) { |
194343d9 | 1482 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1483 | return status; |
1484 | } | |
1485 | ||
4da1a17d | 1486 | /* Enable access to divisor latch */ |
63b91767 MD |
1487 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1488 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1489 | |
1490 | /* Write the divisor */ | |
63b91767 MD |
1491 | write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
1492 | write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1493 | |
4da1a17d | 1494 | /* Disable access to divisor latch */ |
63b91767 MD |
1495 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
1496 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1497 | |
1498 | return status; | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * change_port_settings | |
1503 | * This routine is called to set the UART on the device to match | |
1504 | * the specified new settings. | |
1505 | */ | |
95da310e AC |
1506 | static void change_port_settings(struct tty_struct *tty, |
1507 | struct moschip_port *mos7720_port, | |
606d099c | 1508 | struct ktermios *old_termios) |
0f64478c GKH |
1509 | { |
1510 | struct usb_serial_port *port; | |
1511 | struct usb_serial *serial; | |
0f64478c GKH |
1512 | int baud; |
1513 | unsigned cflag; | |
1514 | unsigned iflag; | |
1515 | __u8 mask = 0xff; | |
1516 | __u8 lData; | |
1517 | __u8 lParity; | |
1518 | __u8 lStop; | |
1519 | int status; | |
1520 | int port_number; | |
0f64478c GKH |
1521 | |
1522 | if (mos7720_port == NULL) | |
1523 | return ; | |
1524 | ||
1525 | port = mos7720_port->port; | |
1526 | serial = port->serial; | |
1527 | port_number = port->number - port->serial->minor; | |
1528 | ||
0f64478c | 1529 | if (!mos7720_port->open) { |
9eecf808 | 1530 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1531 | return; |
1532 | } | |
1533 | ||
0f64478c GKH |
1534 | lData = UART_LCR_WLEN8; |
1535 | lStop = 0x00; /* 1 stop bit */ | |
1536 | lParity = 0x00; /* No parity */ | |
1537 | ||
adc8d746 AC |
1538 | cflag = tty->termios.c_cflag; |
1539 | iflag = tty->termios.c_iflag; | |
0f64478c GKH |
1540 | |
1541 | /* Change the number of bits */ | |
1542 | switch (cflag & CSIZE) { | |
1543 | case CS5: | |
1544 | lData = UART_LCR_WLEN5; | |
1545 | mask = 0x1f; | |
1546 | break; | |
1547 | ||
1548 | case CS6: | |
1549 | lData = UART_LCR_WLEN6; | |
1550 | mask = 0x3f; | |
1551 | break; | |
1552 | ||
1553 | case CS7: | |
1554 | lData = UART_LCR_WLEN7; | |
1555 | mask = 0x7f; | |
1556 | break; | |
1557 | default: | |
1558 | case CS8: | |
1559 | lData = UART_LCR_WLEN8; | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | /* Change the Parity bit */ | |
1564 | if (cflag & PARENB) { | |
1565 | if (cflag & PARODD) { | |
1566 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1567 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1568 | } else { |
1569 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1570 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1571 | } |
1572 | ||
1573 | } else { | |
9eecf808 | 1574 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1575 | } |
1576 | ||
1577 | if (cflag & CMSPAR) | |
1578 | lParity = lParity | 0x20; | |
1579 | ||
1580 | /* Change the Stop bit */ | |
1581 | if (cflag & CSTOPB) { | |
1582 | lStop = UART_LCR_STOP; | |
9eecf808 | 1583 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1584 | } else { |
1585 | lStop = 0x00; | |
9eecf808 | 1586 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1587 | } |
1588 | ||
1589 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1590 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1591 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1592 | ||
1593 | /* Update the LCR with the correct value */ | |
4da1a17d | 1594 | mos7720_port->shadowLCR &= |
63b91767 | 1595 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1596 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1597 | ||
1598 | ||
1599 | /* Disable Interrupts */ | |
63b91767 MD |
1600 | write_mos_reg(serial, port_number, IER, 0x00); |
1601 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1602 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
0f64478c GKH |
1603 | |
1604 | /* Send the updated LCR value to the mos7720 */ | |
63b91767 MD |
1605 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
1606 | mos7720_port->shadowMCR = 0x0b; | |
1607 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1608 | |
1609 | /* set up the MCR register and send it to the mos7720 */ | |
1610 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1611 | if (cflag & CBAUD) | |
1612 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1613 | ||
1614 | if (cflag & CRTSCTS) { | |
1615 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1616 | /* To set hardware flow control to the specified * |
1617 | * serial port, in SP1/2_CONTROL_REG */ | |
a26f009a | 1618 | if (port_number) |
63b91767 MD |
1619 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); |
1620 | else | |
1621 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); | |
1622 | ||
1623 | } else | |
0f64478c | 1624 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1625 | |
63b91767 | 1626 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
0f64478c GKH |
1627 | |
1628 | /* Determine divisor based on baud rate */ | |
1629 | baud = tty_get_baud_rate(tty); | |
1630 | if (!baud) { | |
1631 | /* pick a default, any default... */ | |
9eecf808 | 1632 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1633 | baud = 9600; |
1634 | } | |
1635 | ||
1636 | if (baud >= 230400) { | |
1637 | set_higher_rates(mos7720_port, baud); | |
1638 | /* Enable Interrupts */ | |
63b91767 | 1639 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1640 | return; |
1641 | } | |
1642 | ||
9eecf808 | 1643 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1644 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1645 | /* FIXME: needs to write actual resulting baud back not just |
1646 | blindly do so */ | |
1647 | if (cflag & CBAUD) | |
1648 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1649 | /* Enable Interrupts */ |
63b91767 | 1650 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1651 | |
1652 | if (port->read_urb->status != -EINPROGRESS) { | |
0f64478c GKH |
1653 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1654 | if (status) | |
9eecf808 | 1655 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1656 | } |
0f64478c GKH |
1657 | } |
1658 | ||
1659 | /* | |
1660 | * mos7720_set_termios | |
1661 | * this function is called by the tty driver when it wants to change the | |
1662 | * termios structure. | |
1663 | */ | |
95da310e AC |
1664 | static void mos7720_set_termios(struct tty_struct *tty, |
1665 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1666 | { |
1667 | int status; | |
1668 | unsigned int cflag; | |
1669 | struct usb_serial *serial; | |
1670 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1671 | |
1672 | serial = port->serial; | |
1673 | ||
1674 | mos7720_port = usb_get_serial_port_data(port); | |
1675 | ||
1676 | if (mos7720_port == NULL) | |
1677 | return; | |
1678 | ||
0f64478c | 1679 | if (!mos7720_port->open) { |
9eecf808 | 1680 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1681 | return; |
1682 | } | |
1683 | ||
9eecf808 | 1684 | dev_dbg(&port->dev, "setting termios - ASPIRE\n"); |
0f64478c | 1685 | |
adc8d746 | 1686 | cflag = tty->termios.c_cflag; |
0f64478c | 1687 | |
9eecf808 | 1688 | dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__, |
d9a80746 | 1689 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
0f64478c | 1690 | |
9eecf808 GKH |
1691 | dev_dbg(&port->dev, "%s - old cflag %08x old iflag %08x\n", __func__, |
1692 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1693 | |
1694 | /* change the port settings to the new ones specified */ | |
95da310e | 1695 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1696 | |
4da1a17d | 1697 | if (port->read_urb->status != -EINPROGRESS) { |
0f64478c GKH |
1698 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1699 | if (status) | |
9eecf808 | 1700 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1701 | } |
0f64478c GKH |
1702 | } |
1703 | ||
1704 | /* | |
1705 | * get_lsr_info - get line status register info | |
1706 | * | |
1707 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1708 | * is emptied. On bus types like RS485, the transmitter must | |
1709 | * release the bus after transmitting. This must be done when | |
1710 | * the transmit shift register is empty, not be done when the | |
1711 | * transmit holding register is empty. This functionality | |
1712 | * allows an RS485 driver to be written in user space. | |
1713 | */ | |
4da1a17d AC |
1714 | static int get_lsr_info(struct tty_struct *tty, |
1715 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1716 | { |
2f9ea55c | 1717 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1718 | unsigned int result = 0; |
2f9ea55c KS |
1719 | unsigned char data = 0; |
1720 | int port_number = port->number - port->serial->minor; | |
1721 | int count; | |
0f64478c | 1722 | |
95da310e | 1723 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1724 | if (count == 0) { |
63b91767 | 1725 | read_mos_reg(port->serial, port_number, LSR, &data); |
2f9ea55c KS |
1726 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1727 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1728 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1729 | result = TIOCSER_TEMT; |
1730 | } | |
0f64478c | 1731 | } |
0f64478c GKH |
1732 | if (copy_to_user(value, &result, sizeof(int))) |
1733 | return -EFAULT; | |
1734 | return 0; | |
1735 | } | |
1736 | ||
60b33c13 | 1737 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1738 | { |
1739 | struct usb_serial_port *port = tty->driver_data; | |
1740 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1741 | unsigned int result = 0; | |
1742 | unsigned int mcr ; | |
1743 | unsigned int msr ; | |
1744 | ||
0f608f89 KS |
1745 | mcr = mos7720_port->shadowMCR; |
1746 | msr = mos7720_port->shadowMSR; | |
1747 | ||
1748 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1749 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1750 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1751 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1752 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1753 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1754 | ||
0f608f89 KS |
1755 | return result; |
1756 | } | |
1757 | ||
20b9d177 | 1758 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1759 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1760 | { |
1761 | struct usb_serial_port *port = tty->driver_data; | |
1762 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1763 | unsigned int mcr ; | |
0f608f89 KS |
1764 | |
1765 | mcr = mos7720_port->shadowMCR; | |
1766 | ||
1767 | if (set & TIOCM_RTS) | |
1768 | mcr |= UART_MCR_RTS; | |
1769 | if (set & TIOCM_DTR) | |
1770 | mcr |= UART_MCR_DTR; | |
1771 | if (set & TIOCM_LOOP) | |
1772 | mcr |= UART_MCR_LOOP; | |
1773 | ||
1774 | if (clear & TIOCM_RTS) | |
1775 | mcr &= ~UART_MCR_RTS; | |
1776 | if (clear & TIOCM_DTR) | |
1777 | mcr &= ~UART_MCR_DTR; | |
1778 | if (clear & TIOCM_LOOP) | |
1779 | mcr &= ~UART_MCR_LOOP; | |
1780 | ||
1781 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1782 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1783 | MCR, mos7720_port->shadowMCR); | |
0f608f89 KS |
1784 | |
1785 | return 0; | |
1786 | } | |
1787 | ||
0f64478c GKH |
1788 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1789 | unsigned int __user *value) | |
1790 | { | |
0bca1b91 | 1791 | unsigned int mcr; |
0f64478c | 1792 | unsigned int arg; |
0f64478c GKH |
1793 | |
1794 | struct usb_serial_port *port; | |
1795 | ||
1796 | if (mos7720_port == NULL) | |
1797 | return -1; | |
1798 | ||
4da1a17d | 1799 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1800 | mcr = mos7720_port->shadowMCR; |
1801 | ||
1802 | if (copy_from_user(&arg, value, sizeof(int))) | |
1803 | return -EFAULT; | |
1804 | ||
1805 | switch (cmd) { | |
1806 | case TIOCMBIS: | |
1807 | if (arg & TIOCM_RTS) | |
1808 | mcr |= UART_MCR_RTS; | |
1809 | if (arg & TIOCM_DTR) | |
1810 | mcr |= UART_MCR_RTS; | |
1811 | if (arg & TIOCM_LOOP) | |
1812 | mcr |= UART_MCR_LOOP; | |
1813 | break; | |
1814 | ||
1815 | case TIOCMBIC: | |
1816 | if (arg & TIOCM_RTS) | |
1817 | mcr &= ~UART_MCR_RTS; | |
1818 | if (arg & TIOCM_DTR) | |
1819 | mcr &= ~UART_MCR_RTS; | |
1820 | if (arg & TIOCM_LOOP) | |
1821 | mcr &= ~UART_MCR_LOOP; | |
1822 | break; | |
1823 | ||
0f64478c GKH |
1824 | } |
1825 | ||
1826 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1827 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1828 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1829 | |
1830 | return 0; | |
1831 | } | |
1832 | ||
0f64478c GKH |
1833 | static int get_serial_info(struct moschip_port *mos7720_port, |
1834 | struct serial_struct __user *retinfo) | |
1835 | { | |
1836 | struct serial_struct tmp; | |
1837 | ||
1838 | if (!retinfo) | |
1839 | return -EFAULT; | |
1840 | ||
1841 | memset(&tmp, 0, sizeof(tmp)); | |
1842 | ||
1843 | tmp.type = PORT_16550A; | |
1844 | tmp.line = mos7720_port->port->serial->minor; | |
1845 | tmp.port = mos7720_port->port->number; | |
1846 | tmp.irq = 0; | |
1847 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1848 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1849 | tmp.baud_base = 9600; |
1850 | tmp.close_delay = 5*HZ; | |
1851 | tmp.closing_wait = 30*HZ; | |
1852 | ||
1853 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1854 | return -EFAULT; | |
1855 | return 0; | |
1856 | } | |
1857 | ||
00a0d0d6 | 1858 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1859 | unsigned int cmd, unsigned long arg) |
1860 | { | |
95da310e | 1861 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1862 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1863 | |
1864 | mos7720_port = usb_get_serial_port_data(port); | |
1865 | if (mos7720_port == NULL) | |
1866 | return -ENODEV; | |
1867 | ||
9eecf808 | 1868 | dev_dbg(&port->dev, "%s - cmd = 0x%x", __func__, cmd); |
0f64478c GKH |
1869 | |
1870 | switch (cmd) { | |
0f64478c | 1871 | case TIOCSERGETLSR: |
9eecf808 | 1872 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1873 | return get_lsr_info(tty, mos7720_port, |
1874 | (unsigned int __user *)arg); | |
0f64478c | 1875 | |
95da310e | 1876 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1877 | case TIOCMBIS: |
1878 | case TIOCMBIC: | |
9eecf808 | 1879 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1880 | return set_modem_info(mos7720_port, cmd, |
1881 | (unsigned int __user *)arg); | |
1882 | ||
0f64478c | 1883 | case TIOCGSERIAL: |
9eecf808 | 1884 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1885 | return get_serial_info(mos7720_port, |
1886 | (struct serial_struct __user *)arg); | |
0f64478c GKH |
1887 | } |
1888 | ||
1889 | return -ENOIOCTLCMD; | |
1890 | } | |
1891 | ||
1892 | static int mos7720_startup(struct usb_serial *serial) | |
1893 | { | |
0f64478c | 1894 | struct usb_device *dev; |
0f64478c | 1895 | char data; |
91f58ae6 | 1896 | u16 product; |
b69578df | 1897 | int ret_val; |
0f64478c | 1898 | |
5a896b11 JH |
1899 | if (serial->num_bulk_in < 2 || serial->num_bulk_out < 2) { |
1900 | dev_err(&serial->interface->dev, "missing bulk endpoints\n"); | |
1901 | return -ENODEV; | |
1902 | } | |
1903 | ||
91f58ae6 | 1904 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
1905 | dev = serial->dev; |
1906 | ||
fb088e33 MD |
1907 | /* |
1908 | * The 7715 uses the first bulk in/out endpoint pair for the parallel | |
1909 | * port, and the second for the serial port. Because the usbserial core | |
1910 | * assumes both pairs are serial ports, we must engage in a bit of | |
1911 | * subterfuge and swap the pointers for ports 0 and 1 in order to make | |
1912 | * port 0 point to the serial port. However, both moschip devices use a | |
1913 | * single interrupt-in endpoint for both ports (as mentioned a little | |
1914 | * further down), and this endpoint was assigned to port 0. So after | |
1915 | * the swap, we must copy the interrupt endpoint elements from port 1 | |
1916 | * (as newly assigned) to port 0, and null out port 1 pointers. | |
1917 | */ | |
1918 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1919 | struct usb_serial_port *tmp = serial->port[0]; | |
1920 | serial->port[0] = serial->port[1]; | |
1921 | serial->port[1] = tmp; | |
1922 | serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; | |
1923 | serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; | |
1924 | serial->port[0]->interrupt_in_endpointAddress = | |
1925 | tmp->interrupt_in_endpointAddress; | |
1926 | serial->port[1]->interrupt_in_urb = NULL; | |
1927 | serial->port[1]->interrupt_in_buffer = NULL; | |
56a4835e JH |
1928 | |
1929 | if (serial->port[0]->interrupt_in_urb) { | |
1930 | struct urb *urb = serial->port[0]->interrupt_in_urb; | |
1931 | ||
1932 | urb->complete = mos7715_interrupt_callback; | |
1933 | } | |
fb088e33 MD |
1934 | } |
1935 | ||
0f64478c GKH |
1936 | /* setting configuration feature to one */ |
1937 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
849513a7 | 1938 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
0f64478c | 1939 | |
b69578df MD |
1940 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1941 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1942 | ret_val = mos7715_parport_init(serial); | |
756f54d8 | 1943 | if (ret_val < 0) |
b69578df MD |
1944 | return ret_val; |
1945 | } | |
1946 | #endif | |
756f54d8 JH |
1947 | /* start the interrupt urb */ |
1948 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
1949 | if (ret_val) { | |
1950 | dev_err(&dev->dev, "failed to submit interrupt urb: %d\n", | |
1951 | ret_val); | |
1952 | } | |
1953 | ||
4da1a17d | 1954 | /* LSR For Port 1 */ |
63b91767 | 1955 | read_mos_reg(serial, 0, LSR, &data); |
9eecf808 | 1956 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
1957 | |
1958 | return 0; | |
1959 | } | |
1960 | ||
f9c99bb8 | 1961 | static void mos7720_release(struct usb_serial *serial) |
0f64478c | 1962 | { |
54cd03af JH |
1963 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
1964 | ||
b69578df MD |
1965 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1966 | /* close the parallel port */ | |
1967 | ||
1968 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
1969 | == MOSCHIP_DEVICE_ID_7715) { | |
1970 | struct urbtracker *urbtrack; | |
1971 | unsigned long flags; | |
1972 | struct mos7715_parport *mos_parport = | |
1973 | usb_get_serial_data(serial); | |
1974 | ||
1975 | /* prevent NULL ptr dereference in port callbacks */ | |
1976 | spin_lock(&release_lock); | |
1977 | mos_parport->pp->private_data = NULL; | |
1978 | spin_unlock(&release_lock); | |
1979 | ||
1980 | /* wait for synchronous usb calls to return */ | |
1981 | if (mos_parport->msg_pending) | |
1982 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
849513a7 | 1983 | msecs_to_jiffies(MOS_WDR_TIMEOUT)); |
b69578df MD |
1984 | |
1985 | parport_remove_port(mos_parport->pp); | |
1986 | usb_set_serial_data(serial, NULL); | |
1987 | mos_parport->serial = NULL; | |
1988 | ||
1989 | /* if tasklet currently scheduled, wait for it to complete */ | |
1990 | tasklet_kill(&mos_parport->urb_tasklet); | |
1991 | ||
1992 | /* unlink any urbs sent by the tasklet */ | |
1993 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
1994 | list_for_each_entry(urbtrack, | |
1995 | &mos_parport->active_urbs, | |
1996 | urblist_entry) | |
1997 | usb_unlink_urb(urbtrack->urb); | |
1998 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
1999 | ||
2000 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
2001 | } | |
2002 | #endif | |
4230af57 JH |
2003 | } |
2004 | ||
2005 | static int mos7720_port_probe(struct usb_serial_port *port) | |
2006 | { | |
2007 | struct moschip_port *mos7720_port; | |
2008 | ||
2009 | mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); | |
2010 | if (!mos7720_port) | |
2011 | return -ENOMEM; | |
2012 | ||
2013 | /* Initialize all port interrupt end point to port 0 int endpoint. | |
2014 | * Our device has only one interrupt endpoint common to all ports. | |
2015 | */ | |
2016 | port->interrupt_in_endpointAddress = | |
2017 | port->serial->port[0]->interrupt_in_endpointAddress; | |
2018 | mos7720_port->port = port; | |
2019 | ||
2020 | usb_set_serial_port_data(port, mos7720_port); | |
2021 | ||
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | static int mos7720_port_remove(struct usb_serial_port *port) | |
2026 | { | |
2027 | struct moschip_port *mos7720_port; | |
2028 | ||
2029 | mos7720_port = usb_get_serial_port_data(port); | |
2030 | kfree(mos7720_port); | |
2031 | ||
2032 | return 0; | |
0f64478c GKH |
2033 | } |
2034 | ||
2035 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2036 | .driver = { | |
2037 | .owner = THIS_MODULE, | |
2038 | .name = "moschip7720", | |
2039 | }, | |
2040 | .description = "Moschip 2 port adapter", | |
68e24113 | 2041 | .id_table = id_table, |
fb088e33 | 2042 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2043 | .open = mos7720_open, |
2044 | .close = mos7720_close, | |
2045 | .throttle = mos7720_throttle, | |
2046 | .unthrottle = mos7720_unthrottle, | |
2047 | .attach = mos7720_startup, | |
f9c99bb8 | 2048 | .release = mos7720_release, |
4230af57 JH |
2049 | .port_probe = mos7720_port_probe, |
2050 | .port_remove = mos7720_port_remove, | |
0f64478c | 2051 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2052 | .tiocmget = mos7720_tiocmget, |
2053 | .tiocmset = mos7720_tiocmset, | |
0f64478c GKH |
2054 | .set_termios = mos7720_set_termios, |
2055 | .write = mos7720_write, | |
2056 | .write_room = mos7720_write_room, | |
2057 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2058 | .break_ctl = mos7720_break, | |
2059 | .read_bulk_callback = mos7720_bulk_in_callback, | |
56a4835e | 2060 | .read_int_callback = mos7720_interrupt_callback, |
0f64478c GKH |
2061 | }; |
2062 | ||
4d2a7aff AS |
2063 | static struct usb_serial_driver * const serial_drivers[] = { |
2064 | &moschip7720_2port_driver, NULL | |
2065 | }; | |
2066 | ||
68e24113 | 2067 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2068 | |
4da1a17d AC |
2069 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2070 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c | 2071 | MODULE_LICENSE("GPL"); |