1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Clean ups from Moschip version and a few ioctl implementations by: |
4 | * Paul B Schroeder <pschroeder "at" uplogix "dot" com> |
5 | * |
6 | * Originally based on drivers/usb/serial/io_edgeport.c which is: |
7 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. |
8 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
9 | * |
10 | */ |
11 | |
12 | #include <linux/kernel.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/tty.h> |
16 | #include <linux/tty_driver.h> |
17 | #include <linux/tty_flip.h> |
18 | #include <linux/module.h> |
19 | #include <linux/serial.h> |
20 | #include <linux/usb.h> |
21 | #include <linux/usb/serial.h> |
22 | #include <linux/uaccess.h> |
23 | |
24 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
25 | |
26 | /* |
27 | * 16C50 UART register defines |
28 | */ |
29 | |
30 | #define LCR_BITS_5 0x00 /* 5 bits/char */ |
31 | #define LCR_BITS_6 0x01 /* 6 bits/char */ |
32 | #define LCR_BITS_7 0x02 /* 7 bits/char */ |
33 | #define LCR_BITS_8 0x03 /* 8 bits/char */ |
34 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ |
35 | |
36 | #define LCR_STOP_1 0x00 /* 1 stop bit */ |
37 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ |
38 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ |
39 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ |
40 | |
41 | #define LCR_PAR_NONE 0x00 /* No parity */ |
42 | #define LCR_PAR_ODD 0x08 /* Odd parity */ |
43 | #define LCR_PAR_EVEN 0x18 /* Even parity */ |
44 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ |
45 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ |
46 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ |
47 | |
48 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ |
49 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ |
50 | |
51 | #define MCR_DTR 0x01 /* Assert DTR */ |
52 | #define MCR_RTS 0x02 /* Assert RTS */ |
53 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ |
54 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ |
55 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ |
56 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ |
57 | |
58 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ |
59 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ |
60 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ |
61 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ |
62 | |
63 | /* |
64 | * Defines used for sending commands to port |
65 | */ |
66 | |
67 | #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ |
68 | |
69 | #define MOS_PORT1 0x0200 |
70 | #define MOS_PORT2 0x0300 |
71 | #define MOS_VENREG 0x0000 |
72 | #define MOS_MAX_PORT 0x02 |
73 | #define MOS_WRITE 0x0E |
74 | #define MOS_READ 0x0D |
75 | |
76 | /* Requests */ |
77 | #define MCS_RD_RTYPE 0xC0 |
78 | #define MCS_WR_RTYPE 0x40 |
79 | #define MCS_RDREQ 0x0D |
80 | #define MCS_WRREQ 0x0E |
81 | #define MCS_CTRL_TIMEOUT 500 |
82 | #define VENDOR_READ_LENGTH (0x01) |
83 | |
84 | #define MAX_NAME_LEN 64 |
85 | |
86 | #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
87 | #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ |
88 | |
89 | /* For higher baud Rates use TIOCEXBAUD */ |
90 | #define TIOCEXBAUD 0x5462 |
91 | |
92 | /* |
93 | * Vendor id and device id defines |
94 | * |
95 | * NOTE: Do not add new defines, add entries directly to the id_table instead. |
96 | */ |
97 | #define USB_VENDOR_ID_BANDB 0x0856 |
98 | #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 |
99 | #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 |
100 | #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 |
101 | #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 |
102 | #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 |
103 | #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 |
104 | #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 |
105 | #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 |
106 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 |
107 | #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 |
108 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 |
109 | #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 |
110 | |
111 | /* Interrupt Routine Defines */ |
112 | |
113 | #define SERIAL_IIR_RLS 0x06 |
114 | #define SERIAL_IIR_MS 0x00 |
115 | |
116 | /* |
117 | * Emulation of the bit mask on the LINE STATUS REGISTER. |
118 | */ |
119 | #define SERIAL_LSR_DR 0x0001 |
120 | #define SERIAL_LSR_OE 0x0002 |
121 | #define SERIAL_LSR_PE 0x0004 |
122 | #define SERIAL_LSR_FE 0x0008 |
123 | #define SERIAL_LSR_BI 0x0010 |
124 | |
125 | #define MOS_MSR_DELTA_CTS 0x10 |
126 | #define MOS_MSR_DELTA_DSR 0x20 |
127 | #define MOS_MSR_DELTA_RI 0x40 |
128 | #define MOS_MSR_DELTA_CD 0x80 |
129 | |
130 | /* Serial Port register Address */ |
131 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
132 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) |
133 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) |
134 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) |
135 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) |
136 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) |
137 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) |
138 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) |
139 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) |
140 | |
141 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) |
142 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) |
143 | #define GPIO_REGISTER ((__u16)(0x07)) |
144 | |
145 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) |
146 | |
147 | /* |
148 | * URB POOL related defines |
149 | */ |
150 | #define NUM_URBS 16 /* URB Count */ |
151 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ |
152 | |
153 | /* LED on/off milliseconds*/ |
154 | #define LED_ON_MS 500 |
155 | #define LED_OFF_MS 500 |
156 | |
157 | enum mos7840_flag { |
158 | MOS7840_FLAG_LED_BUSY, |
159 | }; |
160 | |
161 | #define MCS_PORT_MASK GENMASK(2, 0) |
162 | #define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK) |
163 | #define MCS_LED BIT(3) |
164 | |
165 | #define MCS_DEVICE(vid, pid, flags) \ |
166 | USB_DEVICE((vid), (pid)), .driver_info = (flags) |
167 | |
168 | static const struct usb_device_id id_table[] = { |
169 | { MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */ |
170 | { MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */ |
171 | { MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */ |
172 | { MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */ |
173 | { MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */ |
174 | { MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */ |
175 | { MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */ |
176 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) }, |
177 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) }, |
178 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) }, |
179 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) }, |
180 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) }, |
181 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) }, |
182 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) }, |
183 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) }, |
184 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) }, |
185 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) }, |
186 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) }, |
187 | { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) }, |
188 | {} /* terminating entry */ |
189 | }; |
190 | MODULE_DEVICE_TABLE(usb, id_table); |
191 | |
192 | /* This structure holds all of the local port information */ |
193 | |
194 | struct moschip_port { |
195 | int port_num; /*Actual port number in the device(1,2,etc) */ |
196 | struct urb *read_urb; /* read URB for this port */ |
197 | __u8 shadowLCR; /* last LCR value received */ |
198 | __u8 shadowMCR; /* last MCR value received */ |
199 | struct usb_serial_port *port; /* loop back to the owner of this object */ |
200 | |
201 | /* Offsets */ |
202 | __u8 SpRegOffset; |
203 | __u8 ControlRegOffset; |
204 | __u8 DcrRegOffset; |
205 | |
206 | spinlock_t pool_lock; |
207 | struct urb *write_urb_pool[NUM_URBS]; |
208 | char busy[NUM_URBS]; |
209 | bool read_urb_busy; |
210 | |
211 | /* For device(s) with LED indicator */ |
212 | bool has_led; |
213 | struct timer_list led_timer1; /* Timer for LED on */ |
214 | struct timer_list led_timer2; /* Timer for LED off */ |
215 | struct urb *led_urb; |
216 | struct usb_ctrlrequest *led_dr; |
217 | |
218 | unsigned long flags; |
219 | }; |
220 | |
221 | /* |
222 | * mos7840_set_reg_sync |
223 | * To set the Control register by calling usb_fill_control_urb function |
224 | * by passing usb_sndctrlpipe function as parameter. |
225 | */ |
226 | |
227 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, |
228 | __u16 val) |
229 | { |
230 | struct usb_device *dev = port->serial->dev; |
231 | val = val & 0x00ff; |
232 | dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n" , reg, val); |
233 | |
234 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
235 | MCS_WR_RTYPE, value: val, index: reg, NULL, size: 0, |
236 | MOS_WDR_TIMEOUT); |
237 | } |
238 | |
239 | /* |
240 | * mos7840_get_reg_sync |
241 | * To set the Uart register by calling usb_fill_control_urb function by |
242 | * passing usb_rcvctrlpipe function as parameter. |
243 | */ |
244 | |
245 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, |
246 | __u16 *val) |
247 | { |
248 | struct usb_device *dev = port->serial->dev; |
249 | int ret = 0; |
250 | u8 *buf; |
251 | |
252 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); |
253 | if (!buf) |
254 | return -ENOMEM; |
255 | |
256 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
257 | MCS_RD_RTYPE, value: 0, index: reg, data: buf, VENDOR_READ_LENGTH, |
258 | MOS_WDR_TIMEOUT); |
259 | if (ret < VENDOR_READ_LENGTH) { |
260 | if (ret >= 0) |
261 | ret = -EIO; |
262 | goto out; |
263 | } |
264 | |
265 | *val = buf[0]; |
266 | dev_dbg(&port->dev, "%s offset is %x, return val %x\n" , __func__, reg, *val); |
267 | out: |
268 | kfree(objp: buf); |
269 | return ret; |
270 | } |
271 | |
272 | /* |
273 | * mos7840_set_uart_reg |
274 | * To set the Uart register by calling usb_fill_control_urb function by |
275 | * passing usb_sndctrlpipe function as parameter. |
276 | */ |
277 | |
278 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, |
279 | __u16 val) |
280 | { |
281 | |
282 | struct usb_device *dev = port->serial->dev; |
283 | val = val & 0x00ff; |
284 | /* For the UART control registers, the application number need |
285 | to be Or'ed */ |
286 | if (port->serial->num_ports == 2 && port->port_number != 0) |
287 | val |= ((__u16)port->port_number + 2) << 8; |
288 | else |
289 | val |= ((__u16)port->port_number + 1) << 8; |
290 | dev_dbg(&port->dev, "%s application number is %x\n" , __func__, val); |
291 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
292 | MCS_WR_RTYPE, value: val, index: reg, NULL, size: 0, |
293 | MOS_WDR_TIMEOUT); |
294 | |
295 | } |
296 | |
297 | /* |
298 | * mos7840_get_uart_reg |
299 | * To set the Control register by calling usb_fill_control_urb function |
300 | * by passing usb_rcvctrlpipe function as parameter. |
301 | */ |
302 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, |
303 | __u16 *val) |
304 | { |
305 | struct usb_device *dev = port->serial->dev; |
306 | int ret = 0; |
307 | __u16 Wval; |
308 | u8 *buf; |
309 | |
310 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); |
311 | if (!buf) |
312 | return -ENOMEM; |
313 | |
314 | /* Wval is same as application number */ |
315 | if (port->serial->num_ports == 2 && port->port_number != 0) |
316 | Wval = ((__u16)port->port_number + 2) << 8; |
317 | else |
318 | Wval = ((__u16)port->port_number + 1) << 8; |
319 | dev_dbg(&port->dev, "%s application number is %x\n" , __func__, Wval); |
320 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
321 | MCS_RD_RTYPE, value: Wval, index: reg, data: buf, VENDOR_READ_LENGTH, |
322 | MOS_WDR_TIMEOUT); |
323 | if (ret < VENDOR_READ_LENGTH) { |
324 | if (ret >= 0) |
325 | ret = -EIO; |
326 | goto out; |
327 | } |
328 | *val = buf[0]; |
329 | out: |
330 | kfree(objp: buf); |
331 | return ret; |
332 | } |
333 | |
334 | static void mos7840_dump_serial_port(struct usb_serial_port *port, |
335 | struct moschip_port *mos7840_port) |
336 | { |
337 | |
338 | dev_dbg(&port->dev, "SpRegOffset is %2x\n" , mos7840_port->SpRegOffset); |
339 | dev_dbg(&port->dev, "ControlRegOffset is %2x\n" , mos7840_port->ControlRegOffset); |
340 | dev_dbg(&port->dev, "DCRRegOffset is %2x\n" , mos7840_port->DcrRegOffset); |
341 | |
342 | } |
343 | |
344 | /************************************************************************/ |
345 | /************************************************************************/ |
346 | /* U S B C A L L B A C K F U N C T I O N S */ |
347 | /* U S B C A L L B A C K F U N C T I O N S */ |
348 | /************************************************************************/ |
349 | /************************************************************************/ |
350 | |
351 | static void mos7840_set_led_callback(struct urb *urb) |
352 | { |
353 | switch (urb->status) { |
354 | case 0: |
355 | /* Success */ |
356 | break; |
357 | case -ECONNRESET: |
358 | case -ENOENT: |
359 | case -ESHUTDOWN: |
360 | /* This urb is terminated, clean up */ |
361 | dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n" , |
362 | __func__, urb->status); |
363 | break; |
364 | default: |
365 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n" , |
366 | __func__, urb->status); |
367 | } |
368 | } |
369 | |
370 | static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, |
371 | __u16 reg) |
372 | { |
373 | struct usb_device *dev = mcs->port->serial->dev; |
374 | struct usb_ctrlrequest *dr = mcs->led_dr; |
375 | |
376 | dr->bRequestType = MCS_WR_RTYPE; |
377 | dr->bRequest = MCS_WRREQ; |
378 | dr->wValue = cpu_to_le16(wval); |
379 | dr->wIndex = cpu_to_le16(reg); |
380 | dr->wLength = cpu_to_le16(0); |
381 | |
382 | usb_fill_control_urb(urb: mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), |
383 | setup_packet: (unsigned char *)dr, NULL, buffer_length: 0, complete_fn: mos7840_set_led_callback, NULL); |
384 | |
385 | usb_submit_urb(urb: mcs->led_urb, GFP_ATOMIC); |
386 | } |
387 | |
388 | static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, |
389 | __u16 val) |
390 | { |
391 | struct usb_device *dev = port->serial->dev; |
392 | |
393 | usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, |
394 | value: val, index: reg, NULL, size: 0, MOS_WDR_TIMEOUT); |
395 | } |
396 | |
397 | static void mos7840_led_off(struct timer_list *t) |
398 | { |
399 | struct moschip_port *mcs = from_timer(mcs, t, led_timer1); |
400 | |
401 | /* Turn off LED */ |
402 | mos7840_set_led_async(mcs, wval: 0x0300, MODEM_CONTROL_REGISTER); |
403 | mod_timer(timer: &mcs->led_timer2, |
404 | expires: jiffies + msecs_to_jiffies(LED_OFF_MS)); |
405 | } |
406 | |
407 | static void mos7840_led_flag_off(struct timer_list *t) |
408 | { |
409 | struct moschip_port *mcs = from_timer(mcs, t, led_timer2); |
410 | |
411 | clear_bit_unlock(nr: MOS7840_FLAG_LED_BUSY, addr: &mcs->flags); |
412 | } |
413 | |
414 | static void mos7840_led_activity(struct usb_serial_port *port) |
415 | { |
416 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
417 | |
418 | if (test_and_set_bit_lock(nr: MOS7840_FLAG_LED_BUSY, addr: &mos7840_port->flags)) |
419 | return; |
420 | |
421 | mos7840_set_led_async(mcs: mos7840_port, wval: 0x0301, MODEM_CONTROL_REGISTER); |
422 | mod_timer(timer: &mos7840_port->led_timer1, |
423 | expires: jiffies + msecs_to_jiffies(LED_ON_MS)); |
424 | } |
425 | |
426 | /***************************************************************************** |
427 | * mos7840_bulk_in_callback |
428 | * this is the callback function for when we have received data on the |
429 | * bulk in endpoint. |
430 | *****************************************************************************/ |
431 | |
432 | static void mos7840_bulk_in_callback(struct urb *urb) |
433 | { |
434 | struct moschip_port *mos7840_port = urb->context; |
435 | struct usb_serial_port *port = mos7840_port->port; |
436 | int retval; |
437 | unsigned char *data; |
438 | int status = urb->status; |
439 | |
440 | if (status) { |
441 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n" , status); |
442 | mos7840_port->read_urb_busy = false; |
443 | return; |
444 | } |
445 | |
446 | data = urb->transfer_buffer; |
447 | usb_serial_debug_data(dev: &port->dev, function: __func__, size: urb->actual_length, data); |
448 | |
449 | if (urb->actual_length) { |
450 | struct tty_port *tport = &mos7840_port->port->port; |
451 | tty_insert_flip_string(port: tport, chars: data, size: urb->actual_length); |
452 | tty_flip_buffer_push(port: tport); |
453 | port->icount.rx += urb->actual_length; |
454 | dev_dbg(&port->dev, "icount.rx is %d:\n" , port->icount.rx); |
455 | } |
456 | |
457 | if (mos7840_port->has_led) |
458 | mos7840_led_activity(port); |
459 | |
460 | mos7840_port->read_urb_busy = true; |
461 | retval = usb_submit_urb(urb: mos7840_port->read_urb, GFP_ATOMIC); |
462 | |
463 | if (retval) { |
464 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n" , retval); |
465 | mos7840_port->read_urb_busy = false; |
466 | } |
467 | } |
468 | |
469 | /***************************************************************************** |
470 | * mos7840_bulk_out_data_callback |
471 | * this is the callback function for when we have finished sending |
472 | * serial data on the bulk out endpoint. |
473 | *****************************************************************************/ |
474 | |
475 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
476 | { |
477 | struct moschip_port *mos7840_port = urb->context; |
478 | struct usb_serial_port *port = mos7840_port->port; |
479 | int status = urb->status; |
480 | unsigned long flags; |
481 | int i; |
482 | |
483 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
484 | for (i = 0; i < NUM_URBS; i++) { |
485 | if (urb == mos7840_port->write_urb_pool[i]) { |
486 | mos7840_port->busy[i] = 0; |
487 | break; |
488 | } |
489 | } |
490 | spin_unlock_irqrestore(lock: &mos7840_port->pool_lock, flags); |
491 | |
492 | if (status) { |
493 | dev_dbg(&port->dev, "nonzero write bulk status received:%d\n" , status); |
494 | return; |
495 | } |
496 | |
497 | tty_port_tty_wakeup(port: &port->port); |
498 | |
499 | } |
500 | |
501 | /************************************************************************/ |
502 | /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ |
503 | /************************************************************************/ |
504 | |
505 | /***************************************************************************** |
506 | * mos7840_open |
507 | * this function is called by the tty driver when a port is opened |
508 | * If successful, we return 0 |
509 | * Otherwise we return a negative error number. |
510 | *****************************************************************************/ |
511 | |
512 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
513 | { |
514 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
515 | struct usb_serial *serial = port->serial; |
516 | int response; |
517 | int j; |
518 | struct urb *urb; |
519 | __u16 Data; |
520 | int status; |
521 | |
522 | usb_clear_halt(dev: serial->dev, pipe: port->write_urb->pipe); |
523 | usb_clear_halt(dev: serial->dev, pipe: port->read_urb->pipe); |
524 | |
525 | /* Initialising the write urb pool */ |
526 | for (j = 0; j < NUM_URBS; ++j) { |
527 | urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
528 | mos7840_port->write_urb_pool[j] = urb; |
529 | if (!urb) |
530 | continue; |
531 | |
532 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
533 | GFP_KERNEL); |
534 | if (!urb->transfer_buffer) { |
535 | usb_free_urb(urb); |
536 | mos7840_port->write_urb_pool[j] = NULL; |
537 | continue; |
538 | } |
539 | } |
540 | |
541 | /***************************************************************************** |
542 | * Initialize MCS7840 -- Write Init values to corresponding Registers |
543 | * |
544 | * Register Index |
545 | * 1 : IER |
546 | * 2 : FCR |
547 | * 3 : LCR |
548 | * 4 : MCR |
549 | * |
550 | * 0x08 : SP1/2 Control Reg |
551 | *****************************************************************************/ |
552 | |
553 | /* NEED to check the following Block */ |
554 | |
555 | Data = 0x0; |
556 | status = mos7840_get_reg_sync(port, reg: mos7840_port->SpRegOffset, val: &Data); |
557 | if (status < 0) { |
558 | dev_dbg(&port->dev, "Reading Spreg failed\n" ); |
559 | goto err; |
560 | } |
561 | Data |= 0x80; |
562 | status = mos7840_set_reg_sync(port, reg: mos7840_port->SpRegOffset, val: Data); |
563 | if (status < 0) { |
564 | dev_dbg(&port->dev, "writing Spreg failed\n" ); |
565 | goto err; |
566 | } |
567 | |
568 | Data &= ~0x80; |
569 | status = mos7840_set_reg_sync(port, reg: mos7840_port->SpRegOffset, val: Data); |
570 | if (status < 0) { |
571 | dev_dbg(&port->dev, "writing Spreg failed\n" ); |
572 | goto err; |
573 | } |
574 | /* End of block to be checked */ |
575 | |
576 | Data = 0x0; |
577 | status = mos7840_get_reg_sync(port, reg: mos7840_port->ControlRegOffset, |
578 | val: &Data); |
579 | if (status < 0) { |
580 | dev_dbg(&port->dev, "Reading Controlreg failed\n" ); |
581 | goto err; |
582 | } |
583 | Data |= 0x08; /* Driver done bit */ |
584 | Data |= 0x20; /* rx_disable */ |
585 | status = mos7840_set_reg_sync(port, |
586 | reg: mos7840_port->ControlRegOffset, val: Data); |
587 | if (status < 0) { |
588 | dev_dbg(&port->dev, "writing Controlreg failed\n" ); |
589 | goto err; |
590 | } |
591 | /* do register settings here */ |
592 | /* Set all regs to the device default values. */ |
593 | /*********************************** |
594 | * First Disable all interrupts. |
595 | ***********************************/ |
596 | Data = 0x00; |
597 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, val: Data); |
598 | if (status < 0) { |
599 | dev_dbg(&port->dev, "disabling interrupts failed\n" ); |
600 | goto err; |
601 | } |
602 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
603 | Data = 0x00; |
604 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, val: Data); |
605 | if (status < 0) { |
606 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n" ); |
607 | goto err; |
608 | } |
609 | |
610 | Data = 0xcf; |
611 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, val: Data); |
612 | if (status < 0) { |
613 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n" ); |
614 | goto err; |
615 | } |
616 | |
617 | Data = 0x03; |
618 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
619 | mos7840_port->shadowLCR = Data; |
620 | |
621 | Data = 0x0b; |
622 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: Data); |
623 | mos7840_port->shadowMCR = Data; |
624 | |
625 | Data = 0x00; |
626 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, val: &Data); |
627 | mos7840_port->shadowLCR = Data; |
628 | |
629 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
630 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
631 | |
632 | Data = 0x0c; |
633 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, val: Data); |
634 | |
635 | Data = 0x0; |
636 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, val: Data); |
637 | |
638 | Data = 0x00; |
639 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, val: &Data); |
640 | |
641 | Data = Data & ~SERIAL_LCR_DLAB; |
642 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
643 | mos7840_port->shadowLCR = Data; |
644 | |
645 | /* clearing Bulkin and Bulkout Fifo */ |
646 | Data = 0x0; |
647 | status = mos7840_get_reg_sync(port, reg: mos7840_port->SpRegOffset, val: &Data); |
648 | |
649 | Data = Data | 0x0c; |
650 | status = mos7840_set_reg_sync(port, reg: mos7840_port->SpRegOffset, val: Data); |
651 | |
652 | Data = Data & ~0x0c; |
653 | status = mos7840_set_reg_sync(port, reg: mos7840_port->SpRegOffset, val: Data); |
654 | /* Finally enable all interrupts */ |
655 | Data = 0x0c; |
656 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, val: Data); |
657 | |
658 | /* clearing rx_disable */ |
659 | Data = 0x0; |
660 | status = mos7840_get_reg_sync(port, reg: mos7840_port->ControlRegOffset, |
661 | val: &Data); |
662 | Data = Data & ~0x20; |
663 | status = mos7840_set_reg_sync(port, reg: mos7840_port->ControlRegOffset, |
664 | val: Data); |
665 | |
666 | /* rx_negate */ |
667 | Data = 0x0; |
668 | status = mos7840_get_reg_sync(port, reg: mos7840_port->ControlRegOffset, |
669 | val: &Data); |
670 | Data = Data | 0x10; |
671 | status = mos7840_set_reg_sync(port, reg: mos7840_port->ControlRegOffset, |
672 | val: Data); |
673 | |
674 | dev_dbg(&port->dev, "port number is %d\n" , port->port_number); |
675 | dev_dbg(&port->dev, "minor number is %d\n" , port->minor); |
676 | dev_dbg(&port->dev, "Bulkin endpoint is %d\n" , port->bulk_in_endpointAddress); |
677 | dev_dbg(&port->dev, "BulkOut endpoint is %d\n" , port->bulk_out_endpointAddress); |
678 | dev_dbg(&port->dev, "Interrupt endpoint is %d\n" , port->interrupt_in_endpointAddress); |
679 | dev_dbg(&port->dev, "port's number in the device is %d\n" , mos7840_port->port_num); |
680 | mos7840_port->read_urb = port->read_urb; |
681 | |
682 | /* set up our bulk in urb */ |
683 | if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { |
684 | usb_fill_bulk_urb(urb: mos7840_port->read_urb, |
685 | dev: serial->dev, |
686 | usb_rcvbulkpipe(serial->dev, |
687 | (port->bulk_in_endpointAddress) + 2), |
688 | transfer_buffer: port->bulk_in_buffer, |
689 | buffer_length: mos7840_port->read_urb->transfer_buffer_length, |
690 | complete_fn: mos7840_bulk_in_callback, context: mos7840_port); |
691 | } else { |
692 | usb_fill_bulk_urb(urb: mos7840_port->read_urb, |
693 | dev: serial->dev, |
694 | usb_rcvbulkpipe(serial->dev, |
695 | port->bulk_in_endpointAddress), |
696 | transfer_buffer: port->bulk_in_buffer, |
697 | buffer_length: mos7840_port->read_urb->transfer_buffer_length, |
698 | complete_fn: mos7840_bulk_in_callback, context: mos7840_port); |
699 | } |
700 | |
701 | dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n" , __func__, port->bulk_in_endpointAddress); |
702 | mos7840_port->read_urb_busy = true; |
703 | response = usb_submit_urb(urb: mos7840_port->read_urb, GFP_KERNEL); |
704 | if (response) { |
705 | dev_err(&port->dev, "%s - Error %d submitting control urb\n" , |
706 | __func__, response); |
707 | mos7840_port->read_urb_busy = false; |
708 | } |
709 | |
710 | /* initialize our port settings */ |
711 | /* Must set to enable ints! */ |
712 | mos7840_port->shadowMCR = MCR_MASTER_IE; |
713 | |
714 | return 0; |
715 | err: |
716 | for (j = 0; j < NUM_URBS; ++j) { |
717 | urb = mos7840_port->write_urb_pool[j]; |
718 | if (!urb) |
719 | continue; |
720 | kfree(objp: urb->transfer_buffer); |
721 | usb_free_urb(urb); |
722 | } |
723 | return status; |
724 | } |
725 | |
726 | /***************************************************************************** |
727 | * mos7840_chars_in_buffer |
728 | * this function is called by the tty driver when it wants to know how many |
729 | * bytes of data we currently have outstanding in the port (data that has |
730 | * been written, but hasn't made it out the port yet) |
731 | *****************************************************************************/ |
732 | |
733 | static unsigned int mos7840_chars_in_buffer(struct tty_struct *tty) |
734 | { |
735 | struct usb_serial_port *port = tty->driver_data; |
736 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
737 | int i; |
738 | unsigned int chars = 0; |
739 | unsigned long flags; |
740 | |
741 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
742 | for (i = 0; i < NUM_URBS; ++i) { |
743 | if (mos7840_port->busy[i]) { |
744 | struct urb *urb = mos7840_port->write_urb_pool[i]; |
745 | chars += urb->transfer_buffer_length; |
746 | } |
747 | } |
748 | spin_unlock_irqrestore(lock: &mos7840_port->pool_lock, flags); |
749 | dev_dbg(&port->dev, "%s - returns %u\n" , __func__, chars); |
750 | return chars; |
751 | |
752 | } |
753 | |
754 | /***************************************************************************** |
755 | * mos7840_close |
756 | * this function is called by the tty driver when a port is closed |
757 | *****************************************************************************/ |
758 | |
759 | static void mos7840_close(struct usb_serial_port *port) |
760 | { |
761 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
762 | int j; |
763 | __u16 Data; |
764 | |
765 | for (j = 0; j < NUM_URBS; ++j) |
766 | usb_kill_urb(urb: mos7840_port->write_urb_pool[j]); |
767 | |
768 | /* Freeing Write URBs */ |
769 | for (j = 0; j < NUM_URBS; ++j) { |
770 | if (mos7840_port->write_urb_pool[j]) { |
771 | kfree(objp: mos7840_port->write_urb_pool[j]->transfer_buffer); |
772 | usb_free_urb(urb: mos7840_port->write_urb_pool[j]); |
773 | } |
774 | } |
775 | |
776 | usb_kill_urb(urb: mos7840_port->read_urb); |
777 | mos7840_port->read_urb_busy = false; |
778 | |
779 | Data = 0x0; |
780 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: Data); |
781 | |
782 | Data = 0x00; |
783 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, val: Data); |
784 | } |
785 | |
786 | /***************************************************************************** |
787 | * mos7840_break |
788 | * this function sends a break to the port |
789 | *****************************************************************************/ |
790 | static int mos7840_break(struct tty_struct *tty, int break_state) |
791 | { |
792 | struct usb_serial_port *port = tty->driver_data; |
793 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
794 | unsigned char data; |
795 | |
796 | if (break_state == -1) |
797 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
798 | else |
799 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
800 | |
801 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
802 | mos7840_port->shadowLCR = data; |
803 | dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n" , __func__, mos7840_port->shadowLCR); |
804 | |
805 | return mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, |
806 | val: mos7840_port->shadowLCR); |
807 | } |
808 | |
809 | /***************************************************************************** |
810 | * mos7840_write_room |
811 | * this function is called by the tty driver when it wants to know how many |
812 | * bytes of data we can accept for a specific port. |
813 | *****************************************************************************/ |
814 | |
815 | static unsigned int mos7840_write_room(struct tty_struct *tty) |
816 | { |
817 | struct usb_serial_port *port = tty->driver_data; |
818 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
819 | int i; |
820 | unsigned int room = 0; |
821 | unsigned long flags; |
822 | |
823 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
824 | for (i = 0; i < NUM_URBS; ++i) { |
825 | if (!mos7840_port->busy[i]) |
826 | room += URB_TRANSFER_BUFFER_SIZE; |
827 | } |
828 | spin_unlock_irqrestore(lock: &mos7840_port->pool_lock, flags); |
829 | |
830 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
831 | dev_dbg(&mos7840_port->port->dev, "%s - returns %u\n" , __func__, room); |
832 | return room; |
833 | |
834 | } |
835 | |
836 | /***************************************************************************** |
837 | * mos7840_write |
838 | * this function is called by the tty driver when data should be written to |
839 | * the port. |
840 | * If successful, we return the number of bytes written, otherwise we |
841 | * return a negative error number. |
842 | *****************************************************************************/ |
843 | |
844 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
845 | const unsigned char *data, int count) |
846 | { |
847 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
848 | struct usb_serial *serial = port->serial; |
849 | int status; |
850 | int i; |
851 | int bytes_sent = 0; |
852 | int transfer_size; |
853 | unsigned long flags; |
854 | struct urb *urb; |
855 | /* __u16 Data; */ |
856 | const unsigned char *current_position = data; |
857 | |
858 | /* try to find a free urb in the list */ |
859 | urb = NULL; |
860 | |
861 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
862 | for (i = 0; i < NUM_URBS; ++i) { |
863 | if (!mos7840_port->busy[i]) { |
864 | mos7840_port->busy[i] = 1; |
865 | urb = mos7840_port->write_urb_pool[i]; |
866 | dev_dbg(&port->dev, "URB:%d\n" , i); |
867 | break; |
868 | } |
869 | } |
870 | spin_unlock_irqrestore(lock: &mos7840_port->pool_lock, flags); |
871 | |
872 | if (urb == NULL) { |
873 | dev_dbg(&port->dev, "%s - no more free urbs\n" , __func__); |
874 | goto exit; |
875 | } |
876 | |
877 | if (urb->transfer_buffer == NULL) { |
878 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
879 | GFP_ATOMIC); |
880 | if (!urb->transfer_buffer) { |
881 | bytes_sent = -ENOMEM; |
882 | goto exit; |
883 | } |
884 | } |
885 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
886 | |
887 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
888 | |
889 | /* fill urb with data and submit */ |
890 | if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { |
891 | usb_fill_bulk_urb(urb, |
892 | dev: serial->dev, |
893 | usb_sndbulkpipe(serial->dev, |
894 | (port->bulk_out_endpointAddress) + 2), |
895 | transfer_buffer: urb->transfer_buffer, |
896 | buffer_length: transfer_size, |
897 | complete_fn: mos7840_bulk_out_data_callback, context: mos7840_port); |
898 | } else { |
899 | usb_fill_bulk_urb(urb, |
900 | dev: serial->dev, |
901 | usb_sndbulkpipe(serial->dev, |
902 | port->bulk_out_endpointAddress), |
903 | transfer_buffer: urb->transfer_buffer, |
904 | buffer_length: transfer_size, |
905 | complete_fn: mos7840_bulk_out_data_callback, context: mos7840_port); |
906 | } |
907 | |
908 | dev_dbg(&port->dev, "bulkout endpoint is %d\n" , port->bulk_out_endpointAddress); |
909 | |
910 | if (mos7840_port->has_led) |
911 | mos7840_led_activity(port); |
912 | |
913 | /* send it down the pipe */ |
914 | status = usb_submit_urb(urb, GFP_ATOMIC); |
915 | |
916 | if (status) { |
917 | mos7840_port->busy[i] = 0; |
918 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
919 | "with status = %d\n" , __func__, status); |
920 | bytes_sent = status; |
921 | goto exit; |
922 | } |
923 | bytes_sent = transfer_size; |
924 | port->icount.tx += transfer_size; |
925 | dev_dbg(&port->dev, "icount.tx is %d:\n" , port->icount.tx); |
926 | exit: |
927 | return bytes_sent; |
928 | |
929 | } |
930 | |
931 | /***************************************************************************** |
932 | * mos7840_throttle |
933 | * this function is called by the tty driver when it wants to stop the data |
934 | * being read from the port. |
935 | *****************************************************************************/ |
936 | |
937 | static void mos7840_throttle(struct tty_struct *tty) |
938 | { |
939 | struct usb_serial_port *port = tty->driver_data; |
940 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
941 | int status; |
942 | |
943 | /* if we are implementing XON/XOFF, send the stop character */ |
944 | if (I_IXOFF(tty)) { |
945 | unsigned char stop_char = STOP_CHAR(tty); |
946 | status = mos7840_write(tty, port, data: &stop_char, count: 1); |
947 | if (status <= 0) |
948 | return; |
949 | } |
950 | /* if we are implementing RTS/CTS, toggle that line */ |
951 | if (C_CRTSCTS(tty)) { |
952 | mos7840_port->shadowMCR &= ~MCR_RTS; |
953 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
954 | val: mos7840_port->shadowMCR); |
955 | if (status < 0) |
956 | return; |
957 | } |
958 | } |
959 | |
960 | /***************************************************************************** |
961 | * mos7840_unthrottle |
962 | * this function is called by the tty driver when it wants to resume |
963 | * the data being read from the port (called after mos7840_throttle is |
964 | * called) |
965 | *****************************************************************************/ |
966 | static void mos7840_unthrottle(struct tty_struct *tty) |
967 | { |
968 | struct usb_serial_port *port = tty->driver_data; |
969 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
970 | int status; |
971 | |
972 | /* if we are implementing XON/XOFF, send the start character */ |
973 | if (I_IXOFF(tty)) { |
974 | unsigned char start_char = START_CHAR(tty); |
975 | status = mos7840_write(tty, port, data: &start_char, count: 1); |
976 | if (status <= 0) |
977 | return; |
978 | } |
979 | |
980 | /* if we are implementing RTS/CTS, toggle that line */ |
981 | if (C_CRTSCTS(tty)) { |
982 | mos7840_port->shadowMCR |= MCR_RTS; |
983 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
984 | val: mos7840_port->shadowMCR); |
985 | if (status < 0) |
986 | return; |
987 | } |
988 | } |
989 | |
990 | static int mos7840_tiocmget(struct tty_struct *tty) |
991 | { |
992 | struct usb_serial_port *port = tty->driver_data; |
993 | unsigned int result; |
994 | __u16 msr; |
995 | __u16 mcr; |
996 | int status; |
997 | |
998 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, val: &msr); |
999 | if (status < 0) |
1000 | return -EIO; |
1001 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, val: &mcr); |
1002 | if (status < 0) |
1003 | return -EIO; |
1004 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) |
1005 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) |
1006 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) |
1007 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) |
1008 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) |
1009 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) |
1010 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); |
1011 | |
1012 | dev_dbg(&port->dev, "%s - 0x%04X\n" , __func__, result); |
1013 | |
1014 | return result; |
1015 | } |
1016 | |
1017 | static int mos7840_tiocmset(struct tty_struct *tty, |
1018 | unsigned int set, unsigned int clear) |
1019 | { |
1020 | struct usb_serial_port *port = tty->driver_data; |
1021 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
1022 | unsigned int mcr; |
1023 | int status; |
1024 | |
1025 | /* FIXME: What locks the port registers ? */ |
1026 | mcr = mos7840_port->shadowMCR; |
1027 | if (clear & TIOCM_RTS) |
1028 | mcr &= ~MCR_RTS; |
1029 | if (clear & TIOCM_DTR) |
1030 | mcr &= ~MCR_DTR; |
1031 | if (clear & TIOCM_LOOP) |
1032 | mcr &= ~MCR_LOOPBACK; |
1033 | |
1034 | if (set & TIOCM_RTS) |
1035 | mcr |= MCR_RTS; |
1036 | if (set & TIOCM_DTR) |
1037 | mcr |= MCR_DTR; |
1038 | if (set & TIOCM_LOOP) |
1039 | mcr |= MCR_LOOPBACK; |
1040 | |
1041 | mos7840_port->shadowMCR = mcr; |
1042 | |
1043 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: mcr); |
1044 | if (status < 0) { |
1045 | dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n" ); |
1046 | return status; |
1047 | } |
1048 | |
1049 | return 0; |
1050 | } |
1051 | |
1052 | /***************************************************************************** |
1053 | * mos7840_calc_baud_rate_divisor |
1054 | * this function calculates the proper baud rate divisor for the specified |
1055 | * baud rate. |
1056 | *****************************************************************************/ |
1057 | static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, |
1058 | int baudRate, int *divisor, |
1059 | __u16 *clk_sel_val) |
1060 | { |
1061 | dev_dbg(&port->dev, "%s - %d\n" , __func__, baudRate); |
1062 | |
1063 | if (baudRate <= 115200) { |
1064 | *divisor = 115200 / baudRate; |
1065 | *clk_sel_val = 0x0; |
1066 | } |
1067 | if ((baudRate > 115200) && (baudRate <= 230400)) { |
1068 | *divisor = 230400 / baudRate; |
1069 | *clk_sel_val = 0x10; |
1070 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { |
1071 | *divisor = 403200 / baudRate; |
1072 | *clk_sel_val = 0x20; |
1073 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { |
1074 | *divisor = 460800 / baudRate; |
1075 | *clk_sel_val = 0x30; |
1076 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { |
1077 | *divisor = 806400 / baudRate; |
1078 | *clk_sel_val = 0x40; |
1079 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { |
1080 | *divisor = 921600 / baudRate; |
1081 | *clk_sel_val = 0x50; |
1082 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { |
1083 | *divisor = 1572864 / baudRate; |
1084 | *clk_sel_val = 0x60; |
1085 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { |
1086 | *divisor = 3145728 / baudRate; |
1087 | *clk_sel_val = 0x70; |
1088 | } |
1089 | return 0; |
1090 | } |
1091 | |
1092 | /***************************************************************************** |
1093 | * mos7840_send_cmd_write_baud_rate |
1094 | * this function sends the proper command to change the baud rate of the |
1095 | * specified port. |
1096 | *****************************************************************************/ |
1097 | |
1098 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, |
1099 | int baudRate) |
1100 | { |
1101 | struct usb_serial_port *port = mos7840_port->port; |
1102 | int divisor = 0; |
1103 | int status; |
1104 | __u16 Data; |
1105 | __u16 clk_sel_val; |
1106 | |
1107 | dev_dbg(&port->dev, "%s - baud = %d\n" , __func__, baudRate); |
1108 | /* reset clk_uart_sel in spregOffset */ |
1109 | if (baudRate > 115200) { |
1110 | #ifdef HW_flow_control |
1111 | /* NOTE: need to see the pther register to modify */ |
1112 | /* setting h/w flow control bit to 1 */ |
1113 | Data = 0x2b; |
1114 | mos7840_port->shadowMCR = Data; |
1115 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1116 | Data); |
1117 | if (status < 0) { |
1118 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n" ); |
1119 | return -1; |
1120 | } |
1121 | #endif |
1122 | |
1123 | } else { |
1124 | #ifdef HW_flow_control |
1125 | /* setting h/w flow control bit to 0 */ |
1126 | Data = 0xb; |
1127 | mos7840_port->shadowMCR = Data; |
1128 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1129 | Data); |
1130 | if (status < 0) { |
1131 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n" ); |
1132 | return -1; |
1133 | } |
1134 | #endif |
1135 | |
1136 | } |
1137 | |
1138 | if (1) { /* baudRate <= 115200) */ |
1139 | clk_sel_val = 0x0; |
1140 | Data = 0x0; |
1141 | status = mos7840_calc_baud_rate_divisor(port, baudRate, divisor: &divisor, |
1142 | clk_sel_val: &clk_sel_val); |
1143 | status = mos7840_get_reg_sync(port, reg: mos7840_port->SpRegOffset, |
1144 | val: &Data); |
1145 | if (status < 0) { |
1146 | dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n" ); |
1147 | return -1; |
1148 | } |
1149 | Data = (Data & 0x8f) | clk_sel_val; |
1150 | status = mos7840_set_reg_sync(port, reg: mos7840_port->SpRegOffset, |
1151 | val: Data); |
1152 | if (status < 0) { |
1153 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n" ); |
1154 | return -1; |
1155 | } |
1156 | /* Calculate the Divisor */ |
1157 | |
1158 | if (status) { |
1159 | dev_err(&port->dev, "%s - bad baud rate\n" , __func__); |
1160 | return status; |
1161 | } |
1162 | /* Enable access to divisor latch */ |
1163 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; |
1164 | mos7840_port->shadowLCR = Data; |
1165 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
1166 | |
1167 | /* Write the divisor */ |
1168 | Data = (unsigned char)(divisor & 0xff); |
1169 | dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n" , Data); |
1170 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, val: Data); |
1171 | |
1172 | Data = (unsigned char)((divisor & 0xff00) >> 8); |
1173 | dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n" , Data); |
1174 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, val: Data); |
1175 | |
1176 | /* Disable access to divisor latch */ |
1177 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; |
1178 | mos7840_port->shadowLCR = Data; |
1179 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
1180 | |
1181 | } |
1182 | return status; |
1183 | } |
1184 | |
1185 | /***************************************************************************** |
1186 | * mos7840_change_port_settings |
1187 | * This routine is called to set the UART on the device to match |
1188 | * the specified new settings. |
1189 | *****************************************************************************/ |
1190 | |
1191 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1192 | struct moschip_port *mos7840_port, |
1193 | const struct ktermios *old_termios) |
1194 | { |
1195 | struct usb_serial_port *port = mos7840_port->port; |
1196 | int baud; |
1197 | unsigned cflag; |
1198 | __u8 lData; |
1199 | __u8 lParity; |
1200 | __u8 lStop; |
1201 | int status; |
1202 | __u16 Data; |
1203 | |
1204 | lData = LCR_BITS_8; |
1205 | lStop = LCR_STOP_1; |
1206 | lParity = LCR_PAR_NONE; |
1207 | |
1208 | cflag = tty->termios.c_cflag; |
1209 | |
1210 | /* Change the number of bits */ |
1211 | switch (cflag & CSIZE) { |
1212 | case CS5: |
1213 | lData = LCR_BITS_5; |
1214 | break; |
1215 | |
1216 | case CS6: |
1217 | lData = LCR_BITS_6; |
1218 | break; |
1219 | |
1220 | case CS7: |
1221 | lData = LCR_BITS_7; |
1222 | break; |
1223 | |
1224 | default: |
1225 | case CS8: |
1226 | lData = LCR_BITS_8; |
1227 | break; |
1228 | } |
1229 | |
1230 | /* Change the Parity bit */ |
1231 | if (cflag & PARENB) { |
1232 | if (cflag & PARODD) { |
1233 | lParity = LCR_PAR_ODD; |
1234 | dev_dbg(&port->dev, "%s - parity = odd\n" , __func__); |
1235 | } else { |
1236 | lParity = LCR_PAR_EVEN; |
1237 | dev_dbg(&port->dev, "%s - parity = even\n" , __func__); |
1238 | } |
1239 | |
1240 | } else { |
1241 | dev_dbg(&port->dev, "%s - parity = none\n" , __func__); |
1242 | } |
1243 | |
1244 | if (cflag & CMSPAR) |
1245 | lParity = lParity | 0x20; |
1246 | |
1247 | /* Change the Stop bit */ |
1248 | if (cflag & CSTOPB) { |
1249 | lStop = LCR_STOP_2; |
1250 | dev_dbg(&port->dev, "%s - stop bits = 2\n" , __func__); |
1251 | } else { |
1252 | lStop = LCR_STOP_1; |
1253 | dev_dbg(&port->dev, "%s - stop bits = 1\n" , __func__); |
1254 | } |
1255 | |
1256 | /* Update the LCR with the correct value */ |
1257 | mos7840_port->shadowLCR &= |
1258 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
1259 | mos7840_port->shadowLCR |= (lData | lParity | lStop); |
1260 | |
1261 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n" , __func__, |
1262 | mos7840_port->shadowLCR); |
1263 | /* Disable Interrupts */ |
1264 | Data = 0x00; |
1265 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, val: Data); |
1266 | |
1267 | Data = 0x00; |
1268 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, val: Data); |
1269 | |
1270 | Data = 0xcf; |
1271 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, val: Data); |
1272 | |
1273 | /* Send the updated LCR value to the mos7840 */ |
1274 | Data = mos7840_port->shadowLCR; |
1275 | |
1276 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, val: Data); |
1277 | |
1278 | Data = 0x00b; |
1279 | mos7840_port->shadowMCR = Data; |
1280 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: Data); |
1281 | Data = 0x00b; |
1282 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: Data); |
1283 | |
1284 | /* set up the MCR register and send it to the mos7840 */ |
1285 | |
1286 | mos7840_port->shadowMCR = MCR_MASTER_IE; |
1287 | if (cflag & CBAUD) |
1288 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
1289 | |
1290 | if (cflag & CRTSCTS) |
1291 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
1292 | else |
1293 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
1294 | |
1295 | Data = mos7840_port->shadowMCR; |
1296 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, val: Data); |
1297 | |
1298 | /* Determine divisor based on baud rate */ |
1299 | baud = tty_get_baud_rate(tty); |
1300 | |
1301 | if (!baud) { |
1302 | /* pick a default, any default... */ |
1303 | dev_dbg(&port->dev, "%s" , "Picked default baud...\n" ); |
1304 | baud = 9600; |
1305 | } |
1306 | |
1307 | dev_dbg(&port->dev, "%s - baud rate = %d\n" , __func__, baud); |
1308 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baudRate: baud); |
1309 | |
1310 | /* Enable Interrupts */ |
1311 | Data = 0x0c; |
1312 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, val: Data); |
1313 | |
1314 | if (!mos7840_port->read_urb_busy) { |
1315 | mos7840_port->read_urb_busy = true; |
1316 | status = usb_submit_urb(urb: mos7840_port->read_urb, GFP_KERNEL); |
1317 | if (status) { |
1318 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n" , |
1319 | status); |
1320 | mos7840_port->read_urb_busy = false; |
1321 | } |
1322 | } |
1323 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n" , __func__, |
1324 | mos7840_port->shadowLCR); |
1325 | } |
1326 | |
1327 | /***************************************************************************** |
1328 | * mos7840_set_termios |
1329 | * this function is called by the tty driver when it wants to change |
1330 | * the termios structure |
1331 | *****************************************************************************/ |
1332 | |
1333 | static void mos7840_set_termios(struct tty_struct *tty, |
1334 | struct usb_serial_port *port, |
1335 | const struct ktermios *old_termios) |
1336 | { |
1337 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
1338 | int status; |
1339 | |
1340 | /* change the port settings to the new ones specified */ |
1341 | |
1342 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
1343 | |
1344 | if (!mos7840_port->read_urb_busy) { |
1345 | mos7840_port->read_urb_busy = true; |
1346 | status = usb_submit_urb(urb: mos7840_port->read_urb, GFP_KERNEL); |
1347 | if (status) { |
1348 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n" , |
1349 | status); |
1350 | mos7840_port->read_urb_busy = false; |
1351 | } |
1352 | } |
1353 | } |
1354 | |
1355 | /***************************************************************************** |
1356 | * mos7840_get_lsr_info - get line status register info |
1357 | * |
1358 | * Purpose: Let user call ioctl() to get info when the UART physically |
1359 | * is emptied. On bus types like RS485, the transmitter must |
1360 | * release the bus after transmitting. This must be done when |
1361 | * the transmit shift register is empty, not be done when the |
1362 | * transmit holding register is empty. This functionality |
1363 | * allows an RS485 driver to be written in user space. |
1364 | *****************************************************************************/ |
1365 | |
1366 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
1367 | unsigned int __user *value) |
1368 | { |
1369 | int count; |
1370 | unsigned int result = 0; |
1371 | |
1372 | count = mos7840_chars_in_buffer(tty); |
1373 | if (count == 0) |
1374 | result = TIOCSER_TEMT; |
1375 | |
1376 | if (copy_to_user(to: value, from: &result, n: sizeof(int))) |
1377 | return -EFAULT; |
1378 | return 0; |
1379 | } |
1380 | |
1381 | /***************************************************************************** |
1382 | * SerialIoctl |
1383 | * this function handles any ioctl calls to the driver |
1384 | *****************************************************************************/ |
1385 | |
1386 | static int mos7840_ioctl(struct tty_struct *tty, |
1387 | unsigned int cmd, unsigned long arg) |
1388 | { |
1389 | struct usb_serial_port *port = tty->driver_data; |
1390 | void __user *argp = (void __user *)arg; |
1391 | |
1392 | switch (cmd) { |
1393 | /* return number of bytes available */ |
1394 | |
1395 | case TIOCSERGETLSR: |
1396 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n" , __func__); |
1397 | return mos7840_get_lsr_info(tty, value: argp); |
1398 | |
1399 | default: |
1400 | break; |
1401 | } |
1402 | return -ENOIOCTLCMD; |
1403 | } |
1404 | |
1405 | /* |
1406 | * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX |
1407 | * for MCS7810 by bit-banging a 16-bit word. |
1408 | * |
1409 | * Note that GPO is really RTS of the third port so this will toggle RTS of |
1410 | * port two or three on two- and four-port devices. |
1411 | */ |
1412 | static int mos7810_check(struct usb_serial *serial) |
1413 | { |
1414 | int i, pass_count = 0; |
1415 | u8 *buf; |
1416 | __u16 data = 0, mcr_data = 0; |
1417 | __u16 test_pattern = 0x55AA; |
1418 | int res; |
1419 | |
1420 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); |
1421 | if (!buf) |
1422 | return 0; /* failed to identify 7810 */ |
1423 | |
1424 | /* Store MCR setting */ |
1425 | res = usb_control_msg(dev: serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
1426 | MCS_RDREQ, MCS_RD_RTYPE, value: 0x0300, MODEM_CONTROL_REGISTER, |
1427 | data: buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); |
1428 | if (res == VENDOR_READ_LENGTH) |
1429 | mcr_data = *buf; |
1430 | |
1431 | for (i = 0; i < 16; i++) { |
1432 | /* Send the 1-bit test pattern out to MCS7810 test pin */ |
1433 | usb_control_msg(dev: serial->dev, usb_sndctrlpipe(serial->dev, 0), |
1434 | MCS_WRREQ, MCS_WR_RTYPE, |
1435 | value: (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), |
1436 | MODEM_CONTROL_REGISTER, NULL, size: 0, MOS_WDR_TIMEOUT); |
1437 | |
1438 | /* Read the test pattern back */ |
1439 | res = usb_control_msg(dev: serial->dev, |
1440 | usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, |
1441 | MCS_RD_RTYPE, value: 0, GPIO_REGISTER, data: buf, |
1442 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); |
1443 | if (res == VENDOR_READ_LENGTH) |
1444 | data = *buf; |
1445 | |
1446 | /* If this is a MCS7810 device, both test patterns must match */ |
1447 | if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) |
1448 | break; |
1449 | |
1450 | pass_count++; |
1451 | } |
1452 | |
1453 | /* Restore MCR setting */ |
1454 | usb_control_msg(dev: serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, |
1455 | MCS_WR_RTYPE, value: 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, |
1456 | size: 0, MOS_WDR_TIMEOUT); |
1457 | |
1458 | kfree(objp: buf); |
1459 | |
1460 | if (pass_count == 16) |
1461 | return 1; |
1462 | |
1463 | return 0; |
1464 | } |
1465 | |
1466 | static int mos7840_probe(struct usb_serial *serial, |
1467 | const struct usb_device_id *id) |
1468 | { |
1469 | unsigned long device_flags = id->driver_info; |
1470 | u8 *buf; |
1471 | |
1472 | /* Skip device-type detection if we already have device flags. */ |
1473 | if (device_flags) |
1474 | goto out; |
1475 | |
1476 | buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); |
1477 | if (!buf) |
1478 | return -ENOMEM; |
1479 | |
1480 | usb_control_msg(dev: serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
1481 | MCS_RDREQ, MCS_RD_RTYPE, value: 0, GPIO_REGISTER, data: buf, |
1482 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); |
1483 | |
1484 | /* For a MCS7840 device GPIO0 must be set to 1 */ |
1485 | if (buf[0] & 0x01) |
1486 | device_flags = MCS_PORTS(4); |
1487 | else if (mos7810_check(serial)) |
1488 | device_flags = MCS_PORTS(1) | MCS_LED; |
1489 | else |
1490 | device_flags = MCS_PORTS(2); |
1491 | |
1492 | kfree(objp: buf); |
1493 | out: |
1494 | usb_set_serial_data(serial, data: (void *)device_flags); |
1495 | |
1496 | return 0; |
1497 | } |
1498 | |
1499 | static int mos7840_calc_num_ports(struct usb_serial *serial, |
1500 | struct usb_serial_endpoints *epds) |
1501 | { |
1502 | unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); |
1503 | int num_ports = MCS_PORTS(device_flags); |
1504 | |
1505 | if (num_ports == 0 || num_ports > 4) |
1506 | return -ENODEV; |
1507 | |
1508 | if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { |
1509 | dev_err(&serial->interface->dev, "missing endpoints\n" ); |
1510 | return -ENODEV; |
1511 | } |
1512 | |
1513 | return num_ports; |
1514 | } |
1515 | |
1516 | static int mos7840_attach(struct usb_serial *serial) |
1517 | { |
1518 | struct device *dev = &serial->interface->dev; |
1519 | int status; |
1520 | u16 val; |
1521 | |
1522 | /* Zero Length flag enable */ |
1523 | val = 0x0f; |
1524 | status = mos7840_set_reg_sync(port: serial->port[0], ZLP_REG5, val); |
1525 | if (status < 0) |
1526 | dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n" , status); |
1527 | else |
1528 | dev_dbg(dev, "ZLP_REG5 Writing success status%d\n" , status); |
1529 | |
1530 | return status; |
1531 | } |
1532 | |
1533 | static int mos7840_port_probe(struct usb_serial_port *port) |
1534 | { |
1535 | struct usb_serial *serial = port->serial; |
1536 | unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); |
1537 | struct moschip_port *mos7840_port; |
1538 | int status; |
1539 | int pnum; |
1540 | __u16 Data; |
1541 | |
1542 | /* we set up the pointers to the endpoints in the mos7840_open * |
1543 | * function, as the structures aren't created yet. */ |
1544 | |
1545 | pnum = port->port_number; |
1546 | |
1547 | dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n" , pnum); |
1548 | mos7840_port = kzalloc(size: sizeof(struct moschip_port), GFP_KERNEL); |
1549 | if (!mos7840_port) |
1550 | return -ENOMEM; |
1551 | |
1552 | /* Initialize all port interrupt end point to port 0 int |
1553 | * endpoint. Our device has only one interrupt end point |
1554 | * common to all port */ |
1555 | |
1556 | mos7840_port->port = port; |
1557 | spin_lock_init(&mos7840_port->pool_lock); |
1558 | |
1559 | /* minor is not initialised until later by |
1560 | * usb-serial.c:get_free_serial() and cannot therefore be used |
1561 | * to index device instances */ |
1562 | mos7840_port->port_num = pnum + 1; |
1563 | dev_dbg(&port->dev, "port->minor = %d\n" , port->minor); |
1564 | dev_dbg(&port->dev, "mos7840_port->port_num = %d\n" , mos7840_port->port_num); |
1565 | |
1566 | if (mos7840_port->port_num == 1) { |
1567 | mos7840_port->SpRegOffset = 0x0; |
1568 | mos7840_port->ControlRegOffset = 0x1; |
1569 | mos7840_port->DcrRegOffset = 0x4; |
1570 | } else { |
1571 | u8 phy_num = mos7840_port->port_num; |
1572 | |
1573 | /* Port 2 in the 2-port case uses registers of port 3 */ |
1574 | if (serial->num_ports == 2) |
1575 | phy_num = 3; |
1576 | |
1577 | mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2); |
1578 | mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2); |
1579 | mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2); |
1580 | } |
1581 | mos7840_dump_serial_port(port, mos7840_port); |
1582 | usb_set_serial_port_data(port, data: mos7840_port); |
1583 | |
1584 | /* enable rx_disable bit in control register */ |
1585 | status = mos7840_get_reg_sync(port, |
1586 | reg: mos7840_port->ControlRegOffset, val: &Data); |
1587 | if (status < 0) { |
1588 | dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n" , status); |
1589 | goto error; |
1590 | } else |
1591 | dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n" , Data, status); |
1592 | Data |= 0x08; /* setting driver done bit */ |
1593 | Data |= 0x04; /* sp1_bit to have cts change reflect in |
1594 | modem status reg */ |
1595 | |
1596 | /* Data |= 0x20; //rx_disable bit */ |
1597 | status = mos7840_set_reg_sync(port, |
1598 | reg: mos7840_port->ControlRegOffset, val: Data); |
1599 | if (status < 0) { |
1600 | dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n" , status); |
1601 | goto error; |
1602 | } else |
1603 | dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n" , status); |
1604 | |
1605 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
1606 | and 0x24 in DCR3 */ |
1607 | Data = 0x01; |
1608 | status = mos7840_set_reg_sync(port, |
1609 | reg: (__u16) (mos7840_port->DcrRegOffset + 0), val: Data); |
1610 | if (status < 0) { |
1611 | dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n" , status); |
1612 | goto error; |
1613 | } else |
1614 | dev_dbg(&port->dev, "DCR0 Writing success status%d\n" , status); |
1615 | |
1616 | Data = 0x05; |
1617 | status = mos7840_set_reg_sync(port, |
1618 | reg: (__u16) (mos7840_port->DcrRegOffset + 1), val: Data); |
1619 | if (status < 0) { |
1620 | dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n" , status); |
1621 | goto error; |
1622 | } else |
1623 | dev_dbg(&port->dev, "DCR1 Writing success status%d\n" , status); |
1624 | |
1625 | Data = 0x24; |
1626 | status = mos7840_set_reg_sync(port, |
1627 | reg: (__u16) (mos7840_port->DcrRegOffset + 2), val: Data); |
1628 | if (status < 0) { |
1629 | dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n" , status); |
1630 | goto error; |
1631 | } else |
1632 | dev_dbg(&port->dev, "DCR2 Writing success status%d\n" , status); |
1633 | |
1634 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
1635 | Data = 0x0; |
1636 | status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, val: Data); |
1637 | if (status < 0) { |
1638 | dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n" , status); |
1639 | goto error; |
1640 | } else |
1641 | dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n" , status); |
1642 | |
1643 | Data = 0x20; |
1644 | status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, val: Data); |
1645 | if (status < 0) { |
1646 | dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n" , status); |
1647 | goto error; |
1648 | } else |
1649 | dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n" , status); |
1650 | |
1651 | /* write value 0x0 to scratchpad register */ |
1652 | Data = 0x00; |
1653 | status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, val: Data); |
1654 | if (status < 0) { |
1655 | dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n" , status); |
1656 | goto error; |
1657 | } else |
1658 | dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n" , status); |
1659 | |
1660 | /* Zero Length flag register */ |
1661 | if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { |
1662 | Data = 0xff; |
1663 | status = mos7840_set_reg_sync(port, |
1664 | reg: (__u16) (ZLP_REG1 + |
1665 | ((__u16)mos7840_port->port_num)), val: Data); |
1666 | dev_dbg(&port->dev, "ZLIP offset %x\n" , |
1667 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); |
1668 | if (status < 0) { |
1669 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n" , pnum + 2, status); |
1670 | goto error; |
1671 | } else |
1672 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n" , pnum + 2, status); |
1673 | } else { |
1674 | Data = 0xff; |
1675 | status = mos7840_set_reg_sync(port, |
1676 | reg: (__u16) (ZLP_REG1 + |
1677 | ((__u16)mos7840_port->port_num) - 0x1), val: Data); |
1678 | dev_dbg(&port->dev, "ZLIP offset %x\n" , |
1679 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); |
1680 | if (status < 0) { |
1681 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n" , pnum + 1, status); |
1682 | goto error; |
1683 | } else |
1684 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n" , pnum + 1, status); |
1685 | |
1686 | } |
1687 | |
1688 | mos7840_port->has_led = device_flags & MCS_LED; |
1689 | |
1690 | /* Initialize LED timers */ |
1691 | if (mos7840_port->has_led) { |
1692 | mos7840_port->led_urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1693 | mos7840_port->led_dr = kmalloc(size: sizeof(*mos7840_port->led_dr), |
1694 | GFP_KERNEL); |
1695 | if (!mos7840_port->led_urb || !mos7840_port->led_dr) { |
1696 | status = -ENOMEM; |
1697 | goto error; |
1698 | } |
1699 | |
1700 | timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0); |
1701 | mos7840_port->led_timer1.expires = |
1702 | jiffies + msecs_to_jiffies(LED_ON_MS); |
1703 | timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off, |
1704 | 0); |
1705 | mos7840_port->led_timer2.expires = |
1706 | jiffies + msecs_to_jiffies(LED_OFF_MS); |
1707 | |
1708 | /* Turn off LED */ |
1709 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, val: 0x0300); |
1710 | } |
1711 | |
1712 | return 0; |
1713 | error: |
1714 | kfree(objp: mos7840_port->led_dr); |
1715 | usb_free_urb(urb: mos7840_port->led_urb); |
1716 | kfree(objp: mos7840_port); |
1717 | |
1718 | return status; |
1719 | } |
1720 | |
1721 | static void mos7840_port_remove(struct usb_serial_port *port) |
1722 | { |
1723 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); |
1724 | |
1725 | if (mos7840_port->has_led) { |
1726 | /* Turn off LED */ |
1727 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, val: 0x0300); |
1728 | |
1729 | timer_shutdown_sync(timer: &mos7840_port->led_timer1); |
1730 | timer_shutdown_sync(timer: &mos7840_port->led_timer2); |
1731 | |
1732 | usb_kill_urb(urb: mos7840_port->led_urb); |
1733 | usb_free_urb(urb: mos7840_port->led_urb); |
1734 | kfree(objp: mos7840_port->led_dr); |
1735 | } |
1736 | |
1737 | kfree(objp: mos7840_port); |
1738 | } |
1739 | |
1740 | static struct usb_serial_driver moschip7840_4port_device = { |
1741 | .driver = { |
1742 | .owner = THIS_MODULE, |
1743 | .name = "mos7840" , |
1744 | }, |
1745 | .description = DRIVER_DESC, |
1746 | .id_table = id_table, |
1747 | .num_interrupt_in = 1, |
1748 | .open = mos7840_open, |
1749 | .close = mos7840_close, |
1750 | .write = mos7840_write, |
1751 | .write_room = mos7840_write_room, |
1752 | .chars_in_buffer = mos7840_chars_in_buffer, |
1753 | .throttle = mos7840_throttle, |
1754 | .unthrottle = mos7840_unthrottle, |
1755 | .calc_num_ports = mos7840_calc_num_ports, |
1756 | .probe = mos7840_probe, |
1757 | .attach = mos7840_attach, |
1758 | .ioctl = mos7840_ioctl, |
1759 | .set_termios = mos7840_set_termios, |
1760 | .break_ctl = mos7840_break, |
1761 | .tiocmget = mos7840_tiocmget, |
1762 | .tiocmset = mos7840_tiocmset, |
1763 | .get_icount = usb_serial_generic_get_icount, |
1764 | .port_probe = mos7840_port_probe, |
1765 | .port_remove = mos7840_port_remove, |
1766 | .read_bulk_callback = mos7840_bulk_in_callback, |
1767 | }; |
1768 | |
1769 | static struct usb_serial_driver * const serial_drivers[] = { |
1770 | &moschip7840_4port_device, NULL |
1771 | }; |
1772 | |
1773 | module_usb_serial_driver(serial_drivers, id_table); |
1774 | |
1775 | MODULE_DESCRIPTION(DRIVER_DESC); |
1776 | MODULE_LICENSE("GPL" ); |
1777 | |