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3f542974 PS |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
15 | * | |
16 | * Clean ups from Moschip version and a few ioctl implementations by: | |
17 | * Paul B Schroeder <pschroeder "at" uplogix "dot" com> | |
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 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/slab.h> | |
405f5571 | 29 | #include <linux/smp_lock.h> |
3f542974 PS |
30 | #include <linux/tty.h> |
31 | #include <linux/tty_driver.h> | |
32 | #include <linux/tty_flip.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/serial.h> | |
35 | #include <linux/usb.h> | |
36 | #include <linux/usb/serial.h> | |
880af9db | 37 | #include <linux/uaccess.h> |
3f542974 PS |
38 | |
39 | /* | |
40 | * Version Information | |
41 | */ | |
37768adf | 42 | #define DRIVER_VERSION "1.3.2" |
3f542974 PS |
43 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
44 | ||
45 | /* | |
46 | * 16C50 UART register defines | |
47 | */ | |
48 | ||
49 | #define LCR_BITS_5 0x00 /* 5 bits/char */ | |
50 | #define LCR_BITS_6 0x01 /* 6 bits/char */ | |
51 | #define LCR_BITS_7 0x02 /* 7 bits/char */ | |
52 | #define LCR_BITS_8 0x03 /* 8 bits/char */ | |
53 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
54 | ||
55 | #define LCR_STOP_1 0x00 /* 1 stop bit */ | |
56 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ | |
57 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ | |
58 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
59 | ||
60 | #define LCR_PAR_NONE 0x00 /* No parity */ | |
61 | #define LCR_PAR_ODD 0x08 /* Odd parity */ | |
62 | #define LCR_PAR_EVEN 0x18 /* Even parity */ | |
63 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ | |
64 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ | |
65 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
66 | ||
67 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ | |
68 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ | |
69 | ||
70 | #define MCR_DTR 0x01 /* Assert DTR */ | |
71 | #define MCR_RTS 0x02 /* Assert RTS */ | |
72 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ | |
73 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ | |
74 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ | |
75 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ | |
76 | ||
77 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ | |
78 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ | |
79 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ | |
80 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ | |
81 | ||
82 | /* | |
83 | * Defines used for sending commands to port | |
84 | */ | |
85 | ||
880af9db AC |
86 | #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ |
87 | #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ | |
3f542974 PS |
88 | |
89 | #define MOS_PORT1 0x0200 | |
90 | #define MOS_PORT2 0x0300 | |
91 | #define MOS_VENREG 0x0000 | |
92 | #define MOS_MAX_PORT 0x02 | |
93 | #define MOS_WRITE 0x0E | |
94 | #define MOS_READ 0x0D | |
95 | ||
96 | /* Requests */ | |
97 | #define MCS_RD_RTYPE 0xC0 | |
98 | #define MCS_WR_RTYPE 0x40 | |
99 | #define MCS_RDREQ 0x0D | |
100 | #define MCS_WRREQ 0x0E | |
101 | #define MCS_CTRL_TIMEOUT 500 | |
102 | #define VENDOR_READ_LENGTH (0x01) | |
103 | ||
104 | #define MAX_NAME_LEN 64 | |
105 | ||
880af9db AC |
106 | #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
107 | #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ | |
3f542974 PS |
108 | |
109 | /* For higher baud Rates use TIOCEXBAUD */ | |
110 | #define TIOCEXBAUD 0x5462 | |
111 | ||
112 | /* vendor id and device id defines */ | |
113 | ||
11e1abb4 | 114 | /* The native mos7840/7820 component */ |
3f542974 PS |
115 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
116 | #define MOSCHIP_DEVICE_ID_7840 0x7840 | |
117 | #define MOSCHIP_DEVICE_ID_7820 0x7820 | |
11e1abb4 DL |
118 | /* The native component can have its vendor/device id's overridden |
119 | * in vendor-specific implementations. Such devices can be handled | |
120 | * by making a change here, in moschip_port_id_table, and in | |
121 | * moschip_id_table_combined | |
122 | */ | |
123 | #define USB_VENDOR_ID_BANDB 0x0856 | |
acf509ae CB |
124 | #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 |
125 | #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 | |
126 | #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 | |
127 | #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 | |
128 | #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 | |
129 | #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 | |
11e1abb4 | 130 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 |
acf509ae | 131 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 |
3f542974 | 132 | |
9d498bea RL |
133 | /* This driver also supports |
134 | * ATEN UC2324 device using Moschip MCS7840 | |
135 | * ATEN UC2322 device using Moschip MCS7820 | |
136 | */ | |
e9b8cffa TC |
137 | #define USB_VENDOR_ID_ATENINTL 0x0557 |
138 | #define ATENINTL_DEVICE_ID_UC2324 0x2011 | |
9d498bea | 139 | #define ATENINTL_DEVICE_ID_UC2322 0x7820 |
e9b8cffa | 140 | |
11e1abb4 | 141 | /* Interrupt Routine Defines */ |
3f542974 PS |
142 | |
143 | #define SERIAL_IIR_RLS 0x06 | |
144 | #define SERIAL_IIR_MS 0x00 | |
145 | ||
146 | /* | |
147 | * Emulation of the bit mask on the LINE STATUS REGISTER. | |
148 | */ | |
149 | #define SERIAL_LSR_DR 0x0001 | |
150 | #define SERIAL_LSR_OE 0x0002 | |
151 | #define SERIAL_LSR_PE 0x0004 | |
152 | #define SERIAL_LSR_FE 0x0008 | |
153 | #define SERIAL_LSR_BI 0x0010 | |
154 | ||
155 | #define MOS_MSR_DELTA_CTS 0x10 | |
156 | #define MOS_MSR_DELTA_DSR 0x20 | |
157 | #define MOS_MSR_DELTA_RI 0x40 | |
158 | #define MOS_MSR_DELTA_CD 0x80 | |
159 | ||
880af9db | 160 | /* Serial Port register Address */ |
3f542974 PS |
161 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
162 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) | |
163 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) | |
164 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) | |
165 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) | |
166 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) | |
167 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) | |
168 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) | |
169 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) | |
170 | ||
171 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) | |
172 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) | |
173 | ||
174 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) | |
175 | ||
176 | /* | |
177 | * URB POOL related defines | |
178 | */ | |
179 | #define NUM_URBS 16 /* URB Count */ | |
180 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
181 | ||
182 | ||
183 | static struct usb_device_id moschip_port_id_table[] = { | |
184 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, | |
185 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae CB |
186 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
187 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, | |
188 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, | |
189 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
190 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
191 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 192 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
acf509ae | 193 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
e9b8cffa | 194 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 195 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
196 | {} /* terminating entry */ |
197 | }; | |
198 | ||
199 | static __devinitdata struct usb_device_id moschip_id_table_combined[] = { | |
200 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, | |
201 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae CB |
202 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
203 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, | |
204 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, | |
205 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
206 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
207 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 208 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
acf509ae | 209 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
e9b8cffa | 210 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 211 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
212 | {} /* terminating entry */ |
213 | }; | |
214 | ||
215 | MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); | |
216 | ||
217 | /* This structure holds all of the local port information */ | |
218 | ||
219 | struct moschip_port { | |
220 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
221 | struct urb *write_urb; /* write URB for this port */ | |
222 | struct urb *read_urb; /* read URB for this port */ | |
0de9a702 | 223 | struct urb *int_urb; |
3f542974 PS |
224 | __u8 shadowLCR; /* last LCR value received */ |
225 | __u8 shadowMCR; /* last MCR value received */ | |
226 | char open; | |
0de9a702 ON |
227 | char open_ports; |
228 | char zombie; | |
3f542974 PS |
229 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
230 | wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ | |
231 | int delta_msr_cond; | |
232 | struct async_icount icount; | |
233 | struct usb_serial_port *port; /* loop back to the owner of this object */ | |
234 | ||
880af9db | 235 | /* Offsets */ |
3f542974 PS |
236 | __u8 SpRegOffset; |
237 | __u8 ControlRegOffset; | |
238 | __u8 DcrRegOffset; | |
880af9db | 239 | /* for processing control URBS in interrupt context */ |
3f542974 | 240 | struct urb *control_urb; |
0de9a702 | 241 | struct usb_ctrlrequest *dr; |
3f542974 PS |
242 | char *ctrl_buf; |
243 | int MsrLsr; | |
244 | ||
0de9a702 | 245 | spinlock_t pool_lock; |
3f542974 | 246 | struct urb *write_urb_pool[NUM_URBS]; |
0de9a702 | 247 | char busy[NUM_URBS]; |
50de36f7 | 248 | bool read_urb_busy; |
3f542974 PS |
249 | }; |
250 | ||
251 | ||
252 | static int debug; | |
3f542974 PS |
253 | |
254 | /* | |
255 | * mos7840_set_reg_sync | |
256 | * To set the Control register by calling usb_fill_control_urb function | |
257 | * by passing usb_sndctrlpipe function as parameter. | |
258 | */ | |
259 | ||
260 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
261 | __u16 val) | |
262 | { | |
263 | struct usb_device *dev = port->serial->dev; | |
264 | val = val & 0x00ff; | |
84fe6e79 | 265 | dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); |
3f542974 PS |
266 | |
267 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
268 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
269 | MOS_WDR_TIMEOUT); | |
270 | } | |
271 | ||
272 | /* | |
273 | * mos7840_get_reg_sync | |
274 | * To set the Uart register by calling usb_fill_control_urb function by | |
275 | * passing usb_rcvctrlpipe function as parameter. | |
276 | */ | |
277 | ||
278 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
880af9db | 279 | __u16 *val) |
3f542974 PS |
280 | { |
281 | struct usb_device *dev = port->serial->dev; | |
282 | int ret = 0; | |
283 | ||
284 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
285 | MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, | |
286 | MOS_WDR_TIMEOUT); | |
84fe6e79 | 287 | dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); |
3f542974 PS |
288 | *val = (*val) & 0x00ff; |
289 | return ret; | |
290 | } | |
291 | ||
292 | /* | |
293 | * mos7840_set_uart_reg | |
294 | * To set the Uart register by calling usb_fill_control_urb function by | |
295 | * passing usb_sndctrlpipe function as parameter. | |
296 | */ | |
297 | ||
298 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
299 | __u16 val) | |
300 | { | |
301 | ||
302 | struct usb_device *dev = port->serial->dev; | |
303 | val = val & 0x00ff; | |
880af9db AC |
304 | /* For the UART control registers, the application number need |
305 | to be Or'ed */ | |
0de9a702 | 306 | if (port->serial->num_ports == 4) { |
880af9db AC |
307 | val |= (((__u16) port->number - |
308 | (__u16) (port->serial->minor)) + 1) << 8; | |
84fe6e79 | 309 | dbg("mos7840_set_uart_reg application number is %x", val); |
3f542974 PS |
310 | } else { |
311 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 312 | val |= (((__u16) port->number - |
3f542974 | 313 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 314 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
315 | val); |
316 | } else { | |
317 | val |= | |
318 | (((__u16) port->number - | |
319 | (__u16) (port->serial->minor)) + 2) << 8; | |
84fe6e79 | 320 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
321 | val); |
322 | } | |
323 | } | |
324 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
325 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
326 | MOS_WDR_TIMEOUT); | |
327 | ||
328 | } | |
329 | ||
330 | /* | |
331 | * mos7840_get_uart_reg | |
332 | * To set the Control register by calling usb_fill_control_urb function | |
333 | * by passing usb_rcvctrlpipe function as parameter. | |
334 | */ | |
335 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
880af9db | 336 | __u16 *val) |
3f542974 PS |
337 | { |
338 | struct usb_device *dev = port->serial->dev; | |
339 | int ret = 0; | |
340 | __u16 Wval; | |
341 | ||
84fe6e79 | 342 | /* dbg("application number is %4x", |
880af9db AC |
343 | (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ |
344 | /* Wval is same as application number */ | |
0de9a702 | 345 | if (port->serial->num_ports == 4) { |
3f542974 PS |
346 | Wval = |
347 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
348 | 1) << 8; | |
84fe6e79 | 349 | dbg("mos7840_get_uart_reg application number is %x", Wval); |
3f542974 PS |
350 | } else { |
351 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 352 | Wval = (((__u16) port->number - |
3f542974 | 353 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 354 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
355 | Wval); |
356 | } else { | |
880af9db | 357 | Wval = (((__u16) port->number - |
3f542974 | 358 | (__u16) (port->serial->minor)) + 2) << 8; |
84fe6e79 | 359 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
360 | Wval); |
361 | } | |
362 | } | |
363 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
364 | MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, | |
365 | MOS_WDR_TIMEOUT); | |
366 | *val = (*val) & 0x00ff; | |
367 | return ret; | |
368 | } | |
369 | ||
370 | static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) | |
371 | { | |
372 | ||
84fe6e79 TC |
373 | dbg("***************************************"); |
374 | dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); | |
375 | dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); | |
376 | dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); | |
377 | dbg("***************************************"); | |
3f542974 PS |
378 | |
379 | } | |
380 | ||
381 | /************************************************************************/ | |
382 | /************************************************************************/ | |
383 | /* I N T E R F A C E F U N C T I O N S */ | |
384 | /* I N T E R F A C E F U N C T I O N S */ | |
385 | /************************************************************************/ | |
386 | /************************************************************************/ | |
387 | ||
388 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
389 | struct moschip_port *data) | |
390 | { | |
391 | usb_set_serial_port_data(port, (void *)data); | |
392 | } | |
393 | ||
394 | static inline struct moschip_port *mos7840_get_port_private(struct | |
395 | usb_serial_port | |
396 | *port) | |
397 | { | |
398 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
399 | } | |
400 | ||
0de9a702 | 401 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
3f542974 PS |
402 | { |
403 | struct moschip_port *mos7840_port; | |
404 | struct async_icount *icount; | |
405 | mos7840_port = port; | |
406 | icount = &mos7840_port->icount; | |
407 | if (new_msr & | |
408 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
409 | MOS_MSR_DELTA_CD)) { | |
410 | icount = &mos7840_port->icount; | |
411 | ||
412 | /* update input line counters */ | |
413 | if (new_msr & MOS_MSR_DELTA_CTS) { | |
414 | icount->cts++; | |
0de9a702 | 415 | smp_wmb(); |
3f542974 PS |
416 | } |
417 | if (new_msr & MOS_MSR_DELTA_DSR) { | |
418 | icount->dsr++; | |
0de9a702 | 419 | smp_wmb(); |
3f542974 PS |
420 | } |
421 | if (new_msr & MOS_MSR_DELTA_CD) { | |
422 | icount->dcd++; | |
0de9a702 | 423 | smp_wmb(); |
3f542974 PS |
424 | } |
425 | if (new_msr & MOS_MSR_DELTA_RI) { | |
426 | icount->rng++; | |
0de9a702 | 427 | smp_wmb(); |
3f542974 PS |
428 | } |
429 | } | |
3f542974 PS |
430 | } |
431 | ||
0de9a702 | 432 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
3f542974 PS |
433 | { |
434 | struct async_icount *icount; | |
435 | ||
441b62c1 | 436 | dbg("%s - %02x", __func__, new_lsr); |
3f542974 PS |
437 | |
438 | if (new_lsr & SERIAL_LSR_BI) { | |
880af9db AC |
439 | /* |
440 | * Parity and Framing errors only count if they | |
441 | * occur exclusive of a break being | |
442 | * received. | |
443 | */ | |
3f542974 PS |
444 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
445 | } | |
446 | ||
447 | /* update input line counters */ | |
448 | icount = &port->icount; | |
449 | if (new_lsr & SERIAL_LSR_BI) { | |
450 | icount->brk++; | |
0de9a702 | 451 | smp_wmb(); |
3f542974 PS |
452 | } |
453 | if (new_lsr & SERIAL_LSR_OE) { | |
454 | icount->overrun++; | |
0de9a702 | 455 | smp_wmb(); |
3f542974 PS |
456 | } |
457 | if (new_lsr & SERIAL_LSR_PE) { | |
458 | icount->parity++; | |
0de9a702 | 459 | smp_wmb(); |
3f542974 PS |
460 | } |
461 | if (new_lsr & SERIAL_LSR_FE) { | |
462 | icount->frame++; | |
0de9a702 | 463 | smp_wmb(); |
3f542974 | 464 | } |
3f542974 PS |
465 | } |
466 | ||
467 | /************************************************************************/ | |
468 | /************************************************************************/ | |
469 | /* U S B C A L L B A C K F U N C T I O N S */ | |
470 | /* U S B C A L L B A C K F U N C T I O N S */ | |
471 | /************************************************************************/ | |
472 | /************************************************************************/ | |
473 | ||
7d12e780 | 474 | static void mos7840_control_callback(struct urb *urb) |
3f542974 PS |
475 | { |
476 | unsigned char *data; | |
477 | struct moschip_port *mos7840_port; | |
478 | __u8 regval = 0x0; | |
0de9a702 | 479 | int result = 0; |
0643c724 | 480 | int status = urb->status; |
3f542974 | 481 | |
cdc97792 | 482 | mos7840_port = urb->context; |
0de9a702 | 483 | |
0643c724 | 484 | switch (status) { |
3f542974 PS |
485 | case 0: |
486 | /* success */ | |
487 | break; | |
488 | case -ECONNRESET: | |
489 | case -ENOENT: | |
490 | case -ESHUTDOWN: | |
491 | /* this urb is terminated, clean up */ | |
441b62c1 | 492 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 493 | status); |
3f542974 PS |
494 | return; |
495 | default: | |
441b62c1 | 496 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 497 | status); |
3f542974 PS |
498 | goto exit; |
499 | } | |
500 | ||
84fe6e79 TC |
501 | dbg("%s urb buffer size is %d", __func__, urb->actual_length); |
502 | dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, | |
3f542974 PS |
503 | mos7840_port->MsrLsr, mos7840_port->port_num); |
504 | data = urb->transfer_buffer; | |
505 | regval = (__u8) data[0]; | |
84fe6e79 | 506 | dbg("%s data is %x", __func__, regval); |
3f542974 PS |
507 | if (mos7840_port->MsrLsr == 0) |
508 | mos7840_handle_new_msr(mos7840_port, regval); | |
509 | else if (mos7840_port->MsrLsr == 1) | |
510 | mos7840_handle_new_lsr(mos7840_port, regval); | |
511 | ||
0de9a702 ON |
512 | exit: |
513 | spin_lock(&mos7840_port->pool_lock); | |
514 | if (!mos7840_port->zombie) | |
515 | result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); | |
516 | spin_unlock(&mos7840_port->pool_lock); | |
517 | if (result) { | |
518 | dev_err(&urb->dev->dev, | |
519 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 520 | __func__, result); |
0de9a702 | 521 | } |
3f542974 PS |
522 | } |
523 | ||
524 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
880af9db | 525 | __u16 *val) |
3f542974 PS |
526 | { |
527 | struct usb_device *dev = mcs->port->serial->dev; | |
0de9a702 ON |
528 | struct usb_ctrlrequest *dr = mcs->dr; |
529 | unsigned char *buffer = mcs->ctrl_buf; | |
530 | int ret; | |
3f542974 | 531 | |
3f542974 PS |
532 | dr->bRequestType = MCS_RD_RTYPE; |
533 | dr->bRequest = MCS_RDREQ; | |
880af9db | 534 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
3f542974 PS |
535 | dr->wIndex = cpu_to_le16(reg); |
536 | dr->wLength = cpu_to_le16(2); | |
537 | ||
538 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
539 | (unsigned char *)dr, buffer, 2, | |
540 | mos7840_control_callback, mcs); | |
541 | mcs->control_urb->transfer_buffer_length = 2; | |
542 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
543 | return ret; | |
544 | } | |
545 | ||
546 | /***************************************************************************** | |
547 | * mos7840_interrupt_callback | |
548 | * this is the callback function for when we have received data on the | |
549 | * interrupt endpoint. | |
550 | *****************************************************************************/ | |
551 | ||
7d12e780 | 552 | static void mos7840_interrupt_callback(struct urb *urb) |
3f542974 PS |
553 | { |
554 | int result; | |
555 | int length; | |
556 | struct moschip_port *mos7840_port; | |
557 | struct usb_serial *serial; | |
558 | __u16 Data; | |
559 | unsigned char *data; | |
560 | __u8 sp[5], st; | |
0de9a702 ON |
561 | int i, rv = 0; |
562 | __u16 wval, wreg = 0; | |
0643c724 | 563 | int status = urb->status; |
3f542974 | 564 | |
84fe6e79 | 565 | dbg("%s", " : Entering"); |
3f542974 | 566 | |
0643c724 | 567 | switch (status) { |
3f542974 PS |
568 | case 0: |
569 | /* success */ | |
570 | break; | |
571 | case -ECONNRESET: | |
572 | case -ENOENT: | |
573 | case -ESHUTDOWN: | |
574 | /* this urb is terminated, clean up */ | |
441b62c1 | 575 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 576 | status); |
3f542974 PS |
577 | return; |
578 | default: | |
441b62c1 | 579 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 580 | status); |
3f542974 PS |
581 | goto exit; |
582 | } | |
583 | ||
584 | length = urb->actual_length; | |
585 | data = urb->transfer_buffer; | |
586 | ||
cdc97792 | 587 | serial = urb->context; |
3f542974 PS |
588 | |
589 | /* Moschip get 5 bytes | |
590 | * Byte 1 IIR Port 1 (port.number is 0) | |
591 | * Byte 2 IIR Port 2 (port.number is 1) | |
592 | * Byte 3 IIR Port 3 (port.number is 2) | |
593 | * Byte 4 IIR Port 4 (port.number is 3) | |
594 | * Byte 5 FIFO status for both */ | |
595 | ||
596 | if (length && length > 5) { | |
84fe6e79 | 597 | dbg("%s", "Wrong data !!!"); |
3f542974 PS |
598 | return; |
599 | } | |
600 | ||
601 | sp[0] = (__u8) data[0]; | |
602 | sp[1] = (__u8) data[1]; | |
603 | sp[2] = (__u8) data[2]; | |
604 | sp[3] = (__u8) data[3]; | |
605 | st = (__u8) data[4]; | |
606 | ||
607 | for (i = 0; i < serial->num_ports; i++) { | |
608 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
609 | wval = | |
610 | (((__u16) serial->port[i]->number - | |
611 | (__u16) (serial->minor)) + 1) << 8; | |
612 | if (mos7840_port->open) { | |
613 | if (sp[i] & 0x01) { | |
84fe6e79 | 614 | dbg("SP%d No Interrupt !!!", i); |
3f542974 PS |
615 | } else { |
616 | switch (sp[i] & 0x0f) { | |
617 | case SERIAL_IIR_RLS: | |
618 | dbg("Serial Port %d: Receiver status error or ", i); | |
84fe6e79 | 619 | dbg("address bit detected in 9-bit mode"); |
3f542974 | 620 | mos7840_port->MsrLsr = 1; |
0de9a702 | 621 | wreg = LINE_STATUS_REGISTER; |
3f542974 PS |
622 | break; |
623 | case SERIAL_IIR_MS: | |
84fe6e79 | 624 | dbg("Serial Port %d: Modem status change", i); |
3f542974 | 625 | mos7840_port->MsrLsr = 0; |
0de9a702 | 626 | wreg = MODEM_STATUS_REGISTER; |
3f542974 PS |
627 | break; |
628 | } | |
0de9a702 ON |
629 | spin_lock(&mos7840_port->pool_lock); |
630 | if (!mos7840_port->zombie) { | |
631 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); | |
632 | } else { | |
633 | spin_unlock(&mos7840_port->pool_lock); | |
634 | return; | |
635 | } | |
636 | spin_unlock(&mos7840_port->pool_lock); | |
3f542974 PS |
637 | } |
638 | } | |
639 | } | |
880af9db AC |
640 | if (!(rv < 0)) |
641 | /* the completion handler for the control urb will resubmit */ | |
0de9a702 ON |
642 | return; |
643 | exit: | |
3f542974 PS |
644 | result = usb_submit_urb(urb, GFP_ATOMIC); |
645 | if (result) { | |
646 | dev_err(&urb->dev->dev, | |
647 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 648 | __func__, result); |
3f542974 | 649 | } |
3f542974 PS |
650 | } |
651 | ||
652 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
653 | const char *function) | |
654 | { | |
655 | if (!port) { | |
656 | dbg("%s - port == NULL", function); | |
657 | return -1; | |
658 | } | |
659 | if (!port->serial) { | |
660 | dbg("%s - port->serial == NULL", function); | |
661 | return -1; | |
662 | } | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
668 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
669 | const char *function) | |
670 | { | |
671 | if (!serial) { | |
672 | dbg("%s - serial == NULL", function); | |
673 | return -1; | |
674 | } | |
675 | if (!serial->type) { | |
676 | dbg("%s - serial->type == NULL!", function); | |
677 | return -1; | |
678 | } | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
684 | const char *function) | |
685 | { | |
686 | /* if no port was specified, or it fails a paranoia check */ | |
687 | if (!port || | |
688 | mos7840_port_paranoia_check(port, function) || | |
689 | mos7840_serial_paranoia_check(port->serial, function)) { | |
880af9db AC |
690 | /* then say that we don't have a valid usb_serial thing, |
691 | * which will end up genrating -ENODEV return values */ | |
3f542974 PS |
692 | return NULL; |
693 | } | |
694 | ||
695 | return port->serial; | |
696 | } | |
697 | ||
698 | /***************************************************************************** | |
699 | * mos7840_bulk_in_callback | |
700 | * this is the callback function for when we have received data on the | |
701 | * bulk in endpoint. | |
702 | *****************************************************************************/ | |
703 | ||
7d12e780 | 704 | static void mos7840_bulk_in_callback(struct urb *urb) |
3f542974 | 705 | { |
0643c724 | 706 | int retval; |
3f542974 PS |
707 | unsigned char *data; |
708 | struct usb_serial *serial; | |
709 | struct usb_serial_port *port; | |
710 | struct moschip_port *mos7840_port; | |
711 | struct tty_struct *tty; | |
0643c724 | 712 | int status = urb->status; |
3f542974 | 713 | |
cdc97792 | 714 | mos7840_port = urb->context; |
3f542974 | 715 | if (!mos7840_port) { |
84fe6e79 | 716 | dbg("%s", "NULL mos7840_port pointer"); |
50de36f7 GKH |
717 | mos7840_port->read_urb_busy = false; |
718 | return; | |
719 | } | |
720 | ||
721 | if (status) { | |
722 | dbg("nonzero read bulk status received: %d", status); | |
723 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
724 | return; |
725 | } | |
726 | ||
727 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 728 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 729 | dbg("%s", "Port Paranoia failed"); |
50de36f7 | 730 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
731 | return; |
732 | } | |
733 | ||
441b62c1 | 734 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 735 | if (!serial) { |
84fe6e79 | 736 | dbg("%s", "Bad serial pointer"); |
50de36f7 | 737 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
738 | return; |
739 | } | |
740 | ||
84fe6e79 | 741 | dbg("%s", "Entering... "); |
3f542974 PS |
742 | |
743 | data = urb->transfer_buffer; | |
744 | ||
84fe6e79 | 745 | dbg("%s", "Entering ..........."); |
3f542974 PS |
746 | |
747 | if (urb->actual_length) { | |
4a90f09b | 748 | tty = tty_port_tty_get(&mos7840_port->port->port); |
3f542974 PS |
749 | if (tty) { |
750 | tty_buffer_request_room(tty, urb->actual_length); | |
751 | tty_insert_flip_string(tty, data, urb->actual_length); | |
84fe6e79 | 752 | dbg(" %s ", data); |
3f542974 | 753 | tty_flip_buffer_push(tty); |
4a90f09b | 754 | tty_kref_put(tty); |
3f542974 PS |
755 | } |
756 | mos7840_port->icount.rx += urb->actual_length; | |
0de9a702 | 757 | smp_wmb(); |
84fe6e79 | 758 | dbg("mos7840_port->icount.rx is %d:", |
3f542974 PS |
759 | mos7840_port->icount.rx); |
760 | } | |
761 | ||
762 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 763 | dbg("%s", "URB KILLED !!!"); |
50de36f7 | 764 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
765 | return; |
766 | } | |
767 | ||
3f542974 | 768 | |
0de9a702 | 769 | mos7840_port->read_urb->dev = serial->dev; |
3f542974 | 770 | |
50de36f7 | 771 | mos7840_port->read_urb_busy = true; |
0643c724 | 772 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
0de9a702 | 773 | |
0643c724 | 774 | if (retval) { |
50de36f7 GKH |
775 | dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); |
776 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
777 | } |
778 | } | |
779 | ||
780 | /***************************************************************************** | |
781 | * mos7840_bulk_out_data_callback | |
880af9db AC |
782 | * this is the callback function for when we have finished sending |
783 | * serial data on the bulk out endpoint. | |
3f542974 PS |
784 | *****************************************************************************/ |
785 | ||
7d12e780 | 786 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
3f542974 PS |
787 | { |
788 | struct moschip_port *mos7840_port; | |
789 | struct tty_struct *tty; | |
0643c724 | 790 | int status = urb->status; |
0de9a702 ON |
791 | int i; |
792 | ||
cdc97792 | 793 | mos7840_port = urb->context; |
0de9a702 ON |
794 | spin_lock(&mos7840_port->pool_lock); |
795 | for (i = 0; i < NUM_URBS; i++) { | |
796 | if (urb == mos7840_port->write_urb_pool[i]) { | |
797 | mos7840_port->busy[i] = 0; | |
798 | break; | |
799 | } | |
800 | } | |
801 | spin_unlock(&mos7840_port->pool_lock); | |
802 | ||
0643c724 | 803 | if (status) { |
84fe6e79 | 804 | dbg("nonzero write bulk status received:%d", status); |
3f542974 PS |
805 | return; |
806 | } | |
807 | ||
441b62c1 | 808 | if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { |
84fe6e79 | 809 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
810 | return; |
811 | } | |
812 | ||
84fe6e79 | 813 | dbg("%s", "Entering ........."); |
3f542974 | 814 | |
4a90f09b | 815 | tty = tty_port_tty_get(&mos7840_port->port->port); |
b963a844 JS |
816 | if (tty && mos7840_port->open) |
817 | tty_wakeup(tty); | |
4a90f09b | 818 | tty_kref_put(tty); |
3f542974 PS |
819 | |
820 | } | |
821 | ||
822 | /************************************************************************/ | |
823 | /* 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 */ | |
824 | /************************************************************************/ | |
825 | #ifdef MCSSerialProbe | |
826 | static int mos7840_serial_probe(struct usb_serial *serial, | |
827 | const struct usb_device_id *id) | |
828 | { | |
829 | ||
830 | /*need to implement the mode_reg reading and updating\ | |
831 | structures usb_serial_ device_type\ | |
832 | (i.e num_ports, num_bulkin,bulkout etc) */ | |
833 | /* Also we can update the changes attach */ | |
834 | return 1; | |
835 | } | |
836 | #endif | |
837 | ||
838 | /***************************************************************************** | |
839 | * mos7840_open | |
840 | * this function is called by the tty driver when a port is opened | |
841 | * If successful, we return 0 | |
842 | * Otherwise we return a negative error number. | |
843 | *****************************************************************************/ | |
844 | ||
a509a7e4 | 845 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
3f542974 PS |
846 | { |
847 | int response; | |
848 | int j; | |
849 | struct usb_serial *serial; | |
850 | struct urb *urb; | |
851 | __u16 Data; | |
852 | int status; | |
853 | struct moschip_port *mos7840_port; | |
0de9a702 | 854 | struct moschip_port *port0; |
3f542974 | 855 | |
84fe6e79 TC |
856 | dbg ("%s enter", __func__); |
857 | ||
441b62c1 | 858 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 859 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
860 | return -ENODEV; |
861 | } | |
862 | ||
3f542974 PS |
863 | serial = port->serial; |
864 | ||
441b62c1 | 865 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 866 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
867 | return -ENODEV; |
868 | } | |
869 | ||
870 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 871 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 872 | |
0de9a702 | 873 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 PS |
874 | return -ENODEV; |
875 | ||
876 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
877 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
0de9a702 | 878 | port0->open_ports++; |
3f542974 PS |
879 | |
880 | /* Initialising the write urb pool */ | |
881 | for (j = 0; j < NUM_URBS; ++j) { | |
0de9a702 | 882 | urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 PS |
883 | mos7840_port->write_urb_pool[j] = urb; |
884 | ||
885 | if (urb == NULL) { | |
194343d9 | 886 | dev_err(&port->dev, "No more urbs???\n"); |
3f542974 PS |
887 | continue; |
888 | } | |
889 | ||
880af9db AC |
890 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
891 | GFP_KERNEL); | |
3f542974 | 892 | if (!urb->transfer_buffer) { |
0de9a702 ON |
893 | usb_free_urb(urb); |
894 | mos7840_port->write_urb_pool[j] = NULL; | |
194343d9 GKH |
895 | dev_err(&port->dev, |
896 | "%s-out of memory for urb buffers.\n", | |
897 | __func__); | |
3f542974 PS |
898 | continue; |
899 | } | |
900 | } | |
901 | ||
902 | /***************************************************************************** | |
903 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
904 | * | |
905 | * Register Index | |
906 | * 1 : IER | |
907 | * 2 : FCR | |
908 | * 3 : LCR | |
909 | * 4 : MCR | |
910 | * | |
911 | * 0x08 : SP1/2 Control Reg | |
912 | *****************************************************************************/ | |
913 | ||
880af9db | 914 | /* NEED to check the following Block */ |
3f542974 | 915 | |
3f542974 PS |
916 | Data = 0x0; |
917 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
918 | if (status < 0) { | |
84fe6e79 | 919 | dbg("Reading Spreg failed"); |
3f542974 PS |
920 | return -1; |
921 | } | |
922 | Data |= 0x80; | |
923 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
924 | if (status < 0) { | |
84fe6e79 | 925 | dbg("writing Spreg failed"); |
3f542974 PS |
926 | return -1; |
927 | } | |
928 | ||
929 | Data &= ~0x80; | |
930 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
931 | if (status < 0) { | |
84fe6e79 | 932 | dbg("writing Spreg failed"); |
3f542974 PS |
933 | return -1; |
934 | } | |
880af9db | 935 | /* End of block to be checked */ |
3f542974 | 936 | |
3f542974 | 937 | Data = 0x0; |
880af9db AC |
938 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
939 | &Data); | |
3f542974 | 940 | if (status < 0) { |
84fe6e79 | 941 | dbg("Reading Controlreg failed"); |
3f542974 PS |
942 | return -1; |
943 | } | |
880af9db AC |
944 | Data |= 0x08; /* Driver done bit */ |
945 | Data |= 0x20; /* rx_disable */ | |
946 | status = mos7840_set_reg_sync(port, | |
947 | mos7840_port->ControlRegOffset, Data); | |
3f542974 | 948 | if (status < 0) { |
84fe6e79 | 949 | dbg("writing Controlreg failed"); |
3f542974 PS |
950 | return -1; |
951 | } | |
880af9db AC |
952 | /* do register settings here */ |
953 | /* Set all regs to the device default values. */ | |
954 | /*********************************** | |
955 | * First Disable all interrupts. | |
956 | ***********************************/ | |
3f542974 | 957 | Data = 0x00; |
3f542974 PS |
958 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
959 | if (status < 0) { | |
84fe6e79 | 960 | dbg("disabling interrupts failed"); |
3f542974 PS |
961 | return -1; |
962 | } | |
880af9db | 963 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
3f542974 | 964 | Data = 0x00; |
3f542974 PS |
965 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
966 | if (status < 0) { | |
84fe6e79 | 967 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
968 | return -1; |
969 | } | |
970 | ||
971 | Data = 0xcf; | |
3f542974 PS |
972 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
973 | if (status < 0) { | |
84fe6e79 | 974 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
975 | return -1; |
976 | } | |
977 | ||
978 | Data = 0x03; | |
3f542974 PS |
979 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
980 | mos7840_port->shadowLCR = Data; | |
981 | ||
982 | Data = 0x0b; | |
3f542974 PS |
983 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
984 | mos7840_port->shadowMCR = Data; | |
985 | ||
986 | Data = 0x00; | |
3f542974 PS |
987 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
988 | mos7840_port->shadowLCR = Data; | |
989 | ||
880af9db | 990 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
991 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
992 | ||
993 | Data = 0x0c; | |
3f542974 PS |
994 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
995 | ||
996 | Data = 0x0; | |
3f542974 PS |
997 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
998 | ||
999 | Data = 0x00; | |
3f542974 PS |
1000 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1001 | ||
1002 | Data = Data & ~SERIAL_LCR_DLAB; | |
3f542974 PS |
1003 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1004 | mos7840_port->shadowLCR = Data; | |
1005 | ||
880af9db | 1006 | /* clearing Bulkin and Bulkout Fifo */ |
3f542974 | 1007 | Data = 0x0; |
3f542974 PS |
1008 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
1009 | ||
1010 | Data = Data | 0x0c; | |
3f542974 PS |
1011 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
1012 | ||
1013 | Data = Data & ~0x0c; | |
3f542974 | 1014 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
880af9db | 1015 | /* Finally enable all interrupts */ |
3f542974 | 1016 | Data = 0x0c; |
3f542974 PS |
1017 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
1018 | ||
880af9db | 1019 | /* clearing rx_disable */ |
3f542974 | 1020 | Data = 0x0; |
880af9db AC |
1021 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1022 | &Data); | |
3f542974 | 1023 | Data = Data & ~0x20; |
880af9db AC |
1024 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1025 | Data); | |
3f542974 | 1026 | |
880af9db | 1027 | /* rx_negate */ |
3f542974 | 1028 | Data = 0x0; |
880af9db AC |
1029 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1030 | &Data); | |
3f542974 | 1031 | Data = Data | 0x10; |
880af9db AC |
1032 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1033 | Data); | |
3f542974 | 1034 | |
880af9db AC |
1035 | /* Check to see if we've set up our endpoint info yet * |
1036 | * (can't set it up in mos7840_startup as the structures * | |
1037 | * were not set up at that time.) */ | |
0de9a702 | 1038 | if (port0->open_ports == 1) { |
3f542974 | 1039 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
3f542974 | 1040 | /* set up interrupt urb */ |
3f542974 | 1041 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
880af9db AC |
1042 | serial->dev, |
1043 | usb_rcvintpipe(serial->dev, | |
1044 | serial->port[0]->interrupt_in_endpointAddress), | |
1045 | serial->port[0]->interrupt_in_buffer, | |
1046 | serial->port[0]->interrupt_in_urb-> | |
1047 | transfer_buffer_length, | |
1048 | mos7840_interrupt_callback, | |
1049 | serial, | |
1050 | serial->port[0]->interrupt_in_urb->interval); | |
3f542974 PS |
1051 | |
1052 | /* start interrupt read for mos7840 * | |
1053 | * will continue as long as mos7840 is connected */ | |
1054 | ||
1055 | response = | |
1056 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1057 | GFP_KERNEL); | |
1058 | if (response) { | |
194343d9 GKH |
1059 | dev_err(&port->dev, "%s - Error %d submitting " |
1060 | "interrupt urb\n", __func__, response); | |
3f542974 PS |
1061 | } |
1062 | ||
1063 | } | |
1064 | ||
1065 | } | |
1066 | ||
1067 | /* see if we've set up our endpoint info yet * | |
1068 | * (can't set it up in mos7840_startup as the * | |
1069 | * structures were not set up at that time.) */ | |
1070 | ||
84fe6e79 TC |
1071 | dbg("port number is %d", port->number); |
1072 | dbg("serial number is %d", port->serial->minor); | |
1073 | dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); | |
1074 | dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); | |
1075 | dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); | |
1076 | dbg("port's number in the device is %d", mos7840_port->port_num); | |
3f542974 PS |
1077 | mos7840_port->read_urb = port->read_urb; |
1078 | ||
1079 | /* set up our bulk in urb */ | |
1080 | ||
1081 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1082 | serial->dev, | |
1083 | usb_rcvbulkpipe(serial->dev, | |
1084 | port->bulk_in_endpointAddress), | |
1085 | port->bulk_in_buffer, | |
1086 | mos7840_port->read_urb->transfer_buffer_length, | |
1087 | mos7840_bulk_in_callback, mos7840_port); | |
1088 | ||
84fe6e79 | 1089 | dbg("mos7840_open: bulkin endpoint is %d", |
3f542974 | 1090 | port->bulk_in_endpointAddress); |
50de36f7 | 1091 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
1092 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
1093 | if (response) { | |
194343d9 GKH |
1094 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
1095 | __func__, response); | |
50de36f7 | 1096 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1097 | } |
1098 | ||
1099 | /* initialize our wait queues */ | |
1100 | init_waitqueue_head(&mos7840_port->wait_chase); | |
1101 | init_waitqueue_head(&mos7840_port->delta_msr_wait); | |
1102 | ||
1103 | /* initialize our icount structure */ | |
1104 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); | |
1105 | ||
1106 | /* initialize our port settings */ | |
880af9db AC |
1107 | /* Must set to enable ints! */ |
1108 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
3f542974 PS |
1109 | /* send a open port command */ |
1110 | mos7840_port->open = 1; | |
880af9db | 1111 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
3f542974 PS |
1112 | mos7840_port->icount.tx = 0; |
1113 | mos7840_port->icount.rx = 0; | |
1114 | ||
84fe6e79 | 1115 | dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", |
880af9db | 1116 | serial, mos7840_port, port); |
3f542974 | 1117 | |
84fe6e79 TC |
1118 | dbg ("%s leave", __func__); |
1119 | ||
3f542974 PS |
1120 | return 0; |
1121 | ||
1122 | } | |
1123 | ||
1124 | /***************************************************************************** | |
1125 | * mos7840_chars_in_buffer | |
1126 | * this function is called by the tty driver when it wants to know how many | |
1127 | * bytes of data we currently have outstanding in the port (data that has | |
1128 | * been written, but hasn't made it out the port yet) | |
1129 | * If successful, we return the number of bytes left to be written in the | |
1130 | * system, | |
95da310e | 1131 | * Otherwise we return zero. |
3f542974 PS |
1132 | *****************************************************************************/ |
1133 | ||
95da310e | 1134 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
3f542974 | 1135 | { |
95da310e | 1136 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1137 | int i; |
1138 | int chars = 0; | |
0de9a702 | 1139 | unsigned long flags; |
3f542974 PS |
1140 | struct moschip_port *mos7840_port; |
1141 | ||
84fe6e79 | 1142 | dbg("%s", " mos7840_chars_in_buffer:entering ..........."); |
3f542974 | 1143 | |
441b62c1 | 1144 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1145 | dbg("%s", "Invalid port"); |
95da310e | 1146 | return 0; |
3f542974 PS |
1147 | } |
1148 | ||
1149 | mos7840_port = mos7840_get_port_private(port); | |
1150 | if (mos7840_port == NULL) { | |
84fe6e79 | 1151 | dbg("%s", "mos7840_break:leaving ..........."); |
95da310e | 1152 | return 0; |
3f542974 PS |
1153 | } |
1154 | ||
880af9db | 1155 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
95da310e AC |
1156 | for (i = 0; i < NUM_URBS; ++i) |
1157 | if (mos7840_port->busy[i]) | |
3f542974 | 1158 | chars += URB_TRANSFER_BUFFER_SIZE; |
880af9db | 1159 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
441b62c1 | 1160 | dbg("%s - returns %d", __func__, chars); |
0de9a702 | 1161 | return chars; |
3f542974 PS |
1162 | |
1163 | } | |
1164 | ||
3f542974 PS |
1165 | /***************************************************************************** |
1166 | * mos7840_close | |
1167 | * this function is called by the tty driver when a port is closed | |
1168 | *****************************************************************************/ | |
1169 | ||
335f8514 | 1170 | static void mos7840_close(struct usb_serial_port *port) |
3f542974 PS |
1171 | { |
1172 | struct usb_serial *serial; | |
1173 | struct moschip_port *mos7840_port; | |
0de9a702 | 1174 | struct moschip_port *port0; |
3f542974 PS |
1175 | int j; |
1176 | __u16 Data; | |
1177 | ||
84fe6e79 | 1178 | dbg("%s", "mos7840_close:entering..."); |
3f542974 | 1179 | |
441b62c1 | 1180 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1181 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1182 | return; |
1183 | } | |
1184 | ||
441b62c1 | 1185 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1186 | if (!serial) { |
84fe6e79 | 1187 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1188 | return; |
1189 | } | |
1190 | ||
1191 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 1192 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 1193 | |
0de9a702 | 1194 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 | 1195 | return; |
3f542974 PS |
1196 | |
1197 | for (j = 0; j < NUM_URBS; ++j) | |
1198 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1199 | ||
1200 | /* Freeing Write URBs */ | |
1201 | for (j = 0; j < NUM_URBS; ++j) { | |
1202 | if (mos7840_port->write_urb_pool[j]) { | |
1203 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1204 | kfree(mos7840_port->write_urb_pool[j]-> | |
1205 | transfer_buffer); | |
1206 | ||
1207 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1208 | } | |
1209 | } | |
1210 | ||
3f542974 PS |
1211 | /* While closing port, shutdown all bulk read, write * |
1212 | * and interrupt read if they exists */ | |
1213 | if (serial->dev) { | |
3f542974 | 1214 | if (mos7840_port->write_urb) { |
84fe6e79 | 1215 | dbg("%s", "Shutdown bulk write"); |
3f542974 PS |
1216 | usb_kill_urb(mos7840_port->write_urb); |
1217 | } | |
3f542974 | 1218 | if (mos7840_port->read_urb) { |
84fe6e79 | 1219 | dbg("%s", "Shutdown bulk read"); |
3f542974 | 1220 | usb_kill_urb(mos7840_port->read_urb); |
50de36f7 | 1221 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1222 | } |
1223 | if ((&mos7840_port->control_urb)) { | |
84fe6e79 | 1224 | dbg("%s", "Shutdown control read"); |
880af9db | 1225 | /*/ usb_kill_urb (mos7840_port->control_urb); */ |
3f542974 PS |
1226 | } |
1227 | } | |
880af9db AC |
1228 | /* if(mos7840_port->ctrl_buf != NULL) */ |
1229 | /* kfree(mos7840_port->ctrl_buf); */ | |
0de9a702 | 1230 | port0->open_ports--; |
84fe6e79 | 1231 | dbg("mos7840_num_open_ports in close%d:in port%d", |
0de9a702 ON |
1232 | port0->open_ports, port->number); |
1233 | if (port0->open_ports == 0) { | |
3f542974 | 1234 | if (serial->port[0]->interrupt_in_urb) { |
84fe6e79 | 1235 | dbg("%s", "Shutdown interrupt_in_urb"); |
0de9a702 | 1236 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
3f542974 PS |
1237 | } |
1238 | } | |
1239 | ||
1240 | if (mos7840_port->write_urb) { | |
1241 | /* if this urb had a transfer buffer already (old tx) free it */ | |
880af9db | 1242 | if (mos7840_port->write_urb->transfer_buffer != NULL) |
3f542974 | 1243 | kfree(mos7840_port->write_urb->transfer_buffer); |
3f542974 PS |
1244 | usb_free_urb(mos7840_port->write_urb); |
1245 | } | |
1246 | ||
1247 | Data = 0x0; | |
1248 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1249 | ||
1250 | Data = 0x00; | |
1251 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1252 | ||
1253 | mos7840_port->open = 0; | |
1254 | ||
84fe6e79 | 1255 | dbg("%s", "Leaving ............"); |
3f542974 PS |
1256 | } |
1257 | ||
1258 | /************************************************************************ | |
1259 | * | |
1260 | * mos7840_block_until_chase_response | |
1261 | * | |
1262 | * This function will block the close until one of the following: | |
1263 | * 1. Response to our Chase comes from mos7840 | |
dc0d5c1e | 1264 | * 2. A timeout of 10 seconds without activity has expired |
3f542974 PS |
1265 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
1266 | * | |
1267 | ************************************************************************/ | |
1268 | ||
95da310e AC |
1269 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
1270 | struct moschip_port *mos7840_port) | |
3f542974 PS |
1271 | { |
1272 | int timeout = 1 * HZ; | |
1273 | int wait = 10; | |
1274 | int count; | |
1275 | ||
1276 | while (1) { | |
95da310e | 1277 | count = mos7840_chars_in_buffer(tty); |
3f542974 PS |
1278 | |
1279 | /* Check for Buffer status */ | |
880af9db | 1280 | if (count <= 0) |
3f542974 | 1281 | return; |
3f542974 PS |
1282 | |
1283 | /* Block the thread for a while */ | |
1284 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1285 | timeout); | |
1286 | /* No activity.. count down section */ | |
1287 | wait--; | |
1288 | if (wait == 0) { | |
441b62c1 | 1289 | dbg("%s - TIMEOUT", __func__); |
3f542974 PS |
1290 | return; |
1291 | } else { | |
dc0d5c1e | 1292 | /* Reset timeout value back to seconds */ |
3f542974 PS |
1293 | wait = 10; |
1294 | } | |
1295 | } | |
1296 | ||
1297 | } | |
1298 | ||
1299 | /***************************************************************************** | |
1300 | * mos7840_break | |
1301 | * this function sends a break to the port | |
1302 | *****************************************************************************/ | |
95da310e | 1303 | static void mos7840_break(struct tty_struct *tty, int break_state) |
3f542974 | 1304 | { |
95da310e | 1305 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1306 | unsigned char data; |
1307 | struct usb_serial *serial; | |
1308 | struct moschip_port *mos7840_port; | |
1309 | ||
84fe6e79 TC |
1310 | dbg("%s", "Entering ..........."); |
1311 | dbg("mos7840_break: Start"); | |
3f542974 | 1312 | |
441b62c1 | 1313 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1314 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1315 | return; |
1316 | } | |
1317 | ||
441b62c1 | 1318 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1319 | if (!serial) { |
84fe6e79 | 1320 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1321 | return; |
1322 | } | |
1323 | ||
1324 | mos7840_port = mos7840_get_port_private(port); | |
1325 | ||
880af9db | 1326 | if (mos7840_port == NULL) |
3f542974 | 1327 | return; |
3f542974 | 1328 | |
95da310e | 1329 | if (serial->dev) |
3f542974 | 1330 | /* flush and block until tx is empty */ |
95da310e | 1331 | mos7840_block_until_chase_response(tty, mos7840_port); |
3f542974 | 1332 | |
95da310e | 1333 | if (break_state == -1) |
3f542974 | 1334 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
95da310e | 1335 | else |
3f542974 | 1336 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
3f542974 | 1337 | |
6b447f04 | 1338 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
3f542974 | 1339 | mos7840_port->shadowLCR = data; |
84fe6e79 | 1340 | dbg("mcs7840_break mos7840_port->shadowLCR is %x", |
3f542974 PS |
1341 | mos7840_port->shadowLCR); |
1342 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, | |
1343 | mos7840_port->shadowLCR); | |
1344 | ||
1345 | return; | |
1346 | } | |
1347 | ||
1348 | /***************************************************************************** | |
1349 | * mos7840_write_room | |
1350 | * this function is called by the tty driver when it wants to know how many | |
1351 | * bytes of data we can accept for a specific port. | |
1352 | * If successful, we return the amount of room that we have for this port | |
1353 | * Otherwise we return a negative error number. | |
1354 | *****************************************************************************/ | |
1355 | ||
95da310e | 1356 | static int mos7840_write_room(struct tty_struct *tty) |
3f542974 | 1357 | { |
95da310e | 1358 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1359 | int i; |
1360 | int room = 0; | |
0de9a702 | 1361 | unsigned long flags; |
3f542974 PS |
1362 | struct moschip_port *mos7840_port; |
1363 | ||
84fe6e79 | 1364 | dbg("%s", " mos7840_write_room:entering ..........."); |
3f542974 | 1365 | |
441b62c1 | 1366 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 TC |
1367 | dbg("%s", "Invalid port"); |
1368 | dbg("%s", " mos7840_write_room:leaving ..........."); | |
3f542974 PS |
1369 | return -1; |
1370 | } | |
1371 | ||
1372 | mos7840_port = mos7840_get_port_private(port); | |
1373 | if (mos7840_port == NULL) { | |
84fe6e79 | 1374 | dbg("%s", "mos7840_break:leaving ..........."); |
3f542974 PS |
1375 | return -1; |
1376 | } | |
1377 | ||
0de9a702 | 1378 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1379 | for (i = 0; i < NUM_URBS; ++i) { |
880af9db | 1380 | if (!mos7840_port->busy[i]) |
3f542974 | 1381 | room += URB_TRANSFER_BUFFER_SIZE; |
3f542974 | 1382 | } |
0de9a702 | 1383 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 | 1384 | |
0de9a702 | 1385 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
441b62c1 | 1386 | dbg("%s - returns %d", __func__, room); |
0de9a702 | 1387 | return room; |
3f542974 PS |
1388 | |
1389 | } | |
1390 | ||
1391 | /***************************************************************************** | |
1392 | * mos7840_write | |
1393 | * this function is called by the tty driver when data should be written to | |
1394 | * the port. | |
1395 | * If successful, we return the number of bytes written, otherwise we | |
1396 | * return a negative error number. | |
1397 | *****************************************************************************/ | |
1398 | ||
95da310e | 1399 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
3f542974 PS |
1400 | const unsigned char *data, int count) |
1401 | { | |
1402 | int status; | |
1403 | int i; | |
1404 | int bytes_sent = 0; | |
1405 | int transfer_size; | |
0de9a702 | 1406 | unsigned long flags; |
3f542974 PS |
1407 | |
1408 | struct moschip_port *mos7840_port; | |
1409 | struct usb_serial *serial; | |
1410 | struct urb *urb; | |
880af9db | 1411 | /* __u16 Data; */ |
3f542974 PS |
1412 | const unsigned char *current_position = data; |
1413 | unsigned char *data1; | |
84fe6e79 TC |
1414 | dbg("%s", "entering ..........."); |
1415 | /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
880af9db | 1416 | mos7840_port->shadowLCR); */ |
3f542974 PS |
1417 | |
1418 | #ifdef NOTMOS7840 | |
1419 | Data = 0x00; | |
3f542974 PS |
1420 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1421 | mos7840_port->shadowLCR = Data; | |
84fe6e79 TC |
1422 | dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); |
1423 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
3f542974 PS |
1424 | mos7840_port->shadowLCR); |
1425 | ||
880af9db AC |
1426 | /* Data = 0x03; */ |
1427 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ | |
1428 | /* mos7840_port->shadowLCR=Data;//Need to add later */ | |
3f542974 | 1429 | |
880af9db | 1430 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1431 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1432 | ||
880af9db AC |
1433 | /* Data = 0x0c; */ |
1434 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ | |
3f542974 | 1435 | Data = 0x00; |
3f542974 | 1436 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
84fe6e79 | 1437 | dbg("mos7840_write:DLL value is %x", Data); |
3f542974 PS |
1438 | |
1439 | Data = 0x0; | |
3f542974 | 1440 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
84fe6e79 | 1441 | dbg("mos7840_write:DLM value is %x", Data); |
3f542974 PS |
1442 | |
1443 | Data = Data & ~SERIAL_LCR_DLAB; | |
84fe6e79 | 1444 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", |
3f542974 | 1445 | mos7840_port->shadowLCR); |
3f542974 PS |
1446 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1447 | #endif | |
1448 | ||
441b62c1 | 1449 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1450 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1451 | return -1; |
1452 | } | |
1453 | ||
1454 | serial = port->serial; | |
441b62c1 | 1455 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 1456 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1457 | return -1; |
1458 | } | |
1459 | ||
1460 | mos7840_port = mos7840_get_port_private(port); | |
1461 | if (mos7840_port == NULL) { | |
84fe6e79 | 1462 | dbg("%s", "mos7840_port is NULL"); |
3f542974 PS |
1463 | return -1; |
1464 | } | |
1465 | ||
1466 | /* try to find a free urb in the list */ | |
1467 | urb = NULL; | |
1468 | ||
0de9a702 | 1469 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1470 | for (i = 0; i < NUM_URBS; ++i) { |
0de9a702 ON |
1471 | if (!mos7840_port->busy[i]) { |
1472 | mos7840_port->busy[i] = 1; | |
3f542974 | 1473 | urb = mos7840_port->write_urb_pool[i]; |
84fe6e79 | 1474 | dbg("URB:%d", i); |
3f542974 PS |
1475 | break; |
1476 | } | |
1477 | } | |
0de9a702 | 1478 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 PS |
1479 | |
1480 | if (urb == NULL) { | |
441b62c1 | 1481 | dbg("%s - no more free urbs", __func__); |
3f542974 PS |
1482 | goto exit; |
1483 | } | |
1484 | ||
1485 | if (urb->transfer_buffer == NULL) { | |
1486 | urb->transfer_buffer = | |
1487 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
1488 | ||
1489 | if (urb->transfer_buffer == NULL) { | |
194343d9 GKH |
1490 | dev_err(&port->dev, "%s no more kernel memory...\n", |
1491 | __func__); | |
3f542974 PS |
1492 | goto exit; |
1493 | } | |
1494 | } | |
1495 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1496 | ||
97c4965d | 1497 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
3f542974 PS |
1498 | |
1499 | /* fill urb with data and submit */ | |
1500 | usb_fill_bulk_urb(urb, | |
1501 | serial->dev, | |
1502 | usb_sndbulkpipe(serial->dev, | |
1503 | port->bulk_out_endpointAddress), | |
1504 | urb->transfer_buffer, | |
1505 | transfer_size, | |
1506 | mos7840_bulk_out_data_callback, mos7840_port); | |
1507 | ||
1508 | data1 = urb->transfer_buffer; | |
84fe6e79 | 1509 | dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); |
3f542974 PS |
1510 | |
1511 | /* send it down the pipe */ | |
1512 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1513 | ||
1514 | if (status) { | |
0de9a702 | 1515 | mos7840_port->busy[i] = 0; |
194343d9 GKH |
1516 | dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " |
1517 | "with status = %d\n", __func__, status); | |
3f542974 PS |
1518 | bytes_sent = status; |
1519 | goto exit; | |
1520 | } | |
1521 | bytes_sent = transfer_size; | |
1522 | mos7840_port->icount.tx += transfer_size; | |
0de9a702 | 1523 | smp_wmb(); |
84fe6e79 | 1524 | dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); |
95da310e | 1525 | exit: |
3f542974 PS |
1526 | return bytes_sent; |
1527 | ||
1528 | } | |
1529 | ||
1530 | /***************************************************************************** | |
1531 | * mos7840_throttle | |
1532 | * this function is called by the tty driver when it wants to stop the data | |
1533 | * being read from the port. | |
1534 | *****************************************************************************/ | |
1535 | ||
95da310e | 1536 | static void mos7840_throttle(struct tty_struct *tty) |
3f542974 | 1537 | { |
95da310e | 1538 | struct usb_serial_port *port = tty->driver_data; |
3f542974 | 1539 | struct moschip_port *mos7840_port; |
3f542974 PS |
1540 | int status; |
1541 | ||
441b62c1 | 1542 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1543 | dbg("%s", "Invalid port"); |
3f542974 PS |
1544 | return; |
1545 | } | |
1546 | ||
84fe6e79 | 1547 | dbg("- port %d", port->number); |
3f542974 PS |
1548 | |
1549 | mos7840_port = mos7840_get_port_private(port); | |
1550 | ||
1551 | if (mos7840_port == NULL) | |
1552 | return; | |
1553 | ||
1554 | if (!mos7840_port->open) { | |
84fe6e79 | 1555 | dbg("%s", "port not opened"); |
3f542974 PS |
1556 | return; |
1557 | } | |
1558 | ||
84fe6e79 | 1559 | dbg("%s", "Entering .........."); |
3f542974 | 1560 | |
3f542974 PS |
1561 | /* if we are implementing XON/XOFF, send the stop character */ |
1562 | if (I_IXOFF(tty)) { | |
1563 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e AC |
1564 | status = mos7840_write(tty, port, &stop_char, 1); |
1565 | if (status <= 0) | |
3f542974 | 1566 | return; |
3f542974 | 1567 | } |
3f542974 PS |
1568 | /* if we are implementing RTS/CTS, toggle that line */ |
1569 | if (tty->termios->c_cflag & CRTSCTS) { | |
1570 | mos7840_port->shadowMCR &= ~MCR_RTS; | |
95da310e | 1571 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1572 | mos7840_port->shadowMCR); |
95da310e | 1573 | if (status < 0) |
3f542974 | 1574 | return; |
3f542974 PS |
1575 | } |
1576 | ||
1577 | return; | |
1578 | } | |
1579 | ||
1580 | /***************************************************************************** | |
1581 | * mos7840_unthrottle | |
880af9db AC |
1582 | * this function is called by the tty driver when it wants to resume |
1583 | * the data being read from the port (called after mos7840_throttle is | |
1584 | * called) | |
3f542974 | 1585 | *****************************************************************************/ |
95da310e | 1586 | static void mos7840_unthrottle(struct tty_struct *tty) |
3f542974 | 1587 | { |
95da310e | 1588 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1589 | int status; |
1590 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1591 | ||
441b62c1 | 1592 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1593 | dbg("%s", "Invalid port"); |
3f542974 PS |
1594 | return; |
1595 | } | |
1596 | ||
1597 | if (mos7840_port == NULL) | |
1598 | return; | |
1599 | ||
1600 | if (!mos7840_port->open) { | |
441b62c1 | 1601 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1602 | return; |
1603 | } | |
1604 | ||
84fe6e79 | 1605 | dbg("%s", "Entering .........."); |
3f542974 | 1606 | |
3f542974 PS |
1607 | /* if we are implementing XON/XOFF, send the start character */ |
1608 | if (I_IXOFF(tty)) { | |
1609 | unsigned char start_char = START_CHAR(tty); | |
95da310e AC |
1610 | status = mos7840_write(tty, port, &start_char, 1); |
1611 | if (status <= 0) | |
3f542974 | 1612 | return; |
3f542974 PS |
1613 | } |
1614 | ||
1615 | /* if we are implementing RTS/CTS, toggle that line */ | |
1616 | if (tty->termios->c_cflag & CRTSCTS) { | |
1617 | mos7840_port->shadowMCR |= MCR_RTS; | |
95da310e | 1618 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1619 | mos7840_port->shadowMCR); |
95da310e | 1620 | if (status < 0) |
3f542974 | 1621 | return; |
3f542974 | 1622 | } |
3f542974 PS |
1623 | } |
1624 | ||
95da310e | 1625 | static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) |
3f542974 | 1626 | { |
95da310e | 1627 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1628 | struct moschip_port *mos7840_port; |
1629 | unsigned int result; | |
1630 | __u16 msr; | |
1631 | __u16 mcr; | |
880af9db | 1632 | int status; |
3f542974 PS |
1633 | mos7840_port = mos7840_get_port_private(port); |
1634 | ||
441b62c1 | 1635 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1636 | |
1637 | if (mos7840_port == NULL) | |
1638 | return -ENODEV; | |
1639 | ||
1640 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
1641 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); | |
1642 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | |
1643 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1644 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1645 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1646 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1647 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1648 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1649 | ||
441b62c1 | 1650 | dbg("%s - 0x%04X", __func__, result); |
3f542974 PS |
1651 | |
1652 | return result; | |
1653 | } | |
1654 | ||
95da310e | 1655 | static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, |
3f542974 PS |
1656 | unsigned int set, unsigned int clear) |
1657 | { | |
95da310e | 1658 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1659 | struct moschip_port *mos7840_port; |
1660 | unsigned int mcr; | |
87521c46 | 1661 | int status; |
3f542974 | 1662 | |
441b62c1 | 1663 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1664 | |
1665 | mos7840_port = mos7840_get_port_private(port); | |
1666 | ||
1667 | if (mos7840_port == NULL) | |
1668 | return -ENODEV; | |
1669 | ||
e2984494 | 1670 | /* FIXME: What locks the port registers ? */ |
3f542974 PS |
1671 | mcr = mos7840_port->shadowMCR; |
1672 | if (clear & TIOCM_RTS) | |
1673 | mcr &= ~MCR_RTS; | |
1674 | if (clear & TIOCM_DTR) | |
1675 | mcr &= ~MCR_DTR; | |
1676 | if (clear & TIOCM_LOOP) | |
1677 | mcr &= ~MCR_LOOPBACK; | |
1678 | ||
1679 | if (set & TIOCM_RTS) | |
1680 | mcr |= MCR_RTS; | |
1681 | if (set & TIOCM_DTR) | |
1682 | mcr |= MCR_DTR; | |
1683 | if (set & TIOCM_LOOP) | |
1684 | mcr |= MCR_LOOPBACK; | |
1685 | ||
1686 | mos7840_port->shadowMCR = mcr; | |
1687 | ||
3f542974 PS |
1688 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
1689 | if (status < 0) { | |
84fe6e79 | 1690 | dbg("setting MODEM_CONTROL_REGISTER Failed"); |
87521c46 | 1691 | return status; |
3f542974 PS |
1692 | } |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | /***************************************************************************** | |
1698 | * mos7840_calc_baud_rate_divisor | |
1699 | * this function calculates the proper baud rate divisor for the specified | |
1700 | * baud rate. | |
1701 | *****************************************************************************/ | |
1702 | static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, | |
880af9db | 1703 | __u16 *clk_sel_val) |
3f542974 PS |
1704 | { |
1705 | ||
441b62c1 | 1706 | dbg("%s - %d", __func__, baudRate); |
3f542974 PS |
1707 | |
1708 | if (baudRate <= 115200) { | |
1709 | *divisor = 115200 / baudRate; | |
1710 | *clk_sel_val = 0x0; | |
1711 | } | |
1712 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1713 | *divisor = 230400 / baudRate; | |
1714 | *clk_sel_val = 0x10; | |
1715 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1716 | *divisor = 403200 / baudRate; | |
1717 | *clk_sel_val = 0x20; | |
1718 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1719 | *divisor = 460800 / baudRate; | |
1720 | *clk_sel_val = 0x30; | |
1721 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1722 | *divisor = 806400 / baudRate; | |
1723 | *clk_sel_val = 0x40; | |
1724 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1725 | *divisor = 921600 / baudRate; | |
1726 | *clk_sel_val = 0x50; | |
1727 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1728 | *divisor = 1572864 / baudRate; | |
1729 | *clk_sel_val = 0x60; | |
1730 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1731 | *divisor = 3145728 / baudRate; | |
1732 | *clk_sel_val = 0x70; | |
1733 | } | |
1734 | return 0; | |
1735 | ||
1736 | #ifdef NOTMCS7840 | |
1737 | ||
1738 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1739 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1740 | *divisor = mos7840_divisor_table[i].Divisor; | |
1741 | return 0; | |
1742 | } | |
1743 | } | |
1744 | ||
1745 | /* After trying for all the standard baud rates * | |
1746 | * Try calculating the divisor for this baud rate */ | |
1747 | ||
1748 | if (baudrate > 75 && baudrate < 230400) { | |
1749 | /* get the divisor */ | |
1750 | custom = (__u16) (230400L / baudrate); | |
1751 | ||
1752 | /* Check for round off */ | |
1753 | round1 = (__u16) (2304000L / baudrate); | |
1754 | round = (__u16) (round1 - (custom * 10)); | |
880af9db | 1755 | if (round > 4) |
3f542974 | 1756 | custom++; |
3f542974 PS |
1757 | *divisor = custom; |
1758 | ||
84fe6e79 | 1759 | dbg(" Baud %d = %d", baudrate, custom); |
3f542974 PS |
1760 | return 0; |
1761 | } | |
1762 | ||
84fe6e79 | 1763 | dbg("%s", " Baud calculation Failed..."); |
3f542974 PS |
1764 | return -1; |
1765 | #endif | |
1766 | } | |
1767 | ||
1768 | /***************************************************************************** | |
1769 | * mos7840_send_cmd_write_baud_rate | |
1770 | * this function sends the proper command to change the baud rate of the | |
1771 | * specified port. | |
1772 | *****************************************************************************/ | |
1773 | ||
1774 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1775 | int baudRate) | |
1776 | { | |
1777 | int divisor = 0; | |
1778 | int status; | |
1779 | __u16 Data; | |
1780 | unsigned char number; | |
1781 | __u16 clk_sel_val; | |
1782 | struct usb_serial_port *port; | |
1783 | ||
1784 | if (mos7840_port == NULL) | |
1785 | return -1; | |
1786 | ||
1787 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 1788 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1789 | dbg("%s", "Invalid port"); |
3f542974 PS |
1790 | return -1; |
1791 | } | |
1792 | ||
441b62c1 | 1793 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1794 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1795 | return -1; |
1796 | } | |
1797 | ||
84fe6e79 | 1798 | dbg("%s", "Entering .........."); |
3f542974 PS |
1799 | |
1800 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; | |
1801 | ||
441b62c1 | 1802 | dbg("%s - port = %d, baud = %d", __func__, |
3f542974 | 1803 | mos7840_port->port->number, baudRate); |
880af9db | 1804 | /* reset clk_uart_sel in spregOffset */ |
3f542974 PS |
1805 | if (baudRate > 115200) { |
1806 | #ifdef HW_flow_control | |
880af9db AC |
1807 | /* NOTE: need to see the pther register to modify */ |
1808 | /* setting h/w flow control bit to 1 */ | |
3f542974 PS |
1809 | Data = 0x2b; |
1810 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1811 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1812 | Data); | |
3f542974 | 1813 | if (status < 0) { |
84fe6e79 | 1814 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1815 | return -1; |
1816 | } | |
1817 | #endif | |
1818 | ||
1819 | } else { | |
1820 | #ifdef HW_flow_control | |
880af9db | 1821 | / *setting h/w flow control bit to 0 */ |
3f542974 PS |
1822 | Data = 0xb; |
1823 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1824 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1825 | Data); | |
3f542974 | 1826 | if (status < 0) { |
84fe6e79 | 1827 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1828 | return -1; |
1829 | } | |
1830 | #endif | |
1831 | ||
1832 | } | |
1833 | ||
880af9db | 1834 | if (1) { /* baudRate <= 115200) */ |
3f542974 PS |
1835 | clk_sel_val = 0x0; |
1836 | Data = 0x0; | |
880af9db | 1837 | status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, |
3f542974 | 1838 | &clk_sel_val); |
880af9db AC |
1839 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
1840 | &Data); | |
3f542974 | 1841 | if (status < 0) { |
84fe6e79 | 1842 | dbg("reading spreg failed in set_serial_baud"); |
3f542974 PS |
1843 | return -1; |
1844 | } | |
1845 | Data = (Data & 0x8f) | clk_sel_val; | |
880af9db AC |
1846 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
1847 | Data); | |
3f542974 | 1848 | if (status < 0) { |
84fe6e79 | 1849 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1850 | return -1; |
1851 | } | |
1852 | /* Calculate the Divisor */ | |
1853 | ||
1854 | if (status) { | |
194343d9 | 1855 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
3f542974 PS |
1856 | return status; |
1857 | } | |
1858 | /* Enable access to divisor latch */ | |
1859 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1860 | mos7840_port->shadowLCR = Data; | |
1861 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1862 | ||
1863 | /* Write the divisor */ | |
1864 | Data = (unsigned char)(divisor & 0xff); | |
84fe6e79 | 1865 | dbg("set_serial_baud Value to write DLL is %x", Data); |
3f542974 PS |
1866 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1867 | ||
1868 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
84fe6e79 | 1869 | dbg("set_serial_baud Value to write DLM is %x", Data); |
3f542974 PS |
1870 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1871 | ||
1872 | /* Disable access to divisor latch */ | |
1873 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1874 | mos7840_port->shadowLCR = Data; | |
1875 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1876 | ||
1877 | } | |
3f542974 PS |
1878 | return status; |
1879 | } | |
1880 | ||
1881 | /***************************************************************************** | |
1882 | * mos7840_change_port_settings | |
1883 | * This routine is called to set the UART on the device to match | |
1884 | * the specified new settings. | |
1885 | *****************************************************************************/ | |
1886 | ||
95da310e AC |
1887 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1888 | struct moschip_port *mos7840_port, struct ktermios *old_termios) | |
3f542974 | 1889 | { |
3f542974 PS |
1890 | int baud; |
1891 | unsigned cflag; | |
1892 | unsigned iflag; | |
1893 | __u8 lData; | |
1894 | __u8 lParity; | |
1895 | __u8 lStop; | |
1896 | int status; | |
1897 | __u16 Data; | |
1898 | struct usb_serial_port *port; | |
1899 | struct usb_serial *serial; | |
1900 | ||
1901 | if (mos7840_port == NULL) | |
1902 | return; | |
1903 | ||
1904 | port = (struct usb_serial_port *)mos7840_port->port; | |
1905 | ||
441b62c1 | 1906 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1907 | dbg("%s", "Invalid port"); |
3f542974 PS |
1908 | return; |
1909 | } | |
1910 | ||
441b62c1 | 1911 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1912 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1913 | return; |
1914 | } | |
1915 | ||
1916 | serial = port->serial; | |
1917 | ||
441b62c1 | 1918 | dbg("%s - port %d", __func__, mos7840_port->port->number); |
3f542974 PS |
1919 | |
1920 | if (!mos7840_port->open) { | |
441b62c1 | 1921 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1922 | return; |
1923 | } | |
1924 | ||
84fe6e79 | 1925 | dbg("%s", "Entering .........."); |
3f542974 PS |
1926 | |
1927 | lData = LCR_BITS_8; | |
1928 | lStop = LCR_STOP_1; | |
1929 | lParity = LCR_PAR_NONE; | |
1930 | ||
1931 | cflag = tty->termios->c_cflag; | |
1932 | iflag = tty->termios->c_iflag; | |
1933 | ||
1934 | /* Change the number of bits */ | |
1935 | if (cflag & CSIZE) { | |
1936 | switch (cflag & CSIZE) { | |
1937 | case CS5: | |
1938 | lData = LCR_BITS_5; | |
1939 | break; | |
1940 | ||
1941 | case CS6: | |
1942 | lData = LCR_BITS_6; | |
1943 | break; | |
1944 | ||
1945 | case CS7: | |
1946 | lData = LCR_BITS_7; | |
1947 | break; | |
1948 | default: | |
1949 | case CS8: | |
1950 | lData = LCR_BITS_8; | |
1951 | break; | |
1952 | } | |
1953 | } | |
1954 | /* Change the Parity bit */ | |
1955 | if (cflag & PARENB) { | |
1956 | if (cflag & PARODD) { | |
1957 | lParity = LCR_PAR_ODD; | |
441b62c1 | 1958 | dbg("%s - parity = odd", __func__); |
3f542974 PS |
1959 | } else { |
1960 | lParity = LCR_PAR_EVEN; | |
441b62c1 | 1961 | dbg("%s - parity = even", __func__); |
3f542974 PS |
1962 | } |
1963 | ||
1964 | } else { | |
441b62c1 | 1965 | dbg("%s - parity = none", __func__); |
3f542974 PS |
1966 | } |
1967 | ||
880af9db | 1968 | if (cflag & CMSPAR) |
3f542974 | 1969 | lParity = lParity | 0x20; |
3f542974 PS |
1970 | |
1971 | /* Change the Stop bit */ | |
1972 | if (cflag & CSTOPB) { | |
1973 | lStop = LCR_STOP_2; | |
441b62c1 | 1974 | dbg("%s - stop bits = 2", __func__); |
3f542974 PS |
1975 | } else { |
1976 | lStop = LCR_STOP_1; | |
441b62c1 | 1977 | dbg("%s - stop bits = 1", __func__); |
3f542974 PS |
1978 | } |
1979 | ||
1980 | /* Update the LCR with the correct value */ | |
1981 | mos7840_port->shadowLCR &= | |
1982 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1983 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
1984 | ||
84fe6e79 | 1985 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", |
3f542974 PS |
1986 | mos7840_port->shadowLCR); |
1987 | /* Disable Interrupts */ | |
1988 | Data = 0x00; | |
1989 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1990 | ||
1991 | Data = 0x00; | |
1992 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1993 | ||
1994 | Data = 0xcf; | |
1995 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1996 | ||
1997 | /* Send the updated LCR value to the mos7840 */ | |
1998 | Data = mos7840_port->shadowLCR; | |
1999 | ||
2000 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
2001 | ||
2002 | Data = 0x00b; | |
2003 | mos7840_port->shadowMCR = Data; | |
2004 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2005 | Data = 0x00b; | |
2006 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2007 | ||
2008 | /* set up the MCR register and send it to the mos7840 */ | |
2009 | ||
2010 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
880af9db | 2011 | if (cflag & CBAUD) |
3f542974 | 2012 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
3f542974 | 2013 | |
880af9db | 2014 | if (cflag & CRTSCTS) |
3f542974 | 2015 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
880af9db | 2016 | else |
3f542974 | 2017 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
3f542974 PS |
2018 | |
2019 | Data = mos7840_port->shadowMCR; | |
2020 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2021 | ||
2022 | /* Determine divisor based on baud rate */ | |
2023 | baud = tty_get_baud_rate(tty); | |
2024 | ||
2025 | if (!baud) { | |
2026 | /* pick a default, any default... */ | |
84fe6e79 | 2027 | dbg("%s", "Picked default baud..."); |
3f542974 PS |
2028 | baud = 9600; |
2029 | } | |
2030 | ||
441b62c1 | 2031 | dbg("%s - baud rate = %d", __func__, baud); |
3f542974 PS |
2032 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
2033 | ||
2034 | /* Enable Interrupts */ | |
2035 | Data = 0x0c; | |
2036 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2037 | ||
50de36f7 | 2038 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2039 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2040 | mos7840_port->read_urb_busy = true; |
3f542974 | 2041 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
3f542974 | 2042 | if (status) { |
50de36f7 | 2043 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2044 | status); |
50de36f7 | 2045 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2046 | } |
2047 | } | |
2048 | wake_up(&mos7840_port->delta_msr_wait); | |
2049 | mos7840_port->delta_msr_cond = 1; | |
84fe6e79 | 2050 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", |
3f542974 PS |
2051 | mos7840_port->shadowLCR); |
2052 | ||
2053 | return; | |
2054 | } | |
2055 | ||
2056 | /***************************************************************************** | |
2057 | * mos7840_set_termios | |
2058 | * this function is called by the tty driver when it wants to change | |
2059 | * the termios structure | |
2060 | *****************************************************************************/ | |
2061 | ||
95da310e AC |
2062 | static void mos7840_set_termios(struct tty_struct *tty, |
2063 | struct usb_serial_port *port, | |
606d099c | 2064 | struct ktermios *old_termios) |
3f542974 PS |
2065 | { |
2066 | int status; | |
2067 | unsigned int cflag; | |
2068 | struct usb_serial *serial; | |
2069 | struct moschip_port *mos7840_port; | |
84fe6e79 | 2070 | dbg("mos7840_set_termios: START"); |
441b62c1 | 2071 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2072 | dbg("%s", "Invalid port"); |
3f542974 PS |
2073 | return; |
2074 | } | |
2075 | ||
2076 | serial = port->serial; | |
2077 | ||
441b62c1 | 2078 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 2079 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
2080 | return; |
2081 | } | |
2082 | ||
2083 | mos7840_port = mos7840_get_port_private(port); | |
2084 | ||
2085 | if (mos7840_port == NULL) | |
2086 | return; | |
2087 | ||
3f542974 | 2088 | if (!mos7840_port->open) { |
441b62c1 | 2089 | dbg("%s - port not opened", __func__); |
3f542974 PS |
2090 | return; |
2091 | } | |
2092 | ||
84fe6e79 | 2093 | dbg("%s", "setting termios - "); |
3f542974 PS |
2094 | |
2095 | cflag = tty->termios->c_cflag; | |
2096 | ||
441b62c1 | 2097 | dbg("%s - clfag %08x iflag %08x", __func__, |
3f542974 | 2098 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); |
441b62c1 | 2099 | dbg("%s - old clfag %08x old iflag %08x", __func__, |
3d3ddce5 | 2100 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); |
441b62c1 | 2101 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
2102 | |
2103 | /* change the port settings to the new ones specified */ | |
2104 | ||
95da310e | 2105 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
3f542974 PS |
2106 | |
2107 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 2108 | dbg("%s", "URB KILLED !!!!!"); |
3f542974 PS |
2109 | return; |
2110 | } | |
2111 | ||
50de36f7 | 2112 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2113 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2114 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
2115 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
2116 | if (status) { | |
50de36f7 | 2117 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2118 | status); |
50de36f7 | 2119 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2120 | } |
2121 | } | |
2122 | return; | |
2123 | } | |
2124 | ||
2125 | /***************************************************************************** | |
2126 | * mos7840_get_lsr_info - get line status register info | |
2127 | * | |
2128 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2129 | * is emptied. On bus types like RS485, the transmitter must | |
2130 | * release the bus after transmitting. This must be done when | |
2131 | * the transmit shift register is empty, not be done when the | |
2132 | * transmit holding register is empty. This functionality | |
2133 | * allows an RS485 driver to be written in user space. | |
2134 | *****************************************************************************/ | |
2135 | ||
95da310e | 2136 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
97c4965d | 2137 | unsigned int __user *value) |
3f542974 PS |
2138 | { |
2139 | int count; | |
2140 | unsigned int result = 0; | |
2141 | ||
95da310e | 2142 | count = mos7840_chars_in_buffer(tty); |
3f542974 | 2143 | if (count == 0) { |
441b62c1 | 2144 | dbg("%s -- Empty", __func__); |
3f542974 PS |
2145 | result = TIOCSER_TEMT; |
2146 | } | |
2147 | ||
2148 | if (copy_to_user(value, &result, sizeof(int))) | |
2149 | return -EFAULT; | |
2150 | return 0; | |
2151 | } | |
2152 | ||
3f542974 PS |
2153 | /***************************************************************************** |
2154 | * mos7840_get_serial_info | |
2155 | * function to get information about serial port | |
2156 | *****************************************************************************/ | |
2157 | ||
2158 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
97c4965d | 2159 | struct serial_struct __user *retinfo) |
3f542974 PS |
2160 | { |
2161 | struct serial_struct tmp; | |
2162 | ||
2163 | if (mos7840_port == NULL) | |
2164 | return -1; | |
2165 | ||
2166 | if (!retinfo) | |
2167 | return -EFAULT; | |
2168 | ||
2169 | memset(&tmp, 0, sizeof(tmp)); | |
2170 | ||
2171 | tmp.type = PORT_16550A; | |
2172 | tmp.line = mos7840_port->port->serial->minor; | |
2173 | tmp.port = mos7840_port->port->number; | |
2174 | tmp.irq = 0; | |
2175 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2176 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2177 | tmp.baud_base = 9600; | |
2178 | tmp.close_delay = 5 * HZ; | |
2179 | tmp.closing_wait = 30 * HZ; | |
2180 | ||
2181 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2182 | return -EFAULT; | |
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | /***************************************************************************** | |
2187 | * SerialIoctl | |
2188 | * this function handles any ioctl calls to the driver | |
2189 | *****************************************************************************/ | |
2190 | ||
95da310e | 2191 | static int mos7840_ioctl(struct tty_struct *tty, struct file *file, |
3f542974 PS |
2192 | unsigned int cmd, unsigned long arg) |
2193 | { | |
95da310e | 2194 | struct usb_serial_port *port = tty->driver_data; |
97c4965d | 2195 | void __user *argp = (void __user *)arg; |
3f542974 | 2196 | struct moschip_port *mos7840_port; |
3f542974 PS |
2197 | |
2198 | struct async_icount cnow; | |
2199 | struct async_icount cprev; | |
2200 | struct serial_icounter_struct icount; | |
3f542974 | 2201 | |
441b62c1 | 2202 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2203 | dbg("%s", "Invalid port"); |
3f542974 PS |
2204 | return -1; |
2205 | } | |
2206 | ||
2207 | mos7840_port = mos7840_get_port_private(port); | |
3f542974 PS |
2208 | |
2209 | if (mos7840_port == NULL) | |
2210 | return -1; | |
2211 | ||
441b62c1 | 2212 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
3f542974 PS |
2213 | |
2214 | switch (cmd) { | |
2215 | /* return number of bytes available */ | |
2216 | ||
3f542974 | 2217 | case TIOCSERGETLSR: |
441b62c1 | 2218 | dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
95da310e | 2219 | return mos7840_get_lsr_info(tty, argp); |
3f542974 PS |
2220 | return 0; |
2221 | ||
3f542974 | 2222 | case TIOCGSERIAL: |
441b62c1 | 2223 | dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
97c4965d | 2224 | return mos7840_get_serial_info(mos7840_port, argp); |
3f542974 PS |
2225 | |
2226 | case TIOCSSERIAL: | |
441b62c1 | 2227 | dbg("%s (%d) TIOCSSERIAL", __func__, port->number); |
3f542974 PS |
2228 | break; |
2229 | ||
2230 | case TIOCMIWAIT: | |
441b62c1 | 2231 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
3f542974 PS |
2232 | cprev = mos7840_port->icount; |
2233 | while (1) { | |
880af9db | 2234 | /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
3f542974 PS |
2235 | mos7840_port->delta_msr_cond = 0; |
2236 | wait_event_interruptible(mos7840_port->delta_msr_wait, | |
2237 | (mos7840_port-> | |
2238 | delta_msr_cond == 1)); | |
2239 | ||
2240 | /* see if a signal did it */ | |
2241 | if (signal_pending(current)) | |
2242 | return -ERESTARTSYS; | |
2243 | cnow = mos7840_port->icount; | |
0de9a702 | 2244 | smp_rmb(); |
3f542974 PS |
2245 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
2246 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2247 | return -EIO; /* no change => error */ | |
2248 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2249 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2250 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
2251 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
2252 | return 0; | |
2253 | } | |
2254 | cprev = cnow; | |
2255 | } | |
2256 | /* NOTREACHED */ | |
2257 | break; | |
2258 | ||
2259 | case TIOCGICOUNT: | |
2260 | cnow = mos7840_port->icount; | |
0de9a702 | 2261 | smp_rmb(); |
3f542974 PS |
2262 | icount.cts = cnow.cts; |
2263 | icount.dsr = cnow.dsr; | |
2264 | icount.rng = cnow.rng; | |
2265 | icount.dcd = cnow.dcd; | |
2266 | icount.rx = cnow.rx; | |
2267 | icount.tx = cnow.tx; | |
2268 | icount.frame = cnow.frame; | |
2269 | icount.overrun = cnow.overrun; | |
2270 | icount.parity = cnow.parity; | |
2271 | icount.brk = cnow.brk; | |
2272 | icount.buf_overrun = cnow.buf_overrun; | |
2273 | ||
441b62c1 | 2274 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, |
3f542974 | 2275 | port->number, icount.rx, icount.tx); |
97c4965d | 2276 | if (copy_to_user(argp, &icount, sizeof(icount))) |
3f542974 PS |
2277 | return -EFAULT; |
2278 | return 0; | |
3f542974 PS |
2279 | default: |
2280 | break; | |
2281 | } | |
3f542974 PS |
2282 | return -ENOIOCTLCMD; |
2283 | } | |
2284 | ||
2285 | static int mos7840_calc_num_ports(struct usb_serial *serial) | |
2286 | { | |
0de9a702 | 2287 | int mos7840_num_ports = 0; |
3f542974 | 2288 | |
84fe6e79 TC |
2289 | dbg("numberofendpoints: cur %d, alt %d", |
2290 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints, | |
3f542974 PS |
2291 | (int)serial->interface->altsetting->desc.bNumEndpoints); |
2292 | if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { | |
0de9a702 | 2293 | mos7840_num_ports = serial->num_ports = 2; |
3f542974 | 2294 | } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { |
0de9a702 ON |
2295 | serial->num_bulk_in = 4; |
2296 | serial->num_bulk_out = 4; | |
2297 | mos7840_num_ports = serial->num_ports = 4; | |
3f542974 | 2298 | } |
84fe6e79 | 2299 | dbg ("mos7840_num_ports = %d", mos7840_num_ports); |
3f542974 PS |
2300 | return mos7840_num_ports; |
2301 | } | |
2302 | ||
2303 | /**************************************************************************** | |
2304 | * mos7840_startup | |
2305 | ****************************************************************************/ | |
2306 | ||
2307 | static int mos7840_startup(struct usb_serial *serial) | |
2308 | { | |
2309 | struct moschip_port *mos7840_port; | |
2310 | struct usb_device *dev; | |
2311 | int i, status; | |
2312 | ||
2313 | __u16 Data; | |
84fe6e79 | 2314 | dbg("%s", "mos7840_startup :Entering.........."); |
3f542974 PS |
2315 | |
2316 | if (!serial) { | |
84fe6e79 | 2317 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2318 | return -1; |
2319 | } | |
2320 | ||
2321 | dev = serial->dev; | |
2322 | ||
84fe6e79 TC |
2323 | dbg("%s", "Entering..."); |
2324 | dbg ("mos7840_startup: serial = %p", serial); | |
3f542974 PS |
2325 | |
2326 | /* we set up the pointers to the endpoints in the mos7840_open * | |
2327 | * function, as the structures aren't created yet. */ | |
2328 | ||
2329 | /* set up port private structures */ | |
2330 | for (i = 0; i < serial->num_ports; ++i) { | |
84fe6e79 | 2331 | dbg ("mos7840_startup: configuring port %d............", i); |
7ac9da10 | 2332 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); |
3f542974 | 2333 | if (mos7840_port == NULL) { |
194343d9 | 2334 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
0de9a702 ON |
2335 | status = -ENOMEM; |
2336 | i--; /* don't follow NULL pointer cleaning up */ | |
2337 | goto error; | |
3f542974 | 2338 | } |
3f542974 | 2339 | |
880af9db AC |
2340 | /* Initialize all port interrupt end point to port 0 int |
2341 | * endpoint. Our device has only one interrupt end point | |
2342 | * common to all port */ | |
3f542974 PS |
2343 | |
2344 | mos7840_port->port = serial->port[i]; | |
2345 | mos7840_set_port_private(serial->port[i], mos7840_port); | |
0de9a702 | 2346 | spin_lock_init(&mos7840_port->pool_lock); |
3f542974 | 2347 | |
37768adf TC |
2348 | /* minor is not initialised until later by |
2349 | * usb-serial.c:get_free_serial() and cannot therefore be used | |
2350 | * to index device instances */ | |
2351 | mos7840_port->port_num = i + 1; | |
2352 | dbg ("serial->port[i]->number = %d", serial->port[i]->number); | |
2353 | dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); | |
2354 | dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); | |
2355 | dbg ("serial->minor = %d", serial->minor); | |
3f542974 PS |
2356 | |
2357 | if (mos7840_port->port_num == 1) { | |
2358 | mos7840_port->SpRegOffset = 0x0; | |
2359 | mos7840_port->ControlRegOffset = 0x1; | |
2360 | mos7840_port->DcrRegOffset = 0x4; | |
2361 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2362 | && (serial->num_ports == 4)) { |
3f542974 PS |
2363 | mos7840_port->SpRegOffset = 0x8; |
2364 | mos7840_port->ControlRegOffset = 0x9; | |
2365 | mos7840_port->DcrRegOffset = 0x16; | |
2366 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2367 | && (serial->num_ports == 2)) { |
3f542974 PS |
2368 | mos7840_port->SpRegOffset = 0xa; |
2369 | mos7840_port->ControlRegOffset = 0xb; | |
2370 | mos7840_port->DcrRegOffset = 0x19; | |
2371 | } else if ((mos7840_port->port_num == 3) | |
0de9a702 | 2372 | && (serial->num_ports == 4)) { |
3f542974 PS |
2373 | mos7840_port->SpRegOffset = 0xa; |
2374 | mos7840_port->ControlRegOffset = 0xb; | |
2375 | mos7840_port->DcrRegOffset = 0x19; | |
2376 | } else if ((mos7840_port->port_num == 4) | |
0de9a702 | 2377 | && (serial->num_ports == 4)) { |
3f542974 PS |
2378 | mos7840_port->SpRegOffset = 0xc; |
2379 | mos7840_port->ControlRegOffset = 0xd; | |
2380 | mos7840_port->DcrRegOffset = 0x1c; | |
2381 | } | |
2382 | mos7840_dump_serial_port(mos7840_port); | |
3f542974 PS |
2383 | mos7840_set_port_private(serial->port[i], mos7840_port); |
2384 | ||
880af9db AC |
2385 | /* enable rx_disable bit in control register */ |
2386 | status = mos7840_get_reg_sync(serial->port[i], | |
2387 | mos7840_port->ControlRegOffset, &Data); | |
3f542974 | 2388 | if (status < 0) { |
84fe6e79 | 2389 | dbg("Reading ControlReg failed status-0x%x", status); |
3f542974 PS |
2390 | break; |
2391 | } else | |
84fe6e79 | 2392 | dbg("ControlReg Reading success val is %x, status%d", |
3f542974 | 2393 | Data, status); |
880af9db AC |
2394 | Data |= 0x08; /* setting driver done bit */ |
2395 | Data |= 0x04; /* sp1_bit to have cts change reflect in | |
2396 | modem status reg */ | |
3f542974 | 2397 | |
880af9db AC |
2398 | /* Data |= 0x20; //rx_disable bit */ |
2399 | status = mos7840_set_reg_sync(serial->port[i], | |
3f542974 PS |
2400 | mos7840_port->ControlRegOffset, Data); |
2401 | if (status < 0) { | |
84fe6e79 | 2402 | dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); |
3f542974 PS |
2403 | break; |
2404 | } else | |
84fe6e79 | 2405 | dbg("ControlReg Writing success(rx_disable) status%d", |
3f542974 PS |
2406 | status); |
2407 | ||
880af9db AC |
2408 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
2409 | and 0x24 in DCR3 */ | |
3f542974 | 2410 | Data = 0x01; |
880af9db AC |
2411 | status = mos7840_set_reg_sync(serial->port[i], |
2412 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); | |
3f542974 | 2413 | if (status < 0) { |
84fe6e79 | 2414 | dbg("Writing DCR0 failed status-0x%x", status); |
3f542974 PS |
2415 | break; |
2416 | } else | |
84fe6e79 | 2417 | dbg("DCR0 Writing success status%d", status); |
3f542974 PS |
2418 | |
2419 | Data = 0x05; | |
880af9db AC |
2420 | status = mos7840_set_reg_sync(serial->port[i], |
2421 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); | |
3f542974 | 2422 | if (status < 0) { |
84fe6e79 | 2423 | dbg("Writing DCR1 failed status-0x%x", status); |
3f542974 PS |
2424 | break; |
2425 | } else | |
84fe6e79 | 2426 | dbg("DCR1 Writing success status%d", status); |
3f542974 PS |
2427 | |
2428 | Data = 0x24; | |
880af9db AC |
2429 | status = mos7840_set_reg_sync(serial->port[i], |
2430 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); | |
3f542974 | 2431 | if (status < 0) { |
84fe6e79 | 2432 | dbg("Writing DCR2 failed status-0x%x", status); |
3f542974 PS |
2433 | break; |
2434 | } else | |
84fe6e79 | 2435 | dbg("DCR2 Writing success status%d", status); |
3f542974 | 2436 | |
880af9db | 2437 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
3f542974 | 2438 | Data = 0x0; |
880af9db | 2439 | status = mos7840_set_reg_sync(serial->port[i], |
3f542974 PS |
2440 | CLK_START_VALUE_REGISTER, Data); |
2441 | if (status < 0) { | |
84fe6e79 | 2442 | dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); |
3f542974 PS |
2443 | break; |
2444 | } else | |
84fe6e79 | 2445 | dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); |
3f542974 PS |
2446 | |
2447 | Data = 0x20; | |
880af9db AC |
2448 | status = mos7840_set_reg_sync(serial->port[i], |
2449 | CLK_MULTI_REGISTER, Data); | |
3f542974 | 2450 | if (status < 0) { |
84fe6e79 | 2451 | dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", |
3f542974 | 2452 | status); |
0de9a702 | 2453 | goto error; |
3f542974 | 2454 | } else |
84fe6e79 | 2455 | dbg("CLK_MULTI_REGISTER Writing success status%d", |
3f542974 PS |
2456 | status); |
2457 | ||
880af9db | 2458 | /* write value 0x0 to scratchpad register */ |
3f542974 | 2459 | Data = 0x00; |
880af9db AC |
2460 | status = mos7840_set_uart_reg(serial->port[i], |
2461 | SCRATCH_PAD_REGISTER, Data); | |
3f542974 | 2462 | if (status < 0) { |
84fe6e79 | 2463 | dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", |
3f542974 PS |
2464 | status); |
2465 | break; | |
2466 | } else | |
84fe6e79 | 2467 | dbg("SCRATCH_PAD_REGISTER Writing success status%d", |
3f542974 PS |
2468 | status); |
2469 | ||
880af9db | 2470 | /* Zero Length flag register */ |
3f542974 | 2471 | if ((mos7840_port->port_num != 1) |
0de9a702 | 2472 | && (serial->num_ports == 2)) { |
3f542974 PS |
2473 | |
2474 | Data = 0xff; | |
3f542974 | 2475 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2476 | (__u16) (ZLP_REG1 + |
2477 | ((__u16)mos7840_port->port_num)), Data); | |
84fe6e79 | 2478 | dbg("ZLIP offset %x", |
3f542974 | 2479 | (__u16) (ZLP_REG1 + |
880af9db | 2480 | ((__u16) mos7840_port->port_num))); |
3f542974 | 2481 | if (status < 0) { |
84fe6e79 | 2482 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2483 | i + 2, status); |
2484 | break; | |
2485 | } else | |
84fe6e79 | 2486 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2487 | i + 2, status); |
2488 | } else { | |
2489 | Data = 0xff; | |
3f542974 | 2490 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2491 | (__u16) (ZLP_REG1 + |
2492 | ((__u16)mos7840_port->port_num) - 0x1), Data); | |
84fe6e79 | 2493 | dbg("ZLIP offset %x", |
3f542974 PS |
2494 | (__u16) (ZLP_REG1 + |
2495 | ((__u16) mos7840_port->port_num) - 0x1)); | |
2496 | if (status < 0) { | |
84fe6e79 | 2497 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2498 | i + 1, status); |
2499 | break; | |
2500 | } else | |
84fe6e79 | 2501 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2502 | i + 1, status); |
2503 | ||
2504 | } | |
0de9a702 | 2505 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 | 2506 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); |
880af9db AC |
2507 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), |
2508 | GFP_KERNEL); | |
2509 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || | |
2510 | !mos7840_port->dr) { | |
0de9a702 ON |
2511 | status = -ENOMEM; |
2512 | goto error; | |
2513 | } | |
3f542974 | 2514 | } |
84fe6e79 | 2515 | dbg ("mos7840_startup: all ports configured..........."); |
3f542974 | 2516 | |
880af9db | 2517 | /* Zero Length flag enable */ |
3f542974 | 2518 | Data = 0x0f; |
3f542974 PS |
2519 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); |
2520 | if (status < 0) { | |
84fe6e79 | 2521 | dbg("Writing ZLP_REG5 failed status-0x%x", status); |
7ced46c3 | 2522 | goto error; |
3f542974 | 2523 | } else |
84fe6e79 | 2524 | dbg("ZLP_REG5 Writing success status%d", status); |
3f542974 PS |
2525 | |
2526 | /* setting configuration feature to one */ | |
2527 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
97c4965d | 2528 | (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); |
3f542974 | 2529 | return 0; |
0de9a702 ON |
2530 | error: |
2531 | for (/* nothing */; i >= 0; i--) { | |
2532 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2533 | ||
2534 | kfree(mos7840_port->dr); | |
2535 | kfree(mos7840_port->ctrl_buf); | |
2536 | usb_free_urb(mos7840_port->control_urb); | |
2537 | kfree(mos7840_port); | |
2538 | serial->port[i] = NULL; | |
2539 | } | |
2540 | return status; | |
3f542974 PS |
2541 | } |
2542 | ||
2543 | /**************************************************************************** | |
f9c99bb8 | 2544 | * mos7840_disconnect |
3f542974 PS |
2545 | * This function is called whenever the device is removed from the usb bus. |
2546 | ****************************************************************************/ | |
2547 | ||
f9c99bb8 | 2548 | static void mos7840_disconnect(struct usb_serial *serial) |
3f542974 PS |
2549 | { |
2550 | int i; | |
0de9a702 | 2551 | unsigned long flags; |
3f542974 | 2552 | struct moschip_port *mos7840_port; |
f9c99bb8 | 2553 | dbg("%s", " disconnect :entering.........."); |
3f542974 PS |
2554 | |
2555 | if (!serial) { | |
84fe6e79 | 2556 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2557 | return; |
2558 | } | |
2559 | ||
880af9db | 2560 | /* check for the ports to be closed,close the ports and disconnect */ |
3f542974 PS |
2561 | |
2562 | /* free private structure allocated for serial port * | |
2563 | * stop reads and writes on all ports */ | |
2564 | ||
2565 | for (i = 0; i < serial->num_ports; ++i) { | |
2566 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
37768adf TC |
2567 | dbg ("mos7840_port %d = %p", i, mos7840_port); |
2568 | if (mos7840_port) { | |
2569 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); | |
2570 | mos7840_port->zombie = 1; | |
2571 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); | |
2572 | usb_kill_urb(mos7840_port->control_urb); | |
f9c99bb8 AS |
2573 | } |
2574 | } | |
2575 | ||
2576 | dbg("%s", "Thank u :: "); | |
2577 | ||
2578 | } | |
2579 | ||
2580 | /**************************************************************************** | |
2581 | * mos7840_release | |
2582 | * This function is called when the usb_serial structure is freed. | |
2583 | ****************************************************************************/ | |
2584 | ||
2585 | static void mos7840_release(struct usb_serial *serial) | |
2586 | { | |
2587 | int i; | |
2588 | struct moschip_port *mos7840_port; | |
2589 | dbg("%s", " release :entering.........."); | |
2590 | ||
2591 | if (!serial) { | |
2592 | dbg("%s", "Invalid Handler"); | |
2593 | return; | |
2594 | } | |
2595 | ||
2596 | /* check for the ports to be closed,close the ports and disconnect */ | |
2597 | ||
2598 | /* free private structure allocated for serial port * | |
2599 | * stop reads and writes on all ports */ | |
2600 | ||
2601 | for (i = 0; i < serial->num_ports; ++i) { | |
2602 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2603 | dbg("mos7840_port %d = %p", i, mos7840_port); | |
2604 | if (mos7840_port) { | |
37768adf TC |
2605 | kfree(mos7840_port->ctrl_buf); |
2606 | kfree(mos7840_port->dr); | |
2607 | kfree(mos7840_port); | |
2608 | } | |
3f542974 PS |
2609 | } |
2610 | ||
84fe6e79 | 2611 | dbg("%s", "Thank u :: "); |
3f542974 PS |
2612 | |
2613 | } | |
2614 | ||
d9b1b787 JH |
2615 | static struct usb_driver io_driver = { |
2616 | .name = "mos7840", | |
2617 | .probe = usb_serial_probe, | |
2618 | .disconnect = usb_serial_disconnect, | |
2619 | .id_table = moschip_id_table_combined, | |
2620 | .no_dynamic_id = 1, | |
2621 | }; | |
2622 | ||
3f542974 PS |
2623 | static struct usb_serial_driver moschip7840_4port_device = { |
2624 | .driver = { | |
2625 | .owner = THIS_MODULE, | |
2626 | .name = "mos7840", | |
2627 | }, | |
2628 | .description = DRIVER_DESC, | |
d9b1b787 | 2629 | .usb_driver = &io_driver, |
3f542974 | 2630 | .id_table = moschip_port_id_table, |
3f542974 | 2631 | .num_ports = 4, |
3f542974 PS |
2632 | .open = mos7840_open, |
2633 | .close = mos7840_close, | |
2634 | .write = mos7840_write, | |
2635 | .write_room = mos7840_write_room, | |
2636 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2637 | .throttle = mos7840_throttle, | |
2638 | .unthrottle = mos7840_unthrottle, | |
2639 | .calc_num_ports = mos7840_calc_num_ports, | |
2640 | #ifdef MCSSerialProbe | |
2641 | .probe = mos7840_serial_probe, | |
2642 | #endif | |
2643 | .ioctl = mos7840_ioctl, | |
2644 | .set_termios = mos7840_set_termios, | |
2645 | .break_ctl = mos7840_break, | |
2646 | .tiocmget = mos7840_tiocmget, | |
2647 | .tiocmset = mos7840_tiocmset, | |
2648 | .attach = mos7840_startup, | |
f9c99bb8 AS |
2649 | .disconnect = mos7840_disconnect, |
2650 | .release = mos7840_release, | |
3f542974 PS |
2651 | .read_bulk_callback = mos7840_bulk_in_callback, |
2652 | .read_int_callback = mos7840_interrupt_callback, | |
2653 | }; | |
2654 | ||
3f542974 PS |
2655 | /**************************************************************************** |
2656 | * moschip7840_init | |
2657 | * This is called by the module subsystem, or on startup to initialize us | |
2658 | ****************************************************************************/ | |
2659 | static int __init moschip7840_init(void) | |
2660 | { | |
2661 | int retval; | |
2662 | ||
84fe6e79 | 2663 | dbg("%s", " mos7840_init :entering.........."); |
3f542974 PS |
2664 | |
2665 | /* Register with the usb serial */ | |
2666 | retval = usb_serial_register(&moschip7840_4port_device); | |
2667 | ||
2668 | if (retval) | |
2669 | goto failed_port_device_register; | |
2670 | ||
84fe6e79 | 2671 | dbg("%s", "Entering..."); |
c197a8db GKH |
2672 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
2673 | DRIVER_DESC "\n"); | |
3f542974 PS |
2674 | |
2675 | /* Register with the usb */ | |
2676 | retval = usb_register(&io_driver); | |
3f542974 | 2677 | if (retval == 0) { |
84fe6e79 | 2678 | dbg("%s", "Leaving..."); |
3f542974 PS |
2679 | return 0; |
2680 | } | |
3f542974 | 2681 | usb_serial_deregister(&moschip7840_4port_device); |
880af9db | 2682 | failed_port_device_register: |
3f542974 PS |
2683 | return retval; |
2684 | } | |
2685 | ||
2686 | /**************************************************************************** | |
2687 | * moschip7840_exit | |
2688 | * Called when the driver is about to be unloaded. | |
2689 | ****************************************************************************/ | |
2690 | static void __exit moschip7840_exit(void) | |
2691 | { | |
2692 | ||
84fe6e79 | 2693 | dbg("%s", " mos7840_exit :entering.........."); |
3f542974 PS |
2694 | |
2695 | usb_deregister(&io_driver); | |
2696 | ||
2697 | usb_serial_deregister(&moschip7840_4port_device); | |
2698 | ||
84fe6e79 | 2699 | dbg("%s", "Entering..."); |
3f542974 PS |
2700 | } |
2701 | ||
2702 | module_init(moschip7840_init); | |
2703 | module_exit(moschip7840_exit); | |
2704 | ||
2705 | /* Module information */ | |
2706 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2707 | MODULE_LICENSE("GPL"); | |
2708 | ||
2709 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2710 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |