Commit | Line | Data |
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0f64478c GKH |
1 | /* |
2 | * mos7720.c | |
3 | * Controls the Moschip 7720 usb to dual port serial convertor | |
4 | * | |
5 | * Copyright 2006 Moschip Semiconductor Tech. Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2 of the License. | |
10 | * | |
11 | * Developed by: | |
50d2dc72 GKH |
12 | * Vijaya Kumar <vijaykumar.gn@gmail.com> |
13 | * Ajay Kumar <naanuajay@yahoo.com> | |
14 | * Gurudeva <ngurudeva@yahoo.com> | |
0f64478c GKH |
15 | * |
16 | * Cleaned up from the original by: | |
17 | * Greg Kroah-Hartman <gregkh@suse.de> | |
18 | * | |
19 | * Originally based on drivers/usb/serial/io_edgeport.c which is: | |
20 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. | |
21 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
22 | */ | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/serial.h> | |
33 | #include <linux/serial_reg.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
4da1a17d | 36 | #include <linux/uaccess.h> |
b69578df | 37 | #include <linux/parport.h> |
0f64478c GKH |
38 | |
39 | /* | |
40 | * Version Information | |
41 | */ | |
63b91767 | 42 | #define DRIVER_VERSION "2.1" |
0f64478c GKH |
43 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
44 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
45 | ||
46 | /* default urb timeout */ | |
47 | #define MOS_WDR_TIMEOUT (HZ * 5) | |
48 | ||
0f64478c GKH |
49 | #define MOS_MAX_PORT 0x02 |
50 | #define MOS_WRITE 0x0E | |
51 | #define MOS_READ 0x0D | |
52 | ||
53 | /* Interrupt Rotinue Defines */ | |
54 | #define SERIAL_IIR_RLS 0x06 | |
55 | #define SERIAL_IIR_RDA 0x04 | |
56 | #define SERIAL_IIR_CTI 0x0c | |
57 | #define SERIAL_IIR_THR 0x02 | |
58 | #define SERIAL_IIR_MS 0x00 | |
59 | ||
60 | #define NUM_URBS 16 /* URB Count */ | |
61 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
62 | ||
b69578df | 63 | /* This structure holds all of the local serial port information */ |
4da1a17d | 64 | struct moschip_port { |
0f64478c GKH |
65 | __u8 shadowLCR; /* last LCR value received */ |
66 | __u8 shadowMCR; /* last MCR value received */ | |
67 | __u8 shadowMSR; /* last MSR value received */ | |
68 | char open; | |
69 | struct async_icount icount; | |
70 | struct usb_serial_port *port; /* loop back to the owner */ | |
71 | struct urb *write_urb_pool[NUM_URBS]; | |
72 | }; | |
73 | ||
90ab5ee9 | 74 | static bool debug; |
0f64478c | 75 | |
fb088e33 MD |
76 | static struct usb_serial_driver moschip7720_2port_driver; |
77 | ||
0f64478c GKH |
78 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
79 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
80 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
81 | ||
68e24113 | 82 | static const struct usb_device_id id_table[] = { |
4da1a17d | 83 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 84 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
85 | { } /* terminating entry */ |
86 | }; | |
68e24113 | 87 | MODULE_DEVICE_TABLE(usb, id_table); |
0f64478c | 88 | |
b69578df MD |
89 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
90 | ||
91 | /* initial values for parport regs */ | |
92 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
93 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
94 | ||
95 | struct urbtracker { | |
96 | struct mos7715_parport *mos_parport; | |
97 | struct list_head urblist_entry; | |
98 | struct kref ref_count; | |
99 | struct urb *urb; | |
100 | }; | |
101 | ||
102 | enum mos7715_pp_modes { | |
103 | SPP = 0<<5, | |
104 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
105 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
106 | }; | |
107 | ||
108 | struct mos7715_parport { | |
109 | struct parport *pp; /* back to containing struct */ | |
110 | struct kref ref_count; /* to instance of this struct */ | |
111 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
112 | struct list_head active_urbs; /* list async urbs in flight */ | |
113 | spinlock_t listlock; /* protects list access */ | |
114 | bool msg_pending; /* usb sync call pending */ | |
115 | struct completion syncmsg_compl; /* usb sync call completed */ | |
116 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
117 | struct usb_serial *serial; /* back to containing struct */ | |
118 | __u8 shadowECR; /* parallel port regs... */ | |
119 | __u8 shadowDCR; | |
120 | atomic_t shadowDSR; /* updated in int-in callback */ | |
121 | }; | |
122 | ||
123 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
124 | static DEFINE_SPINLOCK(release_lock); | |
125 | ||
63b91767 MD |
126 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
127 | ||
128 | static const unsigned int dummy; /* for clarity in register access fns */ | |
129 | ||
b69578df MD |
130 | enum mos_regs { |
131 | THR, /* serial port regs */ | |
132 | RHR, | |
133 | IER, | |
134 | FCR, | |
135 | ISR, | |
136 | LCR, | |
137 | MCR, | |
138 | LSR, | |
139 | MSR, | |
140 | SPR, | |
141 | DLL, | |
142 | DLM, | |
143 | DPR, /* parallel port regs */ | |
144 | DSR, | |
145 | DCR, | |
146 | ECR, | |
147 | SP1_REG, /* device control regs */ | |
148 | SP2_REG, /* serial port 2 (7720 only) */ | |
149 | PP_REG, | |
150 | SP_CONTROL_REG, | |
151 | }; | |
152 | ||
153 | /* | |
154 | * Return the correct value for the Windex field of the setup packet | |
155 | * for a control endpoint message. See the 7715 datasheet. | |
156 | */ | |
157 | static inline __u16 get_reg_index(enum mos_regs reg) | |
158 | { | |
159 | static const __u16 mos7715_index_lookup_table[] = { | |
160 | 0x00, /* THR */ | |
161 | 0x00, /* RHR */ | |
162 | 0x01, /* IER */ | |
163 | 0x02, /* FCR */ | |
164 | 0x02, /* ISR */ | |
165 | 0x03, /* LCR */ | |
166 | 0x04, /* MCR */ | |
167 | 0x05, /* LSR */ | |
168 | 0x06, /* MSR */ | |
169 | 0x07, /* SPR */ | |
170 | 0x00, /* DLL */ | |
171 | 0x01, /* DLM */ | |
172 | 0x00, /* DPR */ | |
173 | 0x01, /* DSR */ | |
174 | 0x02, /* DCR */ | |
175 | 0x0a, /* ECR */ | |
176 | 0x01, /* SP1_REG */ | |
177 | 0x02, /* SP2_REG (7720 only) */ | |
178 | 0x04, /* PP_REG (7715 only) */ | |
179 | 0x08, /* SP_CONTROL_REG */ | |
180 | }; | |
181 | return mos7715_index_lookup_table[reg]; | |
182 | } | |
183 | ||
184 | /* | |
185 | * Return the correct value for the upper byte of the Wvalue field of | |
186 | * the setup packet for a control endpoint message. | |
187 | */ | |
63b91767 MD |
188 | static inline __u16 get_reg_value(enum mos_regs reg, |
189 | unsigned int serial_portnum) | |
b69578df MD |
190 | { |
191 | if (reg >= SP1_REG) /* control reg */ | |
192 | return 0x0000; | |
63b91767 MD |
193 | |
194 | else if (reg >= DPR) /* parallel port reg (7715 only) */ | |
b69578df | 195 | return 0x0100; |
63b91767 MD |
196 | |
197 | else /* serial port reg */ | |
198 | return (serial_portnum + 2) << 8; | |
b69578df MD |
199 | } |
200 | ||
201 | /* | |
202 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
203 | * the value field of the setup packet. serial_portnum is ignored for registers |
204 | * not specific to a particular serial port. | |
b69578df | 205 | */ |
63b91767 MD |
206 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
207 | enum mos_regs reg, __u8 data) | |
b69578df | 208 | { |
b69578df MD |
209 | struct usb_device *usbdev = serial->dev; |
210 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
211 | __u8 request = (__u8)0x0e; | |
212 | __u8 requesttype = (__u8)0x40; | |
b69578df | 213 | __u16 index = get_reg_index(reg); |
63b91767 MD |
214 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
215 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
216 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
217 | if (status < 0) |
218 | dev_err(&usbdev->dev, | |
219 | "mos7720: usb_control_msg() failed: %d", status); | |
220 | return status; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
225 | * device is embedded in the value field of the setup packet. serial_portnum is |
226 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 227 | */ |
63b91767 MD |
228 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
229 | enum mos_regs reg, __u8 *data) | |
b69578df | 230 | { |
63b91767 | 231 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
232 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
233 | __u8 request = (__u8)0x0d; | |
234 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 235 | __u16 index = get_reg_index(reg); |
63b91767 | 236 | __u16 value = get_reg_value(reg, serial_portnum); |
b69578df | 237 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, |
63b91767 | 238 | index, data, 1, MOS_WDR_TIMEOUT); |
b69578df MD |
239 | if (status < 0) |
240 | dev_err(&usbdev->dev, | |
241 | "mos7720: usb_control_msg() failed: %d", status); | |
242 | return status; | |
243 | } | |
244 | ||
63b91767 MD |
245 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
246 | ||
b69578df MD |
247 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
248 | enum mos7715_pp_modes mode) | |
249 | { | |
250 | mos_parport->shadowECR = mode; | |
63b91767 | 251 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
252 | return 0; |
253 | } | |
254 | ||
255 | static void destroy_mos_parport(struct kref *kref) | |
256 | { | |
257 | struct mos7715_parport *mos_parport = | |
258 | container_of(kref, struct mos7715_parport, ref_count); | |
259 | ||
b69578df MD |
260 | kfree(mos_parport); |
261 | } | |
262 | ||
263 | static void destroy_urbtracker(struct kref *kref) | |
264 | { | |
265 | struct urbtracker *urbtrack = | |
266 | container_of(kref, struct urbtracker, ref_count); | |
267 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 268 | |
b69578df MD |
269 | usb_free_urb(urbtrack->urb); |
270 | kfree(urbtrack); | |
271 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
272 | } | |
273 | ||
274 | /* | |
275 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
276 | * port callback had to be deferred because the disconnect mutex could not be | |
277 | * obtained at the time. | |
278 | */ | |
279 | static void send_deferred_urbs(unsigned long _mos_parport) | |
280 | { | |
281 | int ret_val; | |
282 | unsigned long flags; | |
283 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 284 | struct urbtracker *urbtrack, *tmp; |
b69578df | 285 | struct list_head *cursor, *next; |
9eecf808 | 286 | struct device *dev; |
b69578df | 287 | |
b69578df MD |
288 | /* if release function ran, game over */ |
289 | if (unlikely(mos_parport->serial == NULL)) | |
290 | return; | |
291 | ||
9eecf808 GKH |
292 | dev = &mos_parport->serial->dev->dev; |
293 | ||
b69578df MD |
294 | /* try again to get the mutex */ |
295 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 296 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
297 | tasklet_schedule(&mos_parport->urb_tasklet); |
298 | return; | |
299 | } | |
300 | ||
301 | /* if device disconnected, game over */ | |
302 | if (unlikely(mos_parport->serial->disconnected)) { | |
303 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
304 | return; | |
305 | } | |
306 | ||
307 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
308 | if (list_empty(&mos_parport->deferred_urbs)) { | |
309 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
310 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 311 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
312 | return; |
313 | } | |
314 | ||
315 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
316 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
317 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 318 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
319 | urblist_entry) { |
320 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 321 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 322 | if (ret_val) { |
9eecf808 | 323 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
324 | list_del(&urbtrack->urblist_entry); |
325 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
326 | } | |
327 | } | |
328 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
329 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
330 | } | |
331 | ||
332 | /* callback for parallel port control urbs submitted asynchronously */ | |
333 | static void async_complete(struct urb *urb) | |
334 | { | |
335 | struct urbtracker *urbtrack = urb->context; | |
336 | int status = urb->status; | |
ca09907d | 337 | |
b69578df | 338 | if (unlikely(status)) |
9eecf808 | 339 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
340 | |
341 | /* remove the urbtracker from the active_urbs list */ | |
342 | spin_lock(&urbtrack->mos_parport->listlock); | |
343 | list_del(&urbtrack->urblist_entry); | |
344 | spin_unlock(&urbtrack->mos_parport->listlock); | |
345 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
346 | } | |
347 | ||
348 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
349 | enum mos_regs reg, __u8 data) | |
350 | { | |
351 | struct urbtracker *urbtrack; | |
352 | int ret_val; | |
353 | unsigned long flags; | |
354 | struct usb_ctrlrequest setup; | |
355 | struct usb_serial *serial = mos_parport->serial; | |
356 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
357 | |
358 | /* create and initialize the control urb and containing urbtracker */ | |
359 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
360 | if (urbtrack == NULL) { | |
361 | dev_err(&usbdev->dev, "out of memory"); | |
362 | return -ENOMEM; | |
363 | } | |
364 | kref_get(&mos_parport->ref_count); | |
365 | urbtrack->mos_parport = mos_parport; | |
366 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
367 | if (urbtrack->urb == NULL) { | |
368 | dev_err(&usbdev->dev, "out of urbs"); | |
369 | kfree(urbtrack); | |
370 | return -ENOMEM; | |
371 | } | |
372 | setup.bRequestType = (__u8)0x40; | |
373 | setup.bRequest = (__u8)0x0e; | |
63b91767 | 374 | setup.wValue = get_reg_value(reg, dummy); |
b69578df MD |
375 | setup.wIndex = get_reg_index(reg); |
376 | setup.wLength = 0; | |
377 | usb_fill_control_urb(urbtrack->urb, usbdev, | |
378 | usb_sndctrlpipe(usbdev, 0), | |
379 | (unsigned char *)&setup, | |
380 | NULL, 0, async_complete, urbtrack); | |
381 | kref_init(&urbtrack->ref_count); | |
382 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
383 | ||
384 | /* | |
385 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
386 | * and schedule a tasklet to try again later | |
387 | */ | |
388 | if (!mutex_trylock(&serial->disc_mutex)) { | |
389 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
390 | list_add_tail(&urbtrack->urblist_entry, | |
391 | &mos_parport->deferred_urbs); | |
392 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
393 | tasklet_schedule(&mos_parport->urb_tasklet); | |
9eecf808 | 394 | dev_dbg(&usbdev->dev, "tasklet scheduled"); |
b69578df MD |
395 | return 0; |
396 | } | |
397 | ||
398 | /* bail if device disconnected */ | |
399 | if (serial->disconnected) { | |
400 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
401 | mutex_unlock(&serial->disc_mutex); | |
402 | return -ENODEV; | |
403 | } | |
404 | ||
405 | /* add the tracker to the active_urbs list and submit */ | |
406 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
407 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
408 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
409 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
410 | mutex_unlock(&serial->disc_mutex); | |
411 | if (ret_val) { | |
412 | dev_err(&usbdev->dev, | |
413 | "%s: submit_urb() failed: %d", __func__, ret_val); | |
414 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
415 | list_del(&urbtrack->urblist_entry); | |
416 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
417 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
418 | return ret_val; | |
419 | } | |
420 | return 0; | |
421 | } | |
422 | ||
423 | /* | |
424 | * This is the the common top part of all parallel port callback operations that | |
425 | * send synchronous messages to the device. This implements convoluted locking | |
426 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
427 | * has called our release function, at which point struct mos7715_parport has | |
428 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
429 | * not called the release function yet because someone has a serial port open. | |
430 | * The shared release_lock prevents the first, and the mutex and disconnected | |
431 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
432 | * flag to ensure that all synchronous usb messgage calls have completed before | |
433 | * our release function can return. | |
434 | */ | |
435 | static int parport_prologue(struct parport *pp) | |
436 | { | |
437 | struct mos7715_parport *mos_parport; | |
438 | ||
439 | spin_lock(&release_lock); | |
440 | mos_parport = pp->private_data; | |
441 | if (unlikely(mos_parport == NULL)) { | |
442 | /* release fn called, port struct destroyed */ | |
443 | spin_unlock(&release_lock); | |
444 | return -1; | |
445 | } | |
446 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
447 | INIT_COMPLETION(mos_parport->syncmsg_compl); | |
448 | spin_unlock(&release_lock); | |
449 | ||
450 | mutex_lock(&mos_parport->serial->disc_mutex); | |
451 | if (mos_parport->serial->disconnected) { | |
452 | /* device disconnected */ | |
453 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
454 | mos_parport->msg_pending = false; | |
455 | complete(&mos_parport->syncmsg_compl); | |
456 | return -1; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | /* | |
463 | * This is the the common bottom part of all parallel port functions that send | |
464 | * synchronous messages to the device. | |
465 | */ | |
466 | static inline void parport_epilogue(struct parport *pp) | |
467 | { | |
468 | struct mos7715_parport *mos_parport = pp->private_data; | |
469 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
470 | mos_parport->msg_pending = false; | |
471 | complete(&mos_parport->syncmsg_compl); | |
472 | } | |
473 | ||
474 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
475 | { | |
476 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 477 | |
b69578df MD |
478 | if (parport_prologue(pp) < 0) |
479 | return; | |
480 | mos7715_change_mode(mos_parport, SPP); | |
63b91767 | 481 | write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d); |
b69578df MD |
482 | parport_epilogue(pp); |
483 | } | |
484 | ||
485 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
486 | { | |
487 | struct mos7715_parport *mos_parport = pp->private_data; | |
488 | unsigned char d; | |
ca09907d | 489 | |
b69578df MD |
490 | if (parport_prologue(pp) < 0) |
491 | return 0; | |
63b91767 | 492 | read_mos_reg(mos_parport->serial, dummy, DPR, &d); |
b69578df MD |
493 | parport_epilogue(pp); |
494 | return d; | |
495 | } | |
496 | ||
497 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
498 | { | |
499 | struct mos7715_parport *mos_parport = pp->private_data; | |
500 | __u8 data; | |
ca09907d | 501 | |
b69578df MD |
502 | if (parport_prologue(pp) < 0) |
503 | return; | |
504 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
63b91767 | 505 | write_mos_reg(mos_parport->serial, dummy, DCR, data); |
b69578df MD |
506 | mos_parport->shadowDCR = data; |
507 | parport_epilogue(pp); | |
508 | } | |
509 | ||
510 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
511 | { | |
512 | struct mos7715_parport *mos_parport = pp->private_data; | |
513 | __u8 dcr; | |
ca09907d | 514 | |
b69578df MD |
515 | spin_lock(&release_lock); |
516 | mos_parport = pp->private_data; | |
517 | if (unlikely(mos_parport == NULL)) { | |
518 | spin_unlock(&release_lock); | |
519 | return 0; | |
520 | } | |
521 | dcr = mos_parport->shadowDCR & 0x0f; | |
522 | spin_unlock(&release_lock); | |
523 | return dcr; | |
524 | } | |
525 | ||
526 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
527 | unsigned char mask, | |
528 | unsigned char val) | |
529 | { | |
530 | struct mos7715_parport *mos_parport = pp->private_data; | |
531 | __u8 dcr; | |
ca09907d | 532 | |
b69578df MD |
533 | mask &= 0x0f; |
534 | val &= 0x0f; | |
535 | if (parport_prologue(pp) < 0) | |
536 | return 0; | |
537 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
63b91767 | 538 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
539 | dcr = mos_parport->shadowDCR & 0x0f; |
540 | parport_epilogue(pp); | |
541 | return dcr; | |
542 | } | |
543 | ||
544 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
545 | { | |
546 | unsigned char status; | |
547 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 548 | |
b69578df MD |
549 | spin_lock(&release_lock); |
550 | mos_parport = pp->private_data; | |
551 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
552 | spin_unlock(&release_lock); | |
553 | return 0; | |
554 | } | |
555 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
556 | spin_unlock(&release_lock); | |
557 | return status; | |
558 | } | |
559 | ||
560 | static void parport_mos7715_enable_irq(struct parport *pp) | |
561 | { | |
b69578df | 562 | } |
ca09907d | 563 | |
b69578df MD |
564 | static void parport_mos7715_disable_irq(struct parport *pp) |
565 | { | |
b69578df MD |
566 | } |
567 | ||
568 | static void parport_mos7715_data_forward(struct parport *pp) | |
569 | { | |
570 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 571 | |
b69578df MD |
572 | if (parport_prologue(pp) < 0) |
573 | return; | |
574 | mos7715_change_mode(mos_parport, PS2); | |
575 | mos_parport->shadowDCR &= ~0x20; | |
63b91767 | 576 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
577 | parport_epilogue(pp); |
578 | } | |
579 | ||
580 | static void parport_mos7715_data_reverse(struct parport *pp) | |
581 | { | |
582 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 583 | |
b69578df MD |
584 | if (parport_prologue(pp) < 0) |
585 | return; | |
586 | mos7715_change_mode(mos_parport, PS2); | |
587 | mos_parport->shadowDCR |= 0x20; | |
63b91767 | 588 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
589 | parport_epilogue(pp); |
590 | } | |
591 | ||
592 | static void parport_mos7715_init_state(struct pardevice *dev, | |
593 | struct parport_state *s) | |
594 | { | |
b69578df MD |
595 | s->u.pc.ctr = DCR_INIT_VAL; |
596 | s->u.pc.ecr = ECR_INIT_VAL; | |
597 | } | |
598 | ||
599 | /* N.B. Parport core code requires that this function not block */ | |
600 | static void parport_mos7715_save_state(struct parport *pp, | |
601 | struct parport_state *s) | |
602 | { | |
603 | struct mos7715_parport *mos_parport; | |
ca09907d | 604 | |
b69578df MD |
605 | spin_lock(&release_lock); |
606 | mos_parport = pp->private_data; | |
607 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
608 | spin_unlock(&release_lock); | |
609 | return; | |
610 | } | |
611 | s->u.pc.ctr = mos_parport->shadowDCR; | |
612 | s->u.pc.ecr = mos_parport->shadowECR; | |
613 | spin_unlock(&release_lock); | |
614 | } | |
615 | ||
616 | /* N.B. Parport core code requires that this function not block */ | |
617 | static void parport_mos7715_restore_state(struct parport *pp, | |
618 | struct parport_state *s) | |
619 | { | |
620 | struct mos7715_parport *mos_parport; | |
ca09907d | 621 | |
b69578df MD |
622 | spin_lock(&release_lock); |
623 | mos_parport = pp->private_data; | |
624 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
625 | spin_unlock(&release_lock); | |
626 | return; | |
627 | } | |
628 | write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); | |
629 | write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); | |
630 | spin_unlock(&release_lock); | |
631 | } | |
632 | ||
633 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
634 | const void *buffer, | |
635 | size_t len, int flags) | |
636 | { | |
637 | int retval; | |
638 | struct mos7715_parport *mos_parport = pp->private_data; | |
639 | int actual_len; | |
ca09907d | 640 | |
b69578df MD |
641 | if (parport_prologue(pp) < 0) |
642 | return 0; | |
643 | mos7715_change_mode(mos_parport, PPF); | |
644 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
645 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
646 | (void *)buffer, len, &actual_len, | |
647 | MOS_WDR_TIMEOUT); | |
648 | parport_epilogue(pp); | |
649 | if (retval) { | |
650 | dev_err(&mos_parport->serial->dev->dev, | |
651 | "mos7720: usb_bulk_msg() failed: %d", retval); | |
652 | return 0; | |
653 | } | |
654 | return actual_len; | |
655 | } | |
656 | ||
657 | static struct parport_operations parport_mos7715_ops = { | |
658 | .owner = THIS_MODULE, | |
659 | .write_data = parport_mos7715_write_data, | |
660 | .read_data = parport_mos7715_read_data, | |
661 | ||
662 | .write_control = parport_mos7715_write_control, | |
663 | .read_control = parport_mos7715_read_control, | |
664 | .frob_control = parport_mos7715_frob_control, | |
665 | ||
666 | .read_status = parport_mos7715_read_status, | |
667 | ||
668 | .enable_irq = parport_mos7715_enable_irq, | |
669 | .disable_irq = parport_mos7715_disable_irq, | |
670 | ||
671 | .data_forward = parport_mos7715_data_forward, | |
672 | .data_reverse = parport_mos7715_data_reverse, | |
673 | ||
674 | .init_state = parport_mos7715_init_state, | |
675 | .save_state = parport_mos7715_save_state, | |
676 | .restore_state = parport_mos7715_restore_state, | |
677 | ||
678 | .compat_write_data = parport_mos7715_write_compat, | |
679 | ||
680 | .nibble_read_data = parport_ieee1284_read_nibble, | |
681 | .byte_read_data = parport_ieee1284_read_byte, | |
682 | }; | |
683 | ||
684 | /* | |
685 | * Allocate and initialize parallel port control struct, initialize | |
686 | * the parallel port hardware device, and register with the parport subsystem. | |
687 | */ | |
688 | static int mos7715_parport_init(struct usb_serial *serial) | |
689 | { | |
690 | struct mos7715_parport *mos_parport; | |
691 | ||
692 | /* allocate and initialize parallel port control struct */ | |
693 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
694 | if (mos_parport == NULL) { | |
9eecf808 | 695 | dev_dbg(&serial->dev->dev, "%s: kzalloc failed\n", __func__); |
b69578df MD |
696 | return -ENOMEM; |
697 | } | |
698 | mos_parport->msg_pending = false; | |
699 | kref_init(&mos_parport->ref_count); | |
700 | spin_lock_init(&mos_parport->listlock); | |
701 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
702 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
703 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
704 | mos_parport->serial = serial; | |
705 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
706 | (unsigned long) mos_parport); | |
707 | init_completion(&mos_parport->syncmsg_compl); | |
708 | ||
709 | /* cycle parallel port reset bit */ | |
63b91767 MD |
710 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
711 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); | |
b69578df MD |
712 | |
713 | /* initialize device registers */ | |
714 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
63b91767 | 715 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df | 716 | mos_parport->shadowECR = ECR_INIT_VAL; |
63b91767 | 717 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
718 | |
719 | /* register with parport core */ | |
720 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
721 | PARPORT_DMA_NONE, | |
722 | &parport_mos7715_ops); | |
723 | if (mos_parport->pp == NULL) { | |
724 | dev_err(&serial->interface->dev, | |
725 | "Could not register parport\n"); | |
726 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
727 | return -EIO; | |
728 | } | |
729 | mos_parport->pp->private_data = mos_parport; | |
730 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
731 | mos_parport->pp->dev = &serial->interface->dev; | |
732 | parport_announce_port(mos_parport->pp); | |
733 | ||
734 | return 0; | |
735 | } | |
736 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
737 | |
738 | /* | |
739 | * mos7720_interrupt_callback | |
740 | * this is the callback function for when we have received data on the | |
741 | * interrupt endpoint. | |
742 | */ | |
743 | static void mos7720_interrupt_callback(struct urb *urb) | |
744 | { | |
745 | int result; | |
746 | int length; | |
81105984 | 747 | int status = urb->status; |
9eecf808 | 748 | struct device *dev = &urb->dev->dev; |
325b70c2 | 749 | __u8 *data; |
0f64478c GKH |
750 | __u8 sp1; |
751 | __u8 sp2; | |
0f64478c | 752 | |
81105984 | 753 | switch (status) { |
0f64478c GKH |
754 | case 0: |
755 | /* success */ | |
756 | break; | |
757 | case -ECONNRESET: | |
758 | case -ENOENT: | |
759 | case -ESHUTDOWN: | |
760 | /* this urb is terminated, clean up */ | |
9eecf808 | 761 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
762 | return; |
763 | default: | |
9eecf808 | 764 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
765 | goto exit; |
766 | } | |
767 | ||
768 | length = urb->actual_length; | |
769 | data = urb->transfer_buffer; | |
770 | ||
771 | /* Moschip get 4 bytes | |
772 | * Byte 1 IIR Port 1 (port.number is 0) | |
773 | * Byte 2 IIR Port 2 (port.number is 1) | |
774 | * Byte 3 -------------- | |
775 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
776 | |
777 | /* the above description is inverted | |
778 | * oneukum 2007-03-14 */ | |
779 | ||
780 | if (unlikely(length != 4)) { | |
9eecf808 | 781 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
782 | return; |
783 | } | |
784 | ||
325b70c2 ON |
785 | sp1 = data[3]; |
786 | sp2 = data[2]; | |
0f64478c | 787 | |
325b70c2 | 788 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 789 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 790 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
791 | } else { |
792 | switch (sp1 & 0x0f) { | |
793 | case SERIAL_IIR_RLS: | |
9eecf808 | 794 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
795 | break; |
796 | case SERIAL_IIR_CTI: | |
9eecf808 | 797 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
798 | break; |
799 | case SERIAL_IIR_MS: | |
9eecf808 | 800 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
801 | break; |
802 | } | |
803 | ||
804 | switch (sp2 & 0x0f) { | |
805 | case SERIAL_IIR_RLS: | |
9eecf808 | 806 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
807 | break; |
808 | case SERIAL_IIR_CTI: | |
9eecf808 | 809 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
810 | break; |
811 | case SERIAL_IIR_MS: | |
9eecf808 | 812 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
813 | break; |
814 | } | |
815 | } | |
816 | ||
817 | exit: | |
818 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
819 | if (result) | |
9eecf808 | 820 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
0f64478c GKH |
821 | } |
822 | ||
fb088e33 MD |
823 | /* |
824 | * mos7715_interrupt_callback | |
825 | * this is the 7715's callback function for when we have received data on | |
826 | * the interrupt endpoint. | |
827 | */ | |
828 | static void mos7715_interrupt_callback(struct urb *urb) | |
829 | { | |
830 | int result; | |
831 | int length; | |
832 | int status = urb->status; | |
9eecf808 | 833 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
834 | __u8 *data; |
835 | __u8 iir; | |
836 | ||
837 | switch (status) { | |
838 | case 0: | |
839 | /* success */ | |
840 | break; | |
841 | case -ECONNRESET: | |
842 | case -ENOENT: | |
843 | case -ESHUTDOWN: | |
b69578df | 844 | case -ENODEV: |
fb088e33 | 845 | /* this urb is terminated, clean up */ |
9eecf808 | 846 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
847 | return; |
848 | default: | |
9eecf808 | 849 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
850 | goto exit; |
851 | } | |
852 | ||
853 | length = urb->actual_length; | |
854 | data = urb->transfer_buffer; | |
855 | ||
856 | /* Structure of data from 7715 device: | |
857 | * Byte 1: IIR serial Port | |
858 | * Byte 2: unused | |
859 | * Byte 2: DSR parallel port | |
860 | * Byte 4: FIFO status for both */ | |
861 | ||
862 | if (unlikely(length != 4)) { | |
9eecf808 | 863 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
864 | return; |
865 | } | |
866 | ||
867 | iir = data[0]; | |
868 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
869 | switch (iir & 0x0f) { | |
870 | case SERIAL_IIR_RLS: | |
9eecf808 | 871 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n\n"); |
fb088e33 MD |
872 | break; |
873 | case SERIAL_IIR_CTI: | |
9eecf808 | 874 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
875 | break; |
876 | case SERIAL_IIR_MS: | |
9eecf808 | 877 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
878 | break; |
879 | } | |
880 | } | |
881 | ||
b69578df MD |
882 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
883 | { /* update local copy of DSR reg */ | |
884 | struct usb_serial_port *port = urb->context; | |
885 | struct mos7715_parport *mos_parport = port->serial->private; | |
886 | if (unlikely(mos_parport == NULL)) | |
887 | return; | |
888 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
889 | } | |
890 | #endif | |
891 | ||
fb088e33 MD |
892 | exit: |
893 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
894 | if (result) | |
9eecf808 | 895 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
896 | } |
897 | ||
0f64478c GKH |
898 | /* |
899 | * mos7720_bulk_in_callback | |
900 | * this is the callback function for when we have received data on the | |
901 | * bulk in endpoint. | |
902 | */ | |
903 | static void mos7720_bulk_in_callback(struct urb *urb) | |
904 | { | |
81105984 | 905 | int retval; |
0f64478c GKH |
906 | unsigned char *data ; |
907 | struct usb_serial_port *port; | |
0f64478c | 908 | struct tty_struct *tty; |
81105984 | 909 | int status = urb->status; |
0f64478c | 910 | |
81105984 | 911 | if (status) { |
9eecf808 | 912 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
913 | return; |
914 | } | |
915 | ||
b69578df | 916 | port = urb->context; |
0f64478c | 917 | |
9eecf808 | 918 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
919 | |
920 | data = urb->transfer_buffer; | |
921 | ||
4a90f09b | 922 | tty = tty_port_tty_get(&port->port); |
0f64478c | 923 | if (tty && urb->actual_length) { |
0f64478c GKH |
924 | tty_insert_flip_string(tty, data, urb->actual_length); |
925 | tty_flip_buffer_push(tty); | |
926 | } | |
4a90f09b | 927 | tty_kref_put(tty); |
0f64478c | 928 | |
0f64478c | 929 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
930 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
931 | if (retval) | |
9eecf808 | 932 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
933 | } |
934 | } | |
935 | ||
936 | /* | |
937 | * mos7720_bulk_out_data_callback | |
938 | * this is the callback function for when we have finished sending serial | |
939 | * data on the bulk out endpoint. | |
940 | */ | |
941 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
942 | { | |
943 | struct moschip_port *mos7720_port; | |
944 | struct tty_struct *tty; | |
81105984 | 945 | int status = urb->status; |
0f64478c | 946 | |
81105984 | 947 | if (status) { |
9eecf808 | 948 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
949 | return; |
950 | } | |
951 | ||
952 | mos7720_port = urb->context; | |
953 | if (!mos7720_port) { | |
9eecf808 | 954 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
955 | return ; |
956 | } | |
957 | ||
4a90f09b | 958 | tty = tty_port_tty_get(&mos7720_port->port->port); |
0f64478c | 959 | |
b963a844 JS |
960 | if (tty && mos7720_port->open) |
961 | tty_wakeup(tty); | |
4a90f09b | 962 | tty_kref_put(tty); |
0f64478c GKH |
963 | } |
964 | ||
fb088e33 MD |
965 | /* |
966 | * mos77xx_probe | |
967 | * this function installs the appropriate read interrupt endpoint callback | |
968 | * depending on whether the device is a 7720 or 7715, thus avoiding costly | |
969 | * run-time checks in the high-frequency callback routine itself. | |
970 | */ | |
971 | static int mos77xx_probe(struct usb_serial *serial, | |
972 | const struct usb_device_id *id) | |
973 | { | |
974 | if (id->idProduct == MOSCHIP_DEVICE_ID_7715) | |
975 | moschip7720_2port_driver.read_int_callback = | |
976 | mos7715_interrupt_callback; | |
977 | else | |
978 | moschip7720_2port_driver.read_int_callback = | |
979 | mos7720_interrupt_callback; | |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
984 | static int mos77xx_calc_num_ports(struct usb_serial *serial) | |
985 | { | |
986 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
987 | if (product == MOSCHIP_DEVICE_ID_7715) | |
988 | return 1; | |
989 | ||
990 | return 2; | |
991 | } | |
992 | ||
a509a7e4 | 993 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
994 | { |
995 | struct usb_serial *serial; | |
0f64478c | 996 | struct urb *urb; |
0f64478c GKH |
997 | struct moschip_port *mos7720_port; |
998 | int response; | |
999 | int port_number; | |
63b91767 | 1000 | __u8 data; |
fe4b65ec | 1001 | int allocated_urbs = 0; |
0f64478c GKH |
1002 | int j; |
1003 | ||
1004 | serial = port->serial; | |
1005 | ||
1006 | mos7720_port = usb_get_serial_port_data(port); | |
1007 | if (mos7720_port == NULL) | |
1008 | return -ENODEV; | |
1009 | ||
0f64478c GKH |
1010 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
1011 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
1012 | ||
1013 | /* Initialising the write urb pool */ | |
1014 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 1015 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c GKH |
1016 | mos7720_port->write_urb_pool[j] = urb; |
1017 | ||
1018 | if (urb == NULL) { | |
194343d9 | 1019 | dev_err(&port->dev, "No more urbs???\n"); |
0f64478c GKH |
1020 | continue; |
1021 | } | |
1022 | ||
1023 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1024 | GFP_KERNEL); | |
1025 | if (!urb->transfer_buffer) { | |
194343d9 GKH |
1026 | dev_err(&port->dev, |
1027 | "%s-out of memory for urb buffers.\n", | |
1028 | __func__); | |
fe4b65ec ON |
1029 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1030 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1031 | continue; |
1032 | } | |
fe4b65ec | 1033 | allocated_urbs++; |
0f64478c GKH |
1034 | } |
1035 | ||
fe4b65ec ON |
1036 | if (!allocated_urbs) |
1037 | return -ENOMEM; | |
1038 | ||
0f64478c GKH |
1039 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1040 | * | |
1041 | * Register Index | |
2f9ea55c | 1042 | * 0 : THR/RHR |
0f64478c GKH |
1043 | * 1 : IER |
1044 | * 2 : FCR | |
1045 | * 3 : LCR | |
1046 | * 4 : MCR | |
2f9ea55c KS |
1047 | * 5 : LSR |
1048 | * 6 : MSR | |
1049 | * 7 : SPR | |
0f64478c GKH |
1050 | * |
1051 | * 0x08 : SP1/2 Control Reg | |
1052 | */ | |
1053 | port_number = port->number - port->serial->minor; | |
63b91767 MD |
1054 | read_mos_reg(serial, port_number, LSR, &data); |
1055 | ||
9eecf808 | 1056 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1057 | |
63b91767 MD |
1058 | write_mos_reg(serial, dummy, SP1_REG, 0x02); |
1059 | write_mos_reg(serial, dummy, SP2_REG, 0x02); | |
0f64478c | 1060 | |
63b91767 MD |
1061 | write_mos_reg(serial, port_number, IER, 0x00); |
1062 | write_mos_reg(serial, port_number, FCR, 0x00); | |
0f64478c | 1063 | |
63b91767 MD |
1064 | write_mos_reg(serial, port_number, FCR, 0xcf); |
1065 | mos7720_port->shadowLCR = 0x03; | |
1066 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1067 | mos7720_port->shadowMCR = 0x0b; | |
1068 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1069 | |
63b91767 MD |
1070 | write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
1071 | read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); | |
0f64478c | 1072 | data = data | (port->number - port->serial->minor + 1); |
63b91767 MD |
1073 | write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
1074 | mos7720_port->shadowLCR = 0x83; | |
1075 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1076 | write_mos_reg(serial, port_number, THR, 0x0c); | |
1077 | write_mos_reg(serial, port_number, IER, 0x00); | |
1078 | mos7720_port->shadowLCR = 0x03; | |
1079 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1080 | write_mos_reg(serial, port_number, IER, 0x0c); | |
0f64478c | 1081 | |
0f64478c GKH |
1082 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1083 | if (response) | |
4da1a17d AC |
1084 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1085 | __func__, response); | |
0f64478c GKH |
1086 | |
1087 | /* initialize our icount structure */ | |
1088 | memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); | |
1089 | ||
1090 | /* initialize our port settings */ | |
1091 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1092 | ||
1093 | /* send a open port command */ | |
1094 | mos7720_port->open = 1; | |
1095 | ||
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * mos7720_chars_in_buffer | |
1101 | * this function is called by the tty driver when it wants to know how many | |
1102 | * bytes of data we currently have outstanding in the port (data that has | |
1103 | * been written, but hasn't made it out the port yet) | |
1104 | * If successful, we return the number of bytes left to be written in the | |
1105 | * system, | |
1106 | * Otherwise we return a negative error number. | |
1107 | */ | |
95da310e | 1108 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1109 | { |
95da310e | 1110 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1111 | int i; |
1112 | int chars = 0; | |
1113 | struct moschip_port *mos7720_port; | |
1114 | ||
0f64478c | 1115 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1116 | if (mos7720_port == NULL) |
23198fda | 1117 | return 0; |
0f64478c GKH |
1118 | |
1119 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1120 | if (mos7720_port->write_urb_pool[i] && |
1121 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1122 | chars += URB_TRANSFER_BUFFER_SIZE; |
1123 | } | |
9eecf808 | 1124 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0f64478c GKH |
1125 | return chars; |
1126 | } | |
1127 | ||
335f8514 | 1128 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1129 | { |
1130 | struct usb_serial *serial; | |
1131 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1132 | int j; |
1133 | ||
0f64478c GKH |
1134 | serial = port->serial; |
1135 | ||
1136 | mos7720_port = usb_get_serial_port_data(port); | |
1137 | if (mos7720_port == NULL) | |
1138 | return; | |
1139 | ||
1140 | for (j = 0; j < NUM_URBS; ++j) | |
1141 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1142 | ||
1143 | /* Freeing Write URBs */ | |
1144 | for (j = 0; j < NUM_URBS; ++j) { | |
1145 | if (mos7720_port->write_urb_pool[j]) { | |
1146 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1147 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 | 1152 | * and interrupt read if they exists, otherwise nop */ |
a1cd7e99 | 1153 | usb_kill_urb(port->write_urb); |
a1cd7e99 ON |
1154 | usb_kill_urb(port->read_urb); |
1155 | ||
1156 | mutex_lock(&serial->disc_mutex); | |
1157 | /* these commands must not be issued if the device has | |
1158 | * been disconnected */ | |
1159 | if (!serial->disconnected) { | |
63b91767 MD |
1160 | write_mos_reg(serial, port->number - port->serial->minor, |
1161 | MCR, 0x00); | |
1162 | write_mos_reg(serial, port->number - port->serial->minor, | |
1163 | IER, 0x00); | |
0f64478c | 1164 | } |
a1cd7e99 | 1165 | mutex_unlock(&serial->disc_mutex); |
0f64478c | 1166 | mos7720_port->open = 0; |
0f64478c GKH |
1167 | } |
1168 | ||
95da310e | 1169 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1170 | { |
95da310e | 1171 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1172 | unsigned char data; |
0f64478c GKH |
1173 | struct usb_serial *serial; |
1174 | struct moschip_port *mos7720_port; | |
1175 | ||
0f64478c GKH |
1176 | serial = port->serial; |
1177 | ||
1178 | mos7720_port = usb_get_serial_port_data(port); | |
1179 | if (mos7720_port == NULL) | |
1180 | return; | |
1181 | ||
1182 | if (break_state == -1) | |
1183 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1184 | else | |
1185 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1186 | ||
1187 | mos7720_port->shadowLCR = data; | |
63b91767 MD |
1188 | write_mos_reg(serial, port->number - port->serial->minor, |
1189 | LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1190 | } |
1191 | ||
1192 | /* | |
1193 | * mos7720_write_room | |
1194 | * this function is called by the tty driver when it wants to know how many | |
1195 | * bytes of data we can accept for a specific port. | |
1196 | * If successful, we return the amount of room that we have for this port | |
1197 | * Otherwise we return a negative error number. | |
1198 | */ | |
95da310e | 1199 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1200 | { |
95da310e | 1201 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1202 | struct moschip_port *mos7720_port; |
1203 | int room = 0; | |
1204 | int i; | |
1205 | ||
0f64478c | 1206 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1207 | if (mos7720_port == NULL) |
0f64478c | 1208 | return -ENODEV; |
0f64478c | 1209 | |
a5b6f60c | 1210 | /* FIXME: Locking */ |
0f64478c | 1211 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1212 | if (mos7720_port->write_urb_pool[i] && |
1213 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1214 | room += URB_TRANSFER_BUFFER_SIZE; |
1215 | } | |
1216 | ||
9eecf808 | 1217 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1218 | return room; |
1219 | } | |
1220 | ||
95da310e AC |
1221 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1222 | const unsigned char *data, int count) | |
0f64478c GKH |
1223 | { |
1224 | int status; | |
1225 | int i; | |
1226 | int bytes_sent = 0; | |
1227 | int transfer_size; | |
1228 | ||
1229 | struct moschip_port *mos7720_port; | |
1230 | struct usb_serial *serial; | |
1231 | struct urb *urb; | |
1232 | const unsigned char *current_position = data; | |
1233 | ||
0f64478c GKH |
1234 | serial = port->serial; |
1235 | ||
1236 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1237 | if (mos7720_port == NULL) |
0f64478c | 1238 | return -ENODEV; |
0f64478c GKH |
1239 | |
1240 | /* try to find a free urb in the list */ | |
1241 | urb = NULL; | |
1242 | ||
1243 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1244 | if (mos7720_port->write_urb_pool[i] && |
1245 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1246 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1247 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1248 | break; |
1249 | } | |
1250 | } | |
1251 | ||
1252 | if (urb == NULL) { | |
9eecf808 | 1253 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1254 | goto exit; |
1255 | } | |
1256 | ||
1257 | if (urb->transfer_buffer == NULL) { | |
1258 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1259 | GFP_KERNEL); | |
1260 | if (urb->transfer_buffer == NULL) { | |
22a416c4 | 1261 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1262 | __func__); |
0f64478c GKH |
1263 | goto exit; |
1264 | } | |
1265 | } | |
4da1a17d | 1266 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1267 | |
1268 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1269 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1270 | urb->transfer_buffer); |
1271 | ||
1272 | /* fill urb with data and submit */ | |
1273 | usb_fill_bulk_urb(urb, serial->dev, | |
1274 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1275 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1276 | urb->transfer_buffer, transfer_size, |
1277 | mos7720_bulk_out_data_callback, mos7720_port); | |
1278 | ||
1279 | /* send it down the pipe */ | |
4da1a17d | 1280 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1281 | if (status) { |
22a416c4 | 1282 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1283 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1284 | bytes_sent = status; |
1285 | goto exit; | |
1286 | } | |
1287 | bytes_sent = transfer_size; | |
1288 | ||
1289 | exit: | |
1290 | return bytes_sent; | |
1291 | } | |
1292 | ||
95da310e | 1293 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1294 | { |
95da310e | 1295 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1296 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1297 | int status; |
1298 | ||
0f64478c GKH |
1299 | mos7720_port = usb_get_serial_port_data(port); |
1300 | ||
1301 | if (mos7720_port == NULL) | |
1302 | return; | |
1303 | ||
1304 | if (!mos7720_port->open) { | |
9eecf808 | 1305 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1306 | return; |
1307 | } | |
1308 | ||
0f64478c GKH |
1309 | /* if we are implementing XON/XOFF, send the stop character */ |
1310 | if (I_IXOFF(tty)) { | |
1311 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1312 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1313 | if (status <= 0) |
1314 | return; | |
1315 | } | |
1316 | ||
1317 | /* if we are implementing RTS/CTS, toggle that line */ | |
1318 | if (tty->termios->c_cflag & CRTSCTS) { | |
1319 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; | |
63b91767 MD |
1320 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1321 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1322 | if (status != 0) |
1323 | return; | |
1324 | } | |
1325 | } | |
1326 | ||
95da310e | 1327 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1328 | { |
95da310e | 1329 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1330 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1331 | int status; |
0f64478c GKH |
1332 | |
1333 | if (mos7720_port == NULL) | |
1334 | return; | |
1335 | ||
1336 | if (!mos7720_port->open) { | |
9eecf808 | 1337 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1338 | return; |
1339 | } | |
1340 | ||
0f64478c GKH |
1341 | /* if we are implementing XON/XOFF, send the start character */ |
1342 | if (I_IXOFF(tty)) { | |
1343 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1344 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1345 | if (status <= 0) |
1346 | return; | |
1347 | } | |
1348 | ||
1349 | /* if we are implementing RTS/CTS, toggle that line */ | |
1350 | if (tty->termios->c_cflag & CRTSCTS) { | |
1351 | mos7720_port->shadowMCR |= UART_MCR_RTS; | |
63b91767 MD |
1352 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1353 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1354 | if (status != 0) |
1355 | return; | |
1356 | } | |
1357 | } | |
1358 | ||
b69578df | 1359 | /* FIXME: this function does not work */ |
0f64478c GKH |
1360 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1361 | unsigned int baud) | |
1362 | { | |
0f64478c GKH |
1363 | struct usb_serial_port *port; |
1364 | struct usb_serial *serial; | |
1365 | int port_number; | |
63b91767 | 1366 | enum mos_regs sp_reg; |
0f64478c GKH |
1367 | if (mos7720_port == NULL) |
1368 | return -EINVAL; | |
1369 | ||
1370 | port = mos7720_port->port; | |
1371 | serial = port->serial; | |
1372 | ||
4da1a17d AC |
1373 | /*********************************************** |
1374 | * Init Sequence for higher rates | |
1375 | ***********************************************/ | |
9eecf808 | 1376 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
0f64478c GKH |
1377 | port_number = port->number - port->serial->minor; |
1378 | ||
63b91767 MD |
1379 | write_mos_reg(serial, port_number, IER, 0x00); |
1380 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1381 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
1382 | mos7720_port->shadowMCR = 0x0b; | |
1383 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
1384 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); | |
0f64478c | 1385 | |
4da1a17d AC |
1386 | /*********************************************** |
1387 | * Set for higher rates * | |
1388 | ***********************************************/ | |
b69578df | 1389 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 MD |
1390 | if (port_number == 0) |
1391 | sp_reg = SP1_REG; | |
1392 | else | |
1393 | sp_reg = SP2_REG; | |
1394 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); | |
1395 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); | |
1396 | mos7720_port->shadowMCR = 0x2b; | |
1397 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1398 | |
4da1a17d AC |
1399 | /*********************************************** |
1400 | * Set DLL/DLM | |
1401 | ***********************************************/ | |
63b91767 MD |
1402 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1403 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1404 | write_mos_reg(serial, port_number, DLL, 0x01); | |
1405 | write_mos_reg(serial, port_number, DLM, 0x00); | |
1406 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1407 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1408 | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | /* baud rate information */ | |
4da1a17d | 1413 | struct divisor_table_entry { |
0f64478c GKH |
1414 | __u32 baudrate; |
1415 | __u16 divisor; | |
1416 | }; | |
1417 | ||
1418 | /* Define table of divisors for moschip 7720 hardware * | |
1419 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1420 | * MCR.7 = 0. */ | |
1421 | static struct divisor_table_entry divisor_table[] = { | |
1422 | { 50, 2304}, | |
1423 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1424 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1425 | { 150, 768}, | |
1426 | { 300, 384}, | |
1427 | { 600, 192}, | |
1428 | { 1200, 96}, | |
1429 | { 1800, 64}, | |
1430 | { 2400, 48}, | |
1431 | { 4800, 24}, | |
1432 | { 7200, 16}, | |
1433 | { 9600, 12}, | |
1434 | { 19200, 6}, | |
1435 | { 38400, 3}, | |
1436 | { 57600, 2}, | |
1437 | { 115200, 1}, | |
1438 | }; | |
1439 | ||
1440 | /***************************************************************************** | |
1441 | * calc_baud_rate_divisor | |
1442 | * this function calculates the proper baud rate divisor for the specified | |
1443 | * baud rate. | |
1444 | *****************************************************************************/ | |
9eecf808 | 1445 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1446 | { |
1447 | int i; | |
1448 | __u16 custom; | |
1449 | __u16 round1; | |
1450 | __u16 round; | |
1451 | ||
1452 | ||
9eecf808 | 1453 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1454 | |
1455 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1456 | if (divisor_table[i].baudrate == baudrate) { | |
1457 | *divisor = divisor_table[i].divisor; | |
1458 | return 0; | |
1459 | } | |
1460 | } | |
1461 | ||
4da1a17d AC |
1462 | /* After trying for all the standard baud rates * |
1463 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1464 | if (baudrate > 75 && baudrate < 230400) { |
1465 | /* get the divisor */ | |
1466 | custom = (__u16)(230400L / baudrate); | |
1467 | ||
1468 | /* Check for round off */ | |
1469 | round1 = (__u16)(2304000L / baudrate); | |
1470 | round = (__u16)(round1 - (custom * 10)); | |
1471 | if (round > 4) | |
1472 | custom++; | |
1473 | *divisor = custom; | |
1474 | ||
9eecf808 | 1475 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1476 | return 0; |
1477 | } | |
1478 | ||
9eecf808 | 1479 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1480 | return -EINVAL; |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * send_cmd_write_baud_rate | |
1485 | * this function sends the proper command to change the baud rate of the | |
1486 | * specified port. | |
1487 | */ | |
1488 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1489 | int baudrate) | |
1490 | { | |
1491 | struct usb_serial_port *port; | |
1492 | struct usb_serial *serial; | |
1493 | int divisor; | |
1494 | int status; | |
0f64478c GKH |
1495 | unsigned char number; |
1496 | ||
1497 | if (mos7720_port == NULL) | |
1498 | return -1; | |
1499 | ||
1500 | port = mos7720_port->port; | |
1501 | serial = port->serial; | |
1502 | ||
0f64478c | 1503 | number = port->number - port->serial->minor; |
9eecf808 | 1504 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1505 | |
4da1a17d | 1506 | /* Calculate the Divisor */ |
9eecf808 | 1507 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1508 | if (status) { |
194343d9 | 1509 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1510 | return status; |
1511 | } | |
1512 | ||
4da1a17d | 1513 | /* Enable access to divisor latch */ |
63b91767 MD |
1514 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1515 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1516 | |
1517 | /* Write the divisor */ | |
63b91767 MD |
1518 | write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
1519 | write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1520 | |
4da1a17d | 1521 | /* Disable access to divisor latch */ |
63b91767 MD |
1522 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
1523 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1524 | |
1525 | return status; | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * change_port_settings | |
1530 | * This routine is called to set the UART on the device to match | |
1531 | * the specified new settings. | |
1532 | */ | |
95da310e AC |
1533 | static void change_port_settings(struct tty_struct *tty, |
1534 | struct moschip_port *mos7720_port, | |
606d099c | 1535 | struct ktermios *old_termios) |
0f64478c GKH |
1536 | { |
1537 | struct usb_serial_port *port; | |
1538 | struct usb_serial *serial; | |
0f64478c GKH |
1539 | int baud; |
1540 | unsigned cflag; | |
1541 | unsigned iflag; | |
1542 | __u8 mask = 0xff; | |
1543 | __u8 lData; | |
1544 | __u8 lParity; | |
1545 | __u8 lStop; | |
1546 | int status; | |
1547 | int port_number; | |
0f64478c GKH |
1548 | |
1549 | if (mos7720_port == NULL) | |
1550 | return ; | |
1551 | ||
1552 | port = mos7720_port->port; | |
1553 | serial = port->serial; | |
1554 | port_number = port->number - port->serial->minor; | |
1555 | ||
0f64478c | 1556 | if (!mos7720_port->open) { |
9eecf808 | 1557 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1558 | return; |
1559 | } | |
1560 | ||
0f64478c GKH |
1561 | lData = UART_LCR_WLEN8; |
1562 | lStop = 0x00; /* 1 stop bit */ | |
1563 | lParity = 0x00; /* No parity */ | |
1564 | ||
1565 | cflag = tty->termios->c_cflag; | |
1566 | iflag = tty->termios->c_iflag; | |
1567 | ||
1568 | /* Change the number of bits */ | |
1569 | switch (cflag & CSIZE) { | |
1570 | case CS5: | |
1571 | lData = UART_LCR_WLEN5; | |
1572 | mask = 0x1f; | |
1573 | break; | |
1574 | ||
1575 | case CS6: | |
1576 | lData = UART_LCR_WLEN6; | |
1577 | mask = 0x3f; | |
1578 | break; | |
1579 | ||
1580 | case CS7: | |
1581 | lData = UART_LCR_WLEN7; | |
1582 | mask = 0x7f; | |
1583 | break; | |
1584 | default: | |
1585 | case CS8: | |
1586 | lData = UART_LCR_WLEN8; | |
1587 | break; | |
1588 | } | |
1589 | ||
1590 | /* Change the Parity bit */ | |
1591 | if (cflag & PARENB) { | |
1592 | if (cflag & PARODD) { | |
1593 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1594 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1595 | } else { |
1596 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1597 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1598 | } |
1599 | ||
1600 | } else { | |
9eecf808 | 1601 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1602 | } |
1603 | ||
1604 | if (cflag & CMSPAR) | |
1605 | lParity = lParity | 0x20; | |
1606 | ||
1607 | /* Change the Stop bit */ | |
1608 | if (cflag & CSTOPB) { | |
1609 | lStop = UART_LCR_STOP; | |
9eecf808 | 1610 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1611 | } else { |
1612 | lStop = 0x00; | |
9eecf808 | 1613 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1614 | } |
1615 | ||
1616 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1617 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1618 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1619 | ||
1620 | /* Update the LCR with the correct value */ | |
4da1a17d | 1621 | mos7720_port->shadowLCR &= |
63b91767 | 1622 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1623 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1624 | ||
1625 | ||
1626 | /* Disable Interrupts */ | |
63b91767 MD |
1627 | write_mos_reg(serial, port_number, IER, 0x00); |
1628 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1629 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
0f64478c GKH |
1630 | |
1631 | /* Send the updated LCR value to the mos7720 */ | |
63b91767 MD |
1632 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
1633 | mos7720_port->shadowMCR = 0x0b; | |
1634 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1635 | |
1636 | /* set up the MCR register and send it to the mos7720 */ | |
1637 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1638 | if (cflag & CBAUD) | |
1639 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1640 | ||
1641 | if (cflag & CRTSCTS) { | |
1642 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1643 | /* To set hardware flow control to the specified * |
1644 | * serial port, in SP1/2_CONTROL_REG */ | |
63b91767 MD |
1645 | if (port->number) |
1646 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); | |
1647 | else | |
1648 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); | |
1649 | ||
1650 | } else | |
0f64478c | 1651 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1652 | |
63b91767 | 1653 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
0f64478c GKH |
1654 | |
1655 | /* Determine divisor based on baud rate */ | |
1656 | baud = tty_get_baud_rate(tty); | |
1657 | if (!baud) { | |
1658 | /* pick a default, any default... */ | |
9eecf808 | 1659 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1660 | baud = 9600; |
1661 | } | |
1662 | ||
1663 | if (baud >= 230400) { | |
1664 | set_higher_rates(mos7720_port, baud); | |
1665 | /* Enable Interrupts */ | |
63b91767 | 1666 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1667 | return; |
1668 | } | |
1669 | ||
9eecf808 | 1670 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1671 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1672 | /* FIXME: needs to write actual resulting baud back not just |
1673 | blindly do so */ | |
1674 | if (cflag & CBAUD) | |
1675 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1676 | /* Enable Interrupts */ |
63b91767 | 1677 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1678 | |
1679 | if (port->read_urb->status != -EINPROGRESS) { | |
0f64478c GKH |
1680 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1681 | if (status) | |
9eecf808 | 1682 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1683 | } |
0f64478c GKH |
1684 | } |
1685 | ||
1686 | /* | |
1687 | * mos7720_set_termios | |
1688 | * this function is called by the tty driver when it wants to change the | |
1689 | * termios structure. | |
1690 | */ | |
95da310e AC |
1691 | static void mos7720_set_termios(struct tty_struct *tty, |
1692 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1693 | { |
1694 | int status; | |
1695 | unsigned int cflag; | |
1696 | struct usb_serial *serial; | |
1697 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1698 | |
1699 | serial = port->serial; | |
1700 | ||
1701 | mos7720_port = usb_get_serial_port_data(port); | |
1702 | ||
1703 | if (mos7720_port == NULL) | |
1704 | return; | |
1705 | ||
0f64478c | 1706 | if (!mos7720_port->open) { |
9eecf808 | 1707 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1708 | return; |
1709 | } | |
1710 | ||
9eecf808 | 1711 | dev_dbg(&port->dev, "setting termios - ASPIRE\n"); |
0f64478c GKH |
1712 | |
1713 | cflag = tty->termios->c_cflag; | |
1714 | ||
9eecf808 GKH |
1715 | dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__, |
1716 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); | |
0f64478c | 1717 | |
9eecf808 GKH |
1718 | dev_dbg(&port->dev, "%s - old cflag %08x old iflag %08x\n", __func__, |
1719 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1720 | |
1721 | /* change the port settings to the new ones specified */ | |
95da310e | 1722 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1723 | |
4da1a17d | 1724 | if (port->read_urb->status != -EINPROGRESS) { |
0f64478c GKH |
1725 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1726 | if (status) | |
9eecf808 | 1727 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1728 | } |
0f64478c GKH |
1729 | } |
1730 | ||
1731 | /* | |
1732 | * get_lsr_info - get line status register info | |
1733 | * | |
1734 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1735 | * is emptied. On bus types like RS485, the transmitter must | |
1736 | * release the bus after transmitting. This must be done when | |
1737 | * the transmit shift register is empty, not be done when the | |
1738 | * transmit holding register is empty. This functionality | |
1739 | * allows an RS485 driver to be written in user space. | |
1740 | */ | |
4da1a17d AC |
1741 | static int get_lsr_info(struct tty_struct *tty, |
1742 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1743 | { |
2f9ea55c | 1744 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1745 | unsigned int result = 0; |
2f9ea55c KS |
1746 | unsigned char data = 0; |
1747 | int port_number = port->number - port->serial->minor; | |
1748 | int count; | |
0f64478c | 1749 | |
95da310e | 1750 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1751 | if (count == 0) { |
63b91767 | 1752 | read_mos_reg(port->serial, port_number, LSR, &data); |
2f9ea55c KS |
1753 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1754 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1755 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1756 | result = TIOCSER_TEMT; |
1757 | } | |
0f64478c | 1758 | } |
0f64478c GKH |
1759 | if (copy_to_user(value, &result, sizeof(int))) |
1760 | return -EFAULT; | |
1761 | return 0; | |
1762 | } | |
1763 | ||
60b33c13 | 1764 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1765 | { |
1766 | struct usb_serial_port *port = tty->driver_data; | |
1767 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1768 | unsigned int result = 0; | |
1769 | unsigned int mcr ; | |
1770 | unsigned int msr ; | |
1771 | ||
0f608f89 KS |
1772 | mcr = mos7720_port->shadowMCR; |
1773 | msr = mos7720_port->shadowMSR; | |
1774 | ||
1775 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1776 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1777 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1778 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1779 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1780 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1781 | ||
0f608f89 KS |
1782 | return result; |
1783 | } | |
1784 | ||
20b9d177 | 1785 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1786 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1787 | { |
1788 | struct usb_serial_port *port = tty->driver_data; | |
1789 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1790 | unsigned int mcr ; | |
0f608f89 KS |
1791 | |
1792 | mcr = mos7720_port->shadowMCR; | |
1793 | ||
1794 | if (set & TIOCM_RTS) | |
1795 | mcr |= UART_MCR_RTS; | |
1796 | if (set & TIOCM_DTR) | |
1797 | mcr |= UART_MCR_DTR; | |
1798 | if (set & TIOCM_LOOP) | |
1799 | mcr |= UART_MCR_LOOP; | |
1800 | ||
1801 | if (clear & TIOCM_RTS) | |
1802 | mcr &= ~UART_MCR_RTS; | |
1803 | if (clear & TIOCM_DTR) | |
1804 | mcr &= ~UART_MCR_DTR; | |
1805 | if (clear & TIOCM_LOOP) | |
1806 | mcr &= ~UART_MCR_LOOP; | |
1807 | ||
1808 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1809 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1810 | MCR, mos7720_port->shadowMCR); | |
0f608f89 KS |
1811 | |
1812 | return 0; | |
1813 | } | |
1814 | ||
0bca1b91 AC |
1815 | static int mos7720_get_icount(struct tty_struct *tty, |
1816 | struct serial_icounter_struct *icount) | |
1817 | { | |
1818 | struct usb_serial_port *port = tty->driver_data; | |
1819 | struct moschip_port *mos7720_port; | |
1820 | struct async_icount cnow; | |
1821 | ||
1822 | mos7720_port = usb_get_serial_port_data(port); | |
1823 | cnow = mos7720_port->icount; | |
1824 | ||
1825 | icount->cts = cnow.cts; | |
1826 | icount->dsr = cnow.dsr; | |
1827 | icount->rng = cnow.rng; | |
1828 | icount->dcd = cnow.dcd; | |
1829 | icount->rx = cnow.rx; | |
1830 | icount->tx = cnow.tx; | |
1831 | icount->frame = cnow.frame; | |
1832 | icount->overrun = cnow.overrun; | |
1833 | icount->parity = cnow.parity; | |
1834 | icount->brk = cnow.brk; | |
1835 | icount->buf_overrun = cnow.buf_overrun; | |
1836 | ||
9eecf808 GKH |
1837 | dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__, |
1838 | icount->rx, icount->tx); | |
0bca1b91 AC |
1839 | return 0; |
1840 | } | |
1841 | ||
0f64478c GKH |
1842 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1843 | unsigned int __user *value) | |
1844 | { | |
0bca1b91 | 1845 | unsigned int mcr; |
0f64478c | 1846 | unsigned int arg; |
0f64478c GKH |
1847 | |
1848 | struct usb_serial_port *port; | |
1849 | ||
1850 | if (mos7720_port == NULL) | |
1851 | return -1; | |
1852 | ||
4da1a17d | 1853 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1854 | mcr = mos7720_port->shadowMCR; |
1855 | ||
1856 | if (copy_from_user(&arg, value, sizeof(int))) | |
1857 | return -EFAULT; | |
1858 | ||
1859 | switch (cmd) { | |
1860 | case TIOCMBIS: | |
1861 | if (arg & TIOCM_RTS) | |
1862 | mcr |= UART_MCR_RTS; | |
1863 | if (arg & TIOCM_DTR) | |
1864 | mcr |= UART_MCR_RTS; | |
1865 | if (arg & TIOCM_LOOP) | |
1866 | mcr |= UART_MCR_LOOP; | |
1867 | break; | |
1868 | ||
1869 | case TIOCMBIC: | |
1870 | if (arg & TIOCM_RTS) | |
1871 | mcr &= ~UART_MCR_RTS; | |
1872 | if (arg & TIOCM_DTR) | |
1873 | mcr &= ~UART_MCR_RTS; | |
1874 | if (arg & TIOCM_LOOP) | |
1875 | mcr &= ~UART_MCR_LOOP; | |
1876 | break; | |
1877 | ||
0f64478c GKH |
1878 | } |
1879 | ||
1880 | mos7720_port->shadowMCR = mcr; | |
63b91767 MD |
1881 | write_mos_reg(port->serial, port->number - port->serial->minor, |
1882 | MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1883 | |
1884 | return 0; | |
1885 | } | |
1886 | ||
0f64478c GKH |
1887 | static int get_serial_info(struct moschip_port *mos7720_port, |
1888 | struct serial_struct __user *retinfo) | |
1889 | { | |
1890 | struct serial_struct tmp; | |
1891 | ||
1892 | if (!retinfo) | |
1893 | return -EFAULT; | |
1894 | ||
1895 | memset(&tmp, 0, sizeof(tmp)); | |
1896 | ||
1897 | tmp.type = PORT_16550A; | |
1898 | tmp.line = mos7720_port->port->serial->minor; | |
1899 | tmp.port = mos7720_port->port->number; | |
1900 | tmp.irq = 0; | |
1901 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1902 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1903 | tmp.baud_base = 9600; |
1904 | tmp.close_delay = 5*HZ; | |
1905 | tmp.closing_wait = 30*HZ; | |
1906 | ||
1907 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1908 | return -EFAULT; | |
1909 | return 0; | |
1910 | } | |
1911 | ||
00a0d0d6 | 1912 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1913 | unsigned int cmd, unsigned long arg) |
1914 | { | |
95da310e | 1915 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1916 | struct moschip_port *mos7720_port; |
1917 | struct async_icount cnow; | |
1918 | struct async_icount cprev; | |
0f64478c GKH |
1919 | |
1920 | mos7720_port = usb_get_serial_port_data(port); | |
1921 | if (mos7720_port == NULL) | |
1922 | return -ENODEV; | |
1923 | ||
9eecf808 | 1924 | dev_dbg(&port->dev, "%s - cmd = 0x%x", __func__, cmd); |
0f64478c GKH |
1925 | |
1926 | switch (cmd) { | |
0f64478c | 1927 | case TIOCSERGETLSR: |
9eecf808 | 1928 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1929 | return get_lsr_info(tty, mos7720_port, |
1930 | (unsigned int __user *)arg); | |
0f64478c | 1931 | |
95da310e | 1932 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1933 | case TIOCMBIS: |
1934 | case TIOCMBIC: | |
9eecf808 | 1935 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1936 | return set_modem_info(mos7720_port, cmd, |
1937 | (unsigned int __user *)arg); | |
1938 | ||
0f64478c | 1939 | case TIOCGSERIAL: |
9eecf808 | 1940 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1941 | return get_serial_info(mos7720_port, |
1942 | (struct serial_struct __user *)arg); | |
1943 | ||
0f64478c | 1944 | case TIOCMIWAIT: |
9eecf808 | 1945 | dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__); |
0f64478c GKH |
1946 | cprev = mos7720_port->icount; |
1947 | while (1) { | |
1948 | if (signal_pending(current)) | |
1949 | return -ERESTARTSYS; | |
1950 | cnow = mos7720_port->icount; | |
1951 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1952 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1953 | return -EIO; /* no change => error */ | |
1954 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1955 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1956 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
4da1a17d | 1957 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { |
0f64478c GKH |
1958 | return 0; |
1959 | } | |
1960 | cprev = cnow; | |
1961 | } | |
1962 | /* NOTREACHED */ | |
1963 | break; | |
0f64478c GKH |
1964 | } |
1965 | ||
1966 | return -ENOIOCTLCMD; | |
1967 | } | |
1968 | ||
1969 | static int mos7720_startup(struct usb_serial *serial) | |
1970 | { | |
0f64478c GKH |
1971 | struct moschip_port *mos7720_port; |
1972 | struct usb_device *dev; | |
1973 | int i; | |
1974 | char data; | |
91f58ae6 | 1975 | u16 product; |
b69578df | 1976 | int ret_val; |
0f64478c | 1977 | |
91f58ae6 | 1978 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
1979 | dev = serial->dev; |
1980 | ||
fb088e33 MD |
1981 | /* |
1982 | * The 7715 uses the first bulk in/out endpoint pair for the parallel | |
1983 | * port, and the second for the serial port. Because the usbserial core | |
1984 | * assumes both pairs are serial ports, we must engage in a bit of | |
1985 | * subterfuge and swap the pointers for ports 0 and 1 in order to make | |
1986 | * port 0 point to the serial port. However, both moschip devices use a | |
1987 | * single interrupt-in endpoint for both ports (as mentioned a little | |
1988 | * further down), and this endpoint was assigned to port 0. So after | |
1989 | * the swap, we must copy the interrupt endpoint elements from port 1 | |
1990 | * (as newly assigned) to port 0, and null out port 1 pointers. | |
1991 | */ | |
1992 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1993 | struct usb_serial_port *tmp = serial->port[0]; | |
1994 | serial->port[0] = serial->port[1]; | |
1995 | serial->port[1] = tmp; | |
1996 | serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; | |
1997 | serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; | |
1998 | serial->port[0]->interrupt_in_endpointAddress = | |
1999 | tmp->interrupt_in_endpointAddress; | |
2000 | serial->port[1]->interrupt_in_urb = NULL; | |
2001 | serial->port[1]->interrupt_in_buffer = NULL; | |
2002 | } | |
2003 | ||
0f64478c | 2004 | |
b69578df | 2005 | /* set up serial port private structures */ |
0f64478c GKH |
2006 | for (i = 0; i < serial->num_ports; ++i) { |
2007 | mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
2008 | if (mos7720_port == NULL) { | |
194343d9 | 2009 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
0f64478c GKH |
2010 | return -ENOMEM; |
2011 | } | |
2012 | ||
2013 | /* Initialize all port interrupt end point to port 0 int | |
2014 | * endpoint. Our device has only one interrupt endpoint | |
fb088e33 | 2015 | * common to all ports */ |
4da1a17d AC |
2016 | serial->port[i]->interrupt_in_endpointAddress = |
2017 | serial->port[0]->interrupt_in_endpointAddress; | |
0f64478c GKH |
2018 | |
2019 | mos7720_port->port = serial->port[i]; | |
2020 | usb_set_serial_port_data(serial->port[i], mos7720_port); | |
2021 | ||
9eecf808 GKH |
2022 | dev_dbg(&dev->dev, "port number is %d\n", serial->port[i]->number); |
2023 | dev_dbg(&dev->dev, "serial number is %d\n", serial->minor); | |
0f64478c GKH |
2024 | } |
2025 | ||
2026 | ||
2027 | /* setting configuration feature to one */ | |
2028 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
4da1a17d | 2029 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5*HZ); |
0f64478c | 2030 | |
b69578df MD |
2031 | /* start the interrupt urb */ |
2032 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
2033 | if (ret_val) | |
2034 | dev_err(&dev->dev, | |
2035 | "%s - Error %d submitting control urb\n", | |
2036 | __func__, ret_val); | |
2037 | ||
2038 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
2039 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
2040 | ret_val = mos7715_parport_init(serial); | |
2041 | if (ret_val < 0) | |
2042 | return ret_val; | |
2043 | } | |
2044 | #endif | |
4da1a17d | 2045 | /* LSR For Port 1 */ |
63b91767 | 2046 | read_mos_reg(serial, 0, LSR, &data); |
9eecf808 | 2047 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
2048 | |
2049 | return 0; | |
2050 | } | |
2051 | ||
f9c99bb8 | 2052 | static void mos7720_release(struct usb_serial *serial) |
0f64478c GKH |
2053 | { |
2054 | int i; | |
2055 | ||
b69578df MD |
2056 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
2057 | /* close the parallel port */ | |
2058 | ||
2059 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
2060 | == MOSCHIP_DEVICE_ID_7715) { | |
2061 | struct urbtracker *urbtrack; | |
2062 | unsigned long flags; | |
2063 | struct mos7715_parport *mos_parport = | |
2064 | usb_get_serial_data(serial); | |
2065 | ||
2066 | /* prevent NULL ptr dereference in port callbacks */ | |
2067 | spin_lock(&release_lock); | |
2068 | mos_parport->pp->private_data = NULL; | |
2069 | spin_unlock(&release_lock); | |
2070 | ||
2071 | /* wait for synchronous usb calls to return */ | |
2072 | if (mos_parport->msg_pending) | |
2073 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
2074 | MOS_WDR_TIMEOUT); | |
2075 | ||
2076 | parport_remove_port(mos_parport->pp); | |
2077 | usb_set_serial_data(serial, NULL); | |
2078 | mos_parport->serial = NULL; | |
2079 | ||
2080 | /* if tasklet currently scheduled, wait for it to complete */ | |
2081 | tasklet_kill(&mos_parport->urb_tasklet); | |
2082 | ||
2083 | /* unlink any urbs sent by the tasklet */ | |
2084 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
2085 | list_for_each_entry(urbtrack, | |
2086 | &mos_parport->active_urbs, | |
2087 | urblist_entry) | |
2088 | usb_unlink_urb(urbtrack->urb); | |
2089 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
2090 | ||
2091 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
2092 | } | |
2093 | #endif | |
0f64478c | 2094 | /* free private structure allocated for serial port */ |
f9c99bb8 | 2095 | for (i = 0; i < serial->num_ports; ++i) |
0f64478c | 2096 | kfree(usb_get_serial_port_data(serial->port[i])); |
0f64478c GKH |
2097 | } |
2098 | ||
2099 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2100 | .driver = { | |
2101 | .owner = THIS_MODULE, | |
2102 | .name = "moschip7720", | |
2103 | }, | |
2104 | .description = "Moschip 2 port adapter", | |
68e24113 | 2105 | .id_table = id_table, |
fb088e33 | 2106 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2107 | .open = mos7720_open, |
2108 | .close = mos7720_close, | |
2109 | .throttle = mos7720_throttle, | |
2110 | .unthrottle = mos7720_unthrottle, | |
fb088e33 | 2111 | .probe = mos77xx_probe, |
0f64478c | 2112 | .attach = mos7720_startup, |
f9c99bb8 | 2113 | .release = mos7720_release, |
0f64478c | 2114 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2115 | .tiocmget = mos7720_tiocmget, |
2116 | .tiocmset = mos7720_tiocmset, | |
0bca1b91 | 2117 | .get_icount = mos7720_get_icount, |
0f64478c GKH |
2118 | .set_termios = mos7720_set_termios, |
2119 | .write = mos7720_write, | |
2120 | .write_room = mos7720_write_room, | |
2121 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2122 | .break_ctl = mos7720_break, | |
2123 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fb088e33 | 2124 | .read_int_callback = NULL /* dynamically assigned in probe() */ |
0f64478c GKH |
2125 | }; |
2126 | ||
4d2a7aff AS |
2127 | static struct usb_serial_driver * const serial_drivers[] = { |
2128 | &moschip7720_2port_driver, NULL | |
2129 | }; | |
2130 | ||
68e24113 | 2131 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2132 | |
4da1a17d AC |
2133 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2134 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c GKH |
2135 | MODULE_LICENSE("GPL"); |
2136 | ||
2137 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2138 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |