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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 | 37 | |
3f542974 PS |
38 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
39 | ||
40 | /* | |
41 | * 16C50 UART register defines | |
42 | */ | |
43 | ||
44 | #define LCR_BITS_5 0x00 /* 5 bits/char */ | |
45 | #define LCR_BITS_6 0x01 /* 6 bits/char */ | |
46 | #define LCR_BITS_7 0x02 /* 7 bits/char */ | |
47 | #define LCR_BITS_8 0x03 /* 8 bits/char */ | |
48 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
49 | ||
50 | #define LCR_STOP_1 0x00 /* 1 stop bit */ | |
51 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ | |
52 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ | |
53 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
54 | ||
55 | #define LCR_PAR_NONE 0x00 /* No parity */ | |
56 | #define LCR_PAR_ODD 0x08 /* Odd parity */ | |
57 | #define LCR_PAR_EVEN 0x18 /* Even parity */ | |
58 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ | |
59 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ | |
60 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
61 | ||
62 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ | |
63 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ | |
64 | ||
65 | #define MCR_DTR 0x01 /* Assert DTR */ | |
66 | #define MCR_RTS 0x02 /* Assert RTS */ | |
67 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ | |
68 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ | |
69 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ | |
70 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ | |
71 | ||
72 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ | |
73 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ | |
74 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ | |
75 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ | |
76 | ||
77 | /* | |
78 | * Defines used for sending commands to port | |
79 | */ | |
80 | ||
1e658489 | 81 | #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ |
3f542974 PS |
82 | |
83 | #define MOS_PORT1 0x0200 | |
84 | #define MOS_PORT2 0x0300 | |
85 | #define MOS_VENREG 0x0000 | |
86 | #define MOS_MAX_PORT 0x02 | |
87 | #define MOS_WRITE 0x0E | |
88 | #define MOS_READ 0x0D | |
89 | ||
90 | /* Requests */ | |
91 | #define MCS_RD_RTYPE 0xC0 | |
92 | #define MCS_WR_RTYPE 0x40 | |
93 | #define MCS_RDREQ 0x0D | |
94 | #define MCS_WRREQ 0x0E | |
95 | #define MCS_CTRL_TIMEOUT 500 | |
96 | #define VENDOR_READ_LENGTH (0x01) | |
97 | ||
98 | #define MAX_NAME_LEN 64 | |
99 | ||
880af9db AC |
100 | #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
101 | #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ | |
3f542974 PS |
102 | |
103 | /* For higher baud Rates use TIOCEXBAUD */ | |
104 | #define TIOCEXBAUD 0x5462 | |
105 | ||
106 | /* vendor id and device id defines */ | |
107 | ||
11e1abb4 | 108 | /* The native mos7840/7820 component */ |
3f542974 PS |
109 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
110 | #define MOSCHIP_DEVICE_ID_7840 0x7840 | |
111 | #define MOSCHIP_DEVICE_ID_7820 0x7820 | |
0eafe4de | 112 | #define MOSCHIP_DEVICE_ID_7810 0x7810 |
11e1abb4 DL |
113 | /* The native component can have its vendor/device id's overridden |
114 | * in vendor-specific implementations. Such devices can be handled | |
68e24113 | 115 | * by making a change here, in id_table. |
11e1abb4 | 116 | */ |
870408c8 DL |
117 | #define USB_VENDOR_ID_BANDB 0x0856 |
118 | #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 | |
119 | #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 | |
120 | #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 | |
121 | #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 | |
122 | #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 | |
123 | #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 | |
124 | #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 | |
125 | #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 | |
126 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 | |
127 | #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 | |
128 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 | |
129 | #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 | |
130 | #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 | |
3f542974 | 131 | |
9d498bea RL |
132 | /* This driver also supports |
133 | * ATEN UC2324 device using Moschip MCS7840 | |
134 | * ATEN UC2322 device using Moschip MCS7820 | |
135 | */ | |
e9b8cffa TC |
136 | #define USB_VENDOR_ID_ATENINTL 0x0557 |
137 | #define ATENINTL_DEVICE_ID_UC2324 0x2011 | |
9d498bea | 138 | #define ATENINTL_DEVICE_ID_UC2322 0x7820 |
e9b8cffa | 139 | |
11e1abb4 | 140 | /* Interrupt Routine Defines */ |
3f542974 PS |
141 | |
142 | #define SERIAL_IIR_RLS 0x06 | |
143 | #define SERIAL_IIR_MS 0x00 | |
144 | ||
145 | /* | |
146 | * Emulation of the bit mask on the LINE STATUS REGISTER. | |
147 | */ | |
148 | #define SERIAL_LSR_DR 0x0001 | |
149 | #define SERIAL_LSR_OE 0x0002 | |
150 | #define SERIAL_LSR_PE 0x0004 | |
151 | #define SERIAL_LSR_FE 0x0008 | |
152 | #define SERIAL_LSR_BI 0x0010 | |
153 | ||
154 | #define MOS_MSR_DELTA_CTS 0x10 | |
155 | #define MOS_MSR_DELTA_DSR 0x20 | |
156 | #define MOS_MSR_DELTA_RI 0x40 | |
157 | #define MOS_MSR_DELTA_CD 0x80 | |
158 | ||
880af9db | 159 | /* Serial Port register Address */ |
3f542974 PS |
160 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
161 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) | |
162 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) | |
163 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) | |
164 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) | |
165 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) | |
166 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) | |
167 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) | |
168 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) | |
169 | ||
170 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) | |
171 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) | |
093ea2d3 | 172 | #define GPIO_REGISTER ((__u16)(0x07)) |
3f542974 PS |
173 | |
174 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) | |
175 | ||
176 | /* | |
177 | * URB POOL related defines | |
178 | */ | |
179 | #define NUM_URBS 16 /* URB Count */ | |
180 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
181 | ||
0eafe4de D |
182 | /* LED on/off milliseconds*/ |
183 | #define LED_ON_MS 500 | |
184 | #define LED_OFF_MS 500 | |
185 | ||
186 | static int device_type; | |
3f542974 | 187 | |
b9c87663 | 188 | static const struct usb_device_id id_table[] = { |
3f542974 PS |
189 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
190 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
0eafe4de | 191 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, |
acf509ae | 192 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
870408c8 | 193 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, |
acf509ae | 194 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, |
870408c8 | 195 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, |
acf509ae CB |
196 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, |
197 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
198 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
199 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 200 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
870408c8 | 201 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, |
acf509ae | 202 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
870408c8 | 203 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, |
27f1281d | 204 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 205 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 206 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
207 | {} /* terminating entry */ |
208 | }; | |
68e24113 | 209 | MODULE_DEVICE_TABLE(usb, id_table); |
3f542974 PS |
210 | |
211 | /* This structure holds all of the local port information */ | |
212 | ||
213 | struct moschip_port { | |
214 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
215 | struct urb *write_urb; /* write URB for this port */ | |
216 | struct urb *read_urb; /* read URB for this port */ | |
217 | __u8 shadowLCR; /* last LCR value received */ | |
218 | __u8 shadowMCR; /* last MCR value received */ | |
219 | char open; | |
0de9a702 | 220 | char open_ports; |
3f542974 | 221 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
3f542974 PS |
222 | int delta_msr_cond; |
223 | struct async_icount icount; | |
224 | struct usb_serial_port *port; /* loop back to the owner of this object */ | |
225 | ||
880af9db | 226 | /* Offsets */ |
3f542974 PS |
227 | __u8 SpRegOffset; |
228 | __u8 ControlRegOffset; | |
229 | __u8 DcrRegOffset; | |
880af9db | 230 | /* for processing control URBS in interrupt context */ |
3f542974 | 231 | struct urb *control_urb; |
0de9a702 | 232 | struct usb_ctrlrequest *dr; |
3f542974 PS |
233 | char *ctrl_buf; |
234 | int MsrLsr; | |
235 | ||
0de9a702 | 236 | spinlock_t pool_lock; |
3f542974 | 237 | struct urb *write_urb_pool[NUM_URBS]; |
0de9a702 | 238 | char busy[NUM_URBS]; |
50de36f7 | 239 | bool read_urb_busy; |
3f542974 | 240 | |
0eafe4de D |
241 | /* For device(s) with LED indicator */ |
242 | bool has_led; | |
243 | bool led_flag; | |
244 | struct timer_list led_timer1; /* Timer for LED on */ | |
245 | struct timer_list led_timer2; /* Timer for LED off */ | |
246 | }; | |
3f542974 | 247 | |
3f542974 PS |
248 | /* |
249 | * mos7840_set_reg_sync | |
250 | * To set the Control register by calling usb_fill_control_urb function | |
251 | * by passing usb_sndctrlpipe function as parameter. | |
252 | */ | |
253 | ||
254 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
255 | __u16 val) | |
256 | { | |
257 | struct usb_device *dev = port->serial->dev; | |
258 | val = val & 0x00ff; | |
9c134a14 | 259 | dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); |
3f542974 PS |
260 | |
261 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
262 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
263 | MOS_WDR_TIMEOUT); | |
264 | } | |
265 | ||
266 | /* | |
267 | * mos7840_get_reg_sync | |
268 | * To set the Uart register by calling usb_fill_control_urb function by | |
269 | * passing usb_rcvctrlpipe function as parameter. | |
270 | */ | |
271 | ||
272 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
880af9db | 273 | __u16 *val) |
3f542974 PS |
274 | { |
275 | struct usb_device *dev = port->serial->dev; | |
276 | int ret = 0; | |
9e221a35 JH |
277 | u8 *buf; |
278 | ||
279 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
280 | if (!buf) | |
281 | return -ENOMEM; | |
3f542974 PS |
282 | |
283 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 284 | MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 285 | MOS_WDR_TIMEOUT); |
9e221a35 | 286 | *val = buf[0]; |
9c134a14 | 287 | dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); |
9e221a35 JH |
288 | |
289 | kfree(buf); | |
3f542974 PS |
290 | return ret; |
291 | } | |
292 | ||
293 | /* | |
294 | * mos7840_set_uart_reg | |
295 | * To set the Uart register by calling usb_fill_control_urb function by | |
296 | * passing usb_sndctrlpipe function as parameter. | |
297 | */ | |
298 | ||
299 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
300 | __u16 val) | |
301 | { | |
302 | ||
303 | struct usb_device *dev = port->serial->dev; | |
304 | val = val & 0x00ff; | |
880af9db AC |
305 | /* For the UART control registers, the application number need |
306 | to be Or'ed */ | |
0de9a702 | 307 | if (port->serial->num_ports == 4) { |
880af9db AC |
308 | val |= (((__u16) port->number - |
309 | (__u16) (port->serial->minor)) + 1) << 8; | |
3f542974 PS |
310 | } else { |
311 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 312 | val |= (((__u16) port->number - |
3f542974 | 313 | (__u16) (port->serial->minor)) + 1) << 8; |
3f542974 | 314 | } else { |
9c134a14 | 315 | val |= (((__u16) port->number - |
3f542974 | 316 | (__u16) (port->serial->minor)) + 2) << 8; |
3f542974 PS |
317 | } |
318 | } | |
9c134a14 | 319 | dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); |
3f542974 PS |
320 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
321 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
322 | MOS_WDR_TIMEOUT); | |
323 | ||
324 | } | |
325 | ||
326 | /* | |
327 | * mos7840_get_uart_reg | |
328 | * To set the Control register by calling usb_fill_control_urb function | |
329 | * by passing usb_rcvctrlpipe function as parameter. | |
330 | */ | |
331 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
880af9db | 332 | __u16 *val) |
3f542974 PS |
333 | { |
334 | struct usb_device *dev = port->serial->dev; | |
335 | int ret = 0; | |
336 | __u16 Wval; | |
9e221a35 JH |
337 | u8 *buf; |
338 | ||
339 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
340 | if (!buf) | |
341 | return -ENOMEM; | |
3f542974 | 342 | |
880af9db | 343 | /* Wval is same as application number */ |
0de9a702 | 344 | if (port->serial->num_ports == 4) { |
3f542974 PS |
345 | Wval = |
346 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
347 | 1) << 8; | |
3f542974 PS |
348 | } else { |
349 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 350 | Wval = (((__u16) port->number - |
3f542974 | 351 | (__u16) (port->serial->minor)) + 1) << 8; |
3f542974 | 352 | } else { |
880af9db | 353 | Wval = (((__u16) port->number - |
3f542974 | 354 | (__u16) (port->serial->minor)) + 2) << 8; |
3f542974 PS |
355 | } |
356 | } | |
9c134a14 | 357 | dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); |
3f542974 | 358 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
9e221a35 | 359 | MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 360 | MOS_WDR_TIMEOUT); |
9e221a35 JH |
361 | *val = buf[0]; |
362 | ||
363 | kfree(buf); | |
3f542974 PS |
364 | return ret; |
365 | } | |
366 | ||
9c134a14 GKH |
367 | static void mos7840_dump_serial_port(struct usb_serial_port *port, |
368 | struct moschip_port *mos7840_port) | |
3f542974 PS |
369 | { |
370 | ||
9c134a14 GKH |
371 | dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); |
372 | dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); | |
373 | dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); | |
3f542974 PS |
374 | |
375 | } | |
376 | ||
377 | /************************************************************************/ | |
378 | /************************************************************************/ | |
379 | /* I N T E R F A C E F U N C T I O N S */ | |
380 | /* I N T E R F A C E F U N C T I O N S */ | |
381 | /************************************************************************/ | |
382 | /************************************************************************/ | |
383 | ||
384 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
385 | struct moschip_port *data) | |
386 | { | |
387 | usb_set_serial_port_data(port, (void *)data); | |
388 | } | |
389 | ||
390 | static inline struct moschip_port *mos7840_get_port_private(struct | |
391 | usb_serial_port | |
392 | *port) | |
393 | { | |
394 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
395 | } | |
396 | ||
0de9a702 | 397 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
3f542974 PS |
398 | { |
399 | struct moschip_port *mos7840_port; | |
400 | struct async_icount *icount; | |
401 | mos7840_port = port; | |
402 | icount = &mos7840_port->icount; | |
403 | if (new_msr & | |
404 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
405 | MOS_MSR_DELTA_CD)) { | |
406 | icount = &mos7840_port->icount; | |
407 | ||
408 | /* update input line counters */ | |
409 | if (new_msr & MOS_MSR_DELTA_CTS) { | |
410 | icount->cts++; | |
0de9a702 | 411 | smp_wmb(); |
3f542974 PS |
412 | } |
413 | if (new_msr & MOS_MSR_DELTA_DSR) { | |
414 | icount->dsr++; | |
0de9a702 | 415 | smp_wmb(); |
3f542974 PS |
416 | } |
417 | if (new_msr & MOS_MSR_DELTA_CD) { | |
418 | icount->dcd++; | |
0de9a702 | 419 | smp_wmb(); |
3f542974 PS |
420 | } |
421 | if (new_msr & MOS_MSR_DELTA_RI) { | |
422 | icount->rng++; | |
0de9a702 | 423 | smp_wmb(); |
3f542974 | 424 | } |
e670c6af JH |
425 | |
426 | mos7840_port->delta_msr_cond = 1; | |
a14430db | 427 | wake_up_interruptible(&port->port->delta_msr_wait); |
3f542974 | 428 | } |
3f542974 PS |
429 | } |
430 | ||
0de9a702 | 431 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
3f542974 PS |
432 | { |
433 | struct async_icount *icount; | |
434 | ||
3f542974 | 435 | if (new_lsr & SERIAL_LSR_BI) { |
880af9db AC |
436 | /* |
437 | * Parity and Framing errors only count if they | |
438 | * occur exclusive of a break being | |
439 | * received. | |
440 | */ | |
3f542974 PS |
441 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
442 | } | |
443 | ||
444 | /* update input line counters */ | |
445 | icount = &port->icount; | |
446 | if (new_lsr & SERIAL_LSR_BI) { | |
447 | icount->brk++; | |
0de9a702 | 448 | smp_wmb(); |
3f542974 PS |
449 | } |
450 | if (new_lsr & SERIAL_LSR_OE) { | |
451 | icount->overrun++; | |
0de9a702 | 452 | smp_wmb(); |
3f542974 PS |
453 | } |
454 | if (new_lsr & SERIAL_LSR_PE) { | |
455 | icount->parity++; | |
0de9a702 | 456 | smp_wmb(); |
3f542974 PS |
457 | } |
458 | if (new_lsr & SERIAL_LSR_FE) { | |
459 | icount->frame++; | |
0de9a702 | 460 | smp_wmb(); |
3f542974 | 461 | } |
3f542974 PS |
462 | } |
463 | ||
464 | /************************************************************************/ | |
465 | /************************************************************************/ | |
466 | /* U S B C A L L B A C K F U N C T I O N S */ | |
467 | /* U S B C A L L B A C K F U N C T I O N S */ | |
468 | /************************************************************************/ | |
469 | /************************************************************************/ | |
470 | ||
7d12e780 | 471 | static void mos7840_control_callback(struct urb *urb) |
3f542974 PS |
472 | { |
473 | unsigned char *data; | |
474 | struct moschip_port *mos7840_port; | |
9c134a14 | 475 | struct device *dev = &urb->dev->dev; |
3f542974 | 476 | __u8 regval = 0x0; |
0643c724 | 477 | int status = urb->status; |
3f542974 | 478 | |
cdc97792 | 479 | mos7840_port = urb->context; |
0de9a702 | 480 | |
0643c724 | 481 | switch (status) { |
3f542974 PS |
482 | case 0: |
483 | /* success */ | |
484 | break; | |
485 | case -ECONNRESET: | |
486 | case -ENOENT: | |
487 | case -ESHUTDOWN: | |
488 | /* this urb is terminated, clean up */ | |
9c134a14 | 489 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
3f542974 PS |
490 | return; |
491 | default: | |
9c134a14 | 492 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
28c3ae9a | 493 | return; |
3f542974 PS |
494 | } |
495 | ||
9c134a14 GKH |
496 | dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); |
497 | dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, | |
498 | mos7840_port->MsrLsr, mos7840_port->port_num); | |
3f542974 PS |
499 | data = urb->transfer_buffer; |
500 | regval = (__u8) data[0]; | |
9c134a14 | 501 | dev_dbg(dev, "%s data is %x\n", __func__, regval); |
3f542974 PS |
502 | if (mos7840_port->MsrLsr == 0) |
503 | mos7840_handle_new_msr(mos7840_port, regval); | |
504 | else if (mos7840_port->MsrLsr == 1) | |
505 | mos7840_handle_new_lsr(mos7840_port, regval); | |
3f542974 PS |
506 | } |
507 | ||
508 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
880af9db | 509 | __u16 *val) |
3f542974 PS |
510 | { |
511 | struct usb_device *dev = mcs->port->serial->dev; | |
0de9a702 ON |
512 | struct usb_ctrlrequest *dr = mcs->dr; |
513 | unsigned char *buffer = mcs->ctrl_buf; | |
514 | int ret; | |
3f542974 | 515 | |
3f542974 PS |
516 | dr->bRequestType = MCS_RD_RTYPE; |
517 | dr->bRequest = MCS_RDREQ; | |
880af9db | 518 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
3f542974 PS |
519 | dr->wIndex = cpu_to_le16(reg); |
520 | dr->wLength = cpu_to_le16(2); | |
521 | ||
522 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
523 | (unsigned char *)dr, buffer, 2, | |
524 | mos7840_control_callback, mcs); | |
525 | mcs->control_urb->transfer_buffer_length = 2; | |
526 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
527 | return ret; | |
528 | } | |
529 | ||
0eafe4de D |
530 | static void mos7840_set_led_callback(struct urb *urb) |
531 | { | |
532 | switch (urb->status) { | |
533 | case 0: | |
534 | /* Success */ | |
535 | break; | |
536 | case -ECONNRESET: | |
537 | case -ENOENT: | |
538 | case -ESHUTDOWN: | |
539 | /* This urb is terminated, clean up */ | |
9c134a14 GKH |
540 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", |
541 | __func__, urb->status); | |
0eafe4de D |
542 | break; |
543 | default: | |
9c134a14 GKH |
544 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", |
545 | __func__, urb->status); | |
0eafe4de D |
546 | } |
547 | } | |
548 | ||
549 | static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, | |
550 | __u16 reg) | |
551 | { | |
552 | struct usb_device *dev = mcs->port->serial->dev; | |
553 | struct usb_ctrlrequest *dr = mcs->dr; | |
554 | ||
555 | dr->bRequestType = MCS_WR_RTYPE; | |
556 | dr->bRequest = MCS_WRREQ; | |
557 | dr->wValue = cpu_to_le16(wval); | |
558 | dr->wIndex = cpu_to_le16(reg); | |
559 | dr->wLength = cpu_to_le16(0); | |
560 | ||
561 | usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), | |
562 | (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); | |
563 | ||
564 | usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
565 | } | |
566 | ||
567 | static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, | |
568 | __u16 val) | |
569 | { | |
570 | struct usb_device *dev = port->serial->dev; | |
571 | ||
572 | usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, | |
573 | val, reg, NULL, 0, MOS_WDR_TIMEOUT); | |
574 | } | |
575 | ||
576 | static void mos7840_led_off(unsigned long arg) | |
577 | { | |
578 | struct moschip_port *mcs = (struct moschip_port *) arg; | |
579 | ||
580 | /* Turn off LED */ | |
581 | mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); | |
582 | mod_timer(&mcs->led_timer2, | |
583 | jiffies + msecs_to_jiffies(LED_OFF_MS)); | |
584 | } | |
585 | ||
586 | static void mos7840_led_flag_off(unsigned long arg) | |
587 | { | |
588 | struct moschip_port *mcs = (struct moschip_port *) arg; | |
589 | ||
590 | mcs->led_flag = false; | |
591 | } | |
592 | ||
3f542974 PS |
593 | /***************************************************************************** |
594 | * mos7840_interrupt_callback | |
595 | * this is the callback function for when we have received data on the | |
596 | * interrupt endpoint. | |
597 | *****************************************************************************/ | |
598 | ||
7d12e780 | 599 | static void mos7840_interrupt_callback(struct urb *urb) |
3f542974 PS |
600 | { |
601 | int result; | |
602 | int length; | |
603 | struct moschip_port *mos7840_port; | |
604 | struct usb_serial *serial; | |
605 | __u16 Data; | |
606 | unsigned char *data; | |
607 | __u8 sp[5], st; | |
0de9a702 ON |
608 | int i, rv = 0; |
609 | __u16 wval, wreg = 0; | |
0643c724 | 610 | int status = urb->status; |
3f542974 | 611 | |
0643c724 | 612 | switch (status) { |
3f542974 PS |
613 | case 0: |
614 | /* success */ | |
615 | break; | |
616 | case -ECONNRESET: | |
617 | case -ENOENT: | |
618 | case -ESHUTDOWN: | |
619 | /* this urb is terminated, clean up */ | |
9c134a14 GKH |
620 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", |
621 | __func__, status); | |
3f542974 PS |
622 | return; |
623 | default: | |
9c134a14 GKH |
624 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", |
625 | __func__, status); | |
3f542974 PS |
626 | goto exit; |
627 | } | |
628 | ||
629 | length = urb->actual_length; | |
630 | data = urb->transfer_buffer; | |
631 | ||
cdc97792 | 632 | serial = urb->context; |
3f542974 PS |
633 | |
634 | /* Moschip get 5 bytes | |
635 | * Byte 1 IIR Port 1 (port.number is 0) | |
636 | * Byte 2 IIR Port 2 (port.number is 1) | |
637 | * Byte 3 IIR Port 3 (port.number is 2) | |
638 | * Byte 4 IIR Port 4 (port.number is 3) | |
639 | * Byte 5 FIFO status for both */ | |
640 | ||
641 | if (length && length > 5) { | |
9c134a14 | 642 | dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); |
3f542974 PS |
643 | return; |
644 | } | |
645 | ||
646 | sp[0] = (__u8) data[0]; | |
647 | sp[1] = (__u8) data[1]; | |
648 | sp[2] = (__u8) data[2]; | |
649 | sp[3] = (__u8) data[3]; | |
650 | st = (__u8) data[4]; | |
651 | ||
652 | for (i = 0; i < serial->num_ports; i++) { | |
653 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
654 | wval = | |
655 | (((__u16) serial->port[i]->number - | |
656 | (__u16) (serial->minor)) + 1) << 8; | |
657 | if (mos7840_port->open) { | |
658 | if (sp[i] & 0x01) { | |
9c134a14 | 659 | dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); |
3f542974 PS |
660 | } else { |
661 | switch (sp[i] & 0x0f) { | |
662 | case SERIAL_IIR_RLS: | |
9c134a14 GKH |
663 | dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); |
664 | dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); | |
3f542974 | 665 | mos7840_port->MsrLsr = 1; |
0de9a702 | 666 | wreg = LINE_STATUS_REGISTER; |
3f542974 PS |
667 | break; |
668 | case SERIAL_IIR_MS: | |
9c134a14 | 669 | dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); |
3f542974 | 670 | mos7840_port->MsrLsr = 0; |
0de9a702 | 671 | wreg = MODEM_STATUS_REGISTER; |
3f542974 PS |
672 | break; |
673 | } | |
e681b66f | 674 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); |
3f542974 PS |
675 | } |
676 | } | |
677 | } | |
880af9db AC |
678 | if (!(rv < 0)) |
679 | /* the completion handler for the control urb will resubmit */ | |
0de9a702 ON |
680 | return; |
681 | exit: | |
3f542974 PS |
682 | result = usb_submit_urb(urb, GFP_ATOMIC); |
683 | if (result) { | |
684 | dev_err(&urb->dev->dev, | |
685 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 686 | __func__, result); |
3f542974 | 687 | } |
3f542974 PS |
688 | } |
689 | ||
690 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
691 | const char *function) | |
692 | { | |
693 | if (!port) { | |
9c134a14 | 694 | pr_debug("%s - port == NULL\n", function); |
3f542974 PS |
695 | return -1; |
696 | } | |
697 | if (!port->serial) { | |
9c134a14 | 698 | pr_debug("%s - port->serial == NULL\n", function); |
3f542974 PS |
699 | return -1; |
700 | } | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
706 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
707 | const char *function) | |
708 | { | |
709 | if (!serial) { | |
9c134a14 | 710 | pr_debug("%s - serial == NULL\n", function); |
3f542974 PS |
711 | return -1; |
712 | } | |
713 | if (!serial->type) { | |
9c134a14 | 714 | pr_debug("%s - serial->type == NULL!\n", function); |
3f542974 PS |
715 | return -1; |
716 | } | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
722 | const char *function) | |
723 | { | |
724 | /* if no port was specified, or it fails a paranoia check */ | |
725 | if (!port || | |
726 | mos7840_port_paranoia_check(port, function) || | |
727 | mos7840_serial_paranoia_check(port->serial, function)) { | |
880af9db AC |
728 | /* then say that we don't have a valid usb_serial thing, |
729 | * which will end up genrating -ENODEV return values */ | |
3f542974 PS |
730 | return NULL; |
731 | } | |
732 | ||
733 | return port->serial; | |
734 | } | |
735 | ||
736 | /***************************************************************************** | |
737 | * mos7840_bulk_in_callback | |
738 | * this is the callback function for when we have received data on the | |
739 | * bulk in endpoint. | |
740 | *****************************************************************************/ | |
741 | ||
7d12e780 | 742 | static void mos7840_bulk_in_callback(struct urb *urb) |
3f542974 | 743 | { |
0643c724 | 744 | int retval; |
3f542974 PS |
745 | unsigned char *data; |
746 | struct usb_serial *serial; | |
747 | struct usb_serial_port *port; | |
748 | struct moschip_port *mos7840_port; | |
0643c724 | 749 | int status = urb->status; |
3f542974 | 750 | |
cdc97792 | 751 | mos7840_port = urb->context; |
9c134a14 | 752 | if (!mos7840_port) |
50de36f7 | 753 | return; |
50de36f7 GKH |
754 | |
755 | if (status) { | |
9c134a14 | 756 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
50de36f7 | 757 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
758 | return; |
759 | } | |
760 | ||
9c134a14 | 761 | port = mos7840_port->port; |
441b62c1 | 762 | if (mos7840_port_paranoia_check(port, __func__)) { |
50de36f7 | 763 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
764 | return; |
765 | } | |
766 | ||
441b62c1 | 767 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 768 | if (!serial) { |
50de36f7 | 769 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
770 | return; |
771 | } | |
772 | ||
3f542974 | 773 | data = urb->transfer_buffer; |
59d33f2f | 774 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
3f542974 | 775 | |
3f542974 | 776 | if (urb->actual_length) { |
05c7cd39 | 777 | struct tty_port *tport = &mos7840_port->port->port; |
2e124b4a JS |
778 | tty_insert_flip_string(tport, data, urb->actual_length); |
779 | tty_flip_buffer_push(tport); | |
3f542974 | 780 | mos7840_port->icount.rx += urb->actual_length; |
0de9a702 | 781 | smp_wmb(); |
9c134a14 | 782 | dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx); |
3f542974 PS |
783 | } |
784 | ||
785 | if (!mos7840_port->read_urb) { | |
9c134a14 | 786 | dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); |
50de36f7 | 787 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
788 | return; |
789 | } | |
790 | ||
0eafe4de D |
791 | /* Turn on LED */ |
792 | if (mos7840_port->has_led && !mos7840_port->led_flag) { | |
793 | mos7840_port->led_flag = true; | |
794 | mos7840_set_led_async(mos7840_port, 0x0301, | |
795 | MODEM_CONTROL_REGISTER); | |
796 | mod_timer(&mos7840_port->led_timer1, | |
797 | jiffies + msecs_to_jiffies(LED_ON_MS)); | |
798 | } | |
3f542974 | 799 | |
50de36f7 | 800 | mos7840_port->read_urb_busy = true; |
0643c724 | 801 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
0de9a702 | 802 | |
0643c724 | 803 | if (retval) { |
9c134a14 | 804 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
50de36f7 | 805 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
806 | } |
807 | } | |
808 | ||
809 | /***************************************************************************** | |
810 | * mos7840_bulk_out_data_callback | |
880af9db AC |
811 | * this is the callback function for when we have finished sending |
812 | * serial data on the bulk out endpoint. | |
3f542974 PS |
813 | *****************************************************************************/ |
814 | ||
7d12e780 | 815 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
3f542974 PS |
816 | { |
817 | struct moschip_port *mos7840_port; | |
9c134a14 | 818 | struct usb_serial_port *port; |
3f542974 | 819 | struct tty_struct *tty; |
0643c724 | 820 | int status = urb->status; |
0de9a702 ON |
821 | int i; |
822 | ||
cdc97792 | 823 | mos7840_port = urb->context; |
9c134a14 | 824 | port = mos7840_port->port; |
0de9a702 ON |
825 | spin_lock(&mos7840_port->pool_lock); |
826 | for (i = 0; i < NUM_URBS; i++) { | |
827 | if (urb == mos7840_port->write_urb_pool[i]) { | |
828 | mos7840_port->busy[i] = 0; | |
829 | break; | |
830 | } | |
831 | } | |
832 | spin_unlock(&mos7840_port->pool_lock); | |
833 | ||
0643c724 | 834 | if (status) { |
9c134a14 | 835 | dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); |
3f542974 PS |
836 | return; |
837 | } | |
838 | ||
9c134a14 | 839 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 840 | return; |
3f542974 | 841 | |
9c134a14 | 842 | tty = tty_port_tty_get(&port->port); |
b963a844 JS |
843 | if (tty && mos7840_port->open) |
844 | tty_wakeup(tty); | |
4a90f09b | 845 | tty_kref_put(tty); |
3f542974 PS |
846 | |
847 | } | |
848 | ||
849 | /************************************************************************/ | |
850 | /* 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 */ | |
851 | /************************************************************************/ | |
852 | #ifdef MCSSerialProbe | |
853 | static int mos7840_serial_probe(struct usb_serial *serial, | |
854 | const struct usb_device_id *id) | |
855 | { | |
856 | ||
857 | /*need to implement the mode_reg reading and updating\ | |
858 | structures usb_serial_ device_type\ | |
859 | (i.e num_ports, num_bulkin,bulkout etc) */ | |
860 | /* Also we can update the changes attach */ | |
861 | return 1; | |
862 | } | |
863 | #endif | |
864 | ||
865 | /***************************************************************************** | |
866 | * mos7840_open | |
867 | * this function is called by the tty driver when a port is opened | |
868 | * If successful, we return 0 | |
869 | * Otherwise we return a negative error number. | |
870 | *****************************************************************************/ | |
871 | ||
a509a7e4 | 872 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
3f542974 PS |
873 | { |
874 | int response; | |
875 | int j; | |
876 | struct usb_serial *serial; | |
877 | struct urb *urb; | |
878 | __u16 Data; | |
879 | int status; | |
880 | struct moschip_port *mos7840_port; | |
0de9a702 | 881 | struct moschip_port *port0; |
3f542974 | 882 | |
9c134a14 | 883 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 884 | return -ENODEV; |
3f542974 | 885 | |
3f542974 PS |
886 | serial = port->serial; |
887 | ||
9c134a14 | 888 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 889 | return -ENODEV; |
3f542974 PS |
890 | |
891 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 892 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 893 | |
0de9a702 | 894 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 PS |
895 | return -ENODEV; |
896 | ||
897 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
898 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
0de9a702 | 899 | port0->open_ports++; |
3f542974 PS |
900 | |
901 | /* Initialising the write urb pool */ | |
902 | for (j = 0; j < NUM_URBS; ++j) { | |
0de9a702 | 903 | urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 PS |
904 | mos7840_port->write_urb_pool[j] = urb; |
905 | ||
906 | if (urb == NULL) { | |
194343d9 | 907 | dev_err(&port->dev, "No more urbs???\n"); |
3f542974 PS |
908 | continue; |
909 | } | |
910 | ||
880af9db AC |
911 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
912 | GFP_KERNEL); | |
3f542974 | 913 | if (!urb->transfer_buffer) { |
0de9a702 ON |
914 | usb_free_urb(urb); |
915 | mos7840_port->write_urb_pool[j] = NULL; | |
194343d9 GKH |
916 | dev_err(&port->dev, |
917 | "%s-out of memory for urb buffers.\n", | |
918 | __func__); | |
3f542974 PS |
919 | continue; |
920 | } | |
921 | } | |
922 | ||
923 | /***************************************************************************** | |
924 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
925 | * | |
926 | * Register Index | |
927 | * 1 : IER | |
928 | * 2 : FCR | |
929 | * 3 : LCR | |
930 | * 4 : MCR | |
931 | * | |
932 | * 0x08 : SP1/2 Control Reg | |
933 | *****************************************************************************/ | |
934 | ||
880af9db | 935 | /* NEED to check the following Block */ |
3f542974 | 936 | |
3f542974 PS |
937 | Data = 0x0; |
938 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
939 | if (status < 0) { | |
9c134a14 | 940 | dev_dbg(&port->dev, "Reading Spreg failed\n"); |
3f542974 PS |
941 | return -1; |
942 | } | |
943 | Data |= 0x80; | |
944 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
945 | if (status < 0) { | |
9c134a14 | 946 | dev_dbg(&port->dev, "writing Spreg failed\n"); |
3f542974 PS |
947 | return -1; |
948 | } | |
949 | ||
950 | Data &= ~0x80; | |
951 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
952 | if (status < 0) { | |
9c134a14 | 953 | dev_dbg(&port->dev, "writing Spreg failed\n"); |
3f542974 PS |
954 | return -1; |
955 | } | |
880af9db | 956 | /* End of block to be checked */ |
3f542974 | 957 | |
3f542974 | 958 | Data = 0x0; |
880af9db AC |
959 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
960 | &Data); | |
3f542974 | 961 | if (status < 0) { |
9c134a14 | 962 | dev_dbg(&port->dev, "Reading Controlreg failed\n"); |
3f542974 PS |
963 | return -1; |
964 | } | |
880af9db AC |
965 | Data |= 0x08; /* Driver done bit */ |
966 | Data |= 0x20; /* rx_disable */ | |
967 | status = mos7840_set_reg_sync(port, | |
968 | mos7840_port->ControlRegOffset, Data); | |
3f542974 | 969 | if (status < 0) { |
9c134a14 | 970 | dev_dbg(&port->dev, "writing Controlreg failed\n"); |
3f542974 PS |
971 | return -1; |
972 | } | |
880af9db AC |
973 | /* do register settings here */ |
974 | /* Set all regs to the device default values. */ | |
975 | /*********************************** | |
976 | * First Disable all interrupts. | |
977 | ***********************************/ | |
3f542974 | 978 | Data = 0x00; |
3f542974 PS |
979 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
980 | if (status < 0) { | |
9c134a14 | 981 | dev_dbg(&port->dev, "disabling interrupts failed\n"); |
3f542974 PS |
982 | return -1; |
983 | } | |
880af9db | 984 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
3f542974 | 985 | Data = 0x00; |
3f542974 PS |
986 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
987 | if (status < 0) { | |
9c134a14 | 988 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); |
3f542974 PS |
989 | return -1; |
990 | } | |
991 | ||
992 | Data = 0xcf; | |
3f542974 PS |
993 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
994 | if (status < 0) { | |
9c134a14 | 995 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); |
3f542974 PS |
996 | return -1; |
997 | } | |
998 | ||
999 | Data = 0x03; | |
3f542974 PS |
1000 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1001 | mos7840_port->shadowLCR = Data; | |
1002 | ||
1003 | Data = 0x0b; | |
3f542974 PS |
1004 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
1005 | mos7840_port->shadowMCR = Data; | |
1006 | ||
1007 | Data = 0x00; | |
3f542974 PS |
1008 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1009 | mos7840_port->shadowLCR = Data; | |
1010 | ||
880af9db | 1011 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1012 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1013 | ||
1014 | Data = 0x0c; | |
3f542974 PS |
1015 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1016 | ||
1017 | Data = 0x0; | |
3f542974 PS |
1018 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1019 | ||
1020 | Data = 0x00; | |
3f542974 PS |
1021 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1022 | ||
1023 | Data = Data & ~SERIAL_LCR_DLAB; | |
3f542974 PS |
1024 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1025 | mos7840_port->shadowLCR = Data; | |
1026 | ||
880af9db | 1027 | /* clearing Bulkin and Bulkout Fifo */ |
3f542974 | 1028 | Data = 0x0; |
3f542974 PS |
1029 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
1030 | ||
1031 | Data = Data | 0x0c; | |
3f542974 PS |
1032 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
1033 | ||
1034 | Data = Data & ~0x0c; | |
3f542974 | 1035 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
880af9db | 1036 | /* Finally enable all interrupts */ |
3f542974 | 1037 | Data = 0x0c; |
3f542974 PS |
1038 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
1039 | ||
880af9db | 1040 | /* clearing rx_disable */ |
3f542974 | 1041 | Data = 0x0; |
880af9db AC |
1042 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1043 | &Data); | |
3f542974 | 1044 | Data = Data & ~0x20; |
880af9db AC |
1045 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1046 | Data); | |
3f542974 | 1047 | |
880af9db | 1048 | /* rx_negate */ |
3f542974 | 1049 | Data = 0x0; |
880af9db AC |
1050 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1051 | &Data); | |
3f542974 | 1052 | Data = Data | 0x10; |
880af9db AC |
1053 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1054 | Data); | |
3f542974 | 1055 | |
880af9db AC |
1056 | /* Check to see if we've set up our endpoint info yet * |
1057 | * (can't set it up in mos7840_startup as the structures * | |
1058 | * were not set up at that time.) */ | |
0de9a702 | 1059 | if (port0->open_ports == 1) { |
3f542974 | 1060 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
3f542974 | 1061 | /* set up interrupt urb */ |
3f542974 | 1062 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
880af9db AC |
1063 | serial->dev, |
1064 | usb_rcvintpipe(serial->dev, | |
1065 | serial->port[0]->interrupt_in_endpointAddress), | |
1066 | serial->port[0]->interrupt_in_buffer, | |
1067 | serial->port[0]->interrupt_in_urb-> | |
1068 | transfer_buffer_length, | |
1069 | mos7840_interrupt_callback, | |
1070 | serial, | |
1071 | serial->port[0]->interrupt_in_urb->interval); | |
3f542974 PS |
1072 | |
1073 | /* start interrupt read for mos7840 * | |
1074 | * will continue as long as mos7840 is connected */ | |
1075 | ||
1076 | response = | |
1077 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1078 | GFP_KERNEL); | |
1079 | if (response) { | |
194343d9 GKH |
1080 | dev_err(&port->dev, "%s - Error %d submitting " |
1081 | "interrupt urb\n", __func__, response); | |
3f542974 PS |
1082 | } |
1083 | ||
1084 | } | |
1085 | ||
1086 | } | |
1087 | ||
1088 | /* see if we've set up our endpoint info yet * | |
1089 | * (can't set it up in mos7840_startup as the * | |
1090 | * structures were not set up at that time.) */ | |
1091 | ||
9c134a14 GKH |
1092 | dev_dbg(&port->dev, "port number is %d\n", port->number); |
1093 | dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); | |
1094 | dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); | |
1095 | dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); | |
1096 | dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); | |
1097 | dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); | |
3f542974 PS |
1098 | mos7840_port->read_urb = port->read_urb; |
1099 | ||
1100 | /* set up our bulk in urb */ | |
093ea2d3 DL |
1101 | if ((serial->num_ports == 2) |
1102 | && ((((__u16)port->number - | |
1103 | (__u16)(port->serial->minor)) % 2) != 0)) { | |
1104 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1105 | serial->dev, | |
1106 | usb_rcvbulkpipe(serial->dev, | |
1107 | (port->bulk_in_endpointAddress) + 2), | |
1108 | port->bulk_in_buffer, | |
1109 | mos7840_port->read_urb->transfer_buffer_length, | |
1110 | mos7840_bulk_in_callback, mos7840_port); | |
1111 | } else { | |
1112 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1113 | serial->dev, | |
1114 | usb_rcvbulkpipe(serial->dev, | |
1115 | port->bulk_in_endpointAddress), | |
1116 | port->bulk_in_buffer, | |
1117 | mos7840_port->read_urb->transfer_buffer_length, | |
1118 | mos7840_bulk_in_callback, mos7840_port); | |
1119 | } | |
3f542974 | 1120 | |
9c134a14 | 1121 | dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); |
50de36f7 | 1122 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
1123 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
1124 | if (response) { | |
194343d9 GKH |
1125 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
1126 | __func__, response); | |
50de36f7 | 1127 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1128 | } |
1129 | ||
1130 | /* initialize our wait queues */ | |
1131 | init_waitqueue_head(&mos7840_port->wait_chase); | |
3f542974 PS |
1132 | |
1133 | /* initialize our icount structure */ | |
1134 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); | |
1135 | ||
1136 | /* initialize our port settings */ | |
880af9db AC |
1137 | /* Must set to enable ints! */ |
1138 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
3f542974 PS |
1139 | /* send a open port command */ |
1140 | mos7840_port->open = 1; | |
880af9db | 1141 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
3f542974 PS |
1142 | mos7840_port->icount.tx = 0; |
1143 | mos7840_port->icount.rx = 0; | |
1144 | ||
3f542974 | 1145 | return 0; |
3f542974 PS |
1146 | } |
1147 | ||
1148 | /***************************************************************************** | |
1149 | * mos7840_chars_in_buffer | |
1150 | * this function is called by the tty driver when it wants to know how many | |
1151 | * bytes of data we currently have outstanding in the port (data that has | |
1152 | * been written, but hasn't made it out the port yet) | |
1153 | * If successful, we return the number of bytes left to be written in the | |
1154 | * system, | |
95da310e | 1155 | * Otherwise we return zero. |
3f542974 PS |
1156 | *****************************************************************************/ |
1157 | ||
95da310e | 1158 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
3f542974 | 1159 | { |
95da310e | 1160 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1161 | int i; |
1162 | int chars = 0; | |
0de9a702 | 1163 | unsigned long flags; |
3f542974 PS |
1164 | struct moschip_port *mos7840_port; |
1165 | ||
9c134a14 | 1166 | if (mos7840_port_paranoia_check(port, __func__)) |
95da310e | 1167 | return 0; |
3f542974 PS |
1168 | |
1169 | mos7840_port = mos7840_get_port_private(port); | |
3363155b | 1170 | if (mos7840_port == NULL) |
95da310e | 1171 | return 0; |
3f542974 | 1172 | |
880af9db | 1173 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
5c263b92 MF |
1174 | for (i = 0; i < NUM_URBS; ++i) { |
1175 | if (mos7840_port->busy[i]) { | |
1176 | struct urb *urb = mos7840_port->write_urb_pool[i]; | |
1177 | chars += urb->transfer_buffer_length; | |
1178 | } | |
1179 | } | |
880af9db | 1180 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
9c134a14 | 1181 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0de9a702 | 1182 | return chars; |
3f542974 PS |
1183 | |
1184 | } | |
1185 | ||
3f542974 PS |
1186 | /***************************************************************************** |
1187 | * mos7840_close | |
1188 | * this function is called by the tty driver when a port is closed | |
1189 | *****************************************************************************/ | |
1190 | ||
335f8514 | 1191 | static void mos7840_close(struct usb_serial_port *port) |
3f542974 PS |
1192 | { |
1193 | struct usb_serial *serial; | |
1194 | struct moschip_port *mos7840_port; | |
0de9a702 | 1195 | struct moschip_port *port0; |
3f542974 PS |
1196 | int j; |
1197 | __u16 Data; | |
1198 | ||
9c134a14 | 1199 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1200 | return; |
3f542974 | 1201 | |
441b62c1 | 1202 | serial = mos7840_get_usb_serial(port, __func__); |
9c134a14 | 1203 | if (!serial) |
3f542974 | 1204 | return; |
3f542974 PS |
1205 | |
1206 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 1207 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 1208 | |
0de9a702 | 1209 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 | 1210 | return; |
3f542974 PS |
1211 | |
1212 | for (j = 0; j < NUM_URBS; ++j) | |
1213 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1214 | ||
1215 | /* Freeing Write URBs */ | |
1216 | for (j = 0; j < NUM_URBS; ++j) { | |
1217 | if (mos7840_port->write_urb_pool[j]) { | |
1218 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1219 | kfree(mos7840_port->write_urb_pool[j]-> | |
1220 | transfer_buffer); | |
1221 | ||
1222 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1223 | } | |
1224 | } | |
1225 | ||
3f542974 PS |
1226 | /* While closing port, shutdown all bulk read, write * |
1227 | * and interrupt read if they exists */ | |
1228 | if (serial->dev) { | |
3f542974 | 1229 | if (mos7840_port->write_urb) { |
9c134a14 | 1230 | dev_dbg(&port->dev, "%s", "Shutdown bulk write\n"); |
3f542974 PS |
1231 | usb_kill_urb(mos7840_port->write_urb); |
1232 | } | |
3f542974 | 1233 | if (mos7840_port->read_urb) { |
9c134a14 | 1234 | dev_dbg(&port->dev, "%s", "Shutdown bulk read\n"); |
3f542974 | 1235 | usb_kill_urb(mos7840_port->read_urb); |
50de36f7 | 1236 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1237 | } |
1238 | if ((&mos7840_port->control_urb)) { | |
9c134a14 | 1239 | dev_dbg(&port->dev, "%s", "Shutdown control read\n"); |
880af9db | 1240 | /*/ usb_kill_urb (mos7840_port->control_urb); */ |
3f542974 PS |
1241 | } |
1242 | } | |
880af9db AC |
1243 | /* if(mos7840_port->ctrl_buf != NULL) */ |
1244 | /* kfree(mos7840_port->ctrl_buf); */ | |
0de9a702 | 1245 | port0->open_ports--; |
9c134a14 | 1246 | dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); |
0de9a702 | 1247 | if (port0->open_ports == 0) { |
3f542974 | 1248 | if (serial->port[0]->interrupt_in_urb) { |
9c134a14 | 1249 | dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); |
0de9a702 | 1250 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
3f542974 PS |
1251 | } |
1252 | } | |
1253 | ||
1254 | if (mos7840_port->write_urb) { | |
1255 | /* if this urb had a transfer buffer already (old tx) free it */ | |
880af9db | 1256 | if (mos7840_port->write_urb->transfer_buffer != NULL) |
3f542974 | 1257 | kfree(mos7840_port->write_urb->transfer_buffer); |
3f542974 PS |
1258 | usb_free_urb(mos7840_port->write_urb); |
1259 | } | |
1260 | ||
1261 | Data = 0x0; | |
1262 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1263 | ||
1264 | Data = 0x00; | |
1265 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1266 | ||
1267 | mos7840_port->open = 0; | |
3f542974 PS |
1268 | } |
1269 | ||
1270 | /************************************************************************ | |
1271 | * | |
1272 | * mos7840_block_until_chase_response | |
1273 | * | |
1274 | * This function will block the close until one of the following: | |
1275 | * 1. Response to our Chase comes from mos7840 | |
dc0d5c1e | 1276 | * 2. A timeout of 10 seconds without activity has expired |
3f542974 PS |
1277 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
1278 | * | |
1279 | ************************************************************************/ | |
1280 | ||
95da310e AC |
1281 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
1282 | struct moschip_port *mos7840_port) | |
3f542974 | 1283 | { |
1e658489 | 1284 | int timeout = msecs_to_jiffies(1000); |
3f542974 PS |
1285 | int wait = 10; |
1286 | int count; | |
1287 | ||
1288 | while (1) { | |
95da310e | 1289 | count = mos7840_chars_in_buffer(tty); |
3f542974 PS |
1290 | |
1291 | /* Check for Buffer status */ | |
880af9db | 1292 | if (count <= 0) |
3f542974 | 1293 | return; |
3f542974 PS |
1294 | |
1295 | /* Block the thread for a while */ | |
1296 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1297 | timeout); | |
1298 | /* No activity.. count down section */ | |
1299 | wait--; | |
1300 | if (wait == 0) { | |
9c134a14 | 1301 | dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); |
3f542974 PS |
1302 | return; |
1303 | } else { | |
dc0d5c1e | 1304 | /* Reset timeout value back to seconds */ |
3f542974 PS |
1305 | wait = 10; |
1306 | } | |
1307 | } | |
1308 | ||
1309 | } | |
1310 | ||
1311 | /***************************************************************************** | |
1312 | * mos7840_break | |
1313 | * this function sends a break to the port | |
1314 | *****************************************************************************/ | |
95da310e | 1315 | static void mos7840_break(struct tty_struct *tty, int break_state) |
3f542974 | 1316 | { |
95da310e | 1317 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1318 | unsigned char data; |
1319 | struct usb_serial *serial; | |
1320 | struct moschip_port *mos7840_port; | |
1321 | ||
9c134a14 | 1322 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1323 | return; |
3f542974 | 1324 | |
441b62c1 | 1325 | serial = mos7840_get_usb_serial(port, __func__); |
9c134a14 | 1326 | if (!serial) |
3f542974 | 1327 | return; |
3f542974 PS |
1328 | |
1329 | mos7840_port = mos7840_get_port_private(port); | |
1330 | ||
880af9db | 1331 | if (mos7840_port == NULL) |
3f542974 | 1332 | return; |
3f542974 | 1333 | |
95da310e | 1334 | if (serial->dev) |
3f542974 | 1335 | /* flush and block until tx is empty */ |
95da310e | 1336 | mos7840_block_until_chase_response(tty, mos7840_port); |
3f542974 | 1337 | |
95da310e | 1338 | if (break_state == -1) |
3f542974 | 1339 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
95da310e | 1340 | else |
3f542974 | 1341 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
3f542974 | 1342 | |
6b447f04 | 1343 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
3f542974 | 1344 | mos7840_port->shadowLCR = data; |
9c134a14 | 1345 | dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); |
3f542974 PS |
1346 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, |
1347 | mos7840_port->shadowLCR); | |
3f542974 PS |
1348 | } |
1349 | ||
1350 | /***************************************************************************** | |
1351 | * mos7840_write_room | |
1352 | * this function is called by the tty driver when it wants to know how many | |
1353 | * bytes of data we can accept for a specific port. | |
1354 | * If successful, we return the amount of room that we have for this port | |
1355 | * Otherwise we return a negative error number. | |
1356 | *****************************************************************************/ | |
1357 | ||
95da310e | 1358 | static int mos7840_write_room(struct tty_struct *tty) |
3f542974 | 1359 | { |
95da310e | 1360 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1361 | int i; |
1362 | int room = 0; | |
0de9a702 | 1363 | unsigned long flags; |
3f542974 PS |
1364 | struct moschip_port *mos7840_port; |
1365 | ||
9c134a14 | 1366 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1367 | return -1; |
3f542974 PS |
1368 | |
1369 | mos7840_port = mos7840_get_port_private(port); | |
9c134a14 | 1370 | if (mos7840_port == NULL) |
3f542974 | 1371 | return -1; |
3f542974 | 1372 | |
0de9a702 | 1373 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1374 | for (i = 0; i < NUM_URBS; ++i) { |
880af9db | 1375 | if (!mos7840_port->busy[i]) |
3f542974 | 1376 | room += URB_TRANSFER_BUFFER_SIZE; |
3f542974 | 1377 | } |
0de9a702 | 1378 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 | 1379 | |
0de9a702 | 1380 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
9c134a14 | 1381 | dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); |
0de9a702 | 1382 | return room; |
3f542974 PS |
1383 | |
1384 | } | |
1385 | ||
1386 | /***************************************************************************** | |
1387 | * mos7840_write | |
1388 | * this function is called by the tty driver when data should be written to | |
1389 | * the port. | |
1390 | * If successful, we return the number of bytes written, otherwise we | |
1391 | * return a negative error number. | |
1392 | *****************************************************************************/ | |
1393 | ||
95da310e | 1394 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
3f542974 PS |
1395 | const unsigned char *data, int count) |
1396 | { | |
1397 | int status; | |
1398 | int i; | |
1399 | int bytes_sent = 0; | |
1400 | int transfer_size; | |
0de9a702 | 1401 | unsigned long flags; |
3f542974 PS |
1402 | |
1403 | struct moschip_port *mos7840_port; | |
1404 | struct usb_serial *serial; | |
1405 | struct urb *urb; | |
880af9db | 1406 | /* __u16 Data; */ |
3f542974 PS |
1407 | const unsigned char *current_position = data; |
1408 | unsigned char *data1; | |
3f542974 PS |
1409 | |
1410 | #ifdef NOTMOS7840 | |
1411 | Data = 0x00; | |
3f542974 PS |
1412 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1413 | mos7840_port->shadowLCR = Data; | |
9c134a14 GKH |
1414 | dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); |
1415 | dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); | |
3f542974 | 1416 | |
880af9db AC |
1417 | /* Data = 0x03; */ |
1418 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ | |
1419 | /* mos7840_port->shadowLCR=Data;//Need to add later */ | |
3f542974 | 1420 | |
880af9db | 1421 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1422 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1423 | ||
880af9db AC |
1424 | /* Data = 0x0c; */ |
1425 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ | |
3f542974 | 1426 | Data = 0x00; |
3f542974 | 1427 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
9c134a14 | 1428 | dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); |
3f542974 PS |
1429 | |
1430 | Data = 0x0; | |
3f542974 | 1431 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
9c134a14 | 1432 | dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); |
3f542974 PS |
1433 | |
1434 | Data = Data & ~SERIAL_LCR_DLAB; | |
9c134a14 | 1435 | dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); |
3f542974 PS |
1436 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1437 | #endif | |
1438 | ||
9c134a14 | 1439 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1440 | return -1; |
3f542974 PS |
1441 | |
1442 | serial = port->serial; | |
9c134a14 | 1443 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 1444 | return -1; |
3f542974 PS |
1445 | |
1446 | mos7840_port = mos7840_get_port_private(port); | |
9c134a14 | 1447 | if (mos7840_port == NULL) |
3f542974 | 1448 | return -1; |
3f542974 PS |
1449 | |
1450 | /* try to find a free urb in the list */ | |
1451 | urb = NULL; | |
1452 | ||
0de9a702 | 1453 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1454 | for (i = 0; i < NUM_URBS; ++i) { |
0de9a702 ON |
1455 | if (!mos7840_port->busy[i]) { |
1456 | mos7840_port->busy[i] = 1; | |
3f542974 | 1457 | urb = mos7840_port->write_urb_pool[i]; |
9c134a14 | 1458 | dev_dbg(&port->dev, "URB:%d\n", i); |
3f542974 PS |
1459 | break; |
1460 | } | |
1461 | } | |
0de9a702 | 1462 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 PS |
1463 | |
1464 | if (urb == NULL) { | |
9c134a14 | 1465 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
3f542974 PS |
1466 | goto exit; |
1467 | } | |
1468 | ||
1469 | if (urb->transfer_buffer == NULL) { | |
1470 | urb->transfer_buffer = | |
1471 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
1472 | ||
1473 | if (urb->transfer_buffer == NULL) { | |
22a416c4 | 1474 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1475 | __func__); |
3f542974 PS |
1476 | goto exit; |
1477 | } | |
1478 | } | |
1479 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1480 | ||
97c4965d | 1481 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
3f542974 PS |
1482 | |
1483 | /* fill urb with data and submit */ | |
093ea2d3 DL |
1484 | if ((serial->num_ports == 2) |
1485 | && ((((__u16)port->number - | |
1486 | (__u16)(port->serial->minor)) % 2) != 0)) { | |
1487 | usb_fill_bulk_urb(urb, | |
1488 | serial->dev, | |
1489 | usb_sndbulkpipe(serial->dev, | |
1490 | (port->bulk_out_endpointAddress) + 2), | |
1491 | urb->transfer_buffer, | |
1492 | transfer_size, | |
1493 | mos7840_bulk_out_data_callback, mos7840_port); | |
1494 | } else { | |
1495 | usb_fill_bulk_urb(urb, | |
1496 | serial->dev, | |
1497 | usb_sndbulkpipe(serial->dev, | |
1498 | port->bulk_out_endpointAddress), | |
1499 | urb->transfer_buffer, | |
1500 | transfer_size, | |
1501 | mos7840_bulk_out_data_callback, mos7840_port); | |
1502 | } | |
3f542974 PS |
1503 | |
1504 | data1 = urb->transfer_buffer; | |
9c134a14 | 1505 | dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); |
3f542974 | 1506 | |
0eafe4de D |
1507 | /* Turn on LED */ |
1508 | if (mos7840_port->has_led && !mos7840_port->led_flag) { | |
1509 | mos7840_port->led_flag = true; | |
1510 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); | |
1511 | mod_timer(&mos7840_port->led_timer1, | |
1512 | jiffies + msecs_to_jiffies(LED_ON_MS)); | |
1513 | } | |
1514 | ||
3f542974 PS |
1515 | /* send it down the pipe */ |
1516 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1517 | ||
1518 | if (status) { | |
0de9a702 | 1519 | mos7840_port->busy[i] = 0; |
22a416c4 | 1520 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1521 | "with status = %d\n", __func__, status); |
3f542974 PS |
1522 | bytes_sent = status; |
1523 | goto exit; | |
1524 | } | |
1525 | bytes_sent = transfer_size; | |
1526 | mos7840_port->icount.tx += transfer_size; | |
0de9a702 | 1527 | smp_wmb(); |
9c134a14 | 1528 | dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); |
95da310e | 1529 | exit: |
3f542974 PS |
1530 | return bytes_sent; |
1531 | ||
1532 | } | |
1533 | ||
1534 | /***************************************************************************** | |
1535 | * mos7840_throttle | |
1536 | * this function is called by the tty driver when it wants to stop the data | |
1537 | * being read from the port. | |
1538 | *****************************************************************************/ | |
1539 | ||
95da310e | 1540 | static void mos7840_throttle(struct tty_struct *tty) |
3f542974 | 1541 | { |
95da310e | 1542 | struct usb_serial_port *port = tty->driver_data; |
3f542974 | 1543 | struct moschip_port *mos7840_port; |
3f542974 PS |
1544 | int status; |
1545 | ||
9c134a14 | 1546 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1547 | return; |
3f542974 PS |
1548 | |
1549 | mos7840_port = mos7840_get_port_private(port); | |
1550 | ||
1551 | if (mos7840_port == NULL) | |
1552 | return; | |
1553 | ||
1554 | if (!mos7840_port->open) { | |
9c134a14 | 1555 | dev_dbg(&port->dev, "%s", "port not opened\n"); |
3f542974 PS |
1556 | return; |
1557 | } | |
1558 | ||
3f542974 PS |
1559 | /* if we are implementing XON/XOFF, send the stop character */ |
1560 | if (I_IXOFF(tty)) { | |
1561 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e AC |
1562 | status = mos7840_write(tty, port, &stop_char, 1); |
1563 | if (status <= 0) | |
3f542974 | 1564 | return; |
3f542974 | 1565 | } |
3f542974 | 1566 | /* if we are implementing RTS/CTS, toggle that line */ |
adc8d746 | 1567 | if (tty->termios.c_cflag & CRTSCTS) { |
3f542974 | 1568 | mos7840_port->shadowMCR &= ~MCR_RTS; |
95da310e | 1569 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1570 | mos7840_port->shadowMCR); |
95da310e | 1571 | if (status < 0) |
3f542974 | 1572 | return; |
3f542974 | 1573 | } |
3f542974 PS |
1574 | } |
1575 | ||
1576 | /***************************************************************************** | |
1577 | * mos7840_unthrottle | |
880af9db AC |
1578 | * this function is called by the tty driver when it wants to resume |
1579 | * the data being read from the port (called after mos7840_throttle is | |
1580 | * called) | |
3f542974 | 1581 | *****************************************************************************/ |
95da310e | 1582 | static void mos7840_unthrottle(struct tty_struct *tty) |
3f542974 | 1583 | { |
95da310e | 1584 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1585 | int status; |
1586 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1587 | ||
9c134a14 | 1588 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1589 | return; |
3f542974 PS |
1590 | |
1591 | if (mos7840_port == NULL) | |
1592 | return; | |
1593 | ||
1594 | if (!mos7840_port->open) { | |
9c134a14 | 1595 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
1596 | return; |
1597 | } | |
1598 | ||
3f542974 PS |
1599 | /* if we are implementing XON/XOFF, send the start character */ |
1600 | if (I_IXOFF(tty)) { | |
1601 | unsigned char start_char = START_CHAR(tty); | |
95da310e AC |
1602 | status = mos7840_write(tty, port, &start_char, 1); |
1603 | if (status <= 0) | |
3f542974 | 1604 | return; |
3f542974 PS |
1605 | } |
1606 | ||
1607 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1608 | if (tty->termios.c_cflag & CRTSCTS) { |
3f542974 | 1609 | mos7840_port->shadowMCR |= MCR_RTS; |
95da310e | 1610 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1611 | mos7840_port->shadowMCR); |
95da310e | 1612 | if (status < 0) |
3f542974 | 1613 | return; |
3f542974 | 1614 | } |
3f542974 PS |
1615 | } |
1616 | ||
60b33c13 | 1617 | static int mos7840_tiocmget(struct tty_struct *tty) |
3f542974 | 1618 | { |
95da310e | 1619 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1620 | struct moschip_port *mos7840_port; |
1621 | unsigned int result; | |
1622 | __u16 msr; | |
1623 | __u16 mcr; | |
880af9db | 1624 | int status; |
3f542974 PS |
1625 | mos7840_port = mos7840_get_port_private(port); |
1626 | ||
3f542974 PS |
1627 | if (mos7840_port == NULL) |
1628 | return -ENODEV; | |
1629 | ||
1630 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
1631 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); | |
1632 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | |
1633 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1634 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1635 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1636 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1637 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1638 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1639 | ||
9c134a14 | 1640 | dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); |
3f542974 PS |
1641 | |
1642 | return result; | |
1643 | } | |
1644 | ||
20b9d177 | 1645 | static int mos7840_tiocmset(struct tty_struct *tty, |
3f542974 PS |
1646 | unsigned int set, unsigned int clear) |
1647 | { | |
95da310e | 1648 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1649 | struct moschip_port *mos7840_port; |
1650 | unsigned int mcr; | |
87521c46 | 1651 | int status; |
3f542974 | 1652 | |
3f542974 PS |
1653 | mos7840_port = mos7840_get_port_private(port); |
1654 | ||
1655 | if (mos7840_port == NULL) | |
1656 | return -ENODEV; | |
1657 | ||
e2984494 | 1658 | /* FIXME: What locks the port registers ? */ |
3f542974 PS |
1659 | mcr = mos7840_port->shadowMCR; |
1660 | if (clear & TIOCM_RTS) | |
1661 | mcr &= ~MCR_RTS; | |
1662 | if (clear & TIOCM_DTR) | |
1663 | mcr &= ~MCR_DTR; | |
1664 | if (clear & TIOCM_LOOP) | |
1665 | mcr &= ~MCR_LOOPBACK; | |
1666 | ||
1667 | if (set & TIOCM_RTS) | |
1668 | mcr |= MCR_RTS; | |
1669 | if (set & TIOCM_DTR) | |
1670 | mcr |= MCR_DTR; | |
1671 | if (set & TIOCM_LOOP) | |
1672 | mcr |= MCR_LOOPBACK; | |
1673 | ||
1674 | mos7840_port->shadowMCR = mcr; | |
1675 | ||
3f542974 PS |
1676 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
1677 | if (status < 0) { | |
9c134a14 | 1678 | dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); |
87521c46 | 1679 | return status; |
3f542974 PS |
1680 | } |
1681 | ||
1682 | return 0; | |
1683 | } | |
1684 | ||
1685 | /***************************************************************************** | |
1686 | * mos7840_calc_baud_rate_divisor | |
1687 | * this function calculates the proper baud rate divisor for the specified | |
1688 | * baud rate. | |
1689 | *****************************************************************************/ | |
9c134a14 GKH |
1690 | static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, |
1691 | int baudRate, int *divisor, | |
880af9db | 1692 | __u16 *clk_sel_val) |
3f542974 | 1693 | { |
9c134a14 | 1694 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); |
3f542974 PS |
1695 | |
1696 | if (baudRate <= 115200) { | |
1697 | *divisor = 115200 / baudRate; | |
1698 | *clk_sel_val = 0x0; | |
1699 | } | |
1700 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1701 | *divisor = 230400 / baudRate; | |
1702 | *clk_sel_val = 0x10; | |
1703 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1704 | *divisor = 403200 / baudRate; | |
1705 | *clk_sel_val = 0x20; | |
1706 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1707 | *divisor = 460800 / baudRate; | |
1708 | *clk_sel_val = 0x30; | |
1709 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1710 | *divisor = 806400 / baudRate; | |
1711 | *clk_sel_val = 0x40; | |
1712 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1713 | *divisor = 921600 / baudRate; | |
1714 | *clk_sel_val = 0x50; | |
1715 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1716 | *divisor = 1572864 / baudRate; | |
1717 | *clk_sel_val = 0x60; | |
1718 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1719 | *divisor = 3145728 / baudRate; | |
1720 | *clk_sel_val = 0x70; | |
1721 | } | |
1722 | return 0; | |
1723 | ||
1724 | #ifdef NOTMCS7840 | |
1725 | ||
1726 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1727 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1728 | *divisor = mos7840_divisor_table[i].Divisor; | |
1729 | return 0; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | /* After trying for all the standard baud rates * | |
1734 | * Try calculating the divisor for this baud rate */ | |
1735 | ||
1736 | if (baudrate > 75 && baudrate < 230400) { | |
1737 | /* get the divisor */ | |
1738 | custom = (__u16) (230400L / baudrate); | |
1739 | ||
1740 | /* Check for round off */ | |
1741 | round1 = (__u16) (2304000L / baudrate); | |
1742 | round = (__u16) (round1 - (custom * 10)); | |
880af9db | 1743 | if (round > 4) |
3f542974 | 1744 | custom++; |
3f542974 PS |
1745 | *divisor = custom; |
1746 | ||
9c134a14 | 1747 | dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); |
3f542974 PS |
1748 | return 0; |
1749 | } | |
1750 | ||
9c134a14 | 1751 | dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); |
3f542974 PS |
1752 | return -1; |
1753 | #endif | |
1754 | } | |
1755 | ||
1756 | /***************************************************************************** | |
1757 | * mos7840_send_cmd_write_baud_rate | |
1758 | * this function sends the proper command to change the baud rate of the | |
1759 | * specified port. | |
1760 | *****************************************************************************/ | |
1761 | ||
1762 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1763 | int baudRate) | |
1764 | { | |
1765 | int divisor = 0; | |
1766 | int status; | |
1767 | __u16 Data; | |
1768 | unsigned char number; | |
1769 | __u16 clk_sel_val; | |
1770 | struct usb_serial_port *port; | |
1771 | ||
1772 | if (mos7840_port == NULL) | |
1773 | return -1; | |
1774 | ||
9c134a14 GKH |
1775 | port = mos7840_port->port; |
1776 | if (mos7840_port_paranoia_check(port, __func__)) | |
3f542974 | 1777 | return -1; |
3f542974 | 1778 | |
9c134a14 | 1779 | if (mos7840_serial_paranoia_check(port->serial, __func__)) |
3f542974 | 1780 | return -1; |
3f542974 | 1781 | |
3f542974 PS |
1782 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; |
1783 | ||
9c134a14 GKH |
1784 | dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, |
1785 | mos7840_port->port->number, baudRate); | |
880af9db | 1786 | /* reset clk_uart_sel in spregOffset */ |
3f542974 PS |
1787 | if (baudRate > 115200) { |
1788 | #ifdef HW_flow_control | |
880af9db AC |
1789 | /* NOTE: need to see the pther register to modify */ |
1790 | /* setting h/w flow control bit to 1 */ | |
3f542974 PS |
1791 | Data = 0x2b; |
1792 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1793 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1794 | Data); | |
3f542974 | 1795 | if (status < 0) { |
9c134a14 | 1796 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1797 | return -1; |
1798 | } | |
1799 | #endif | |
1800 | ||
1801 | } else { | |
1802 | #ifdef HW_flow_control | |
093ea2d3 | 1803 | /* setting h/w flow control bit to 0 */ |
3f542974 PS |
1804 | Data = 0xb; |
1805 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1806 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1807 | Data); | |
3f542974 | 1808 | if (status < 0) { |
9c134a14 | 1809 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1810 | return -1; |
1811 | } | |
1812 | #endif | |
1813 | ||
1814 | } | |
1815 | ||
880af9db | 1816 | if (1) { /* baudRate <= 115200) */ |
3f542974 PS |
1817 | clk_sel_val = 0x0; |
1818 | Data = 0x0; | |
9c134a14 | 1819 | status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, |
3f542974 | 1820 | &clk_sel_val); |
880af9db AC |
1821 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
1822 | &Data); | |
3f542974 | 1823 | if (status < 0) { |
9c134a14 | 1824 | dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); |
3f542974 PS |
1825 | return -1; |
1826 | } | |
1827 | Data = (Data & 0x8f) | clk_sel_val; | |
880af9db AC |
1828 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
1829 | Data); | |
3f542974 | 1830 | if (status < 0) { |
9c134a14 | 1831 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1832 | return -1; |
1833 | } | |
1834 | /* Calculate the Divisor */ | |
1835 | ||
1836 | if (status) { | |
194343d9 | 1837 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
3f542974 PS |
1838 | return status; |
1839 | } | |
1840 | /* Enable access to divisor latch */ | |
1841 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1842 | mos7840_port->shadowLCR = Data; | |
1843 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1844 | ||
1845 | /* Write the divisor */ | |
1846 | Data = (unsigned char)(divisor & 0xff); | |
9c134a14 | 1847 | dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); |
3f542974 PS |
1848 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1849 | ||
1850 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
9c134a14 | 1851 | dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); |
3f542974 PS |
1852 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1853 | ||
1854 | /* Disable access to divisor latch */ | |
1855 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1856 | mos7840_port->shadowLCR = Data; | |
1857 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1858 | ||
1859 | } | |
3f542974 PS |
1860 | return status; |
1861 | } | |
1862 | ||
1863 | /***************************************************************************** | |
1864 | * mos7840_change_port_settings | |
1865 | * This routine is called to set the UART on the device to match | |
1866 | * the specified new settings. | |
1867 | *****************************************************************************/ | |
1868 | ||
95da310e AC |
1869 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1870 | struct moschip_port *mos7840_port, struct ktermios *old_termios) | |
3f542974 | 1871 | { |
3f542974 PS |
1872 | int baud; |
1873 | unsigned cflag; | |
1874 | unsigned iflag; | |
1875 | __u8 lData; | |
1876 | __u8 lParity; | |
1877 | __u8 lStop; | |
1878 | int status; | |
1879 | __u16 Data; | |
1880 | struct usb_serial_port *port; | |
1881 | struct usb_serial *serial; | |
1882 | ||
1883 | if (mos7840_port == NULL) | |
1884 | return; | |
1885 | ||
9c134a14 | 1886 | port = mos7840_port->port; |
3f542974 | 1887 | |
9c134a14 | 1888 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1889 | return; |
3f542974 | 1890 | |
9c134a14 | 1891 | if (mos7840_serial_paranoia_check(port->serial, __func__)) |
3f542974 | 1892 | return; |
3f542974 PS |
1893 | |
1894 | serial = port->serial; | |
1895 | ||
3f542974 | 1896 | if (!mos7840_port->open) { |
9c134a14 | 1897 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
1898 | return; |
1899 | } | |
1900 | ||
3f542974 PS |
1901 | lData = LCR_BITS_8; |
1902 | lStop = LCR_STOP_1; | |
1903 | lParity = LCR_PAR_NONE; | |
1904 | ||
adc8d746 AC |
1905 | cflag = tty->termios.c_cflag; |
1906 | iflag = tty->termios.c_iflag; | |
3f542974 PS |
1907 | |
1908 | /* Change the number of bits */ | |
1909 | if (cflag & CSIZE) { | |
1910 | switch (cflag & CSIZE) { | |
1911 | case CS5: | |
1912 | lData = LCR_BITS_5; | |
1913 | break; | |
1914 | ||
1915 | case CS6: | |
1916 | lData = LCR_BITS_6; | |
1917 | break; | |
1918 | ||
1919 | case CS7: | |
1920 | lData = LCR_BITS_7; | |
1921 | break; | |
1922 | default: | |
1923 | case CS8: | |
1924 | lData = LCR_BITS_8; | |
1925 | break; | |
1926 | } | |
1927 | } | |
1928 | /* Change the Parity bit */ | |
1929 | if (cflag & PARENB) { | |
1930 | if (cflag & PARODD) { | |
1931 | lParity = LCR_PAR_ODD; | |
9c134a14 | 1932 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
3f542974 PS |
1933 | } else { |
1934 | lParity = LCR_PAR_EVEN; | |
9c134a14 | 1935 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
3f542974 PS |
1936 | } |
1937 | ||
1938 | } else { | |
9c134a14 | 1939 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
3f542974 PS |
1940 | } |
1941 | ||
880af9db | 1942 | if (cflag & CMSPAR) |
3f542974 | 1943 | lParity = lParity | 0x20; |
3f542974 PS |
1944 | |
1945 | /* Change the Stop bit */ | |
1946 | if (cflag & CSTOPB) { | |
1947 | lStop = LCR_STOP_2; | |
9c134a14 | 1948 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
3f542974 PS |
1949 | } else { |
1950 | lStop = LCR_STOP_1; | |
9c134a14 | 1951 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
3f542974 PS |
1952 | } |
1953 | ||
1954 | /* Update the LCR with the correct value */ | |
1955 | mos7840_port->shadowLCR &= | |
1956 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1957 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
1958 | ||
9c134a14 GKH |
1959 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, |
1960 | mos7840_port->shadowLCR); | |
3f542974 PS |
1961 | /* Disable Interrupts */ |
1962 | Data = 0x00; | |
1963 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1964 | ||
1965 | Data = 0x00; | |
1966 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1967 | ||
1968 | Data = 0xcf; | |
1969 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1970 | ||
1971 | /* Send the updated LCR value to the mos7840 */ | |
1972 | Data = mos7840_port->shadowLCR; | |
1973 | ||
1974 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1975 | ||
1976 | Data = 0x00b; | |
1977 | mos7840_port->shadowMCR = Data; | |
1978 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1979 | Data = 0x00b; | |
1980 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1981 | ||
1982 | /* set up the MCR register and send it to the mos7840 */ | |
1983 | ||
1984 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
880af9db | 1985 | if (cflag & CBAUD) |
3f542974 | 1986 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
3f542974 | 1987 | |
880af9db | 1988 | if (cflag & CRTSCTS) |
3f542974 | 1989 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
880af9db | 1990 | else |
3f542974 | 1991 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
3f542974 PS |
1992 | |
1993 | Data = mos7840_port->shadowMCR; | |
1994 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1995 | ||
1996 | /* Determine divisor based on baud rate */ | |
1997 | baud = tty_get_baud_rate(tty); | |
1998 | ||
1999 | if (!baud) { | |
2000 | /* pick a default, any default... */ | |
9c134a14 | 2001 | dev_dbg(&port->dev, "%s", "Picked default baud...\n"); |
3f542974 PS |
2002 | baud = 9600; |
2003 | } | |
2004 | ||
9c134a14 | 2005 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
3f542974 PS |
2006 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
2007 | ||
2008 | /* Enable Interrupts */ | |
2009 | Data = 0x0c; | |
2010 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2011 | ||
50de36f7 | 2012 | if (mos7840_port->read_urb_busy == false) { |
50de36f7 | 2013 | mos7840_port->read_urb_busy = true; |
3f542974 | 2014 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
3f542974 | 2015 | if (status) { |
9c134a14 | 2016 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", |
3f542974 | 2017 | status); |
50de36f7 | 2018 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2019 | } |
2020 | } | |
9c134a14 GKH |
2021 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, |
2022 | mos7840_port->shadowLCR); | |
3f542974 PS |
2023 | } |
2024 | ||
2025 | /***************************************************************************** | |
2026 | * mos7840_set_termios | |
2027 | * this function is called by the tty driver when it wants to change | |
2028 | * the termios structure | |
2029 | *****************************************************************************/ | |
2030 | ||
95da310e AC |
2031 | static void mos7840_set_termios(struct tty_struct *tty, |
2032 | struct usb_serial_port *port, | |
606d099c | 2033 | struct ktermios *old_termios) |
3f542974 PS |
2034 | { |
2035 | int status; | |
2036 | unsigned int cflag; | |
2037 | struct usb_serial *serial; | |
2038 | struct moschip_port *mos7840_port; | |
3363155b | 2039 | |
9c134a14 | 2040 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 2041 | return; |
3f542974 PS |
2042 | |
2043 | serial = port->serial; | |
2044 | ||
9c134a14 | 2045 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 2046 | return; |
3f542974 PS |
2047 | |
2048 | mos7840_port = mos7840_get_port_private(port); | |
2049 | ||
2050 | if (mos7840_port == NULL) | |
2051 | return; | |
2052 | ||
3f542974 | 2053 | if (!mos7840_port->open) { |
9c134a14 | 2054 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
2055 | return; |
2056 | } | |
2057 | ||
9c134a14 | 2058 | dev_dbg(&port->dev, "%s", "setting termios - \n"); |
3f542974 | 2059 | |
adc8d746 | 2060 | cflag = tty->termios.c_cflag; |
3f542974 | 2061 | |
9c134a14 | 2062 | dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, |
d9a80746 | 2063 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
9c134a14 GKH |
2064 | dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, |
2065 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
2066 | dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); | |
3f542974 PS |
2067 | |
2068 | /* change the port settings to the new ones specified */ | |
2069 | ||
95da310e | 2070 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
3f542974 PS |
2071 | |
2072 | if (!mos7840_port->read_urb) { | |
9c134a14 | 2073 | dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); |
3f542974 PS |
2074 | return; |
2075 | } | |
2076 | ||
50de36f7 | 2077 | if (mos7840_port->read_urb_busy == false) { |
50de36f7 | 2078 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
2079 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
2080 | if (status) { | |
9c134a14 | 2081 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", |
3f542974 | 2082 | status); |
50de36f7 | 2083 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2084 | } |
2085 | } | |
3f542974 PS |
2086 | } |
2087 | ||
2088 | /***************************************************************************** | |
2089 | * mos7840_get_lsr_info - get line status register info | |
2090 | * | |
2091 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2092 | * is emptied. On bus types like RS485, the transmitter must | |
2093 | * release the bus after transmitting. This must be done when | |
2094 | * the transmit shift register is empty, not be done when the | |
2095 | * transmit holding register is empty. This functionality | |
2096 | * allows an RS485 driver to be written in user space. | |
2097 | *****************************************************************************/ | |
2098 | ||
95da310e | 2099 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
97c4965d | 2100 | unsigned int __user *value) |
3f542974 PS |
2101 | { |
2102 | int count; | |
2103 | unsigned int result = 0; | |
2104 | ||
95da310e | 2105 | count = mos7840_chars_in_buffer(tty); |
9c134a14 | 2106 | if (count == 0) |
3f542974 | 2107 | result = TIOCSER_TEMT; |
3f542974 PS |
2108 | |
2109 | if (copy_to_user(value, &result, sizeof(int))) | |
2110 | return -EFAULT; | |
2111 | return 0; | |
2112 | } | |
2113 | ||
3f542974 PS |
2114 | /***************************************************************************** |
2115 | * mos7840_get_serial_info | |
2116 | * function to get information about serial port | |
2117 | *****************************************************************************/ | |
2118 | ||
2119 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
97c4965d | 2120 | struct serial_struct __user *retinfo) |
3f542974 PS |
2121 | { |
2122 | struct serial_struct tmp; | |
2123 | ||
2124 | if (mos7840_port == NULL) | |
2125 | return -1; | |
2126 | ||
2127 | if (!retinfo) | |
2128 | return -EFAULT; | |
2129 | ||
2130 | memset(&tmp, 0, sizeof(tmp)); | |
2131 | ||
2132 | tmp.type = PORT_16550A; | |
2133 | tmp.line = mos7840_port->port->serial->minor; | |
2134 | tmp.port = mos7840_port->port->number; | |
2135 | tmp.irq = 0; | |
2136 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2137 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2138 | tmp.baud_base = 9600; | |
2139 | tmp.close_delay = 5 * HZ; | |
2140 | tmp.closing_wait = 30 * HZ; | |
2141 | ||
2142 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2143 | return -EFAULT; | |
2144 | return 0; | |
2145 | } | |
2146 | ||
0bca1b91 AC |
2147 | static int mos7840_get_icount(struct tty_struct *tty, |
2148 | struct serial_icounter_struct *icount) | |
2149 | { | |
2150 | struct usb_serial_port *port = tty->driver_data; | |
2151 | struct moschip_port *mos7840_port; | |
2152 | struct async_icount cnow; | |
2153 | ||
2154 | mos7840_port = mos7840_get_port_private(port); | |
2155 | cnow = mos7840_port->icount; | |
2156 | ||
2157 | smp_rmb(); | |
2158 | icount->cts = cnow.cts; | |
2159 | icount->dsr = cnow.dsr; | |
2160 | icount->rng = cnow.rng; | |
2161 | icount->dcd = cnow.dcd; | |
2162 | icount->rx = cnow.rx; | |
2163 | icount->tx = cnow.tx; | |
2164 | icount->frame = cnow.frame; | |
2165 | icount->overrun = cnow.overrun; | |
2166 | icount->parity = cnow.parity; | |
2167 | icount->brk = cnow.brk; | |
2168 | icount->buf_overrun = cnow.buf_overrun; | |
2169 | ||
9c134a14 GKH |
2170 | dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__, |
2171 | icount->rx, icount->tx); | |
0bca1b91 AC |
2172 | return 0; |
2173 | } | |
2174 | ||
3f542974 PS |
2175 | /***************************************************************************** |
2176 | * SerialIoctl | |
2177 | * this function handles any ioctl calls to the driver | |
2178 | *****************************************************************************/ | |
2179 | ||
00a0d0d6 | 2180 | static int mos7840_ioctl(struct tty_struct *tty, |
3f542974 PS |
2181 | unsigned int cmd, unsigned long arg) |
2182 | { | |
95da310e | 2183 | struct usb_serial_port *port = tty->driver_data; |
97c4965d | 2184 | void __user *argp = (void __user *)arg; |
3f542974 | 2185 | struct moschip_port *mos7840_port; |
3f542974 PS |
2186 | |
2187 | struct async_icount cnow; | |
2188 | struct async_icount cprev; | |
3f542974 | 2189 | |
9c134a14 | 2190 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 2191 | return -1; |
3f542974 PS |
2192 | |
2193 | mos7840_port = mos7840_get_port_private(port); | |
3f542974 PS |
2194 | |
2195 | if (mos7840_port == NULL) | |
2196 | return -1; | |
2197 | ||
9c134a14 | 2198 | dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); |
3f542974 PS |
2199 | |
2200 | switch (cmd) { | |
2201 | /* return number of bytes available */ | |
2202 | ||
3f542974 | 2203 | case TIOCSERGETLSR: |
9c134a14 | 2204 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
95da310e | 2205 | return mos7840_get_lsr_info(tty, argp); |
3f542974 | 2206 | |
3f542974 | 2207 | case TIOCGSERIAL: |
9c134a14 | 2208 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
97c4965d | 2209 | return mos7840_get_serial_info(mos7840_port, argp); |
3f542974 PS |
2210 | |
2211 | case TIOCSSERIAL: | |
9c134a14 | 2212 | dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); |
3f542974 PS |
2213 | break; |
2214 | ||
2215 | case TIOCMIWAIT: | |
9c134a14 | 2216 | dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__); |
3f542974 PS |
2217 | cprev = mos7840_port->icount; |
2218 | while (1) { | |
880af9db | 2219 | /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
3f542974 | 2220 | mos7840_port->delta_msr_cond = 0; |
a14430db JH |
2221 | wait_event_interruptible(port->delta_msr_wait, |
2222 | (port->serial->disconnected || | |
2223 | mos7840_port-> | |
3f542974 PS |
2224 | delta_msr_cond == 1)); |
2225 | ||
2226 | /* see if a signal did it */ | |
2227 | if (signal_pending(current)) | |
2228 | return -ERESTARTSYS; | |
a14430db JH |
2229 | |
2230 | if (port->serial->disconnected) | |
2231 | return -EIO; | |
2232 | ||
3f542974 | 2233 | cnow = mos7840_port->icount; |
0de9a702 | 2234 | smp_rmb(); |
3f542974 PS |
2235 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
2236 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2237 | return -EIO; /* no change => error */ | |
2238 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2239 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2240 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
2241 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
2242 | return 0; | |
2243 | } | |
2244 | cprev = cnow; | |
2245 | } | |
2246 | /* NOTREACHED */ | |
2247 | break; | |
2248 | ||
3f542974 PS |
2249 | default: |
2250 | break; | |
2251 | } | |
3f542974 PS |
2252 | return -ENOIOCTLCMD; |
2253 | } | |
2254 | ||
0eafe4de D |
2255 | static int mos7810_check(struct usb_serial *serial) |
2256 | { | |
2257 | int i, pass_count = 0; | |
2258 | __u16 data = 0, mcr_data = 0; | |
2259 | __u16 test_pattern = 0x55AA; | |
2260 | ||
2261 | /* Store MCR setting */ | |
2262 | usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
2263 | MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, | |
2264 | &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); | |
2265 | ||
2266 | for (i = 0; i < 16; i++) { | |
2267 | /* Send the 1-bit test pattern out to MCS7810 test pin */ | |
2268 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
2269 | MCS_WRREQ, MCS_WR_RTYPE, | |
2270 | (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), | |
2271 | MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); | |
2272 | ||
2273 | /* Read the test pattern back */ | |
2274 | usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
2275 | MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, | |
2276 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); | |
2277 | ||
2278 | /* If this is a MCS7810 device, both test patterns must match */ | |
2279 | if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) | |
2280 | break; | |
2281 | ||
2282 | pass_count++; | |
2283 | } | |
2284 | ||
2285 | /* Restore MCR setting */ | |
2286 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, | |
2287 | MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, | |
2288 | 0, MOS_WDR_TIMEOUT); | |
2289 | ||
2290 | if (pass_count == 16) | |
2291 | return 1; | |
2292 | ||
2293 | return 0; | |
2294 | } | |
2295 | ||
3f542974 PS |
2296 | static int mos7840_calc_num_ports(struct usb_serial *serial) |
2297 | { | |
0eafe4de | 2298 | __u16 data = 0x00; |
093ea2d3 DL |
2299 | int mos7840_num_ports; |
2300 | ||
0eafe4de D |
2301 | usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
2302 | MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, | |
093ea2d3 DL |
2303 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); |
2304 | ||
0eafe4de D |
2305 | if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || |
2306 | serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { | |
2307 | device_type = serial->dev->descriptor.idProduct; | |
093ea2d3 | 2308 | } else { |
0eafe4de D |
2309 | /* For a MCS7840 device GPIO0 must be set to 1 */ |
2310 | if ((data & 0x01) == 1) | |
2311 | device_type = MOSCHIP_DEVICE_ID_7840; | |
2312 | else if (mos7810_check(serial)) | |
2313 | device_type = MOSCHIP_DEVICE_ID_7810; | |
2314 | else | |
2315 | device_type = MOSCHIP_DEVICE_ID_7820; | |
3f542974 | 2316 | } |
093ea2d3 | 2317 | |
0eafe4de D |
2318 | mos7840_num_ports = (device_type >> 4) & 0x000F; |
2319 | serial->num_bulk_in = mos7840_num_ports; | |
2320 | serial->num_bulk_out = mos7840_num_ports; | |
2321 | serial->num_ports = mos7840_num_ports; | |
2322 | ||
3f542974 PS |
2323 | return mos7840_num_ports; |
2324 | } | |
2325 | ||
80c00750 | 2326 | static int mos7840_port_probe(struct usb_serial_port *port) |
3f542974 | 2327 | { |
80c00750 | 2328 | struct usb_serial *serial = port->serial; |
3f542974 | 2329 | struct moschip_port *mos7840_port; |
80c00750 JH |
2330 | int status; |
2331 | int pnum; | |
3f542974 | 2332 | __u16 Data; |
3f542974 | 2333 | |
3f542974 PS |
2334 | /* we set up the pointers to the endpoints in the mos7840_open * |
2335 | * function, as the structures aren't created yet. */ | |
2336 | ||
80c00750 JH |
2337 | pnum = port->number - serial->minor; |
2338 | ||
ae685eff JH |
2339 | dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); |
2340 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
2341 | if (mos7840_port == NULL) { | |
2342 | dev_err(&port->dev, "%s - Out of memory\n", __func__); | |
2343 | return -ENOMEM; | |
2344 | } | |
3f542974 | 2345 | |
ae685eff JH |
2346 | /* Initialize all port interrupt end point to port 0 int |
2347 | * endpoint. Our device has only one interrupt end point | |
2348 | * common to all port */ | |
2349 | ||
2350 | mos7840_port->port = port; | |
2351 | mos7840_set_port_private(port, mos7840_port); | |
2352 | spin_lock_init(&mos7840_port->pool_lock); | |
2353 | ||
2354 | /* minor is not initialised until later by | |
2355 | * usb-serial.c:get_free_serial() and cannot therefore be used | |
2356 | * to index device instances */ | |
2357 | mos7840_port->port_num = pnum + 1; | |
2358 | dev_dbg(&port->dev, "port->number = %d\n", port->number); | |
2359 | dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor); | |
2360 | dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); | |
2361 | dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor); | |
2362 | ||
2363 | if (mos7840_port->port_num == 1) { | |
2364 | mos7840_port->SpRegOffset = 0x0; | |
2365 | mos7840_port->ControlRegOffset = 0x1; | |
2366 | mos7840_port->DcrRegOffset = 0x4; | |
2367 | } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { | |
2368 | mos7840_port->SpRegOffset = 0x8; | |
2369 | mos7840_port->ControlRegOffset = 0x9; | |
2370 | mos7840_port->DcrRegOffset = 0x16; | |
2371 | } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { | |
2372 | mos7840_port->SpRegOffset = 0xa; | |
2373 | mos7840_port->ControlRegOffset = 0xb; | |
2374 | mos7840_port->DcrRegOffset = 0x19; | |
2375 | } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { | |
2376 | mos7840_port->SpRegOffset = 0xa; | |
2377 | mos7840_port->ControlRegOffset = 0xb; | |
2378 | mos7840_port->DcrRegOffset = 0x19; | |
2379 | } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { | |
2380 | mos7840_port->SpRegOffset = 0xc; | |
2381 | mos7840_port->ControlRegOffset = 0xd; | |
2382 | mos7840_port->DcrRegOffset = 0x1c; | |
2383 | } | |
2384 | mos7840_dump_serial_port(port, mos7840_port); | |
2385 | mos7840_set_port_private(port, mos7840_port); | |
2386 | ||
2387 | /* enable rx_disable bit in control register */ | |
2388 | status = mos7840_get_reg_sync(port, | |
2389 | mos7840_port->ControlRegOffset, &Data); | |
2390 | if (status < 0) { | |
2391 | dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); | |
2392 | goto out; | |
2393 | } else | |
2394 | dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); | |
2395 | Data |= 0x08; /* setting driver done bit */ | |
2396 | Data |= 0x04; /* sp1_bit to have cts change reflect in | |
2397 | modem status reg */ | |
2398 | ||
2399 | /* Data |= 0x20; //rx_disable bit */ | |
2400 | status = mos7840_set_reg_sync(port, | |
2401 | mos7840_port->ControlRegOffset, Data); | |
2402 | if (status < 0) { | |
2403 | dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); | |
2404 | goto out; | |
2405 | } else | |
2406 | dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); | |
2407 | ||
2408 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 | |
2409 | and 0x24 in DCR3 */ | |
2410 | Data = 0x01; | |
2411 | status = mos7840_set_reg_sync(port, | |
2412 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); | |
2413 | if (status < 0) { | |
2414 | dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); | |
2415 | goto out; | |
2416 | } else | |
2417 | dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); | |
3f542974 | 2418 | |
ae685eff JH |
2419 | Data = 0x05; |
2420 | status = mos7840_set_reg_sync(port, | |
2421 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); | |
2422 | if (status < 0) { | |
2423 | dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); | |
2424 | goto out; | |
2425 | } else | |
2426 | dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); | |
3f542974 | 2427 | |
ae685eff JH |
2428 | Data = 0x24; |
2429 | status = mos7840_set_reg_sync(port, | |
2430 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); | |
2431 | if (status < 0) { | |
2432 | dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); | |
2433 | goto out; | |
2434 | } else | |
2435 | dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); | |
3f542974 | 2436 | |
ae685eff JH |
2437 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
2438 | Data = 0x0; | |
2439 | status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); | |
2440 | if (status < 0) { | |
2441 | dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); | |
2442 | goto out; | |
2443 | } else | |
2444 | dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); | |
3f542974 | 2445 | |
ae685eff JH |
2446 | Data = 0x20; |
2447 | status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); | |
2448 | if (status < 0) { | |
2449 | dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); | |
2450 | goto error; | |
2451 | } else | |
2452 | dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); | |
3f542974 | 2453 | |
ae685eff JH |
2454 | /* write value 0x0 to scratchpad register */ |
2455 | Data = 0x00; | |
2456 | status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); | |
2457 | if (status < 0) { | |
2458 | dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); | |
2459 | goto out; | |
2460 | } else | |
2461 | dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); | |
2462 | ||
2463 | /* Zero Length flag register */ | |
2464 | if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { | |
2465 | Data = 0xff; | |
80c00750 | 2466 | status = mos7840_set_reg_sync(port, |
ae685eff JH |
2467 | (__u16) (ZLP_REG1 + |
2468 | ((__u16)mos7840_port->port_num)), Data); | |
2469 | dev_dbg(&port->dev, "ZLIP offset %x\n", | |
2470 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); | |
3f542974 | 2471 | if (status < 0) { |
ae685eff JH |
2472 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); |
2473 | goto out; | |
3f542974 | 2474 | } else |
ae685eff JH |
2475 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); |
2476 | } else { | |
2477 | Data = 0xff; | |
80c00750 | 2478 | status = mos7840_set_reg_sync(port, |
ae685eff JH |
2479 | (__u16) (ZLP_REG1 + |
2480 | ((__u16)mos7840_port->port_num) - 0x1), Data); | |
2481 | dev_dbg(&port->dev, "ZLIP offset %x\n", | |
2482 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); | |
3f542974 | 2483 | if (status < 0) { |
ae685eff JH |
2484 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); |
2485 | goto out; | |
3f542974 | 2486 | } else |
ae685eff | 2487 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); |
3f542974 | 2488 | |
ae685eff JH |
2489 | } |
2490 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2491 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); | |
2492 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), | |
2493 | GFP_KERNEL); | |
2494 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || | |
2495 | !mos7840_port->dr) { | |
2496 | status = -ENOMEM; | |
2497 | goto error; | |
2498 | } | |
0eafe4de | 2499 | |
ae685eff | 2500 | mos7840_port->has_led = false; |
0eafe4de | 2501 | |
ae685eff JH |
2502 | /* Initialize LED timers */ |
2503 | if (device_type == MOSCHIP_DEVICE_ID_7810) { | |
2504 | mos7840_port->has_led = true; | |
0eafe4de | 2505 | |
ae685eff JH |
2506 | init_timer(&mos7840_port->led_timer1); |
2507 | mos7840_port->led_timer1.function = mos7840_led_off; | |
2508 | mos7840_port->led_timer1.expires = | |
2509 | jiffies + msecs_to_jiffies(LED_ON_MS); | |
2510 | mos7840_port->led_timer1.data = (unsigned long)mos7840_port; | |
0eafe4de | 2511 | |
ae685eff JH |
2512 | init_timer(&mos7840_port->led_timer2); |
2513 | mos7840_port->led_timer2.function = mos7840_led_flag_off; | |
2514 | mos7840_port->led_timer2.expires = | |
2515 | jiffies + msecs_to_jiffies(LED_OFF_MS); | |
2516 | mos7840_port->led_timer2.data = (unsigned long)mos7840_port; | |
0eafe4de | 2517 | |
ae685eff | 2518 | mos7840_port->led_flag = false; |
3f542974 | 2519 | |
ae685eff JH |
2520 | /* Turn off LED */ |
2521 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); | |
2522 | } | |
2523 | out: | |
80c00750 JH |
2524 | if (pnum == serial->num_ports - 1) { |
2525 | /* Zero Length flag enable */ | |
2526 | Data = 0x0f; | |
2527 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); | |
2528 | if (status < 0) { | |
2529 | dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); | |
2530 | goto error; | |
2531 | } else | |
2532 | dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); | |
2533 | ||
2534 | /* setting configuration feature to one */ | |
2535 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
2536 | 0x03, 0x00, 0x01, 0x00, NULL, 0x00, | |
2537 | MOS_WDR_TIMEOUT); | |
2538 | } | |
3f542974 | 2539 | return 0; |
0de9a702 | 2540 | error: |
80c00750 JH |
2541 | kfree(mos7840_port->dr); |
2542 | kfree(mos7840_port->ctrl_buf); | |
2543 | usb_free_urb(mos7840_port->control_urb); | |
2544 | kfree(mos7840_port); | |
0de9a702 | 2545 | |
0de9a702 | 2546 | return status; |
3f542974 PS |
2547 | } |
2548 | ||
80c00750 | 2549 | static int mos7840_port_remove(struct usb_serial_port *port) |
3f542974 | 2550 | { |
3f542974 | 2551 | struct moschip_port *mos7840_port; |
3f542974 | 2552 | |
80c00750 | 2553 | mos7840_port = mos7840_get_port_private(port); |
3f542974 | 2554 | |
80c00750 JH |
2555 | if (mos7840_port->has_led) { |
2556 | /* Turn off LED */ | |
2557 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); | |
3f542974 | 2558 | |
80c00750 JH |
2559 | del_timer_sync(&mos7840_port->led_timer1); |
2560 | del_timer_sync(&mos7840_port->led_timer2); | |
f9c99bb8 | 2561 | } |
80c00750 JH |
2562 | usb_kill_urb(mos7840_port->control_urb); |
2563 | usb_free_urb(mos7840_port->control_urb); | |
2564 | kfree(mos7840_port->ctrl_buf); | |
2565 | kfree(mos7840_port->dr); | |
2566 | kfree(mos7840_port); | |
f9c99bb8 | 2567 | |
80c00750 | 2568 | return 0; |
3f542974 PS |
2569 | } |
2570 | ||
2571 | static struct usb_serial_driver moschip7840_4port_device = { | |
2572 | .driver = { | |
2573 | .owner = THIS_MODULE, | |
2574 | .name = "mos7840", | |
2575 | }, | |
2576 | .description = DRIVER_DESC, | |
68e24113 | 2577 | .id_table = id_table, |
3f542974 | 2578 | .num_ports = 4, |
3f542974 PS |
2579 | .open = mos7840_open, |
2580 | .close = mos7840_close, | |
2581 | .write = mos7840_write, | |
2582 | .write_room = mos7840_write_room, | |
2583 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2584 | .throttle = mos7840_throttle, | |
2585 | .unthrottle = mos7840_unthrottle, | |
2586 | .calc_num_ports = mos7840_calc_num_ports, | |
2587 | #ifdef MCSSerialProbe | |
2588 | .probe = mos7840_serial_probe, | |
2589 | #endif | |
2590 | .ioctl = mos7840_ioctl, | |
2591 | .set_termios = mos7840_set_termios, | |
2592 | .break_ctl = mos7840_break, | |
2593 | .tiocmget = mos7840_tiocmget, | |
2594 | .tiocmset = mos7840_tiocmset, | |
0bca1b91 | 2595 | .get_icount = mos7840_get_icount, |
80c00750 JH |
2596 | .port_probe = mos7840_port_probe, |
2597 | .port_remove = mos7840_port_remove, | |
3f542974 PS |
2598 | .read_bulk_callback = mos7840_bulk_in_callback, |
2599 | .read_int_callback = mos7840_interrupt_callback, | |
2600 | }; | |
2601 | ||
4d2a7aff AS |
2602 | static struct usb_serial_driver * const serial_drivers[] = { |
2603 | &moschip7840_4port_device, NULL | |
2604 | }; | |
2605 | ||
68e24113 | 2606 | module_usb_serial_driver(serial_drivers, id_table); |
3f542974 | 2607 | |
3f542974 PS |
2608 | MODULE_DESCRIPTION(DRIVER_DESC); |
2609 | MODULE_LICENSE("GPL"); |