Commit | Line | Data |
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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 | ||
0f64478c GKH |
68 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
69 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
70 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
71 | ||
68e24113 | 72 | static const struct usb_device_id id_table[] = { |
4da1a17d | 73 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
fb088e33 | 74 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
0f64478c GKH |
75 | { } /* terminating entry */ |
76 | }; | |
68e24113 | 77 | MODULE_DEVICE_TABLE(usb, id_table); |
0f64478c | 78 | |
b69578df MD |
79 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
80 | ||
81 | /* initial values for parport regs */ | |
82 | #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ | |
83 | #define ECR_INIT_VAL 0x00 /* SPP mode */ | |
84 | ||
85 | struct urbtracker { | |
86 | struct mos7715_parport *mos_parport; | |
87 | struct list_head urblist_entry; | |
88 | struct kref ref_count; | |
89 | struct urb *urb; | |
ef6c8c1d | 90 | struct usb_ctrlrequest *setup; |
b69578df MD |
91 | }; |
92 | ||
93 | enum mos7715_pp_modes { | |
94 | SPP = 0<<5, | |
95 | PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ | |
96 | PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ | |
97 | }; | |
98 | ||
99 | struct mos7715_parport { | |
100 | struct parport *pp; /* back to containing struct */ | |
101 | struct kref ref_count; /* to instance of this struct */ | |
102 | struct list_head deferred_urbs; /* list deferred async urbs */ | |
103 | struct list_head active_urbs; /* list async urbs in flight */ | |
104 | spinlock_t listlock; /* protects list access */ | |
105 | bool msg_pending; /* usb sync call pending */ | |
106 | struct completion syncmsg_compl; /* usb sync call completed */ | |
107 | struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ | |
108 | struct usb_serial *serial; /* back to containing struct */ | |
109 | __u8 shadowECR; /* parallel port regs... */ | |
110 | __u8 shadowDCR; | |
111 | atomic_t shadowDSR; /* updated in int-in callback */ | |
112 | }; | |
113 | ||
114 | /* lock guards against dereferencing NULL ptr in parport ops callbacks */ | |
115 | static DEFINE_SPINLOCK(release_lock); | |
116 | ||
63b91767 MD |
117 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
118 | ||
119 | static const unsigned int dummy; /* for clarity in register access fns */ | |
120 | ||
b69578df | 121 | enum mos_regs { |
ee5729ec SM |
122 | MOS7720_THR, /* serial port regs */ |
123 | MOS7720_RHR, | |
124 | MOS7720_IER, | |
125 | MOS7720_FCR, | |
126 | MOS7720_ISR, | |
127 | MOS7720_LCR, | |
128 | MOS7720_MCR, | |
129 | MOS7720_LSR, | |
130 | MOS7720_MSR, | |
131 | MOS7720_SPR, | |
132 | MOS7720_DLL, | |
133 | MOS7720_DLM, | |
134 | MOS7720_DPR, /* parallel port regs */ | |
135 | MOS7720_DSR, | |
136 | MOS7720_DCR, | |
137 | MOS7720_ECR, | |
138 | MOS7720_SP1_REG, /* device control regs */ | |
139 | MOS7720_SP2_REG, /* serial port 2 (7720 only) */ | |
140 | MOS7720_PP_REG, | |
141 | MOS7720_SP_CONTROL_REG, | |
b69578df MD |
142 | }; |
143 | ||
144 | /* | |
145 | * Return the correct value for the Windex field of the setup packet | |
146 | * for a control endpoint message. See the 7715 datasheet. | |
147 | */ | |
148 | static inline __u16 get_reg_index(enum mos_regs reg) | |
149 | { | |
150 | static const __u16 mos7715_index_lookup_table[] = { | |
ee5729ec SM |
151 | 0x00, /* MOS7720_THR */ |
152 | 0x00, /* MOS7720_RHR */ | |
153 | 0x01, /* MOS7720_IER */ | |
154 | 0x02, /* MOS7720_FCR */ | |
155 | 0x02, /* MOS7720_ISR */ | |
156 | 0x03, /* MOS7720_LCR */ | |
157 | 0x04, /* MOS7720_MCR */ | |
158 | 0x05, /* MOS7720_LSR */ | |
159 | 0x06, /* MOS7720_MSR */ | |
160 | 0x07, /* MOS7720_SPR */ | |
161 | 0x00, /* MOS7720_DLL */ | |
162 | 0x01, /* MOS7720_DLM */ | |
163 | 0x00, /* MOS7720_DPR */ | |
164 | 0x01, /* MOS7720_DSR */ | |
165 | 0x02, /* MOS7720_DCR */ | |
166 | 0x0a, /* MOS7720_ECR */ | |
167 | 0x01, /* MOS7720_SP1_REG */ | |
168 | 0x02, /* MOS7720_SP2_REG (7720 only) */ | |
169 | 0x04, /* MOS7720_PP_REG (7715 only) */ | |
170 | 0x08, /* MOS7720_SP_CONTROL_REG */ | |
b69578df MD |
171 | }; |
172 | return mos7715_index_lookup_table[reg]; | |
173 | } | |
174 | ||
175 | /* | |
176 | * Return the correct value for the upper byte of the Wvalue field of | |
177 | * the setup packet for a control endpoint message. | |
178 | */ | |
63b91767 MD |
179 | static inline __u16 get_reg_value(enum mos_regs reg, |
180 | unsigned int serial_portnum) | |
b69578df | 181 | { |
ee5729ec | 182 | if (reg >= MOS7720_SP1_REG) /* control reg */ |
b69578df | 183 | return 0x0000; |
63b91767 | 184 | |
ee5729ec | 185 | else if (reg >= MOS7720_DPR) /* parallel port reg (7715 only) */ |
b69578df | 186 | return 0x0100; |
63b91767 MD |
187 | |
188 | else /* serial port reg */ | |
189 | return (serial_portnum + 2) << 8; | |
b69578df MD |
190 | } |
191 | ||
192 | /* | |
193 | * Write data byte to the specified device register. The data is embedded in | |
63b91767 MD |
194 | * the value field of the setup packet. serial_portnum is ignored for registers |
195 | * not specific to a particular serial port. | |
b69578df | 196 | */ |
63b91767 MD |
197 | static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
198 | enum mos_regs reg, __u8 data) | |
b69578df | 199 | { |
b69578df MD |
200 | struct usb_device *usbdev = serial->dev; |
201 | unsigned int pipe = usb_sndctrlpipe(usbdev, 0); | |
202 | __u8 request = (__u8)0x0e; | |
203 | __u8 requesttype = (__u8)0x40; | |
b69578df | 204 | __u16 index = get_reg_index(reg); |
63b91767 MD |
205 | __u16 value = get_reg_value(reg, serial_portnum) + data; |
206 | int status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
207 | index, NULL, 0, MOS_WDR_TIMEOUT); | |
b69578df MD |
208 | if (status < 0) |
209 | dev_err(&usbdev->dev, | |
d9a38a87 | 210 | "mos7720: usb_control_msg() failed: %d\n", status); |
b69578df MD |
211 | return status; |
212 | } | |
213 | ||
214 | /* | |
215 | * Read data byte from the specified device register. The data returned by the | |
63b91767 MD |
216 | * device is embedded in the value field of the setup packet. serial_portnum is |
217 | * ignored for registers that are not specific to a particular serial port. | |
b69578df | 218 | */ |
63b91767 MD |
219 | static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
220 | enum mos_regs reg, __u8 *data) | |
b69578df | 221 | { |
63b91767 | 222 | struct usb_device *usbdev = serial->dev; |
b69578df MD |
223 | unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
224 | __u8 request = (__u8)0x0d; | |
225 | __u8 requesttype = (__u8)0xc0; | |
b69578df | 226 | __u16 index = get_reg_index(reg); |
63b91767 | 227 | __u16 value = get_reg_value(reg, serial_portnum); |
72ea18a5 JH |
228 | u8 *buf; |
229 | int status; | |
230 | ||
231 | buf = kmalloc(1, GFP_KERNEL); | |
232 | if (!buf) | |
233 | return -ENOMEM; | |
234 | ||
235 | status = usb_control_msg(usbdev, pipe, request, requesttype, value, | |
236 | index, buf, 1, MOS_WDR_TIMEOUT); | |
0d130367 | 237 | if (status == 1) { |
72ea18a5 | 238 | *data = *buf; |
0d130367 | 239 | } else { |
b69578df | 240 | dev_err(&usbdev->dev, |
d9a38a87 | 241 | "mos7720: usb_control_msg() failed: %d\n", status); |
0d130367 JH |
242 | if (status >= 0) |
243 | status = -EIO; | |
244 | *data = 0; | |
245 | } | |
246 | ||
72ea18a5 JH |
247 | kfree(buf); |
248 | ||
b69578df MD |
249 | return status; |
250 | } | |
251 | ||
63b91767 MD |
252 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
253 | ||
b69578df MD |
254 | static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
255 | enum mos7715_pp_modes mode) | |
256 | { | |
257 | mos_parport->shadowECR = mode; | |
ee5729ec SM |
258 | write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, |
259 | mos_parport->shadowECR); | |
b69578df MD |
260 | return 0; |
261 | } | |
262 | ||
263 | static void destroy_mos_parport(struct kref *kref) | |
264 | { | |
265 | struct mos7715_parport *mos_parport = | |
266 | container_of(kref, struct mos7715_parport, ref_count); | |
267 | ||
b69578df MD |
268 | kfree(mos_parport); |
269 | } | |
270 | ||
271 | static void destroy_urbtracker(struct kref *kref) | |
272 | { | |
273 | struct urbtracker *urbtrack = | |
274 | container_of(kref, struct urbtracker, ref_count); | |
275 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 276 | |
b69578df | 277 | usb_free_urb(urbtrack->urb); |
ef6c8c1d | 278 | kfree(urbtrack->setup); |
b69578df MD |
279 | kfree(urbtrack); |
280 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
281 | } | |
282 | ||
283 | /* | |
284 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
285 | * port callback had to be deferred because the disconnect mutex could not be | |
286 | * obtained at the time. | |
287 | */ | |
288 | static void send_deferred_urbs(unsigned long _mos_parport) | |
289 | { | |
290 | int ret_val; | |
291 | unsigned long flags; | |
292 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 293 | struct urbtracker *urbtrack, *tmp; |
b69578df | 294 | struct list_head *cursor, *next; |
9eecf808 | 295 | struct device *dev; |
b69578df | 296 | |
b69578df MD |
297 | /* if release function ran, game over */ |
298 | if (unlikely(mos_parport->serial == NULL)) | |
299 | return; | |
300 | ||
9eecf808 GKH |
301 | dev = &mos_parport->serial->dev->dev; |
302 | ||
b69578df MD |
303 | /* try again to get the mutex */ |
304 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 305 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
306 | tasklet_schedule(&mos_parport->urb_tasklet); |
307 | return; | |
308 | } | |
309 | ||
310 | /* if device disconnected, game over */ | |
311 | if (unlikely(mos_parport->serial->disconnected)) { | |
312 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
313 | return; | |
314 | } | |
315 | ||
316 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
317 | if (list_empty(&mos_parport->deferred_urbs)) { | |
318 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
319 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 320 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
321 | return; |
322 | } | |
323 | ||
324 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
325 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
326 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 327 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
328 | urblist_entry) { |
329 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 330 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 331 | if (ret_val) { |
9eecf808 | 332 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
333 | list_del(&urbtrack->urblist_entry); |
334 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
335 | } | |
336 | } | |
337 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
338 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
339 | } | |
340 | ||
341 | /* callback for parallel port control urbs submitted asynchronously */ | |
342 | static void async_complete(struct urb *urb) | |
343 | { | |
344 | struct urbtracker *urbtrack = urb->context; | |
345 | int status = urb->status; | |
ca09907d | 346 | |
b69578df | 347 | if (unlikely(status)) |
9eecf808 | 348 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
349 | |
350 | /* remove the urbtracker from the active_urbs list */ | |
351 | spin_lock(&urbtrack->mos_parport->listlock); | |
352 | list_del(&urbtrack->urblist_entry); | |
353 | spin_unlock(&urbtrack->mos_parport->listlock); | |
354 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
355 | } | |
356 | ||
357 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
358 | enum mos_regs reg, __u8 data) | |
359 | { | |
360 | struct urbtracker *urbtrack; | |
361 | int ret_val; | |
362 | unsigned long flags; | |
b69578df MD |
363 | struct usb_serial *serial = mos_parport->serial; |
364 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
365 | |
366 | /* create and initialize the control urb and containing urbtracker */ | |
367 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
10c642d0 | 368 | if (!urbtrack) |
b69578df | 369 | return -ENOMEM; |
10c642d0 | 370 | |
b69578df MD |
371 | kref_get(&mos_parport->ref_count); |
372 | urbtrack->mos_parport = mos_parport; | |
373 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
10c642d0 | 374 | if (!urbtrack->urb) { |
b69578df MD |
375 | kfree(urbtrack); |
376 | return -ENOMEM; | |
377 | } | |
d0bd9a41 | 378 | urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); |
ef6c8c1d JH |
379 | if (!urbtrack->setup) { |
380 | usb_free_urb(urbtrack->urb); | |
381 | kfree(urbtrack); | |
382 | return -ENOMEM; | |
383 | } | |
384 | urbtrack->setup->bRequestType = (__u8)0x40; | |
385 | urbtrack->setup->bRequest = (__u8)0x0e; | |
3b716caf JH |
386 | urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); |
387 | urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); | |
ef6c8c1d | 388 | urbtrack->setup->wLength = 0; |
b69578df MD |
389 | usb_fill_control_urb(urbtrack->urb, usbdev, |
390 | usb_sndctrlpipe(usbdev, 0), | |
ef6c8c1d | 391 | (unsigned char *)urbtrack->setup, |
b69578df MD |
392 | NULL, 0, async_complete, urbtrack); |
393 | kref_init(&urbtrack->ref_count); | |
394 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
395 | ||
396 | /* | |
397 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
398 | * and schedule a tasklet to try again later | |
399 | */ | |
400 | if (!mutex_trylock(&serial->disc_mutex)) { | |
401 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
402 | list_add_tail(&urbtrack->urblist_entry, | |
403 | &mos_parport->deferred_urbs); | |
404 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
405 | tasklet_schedule(&mos_parport->urb_tasklet); | |
d9a38a87 | 406 | dev_dbg(&usbdev->dev, "tasklet scheduled\n"); |
b69578df MD |
407 | return 0; |
408 | } | |
409 | ||
410 | /* bail if device disconnected */ | |
411 | if (serial->disconnected) { | |
412 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
413 | mutex_unlock(&serial->disc_mutex); | |
414 | return -ENODEV; | |
415 | } | |
416 | ||
417 | /* add the tracker to the active_urbs list and submit */ | |
418 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
419 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
420 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
421 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
422 | mutex_unlock(&serial->disc_mutex); | |
423 | if (ret_val) { | |
424 | dev_err(&usbdev->dev, | |
d9a38a87 | 425 | "%s: submit_urb() failed: %d\n", __func__, ret_val); |
b69578df MD |
426 | spin_lock_irqsave(&mos_parport->listlock, flags); |
427 | list_del(&urbtrack->urblist_entry); | |
428 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
429 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
430 | return ret_val; | |
431 | } | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* | |
436 | * This is the the common top part of all parallel port callback operations that | |
437 | * send synchronous messages to the device. This implements convoluted locking | |
438 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
439 | * has called our release function, at which point struct mos7715_parport has | |
440 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
441 | * not called the release function yet because someone has a serial port open. | |
442 | * The shared release_lock prevents the first, and the mutex and disconnected | |
443 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
cd8c5053 | 444 | * flag to ensure that all synchronous usb message calls have completed before |
b69578df MD |
445 | * our release function can return. |
446 | */ | |
447 | static int parport_prologue(struct parport *pp) | |
448 | { | |
449 | struct mos7715_parport *mos_parport; | |
450 | ||
451 | spin_lock(&release_lock); | |
452 | mos_parport = pp->private_data; | |
453 | if (unlikely(mos_parport == NULL)) { | |
454 | /* release fn called, port struct destroyed */ | |
455 | spin_unlock(&release_lock); | |
456 | return -1; | |
457 | } | |
458 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
16735d02 | 459 | reinit_completion(&mos_parport->syncmsg_compl); |
b69578df MD |
460 | spin_unlock(&release_lock); |
461 | ||
462 | mutex_lock(&mos_parport->serial->disc_mutex); | |
463 | if (mos_parport->serial->disconnected) { | |
464 | /* device disconnected */ | |
465 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
466 | mos_parport->msg_pending = false; | |
467 | complete(&mos_parport->syncmsg_compl); | |
468 | return -1; | |
469 | } | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | /* | |
cd8c5053 | 475 | * This is the common bottom part of all parallel port functions that send |
b69578df MD |
476 | * synchronous messages to the device. |
477 | */ | |
478 | static inline void parport_epilogue(struct parport *pp) | |
479 | { | |
480 | struct mos7715_parport *mos_parport = pp->private_data; | |
481 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
482 | mos_parport->msg_pending = false; | |
483 | complete(&mos_parport->syncmsg_compl); | |
484 | } | |
485 | ||
486 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
487 | { | |
488 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 489 | |
b69578df MD |
490 | if (parport_prologue(pp) < 0) |
491 | return; | |
492 | mos7715_change_mode(mos_parport, SPP); | |
ee5729ec | 493 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, (__u8)d); |
b69578df MD |
494 | parport_epilogue(pp); |
495 | } | |
496 | ||
497 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
498 | { | |
499 | struct mos7715_parport *mos_parport = pp->private_data; | |
500 | unsigned char d; | |
ca09907d | 501 | |
b69578df MD |
502 | if (parport_prologue(pp) < 0) |
503 | return 0; | |
ee5729ec | 504 | read_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, &d); |
b69578df MD |
505 | parport_epilogue(pp); |
506 | return d; | |
507 | } | |
508 | ||
509 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
510 | { | |
511 | struct mos7715_parport *mos_parport = pp->private_data; | |
512 | __u8 data; | |
ca09907d | 513 | |
b69578df MD |
514 | if (parport_prologue(pp) < 0) |
515 | return; | |
516 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
ee5729ec | 517 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, data); |
b69578df MD |
518 | mos_parport->shadowDCR = data; |
519 | parport_epilogue(pp); | |
520 | } | |
521 | ||
522 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
523 | { | |
524 | struct mos7715_parport *mos_parport = pp->private_data; | |
525 | __u8 dcr; | |
ca09907d | 526 | |
b69578df MD |
527 | spin_lock(&release_lock); |
528 | mos_parport = pp->private_data; | |
529 | if (unlikely(mos_parport == NULL)) { | |
530 | spin_unlock(&release_lock); | |
531 | return 0; | |
532 | } | |
533 | dcr = mos_parport->shadowDCR & 0x0f; | |
534 | spin_unlock(&release_lock); | |
535 | return dcr; | |
536 | } | |
537 | ||
538 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
539 | unsigned char mask, | |
540 | unsigned char val) | |
541 | { | |
542 | struct mos7715_parport *mos_parport = pp->private_data; | |
543 | __u8 dcr; | |
ca09907d | 544 | |
b69578df MD |
545 | mask &= 0x0f; |
546 | val &= 0x0f; | |
547 | if (parport_prologue(pp) < 0) | |
548 | return 0; | |
549 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
ee5729ec SM |
550 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
551 | mos_parport->shadowDCR); | |
b69578df MD |
552 | dcr = mos_parport->shadowDCR & 0x0f; |
553 | parport_epilogue(pp); | |
554 | return dcr; | |
555 | } | |
556 | ||
557 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
558 | { | |
559 | unsigned char status; | |
560 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 561 | |
b69578df MD |
562 | spin_lock(&release_lock); |
563 | mos_parport = pp->private_data; | |
564 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
565 | spin_unlock(&release_lock); | |
566 | return 0; | |
567 | } | |
568 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
569 | spin_unlock(&release_lock); | |
570 | return status; | |
571 | } | |
572 | ||
573 | static void parport_mos7715_enable_irq(struct parport *pp) | |
574 | { | |
b69578df | 575 | } |
ca09907d | 576 | |
b69578df MD |
577 | static void parport_mos7715_disable_irq(struct parport *pp) |
578 | { | |
b69578df MD |
579 | } |
580 | ||
581 | static void parport_mos7715_data_forward(struct parport *pp) | |
582 | { | |
583 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 584 | |
b69578df MD |
585 | if (parport_prologue(pp) < 0) |
586 | return; | |
587 | mos7715_change_mode(mos_parport, PS2); | |
588 | mos_parport->shadowDCR &= ~0x20; | |
ee5729ec SM |
589 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
590 | mos_parport->shadowDCR); | |
b69578df MD |
591 | parport_epilogue(pp); |
592 | } | |
593 | ||
594 | static void parport_mos7715_data_reverse(struct parport *pp) | |
595 | { | |
596 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 597 | |
b69578df MD |
598 | if (parport_prologue(pp) < 0) |
599 | return; | |
600 | mos7715_change_mode(mos_parport, PS2); | |
601 | mos_parport->shadowDCR |= 0x20; | |
ee5729ec SM |
602 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
603 | mos_parport->shadowDCR); | |
b69578df MD |
604 | parport_epilogue(pp); |
605 | } | |
606 | ||
607 | static void parport_mos7715_init_state(struct pardevice *dev, | |
608 | struct parport_state *s) | |
609 | { | |
b69578df MD |
610 | s->u.pc.ctr = DCR_INIT_VAL; |
611 | s->u.pc.ecr = ECR_INIT_VAL; | |
612 | } | |
613 | ||
614 | /* N.B. Parport core code requires that this function not block */ | |
615 | static void parport_mos7715_save_state(struct parport *pp, | |
616 | struct parport_state *s) | |
617 | { | |
618 | struct mos7715_parport *mos_parport; | |
ca09907d | 619 | |
b69578df MD |
620 | spin_lock(&release_lock); |
621 | mos_parport = pp->private_data; | |
622 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
623 | spin_unlock(&release_lock); | |
624 | return; | |
625 | } | |
626 | s->u.pc.ctr = mos_parport->shadowDCR; | |
627 | s->u.pc.ecr = mos_parport->shadowECR; | |
628 | spin_unlock(&release_lock); | |
629 | } | |
630 | ||
631 | /* N.B. Parport core code requires that this function not block */ | |
632 | static void parport_mos7715_restore_state(struct parport *pp, | |
633 | struct parport_state *s) | |
634 | { | |
635 | struct mos7715_parport *mos_parport; | |
ca09907d | 636 | |
b69578df MD |
637 | spin_lock(&release_lock); |
638 | mos_parport = pp->private_data; | |
639 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
640 | spin_unlock(&release_lock); | |
641 | return; | |
642 | } | |
ee5729ec SM |
643 | write_parport_reg_nonblock(mos_parport, MOS7720_DCR, |
644 | mos_parport->shadowDCR); | |
645 | write_parport_reg_nonblock(mos_parport, MOS7720_ECR, | |
646 | mos_parport->shadowECR); | |
b69578df MD |
647 | spin_unlock(&release_lock); |
648 | } | |
649 | ||
650 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
651 | const void *buffer, | |
652 | size_t len, int flags) | |
653 | { | |
654 | int retval; | |
655 | struct mos7715_parport *mos_parport = pp->private_data; | |
656 | int actual_len; | |
ca09907d | 657 | |
b69578df MD |
658 | if (parport_prologue(pp) < 0) |
659 | return 0; | |
660 | mos7715_change_mode(mos_parport, PPF); | |
661 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
662 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
663 | (void *)buffer, len, &actual_len, | |
664 | MOS_WDR_TIMEOUT); | |
665 | parport_epilogue(pp); | |
666 | if (retval) { | |
667 | dev_err(&mos_parport->serial->dev->dev, | |
d9a38a87 | 668 | "mos7720: usb_bulk_msg() failed: %d\n", retval); |
b69578df MD |
669 | return 0; |
670 | } | |
671 | return actual_len; | |
672 | } | |
673 | ||
674 | static struct parport_operations parport_mos7715_ops = { | |
675 | .owner = THIS_MODULE, | |
676 | .write_data = parport_mos7715_write_data, | |
677 | .read_data = parport_mos7715_read_data, | |
678 | ||
679 | .write_control = parport_mos7715_write_control, | |
680 | .read_control = parport_mos7715_read_control, | |
681 | .frob_control = parport_mos7715_frob_control, | |
682 | ||
683 | .read_status = parport_mos7715_read_status, | |
684 | ||
685 | .enable_irq = parport_mos7715_enable_irq, | |
686 | .disable_irq = parport_mos7715_disable_irq, | |
687 | ||
688 | .data_forward = parport_mos7715_data_forward, | |
689 | .data_reverse = parport_mos7715_data_reverse, | |
690 | ||
691 | .init_state = parport_mos7715_init_state, | |
692 | .save_state = parport_mos7715_save_state, | |
693 | .restore_state = parport_mos7715_restore_state, | |
694 | ||
695 | .compat_write_data = parport_mos7715_write_compat, | |
696 | ||
697 | .nibble_read_data = parport_ieee1284_read_nibble, | |
698 | .byte_read_data = parport_ieee1284_read_byte, | |
699 | }; | |
700 | ||
701 | /* | |
702 | * Allocate and initialize parallel port control struct, initialize | |
703 | * the parallel port hardware device, and register with the parport subsystem. | |
704 | */ | |
705 | static int mos7715_parport_init(struct usb_serial *serial) | |
706 | { | |
707 | struct mos7715_parport *mos_parport; | |
708 | ||
709 | /* allocate and initialize parallel port control struct */ | |
710 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
10c642d0 | 711 | if (!mos_parport) |
b69578df | 712 | return -ENOMEM; |
10c642d0 | 713 | |
b69578df MD |
714 | mos_parport->msg_pending = false; |
715 | kref_init(&mos_parport->ref_count); | |
716 | spin_lock_init(&mos_parport->listlock); | |
717 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
718 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
719 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
720 | mos_parport->serial = serial; | |
721 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
722 | (unsigned long) mos_parport); | |
723 | init_completion(&mos_parport->syncmsg_compl); | |
724 | ||
725 | /* cycle parallel port reset bit */ | |
ee5729ec SM |
726 | write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x80); |
727 | write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x00); | |
b69578df MD |
728 | |
729 | /* initialize device registers */ | |
730 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
ee5729ec SM |
731 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
732 | mos_parport->shadowDCR); | |
b69578df | 733 | mos_parport->shadowECR = ECR_INIT_VAL; |
ee5729ec SM |
734 | write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, |
735 | mos_parport->shadowECR); | |
b69578df MD |
736 | |
737 | /* register with parport core */ | |
738 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
739 | PARPORT_DMA_NONE, | |
740 | &parport_mos7715_ops); | |
741 | if (mos_parport->pp == NULL) { | |
742 | dev_err(&serial->interface->dev, | |
743 | "Could not register parport\n"); | |
744 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
745 | return -EIO; | |
746 | } | |
747 | mos_parport->pp->private_data = mos_parport; | |
748 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
749 | mos_parport->pp->dev = &serial->interface->dev; | |
750 | parport_announce_port(mos_parport->pp); | |
751 | ||
752 | return 0; | |
753 | } | |
754 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
755 | |
756 | /* | |
757 | * mos7720_interrupt_callback | |
758 | * this is the callback function for when we have received data on the | |
759 | * interrupt endpoint. | |
760 | */ | |
761 | static void mos7720_interrupt_callback(struct urb *urb) | |
762 | { | |
763 | int result; | |
764 | int length; | |
81105984 | 765 | int status = urb->status; |
9eecf808 | 766 | struct device *dev = &urb->dev->dev; |
325b70c2 | 767 | __u8 *data; |
0f64478c GKH |
768 | __u8 sp1; |
769 | __u8 sp2; | |
0f64478c | 770 | |
81105984 | 771 | switch (status) { |
0f64478c GKH |
772 | case 0: |
773 | /* success */ | |
774 | break; | |
775 | case -ECONNRESET: | |
776 | case -ENOENT: | |
777 | case -ESHUTDOWN: | |
778 | /* this urb is terminated, clean up */ | |
9eecf808 | 779 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
780 | return; |
781 | default: | |
9eecf808 | 782 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
783 | goto exit; |
784 | } | |
785 | ||
786 | length = urb->actual_length; | |
787 | data = urb->transfer_buffer; | |
788 | ||
789 | /* Moschip get 4 bytes | |
790 | * Byte 1 IIR Port 1 (port.number is 0) | |
791 | * Byte 2 IIR Port 2 (port.number is 1) | |
792 | * Byte 3 -------------- | |
793 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
794 | |
795 | /* the above description is inverted | |
796 | * oneukum 2007-03-14 */ | |
797 | ||
798 | if (unlikely(length != 4)) { | |
9eecf808 | 799 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
800 | return; |
801 | } | |
802 | ||
325b70c2 ON |
803 | sp1 = data[3]; |
804 | sp2 = data[2]; | |
0f64478c | 805 | |
325b70c2 | 806 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 807 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 808 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
809 | } else { |
810 | switch (sp1 & 0x0f) { | |
811 | case SERIAL_IIR_RLS: | |
9eecf808 | 812 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
813 | break; |
814 | case SERIAL_IIR_CTI: | |
9eecf808 | 815 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
816 | break; |
817 | case SERIAL_IIR_MS: | |
9eecf808 | 818 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
819 | break; |
820 | } | |
821 | ||
822 | switch (sp2 & 0x0f) { | |
823 | case SERIAL_IIR_RLS: | |
9eecf808 | 824 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
825 | break; |
826 | case SERIAL_IIR_CTI: | |
9eecf808 | 827 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
828 | break; |
829 | case SERIAL_IIR_MS: | |
9eecf808 | 830 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
831 | break; |
832 | } | |
833 | } | |
834 | ||
835 | exit: | |
836 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
837 | if (result) | |
9eecf808 | 838 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
0f64478c GKH |
839 | } |
840 | ||
fb088e33 MD |
841 | /* |
842 | * mos7715_interrupt_callback | |
843 | * this is the 7715's callback function for when we have received data on | |
844 | * the interrupt endpoint. | |
845 | */ | |
846 | static void mos7715_interrupt_callback(struct urb *urb) | |
847 | { | |
848 | int result; | |
849 | int length; | |
850 | int status = urb->status; | |
9eecf808 | 851 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
852 | __u8 *data; |
853 | __u8 iir; | |
854 | ||
855 | switch (status) { | |
856 | case 0: | |
857 | /* success */ | |
858 | break; | |
859 | case -ECONNRESET: | |
860 | case -ENOENT: | |
861 | case -ESHUTDOWN: | |
b69578df | 862 | case -ENODEV: |
fb088e33 | 863 | /* this urb is terminated, clean up */ |
9eecf808 | 864 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
865 | return; |
866 | default: | |
9eecf808 | 867 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
868 | goto exit; |
869 | } | |
870 | ||
871 | length = urb->actual_length; | |
872 | data = urb->transfer_buffer; | |
873 | ||
874 | /* Structure of data from 7715 device: | |
875 | * Byte 1: IIR serial Port | |
876 | * Byte 2: unused | |
877 | * Byte 2: DSR parallel port | |
878 | * Byte 4: FIFO status for both */ | |
879 | ||
880 | if (unlikely(length != 4)) { | |
9eecf808 | 881 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
882 | return; |
883 | } | |
884 | ||
885 | iir = data[0]; | |
886 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
887 | switch (iir & 0x0f) { | |
888 | case SERIAL_IIR_RLS: | |
d9a38a87 | 889 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n"); |
fb088e33 MD |
890 | break; |
891 | case SERIAL_IIR_CTI: | |
9eecf808 | 892 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
893 | break; |
894 | case SERIAL_IIR_MS: | |
9eecf808 | 895 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
896 | break; |
897 | } | |
898 | } | |
899 | ||
b69578df MD |
900 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
901 | { /* update local copy of DSR reg */ | |
902 | struct usb_serial_port *port = urb->context; | |
903 | struct mos7715_parport *mos_parport = port->serial->private; | |
904 | if (unlikely(mos_parport == NULL)) | |
905 | return; | |
906 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
907 | } | |
908 | #endif | |
909 | ||
fb088e33 MD |
910 | exit: |
911 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
912 | if (result) | |
9eecf808 | 913 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
914 | } |
915 | ||
0f64478c GKH |
916 | /* |
917 | * mos7720_bulk_in_callback | |
918 | * this is the callback function for when we have received data on the | |
919 | * bulk in endpoint. | |
920 | */ | |
921 | static void mos7720_bulk_in_callback(struct urb *urb) | |
922 | { | |
81105984 | 923 | int retval; |
0f64478c GKH |
924 | unsigned char *data ; |
925 | struct usb_serial_port *port; | |
81105984 | 926 | int status = urb->status; |
0f64478c | 927 | |
81105984 | 928 | if (status) { |
9eecf808 | 929 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
930 | return; |
931 | } | |
932 | ||
b69578df | 933 | port = urb->context; |
0f64478c | 934 | |
9eecf808 | 935 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
936 | |
937 | data = urb->transfer_buffer; | |
938 | ||
2e124b4a | 939 | if (urb->actual_length) { |
05c7cd39 | 940 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 941 | tty_flip_buffer_push(&port->port); |
0f64478c GKH |
942 | } |
943 | ||
0f64478c | 944 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
945 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
946 | if (retval) | |
9eecf808 | 947 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
948 | } |
949 | } | |
950 | ||
951 | /* | |
952 | * mos7720_bulk_out_data_callback | |
953 | * this is the callback function for when we have finished sending serial | |
954 | * data on the bulk out endpoint. | |
955 | */ | |
956 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
957 | { | |
958 | struct moschip_port *mos7720_port; | |
81105984 | 959 | int status = urb->status; |
0f64478c | 960 | |
81105984 | 961 | if (status) { |
9eecf808 | 962 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
963 | return; |
964 | } | |
965 | ||
966 | mos7720_port = urb->context; | |
967 | if (!mos7720_port) { | |
9eecf808 | 968 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
969 | return ; |
970 | } | |
971 | ||
6aad04f2 JS |
972 | if (mos7720_port->open) |
973 | tty_port_tty_wakeup(&mos7720_port->port->port); | |
0f64478c GKH |
974 | } |
975 | ||
07814246 JH |
976 | static int mos77xx_calc_num_ports(struct usb_serial *serial, |
977 | struct usb_serial_endpoints *epds) | |
fb088e33 MD |
978 | { |
979 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
d760557d JH |
980 | |
981 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
982 | /* | |
983 | * The 7715 uses the first bulk in/out endpoint pair for the | |
984 | * parallel port, and the second for the serial port. We swap | |
985 | * the endpoint descriptors here so that the the first and | |
986 | * only registered port structure uses the serial-port | |
987 | * endpoints. | |
988 | */ | |
989 | swap(epds->bulk_in[0], epds->bulk_in[1]); | |
990 | swap(epds->bulk_out[0], epds->bulk_out[1]); | |
991 | ||
fb088e33 | 992 | return 1; |
d760557d | 993 | } |
fb088e33 MD |
994 | |
995 | return 2; | |
996 | } | |
997 | ||
a509a7e4 | 998 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
999 | { |
1000 | struct usb_serial *serial; | |
0f64478c | 1001 | struct urb *urb; |
0f64478c GKH |
1002 | struct moschip_port *mos7720_port; |
1003 | int response; | |
1004 | int port_number; | |
63b91767 | 1005 | __u8 data; |
fe4b65ec | 1006 | int allocated_urbs = 0; |
0f64478c GKH |
1007 | int j; |
1008 | ||
1009 | serial = port->serial; | |
1010 | ||
1011 | mos7720_port = usb_get_serial_port_data(port); | |
1012 | if (mos7720_port == NULL) | |
1013 | return -ENODEV; | |
1014 | ||
0f64478c GKH |
1015 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
1016 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
1017 | ||
1018 | /* Initialising the write urb pool */ | |
1019 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 1020 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c | 1021 | mos7720_port->write_urb_pool[j] = urb; |
10c642d0 | 1022 | if (!urb) |
0f64478c | 1023 | continue; |
0f64478c GKH |
1024 | |
1025 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1026 | GFP_KERNEL); | |
1027 | if (!urb->transfer_buffer) { | |
fe4b65ec ON |
1028 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1029 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1030 | continue; |
1031 | } | |
fe4b65ec | 1032 | allocated_urbs++; |
0f64478c GKH |
1033 | } |
1034 | ||
fe4b65ec ON |
1035 | if (!allocated_urbs) |
1036 | return -ENOMEM; | |
1037 | ||
0f64478c GKH |
1038 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1039 | * | |
1040 | * Register Index | |
ee5729ec SM |
1041 | * 0 : MOS7720_THR/MOS7720_RHR |
1042 | * 1 : MOS7720_IER | |
1043 | * 2 : MOS7720_FCR | |
1044 | * 3 : MOS7720_LCR | |
1045 | * 4 : MOS7720_MCR | |
1046 | * 5 : MOS7720_LSR | |
1047 | * 6 : MOS7720_MSR | |
1048 | * 7 : MOS7720_SPR | |
0f64478c GKH |
1049 | * |
1050 | * 0x08 : SP1/2 Control Reg | |
1051 | */ | |
1143832e | 1052 | port_number = port->port_number; |
ee5729ec | 1053 | read_mos_reg(serial, port_number, MOS7720_LSR, &data); |
63b91767 | 1054 | |
9eecf808 | 1055 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1056 | |
ee5729ec SM |
1057 | write_mos_reg(serial, dummy, MOS7720_SP1_REG, 0x02); |
1058 | write_mos_reg(serial, dummy, MOS7720_SP2_REG, 0x02); | |
0f64478c | 1059 | |
ee5729ec SM |
1060 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1061 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
0f64478c | 1062 | |
ee5729ec | 1063 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); |
63b91767 | 1064 | mos7720_port->shadowLCR = 0x03; |
ee5729ec SM |
1065 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1066 | mos7720_port->shadowLCR); | |
63b91767 | 1067 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1068 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1069 | mos7720_port->shadowMCR); | |
0f64478c | 1070 | |
ee5729ec SM |
1071 | write_mos_reg(serial, port_number, MOS7720_SP_CONTROL_REG, 0x00); |
1072 | read_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, &data); | |
1143832e | 1073 | data = data | (port->port_number + 1); |
ee5729ec | 1074 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, data); |
63b91767 | 1075 | mos7720_port->shadowLCR = 0x83; |
ee5729ec SM |
1076 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1077 | mos7720_port->shadowLCR); | |
1078 | write_mos_reg(serial, port_number, MOS7720_THR, 0x0c); | |
1079 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); | |
63b91767 | 1080 | mos7720_port->shadowLCR = 0x03; |
ee5729ec SM |
1081 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1082 | mos7720_port->shadowLCR); | |
1083 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); | |
0f64478c | 1084 | |
0f64478c GKH |
1085 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1086 | if (response) | |
4da1a17d AC |
1087 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1088 | __func__, response); | |
0f64478c | 1089 | |
0f64478c GKH |
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 | ||
ee5729ec SM |
1156 | write_mos_reg(serial, port->port_number, MOS7720_MCR, 0x00); |
1157 | write_mos_reg(serial, port->port_number, MOS7720_IER, 0x00); | |
cf41aa9e | 1158 | |
0f64478c | 1159 | mos7720_port->open = 0; |
0f64478c GKH |
1160 | } |
1161 | ||
95da310e | 1162 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1163 | { |
95da310e | 1164 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1165 | unsigned char data; |
0f64478c GKH |
1166 | struct usb_serial *serial; |
1167 | struct moschip_port *mos7720_port; | |
1168 | ||
0f64478c GKH |
1169 | serial = port->serial; |
1170 | ||
1171 | mos7720_port = usb_get_serial_port_data(port); | |
1172 | if (mos7720_port == NULL) | |
1173 | return; | |
1174 | ||
1175 | if (break_state == -1) | |
1176 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1177 | else | |
1178 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1179 | ||
1180 | mos7720_port->shadowLCR = data; | |
ee5729ec SM |
1181 | write_mos_reg(serial, port->port_number, MOS7720_LCR, |
1182 | mos7720_port->shadowLCR); | |
0f64478c GKH |
1183 | } |
1184 | ||
1185 | /* | |
1186 | * mos7720_write_room | |
1187 | * this function is called by the tty driver when it wants to know how many | |
1188 | * bytes of data we can accept for a specific port. | |
1189 | * If successful, we return the amount of room that we have for this port | |
1190 | * Otherwise we return a negative error number. | |
1191 | */ | |
95da310e | 1192 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1193 | { |
95da310e | 1194 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1195 | struct moschip_port *mos7720_port; |
1196 | int room = 0; | |
1197 | int i; | |
1198 | ||
0f64478c | 1199 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1200 | if (mos7720_port == NULL) |
0f64478c | 1201 | return -ENODEV; |
0f64478c | 1202 | |
a5b6f60c | 1203 | /* FIXME: Locking */ |
0f64478c | 1204 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1205 | if (mos7720_port->write_urb_pool[i] && |
1206 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1207 | room += URB_TRANSFER_BUFFER_SIZE; |
1208 | } | |
1209 | ||
9eecf808 | 1210 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1211 | return room; |
1212 | } | |
1213 | ||
95da310e AC |
1214 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1215 | const unsigned char *data, int count) | |
0f64478c GKH |
1216 | { |
1217 | int status; | |
1218 | int i; | |
1219 | int bytes_sent = 0; | |
1220 | int transfer_size; | |
1221 | ||
1222 | struct moschip_port *mos7720_port; | |
1223 | struct usb_serial *serial; | |
1224 | struct urb *urb; | |
1225 | const unsigned char *current_position = data; | |
1226 | ||
0f64478c GKH |
1227 | serial = port->serial; |
1228 | ||
1229 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1230 | if (mos7720_port == NULL) |
0f64478c | 1231 | return -ENODEV; |
0f64478c GKH |
1232 | |
1233 | /* try to find a free urb in the list */ | |
1234 | urb = NULL; | |
1235 | ||
1236 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1237 | if (mos7720_port->write_urb_pool[i] && |
1238 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1239 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1240 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1241 | break; |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (urb == NULL) { | |
9eecf808 | 1246 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1247 | goto exit; |
1248 | } | |
1249 | ||
1250 | if (urb->transfer_buffer == NULL) { | |
1251 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
5a5a1d61 | 1252 | GFP_ATOMIC); |
10c642d0 | 1253 | if (!urb->transfer_buffer) |
0f64478c | 1254 | goto exit; |
0f64478c | 1255 | } |
4da1a17d | 1256 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1257 | |
1258 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1259 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1260 | urb->transfer_buffer); |
1261 | ||
1262 | /* fill urb with data and submit */ | |
1263 | usb_fill_bulk_urb(urb, serial->dev, | |
1264 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1265 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1266 | urb->transfer_buffer, transfer_size, |
1267 | mos7720_bulk_out_data_callback, mos7720_port); | |
1268 | ||
1269 | /* send it down the pipe */ | |
4da1a17d | 1270 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1271 | if (status) { |
22a416c4 | 1272 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1273 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1274 | bytes_sent = status; |
1275 | goto exit; | |
1276 | } | |
1277 | bytes_sent = transfer_size; | |
1278 | ||
1279 | exit: | |
1280 | return bytes_sent; | |
1281 | } | |
1282 | ||
95da310e | 1283 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1284 | { |
95da310e | 1285 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1286 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1287 | int status; |
1288 | ||
0f64478c GKH |
1289 | mos7720_port = usb_get_serial_port_data(port); |
1290 | ||
1291 | if (mos7720_port == NULL) | |
1292 | return; | |
1293 | ||
1294 | if (!mos7720_port->open) { | |
9eecf808 | 1295 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1296 | return; |
1297 | } | |
1298 | ||
0f64478c GKH |
1299 | /* if we are implementing XON/XOFF, send the stop character */ |
1300 | if (I_IXOFF(tty)) { | |
1301 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1302 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1303 | if (status <= 0) |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | /* if we are implementing RTS/CTS, toggle that line */ | |
9db276f8 | 1308 | if (C_CRTSCTS(tty)) { |
0f64478c | 1309 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
ee5729ec | 1310 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1311 | mos7720_port->shadowMCR); |
0f64478c GKH |
1312 | } |
1313 | } | |
1314 | ||
95da310e | 1315 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1316 | { |
95da310e | 1317 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1318 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1319 | int status; |
0f64478c GKH |
1320 | |
1321 | if (mos7720_port == NULL) | |
1322 | return; | |
1323 | ||
1324 | if (!mos7720_port->open) { | |
9eecf808 | 1325 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1326 | return; |
1327 | } | |
1328 | ||
0f64478c GKH |
1329 | /* if we are implementing XON/XOFF, send the start character */ |
1330 | if (I_IXOFF(tty)) { | |
1331 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1332 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1333 | if (status <= 0) |
1334 | return; | |
1335 | } | |
1336 | ||
1337 | /* if we are implementing RTS/CTS, toggle that line */ | |
9db276f8 | 1338 | if (C_CRTSCTS(tty)) { |
0f64478c | 1339 | mos7720_port->shadowMCR |= UART_MCR_RTS; |
ee5729ec | 1340 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1341 | mos7720_port->shadowMCR); |
0f64478c GKH |
1342 | } |
1343 | } | |
1344 | ||
b69578df | 1345 | /* FIXME: this function does not work */ |
0f64478c GKH |
1346 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1347 | unsigned int baud) | |
1348 | { | |
0f64478c GKH |
1349 | struct usb_serial_port *port; |
1350 | struct usb_serial *serial; | |
1351 | int port_number; | |
63b91767 | 1352 | enum mos_regs sp_reg; |
0f64478c GKH |
1353 | if (mos7720_port == NULL) |
1354 | return -EINVAL; | |
1355 | ||
1356 | port = mos7720_port->port; | |
1357 | serial = port->serial; | |
1358 | ||
4da1a17d AC |
1359 | /*********************************************** |
1360 | * Init Sequence for higher rates | |
1361 | ***********************************************/ | |
9eecf808 | 1362 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
1143832e | 1363 | port_number = port->port_number; |
0f64478c | 1364 | |
ee5729ec SM |
1365 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1366 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
1367 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); | |
63b91767 | 1368 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1369 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1370 | mos7720_port->shadowMCR); | |
1371 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x00); | |
0f64478c | 1372 | |
4da1a17d AC |
1373 | /*********************************************** |
1374 | * Set for higher rates * | |
1375 | ***********************************************/ | |
b69578df | 1376 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 | 1377 | if (port_number == 0) |
ee5729ec | 1378 | sp_reg = MOS7720_SP1_REG; |
63b91767 | 1379 | else |
ee5729ec | 1380 | sp_reg = MOS7720_SP2_REG; |
63b91767 | 1381 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); |
ee5729ec | 1382 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x03); |
63b91767 | 1383 | mos7720_port->shadowMCR = 0x2b; |
ee5729ec SM |
1384 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1385 | mos7720_port->shadowMCR); | |
0f64478c | 1386 | |
4da1a17d AC |
1387 | /*********************************************** |
1388 | * Set DLL/DLM | |
1389 | ***********************************************/ | |
63b91767 | 1390 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
ee5729ec SM |
1391 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1392 | mos7720_port->shadowLCR); | |
1393 | write_mos_reg(serial, port_number, MOS7720_DLL, 0x01); | |
1394 | write_mos_reg(serial, port_number, MOS7720_DLM, 0x00); | |
63b91767 | 1395 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
ee5729ec SM |
1396 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1397 | mos7720_port->shadowLCR); | |
0f64478c GKH |
1398 | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | /* baud rate information */ | |
4da1a17d | 1403 | struct divisor_table_entry { |
0f64478c GKH |
1404 | __u32 baudrate; |
1405 | __u16 divisor; | |
1406 | }; | |
1407 | ||
1408 | /* Define table of divisors for moschip 7720 hardware * | |
1409 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1410 | * MCR.7 = 0. */ | |
4f37fa54 | 1411 | static const struct divisor_table_entry divisor_table[] = { |
0f64478c GKH |
1412 | { 50, 2304}, |
1413 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1414 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1415 | { 150, 768}, | |
1416 | { 300, 384}, | |
1417 | { 600, 192}, | |
1418 | { 1200, 96}, | |
1419 | { 1800, 64}, | |
1420 | { 2400, 48}, | |
1421 | { 4800, 24}, | |
1422 | { 7200, 16}, | |
1423 | { 9600, 12}, | |
1424 | { 19200, 6}, | |
1425 | { 38400, 3}, | |
1426 | { 57600, 2}, | |
1427 | { 115200, 1}, | |
1428 | }; | |
1429 | ||
1430 | /***************************************************************************** | |
1431 | * calc_baud_rate_divisor | |
1432 | * this function calculates the proper baud rate divisor for the specified | |
1433 | * baud rate. | |
1434 | *****************************************************************************/ | |
9eecf808 | 1435 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1436 | { |
1437 | int i; | |
1438 | __u16 custom; | |
1439 | __u16 round1; | |
1440 | __u16 round; | |
1441 | ||
1442 | ||
9eecf808 | 1443 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1444 | |
1445 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1446 | if (divisor_table[i].baudrate == baudrate) { | |
1447 | *divisor = divisor_table[i].divisor; | |
1448 | return 0; | |
1449 | } | |
1450 | } | |
1451 | ||
4da1a17d AC |
1452 | /* After trying for all the standard baud rates * |
1453 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1454 | if (baudrate > 75 && baudrate < 230400) { |
1455 | /* get the divisor */ | |
1456 | custom = (__u16)(230400L / baudrate); | |
1457 | ||
1458 | /* Check for round off */ | |
1459 | round1 = (__u16)(2304000L / baudrate); | |
1460 | round = (__u16)(round1 - (custom * 10)); | |
1461 | if (round > 4) | |
1462 | custom++; | |
1463 | *divisor = custom; | |
1464 | ||
9eecf808 | 1465 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1466 | return 0; |
1467 | } | |
1468 | ||
9eecf808 | 1469 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1470 | return -EINVAL; |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * send_cmd_write_baud_rate | |
1475 | * this function sends the proper command to change the baud rate of the | |
1476 | * specified port. | |
1477 | */ | |
1478 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1479 | int baudrate) | |
1480 | { | |
1481 | struct usb_serial_port *port; | |
1482 | struct usb_serial *serial; | |
1483 | int divisor; | |
1484 | int status; | |
0f64478c GKH |
1485 | unsigned char number; |
1486 | ||
1487 | if (mos7720_port == NULL) | |
1488 | return -1; | |
1489 | ||
1490 | port = mos7720_port->port; | |
1491 | serial = port->serial; | |
1492 | ||
1143832e | 1493 | number = port->port_number; |
9eecf808 | 1494 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1495 | |
4da1a17d | 1496 | /* Calculate the Divisor */ |
9eecf808 | 1497 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1498 | if (status) { |
194343d9 | 1499 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1500 | return status; |
1501 | } | |
1502 | ||
4da1a17d | 1503 | /* Enable access to divisor latch */ |
63b91767 | 1504 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
ee5729ec | 1505 | write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1506 | |
1507 | /* Write the divisor */ | |
ee5729ec SM |
1508 | write_mos_reg(serial, number, MOS7720_DLL, (__u8)(divisor & 0xff)); |
1509 | write_mos_reg(serial, number, MOS7720_DLM, | |
1510 | (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1511 | |
4da1a17d | 1512 | /* Disable access to divisor latch */ |
63b91767 | 1513 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
ee5729ec | 1514 | write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1515 | |
1516 | return status; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * change_port_settings | |
1521 | * This routine is called to set the UART on the device to match | |
1522 | * the specified new settings. | |
1523 | */ | |
95da310e AC |
1524 | static void change_port_settings(struct tty_struct *tty, |
1525 | struct moschip_port *mos7720_port, | |
606d099c | 1526 | struct ktermios *old_termios) |
0f64478c GKH |
1527 | { |
1528 | struct usb_serial_port *port; | |
1529 | struct usb_serial *serial; | |
0f64478c GKH |
1530 | int baud; |
1531 | unsigned cflag; | |
1532 | unsigned iflag; | |
1533 | __u8 mask = 0xff; | |
1534 | __u8 lData; | |
1535 | __u8 lParity; | |
1536 | __u8 lStop; | |
1537 | int status; | |
1538 | int port_number; | |
0f64478c GKH |
1539 | |
1540 | if (mos7720_port == NULL) | |
1541 | return ; | |
1542 | ||
1543 | port = mos7720_port->port; | |
1544 | serial = port->serial; | |
1143832e | 1545 | port_number = port->port_number; |
0f64478c | 1546 | |
0f64478c | 1547 | if (!mos7720_port->open) { |
9eecf808 | 1548 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1549 | return; |
1550 | } | |
1551 | ||
0f64478c GKH |
1552 | lData = UART_LCR_WLEN8; |
1553 | lStop = 0x00; /* 1 stop bit */ | |
1554 | lParity = 0x00; /* No parity */ | |
1555 | ||
adc8d746 AC |
1556 | cflag = tty->termios.c_cflag; |
1557 | iflag = tty->termios.c_iflag; | |
0f64478c GKH |
1558 | |
1559 | /* Change the number of bits */ | |
1560 | switch (cflag & CSIZE) { | |
1561 | case CS5: | |
1562 | lData = UART_LCR_WLEN5; | |
1563 | mask = 0x1f; | |
1564 | break; | |
1565 | ||
1566 | case CS6: | |
1567 | lData = UART_LCR_WLEN6; | |
1568 | mask = 0x3f; | |
1569 | break; | |
1570 | ||
1571 | case CS7: | |
1572 | lData = UART_LCR_WLEN7; | |
1573 | mask = 0x7f; | |
1574 | break; | |
1575 | default: | |
1576 | case CS8: | |
1577 | lData = UART_LCR_WLEN8; | |
1578 | break; | |
1579 | } | |
1580 | ||
1581 | /* Change the Parity bit */ | |
1582 | if (cflag & PARENB) { | |
1583 | if (cflag & PARODD) { | |
1584 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1585 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1586 | } else { |
1587 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1588 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1589 | } |
1590 | ||
1591 | } else { | |
9eecf808 | 1592 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1593 | } |
1594 | ||
1595 | if (cflag & CMSPAR) | |
1596 | lParity = lParity | 0x20; | |
1597 | ||
1598 | /* Change the Stop bit */ | |
1599 | if (cflag & CSTOPB) { | |
1600 | lStop = UART_LCR_STOP; | |
9eecf808 | 1601 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1602 | } else { |
1603 | lStop = 0x00; | |
9eecf808 | 1604 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1605 | } |
1606 | ||
1607 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1608 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1609 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1610 | ||
1611 | /* Update the LCR with the correct value */ | |
4da1a17d | 1612 | mos7720_port->shadowLCR &= |
63b91767 | 1613 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1614 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1615 | ||
1616 | ||
1617 | /* Disable Interrupts */ | |
ee5729ec SM |
1618 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1619 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
1620 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); | |
0f64478c GKH |
1621 | |
1622 | /* Send the updated LCR value to the mos7720 */ | |
ee5729ec SM |
1623 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1624 | mos7720_port->shadowLCR); | |
63b91767 | 1625 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1626 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1627 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1628 | |
1629 | /* set up the MCR register and send it to the mos7720 */ | |
1630 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1631 | if (cflag & CBAUD) | |
1632 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1633 | ||
1634 | if (cflag & CRTSCTS) { | |
1635 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1636 | /* To set hardware flow control to the specified * |
1637 | * serial port, in SP1/2_CONTROL_REG */ | |
a26f009a | 1638 | if (port_number) |
ee5729ec SM |
1639 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, |
1640 | 0x01); | |
63b91767 | 1641 | else |
ee5729ec SM |
1642 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, |
1643 | 0x02); | |
63b91767 MD |
1644 | |
1645 | } else | |
0f64478c | 1646 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1647 | |
ee5729ec SM |
1648 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1649 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1650 | |
1651 | /* Determine divisor based on baud rate */ | |
1652 | baud = tty_get_baud_rate(tty); | |
1653 | if (!baud) { | |
1654 | /* pick a default, any default... */ | |
9eecf808 | 1655 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1656 | baud = 9600; |
1657 | } | |
1658 | ||
1659 | if (baud >= 230400) { | |
1660 | set_higher_rates(mos7720_port, baud); | |
1661 | /* Enable Interrupts */ | |
ee5729ec | 1662 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); |
0f64478c GKH |
1663 | return; |
1664 | } | |
1665 | ||
9eecf808 | 1666 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1667 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1668 | /* FIXME: needs to write actual resulting baud back not just |
1669 | blindly do so */ | |
1670 | if (cflag & CBAUD) | |
1671 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1672 | /* Enable Interrupts */ |
ee5729ec | 1673 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); |
0f64478c GKH |
1674 | |
1675 | if (port->read_urb->status != -EINPROGRESS) { | |
1dbd11be | 1676 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
0f64478c | 1677 | if (status) |
9eecf808 | 1678 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1679 | } |
0f64478c GKH |
1680 | } |
1681 | ||
1682 | /* | |
1683 | * mos7720_set_termios | |
1684 | * this function is called by the tty driver when it wants to change the | |
1685 | * termios structure. | |
1686 | */ | |
95da310e AC |
1687 | static void mos7720_set_termios(struct tty_struct *tty, |
1688 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1689 | { |
1690 | int status; | |
0f64478c GKH |
1691 | struct usb_serial *serial; |
1692 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1693 | |
1694 | serial = port->serial; | |
1695 | ||
1696 | mos7720_port = usb_get_serial_port_data(port); | |
1697 | ||
1698 | if (mos7720_port == NULL) | |
1699 | return; | |
1700 | ||
0f64478c | 1701 | if (!mos7720_port->open) { |
9eecf808 | 1702 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1703 | return; |
1704 | } | |
1705 | ||
0f64478c | 1706 | /* change the port settings to the new ones specified */ |
95da310e | 1707 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1708 | |
4da1a17d | 1709 | if (port->read_urb->status != -EINPROGRESS) { |
1dbd11be | 1710 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
0f64478c | 1711 | if (status) |
9eecf808 | 1712 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1713 | } |
0f64478c GKH |
1714 | } |
1715 | ||
1716 | /* | |
1717 | * get_lsr_info - get line status register info | |
1718 | * | |
1719 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1720 | * is emptied. On bus types like RS485, the transmitter must | |
1721 | * release the bus after transmitting. This must be done when | |
1722 | * the transmit shift register is empty, not be done when the | |
1723 | * transmit holding register is empty. This functionality | |
1724 | * allows an RS485 driver to be written in user space. | |
1725 | */ | |
4da1a17d AC |
1726 | static int get_lsr_info(struct tty_struct *tty, |
1727 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1728 | { |
2f9ea55c | 1729 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1730 | unsigned int result = 0; |
2f9ea55c | 1731 | unsigned char data = 0; |
1143832e | 1732 | int port_number = port->port_number; |
2f9ea55c | 1733 | int count; |
0f64478c | 1734 | |
95da310e | 1735 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1736 | if (count == 0) { |
ee5729ec | 1737 | read_mos_reg(port->serial, port_number, MOS7720_LSR, &data); |
2f9ea55c KS |
1738 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1739 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1740 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1741 | result = TIOCSER_TEMT; |
1742 | } | |
0f64478c | 1743 | } |
0f64478c GKH |
1744 | if (copy_to_user(value, &result, sizeof(int))) |
1745 | return -EFAULT; | |
1746 | return 0; | |
1747 | } | |
1748 | ||
60b33c13 | 1749 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1750 | { |
1751 | struct usb_serial_port *port = tty->driver_data; | |
1752 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1753 | unsigned int result = 0; | |
1754 | unsigned int mcr ; | |
1755 | unsigned int msr ; | |
1756 | ||
0f608f89 KS |
1757 | mcr = mos7720_port->shadowMCR; |
1758 | msr = mos7720_port->shadowMSR; | |
1759 | ||
1760 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1761 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1762 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1763 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1764 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1765 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1766 | ||
0f608f89 KS |
1767 | return result; |
1768 | } | |
1769 | ||
20b9d177 | 1770 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1771 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1772 | { |
1773 | struct usb_serial_port *port = tty->driver_data; | |
1774 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1775 | unsigned int mcr ; | |
0f608f89 KS |
1776 | |
1777 | mcr = mos7720_port->shadowMCR; | |
1778 | ||
1779 | if (set & TIOCM_RTS) | |
1780 | mcr |= UART_MCR_RTS; | |
1781 | if (set & TIOCM_DTR) | |
1782 | mcr |= UART_MCR_DTR; | |
1783 | if (set & TIOCM_LOOP) | |
1784 | mcr |= UART_MCR_LOOP; | |
1785 | ||
1786 | if (clear & TIOCM_RTS) | |
1787 | mcr &= ~UART_MCR_RTS; | |
1788 | if (clear & TIOCM_DTR) | |
1789 | mcr &= ~UART_MCR_DTR; | |
1790 | if (clear & TIOCM_LOOP) | |
1791 | mcr &= ~UART_MCR_LOOP; | |
1792 | ||
1793 | mos7720_port->shadowMCR = mcr; | |
ee5729ec | 1794 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1795 | mos7720_port->shadowMCR); |
0f608f89 KS |
1796 | |
1797 | return 0; | |
1798 | } | |
1799 | ||
0f64478c GKH |
1800 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1801 | unsigned int __user *value) | |
1802 | { | |
0bca1b91 | 1803 | unsigned int mcr; |
0f64478c | 1804 | unsigned int arg; |
0f64478c GKH |
1805 | |
1806 | struct usb_serial_port *port; | |
1807 | ||
1808 | if (mos7720_port == NULL) | |
1809 | return -1; | |
1810 | ||
4da1a17d | 1811 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1812 | mcr = mos7720_port->shadowMCR; |
1813 | ||
1814 | if (copy_from_user(&arg, value, sizeof(int))) | |
1815 | return -EFAULT; | |
1816 | ||
1817 | switch (cmd) { | |
1818 | case TIOCMBIS: | |
1819 | if (arg & TIOCM_RTS) | |
1820 | mcr |= UART_MCR_RTS; | |
1821 | if (arg & TIOCM_DTR) | |
1822 | mcr |= UART_MCR_RTS; | |
1823 | if (arg & TIOCM_LOOP) | |
1824 | mcr |= UART_MCR_LOOP; | |
1825 | break; | |
1826 | ||
1827 | case TIOCMBIC: | |
1828 | if (arg & TIOCM_RTS) | |
1829 | mcr &= ~UART_MCR_RTS; | |
1830 | if (arg & TIOCM_DTR) | |
1831 | mcr &= ~UART_MCR_RTS; | |
1832 | if (arg & TIOCM_LOOP) | |
1833 | mcr &= ~UART_MCR_LOOP; | |
1834 | break; | |
1835 | ||
0f64478c GKH |
1836 | } |
1837 | ||
1838 | mos7720_port->shadowMCR = mcr; | |
ee5729ec | 1839 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1840 | mos7720_port->shadowMCR); |
0f64478c GKH |
1841 | |
1842 | return 0; | |
1843 | } | |
1844 | ||
0f64478c GKH |
1845 | static int get_serial_info(struct moschip_port *mos7720_port, |
1846 | struct serial_struct __user *retinfo) | |
1847 | { | |
1848 | struct serial_struct tmp; | |
1849 | ||
0f64478c GKH |
1850 | memset(&tmp, 0, sizeof(tmp)); |
1851 | ||
1852 | tmp.type = PORT_16550A; | |
e5b1e206 | 1853 | tmp.line = mos7720_port->port->minor; |
1143832e | 1854 | tmp.port = mos7720_port->port->port_number; |
0f64478c | 1855 | tmp.irq = 0; |
4da1a17d | 1856 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1857 | tmp.baud_base = 9600; |
1858 | tmp.close_delay = 5*HZ; | |
1859 | tmp.closing_wait = 30*HZ; | |
1860 | ||
1861 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1862 | return -EFAULT; | |
1863 | return 0; | |
1864 | } | |
1865 | ||
00a0d0d6 | 1866 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1867 | unsigned int cmd, unsigned long arg) |
1868 | { | |
95da310e | 1869 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1870 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1871 | |
1872 | mos7720_port = usb_get_serial_port_data(port); | |
1873 | if (mos7720_port == NULL) | |
1874 | return -ENODEV; | |
1875 | ||
0f64478c | 1876 | switch (cmd) { |
0f64478c | 1877 | case TIOCSERGETLSR: |
9eecf808 | 1878 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1879 | return get_lsr_info(tty, mos7720_port, |
1880 | (unsigned int __user *)arg); | |
0f64478c | 1881 | |
95da310e | 1882 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1883 | case TIOCMBIS: |
1884 | case TIOCMBIC: | |
9eecf808 | 1885 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1886 | return set_modem_info(mos7720_port, cmd, |
1887 | (unsigned int __user *)arg); | |
1888 | ||
0f64478c | 1889 | case TIOCGSERIAL: |
9eecf808 | 1890 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1891 | return get_serial_info(mos7720_port, |
1892 | (struct serial_struct __user *)arg); | |
0f64478c GKH |
1893 | } |
1894 | ||
1895 | return -ENOIOCTLCMD; | |
1896 | } | |
1897 | ||
1898 | static int mos7720_startup(struct usb_serial *serial) | |
1899 | { | |
0f64478c | 1900 | struct usb_device *dev; |
0f64478c | 1901 | char data; |
91f58ae6 | 1902 | u16 product; |
b69578df | 1903 | int ret_val; |
0f64478c | 1904 | |
91f58ae6 | 1905 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
1906 | dev = serial->dev; |
1907 | ||
0f64478c GKH |
1908 | /* setting configuration feature to one */ |
1909 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
849513a7 | 1910 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
0f64478c | 1911 | |
b69578df | 1912 | if (product == MOSCHIP_DEVICE_ID_7715) { |
d760557d JH |
1913 | struct urb *urb = serial->port[0]->interrupt_in_urb; |
1914 | ||
6a1eaf19 | 1915 | urb->complete = mos7715_interrupt_callback; |
d760557d JH |
1916 | |
1917 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
b69578df | 1918 | ret_val = mos7715_parport_init(serial); |
75dd211e | 1919 | if (ret_val < 0) |
b69578df | 1920 | return ret_val; |
b69578df | 1921 | #endif |
d760557d | 1922 | } |
75dd211e JH |
1923 | /* start the interrupt urb */ |
1924 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
1925 | if (ret_val) { | |
1926 | dev_err(&dev->dev, "failed to submit interrupt urb: %d\n", | |
1927 | ret_val); | |
1928 | } | |
1929 | ||
4da1a17d | 1930 | /* LSR For Port 1 */ |
ee5729ec | 1931 | read_mos_reg(serial, 0, MOS7720_LSR, &data); |
9eecf808 | 1932 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
1933 | |
1934 | return 0; | |
1935 | } | |
1936 | ||
f9c99bb8 | 1937 | static void mos7720_release(struct usb_serial *serial) |
0f64478c | 1938 | { |
91a1ff4d JH |
1939 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
1940 | ||
b69578df MD |
1941 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1942 | /* close the parallel port */ | |
1943 | ||
1944 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
1945 | == MOSCHIP_DEVICE_ID_7715) { | |
1946 | struct urbtracker *urbtrack; | |
1947 | unsigned long flags; | |
1948 | struct mos7715_parport *mos_parport = | |
1949 | usb_get_serial_data(serial); | |
1950 | ||
1951 | /* prevent NULL ptr dereference in port callbacks */ | |
1952 | spin_lock(&release_lock); | |
1953 | mos_parport->pp->private_data = NULL; | |
1954 | spin_unlock(&release_lock); | |
1955 | ||
1956 | /* wait for synchronous usb calls to return */ | |
1957 | if (mos_parport->msg_pending) | |
1958 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
849513a7 | 1959 | msecs_to_jiffies(MOS_WDR_TIMEOUT)); |
b69578df MD |
1960 | |
1961 | parport_remove_port(mos_parport->pp); | |
1962 | usb_set_serial_data(serial, NULL); | |
1963 | mos_parport->serial = NULL; | |
1964 | ||
1965 | /* if tasklet currently scheduled, wait for it to complete */ | |
1966 | tasklet_kill(&mos_parport->urb_tasklet); | |
1967 | ||
1968 | /* unlink any urbs sent by the tasklet */ | |
1969 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
1970 | list_for_each_entry(urbtrack, | |
1971 | &mos_parport->active_urbs, | |
1972 | urblist_entry) | |
1973 | usb_unlink_urb(urbtrack->urb); | |
1974 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
dcb21ad4 | 1975 | parport_del_port(mos_parport->pp); |
b69578df MD |
1976 | |
1977 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
1978 | } | |
1979 | #endif | |
4230af57 JH |
1980 | } |
1981 | ||
1982 | static int mos7720_port_probe(struct usb_serial_port *port) | |
1983 | { | |
1984 | struct moschip_port *mos7720_port; | |
1985 | ||
1986 | mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); | |
1987 | if (!mos7720_port) | |
1988 | return -ENOMEM; | |
1989 | ||
4230af57 JH |
1990 | mos7720_port->port = port; |
1991 | ||
1992 | usb_set_serial_port_data(port, mos7720_port); | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | static int mos7720_port_remove(struct usb_serial_port *port) | |
1998 | { | |
1999 | struct moschip_port *mos7720_port; | |
2000 | ||
2001 | mos7720_port = usb_get_serial_port_data(port); | |
2002 | kfree(mos7720_port); | |
2003 | ||
2004 | return 0; | |
0f64478c GKH |
2005 | } |
2006 | ||
2007 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2008 | .driver = { | |
2009 | .owner = THIS_MODULE, | |
2010 | .name = "moschip7720", | |
2011 | }, | |
2012 | .description = "Moschip 2 port adapter", | |
68e24113 | 2013 | .id_table = id_table, |
206ff831 JH |
2014 | .num_bulk_in = 2, |
2015 | .num_bulk_out = 2, | |
6a1eaf19 | 2016 | .num_interrupt_in = 1, |
fb088e33 | 2017 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2018 | .open = mos7720_open, |
2019 | .close = mos7720_close, | |
2020 | .throttle = mos7720_throttle, | |
2021 | .unthrottle = mos7720_unthrottle, | |
2022 | .attach = mos7720_startup, | |
f9c99bb8 | 2023 | .release = mos7720_release, |
4230af57 JH |
2024 | .port_probe = mos7720_port_probe, |
2025 | .port_remove = mos7720_port_remove, | |
0f64478c | 2026 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2027 | .tiocmget = mos7720_tiocmget, |
2028 | .tiocmset = mos7720_tiocmset, | |
0f64478c GKH |
2029 | .set_termios = mos7720_set_termios, |
2030 | .write = mos7720_write, | |
2031 | .write_room = mos7720_write_room, | |
2032 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2033 | .break_ctl = mos7720_break, | |
2034 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fde1faf8 | 2035 | .read_int_callback = mos7720_interrupt_callback, |
0f64478c GKH |
2036 | }; |
2037 | ||
4d2a7aff AS |
2038 | static struct usb_serial_driver * const serial_drivers[] = { |
2039 | &moschip7720_2port_driver, NULL | |
2040 | }; | |
2041 | ||
68e24113 | 2042 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2043 | |
4da1a17d AC |
2044 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2045 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c | 2046 | MODULE_LICENSE("GPL"); |