Commit | Line | Data |
---|---|---|
0f64478c GKH |
1 | /* |
2 | * mos7720.c | |
cd8c5053 | 3 | * Controls the Moschip 7720 usb to dual port serial converter |
0f64478c GKH |
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> | |
0f64478c GKH |
25 | #include <linux/slab.h> |
26 | #include <linux/tty.h> | |
27 | #include <linux/tty_driver.h> | |
28 | #include <linux/tty_flip.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/serial.h> | |
32 | #include <linux/serial_reg.h> | |
33 | #include <linux/usb.h> | |
34 | #include <linux/usb/serial.h> | |
4da1a17d | 35 | #include <linux/uaccess.h> |
b69578df | 36 | #include <linux/parport.h> |
0f64478c | 37 | |
0f64478c GKH |
38 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
39 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
40 | ||
41 | /* default urb timeout */ | |
849513a7 | 42 | #define MOS_WDR_TIMEOUT 5000 |
0f64478c | 43 | |
0f64478c GKH |
44 | #define MOS_MAX_PORT 0x02 |
45 | #define MOS_WRITE 0x0E | |
46 | #define MOS_READ 0x0D | |
47 | ||
cd8c5053 | 48 | /* Interrupt Routines Defines */ |
0f64478c GKH |
49 | #define SERIAL_IIR_RLS 0x06 |
50 | #define SERIAL_IIR_RDA 0x04 | |
51 | #define SERIAL_IIR_CTI 0x0c | |
52 | #define SERIAL_IIR_THR 0x02 | |
53 | #define SERIAL_IIR_MS 0x00 | |
54 | ||
55 | #define NUM_URBS 16 /* URB Count */ | |
56 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
57 | ||
b69578df | 58 | /* This structure holds all of the local serial port information */ |
4da1a17d | 59 | struct moschip_port { |
0f64478c GKH |
60 | __u8 shadowLCR; /* last LCR value received */ |
61 | __u8 shadowMCR; /* last MCR value received */ | |
62 | __u8 shadowMSR; /* last MSR value received */ | |
63 | char open; | |
0f64478c GKH |
64 | struct usb_serial_port *port; /* loop back to the owner */ |
65 | struct urb *write_urb_pool[NUM_URBS]; | |
66 | }; | |
67 | ||
fb088e33 MD |
68 | static struct usb_serial_driver moschip7720_2port_driver; |
69 | ||
0f64478c GKH |
70 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
71 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
72 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
73 | ||
68e24113 | 74 | static const struct usb_device_id id_table[] = { |
4da1a17d | 75 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 76 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
77 | { } /* terminating entry */ |
78 | }; | |
68e24113 | 79 | MODULE_DEVICE_TABLE(usb, id_table); |
0f64478c | 80 | |
b69578df MD |
81 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
82 | ||
83 | /* initial values for parport regs */ | |
84 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
85 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
86 | ||
87 | struct urbtracker { | |
88 | struct mos7715_parport *mos_parport; | |
89 | struct list_head urblist_entry; | |
90 | struct kref ref_count; | |
91 | struct urb *urb; | |
ef6c8c1d | 92 | struct usb_ctrlrequest *setup; |
b69578df MD |
93 | }; |
94 | ||
95 | enum mos7715_pp_modes { | |
96 | SPP = 0<<5, | |
97 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
98 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
99 | }; | |
100 | ||
101 | struct mos7715_parport { | |
102 | struct parport *pp; /* back to containing struct */ | |
103 | struct kref ref_count; /* to instance of this struct */ | |
104 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
105 | struct list_head active_urbs; /* list async urbs in flight */ | |
106 | spinlock_t listlock; /* protects list access */ | |
107 | bool msg_pending; /* usb sync call pending */ | |
108 | struct completion syncmsg_compl; /* usb sync call completed */ | |
109 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
110 | struct usb_serial *serial; /* back to containing struct */ | |
111 | __u8 shadowECR; /* parallel port regs... */ | |
112 | __u8 shadowDCR; | |
113 | atomic_t shadowDSR; /* updated in int-in callback */ | |
114 | }; | |
115 | ||
116 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
117 | static DEFINE_SPINLOCK(release_lock); | |
118 | ||
63b91767 MD |
119 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
120 | ||
121 | static const unsigned int dummy; /* for clarity in register access fns */ | |
122 | ||
b69578df MD |
123 | enum mos_regs { |
124 | THR, /* serial port regs */ | |
125 | RHR, | |
126 | IER, | |
127 | FCR, | |
128 | ISR, | |
129 | LCR, | |
130 | MCR, | |
131 | LSR, | |
132 | MSR, | |
133 | SPR, | |
134 | DLL, | |
135 | DLM, | |
136 | DPR, /* parallel port regs */ | |
137 | DSR, | |
138 | DCR, | |
139 | ECR, | |
140 | SP1_REG, /* device control regs */ | |
141 | SP2_REG, /* serial port 2 (7720 only) */ | |
142 | PP_REG, | |
143 | SP_CONTROL_REG, | |
144 | }; | |
145 | ||
146 | /* | |
147 | * Return the correct value for the Windex field of the setup packet | |
148 | * for a control endpoint message. See the 7715 datasheet. | |
149 | */ | |
150 | static inline __u16 get_reg_index(enum mos_regs reg) | |
151 | { | |
152 | static const __u16 mos7715_index_lookup_table[] = { | |
153 | 0x00, /* THR */ | |
154 | 0x00, /* RHR */ | |
155 | 0x01, /* IER */ | |
156 | 0x02, /* FCR */ | |
157 | 0x02, /* ISR */ | |
158 | 0x03, /* LCR */ | |
159 | 0x04, /* MCR */ | |
160 | 0x05, /* LSR */ | |
161 | 0x06, /* MSR */ | |
162 | 0x07, /* SPR */ | |
163 | 0x00, /* DLL */ | |
164 | 0x01, /* DLM */ | |
165 | 0x00, /* DPR */ | |
166 | 0x01, /* DSR */ | |
167 | 0x02, /* DCR */ | |
168 | 0x0a, /* ECR */ | |
169 | 0x01, /* SP1_REG */ | |
170 | 0x02, /* SP2_REG (7720 only) */ | |
171 | 0x04, /* PP_REG (7715 only) */ | |
172 | 0x08, /* SP_CONTROL_REG */ | |
173 | }; | |
174 | return mos7715_index_lookup_table[reg]; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Return the correct value for the upper byte of the Wvalue field of | |
179 | * the setup packet for a control endpoint message. | |
180 | */ | |
63b91767 MD |
181 | static inline __u16 get_reg_value(enum mos_regs reg, |
182 | unsigned int serial_portnum) | |
b69578df MD |
183 | { |
184 | if (reg >= SP1_REG) /* control reg */ | |
185 | return 0x0000; | |
63b91767 MD |
186 | |
187 | else if (reg >= DPR) /* parallel port reg (7715 only) */ | |
b69578df | 188 | return 0x0100; |
63b91767 MD |
189 | |
190 | else /* serial port reg */ | |
191 | return (serial_portnum + 2) << 8; | |
b69578df MD |
192 | } |
193 | ||
194 | /* | |
195 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
196 | * the value field of the setup packet. serial_portnum is ignored for registers |
197 | * not specific to a particular serial port. | |
b69578df | 198 | */ |
63b91767 MD |
199 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
200 | enum mos_regs reg, __u8 data) | |
b69578df | 201 | { |
b69578df MD |
202 | struct usb_device *usbdev = serial->dev; |
203 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
204 | __u8 request = (__u8)0x0e; | |
205 | __u8 requesttype = (__u8)0x40; | |
b69578df | 206 | __u16 index = get_reg_index(reg); |
63b91767 MD |
207 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
208 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
209 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
210 | if (status < 0) |
211 | dev_err(&usbdev->dev, | |
212 | "mos7720: usb_control_msg() failed: %d", status); | |
213 | return status; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
218 | * device is embedded in the value field of the setup packet. serial_portnum is |
219 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 220 | */ |
63b91767 MD |
221 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
222 | enum mos_regs reg, __u8 *data) | |
b69578df | 223 | { |
63b91767 | 224 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
225 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
226 | __u8 request = (__u8)0x0d; | |
227 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 228 | __u16 index = get_reg_index(reg); |
63b91767 | 229 | __u16 value = get_reg_value(reg, serial_portnum); |
72ea18a5 JH |
230 | u8 *buf; |
231 | int status; | |
232 | ||
233 | buf = kmalloc(1, GFP_KERNEL); | |
234 | if (!buf) | |
235 | return -ENOMEM; | |
236 | ||
237 | status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
238 | index, buf, 1, MOS_WDR_TIMEOUT); | |
239 | if (status == 1) | |
240 | *data = *buf; | |
241 | else if (status < 0) | |
b69578df MD |
242 | dev_err(&usbdev->dev, |
243 | "mos7720: usb_control_msg() failed: %d", status); | |
72ea18a5 JH |
244 | kfree(buf); |
245 | ||
b69578df MD |
246 | return status; |
247 | } | |
248 | ||
63b91767 MD |
249 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
250 | ||
b69578df MD |
251 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
252 | enum mos7715_pp_modes mode) | |
253 | { | |
254 | mos_parport->shadowECR = mode; | |
63b91767 | 255 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
256 | return 0; |
257 | } | |
258 | ||
259 | static void destroy_mos_parport(struct kref *kref) | |
260 | { | |
261 | struct mos7715_parport *mos_parport = | |
262 | container_of(kref, struct mos7715_parport, ref_count); | |
263 | ||
b69578df MD |
264 | kfree(mos_parport); |
265 | } | |
266 | ||
267 | static void destroy_urbtracker(struct kref *kref) | |
268 | { | |
269 | struct urbtracker *urbtrack = | |
270 | container_of(kref, struct urbtracker, ref_count); | |
271 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 272 | |
b69578df | 273 | usb_free_urb(urbtrack->urb); |
ef6c8c1d | 274 | kfree(urbtrack->setup); |
b69578df MD |
275 | kfree(urbtrack); |
276 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
277 | } | |
278 | ||
279 | /* | |
280 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
281 | * port callback had to be deferred because the disconnect mutex could not be | |
282 | * obtained at the time. | |
283 | */ | |
284 | static void send_deferred_urbs(unsigned long _mos_parport) | |
285 | { | |
286 | int ret_val; | |
287 | unsigned long flags; | |
288 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 289 | struct urbtracker *urbtrack, *tmp; |
b69578df | 290 | struct list_head *cursor, *next; |
9eecf808 | 291 | struct device *dev; |
b69578df | 292 | |
b69578df MD |
293 | /* if release function ran, game over */ |
294 | if (unlikely(mos_parport->serial == NULL)) | |
295 | return; | |
296 | ||
9eecf808 GKH |
297 | dev = &mos_parport->serial->dev->dev; |
298 | ||
b69578df MD |
299 | /* try again to get the mutex */ |
300 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 301 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
302 | tasklet_schedule(&mos_parport->urb_tasklet); |
303 | return; | |
304 | } | |
305 | ||
306 | /* if device disconnected, game over */ | |
307 | if (unlikely(mos_parport->serial->disconnected)) { | |
308 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
309 | return; | |
310 | } | |
311 | ||
312 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
313 | if (list_empty(&mos_parport->deferred_urbs)) { | |
314 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
315 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 316 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
317 | return; |
318 | } | |
319 | ||
320 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
321 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
322 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 323 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
324 | urblist_entry) { |
325 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 326 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 327 | if (ret_val) { |
9eecf808 | 328 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
329 | list_del(&urbtrack->urblist_entry); |
330 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
331 | } | |
332 | } | |
333 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
334 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
335 | } | |
336 | ||
337 | /* callback for parallel port control urbs submitted asynchronously */ | |
338 | static void async_complete(struct urb *urb) | |
339 | { | |
340 | struct urbtracker *urbtrack = urb->context; | |
341 | int status = urb->status; | |
ca09907d | 342 | |
b69578df | 343 | if (unlikely(status)) |
9eecf808 | 344 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
345 | |
346 | /* remove the urbtracker from the active_urbs list */ | |
347 | spin_lock(&urbtrack->mos_parport->listlock); | |
348 | list_del(&urbtrack->urblist_entry); | |
349 | spin_unlock(&urbtrack->mos_parport->listlock); | |
350 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
351 | } | |
352 | ||
353 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
354 | enum mos_regs reg, __u8 data) | |
355 | { | |
356 | struct urbtracker *urbtrack; | |
357 | int ret_val; | |
358 | unsigned long flags; | |
b69578df MD |
359 | struct usb_serial *serial = mos_parport->serial; |
360 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
361 | |
362 | /* create and initialize the control urb and containing urbtracker */ | |
363 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
10c642d0 | 364 | if (!urbtrack) |
b69578df | 365 | return -ENOMEM; |
10c642d0 | 366 | |
b69578df MD |
367 | kref_get(&mos_parport->ref_count); |
368 | urbtrack->mos_parport = mos_parport; | |
369 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
10c642d0 | 370 | if (!urbtrack->urb) { |
b69578df MD |
371 | kfree(urbtrack); |
372 | return -ENOMEM; | |
373 | } | |
d0bd9a41 | 374 | urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); |
ef6c8c1d JH |
375 | if (!urbtrack->setup) { |
376 | usb_free_urb(urbtrack->urb); | |
377 | kfree(urbtrack); | |
378 | return -ENOMEM; | |
379 | } | |
380 | urbtrack->setup->bRequestType = (__u8)0x40; | |
381 | urbtrack->setup->bRequest = (__u8)0x0e; | |
3b716caf JH |
382 | urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); |
383 | urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); | |
ef6c8c1d | 384 | urbtrack->setup->wLength = 0; |
b69578df MD |
385 | usb_fill_control_urb(urbtrack->urb, usbdev, |
386 | usb_sndctrlpipe(usbdev, 0), | |
ef6c8c1d | 387 | (unsigned char *)urbtrack->setup, |
b69578df MD |
388 | NULL, 0, async_complete, urbtrack); |
389 | kref_init(&urbtrack->ref_count); | |
390 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
391 | ||
392 | /* | |
393 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
394 | * and schedule a tasklet to try again later | |
395 | */ | |
396 | if (!mutex_trylock(&serial->disc_mutex)) { | |
397 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
398 | list_add_tail(&urbtrack->urblist_entry, | |
399 | &mos_parport->deferred_urbs); | |
400 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
401 | tasklet_schedule(&mos_parport->urb_tasklet); | |
9eecf808 | 402 | dev_dbg(&usbdev->dev, "tasklet scheduled"); |
b69578df MD |
403 | return 0; |
404 | } | |
405 | ||
406 | /* bail if device disconnected */ | |
407 | if (serial->disconnected) { | |
408 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
409 | mutex_unlock(&serial->disc_mutex); | |
410 | return -ENODEV; | |
411 | } | |
412 | ||
413 | /* add the tracker to the active_urbs list and submit */ | |
414 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
415 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
416 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
417 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
418 | mutex_unlock(&serial->disc_mutex); | |
419 | if (ret_val) { | |
420 | dev_err(&usbdev->dev, | |
421 | "%s: submit_urb() failed: %d", __func__, ret_val); | |
422 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
423 | list_del(&urbtrack->urblist_entry); | |
424 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
425 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
426 | return ret_val; | |
427 | } | |
428 | return 0; | |
429 | } | |
430 | ||
431 | /* | |
432 | * This is the the common top part of all parallel port callback operations that | |
433 | * send synchronous messages to the device. This implements convoluted locking | |
434 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
435 | * has called our release function, at which point struct mos7715_parport has | |
436 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
437 | * not called the release function yet because someone has a serial port open. | |
438 | * The shared release_lock prevents the first, and the mutex and disconnected | |
439 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
cd8c5053 | 440 | * flag to ensure that all synchronous usb message calls have completed before |
b69578df MD |
441 | * our release function can return. |
442 | */ | |
443 | static int parport_prologue(struct parport *pp) | |
444 | { | |
445 | struct mos7715_parport *mos_parport; | |
446 | ||
447 | spin_lock(&release_lock); | |
448 | mos_parport = pp->private_data; | |
449 | if (unlikely(mos_parport == NULL)) { | |
450 | /* release fn called, port struct destroyed */ | |
451 | spin_unlock(&release_lock); | |
452 | return -1; | |
453 | } | |
454 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
16735d02 | 455 | reinit_completion(&mos_parport->syncmsg_compl); |
b69578df MD |
456 | spin_unlock(&release_lock); |
457 | ||
458 | mutex_lock(&mos_parport->serial->disc_mutex); | |
459 | if (mos_parport->serial->disconnected) { | |
460 | /* device disconnected */ | |
461 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
462 | mos_parport->msg_pending = false; | |
463 | complete(&mos_parport->syncmsg_compl); | |
464 | return -1; | |
465 | } | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | /* | |
cd8c5053 | 471 | * This is the common bottom part of all parallel port functions that send |
b69578df MD |
472 | * synchronous messages to the device. |
473 | */ | |
474 | static inline void parport_epilogue(struct parport *pp) | |
475 | { | |
476 | struct mos7715_parport *mos_parport = pp->private_data; | |
477 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
478 | mos_parport->msg_pending = false; | |
479 | complete(&mos_parport->syncmsg_compl); | |
480 | } | |
481 | ||
482 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
483 | { | |
484 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 485 | |
b69578df MD |
486 | if (parport_prologue(pp) < 0) |
487 | return; | |
488 | mos7715_change_mode(mos_parport, SPP); | |
63b91767 | 489 | write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d); |
b69578df MD |
490 | parport_epilogue(pp); |
491 | } | |
492 | ||
493 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
494 | { | |
495 | struct mos7715_parport *mos_parport = pp->private_data; | |
496 | unsigned char d; | |
ca09907d | 497 | |
b69578df MD |
498 | if (parport_prologue(pp) < 0) |
499 | return 0; | |
63b91767 | 500 | read_mos_reg(mos_parport->serial, dummy, DPR, &d); |
b69578df MD |
501 | parport_epilogue(pp); |
502 | return d; | |
503 | } | |
504 | ||
505 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
506 | { | |
507 | struct mos7715_parport *mos_parport = pp->private_data; | |
508 | __u8 data; | |
ca09907d | 509 | |
b69578df MD |
510 | if (parport_prologue(pp) < 0) |
511 | return; | |
512 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
63b91767 | 513 | write_mos_reg(mos_parport->serial, dummy, DCR, data); |
b69578df MD |
514 | mos_parport->shadowDCR = data; |
515 | parport_epilogue(pp); | |
516 | } | |
517 | ||
518 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
519 | { | |
520 | struct mos7715_parport *mos_parport = pp->private_data; | |
521 | __u8 dcr; | |
ca09907d | 522 | |
b69578df MD |
523 | spin_lock(&release_lock); |
524 | mos_parport = pp->private_data; | |
525 | if (unlikely(mos_parport == NULL)) { | |
526 | spin_unlock(&release_lock); | |
527 | return 0; | |
528 | } | |
529 | dcr = mos_parport->shadowDCR & 0x0f; | |
530 | spin_unlock(&release_lock); | |
531 | return dcr; | |
532 | } | |
533 | ||
534 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
535 | unsigned char mask, | |
536 | unsigned char val) | |
537 | { | |
538 | struct mos7715_parport *mos_parport = pp->private_data; | |
539 | __u8 dcr; | |
ca09907d | 540 | |
b69578df MD |
541 | mask &= 0x0f; |
542 | val &= 0x0f; | |
543 | if (parport_prologue(pp) < 0) | |
544 | return 0; | |
545 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
63b91767 | 546 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
547 | dcr = mos_parport->shadowDCR & 0x0f; |
548 | parport_epilogue(pp); | |
549 | return dcr; | |
550 | } | |
551 | ||
552 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
553 | { | |
554 | unsigned char status; | |
555 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 556 | |
b69578df MD |
557 | spin_lock(&release_lock); |
558 | mos_parport = pp->private_data; | |
559 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
560 | spin_unlock(&release_lock); | |
561 | return 0; | |
562 | } | |
563 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
564 | spin_unlock(&release_lock); | |
565 | return status; | |
566 | } | |
567 | ||
568 | static void parport_mos7715_enable_irq(struct parport *pp) | |
569 | { | |
b69578df | 570 | } |
ca09907d | 571 | |
b69578df MD |
572 | static void parport_mos7715_disable_irq(struct parport *pp) |
573 | { | |
b69578df MD |
574 | } |
575 | ||
576 | static void parport_mos7715_data_forward(struct parport *pp) | |
577 | { | |
578 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 579 | |
b69578df MD |
580 | if (parport_prologue(pp) < 0) |
581 | return; | |
582 | mos7715_change_mode(mos_parport, PS2); | |
583 | mos_parport->shadowDCR &= ~0x20; | |
63b91767 | 584 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
585 | parport_epilogue(pp); |
586 | } | |
587 | ||
588 | static void parport_mos7715_data_reverse(struct parport *pp) | |
589 | { | |
590 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 591 | |
b69578df MD |
592 | if (parport_prologue(pp) < 0) |
593 | return; | |
594 | mos7715_change_mode(mos_parport, PS2); | |
595 | mos_parport->shadowDCR |= 0x20; | |
63b91767 | 596 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df MD |
597 | parport_epilogue(pp); |
598 | } | |
599 | ||
600 | static void parport_mos7715_init_state(struct pardevice *dev, | |
601 | struct parport_state *s) | |
602 | { | |
b69578df MD |
603 | s->u.pc.ctr = DCR_INIT_VAL; |
604 | s->u.pc.ecr = ECR_INIT_VAL; | |
605 | } | |
606 | ||
607 | /* N.B. Parport core code requires that this function not block */ | |
608 | static void parport_mos7715_save_state(struct parport *pp, | |
609 | struct parport_state *s) | |
610 | { | |
611 | struct mos7715_parport *mos_parport; | |
ca09907d | 612 | |
b69578df MD |
613 | spin_lock(&release_lock); |
614 | mos_parport = pp->private_data; | |
615 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
616 | spin_unlock(&release_lock); | |
617 | return; | |
618 | } | |
619 | s->u.pc.ctr = mos_parport->shadowDCR; | |
620 | s->u.pc.ecr = mos_parport->shadowECR; | |
621 | spin_unlock(&release_lock); | |
622 | } | |
623 | ||
624 | /* N.B. Parport core code requires that this function not block */ | |
625 | static void parport_mos7715_restore_state(struct parport *pp, | |
626 | struct parport_state *s) | |
627 | { | |
628 | struct mos7715_parport *mos_parport; | |
ca09907d | 629 | |
b69578df MD |
630 | spin_lock(&release_lock); |
631 | mos_parport = pp->private_data; | |
632 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
633 | spin_unlock(&release_lock); | |
634 | return; | |
635 | } | |
636 | write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); | |
637 | write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); | |
638 | spin_unlock(&release_lock); | |
639 | } | |
640 | ||
641 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
642 | const void *buffer, | |
643 | size_t len, int flags) | |
644 | { | |
645 | int retval; | |
646 | struct mos7715_parport *mos_parport = pp->private_data; | |
647 | int actual_len; | |
ca09907d | 648 | |
b69578df MD |
649 | if (parport_prologue(pp) < 0) |
650 | return 0; | |
651 | mos7715_change_mode(mos_parport, PPF); | |
652 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
653 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
654 | (void *)buffer, len, &actual_len, | |
655 | MOS_WDR_TIMEOUT); | |
656 | parport_epilogue(pp); | |
657 | if (retval) { | |
658 | dev_err(&mos_parport->serial->dev->dev, | |
659 | "mos7720: usb_bulk_msg() failed: %d", retval); | |
660 | return 0; | |
661 | } | |
662 | return actual_len; | |
663 | } | |
664 | ||
665 | static struct parport_operations parport_mos7715_ops = { | |
666 | .owner = THIS_MODULE, | |
667 | .write_data = parport_mos7715_write_data, | |
668 | .read_data = parport_mos7715_read_data, | |
669 | ||
670 | .write_control = parport_mos7715_write_control, | |
671 | .read_control = parport_mos7715_read_control, | |
672 | .frob_control = parport_mos7715_frob_control, | |
673 | ||
674 | .read_status = parport_mos7715_read_status, | |
675 | ||
676 | .enable_irq = parport_mos7715_enable_irq, | |
677 | .disable_irq = parport_mos7715_disable_irq, | |
678 | ||
679 | .data_forward = parport_mos7715_data_forward, | |
680 | .data_reverse = parport_mos7715_data_reverse, | |
681 | ||
682 | .init_state = parport_mos7715_init_state, | |
683 | .save_state = parport_mos7715_save_state, | |
684 | .restore_state = parport_mos7715_restore_state, | |
685 | ||
686 | .compat_write_data = parport_mos7715_write_compat, | |
687 | ||
688 | .nibble_read_data = parport_ieee1284_read_nibble, | |
689 | .byte_read_data = parport_ieee1284_read_byte, | |
690 | }; | |
691 | ||
692 | /* | |
693 | * Allocate and initialize parallel port control struct, initialize | |
694 | * the parallel port hardware device, and register with the parport subsystem. | |
695 | */ | |
696 | static int mos7715_parport_init(struct usb_serial *serial) | |
697 | { | |
698 | struct mos7715_parport *mos_parport; | |
699 | ||
700 | /* allocate and initialize parallel port control struct */ | |
701 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
10c642d0 | 702 | if (!mos_parport) |
b69578df | 703 | return -ENOMEM; |
10c642d0 | 704 | |
b69578df MD |
705 | mos_parport->msg_pending = false; |
706 | kref_init(&mos_parport->ref_count); | |
707 | spin_lock_init(&mos_parport->listlock); | |
708 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
709 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
710 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
711 | mos_parport->serial = serial; | |
712 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
713 | (unsigned long) mos_parport); | |
714 | init_completion(&mos_parport->syncmsg_compl); | |
715 | ||
716 | /* cycle parallel port reset bit */ | |
63b91767 MD |
717 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
718 | write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); | |
b69578df MD |
719 | |
720 | /* initialize device registers */ | |
721 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
63b91767 | 722 | write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
b69578df | 723 | mos_parport->shadowECR = ECR_INIT_VAL; |
63b91767 | 724 | write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR); |
b69578df MD |
725 | |
726 | /* register with parport core */ | |
727 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
728 | PARPORT_DMA_NONE, | |
729 | &parport_mos7715_ops); | |
730 | if (mos_parport->pp == NULL) { | |
731 | dev_err(&serial->interface->dev, | |
732 | "Could not register parport\n"); | |
733 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
734 | return -EIO; | |
735 | } | |
736 | mos_parport->pp->private_data = mos_parport; | |
737 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
738 | mos_parport->pp->dev = &serial->interface->dev; | |
739 | parport_announce_port(mos_parport->pp); | |
740 | ||
741 | return 0; | |
742 | } | |
743 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
744 | |
745 | /* | |
746 | * mos7720_interrupt_callback | |
747 | * this is the callback function for when we have received data on the | |
748 | * interrupt endpoint. | |
749 | */ | |
750 | static void mos7720_interrupt_callback(struct urb *urb) | |
751 | { | |
752 | int result; | |
753 | int length; | |
81105984 | 754 | int status = urb->status; |
9eecf808 | 755 | struct device *dev = &urb->dev->dev; |
325b70c2 | 756 | __u8 *data; |
0f64478c GKH |
757 | __u8 sp1; |
758 | __u8 sp2; | |
0f64478c | 759 | |
81105984 | 760 | switch (status) { |
0f64478c GKH |
761 | case 0: |
762 | /* success */ | |
763 | break; | |
764 | case -ECONNRESET: | |
765 | case -ENOENT: | |
766 | case -ESHUTDOWN: | |
767 | /* this urb is terminated, clean up */ | |
9eecf808 | 768 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
769 | return; |
770 | default: | |
9eecf808 | 771 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
772 | goto exit; |
773 | } | |
774 | ||
775 | length = urb->actual_length; | |
776 | data = urb->transfer_buffer; | |
777 | ||
778 | /* Moschip get 4 bytes | |
779 | * Byte 1 IIR Port 1 (port.number is 0) | |
780 | * Byte 2 IIR Port 2 (port.number is 1) | |
781 | * Byte 3 -------------- | |
782 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
783 | |
784 | /* the above description is inverted | |
785 | * oneukum 2007-03-14 */ | |
786 | ||
787 | if (unlikely(length != 4)) { | |
9eecf808 | 788 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
789 | return; |
790 | } | |
791 | ||
325b70c2 ON |
792 | sp1 = data[3]; |
793 | sp2 = data[2]; | |
0f64478c | 794 | |
325b70c2 | 795 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 796 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 797 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
798 | } else { |
799 | switch (sp1 & 0x0f) { | |
800 | case SERIAL_IIR_RLS: | |
9eecf808 | 801 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
802 | break; |
803 | case SERIAL_IIR_CTI: | |
9eecf808 | 804 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
805 | break; |
806 | case SERIAL_IIR_MS: | |
9eecf808 | 807 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
808 | break; |
809 | } | |
810 | ||
811 | switch (sp2 & 0x0f) { | |
812 | case SERIAL_IIR_RLS: | |
9eecf808 | 813 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
814 | break; |
815 | case SERIAL_IIR_CTI: | |
9eecf808 | 816 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
817 | break; |
818 | case SERIAL_IIR_MS: | |
9eecf808 | 819 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
820 | break; |
821 | } | |
822 | } | |
823 | ||
824 | exit: | |
825 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
826 | if (result) | |
9eecf808 | 827 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
0f64478c GKH |
828 | } |
829 | ||
fb088e33 MD |
830 | /* |
831 | * mos7715_interrupt_callback | |
832 | * this is the 7715's callback function for when we have received data on | |
833 | * the interrupt endpoint. | |
834 | */ | |
835 | static void mos7715_interrupt_callback(struct urb *urb) | |
836 | { | |
837 | int result; | |
838 | int length; | |
839 | int status = urb->status; | |
9eecf808 | 840 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
841 | __u8 *data; |
842 | __u8 iir; | |
843 | ||
844 | switch (status) { | |
845 | case 0: | |
846 | /* success */ | |
847 | break; | |
848 | case -ECONNRESET: | |
849 | case -ENOENT: | |
850 | case -ESHUTDOWN: | |
b69578df | 851 | case -ENODEV: |
fb088e33 | 852 | /* this urb is terminated, clean up */ |
9eecf808 | 853 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
854 | return; |
855 | default: | |
9eecf808 | 856 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
857 | goto exit; |
858 | } | |
859 | ||
860 | length = urb->actual_length; | |
861 | data = urb->transfer_buffer; | |
862 | ||
863 | /* Structure of data from 7715 device: | |
864 | * Byte 1: IIR serial Port | |
865 | * Byte 2: unused | |
866 | * Byte 2: DSR parallel port | |
867 | * Byte 4: FIFO status for both */ | |
868 | ||
869 | if (unlikely(length != 4)) { | |
9eecf808 | 870 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
871 | return; |
872 | } | |
873 | ||
874 | iir = data[0]; | |
875 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
876 | switch (iir & 0x0f) { | |
877 | case SERIAL_IIR_RLS: | |
9eecf808 | 878 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n\n"); |
fb088e33 MD |
879 | break; |
880 | case SERIAL_IIR_CTI: | |
9eecf808 | 881 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
882 | break; |
883 | case SERIAL_IIR_MS: | |
9eecf808 | 884 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
885 | break; |
886 | } | |
887 | } | |
888 | ||
b69578df MD |
889 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
890 | { /* update local copy of DSR reg */ | |
891 | struct usb_serial_port *port = urb->context; | |
892 | struct mos7715_parport *mos_parport = port->serial->private; | |
893 | if (unlikely(mos_parport == NULL)) | |
894 | return; | |
895 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
896 | } | |
897 | #endif | |
898 | ||
fb088e33 MD |
899 | exit: |
900 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
901 | if (result) | |
9eecf808 | 902 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
903 | } |
904 | ||
0f64478c GKH |
905 | /* |
906 | * mos7720_bulk_in_callback | |
907 | * this is the callback function for when we have received data on the | |
908 | * bulk in endpoint. | |
909 | */ | |
910 | static void mos7720_bulk_in_callback(struct urb *urb) | |
911 | { | |
81105984 | 912 | int retval; |
0f64478c GKH |
913 | unsigned char *data ; |
914 | struct usb_serial_port *port; | |
81105984 | 915 | int status = urb->status; |
0f64478c | 916 | |
81105984 | 917 | if (status) { |
9eecf808 | 918 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
919 | return; |
920 | } | |
921 | ||
b69578df | 922 | port = urb->context; |
0f64478c | 923 | |
9eecf808 | 924 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
925 | |
926 | data = urb->transfer_buffer; | |
927 | ||
2e124b4a | 928 | if (urb->actual_length) { |
05c7cd39 | 929 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 930 | tty_flip_buffer_push(&port->port); |
0f64478c GKH |
931 | } |
932 | ||
0f64478c | 933 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
934 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
935 | if (retval) | |
9eecf808 | 936 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
937 | } |
938 | } | |
939 | ||
940 | /* | |
941 | * mos7720_bulk_out_data_callback | |
942 | * this is the callback function for when we have finished sending serial | |
943 | * data on the bulk out endpoint. | |
944 | */ | |
945 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
946 | { | |
947 | struct moschip_port *mos7720_port; | |
81105984 | 948 | int status = urb->status; |
0f64478c | 949 | |
81105984 | 950 | if (status) { |
9eecf808 | 951 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
952 | return; |
953 | } | |
954 | ||
955 | mos7720_port = urb->context; | |
956 | if (!mos7720_port) { | |
9eecf808 | 957 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
958 | return ; |
959 | } | |
960 | ||
6aad04f2 JS |
961 | if (mos7720_port->open) |
962 | tty_port_tty_wakeup(&mos7720_port->port->port); | |
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 | 1016 | mos7720_port->write_urb_pool[j] = urb; |
10c642d0 | 1017 | if (!urb) |
0f64478c | 1018 | continue; |
0f64478c GKH |
1019 | |
1020 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1021 | GFP_KERNEL); | |
1022 | if (!urb->transfer_buffer) { | |
fe4b65ec ON |
1023 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1024 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1025 | continue; |
1026 | } | |
fe4b65ec | 1027 | allocated_urbs++; |
0f64478c GKH |
1028 | } |
1029 | ||
fe4b65ec ON |
1030 | if (!allocated_urbs) |
1031 | return -ENOMEM; | |
1032 | ||
0f64478c GKH |
1033 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1034 | * | |
1035 | * Register Index | |
2f9ea55c | 1036 | * 0 : THR/RHR |
0f64478c GKH |
1037 | * 1 : IER |
1038 | * 2 : FCR | |
1039 | * 3 : LCR | |
1040 | * 4 : MCR | |
2f9ea55c KS |
1041 | * 5 : LSR |
1042 | * 6 : MSR | |
1043 | * 7 : SPR | |
0f64478c GKH |
1044 | * |
1045 | * 0x08 : SP1/2 Control Reg | |
1046 | */ | |
1143832e | 1047 | port_number = port->port_number; |
63b91767 MD |
1048 | read_mos_reg(serial, port_number, LSR, &data); |
1049 | ||
9eecf808 | 1050 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1051 | |
63b91767 MD |
1052 | write_mos_reg(serial, dummy, SP1_REG, 0x02); |
1053 | write_mos_reg(serial, dummy, SP2_REG, 0x02); | |
0f64478c | 1054 | |
63b91767 MD |
1055 | write_mos_reg(serial, port_number, IER, 0x00); |
1056 | write_mos_reg(serial, port_number, FCR, 0x00); | |
0f64478c | 1057 | |
63b91767 MD |
1058 | write_mos_reg(serial, port_number, FCR, 0xcf); |
1059 | mos7720_port->shadowLCR = 0x03; | |
1060 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1061 | mos7720_port->shadowMCR = 0x0b; | |
1062 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1063 | |
63b91767 MD |
1064 | write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
1065 | read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); | |
1143832e | 1066 | data = data | (port->port_number + 1); |
63b91767 MD |
1067 | write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
1068 | mos7720_port->shadowLCR = 0x83; | |
1069 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1070 | write_mos_reg(serial, port_number, THR, 0x0c); | |
1071 | write_mos_reg(serial, port_number, IER, 0x00); | |
1072 | mos7720_port->shadowLCR = 0x03; | |
1073 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1074 | write_mos_reg(serial, port_number, IER, 0x0c); | |
0f64478c | 1075 | |
0f64478c GKH |
1076 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1077 | if (response) | |
4da1a17d AC |
1078 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1079 | __func__, response); | |
0f64478c | 1080 | |
0f64478c GKH |
1081 | /* initialize our port settings */ |
1082 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1083 | ||
1084 | /* send a open port command */ | |
1085 | mos7720_port->open = 1; | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | /* | |
1091 | * mos7720_chars_in_buffer | |
1092 | * this function is called by the tty driver when it wants to know how many | |
1093 | * bytes of data we currently have outstanding in the port (data that has | |
1094 | * been written, but hasn't made it out the port yet) | |
1095 | * If successful, we return the number of bytes left to be written in the | |
1096 | * system, | |
1097 | * Otherwise we return a negative error number. | |
1098 | */ | |
95da310e | 1099 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1100 | { |
95da310e | 1101 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1102 | int i; |
1103 | int chars = 0; | |
1104 | struct moschip_port *mos7720_port; | |
1105 | ||
0f64478c | 1106 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1107 | if (mos7720_port == NULL) |
23198fda | 1108 | return 0; |
0f64478c GKH |
1109 | |
1110 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1111 | if (mos7720_port->write_urb_pool[i] && |
1112 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1113 | chars += URB_TRANSFER_BUFFER_SIZE; |
1114 | } | |
9eecf808 | 1115 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0f64478c GKH |
1116 | return chars; |
1117 | } | |
1118 | ||
335f8514 | 1119 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1120 | { |
1121 | struct usb_serial *serial; | |
1122 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1123 | int j; |
1124 | ||
0f64478c GKH |
1125 | serial = port->serial; |
1126 | ||
1127 | mos7720_port = usb_get_serial_port_data(port); | |
1128 | if (mos7720_port == NULL) | |
1129 | return; | |
1130 | ||
1131 | for (j = 0; j < NUM_URBS; ++j) | |
1132 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1133 | ||
1134 | /* Freeing Write URBs */ | |
1135 | for (j = 0; j < NUM_URBS; ++j) { | |
1136 | if (mos7720_port->write_urb_pool[j]) { | |
1137 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1138 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 | 1143 | * and interrupt read if they exists, otherwise nop */ |
a1cd7e99 | 1144 | usb_kill_urb(port->write_urb); |
a1cd7e99 ON |
1145 | usb_kill_urb(port->read_urb); |
1146 | ||
1143832e GKH |
1147 | write_mos_reg(serial, port->port_number, MCR, 0x00); |
1148 | write_mos_reg(serial, port->port_number, IER, 0x00); | |
cf41aa9e | 1149 | |
0f64478c | 1150 | mos7720_port->open = 0; |
0f64478c GKH |
1151 | } |
1152 | ||
95da310e | 1153 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1154 | { |
95da310e | 1155 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1156 | unsigned char data; |
0f64478c GKH |
1157 | struct usb_serial *serial; |
1158 | struct moschip_port *mos7720_port; | |
1159 | ||
0f64478c GKH |
1160 | serial = port->serial; |
1161 | ||
1162 | mos7720_port = usb_get_serial_port_data(port); | |
1163 | if (mos7720_port == NULL) | |
1164 | return; | |
1165 | ||
1166 | if (break_state == -1) | |
1167 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1168 | else | |
1169 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1170 | ||
1171 | mos7720_port->shadowLCR = data; | |
1143832e | 1172 | write_mos_reg(serial, port->port_number, LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1173 | } |
1174 | ||
1175 | /* | |
1176 | * mos7720_write_room | |
1177 | * this function is called by the tty driver when it wants to know how many | |
1178 | * bytes of data we can accept for a specific port. | |
1179 | * If successful, we return the amount of room that we have for this port | |
1180 | * Otherwise we return a negative error number. | |
1181 | */ | |
95da310e | 1182 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1183 | { |
95da310e | 1184 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1185 | struct moschip_port *mos7720_port; |
1186 | int room = 0; | |
1187 | int i; | |
1188 | ||
0f64478c | 1189 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1190 | if (mos7720_port == NULL) |
0f64478c | 1191 | return -ENODEV; |
0f64478c | 1192 | |
a5b6f60c | 1193 | /* FIXME: Locking */ |
0f64478c | 1194 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1195 | if (mos7720_port->write_urb_pool[i] && |
1196 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1197 | room += URB_TRANSFER_BUFFER_SIZE; |
1198 | } | |
1199 | ||
9eecf808 | 1200 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1201 | return room; |
1202 | } | |
1203 | ||
95da310e AC |
1204 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1205 | const unsigned char *data, int count) | |
0f64478c GKH |
1206 | { |
1207 | int status; | |
1208 | int i; | |
1209 | int bytes_sent = 0; | |
1210 | int transfer_size; | |
1211 | ||
1212 | struct moschip_port *mos7720_port; | |
1213 | struct usb_serial *serial; | |
1214 | struct urb *urb; | |
1215 | const unsigned char *current_position = data; | |
1216 | ||
0f64478c GKH |
1217 | serial = port->serial; |
1218 | ||
1219 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1220 | if (mos7720_port == NULL) |
0f64478c | 1221 | return -ENODEV; |
0f64478c GKH |
1222 | |
1223 | /* try to find a free urb in the list */ | |
1224 | urb = NULL; | |
1225 | ||
1226 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1227 | if (mos7720_port->write_urb_pool[i] && |
1228 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1229 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1230 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1231 | break; |
1232 | } | |
1233 | } | |
1234 | ||
1235 | if (urb == NULL) { | |
9eecf808 | 1236 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1237 | goto exit; |
1238 | } | |
1239 | ||
1240 | if (urb->transfer_buffer == NULL) { | |
1241 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1242 | GFP_KERNEL); | |
10c642d0 | 1243 | if (!urb->transfer_buffer) |
0f64478c | 1244 | goto exit; |
0f64478c | 1245 | } |
4da1a17d | 1246 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1247 | |
1248 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1249 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1250 | urb->transfer_buffer); |
1251 | ||
1252 | /* fill urb with data and submit */ | |
1253 | usb_fill_bulk_urb(urb, serial->dev, | |
1254 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1255 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1256 | urb->transfer_buffer, transfer_size, |
1257 | mos7720_bulk_out_data_callback, mos7720_port); | |
1258 | ||
1259 | /* send it down the pipe */ | |
4da1a17d | 1260 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1261 | if (status) { |
22a416c4 | 1262 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1263 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1264 | bytes_sent = status; |
1265 | goto exit; | |
1266 | } | |
1267 | bytes_sent = transfer_size; | |
1268 | ||
1269 | exit: | |
1270 | return bytes_sent; | |
1271 | } | |
1272 | ||
95da310e | 1273 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1274 | { |
95da310e | 1275 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1276 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1277 | int status; |
1278 | ||
0f64478c GKH |
1279 | mos7720_port = usb_get_serial_port_data(port); |
1280 | ||
1281 | if (mos7720_port == NULL) | |
1282 | return; | |
1283 | ||
1284 | if (!mos7720_port->open) { | |
9eecf808 | 1285 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1286 | return; |
1287 | } | |
1288 | ||
0f64478c GKH |
1289 | /* if we are implementing XON/XOFF, send the stop character */ |
1290 | if (I_IXOFF(tty)) { | |
1291 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1292 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1293 | if (status <= 0) |
1294 | return; | |
1295 | } | |
1296 | ||
1297 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1298 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1299 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
1143832e GKH |
1300 | write_mos_reg(port->serial, port->port_number, MCR, |
1301 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1302 | if (status != 0) |
1303 | return; | |
1304 | } | |
1305 | } | |
1306 | ||
95da310e | 1307 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1308 | { |
95da310e | 1309 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1310 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1311 | int status; |
0f64478c GKH |
1312 | |
1313 | if (mos7720_port == NULL) | |
1314 | return; | |
1315 | ||
1316 | if (!mos7720_port->open) { | |
9eecf808 | 1317 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1318 | return; |
1319 | } | |
1320 | ||
0f64478c GKH |
1321 | /* if we are implementing XON/XOFF, send the start character */ |
1322 | if (I_IXOFF(tty)) { | |
1323 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1324 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1325 | if (status <= 0) |
1326 | return; | |
1327 | } | |
1328 | ||
1329 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1330 | if (tty->termios.c_cflag & CRTSCTS) { |
0f64478c | 1331 | mos7720_port->shadowMCR |= UART_MCR_RTS; |
1143832e GKH |
1332 | write_mos_reg(port->serial, port->port_number, MCR, |
1333 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1334 | if (status != 0) |
1335 | return; | |
1336 | } | |
1337 | } | |
1338 | ||
b69578df | 1339 | /* FIXME: this function does not work */ |
0f64478c GKH |
1340 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1341 | unsigned int baud) | |
1342 | { | |
0f64478c GKH |
1343 | struct usb_serial_port *port; |
1344 | struct usb_serial *serial; | |
1345 | int port_number; | |
63b91767 | 1346 | enum mos_regs sp_reg; |
0f64478c GKH |
1347 | if (mos7720_port == NULL) |
1348 | return -EINVAL; | |
1349 | ||
1350 | port = mos7720_port->port; | |
1351 | serial = port->serial; | |
1352 | ||
4da1a17d AC |
1353 | /*********************************************** |
1354 | * Init Sequence for higher rates | |
1355 | ***********************************************/ | |
9eecf808 | 1356 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
1143832e | 1357 | port_number = port->port_number; |
0f64478c | 1358 | |
63b91767 MD |
1359 | write_mos_reg(serial, port_number, IER, 0x00); |
1360 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1361 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
1362 | mos7720_port->shadowMCR = 0x0b; | |
1363 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
1364 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); | |
0f64478c | 1365 | |
4da1a17d AC |
1366 | /*********************************************** |
1367 | * Set for higher rates * | |
1368 | ***********************************************/ | |
b69578df | 1369 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 MD |
1370 | if (port_number == 0) |
1371 | sp_reg = SP1_REG; | |
1372 | else | |
1373 | sp_reg = SP2_REG; | |
1374 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); | |
1375 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); | |
1376 | mos7720_port->shadowMCR = 0x2b; | |
1377 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c | 1378 | |
4da1a17d AC |
1379 | /*********************************************** |
1380 | * Set DLL/DLM | |
1381 | ***********************************************/ | |
63b91767 MD |
1382 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1383 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
1384 | write_mos_reg(serial, port_number, DLL, 0x01); | |
1385 | write_mos_reg(serial, port_number, DLM, 0x00); | |
1386 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1387 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1388 | |
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | /* baud rate information */ | |
4da1a17d | 1393 | struct divisor_table_entry { |
0f64478c GKH |
1394 | __u32 baudrate; |
1395 | __u16 divisor; | |
1396 | }; | |
1397 | ||
1398 | /* Define table of divisors for moschip 7720 hardware * | |
1399 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1400 | * MCR.7 = 0. */ | |
1401 | static struct divisor_table_entry divisor_table[] = { | |
1402 | { 50, 2304}, | |
1403 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1404 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1405 | { 150, 768}, | |
1406 | { 300, 384}, | |
1407 | { 600, 192}, | |
1408 | { 1200, 96}, | |
1409 | { 1800, 64}, | |
1410 | { 2400, 48}, | |
1411 | { 4800, 24}, | |
1412 | { 7200, 16}, | |
1413 | { 9600, 12}, | |
1414 | { 19200, 6}, | |
1415 | { 38400, 3}, | |
1416 | { 57600, 2}, | |
1417 | { 115200, 1}, | |
1418 | }; | |
1419 | ||
1420 | /***************************************************************************** | |
1421 | * calc_baud_rate_divisor | |
1422 | * this function calculates the proper baud rate divisor for the specified | |
1423 | * baud rate. | |
1424 | *****************************************************************************/ | |
9eecf808 | 1425 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1426 | { |
1427 | int i; | |
1428 | __u16 custom; | |
1429 | __u16 round1; | |
1430 | __u16 round; | |
1431 | ||
1432 | ||
9eecf808 | 1433 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1434 | |
1435 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1436 | if (divisor_table[i].baudrate == baudrate) { | |
1437 | *divisor = divisor_table[i].divisor; | |
1438 | return 0; | |
1439 | } | |
1440 | } | |
1441 | ||
4da1a17d AC |
1442 | /* After trying for all the standard baud rates * |
1443 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1444 | if (baudrate > 75 && baudrate < 230400) { |
1445 | /* get the divisor */ | |
1446 | custom = (__u16)(230400L / baudrate); | |
1447 | ||
1448 | /* Check for round off */ | |
1449 | round1 = (__u16)(2304000L / baudrate); | |
1450 | round = (__u16)(round1 - (custom * 10)); | |
1451 | if (round > 4) | |
1452 | custom++; | |
1453 | *divisor = custom; | |
1454 | ||
9eecf808 | 1455 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1456 | return 0; |
1457 | } | |
1458 | ||
9eecf808 | 1459 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1460 | return -EINVAL; |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * send_cmd_write_baud_rate | |
1465 | * this function sends the proper command to change the baud rate of the | |
1466 | * specified port. | |
1467 | */ | |
1468 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1469 | int baudrate) | |
1470 | { | |
1471 | struct usb_serial_port *port; | |
1472 | struct usb_serial *serial; | |
1473 | int divisor; | |
1474 | int status; | |
0f64478c GKH |
1475 | unsigned char number; |
1476 | ||
1477 | if (mos7720_port == NULL) | |
1478 | return -1; | |
1479 | ||
1480 | port = mos7720_port->port; | |
1481 | serial = port->serial; | |
1482 | ||
1143832e | 1483 | number = port->port_number; |
9eecf808 | 1484 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1485 | |
4da1a17d | 1486 | /* Calculate the Divisor */ |
9eecf808 | 1487 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1488 | if (status) { |
194343d9 | 1489 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1490 | return status; |
1491 | } | |
1492 | ||
4da1a17d | 1493 | /* Enable access to divisor latch */ |
63b91767 MD |
1494 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
1495 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1496 | |
1497 | /* Write the divisor */ | |
63b91767 MD |
1498 | write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
1499 | write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1500 | |
4da1a17d | 1501 | /* Disable access to divisor latch */ |
63b91767 MD |
1502 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
1503 | write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); | |
0f64478c GKH |
1504 | |
1505 | return status; | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | * change_port_settings | |
1510 | * This routine is called to set the UART on the device to match | |
1511 | * the specified new settings. | |
1512 | */ | |
95da310e AC |
1513 | static void change_port_settings(struct tty_struct *tty, |
1514 | struct moschip_port *mos7720_port, | |
606d099c | 1515 | struct ktermios *old_termios) |
0f64478c GKH |
1516 | { |
1517 | struct usb_serial_port *port; | |
1518 | struct usb_serial *serial; | |
0f64478c GKH |
1519 | int baud; |
1520 | unsigned cflag; | |
1521 | unsigned iflag; | |
1522 | __u8 mask = 0xff; | |
1523 | __u8 lData; | |
1524 | __u8 lParity; | |
1525 | __u8 lStop; | |
1526 | int status; | |
1527 | int port_number; | |
0f64478c GKH |
1528 | |
1529 | if (mos7720_port == NULL) | |
1530 | return ; | |
1531 | ||
1532 | port = mos7720_port->port; | |
1533 | serial = port->serial; | |
1143832e | 1534 | port_number = port->port_number; |
0f64478c | 1535 | |
0f64478c | 1536 | if (!mos7720_port->open) { |
9eecf808 | 1537 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1538 | return; |
1539 | } | |
1540 | ||
0f64478c GKH |
1541 | lData = UART_LCR_WLEN8; |
1542 | lStop = 0x00; /* 1 stop bit */ | |
1543 | lParity = 0x00; /* No parity */ | |
1544 | ||
adc8d746 AC |
1545 | cflag = tty->termios.c_cflag; |
1546 | iflag = tty->termios.c_iflag; | |
0f64478c GKH |
1547 | |
1548 | /* Change the number of bits */ | |
1549 | switch (cflag & CSIZE) { | |
1550 | case CS5: | |
1551 | lData = UART_LCR_WLEN5; | |
1552 | mask = 0x1f; | |
1553 | break; | |
1554 | ||
1555 | case CS6: | |
1556 | lData = UART_LCR_WLEN6; | |
1557 | mask = 0x3f; | |
1558 | break; | |
1559 | ||
1560 | case CS7: | |
1561 | lData = UART_LCR_WLEN7; | |
1562 | mask = 0x7f; | |
1563 | break; | |
1564 | default: | |
1565 | case CS8: | |
1566 | lData = UART_LCR_WLEN8; | |
1567 | break; | |
1568 | } | |
1569 | ||
1570 | /* Change the Parity bit */ | |
1571 | if (cflag & PARENB) { | |
1572 | if (cflag & PARODD) { | |
1573 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1574 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1575 | } else { |
1576 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1577 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1578 | } |
1579 | ||
1580 | } else { | |
9eecf808 | 1581 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1582 | } |
1583 | ||
1584 | if (cflag & CMSPAR) | |
1585 | lParity = lParity | 0x20; | |
1586 | ||
1587 | /* Change the Stop bit */ | |
1588 | if (cflag & CSTOPB) { | |
1589 | lStop = UART_LCR_STOP; | |
9eecf808 | 1590 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1591 | } else { |
1592 | lStop = 0x00; | |
9eecf808 | 1593 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1594 | } |
1595 | ||
1596 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1597 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1598 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1599 | ||
1600 | /* Update the LCR with the correct value */ | |
4da1a17d | 1601 | mos7720_port->shadowLCR &= |
63b91767 | 1602 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1603 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1604 | ||
1605 | ||
1606 | /* Disable Interrupts */ | |
63b91767 MD |
1607 | write_mos_reg(serial, port_number, IER, 0x00); |
1608 | write_mos_reg(serial, port_number, FCR, 0x00); | |
1609 | write_mos_reg(serial, port_number, FCR, 0xcf); | |
0f64478c GKH |
1610 | |
1611 | /* Send the updated LCR value to the mos7720 */ | |
63b91767 MD |
1612 | write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
1613 | mos7720_port->shadowMCR = 0x0b; | |
1614 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); | |
0f64478c GKH |
1615 | |
1616 | /* set up the MCR register and send it to the mos7720 */ | |
1617 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1618 | if (cflag & CBAUD) | |
1619 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1620 | ||
1621 | if (cflag & CRTSCTS) { | |
1622 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1623 | /* To set hardware flow control to the specified * |
1624 | * serial port, in SP1/2_CONTROL_REG */ | |
a26f009a | 1625 | if (port_number) |
63b91767 MD |
1626 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); |
1627 | else | |
1628 | write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); | |
1629 | ||
1630 | } else | |
0f64478c | 1631 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1632 | |
63b91767 | 1633 | write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
0f64478c GKH |
1634 | |
1635 | /* Determine divisor based on baud rate */ | |
1636 | baud = tty_get_baud_rate(tty); | |
1637 | if (!baud) { | |
1638 | /* pick a default, any default... */ | |
9eecf808 | 1639 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1640 | baud = 9600; |
1641 | } | |
1642 | ||
1643 | if (baud >= 230400) { | |
1644 | set_higher_rates(mos7720_port, baud); | |
1645 | /* Enable Interrupts */ | |
63b91767 | 1646 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1647 | return; |
1648 | } | |
1649 | ||
9eecf808 | 1650 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1651 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1652 | /* FIXME: needs to write actual resulting baud back not just |
1653 | blindly do so */ | |
1654 | if (cflag & CBAUD) | |
1655 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1656 | /* Enable Interrupts */ |
63b91767 | 1657 | write_mos_reg(serial, port_number, IER, 0x0c); |
0f64478c GKH |
1658 | |
1659 | if (port->read_urb->status != -EINPROGRESS) { | |
0f64478c GKH |
1660 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1661 | if (status) | |
9eecf808 | 1662 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1663 | } |
0f64478c GKH |
1664 | } |
1665 | ||
1666 | /* | |
1667 | * mos7720_set_termios | |
1668 | * this function is called by the tty driver when it wants to change the | |
1669 | * termios structure. | |
1670 | */ | |
95da310e AC |
1671 | static void mos7720_set_termios(struct tty_struct *tty, |
1672 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1673 | { |
1674 | int status; | |
1675 | unsigned int cflag; | |
1676 | struct usb_serial *serial; | |
1677 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1678 | |
1679 | serial = port->serial; | |
1680 | ||
1681 | mos7720_port = usb_get_serial_port_data(port); | |
1682 | ||
1683 | if (mos7720_port == NULL) | |
1684 | return; | |
1685 | ||
0f64478c | 1686 | if (!mos7720_port->open) { |
9eecf808 | 1687 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1688 | return; |
1689 | } | |
1690 | ||
9eecf808 | 1691 | dev_dbg(&port->dev, "setting termios - ASPIRE\n"); |
0f64478c | 1692 | |
adc8d746 | 1693 | cflag = tty->termios.c_cflag; |
0f64478c | 1694 | |
9eecf808 | 1695 | dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__, |
d9a80746 | 1696 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
0f64478c | 1697 | |
9eecf808 GKH |
1698 | dev_dbg(&port->dev, "%s - old cflag %08x old iflag %08x\n", __func__, |
1699 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1700 | |
1701 | /* change the port settings to the new ones specified */ | |
95da310e | 1702 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1703 | |
4da1a17d | 1704 | if (port->read_urb->status != -EINPROGRESS) { |
0f64478c GKH |
1705 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1706 | if (status) | |
9eecf808 | 1707 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1708 | } |
0f64478c GKH |
1709 | } |
1710 | ||
1711 | /* | |
1712 | * get_lsr_info - get line status register info | |
1713 | * | |
1714 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1715 | * is emptied. On bus types like RS485, the transmitter must | |
1716 | * release the bus after transmitting. This must be done when | |
1717 | * the transmit shift register is empty, not be done when the | |
1718 | * transmit holding register is empty. This functionality | |
1719 | * allows an RS485 driver to be written in user space. | |
1720 | */ | |
4da1a17d AC |
1721 | static int get_lsr_info(struct tty_struct *tty, |
1722 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1723 | { |
2f9ea55c | 1724 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1725 | unsigned int result = 0; |
2f9ea55c | 1726 | unsigned char data = 0; |
1143832e | 1727 | int port_number = port->port_number; |
2f9ea55c | 1728 | int count; |
0f64478c | 1729 | |
95da310e | 1730 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1731 | if (count == 0) { |
63b91767 | 1732 | read_mos_reg(port->serial, port_number, LSR, &data); |
2f9ea55c KS |
1733 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1734 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1735 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1736 | result = TIOCSER_TEMT; |
1737 | } | |
0f64478c | 1738 | } |
0f64478c GKH |
1739 | if (copy_to_user(value, &result, sizeof(int))) |
1740 | return -EFAULT; | |
1741 | return 0; | |
1742 | } | |
1743 | ||
60b33c13 | 1744 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1745 | { |
1746 | struct usb_serial_port *port = tty->driver_data; | |
1747 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1748 | unsigned int result = 0; | |
1749 | unsigned int mcr ; | |
1750 | unsigned int msr ; | |
1751 | ||
0f608f89 KS |
1752 | mcr = mos7720_port->shadowMCR; |
1753 | msr = mos7720_port->shadowMSR; | |
1754 | ||
1755 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1756 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1757 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1758 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1759 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1760 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1761 | ||
0f608f89 KS |
1762 | return result; |
1763 | } | |
1764 | ||
20b9d177 | 1765 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1766 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1767 | { |
1768 | struct usb_serial_port *port = tty->driver_data; | |
1769 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1770 | unsigned int mcr ; | |
0f608f89 KS |
1771 | |
1772 | mcr = mos7720_port->shadowMCR; | |
1773 | ||
1774 | if (set & TIOCM_RTS) | |
1775 | mcr |= UART_MCR_RTS; | |
1776 | if (set & TIOCM_DTR) | |
1777 | mcr |= UART_MCR_DTR; | |
1778 | if (set & TIOCM_LOOP) | |
1779 | mcr |= UART_MCR_LOOP; | |
1780 | ||
1781 | if (clear & TIOCM_RTS) | |
1782 | mcr &= ~UART_MCR_RTS; | |
1783 | if (clear & TIOCM_DTR) | |
1784 | mcr &= ~UART_MCR_DTR; | |
1785 | if (clear & TIOCM_LOOP) | |
1786 | mcr &= ~UART_MCR_LOOP; | |
1787 | ||
1788 | mos7720_port->shadowMCR = mcr; | |
1143832e GKH |
1789 | write_mos_reg(port->serial, port->port_number, MCR, |
1790 | mos7720_port->shadowMCR); | |
0f608f89 KS |
1791 | |
1792 | return 0; | |
1793 | } | |
1794 | ||
0f64478c GKH |
1795 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1796 | unsigned int __user *value) | |
1797 | { | |
0bca1b91 | 1798 | unsigned int mcr; |
0f64478c | 1799 | unsigned int arg; |
0f64478c GKH |
1800 | |
1801 | struct usb_serial_port *port; | |
1802 | ||
1803 | if (mos7720_port == NULL) | |
1804 | return -1; | |
1805 | ||
4da1a17d | 1806 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1807 | mcr = mos7720_port->shadowMCR; |
1808 | ||
1809 | if (copy_from_user(&arg, value, sizeof(int))) | |
1810 | return -EFAULT; | |
1811 | ||
1812 | switch (cmd) { | |
1813 | case TIOCMBIS: | |
1814 | if (arg & TIOCM_RTS) | |
1815 | mcr |= UART_MCR_RTS; | |
1816 | if (arg & TIOCM_DTR) | |
1817 | mcr |= UART_MCR_RTS; | |
1818 | if (arg & TIOCM_LOOP) | |
1819 | mcr |= UART_MCR_LOOP; | |
1820 | break; | |
1821 | ||
1822 | case TIOCMBIC: | |
1823 | if (arg & TIOCM_RTS) | |
1824 | mcr &= ~UART_MCR_RTS; | |
1825 | if (arg & TIOCM_DTR) | |
1826 | mcr &= ~UART_MCR_RTS; | |
1827 | if (arg & TIOCM_LOOP) | |
1828 | mcr &= ~UART_MCR_LOOP; | |
1829 | break; | |
1830 | ||
0f64478c GKH |
1831 | } |
1832 | ||
1833 | mos7720_port->shadowMCR = mcr; | |
1143832e GKH |
1834 | write_mos_reg(port->serial, port->port_number, MCR, |
1835 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1836 | |
1837 | return 0; | |
1838 | } | |
1839 | ||
0f64478c GKH |
1840 | static int get_serial_info(struct moschip_port *mos7720_port, |
1841 | struct serial_struct __user *retinfo) | |
1842 | { | |
1843 | struct serial_struct tmp; | |
1844 | ||
1845 | if (!retinfo) | |
1846 | return -EFAULT; | |
1847 | ||
1848 | memset(&tmp, 0, sizeof(tmp)); | |
1849 | ||
1850 | tmp.type = PORT_16550A; | |
e5b1e206 | 1851 | tmp.line = mos7720_port->port->minor; |
1143832e | 1852 | tmp.port = mos7720_port->port->port_number; |
0f64478c GKH |
1853 | tmp.irq = 0; |
1854 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1855 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1856 | tmp.baud_base = 9600; |
1857 | tmp.close_delay = 5*HZ; | |
1858 | tmp.closing_wait = 30*HZ; | |
1859 | ||
1860 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1861 | return -EFAULT; | |
1862 | return 0; | |
1863 | } | |
1864 | ||
00a0d0d6 | 1865 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1866 | unsigned int cmd, unsigned long arg) |
1867 | { | |
95da310e | 1868 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1869 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1870 | |
1871 | mos7720_port = usb_get_serial_port_data(port); | |
1872 | if (mos7720_port == NULL) | |
1873 | return -ENODEV; | |
1874 | ||
0f64478c | 1875 | switch (cmd) { |
0f64478c | 1876 | case TIOCSERGETLSR: |
9eecf808 | 1877 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1878 | return get_lsr_info(tty, mos7720_port, |
1879 | (unsigned int __user *)arg); | |
0f64478c | 1880 | |
95da310e | 1881 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1882 | case TIOCMBIS: |
1883 | case TIOCMBIC: | |
9eecf808 | 1884 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1885 | return set_modem_info(mos7720_port, cmd, |
1886 | (unsigned int __user *)arg); | |
1887 | ||
0f64478c | 1888 | case TIOCGSERIAL: |
9eecf808 | 1889 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1890 | return get_serial_info(mos7720_port, |
1891 | (struct serial_struct __user *)arg); | |
0f64478c GKH |
1892 | } |
1893 | ||
1894 | return -ENOIOCTLCMD; | |
1895 | } | |
1896 | ||
1897 | static int mos7720_startup(struct usb_serial *serial) | |
1898 | { | |
0f64478c | 1899 | struct usb_device *dev; |
0f64478c | 1900 | char data; |
91f58ae6 | 1901 | u16 product; |
b69578df | 1902 | int ret_val; |
0f64478c | 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; | |
1928 | } | |
1929 | ||
0f64478c GKH |
1930 | /* setting configuration feature to one */ |
1931 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
849513a7 | 1932 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
0f64478c | 1933 | |
b69578df MD |
1934 | /* start the interrupt urb */ |
1935 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
1936 | if (ret_val) | |
1937 | dev_err(&dev->dev, | |
1938 | "%s - Error %d submitting control urb\n", | |
1939 | __func__, ret_val); | |
1940 | ||
1941 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
1942 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1943 | ret_val = mos7715_parport_init(serial); | |
1944 | if (ret_val < 0) | |
1945 | return ret_val; | |
1946 | } | |
1947 | #endif | |
4da1a17d | 1948 | /* LSR For Port 1 */ |
63b91767 | 1949 | read_mos_reg(serial, 0, LSR, &data); |
9eecf808 | 1950 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
1951 | |
1952 | return 0; | |
1953 | } | |
1954 | ||
f9c99bb8 | 1955 | static void mos7720_release(struct usb_serial *serial) |
0f64478c | 1956 | { |
b69578df MD |
1957 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1958 | /* close the parallel port */ | |
1959 | ||
1960 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
1961 | == MOSCHIP_DEVICE_ID_7715) { | |
1962 | struct urbtracker *urbtrack; | |
1963 | unsigned long flags; | |
1964 | struct mos7715_parport *mos_parport = | |
1965 | usb_get_serial_data(serial); | |
1966 | ||
1967 | /* prevent NULL ptr dereference in port callbacks */ | |
1968 | spin_lock(&release_lock); | |
1969 | mos_parport->pp->private_data = NULL; | |
1970 | spin_unlock(&release_lock); | |
1971 | ||
1972 | /* wait for synchronous usb calls to return */ | |
1973 | if (mos_parport->msg_pending) | |
1974 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
849513a7 | 1975 | msecs_to_jiffies(MOS_WDR_TIMEOUT)); |
b69578df MD |
1976 | |
1977 | parport_remove_port(mos_parport->pp); | |
1978 | usb_set_serial_data(serial, NULL); | |
1979 | mos_parport->serial = NULL; | |
1980 | ||
1981 | /* if tasklet currently scheduled, wait for it to complete */ | |
1982 | tasklet_kill(&mos_parport->urb_tasklet); | |
1983 | ||
1984 | /* unlink any urbs sent by the tasklet */ | |
1985 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
1986 | list_for_each_entry(urbtrack, | |
1987 | &mos_parport->active_urbs, | |
1988 | urblist_entry) | |
1989 | usb_unlink_urb(urbtrack->urb); | |
1990 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
1991 | ||
1992 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
1993 | } | |
1994 | #endif | |
4230af57 JH |
1995 | } |
1996 | ||
1997 | static int mos7720_port_probe(struct usb_serial_port *port) | |
1998 | { | |
1999 | struct moschip_port *mos7720_port; | |
2000 | ||
2001 | mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); | |
2002 | if (!mos7720_port) | |
2003 | return -ENOMEM; | |
2004 | ||
2005 | /* Initialize all port interrupt end point to port 0 int endpoint. | |
2006 | * Our device has only one interrupt endpoint common to all ports. | |
2007 | */ | |
2008 | port->interrupt_in_endpointAddress = | |
2009 | port->serial->port[0]->interrupt_in_endpointAddress; | |
2010 | mos7720_port->port = port; | |
2011 | ||
2012 | usb_set_serial_port_data(port, mos7720_port); | |
2013 | ||
2014 | return 0; | |
2015 | } | |
2016 | ||
2017 | static int mos7720_port_remove(struct usb_serial_port *port) | |
2018 | { | |
2019 | struct moschip_port *mos7720_port; | |
2020 | ||
2021 | mos7720_port = usb_get_serial_port_data(port); | |
2022 | kfree(mos7720_port); | |
2023 | ||
2024 | return 0; | |
0f64478c GKH |
2025 | } |
2026 | ||
2027 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2028 | .driver = { | |
2029 | .owner = THIS_MODULE, | |
2030 | .name = "moschip7720", | |
2031 | }, | |
2032 | .description = "Moschip 2 port adapter", | |
68e24113 | 2033 | .id_table = id_table, |
fb088e33 | 2034 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2035 | .open = mos7720_open, |
2036 | .close = mos7720_close, | |
2037 | .throttle = mos7720_throttle, | |
2038 | .unthrottle = mos7720_unthrottle, | |
fb088e33 | 2039 | .probe = mos77xx_probe, |
0f64478c | 2040 | .attach = mos7720_startup, |
f9c99bb8 | 2041 | .release = mos7720_release, |
4230af57 JH |
2042 | .port_probe = mos7720_port_probe, |
2043 | .port_remove = mos7720_port_remove, | |
0f64478c | 2044 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2045 | .tiocmget = mos7720_tiocmget, |
2046 | .tiocmset = mos7720_tiocmset, | |
0f64478c GKH |
2047 | .set_termios = mos7720_set_termios, |
2048 | .write = mos7720_write, | |
2049 | .write_room = mos7720_write_room, | |
2050 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2051 | .break_ctl = mos7720_break, | |
2052 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fb088e33 | 2053 | .read_int_callback = NULL /* dynamically assigned in probe() */ |
0f64478c GKH |
2054 | }; |
2055 | ||
4d2a7aff AS |
2056 | static struct usb_serial_driver * const serial_drivers[] = { |
2057 | &moschip7720_2port_driver, NULL | |
2058 | }; | |
2059 | ||
68e24113 | 2060 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2061 | |
4da1a17d AC |
2062 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2063 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c | 2064 | MODULE_LICENSE("GPL"); |