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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> | |
29 | #include <linux/tty.h> | |
30 | #include <linux/tty_driver.h> | |
31 | #include <linux/tty_flip.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/serial.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
880af9db | 36 | #include <linux/uaccess.h> |
3f542974 PS |
37 | |
38 | /* | |
39 | * Version Information | |
40 | */ | |
37768adf | 41 | #define DRIVER_VERSION "1.3.2" |
3f542974 PS |
42 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
43 | ||
44 | /* | |
45 | * 16C50 UART register defines | |
46 | */ | |
47 | ||
48 | #define LCR_BITS_5 0x00 /* 5 bits/char */ | |
49 | #define LCR_BITS_6 0x01 /* 6 bits/char */ | |
50 | #define LCR_BITS_7 0x02 /* 7 bits/char */ | |
51 | #define LCR_BITS_8 0x03 /* 8 bits/char */ | |
52 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
53 | ||
54 | #define LCR_STOP_1 0x00 /* 1 stop bit */ | |
55 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ | |
56 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ | |
57 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
58 | ||
59 | #define LCR_PAR_NONE 0x00 /* No parity */ | |
60 | #define LCR_PAR_ODD 0x08 /* Odd parity */ | |
61 | #define LCR_PAR_EVEN 0x18 /* Even parity */ | |
62 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ | |
63 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ | |
64 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
65 | ||
66 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ | |
67 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ | |
68 | ||
69 | #define MCR_DTR 0x01 /* Assert DTR */ | |
70 | #define MCR_RTS 0x02 /* Assert RTS */ | |
71 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ | |
72 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ | |
73 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ | |
74 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ | |
75 | ||
76 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ | |
77 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ | |
78 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ | |
79 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ | |
80 | ||
81 | /* | |
82 | * Defines used for sending commands to port | |
83 | */ | |
84 | ||
880af9db AC |
85 | #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ |
86 | #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ | |
3f542974 PS |
87 | |
88 | #define MOS_PORT1 0x0200 | |
89 | #define MOS_PORT2 0x0300 | |
90 | #define MOS_VENREG 0x0000 | |
91 | #define MOS_MAX_PORT 0x02 | |
92 | #define MOS_WRITE 0x0E | |
93 | #define MOS_READ 0x0D | |
94 | ||
95 | /* Requests */ | |
96 | #define MCS_RD_RTYPE 0xC0 | |
97 | #define MCS_WR_RTYPE 0x40 | |
98 | #define MCS_RDREQ 0x0D | |
99 | #define MCS_WRREQ 0x0E | |
100 | #define MCS_CTRL_TIMEOUT 500 | |
101 | #define VENDOR_READ_LENGTH (0x01) | |
102 | ||
103 | #define MAX_NAME_LEN 64 | |
104 | ||
880af9db AC |
105 | #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
106 | #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ | |
3f542974 PS |
107 | |
108 | /* For higher baud Rates use TIOCEXBAUD */ | |
109 | #define TIOCEXBAUD 0x5462 | |
110 | ||
111 | /* vendor id and device id defines */ | |
112 | ||
11e1abb4 | 113 | /* The native mos7840/7820 component */ |
3f542974 PS |
114 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
115 | #define MOSCHIP_DEVICE_ID_7840 0x7840 | |
116 | #define MOSCHIP_DEVICE_ID_7820 0x7820 | |
11e1abb4 DL |
117 | /* The native component can have its vendor/device id's overridden |
118 | * in vendor-specific implementations. Such devices can be handled | |
119 | * by making a change here, in moschip_port_id_table, and in | |
120 | * moschip_id_table_combined | |
121 | */ | |
870408c8 DL |
122 | #define USB_VENDOR_ID_BANDB 0x0856 |
123 | #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 | |
124 | #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 | |
125 | #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 | |
126 | #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 | |
127 | #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 | |
128 | #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 | |
129 | #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 | |
130 | #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 | |
131 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 | |
132 | #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 | |
133 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 | |
134 | #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 | |
135 | #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 | |
3f542974 | 136 | |
9d498bea RL |
137 | /* This driver also supports |
138 | * ATEN UC2324 device using Moschip MCS7840 | |
139 | * ATEN UC2322 device using Moschip MCS7820 | |
140 | */ | |
e9b8cffa TC |
141 | #define USB_VENDOR_ID_ATENINTL 0x0557 |
142 | #define ATENINTL_DEVICE_ID_UC2324 0x2011 | |
9d498bea | 143 | #define ATENINTL_DEVICE_ID_UC2322 0x7820 |
e9b8cffa | 144 | |
11e1abb4 | 145 | /* Interrupt Routine Defines */ |
3f542974 PS |
146 | |
147 | #define SERIAL_IIR_RLS 0x06 | |
148 | #define SERIAL_IIR_MS 0x00 | |
149 | ||
150 | /* | |
151 | * Emulation of the bit mask on the LINE STATUS REGISTER. | |
152 | */ | |
153 | #define SERIAL_LSR_DR 0x0001 | |
154 | #define SERIAL_LSR_OE 0x0002 | |
155 | #define SERIAL_LSR_PE 0x0004 | |
156 | #define SERIAL_LSR_FE 0x0008 | |
157 | #define SERIAL_LSR_BI 0x0010 | |
158 | ||
159 | #define MOS_MSR_DELTA_CTS 0x10 | |
160 | #define MOS_MSR_DELTA_DSR 0x20 | |
161 | #define MOS_MSR_DELTA_RI 0x40 | |
162 | #define MOS_MSR_DELTA_CD 0x80 | |
163 | ||
880af9db | 164 | /* Serial Port register Address */ |
3f542974 PS |
165 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
166 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) | |
167 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) | |
168 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) | |
169 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) | |
170 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) | |
171 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) | |
172 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) | |
173 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) | |
174 | ||
175 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) | |
176 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) | |
177 | ||
178 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) | |
179 | ||
180 | /* | |
181 | * URB POOL related defines | |
182 | */ | |
183 | #define NUM_URBS 16 /* URB Count */ | |
184 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
185 | ||
186 | ||
7d40d7e8 | 187 | static const struct usb_device_id moschip_port_id_table[] = { |
3f542974 PS |
188 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
189 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae | 190 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
870408c8 | 191 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, |
acf509ae | 192 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, |
870408c8 | 193 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, |
acf509ae CB |
194 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, |
195 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
196 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
197 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 198 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
870408c8 | 199 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, |
acf509ae | 200 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
870408c8 | 201 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, |
27f1281d | 202 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 203 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 204 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
205 | {} /* terminating entry */ |
206 | }; | |
207 | ||
7d40d7e8 | 208 | static const struct usb_device_id moschip_id_table_combined[] __devinitconst = { |
3f542974 PS |
209 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
210 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
acf509ae | 211 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
870408c8 | 212 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, |
acf509ae | 213 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, |
870408c8 | 214 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, |
acf509ae CB |
215 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, |
216 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
217 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
218 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 219 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
870408c8 | 220 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, |
acf509ae | 221 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
870408c8 | 222 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, |
27f1281d | 223 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 224 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 225 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
226 | {} /* terminating entry */ |
227 | }; | |
228 | ||
229 | MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); | |
230 | ||
231 | /* This structure holds all of the local port information */ | |
232 | ||
233 | struct moschip_port { | |
234 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
235 | struct urb *write_urb; /* write URB for this port */ | |
236 | struct urb *read_urb; /* read URB for this port */ | |
0de9a702 | 237 | struct urb *int_urb; |
3f542974 PS |
238 | __u8 shadowLCR; /* last LCR value received */ |
239 | __u8 shadowMCR; /* last MCR value received */ | |
240 | char open; | |
0de9a702 ON |
241 | char open_ports; |
242 | char zombie; | |
3f542974 PS |
243 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
244 | wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ | |
245 | int delta_msr_cond; | |
246 | struct async_icount icount; | |
247 | struct usb_serial_port *port; /* loop back to the owner of this object */ | |
248 | ||
880af9db | 249 | /* Offsets */ |
3f542974 PS |
250 | __u8 SpRegOffset; |
251 | __u8 ControlRegOffset; | |
252 | __u8 DcrRegOffset; | |
880af9db | 253 | /* for processing control URBS in interrupt context */ |
3f542974 | 254 | struct urb *control_urb; |
0de9a702 | 255 | struct usb_ctrlrequest *dr; |
3f542974 PS |
256 | char *ctrl_buf; |
257 | int MsrLsr; | |
258 | ||
0de9a702 | 259 | spinlock_t pool_lock; |
3f542974 | 260 | struct urb *write_urb_pool[NUM_URBS]; |
0de9a702 | 261 | char busy[NUM_URBS]; |
50de36f7 | 262 | bool read_urb_busy; |
3f542974 PS |
263 | }; |
264 | ||
265 | ||
266 | static int debug; | |
3f542974 PS |
267 | |
268 | /* | |
269 | * mos7840_set_reg_sync | |
270 | * To set the Control register by calling usb_fill_control_urb function | |
271 | * by passing usb_sndctrlpipe function as parameter. | |
272 | */ | |
273 | ||
274 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
275 | __u16 val) | |
276 | { | |
277 | struct usb_device *dev = port->serial->dev; | |
278 | val = val & 0x00ff; | |
84fe6e79 | 279 | dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); |
3f542974 PS |
280 | |
281 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
282 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
283 | MOS_WDR_TIMEOUT); | |
284 | } | |
285 | ||
286 | /* | |
287 | * mos7840_get_reg_sync | |
288 | * To set the Uart register by calling usb_fill_control_urb function by | |
289 | * passing usb_rcvctrlpipe function as parameter. | |
290 | */ | |
291 | ||
292 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
880af9db | 293 | __u16 *val) |
3f542974 PS |
294 | { |
295 | struct usb_device *dev = port->serial->dev; | |
296 | int ret = 0; | |
9e221a35 JH |
297 | u8 *buf; |
298 | ||
299 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
300 | if (!buf) | |
301 | return -ENOMEM; | |
3f542974 PS |
302 | |
303 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 304 | MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 305 | MOS_WDR_TIMEOUT); |
9e221a35 | 306 | *val = buf[0]; |
84fe6e79 | 307 | dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); |
9e221a35 JH |
308 | |
309 | kfree(buf); | |
3f542974 PS |
310 | return ret; |
311 | } | |
312 | ||
313 | /* | |
314 | * mos7840_set_uart_reg | |
315 | * To set the Uart register by calling usb_fill_control_urb function by | |
316 | * passing usb_sndctrlpipe function as parameter. | |
317 | */ | |
318 | ||
319 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
320 | __u16 val) | |
321 | { | |
322 | ||
323 | struct usb_device *dev = port->serial->dev; | |
324 | val = val & 0x00ff; | |
880af9db AC |
325 | /* For the UART control registers, the application number need |
326 | to be Or'ed */ | |
0de9a702 | 327 | if (port->serial->num_ports == 4) { |
880af9db AC |
328 | val |= (((__u16) port->number - |
329 | (__u16) (port->serial->minor)) + 1) << 8; | |
84fe6e79 | 330 | dbg("mos7840_set_uart_reg application number is %x", val); |
3f542974 PS |
331 | } else { |
332 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 333 | val |= (((__u16) port->number - |
3f542974 | 334 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 335 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
336 | val); |
337 | } else { | |
338 | val |= | |
339 | (((__u16) port->number - | |
340 | (__u16) (port->serial->minor)) + 2) << 8; | |
84fe6e79 | 341 | dbg("mos7840_set_uart_reg application number is %x", |
3f542974 PS |
342 | val); |
343 | } | |
344 | } | |
345 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
346 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
347 | MOS_WDR_TIMEOUT); | |
348 | ||
349 | } | |
350 | ||
351 | /* | |
352 | * mos7840_get_uart_reg | |
353 | * To set the Control register by calling usb_fill_control_urb function | |
354 | * by passing usb_rcvctrlpipe function as parameter. | |
355 | */ | |
356 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
880af9db | 357 | __u16 *val) |
3f542974 PS |
358 | { |
359 | struct usb_device *dev = port->serial->dev; | |
360 | int ret = 0; | |
361 | __u16 Wval; | |
9e221a35 JH |
362 | u8 *buf; |
363 | ||
364 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
365 | if (!buf) | |
366 | return -ENOMEM; | |
3f542974 | 367 | |
84fe6e79 | 368 | /* dbg("application number is %4x", |
880af9db AC |
369 | (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ |
370 | /* Wval is same as application number */ | |
0de9a702 | 371 | if (port->serial->num_ports == 4) { |
3f542974 PS |
372 | Wval = |
373 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
374 | 1) << 8; | |
84fe6e79 | 375 | dbg("mos7840_get_uart_reg application number is %x", Wval); |
3f542974 PS |
376 | } else { |
377 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 378 | Wval = (((__u16) port->number - |
3f542974 | 379 | (__u16) (port->serial->minor)) + 1) << 8; |
84fe6e79 | 380 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
381 | Wval); |
382 | } else { | |
880af9db | 383 | Wval = (((__u16) port->number - |
3f542974 | 384 | (__u16) (port->serial->minor)) + 2) << 8; |
84fe6e79 | 385 | dbg("mos7840_get_uart_reg application number is %x", |
3f542974 PS |
386 | Wval); |
387 | } | |
388 | } | |
389 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 390 | MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 391 | MOS_WDR_TIMEOUT); |
9e221a35 JH |
392 | *val = buf[0]; |
393 | ||
394 | kfree(buf); | |
3f542974 PS |
395 | return ret; |
396 | } | |
397 | ||
398 | static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) | |
399 | { | |
400 | ||
84fe6e79 TC |
401 | dbg("***************************************"); |
402 | dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); | |
403 | dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); | |
404 | dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); | |
405 | dbg("***************************************"); | |
3f542974 PS |
406 | |
407 | } | |
408 | ||
409 | /************************************************************************/ | |
410 | /************************************************************************/ | |
411 | /* I N T E R F A C E F U N C T I O N S */ | |
412 | /* I N T E R F A C E F U N C T I O N S */ | |
413 | /************************************************************************/ | |
414 | /************************************************************************/ | |
415 | ||
416 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
417 | struct moschip_port *data) | |
418 | { | |
419 | usb_set_serial_port_data(port, (void *)data); | |
420 | } | |
421 | ||
422 | static inline struct moschip_port *mos7840_get_port_private(struct | |
423 | usb_serial_port | |
424 | *port) | |
425 | { | |
426 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
427 | } | |
428 | ||
0de9a702 | 429 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
3f542974 PS |
430 | { |
431 | struct moschip_port *mos7840_port; | |
432 | struct async_icount *icount; | |
433 | mos7840_port = port; | |
434 | icount = &mos7840_port->icount; | |
435 | if (new_msr & | |
436 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
437 | MOS_MSR_DELTA_CD)) { | |
438 | icount = &mos7840_port->icount; | |
439 | ||
440 | /* update input line counters */ | |
441 | if (new_msr & MOS_MSR_DELTA_CTS) { | |
442 | icount->cts++; | |
0de9a702 | 443 | smp_wmb(); |
3f542974 PS |
444 | } |
445 | if (new_msr & MOS_MSR_DELTA_DSR) { | |
446 | icount->dsr++; | |
0de9a702 | 447 | smp_wmb(); |
3f542974 PS |
448 | } |
449 | if (new_msr & MOS_MSR_DELTA_CD) { | |
450 | icount->dcd++; | |
0de9a702 | 451 | smp_wmb(); |
3f542974 PS |
452 | } |
453 | if (new_msr & MOS_MSR_DELTA_RI) { | |
454 | icount->rng++; | |
0de9a702 | 455 | smp_wmb(); |
3f542974 PS |
456 | } |
457 | } | |
3f542974 PS |
458 | } |
459 | ||
0de9a702 | 460 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
3f542974 PS |
461 | { |
462 | struct async_icount *icount; | |
463 | ||
441b62c1 | 464 | dbg("%s - %02x", __func__, new_lsr); |
3f542974 PS |
465 | |
466 | if (new_lsr & SERIAL_LSR_BI) { | |
880af9db AC |
467 | /* |
468 | * Parity and Framing errors only count if they | |
469 | * occur exclusive of a break being | |
470 | * received. | |
471 | */ | |
3f542974 PS |
472 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
473 | } | |
474 | ||
475 | /* update input line counters */ | |
476 | icount = &port->icount; | |
477 | if (new_lsr & SERIAL_LSR_BI) { | |
478 | icount->brk++; | |
0de9a702 | 479 | smp_wmb(); |
3f542974 PS |
480 | } |
481 | if (new_lsr & SERIAL_LSR_OE) { | |
482 | icount->overrun++; | |
0de9a702 | 483 | smp_wmb(); |
3f542974 PS |
484 | } |
485 | if (new_lsr & SERIAL_LSR_PE) { | |
486 | icount->parity++; | |
0de9a702 | 487 | smp_wmb(); |
3f542974 PS |
488 | } |
489 | if (new_lsr & SERIAL_LSR_FE) { | |
490 | icount->frame++; | |
0de9a702 | 491 | smp_wmb(); |
3f542974 | 492 | } |
3f542974 PS |
493 | } |
494 | ||
495 | /************************************************************************/ | |
496 | /************************************************************************/ | |
497 | /* U S B C A L L B A C K F U N C T I O N S */ | |
498 | /* U S B C A L L B A C K F U N C T I O N S */ | |
499 | /************************************************************************/ | |
500 | /************************************************************************/ | |
501 | ||
7d12e780 | 502 | static void mos7840_control_callback(struct urb *urb) |
3f542974 PS |
503 | { |
504 | unsigned char *data; | |
505 | struct moschip_port *mos7840_port; | |
506 | __u8 regval = 0x0; | |
0de9a702 | 507 | int result = 0; |
0643c724 | 508 | int status = urb->status; |
3f542974 | 509 | |
cdc97792 | 510 | mos7840_port = urb->context; |
0de9a702 | 511 | |
0643c724 | 512 | switch (status) { |
3f542974 PS |
513 | case 0: |
514 | /* success */ | |
515 | break; | |
516 | case -ECONNRESET: | |
517 | case -ENOENT: | |
518 | case -ESHUTDOWN: | |
519 | /* this urb is terminated, clean up */ | |
441b62c1 | 520 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 521 | status); |
3f542974 PS |
522 | return; |
523 | default: | |
441b62c1 | 524 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 525 | status); |
3f542974 PS |
526 | goto exit; |
527 | } | |
528 | ||
84fe6e79 TC |
529 | dbg("%s urb buffer size is %d", __func__, urb->actual_length); |
530 | dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, | |
3f542974 PS |
531 | mos7840_port->MsrLsr, mos7840_port->port_num); |
532 | data = urb->transfer_buffer; | |
533 | regval = (__u8) data[0]; | |
84fe6e79 | 534 | dbg("%s data is %x", __func__, regval); |
3f542974 PS |
535 | if (mos7840_port->MsrLsr == 0) |
536 | mos7840_handle_new_msr(mos7840_port, regval); | |
537 | else if (mos7840_port->MsrLsr == 1) | |
538 | mos7840_handle_new_lsr(mos7840_port, regval); | |
539 | ||
0de9a702 ON |
540 | exit: |
541 | spin_lock(&mos7840_port->pool_lock); | |
542 | if (!mos7840_port->zombie) | |
543 | result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); | |
544 | spin_unlock(&mos7840_port->pool_lock); | |
545 | if (result) { | |
546 | dev_err(&urb->dev->dev, | |
547 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 548 | __func__, result); |
0de9a702 | 549 | } |
3f542974 PS |
550 | } |
551 | ||
552 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
880af9db | 553 | __u16 *val) |
3f542974 PS |
554 | { |
555 | struct usb_device *dev = mcs->port->serial->dev; | |
0de9a702 ON |
556 | struct usb_ctrlrequest *dr = mcs->dr; |
557 | unsigned char *buffer = mcs->ctrl_buf; | |
558 | int ret; | |
3f542974 | 559 | |
3f542974 PS |
560 | dr->bRequestType = MCS_RD_RTYPE; |
561 | dr->bRequest = MCS_RDREQ; | |
880af9db | 562 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
3f542974 PS |
563 | dr->wIndex = cpu_to_le16(reg); |
564 | dr->wLength = cpu_to_le16(2); | |
565 | ||
566 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
567 | (unsigned char *)dr, buffer, 2, | |
568 | mos7840_control_callback, mcs); | |
569 | mcs->control_urb->transfer_buffer_length = 2; | |
570 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | /***************************************************************************** | |
575 | * mos7840_interrupt_callback | |
576 | * this is the callback function for when we have received data on the | |
577 | * interrupt endpoint. | |
578 | *****************************************************************************/ | |
579 | ||
7d12e780 | 580 | static void mos7840_interrupt_callback(struct urb *urb) |
3f542974 PS |
581 | { |
582 | int result; | |
583 | int length; | |
584 | struct moschip_port *mos7840_port; | |
585 | struct usb_serial *serial; | |
586 | __u16 Data; | |
587 | unsigned char *data; | |
588 | __u8 sp[5], st; | |
0de9a702 ON |
589 | int i, rv = 0; |
590 | __u16 wval, wreg = 0; | |
0643c724 | 591 | int status = urb->status; |
3f542974 | 592 | |
84fe6e79 | 593 | dbg("%s", " : Entering"); |
3f542974 | 594 | |
0643c724 | 595 | switch (status) { |
3f542974 PS |
596 | case 0: |
597 | /* success */ | |
598 | break; | |
599 | case -ECONNRESET: | |
600 | case -ENOENT: | |
601 | case -ESHUTDOWN: | |
602 | /* this urb is terminated, clean up */ | |
441b62c1 | 603 | dbg("%s - urb shutting down with status: %d", __func__, |
0643c724 | 604 | status); |
3f542974 PS |
605 | return; |
606 | default: | |
441b62c1 | 607 | dbg("%s - nonzero urb status received: %d", __func__, |
0643c724 | 608 | status); |
3f542974 PS |
609 | goto exit; |
610 | } | |
611 | ||
612 | length = urb->actual_length; | |
613 | data = urb->transfer_buffer; | |
614 | ||
cdc97792 | 615 | serial = urb->context; |
3f542974 PS |
616 | |
617 | /* Moschip get 5 bytes | |
618 | * Byte 1 IIR Port 1 (port.number is 0) | |
619 | * Byte 2 IIR Port 2 (port.number is 1) | |
620 | * Byte 3 IIR Port 3 (port.number is 2) | |
621 | * Byte 4 IIR Port 4 (port.number is 3) | |
622 | * Byte 5 FIFO status for both */ | |
623 | ||
624 | if (length && length > 5) { | |
84fe6e79 | 625 | dbg("%s", "Wrong data !!!"); |
3f542974 PS |
626 | return; |
627 | } | |
628 | ||
629 | sp[0] = (__u8) data[0]; | |
630 | sp[1] = (__u8) data[1]; | |
631 | sp[2] = (__u8) data[2]; | |
632 | sp[3] = (__u8) data[3]; | |
633 | st = (__u8) data[4]; | |
634 | ||
635 | for (i = 0; i < serial->num_ports; i++) { | |
636 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
637 | wval = | |
638 | (((__u16) serial->port[i]->number - | |
639 | (__u16) (serial->minor)) + 1) << 8; | |
640 | if (mos7840_port->open) { | |
641 | if (sp[i] & 0x01) { | |
84fe6e79 | 642 | dbg("SP%d No Interrupt !!!", i); |
3f542974 PS |
643 | } else { |
644 | switch (sp[i] & 0x0f) { | |
645 | case SERIAL_IIR_RLS: | |
646 | dbg("Serial Port %d: Receiver status error or ", i); | |
84fe6e79 | 647 | dbg("address bit detected in 9-bit mode"); |
3f542974 | 648 | mos7840_port->MsrLsr = 1; |
0de9a702 | 649 | wreg = LINE_STATUS_REGISTER; |
3f542974 PS |
650 | break; |
651 | case SERIAL_IIR_MS: | |
84fe6e79 | 652 | dbg("Serial Port %d: Modem status change", i); |
3f542974 | 653 | mos7840_port->MsrLsr = 0; |
0de9a702 | 654 | wreg = MODEM_STATUS_REGISTER; |
3f542974 PS |
655 | break; |
656 | } | |
0de9a702 ON |
657 | spin_lock(&mos7840_port->pool_lock); |
658 | if (!mos7840_port->zombie) { | |
659 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); | |
660 | } else { | |
661 | spin_unlock(&mos7840_port->pool_lock); | |
662 | return; | |
663 | } | |
664 | spin_unlock(&mos7840_port->pool_lock); | |
3f542974 PS |
665 | } |
666 | } | |
667 | } | |
880af9db AC |
668 | if (!(rv < 0)) |
669 | /* the completion handler for the control urb will resubmit */ | |
0de9a702 ON |
670 | return; |
671 | exit: | |
3f542974 PS |
672 | result = usb_submit_urb(urb, GFP_ATOMIC); |
673 | if (result) { | |
674 | dev_err(&urb->dev->dev, | |
675 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 676 | __func__, result); |
3f542974 | 677 | } |
3f542974 PS |
678 | } |
679 | ||
680 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
681 | const char *function) | |
682 | { | |
683 | if (!port) { | |
684 | dbg("%s - port == NULL", function); | |
685 | return -1; | |
686 | } | |
687 | if (!port->serial) { | |
688 | dbg("%s - port->serial == NULL", function); | |
689 | return -1; | |
690 | } | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
696 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
697 | const char *function) | |
698 | { | |
699 | if (!serial) { | |
700 | dbg("%s - serial == NULL", function); | |
701 | return -1; | |
702 | } | |
703 | if (!serial->type) { | |
704 | dbg("%s - serial->type == NULL!", function); | |
705 | return -1; | |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
712 | const char *function) | |
713 | { | |
714 | /* if no port was specified, or it fails a paranoia check */ | |
715 | if (!port || | |
716 | mos7840_port_paranoia_check(port, function) || | |
717 | mos7840_serial_paranoia_check(port->serial, function)) { | |
880af9db AC |
718 | /* then say that we don't have a valid usb_serial thing, |
719 | * which will end up genrating -ENODEV return values */ | |
3f542974 PS |
720 | return NULL; |
721 | } | |
722 | ||
723 | return port->serial; | |
724 | } | |
725 | ||
726 | /***************************************************************************** | |
727 | * mos7840_bulk_in_callback | |
728 | * this is the callback function for when we have received data on the | |
729 | * bulk in endpoint. | |
730 | *****************************************************************************/ | |
731 | ||
7d12e780 | 732 | static void mos7840_bulk_in_callback(struct urb *urb) |
3f542974 | 733 | { |
0643c724 | 734 | int retval; |
3f542974 PS |
735 | unsigned char *data; |
736 | struct usb_serial *serial; | |
737 | struct usb_serial_port *port; | |
738 | struct moschip_port *mos7840_port; | |
739 | struct tty_struct *tty; | |
0643c724 | 740 | int status = urb->status; |
3f542974 | 741 | |
cdc97792 | 742 | mos7840_port = urb->context; |
3f542974 | 743 | if (!mos7840_port) { |
84fe6e79 | 744 | dbg("%s", "NULL mos7840_port pointer"); |
50de36f7 GKH |
745 | return; |
746 | } | |
747 | ||
748 | if (status) { | |
749 | dbg("nonzero read bulk status received: %d", status); | |
750 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
751 | return; |
752 | } | |
753 | ||
754 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 755 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 756 | dbg("%s", "Port Paranoia failed"); |
50de36f7 | 757 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
758 | return; |
759 | } | |
760 | ||
441b62c1 | 761 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 762 | if (!serial) { |
84fe6e79 | 763 | dbg("%s", "Bad serial pointer"); |
50de36f7 | 764 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
765 | return; |
766 | } | |
767 | ||
84fe6e79 | 768 | dbg("%s", "Entering... "); |
3f542974 PS |
769 | |
770 | data = urb->transfer_buffer; | |
771 | ||
84fe6e79 | 772 | dbg("%s", "Entering ..........."); |
3f542974 PS |
773 | |
774 | if (urb->actual_length) { | |
4a90f09b | 775 | tty = tty_port_tty_get(&mos7840_port->port->port); |
3f542974 | 776 | if (tty) { |
3f542974 | 777 | tty_insert_flip_string(tty, data, urb->actual_length); |
84fe6e79 | 778 | dbg(" %s ", data); |
3f542974 | 779 | tty_flip_buffer_push(tty); |
4a90f09b | 780 | tty_kref_put(tty); |
3f542974 PS |
781 | } |
782 | mos7840_port->icount.rx += urb->actual_length; | |
0de9a702 | 783 | smp_wmb(); |
84fe6e79 | 784 | dbg("mos7840_port->icount.rx is %d:", |
3f542974 PS |
785 | mos7840_port->icount.rx); |
786 | } | |
787 | ||
788 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 789 | dbg("%s", "URB KILLED !!!"); |
50de36f7 | 790 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
791 | return; |
792 | } | |
793 | ||
3f542974 | 794 | |
0de9a702 | 795 | mos7840_port->read_urb->dev = serial->dev; |
3f542974 | 796 | |
50de36f7 | 797 | mos7840_port->read_urb_busy = true; |
0643c724 | 798 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
0de9a702 | 799 | |
0643c724 | 800 | if (retval) { |
50de36f7 GKH |
801 | dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); |
802 | mos7840_port->read_urb_busy = false; | |
3f542974 PS |
803 | } |
804 | } | |
805 | ||
806 | /***************************************************************************** | |
807 | * mos7840_bulk_out_data_callback | |
880af9db AC |
808 | * this is the callback function for when we have finished sending |
809 | * serial data on the bulk out endpoint. | |
3f542974 PS |
810 | *****************************************************************************/ |
811 | ||
7d12e780 | 812 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
3f542974 PS |
813 | { |
814 | struct moschip_port *mos7840_port; | |
815 | struct tty_struct *tty; | |
0643c724 | 816 | int status = urb->status; |
0de9a702 ON |
817 | int i; |
818 | ||
cdc97792 | 819 | mos7840_port = urb->context; |
0de9a702 ON |
820 | spin_lock(&mos7840_port->pool_lock); |
821 | for (i = 0; i < NUM_URBS; i++) { | |
822 | if (urb == mos7840_port->write_urb_pool[i]) { | |
823 | mos7840_port->busy[i] = 0; | |
824 | break; | |
825 | } | |
826 | } | |
827 | spin_unlock(&mos7840_port->pool_lock); | |
828 | ||
0643c724 | 829 | if (status) { |
84fe6e79 | 830 | dbg("nonzero write bulk status received:%d", status); |
3f542974 PS |
831 | return; |
832 | } | |
833 | ||
441b62c1 | 834 | if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { |
84fe6e79 | 835 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
836 | return; |
837 | } | |
838 | ||
84fe6e79 | 839 | dbg("%s", "Entering ........."); |
3f542974 | 840 | |
4a90f09b | 841 | tty = tty_port_tty_get(&mos7840_port->port->port); |
b963a844 JS |
842 | if (tty && mos7840_port->open) |
843 | tty_wakeup(tty); | |
4a90f09b | 844 | tty_kref_put(tty); |
3f542974 PS |
845 | |
846 | } | |
847 | ||
848 | /************************************************************************/ | |
849 | /* 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 */ | |
850 | /************************************************************************/ | |
851 | #ifdef MCSSerialProbe | |
852 | static int mos7840_serial_probe(struct usb_serial *serial, | |
853 | const struct usb_device_id *id) | |
854 | { | |
855 | ||
856 | /*need to implement the mode_reg reading and updating\ | |
857 | structures usb_serial_ device_type\ | |
858 | (i.e num_ports, num_bulkin,bulkout etc) */ | |
859 | /* Also we can update the changes attach */ | |
860 | return 1; | |
861 | } | |
862 | #endif | |
863 | ||
864 | /***************************************************************************** | |
865 | * mos7840_open | |
866 | * this function is called by the tty driver when a port is opened | |
867 | * If successful, we return 0 | |
868 | * Otherwise we return a negative error number. | |
869 | *****************************************************************************/ | |
870 | ||
a509a7e4 | 871 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
3f542974 PS |
872 | { |
873 | int response; | |
874 | int j; | |
875 | struct usb_serial *serial; | |
876 | struct urb *urb; | |
877 | __u16 Data; | |
878 | int status; | |
879 | struct moschip_port *mos7840_port; | |
0de9a702 | 880 | struct moschip_port *port0; |
3f542974 | 881 | |
84fe6e79 TC |
882 | dbg ("%s enter", __func__); |
883 | ||
441b62c1 | 884 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 885 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
886 | return -ENODEV; |
887 | } | |
888 | ||
3f542974 PS |
889 | serial = port->serial; |
890 | ||
441b62c1 | 891 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 892 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
893 | return -ENODEV; |
894 | } | |
895 | ||
896 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 897 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 898 | |
0de9a702 | 899 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 PS |
900 | return -ENODEV; |
901 | ||
902 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
903 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
0de9a702 | 904 | port0->open_ports++; |
3f542974 PS |
905 | |
906 | /* Initialising the write urb pool */ | |
907 | for (j = 0; j < NUM_URBS; ++j) { | |
0de9a702 | 908 | urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 PS |
909 | mos7840_port->write_urb_pool[j] = urb; |
910 | ||
911 | if (urb == NULL) { | |
194343d9 | 912 | dev_err(&port->dev, "No more urbs???\n"); |
3f542974 PS |
913 | continue; |
914 | } | |
915 | ||
880af9db AC |
916 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
917 | GFP_KERNEL); | |
3f542974 | 918 | if (!urb->transfer_buffer) { |
0de9a702 ON |
919 | usb_free_urb(urb); |
920 | mos7840_port->write_urb_pool[j] = NULL; | |
194343d9 GKH |
921 | dev_err(&port->dev, |
922 | "%s-out of memory for urb buffers.\n", | |
923 | __func__); | |
3f542974 PS |
924 | continue; |
925 | } | |
926 | } | |
927 | ||
928 | /***************************************************************************** | |
929 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
930 | * | |
931 | * Register Index | |
932 | * 1 : IER | |
933 | * 2 : FCR | |
934 | * 3 : LCR | |
935 | * 4 : MCR | |
936 | * | |
937 | * 0x08 : SP1/2 Control Reg | |
938 | *****************************************************************************/ | |
939 | ||
880af9db | 940 | /* NEED to check the following Block */ |
3f542974 | 941 | |
3f542974 PS |
942 | Data = 0x0; |
943 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
944 | if (status < 0) { | |
84fe6e79 | 945 | dbg("Reading Spreg failed"); |
3f542974 PS |
946 | return -1; |
947 | } | |
948 | Data |= 0x80; | |
949 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
950 | if (status < 0) { | |
84fe6e79 | 951 | dbg("writing Spreg failed"); |
3f542974 PS |
952 | return -1; |
953 | } | |
954 | ||
955 | Data &= ~0x80; | |
956 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
957 | if (status < 0) { | |
84fe6e79 | 958 | dbg("writing Spreg failed"); |
3f542974 PS |
959 | return -1; |
960 | } | |
880af9db | 961 | /* End of block to be checked */ |
3f542974 | 962 | |
3f542974 | 963 | Data = 0x0; |
880af9db AC |
964 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
965 | &Data); | |
3f542974 | 966 | if (status < 0) { |
84fe6e79 | 967 | dbg("Reading Controlreg failed"); |
3f542974 PS |
968 | return -1; |
969 | } | |
880af9db AC |
970 | Data |= 0x08; /* Driver done bit */ |
971 | Data |= 0x20; /* rx_disable */ | |
972 | status = mos7840_set_reg_sync(port, | |
973 | mos7840_port->ControlRegOffset, Data); | |
3f542974 | 974 | if (status < 0) { |
84fe6e79 | 975 | dbg("writing Controlreg failed"); |
3f542974 PS |
976 | return -1; |
977 | } | |
880af9db AC |
978 | /* do register settings here */ |
979 | /* Set all regs to the device default values. */ | |
980 | /*********************************** | |
981 | * First Disable all interrupts. | |
982 | ***********************************/ | |
3f542974 | 983 | Data = 0x00; |
3f542974 PS |
984 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
985 | if (status < 0) { | |
84fe6e79 | 986 | dbg("disabling interrupts failed"); |
3f542974 PS |
987 | return -1; |
988 | } | |
880af9db | 989 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
3f542974 | 990 | Data = 0x00; |
3f542974 PS |
991 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
992 | if (status < 0) { | |
84fe6e79 | 993 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
994 | return -1; |
995 | } | |
996 | ||
997 | Data = 0xcf; | |
3f542974 PS |
998 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
999 | if (status < 0) { | |
84fe6e79 | 1000 | dbg("Writing FIFO_CONTROL_REGISTER failed"); |
3f542974 PS |
1001 | return -1; |
1002 | } | |
1003 | ||
1004 | Data = 0x03; | |
3f542974 PS |
1005 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1006 | mos7840_port->shadowLCR = Data; | |
1007 | ||
1008 | Data = 0x0b; | |
3f542974 PS |
1009 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
1010 | mos7840_port->shadowMCR = Data; | |
1011 | ||
1012 | Data = 0x00; | |
3f542974 PS |
1013 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1014 | mos7840_port->shadowLCR = Data; | |
1015 | ||
880af9db | 1016 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1017 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1018 | ||
1019 | Data = 0x0c; | |
3f542974 PS |
1020 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1021 | ||
1022 | Data = 0x0; | |
3f542974 PS |
1023 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1024 | ||
1025 | Data = 0x00; | |
3f542974 PS |
1026 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1027 | ||
1028 | Data = Data & ~SERIAL_LCR_DLAB; | |
3f542974 PS |
1029 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1030 | mos7840_port->shadowLCR = Data; | |
1031 | ||
880af9db | 1032 | /* clearing Bulkin and Bulkout Fifo */ |
3f542974 | 1033 | Data = 0x0; |
3f542974 PS |
1034 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
1035 | ||
1036 | Data = Data | 0x0c; | |
3f542974 PS |
1037 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
1038 | ||
1039 | Data = Data & ~0x0c; | |
3f542974 | 1040 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
880af9db | 1041 | /* Finally enable all interrupts */ |
3f542974 | 1042 | Data = 0x0c; |
3f542974 PS |
1043 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
1044 | ||
880af9db | 1045 | /* clearing rx_disable */ |
3f542974 | 1046 | Data = 0x0; |
880af9db AC |
1047 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1048 | &Data); | |
3f542974 | 1049 | Data = Data & ~0x20; |
880af9db AC |
1050 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1051 | Data); | |
3f542974 | 1052 | |
880af9db | 1053 | /* rx_negate */ |
3f542974 | 1054 | Data = 0x0; |
880af9db AC |
1055 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1056 | &Data); | |
3f542974 | 1057 | Data = Data | 0x10; |
880af9db AC |
1058 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1059 | Data); | |
3f542974 | 1060 | |
880af9db AC |
1061 | /* Check to see if we've set up our endpoint info yet * |
1062 | * (can't set it up in mos7840_startup as the structures * | |
1063 | * were not set up at that time.) */ | |
0de9a702 | 1064 | if (port0->open_ports == 1) { |
3f542974 | 1065 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
3f542974 | 1066 | /* set up interrupt urb */ |
3f542974 | 1067 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
880af9db AC |
1068 | serial->dev, |
1069 | usb_rcvintpipe(serial->dev, | |
1070 | serial->port[0]->interrupt_in_endpointAddress), | |
1071 | serial->port[0]->interrupt_in_buffer, | |
1072 | serial->port[0]->interrupt_in_urb-> | |
1073 | transfer_buffer_length, | |
1074 | mos7840_interrupt_callback, | |
1075 | serial, | |
1076 | serial->port[0]->interrupt_in_urb->interval); | |
3f542974 PS |
1077 | |
1078 | /* start interrupt read for mos7840 * | |
1079 | * will continue as long as mos7840 is connected */ | |
1080 | ||
1081 | response = | |
1082 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1083 | GFP_KERNEL); | |
1084 | if (response) { | |
194343d9 GKH |
1085 | dev_err(&port->dev, "%s - Error %d submitting " |
1086 | "interrupt urb\n", __func__, response); | |
3f542974 PS |
1087 | } |
1088 | ||
1089 | } | |
1090 | ||
1091 | } | |
1092 | ||
1093 | /* see if we've set up our endpoint info yet * | |
1094 | * (can't set it up in mos7840_startup as the * | |
1095 | * structures were not set up at that time.) */ | |
1096 | ||
84fe6e79 TC |
1097 | dbg("port number is %d", port->number); |
1098 | dbg("serial number is %d", port->serial->minor); | |
1099 | dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); | |
1100 | dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); | |
1101 | dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); | |
1102 | dbg("port's number in the device is %d", mos7840_port->port_num); | |
3f542974 PS |
1103 | mos7840_port->read_urb = port->read_urb; |
1104 | ||
1105 | /* set up our bulk in urb */ | |
1106 | ||
1107 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1108 | serial->dev, | |
1109 | usb_rcvbulkpipe(serial->dev, | |
1110 | port->bulk_in_endpointAddress), | |
1111 | port->bulk_in_buffer, | |
1112 | mos7840_port->read_urb->transfer_buffer_length, | |
1113 | mos7840_bulk_in_callback, mos7840_port); | |
1114 | ||
84fe6e79 | 1115 | dbg("mos7840_open: bulkin endpoint is %d", |
3f542974 | 1116 | port->bulk_in_endpointAddress); |
50de36f7 | 1117 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
1118 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
1119 | if (response) { | |
194343d9 GKH |
1120 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
1121 | __func__, response); | |
50de36f7 | 1122 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1123 | } |
1124 | ||
1125 | /* initialize our wait queues */ | |
1126 | init_waitqueue_head(&mos7840_port->wait_chase); | |
1127 | init_waitqueue_head(&mos7840_port->delta_msr_wait); | |
1128 | ||
1129 | /* initialize our icount structure */ | |
1130 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); | |
1131 | ||
1132 | /* initialize our port settings */ | |
880af9db AC |
1133 | /* Must set to enable ints! */ |
1134 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
3f542974 PS |
1135 | /* send a open port command */ |
1136 | mos7840_port->open = 1; | |
880af9db | 1137 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
3f542974 PS |
1138 | mos7840_port->icount.tx = 0; |
1139 | mos7840_port->icount.rx = 0; | |
1140 | ||
84fe6e79 | 1141 | dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", |
880af9db | 1142 | serial, mos7840_port, port); |
3f542974 | 1143 | |
84fe6e79 TC |
1144 | dbg ("%s leave", __func__); |
1145 | ||
3f542974 PS |
1146 | return 0; |
1147 | ||
1148 | } | |
1149 | ||
1150 | /***************************************************************************** | |
1151 | * mos7840_chars_in_buffer | |
1152 | * this function is called by the tty driver when it wants to know how many | |
1153 | * bytes of data we currently have outstanding in the port (data that has | |
1154 | * been written, but hasn't made it out the port yet) | |
1155 | * If successful, we return the number of bytes left to be written in the | |
1156 | * system, | |
95da310e | 1157 | * Otherwise we return zero. |
3f542974 PS |
1158 | *****************************************************************************/ |
1159 | ||
95da310e | 1160 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
3f542974 | 1161 | { |
95da310e | 1162 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1163 | int i; |
1164 | int chars = 0; | |
0de9a702 | 1165 | unsigned long flags; |
3f542974 PS |
1166 | struct moschip_port *mos7840_port; |
1167 | ||
84fe6e79 | 1168 | dbg("%s", " mos7840_chars_in_buffer:entering ..........."); |
3f542974 | 1169 | |
441b62c1 | 1170 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1171 | dbg("%s", "Invalid port"); |
95da310e | 1172 | return 0; |
3f542974 PS |
1173 | } |
1174 | ||
1175 | mos7840_port = mos7840_get_port_private(port); | |
1176 | if (mos7840_port == NULL) { | |
84fe6e79 | 1177 | dbg("%s", "mos7840_break:leaving ..........."); |
95da310e | 1178 | return 0; |
3f542974 PS |
1179 | } |
1180 | ||
880af9db | 1181 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
95da310e AC |
1182 | for (i = 0; i < NUM_URBS; ++i) |
1183 | if (mos7840_port->busy[i]) | |
3f542974 | 1184 | chars += URB_TRANSFER_BUFFER_SIZE; |
880af9db | 1185 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
441b62c1 | 1186 | dbg("%s - returns %d", __func__, chars); |
0de9a702 | 1187 | return chars; |
3f542974 PS |
1188 | |
1189 | } | |
1190 | ||
3f542974 PS |
1191 | /***************************************************************************** |
1192 | * mos7840_close | |
1193 | * this function is called by the tty driver when a port is closed | |
1194 | *****************************************************************************/ | |
1195 | ||
335f8514 | 1196 | static void mos7840_close(struct usb_serial_port *port) |
3f542974 PS |
1197 | { |
1198 | struct usb_serial *serial; | |
1199 | struct moschip_port *mos7840_port; | |
0de9a702 | 1200 | struct moschip_port *port0; |
3f542974 PS |
1201 | int j; |
1202 | __u16 Data; | |
1203 | ||
84fe6e79 | 1204 | dbg("%s", "mos7840_close:entering..."); |
3f542974 | 1205 | |
441b62c1 | 1206 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1207 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1208 | return; |
1209 | } | |
1210 | ||
441b62c1 | 1211 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1212 | if (!serial) { |
84fe6e79 | 1213 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1214 | return; |
1215 | } | |
1216 | ||
1217 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 1218 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 1219 | |
0de9a702 | 1220 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 | 1221 | return; |
3f542974 PS |
1222 | |
1223 | for (j = 0; j < NUM_URBS; ++j) | |
1224 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1225 | ||
1226 | /* Freeing Write URBs */ | |
1227 | for (j = 0; j < NUM_URBS; ++j) { | |
1228 | if (mos7840_port->write_urb_pool[j]) { | |
1229 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1230 | kfree(mos7840_port->write_urb_pool[j]-> | |
1231 | transfer_buffer); | |
1232 | ||
1233 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1234 | } | |
1235 | } | |
1236 | ||
3f542974 PS |
1237 | /* While closing port, shutdown all bulk read, write * |
1238 | * and interrupt read if they exists */ | |
1239 | if (serial->dev) { | |
3f542974 | 1240 | if (mos7840_port->write_urb) { |
84fe6e79 | 1241 | dbg("%s", "Shutdown bulk write"); |
3f542974 PS |
1242 | usb_kill_urb(mos7840_port->write_urb); |
1243 | } | |
3f542974 | 1244 | if (mos7840_port->read_urb) { |
84fe6e79 | 1245 | dbg("%s", "Shutdown bulk read"); |
3f542974 | 1246 | usb_kill_urb(mos7840_port->read_urb); |
50de36f7 | 1247 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1248 | } |
1249 | if ((&mos7840_port->control_urb)) { | |
84fe6e79 | 1250 | dbg("%s", "Shutdown control read"); |
880af9db | 1251 | /*/ usb_kill_urb (mos7840_port->control_urb); */ |
3f542974 PS |
1252 | } |
1253 | } | |
880af9db AC |
1254 | /* if(mos7840_port->ctrl_buf != NULL) */ |
1255 | /* kfree(mos7840_port->ctrl_buf); */ | |
0de9a702 | 1256 | port0->open_ports--; |
84fe6e79 | 1257 | dbg("mos7840_num_open_ports in close%d:in port%d", |
0de9a702 ON |
1258 | port0->open_ports, port->number); |
1259 | if (port0->open_ports == 0) { | |
3f542974 | 1260 | if (serial->port[0]->interrupt_in_urb) { |
84fe6e79 | 1261 | dbg("%s", "Shutdown interrupt_in_urb"); |
0de9a702 | 1262 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
3f542974 PS |
1263 | } |
1264 | } | |
1265 | ||
1266 | if (mos7840_port->write_urb) { | |
1267 | /* if this urb had a transfer buffer already (old tx) free it */ | |
880af9db | 1268 | if (mos7840_port->write_urb->transfer_buffer != NULL) |
3f542974 | 1269 | kfree(mos7840_port->write_urb->transfer_buffer); |
3f542974 PS |
1270 | usb_free_urb(mos7840_port->write_urb); |
1271 | } | |
1272 | ||
1273 | Data = 0x0; | |
1274 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1275 | ||
1276 | Data = 0x00; | |
1277 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1278 | ||
1279 | mos7840_port->open = 0; | |
1280 | ||
84fe6e79 | 1281 | dbg("%s", "Leaving ............"); |
3f542974 PS |
1282 | } |
1283 | ||
1284 | /************************************************************************ | |
1285 | * | |
1286 | * mos7840_block_until_chase_response | |
1287 | * | |
1288 | * This function will block the close until one of the following: | |
1289 | * 1. Response to our Chase comes from mos7840 | |
dc0d5c1e | 1290 | * 2. A timeout of 10 seconds without activity has expired |
3f542974 PS |
1291 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
1292 | * | |
1293 | ************************************************************************/ | |
1294 | ||
95da310e AC |
1295 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
1296 | struct moschip_port *mos7840_port) | |
3f542974 PS |
1297 | { |
1298 | int timeout = 1 * HZ; | |
1299 | int wait = 10; | |
1300 | int count; | |
1301 | ||
1302 | while (1) { | |
95da310e | 1303 | count = mos7840_chars_in_buffer(tty); |
3f542974 PS |
1304 | |
1305 | /* Check for Buffer status */ | |
880af9db | 1306 | if (count <= 0) |
3f542974 | 1307 | return; |
3f542974 PS |
1308 | |
1309 | /* Block the thread for a while */ | |
1310 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1311 | timeout); | |
1312 | /* No activity.. count down section */ | |
1313 | wait--; | |
1314 | if (wait == 0) { | |
441b62c1 | 1315 | dbg("%s - TIMEOUT", __func__); |
3f542974 PS |
1316 | return; |
1317 | } else { | |
dc0d5c1e | 1318 | /* Reset timeout value back to seconds */ |
3f542974 PS |
1319 | wait = 10; |
1320 | } | |
1321 | } | |
1322 | ||
1323 | } | |
1324 | ||
1325 | /***************************************************************************** | |
1326 | * mos7840_break | |
1327 | * this function sends a break to the port | |
1328 | *****************************************************************************/ | |
95da310e | 1329 | static void mos7840_break(struct tty_struct *tty, int break_state) |
3f542974 | 1330 | { |
95da310e | 1331 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1332 | unsigned char data; |
1333 | struct usb_serial *serial; | |
1334 | struct moschip_port *mos7840_port; | |
1335 | ||
84fe6e79 TC |
1336 | dbg("%s", "Entering ..........."); |
1337 | dbg("mos7840_break: Start"); | |
3f542974 | 1338 | |
441b62c1 | 1339 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1340 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1341 | return; |
1342 | } | |
1343 | ||
441b62c1 | 1344 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 1345 | if (!serial) { |
84fe6e79 | 1346 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1347 | return; |
1348 | } | |
1349 | ||
1350 | mos7840_port = mos7840_get_port_private(port); | |
1351 | ||
880af9db | 1352 | if (mos7840_port == NULL) |
3f542974 | 1353 | return; |
3f542974 | 1354 | |
95da310e | 1355 | if (serial->dev) |
3f542974 | 1356 | /* flush and block until tx is empty */ |
95da310e | 1357 | mos7840_block_until_chase_response(tty, mos7840_port); |
3f542974 | 1358 | |
95da310e | 1359 | if (break_state == -1) |
3f542974 | 1360 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
95da310e | 1361 | else |
3f542974 | 1362 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
3f542974 | 1363 | |
6b447f04 | 1364 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
3f542974 | 1365 | mos7840_port->shadowLCR = data; |
84fe6e79 | 1366 | dbg("mcs7840_break mos7840_port->shadowLCR is %x", |
3f542974 PS |
1367 | mos7840_port->shadowLCR); |
1368 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, | |
1369 | mos7840_port->shadowLCR); | |
3f542974 PS |
1370 | } |
1371 | ||
1372 | /***************************************************************************** | |
1373 | * mos7840_write_room | |
1374 | * this function is called by the tty driver when it wants to know how many | |
1375 | * bytes of data we can accept for a specific port. | |
1376 | * If successful, we return the amount of room that we have for this port | |
1377 | * Otherwise we return a negative error number. | |
1378 | *****************************************************************************/ | |
1379 | ||
95da310e | 1380 | static int mos7840_write_room(struct tty_struct *tty) |
3f542974 | 1381 | { |
95da310e | 1382 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1383 | int i; |
1384 | int room = 0; | |
0de9a702 | 1385 | unsigned long flags; |
3f542974 PS |
1386 | struct moschip_port *mos7840_port; |
1387 | ||
84fe6e79 | 1388 | dbg("%s", " mos7840_write_room:entering ..........."); |
3f542974 | 1389 | |
441b62c1 | 1390 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 TC |
1391 | dbg("%s", "Invalid port"); |
1392 | dbg("%s", " mos7840_write_room:leaving ..........."); | |
3f542974 PS |
1393 | return -1; |
1394 | } | |
1395 | ||
1396 | mos7840_port = mos7840_get_port_private(port); | |
1397 | if (mos7840_port == NULL) { | |
84fe6e79 | 1398 | dbg("%s", "mos7840_break:leaving ..........."); |
3f542974 PS |
1399 | return -1; |
1400 | } | |
1401 | ||
0de9a702 | 1402 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1403 | for (i = 0; i < NUM_URBS; ++i) { |
880af9db | 1404 | if (!mos7840_port->busy[i]) |
3f542974 | 1405 | room += URB_TRANSFER_BUFFER_SIZE; |
3f542974 | 1406 | } |
0de9a702 | 1407 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 | 1408 | |
0de9a702 | 1409 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
441b62c1 | 1410 | dbg("%s - returns %d", __func__, room); |
0de9a702 | 1411 | return room; |
3f542974 PS |
1412 | |
1413 | } | |
1414 | ||
1415 | /***************************************************************************** | |
1416 | * mos7840_write | |
1417 | * this function is called by the tty driver when data should be written to | |
1418 | * the port. | |
1419 | * If successful, we return the number of bytes written, otherwise we | |
1420 | * return a negative error number. | |
1421 | *****************************************************************************/ | |
1422 | ||
95da310e | 1423 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
3f542974 PS |
1424 | const unsigned char *data, int count) |
1425 | { | |
1426 | int status; | |
1427 | int i; | |
1428 | int bytes_sent = 0; | |
1429 | int transfer_size; | |
0de9a702 | 1430 | unsigned long flags; |
3f542974 PS |
1431 | |
1432 | struct moschip_port *mos7840_port; | |
1433 | struct usb_serial *serial; | |
1434 | struct urb *urb; | |
880af9db | 1435 | /* __u16 Data; */ |
3f542974 PS |
1436 | const unsigned char *current_position = data; |
1437 | unsigned char *data1; | |
84fe6e79 TC |
1438 | dbg("%s", "entering ..........."); |
1439 | /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
880af9db | 1440 | mos7840_port->shadowLCR); */ |
3f542974 PS |
1441 | |
1442 | #ifdef NOTMOS7840 | |
1443 | Data = 0x00; | |
3f542974 PS |
1444 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1445 | mos7840_port->shadowLCR = Data; | |
84fe6e79 TC |
1446 | dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); |
1447 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", | |
3f542974 PS |
1448 | mos7840_port->shadowLCR); |
1449 | ||
880af9db AC |
1450 | /* Data = 0x03; */ |
1451 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ | |
1452 | /* mos7840_port->shadowLCR=Data;//Need to add later */ | |
3f542974 | 1453 | |
880af9db | 1454 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1455 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1456 | ||
880af9db AC |
1457 | /* Data = 0x0c; */ |
1458 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ | |
3f542974 | 1459 | Data = 0x00; |
3f542974 | 1460 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
84fe6e79 | 1461 | dbg("mos7840_write:DLL value is %x", Data); |
3f542974 PS |
1462 | |
1463 | Data = 0x0; | |
3f542974 | 1464 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
84fe6e79 | 1465 | dbg("mos7840_write:DLM value is %x", Data); |
3f542974 PS |
1466 | |
1467 | Data = Data & ~SERIAL_LCR_DLAB; | |
84fe6e79 | 1468 | dbg("mos7840_write: mos7840_port->shadowLCR is %x", |
3f542974 | 1469 | mos7840_port->shadowLCR); |
3f542974 PS |
1470 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1471 | #endif | |
1472 | ||
441b62c1 | 1473 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1474 | dbg("%s", "Port Paranoia failed"); |
3f542974 PS |
1475 | return -1; |
1476 | } | |
1477 | ||
1478 | serial = port->serial; | |
441b62c1 | 1479 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 1480 | dbg("%s", "Serial Paranoia failed"); |
3f542974 PS |
1481 | return -1; |
1482 | } | |
1483 | ||
1484 | mos7840_port = mos7840_get_port_private(port); | |
1485 | if (mos7840_port == NULL) { | |
84fe6e79 | 1486 | dbg("%s", "mos7840_port is NULL"); |
3f542974 PS |
1487 | return -1; |
1488 | } | |
1489 | ||
1490 | /* try to find a free urb in the list */ | |
1491 | urb = NULL; | |
1492 | ||
0de9a702 | 1493 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1494 | for (i = 0; i < NUM_URBS; ++i) { |
0de9a702 ON |
1495 | if (!mos7840_port->busy[i]) { |
1496 | mos7840_port->busy[i] = 1; | |
3f542974 | 1497 | urb = mos7840_port->write_urb_pool[i]; |
84fe6e79 | 1498 | dbg("URB:%d", i); |
3f542974 PS |
1499 | break; |
1500 | } | |
1501 | } | |
0de9a702 | 1502 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 PS |
1503 | |
1504 | if (urb == NULL) { | |
441b62c1 | 1505 | dbg("%s - no more free urbs", __func__); |
3f542974 PS |
1506 | goto exit; |
1507 | } | |
1508 | ||
1509 | if (urb->transfer_buffer == NULL) { | |
1510 | urb->transfer_buffer = | |
1511 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
1512 | ||
1513 | if (urb->transfer_buffer == NULL) { | |
194343d9 GKH |
1514 | dev_err(&port->dev, "%s no more kernel memory...\n", |
1515 | __func__); | |
3f542974 PS |
1516 | goto exit; |
1517 | } | |
1518 | } | |
1519 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1520 | ||
97c4965d | 1521 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
3f542974 PS |
1522 | |
1523 | /* fill urb with data and submit */ | |
1524 | usb_fill_bulk_urb(urb, | |
1525 | serial->dev, | |
1526 | usb_sndbulkpipe(serial->dev, | |
1527 | port->bulk_out_endpointAddress), | |
1528 | urb->transfer_buffer, | |
1529 | transfer_size, | |
1530 | mos7840_bulk_out_data_callback, mos7840_port); | |
1531 | ||
1532 | data1 = urb->transfer_buffer; | |
84fe6e79 | 1533 | dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); |
3f542974 PS |
1534 | |
1535 | /* send it down the pipe */ | |
1536 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1537 | ||
1538 | if (status) { | |
0de9a702 | 1539 | mos7840_port->busy[i] = 0; |
194343d9 GKH |
1540 | dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " |
1541 | "with status = %d\n", __func__, status); | |
3f542974 PS |
1542 | bytes_sent = status; |
1543 | goto exit; | |
1544 | } | |
1545 | bytes_sent = transfer_size; | |
1546 | mos7840_port->icount.tx += transfer_size; | |
0de9a702 | 1547 | smp_wmb(); |
84fe6e79 | 1548 | dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); |
95da310e | 1549 | exit: |
3f542974 PS |
1550 | return bytes_sent; |
1551 | ||
1552 | } | |
1553 | ||
1554 | /***************************************************************************** | |
1555 | * mos7840_throttle | |
1556 | * this function is called by the tty driver when it wants to stop the data | |
1557 | * being read from the port. | |
1558 | *****************************************************************************/ | |
1559 | ||
95da310e | 1560 | static void mos7840_throttle(struct tty_struct *tty) |
3f542974 | 1561 | { |
95da310e | 1562 | struct usb_serial_port *port = tty->driver_data; |
3f542974 | 1563 | struct moschip_port *mos7840_port; |
3f542974 PS |
1564 | int status; |
1565 | ||
441b62c1 | 1566 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1567 | dbg("%s", "Invalid port"); |
3f542974 PS |
1568 | return; |
1569 | } | |
1570 | ||
84fe6e79 | 1571 | dbg("- port %d", port->number); |
3f542974 PS |
1572 | |
1573 | mos7840_port = mos7840_get_port_private(port); | |
1574 | ||
1575 | if (mos7840_port == NULL) | |
1576 | return; | |
1577 | ||
1578 | if (!mos7840_port->open) { | |
84fe6e79 | 1579 | dbg("%s", "port not opened"); |
3f542974 PS |
1580 | return; |
1581 | } | |
1582 | ||
84fe6e79 | 1583 | dbg("%s", "Entering .........."); |
3f542974 | 1584 | |
3f542974 PS |
1585 | /* if we are implementing XON/XOFF, send the stop character */ |
1586 | if (I_IXOFF(tty)) { | |
1587 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e AC |
1588 | status = mos7840_write(tty, port, &stop_char, 1); |
1589 | if (status <= 0) | |
3f542974 | 1590 | return; |
3f542974 | 1591 | } |
3f542974 PS |
1592 | /* if we are implementing RTS/CTS, toggle that line */ |
1593 | if (tty->termios->c_cflag & CRTSCTS) { | |
1594 | mos7840_port->shadowMCR &= ~MCR_RTS; | |
95da310e | 1595 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1596 | mos7840_port->shadowMCR); |
95da310e | 1597 | if (status < 0) |
3f542974 | 1598 | return; |
3f542974 | 1599 | } |
3f542974 PS |
1600 | } |
1601 | ||
1602 | /***************************************************************************** | |
1603 | * mos7840_unthrottle | |
880af9db AC |
1604 | * this function is called by the tty driver when it wants to resume |
1605 | * the data being read from the port (called after mos7840_throttle is | |
1606 | * called) | |
3f542974 | 1607 | *****************************************************************************/ |
95da310e | 1608 | static void mos7840_unthrottle(struct tty_struct *tty) |
3f542974 | 1609 | { |
95da310e | 1610 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1611 | int status; |
1612 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1613 | ||
441b62c1 | 1614 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1615 | dbg("%s", "Invalid port"); |
3f542974 PS |
1616 | return; |
1617 | } | |
1618 | ||
1619 | if (mos7840_port == NULL) | |
1620 | return; | |
1621 | ||
1622 | if (!mos7840_port->open) { | |
441b62c1 | 1623 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1624 | return; |
1625 | } | |
1626 | ||
84fe6e79 | 1627 | dbg("%s", "Entering .........."); |
3f542974 | 1628 | |
3f542974 PS |
1629 | /* if we are implementing XON/XOFF, send the start character */ |
1630 | if (I_IXOFF(tty)) { | |
1631 | unsigned char start_char = START_CHAR(tty); | |
95da310e AC |
1632 | status = mos7840_write(tty, port, &start_char, 1); |
1633 | if (status <= 0) | |
3f542974 | 1634 | return; |
3f542974 PS |
1635 | } |
1636 | ||
1637 | /* if we are implementing RTS/CTS, toggle that line */ | |
1638 | if (tty->termios->c_cflag & CRTSCTS) { | |
1639 | mos7840_port->shadowMCR |= MCR_RTS; | |
95da310e | 1640 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1641 | mos7840_port->shadowMCR); |
95da310e | 1642 | if (status < 0) |
3f542974 | 1643 | return; |
3f542974 | 1644 | } |
3f542974 PS |
1645 | } |
1646 | ||
60b33c13 | 1647 | static int mos7840_tiocmget(struct tty_struct *tty) |
3f542974 | 1648 | { |
95da310e | 1649 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1650 | struct moschip_port *mos7840_port; |
1651 | unsigned int result; | |
1652 | __u16 msr; | |
1653 | __u16 mcr; | |
880af9db | 1654 | int status; |
3f542974 PS |
1655 | mos7840_port = mos7840_get_port_private(port); |
1656 | ||
441b62c1 | 1657 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1658 | |
1659 | if (mos7840_port == NULL) | |
1660 | return -ENODEV; | |
1661 | ||
1662 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
1663 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); | |
1664 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | |
1665 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1666 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1667 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1668 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1669 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1670 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1671 | ||
441b62c1 | 1672 | dbg("%s - 0x%04X", __func__, result); |
3f542974 PS |
1673 | |
1674 | return result; | |
1675 | } | |
1676 | ||
95da310e | 1677 | static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, |
3f542974 PS |
1678 | unsigned int set, unsigned int clear) |
1679 | { | |
95da310e | 1680 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1681 | struct moschip_port *mos7840_port; |
1682 | unsigned int mcr; | |
87521c46 | 1683 | int status; |
3f542974 | 1684 | |
441b62c1 | 1685 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
1686 | |
1687 | mos7840_port = mos7840_get_port_private(port); | |
1688 | ||
1689 | if (mos7840_port == NULL) | |
1690 | return -ENODEV; | |
1691 | ||
e2984494 | 1692 | /* FIXME: What locks the port registers ? */ |
3f542974 PS |
1693 | mcr = mos7840_port->shadowMCR; |
1694 | if (clear & TIOCM_RTS) | |
1695 | mcr &= ~MCR_RTS; | |
1696 | if (clear & TIOCM_DTR) | |
1697 | mcr &= ~MCR_DTR; | |
1698 | if (clear & TIOCM_LOOP) | |
1699 | mcr &= ~MCR_LOOPBACK; | |
1700 | ||
1701 | if (set & TIOCM_RTS) | |
1702 | mcr |= MCR_RTS; | |
1703 | if (set & TIOCM_DTR) | |
1704 | mcr |= MCR_DTR; | |
1705 | if (set & TIOCM_LOOP) | |
1706 | mcr |= MCR_LOOPBACK; | |
1707 | ||
1708 | mos7840_port->shadowMCR = mcr; | |
1709 | ||
3f542974 PS |
1710 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
1711 | if (status < 0) { | |
84fe6e79 | 1712 | dbg("setting MODEM_CONTROL_REGISTER Failed"); |
87521c46 | 1713 | return status; |
3f542974 PS |
1714 | } |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | /***************************************************************************** | |
1720 | * mos7840_calc_baud_rate_divisor | |
1721 | * this function calculates the proper baud rate divisor for the specified | |
1722 | * baud rate. | |
1723 | *****************************************************************************/ | |
1724 | static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, | |
880af9db | 1725 | __u16 *clk_sel_val) |
3f542974 PS |
1726 | { |
1727 | ||
441b62c1 | 1728 | dbg("%s - %d", __func__, baudRate); |
3f542974 PS |
1729 | |
1730 | if (baudRate <= 115200) { | |
1731 | *divisor = 115200 / baudRate; | |
1732 | *clk_sel_val = 0x0; | |
1733 | } | |
1734 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1735 | *divisor = 230400 / baudRate; | |
1736 | *clk_sel_val = 0x10; | |
1737 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1738 | *divisor = 403200 / baudRate; | |
1739 | *clk_sel_val = 0x20; | |
1740 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1741 | *divisor = 460800 / baudRate; | |
1742 | *clk_sel_val = 0x30; | |
1743 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1744 | *divisor = 806400 / baudRate; | |
1745 | *clk_sel_val = 0x40; | |
1746 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1747 | *divisor = 921600 / baudRate; | |
1748 | *clk_sel_val = 0x50; | |
1749 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1750 | *divisor = 1572864 / baudRate; | |
1751 | *clk_sel_val = 0x60; | |
1752 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1753 | *divisor = 3145728 / baudRate; | |
1754 | *clk_sel_val = 0x70; | |
1755 | } | |
1756 | return 0; | |
1757 | ||
1758 | #ifdef NOTMCS7840 | |
1759 | ||
1760 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1761 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1762 | *divisor = mos7840_divisor_table[i].Divisor; | |
1763 | return 0; | |
1764 | } | |
1765 | } | |
1766 | ||
1767 | /* After trying for all the standard baud rates * | |
1768 | * Try calculating the divisor for this baud rate */ | |
1769 | ||
1770 | if (baudrate > 75 && baudrate < 230400) { | |
1771 | /* get the divisor */ | |
1772 | custom = (__u16) (230400L / baudrate); | |
1773 | ||
1774 | /* Check for round off */ | |
1775 | round1 = (__u16) (2304000L / baudrate); | |
1776 | round = (__u16) (round1 - (custom * 10)); | |
880af9db | 1777 | if (round > 4) |
3f542974 | 1778 | custom++; |
3f542974 PS |
1779 | *divisor = custom; |
1780 | ||
84fe6e79 | 1781 | dbg(" Baud %d = %d", baudrate, custom); |
3f542974 PS |
1782 | return 0; |
1783 | } | |
1784 | ||
84fe6e79 | 1785 | dbg("%s", " Baud calculation Failed..."); |
3f542974 PS |
1786 | return -1; |
1787 | #endif | |
1788 | } | |
1789 | ||
1790 | /***************************************************************************** | |
1791 | * mos7840_send_cmd_write_baud_rate | |
1792 | * this function sends the proper command to change the baud rate of the | |
1793 | * specified port. | |
1794 | *****************************************************************************/ | |
1795 | ||
1796 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1797 | int baudRate) | |
1798 | { | |
1799 | int divisor = 0; | |
1800 | int status; | |
1801 | __u16 Data; | |
1802 | unsigned char number; | |
1803 | __u16 clk_sel_val; | |
1804 | struct usb_serial_port *port; | |
1805 | ||
1806 | if (mos7840_port == NULL) | |
1807 | return -1; | |
1808 | ||
1809 | port = (struct usb_serial_port *)mos7840_port->port; | |
441b62c1 | 1810 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1811 | dbg("%s", "Invalid port"); |
3f542974 PS |
1812 | return -1; |
1813 | } | |
1814 | ||
441b62c1 | 1815 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1816 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1817 | return -1; |
1818 | } | |
1819 | ||
84fe6e79 | 1820 | dbg("%s", "Entering .........."); |
3f542974 PS |
1821 | |
1822 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; | |
1823 | ||
441b62c1 | 1824 | dbg("%s - port = %d, baud = %d", __func__, |
3f542974 | 1825 | mos7840_port->port->number, baudRate); |
880af9db | 1826 | /* reset clk_uart_sel in spregOffset */ |
3f542974 PS |
1827 | if (baudRate > 115200) { |
1828 | #ifdef HW_flow_control | |
880af9db AC |
1829 | /* NOTE: need to see the pther register to modify */ |
1830 | /* setting h/w flow control bit to 1 */ | |
3f542974 PS |
1831 | Data = 0x2b; |
1832 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1833 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1834 | Data); | |
3f542974 | 1835 | if (status < 0) { |
84fe6e79 | 1836 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1837 | return -1; |
1838 | } | |
1839 | #endif | |
1840 | ||
1841 | } else { | |
1842 | #ifdef HW_flow_control | |
880af9db | 1843 | / *setting h/w flow control bit to 0 */ |
3f542974 PS |
1844 | Data = 0xb; |
1845 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1846 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1847 | Data); | |
3f542974 | 1848 | if (status < 0) { |
84fe6e79 | 1849 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1850 | return -1; |
1851 | } | |
1852 | #endif | |
1853 | ||
1854 | } | |
1855 | ||
880af9db | 1856 | if (1) { /* baudRate <= 115200) */ |
3f542974 PS |
1857 | clk_sel_val = 0x0; |
1858 | Data = 0x0; | |
880af9db | 1859 | status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, |
3f542974 | 1860 | &clk_sel_val); |
880af9db AC |
1861 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
1862 | &Data); | |
3f542974 | 1863 | if (status < 0) { |
84fe6e79 | 1864 | dbg("reading spreg failed in set_serial_baud"); |
3f542974 PS |
1865 | return -1; |
1866 | } | |
1867 | Data = (Data & 0x8f) | clk_sel_val; | |
880af9db AC |
1868 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
1869 | Data); | |
3f542974 | 1870 | if (status < 0) { |
84fe6e79 | 1871 | dbg("Writing spreg failed in set_serial_baud"); |
3f542974 PS |
1872 | return -1; |
1873 | } | |
1874 | /* Calculate the Divisor */ | |
1875 | ||
1876 | if (status) { | |
194343d9 | 1877 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
3f542974 PS |
1878 | return status; |
1879 | } | |
1880 | /* Enable access to divisor latch */ | |
1881 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1882 | mos7840_port->shadowLCR = Data; | |
1883 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1884 | ||
1885 | /* Write the divisor */ | |
1886 | Data = (unsigned char)(divisor & 0xff); | |
84fe6e79 | 1887 | dbg("set_serial_baud Value to write DLL is %x", Data); |
3f542974 PS |
1888 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1889 | ||
1890 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
84fe6e79 | 1891 | dbg("set_serial_baud Value to write DLM is %x", Data); |
3f542974 PS |
1892 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1893 | ||
1894 | /* Disable access to divisor latch */ | |
1895 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1896 | mos7840_port->shadowLCR = Data; | |
1897 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1898 | ||
1899 | } | |
3f542974 PS |
1900 | return status; |
1901 | } | |
1902 | ||
1903 | /***************************************************************************** | |
1904 | * mos7840_change_port_settings | |
1905 | * This routine is called to set the UART on the device to match | |
1906 | * the specified new settings. | |
1907 | *****************************************************************************/ | |
1908 | ||
95da310e AC |
1909 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1910 | struct moschip_port *mos7840_port, struct ktermios *old_termios) | |
3f542974 | 1911 | { |
3f542974 PS |
1912 | int baud; |
1913 | unsigned cflag; | |
1914 | unsigned iflag; | |
1915 | __u8 lData; | |
1916 | __u8 lParity; | |
1917 | __u8 lStop; | |
1918 | int status; | |
1919 | __u16 Data; | |
1920 | struct usb_serial_port *port; | |
1921 | struct usb_serial *serial; | |
1922 | ||
1923 | if (mos7840_port == NULL) | |
1924 | return; | |
1925 | ||
1926 | port = (struct usb_serial_port *)mos7840_port->port; | |
1927 | ||
441b62c1 | 1928 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 1929 | dbg("%s", "Invalid port"); |
3f542974 PS |
1930 | return; |
1931 | } | |
1932 | ||
441b62c1 | 1933 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
84fe6e79 | 1934 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
1935 | return; |
1936 | } | |
1937 | ||
1938 | serial = port->serial; | |
1939 | ||
441b62c1 | 1940 | dbg("%s - port %d", __func__, mos7840_port->port->number); |
3f542974 PS |
1941 | |
1942 | if (!mos7840_port->open) { | |
441b62c1 | 1943 | dbg("%s - port not opened", __func__); |
3f542974 PS |
1944 | return; |
1945 | } | |
1946 | ||
84fe6e79 | 1947 | dbg("%s", "Entering .........."); |
3f542974 PS |
1948 | |
1949 | lData = LCR_BITS_8; | |
1950 | lStop = LCR_STOP_1; | |
1951 | lParity = LCR_PAR_NONE; | |
1952 | ||
1953 | cflag = tty->termios->c_cflag; | |
1954 | iflag = tty->termios->c_iflag; | |
1955 | ||
1956 | /* Change the number of bits */ | |
1957 | if (cflag & CSIZE) { | |
1958 | switch (cflag & CSIZE) { | |
1959 | case CS5: | |
1960 | lData = LCR_BITS_5; | |
1961 | break; | |
1962 | ||
1963 | case CS6: | |
1964 | lData = LCR_BITS_6; | |
1965 | break; | |
1966 | ||
1967 | case CS7: | |
1968 | lData = LCR_BITS_7; | |
1969 | break; | |
1970 | default: | |
1971 | case CS8: | |
1972 | lData = LCR_BITS_8; | |
1973 | break; | |
1974 | } | |
1975 | } | |
1976 | /* Change the Parity bit */ | |
1977 | if (cflag & PARENB) { | |
1978 | if (cflag & PARODD) { | |
1979 | lParity = LCR_PAR_ODD; | |
441b62c1 | 1980 | dbg("%s - parity = odd", __func__); |
3f542974 PS |
1981 | } else { |
1982 | lParity = LCR_PAR_EVEN; | |
441b62c1 | 1983 | dbg("%s - parity = even", __func__); |
3f542974 PS |
1984 | } |
1985 | ||
1986 | } else { | |
441b62c1 | 1987 | dbg("%s - parity = none", __func__); |
3f542974 PS |
1988 | } |
1989 | ||
880af9db | 1990 | if (cflag & CMSPAR) |
3f542974 | 1991 | lParity = lParity | 0x20; |
3f542974 PS |
1992 | |
1993 | /* Change the Stop bit */ | |
1994 | if (cflag & CSTOPB) { | |
1995 | lStop = LCR_STOP_2; | |
441b62c1 | 1996 | dbg("%s - stop bits = 2", __func__); |
3f542974 PS |
1997 | } else { |
1998 | lStop = LCR_STOP_1; | |
441b62c1 | 1999 | dbg("%s - stop bits = 1", __func__); |
3f542974 PS |
2000 | } |
2001 | ||
2002 | /* Update the LCR with the correct value */ | |
2003 | mos7840_port->shadowLCR &= | |
2004 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
2005 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
2006 | ||
84fe6e79 | 2007 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", |
3f542974 PS |
2008 | mos7840_port->shadowLCR); |
2009 | /* Disable Interrupts */ | |
2010 | Data = 0x00; | |
2011 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2012 | ||
2013 | Data = 0x00; | |
2014 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2015 | ||
2016 | Data = 0xcf; | |
2017 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2018 | ||
2019 | /* Send the updated LCR value to the mos7840 */ | |
2020 | Data = mos7840_port->shadowLCR; | |
2021 | ||
2022 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
2023 | ||
2024 | Data = 0x00b; | |
2025 | mos7840_port->shadowMCR = Data; | |
2026 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2027 | Data = 0x00b; | |
2028 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2029 | ||
2030 | /* set up the MCR register and send it to the mos7840 */ | |
2031 | ||
2032 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
880af9db | 2033 | if (cflag & CBAUD) |
3f542974 | 2034 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
3f542974 | 2035 | |
880af9db | 2036 | if (cflag & CRTSCTS) |
3f542974 | 2037 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
880af9db | 2038 | else |
3f542974 | 2039 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
3f542974 PS |
2040 | |
2041 | Data = mos7840_port->shadowMCR; | |
2042 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2043 | ||
2044 | /* Determine divisor based on baud rate */ | |
2045 | baud = tty_get_baud_rate(tty); | |
2046 | ||
2047 | if (!baud) { | |
2048 | /* pick a default, any default... */ | |
84fe6e79 | 2049 | dbg("%s", "Picked default baud..."); |
3f542974 PS |
2050 | baud = 9600; |
2051 | } | |
2052 | ||
441b62c1 | 2053 | dbg("%s - baud rate = %d", __func__, baud); |
3f542974 PS |
2054 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
2055 | ||
2056 | /* Enable Interrupts */ | |
2057 | Data = 0x0c; | |
2058 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2059 | ||
50de36f7 | 2060 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2061 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2062 | mos7840_port->read_urb_busy = true; |
3f542974 | 2063 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
3f542974 | 2064 | if (status) { |
50de36f7 | 2065 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2066 | status); |
50de36f7 | 2067 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2068 | } |
2069 | } | |
2070 | wake_up(&mos7840_port->delta_msr_wait); | |
2071 | mos7840_port->delta_msr_cond = 1; | |
84fe6e79 | 2072 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", |
3f542974 | 2073 | mos7840_port->shadowLCR); |
3f542974 PS |
2074 | } |
2075 | ||
2076 | /***************************************************************************** | |
2077 | * mos7840_set_termios | |
2078 | * this function is called by the tty driver when it wants to change | |
2079 | * the termios structure | |
2080 | *****************************************************************************/ | |
2081 | ||
95da310e AC |
2082 | static void mos7840_set_termios(struct tty_struct *tty, |
2083 | struct usb_serial_port *port, | |
606d099c | 2084 | struct ktermios *old_termios) |
3f542974 PS |
2085 | { |
2086 | int status; | |
2087 | unsigned int cflag; | |
2088 | struct usb_serial *serial; | |
2089 | struct moschip_port *mos7840_port; | |
84fe6e79 | 2090 | dbg("mos7840_set_termios: START"); |
441b62c1 | 2091 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2092 | dbg("%s", "Invalid port"); |
3f542974 PS |
2093 | return; |
2094 | } | |
2095 | ||
2096 | serial = port->serial; | |
2097 | ||
441b62c1 | 2098 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
84fe6e79 | 2099 | dbg("%s", "Invalid Serial"); |
3f542974 PS |
2100 | return; |
2101 | } | |
2102 | ||
2103 | mos7840_port = mos7840_get_port_private(port); | |
2104 | ||
2105 | if (mos7840_port == NULL) | |
2106 | return; | |
2107 | ||
3f542974 | 2108 | if (!mos7840_port->open) { |
441b62c1 | 2109 | dbg("%s - port not opened", __func__); |
3f542974 PS |
2110 | return; |
2111 | } | |
2112 | ||
84fe6e79 | 2113 | dbg("%s", "setting termios - "); |
3f542974 PS |
2114 | |
2115 | cflag = tty->termios->c_cflag; | |
2116 | ||
441b62c1 | 2117 | dbg("%s - clfag %08x iflag %08x", __func__, |
3f542974 | 2118 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); |
441b62c1 | 2119 | dbg("%s - old clfag %08x old iflag %08x", __func__, |
3d3ddce5 | 2120 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); |
441b62c1 | 2121 | dbg("%s - port %d", __func__, port->number); |
3f542974 PS |
2122 | |
2123 | /* change the port settings to the new ones specified */ | |
2124 | ||
95da310e | 2125 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
3f542974 PS |
2126 | |
2127 | if (!mos7840_port->read_urb) { | |
84fe6e79 | 2128 | dbg("%s", "URB KILLED !!!!!"); |
3f542974 PS |
2129 | return; |
2130 | } | |
2131 | ||
50de36f7 | 2132 | if (mos7840_port->read_urb_busy == false) { |
3f542974 | 2133 | mos7840_port->read_urb->dev = serial->dev; |
50de36f7 | 2134 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
2135 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
2136 | if (status) { | |
50de36f7 | 2137 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
3f542974 | 2138 | status); |
50de36f7 | 2139 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2140 | } |
2141 | } | |
3f542974 PS |
2142 | } |
2143 | ||
2144 | /***************************************************************************** | |
2145 | * mos7840_get_lsr_info - get line status register info | |
2146 | * | |
2147 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2148 | * is emptied. On bus types like RS485, the transmitter must | |
2149 | * release the bus after transmitting. This must be done when | |
2150 | * the transmit shift register is empty, not be done when the | |
2151 | * transmit holding register is empty. This functionality | |
2152 | * allows an RS485 driver to be written in user space. | |
2153 | *****************************************************************************/ | |
2154 | ||
95da310e | 2155 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
97c4965d | 2156 | unsigned int __user *value) |
3f542974 PS |
2157 | { |
2158 | int count; | |
2159 | unsigned int result = 0; | |
2160 | ||
95da310e | 2161 | count = mos7840_chars_in_buffer(tty); |
3f542974 | 2162 | if (count == 0) { |
441b62c1 | 2163 | dbg("%s -- Empty", __func__); |
3f542974 PS |
2164 | result = TIOCSER_TEMT; |
2165 | } | |
2166 | ||
2167 | if (copy_to_user(value, &result, sizeof(int))) | |
2168 | return -EFAULT; | |
2169 | return 0; | |
2170 | } | |
2171 | ||
3f542974 PS |
2172 | /***************************************************************************** |
2173 | * mos7840_get_serial_info | |
2174 | * function to get information about serial port | |
2175 | *****************************************************************************/ | |
2176 | ||
2177 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
97c4965d | 2178 | struct serial_struct __user *retinfo) |
3f542974 PS |
2179 | { |
2180 | struct serial_struct tmp; | |
2181 | ||
2182 | if (mos7840_port == NULL) | |
2183 | return -1; | |
2184 | ||
2185 | if (!retinfo) | |
2186 | return -EFAULT; | |
2187 | ||
2188 | memset(&tmp, 0, sizeof(tmp)); | |
2189 | ||
2190 | tmp.type = PORT_16550A; | |
2191 | tmp.line = mos7840_port->port->serial->minor; | |
2192 | tmp.port = mos7840_port->port->number; | |
2193 | tmp.irq = 0; | |
2194 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2195 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2196 | tmp.baud_base = 9600; | |
2197 | tmp.close_delay = 5 * HZ; | |
2198 | tmp.closing_wait = 30 * HZ; | |
2199 | ||
2200 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2201 | return -EFAULT; | |
2202 | return 0; | |
2203 | } | |
2204 | ||
0bca1b91 AC |
2205 | static int mos7840_get_icount(struct tty_struct *tty, |
2206 | struct serial_icounter_struct *icount) | |
2207 | { | |
2208 | struct usb_serial_port *port = tty->driver_data; | |
2209 | struct moschip_port *mos7840_port; | |
2210 | struct async_icount cnow; | |
2211 | ||
2212 | mos7840_port = mos7840_get_port_private(port); | |
2213 | cnow = mos7840_port->icount; | |
2214 | ||
2215 | smp_rmb(); | |
2216 | icount->cts = cnow.cts; | |
2217 | icount->dsr = cnow.dsr; | |
2218 | icount->rng = cnow.rng; | |
2219 | icount->dcd = cnow.dcd; | |
2220 | icount->rx = cnow.rx; | |
2221 | icount->tx = cnow.tx; | |
2222 | icount->frame = cnow.frame; | |
2223 | icount->overrun = cnow.overrun; | |
2224 | icount->parity = cnow.parity; | |
2225 | icount->brk = cnow.brk; | |
2226 | icount->buf_overrun = cnow.buf_overrun; | |
2227 | ||
2228 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, | |
2229 | port->number, icount->rx, icount->tx); | |
2230 | return 0; | |
2231 | } | |
2232 | ||
3f542974 PS |
2233 | /***************************************************************************** |
2234 | * SerialIoctl | |
2235 | * this function handles any ioctl calls to the driver | |
2236 | *****************************************************************************/ | |
2237 | ||
95da310e | 2238 | static int mos7840_ioctl(struct tty_struct *tty, struct file *file, |
3f542974 PS |
2239 | unsigned int cmd, unsigned long arg) |
2240 | { | |
95da310e | 2241 | struct usb_serial_port *port = tty->driver_data; |
97c4965d | 2242 | void __user *argp = (void __user *)arg; |
3f542974 | 2243 | struct moschip_port *mos7840_port; |
3f542974 PS |
2244 | |
2245 | struct async_icount cnow; | |
2246 | struct async_icount cprev; | |
3f542974 | 2247 | |
441b62c1 | 2248 | if (mos7840_port_paranoia_check(port, __func__)) { |
84fe6e79 | 2249 | dbg("%s", "Invalid port"); |
3f542974 PS |
2250 | return -1; |
2251 | } | |
2252 | ||
2253 | mos7840_port = mos7840_get_port_private(port); | |
3f542974 PS |
2254 | |
2255 | if (mos7840_port == NULL) | |
2256 | return -1; | |
2257 | ||
441b62c1 | 2258 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
3f542974 PS |
2259 | |
2260 | switch (cmd) { | |
2261 | /* return number of bytes available */ | |
2262 | ||
3f542974 | 2263 | case TIOCSERGETLSR: |
441b62c1 | 2264 | dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
95da310e | 2265 | return mos7840_get_lsr_info(tty, argp); |
3f542974 PS |
2266 | return 0; |
2267 | ||
3f542974 | 2268 | case TIOCGSERIAL: |
441b62c1 | 2269 | dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
97c4965d | 2270 | return mos7840_get_serial_info(mos7840_port, argp); |
3f542974 PS |
2271 | |
2272 | case TIOCSSERIAL: | |
441b62c1 | 2273 | dbg("%s (%d) TIOCSSERIAL", __func__, port->number); |
3f542974 PS |
2274 | break; |
2275 | ||
2276 | case TIOCMIWAIT: | |
441b62c1 | 2277 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
3f542974 PS |
2278 | cprev = mos7840_port->icount; |
2279 | while (1) { | |
880af9db | 2280 | /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
3f542974 PS |
2281 | mos7840_port->delta_msr_cond = 0; |
2282 | wait_event_interruptible(mos7840_port->delta_msr_wait, | |
2283 | (mos7840_port-> | |
2284 | delta_msr_cond == 1)); | |
2285 | ||
2286 | /* see if a signal did it */ | |
2287 | if (signal_pending(current)) | |
2288 | return -ERESTARTSYS; | |
2289 | cnow = mos7840_port->icount; | |
0de9a702 | 2290 | smp_rmb(); |
3f542974 PS |
2291 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
2292 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2293 | return -EIO; /* no change => error */ | |
2294 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2295 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2296 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
2297 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
2298 | return 0; | |
2299 | } | |
2300 | cprev = cnow; | |
2301 | } | |
2302 | /* NOTREACHED */ | |
2303 | break; | |
2304 | ||
3f542974 PS |
2305 | default: |
2306 | break; | |
2307 | } | |
3f542974 PS |
2308 | return -ENOIOCTLCMD; |
2309 | } | |
2310 | ||
2311 | static int mos7840_calc_num_ports(struct usb_serial *serial) | |
2312 | { | |
0de9a702 | 2313 | int mos7840_num_ports = 0; |
3f542974 | 2314 | |
84fe6e79 TC |
2315 | dbg("numberofendpoints: cur %d, alt %d", |
2316 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints, | |
3f542974 PS |
2317 | (int)serial->interface->altsetting->desc.bNumEndpoints); |
2318 | if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { | |
0de9a702 | 2319 | mos7840_num_ports = serial->num_ports = 2; |
3f542974 | 2320 | } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { |
0de9a702 ON |
2321 | serial->num_bulk_in = 4; |
2322 | serial->num_bulk_out = 4; | |
2323 | mos7840_num_ports = serial->num_ports = 4; | |
3f542974 | 2324 | } |
84fe6e79 | 2325 | dbg ("mos7840_num_ports = %d", mos7840_num_ports); |
3f542974 PS |
2326 | return mos7840_num_ports; |
2327 | } | |
2328 | ||
2329 | /**************************************************************************** | |
2330 | * mos7840_startup | |
2331 | ****************************************************************************/ | |
2332 | ||
2333 | static int mos7840_startup(struct usb_serial *serial) | |
2334 | { | |
2335 | struct moschip_port *mos7840_port; | |
2336 | struct usb_device *dev; | |
2337 | int i, status; | |
2338 | ||
2339 | __u16 Data; | |
84fe6e79 | 2340 | dbg("%s", "mos7840_startup :Entering.........."); |
3f542974 PS |
2341 | |
2342 | if (!serial) { | |
84fe6e79 | 2343 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2344 | return -1; |
2345 | } | |
2346 | ||
2347 | dev = serial->dev; | |
2348 | ||
84fe6e79 TC |
2349 | dbg("%s", "Entering..."); |
2350 | dbg ("mos7840_startup: serial = %p", serial); | |
3f542974 PS |
2351 | |
2352 | /* we set up the pointers to the endpoints in the mos7840_open * | |
2353 | * function, as the structures aren't created yet. */ | |
2354 | ||
2355 | /* set up port private structures */ | |
2356 | for (i = 0; i < serial->num_ports; ++i) { | |
84fe6e79 | 2357 | dbg ("mos7840_startup: configuring port %d............", i); |
7ac9da10 | 2358 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); |
3f542974 | 2359 | if (mos7840_port == NULL) { |
194343d9 | 2360 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
0de9a702 ON |
2361 | status = -ENOMEM; |
2362 | i--; /* don't follow NULL pointer cleaning up */ | |
2363 | goto error; | |
3f542974 | 2364 | } |
3f542974 | 2365 | |
880af9db AC |
2366 | /* Initialize all port interrupt end point to port 0 int |
2367 | * endpoint. Our device has only one interrupt end point | |
2368 | * common to all port */ | |
3f542974 PS |
2369 | |
2370 | mos7840_port->port = serial->port[i]; | |
2371 | mos7840_set_port_private(serial->port[i], mos7840_port); | |
0de9a702 | 2372 | spin_lock_init(&mos7840_port->pool_lock); |
3f542974 | 2373 | |
37768adf TC |
2374 | /* minor is not initialised until later by |
2375 | * usb-serial.c:get_free_serial() and cannot therefore be used | |
2376 | * to index device instances */ | |
2377 | mos7840_port->port_num = i + 1; | |
2378 | dbg ("serial->port[i]->number = %d", serial->port[i]->number); | |
2379 | dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); | |
2380 | dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); | |
2381 | dbg ("serial->minor = %d", serial->minor); | |
3f542974 PS |
2382 | |
2383 | if (mos7840_port->port_num == 1) { | |
2384 | mos7840_port->SpRegOffset = 0x0; | |
2385 | mos7840_port->ControlRegOffset = 0x1; | |
2386 | mos7840_port->DcrRegOffset = 0x4; | |
2387 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2388 | && (serial->num_ports == 4)) { |
3f542974 PS |
2389 | mos7840_port->SpRegOffset = 0x8; |
2390 | mos7840_port->ControlRegOffset = 0x9; | |
2391 | mos7840_port->DcrRegOffset = 0x16; | |
2392 | } else if ((mos7840_port->port_num == 2) | |
0de9a702 | 2393 | && (serial->num_ports == 2)) { |
3f542974 PS |
2394 | mos7840_port->SpRegOffset = 0xa; |
2395 | mos7840_port->ControlRegOffset = 0xb; | |
2396 | mos7840_port->DcrRegOffset = 0x19; | |
2397 | } else if ((mos7840_port->port_num == 3) | |
0de9a702 | 2398 | && (serial->num_ports == 4)) { |
3f542974 PS |
2399 | mos7840_port->SpRegOffset = 0xa; |
2400 | mos7840_port->ControlRegOffset = 0xb; | |
2401 | mos7840_port->DcrRegOffset = 0x19; | |
2402 | } else if ((mos7840_port->port_num == 4) | |
0de9a702 | 2403 | && (serial->num_ports == 4)) { |
3f542974 PS |
2404 | mos7840_port->SpRegOffset = 0xc; |
2405 | mos7840_port->ControlRegOffset = 0xd; | |
2406 | mos7840_port->DcrRegOffset = 0x1c; | |
2407 | } | |
2408 | mos7840_dump_serial_port(mos7840_port); | |
3f542974 PS |
2409 | mos7840_set_port_private(serial->port[i], mos7840_port); |
2410 | ||
880af9db AC |
2411 | /* enable rx_disable bit in control register */ |
2412 | status = mos7840_get_reg_sync(serial->port[i], | |
2413 | mos7840_port->ControlRegOffset, &Data); | |
3f542974 | 2414 | if (status < 0) { |
84fe6e79 | 2415 | dbg("Reading ControlReg failed status-0x%x", status); |
3f542974 PS |
2416 | break; |
2417 | } else | |
84fe6e79 | 2418 | dbg("ControlReg Reading success val is %x, status%d", |
3f542974 | 2419 | Data, status); |
880af9db AC |
2420 | Data |= 0x08; /* setting driver done bit */ |
2421 | Data |= 0x04; /* sp1_bit to have cts change reflect in | |
2422 | modem status reg */ | |
3f542974 | 2423 | |
880af9db AC |
2424 | /* Data |= 0x20; //rx_disable bit */ |
2425 | status = mos7840_set_reg_sync(serial->port[i], | |
3f542974 PS |
2426 | mos7840_port->ControlRegOffset, Data); |
2427 | if (status < 0) { | |
84fe6e79 | 2428 | dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); |
3f542974 PS |
2429 | break; |
2430 | } else | |
84fe6e79 | 2431 | dbg("ControlReg Writing success(rx_disable) status%d", |
3f542974 PS |
2432 | status); |
2433 | ||
880af9db AC |
2434 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
2435 | and 0x24 in DCR3 */ | |
3f542974 | 2436 | Data = 0x01; |
880af9db AC |
2437 | status = mos7840_set_reg_sync(serial->port[i], |
2438 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); | |
3f542974 | 2439 | if (status < 0) { |
84fe6e79 | 2440 | dbg("Writing DCR0 failed status-0x%x", status); |
3f542974 PS |
2441 | break; |
2442 | } else | |
84fe6e79 | 2443 | dbg("DCR0 Writing success status%d", status); |
3f542974 PS |
2444 | |
2445 | Data = 0x05; | |
880af9db AC |
2446 | status = mos7840_set_reg_sync(serial->port[i], |
2447 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); | |
3f542974 | 2448 | if (status < 0) { |
84fe6e79 | 2449 | dbg("Writing DCR1 failed status-0x%x", status); |
3f542974 PS |
2450 | break; |
2451 | } else | |
84fe6e79 | 2452 | dbg("DCR1 Writing success status%d", status); |
3f542974 PS |
2453 | |
2454 | Data = 0x24; | |
880af9db AC |
2455 | status = mos7840_set_reg_sync(serial->port[i], |
2456 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); | |
3f542974 | 2457 | if (status < 0) { |
84fe6e79 | 2458 | dbg("Writing DCR2 failed status-0x%x", status); |
3f542974 PS |
2459 | break; |
2460 | } else | |
84fe6e79 | 2461 | dbg("DCR2 Writing success status%d", status); |
3f542974 | 2462 | |
880af9db | 2463 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
3f542974 | 2464 | Data = 0x0; |
880af9db | 2465 | status = mos7840_set_reg_sync(serial->port[i], |
3f542974 PS |
2466 | CLK_START_VALUE_REGISTER, Data); |
2467 | if (status < 0) { | |
84fe6e79 | 2468 | dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); |
3f542974 PS |
2469 | break; |
2470 | } else | |
84fe6e79 | 2471 | dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); |
3f542974 PS |
2472 | |
2473 | Data = 0x20; | |
880af9db AC |
2474 | status = mos7840_set_reg_sync(serial->port[i], |
2475 | CLK_MULTI_REGISTER, Data); | |
3f542974 | 2476 | if (status < 0) { |
84fe6e79 | 2477 | dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", |
3f542974 | 2478 | status); |
0de9a702 | 2479 | goto error; |
3f542974 | 2480 | } else |
84fe6e79 | 2481 | dbg("CLK_MULTI_REGISTER Writing success status%d", |
3f542974 PS |
2482 | status); |
2483 | ||
880af9db | 2484 | /* write value 0x0 to scratchpad register */ |
3f542974 | 2485 | Data = 0x00; |
880af9db AC |
2486 | status = mos7840_set_uart_reg(serial->port[i], |
2487 | SCRATCH_PAD_REGISTER, Data); | |
3f542974 | 2488 | if (status < 0) { |
84fe6e79 | 2489 | dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", |
3f542974 PS |
2490 | status); |
2491 | break; | |
2492 | } else | |
84fe6e79 | 2493 | dbg("SCRATCH_PAD_REGISTER Writing success status%d", |
3f542974 PS |
2494 | status); |
2495 | ||
880af9db | 2496 | /* Zero Length flag register */ |
3f542974 | 2497 | if ((mos7840_port->port_num != 1) |
0de9a702 | 2498 | && (serial->num_ports == 2)) { |
3f542974 PS |
2499 | |
2500 | Data = 0xff; | |
3f542974 | 2501 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2502 | (__u16) (ZLP_REG1 + |
2503 | ((__u16)mos7840_port->port_num)), Data); | |
84fe6e79 | 2504 | dbg("ZLIP offset %x", |
3f542974 | 2505 | (__u16) (ZLP_REG1 + |
880af9db | 2506 | ((__u16) mos7840_port->port_num))); |
3f542974 | 2507 | if (status < 0) { |
84fe6e79 | 2508 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2509 | i + 2, status); |
2510 | break; | |
2511 | } else | |
84fe6e79 | 2512 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2513 | i + 2, status); |
2514 | } else { | |
2515 | Data = 0xff; | |
3f542974 | 2516 | status = mos7840_set_reg_sync(serial->port[i], |
880af9db AC |
2517 | (__u16) (ZLP_REG1 + |
2518 | ((__u16)mos7840_port->port_num) - 0x1), Data); | |
84fe6e79 | 2519 | dbg("ZLIP offset %x", |
3f542974 PS |
2520 | (__u16) (ZLP_REG1 + |
2521 | ((__u16) mos7840_port->port_num) - 0x1)); | |
2522 | if (status < 0) { | |
84fe6e79 | 2523 | dbg("Writing ZLP_REG%d failed status-0x%x", |
3f542974 PS |
2524 | i + 1, status); |
2525 | break; | |
2526 | } else | |
84fe6e79 | 2527 | dbg("ZLP_REG%d Writing success status%d", |
3f542974 PS |
2528 | i + 1, status); |
2529 | ||
2530 | } | |
0de9a702 | 2531 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 | 2532 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); |
880af9db AC |
2533 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), |
2534 | GFP_KERNEL); | |
2535 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || | |
2536 | !mos7840_port->dr) { | |
0de9a702 ON |
2537 | status = -ENOMEM; |
2538 | goto error; | |
2539 | } | |
3f542974 | 2540 | } |
84fe6e79 | 2541 | dbg ("mos7840_startup: all ports configured..........."); |
3f542974 | 2542 | |
880af9db | 2543 | /* Zero Length flag enable */ |
3f542974 | 2544 | Data = 0x0f; |
3f542974 PS |
2545 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); |
2546 | if (status < 0) { | |
84fe6e79 | 2547 | dbg("Writing ZLP_REG5 failed status-0x%x", status); |
7ced46c3 | 2548 | goto error; |
3f542974 | 2549 | } else |
84fe6e79 | 2550 | dbg("ZLP_REG5 Writing success status%d", status); |
3f542974 PS |
2551 | |
2552 | /* setting configuration feature to one */ | |
2553 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
97c4965d | 2554 | (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); |
3f542974 | 2555 | return 0; |
0de9a702 ON |
2556 | error: |
2557 | for (/* nothing */; i >= 0; i--) { | |
2558 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2559 | ||
2560 | kfree(mos7840_port->dr); | |
2561 | kfree(mos7840_port->ctrl_buf); | |
2562 | usb_free_urb(mos7840_port->control_urb); | |
2563 | kfree(mos7840_port); | |
2564 | serial->port[i] = NULL; | |
2565 | } | |
2566 | return status; | |
3f542974 PS |
2567 | } |
2568 | ||
2569 | /**************************************************************************** | |
f9c99bb8 | 2570 | * mos7840_disconnect |
3f542974 PS |
2571 | * This function is called whenever the device is removed from the usb bus. |
2572 | ****************************************************************************/ | |
2573 | ||
f9c99bb8 | 2574 | static void mos7840_disconnect(struct usb_serial *serial) |
3f542974 PS |
2575 | { |
2576 | int i; | |
0de9a702 | 2577 | unsigned long flags; |
3f542974 | 2578 | struct moschip_port *mos7840_port; |
f9c99bb8 | 2579 | dbg("%s", " disconnect :entering.........."); |
3f542974 PS |
2580 | |
2581 | if (!serial) { | |
84fe6e79 | 2582 | dbg("%s", "Invalid Handler"); |
3f542974 PS |
2583 | return; |
2584 | } | |
2585 | ||
880af9db | 2586 | /* check for the ports to be closed,close the ports and disconnect */ |
3f542974 PS |
2587 | |
2588 | /* free private structure allocated for serial port * | |
2589 | * stop reads and writes on all ports */ | |
2590 | ||
2591 | for (i = 0; i < serial->num_ports; ++i) { | |
2592 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
37768adf TC |
2593 | dbg ("mos7840_port %d = %p", i, mos7840_port); |
2594 | if (mos7840_port) { | |
2595 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); | |
2596 | mos7840_port->zombie = 1; | |
2597 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); | |
2598 | usb_kill_urb(mos7840_port->control_urb); | |
f9c99bb8 AS |
2599 | } |
2600 | } | |
2601 | ||
2602 | dbg("%s", "Thank u :: "); | |
2603 | ||
2604 | } | |
2605 | ||
2606 | /**************************************************************************** | |
2607 | * mos7840_release | |
2608 | * This function is called when the usb_serial structure is freed. | |
2609 | ****************************************************************************/ | |
2610 | ||
2611 | static void mos7840_release(struct usb_serial *serial) | |
2612 | { | |
2613 | int i; | |
2614 | struct moschip_port *mos7840_port; | |
2615 | dbg("%s", " release :entering.........."); | |
2616 | ||
2617 | if (!serial) { | |
2618 | dbg("%s", "Invalid Handler"); | |
2619 | return; | |
2620 | } | |
2621 | ||
2622 | /* check for the ports to be closed,close the ports and disconnect */ | |
2623 | ||
2624 | /* free private structure allocated for serial port * | |
2625 | * stop reads and writes on all ports */ | |
2626 | ||
2627 | for (i = 0; i < serial->num_ports; ++i) { | |
2628 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2629 | dbg("mos7840_port %d = %p", i, mos7840_port); | |
2630 | if (mos7840_port) { | |
37768adf TC |
2631 | kfree(mos7840_port->ctrl_buf); |
2632 | kfree(mos7840_port->dr); | |
2633 | kfree(mos7840_port); | |
2634 | } | |
3f542974 PS |
2635 | } |
2636 | ||
84fe6e79 | 2637 | dbg("%s", "Thank u :: "); |
3f542974 PS |
2638 | |
2639 | } | |
2640 | ||
d9b1b787 JH |
2641 | static struct usb_driver io_driver = { |
2642 | .name = "mos7840", | |
2643 | .probe = usb_serial_probe, | |
2644 | .disconnect = usb_serial_disconnect, | |
2645 | .id_table = moschip_id_table_combined, | |
2646 | .no_dynamic_id = 1, | |
2647 | }; | |
2648 | ||
3f542974 PS |
2649 | static struct usb_serial_driver moschip7840_4port_device = { |
2650 | .driver = { | |
2651 | .owner = THIS_MODULE, | |
2652 | .name = "mos7840", | |
2653 | }, | |
2654 | .description = DRIVER_DESC, | |
d9b1b787 | 2655 | .usb_driver = &io_driver, |
3f542974 | 2656 | .id_table = moschip_port_id_table, |
3f542974 | 2657 | .num_ports = 4, |
3f542974 PS |
2658 | .open = mos7840_open, |
2659 | .close = mos7840_close, | |
2660 | .write = mos7840_write, | |
2661 | .write_room = mos7840_write_room, | |
2662 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2663 | .throttle = mos7840_throttle, | |
2664 | .unthrottle = mos7840_unthrottle, | |
2665 | .calc_num_ports = mos7840_calc_num_ports, | |
2666 | #ifdef MCSSerialProbe | |
2667 | .probe = mos7840_serial_probe, | |
2668 | #endif | |
2669 | .ioctl = mos7840_ioctl, | |
2670 | .set_termios = mos7840_set_termios, | |
2671 | .break_ctl = mos7840_break, | |
2672 | .tiocmget = mos7840_tiocmget, | |
2673 | .tiocmset = mos7840_tiocmset, | |
0bca1b91 | 2674 | .get_icount = mos7840_get_icount, |
3f542974 | 2675 | .attach = mos7840_startup, |
f9c99bb8 AS |
2676 | .disconnect = mos7840_disconnect, |
2677 | .release = mos7840_release, | |
3f542974 PS |
2678 | .read_bulk_callback = mos7840_bulk_in_callback, |
2679 | .read_int_callback = mos7840_interrupt_callback, | |
2680 | }; | |
2681 | ||
3f542974 PS |
2682 | /**************************************************************************** |
2683 | * moschip7840_init | |
2684 | * This is called by the module subsystem, or on startup to initialize us | |
2685 | ****************************************************************************/ | |
2686 | static int __init moschip7840_init(void) | |
2687 | { | |
2688 | int retval; | |
2689 | ||
84fe6e79 | 2690 | dbg("%s", " mos7840_init :entering.........."); |
3f542974 PS |
2691 | |
2692 | /* Register with the usb serial */ | |
2693 | retval = usb_serial_register(&moschip7840_4port_device); | |
2694 | ||
2695 | if (retval) | |
2696 | goto failed_port_device_register; | |
2697 | ||
84fe6e79 | 2698 | dbg("%s", "Entering..."); |
c197a8db GKH |
2699 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
2700 | DRIVER_DESC "\n"); | |
3f542974 PS |
2701 | |
2702 | /* Register with the usb */ | |
2703 | retval = usb_register(&io_driver); | |
3f542974 | 2704 | if (retval == 0) { |
84fe6e79 | 2705 | dbg("%s", "Leaving..."); |
3f542974 PS |
2706 | return 0; |
2707 | } | |
3f542974 | 2708 | usb_serial_deregister(&moschip7840_4port_device); |
880af9db | 2709 | failed_port_device_register: |
3f542974 PS |
2710 | return retval; |
2711 | } | |
2712 | ||
2713 | /**************************************************************************** | |
2714 | * moschip7840_exit | |
2715 | * Called when the driver is about to be unloaded. | |
2716 | ****************************************************************************/ | |
2717 | static void __exit moschip7840_exit(void) | |
2718 | { | |
2719 | ||
84fe6e79 | 2720 | dbg("%s", " mos7840_exit :entering.........."); |
3f542974 PS |
2721 | |
2722 | usb_deregister(&io_driver); | |
2723 | ||
2724 | usb_serial_deregister(&moschip7840_4port_device); | |
2725 | ||
84fe6e79 | 2726 | dbg("%s", "Entering..."); |
3f542974 PS |
2727 | } |
2728 | ||
2729 | module_init(moschip7840_init); | |
2730 | module_exit(moschip7840_exit); | |
2731 | ||
2732 | /* Module information */ | |
2733 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2734 | MODULE_LICENSE("GPL"); | |
2735 | ||
2736 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2737 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |