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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 | |
27f1281d BG |
130 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 |
131 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 | |
132 | #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 | |
3f542974 | 133 | |
9d498bea RL |
134 | /* This driver also supports |
135 | * ATEN UC2324 device using Moschip MCS7840 | |
136 | * ATEN UC2322 device using Moschip MCS7820 | |
137 | */ | |
e9b8cffa TC |
138 | #define USB_VENDOR_ID_ATENINTL 0x0557 |
139 | #define ATENINTL_DEVICE_ID_UC2324 0x2011 | |
9d498bea | 140 | #define ATENINTL_DEVICE_ID_UC2322 0x7820 |
e9b8cffa | 141 | |
11e1abb4 | 142 | /* Interrupt Routine Defines */ |
3f542974 PS |
143 | |
144 | #define SERIAL_IIR_RLS 0x06 | |
145 | #define SERIAL_IIR_MS 0x00 | |
146 | ||
147 | /* | |
148 | * Emulation of the bit mask on the LINE STATUS REGISTER. | |
149 | */ | |
150 | #define SERIAL_LSR_DR 0x0001 | |
151 | #define SERIAL_LSR_OE 0x0002 | |
152 | #define SERIAL_LSR_PE 0x0004 | |
153 | #define SERIAL_LSR_FE 0x0008 | |
154 | #define SERIAL_LSR_BI 0x0010 | |
155 | ||
156 | #define MOS_MSR_DELTA_CTS 0x10 | |
157 | #define MOS_MSR_DELTA_DSR 0x20 | |
158 | #define MOS_MSR_DELTA_RI 0x40 | |
159 | #define MOS_MSR_DELTA_CD 0x80 | |
160 | ||
880af9db | 161 | /* Serial Port register Address */ |
3f542974 PS |
162 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
163 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) | |
164 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) | |
165 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) | |
166 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) | |
167 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) | |
168 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) | |
169 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) | |
170 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) | |
171 | ||
172 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) | |
173 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) | |
174 | ||
175 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) | |
176 | ||
177 | /* | |
178 | * URB POOL related defines | |
179 | */ | |
180 | #define NUM_URBS 16 /* URB Count */ | |
181 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
182 | ||
183 | ||
7d40d7e8 | 184 | static const struct usb_device_id moschip_port_id_table[] = { |
3f542974 PS |
185 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
186 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae CB |
187 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
188 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, | |
189 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, | |
190 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
191 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
192 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 193 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
acf509ae | 194 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
27f1281d | 195 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 196 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 197 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
198 | {} /* terminating entry */ |
199 | }; | |
200 | ||
7d40d7e8 | 201 | static const struct usb_device_id moschip_id_table_combined[] __devinitconst = { |
3f542974 PS |
202 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
203 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae CB |
204 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
205 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, | |
206 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, | |
207 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
208 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
209 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 210 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
acf509ae | 211 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
27f1281d | 212 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 213 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 214 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
215 | {} /* terminating entry */ |
216 | }; | |
217 | ||
218 | MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); | |
219 | ||
220 | /* This structure holds all of the local port information */ | |
221 | ||
222 | struct moschip_port { | |
223 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
224 | struct urb *write_urb; /* write URB for this port */ | |
225 | struct urb *read_urb; /* read URB for this port */ | |
0de9a702 | 226 | struct urb *int_urb; |
3f542974 PS |
227 | __u8 shadowLCR; /* last LCR value received */ |
228 | __u8 shadowMCR; /* last MCR value received */ | |
229 | char open; | |
0de9a702 ON |
230 | char open_ports; |
231 | char zombie; | |
3f542974 PS |
232 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
233 | wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ | |
234 | int delta_msr_cond; | |
235 | struct async_icount icount; | |
236 | struct usb_serial_port *port; /* loop back to the owner of this object */ | |
237 | ||
880af9db | 238 | /* Offsets */ |
3f542974 PS |
239 | __u8 SpRegOffset; |
240 | __u8 ControlRegOffset; | |
241 | __u8 DcrRegOffset; | |
880af9db | 242 | /* for processing control URBS in interrupt context */ |
3f542974 | 243 | struct urb *control_urb; |
0de9a702 | 244 | struct usb_ctrlrequest *dr; |
3f542974 PS |
245 | char *ctrl_buf; |
246 | int MsrLsr; | |
247 | ||
0de9a702 | 248 | spinlock_t pool_lock; |
3f542974 | 249 | struct urb *write_urb_pool[NUM_URBS]; |
0de9a702 | 250 | char busy[NUM_URBS]; |
50de36f7 | 251 | bool read_urb_busy; |
3f542974 PS |
252 | }; |
253 | ||
254 | ||
255 | static int debug; | |
3f542974 PS |
256 | |
257 | /* | |
258 | * mos7840_set_reg_sync | |
259 | * To set the Control register by calling usb_fill_control_urb function | |
260 | * by passing usb_sndctrlpipe function as parameter. | |
261 | */ | |
262 | ||
263 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
264 | __u16 val) | |
265 | { | |
266 | struct usb_device *dev = port->serial->dev; | |
267 | val = val & 0x00ff; | |
84fe6e79 | 268 | dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); |
3f542974 PS |
269 | |
270 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
271 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
272 | MOS_WDR_TIMEOUT); | |
273 | } | |
274 | ||
275 | /* | |
276 | * mos7840_get_reg_sync | |
277 | * To set the Uart register by calling usb_fill_control_urb function by | |
278 | * passing usb_rcvctrlpipe function as parameter. | |
279 | */ | |
280 | ||
281 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
880af9db | 282 | __u16 *val) |
3f542974 PS |
283 | { |
284 | struct usb_device *dev = port->serial->dev; | |
285 | int ret = 0; | |
9e221a35 JH |
286 | u8 *buf; |
287 | ||
288 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
289 | if (!buf) | |
290 | return -ENOMEM; | |
3f542974 PS |
291 | |
292 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 293 | MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 294 | MOS_WDR_TIMEOUT); |
9e221a35 | 295 | *val = buf[0]; |
84fe6e79 | 296 | dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); |
9e221a35 JH |
297 | |
298 | kfree(buf); | |
3f542974 PS |
299 | return ret; |
300 | } | |
301 | ||
302 | /* | |
303 | * mos7840_set_uart_reg | |
304 | * To set the Uart register by calling usb_fill_control_urb function by | |
305 | * passing usb_sndctrlpipe function as parameter. | |
306 | */ | |
307 | ||
308 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
309 | __u16 val) | |
310 | { | |
311 | ||
312 | struct usb_device *dev = port->serial->dev; | |
313 | val = val & 0x00ff; | |
880af9db AC |
314 | /* For the UART control registers, the application number need |
315 | to be Or'ed */ | |
0de9a702 | 316 | if (port->serial->num_ports == 4) { |
880af9db AC |
317 | val |= (((__u16) port->number - |
318 | (__u16) (port->serial->minor)) + 1) << 8; | |
84fe6e79 | 319 | dbg("mos7840_set_uart_reg application number is %x", val); |
3f542974 PS |
320 | } else { |
321 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 322 | val |= (((__u16) port->number - |
3f542974 | 323 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 324 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
325 | val); |
326 | } else { | |
327 | val |= | |
328 | (((__u16) port->number - | |
329 | (__u16) (port->serial->minor)) + 2) << 8; | |
84fe6e79 | 330 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
331 | val); |
332 | } | |
333 | } | |
334 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
335 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
336 | MOS_WDR_TIMEOUT); | |
337 | ||
338 | } | |
339 | ||
340 | /* | |
341 | * mos7840_get_uart_reg | |
342 | * To set the Control register by calling usb_fill_control_urb function | |
343 | * by passing usb_rcvctrlpipe function as parameter. | |
344 | */ | |
345 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
880af9db | 346 | __u16 *val) |
3f542974 PS |
347 | { |
348 | struct usb_device *dev = port->serial->dev; | |
349 | int ret = 0; | |
350 | __u16 Wval; | |
9e221a35 JH |
351 | u8 *buf; |
352 | ||
353 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
354 | if (!buf) | |
355 | return -ENOMEM; | |
3f542974 | 356 | |
84fe6e79 | 357 | /* dbg("application number is %4x", |
880af9db AC |
358 | (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ |
359 | /* Wval is same as application number */ | |
0de9a702 | 360 | if (port->serial->num_ports == 4) { |
3f542974 PS |
361 | Wval = |
362 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
363 | 1) << 8; | |
84fe6e79 | 364 | dbg("mos7840_get_uart_reg application number is %x", Wval); |
3f542974 PS |
365 | } else { |
366 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 367 | Wval = (((__u16) port->number - |
3f542974 | 368 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 369 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
370 | Wval); |
371 | } else { | |
880af9db | 372 | Wval = (((__u16) port->number - |
3f542974 | 373 | (__u16) (port->serial->minor)) + 2) << 8; |
84fe6e79 | 374 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
375 | Wval); |
376 | } | |
377 | } | |
378 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 379 | MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 380 | MOS_WDR_TIMEOUT); |
9e221a35 JH |
381 | *val = buf[0]; |
382 | ||
383 | kfree(buf); | |
3f542974 PS |
384 | return ret; |
385 | } | |
386 | ||
387 | static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) | |
388 | { | |
389 | ||
84fe6e79 TC |
390 | dbg("***************************************"); |
391 | dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); | |
392 | dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); | |
393 | dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); | |
394 | dbg("***************************************"); | |
3f542974 PS |
395 | |
396 | } | |
397 | ||
398 | /************************************************************************/ | |
399 | /************************************************************************/ | |
400 | /* I N T E R F A C E F U N C T I O N S */ | |
401 | /* I N T E R F A C E F U N C T I O N S */ | |
402 | /************************************************************************/ | |
403 | /************************************************************************/ | |
404 | ||
405 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
406 | struct moschip_port *data) | |
407 | { | |
408 | usb_set_serial_port_data(port, (void *)data); | |
409 | } | |
410 | ||
411 | static inline struct moschip_port *mos7840_get_port_private(struct | |
412 | usb_serial_port | |
413 | *port) | |
414 | { | |
415 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
416 | } | |
417 | ||
0de9a702 | 418 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
3f542974 PS |
419 | { |
420 | struct moschip_port *mos7840_port; | |
421 | struct async_icount *icount; | |
422 | mos7840_port = port; | |
423 | icount = &mos7840_port->icount; | |
424 | if (new_msr & | |
425 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
426 | MOS_MSR_DELTA_CD)) { | |
427 | icount = &mos7840_port->icount; | |
428 | ||
429 | /* update input line counters */ | |
430 | if (new_msr & MOS_MSR_DELTA_CTS) { | |
431 | icount->cts++; | |
0de9a702 | 432 | smp_wmb(); |
3f542974 PS |
433 | } |
434 | if (new_msr & MOS_MSR_DELTA_DSR) { | |
435 | icount->dsr++; | |
0de9a702 | 436 | smp_wmb(); |
3f542974 PS |
437 | } |
438 | if (new_msr & MOS_MSR_DELTA_CD) { | |
439 | icount->dcd++; | |
0de9a702 | 440 | smp_wmb(); |
3f542974 PS |
441 | } |
442 | if (new_msr & MOS_MSR_DELTA_RI) { | |
443 | icount->rng++; | |
0de9a702 | 444 | smp_wmb(); |
3f542974 PS |
445 | } |
446 | } | |
3f542974 PS |
447 | } |
448 | ||
0de9a702 | 449 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
3f542974 PS |
450 | { |
451 | struct async_icount *icount; | |
452 | ||
441b62c1 | 453 | dbg("%s - %02x", __func__, new_lsr); |
3f542974 PS |
454 | |
455 | if (new_lsr & SERIAL_LSR_BI) { | |
880af9db AC |
456 | /* |
457 | * Parity and Framing errors only count if they | |
458 | * occur exclusive of a break being | |
459 | * received. | |
460 | */ | |
3f542974 PS |
461 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
462 | } | |
463 | ||
464 | /* update input line counters */ | |
465 | icount = &port->icount; | |
466 | if (new_lsr & SERIAL_LSR_BI) { | |
467 | icount->brk++; | |
0de9a702 | 468 | smp_wmb(); |
3f542974 PS |
469 | } |
470 | if (new_lsr & SERIAL_LSR_OE) { | |
471 | icount->overrun++; | |
0de9a702 | 472 | smp_wmb(); |
3f542974 PS |
473 | } |
474 | if (new_lsr & SERIAL_LSR_PE) { | |
475 | icount->parity++; | |
0de9a702 | 476 | smp_wmb(); |
3f542974 PS |
477 | } |
478 | if (new_lsr & SERIAL_LSR_FE) { | |
479 | icount->frame++; | |
0de9a702 | 480 | smp_wmb(); |
3f542974 | 481 | } |
3f542974 PS |
482 | } |
483 | ||
484 | /************************************************************************/ | |
485 | /************************************************************************/ | |
486 | /* U S B C A L L B A C K F U N C T I O N S */ | |
487 | /* U S B C A L L B A C K F U N C T I O N S */ | |
488 | /************************************************************************/ | |
489 | /************************************************************************/ | |
490 | ||
7d12e780 | 491 | static void mos7840_control_callback(struct urb *urb) |
3f542974 PS |
492 | { |
493 | unsigned char *data; | |
494 | struct moschip_port *mos7840_port; | |
495 | __u8 regval = 0x0; | |
0de9a702 | 496 | int result = 0; |
0643c724 | 497 | int status = urb->status; |
3f542974 | 498 | |
cdc97792 | 499 | mos7840_port = urb->context; |
0de9a702 | 500 | |
0643c724 | 501 | switch (status) { |
3f542974 PS |
502 | case 0: |
503 | /* success */ | |
504 | break; | |
505 | case -ECONNRESET: | |
506 | case -ENOENT: | |
507 | case -ESHUTDOWN: | |
508 | /* this urb is terminated, clean up */ | |
441b62c1 | 509 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 510 | status); |
3f542974 PS |
511 | return; |
512 | default: | |
441b62c1 | 513 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 514 | status); |
3f542974 PS |
515 | goto exit; |
516 | } | |
517 | ||
84fe6e79 TC |
518 | dbg("%s urb buffer size is %d", __func__, urb->actual_length); |
519 | dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, | |
3f542974 PS |
520 | mos7840_port->MsrLsr, mos7840_port->port_num); |
521 | data = urb->transfer_buffer; | |
522 | regval = (__u8) data[0]; | |
84fe6e79 | 523 | dbg("%s data is %x", __func__, regval); |
3f542974 PS |
524 | if (mos7840_port->MsrLsr == 0) |
525 | mos7840_handle_new_msr(mos7840_port, regval); | |
526 | else if (mos7840_port->MsrLsr == 1) | |
527 | mos7840_handle_new_lsr(mos7840_port, regval); | |
528 | ||
0de9a702 ON |
529 | exit: |
530 | spin_lock(&mos7840_port->pool_lock); | |
531 | if (!mos7840_port->zombie) | |
532 | result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); | |
533 | spin_unlock(&mos7840_port->pool_lock); | |
534 | if (result) { | |
535 | dev_err(&urb->dev->dev, | |
536 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 537 | __func__, result); |
0de9a702 | 538 | } |
3f542974 PS |
539 | } |
540 | ||
541 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
880af9db | 542 | __u16 *val) |
3f542974 PS |
543 | { |
544 | struct usb_device *dev = mcs->port->serial->dev; | |
0de9a702 ON |
545 | struct usb_ctrlrequest *dr = mcs->dr; |
546 | unsigned char *buffer = mcs->ctrl_buf; | |
547 | int ret; | |
3f542974 | 548 | |
3f542974 PS |
549 | dr->bRequestType = MCS_RD_RTYPE; |
550 | dr->bRequest = MCS_RDREQ; | |
880af9db | 551 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
3f542974 PS |
552 | dr->wIndex = cpu_to_le16(reg); |
553 | dr->wLength = cpu_to_le16(2); | |
554 | ||
555 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
556 | (unsigned char *)dr, buffer, 2, | |
557 | mos7840_control_callback, mcs); | |
558 | mcs->control_urb->transfer_buffer_length = 2; | |
559 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | /***************************************************************************** | |
564 | * mos7840_interrupt_callback | |
565 | * this is the callback function for when we have received data on the | |
566 | * interrupt endpoint. | |
567 | *****************************************************************************/ | |
568 | ||
7d12e780 | 569 | static void mos7840_interrupt_callback(struct urb *urb) |
3f542974 PS |
570 | { |
571 | int result; | |
572 | int length; | |
573 | struct moschip_port *mos7840_port; | |
574 | struct usb_serial *serial; | |
575 | __u16 Data; | |
576 | unsigned char *data; | |
577 | __u8 sp[5], st; | |
0de9a702 ON |
578 | int i, rv = 0; |
579 | __u16 wval, wreg = 0; | |
0643c724 | 580 | int status = urb->status; |
3f542974 | 581 | |
84fe6e79 | 582 | dbg("%s", " : Entering"); |
3f542974 | 583 | |
0643c724 | 584 | switch (status) { |
3f542974 PS |
585 | case 0: |
586 | /* success */ | |
587 | break; | |
588 | case -ECONNRESET: | |
589 | case -ENOENT: | |
590 | case -ESHUTDOWN: | |
591 | /* this urb is terminated, clean up */ | |
441b62c1 | 592 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 593 | status); |
3f542974 PS |
594 | return; |
595 | default: | |
441b62c1 | 596 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 597 | status); |
3f542974 PS |
598 | goto exit; |
599 | } | |
600 | ||
601 | length = urb->actual_length; | |
602 | data = urb->transfer_buffer; | |
603 | ||
cdc97792 | 604 | serial = urb->context; |
3f542974 PS |
605 | |
606 | /* Moschip get 5 bytes | |
607 | * Byte 1 IIR Port 1 (port.number is 0) | |
608 | * Byte 2 IIR Port 2 (port.number is 1) | |
609 | * Byte 3 IIR Port 3 (port.number is 2) | |
610 | * Byte 4 IIR Port 4 (port.number is 3) | |
611 | * Byte 5 FIFO status for both */ | |
612 | ||
613 | if (length && length > 5) { | |
84fe6e79 | 614 | dbg("%s", "Wrong data !!!"); |
3f542974 PS |
615 | return; |
616 | } | |
617 | ||
618 | sp[0] = (__u8) data[0]; | |
619 | sp[1] = (__u8) data[1]; | |
620 | sp[2] = (__u8) data[2]; | |
621 | sp[3] = (__u8) data[3]; | |
622 | st = (__u8) data[4]; | |
623 | ||
624 | for (i = 0; i < serial->num_ports; i++) { | |
625 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
626 | wval = | |
627 | (((__u16) serial->port[i]->number - | |
628 | (__u16) (serial->minor)) + 1) << 8; | |
629 | if (mos7840_port->open) { | |
630 | if (sp[i] & 0x01) { | |
84fe6e79 | 631 | dbg("SP%d No Interrupt !!!", i); |
3f542974 PS |
632 | } else { |
633 | switch (sp[i] & 0x0f) { | |
634 | case SERIAL_IIR_RLS: | |
635 | dbg("Serial Port %d: Receiver status error or ", i); | |
84fe6e79 | 636 | dbg("address bit detected in 9-bit mode"); |
3f542974 | 637 | mos7840_port->MsrLsr = 1; |
0de9a702 | 638 | wreg = LINE_STATUS_REGISTER; |
3f542974 PS |
639 | break; |
640 | case SERIAL_IIR_MS: | |
84fe6e79 | 641 | dbg("Serial Port %d: Modem status change", i); |
3f542974 | 642 | mos7840_port->MsrLsr = 0; |
0de9a702 | 643 | wreg = MODEM_STATUS_REGISTER; |
3f542974 PS |
644 | break; |
645 | } | |
0de9a702 ON |
646 | spin_lock(&mos7840_port->pool_lock); |
647 | if (!mos7840_port->zombie) { | |
648 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); | |
649 | } else { | |
650 | spin_unlock(&mos7840_port->pool_lock); | |
651 | return; | |
652 | } | |
653 | spin_unlock(&mos7840_port->pool_lock); | |
3f542974 PS |
654 | } |
655 | } | |
656 | } | |
880af9db AC |
657 | if (!(rv < 0)) |
658 | /* the completion handler for the control urb will resubmit */ | |
0de9a702 ON |
659 | return; |
660 | exit: | |
3f542974 PS |
661 | result = usb_submit_urb(urb, GFP_ATOMIC); |
662 | if (result) { | |
663 | dev_err(&urb->dev->dev, | |
664 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 665 | __func__, result); |
3f542974 | 666 | } |
3f542974 PS |
667 | } |
668 | ||
669 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
670 | const char *function) | |
671 | { | |
672 | if (!port) { | |
673 | dbg("%s - port == NULL", function); | |
674 | return -1; | |
675 | } | |
676 | if (!port->serial) { | |
677 | dbg("%s - port->serial == NULL", function); | |
678 | return -1; | |
679 | } | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
685 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
686 | const char *function) | |
687 | { | |
688 | if (!serial) { | |
689 | dbg("%s - serial == NULL", function); | |
690 | return -1; | |
691 | } | |
692 | if (!serial->type) { | |
693 | dbg("%s - serial->type == NULL!", function); | |
694 | return -1; | |
695 | } | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
701 | const char *function) | |
702 | { | |
703 | /* if no port was specified, or it fails a paranoia check */ | |
704 | if (!port || | |
705 | mos7840_port_paranoia_check(port, function) || | |
706 | mos7840_serial_paranoia_check(port->serial, function)) { | |
880af9db AC |
707 | /* then say that we don't have a valid usb_serial thing, |
708 | * which will end up genrating -ENODEV return values */ | |
3f542974 PS |
709 | return NULL; |
710 | } | |
711 | ||
712 | return port->serial; | |
713 | } | |
714 | ||
715 | /***************************************************************************** | |
716 | * mos7840_bulk_in_callback | |
717 | * this is the callback function for when we have received data on the | |
718 | * bulk in endpoint. | |
719 | *****************************************************************************/ | |
720 | ||
7d12e780 | 721 | static void mos7840_bulk_in_callback(struct urb *urb) |
3f542974 | 722 | { |
0643c724 | 723 | int retval; |
3f542974 PS |
724 | unsigned char *data; |
725 | struct usb_serial *serial; | |
726 | struct usb_serial_port *port; | |
727 | struct moschip_port *mos7840_port; | |
728 | struct tty_struct *tty; | |
0643c724 | 729 | int status = urb->status; |
3f542974 | 730 | |
cdc97792 | 731 | mos7840_port = urb->context; |
3f542974 | 732 | if (!mos7840_port) { |
84fe6e79 | 733 | dbg("%s", "NULL mos7840_port pointer"); |
50de36f7 GKH |
734 | mos7840_port->read_urb_busy = false; |
735 | return; | |
736 | } | |
737 | ||
738 | if (status) { | |
739 | dbg("nonzero read bulk status received: %d", status); | |
740 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
741 | return; |
742 | } | |
743 | ||
744 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 745 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 746 | dbg("%s", "Port Paranoia failed"); |
50de36f7 | 747 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
748 | return; |
749 | } | |
750 | ||
441b62c1 | 751 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 752 | if (!serial) { |
84fe6e79 | 753 | dbg("%s", "Bad serial pointer"); |
50de36f7 | 754 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
755 | return; |
756 | } | |
757 | ||
84fe6e79 | 758 | dbg("%s", "Entering... "); |
3f542974 PS |
759 | |
760 | data = urb->transfer_buffer; | |
761 | ||
84fe6e79 | 762 | dbg("%s", "Entering ..........."); |
3f542974 PS |
763 | |
764 | if (urb->actual_length) { | |
4a90f09b | 765 | tty = tty_port_tty_get(&mos7840_port->port->port); |
3f542974 | 766 | if (tty) { |
3f542974 | 767 | tty_insert_flip_string(tty, data, urb->actual_length); |
84fe6e79 | 768 | dbg(" %s ", data); |
3f542974 | 769 | tty_flip_buffer_push(tty); |
4a90f09b | 770 | tty_kref_put(tty); |
3f542974 PS |
771 | } |
772 | mos7840_port->icount.rx += urb->actual_length; | |
0de9a702 | 773 | smp_wmb(); |
84fe6e79 | 774 | dbg("mos7840_port->icount.rx is %d:", |
3f542974 PS |
775 | mos7840_port->icount.rx); |
776 | } | |
777 | ||
778 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 779 | dbg("%s", "URB KILLED !!!"); |
50de36f7 | 780 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
781 | return; |
782 | } | |
783 | ||
3f542974 | 784 | |
0de9a702 | 785 | mos7840_port->read_urb->dev = serial->dev; |
3f542974 | 786 | |
50de36f7 | 787 | mos7840_port->read_urb_busy = true; |
0643c724 | 788 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
0de9a702 | 789 | |
0643c724 | 790 | if (retval) { |
50de36f7 GKH |
791 | dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); |
792 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
793 | } |
794 | } | |
795 | ||
796 | /***************************************************************************** | |
797 | * mos7840_bulk_out_data_callback | |
880af9db AC |
798 | * this is the callback function for when we have finished sending |
799 | * serial data on the bulk out endpoint. | |
3f542974 PS |
800 | *****************************************************************************/ |
801 | ||
7d12e780 | 802 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
3f542974 PS |
803 | { |
804 | struct moschip_port *mos7840_port; | |
805 | struct tty_struct *tty; | |
0643c724 | 806 | int status = urb->status; |
0de9a702 ON |
807 | int i; |
808 | ||
cdc97792 | 809 | mos7840_port = urb->context; |
0de9a702 ON |
810 | spin_lock(&mos7840_port->pool_lock); |
811 | for (i = 0; i < NUM_URBS; i++) { | |
812 | if (urb == mos7840_port->write_urb_pool[i]) { | |
813 | mos7840_port->busy[i] = 0; | |
814 | break; | |
815 | } | |
816 | } | |
817 | spin_unlock(&mos7840_port->pool_lock); | |
818 | ||
0643c724 | 819 | if (status) { |
84fe6e79 | 820 | dbg("nonzero write bulk status received:%d", status); |
3f542974 PS |
821 | return; |
822 | } | |
823 | ||
441b62c1 | 824 | if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { |
84fe6e79 | 825 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
826 | return; |
827 | } | |
828 | ||
84fe6e79 | 829 | dbg("%s", "Entering ........."); |
3f542974 | 830 | |
4a90f09b | 831 | tty = tty_port_tty_get(&mos7840_port->port->port); |
b963a844 JS |
832 | if (tty && mos7840_port->open) |
833 | tty_wakeup(tty); | |
4a90f09b | 834 | tty_kref_put(tty); |
3f542974 PS |
835 | |
836 | } | |
837 | ||
838 | /************************************************************************/ | |
839 | /* 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 */ | |
840 | /************************************************************************/ | |
841 | #ifdef MCSSerialProbe | |
842 | static int mos7840_serial_probe(struct usb_serial *serial, | |
843 | const struct usb_device_id *id) | |
844 | { | |
845 | ||
846 | /*need to implement the mode_reg reading and updating\ | |
847 | structures usb_serial_ device_type\ | |
848 | (i.e num_ports, num_bulkin,bulkout etc) */ | |
849 | /* Also we can update the changes attach */ | |
850 | return 1; | |
851 | } | |
852 | #endif | |
853 | ||
854 | /***************************************************************************** | |
855 | * mos7840_open | |
856 | * this function is called by the tty driver when a port is opened | |
857 | * If successful, we return 0 | |
858 | * Otherwise we return a negative error number. | |
859 | *****************************************************************************/ | |
860 | ||
a509a7e4 | 861 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
3f542974 PS |
862 | { |
863 | int response; | |
864 | int j; | |
865 | struct usb_serial *serial; | |
866 | struct urb *urb; | |
867 | __u16 Data; | |
868 | int status; | |
869 | struct moschip_port *mos7840_port; | |
0de9a702 | 870 | struct moschip_port *port0; |
3f542974 | 871 | |
84fe6e79 TC |
872 | dbg ("%s enter", __func__); |
873 | ||
441b62c1 | 874 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 875 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
876 | return -ENODEV; |
877 | } | |
878 | ||
3f542974 PS |
879 | serial = port->serial; |
880 | ||
441b62c1 | 881 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 882 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
883 | return -ENODEV; |
884 | } | |
885 | ||
886 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 887 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 888 | |
0de9a702 | 889 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 PS |
890 | return -ENODEV; |
891 | ||
892 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
893 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
0de9a702 | 894 | port0->open_ports++; |
3f542974 PS |
895 | |
896 | /* Initialising the write urb pool */ | |
897 | for (j = 0; j < NUM_URBS; ++j) { | |
0de9a702 | 898 | urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 PS |
899 | mos7840_port->write_urb_pool[j] = urb; |
900 | ||
901 | if (urb == NULL) { | |
194343d9 | 902 | dev_err(&port->dev, "No more urbs???\n"); |
3f542974 PS |
903 | continue; |
904 | } | |
905 | ||
880af9db AC |
906 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
907 | GFP_KERNEL); | |
3f542974 | 908 | if (!urb->transfer_buffer) { |
0de9a702 ON |
909 | usb_free_urb(urb); |
910 | mos7840_port->write_urb_pool[j] = NULL; | |
194343d9 GKH |
911 | dev_err(&port->dev, |
912 | "%s-out of memory for urb buffers.\n", | |
913 | __func__); | |
3f542974 PS |
914 | continue; |
915 | } | |
916 | } | |
917 | ||
918 | /***************************************************************************** | |
919 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
920 | * | |
921 | * Register Index | |
922 | * 1 : IER | |
923 | * 2 : FCR | |
924 | * 3 : LCR | |
925 | * 4 : MCR | |
926 | * | |
927 | * 0x08 : SP1/2 Control Reg | |
928 | *****************************************************************************/ | |
929 | ||
880af9db | 930 | /* NEED to check the following Block */ |
3f542974 | 931 | |
3f542974 PS |
932 | Data = 0x0; |
933 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
934 | if (status < 0) { | |
84fe6e79 | 935 | dbg("Reading Spreg failed"); |
3f542974 PS |
936 | return -1; |
937 | } | |
938 | Data |= 0x80; | |
939 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
940 | if (status < 0) { | |
84fe6e79 | 941 | dbg("writing Spreg failed"); |
3f542974 PS |
942 | return -1; |
943 | } | |
944 | ||
945 | Data &= ~0x80; | |
946 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
947 | if (status < 0) { | |
84fe6e79 | 948 | dbg("writing Spreg failed"); |
3f542974 PS |
949 | return -1; |
950 | } | |
880af9db | 951 | /* End of block to be checked */ |
3f542974 | 952 | |
3f542974 | 953 | Data = 0x0; |
880af9db AC |
954 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
955 | &Data); | |
3f542974 | 956 | if (status < 0) { |
84fe6e79 | 957 | dbg("Reading Controlreg failed"); |
3f542974 PS |
958 | return -1; |
959 | } | |
880af9db AC |
960 | Data |= 0x08; /* Driver done bit */ |
961 | Data |= 0x20; /* rx_disable */ | |
962 | status = mos7840_set_reg_sync(port, | |
963 | mos7840_port->ControlRegOffset, Data); | |
3f542974 | 964 | if (status < 0) { |
84fe6e79 | 965 | dbg("writing Controlreg failed"); |
3f542974 PS |
966 | return -1; |
967 | } | |
880af9db AC |
968 | /* do register settings here */ |
969 | /* Set all regs to the device default values. */ | |
970 | /*********************************** | |
971 | * First Disable all interrupts. | |
972 | ***********************************/ | |
3f542974 | 973 | Data = 0x00; |
3f542974 PS |
974 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
975 | if (status < 0) { | |
84fe6e79 | 976 | dbg("disabling interrupts failed"); |
3f542974 PS |
977 | return -1; |
978 | } | |
880af9db | 979 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
3f542974 | 980 | Data = 0x00; |
3f542974 PS |
981 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
982 | if (status < 0) { | |
84fe6e79 | 983 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
984 | return -1; |
985 | } | |
986 | ||
987 | Data = 0xcf; | |
3f542974 PS |
988 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
989 | if (status < 0) { | |
84fe6e79 | 990 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
991 | return -1; |
992 | } | |
993 | ||
994 | Data = 0x03; | |
3f542974 PS |
995 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
996 | mos7840_port->shadowLCR = Data; | |
997 | ||
998 | Data = 0x0b; | |
3f542974 PS |
999 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
1000 | mos7840_port->shadowMCR = Data; | |
1001 | ||
1002 | Data = 0x00; | |
3f542974 PS |
1003 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1004 | mos7840_port->shadowLCR = Data; | |
1005 | ||
880af9db | 1006 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1007 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1008 | ||
1009 | Data = 0x0c; | |
3f542974 PS |
1010 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1011 | ||
1012 | Data = 0x0; | |
3f542974 PS |
1013 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1014 | ||
1015 | Data = 0x00; | |
3f542974 PS |
1016 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1017 | ||
1018 | Data = Data & ~SERIAL_LCR_DLAB; | |
3f542974 PS |
1019 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1020 | mos7840_port->shadowLCR = Data; | |
1021 | ||
880af9db | 1022 | /* clearing Bulkin and Bulkout Fifo */ |
3f542974 | 1023 | Data = 0x0; |
3f542974 PS |
1024 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
1025 | ||
1026 | Data = Data | 0x0c; | |
3f542974 PS |
1027 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
1028 | ||
1029 | Data = Data & ~0x0c; | |
3f542974 | 1030 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
880af9db | 1031 | /* Finally enable all interrupts */ |
3f542974 | 1032 | Data = 0x0c; |
3f542974 PS |
1033 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
1034 | ||
880af9db | 1035 | /* clearing rx_disable */ |
3f542974 | 1036 | Data = 0x0; |
880af9db AC |
1037 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1038 | &Data); | |
3f542974 | 1039 | Data = Data & ~0x20; |
880af9db AC |
1040 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1041 | Data); | |
3f542974 | 1042 | |
880af9db | 1043 | /* rx_negate */ |
3f542974 | 1044 | Data = 0x0; |
880af9db AC |
1045 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1046 | &Data); | |
3f542974 | 1047 | Data = Data | 0x10; |
880af9db AC |
1048 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1049 | Data); | |
3f542974 | 1050 | |
880af9db AC |
1051 | /* Check to see if we've set up our endpoint info yet * |
1052 | * (can't set it up in mos7840_startup as the structures * | |
1053 | * were not set up at that time.) */ | |
0de9a702 | 1054 | if (port0->open_ports == 1) { |
3f542974 | 1055 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
3f542974 | 1056 | /* set up interrupt urb */ |
3f542974 | 1057 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
880af9db AC |
1058 | serial->dev, |
1059 | usb_rcvintpipe(serial->dev, | |
1060 | serial->port[0]->interrupt_in_endpointAddress), | |
1061 | serial->port[0]->interrupt_in_buffer, | |
1062 | serial->port[0]->interrupt_in_urb-> | |
1063 | transfer_buffer_length, | |
1064 | mos7840_interrupt_callback, | |
1065 | serial, | |
1066 | serial->port[0]->interrupt_in_urb->interval); | |
3f542974 PS |
1067 | |
1068 | /* start interrupt read for mos7840 * | |
1069 | * will continue as long as mos7840 is connected */ | |
1070 | ||
1071 | response = | |
1072 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1073 | GFP_KERNEL); | |
1074 | if (response) { | |
194343d9 GKH |
1075 | dev_err(&port->dev, "%s - Error %d submitting " |
1076 | "interrupt urb\n", __func__, response); | |
3f542974 PS |
1077 | } |
1078 | ||
1079 | } | |
1080 | ||
1081 | } | |
1082 | ||
1083 | /* see if we've set up our endpoint info yet * | |
1084 | * (can't set it up in mos7840_startup as the * | |
1085 | * structures were not set up at that time.) */ | |
1086 | ||
84fe6e79 TC |
1087 | dbg("port number is %d", port->number); |
1088 | dbg("serial number is %d", port->serial->minor); | |
1089 | dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); | |
1090 | dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); | |
1091 | dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); | |
1092 | dbg("port's number in the device is %d", mos7840_port->port_num); | |
3f542974 PS |
1093 | mos7840_port->read_urb = port->read_urb; |
1094 | ||
1095 | /* set up our bulk in urb */ | |
1096 | ||
1097 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1098 | serial->dev, | |
1099 | usb_rcvbulkpipe(serial->dev, | |
1100 | port->bulk_in_endpointAddress), | |
1101 | port->bulk_in_buffer, | |
1102 | mos7840_port->read_urb->transfer_buffer_length, | |
1103 | mos7840_bulk_in_callback, mos7840_port); | |
1104 | ||
84fe6e79 | 1105 | dbg("mos7840_open: bulkin endpoint is %d", |
3f542974 | 1106 | port->bulk_in_endpointAddress); |
50de36f7 | 1107 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
1108 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
1109 | if (response) { | |
194343d9 GKH |
1110 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
1111 | __func__, response); | |
50de36f7 | 1112 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1113 | } |
1114 | ||
1115 | /* initialize our wait queues */ | |
1116 | init_waitqueue_head(&mos7840_port->wait_chase); | |
1117 | init_waitqueue_head(&mos7840_port->delta_msr_wait); | |
1118 | ||
1119 | /* initialize our icount structure */ | |
1120 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); | |
1121 | ||
1122 | /* initialize our port settings */ | |
880af9db AC |
1123 | /* Must set to enable ints! */ |
1124 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
3f542974 PS |
1125 | /* send a open port command */ |
1126 | mos7840_port->open = 1; | |
880af9db | 1127 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
3f542974 PS |
1128 | mos7840_port->icount.tx = 0; |
1129 | mos7840_port->icount.rx = 0; | |
1130 | ||
84fe6e79 | 1131 | dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", |
880af9db | 1132 | serial, mos7840_port, port); |
3f542974 | 1133 | |
84fe6e79 TC |
1134 | dbg ("%s leave", __func__); |
1135 | ||
3f542974 PS |
1136 | return 0; |
1137 | ||
1138 | } | |
1139 | ||
1140 | /***************************************************************************** | |
1141 | * mos7840_chars_in_buffer | |
1142 | * this function is called by the tty driver when it wants to know how many | |
1143 | * bytes of data we currently have outstanding in the port (data that has | |
1144 | * been written, but hasn't made it out the port yet) | |
1145 | * If successful, we return the number of bytes left to be written in the | |
1146 | * system, | |
95da310e | 1147 | * Otherwise we return zero. |
3f542974 PS |
1148 | *****************************************************************************/ |
1149 | ||
95da310e | 1150 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
3f542974 | 1151 | { |
95da310e | 1152 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1153 | int i; |
1154 | int chars = 0; | |
0de9a702 | 1155 | unsigned long flags; |
3f542974 PS |
1156 | struct moschip_port *mos7840_port; |
1157 | ||
84fe6e79 | 1158 | dbg("%s", " mos7840_chars_in_buffer:entering ..........."); |
3f542974 | 1159 | |
441b62c1 | 1160 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1161 | dbg("%s", "Invalid port"); |
95da310e | 1162 | return 0; |
3f542974 PS |
1163 | } |
1164 | ||
1165 | mos7840_port = mos7840_get_port_private(port); | |
1166 | if (mos7840_port == NULL) { | |
84fe6e79 | 1167 | dbg("%s", "mos7840_break:leaving ..........."); |
95da310e | 1168 | return 0; |
3f542974 PS |
1169 | } |
1170 | ||
880af9db | 1171 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
95da310e AC |
1172 | for (i = 0; i < NUM_URBS; ++i) |
1173 | if (mos7840_port->busy[i]) | |
3f542974 | 1174 | chars += URB_TRANSFER_BUFFER_SIZE; |
880af9db | 1175 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
441b62c1 | 1176 | dbg("%s - returns %d", __func__, chars); |
0de9a702 | 1177 | return chars; |
3f542974 PS |
1178 | |
1179 | } | |
1180 | ||
3f542974 PS |
1181 | /***************************************************************************** |
1182 | * mos7840_close | |
1183 | * this function is called by the tty driver when a port is closed | |
1184 | *****************************************************************************/ | |
1185 | ||
335f8514 | 1186 | static void mos7840_close(struct usb_serial_port *port) |
3f542974 PS |
1187 | { |
1188 | struct usb_serial *serial; | |
1189 | struct moschip_port *mos7840_port; | |
0de9a702 | 1190 | struct moschip_port *port0; |
3f542974 PS |
1191 | int j; |
1192 | __u16 Data; | |
1193 | ||
84fe6e79 | 1194 | dbg("%s", "mos7840_close:entering..."); |
3f542974 | 1195 | |
441b62c1 | 1196 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1197 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1198 | return; |
1199 | } | |
1200 | ||
441b62c1 | 1201 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1202 | if (!serial) { |
84fe6e79 | 1203 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1204 | return; |
1205 | } | |
1206 | ||
1207 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 1208 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 1209 | |
0de9a702 | 1210 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 | 1211 | return; |
3f542974 PS |
1212 | |
1213 | for (j = 0; j < NUM_URBS; ++j) | |
1214 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1215 | ||
1216 | /* Freeing Write URBs */ | |
1217 | for (j = 0; j < NUM_URBS; ++j) { | |
1218 | if (mos7840_port->write_urb_pool[j]) { | |
1219 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1220 | kfree(mos7840_port->write_urb_pool[j]-> | |
1221 | transfer_buffer); | |
1222 | ||
1223 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1224 | } | |
1225 | } | |
1226 | ||
3f542974 PS |
1227 | /* While closing port, shutdown all bulk read, write * |
1228 | * and interrupt read if they exists */ | |
1229 | if (serial->dev) { | |
3f542974 | 1230 | if (mos7840_port->write_urb) { |
84fe6e79 | 1231 | dbg("%s", "Shutdown bulk write"); |
3f542974 PS |
1232 | usb_kill_urb(mos7840_port->write_urb); |
1233 | } | |
3f542974 | 1234 | if (mos7840_port->read_urb) { |
84fe6e79 | 1235 | dbg("%s", "Shutdown bulk read"); |
3f542974 | 1236 | usb_kill_urb(mos7840_port->read_urb); |
50de36f7 | 1237 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1238 | } |
1239 | if ((&mos7840_port->control_urb)) { | |
84fe6e79 | 1240 | dbg("%s", "Shutdown control read"); |
880af9db | 1241 | /*/ usb_kill_urb (mos7840_port->control_urb); */ |
3f542974 PS |
1242 | } |
1243 | } | |
880af9db AC |
1244 | /* if(mos7840_port->ctrl_buf != NULL) */ |
1245 | /* kfree(mos7840_port->ctrl_buf); */ | |
0de9a702 | 1246 | port0->open_ports--; |
84fe6e79 | 1247 | dbg("mos7840_num_open_ports in close%d:in port%d", |
0de9a702 ON |
1248 | port0->open_ports, port->number); |
1249 | if (port0->open_ports == 0) { | |
3f542974 | 1250 | if (serial->port[0]->interrupt_in_urb) { |
84fe6e79 | 1251 | dbg("%s", "Shutdown interrupt_in_urb"); |
0de9a702 | 1252 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
3f542974 PS |
1253 | } |
1254 | } | |
1255 | ||
1256 | if (mos7840_port->write_urb) { | |
1257 | /* if this urb had a transfer buffer already (old tx) free it */ | |
880af9db | 1258 | if (mos7840_port->write_urb->transfer_buffer != NULL) |
3f542974 | 1259 | kfree(mos7840_port->write_urb->transfer_buffer); |
3f542974 PS |
1260 | usb_free_urb(mos7840_port->write_urb); |
1261 | } | |
1262 | ||
1263 | Data = 0x0; | |
1264 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1265 | ||
1266 | Data = 0x00; | |
1267 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1268 | ||
1269 | mos7840_port->open = 0; | |
1270 | ||
84fe6e79 | 1271 | dbg("%s", "Leaving ............"); |
3f542974 PS |
1272 | } |
1273 | ||
1274 | /************************************************************************ | |
1275 | * | |
1276 | * mos7840_block_until_chase_response | |
1277 | * | |
1278 | * This function will block the close until one of the following: | |
1279 | * 1. Response to our Chase comes from mos7840 | |
dc0d5c1e | 1280 | * 2. A timeout of 10 seconds without activity has expired |
3f542974 PS |
1281 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
1282 | * | |
1283 | ************************************************************************/ | |
1284 | ||
95da310e AC |
1285 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
1286 | struct moschip_port *mos7840_port) | |
3f542974 PS |
1287 | { |
1288 | int timeout = 1 * HZ; | |
1289 | int wait = 10; | |
1290 | int count; | |
1291 | ||
1292 | while (1) { | |
95da310e | 1293 | count = mos7840_chars_in_buffer(tty); |
3f542974 PS |
1294 | |
1295 | /* Check for Buffer status */ | |
880af9db | 1296 | if (count <= 0) |
3f542974 | 1297 | return; |
3f542974 PS |
1298 | |
1299 | /* Block the thread for a while */ | |
1300 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1301 | timeout); | |
1302 | /* No activity.. count down section */ | |
1303 | wait--; | |
1304 | if (wait == 0) { | |
441b62c1 | 1305 | dbg("%s - TIMEOUT", __func__); |
3f542974 PS |
1306 | return; |
1307 | } else { | |
dc0d5c1e | 1308 | /* Reset timeout value back to seconds */ |
3f542974 PS |
1309 | wait = 10; |
1310 | } | |
1311 | } | |
1312 | ||
1313 | } | |
1314 | ||
1315 | /***************************************************************************** | |
1316 | * mos7840_break | |
1317 | * this function sends a break to the port | |
1318 | *****************************************************************************/ | |
95da310e | 1319 | static void mos7840_break(struct tty_struct *tty, int break_state) |
3f542974 | 1320 | { |
95da310e | 1321 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1322 | unsigned char data; |
1323 | struct usb_serial *serial; | |
1324 | struct moschip_port *mos7840_port; | |
1325 | ||
84fe6e79 TC |
1326 | dbg("%s", "Entering ..........."); |
1327 | dbg("mos7840_break: Start"); | |
3f542974 | 1328 | |
441b62c1 | 1329 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1330 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1331 | return; |
1332 | } | |
1333 | ||
441b62c1 | 1334 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1335 | if (!serial) { |
84fe6e79 | 1336 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1337 | return; |
1338 | } | |
1339 | ||
1340 | mos7840_port = mos7840_get_port_private(port); | |
1341 | ||
880af9db | 1342 | if (mos7840_port == NULL) |
3f542974 | 1343 | return; |
3f542974 | 1344 | |
95da310e | 1345 | if (serial->dev) |
3f542974 | 1346 | /* flush and block until tx is empty */ |
95da310e | 1347 | mos7840_block_until_chase_response(tty, mos7840_port); |
3f542974 | 1348 | |
95da310e | 1349 | if (break_state == -1) |
3f542974 | 1350 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
95da310e | 1351 | else |
3f542974 | 1352 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
3f542974 | 1353 | |
6b447f04 | 1354 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
3f542974 | 1355 | mos7840_port->shadowLCR = data; |
84fe6e79 | 1356 | dbg("mcs7840_break mos7840_port->shadowLCR is %x", |
3f542974 PS |
1357 | mos7840_port->shadowLCR); |
1358 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, | |
1359 | mos7840_port->shadowLCR); | |
1360 | ||
1361 | return; | |
1362 | } | |
1363 | ||
1364 | /***************************************************************************** | |
1365 | * mos7840_write_room | |
1366 | * this function is called by the tty driver when it wants to know how many | |
1367 | * bytes of data we can accept for a specific port. | |
1368 | * If successful, we return the amount of room that we have for this port | |
1369 | * Otherwise we return a negative error number. | |
1370 | *****************************************************************************/ | |
1371 | ||
95da310e | 1372 | static int mos7840_write_room(struct tty_struct *tty) |
3f542974 | 1373 | { |
95da310e | 1374 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1375 | int i; |
1376 | int room = 0; | |
0de9a702 | 1377 | unsigned long flags; |
3f542974 PS |
1378 | struct moschip_port *mos7840_port; |
1379 | ||
84fe6e79 | 1380 | dbg("%s", " mos7840_write_room:entering ..........."); |
3f542974 | 1381 | |
441b62c1 | 1382 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 TC |
1383 | dbg("%s", "Invalid port"); |
1384 | dbg("%s", " mos7840_write_room:leaving ..........."); | |
3f542974 PS |
1385 | return -1; |
1386 | } | |
1387 | ||
1388 | mos7840_port = mos7840_get_port_private(port); | |
1389 | if (mos7840_port == NULL) { | |
84fe6e79 | 1390 | dbg("%s", "mos7840_break:leaving ..........."); |
3f542974 PS |
1391 | return -1; |
1392 | } | |
1393 | ||
0de9a702 | 1394 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1395 | for (i = 0; i < NUM_URBS; ++i) { |
880af9db | 1396 | if (!mos7840_port->busy[i]) |
3f542974 | 1397 | room += URB_TRANSFER_BUFFER_SIZE; |
3f542974 | 1398 | } |
0de9a702 | 1399 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 | 1400 | |
0de9a702 | 1401 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
441b62c1 | 1402 | dbg("%s - returns %d", __func__, room); |
0de9a702 | 1403 | return room; |
3f542974 PS |
1404 | |
1405 | } | |
1406 | ||
1407 | /***************************************************************************** | |
1408 | * mos7840_write | |
1409 | * this function is called by the tty driver when data should be written to | |
1410 | * the port. | |
1411 | * If successful, we return the number of bytes written, otherwise we | |
1412 | * return a negative error number. | |
1413 | *****************************************************************************/ | |
1414 | ||
95da310e | 1415 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
3f542974 PS |
1416 | const unsigned char *data, int count) |
1417 | { | |
1418 | int status; | |
1419 | int i; | |
1420 | int bytes_sent = 0; | |
1421 | int transfer_size; | |
0de9a702 | 1422 | unsigned long flags; |
3f542974 PS |
1423 | |
1424 | struct moschip_port *mos7840_port; | |
1425 | struct usb_serial *serial; | |
1426 | struct urb *urb; | |
880af9db | 1427 | /* __u16 Data; */ |
3f542974 PS |
1428 | const unsigned char *current_position = data; |
1429 | unsigned char *data1; | |
84fe6e79 TC |
1430 | dbg("%s", "entering ..........."); |
1431 | /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
880af9db | 1432 | mos7840_port->shadowLCR); */ |
3f542974 PS |
1433 | |
1434 | #ifdef NOTMOS7840 | |
1435 | Data = 0x00; | |
3f542974 PS |
1436 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1437 | mos7840_port->shadowLCR = Data; | |
84fe6e79 TC |
1438 | dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); |
1439 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
3f542974 PS |
1440 | mos7840_port->shadowLCR); |
1441 | ||
880af9db AC |
1442 | /* Data = 0x03; */ |
1443 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ | |
1444 | /* mos7840_port->shadowLCR=Data;//Need to add later */ | |
3f542974 | 1445 | |
880af9db | 1446 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1447 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1448 | ||
880af9db AC |
1449 | /* Data = 0x0c; */ |
1450 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ | |
3f542974 | 1451 | Data = 0x00; |
3f542974 | 1452 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
84fe6e79 | 1453 | dbg("mos7840_write:DLL value is %x", Data); |
3f542974 PS |
1454 | |
1455 | Data = 0x0; | |
3f542974 | 1456 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
84fe6e79 | 1457 | dbg("mos7840_write:DLM value is %x", Data); |
3f542974 PS |
1458 | |
1459 | Data = Data & ~SERIAL_LCR_DLAB; | |
84fe6e79 | 1460 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", |
3f542974 | 1461 | mos7840_port->shadowLCR); |
3f542974 PS |
1462 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1463 | #endif | |
1464 | ||
441b62c1 | 1465 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1466 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1467 | return -1; |
1468 | } | |
1469 | ||
1470 | serial = port->serial; | |
441b62c1 | 1471 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 1472 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1473 | return -1; |
1474 | } | |
1475 | ||
1476 | mos7840_port = mos7840_get_port_private(port); | |
1477 | if (mos7840_port == NULL) { | |
84fe6e79 | 1478 | dbg("%s", "mos7840_port is NULL"); |
3f542974 PS |
1479 | return -1; |
1480 | } | |
1481 | ||
1482 | /* try to find a free urb in the list */ | |
1483 | urb = NULL; | |
1484 | ||
0de9a702 | 1485 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1486 | for (i = 0; i < NUM_URBS; ++i) { |
0de9a702 ON |
1487 | if (!mos7840_port->busy[i]) { |
1488 | mos7840_port->busy[i] = 1; | |
3f542974 | 1489 | urb = mos7840_port->write_urb_pool[i]; |
84fe6e79 | 1490 | dbg("URB:%d", i); |
3f542974 PS |
1491 | break; |
1492 | } | |
1493 | } | |
0de9a702 | 1494 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 PS |
1495 | |
1496 | if (urb == NULL) { | |
441b62c1 | 1497 | dbg("%s - no more free urbs", __func__); |
3f542974 PS |
1498 | goto exit; |
1499 | } | |
1500 | ||
1501 | if (urb->transfer_buffer == NULL) { | |
1502 | urb->transfer_buffer = | |
1503 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
1504 | ||
1505 | if (urb->transfer_buffer == NULL) { | |
194343d9 GKH |
1506 | dev_err(&port->dev, "%s no more kernel memory...\n", |
1507 | __func__); | |
3f542974 PS |
1508 | goto exit; |
1509 | } | |
1510 | } | |
1511 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1512 | ||
97c4965d | 1513 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
3f542974 PS |
1514 | |
1515 | /* fill urb with data and submit */ | |
1516 | usb_fill_bulk_urb(urb, | |
1517 | serial->dev, | |
1518 | usb_sndbulkpipe(serial->dev, | |
1519 | port->bulk_out_endpointAddress), | |
1520 | urb->transfer_buffer, | |
1521 | transfer_size, | |
1522 | mos7840_bulk_out_data_callback, mos7840_port); | |
1523 | ||
1524 | data1 = urb->transfer_buffer; | |
84fe6e79 | 1525 | dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); |
3f542974 PS |
1526 | |
1527 | /* send it down the pipe */ | |
1528 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1529 | ||
1530 | if (status) { | |
0de9a702 | 1531 | mos7840_port->busy[i] = 0; |
194343d9 GKH |
1532 | dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " |
1533 | "with status = %d\n", __func__, status); | |
3f542974 PS |
1534 | bytes_sent = status; |
1535 | goto exit; | |
1536 | } | |
1537 | bytes_sent = transfer_size; | |
1538 | mos7840_port->icount.tx += transfer_size; | |
0de9a702 | 1539 | smp_wmb(); |
84fe6e79 | 1540 | dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); |
95da310e | 1541 | exit: |
3f542974 PS |
1542 | return bytes_sent; |
1543 | ||
1544 | } | |
1545 | ||
1546 | /***************************************************************************** | |
1547 | * mos7840_throttle | |
1548 | * this function is called by the tty driver when it wants to stop the data | |
1549 | * being read from the port. | |
1550 | *****************************************************************************/ | |
1551 | ||
95da310e | 1552 | static void mos7840_throttle(struct tty_struct *tty) |
3f542974 | 1553 | { |
95da310e | 1554 | struct usb_serial_port *port = tty->driver_data; |
3f542974 | 1555 | struct moschip_port *mos7840_port; |
3f542974 PS |
1556 | int status; |
1557 | ||
441b62c1 | 1558 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1559 | dbg("%s", "Invalid port"); |
3f542974 PS |
1560 | return; |
1561 | } | |
1562 | ||
84fe6e79 | 1563 | dbg("- port %d", port->number); |
3f542974 PS |
1564 | |
1565 | mos7840_port = mos7840_get_port_private(port); | |
1566 | ||
1567 | if (mos7840_port == NULL) | |
1568 | return; | |
1569 | ||
1570 | if (!mos7840_port->open) { | |
84fe6e79 | 1571 | dbg("%s", "port not opened"); |
3f542974 PS |
1572 | return; |
1573 | } | |
1574 | ||
84fe6e79 | 1575 | dbg("%s", "Entering .........."); |
3f542974 | 1576 | |
3f542974 PS |
1577 | /* if we are implementing XON/XOFF, send the stop character */ |
1578 | if (I_IXOFF(tty)) { | |
1579 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e AC |
1580 | status = mos7840_write(tty, port, &stop_char, 1); |
1581 | if (status <= 0) | |
3f542974 | 1582 | return; |
3f542974 | 1583 | } |
3f542974 PS |
1584 | /* if we are implementing RTS/CTS, toggle that line */ |
1585 | if (tty->termios->c_cflag & CRTSCTS) { | |
1586 | mos7840_port->shadowMCR &= ~MCR_RTS; | |
95da310e | 1587 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1588 | mos7840_port->shadowMCR); |
95da310e | 1589 | if (status < 0) |
3f542974 | 1590 | return; |
3f542974 PS |
1591 | } |
1592 | ||
1593 | return; | |
1594 | } | |
1595 | ||
1596 | /***************************************************************************** | |
1597 | * mos7840_unthrottle | |
880af9db AC |
1598 | * this function is called by the tty driver when it wants to resume |
1599 | * the data being read from the port (called after mos7840_throttle is | |
1600 | * called) | |
3f542974 | 1601 | *****************************************************************************/ |
95da310e | 1602 | static void mos7840_unthrottle(struct tty_struct *tty) |
3f542974 | 1603 | { |
95da310e | 1604 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1605 | int status; |
1606 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1607 | ||
441b62c1 | 1608 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1609 | dbg("%s", "Invalid port"); |
3f542974 PS |
1610 | return; |
1611 | } | |
1612 | ||
1613 | if (mos7840_port == NULL) | |
1614 | return; | |
1615 | ||
1616 | if (!mos7840_port->open) { | |
441b62c1 | 1617 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1618 | return; |
1619 | } | |
1620 | ||
84fe6e79 | 1621 | dbg("%s", "Entering .........."); |
3f542974 | 1622 | |
3f542974 PS |
1623 | /* if we are implementing XON/XOFF, send the start character */ |
1624 | if (I_IXOFF(tty)) { | |
1625 | unsigned char start_char = START_CHAR(tty); | |
95da310e AC |
1626 | status = mos7840_write(tty, port, &start_char, 1); |
1627 | if (status <= 0) | |
3f542974 | 1628 | return; |
3f542974 PS |
1629 | } |
1630 | ||
1631 | /* if we are implementing RTS/CTS, toggle that line */ | |
1632 | if (tty->termios->c_cflag & CRTSCTS) { | |
1633 | mos7840_port->shadowMCR |= MCR_RTS; | |
95da310e | 1634 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1635 | mos7840_port->shadowMCR); |
95da310e | 1636 | if (status < 0) |
3f542974 | 1637 | return; |
3f542974 | 1638 | } |
3f542974 PS |
1639 | } |
1640 | ||
95da310e | 1641 | static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) |
3f542974 | 1642 | { |
95da310e | 1643 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1644 | struct moschip_port *mos7840_port; |
1645 | unsigned int result; | |
1646 | __u16 msr; | |
1647 | __u16 mcr; | |
880af9db | 1648 | int status; |
3f542974 PS |
1649 | mos7840_port = mos7840_get_port_private(port); |
1650 | ||
441b62c1 | 1651 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1652 | |
1653 | if (mos7840_port == NULL) | |
1654 | return -ENODEV; | |
1655 | ||
1656 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
1657 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); | |
1658 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | |
1659 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1660 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1661 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1662 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1663 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1664 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1665 | ||
441b62c1 | 1666 | dbg("%s - 0x%04X", __func__, result); |
3f542974 PS |
1667 | |
1668 | return result; | |
1669 | } | |
1670 | ||
95da310e | 1671 | static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, |
3f542974 PS |
1672 | unsigned int set, unsigned int clear) |
1673 | { | |
95da310e | 1674 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1675 | struct moschip_port *mos7840_port; |
1676 | unsigned int mcr; | |
87521c46 | 1677 | int status; |
3f542974 | 1678 | |
441b62c1 | 1679 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1680 | |
1681 | mos7840_port = mos7840_get_port_private(port); | |
1682 | ||
1683 | if (mos7840_port == NULL) | |
1684 | return -ENODEV; | |
1685 | ||
e2984494 | 1686 | /* FIXME: What locks the port registers ? */ |
3f542974 PS |
1687 | mcr = mos7840_port->shadowMCR; |
1688 | if (clear & TIOCM_RTS) | |
1689 | mcr &= ~MCR_RTS; | |
1690 | if (clear & TIOCM_DTR) | |
1691 | mcr &= ~MCR_DTR; | |
1692 | if (clear & TIOCM_LOOP) | |
1693 | mcr &= ~MCR_LOOPBACK; | |
1694 | ||
1695 | if (set & TIOCM_RTS) | |
1696 | mcr |= MCR_RTS; | |
1697 | if (set & TIOCM_DTR) | |
1698 | mcr |= MCR_DTR; | |
1699 | if (set & TIOCM_LOOP) | |
1700 | mcr |= MCR_LOOPBACK; | |
1701 | ||
1702 | mos7840_port->shadowMCR = mcr; | |
1703 | ||
3f542974 PS |
1704 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
1705 | if (status < 0) { | |
84fe6e79 | 1706 | dbg("setting MODEM_CONTROL_REGISTER Failed"); |
87521c46 | 1707 | return status; |
3f542974 PS |
1708 | } |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | /***************************************************************************** | |
1714 | * mos7840_calc_baud_rate_divisor | |
1715 | * this function calculates the proper baud rate divisor for the specified | |
1716 | * baud rate. | |
1717 | *****************************************************************************/ | |
1718 | static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, | |
880af9db | 1719 | __u16 *clk_sel_val) |
3f542974 PS |
1720 | { |
1721 | ||
441b62c1 | 1722 | dbg("%s - %d", __func__, baudRate); |
3f542974 PS |
1723 | |
1724 | if (baudRate <= 115200) { | |
1725 | *divisor = 115200 / baudRate; | |
1726 | *clk_sel_val = 0x0; | |
1727 | } | |
1728 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1729 | *divisor = 230400 / baudRate; | |
1730 | *clk_sel_val = 0x10; | |
1731 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1732 | *divisor = 403200 / baudRate; | |
1733 | *clk_sel_val = 0x20; | |
1734 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1735 | *divisor = 460800 / baudRate; | |
1736 | *clk_sel_val = 0x30; | |
1737 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1738 | *divisor = 806400 / baudRate; | |
1739 | *clk_sel_val = 0x40; | |
1740 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1741 | *divisor = 921600 / baudRate; | |
1742 | *clk_sel_val = 0x50; | |
1743 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1744 | *divisor = 1572864 / baudRate; | |
1745 | *clk_sel_val = 0x60; | |
1746 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1747 | *divisor = 3145728 / baudRate; | |
1748 | *clk_sel_val = 0x70; | |
1749 | } | |
1750 | return 0; | |
1751 | ||
1752 | #ifdef NOTMCS7840 | |
1753 | ||
1754 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1755 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1756 | *divisor = mos7840_divisor_table[i].Divisor; | |
1757 | return 0; | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | /* After trying for all the standard baud rates * | |
1762 | * Try calculating the divisor for this baud rate */ | |
1763 | ||
1764 | if (baudrate > 75 && baudrate < 230400) { | |
1765 | /* get the divisor */ | |
1766 | custom = (__u16) (230400L / baudrate); | |
1767 | ||
1768 | /* Check for round off */ | |
1769 | round1 = (__u16) (2304000L / baudrate); | |
1770 | round = (__u16) (round1 - (custom * 10)); | |
880af9db | 1771 | if (round > 4) |
3f542974 | 1772 | custom++; |
3f542974 PS |
1773 | *divisor = custom; |
1774 | ||
84fe6e79 | 1775 | dbg(" Baud %d = %d", baudrate, custom); |
3f542974 PS |
1776 | return 0; |
1777 | } | |
1778 | ||
84fe6e79 | 1779 | dbg("%s", " Baud calculation Failed..."); |
3f542974 PS |
1780 | return -1; |
1781 | #endif | |
1782 | } | |
1783 | ||
1784 | /***************************************************************************** | |
1785 | * mos7840_send_cmd_write_baud_rate | |
1786 | * this function sends the proper command to change the baud rate of the | |
1787 | * specified port. | |
1788 | *****************************************************************************/ | |
1789 | ||
1790 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1791 | int baudRate) | |
1792 | { | |
1793 | int divisor = 0; | |
1794 | int status; | |
1795 | __u16 Data; | |
1796 | unsigned char number; | |
1797 | __u16 clk_sel_val; | |
1798 | struct usb_serial_port *port; | |
1799 | ||
1800 | if (mos7840_port == NULL) | |
1801 | return -1; | |
1802 | ||
1803 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 1804 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1805 | dbg("%s", "Invalid port"); |
3f542974 PS |
1806 | return -1; |
1807 | } | |
1808 | ||
441b62c1 | 1809 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1810 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1811 | return -1; |
1812 | } | |
1813 | ||
84fe6e79 | 1814 | dbg("%s", "Entering .........."); |
3f542974 PS |
1815 | |
1816 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; | |
1817 | ||
441b62c1 | 1818 | dbg("%s - port = %d, baud = %d", __func__, |
3f542974 | 1819 | mos7840_port->port->number, baudRate); |
880af9db | 1820 | /* reset clk_uart_sel in spregOffset */ |
3f542974 PS |
1821 | if (baudRate > 115200) { |
1822 | #ifdef HW_flow_control | |
880af9db AC |
1823 | /* NOTE: need to see the pther register to modify */ |
1824 | /* setting h/w flow control bit to 1 */ | |
3f542974 PS |
1825 | Data = 0x2b; |
1826 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1827 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1828 | Data); | |
3f542974 | 1829 | if (status < 0) { |
84fe6e79 | 1830 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1831 | return -1; |
1832 | } | |
1833 | #endif | |
1834 | ||
1835 | } else { | |
1836 | #ifdef HW_flow_control | |
880af9db | 1837 | / *setting h/w flow control bit to 0 */ |
3f542974 PS |
1838 | Data = 0xb; |
1839 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1840 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1841 | Data); | |
3f542974 | 1842 | if (status < 0) { |
84fe6e79 | 1843 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1844 | return -1; |
1845 | } | |
1846 | #endif | |
1847 | ||
1848 | } | |
1849 | ||
880af9db | 1850 | if (1) { /* baudRate <= 115200) */ |
3f542974 PS |
1851 | clk_sel_val = 0x0; |
1852 | Data = 0x0; | |
880af9db | 1853 | status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, |
3f542974 | 1854 | &clk_sel_val); |
880af9db AC |
1855 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
1856 | &Data); | |
3f542974 | 1857 | if (status < 0) { |
84fe6e79 | 1858 | dbg("reading spreg failed in set_serial_baud"); |
3f542974 PS |
1859 | return -1; |
1860 | } | |
1861 | Data = (Data & 0x8f) | clk_sel_val; | |
880af9db AC |
1862 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
1863 | Data); | |
3f542974 | 1864 | if (status < 0) { |
84fe6e79 | 1865 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1866 | return -1; |
1867 | } | |
1868 | /* Calculate the Divisor */ | |
1869 | ||
1870 | if (status) { | |
194343d9 | 1871 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
3f542974 PS |
1872 | return status; |
1873 | } | |
1874 | /* Enable access to divisor latch */ | |
1875 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1876 | mos7840_port->shadowLCR = Data; | |
1877 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1878 | ||
1879 | /* Write the divisor */ | |
1880 | Data = (unsigned char)(divisor & 0xff); | |
84fe6e79 | 1881 | dbg("set_serial_baud Value to write DLL is %x", Data); |
3f542974 PS |
1882 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1883 | ||
1884 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
84fe6e79 | 1885 | dbg("set_serial_baud Value to write DLM is %x", Data); |
3f542974 PS |
1886 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1887 | ||
1888 | /* Disable access to divisor latch */ | |
1889 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1890 | mos7840_port->shadowLCR = Data; | |
1891 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1892 | ||
1893 | } | |
3f542974 PS |
1894 | return status; |
1895 | } | |
1896 | ||
1897 | /***************************************************************************** | |
1898 | * mos7840_change_port_settings | |
1899 | * This routine is called to set the UART on the device to match | |
1900 | * the specified new settings. | |
1901 | *****************************************************************************/ | |
1902 | ||
95da310e AC |
1903 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1904 | struct moschip_port *mos7840_port, struct ktermios *old_termios) | |
3f542974 | 1905 | { |
3f542974 PS |
1906 | int baud; |
1907 | unsigned cflag; | |
1908 | unsigned iflag; | |
1909 | __u8 lData; | |
1910 | __u8 lParity; | |
1911 | __u8 lStop; | |
1912 | int status; | |
1913 | __u16 Data; | |
1914 | struct usb_serial_port *port; | |
1915 | struct usb_serial *serial; | |
1916 | ||
1917 | if (mos7840_port == NULL) | |
1918 | return; | |
1919 | ||
1920 | port = (struct usb_serial_port *)mos7840_port->port; | |
1921 | ||
441b62c1 | 1922 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1923 | dbg("%s", "Invalid port"); |
3f542974 PS |
1924 | return; |
1925 | } | |
1926 | ||
441b62c1 | 1927 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1928 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1929 | return; |
1930 | } | |
1931 | ||
1932 | serial = port->serial; | |
1933 | ||
441b62c1 | 1934 | dbg("%s - port %d", __func__, mos7840_port->port->number); |
3f542974 PS |
1935 | |
1936 | if (!mos7840_port->open) { | |
441b62c1 | 1937 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1938 | return; |
1939 | } | |
1940 | ||
84fe6e79 | 1941 | dbg("%s", "Entering .........."); |
3f542974 PS |
1942 | |
1943 | lData = LCR_BITS_8; | |
1944 | lStop = LCR_STOP_1; | |
1945 | lParity = LCR_PAR_NONE; | |
1946 | ||
1947 | cflag = tty->termios->c_cflag; | |
1948 | iflag = tty->termios->c_iflag; | |
1949 | ||
1950 | /* Change the number of bits */ | |
1951 | if (cflag & CSIZE) { | |
1952 | switch (cflag & CSIZE) { | |
1953 | case CS5: | |
1954 | lData = LCR_BITS_5; | |
1955 | break; | |
1956 | ||
1957 | case CS6: | |
1958 | lData = LCR_BITS_6; | |
1959 | break; | |
1960 | ||
1961 | case CS7: | |
1962 | lData = LCR_BITS_7; | |
1963 | break; | |
1964 | default: | |
1965 | case CS8: | |
1966 | lData = LCR_BITS_8; | |
1967 | break; | |
1968 | } | |
1969 | } | |
1970 | /* Change the Parity bit */ | |
1971 | if (cflag & PARENB) { | |
1972 | if (cflag & PARODD) { | |
1973 | lParity = LCR_PAR_ODD; | |
441b62c1 | 1974 | dbg("%s - parity = odd", __func__); |
3f542974 PS |
1975 | } else { |
1976 | lParity = LCR_PAR_EVEN; | |
441b62c1 | 1977 | dbg("%s - parity = even", __func__); |
3f542974 PS |
1978 | } |
1979 | ||
1980 | } else { | |
441b62c1 | 1981 | dbg("%s - parity = none", __func__); |
3f542974 PS |
1982 | } |
1983 | ||
880af9db | 1984 | if (cflag & CMSPAR) |
3f542974 | 1985 | lParity = lParity | 0x20; |
3f542974 PS |
1986 | |
1987 | /* Change the Stop bit */ | |
1988 | if (cflag & CSTOPB) { | |
1989 | lStop = LCR_STOP_2; | |
441b62c1 | 1990 | dbg("%s - stop bits = 2", __func__); |
3f542974 PS |
1991 | } else { |
1992 | lStop = LCR_STOP_1; | |
441b62c1 | 1993 | dbg("%s - stop bits = 1", __func__); |
3f542974 PS |
1994 | } |
1995 | ||
1996 | /* Update the LCR with the correct value */ | |
1997 | mos7840_port->shadowLCR &= | |
1998 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1999 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
2000 | ||
84fe6e79 | 2001 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", |
3f542974 PS |
2002 | mos7840_port->shadowLCR); |
2003 | /* Disable Interrupts */ | |
2004 | Data = 0x00; | |
2005 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2006 | ||
2007 | Data = 0x00; | |
2008 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2009 | ||
2010 | Data = 0xcf; | |
2011 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2012 | ||
2013 | /* Send the updated LCR value to the mos7840 */ | |
2014 | Data = mos7840_port->shadowLCR; | |
2015 | ||
2016 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
2017 | ||
2018 | Data = 0x00b; | |
2019 | mos7840_port->shadowMCR = Data; | |
2020 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2021 | Data = 0x00b; | |
2022 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2023 | ||
2024 | /* set up the MCR register and send it to the mos7840 */ | |
2025 | ||
2026 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
880af9db | 2027 | if (cflag & CBAUD) |
3f542974 | 2028 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
3f542974 | 2029 | |
880af9db | 2030 | if (cflag & CRTSCTS) |
3f542974 | 2031 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
880af9db | 2032 | else |
3f542974 | 2033 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
3f542974 PS |
2034 | |
2035 | Data = mos7840_port->shadowMCR; | |
2036 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2037 | ||
2038 | /* Determine divisor based on baud rate */ | |
2039 | baud = tty_get_baud_rate(tty); | |
2040 | ||
2041 | if (!baud) { | |
2042 | /* pick a default, any default... */ | |
84fe6e79 | 2043 | dbg("%s", "Picked default baud..."); |
3f542974 PS |
2044 | baud = 9600; |
2045 | } | |
2046 | ||
441b62c1 | 2047 | dbg("%s - baud rate = %d", __func__, baud); |
3f542974 PS |
2048 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
2049 | ||
2050 | /* Enable Interrupts */ | |
2051 | Data = 0x0c; | |
2052 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2053 | ||
50de36f7 | 2054 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2055 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2056 | mos7840_port->read_urb_busy = true; |
3f542974 | 2057 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
3f542974 | 2058 | if (status) { |
50de36f7 | 2059 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2060 | status); |
50de36f7 | 2061 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2062 | } |
2063 | } | |
2064 | wake_up(&mos7840_port->delta_msr_wait); | |
2065 | mos7840_port->delta_msr_cond = 1; | |
84fe6e79 | 2066 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", |
3f542974 PS |
2067 | mos7840_port->shadowLCR); |
2068 | ||
2069 | return; | |
2070 | } | |
2071 | ||
2072 | /***************************************************************************** | |
2073 | * mos7840_set_termios | |
2074 | * this function is called by the tty driver when it wants to change | |
2075 | * the termios structure | |
2076 | *****************************************************************************/ | |
2077 | ||
95da310e AC |
2078 | static void mos7840_set_termios(struct tty_struct *tty, |
2079 | struct usb_serial_port *port, | |
606d099c | 2080 | struct ktermios *old_termios) |
3f542974 PS |
2081 | { |
2082 | int status; | |
2083 | unsigned int cflag; | |
2084 | struct usb_serial *serial; | |
2085 | struct moschip_port *mos7840_port; | |
84fe6e79 | 2086 | dbg("mos7840_set_termios: START"); |
441b62c1 | 2087 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2088 | dbg("%s", "Invalid port"); |
3f542974 PS |
2089 | return; |
2090 | } | |
2091 | ||
2092 | serial = port->serial; | |
2093 | ||
441b62c1 | 2094 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 2095 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
2096 | return; |
2097 | } | |
2098 | ||
2099 | mos7840_port = mos7840_get_port_private(port); | |
2100 | ||
2101 | if (mos7840_port == NULL) | |
2102 | return; | |
2103 | ||
3f542974 | 2104 | if (!mos7840_port->open) { |
441b62c1 | 2105 | dbg("%s - port not opened", __func__); |
3f542974 PS |
2106 | return; |
2107 | } | |
2108 | ||
84fe6e79 | 2109 | dbg("%s", "setting termios - "); |
3f542974 PS |
2110 | |
2111 | cflag = tty->termios->c_cflag; | |
2112 | ||
441b62c1 | 2113 | dbg("%s - clfag %08x iflag %08x", __func__, |
3f542974 | 2114 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); |
441b62c1 | 2115 | dbg("%s - old clfag %08x old iflag %08x", __func__, |
3d3ddce5 | 2116 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); |
441b62c1 | 2117 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
2118 | |
2119 | /* change the port settings to the new ones specified */ | |
2120 | ||
95da310e | 2121 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
3f542974 PS |
2122 | |
2123 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 2124 | dbg("%s", "URB KILLED !!!!!"); |
3f542974 PS |
2125 | return; |
2126 | } | |
2127 | ||
50de36f7 | 2128 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2129 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2130 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
2131 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
2132 | if (status) { | |
50de36f7 | 2133 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2134 | status); |
50de36f7 | 2135 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2136 | } |
2137 | } | |
2138 | return; | |
2139 | } | |
2140 | ||
2141 | /***************************************************************************** | |
2142 | * mos7840_get_lsr_info - get line status register info | |
2143 | * | |
2144 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2145 | * is emptied. On bus types like RS485, the transmitter must | |
2146 | * release the bus after transmitting. This must be done when | |
2147 | * the transmit shift register is empty, not be done when the | |
2148 | * transmit holding register is empty. This functionality | |
2149 | * allows an RS485 driver to be written in user space. | |
2150 | *****************************************************************************/ | |
2151 | ||
95da310e | 2152 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
97c4965d | 2153 | unsigned int __user *value) |
3f542974 PS |
2154 | { |
2155 | int count; | |
2156 | unsigned int result = 0; | |
2157 | ||
95da310e | 2158 | count = mos7840_chars_in_buffer(tty); |
3f542974 | 2159 | if (count == 0) { |
441b62c1 | 2160 | dbg("%s -- Empty", __func__); |
3f542974 PS |
2161 | result = TIOCSER_TEMT; |
2162 | } | |
2163 | ||
2164 | if (copy_to_user(value, &result, sizeof(int))) | |
2165 | return -EFAULT; | |
2166 | return 0; | |
2167 | } | |
2168 | ||
3f542974 PS |
2169 | /***************************************************************************** |
2170 | * mos7840_get_serial_info | |
2171 | * function to get information about serial port | |
2172 | *****************************************************************************/ | |
2173 | ||
2174 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
97c4965d | 2175 | struct serial_struct __user *retinfo) |
3f542974 PS |
2176 | { |
2177 | struct serial_struct tmp; | |
2178 | ||
2179 | if (mos7840_port == NULL) | |
2180 | return -1; | |
2181 | ||
2182 | if (!retinfo) | |
2183 | return -EFAULT; | |
2184 | ||
2185 | memset(&tmp, 0, sizeof(tmp)); | |
2186 | ||
2187 | tmp.type = PORT_16550A; | |
2188 | tmp.line = mos7840_port->port->serial->minor; | |
2189 | tmp.port = mos7840_port->port->number; | |
2190 | tmp.irq = 0; | |
2191 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2192 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2193 | tmp.baud_base = 9600; | |
2194 | tmp.close_delay = 5 * HZ; | |
2195 | tmp.closing_wait = 30 * HZ; | |
2196 | ||
2197 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2198 | return -EFAULT; | |
2199 | return 0; | |
2200 | } | |
2201 | ||
2202 | /***************************************************************************** | |
2203 | * SerialIoctl | |
2204 | * this function handles any ioctl calls to the driver | |
2205 | *****************************************************************************/ | |
2206 | ||
95da310e | 2207 | static int mos7840_ioctl(struct tty_struct *tty, struct file *file, |
3f542974 PS |
2208 | unsigned int cmd, unsigned long arg) |
2209 | { | |
95da310e | 2210 | struct usb_serial_port *port = tty->driver_data; |
97c4965d | 2211 | void __user *argp = (void __user *)arg; |
3f542974 | 2212 | struct moschip_port *mos7840_port; |
3f542974 PS |
2213 | |
2214 | struct async_icount cnow; | |
2215 | struct async_icount cprev; | |
2216 | struct serial_icounter_struct icount; | |
3f542974 | 2217 | |
441b62c1 | 2218 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2219 | dbg("%s", "Invalid port"); |
3f542974 PS |
2220 | return -1; |
2221 | } | |
2222 | ||
2223 | mos7840_port = mos7840_get_port_private(port); | |
3f542974 PS |
2224 | |
2225 | if (mos7840_port == NULL) | |
2226 | return -1; | |
2227 | ||
441b62c1 | 2228 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
3f542974 PS |
2229 | |
2230 | switch (cmd) { | |
2231 | /* return number of bytes available */ | |
2232 | ||
3f542974 | 2233 | case TIOCSERGETLSR: |
441b62c1 | 2234 | dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
95da310e | 2235 | return mos7840_get_lsr_info(tty, argp); |
3f542974 PS |
2236 | return 0; |
2237 | ||
3f542974 | 2238 | case TIOCGSERIAL: |
441b62c1 | 2239 | dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
97c4965d | 2240 | return mos7840_get_serial_info(mos7840_port, argp); |
3f542974 PS |
2241 | |
2242 | case TIOCSSERIAL: | |
441b62c1 | 2243 | dbg("%s (%d) TIOCSSERIAL", __func__, port->number); |
3f542974 PS |
2244 | break; |
2245 | ||
2246 | case TIOCMIWAIT: | |
441b62c1 | 2247 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
3f542974 PS |
2248 | cprev = mos7840_port->icount; |
2249 | while (1) { | |
880af9db | 2250 | /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
3f542974 PS |
2251 | mos7840_port->delta_msr_cond = 0; |
2252 | wait_event_interruptible(mos7840_port->delta_msr_wait, | |
2253 | (mos7840_port-> | |
2254 | delta_msr_cond == 1)); | |
2255 | ||
2256 | /* see if a signal did it */ | |
2257 | if (signal_pending(current)) | |
2258 | return -ERESTARTSYS; | |
2259 | cnow = mos7840_port->icount; | |
0de9a702 | 2260 | smp_rmb(); |
3f542974 PS |
2261 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
2262 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2263 | return -EIO; /* no change => error */ | |
2264 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2265 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2266 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
2267 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
2268 | return 0; | |
2269 | } | |
2270 | cprev = cnow; | |
2271 | } | |
2272 | /* NOTREACHED */ | |
2273 | break; | |
2274 | ||
2275 | case TIOCGICOUNT: | |
2276 | cnow = mos7840_port->icount; | |
0de9a702 | 2277 | smp_rmb(); |
3f542974 PS |
2278 | icount.cts = cnow.cts; |
2279 | icount.dsr = cnow.dsr; | |
2280 | icount.rng = cnow.rng; | |
2281 | icount.dcd = cnow.dcd; | |
2282 | icount.rx = cnow.rx; | |
2283 | icount.tx = cnow.tx; | |
2284 | icount.frame = cnow.frame; | |
2285 | icount.overrun = cnow.overrun; | |
2286 | icount.parity = cnow.parity; | |
2287 | icount.brk = cnow.brk; | |
2288 | icount.buf_overrun = cnow.buf_overrun; | |
2289 | ||
441b62c1 | 2290 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, |
3f542974 | 2291 | port->number, icount.rx, icount.tx); |
97c4965d | 2292 | if (copy_to_user(argp, &icount, sizeof(icount))) |
3f542974 PS |
2293 | return -EFAULT; |
2294 | return 0; | |
3f542974 PS |
2295 | default: |
2296 | break; | |
2297 | } | |
3f542974 PS |
2298 | return -ENOIOCTLCMD; |
2299 | } | |
2300 | ||
2301 | static int mos7840_calc_num_ports(struct usb_serial *serial) | |
2302 | { | |
0de9a702 | 2303 | int mos7840_num_ports = 0; |
3f542974 | 2304 | |
84fe6e79 TC |
2305 | dbg("numberofendpoints: cur %d, alt %d", |
2306 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints, | |
3f542974 PS |
2307 | (int)serial->interface->altsetting->desc.bNumEndpoints); |
2308 | if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { | |
0de9a702 | 2309 | mos7840_num_ports = serial->num_ports = 2; |
3f542974 | 2310 | } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { |
0de9a702 ON |
2311 | serial->num_bulk_in = 4; |
2312 | serial->num_bulk_out = 4; | |
2313 | mos7840_num_ports = serial->num_ports = 4; | |
3f542974 | 2314 | } |
84fe6e79 | 2315 | dbg ("mos7840_num_ports = %d", mos7840_num_ports); |
3f542974 PS |
2316 | return mos7840_num_ports; |
2317 | } | |
2318 | ||
2319 | /**************************************************************************** | |
2320 | * mos7840_startup | |
2321 | ****************************************************************************/ | |
2322 | ||
2323 | static int mos7840_startup(struct usb_serial *serial) | |
2324 | { | |
2325 | struct moschip_port *mos7840_port; | |
2326 | struct usb_device *dev; | |
2327 | int i, status; | |
2328 | ||
2329 | __u16 Data; | |
84fe6e79 | 2330 | dbg("%s", "mos7840_startup :Entering.........."); |
3f542974 PS |
2331 | |
2332 | if (!serial) { | |
84fe6e79 | 2333 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2334 | return -1; |
2335 | } | |
2336 | ||
2337 | dev = serial->dev; | |
2338 | ||
84fe6e79 TC |
2339 | dbg("%s", "Entering..."); |
2340 | dbg ("mos7840_startup: serial = %p", serial); | |
3f542974 PS |
2341 | |
2342 | /* we set up the pointers to the endpoints in the mos7840_open * | |
2343 | * function, as the structures aren't created yet. */ | |
2344 | ||
2345 | /* set up port private structures */ | |
2346 | for (i = 0; i < serial->num_ports; ++i) { | |
84fe6e79 | 2347 | dbg ("mos7840_startup: configuring port %d............", i); |
7ac9da10 | 2348 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); |
3f542974 | 2349 | if (mos7840_port == NULL) { |
194343d9 | 2350 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
0de9a702 ON |
2351 | status = -ENOMEM; |
2352 | i--; /* don't follow NULL pointer cleaning up */ | |
2353 | goto error; | |
3f542974 | 2354 | } |
3f542974 | 2355 | |
880af9db AC |
2356 | /* Initialize all port interrupt end point to port 0 int |
2357 | * endpoint. Our device has only one interrupt end point | |
2358 | * common to all port */ | |
3f542974 PS |
2359 | |
2360 | mos7840_port->port = serial->port[i]; | |
2361 | mos7840_set_port_private(serial->port[i], mos7840_port); | |
0de9a702 | 2362 | spin_lock_init(&mos7840_port->pool_lock); |
3f542974 | 2363 | |
37768adf TC |
2364 | /* minor is not initialised until later by |
2365 | * usb-serial.c:get_free_serial() and cannot therefore be used | |
2366 | * to index device instances */ | |
2367 | mos7840_port->port_num = i + 1; | |
2368 | dbg ("serial->port[i]->number = %d", serial->port[i]->number); | |
2369 | dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); | |
2370 | dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); | |
2371 | dbg ("serial->minor = %d", serial->minor); | |
3f542974 PS |
2372 | |
2373 | if (mos7840_port->port_num == 1) { | |
2374 | mos7840_port->SpRegOffset = 0x0; | |
2375 | mos7840_port->ControlRegOffset = 0x1; | |
2376 | mos7840_port->DcrRegOffset = 0x4; | |
2377 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2378 | && (serial->num_ports == 4)) { |
3f542974 PS |
2379 | mos7840_port->SpRegOffset = 0x8; |
2380 | mos7840_port->ControlRegOffset = 0x9; | |
2381 | mos7840_port->DcrRegOffset = 0x16; | |
2382 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2383 | && (serial->num_ports == 2)) { |
3f542974 PS |
2384 | mos7840_port->SpRegOffset = 0xa; |
2385 | mos7840_port->ControlRegOffset = 0xb; | |
2386 | mos7840_port->DcrRegOffset = 0x19; | |
2387 | } else if ((mos7840_port->port_num == 3) | |
0de9a702 | 2388 | && (serial->num_ports == 4)) { |
3f542974 PS |
2389 | mos7840_port->SpRegOffset = 0xa; |
2390 | mos7840_port->ControlRegOffset = 0xb; | |
2391 | mos7840_port->DcrRegOffset = 0x19; | |
2392 | } else if ((mos7840_port->port_num == 4) | |
0de9a702 | 2393 | && (serial->num_ports == 4)) { |
3f542974 PS |
2394 | mos7840_port->SpRegOffset = 0xc; |
2395 | mos7840_port->ControlRegOffset = 0xd; | |
2396 | mos7840_port->DcrRegOffset = 0x1c; | |
2397 | } | |
2398 | mos7840_dump_serial_port(mos7840_port); | |
3f542974 PS |
2399 | mos7840_set_port_private(serial->port[i], mos7840_port); |
2400 | ||
880af9db AC |
2401 | /* enable rx_disable bit in control register */ |
2402 | status = mos7840_get_reg_sync(serial->port[i], | |
2403 | mos7840_port->ControlRegOffset, &Data); | |
3f542974 | 2404 | if (status < 0) { |
84fe6e79 | 2405 | dbg("Reading ControlReg failed status-0x%x", status); |
3f542974 PS |
2406 | break; |
2407 | } else | |
84fe6e79 | 2408 | dbg("ControlReg Reading success val is %x, status%d", |
3f542974 | 2409 | Data, status); |
880af9db AC |
2410 | Data |= 0x08; /* setting driver done bit */ |
2411 | Data |= 0x04; /* sp1_bit to have cts change reflect in | |
2412 | modem status reg */ | |
3f542974 | 2413 | |
880af9db AC |
2414 | /* Data |= 0x20; //rx_disable bit */ |
2415 | status = mos7840_set_reg_sync(serial->port[i], | |
3f542974 PS |
2416 | mos7840_port->ControlRegOffset, Data); |
2417 | if (status < 0) { | |
84fe6e79 | 2418 | dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); |
3f542974 PS |
2419 | break; |
2420 | } else | |
84fe6e79 | 2421 | dbg("ControlReg Writing success(rx_disable) status%d", |
3f542974 PS |
2422 | status); |
2423 | ||
880af9db AC |
2424 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
2425 | and 0x24 in DCR3 */ | |
3f542974 | 2426 | Data = 0x01; |
880af9db AC |
2427 | status = mos7840_set_reg_sync(serial->port[i], |
2428 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); | |
3f542974 | 2429 | if (status < 0) { |
84fe6e79 | 2430 | dbg("Writing DCR0 failed status-0x%x", status); |
3f542974 PS |
2431 | break; |
2432 | } else | |
84fe6e79 | 2433 | dbg("DCR0 Writing success status%d", status); |
3f542974 PS |
2434 | |
2435 | Data = 0x05; | |
880af9db AC |
2436 | status = mos7840_set_reg_sync(serial->port[i], |
2437 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); | |
3f542974 | 2438 | if (status < 0) { |
84fe6e79 | 2439 | dbg("Writing DCR1 failed status-0x%x", status); |
3f542974 PS |
2440 | break; |
2441 | } else | |
84fe6e79 | 2442 | dbg("DCR1 Writing success status%d", status); |
3f542974 PS |
2443 | |
2444 | Data = 0x24; | |
880af9db AC |
2445 | status = mos7840_set_reg_sync(serial->port[i], |
2446 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); | |
3f542974 | 2447 | if (status < 0) { |
84fe6e79 | 2448 | dbg("Writing DCR2 failed status-0x%x", status); |
3f542974 PS |
2449 | break; |
2450 | } else | |
84fe6e79 | 2451 | dbg("DCR2 Writing success status%d", status); |
3f542974 | 2452 | |
880af9db | 2453 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
3f542974 | 2454 | Data = 0x0; |
880af9db | 2455 | status = mos7840_set_reg_sync(serial->port[i], |
3f542974 PS |
2456 | CLK_START_VALUE_REGISTER, Data); |
2457 | if (status < 0) { | |
84fe6e79 | 2458 | dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); |
3f542974 PS |
2459 | break; |
2460 | } else | |
84fe6e79 | 2461 | dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); |
3f542974 PS |
2462 | |
2463 | Data = 0x20; | |
880af9db AC |
2464 | status = mos7840_set_reg_sync(serial->port[i], |
2465 | CLK_MULTI_REGISTER, Data); | |
3f542974 | 2466 | if (status < 0) { |
84fe6e79 | 2467 | dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", |
3f542974 | 2468 | status); |
0de9a702 | 2469 | goto error; |
3f542974 | 2470 | } else |
84fe6e79 | 2471 | dbg("CLK_MULTI_REGISTER Writing success status%d", |
3f542974 PS |
2472 | status); |
2473 | ||
880af9db | 2474 | /* write value 0x0 to scratchpad register */ |
3f542974 | 2475 | Data = 0x00; |
880af9db AC |
2476 | status = mos7840_set_uart_reg(serial->port[i], |
2477 | SCRATCH_PAD_REGISTER, Data); | |
3f542974 | 2478 | if (status < 0) { |
84fe6e79 | 2479 | dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", |
3f542974 PS |
2480 | status); |
2481 | break; | |
2482 | } else | |
84fe6e79 | 2483 | dbg("SCRATCH_PAD_REGISTER Writing success status%d", |
3f542974 PS |
2484 | status); |
2485 | ||
880af9db | 2486 | /* Zero Length flag register */ |
3f542974 | 2487 | if ((mos7840_port->port_num != 1) |
0de9a702 | 2488 | && (serial->num_ports == 2)) { |
3f542974 PS |
2489 | |
2490 | Data = 0xff; | |
3f542974 | 2491 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2492 | (__u16) (ZLP_REG1 + |
2493 | ((__u16)mos7840_port->port_num)), Data); | |
84fe6e79 | 2494 | dbg("ZLIP offset %x", |
3f542974 | 2495 | (__u16) (ZLP_REG1 + |
880af9db | 2496 | ((__u16) mos7840_port->port_num))); |
3f542974 | 2497 | if (status < 0) { |
84fe6e79 | 2498 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2499 | i + 2, status); |
2500 | break; | |
2501 | } else | |
84fe6e79 | 2502 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2503 | i + 2, status); |
2504 | } else { | |
2505 | Data = 0xff; | |
3f542974 | 2506 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2507 | (__u16) (ZLP_REG1 + |
2508 | ((__u16)mos7840_port->port_num) - 0x1), Data); | |
84fe6e79 | 2509 | dbg("ZLIP offset %x", |
3f542974 PS |
2510 | (__u16) (ZLP_REG1 + |
2511 | ((__u16) mos7840_port->port_num) - 0x1)); | |
2512 | if (status < 0) { | |
84fe6e79 | 2513 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2514 | i + 1, status); |
2515 | break; | |
2516 | } else | |
84fe6e79 | 2517 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2518 | i + 1, status); |
2519 | ||
2520 | } | |
0de9a702 | 2521 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 | 2522 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); |
880af9db AC |
2523 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), |
2524 | GFP_KERNEL); | |
2525 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || | |
2526 | !mos7840_port->dr) { | |
0de9a702 ON |
2527 | status = -ENOMEM; |
2528 | goto error; | |
2529 | } | |
3f542974 | 2530 | } |
84fe6e79 | 2531 | dbg ("mos7840_startup: all ports configured..........."); |
3f542974 | 2532 | |
880af9db | 2533 | /* Zero Length flag enable */ |
3f542974 | 2534 | Data = 0x0f; |
3f542974 PS |
2535 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); |
2536 | if (status < 0) { | |
84fe6e79 | 2537 | dbg("Writing ZLP_REG5 failed status-0x%x", status); |
7ced46c3 | 2538 | goto error; |
3f542974 | 2539 | } else |
84fe6e79 | 2540 | dbg("ZLP_REG5 Writing success status%d", status); |
3f542974 PS |
2541 | |
2542 | /* setting configuration feature to one */ | |
2543 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
97c4965d | 2544 | (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); |
3f542974 | 2545 | return 0; |
0de9a702 ON |
2546 | error: |
2547 | for (/* nothing */; i >= 0; i--) { | |
2548 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2549 | ||
2550 | kfree(mos7840_port->dr); | |
2551 | kfree(mos7840_port->ctrl_buf); | |
2552 | usb_free_urb(mos7840_port->control_urb); | |
2553 | kfree(mos7840_port); | |
2554 | serial->port[i] = NULL; | |
2555 | } | |
2556 | return status; | |
3f542974 PS |
2557 | } |
2558 | ||
2559 | /**************************************************************************** | |
f9c99bb8 | 2560 | * mos7840_disconnect |
3f542974 PS |
2561 | * This function is called whenever the device is removed from the usb bus. |
2562 | ****************************************************************************/ | |
2563 | ||
f9c99bb8 | 2564 | static void mos7840_disconnect(struct usb_serial *serial) |
3f542974 PS |
2565 | { |
2566 | int i; | |
0de9a702 | 2567 | unsigned long flags; |
3f542974 | 2568 | struct moschip_port *mos7840_port; |
f9c99bb8 | 2569 | dbg("%s", " disconnect :entering.........."); |
3f542974 PS |
2570 | |
2571 | if (!serial) { | |
84fe6e79 | 2572 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2573 | return; |
2574 | } | |
2575 | ||
880af9db | 2576 | /* check for the ports to be closed,close the ports and disconnect */ |
3f542974 PS |
2577 | |
2578 | /* free private structure allocated for serial port * | |
2579 | * stop reads and writes on all ports */ | |
2580 | ||
2581 | for (i = 0; i < serial->num_ports; ++i) { | |
2582 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
37768adf TC |
2583 | dbg ("mos7840_port %d = %p", i, mos7840_port); |
2584 | if (mos7840_port) { | |
2585 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); | |
2586 | mos7840_port->zombie = 1; | |
2587 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); | |
2588 | usb_kill_urb(mos7840_port->control_urb); | |
f9c99bb8 AS |
2589 | } |
2590 | } | |
2591 | ||
2592 | dbg("%s", "Thank u :: "); | |
2593 | ||
2594 | } | |
2595 | ||
2596 | /**************************************************************************** | |
2597 | * mos7840_release | |
2598 | * This function is called when the usb_serial structure is freed. | |
2599 | ****************************************************************************/ | |
2600 | ||
2601 | static void mos7840_release(struct usb_serial *serial) | |
2602 | { | |
2603 | int i; | |
2604 | struct moschip_port *mos7840_port; | |
2605 | dbg("%s", " release :entering.........."); | |
2606 | ||
2607 | if (!serial) { | |
2608 | dbg("%s", "Invalid Handler"); | |
2609 | return; | |
2610 | } | |
2611 | ||
2612 | /* check for the ports to be closed,close the ports and disconnect */ | |
2613 | ||
2614 | /* free private structure allocated for serial port * | |
2615 | * stop reads and writes on all ports */ | |
2616 | ||
2617 | for (i = 0; i < serial->num_ports; ++i) { | |
2618 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2619 | dbg("mos7840_port %d = %p", i, mos7840_port); | |
2620 | if (mos7840_port) { | |
37768adf TC |
2621 | kfree(mos7840_port->ctrl_buf); |
2622 | kfree(mos7840_port->dr); | |
2623 | kfree(mos7840_port); | |
2624 | } | |
3f542974 PS |
2625 | } |
2626 | ||
84fe6e79 | 2627 | dbg("%s", "Thank u :: "); |
3f542974 PS |
2628 | |
2629 | } | |
2630 | ||
d9b1b787 JH |
2631 | static struct usb_driver io_driver = { |
2632 | .name = "mos7840", | |
2633 | .probe = usb_serial_probe, | |
2634 | .disconnect = usb_serial_disconnect, | |
2635 | .id_table = moschip_id_table_combined, | |
2636 | .no_dynamic_id = 1, | |
2637 | }; | |
2638 | ||
3f542974 PS |
2639 | static struct usb_serial_driver moschip7840_4port_device = { |
2640 | .driver = { | |
2641 | .owner = THIS_MODULE, | |
2642 | .name = "mos7840", | |
2643 | }, | |
2644 | .description = DRIVER_DESC, | |
d9b1b787 | 2645 | .usb_driver = &io_driver, |
3f542974 | 2646 | .id_table = moschip_port_id_table, |
3f542974 | 2647 | .num_ports = 4, |
3f542974 PS |
2648 | .open = mos7840_open, |
2649 | .close = mos7840_close, | |
2650 | .write = mos7840_write, | |
2651 | .write_room = mos7840_write_room, | |
2652 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2653 | .throttle = mos7840_throttle, | |
2654 | .unthrottle = mos7840_unthrottle, | |
2655 | .calc_num_ports = mos7840_calc_num_ports, | |
2656 | #ifdef MCSSerialProbe | |
2657 | .probe = mos7840_serial_probe, | |
2658 | #endif | |
2659 | .ioctl = mos7840_ioctl, | |
2660 | .set_termios = mos7840_set_termios, | |
2661 | .break_ctl = mos7840_break, | |
2662 | .tiocmget = mos7840_tiocmget, | |
2663 | .tiocmset = mos7840_tiocmset, | |
2664 | .attach = mos7840_startup, | |
f9c99bb8 AS |
2665 | .disconnect = mos7840_disconnect, |
2666 | .release = mos7840_release, | |
3f542974 PS |
2667 | .read_bulk_callback = mos7840_bulk_in_callback, |
2668 | .read_int_callback = mos7840_interrupt_callback, | |
2669 | }; | |
2670 | ||
3f542974 PS |
2671 | /**************************************************************************** |
2672 | * moschip7840_init | |
2673 | * This is called by the module subsystem, or on startup to initialize us | |
2674 | ****************************************************************************/ | |
2675 | static int __init moschip7840_init(void) | |
2676 | { | |
2677 | int retval; | |
2678 | ||
84fe6e79 | 2679 | dbg("%s", " mos7840_init :entering.........."); |
3f542974 PS |
2680 | |
2681 | /* Register with the usb serial */ | |
2682 | retval = usb_serial_register(&moschip7840_4port_device); | |
2683 | ||
2684 | if (retval) | |
2685 | goto failed_port_device_register; | |
2686 | ||
84fe6e79 | 2687 | dbg("%s", "Entering..."); |
c197a8db GKH |
2688 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
2689 | DRIVER_DESC "\n"); | |
3f542974 PS |
2690 | |
2691 | /* Register with the usb */ | |
2692 | retval = usb_register(&io_driver); | |
3f542974 | 2693 | if (retval == 0) { |
84fe6e79 | 2694 | dbg("%s", "Leaving..."); |
3f542974 PS |
2695 | return 0; |
2696 | } | |
3f542974 | 2697 | usb_serial_deregister(&moschip7840_4port_device); |
880af9db | 2698 | failed_port_device_register: |
3f542974 PS |
2699 | return retval; |
2700 | } | |
2701 | ||
2702 | /**************************************************************************** | |
2703 | * moschip7840_exit | |
2704 | * Called when the driver is about to be unloaded. | |
2705 | ****************************************************************************/ | |
2706 | static void __exit moschip7840_exit(void) | |
2707 | { | |
2708 | ||
84fe6e79 | 2709 | dbg("%s", " mos7840_exit :entering.........."); |
3f542974 PS |
2710 | |
2711 | usb_deregister(&io_driver); | |
2712 | ||
2713 | usb_serial_deregister(&moschip7840_4port_device); | |
2714 | ||
84fe6e79 | 2715 | dbg("%s", "Entering..."); |
3f542974 PS |
2716 | } |
2717 | ||
2718 | module_init(moschip7840_init); | |
2719 | module_exit(moschip7840_exit); | |
2720 | ||
2721 | /* Module information */ | |
2722 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2723 | MODULE_LICENSE("GPL"); | |
2724 | ||
2725 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2726 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |