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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 | ||
d614a64a JH |
186 | enum mos7840_flag { |
187 | MOS7840_FLAG_CTRL_BUSY, | |
62a2cfc2 | 188 | MOS7840_FLAG_LED_BUSY, |
d614a64a JH |
189 | }; |
190 | ||
b9c87663 | 191 | static const struct usb_device_id id_table[] = { |
3f542974 PS |
192 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
193 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
0eafe4de | 194 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, |
acf509ae | 195 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, |
870408c8 | 196 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, |
acf509ae | 197 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, |
870408c8 | 198 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, |
acf509ae CB |
199 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, |
200 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, | |
201 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, | |
202 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, | |
11e1abb4 | 203 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
870408c8 | 204 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, |
acf509ae | 205 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
870408c8 | 206 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, |
27f1281d | 207 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, |
e9b8cffa | 208 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
9d498bea | 209 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, |
3f542974 PS |
210 | {} /* terminating entry */ |
211 | }; | |
68e24113 | 212 | MODULE_DEVICE_TABLE(usb, id_table); |
3f542974 PS |
213 | |
214 | /* This structure holds all of the local port information */ | |
215 | ||
216 | struct moschip_port { | |
217 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
218 | struct urb *write_urb; /* write URB for this port */ | |
219 | struct urb *read_urb; /* read URB for this port */ | |
220 | __u8 shadowLCR; /* last LCR value received */ | |
221 | __u8 shadowMCR; /* last MCR value received */ | |
222 | char open; | |
0de9a702 | 223 | char open_ports; |
3f542974 | 224 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
3f542974 PS |
225 | struct usb_serial_port *port; /* loop back to the owner of this object */ |
226 | ||
880af9db | 227 | /* Offsets */ |
3f542974 PS |
228 | __u8 SpRegOffset; |
229 | __u8 ControlRegOffset; | |
230 | __u8 DcrRegOffset; | |
880af9db | 231 | /* for processing control URBS in interrupt context */ |
3f542974 | 232 | struct urb *control_urb; |
0de9a702 | 233 | struct usb_ctrlrequest *dr; |
3f542974 PS |
234 | char *ctrl_buf; |
235 | int MsrLsr; | |
236 | ||
0de9a702 | 237 | spinlock_t pool_lock; |
3f542974 | 238 | struct urb *write_urb_pool[NUM_URBS]; |
0de9a702 | 239 | char busy[NUM_URBS]; |
50de36f7 | 240 | bool read_urb_busy; |
3f542974 | 241 | |
0eafe4de D |
242 | /* For device(s) with LED indicator */ |
243 | bool has_led; | |
0eafe4de D |
244 | struct timer_list led_timer1; /* Timer for LED on */ |
245 | struct timer_list led_timer2; /* Timer for LED off */ | |
62a2cfc2 JH |
246 | struct urb *led_urb; |
247 | struct usb_ctrlrequest *led_dr; | |
d614a64a JH |
248 | |
249 | unsigned long flags; | |
0eafe4de | 250 | }; |
3f542974 | 251 | |
3f542974 PS |
252 | /* |
253 | * mos7840_set_reg_sync | |
254 | * To set the Control register by calling usb_fill_control_urb function | |
255 | * by passing usb_sndctrlpipe function as parameter. | |
256 | */ | |
257 | ||
258 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
259 | __u16 val) | |
260 | { | |
261 | struct usb_device *dev = port->serial->dev; | |
262 | val = val & 0x00ff; | |
9c134a14 | 263 | dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); |
3f542974 PS |
264 | |
265 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
266 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
267 | MOS_WDR_TIMEOUT); | |
268 | } | |
269 | ||
270 | /* | |
271 | * mos7840_get_reg_sync | |
272 | * To set the Uart register by calling usb_fill_control_urb function by | |
273 | * passing usb_rcvctrlpipe function as parameter. | |
274 | */ | |
275 | ||
276 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
880af9db | 277 | __u16 *val) |
3f542974 PS |
278 | { |
279 | struct usb_device *dev = port->serial->dev; | |
280 | int ret = 0; | |
9e221a35 JH |
281 | u8 *buf; |
282 | ||
283 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
284 | if (!buf) | |
285 | return -ENOMEM; | |
3f542974 PS |
286 | |
287 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
9e221a35 | 288 | MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 289 | MOS_WDR_TIMEOUT); |
9e221a35 | 290 | *val = buf[0]; |
9c134a14 | 291 | dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); |
9e221a35 JH |
292 | |
293 | kfree(buf); | |
3f542974 PS |
294 | return ret; |
295 | } | |
296 | ||
297 | /* | |
298 | * mos7840_set_uart_reg | |
299 | * To set the Uart register by calling usb_fill_control_urb function by | |
300 | * passing usb_sndctrlpipe function as parameter. | |
301 | */ | |
302 | ||
303 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
304 | __u16 val) | |
305 | { | |
306 | ||
307 | struct usb_device *dev = port->serial->dev; | |
308 | val = val & 0x00ff; | |
880af9db AC |
309 | /* For the UART control registers, the application number need |
310 | to be Or'ed */ | |
0de9a702 | 311 | if (port->serial->num_ports == 4) { |
880af9db AC |
312 | val |= (((__u16) port->number - |
313 | (__u16) (port->serial->minor)) + 1) << 8; | |
3f542974 PS |
314 | } else { |
315 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 316 | val |= (((__u16) port->number - |
3f542974 | 317 | (__u16) (port->serial->minor)) + 1) << 8; |
3f542974 | 318 | } else { |
9c134a14 | 319 | val |= (((__u16) port->number - |
3f542974 | 320 | (__u16) (port->serial->minor)) + 2) << 8; |
3f542974 PS |
321 | } |
322 | } | |
9c134a14 | 323 | dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); |
3f542974 PS |
324 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
325 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
326 | MOS_WDR_TIMEOUT); | |
327 | ||
328 | } | |
329 | ||
330 | /* | |
331 | * mos7840_get_uart_reg | |
332 | * To set the Control register by calling usb_fill_control_urb function | |
333 | * by passing usb_rcvctrlpipe function as parameter. | |
334 | */ | |
335 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
880af9db | 336 | __u16 *val) |
3f542974 PS |
337 | { |
338 | struct usb_device *dev = port->serial->dev; | |
339 | int ret = 0; | |
340 | __u16 Wval; | |
9e221a35 JH |
341 | u8 *buf; |
342 | ||
343 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
344 | if (!buf) | |
345 | return -ENOMEM; | |
3f542974 | 346 | |
880af9db | 347 | /* Wval is same as application number */ |
0de9a702 | 348 | if (port->serial->num_ports == 4) { |
3f542974 PS |
349 | Wval = |
350 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
351 | 1) << 8; | |
3f542974 PS |
352 | } else { |
353 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
880af9db | 354 | Wval = (((__u16) port->number - |
3f542974 | 355 | (__u16) (port->serial->minor)) + 1) << 8; |
3f542974 | 356 | } else { |
880af9db | 357 | Wval = (((__u16) port->number - |
3f542974 | 358 | (__u16) (port->serial->minor)) + 2) << 8; |
3f542974 PS |
359 | } |
360 | } | |
9c134a14 | 361 | dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); |
3f542974 | 362 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
9e221a35 | 363 | MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, |
3f542974 | 364 | MOS_WDR_TIMEOUT); |
9e221a35 JH |
365 | *val = buf[0]; |
366 | ||
367 | kfree(buf); | |
3f542974 PS |
368 | return ret; |
369 | } | |
370 | ||
9c134a14 GKH |
371 | static void mos7840_dump_serial_port(struct usb_serial_port *port, |
372 | struct moschip_port *mos7840_port) | |
3f542974 PS |
373 | { |
374 | ||
9c134a14 GKH |
375 | dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); |
376 | dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); | |
377 | dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); | |
3f542974 PS |
378 | |
379 | } | |
380 | ||
381 | /************************************************************************/ | |
382 | /************************************************************************/ | |
383 | /* I N T E R F A C E F U N C T I O N S */ | |
384 | /* I N T E R F A C E F U N C T I O N S */ | |
385 | /************************************************************************/ | |
386 | /************************************************************************/ | |
387 | ||
388 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
389 | struct moschip_port *data) | |
390 | { | |
391 | usb_set_serial_port_data(port, (void *)data); | |
392 | } | |
393 | ||
394 | static inline struct moschip_port *mos7840_get_port_private(struct | |
395 | usb_serial_port | |
396 | *port) | |
397 | { | |
398 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
399 | } | |
400 | ||
0de9a702 | 401 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
3f542974 PS |
402 | { |
403 | struct moschip_port *mos7840_port; | |
404 | struct async_icount *icount; | |
405 | mos7840_port = port; | |
3f542974 PS |
406 | if (new_msr & |
407 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
408 | MOS_MSR_DELTA_CD)) { | |
8c1a07ff | 409 | icount = &mos7840_port->port->icount; |
3f542974 PS |
410 | |
411 | /* update input line counters */ | |
c9fac853 | 412 | if (new_msr & MOS_MSR_DELTA_CTS) |
3f542974 | 413 | icount->cts++; |
c9fac853 | 414 | if (new_msr & MOS_MSR_DELTA_DSR) |
3f542974 | 415 | icount->dsr++; |
c9fac853 | 416 | if (new_msr & MOS_MSR_DELTA_CD) |
3f542974 | 417 | icount->dcd++; |
c9fac853 | 418 | if (new_msr & MOS_MSR_DELTA_RI) |
3f542974 | 419 | icount->rng++; |
e670c6af | 420 | |
0c613371 | 421 | wake_up_interruptible(&port->port->port.delta_msr_wait); |
3f542974 | 422 | } |
3f542974 PS |
423 | } |
424 | ||
0de9a702 | 425 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
3f542974 PS |
426 | { |
427 | struct async_icount *icount; | |
428 | ||
3f542974 | 429 | if (new_lsr & SERIAL_LSR_BI) { |
880af9db AC |
430 | /* |
431 | * Parity and Framing errors only count if they | |
432 | * occur exclusive of a break being | |
433 | * received. | |
434 | */ | |
3f542974 PS |
435 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
436 | } | |
437 | ||
438 | /* update input line counters */ | |
8c1a07ff | 439 | icount = &port->port->icount; |
c9fac853 | 440 | if (new_lsr & SERIAL_LSR_BI) |
3f542974 | 441 | icount->brk++; |
c9fac853 | 442 | if (new_lsr & SERIAL_LSR_OE) |
3f542974 | 443 | icount->overrun++; |
c9fac853 | 444 | if (new_lsr & SERIAL_LSR_PE) |
3f542974 | 445 | icount->parity++; |
c9fac853 | 446 | if (new_lsr & SERIAL_LSR_FE) |
3f542974 | 447 | icount->frame++; |
3f542974 PS |
448 | } |
449 | ||
450 | /************************************************************************/ | |
451 | /************************************************************************/ | |
452 | /* U S B C A L L B A C K F U N C T I O N S */ | |
453 | /* U S B C A L L B A C K F U N C T I O N S */ | |
454 | /************************************************************************/ | |
455 | /************************************************************************/ | |
456 | ||
7d12e780 | 457 | static void mos7840_control_callback(struct urb *urb) |
3f542974 PS |
458 | { |
459 | unsigned char *data; | |
460 | struct moschip_port *mos7840_port; | |
9c134a14 | 461 | struct device *dev = &urb->dev->dev; |
3f542974 | 462 | __u8 regval = 0x0; |
0643c724 | 463 | int status = urb->status; |
3f542974 | 464 | |
cdc97792 | 465 | mos7840_port = urb->context; |
0de9a702 | 466 | |
0643c724 | 467 | switch (status) { |
3f542974 PS |
468 | case 0: |
469 | /* success */ | |
470 | break; | |
471 | case -ECONNRESET: | |
472 | case -ENOENT: | |
473 | case -ESHUTDOWN: | |
474 | /* this urb is terminated, clean up */ | |
9c134a14 | 475 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); |
d614a64a | 476 | goto out; |
3f542974 | 477 | default: |
9c134a14 | 478 | dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); |
d614a64a | 479 | goto out; |
3f542974 PS |
480 | } |
481 | ||
9c134a14 GKH |
482 | dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); |
483 | dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, | |
484 | mos7840_port->MsrLsr, mos7840_port->port_num); | |
3f542974 PS |
485 | data = urb->transfer_buffer; |
486 | regval = (__u8) data[0]; | |
9c134a14 | 487 | dev_dbg(dev, "%s data is %x\n", __func__, regval); |
3f542974 PS |
488 | if (mos7840_port->MsrLsr == 0) |
489 | mos7840_handle_new_msr(mos7840_port, regval); | |
490 | else if (mos7840_port->MsrLsr == 1) | |
491 | mos7840_handle_new_lsr(mos7840_port, regval); | |
d614a64a JH |
492 | out: |
493 | clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); | |
3f542974 PS |
494 | } |
495 | ||
496 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
880af9db | 497 | __u16 *val) |
3f542974 PS |
498 | { |
499 | struct usb_device *dev = mcs->port->serial->dev; | |
0de9a702 ON |
500 | struct usb_ctrlrequest *dr = mcs->dr; |
501 | unsigned char *buffer = mcs->ctrl_buf; | |
502 | int ret; | |
3f542974 | 503 | |
d614a64a JH |
504 | if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) |
505 | return -EBUSY; | |
506 | ||
3f542974 PS |
507 | dr->bRequestType = MCS_RD_RTYPE; |
508 | dr->bRequest = MCS_RDREQ; | |
880af9db | 509 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
3f542974 PS |
510 | dr->wIndex = cpu_to_le16(reg); |
511 | dr->wLength = cpu_to_le16(2); | |
512 | ||
513 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
514 | (unsigned char *)dr, buffer, 2, | |
515 | mos7840_control_callback, mcs); | |
516 | mcs->control_urb->transfer_buffer_length = 2; | |
517 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
d614a64a JH |
518 | if (ret) |
519 | clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); | |
520 | ||
3f542974 PS |
521 | return ret; |
522 | } | |
523 | ||
0eafe4de D |
524 | static void mos7840_set_led_callback(struct urb *urb) |
525 | { | |
526 | switch (urb->status) { | |
527 | case 0: | |
528 | /* Success */ | |
529 | break; | |
530 | case -ECONNRESET: | |
531 | case -ENOENT: | |
532 | case -ESHUTDOWN: | |
533 | /* This urb is terminated, clean up */ | |
9c134a14 GKH |
534 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", |
535 | __func__, urb->status); | |
0eafe4de D |
536 | break; |
537 | default: | |
9c134a14 GKH |
538 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", |
539 | __func__, urb->status); | |
0eafe4de D |
540 | } |
541 | } | |
542 | ||
543 | static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, | |
544 | __u16 reg) | |
545 | { | |
546 | struct usb_device *dev = mcs->port->serial->dev; | |
62a2cfc2 | 547 | struct usb_ctrlrequest *dr = mcs->led_dr; |
0eafe4de D |
548 | |
549 | dr->bRequestType = MCS_WR_RTYPE; | |
550 | dr->bRequest = MCS_WRREQ; | |
551 | dr->wValue = cpu_to_le16(wval); | |
552 | dr->wIndex = cpu_to_le16(reg); | |
553 | dr->wLength = cpu_to_le16(0); | |
554 | ||
62a2cfc2 | 555 | usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), |
0eafe4de D |
556 | (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); |
557 | ||
62a2cfc2 | 558 | usb_submit_urb(mcs->led_urb, GFP_ATOMIC); |
0eafe4de D |
559 | } |
560 | ||
561 | static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, | |
562 | __u16 val) | |
563 | { | |
564 | struct usb_device *dev = port->serial->dev; | |
565 | ||
566 | usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, | |
567 | val, reg, NULL, 0, MOS_WDR_TIMEOUT); | |
568 | } | |
569 | ||
570 | static void mos7840_led_off(unsigned long arg) | |
571 | { | |
572 | struct moschip_port *mcs = (struct moschip_port *) arg; | |
573 | ||
574 | /* Turn off LED */ | |
575 | mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); | |
576 | mod_timer(&mcs->led_timer2, | |
577 | jiffies + msecs_to_jiffies(LED_OFF_MS)); | |
578 | } | |
579 | ||
580 | static void mos7840_led_flag_off(unsigned long arg) | |
581 | { | |
582 | struct moschip_port *mcs = (struct moschip_port *) arg; | |
583 | ||
62a2cfc2 JH |
584 | clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); |
585 | } | |
586 | ||
587 | static void mos7840_led_activity(struct usb_serial_port *port) | |
588 | { | |
589 | struct moschip_port *mos7840_port = usb_get_serial_port_data(port); | |
590 | ||
591 | if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) | |
592 | return; | |
593 | ||
594 | mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); | |
595 | mod_timer(&mos7840_port->led_timer1, | |
596 | jiffies + msecs_to_jiffies(LED_ON_MS)); | |
0eafe4de D |
597 | } |
598 | ||
3f542974 PS |
599 | /***************************************************************************** |
600 | * mos7840_interrupt_callback | |
601 | * this is the callback function for when we have received data on the | |
602 | * interrupt endpoint. | |
603 | *****************************************************************************/ | |
604 | ||
7d12e780 | 605 | static void mos7840_interrupt_callback(struct urb *urb) |
3f542974 PS |
606 | { |
607 | int result; | |
608 | int length; | |
609 | struct moschip_port *mos7840_port; | |
610 | struct usb_serial *serial; | |
611 | __u16 Data; | |
612 | unsigned char *data; | |
613 | __u8 sp[5], st; | |
0de9a702 ON |
614 | int i, rv = 0; |
615 | __u16 wval, wreg = 0; | |
0643c724 | 616 | int status = urb->status; |
3f542974 | 617 | |
0643c724 | 618 | switch (status) { |
3f542974 PS |
619 | case 0: |
620 | /* success */ | |
621 | break; | |
622 | case -ECONNRESET: | |
623 | case -ENOENT: | |
624 | case -ESHUTDOWN: | |
625 | /* this urb is terminated, clean up */ | |
9c134a14 GKH |
626 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", |
627 | __func__, status); | |
3f542974 PS |
628 | return; |
629 | default: | |
9c134a14 GKH |
630 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", |
631 | __func__, status); | |
3f542974 PS |
632 | goto exit; |
633 | } | |
634 | ||
635 | length = urb->actual_length; | |
636 | data = urb->transfer_buffer; | |
637 | ||
cdc97792 | 638 | serial = urb->context; |
3f542974 PS |
639 | |
640 | /* Moschip get 5 bytes | |
641 | * Byte 1 IIR Port 1 (port.number is 0) | |
642 | * Byte 2 IIR Port 2 (port.number is 1) | |
643 | * Byte 3 IIR Port 3 (port.number is 2) | |
644 | * Byte 4 IIR Port 4 (port.number is 3) | |
645 | * Byte 5 FIFO status for both */ | |
646 | ||
647 | if (length && length > 5) { | |
9c134a14 | 648 | dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); |
3f542974 PS |
649 | return; |
650 | } | |
651 | ||
652 | sp[0] = (__u8) data[0]; | |
653 | sp[1] = (__u8) data[1]; | |
654 | sp[2] = (__u8) data[2]; | |
655 | sp[3] = (__u8) data[3]; | |
656 | st = (__u8) data[4]; | |
657 | ||
658 | for (i = 0; i < serial->num_ports; i++) { | |
659 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
660 | wval = | |
661 | (((__u16) serial->port[i]->number - | |
662 | (__u16) (serial->minor)) + 1) << 8; | |
663 | if (mos7840_port->open) { | |
664 | if (sp[i] & 0x01) { | |
9c134a14 | 665 | dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); |
3f542974 PS |
666 | } else { |
667 | switch (sp[i] & 0x0f) { | |
668 | case SERIAL_IIR_RLS: | |
9c134a14 GKH |
669 | dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); |
670 | dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); | |
3f542974 | 671 | mos7840_port->MsrLsr = 1; |
0de9a702 | 672 | wreg = LINE_STATUS_REGISTER; |
3f542974 PS |
673 | break; |
674 | case SERIAL_IIR_MS: | |
9c134a14 | 675 | dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); |
3f542974 | 676 | mos7840_port->MsrLsr = 0; |
0de9a702 | 677 | wreg = MODEM_STATUS_REGISTER; |
3f542974 PS |
678 | break; |
679 | } | |
e681b66f | 680 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); |
3f542974 PS |
681 | } |
682 | } | |
683 | } | |
880af9db AC |
684 | if (!(rv < 0)) |
685 | /* the completion handler for the control urb will resubmit */ | |
0de9a702 ON |
686 | return; |
687 | exit: | |
3f542974 PS |
688 | result = usb_submit_urb(urb, GFP_ATOMIC); |
689 | if (result) { | |
690 | dev_err(&urb->dev->dev, | |
691 | "%s - Error %d submitting interrupt urb\n", | |
441b62c1 | 692 | __func__, result); |
3f542974 | 693 | } |
3f542974 PS |
694 | } |
695 | ||
696 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
697 | const char *function) | |
698 | { | |
699 | if (!port) { | |
9c134a14 | 700 | pr_debug("%s - port == NULL\n", function); |
3f542974 PS |
701 | return -1; |
702 | } | |
703 | if (!port->serial) { | |
9c134a14 | 704 | pr_debug("%s - port->serial == NULL\n", function); |
3f542974 PS |
705 | return -1; |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
712 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
713 | const char *function) | |
714 | { | |
715 | if (!serial) { | |
9c134a14 | 716 | pr_debug("%s - serial == NULL\n", function); |
3f542974 PS |
717 | return -1; |
718 | } | |
719 | if (!serial->type) { | |
9c134a14 | 720 | pr_debug("%s - serial->type == NULL!\n", function); |
3f542974 PS |
721 | return -1; |
722 | } | |
723 | ||
724 | return 0; | |
725 | } | |
726 | ||
727 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
728 | const char *function) | |
729 | { | |
730 | /* if no port was specified, or it fails a paranoia check */ | |
731 | if (!port || | |
732 | mos7840_port_paranoia_check(port, function) || | |
733 | mos7840_serial_paranoia_check(port->serial, function)) { | |
880af9db AC |
734 | /* then say that we don't have a valid usb_serial thing, |
735 | * which will end up genrating -ENODEV return values */ | |
3f542974 PS |
736 | return NULL; |
737 | } | |
738 | ||
739 | return port->serial; | |
740 | } | |
741 | ||
742 | /***************************************************************************** | |
743 | * mos7840_bulk_in_callback | |
744 | * this is the callback function for when we have received data on the | |
745 | * bulk in endpoint. | |
746 | *****************************************************************************/ | |
747 | ||
7d12e780 | 748 | static void mos7840_bulk_in_callback(struct urb *urb) |
3f542974 | 749 | { |
0643c724 | 750 | int retval; |
3f542974 PS |
751 | unsigned char *data; |
752 | struct usb_serial *serial; | |
753 | struct usb_serial_port *port; | |
754 | struct moschip_port *mos7840_port; | |
0643c724 | 755 | int status = urb->status; |
3f542974 | 756 | |
cdc97792 | 757 | mos7840_port = urb->context; |
9c134a14 | 758 | if (!mos7840_port) |
50de36f7 | 759 | return; |
50de36f7 GKH |
760 | |
761 | if (status) { | |
9c134a14 | 762 | dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); |
50de36f7 | 763 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
764 | return; |
765 | } | |
766 | ||
9c134a14 | 767 | port = mos7840_port->port; |
441b62c1 | 768 | if (mos7840_port_paranoia_check(port, __func__)) { |
50de36f7 | 769 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
770 | return; |
771 | } | |
772 | ||
441b62c1 | 773 | serial = mos7840_get_usb_serial(port, __func__); |
3f542974 | 774 | if (!serial) { |
50de36f7 | 775 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
776 | return; |
777 | } | |
778 | ||
3f542974 | 779 | data = urb->transfer_buffer; |
59d33f2f | 780 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
3f542974 | 781 | |
3f542974 | 782 | if (urb->actual_length) { |
05c7cd39 | 783 | struct tty_port *tport = &mos7840_port->port->port; |
2e124b4a JS |
784 | tty_insert_flip_string(tport, data, urb->actual_length); |
785 | tty_flip_buffer_push(tport); | |
8c1a07ff JH |
786 | port->icount.rx += urb->actual_length; |
787 | dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); | |
3f542974 PS |
788 | } |
789 | ||
790 | if (!mos7840_port->read_urb) { | |
9c134a14 | 791 | dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); |
50de36f7 | 792 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
793 | return; |
794 | } | |
795 | ||
62a2cfc2 JH |
796 | if (mos7840_port->has_led) |
797 | mos7840_led_activity(port); | |
3f542974 | 798 | |
50de36f7 | 799 | mos7840_port->read_urb_busy = true; |
0643c724 | 800 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
0de9a702 | 801 | |
0643c724 | 802 | if (retval) { |
9c134a14 | 803 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); |
50de36f7 | 804 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
805 | } |
806 | } | |
807 | ||
808 | /***************************************************************************** | |
809 | * mos7840_bulk_out_data_callback | |
880af9db AC |
810 | * this is the callback function for when we have finished sending |
811 | * serial data on the bulk out endpoint. | |
3f542974 PS |
812 | *****************************************************************************/ |
813 | ||
7d12e780 | 814 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
3f542974 PS |
815 | { |
816 | struct moschip_port *mos7840_port; | |
9c134a14 | 817 | struct usb_serial_port *port; |
0643c724 | 818 | int status = urb->status; |
0de9a702 ON |
819 | int i; |
820 | ||
cdc97792 | 821 | mos7840_port = urb->context; |
9c134a14 | 822 | port = mos7840_port->port; |
0de9a702 ON |
823 | spin_lock(&mos7840_port->pool_lock); |
824 | for (i = 0; i < NUM_URBS; i++) { | |
825 | if (urb == mos7840_port->write_urb_pool[i]) { | |
826 | mos7840_port->busy[i] = 0; | |
827 | break; | |
828 | } | |
829 | } | |
830 | spin_unlock(&mos7840_port->pool_lock); | |
831 | ||
0643c724 | 832 | if (status) { |
9c134a14 | 833 | dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); |
3f542974 PS |
834 | return; |
835 | } | |
836 | ||
9c134a14 | 837 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 838 | return; |
3f542974 | 839 | |
6aad04f2 JS |
840 | if (mos7840_port->open) |
841 | tty_port_tty_wakeup(&port->port); | |
3f542974 PS |
842 | |
843 | } | |
844 | ||
845 | /************************************************************************/ | |
846 | /* 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 */ | |
847 | /************************************************************************/ | |
3f542974 PS |
848 | |
849 | /***************************************************************************** | |
850 | * mos7840_open | |
851 | * this function is called by the tty driver when a port is opened | |
852 | * If successful, we return 0 | |
853 | * Otherwise we return a negative error number. | |
854 | *****************************************************************************/ | |
855 | ||
a509a7e4 | 856 | static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) |
3f542974 PS |
857 | { |
858 | int response; | |
859 | int j; | |
860 | struct usb_serial *serial; | |
861 | struct urb *urb; | |
862 | __u16 Data; | |
863 | int status; | |
864 | struct moschip_port *mos7840_port; | |
0de9a702 | 865 | struct moschip_port *port0; |
3f542974 | 866 | |
9c134a14 | 867 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 868 | return -ENODEV; |
3f542974 | 869 | |
3f542974 PS |
870 | serial = port->serial; |
871 | ||
9c134a14 | 872 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 873 | return -ENODEV; |
3f542974 PS |
874 | |
875 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 876 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 877 | |
0de9a702 | 878 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 PS |
879 | return -ENODEV; |
880 | ||
881 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
882 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
0de9a702 | 883 | port0->open_ports++; |
3f542974 PS |
884 | |
885 | /* Initialising the write urb pool */ | |
886 | for (j = 0; j < NUM_URBS; ++j) { | |
0de9a702 | 887 | urb = usb_alloc_urb(0, GFP_KERNEL); |
3f542974 PS |
888 | mos7840_port->write_urb_pool[j] = urb; |
889 | ||
890 | if (urb == NULL) { | |
194343d9 | 891 | dev_err(&port->dev, "No more urbs???\n"); |
3f542974 PS |
892 | continue; |
893 | } | |
894 | ||
880af9db AC |
895 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
896 | GFP_KERNEL); | |
3f542974 | 897 | if (!urb->transfer_buffer) { |
0de9a702 ON |
898 | usb_free_urb(urb); |
899 | mos7840_port->write_urb_pool[j] = NULL; | |
194343d9 GKH |
900 | dev_err(&port->dev, |
901 | "%s-out of memory for urb buffers.\n", | |
902 | __func__); | |
3f542974 PS |
903 | continue; |
904 | } | |
905 | } | |
906 | ||
907 | /***************************************************************************** | |
908 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
909 | * | |
910 | * Register Index | |
911 | * 1 : IER | |
912 | * 2 : FCR | |
913 | * 3 : LCR | |
914 | * 4 : MCR | |
915 | * | |
916 | * 0x08 : SP1/2 Control Reg | |
917 | *****************************************************************************/ | |
918 | ||
880af9db | 919 | /* NEED to check the following Block */ |
3f542974 | 920 | |
3f542974 PS |
921 | Data = 0x0; |
922 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
923 | if (status < 0) { | |
9c134a14 | 924 | dev_dbg(&port->dev, "Reading Spreg failed\n"); |
d3fe9f67 | 925 | goto err; |
3f542974 PS |
926 | } |
927 | Data |= 0x80; | |
928 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
929 | if (status < 0) { | |
9c134a14 | 930 | dev_dbg(&port->dev, "writing Spreg failed\n"); |
d3fe9f67 | 931 | goto err; |
3f542974 PS |
932 | } |
933 | ||
934 | Data &= ~0x80; | |
935 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
936 | if (status < 0) { | |
9c134a14 | 937 | dev_dbg(&port->dev, "writing Spreg failed\n"); |
d3fe9f67 | 938 | goto err; |
3f542974 | 939 | } |
880af9db | 940 | /* End of block to be checked */ |
3f542974 | 941 | |
3f542974 | 942 | Data = 0x0; |
880af9db AC |
943 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
944 | &Data); | |
3f542974 | 945 | if (status < 0) { |
9c134a14 | 946 | dev_dbg(&port->dev, "Reading Controlreg failed\n"); |
d3fe9f67 | 947 | goto err; |
3f542974 | 948 | } |
880af9db AC |
949 | Data |= 0x08; /* Driver done bit */ |
950 | Data |= 0x20; /* rx_disable */ | |
951 | status = mos7840_set_reg_sync(port, | |
952 | mos7840_port->ControlRegOffset, Data); | |
3f542974 | 953 | if (status < 0) { |
9c134a14 | 954 | dev_dbg(&port->dev, "writing Controlreg failed\n"); |
d3fe9f67 | 955 | goto err; |
3f542974 | 956 | } |
880af9db AC |
957 | /* do register settings here */ |
958 | /* Set all regs to the device default values. */ | |
959 | /*********************************** | |
960 | * First Disable all interrupts. | |
961 | ***********************************/ | |
3f542974 | 962 | Data = 0x00; |
3f542974 PS |
963 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
964 | if (status < 0) { | |
9c134a14 | 965 | dev_dbg(&port->dev, "disabling interrupts failed\n"); |
d3fe9f67 | 966 | goto err; |
3f542974 | 967 | } |
880af9db | 968 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
3f542974 | 969 | Data = 0x00; |
3f542974 PS |
970 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
971 | if (status < 0) { | |
9c134a14 | 972 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); |
d3fe9f67 | 973 | goto err; |
3f542974 PS |
974 | } |
975 | ||
976 | Data = 0xcf; | |
3f542974 PS |
977 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
978 | if (status < 0) { | |
9c134a14 | 979 | dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); |
d3fe9f67 | 980 | goto err; |
3f542974 PS |
981 | } |
982 | ||
983 | Data = 0x03; | |
3f542974 PS |
984 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
985 | mos7840_port->shadowLCR = Data; | |
986 | ||
987 | Data = 0x0b; | |
3f542974 PS |
988 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
989 | mos7840_port->shadowMCR = Data; | |
990 | ||
991 | Data = 0x00; | |
3f542974 PS |
992 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
993 | mos7840_port->shadowLCR = Data; | |
994 | ||
880af9db | 995 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
996 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
997 | ||
998 | Data = 0x0c; | |
3f542974 PS |
999 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1000 | ||
1001 | Data = 0x0; | |
3f542974 PS |
1002 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1003 | ||
1004 | Data = 0x00; | |
3f542974 PS |
1005 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1006 | ||
1007 | Data = Data & ~SERIAL_LCR_DLAB; | |
3f542974 PS |
1008 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1009 | mos7840_port->shadowLCR = Data; | |
1010 | ||
880af9db | 1011 | /* clearing Bulkin and Bulkout Fifo */ |
3f542974 | 1012 | Data = 0x0; |
3f542974 PS |
1013 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
1014 | ||
1015 | Data = Data | 0x0c; | |
3f542974 PS |
1016 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
1017 | ||
1018 | Data = Data & ~0x0c; | |
3f542974 | 1019 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
880af9db | 1020 | /* Finally enable all interrupts */ |
3f542974 | 1021 | Data = 0x0c; |
3f542974 PS |
1022 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
1023 | ||
880af9db | 1024 | /* clearing rx_disable */ |
3f542974 | 1025 | Data = 0x0; |
880af9db AC |
1026 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1027 | &Data); | |
3f542974 | 1028 | Data = Data & ~0x20; |
880af9db AC |
1029 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1030 | Data); | |
3f542974 | 1031 | |
880af9db | 1032 | /* rx_negate */ |
3f542974 | 1033 | Data = 0x0; |
880af9db AC |
1034 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
1035 | &Data); | |
3f542974 | 1036 | Data = Data | 0x10; |
880af9db AC |
1037 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
1038 | Data); | |
3f542974 | 1039 | |
880af9db AC |
1040 | /* Check to see if we've set up our endpoint info yet * |
1041 | * (can't set it up in mos7840_startup as the structures * | |
1042 | * were not set up at that time.) */ | |
0de9a702 | 1043 | if (port0->open_ports == 1) { |
3a46eaa0 | 1044 | /* FIXME: Buffer never NULL, so URB is not submitted. */ |
3f542974 | 1045 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
3f542974 | 1046 | /* set up interrupt urb */ |
3f542974 | 1047 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
880af9db AC |
1048 | serial->dev, |
1049 | usb_rcvintpipe(serial->dev, | |
1050 | serial->port[0]->interrupt_in_endpointAddress), | |
1051 | serial->port[0]->interrupt_in_buffer, | |
1052 | serial->port[0]->interrupt_in_urb-> | |
1053 | transfer_buffer_length, | |
1054 | mos7840_interrupt_callback, | |
1055 | serial, | |
1056 | serial->port[0]->interrupt_in_urb->interval); | |
3f542974 PS |
1057 | |
1058 | /* start interrupt read for mos7840 * | |
1059 | * will continue as long as mos7840 is connected */ | |
1060 | ||
1061 | response = | |
1062 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1063 | GFP_KERNEL); | |
1064 | if (response) { | |
194343d9 GKH |
1065 | dev_err(&port->dev, "%s - Error %d submitting " |
1066 | "interrupt urb\n", __func__, response); | |
3f542974 PS |
1067 | } |
1068 | ||
1069 | } | |
1070 | ||
1071 | } | |
1072 | ||
1073 | /* see if we've set up our endpoint info yet * | |
1074 | * (can't set it up in mos7840_startup as the * | |
1075 | * structures were not set up at that time.) */ | |
1076 | ||
9c134a14 GKH |
1077 | dev_dbg(&port->dev, "port number is %d\n", port->number); |
1078 | dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); | |
1079 | dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); | |
1080 | dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); | |
1081 | dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); | |
1082 | dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); | |
3f542974 PS |
1083 | mos7840_port->read_urb = port->read_urb; |
1084 | ||
1085 | /* set up our bulk in urb */ | |
093ea2d3 DL |
1086 | if ((serial->num_ports == 2) |
1087 | && ((((__u16)port->number - | |
1088 | (__u16)(port->serial->minor)) % 2) != 0)) { | |
1089 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1090 | serial->dev, | |
1091 | usb_rcvbulkpipe(serial->dev, | |
1092 | (port->bulk_in_endpointAddress) + 2), | |
1093 | port->bulk_in_buffer, | |
1094 | mos7840_port->read_urb->transfer_buffer_length, | |
1095 | mos7840_bulk_in_callback, mos7840_port); | |
1096 | } else { | |
1097 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1098 | serial->dev, | |
1099 | usb_rcvbulkpipe(serial->dev, | |
1100 | port->bulk_in_endpointAddress), | |
1101 | port->bulk_in_buffer, | |
1102 | mos7840_port->read_urb->transfer_buffer_length, | |
1103 | mos7840_bulk_in_callback, mos7840_port); | |
1104 | } | |
3f542974 | 1105 | |
9c134a14 | 1106 | dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); |
50de36f7 | 1107 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
1108 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
1109 | if (response) { | |
194343d9 GKH |
1110 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
1111 | __func__, response); | |
50de36f7 | 1112 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1113 | } |
1114 | ||
1115 | /* initialize our wait queues */ | |
1116 | init_waitqueue_head(&mos7840_port->wait_chase); | |
3f542974 | 1117 | |
3f542974 | 1118 | /* initialize our port settings */ |
880af9db AC |
1119 | /* Must set to enable ints! */ |
1120 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
3f542974 PS |
1121 | /* send a open port command */ |
1122 | mos7840_port->open = 1; | |
880af9db | 1123 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
3f542974 | 1124 | |
3f542974 | 1125 | return 0; |
d3fe9f67 JH |
1126 | err: |
1127 | for (j = 0; j < NUM_URBS; ++j) { | |
1128 | urb = mos7840_port->write_urb_pool[j]; | |
1129 | if (!urb) | |
1130 | continue; | |
1131 | kfree(urb->transfer_buffer); | |
1132 | usb_free_urb(urb); | |
1133 | } | |
1134 | return status; | |
3f542974 PS |
1135 | } |
1136 | ||
1137 | /***************************************************************************** | |
1138 | * mos7840_chars_in_buffer | |
1139 | * this function is called by the tty driver when it wants to know how many | |
1140 | * bytes of data we currently have outstanding in the port (data that has | |
1141 | * been written, but hasn't made it out the port yet) | |
1142 | * If successful, we return the number of bytes left to be written in the | |
1143 | * system, | |
95da310e | 1144 | * Otherwise we return zero. |
3f542974 PS |
1145 | *****************************************************************************/ |
1146 | ||
95da310e | 1147 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
3f542974 | 1148 | { |
95da310e | 1149 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1150 | int i; |
1151 | int chars = 0; | |
0de9a702 | 1152 | unsigned long flags; |
3f542974 PS |
1153 | struct moschip_port *mos7840_port; |
1154 | ||
9c134a14 | 1155 | if (mos7840_port_paranoia_check(port, __func__)) |
95da310e | 1156 | return 0; |
3f542974 PS |
1157 | |
1158 | mos7840_port = mos7840_get_port_private(port); | |
3363155b | 1159 | if (mos7840_port == NULL) |
95da310e | 1160 | return 0; |
3f542974 | 1161 | |
880af9db | 1162 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
5c263b92 MF |
1163 | for (i = 0; i < NUM_URBS; ++i) { |
1164 | if (mos7840_port->busy[i]) { | |
1165 | struct urb *urb = mos7840_port->write_urb_pool[i]; | |
1166 | chars += urb->transfer_buffer_length; | |
1167 | } | |
1168 | } | |
880af9db | 1169 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
9c134a14 | 1170 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
0de9a702 | 1171 | return chars; |
3f542974 PS |
1172 | |
1173 | } | |
1174 | ||
3f542974 PS |
1175 | /***************************************************************************** |
1176 | * mos7840_close | |
1177 | * this function is called by the tty driver when a port is closed | |
1178 | *****************************************************************************/ | |
1179 | ||
335f8514 | 1180 | static void mos7840_close(struct usb_serial_port *port) |
3f542974 PS |
1181 | { |
1182 | struct usb_serial *serial; | |
1183 | struct moschip_port *mos7840_port; | |
0de9a702 | 1184 | struct moschip_port *port0; |
3f542974 PS |
1185 | int j; |
1186 | __u16 Data; | |
1187 | ||
9c134a14 | 1188 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1189 | return; |
3f542974 | 1190 | |
441b62c1 | 1191 | serial = mos7840_get_usb_serial(port, __func__); |
9c134a14 | 1192 | if (!serial) |
3f542974 | 1193 | return; |
3f542974 PS |
1194 | |
1195 | mos7840_port = mos7840_get_port_private(port); | |
0de9a702 | 1196 | port0 = mos7840_get_port_private(serial->port[0]); |
3f542974 | 1197 | |
0de9a702 | 1198 | if (mos7840_port == NULL || port0 == NULL) |
3f542974 | 1199 | return; |
3f542974 PS |
1200 | |
1201 | for (j = 0; j < NUM_URBS; ++j) | |
1202 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1203 | ||
1204 | /* Freeing Write URBs */ | |
1205 | for (j = 0; j < NUM_URBS; ++j) { | |
1206 | if (mos7840_port->write_urb_pool[j]) { | |
1207 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1208 | kfree(mos7840_port->write_urb_pool[j]-> | |
1209 | transfer_buffer); | |
1210 | ||
1211 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1212 | } | |
1213 | } | |
1214 | ||
bb3529c6 JH |
1215 | usb_kill_urb(mos7840_port->write_urb); |
1216 | usb_kill_urb(mos7840_port->read_urb); | |
1217 | mos7840_port->read_urb_busy = false; | |
1218 | ||
0de9a702 | 1219 | port0->open_ports--; |
9c134a14 | 1220 | dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); |
0de9a702 | 1221 | if (port0->open_ports == 0) { |
3f542974 | 1222 | if (serial->port[0]->interrupt_in_urb) { |
9c134a14 | 1223 | dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); |
0de9a702 | 1224 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
3f542974 PS |
1225 | } |
1226 | } | |
1227 | ||
1228 | if (mos7840_port->write_urb) { | |
1229 | /* if this urb had a transfer buffer already (old tx) free it */ | |
ae8d4879 | 1230 | kfree(mos7840_port->write_urb->transfer_buffer); |
3f542974 PS |
1231 | usb_free_urb(mos7840_port->write_urb); |
1232 | } | |
1233 | ||
1234 | Data = 0x0; | |
1235 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1236 | ||
1237 | Data = 0x00; | |
1238 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1239 | ||
1240 | mos7840_port->open = 0; | |
3f542974 PS |
1241 | } |
1242 | ||
1243 | /************************************************************************ | |
1244 | * | |
1245 | * mos7840_block_until_chase_response | |
1246 | * | |
1247 | * This function will block the close until one of the following: | |
1248 | * 1. Response to our Chase comes from mos7840 | |
dc0d5c1e | 1249 | * 2. A timeout of 10 seconds without activity has expired |
3f542974 PS |
1250 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
1251 | * | |
1252 | ************************************************************************/ | |
1253 | ||
95da310e AC |
1254 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
1255 | struct moschip_port *mos7840_port) | |
3f542974 | 1256 | { |
1e658489 | 1257 | int timeout = msecs_to_jiffies(1000); |
3f542974 PS |
1258 | int wait = 10; |
1259 | int count; | |
1260 | ||
1261 | while (1) { | |
95da310e | 1262 | count = mos7840_chars_in_buffer(tty); |
3f542974 PS |
1263 | |
1264 | /* Check for Buffer status */ | |
880af9db | 1265 | if (count <= 0) |
3f542974 | 1266 | return; |
3f542974 PS |
1267 | |
1268 | /* Block the thread for a while */ | |
1269 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1270 | timeout); | |
1271 | /* No activity.. count down section */ | |
1272 | wait--; | |
1273 | if (wait == 0) { | |
9c134a14 | 1274 | dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); |
3f542974 PS |
1275 | return; |
1276 | } else { | |
dc0d5c1e | 1277 | /* Reset timeout value back to seconds */ |
3f542974 PS |
1278 | wait = 10; |
1279 | } | |
1280 | } | |
1281 | ||
1282 | } | |
1283 | ||
1284 | /***************************************************************************** | |
1285 | * mos7840_break | |
1286 | * this function sends a break to the port | |
1287 | *****************************************************************************/ | |
95da310e | 1288 | static void mos7840_break(struct tty_struct *tty, int break_state) |
3f542974 | 1289 | { |
95da310e | 1290 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1291 | unsigned char data; |
1292 | struct usb_serial *serial; | |
1293 | struct moschip_port *mos7840_port; | |
1294 | ||
9c134a14 | 1295 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1296 | return; |
3f542974 | 1297 | |
441b62c1 | 1298 | serial = mos7840_get_usb_serial(port, __func__); |
9c134a14 | 1299 | if (!serial) |
3f542974 | 1300 | return; |
3f542974 PS |
1301 | |
1302 | mos7840_port = mos7840_get_port_private(port); | |
1303 | ||
880af9db | 1304 | if (mos7840_port == NULL) |
3f542974 | 1305 | return; |
3f542974 | 1306 | |
bb3529c6 JH |
1307 | /* flush and block until tx is empty */ |
1308 | mos7840_block_until_chase_response(tty, mos7840_port); | |
3f542974 | 1309 | |
95da310e | 1310 | if (break_state == -1) |
3f542974 | 1311 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
95da310e | 1312 | else |
3f542974 | 1313 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
3f542974 | 1314 | |
6b447f04 | 1315 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
3f542974 | 1316 | mos7840_port->shadowLCR = data; |
9c134a14 | 1317 | dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); |
3f542974 PS |
1318 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, |
1319 | mos7840_port->shadowLCR); | |
3f542974 PS |
1320 | } |
1321 | ||
1322 | /***************************************************************************** | |
1323 | * mos7840_write_room | |
1324 | * this function is called by the tty driver when it wants to know how many | |
1325 | * bytes of data we can accept for a specific port. | |
1326 | * If successful, we return the amount of room that we have for this port | |
1327 | * Otherwise we return a negative error number. | |
1328 | *****************************************************************************/ | |
1329 | ||
95da310e | 1330 | static int mos7840_write_room(struct tty_struct *tty) |
3f542974 | 1331 | { |
95da310e | 1332 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1333 | int i; |
1334 | int room = 0; | |
0de9a702 | 1335 | unsigned long flags; |
3f542974 PS |
1336 | struct moschip_port *mos7840_port; |
1337 | ||
9c134a14 | 1338 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1339 | return -1; |
3f542974 PS |
1340 | |
1341 | mos7840_port = mos7840_get_port_private(port); | |
9c134a14 | 1342 | if (mos7840_port == NULL) |
3f542974 | 1343 | return -1; |
3f542974 | 1344 | |
0de9a702 | 1345 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1346 | for (i = 0; i < NUM_URBS; ++i) { |
880af9db | 1347 | if (!mos7840_port->busy[i]) |
3f542974 | 1348 | room += URB_TRANSFER_BUFFER_SIZE; |
3f542974 | 1349 | } |
0de9a702 | 1350 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 | 1351 | |
0de9a702 | 1352 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
9c134a14 | 1353 | dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); |
0de9a702 | 1354 | return room; |
3f542974 PS |
1355 | |
1356 | } | |
1357 | ||
1358 | /***************************************************************************** | |
1359 | * mos7840_write | |
1360 | * this function is called by the tty driver when data should be written to | |
1361 | * the port. | |
1362 | * If successful, we return the number of bytes written, otherwise we | |
1363 | * return a negative error number. | |
1364 | *****************************************************************************/ | |
1365 | ||
95da310e | 1366 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
3f542974 PS |
1367 | const unsigned char *data, int count) |
1368 | { | |
1369 | int status; | |
1370 | int i; | |
1371 | int bytes_sent = 0; | |
1372 | int transfer_size; | |
0de9a702 | 1373 | unsigned long flags; |
3f542974 PS |
1374 | |
1375 | struct moschip_port *mos7840_port; | |
1376 | struct usb_serial *serial; | |
1377 | struct urb *urb; | |
880af9db | 1378 | /* __u16 Data; */ |
3f542974 PS |
1379 | const unsigned char *current_position = data; |
1380 | unsigned char *data1; | |
3f542974 PS |
1381 | |
1382 | #ifdef NOTMOS7840 | |
1383 | Data = 0x00; | |
3f542974 PS |
1384 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
1385 | mos7840_port->shadowLCR = Data; | |
9c134a14 GKH |
1386 | dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); |
1387 | dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); | |
3f542974 | 1388 | |
880af9db AC |
1389 | /* Data = 0x03; */ |
1390 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ | |
1391 | /* mos7840_port->shadowLCR=Data;//Need to add later */ | |
3f542974 | 1392 | |
880af9db | 1393 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
3f542974 PS |
1394 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1395 | ||
880af9db AC |
1396 | /* Data = 0x0c; */ |
1397 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ | |
3f542974 | 1398 | Data = 0x00; |
3f542974 | 1399 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
9c134a14 | 1400 | dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); |
3f542974 PS |
1401 | |
1402 | Data = 0x0; | |
3f542974 | 1403 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
9c134a14 | 1404 | dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); |
3f542974 PS |
1405 | |
1406 | Data = Data & ~SERIAL_LCR_DLAB; | |
9c134a14 | 1407 | dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); |
3f542974 PS |
1408 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
1409 | #endif | |
1410 | ||
9c134a14 | 1411 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1412 | return -1; |
3f542974 PS |
1413 | |
1414 | serial = port->serial; | |
9c134a14 | 1415 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 1416 | return -1; |
3f542974 PS |
1417 | |
1418 | mos7840_port = mos7840_get_port_private(port); | |
9c134a14 | 1419 | if (mos7840_port == NULL) |
3f542974 | 1420 | return -1; |
3f542974 PS |
1421 | |
1422 | /* try to find a free urb in the list */ | |
1423 | urb = NULL; | |
1424 | ||
0de9a702 | 1425 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
3f542974 | 1426 | for (i = 0; i < NUM_URBS; ++i) { |
0de9a702 ON |
1427 | if (!mos7840_port->busy[i]) { |
1428 | mos7840_port->busy[i] = 1; | |
3f542974 | 1429 | urb = mos7840_port->write_urb_pool[i]; |
9c134a14 | 1430 | dev_dbg(&port->dev, "URB:%d\n", i); |
3f542974 PS |
1431 | break; |
1432 | } | |
1433 | } | |
0de9a702 | 1434 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
3f542974 PS |
1435 | |
1436 | if (urb == NULL) { | |
9c134a14 | 1437 | dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); |
3f542974 PS |
1438 | goto exit; |
1439 | } | |
1440 | ||
1441 | if (urb->transfer_buffer == NULL) { | |
45a28ef3 AK |
1442 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
1443 | GFP_ATOMIC); | |
3f542974 PS |
1444 | |
1445 | if (urb->transfer_buffer == NULL) { | |
22a416c4 | 1446 | dev_err_console(port, "%s no more kernel memory...\n", |
194343d9 | 1447 | __func__); |
3f542974 PS |
1448 | goto exit; |
1449 | } | |
1450 | } | |
1451 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1452 | ||
97c4965d | 1453 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
3f542974 PS |
1454 | |
1455 | /* fill urb with data and submit */ | |
093ea2d3 DL |
1456 | if ((serial->num_ports == 2) |
1457 | && ((((__u16)port->number - | |
1458 | (__u16)(port->serial->minor)) % 2) != 0)) { | |
1459 | usb_fill_bulk_urb(urb, | |
1460 | serial->dev, | |
1461 | usb_sndbulkpipe(serial->dev, | |
1462 | (port->bulk_out_endpointAddress) + 2), | |
1463 | urb->transfer_buffer, | |
1464 | transfer_size, | |
1465 | mos7840_bulk_out_data_callback, mos7840_port); | |
1466 | } else { | |
1467 | usb_fill_bulk_urb(urb, | |
1468 | serial->dev, | |
1469 | usb_sndbulkpipe(serial->dev, | |
1470 | port->bulk_out_endpointAddress), | |
1471 | urb->transfer_buffer, | |
1472 | transfer_size, | |
1473 | mos7840_bulk_out_data_callback, mos7840_port); | |
1474 | } | |
3f542974 PS |
1475 | |
1476 | data1 = urb->transfer_buffer; | |
9c134a14 | 1477 | dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); |
3f542974 | 1478 | |
62a2cfc2 JH |
1479 | if (mos7840_port->has_led) |
1480 | mos7840_led_activity(port); | |
0eafe4de | 1481 | |
3f542974 PS |
1482 | /* send it down the pipe */ |
1483 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1484 | ||
1485 | if (status) { | |
0de9a702 | 1486 | mos7840_port->busy[i] = 0; |
22a416c4 | 1487 | dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
194343d9 | 1488 | "with status = %d\n", __func__, status); |
3f542974 PS |
1489 | bytes_sent = status; |
1490 | goto exit; | |
1491 | } | |
1492 | bytes_sent = transfer_size; | |
8c1a07ff JH |
1493 | port->icount.tx += transfer_size; |
1494 | dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); | |
95da310e | 1495 | exit: |
3f542974 PS |
1496 | return bytes_sent; |
1497 | ||
1498 | } | |
1499 | ||
1500 | /***************************************************************************** | |
1501 | * mos7840_throttle | |
1502 | * this function is called by the tty driver when it wants to stop the data | |
1503 | * being read from the port. | |
1504 | *****************************************************************************/ | |
1505 | ||
95da310e | 1506 | static void mos7840_throttle(struct tty_struct *tty) |
3f542974 | 1507 | { |
95da310e | 1508 | struct usb_serial_port *port = tty->driver_data; |
3f542974 | 1509 | struct moschip_port *mos7840_port; |
3f542974 PS |
1510 | int status; |
1511 | ||
9c134a14 | 1512 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1513 | return; |
3f542974 PS |
1514 | |
1515 | mos7840_port = mos7840_get_port_private(port); | |
1516 | ||
1517 | if (mos7840_port == NULL) | |
1518 | return; | |
1519 | ||
1520 | if (!mos7840_port->open) { | |
9c134a14 | 1521 | dev_dbg(&port->dev, "%s", "port not opened\n"); |
3f542974 PS |
1522 | return; |
1523 | } | |
1524 | ||
3f542974 PS |
1525 | /* if we are implementing XON/XOFF, send the stop character */ |
1526 | if (I_IXOFF(tty)) { | |
1527 | unsigned char stop_char = STOP_CHAR(tty); | |
95da310e AC |
1528 | status = mos7840_write(tty, port, &stop_char, 1); |
1529 | if (status <= 0) | |
3f542974 | 1530 | return; |
3f542974 | 1531 | } |
3f542974 | 1532 | /* if we are implementing RTS/CTS, toggle that line */ |
adc8d746 | 1533 | if (tty->termios.c_cflag & CRTSCTS) { |
3f542974 | 1534 | mos7840_port->shadowMCR &= ~MCR_RTS; |
95da310e | 1535 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1536 | mos7840_port->shadowMCR); |
95da310e | 1537 | if (status < 0) |
3f542974 | 1538 | return; |
3f542974 | 1539 | } |
3f542974 PS |
1540 | } |
1541 | ||
1542 | /***************************************************************************** | |
1543 | * mos7840_unthrottle | |
880af9db AC |
1544 | * this function is called by the tty driver when it wants to resume |
1545 | * the data being read from the port (called after mos7840_throttle is | |
1546 | * called) | |
3f542974 | 1547 | *****************************************************************************/ |
95da310e | 1548 | static void mos7840_unthrottle(struct tty_struct *tty) |
3f542974 | 1549 | { |
95da310e | 1550 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1551 | int status; |
1552 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1553 | ||
9c134a14 | 1554 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1555 | return; |
3f542974 PS |
1556 | |
1557 | if (mos7840_port == NULL) | |
1558 | return; | |
1559 | ||
1560 | if (!mos7840_port->open) { | |
9c134a14 | 1561 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
1562 | return; |
1563 | } | |
1564 | ||
3f542974 PS |
1565 | /* if we are implementing XON/XOFF, send the start character */ |
1566 | if (I_IXOFF(tty)) { | |
1567 | unsigned char start_char = START_CHAR(tty); | |
95da310e AC |
1568 | status = mos7840_write(tty, port, &start_char, 1); |
1569 | if (status <= 0) | |
3f542974 | 1570 | return; |
3f542974 PS |
1571 | } |
1572 | ||
1573 | /* if we are implementing RTS/CTS, toggle that line */ | |
adc8d746 | 1574 | if (tty->termios.c_cflag & CRTSCTS) { |
3f542974 | 1575 | mos7840_port->shadowMCR |= MCR_RTS; |
95da310e | 1576 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
3f542974 | 1577 | mos7840_port->shadowMCR); |
95da310e | 1578 | if (status < 0) |
3f542974 | 1579 | return; |
3f542974 | 1580 | } |
3f542974 PS |
1581 | } |
1582 | ||
60b33c13 | 1583 | static int mos7840_tiocmget(struct tty_struct *tty) |
3f542974 | 1584 | { |
95da310e | 1585 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1586 | struct moschip_port *mos7840_port; |
1587 | unsigned int result; | |
1588 | __u16 msr; | |
1589 | __u16 mcr; | |
880af9db | 1590 | int status; |
3f542974 PS |
1591 | mos7840_port = mos7840_get_port_private(port); |
1592 | ||
3f542974 PS |
1593 | if (mos7840_port == NULL) |
1594 | return -ENODEV; | |
1595 | ||
1596 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
7471b5f4 JH |
1597 | if (status != 1) |
1598 | return -EIO; | |
3f542974 | 1599 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); |
7471b5f4 JH |
1600 | if (status != 1) |
1601 | return -EIO; | |
3f542974 PS |
1602 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) |
1603 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1604 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1605 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1606 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1607 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1608 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1609 | ||
9c134a14 | 1610 | dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); |
3f542974 PS |
1611 | |
1612 | return result; | |
1613 | } | |
1614 | ||
20b9d177 | 1615 | static int mos7840_tiocmset(struct tty_struct *tty, |
3f542974 PS |
1616 | unsigned int set, unsigned int clear) |
1617 | { | |
95da310e | 1618 | struct usb_serial_port *port = tty->driver_data; |
3f542974 PS |
1619 | struct moschip_port *mos7840_port; |
1620 | unsigned int mcr; | |
87521c46 | 1621 | int status; |
3f542974 | 1622 | |
3f542974 PS |
1623 | mos7840_port = mos7840_get_port_private(port); |
1624 | ||
1625 | if (mos7840_port == NULL) | |
1626 | return -ENODEV; | |
1627 | ||
e2984494 | 1628 | /* FIXME: What locks the port registers ? */ |
3f542974 PS |
1629 | mcr = mos7840_port->shadowMCR; |
1630 | if (clear & TIOCM_RTS) | |
1631 | mcr &= ~MCR_RTS; | |
1632 | if (clear & TIOCM_DTR) | |
1633 | mcr &= ~MCR_DTR; | |
1634 | if (clear & TIOCM_LOOP) | |
1635 | mcr &= ~MCR_LOOPBACK; | |
1636 | ||
1637 | if (set & TIOCM_RTS) | |
1638 | mcr |= MCR_RTS; | |
1639 | if (set & TIOCM_DTR) | |
1640 | mcr |= MCR_DTR; | |
1641 | if (set & TIOCM_LOOP) | |
1642 | mcr |= MCR_LOOPBACK; | |
1643 | ||
1644 | mos7840_port->shadowMCR = mcr; | |
1645 | ||
3f542974 PS |
1646 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
1647 | if (status < 0) { | |
9c134a14 | 1648 | dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); |
87521c46 | 1649 | return status; |
3f542974 PS |
1650 | } |
1651 | ||
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | /***************************************************************************** | |
1656 | * mos7840_calc_baud_rate_divisor | |
1657 | * this function calculates the proper baud rate divisor for the specified | |
1658 | * baud rate. | |
1659 | *****************************************************************************/ | |
9c134a14 GKH |
1660 | static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, |
1661 | int baudRate, int *divisor, | |
880af9db | 1662 | __u16 *clk_sel_val) |
3f542974 | 1663 | { |
9c134a14 | 1664 | dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); |
3f542974 PS |
1665 | |
1666 | if (baudRate <= 115200) { | |
1667 | *divisor = 115200 / baudRate; | |
1668 | *clk_sel_val = 0x0; | |
1669 | } | |
1670 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1671 | *divisor = 230400 / baudRate; | |
1672 | *clk_sel_val = 0x10; | |
1673 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1674 | *divisor = 403200 / baudRate; | |
1675 | *clk_sel_val = 0x20; | |
1676 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1677 | *divisor = 460800 / baudRate; | |
1678 | *clk_sel_val = 0x30; | |
1679 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1680 | *divisor = 806400 / baudRate; | |
1681 | *clk_sel_val = 0x40; | |
1682 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1683 | *divisor = 921600 / baudRate; | |
1684 | *clk_sel_val = 0x50; | |
1685 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1686 | *divisor = 1572864 / baudRate; | |
1687 | *clk_sel_val = 0x60; | |
1688 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1689 | *divisor = 3145728 / baudRate; | |
1690 | *clk_sel_val = 0x70; | |
1691 | } | |
1692 | return 0; | |
1693 | ||
1694 | #ifdef NOTMCS7840 | |
1695 | ||
1696 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1697 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1698 | *divisor = mos7840_divisor_table[i].Divisor; | |
1699 | return 0; | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* After trying for all the standard baud rates * | |
1704 | * Try calculating the divisor for this baud rate */ | |
1705 | ||
1706 | if (baudrate > 75 && baudrate < 230400) { | |
1707 | /* get the divisor */ | |
1708 | custom = (__u16) (230400L / baudrate); | |
1709 | ||
1710 | /* Check for round off */ | |
1711 | round1 = (__u16) (2304000L / baudrate); | |
1712 | round = (__u16) (round1 - (custom * 10)); | |
880af9db | 1713 | if (round > 4) |
3f542974 | 1714 | custom++; |
3f542974 PS |
1715 | *divisor = custom; |
1716 | ||
9c134a14 | 1717 | dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); |
3f542974 PS |
1718 | return 0; |
1719 | } | |
1720 | ||
9c134a14 | 1721 | dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); |
3f542974 PS |
1722 | return -1; |
1723 | #endif | |
1724 | } | |
1725 | ||
1726 | /***************************************************************************** | |
1727 | * mos7840_send_cmd_write_baud_rate | |
1728 | * this function sends the proper command to change the baud rate of the | |
1729 | * specified port. | |
1730 | *****************************************************************************/ | |
1731 | ||
1732 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1733 | int baudRate) | |
1734 | { | |
1735 | int divisor = 0; | |
1736 | int status; | |
1737 | __u16 Data; | |
1738 | unsigned char number; | |
1739 | __u16 clk_sel_val; | |
1740 | struct usb_serial_port *port; | |
1741 | ||
1742 | if (mos7840_port == NULL) | |
1743 | return -1; | |
1744 | ||
9c134a14 GKH |
1745 | port = mos7840_port->port; |
1746 | if (mos7840_port_paranoia_check(port, __func__)) | |
3f542974 | 1747 | return -1; |
3f542974 | 1748 | |
9c134a14 | 1749 | if (mos7840_serial_paranoia_check(port->serial, __func__)) |
3f542974 | 1750 | return -1; |
3f542974 | 1751 | |
3f542974 PS |
1752 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; |
1753 | ||
9c134a14 GKH |
1754 | dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, |
1755 | mos7840_port->port->number, baudRate); | |
880af9db | 1756 | /* reset clk_uart_sel in spregOffset */ |
3f542974 PS |
1757 | if (baudRate > 115200) { |
1758 | #ifdef HW_flow_control | |
880af9db AC |
1759 | /* NOTE: need to see the pther register to modify */ |
1760 | /* setting h/w flow control bit to 1 */ | |
3f542974 PS |
1761 | Data = 0x2b; |
1762 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1763 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1764 | Data); | |
3f542974 | 1765 | if (status < 0) { |
9c134a14 | 1766 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1767 | return -1; |
1768 | } | |
1769 | #endif | |
1770 | ||
1771 | } else { | |
1772 | #ifdef HW_flow_control | |
093ea2d3 | 1773 | /* setting h/w flow control bit to 0 */ |
3f542974 PS |
1774 | Data = 0xb; |
1775 | mos7840_port->shadowMCR = Data; | |
880af9db AC |
1776 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
1777 | Data); | |
3f542974 | 1778 | if (status < 0) { |
9c134a14 | 1779 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1780 | return -1; |
1781 | } | |
1782 | #endif | |
1783 | ||
1784 | } | |
1785 | ||
880af9db | 1786 | if (1) { /* baudRate <= 115200) */ |
3f542974 PS |
1787 | clk_sel_val = 0x0; |
1788 | Data = 0x0; | |
9c134a14 | 1789 | status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, |
3f542974 | 1790 | &clk_sel_val); |
880af9db AC |
1791 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
1792 | &Data); | |
3f542974 | 1793 | if (status < 0) { |
9c134a14 | 1794 | dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); |
3f542974 PS |
1795 | return -1; |
1796 | } | |
1797 | Data = (Data & 0x8f) | clk_sel_val; | |
880af9db AC |
1798 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
1799 | Data); | |
3f542974 | 1800 | if (status < 0) { |
9c134a14 | 1801 | dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); |
3f542974 PS |
1802 | return -1; |
1803 | } | |
1804 | /* Calculate the Divisor */ | |
1805 | ||
1806 | if (status) { | |
194343d9 | 1807 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
3f542974 PS |
1808 | return status; |
1809 | } | |
1810 | /* Enable access to divisor latch */ | |
1811 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1812 | mos7840_port->shadowLCR = Data; | |
1813 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1814 | ||
1815 | /* Write the divisor */ | |
1816 | Data = (unsigned char)(divisor & 0xff); | |
9c134a14 | 1817 | dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); |
3f542974 PS |
1818 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
1819 | ||
1820 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
9c134a14 | 1821 | dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); |
3f542974 PS |
1822 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
1823 | ||
1824 | /* Disable access to divisor latch */ | |
1825 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1826 | mos7840_port->shadowLCR = Data; | |
1827 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1828 | ||
1829 | } | |
3f542974 PS |
1830 | return status; |
1831 | } | |
1832 | ||
1833 | /***************************************************************************** | |
1834 | * mos7840_change_port_settings | |
1835 | * This routine is called to set the UART on the device to match | |
1836 | * the specified new settings. | |
1837 | *****************************************************************************/ | |
1838 | ||
95da310e AC |
1839 | static void mos7840_change_port_settings(struct tty_struct *tty, |
1840 | struct moschip_port *mos7840_port, struct ktermios *old_termios) | |
3f542974 | 1841 | { |
3f542974 PS |
1842 | int baud; |
1843 | unsigned cflag; | |
1844 | unsigned iflag; | |
1845 | __u8 lData; | |
1846 | __u8 lParity; | |
1847 | __u8 lStop; | |
1848 | int status; | |
1849 | __u16 Data; | |
1850 | struct usb_serial_port *port; | |
1851 | struct usb_serial *serial; | |
1852 | ||
1853 | if (mos7840_port == NULL) | |
1854 | return; | |
1855 | ||
9c134a14 | 1856 | port = mos7840_port->port; |
3f542974 | 1857 | |
9c134a14 | 1858 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 1859 | return; |
3f542974 | 1860 | |
9c134a14 | 1861 | if (mos7840_serial_paranoia_check(port->serial, __func__)) |
3f542974 | 1862 | return; |
3f542974 PS |
1863 | |
1864 | serial = port->serial; | |
1865 | ||
3f542974 | 1866 | if (!mos7840_port->open) { |
9c134a14 | 1867 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
1868 | return; |
1869 | } | |
1870 | ||
3f542974 PS |
1871 | lData = LCR_BITS_8; |
1872 | lStop = LCR_STOP_1; | |
1873 | lParity = LCR_PAR_NONE; | |
1874 | ||
adc8d746 AC |
1875 | cflag = tty->termios.c_cflag; |
1876 | iflag = tty->termios.c_iflag; | |
3f542974 PS |
1877 | |
1878 | /* Change the number of bits */ | |
d410cf27 CL |
1879 | switch (cflag & CSIZE) { |
1880 | case CS5: | |
1881 | lData = LCR_BITS_5; | |
1882 | break; | |
3f542974 | 1883 | |
d410cf27 CL |
1884 | case CS6: |
1885 | lData = LCR_BITS_6; | |
1886 | break; | |
3f542974 | 1887 | |
d410cf27 CL |
1888 | case CS7: |
1889 | lData = LCR_BITS_7; | |
1890 | break; | |
1891 | ||
1892 | default: | |
1893 | case CS8: | |
1894 | lData = LCR_BITS_8; | |
1895 | break; | |
3f542974 | 1896 | } |
d410cf27 | 1897 | |
3f542974 PS |
1898 | /* Change the Parity bit */ |
1899 | if (cflag & PARENB) { | |
1900 | if (cflag & PARODD) { | |
1901 | lParity = LCR_PAR_ODD; | |
9c134a14 | 1902 | dev_dbg(&port->dev, "%s - parity = odd\n", __func__); |
3f542974 PS |
1903 | } else { |
1904 | lParity = LCR_PAR_EVEN; | |
9c134a14 | 1905 | dev_dbg(&port->dev, "%s - parity = even\n", __func__); |
3f542974 PS |
1906 | } |
1907 | ||
1908 | } else { | |
9c134a14 | 1909 | dev_dbg(&port->dev, "%s - parity = none\n", __func__); |
3f542974 PS |
1910 | } |
1911 | ||
880af9db | 1912 | if (cflag & CMSPAR) |
3f542974 | 1913 | lParity = lParity | 0x20; |
3f542974 PS |
1914 | |
1915 | /* Change the Stop bit */ | |
1916 | if (cflag & CSTOPB) { | |
1917 | lStop = LCR_STOP_2; | |
9c134a14 | 1918 | dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); |
3f542974 PS |
1919 | } else { |
1920 | lStop = LCR_STOP_1; | |
9c134a14 | 1921 | dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); |
3f542974 PS |
1922 | } |
1923 | ||
1924 | /* Update the LCR with the correct value */ | |
1925 | mos7840_port->shadowLCR &= | |
1926 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1927 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
1928 | ||
9c134a14 GKH |
1929 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, |
1930 | mos7840_port->shadowLCR); | |
3f542974 PS |
1931 | /* Disable Interrupts */ |
1932 | Data = 0x00; | |
1933 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1934 | ||
1935 | Data = 0x00; | |
1936 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1937 | ||
1938 | Data = 0xcf; | |
1939 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
1940 | ||
1941 | /* Send the updated LCR value to the mos7840 */ | |
1942 | Data = mos7840_port->shadowLCR; | |
1943 | ||
1944 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1945 | ||
1946 | Data = 0x00b; | |
1947 | mos7840_port->shadowMCR = Data; | |
1948 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1949 | Data = 0x00b; | |
1950 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1951 | ||
1952 | /* set up the MCR register and send it to the mos7840 */ | |
1953 | ||
1954 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
880af9db | 1955 | if (cflag & CBAUD) |
3f542974 | 1956 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
3f542974 | 1957 | |
880af9db | 1958 | if (cflag & CRTSCTS) |
3f542974 | 1959 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
880af9db | 1960 | else |
3f542974 | 1961 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
3f542974 PS |
1962 | |
1963 | Data = mos7840_port->shadowMCR; | |
1964 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1965 | ||
1966 | /* Determine divisor based on baud rate */ | |
1967 | baud = tty_get_baud_rate(tty); | |
1968 | ||
1969 | if (!baud) { | |
1970 | /* pick a default, any default... */ | |
9c134a14 | 1971 | dev_dbg(&port->dev, "%s", "Picked default baud...\n"); |
3f542974 PS |
1972 | baud = 9600; |
1973 | } | |
1974 | ||
9c134a14 | 1975 | dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); |
3f542974 PS |
1976 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
1977 | ||
1978 | /* Enable Interrupts */ | |
1979 | Data = 0x0c; | |
1980 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1981 | ||
50de36f7 | 1982 | if (mos7840_port->read_urb_busy == false) { |
50de36f7 | 1983 | mos7840_port->read_urb_busy = true; |
3f542974 | 1984 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
3f542974 | 1985 | if (status) { |
9c134a14 | 1986 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", |
3f542974 | 1987 | status); |
50de36f7 | 1988 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
1989 | } |
1990 | } | |
9c134a14 GKH |
1991 | dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, |
1992 | mos7840_port->shadowLCR); | |
3f542974 PS |
1993 | } |
1994 | ||
1995 | /***************************************************************************** | |
1996 | * mos7840_set_termios | |
1997 | * this function is called by the tty driver when it wants to change | |
1998 | * the termios structure | |
1999 | *****************************************************************************/ | |
2000 | ||
95da310e AC |
2001 | static void mos7840_set_termios(struct tty_struct *tty, |
2002 | struct usb_serial_port *port, | |
606d099c | 2003 | struct ktermios *old_termios) |
3f542974 PS |
2004 | { |
2005 | int status; | |
2006 | unsigned int cflag; | |
2007 | struct usb_serial *serial; | |
2008 | struct moschip_port *mos7840_port; | |
3363155b | 2009 | |
9c134a14 | 2010 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 2011 | return; |
3f542974 PS |
2012 | |
2013 | serial = port->serial; | |
2014 | ||
9c134a14 | 2015 | if (mos7840_serial_paranoia_check(serial, __func__)) |
3f542974 | 2016 | return; |
3f542974 PS |
2017 | |
2018 | mos7840_port = mos7840_get_port_private(port); | |
2019 | ||
2020 | if (mos7840_port == NULL) | |
2021 | return; | |
2022 | ||
3f542974 | 2023 | if (!mos7840_port->open) { |
9c134a14 | 2024 | dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
3f542974 PS |
2025 | return; |
2026 | } | |
2027 | ||
9c134a14 | 2028 | dev_dbg(&port->dev, "%s", "setting termios - \n"); |
3f542974 | 2029 | |
adc8d746 | 2030 | cflag = tty->termios.c_cflag; |
3f542974 | 2031 | |
9c134a14 | 2032 | dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, |
d9a80746 | 2033 | tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); |
9c134a14 GKH |
2034 | dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, |
2035 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
2036 | dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); | |
3f542974 PS |
2037 | |
2038 | /* change the port settings to the new ones specified */ | |
2039 | ||
95da310e | 2040 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
3f542974 PS |
2041 | |
2042 | if (!mos7840_port->read_urb) { | |
9c134a14 | 2043 | dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); |
3f542974 PS |
2044 | return; |
2045 | } | |
2046 | ||
50de36f7 | 2047 | if (mos7840_port->read_urb_busy == false) { |
50de36f7 | 2048 | mos7840_port->read_urb_busy = true; |
3f542974 PS |
2049 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
2050 | if (status) { | |
9c134a14 | 2051 | dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", |
3f542974 | 2052 | status); |
50de36f7 | 2053 | mos7840_port->read_urb_busy = false; |
3f542974 PS |
2054 | } |
2055 | } | |
3f542974 PS |
2056 | } |
2057 | ||
2058 | /***************************************************************************** | |
2059 | * mos7840_get_lsr_info - get line status register info | |
2060 | * | |
2061 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2062 | * is emptied. On bus types like RS485, the transmitter must | |
2063 | * release the bus after transmitting. This must be done when | |
2064 | * the transmit shift register is empty, not be done when the | |
2065 | * transmit holding register is empty. This functionality | |
2066 | * allows an RS485 driver to be written in user space. | |
2067 | *****************************************************************************/ | |
2068 | ||
95da310e | 2069 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
97c4965d | 2070 | unsigned int __user *value) |
3f542974 PS |
2071 | { |
2072 | int count; | |
2073 | unsigned int result = 0; | |
2074 | ||
95da310e | 2075 | count = mos7840_chars_in_buffer(tty); |
9c134a14 | 2076 | if (count == 0) |
3f542974 | 2077 | result = TIOCSER_TEMT; |
3f542974 PS |
2078 | |
2079 | if (copy_to_user(value, &result, sizeof(int))) | |
2080 | return -EFAULT; | |
2081 | return 0; | |
2082 | } | |
2083 | ||
3f542974 PS |
2084 | /***************************************************************************** |
2085 | * mos7840_get_serial_info | |
2086 | * function to get information about serial port | |
2087 | *****************************************************************************/ | |
2088 | ||
2089 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
97c4965d | 2090 | struct serial_struct __user *retinfo) |
3f542974 PS |
2091 | { |
2092 | struct serial_struct tmp; | |
2093 | ||
2094 | if (mos7840_port == NULL) | |
2095 | return -1; | |
2096 | ||
2097 | if (!retinfo) | |
2098 | return -EFAULT; | |
2099 | ||
2100 | memset(&tmp, 0, sizeof(tmp)); | |
2101 | ||
2102 | tmp.type = PORT_16550A; | |
2103 | tmp.line = mos7840_port->port->serial->minor; | |
2104 | tmp.port = mos7840_port->port->number; | |
2105 | tmp.irq = 0; | |
2106 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2107 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2108 | tmp.baud_base = 9600; | |
2109 | tmp.close_delay = 5 * HZ; | |
2110 | tmp.closing_wait = 30 * HZ; | |
2111 | ||
2112 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2113 | return -EFAULT; | |
2114 | return 0; | |
2115 | } | |
2116 | ||
2117 | /***************************************************************************** | |
2118 | * SerialIoctl | |
2119 | * this function handles any ioctl calls to the driver | |
2120 | *****************************************************************************/ | |
2121 | ||
00a0d0d6 | 2122 | static int mos7840_ioctl(struct tty_struct *tty, |
3f542974 PS |
2123 | unsigned int cmd, unsigned long arg) |
2124 | { | |
95da310e | 2125 | struct usb_serial_port *port = tty->driver_data; |
97c4965d | 2126 | void __user *argp = (void __user *)arg; |
3f542974 | 2127 | struct moschip_port *mos7840_port; |
3f542974 | 2128 | |
9c134a14 | 2129 | if (mos7840_port_paranoia_check(port, __func__)) |
3f542974 | 2130 | return -1; |
3f542974 PS |
2131 | |
2132 | mos7840_port = mos7840_get_port_private(port); | |
3f542974 PS |
2133 | |
2134 | if (mos7840_port == NULL) | |
2135 | return -1; | |
2136 | ||
9c134a14 | 2137 | dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); |
3f542974 PS |
2138 | |
2139 | switch (cmd) { | |
2140 | /* return number of bytes available */ | |
2141 | ||
3f542974 | 2142 | case TIOCSERGETLSR: |
9c134a14 | 2143 | dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); |
95da310e | 2144 | return mos7840_get_lsr_info(tty, argp); |
3f542974 | 2145 | |
3f542974 | 2146 | case TIOCGSERIAL: |
9c134a14 | 2147 | dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); |
97c4965d | 2148 | return mos7840_get_serial_info(mos7840_port, argp); |
3f542974 PS |
2149 | |
2150 | case TIOCSSERIAL: | |
9c134a14 | 2151 | dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); |
3f542974 | 2152 | break; |
3f542974 PS |
2153 | default: |
2154 | break; | |
2155 | } | |
3f542974 PS |
2156 | return -ENOIOCTLCMD; |
2157 | } | |
2158 | ||
0eafe4de D |
2159 | static int mos7810_check(struct usb_serial *serial) |
2160 | { | |
2161 | int i, pass_count = 0; | |
15ee89c3 | 2162 | u8 *buf; |
0eafe4de D |
2163 | __u16 data = 0, mcr_data = 0; |
2164 | __u16 test_pattern = 0x55AA; | |
15ee89c3 JH |
2165 | int res; |
2166 | ||
2167 | buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); | |
2168 | if (!buf) | |
2169 | return 0; /* failed to identify 7810 */ | |
0eafe4de D |
2170 | |
2171 | /* Store MCR setting */ | |
15ee89c3 | 2172 | res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
0eafe4de | 2173 | MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, |
15ee89c3 JH |
2174 | buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); |
2175 | if (res == VENDOR_READ_LENGTH) | |
2176 | mcr_data = *buf; | |
0eafe4de D |
2177 | |
2178 | for (i = 0; i < 16; i++) { | |
2179 | /* Send the 1-bit test pattern out to MCS7810 test pin */ | |
2180 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
2181 | MCS_WRREQ, MCS_WR_RTYPE, | |
2182 | (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), | |
2183 | MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); | |
2184 | ||
2185 | /* Read the test pattern back */ | |
15ee89c3 JH |
2186 | res = usb_control_msg(serial->dev, |
2187 | usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, | |
2188 | MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, | |
2189 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); | |
2190 | if (res == VENDOR_READ_LENGTH) | |
2191 | data = *buf; | |
0eafe4de D |
2192 | |
2193 | /* If this is a MCS7810 device, both test patterns must match */ | |
2194 | if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) | |
2195 | break; | |
2196 | ||
2197 | pass_count++; | |
2198 | } | |
2199 | ||
2200 | /* Restore MCR setting */ | |
2201 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, | |
2202 | MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, | |
2203 | 0, MOS_WDR_TIMEOUT); | |
2204 | ||
15ee89c3 JH |
2205 | kfree(buf); |
2206 | ||
0eafe4de D |
2207 | if (pass_count == 16) |
2208 | return 1; | |
2209 | ||
2210 | return 0; | |
2211 | } | |
2212 | ||
ed183fba JH |
2213 | static int mos7840_probe(struct usb_serial *serial, |
2214 | const struct usb_device_id *id) | |
3f542974 | 2215 | { |
d802afca | 2216 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); |
15ee89c3 | 2217 | u8 *buf; |
ed183fba JH |
2218 | int device_type; |
2219 | ||
2220 | if (product == MOSCHIP_DEVICE_ID_7810 || | |
2221 | product == MOSCHIP_DEVICE_ID_7820) { | |
2222 | device_type = product; | |
2223 | goto out; | |
2224 | } | |
093ea2d3 | 2225 | |
15ee89c3 | 2226 | buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); |
ed183fba JH |
2227 | if (!buf) |
2228 | return -ENOMEM; | |
2229 | ||
2230 | usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
15ee89c3 JH |
2231 | MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, |
2232 | VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); | |
093ea2d3 | 2233 | |
ed183fba JH |
2234 | /* For a MCS7840 device GPIO0 must be set to 1 */ |
2235 | if (buf[0] & 0x01) | |
2236 | device_type = MOSCHIP_DEVICE_ID_7840; | |
2237 | else if (mos7810_check(serial)) | |
2238 | device_type = MOSCHIP_DEVICE_ID_7810; | |
2239 | else | |
2240 | device_type = MOSCHIP_DEVICE_ID_7820; | |
2241 | ||
2242 | kfree(buf); | |
2243 | out: | |
499c97f9 | 2244 | usb_set_serial_data(serial, (void *)(unsigned long)device_type); |
ed183fba JH |
2245 | |
2246 | return 0; | |
2247 | } | |
2248 | ||
2249 | static int mos7840_calc_num_ports(struct usb_serial *serial) | |
2250 | { | |
499c97f9 | 2251 | int device_type = (unsigned long)usb_get_serial_data(serial); |
ed183fba | 2252 | int mos7840_num_ports; |
093ea2d3 | 2253 | |
0eafe4de | 2254 | mos7840_num_ports = (device_type >> 4) & 0x000F; |
0eafe4de | 2255 | |
3f542974 PS |
2256 | return mos7840_num_ports; |
2257 | } | |
2258 | ||
298c324c JH |
2259 | static int mos7840_attach(struct usb_serial *serial) |
2260 | { | |
2261 | if (serial->num_bulk_in < serial->num_ports || | |
3a46eaa0 JH |
2262 | serial->num_bulk_out < serial->num_ports || |
2263 | serial->num_interrupt_in < 1) { | |
298c324c JH |
2264 | dev_err(&serial->interface->dev, "missing endpoints\n"); |
2265 | return -ENODEV; | |
2266 | } | |
2267 | ||
2268 | return 0; | |
2269 | } | |
2270 | ||
80c00750 | 2271 | static int mos7840_port_probe(struct usb_serial_port *port) |
3f542974 | 2272 | { |
80c00750 | 2273 | struct usb_serial *serial = port->serial; |
499c97f9 | 2274 | int device_type = (unsigned long)usb_get_serial_data(serial); |
3f542974 | 2275 | struct moschip_port *mos7840_port; |
80c00750 JH |
2276 | int status; |
2277 | int pnum; | |
3f542974 | 2278 | __u16 Data; |
3f542974 | 2279 | |
3f542974 PS |
2280 | /* we set up the pointers to the endpoints in the mos7840_open * |
2281 | * function, as the structures aren't created yet. */ | |
2282 | ||
80c00750 JH |
2283 | pnum = port->number - serial->minor; |
2284 | ||
ae685eff JH |
2285 | dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); |
2286 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
2287 | if (mos7840_port == NULL) { | |
2288 | dev_err(&port->dev, "%s - Out of memory\n", __func__); | |
2289 | return -ENOMEM; | |
2290 | } | |
3f542974 | 2291 | |
ae685eff JH |
2292 | /* Initialize all port interrupt end point to port 0 int |
2293 | * endpoint. Our device has only one interrupt end point | |
2294 | * common to all port */ | |
2295 | ||
2296 | mos7840_port->port = port; | |
2297 | mos7840_set_port_private(port, mos7840_port); | |
2298 | spin_lock_init(&mos7840_port->pool_lock); | |
2299 | ||
2300 | /* minor is not initialised until later by | |
2301 | * usb-serial.c:get_free_serial() and cannot therefore be used | |
2302 | * to index device instances */ | |
2303 | mos7840_port->port_num = pnum + 1; | |
2304 | dev_dbg(&port->dev, "port->number = %d\n", port->number); | |
2305 | dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor); | |
2306 | dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); | |
2307 | dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor); | |
2308 | ||
2309 | if (mos7840_port->port_num == 1) { | |
2310 | mos7840_port->SpRegOffset = 0x0; | |
2311 | mos7840_port->ControlRegOffset = 0x1; | |
2312 | mos7840_port->DcrRegOffset = 0x4; | |
2313 | } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { | |
2314 | mos7840_port->SpRegOffset = 0x8; | |
2315 | mos7840_port->ControlRegOffset = 0x9; | |
2316 | mos7840_port->DcrRegOffset = 0x16; | |
2317 | } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { | |
2318 | mos7840_port->SpRegOffset = 0xa; | |
2319 | mos7840_port->ControlRegOffset = 0xb; | |
2320 | mos7840_port->DcrRegOffset = 0x19; | |
2321 | } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { | |
2322 | mos7840_port->SpRegOffset = 0xa; | |
2323 | mos7840_port->ControlRegOffset = 0xb; | |
2324 | mos7840_port->DcrRegOffset = 0x19; | |
2325 | } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { | |
2326 | mos7840_port->SpRegOffset = 0xc; | |
2327 | mos7840_port->ControlRegOffset = 0xd; | |
2328 | mos7840_port->DcrRegOffset = 0x1c; | |
2329 | } | |
2330 | mos7840_dump_serial_port(port, mos7840_port); | |
2331 | mos7840_set_port_private(port, mos7840_port); | |
2332 | ||
2333 | /* enable rx_disable bit in control register */ | |
2334 | status = mos7840_get_reg_sync(port, | |
2335 | mos7840_port->ControlRegOffset, &Data); | |
2336 | if (status < 0) { | |
2337 | dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); | |
2338 | goto out; | |
2339 | } else | |
2340 | dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); | |
2341 | Data |= 0x08; /* setting driver done bit */ | |
2342 | Data |= 0x04; /* sp1_bit to have cts change reflect in | |
2343 | modem status reg */ | |
2344 | ||
2345 | /* Data |= 0x20; //rx_disable bit */ | |
2346 | status = mos7840_set_reg_sync(port, | |
2347 | mos7840_port->ControlRegOffset, Data); | |
2348 | if (status < 0) { | |
2349 | dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); | |
2350 | goto out; | |
2351 | } else | |
2352 | dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); | |
2353 | ||
2354 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 | |
2355 | and 0x24 in DCR3 */ | |
2356 | Data = 0x01; | |
2357 | status = mos7840_set_reg_sync(port, | |
2358 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); | |
2359 | if (status < 0) { | |
2360 | dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); | |
2361 | goto out; | |
2362 | } else | |
2363 | dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); | |
3f542974 | 2364 | |
ae685eff JH |
2365 | Data = 0x05; |
2366 | status = mos7840_set_reg_sync(port, | |
2367 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); | |
2368 | if (status < 0) { | |
2369 | dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); | |
2370 | goto out; | |
2371 | } else | |
2372 | dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); | |
3f542974 | 2373 | |
ae685eff JH |
2374 | Data = 0x24; |
2375 | status = mos7840_set_reg_sync(port, | |
2376 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); | |
2377 | if (status < 0) { | |
2378 | dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); | |
2379 | goto out; | |
2380 | } else | |
2381 | dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); | |
3f542974 | 2382 | |
ae685eff JH |
2383 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
2384 | Data = 0x0; | |
2385 | status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); | |
2386 | if (status < 0) { | |
2387 | dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); | |
2388 | goto out; | |
2389 | } else | |
2390 | dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); | |
3f542974 | 2391 | |
ae685eff JH |
2392 | Data = 0x20; |
2393 | status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); | |
2394 | if (status < 0) { | |
2395 | dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); | |
2396 | goto error; | |
2397 | } else | |
2398 | dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); | |
3f542974 | 2399 | |
ae685eff JH |
2400 | /* write value 0x0 to scratchpad register */ |
2401 | Data = 0x00; | |
2402 | status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); | |
2403 | if (status < 0) { | |
2404 | dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); | |
2405 | goto out; | |
2406 | } else | |
2407 | dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); | |
2408 | ||
2409 | /* Zero Length flag register */ | |
2410 | if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { | |
2411 | Data = 0xff; | |
80c00750 | 2412 | status = mos7840_set_reg_sync(port, |
ae685eff JH |
2413 | (__u16) (ZLP_REG1 + |
2414 | ((__u16)mos7840_port->port_num)), Data); | |
2415 | dev_dbg(&port->dev, "ZLIP offset %x\n", | |
2416 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); | |
3f542974 | 2417 | if (status < 0) { |
ae685eff JH |
2418 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); |
2419 | goto out; | |
3f542974 | 2420 | } else |
ae685eff JH |
2421 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); |
2422 | } else { | |
2423 | Data = 0xff; | |
80c00750 | 2424 | status = mos7840_set_reg_sync(port, |
ae685eff JH |
2425 | (__u16) (ZLP_REG1 + |
2426 | ((__u16)mos7840_port->port_num) - 0x1), Data); | |
2427 | dev_dbg(&port->dev, "ZLIP offset %x\n", | |
2428 | (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); | |
3f542974 | 2429 | if (status < 0) { |
ae685eff JH |
2430 | dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); |
2431 | goto out; | |
3f542974 | 2432 | } else |
ae685eff | 2433 | dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); |
3f542974 | 2434 | |
ae685eff JH |
2435 | } |
2436 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2437 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); | |
2438 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), | |
2439 | GFP_KERNEL); | |
2440 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || | |
2441 | !mos7840_port->dr) { | |
2442 | status = -ENOMEM; | |
2443 | goto error; | |
2444 | } | |
0eafe4de | 2445 | |
ae685eff | 2446 | mos7840_port->has_led = false; |
0eafe4de | 2447 | |
ae685eff JH |
2448 | /* Initialize LED timers */ |
2449 | if (device_type == MOSCHIP_DEVICE_ID_7810) { | |
2450 | mos7840_port->has_led = true; | |
0eafe4de | 2451 | |
62a2cfc2 JH |
2452 | mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); |
2453 | mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), | |
2454 | GFP_KERNEL); | |
2455 | if (!mos7840_port->led_urb || !mos7840_port->led_dr) { | |
2456 | status = -ENOMEM; | |
2457 | goto error; | |
2458 | } | |
2459 | ||
ae685eff JH |
2460 | init_timer(&mos7840_port->led_timer1); |
2461 | mos7840_port->led_timer1.function = mos7840_led_off; | |
2462 | mos7840_port->led_timer1.expires = | |
2463 | jiffies + msecs_to_jiffies(LED_ON_MS); | |
2464 | mos7840_port->led_timer1.data = (unsigned long)mos7840_port; | |
0eafe4de | 2465 | |
ae685eff JH |
2466 | init_timer(&mos7840_port->led_timer2); |
2467 | mos7840_port->led_timer2.function = mos7840_led_flag_off; | |
2468 | mos7840_port->led_timer2.expires = | |
2469 | jiffies + msecs_to_jiffies(LED_OFF_MS); | |
2470 | mos7840_port->led_timer2.data = (unsigned long)mos7840_port; | |
0eafe4de | 2471 | |
ae685eff JH |
2472 | /* Turn off LED */ |
2473 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); | |
2474 | } | |
2475 | out: | |
80c00750 JH |
2476 | if (pnum == serial->num_ports - 1) { |
2477 | /* Zero Length flag enable */ | |
2478 | Data = 0x0f; | |
2479 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); | |
2480 | if (status < 0) { | |
2481 | dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); | |
2482 | goto error; | |
2483 | } else | |
2484 | dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); | |
2485 | ||
2486 | /* setting configuration feature to one */ | |
2487 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
2488 | 0x03, 0x00, 0x01, 0x00, NULL, 0x00, | |
2489 | MOS_WDR_TIMEOUT); | |
2490 | } | |
3f542974 | 2491 | return 0; |
0de9a702 | 2492 | error: |
62a2cfc2 JH |
2493 | kfree(mos7840_port->led_dr); |
2494 | usb_free_urb(mos7840_port->led_urb); | |
80c00750 JH |
2495 | kfree(mos7840_port->dr); |
2496 | kfree(mos7840_port->ctrl_buf); | |
2497 | usb_free_urb(mos7840_port->control_urb); | |
2498 | kfree(mos7840_port); | |
0de9a702 | 2499 | |
0de9a702 | 2500 | return status; |
3f542974 PS |
2501 | } |
2502 | ||
80c00750 | 2503 | static int mos7840_port_remove(struct usb_serial_port *port) |
3f542974 | 2504 | { |
3f542974 | 2505 | struct moschip_port *mos7840_port; |
3f542974 | 2506 | |
80c00750 | 2507 | mos7840_port = mos7840_get_port_private(port); |
3f542974 | 2508 | |
80c00750 JH |
2509 | if (mos7840_port->has_led) { |
2510 | /* Turn off LED */ | |
2511 | mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); | |
3f542974 | 2512 | |
80c00750 JH |
2513 | del_timer_sync(&mos7840_port->led_timer1); |
2514 | del_timer_sync(&mos7840_port->led_timer2); | |
62a2cfc2 JH |
2515 | |
2516 | usb_kill_urb(mos7840_port->led_urb); | |
2517 | usb_free_urb(mos7840_port->led_urb); | |
2518 | kfree(mos7840_port->led_dr); | |
f9c99bb8 | 2519 | } |
80c00750 JH |
2520 | usb_kill_urb(mos7840_port->control_urb); |
2521 | usb_free_urb(mos7840_port->control_urb); | |
2522 | kfree(mos7840_port->ctrl_buf); | |
2523 | kfree(mos7840_port->dr); | |
2524 | kfree(mos7840_port); | |
f9c99bb8 | 2525 | |
80c00750 | 2526 | return 0; |
3f542974 PS |
2527 | } |
2528 | ||
2529 | static struct usb_serial_driver moschip7840_4port_device = { | |
2530 | .driver = { | |
2531 | .owner = THIS_MODULE, | |
2532 | .name = "mos7840", | |
2533 | }, | |
2534 | .description = DRIVER_DESC, | |
68e24113 | 2535 | .id_table = id_table, |
3f542974 | 2536 | .num_ports = 4, |
3f542974 PS |
2537 | .open = mos7840_open, |
2538 | .close = mos7840_close, | |
2539 | .write = mos7840_write, | |
2540 | .write_room = mos7840_write_room, | |
2541 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2542 | .throttle = mos7840_throttle, | |
2543 | .unthrottle = mos7840_unthrottle, | |
2544 | .calc_num_ports = mos7840_calc_num_ports, | |
ed183fba | 2545 | .probe = mos7840_probe, |
3f542974 PS |
2546 | .ioctl = mos7840_ioctl, |
2547 | .set_termios = mos7840_set_termios, | |
2548 | .break_ctl = mos7840_break, | |
2549 | .tiocmget = mos7840_tiocmget, | |
2550 | .tiocmset = mos7840_tiocmset, | |
0c613371 | 2551 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
8c1a07ff | 2552 | .get_icount = usb_serial_generic_get_icount, |
298c324c | 2553 | .attach = mos7840_attach, |
80c00750 JH |
2554 | .port_probe = mos7840_port_probe, |
2555 | .port_remove = mos7840_port_remove, | |
3f542974 PS |
2556 | .read_bulk_callback = mos7840_bulk_in_callback, |
2557 | .read_int_callback = mos7840_interrupt_callback, | |
2558 | }; | |
2559 | ||
4d2a7aff AS |
2560 | static struct usb_serial_driver * const serial_drivers[] = { |
2561 | &moschip7840_4port_device, NULL | |
2562 | }; | |
2563 | ||
68e24113 | 2564 | module_usb_serial_driver(serial_drivers, id_table); |
3f542974 | 2565 | |
3f542974 PS |
2566 | MODULE_DESCRIPTION(DRIVER_DESC); |
2567 | MODULE_LICENSE("GPL"); |