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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 | ||
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 | 123 | enum mos_regs { |
ee5729ec SM |
124 | MOS7720_THR, /* serial port regs */ |
125 | MOS7720_RHR, | |
126 | MOS7720_IER, | |
127 | MOS7720_FCR, | |
128 | MOS7720_ISR, | |
129 | MOS7720_LCR, | |
130 | MOS7720_MCR, | |
131 | MOS7720_LSR, | |
132 | MOS7720_MSR, | |
133 | MOS7720_SPR, | |
134 | MOS7720_DLL, | |
135 | MOS7720_DLM, | |
136 | MOS7720_DPR, /* parallel port regs */ | |
137 | MOS7720_DSR, | |
138 | MOS7720_DCR, | |
139 | MOS7720_ECR, | |
140 | MOS7720_SP1_REG, /* device control regs */ | |
141 | MOS7720_SP2_REG, /* serial port 2 (7720 only) */ | |
142 | MOS7720_PP_REG, | |
143 | MOS7720_SP_CONTROL_REG, | |
b69578df MD |
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[] = { | |
ee5729ec SM |
153 | 0x00, /* MOS7720_THR */ |
154 | 0x00, /* MOS7720_RHR */ | |
155 | 0x01, /* MOS7720_IER */ | |
156 | 0x02, /* MOS7720_FCR */ | |
157 | 0x02, /* MOS7720_ISR */ | |
158 | 0x03, /* MOS7720_LCR */ | |
159 | 0x04, /* MOS7720_MCR */ | |
160 | 0x05, /* MOS7720_LSR */ | |
161 | 0x06, /* MOS7720_MSR */ | |
162 | 0x07, /* MOS7720_SPR */ | |
163 | 0x00, /* MOS7720_DLL */ | |
164 | 0x01, /* MOS7720_DLM */ | |
165 | 0x00, /* MOS7720_DPR */ | |
166 | 0x01, /* MOS7720_DSR */ | |
167 | 0x02, /* MOS7720_DCR */ | |
168 | 0x0a, /* MOS7720_ECR */ | |
169 | 0x01, /* MOS7720_SP1_REG */ | |
170 | 0x02, /* MOS7720_SP2_REG (7720 only) */ | |
171 | 0x04, /* MOS7720_PP_REG (7715 only) */ | |
172 | 0x08, /* MOS7720_SP_CONTROL_REG */ | |
b69578df MD |
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 | 183 | { |
ee5729ec | 184 | if (reg >= MOS7720_SP1_REG) /* control reg */ |
b69578df | 185 | return 0x0000; |
63b91767 | 186 | |
ee5729ec | 187 | else if (reg >= MOS7720_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, | |
d9a38a87 | 212 | "mos7720: usb_control_msg() failed: %d\n", status); |
b69578df MD |
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 | 242 | dev_err(&usbdev->dev, |
d9a38a87 | 243 | "mos7720: usb_control_msg() failed: %d\n", 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; | |
ee5729ec SM |
255 | write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, |
256 | mos_parport->shadowECR); | |
b69578df MD |
257 | return 0; |
258 | } | |
259 | ||
260 | static void destroy_mos_parport(struct kref *kref) | |
261 | { | |
262 | struct mos7715_parport *mos_parport = | |
263 | container_of(kref, struct mos7715_parport, ref_count); | |
264 | ||
b69578df MD |
265 | kfree(mos_parport); |
266 | } | |
267 | ||
268 | static void destroy_urbtracker(struct kref *kref) | |
269 | { | |
270 | struct urbtracker *urbtrack = | |
271 | container_of(kref, struct urbtracker, ref_count); | |
272 | struct mos7715_parport *mos_parport = urbtrack->mos_parport; | |
ca09907d | 273 | |
b69578df | 274 | usb_free_urb(urbtrack->urb); |
ef6c8c1d | 275 | kfree(urbtrack->setup); |
b69578df MD |
276 | kfree(urbtrack); |
277 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
278 | } | |
279 | ||
280 | /* | |
281 | * This runs as a tasklet when sending an urb in a non-blocking parallel | |
282 | * port callback had to be deferred because the disconnect mutex could not be | |
283 | * obtained at the time. | |
284 | */ | |
285 | static void send_deferred_urbs(unsigned long _mos_parport) | |
286 | { | |
287 | int ret_val; | |
288 | unsigned long flags; | |
289 | struct mos7715_parport *mos_parport = (void *)_mos_parport; | |
67990472 | 290 | struct urbtracker *urbtrack, *tmp; |
b69578df | 291 | struct list_head *cursor, *next; |
9eecf808 | 292 | struct device *dev; |
b69578df | 293 | |
b69578df MD |
294 | /* if release function ran, game over */ |
295 | if (unlikely(mos_parport->serial == NULL)) | |
296 | return; | |
297 | ||
9eecf808 GKH |
298 | dev = &mos_parport->serial->dev->dev; |
299 | ||
b69578df MD |
300 | /* try again to get the mutex */ |
301 | if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { | |
9eecf808 | 302 | dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); |
b69578df MD |
303 | tasklet_schedule(&mos_parport->urb_tasklet); |
304 | return; | |
305 | } | |
306 | ||
307 | /* if device disconnected, game over */ | |
308 | if (unlikely(mos_parport->serial->disconnected)) { | |
309 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
310 | return; | |
311 | } | |
312 | ||
313 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
314 | if (list_empty(&mos_parport->deferred_urbs)) { | |
315 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
316 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
9eecf808 | 317 | dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); |
b69578df MD |
318 | return; |
319 | } | |
320 | ||
321 | /* move contents of deferred_urbs list to active_urbs list and submit */ | |
322 | list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) | |
323 | list_move_tail(cursor, &mos_parport->active_urbs); | |
67990472 | 324 | list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, |
b69578df MD |
325 | urblist_entry) { |
326 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
9eecf808 | 327 | dev_dbg(dev, "%s: urb submitted\n", __func__); |
b69578df | 328 | if (ret_val) { |
9eecf808 | 329 | dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); |
b69578df MD |
330 | list_del(&urbtrack->urblist_entry); |
331 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
332 | } | |
333 | } | |
334 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
335 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
336 | } | |
337 | ||
338 | /* callback for parallel port control urbs submitted asynchronously */ | |
339 | static void async_complete(struct urb *urb) | |
340 | { | |
341 | struct urbtracker *urbtrack = urb->context; | |
342 | int status = urb->status; | |
ca09907d | 343 | |
b69578df | 344 | if (unlikely(status)) |
9eecf808 | 345 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
b69578df MD |
346 | |
347 | /* remove the urbtracker from the active_urbs list */ | |
348 | spin_lock(&urbtrack->mos_parport->listlock); | |
349 | list_del(&urbtrack->urblist_entry); | |
350 | spin_unlock(&urbtrack->mos_parport->listlock); | |
351 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
352 | } | |
353 | ||
354 | static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, | |
355 | enum mos_regs reg, __u8 data) | |
356 | { | |
357 | struct urbtracker *urbtrack; | |
358 | int ret_val; | |
359 | unsigned long flags; | |
b69578df MD |
360 | struct usb_serial *serial = mos_parport->serial; |
361 | struct usb_device *usbdev = serial->dev; | |
b69578df MD |
362 | |
363 | /* create and initialize the control urb and containing urbtracker */ | |
364 | urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); | |
10c642d0 | 365 | if (!urbtrack) |
b69578df | 366 | return -ENOMEM; |
10c642d0 | 367 | |
b69578df MD |
368 | kref_get(&mos_parport->ref_count); |
369 | urbtrack->mos_parport = mos_parport; | |
370 | urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); | |
10c642d0 | 371 | if (!urbtrack->urb) { |
b69578df MD |
372 | kfree(urbtrack); |
373 | return -ENOMEM; | |
374 | } | |
d0bd9a41 | 375 | urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); |
ef6c8c1d JH |
376 | if (!urbtrack->setup) { |
377 | usb_free_urb(urbtrack->urb); | |
378 | kfree(urbtrack); | |
379 | return -ENOMEM; | |
380 | } | |
381 | urbtrack->setup->bRequestType = (__u8)0x40; | |
382 | urbtrack->setup->bRequest = (__u8)0x0e; | |
3b716caf JH |
383 | urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); |
384 | urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); | |
ef6c8c1d | 385 | urbtrack->setup->wLength = 0; |
b69578df MD |
386 | usb_fill_control_urb(urbtrack->urb, usbdev, |
387 | usb_sndctrlpipe(usbdev, 0), | |
ef6c8c1d | 388 | (unsigned char *)urbtrack->setup, |
b69578df MD |
389 | NULL, 0, async_complete, urbtrack); |
390 | kref_init(&urbtrack->ref_count); | |
391 | INIT_LIST_HEAD(&urbtrack->urblist_entry); | |
392 | ||
393 | /* | |
394 | * get the disconnect mutex, or add tracker to the deferred_urbs list | |
395 | * and schedule a tasklet to try again later | |
396 | */ | |
397 | if (!mutex_trylock(&serial->disc_mutex)) { | |
398 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
399 | list_add_tail(&urbtrack->urblist_entry, | |
400 | &mos_parport->deferred_urbs); | |
401 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
402 | tasklet_schedule(&mos_parport->urb_tasklet); | |
d9a38a87 | 403 | dev_dbg(&usbdev->dev, "tasklet scheduled\n"); |
b69578df MD |
404 | return 0; |
405 | } | |
406 | ||
407 | /* bail if device disconnected */ | |
408 | if (serial->disconnected) { | |
409 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
410 | mutex_unlock(&serial->disc_mutex); | |
411 | return -ENODEV; | |
412 | } | |
413 | ||
414 | /* add the tracker to the active_urbs list and submit */ | |
415 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
416 | list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); | |
417 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
418 | ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); | |
419 | mutex_unlock(&serial->disc_mutex); | |
420 | if (ret_val) { | |
421 | dev_err(&usbdev->dev, | |
d9a38a87 | 422 | "%s: submit_urb() failed: %d\n", __func__, ret_val); |
b69578df MD |
423 | spin_lock_irqsave(&mos_parport->listlock, flags); |
424 | list_del(&urbtrack->urblist_entry); | |
425 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
426 | kref_put(&urbtrack->ref_count, destroy_urbtracker); | |
427 | return ret_val; | |
428 | } | |
429 | return 0; | |
430 | } | |
431 | ||
432 | /* | |
433 | * This is the the common top part of all parallel port callback operations that | |
434 | * send synchronous messages to the device. This implements convoluted locking | |
435 | * that avoids two scenarios: (1) a port operation is called after usbserial | |
436 | * has called our release function, at which point struct mos7715_parport has | |
437 | * been destroyed, and (2) the device has been disconnected, but usbserial has | |
438 | * not called the release function yet because someone has a serial port open. | |
439 | * The shared release_lock prevents the first, and the mutex and disconnected | |
440 | * flag maintained by usbserial covers the second. We also use the msg_pending | |
cd8c5053 | 441 | * flag to ensure that all synchronous usb message calls have completed before |
b69578df MD |
442 | * our release function can return. |
443 | */ | |
444 | static int parport_prologue(struct parport *pp) | |
445 | { | |
446 | struct mos7715_parport *mos_parport; | |
447 | ||
448 | spin_lock(&release_lock); | |
449 | mos_parport = pp->private_data; | |
450 | if (unlikely(mos_parport == NULL)) { | |
451 | /* release fn called, port struct destroyed */ | |
452 | spin_unlock(&release_lock); | |
453 | return -1; | |
454 | } | |
455 | mos_parport->msg_pending = true; /* synch usb call pending */ | |
16735d02 | 456 | reinit_completion(&mos_parport->syncmsg_compl); |
b69578df MD |
457 | spin_unlock(&release_lock); |
458 | ||
459 | mutex_lock(&mos_parport->serial->disc_mutex); | |
460 | if (mos_parport->serial->disconnected) { | |
461 | /* device disconnected */ | |
462 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
463 | mos_parport->msg_pending = false; | |
464 | complete(&mos_parport->syncmsg_compl); | |
465 | return -1; | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | /* | |
cd8c5053 | 472 | * This is the common bottom part of all parallel port functions that send |
b69578df MD |
473 | * synchronous messages to the device. |
474 | */ | |
475 | static inline void parport_epilogue(struct parport *pp) | |
476 | { | |
477 | struct mos7715_parport *mos_parport = pp->private_data; | |
478 | mutex_unlock(&mos_parport->serial->disc_mutex); | |
479 | mos_parport->msg_pending = false; | |
480 | complete(&mos_parport->syncmsg_compl); | |
481 | } | |
482 | ||
483 | static void parport_mos7715_write_data(struct parport *pp, unsigned char d) | |
484 | { | |
485 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 486 | |
b69578df MD |
487 | if (parport_prologue(pp) < 0) |
488 | return; | |
489 | mos7715_change_mode(mos_parport, SPP); | |
ee5729ec | 490 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, (__u8)d); |
b69578df MD |
491 | parport_epilogue(pp); |
492 | } | |
493 | ||
494 | static unsigned char parport_mos7715_read_data(struct parport *pp) | |
495 | { | |
496 | struct mos7715_parport *mos_parport = pp->private_data; | |
497 | unsigned char d; | |
ca09907d | 498 | |
b69578df MD |
499 | if (parport_prologue(pp) < 0) |
500 | return 0; | |
ee5729ec | 501 | read_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, &d); |
b69578df MD |
502 | parport_epilogue(pp); |
503 | return d; | |
504 | } | |
505 | ||
506 | static void parport_mos7715_write_control(struct parport *pp, unsigned char d) | |
507 | { | |
508 | struct mos7715_parport *mos_parport = pp->private_data; | |
509 | __u8 data; | |
ca09907d | 510 | |
b69578df MD |
511 | if (parport_prologue(pp) < 0) |
512 | return; | |
513 | data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); | |
ee5729ec | 514 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, data); |
b69578df MD |
515 | mos_parport->shadowDCR = data; |
516 | parport_epilogue(pp); | |
517 | } | |
518 | ||
519 | static unsigned char parport_mos7715_read_control(struct parport *pp) | |
520 | { | |
521 | struct mos7715_parport *mos_parport = pp->private_data; | |
522 | __u8 dcr; | |
ca09907d | 523 | |
b69578df MD |
524 | spin_lock(&release_lock); |
525 | mos_parport = pp->private_data; | |
526 | if (unlikely(mos_parport == NULL)) { | |
527 | spin_unlock(&release_lock); | |
528 | return 0; | |
529 | } | |
530 | dcr = mos_parport->shadowDCR & 0x0f; | |
531 | spin_unlock(&release_lock); | |
532 | return dcr; | |
533 | } | |
534 | ||
535 | static unsigned char parport_mos7715_frob_control(struct parport *pp, | |
536 | unsigned char mask, | |
537 | unsigned char val) | |
538 | { | |
539 | struct mos7715_parport *mos_parport = pp->private_data; | |
540 | __u8 dcr; | |
ca09907d | 541 | |
b69578df MD |
542 | mask &= 0x0f; |
543 | val &= 0x0f; | |
544 | if (parport_prologue(pp) < 0) | |
545 | return 0; | |
546 | mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; | |
ee5729ec SM |
547 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
548 | mos_parport->shadowDCR); | |
b69578df MD |
549 | dcr = mos_parport->shadowDCR & 0x0f; |
550 | parport_epilogue(pp); | |
551 | return dcr; | |
552 | } | |
553 | ||
554 | static unsigned char parport_mos7715_read_status(struct parport *pp) | |
555 | { | |
556 | unsigned char status; | |
557 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 558 | |
b69578df MD |
559 | spin_lock(&release_lock); |
560 | mos_parport = pp->private_data; | |
561 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
562 | spin_unlock(&release_lock); | |
563 | return 0; | |
564 | } | |
565 | status = atomic_read(&mos_parport->shadowDSR) & 0xf8; | |
566 | spin_unlock(&release_lock); | |
567 | return status; | |
568 | } | |
569 | ||
570 | static void parport_mos7715_enable_irq(struct parport *pp) | |
571 | { | |
b69578df | 572 | } |
ca09907d | 573 | |
b69578df MD |
574 | static void parport_mos7715_disable_irq(struct parport *pp) |
575 | { | |
b69578df MD |
576 | } |
577 | ||
578 | static void parport_mos7715_data_forward(struct parport *pp) | |
579 | { | |
580 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 581 | |
b69578df MD |
582 | if (parport_prologue(pp) < 0) |
583 | return; | |
584 | mos7715_change_mode(mos_parport, PS2); | |
585 | mos_parport->shadowDCR &= ~0x20; | |
ee5729ec SM |
586 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
587 | mos_parport->shadowDCR); | |
b69578df MD |
588 | parport_epilogue(pp); |
589 | } | |
590 | ||
591 | static void parport_mos7715_data_reverse(struct parport *pp) | |
592 | { | |
593 | struct mos7715_parport *mos_parport = pp->private_data; | |
ca09907d | 594 | |
b69578df MD |
595 | if (parport_prologue(pp) < 0) |
596 | return; | |
597 | mos7715_change_mode(mos_parport, PS2); | |
598 | mos_parport->shadowDCR |= 0x20; | |
ee5729ec SM |
599 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
600 | mos_parport->shadowDCR); | |
b69578df MD |
601 | parport_epilogue(pp); |
602 | } | |
603 | ||
604 | static void parport_mos7715_init_state(struct pardevice *dev, | |
605 | struct parport_state *s) | |
606 | { | |
b69578df MD |
607 | s->u.pc.ctr = DCR_INIT_VAL; |
608 | s->u.pc.ecr = ECR_INIT_VAL; | |
609 | } | |
610 | ||
611 | /* N.B. Parport core code requires that this function not block */ | |
612 | static void parport_mos7715_save_state(struct parport *pp, | |
613 | struct parport_state *s) | |
614 | { | |
615 | struct mos7715_parport *mos_parport; | |
ca09907d | 616 | |
b69578df MD |
617 | spin_lock(&release_lock); |
618 | mos_parport = pp->private_data; | |
619 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
620 | spin_unlock(&release_lock); | |
621 | return; | |
622 | } | |
623 | s->u.pc.ctr = mos_parport->shadowDCR; | |
624 | s->u.pc.ecr = mos_parport->shadowECR; | |
625 | spin_unlock(&release_lock); | |
626 | } | |
627 | ||
628 | /* N.B. Parport core code requires that this function not block */ | |
629 | static void parport_mos7715_restore_state(struct parport *pp, | |
630 | struct parport_state *s) | |
631 | { | |
632 | struct mos7715_parport *mos_parport; | |
ca09907d | 633 | |
b69578df MD |
634 | spin_lock(&release_lock); |
635 | mos_parport = pp->private_data; | |
636 | if (unlikely(mos_parport == NULL)) { /* release called */ | |
637 | spin_unlock(&release_lock); | |
638 | return; | |
639 | } | |
ee5729ec SM |
640 | write_parport_reg_nonblock(mos_parport, MOS7720_DCR, |
641 | mos_parport->shadowDCR); | |
642 | write_parport_reg_nonblock(mos_parport, MOS7720_ECR, | |
643 | mos_parport->shadowECR); | |
b69578df MD |
644 | spin_unlock(&release_lock); |
645 | } | |
646 | ||
647 | static size_t parport_mos7715_write_compat(struct parport *pp, | |
648 | const void *buffer, | |
649 | size_t len, int flags) | |
650 | { | |
651 | int retval; | |
652 | struct mos7715_parport *mos_parport = pp->private_data; | |
653 | int actual_len; | |
ca09907d | 654 | |
b69578df MD |
655 | if (parport_prologue(pp) < 0) |
656 | return 0; | |
657 | mos7715_change_mode(mos_parport, PPF); | |
658 | retval = usb_bulk_msg(mos_parport->serial->dev, | |
659 | usb_sndbulkpipe(mos_parport->serial->dev, 2), | |
660 | (void *)buffer, len, &actual_len, | |
661 | MOS_WDR_TIMEOUT); | |
662 | parport_epilogue(pp); | |
663 | if (retval) { | |
664 | dev_err(&mos_parport->serial->dev->dev, | |
d9a38a87 | 665 | "mos7720: usb_bulk_msg() failed: %d\n", retval); |
b69578df MD |
666 | return 0; |
667 | } | |
668 | return actual_len; | |
669 | } | |
670 | ||
671 | static struct parport_operations parport_mos7715_ops = { | |
672 | .owner = THIS_MODULE, | |
673 | .write_data = parport_mos7715_write_data, | |
674 | .read_data = parport_mos7715_read_data, | |
675 | ||
676 | .write_control = parport_mos7715_write_control, | |
677 | .read_control = parport_mos7715_read_control, | |
678 | .frob_control = parport_mos7715_frob_control, | |
679 | ||
680 | .read_status = parport_mos7715_read_status, | |
681 | ||
682 | .enable_irq = parport_mos7715_enable_irq, | |
683 | .disable_irq = parport_mos7715_disable_irq, | |
684 | ||
685 | .data_forward = parport_mos7715_data_forward, | |
686 | .data_reverse = parport_mos7715_data_reverse, | |
687 | ||
688 | .init_state = parport_mos7715_init_state, | |
689 | .save_state = parport_mos7715_save_state, | |
690 | .restore_state = parport_mos7715_restore_state, | |
691 | ||
692 | .compat_write_data = parport_mos7715_write_compat, | |
693 | ||
694 | .nibble_read_data = parport_ieee1284_read_nibble, | |
695 | .byte_read_data = parport_ieee1284_read_byte, | |
696 | }; | |
697 | ||
698 | /* | |
699 | * Allocate and initialize parallel port control struct, initialize | |
700 | * the parallel port hardware device, and register with the parport subsystem. | |
701 | */ | |
702 | static int mos7715_parport_init(struct usb_serial *serial) | |
703 | { | |
704 | struct mos7715_parport *mos_parport; | |
705 | ||
706 | /* allocate and initialize parallel port control struct */ | |
707 | mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); | |
10c642d0 | 708 | if (!mos_parport) |
b69578df | 709 | return -ENOMEM; |
10c642d0 | 710 | |
b69578df MD |
711 | mos_parport->msg_pending = false; |
712 | kref_init(&mos_parport->ref_count); | |
713 | spin_lock_init(&mos_parport->listlock); | |
714 | INIT_LIST_HEAD(&mos_parport->active_urbs); | |
715 | INIT_LIST_HEAD(&mos_parport->deferred_urbs); | |
716 | usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ | |
717 | mos_parport->serial = serial; | |
718 | tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, | |
719 | (unsigned long) mos_parport); | |
720 | init_completion(&mos_parport->syncmsg_compl); | |
721 | ||
722 | /* cycle parallel port reset bit */ | |
ee5729ec SM |
723 | write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x80); |
724 | write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x00); | |
b69578df MD |
725 | |
726 | /* initialize device registers */ | |
727 | mos_parport->shadowDCR = DCR_INIT_VAL; | |
ee5729ec SM |
728 | write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, |
729 | mos_parport->shadowDCR); | |
b69578df | 730 | mos_parport->shadowECR = ECR_INIT_VAL; |
ee5729ec SM |
731 | write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, |
732 | mos_parport->shadowECR); | |
b69578df MD |
733 | |
734 | /* register with parport core */ | |
735 | mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, | |
736 | PARPORT_DMA_NONE, | |
737 | &parport_mos7715_ops); | |
738 | if (mos_parport->pp == NULL) { | |
739 | dev_err(&serial->interface->dev, | |
740 | "Could not register parport\n"); | |
741 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
742 | return -EIO; | |
743 | } | |
744 | mos_parport->pp->private_data = mos_parport; | |
745 | mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; | |
746 | mos_parport->pp->dev = &serial->interface->dev; | |
747 | parport_announce_port(mos_parport->pp); | |
748 | ||
749 | return 0; | |
750 | } | |
751 | #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ | |
0f64478c GKH |
752 | |
753 | /* | |
754 | * mos7720_interrupt_callback | |
755 | * this is the callback function for when we have received data on the | |
756 | * interrupt endpoint. | |
757 | */ | |
758 | static void mos7720_interrupt_callback(struct urb *urb) | |
759 | { | |
760 | int result; | |
761 | int length; | |
81105984 | 762 | int status = urb->status; |
9eecf808 | 763 | struct device *dev = &urb->dev->dev; |
325b70c2 | 764 | __u8 *data; |
0f64478c GKH |
765 | __u8 sp1; |
766 | __u8 sp2; | |
0f64478c | 767 | |
81105984 | 768 | switch (status) { |
0f64478c GKH |
769 | case 0: |
770 | /* success */ | |
771 | break; | |
772 | case -ECONNRESET: | |
773 | case -ENOENT: | |
774 | case -ESHUTDOWN: | |
775 | /* this urb is terminated, clean up */ | |
9eecf808 | 776 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
0f64478c GKH |
777 | return; |
778 | default: | |
9eecf808 | 779 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
0f64478c GKH |
780 | goto exit; |
781 | } | |
782 | ||
783 | length = urb->actual_length; | |
784 | data = urb->transfer_buffer; | |
785 | ||
786 | /* Moschip get 4 bytes | |
787 | * Byte 1 IIR Port 1 (port.number is 0) | |
788 | * Byte 2 IIR Port 2 (port.number is 1) | |
789 | * Byte 3 -------------- | |
790 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
791 | |
792 | /* the above description is inverted | |
793 | * oneukum 2007-03-14 */ | |
794 | ||
795 | if (unlikely(length != 4)) { | |
9eecf808 | 796 | dev_dbg(dev, "Wrong data !!!\n"); |
0f64478c GKH |
797 | return; |
798 | } | |
799 | ||
325b70c2 ON |
800 | sp1 = data[3]; |
801 | sp2 = data[2]; | |
0f64478c | 802 | |
325b70c2 | 803 | if ((sp1 | sp2) & 0x01) { |
0f64478c | 804 | /* No Interrupt Pending in both the ports */ |
9eecf808 | 805 | dev_dbg(dev, "No Interrupt !!!\n"); |
0f64478c GKH |
806 | } else { |
807 | switch (sp1 & 0x0f) { | |
808 | case SERIAL_IIR_RLS: | |
9eecf808 | 809 | dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
810 | break; |
811 | case SERIAL_IIR_CTI: | |
9eecf808 | 812 | dev_dbg(dev, "Serial Port 1: Receiver time out\n"); |
0f64478c GKH |
813 | break; |
814 | case SERIAL_IIR_MS: | |
9eecf808 | 815 | /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ |
0f64478c GKH |
816 | break; |
817 | } | |
818 | ||
819 | switch (sp2 & 0x0f) { | |
820 | case SERIAL_IIR_RLS: | |
9eecf808 | 821 | dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); |
0f64478c GKH |
822 | break; |
823 | case SERIAL_IIR_CTI: | |
9eecf808 | 824 | dev_dbg(dev, "Serial Port 2: Receiver time out\n"); |
0f64478c GKH |
825 | break; |
826 | case SERIAL_IIR_MS: | |
9eecf808 | 827 | /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ |
0f64478c GKH |
828 | break; |
829 | } | |
830 | } | |
831 | ||
832 | exit: | |
833 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
834 | if (result) | |
9eecf808 | 835 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
0f64478c GKH |
836 | } |
837 | ||
fb088e33 MD |
838 | /* |
839 | * mos7715_interrupt_callback | |
840 | * this is the 7715's callback function for when we have received data on | |
841 | * the interrupt endpoint. | |
842 | */ | |
843 | static void mos7715_interrupt_callback(struct urb *urb) | |
844 | { | |
845 | int result; | |
846 | int length; | |
847 | int status = urb->status; | |
9eecf808 | 848 | struct device *dev = &urb->dev->dev; |
fb088e33 MD |
849 | __u8 *data; |
850 | __u8 iir; | |
851 | ||
852 | switch (status) { | |
853 | case 0: | |
854 | /* success */ | |
855 | break; | |
856 | case -ECONNRESET: | |
857 | case -ENOENT: | |
858 | case -ESHUTDOWN: | |
b69578df | 859 | case -ENODEV: |
fb088e33 | 860 | /* this urb is terminated, clean up */ |
9eecf808 | 861 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
fb088e33 MD |
862 | return; |
863 | default: | |
9eecf808 | 864 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
fb088e33 MD |
865 | goto exit; |
866 | } | |
867 | ||
868 | length = urb->actual_length; | |
869 | data = urb->transfer_buffer; | |
870 | ||
871 | /* Structure of data from 7715 device: | |
872 | * Byte 1: IIR serial Port | |
873 | * Byte 2: unused | |
874 | * Byte 2: DSR parallel port | |
875 | * Byte 4: FIFO status for both */ | |
876 | ||
877 | if (unlikely(length != 4)) { | |
9eecf808 | 878 | dev_dbg(dev, "Wrong data !!!\n"); |
fb088e33 MD |
879 | return; |
880 | } | |
881 | ||
882 | iir = data[0]; | |
883 | if (!(iir & 0x01)) { /* serial port interrupt pending */ | |
884 | switch (iir & 0x0f) { | |
885 | case SERIAL_IIR_RLS: | |
d9a38a87 | 886 | dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n"); |
fb088e33 MD |
887 | break; |
888 | case SERIAL_IIR_CTI: | |
9eecf808 | 889 | dev_dbg(dev, "Serial Port: Receiver time out\n"); |
fb088e33 MD |
890 | break; |
891 | case SERIAL_IIR_MS: | |
9eecf808 | 892 | /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ |
fb088e33 MD |
893 | break; |
894 | } | |
895 | } | |
896 | ||
b69578df MD |
897 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
898 | { /* update local copy of DSR reg */ | |
899 | struct usb_serial_port *port = urb->context; | |
900 | struct mos7715_parport *mos_parport = port->serial->private; | |
901 | if (unlikely(mos_parport == NULL)) | |
902 | return; | |
903 | atomic_set(&mos_parport->shadowDSR, data[2]); | |
904 | } | |
905 | #endif | |
906 | ||
fb088e33 MD |
907 | exit: |
908 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
909 | if (result) | |
9eecf808 | 910 | dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); |
fb088e33 MD |
911 | } |
912 | ||
0f64478c GKH |
913 | /* |
914 | * mos7720_bulk_in_callback | |
915 | * this is the callback function for when we have received data on the | |
916 | * bulk in endpoint. | |
917 | */ | |
918 | static void mos7720_bulk_in_callback(struct urb *urb) | |
919 | { | |
81105984 | 920 | int retval; |
0f64478c GKH |
921 | unsigned char *data ; |
922 | struct usb_serial_port *port; | |
81105984 | 923 | int status = urb->status; |
0f64478c | 924 | |
81105984 | 925 | if (status) { |
9eecf808 | 926 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
0f64478c GKH |
927 | return; |
928 | } | |
929 | ||
b69578df | 930 | port = urb->context; |
0f64478c | 931 | |
9eecf808 | 932 | dev_dbg(&port->dev, "Entering...%s\n", __func__); |
0f64478c GKH |
933 | |
934 | data = urb->transfer_buffer; | |
935 | ||
2e124b4a | 936 | if (urb->actual_length) { |
05c7cd39 | 937 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 938 | tty_flip_buffer_push(&port->port); |
0f64478c GKH |
939 | } |
940 | ||
0f64478c | 941 | if (port->read_urb->status != -EINPROGRESS) { |
81105984 GKH |
942 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
943 | if (retval) | |
9eecf808 | 944 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
0f64478c GKH |
945 | } |
946 | } | |
947 | ||
948 | /* | |
949 | * mos7720_bulk_out_data_callback | |
950 | * this is the callback function for when we have finished sending serial | |
951 | * data on the bulk out endpoint. | |
952 | */ | |
953 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
954 | { | |
955 | struct moschip_port *mos7720_port; | |
81105984 | 956 | int status = urb->status; |
0f64478c | 957 | |
81105984 | 958 | if (status) { |
9eecf808 | 959 | dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); |
0f64478c GKH |
960 | return; |
961 | } | |
962 | ||
963 | mos7720_port = urb->context; | |
964 | if (!mos7720_port) { | |
9eecf808 | 965 | dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); |
0f64478c GKH |
966 | return ; |
967 | } | |
968 | ||
6aad04f2 JS |
969 | if (mos7720_port->open) |
970 | tty_port_tty_wakeup(&mos7720_port->port->port); | |
0f64478c GKH |
971 | } |
972 | ||
fb088e33 MD |
973 | /* |
974 | * mos77xx_probe | |
975 | * this function installs the appropriate read interrupt endpoint callback | |
976 | * depending on whether the device is a 7720 or 7715, thus avoiding costly | |
977 | * run-time checks in the high-frequency callback routine itself. | |
978 | */ | |
979 | static int mos77xx_probe(struct usb_serial *serial, | |
980 | const struct usb_device_id *id) | |
981 | { | |
982 | if (id->idProduct == MOSCHIP_DEVICE_ID_7715) | |
983 | moschip7720_2port_driver.read_int_callback = | |
984 | mos7715_interrupt_callback; | |
985 | else | |
986 | moschip7720_2port_driver.read_int_callback = | |
987 | mos7720_interrupt_callback; | |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
992 | static int mos77xx_calc_num_ports(struct usb_serial *serial) | |
993 | { | |
994 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
995 | if (product == MOSCHIP_DEVICE_ID_7715) | |
996 | return 1; | |
997 | ||
998 | return 2; | |
999 | } | |
1000 | ||
a509a7e4 | 1001 | static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
0f64478c GKH |
1002 | { |
1003 | struct usb_serial *serial; | |
0f64478c | 1004 | struct urb *urb; |
0f64478c GKH |
1005 | struct moschip_port *mos7720_port; |
1006 | int response; | |
1007 | int port_number; | |
63b91767 | 1008 | __u8 data; |
fe4b65ec | 1009 | int allocated_urbs = 0; |
0f64478c GKH |
1010 | int j; |
1011 | ||
1012 | serial = port->serial; | |
1013 | ||
1014 | mos7720_port = usb_get_serial_port_data(port); | |
1015 | if (mos7720_port == NULL) | |
1016 | return -ENODEV; | |
1017 | ||
0f64478c GKH |
1018 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
1019 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
1020 | ||
1021 | /* Initialising the write urb pool */ | |
1022 | for (j = 0; j < NUM_URBS; ++j) { | |
4da1a17d | 1023 | urb = usb_alloc_urb(0, GFP_KERNEL); |
0f64478c | 1024 | mos7720_port->write_urb_pool[j] = urb; |
10c642d0 | 1025 | if (!urb) |
0f64478c | 1026 | continue; |
0f64478c GKH |
1027 | |
1028 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
1029 | GFP_KERNEL); | |
1030 | if (!urb->transfer_buffer) { | |
fe4b65ec ON |
1031 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
1032 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
1033 | continue; |
1034 | } | |
fe4b65ec | 1035 | allocated_urbs++; |
0f64478c GKH |
1036 | } |
1037 | ||
fe4b65ec ON |
1038 | if (!allocated_urbs) |
1039 | return -ENOMEM; | |
1040 | ||
0f64478c GKH |
1041 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
1042 | * | |
1043 | * Register Index | |
ee5729ec SM |
1044 | * 0 : MOS7720_THR/MOS7720_RHR |
1045 | * 1 : MOS7720_IER | |
1046 | * 2 : MOS7720_FCR | |
1047 | * 3 : MOS7720_LCR | |
1048 | * 4 : MOS7720_MCR | |
1049 | * 5 : MOS7720_LSR | |
1050 | * 6 : MOS7720_MSR | |
1051 | * 7 : MOS7720_SPR | |
0f64478c GKH |
1052 | * |
1053 | * 0x08 : SP1/2 Control Reg | |
1054 | */ | |
1143832e | 1055 | port_number = port->port_number; |
ee5729ec | 1056 | read_mos_reg(serial, port_number, MOS7720_LSR, &data); |
63b91767 | 1057 | |
9eecf808 | 1058 | dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); |
0f64478c | 1059 | |
ee5729ec SM |
1060 | write_mos_reg(serial, dummy, MOS7720_SP1_REG, 0x02); |
1061 | write_mos_reg(serial, dummy, MOS7720_SP2_REG, 0x02); | |
0f64478c | 1062 | |
ee5729ec SM |
1063 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1064 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
0f64478c | 1065 | |
ee5729ec | 1066 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); |
63b91767 | 1067 | mos7720_port->shadowLCR = 0x03; |
ee5729ec SM |
1068 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1069 | mos7720_port->shadowLCR); | |
63b91767 | 1070 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1071 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1072 | mos7720_port->shadowMCR); | |
0f64478c | 1073 | |
ee5729ec SM |
1074 | write_mos_reg(serial, port_number, MOS7720_SP_CONTROL_REG, 0x00); |
1075 | read_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, &data); | |
1143832e | 1076 | data = data | (port->port_number + 1); |
ee5729ec | 1077 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, data); |
63b91767 | 1078 | mos7720_port->shadowLCR = 0x83; |
ee5729ec SM |
1079 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1080 | mos7720_port->shadowLCR); | |
1081 | write_mos_reg(serial, port_number, MOS7720_THR, 0x0c); | |
1082 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); | |
63b91767 | 1083 | mos7720_port->shadowLCR = 0x03; |
ee5729ec SM |
1084 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1085 | mos7720_port->shadowLCR); | |
1086 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); | |
0f64478c | 1087 | |
0f64478c GKH |
1088 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1089 | if (response) | |
4da1a17d AC |
1090 | dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
1091 | __func__, response); | |
0f64478c | 1092 | |
0f64478c GKH |
1093 | /* initialize our port settings */ |
1094 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
1095 | ||
1096 | /* send a open port command */ | |
1097 | mos7720_port->open = 1; | |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * mos7720_chars_in_buffer | |
1104 | * this function is called by the tty driver when it wants to know how many | |
1105 | * bytes of data we currently have outstanding in the port (data that has | |
1106 | * been written, but hasn't made it out the port yet) | |
1107 | * If successful, we return the number of bytes left to be written in the | |
1108 | * system, | |
1109 | * Otherwise we return a negative error number. | |
1110 | */ | |
95da310e | 1111 | static int mos7720_chars_in_buffer(struct tty_struct *tty) |
0f64478c | 1112 | { |
95da310e | 1113 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1114 | int i; |
1115 | int chars = 0; | |
1116 | struct moschip_port *mos7720_port; | |
1117 | ||
0f64478c | 1118 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1119 | if (mos7720_port == NULL) |
23198fda | 1120 | return 0; |
0f64478c GKH |
1121 | |
1122 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1123 | if (mos7720_port->write_urb_pool[i] && |
1124 | mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
0f64478c GKH |
1125 | chars += URB_TRANSFER_BUFFER_SIZE; |
1126 | } | |
9eecf808 | 1127 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0f64478c GKH |
1128 | return chars; |
1129 | } | |
1130 | ||
335f8514 | 1131 | static void mos7720_close(struct usb_serial_port *port) |
0f64478c GKH |
1132 | { |
1133 | struct usb_serial *serial; | |
1134 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1135 | int j; |
1136 | ||
0f64478c GKH |
1137 | serial = port->serial; |
1138 | ||
1139 | mos7720_port = usb_get_serial_port_data(port); | |
1140 | if (mos7720_port == NULL) | |
1141 | return; | |
1142 | ||
1143 | for (j = 0; j < NUM_URBS; ++j) | |
1144 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
1145 | ||
1146 | /* Freeing Write URBs */ | |
1147 | for (j = 0; j < NUM_URBS; ++j) { | |
1148 | if (mos7720_port->write_urb_pool[j]) { | |
1149 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
1150 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 | 1155 | * and interrupt read if they exists, otherwise nop */ |
a1cd7e99 | 1156 | usb_kill_urb(port->write_urb); |
a1cd7e99 ON |
1157 | usb_kill_urb(port->read_urb); |
1158 | ||
ee5729ec SM |
1159 | write_mos_reg(serial, port->port_number, MOS7720_MCR, 0x00); |
1160 | write_mos_reg(serial, port->port_number, MOS7720_IER, 0x00); | |
cf41aa9e | 1161 | |
0f64478c | 1162 | mos7720_port->open = 0; |
0f64478c GKH |
1163 | } |
1164 | ||
95da310e | 1165 | static void mos7720_break(struct tty_struct *tty, int break_state) |
0f64478c | 1166 | { |
95da310e | 1167 | struct usb_serial_port *port = tty->driver_data; |
4da1a17d | 1168 | unsigned char data; |
0f64478c GKH |
1169 | struct usb_serial *serial; |
1170 | struct moschip_port *mos7720_port; | |
1171 | ||
0f64478c GKH |
1172 | serial = port->serial; |
1173 | ||
1174 | mos7720_port = usb_get_serial_port_data(port); | |
1175 | if (mos7720_port == NULL) | |
1176 | return; | |
1177 | ||
1178 | if (break_state == -1) | |
1179 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
1180 | else | |
1181 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
1182 | ||
1183 | mos7720_port->shadowLCR = data; | |
ee5729ec SM |
1184 | write_mos_reg(serial, port->port_number, MOS7720_LCR, |
1185 | mos7720_port->shadowLCR); | |
0f64478c GKH |
1186 | } |
1187 | ||
1188 | /* | |
1189 | * mos7720_write_room | |
1190 | * this function is called by the tty driver when it wants to know how many | |
1191 | * bytes of data we can accept for a specific port. | |
1192 | * If successful, we return the amount of room that we have for this port | |
1193 | * Otherwise we return a negative error number. | |
1194 | */ | |
95da310e | 1195 | static int mos7720_write_room(struct tty_struct *tty) |
0f64478c | 1196 | { |
95da310e | 1197 | struct usb_serial_port *port = tty->driver_data; |
0f64478c GKH |
1198 | struct moschip_port *mos7720_port; |
1199 | int room = 0; | |
1200 | int i; | |
1201 | ||
0f64478c | 1202 | mos7720_port = usb_get_serial_port_data(port); |
9eecf808 | 1203 | if (mos7720_port == NULL) |
0f64478c | 1204 | return -ENODEV; |
0f64478c | 1205 | |
a5b6f60c | 1206 | /* FIXME: Locking */ |
0f64478c | 1207 | for (i = 0; i < NUM_URBS; ++i) { |
4da1a17d AC |
1208 | if (mos7720_port->write_urb_pool[i] && |
1209 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
0f64478c GKH |
1210 | room += URB_TRANSFER_BUFFER_SIZE; |
1211 | } | |
1212 | ||
9eecf808 | 1213 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
0f64478c GKH |
1214 | return room; |
1215 | } | |
1216 | ||
95da310e AC |
1217 | static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
1218 | const unsigned char *data, int count) | |
0f64478c GKH |
1219 | { |
1220 | int status; | |
1221 | int i; | |
1222 | int bytes_sent = 0; | |
1223 | int transfer_size; | |
1224 | ||
1225 | struct moschip_port *mos7720_port; | |
1226 | struct usb_serial *serial; | |
1227 | struct urb *urb; | |
1228 | const unsigned char *current_position = data; | |
1229 | ||
0f64478c GKH |
1230 | serial = port->serial; |
1231 | ||
1232 | mos7720_port = usb_get_serial_port_data(port); | |
9eecf808 | 1233 | if (mos7720_port == NULL) |
0f64478c | 1234 | return -ENODEV; |
0f64478c GKH |
1235 | |
1236 | /* try to find a free urb in the list */ | |
1237 | urb = NULL; | |
1238 | ||
1239 | for (i = 0; i < NUM_URBS; ++i) { | |
4da1a17d AC |
1240 | if (mos7720_port->write_urb_pool[i] && |
1241 | mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
0f64478c | 1242 | urb = mos7720_port->write_urb_pool[i]; |
9eecf808 | 1243 | dev_dbg(&port->dev, "URB:%d\n", i); |
0f64478c GKH |
1244 | break; |
1245 | } | |
1246 | } | |
1247 | ||
1248 | if (urb == NULL) { | |
9eecf808 | 1249 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
0f64478c GKH |
1250 | goto exit; |
1251 | } | |
1252 | ||
1253 | if (urb->transfer_buffer == NULL) { | |
1254 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
5a5a1d61 | 1255 | GFP_ATOMIC); |
10c642d0 | 1256 | if (!urb->transfer_buffer) |
0f64478c | 1257 | goto exit; |
0f64478c | 1258 | } |
4da1a17d | 1259 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
0f64478c GKH |
1260 | |
1261 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
59d33f2f | 1262 | usb_serial_debug_data(&port->dev, __func__, transfer_size, |
0f64478c GKH |
1263 | urb->transfer_buffer); |
1264 | ||
1265 | /* fill urb with data and submit */ | |
1266 | usb_fill_bulk_urb(urb, serial->dev, | |
1267 | usb_sndbulkpipe(serial->dev, | |
4da1a17d | 1268 | port->bulk_out_endpointAddress), |
0f64478c GKH |
1269 | urb->transfer_buffer, transfer_size, |
1270 | mos7720_bulk_out_data_callback, mos7720_port); | |
1271 | ||
1272 | /* send it down the pipe */ | |
4da1a17d | 1273 | status = usb_submit_urb(urb, GFP_ATOMIC); |
0f64478c | 1274 | if (status) { |
22a416c4 | 1275 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1276 | "with status = %d\n", __func__, status); |
0f64478c GKH |
1277 | bytes_sent = status; |
1278 | goto exit; | |
1279 | } | |
1280 | bytes_sent = transfer_size; | |
1281 | ||
1282 | exit: | |
1283 | return bytes_sent; | |
1284 | } | |
1285 | ||
95da310e | 1286 | static void mos7720_throttle(struct tty_struct *tty) |
0f64478c | 1287 | { |
95da310e | 1288 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1289 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1290 | int status; |
1291 | ||
0f64478c GKH |
1292 | mos7720_port = usb_get_serial_port_data(port); |
1293 | ||
1294 | if (mos7720_port == NULL) | |
1295 | return; | |
1296 | ||
1297 | if (!mos7720_port->open) { | |
9eecf808 | 1298 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1299 | return; |
1300 | } | |
1301 | ||
0f64478c GKH |
1302 | /* if we are implementing XON/XOFF, send the stop character */ |
1303 | if (I_IXOFF(tty)) { | |
1304 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e | 1305 | status = mos7720_write(tty, port, &stop_char, 1); |
0f64478c GKH |
1306 | if (status <= 0) |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | /* if we are implementing RTS/CTS, toggle that line */ | |
9db276f8 | 1311 | if (C_CRTSCTS(tty)) { |
0f64478c | 1312 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
ee5729ec | 1313 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1314 | mos7720_port->shadowMCR); |
0f64478c GKH |
1315 | } |
1316 | } | |
1317 | ||
95da310e | 1318 | static void mos7720_unthrottle(struct tty_struct *tty) |
0f64478c | 1319 | { |
95da310e | 1320 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1321 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
95da310e | 1322 | int status; |
0f64478c GKH |
1323 | |
1324 | if (mos7720_port == NULL) | |
1325 | return; | |
1326 | ||
1327 | if (!mos7720_port->open) { | |
9eecf808 | 1328 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1329 | return; |
1330 | } | |
1331 | ||
0f64478c GKH |
1332 | /* if we are implementing XON/XOFF, send the start character */ |
1333 | if (I_IXOFF(tty)) { | |
1334 | unsigned char start_char = START_CHAR(tty); | |
95da310e | 1335 | status = mos7720_write(tty, port, &start_char, 1); |
0f64478c GKH |
1336 | if (status <= 0) |
1337 | return; | |
1338 | } | |
1339 | ||
1340 | /* if we are implementing RTS/CTS, toggle that line */ | |
9db276f8 | 1341 | if (C_CRTSCTS(tty)) { |
0f64478c | 1342 | mos7720_port->shadowMCR |= UART_MCR_RTS; |
ee5729ec | 1343 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1344 | mos7720_port->shadowMCR); |
0f64478c GKH |
1345 | } |
1346 | } | |
1347 | ||
b69578df | 1348 | /* FIXME: this function does not work */ |
0f64478c GKH |
1349 | static int set_higher_rates(struct moschip_port *mos7720_port, |
1350 | unsigned int baud) | |
1351 | { | |
0f64478c GKH |
1352 | struct usb_serial_port *port; |
1353 | struct usb_serial *serial; | |
1354 | int port_number; | |
63b91767 | 1355 | enum mos_regs sp_reg; |
0f64478c GKH |
1356 | if (mos7720_port == NULL) |
1357 | return -EINVAL; | |
1358 | ||
1359 | port = mos7720_port->port; | |
1360 | serial = port->serial; | |
1361 | ||
4da1a17d AC |
1362 | /*********************************************** |
1363 | * Init Sequence for higher rates | |
1364 | ***********************************************/ | |
9eecf808 | 1365 | dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); |
1143832e | 1366 | port_number = port->port_number; |
0f64478c | 1367 | |
ee5729ec SM |
1368 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1369 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
1370 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); | |
63b91767 | 1371 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1372 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1373 | mos7720_port->shadowMCR); | |
1374 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x00); | |
0f64478c | 1375 | |
4da1a17d AC |
1376 | /*********************************************** |
1377 | * Set for higher rates * | |
1378 | ***********************************************/ | |
b69578df | 1379 | /* writing baud rate verbatum into uart clock field clearly not right */ |
63b91767 | 1380 | if (port_number == 0) |
ee5729ec | 1381 | sp_reg = MOS7720_SP1_REG; |
63b91767 | 1382 | else |
ee5729ec | 1383 | sp_reg = MOS7720_SP2_REG; |
63b91767 | 1384 | write_mos_reg(serial, dummy, sp_reg, baud * 0x10); |
ee5729ec | 1385 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x03); |
63b91767 | 1386 | mos7720_port->shadowMCR = 0x2b; |
ee5729ec SM |
1387 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1388 | mos7720_port->shadowMCR); | |
0f64478c | 1389 | |
4da1a17d AC |
1390 | /*********************************************** |
1391 | * Set DLL/DLM | |
1392 | ***********************************************/ | |
63b91767 | 1393 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
ee5729ec SM |
1394 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1395 | mos7720_port->shadowLCR); | |
1396 | write_mos_reg(serial, port_number, MOS7720_DLL, 0x01); | |
1397 | write_mos_reg(serial, port_number, MOS7720_DLM, 0x00); | |
63b91767 | 1398 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
ee5729ec SM |
1399 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1400 | mos7720_port->shadowLCR); | |
0f64478c GKH |
1401 | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | /* baud rate information */ | |
4da1a17d | 1406 | struct divisor_table_entry { |
0f64478c GKH |
1407 | __u32 baudrate; |
1408 | __u16 divisor; | |
1409 | }; | |
1410 | ||
1411 | /* Define table of divisors for moschip 7720 hardware * | |
1412 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
1413 | * MCR.7 = 0. */ | |
1414 | static struct divisor_table_entry divisor_table[] = { | |
1415 | { 50, 2304}, | |
1416 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
1417 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
1418 | { 150, 768}, | |
1419 | { 300, 384}, | |
1420 | { 600, 192}, | |
1421 | { 1200, 96}, | |
1422 | { 1800, 64}, | |
1423 | { 2400, 48}, | |
1424 | { 4800, 24}, | |
1425 | { 7200, 16}, | |
1426 | { 9600, 12}, | |
1427 | { 19200, 6}, | |
1428 | { 38400, 3}, | |
1429 | { 57600, 2}, | |
1430 | { 115200, 1}, | |
1431 | }; | |
1432 | ||
1433 | /***************************************************************************** | |
1434 | * calc_baud_rate_divisor | |
1435 | * this function calculates the proper baud rate divisor for the specified | |
1436 | * baud rate. | |
1437 | *****************************************************************************/ | |
9eecf808 | 1438 | static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) |
0f64478c GKH |
1439 | { |
1440 | int i; | |
1441 | __u16 custom; | |
1442 | __u16 round1; | |
1443 | __u16 round; | |
1444 | ||
1445 | ||
9eecf808 | 1446 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); |
0f64478c GKH |
1447 | |
1448 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
1449 | if (divisor_table[i].baudrate == baudrate) { | |
1450 | *divisor = divisor_table[i].divisor; | |
1451 | return 0; | |
1452 | } | |
1453 | } | |
1454 | ||
4da1a17d AC |
1455 | /* After trying for all the standard baud rates * |
1456 | * Try calculating the divisor for this baud rate */ | |
0f64478c GKH |
1457 | if (baudrate > 75 && baudrate < 230400) { |
1458 | /* get the divisor */ | |
1459 | custom = (__u16)(230400L / baudrate); | |
1460 | ||
1461 | /* Check for round off */ | |
1462 | round1 = (__u16)(2304000L / baudrate); | |
1463 | round = (__u16)(round1 - (custom * 10)); | |
1464 | if (round > 4) | |
1465 | custom++; | |
1466 | *divisor = custom; | |
1467 | ||
9eecf808 | 1468 | dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); |
0f64478c GKH |
1469 | return 0; |
1470 | } | |
1471 | ||
9eecf808 | 1472 | dev_dbg(&port->dev, "Baud calculation Failed...\n"); |
0f64478c GKH |
1473 | return -EINVAL; |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * send_cmd_write_baud_rate | |
1478 | * this function sends the proper command to change the baud rate of the | |
1479 | * specified port. | |
1480 | */ | |
1481 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
1482 | int baudrate) | |
1483 | { | |
1484 | struct usb_serial_port *port; | |
1485 | struct usb_serial *serial; | |
1486 | int divisor; | |
1487 | int status; | |
0f64478c GKH |
1488 | unsigned char number; |
1489 | ||
1490 | if (mos7720_port == NULL) | |
1491 | return -1; | |
1492 | ||
1493 | port = mos7720_port->port; | |
1494 | serial = port->serial; | |
1495 | ||
1143832e | 1496 | number = port->port_number; |
9eecf808 | 1497 | dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); |
0f64478c | 1498 | |
4da1a17d | 1499 | /* Calculate the Divisor */ |
9eecf808 | 1500 | status = calc_baud_rate_divisor(port, baudrate, &divisor); |
0f64478c | 1501 | if (status) { |
194343d9 | 1502 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
0f64478c GKH |
1503 | return status; |
1504 | } | |
1505 | ||
4da1a17d | 1506 | /* Enable access to divisor latch */ |
63b91767 | 1507 | mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
ee5729ec | 1508 | write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1509 | |
1510 | /* Write the divisor */ | |
ee5729ec SM |
1511 | write_mos_reg(serial, number, MOS7720_DLL, (__u8)(divisor & 0xff)); |
1512 | write_mos_reg(serial, number, MOS7720_DLM, | |
1513 | (__u8)((divisor & 0xff00) >> 8)); | |
0f64478c | 1514 | |
4da1a17d | 1515 | /* Disable access to divisor latch */ |
63b91767 | 1516 | mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
ee5729ec | 1517 | write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); |
0f64478c GKH |
1518 | |
1519 | return status; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * change_port_settings | |
1524 | * This routine is called to set the UART on the device to match | |
1525 | * the specified new settings. | |
1526 | */ | |
95da310e AC |
1527 | static void change_port_settings(struct tty_struct *tty, |
1528 | struct moschip_port *mos7720_port, | |
606d099c | 1529 | struct ktermios *old_termios) |
0f64478c GKH |
1530 | { |
1531 | struct usb_serial_port *port; | |
1532 | struct usb_serial *serial; | |
0f64478c GKH |
1533 | int baud; |
1534 | unsigned cflag; | |
1535 | unsigned iflag; | |
1536 | __u8 mask = 0xff; | |
1537 | __u8 lData; | |
1538 | __u8 lParity; | |
1539 | __u8 lStop; | |
1540 | int status; | |
1541 | int port_number; | |
0f64478c GKH |
1542 | |
1543 | if (mos7720_port == NULL) | |
1544 | return ; | |
1545 | ||
1546 | port = mos7720_port->port; | |
1547 | serial = port->serial; | |
1143832e | 1548 | port_number = port->port_number; |
0f64478c | 1549 | |
0f64478c | 1550 | if (!mos7720_port->open) { |
9eecf808 | 1551 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1552 | return; |
1553 | } | |
1554 | ||
0f64478c GKH |
1555 | lData = UART_LCR_WLEN8; |
1556 | lStop = 0x00; /* 1 stop bit */ | |
1557 | lParity = 0x00; /* No parity */ | |
1558 | ||
adc8d746 AC |
1559 | cflag = tty->termios.c_cflag; |
1560 | iflag = tty->termios.c_iflag; | |
0f64478c GKH |
1561 | |
1562 | /* Change the number of bits */ | |
1563 | switch (cflag & CSIZE) { | |
1564 | case CS5: | |
1565 | lData = UART_LCR_WLEN5; | |
1566 | mask = 0x1f; | |
1567 | break; | |
1568 | ||
1569 | case CS6: | |
1570 | lData = UART_LCR_WLEN6; | |
1571 | mask = 0x3f; | |
1572 | break; | |
1573 | ||
1574 | case CS7: | |
1575 | lData = UART_LCR_WLEN7; | |
1576 | mask = 0x7f; | |
1577 | break; | |
1578 | default: | |
1579 | case CS8: | |
1580 | lData = UART_LCR_WLEN8; | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | /* Change the Parity bit */ | |
1585 | if (cflag & PARENB) { | |
1586 | if (cflag & PARODD) { | |
1587 | lParity = UART_LCR_PARITY; | |
9eecf808 | 1588 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
0f64478c GKH |
1589 | } else { |
1590 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
9eecf808 | 1591 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
0f64478c GKH |
1592 | } |
1593 | ||
1594 | } else { | |
9eecf808 | 1595 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
0f64478c GKH |
1596 | } |
1597 | ||
1598 | if (cflag & CMSPAR) | |
1599 | lParity = lParity | 0x20; | |
1600 | ||
1601 | /* Change the Stop bit */ | |
1602 | if (cflag & CSTOPB) { | |
1603 | lStop = UART_LCR_STOP; | |
9eecf808 | 1604 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
0f64478c GKH |
1605 | } else { |
1606 | lStop = 0x00; | |
9eecf808 | 1607 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
0f64478c GKH |
1608 | } |
1609 | ||
1610 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1611 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1612 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1613 | ||
1614 | /* Update the LCR with the correct value */ | |
4da1a17d | 1615 | mos7720_port->shadowLCR &= |
63b91767 | 1616 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
0f64478c GKH |
1617 | mos7720_port->shadowLCR |= (lData | lParity | lStop); |
1618 | ||
1619 | ||
1620 | /* Disable Interrupts */ | |
ee5729ec SM |
1621 | write_mos_reg(serial, port_number, MOS7720_IER, 0x00); |
1622 | write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); | |
1623 | write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); | |
0f64478c GKH |
1624 | |
1625 | /* Send the updated LCR value to the mos7720 */ | |
ee5729ec SM |
1626 | write_mos_reg(serial, port_number, MOS7720_LCR, |
1627 | mos7720_port->shadowLCR); | |
63b91767 | 1628 | mos7720_port->shadowMCR = 0x0b; |
ee5729ec SM |
1629 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1630 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1631 | |
1632 | /* set up the MCR register and send it to the mos7720 */ | |
1633 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1634 | if (cflag & CBAUD) | |
1635 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1636 | ||
1637 | if (cflag & CRTSCTS) { | |
1638 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
4da1a17d AC |
1639 | /* To set hardware flow control to the specified * |
1640 | * serial port, in SP1/2_CONTROL_REG */ | |
a26f009a | 1641 | if (port_number) |
ee5729ec SM |
1642 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, |
1643 | 0x01); | |
63b91767 | 1644 | else |
ee5729ec SM |
1645 | write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, |
1646 | 0x02); | |
63b91767 MD |
1647 | |
1648 | } else | |
0f64478c | 1649 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
0f64478c | 1650 | |
ee5729ec SM |
1651 | write_mos_reg(serial, port_number, MOS7720_MCR, |
1652 | mos7720_port->shadowMCR); | |
0f64478c GKH |
1653 | |
1654 | /* Determine divisor based on baud rate */ | |
1655 | baud = tty_get_baud_rate(tty); | |
1656 | if (!baud) { | |
1657 | /* pick a default, any default... */ | |
9eecf808 | 1658 | dev_dbg(&port->dev, "Picked default baud...\n"); |
0f64478c GKH |
1659 | baud = 9600; |
1660 | } | |
1661 | ||
1662 | if (baud >= 230400) { | |
1663 | set_higher_rates(mos7720_port, baud); | |
1664 | /* Enable Interrupts */ | |
ee5729ec | 1665 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); |
0f64478c GKH |
1666 | return; |
1667 | } | |
1668 | ||
9eecf808 | 1669 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
0f64478c | 1670 | status = send_cmd_write_baud_rate(mos7720_port, baud); |
65d063ab AC |
1671 | /* FIXME: needs to write actual resulting baud back not just |
1672 | blindly do so */ | |
1673 | if (cflag & CBAUD) | |
1674 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c | 1675 | /* Enable Interrupts */ |
ee5729ec | 1676 | write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); |
0f64478c GKH |
1677 | |
1678 | if (port->read_urb->status != -EINPROGRESS) { | |
1dbd11be | 1679 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
0f64478c | 1680 | if (status) |
9eecf808 | 1681 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1682 | } |
0f64478c GKH |
1683 | } |
1684 | ||
1685 | /* | |
1686 | * mos7720_set_termios | |
1687 | * this function is called by the tty driver when it wants to change the | |
1688 | * termios structure. | |
1689 | */ | |
95da310e AC |
1690 | static void mos7720_set_termios(struct tty_struct *tty, |
1691 | struct usb_serial_port *port, struct ktermios *old_termios) | |
0f64478c GKH |
1692 | { |
1693 | int status; | |
1694 | unsigned int cflag; | |
1695 | struct usb_serial *serial; | |
1696 | struct moschip_port *mos7720_port; | |
0f64478c GKH |
1697 | |
1698 | serial = port->serial; | |
1699 | ||
1700 | mos7720_port = usb_get_serial_port_data(port); | |
1701 | ||
1702 | if (mos7720_port == NULL) | |
1703 | return; | |
1704 | ||
0f64478c | 1705 | if (!mos7720_port->open) { |
9eecf808 | 1706 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
0f64478c GKH |
1707 | return; |
1708 | } | |
1709 | ||
9eecf808 | 1710 | dev_dbg(&port->dev, "setting termios - ASPIRE\n"); |
0f64478c | 1711 | |
adc8d746 | 1712 | cflag = tty->termios.c_cflag; |
0f64478c | 1713 | |
9eecf808 | 1714 | dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__, |
d9a80746 | 1715 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
0f64478c | 1716 | |
9eecf808 GKH |
1717 | dev_dbg(&port->dev, "%s - old cflag %08x old iflag %08x\n", __func__, |
1718 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1719 | |
1720 | /* change the port settings to the new ones specified */ | |
95da310e | 1721 | change_port_settings(tty, mos7720_port, old_termios); |
0f64478c | 1722 | |
4da1a17d | 1723 | if (port->read_urb->status != -EINPROGRESS) { |
1dbd11be | 1724 | status = usb_submit_urb(port->read_urb, GFP_KERNEL); |
0f64478c | 1725 | if (status) |
9eecf808 | 1726 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); |
0f64478c | 1727 | } |
0f64478c GKH |
1728 | } |
1729 | ||
1730 | /* | |
1731 | * get_lsr_info - get line status register info | |
1732 | * | |
1733 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1734 | * is emptied. On bus types like RS485, the transmitter must | |
1735 | * release the bus after transmitting. This must be done when | |
1736 | * the transmit shift register is empty, not be done when the | |
1737 | * transmit holding register is empty. This functionality | |
1738 | * allows an RS485 driver to be written in user space. | |
1739 | */ | |
4da1a17d AC |
1740 | static int get_lsr_info(struct tty_struct *tty, |
1741 | struct moschip_port *mos7720_port, unsigned int __user *value) | |
0f64478c | 1742 | { |
2f9ea55c | 1743 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1744 | unsigned int result = 0; |
2f9ea55c | 1745 | unsigned char data = 0; |
1143832e | 1746 | int port_number = port->port_number; |
2f9ea55c | 1747 | int count; |
0f64478c | 1748 | |
95da310e | 1749 | count = mos7720_chars_in_buffer(tty); |
0f64478c | 1750 | if (count == 0) { |
ee5729ec | 1751 | read_mos_reg(port->serial, port_number, MOS7720_LSR, &data); |
2f9ea55c KS |
1752 | if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
1753 | == (UART_LSR_TEMT | UART_LSR_THRE)) { | |
9eecf808 | 1754 | dev_dbg(&port->dev, "%s -- Empty\n", __func__); |
2f9ea55c KS |
1755 | result = TIOCSER_TEMT; |
1756 | } | |
0f64478c | 1757 | } |
0f64478c GKH |
1758 | if (copy_to_user(value, &result, sizeof(int))) |
1759 | return -EFAULT; | |
1760 | return 0; | |
1761 | } | |
1762 | ||
60b33c13 | 1763 | static int mos7720_tiocmget(struct tty_struct *tty) |
0f608f89 KS |
1764 | { |
1765 | struct usb_serial_port *port = tty->driver_data; | |
1766 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1767 | unsigned int result = 0; | |
1768 | unsigned int mcr ; | |
1769 | unsigned int msr ; | |
1770 | ||
0f608f89 KS |
1771 | mcr = mos7720_port->shadowMCR; |
1772 | msr = mos7720_port->shadowMSR; | |
1773 | ||
1774 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
1775 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
1776 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
1777 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ | |
1778 | | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
1779 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
1780 | ||
0f608f89 KS |
1781 | return result; |
1782 | } | |
1783 | ||
20b9d177 | 1784 | static int mos7720_tiocmset(struct tty_struct *tty, |
63b91767 | 1785 | unsigned int set, unsigned int clear) |
0f608f89 KS |
1786 | { |
1787 | struct usb_serial_port *port = tty->driver_data; | |
1788 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
1789 | unsigned int mcr ; | |
0f608f89 KS |
1790 | |
1791 | mcr = mos7720_port->shadowMCR; | |
1792 | ||
1793 | if (set & TIOCM_RTS) | |
1794 | mcr |= UART_MCR_RTS; | |
1795 | if (set & TIOCM_DTR) | |
1796 | mcr |= UART_MCR_DTR; | |
1797 | if (set & TIOCM_LOOP) | |
1798 | mcr |= UART_MCR_LOOP; | |
1799 | ||
1800 | if (clear & TIOCM_RTS) | |
1801 | mcr &= ~UART_MCR_RTS; | |
1802 | if (clear & TIOCM_DTR) | |
1803 | mcr &= ~UART_MCR_DTR; | |
1804 | if (clear & TIOCM_LOOP) | |
1805 | mcr &= ~UART_MCR_LOOP; | |
1806 | ||
1807 | mos7720_port->shadowMCR = mcr; | |
ee5729ec | 1808 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1809 | mos7720_port->shadowMCR); |
0f608f89 KS |
1810 | |
1811 | return 0; | |
1812 | } | |
1813 | ||
0f64478c GKH |
1814 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
1815 | unsigned int __user *value) | |
1816 | { | |
0bca1b91 | 1817 | unsigned int mcr; |
0f64478c | 1818 | unsigned int arg; |
0f64478c GKH |
1819 | |
1820 | struct usb_serial_port *port; | |
1821 | ||
1822 | if (mos7720_port == NULL) | |
1823 | return -1; | |
1824 | ||
4da1a17d | 1825 | port = (struct usb_serial_port *)mos7720_port->port; |
0f64478c GKH |
1826 | mcr = mos7720_port->shadowMCR; |
1827 | ||
1828 | if (copy_from_user(&arg, value, sizeof(int))) | |
1829 | return -EFAULT; | |
1830 | ||
1831 | switch (cmd) { | |
1832 | case TIOCMBIS: | |
1833 | if (arg & TIOCM_RTS) | |
1834 | mcr |= UART_MCR_RTS; | |
1835 | if (arg & TIOCM_DTR) | |
1836 | mcr |= UART_MCR_RTS; | |
1837 | if (arg & TIOCM_LOOP) | |
1838 | mcr |= UART_MCR_LOOP; | |
1839 | break; | |
1840 | ||
1841 | case TIOCMBIC: | |
1842 | if (arg & TIOCM_RTS) | |
1843 | mcr &= ~UART_MCR_RTS; | |
1844 | if (arg & TIOCM_DTR) | |
1845 | mcr &= ~UART_MCR_RTS; | |
1846 | if (arg & TIOCM_LOOP) | |
1847 | mcr &= ~UART_MCR_LOOP; | |
1848 | break; | |
1849 | ||
0f64478c GKH |
1850 | } |
1851 | ||
1852 | mos7720_port->shadowMCR = mcr; | |
ee5729ec | 1853 | write_mos_reg(port->serial, port->port_number, MOS7720_MCR, |
1143832e | 1854 | mos7720_port->shadowMCR); |
0f64478c GKH |
1855 | |
1856 | return 0; | |
1857 | } | |
1858 | ||
0f64478c GKH |
1859 | static int get_serial_info(struct moschip_port *mos7720_port, |
1860 | struct serial_struct __user *retinfo) | |
1861 | { | |
1862 | struct serial_struct tmp; | |
1863 | ||
1864 | if (!retinfo) | |
1865 | return -EFAULT; | |
1866 | ||
1867 | memset(&tmp, 0, sizeof(tmp)); | |
1868 | ||
1869 | tmp.type = PORT_16550A; | |
e5b1e206 | 1870 | tmp.line = mos7720_port->port->minor; |
1143832e | 1871 | tmp.port = mos7720_port->port->port_number; |
0f64478c GKH |
1872 | tmp.irq = 0; |
1873 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
4da1a17d | 1874 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
0f64478c GKH |
1875 | tmp.baud_base = 9600; |
1876 | tmp.close_delay = 5*HZ; | |
1877 | tmp.closing_wait = 30*HZ; | |
1878 | ||
1879 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1880 | return -EFAULT; | |
1881 | return 0; | |
1882 | } | |
1883 | ||
00a0d0d6 | 1884 | static int mos7720_ioctl(struct tty_struct *tty, |
0f64478c GKH |
1885 | unsigned int cmd, unsigned long arg) |
1886 | { | |
95da310e | 1887 | struct usb_serial_port *port = tty->driver_data; |
0f64478c | 1888 | struct moschip_port *mos7720_port; |
0f64478c GKH |
1889 | |
1890 | mos7720_port = usb_get_serial_port_data(port); | |
1891 | if (mos7720_port == NULL) | |
1892 | return -ENODEV; | |
1893 | ||
0f64478c | 1894 | switch (cmd) { |
0f64478c | 1895 | case TIOCSERGETLSR: |
9eecf808 | 1896 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
4da1a17d AC |
1897 | return get_lsr_info(tty, mos7720_port, |
1898 | (unsigned int __user *)arg); | |
0f64478c | 1899 | |
95da310e | 1900 | /* FIXME: These should be using the mode methods */ |
0f64478c GKH |
1901 | case TIOCMBIS: |
1902 | case TIOCMBIC: | |
9eecf808 | 1903 | dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__); |
0f64478c GKH |
1904 | return set_modem_info(mos7720_port, cmd, |
1905 | (unsigned int __user *)arg); | |
1906 | ||
0f64478c | 1907 | case TIOCGSERIAL: |
9eecf808 | 1908 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
0f64478c GKH |
1909 | return get_serial_info(mos7720_port, |
1910 | (struct serial_struct __user *)arg); | |
0f64478c GKH |
1911 | } |
1912 | ||
1913 | return -ENOIOCTLCMD; | |
1914 | } | |
1915 | ||
1916 | static int mos7720_startup(struct usb_serial *serial) | |
1917 | { | |
0f64478c | 1918 | struct usb_device *dev; |
0f64478c | 1919 | char data; |
91f58ae6 | 1920 | u16 product; |
b69578df | 1921 | int ret_val; |
0f64478c | 1922 | |
91f58ae6 | 1923 | product = le16_to_cpu(serial->dev->descriptor.idProduct); |
0f64478c GKH |
1924 | dev = serial->dev; |
1925 | ||
fb088e33 MD |
1926 | /* |
1927 | * The 7715 uses the first bulk in/out endpoint pair for the parallel | |
1928 | * port, and the second for the serial port. Because the usbserial core | |
1929 | * assumes both pairs are serial ports, we must engage in a bit of | |
1930 | * subterfuge and swap the pointers for ports 0 and 1 in order to make | |
1931 | * port 0 point to the serial port. However, both moschip devices use a | |
1932 | * single interrupt-in endpoint for both ports (as mentioned a little | |
1933 | * further down), and this endpoint was assigned to port 0. So after | |
1934 | * the swap, we must copy the interrupt endpoint elements from port 1 | |
1935 | * (as newly assigned) to port 0, and null out port 1 pointers. | |
1936 | */ | |
1937 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1938 | struct usb_serial_port *tmp = serial->port[0]; | |
1939 | serial->port[0] = serial->port[1]; | |
1940 | serial->port[1] = tmp; | |
1941 | serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; | |
1942 | serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; | |
1943 | serial->port[0]->interrupt_in_endpointAddress = | |
1944 | tmp->interrupt_in_endpointAddress; | |
1945 | serial->port[1]->interrupt_in_urb = NULL; | |
1946 | serial->port[1]->interrupt_in_buffer = NULL; | |
1947 | } | |
1948 | ||
0f64478c GKH |
1949 | /* setting configuration feature to one */ |
1950 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
849513a7 | 1951 | (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
0f64478c | 1952 | |
b69578df MD |
1953 | /* start the interrupt urb */ |
1954 | ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); | |
1955 | if (ret_val) | |
1956 | dev_err(&dev->dev, | |
1957 | "%s - Error %d submitting control urb\n", | |
1958 | __func__, ret_val); | |
1959 | ||
1960 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT | |
1961 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
1962 | ret_val = mos7715_parport_init(serial); | |
1963 | if (ret_val < 0) | |
1964 | return ret_val; | |
1965 | } | |
1966 | #endif | |
4da1a17d | 1967 | /* LSR For Port 1 */ |
ee5729ec | 1968 | read_mos_reg(serial, 0, MOS7720_LSR, &data); |
9eecf808 | 1969 | dev_dbg(&dev->dev, "LSR:%x\n", data); |
0f64478c GKH |
1970 | |
1971 | return 0; | |
1972 | } | |
1973 | ||
f9c99bb8 | 1974 | static void mos7720_release(struct usb_serial *serial) |
0f64478c | 1975 | { |
b69578df MD |
1976 | #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
1977 | /* close the parallel port */ | |
1978 | ||
1979 | if (le16_to_cpu(serial->dev->descriptor.idProduct) | |
1980 | == MOSCHIP_DEVICE_ID_7715) { | |
1981 | struct urbtracker *urbtrack; | |
1982 | unsigned long flags; | |
1983 | struct mos7715_parport *mos_parport = | |
1984 | usb_get_serial_data(serial); | |
1985 | ||
1986 | /* prevent NULL ptr dereference in port callbacks */ | |
1987 | spin_lock(&release_lock); | |
1988 | mos_parport->pp->private_data = NULL; | |
1989 | spin_unlock(&release_lock); | |
1990 | ||
1991 | /* wait for synchronous usb calls to return */ | |
1992 | if (mos_parport->msg_pending) | |
1993 | wait_for_completion_timeout(&mos_parport->syncmsg_compl, | |
849513a7 | 1994 | msecs_to_jiffies(MOS_WDR_TIMEOUT)); |
b69578df MD |
1995 | |
1996 | parport_remove_port(mos_parport->pp); | |
1997 | usb_set_serial_data(serial, NULL); | |
1998 | mos_parport->serial = NULL; | |
1999 | ||
2000 | /* if tasklet currently scheduled, wait for it to complete */ | |
2001 | tasklet_kill(&mos_parport->urb_tasklet); | |
2002 | ||
2003 | /* unlink any urbs sent by the tasklet */ | |
2004 | spin_lock_irqsave(&mos_parport->listlock, flags); | |
2005 | list_for_each_entry(urbtrack, | |
2006 | &mos_parport->active_urbs, | |
2007 | urblist_entry) | |
2008 | usb_unlink_urb(urbtrack->urb); | |
2009 | spin_unlock_irqrestore(&mos_parport->listlock, flags); | |
dcb21ad4 | 2010 | parport_del_port(mos_parport->pp); |
b69578df MD |
2011 | |
2012 | kref_put(&mos_parport->ref_count, destroy_mos_parport); | |
2013 | } | |
2014 | #endif | |
4230af57 JH |
2015 | } |
2016 | ||
2017 | static int mos7720_port_probe(struct usb_serial_port *port) | |
2018 | { | |
2019 | struct moschip_port *mos7720_port; | |
2020 | ||
2021 | mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); | |
2022 | if (!mos7720_port) | |
2023 | return -ENOMEM; | |
2024 | ||
2025 | /* Initialize all port interrupt end point to port 0 int endpoint. | |
2026 | * Our device has only one interrupt endpoint common to all ports. | |
2027 | */ | |
2028 | port->interrupt_in_endpointAddress = | |
2029 | port->serial->port[0]->interrupt_in_endpointAddress; | |
2030 | mos7720_port->port = port; | |
2031 | ||
2032 | usb_set_serial_port_data(port, mos7720_port); | |
2033 | ||
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | static int mos7720_port_remove(struct usb_serial_port *port) | |
2038 | { | |
2039 | struct moschip_port *mos7720_port; | |
2040 | ||
2041 | mos7720_port = usb_get_serial_port_data(port); | |
2042 | kfree(mos7720_port); | |
2043 | ||
2044 | return 0; | |
0f64478c GKH |
2045 | } |
2046 | ||
2047 | static struct usb_serial_driver moschip7720_2port_driver = { | |
2048 | .driver = { | |
2049 | .owner = THIS_MODULE, | |
2050 | .name = "moschip7720", | |
2051 | }, | |
2052 | .description = "Moschip 2 port adapter", | |
68e24113 | 2053 | .id_table = id_table, |
fb088e33 | 2054 | .calc_num_ports = mos77xx_calc_num_ports, |
0f64478c GKH |
2055 | .open = mos7720_open, |
2056 | .close = mos7720_close, | |
2057 | .throttle = mos7720_throttle, | |
2058 | .unthrottle = mos7720_unthrottle, | |
fb088e33 | 2059 | .probe = mos77xx_probe, |
0f64478c | 2060 | .attach = mos7720_startup, |
f9c99bb8 | 2061 | .release = mos7720_release, |
4230af57 JH |
2062 | .port_probe = mos7720_port_probe, |
2063 | .port_remove = mos7720_port_remove, | |
0f64478c | 2064 | .ioctl = mos7720_ioctl, |
0f608f89 KS |
2065 | .tiocmget = mos7720_tiocmget, |
2066 | .tiocmset = mos7720_tiocmset, | |
0f64478c GKH |
2067 | .set_termios = mos7720_set_termios, |
2068 | .write = mos7720_write, | |
2069 | .write_room = mos7720_write_room, | |
2070 | .chars_in_buffer = mos7720_chars_in_buffer, | |
2071 | .break_ctl = mos7720_break, | |
2072 | .read_bulk_callback = mos7720_bulk_in_callback, | |
fb088e33 | 2073 | .read_int_callback = NULL /* dynamically assigned in probe() */ |
0f64478c GKH |
2074 | }; |
2075 | ||
4d2a7aff AS |
2076 | static struct usb_serial_driver * const serial_drivers[] = { |
2077 | &moschip7720_2port_driver, NULL | |
2078 | }; | |
2079 | ||
68e24113 | 2080 | module_usb_serial_driver(serial_drivers, id_table); |
0f64478c | 2081 | |
4da1a17d AC |
2082 | MODULE_AUTHOR(DRIVER_AUTHOR); |
2083 | MODULE_DESCRIPTION(DRIVER_DESC); | |
0f64478c | 2084 | MODULE_LICENSE("GPL"); |