Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 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> |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 36 | #include <linux/uaccess.h> |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 37 | |
| 38 | /* |
| 39 | * Version Information |
| 40 | */ |
Tony Cook | 37768ad | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 41 | #define DRIVER_VERSION "1.3.2" |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 42 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
| 43 | |
| 44 | /* |
| 45 | * 16C50 UART register defines |
| 46 | */ |
| 47 | |
| 48 | #define LCR_BITS_5 0x00 /* 5 bits/char */ |
| 49 | #define LCR_BITS_6 0x01 /* 6 bits/char */ |
| 50 | #define LCR_BITS_7 0x02 /* 7 bits/char */ |
| 51 | #define LCR_BITS_8 0x03 /* 8 bits/char */ |
| 52 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ |
| 53 | |
| 54 | #define LCR_STOP_1 0x00 /* 1 stop bit */ |
| 55 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ |
| 56 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ |
| 57 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ |
| 58 | |
| 59 | #define LCR_PAR_NONE 0x00 /* No parity */ |
| 60 | #define LCR_PAR_ODD 0x08 /* Odd parity */ |
| 61 | #define LCR_PAR_EVEN 0x18 /* Even parity */ |
| 62 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ |
| 63 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ |
| 64 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ |
| 65 | |
| 66 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ |
| 67 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ |
| 68 | |
| 69 | #define MCR_DTR 0x01 /* Assert DTR */ |
| 70 | #define MCR_RTS 0x02 /* Assert RTS */ |
| 71 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ |
| 72 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ |
| 73 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ |
| 74 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ |
| 75 | |
| 76 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ |
| 77 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ |
| 78 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ |
| 79 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ |
| 80 | |
| 81 | /* |
| 82 | * Defines used for sending commands to port |
| 83 | */ |
| 84 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 85 | #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ |
| 86 | #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 87 | |
| 88 | #define MOS_PORT1 0x0200 |
| 89 | #define MOS_PORT2 0x0300 |
| 90 | #define MOS_VENREG 0x0000 |
| 91 | #define MOS_MAX_PORT 0x02 |
| 92 | #define MOS_WRITE 0x0E |
| 93 | #define MOS_READ 0x0D |
| 94 | |
| 95 | /* Requests */ |
| 96 | #define MCS_RD_RTYPE 0xC0 |
| 97 | #define MCS_WR_RTYPE 0x40 |
| 98 | #define MCS_RDREQ 0x0D |
| 99 | #define MCS_WRREQ 0x0E |
| 100 | #define MCS_CTRL_TIMEOUT 500 |
| 101 | #define VENDOR_READ_LENGTH (0x01) |
| 102 | |
| 103 | #define MAX_NAME_LEN 64 |
| 104 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 105 | #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
| 106 | #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 107 | |
| 108 | /* For higher baud Rates use TIOCEXBAUD */ |
| 109 | #define TIOCEXBAUD 0x5462 |
| 110 | |
| 111 | /* vendor id and device id defines */ |
| 112 | |
David Ludlow | 11e1abb | 2008-02-25 17:30:52 -0500 | [diff] [blame] | 113 | /* The native mos7840/7820 component */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 114 | #define USB_VENDOR_ID_MOSCHIP 0x9710 |
| 115 | #define MOSCHIP_DEVICE_ID_7840 0x7840 |
| 116 | #define MOSCHIP_DEVICE_ID_7820 0x7820 |
David Ludlow | 11e1abb | 2008-02-25 17:30:52 -0500 | [diff] [blame] | 117 | /* The native component can have its vendor/device id's overridden |
| 118 | * in vendor-specific implementations. Such devices can be handled |
| 119 | * by making a change here, in moschip_port_id_table, and in |
| 120 | * moschip_id_table_combined |
| 121 | */ |
| 122 | #define USB_VENDOR_ID_BANDB 0x0856 |
| 123 | #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 |
| 124 | #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 125 | |
Tony Cook | e9b8cff | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 126 | /* This driver also supports the ATEN UC2324 device since it is mos7840 based |
| 127 | * - if I knew the device id it would also support the ATEN UC2322 */ |
| 128 | #define USB_VENDOR_ID_ATENINTL 0x0557 |
| 129 | #define ATENINTL_DEVICE_ID_UC2324 0x2011 |
| 130 | |
David Ludlow | 11e1abb | 2008-02-25 17:30:52 -0500 | [diff] [blame] | 131 | /* Interrupt Routine Defines */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 132 | |
| 133 | #define SERIAL_IIR_RLS 0x06 |
| 134 | #define SERIAL_IIR_MS 0x00 |
| 135 | |
| 136 | /* |
| 137 | * Emulation of the bit mask on the LINE STATUS REGISTER. |
| 138 | */ |
| 139 | #define SERIAL_LSR_DR 0x0001 |
| 140 | #define SERIAL_LSR_OE 0x0002 |
| 141 | #define SERIAL_LSR_PE 0x0004 |
| 142 | #define SERIAL_LSR_FE 0x0008 |
| 143 | #define SERIAL_LSR_BI 0x0010 |
| 144 | |
| 145 | #define MOS_MSR_DELTA_CTS 0x10 |
| 146 | #define MOS_MSR_DELTA_DSR 0x20 |
| 147 | #define MOS_MSR_DELTA_RI 0x40 |
| 148 | #define MOS_MSR_DELTA_CD 0x80 |
| 149 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 150 | /* Serial Port register Address */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 151 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
| 152 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) |
| 153 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) |
| 154 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) |
| 155 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) |
| 156 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) |
| 157 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) |
| 158 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) |
| 159 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) |
| 160 | |
| 161 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) |
| 162 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) |
| 163 | |
| 164 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) |
| 165 | |
| 166 | /* |
| 167 | * URB POOL related defines |
| 168 | */ |
| 169 | #define NUM_URBS 16 /* URB Count */ |
| 170 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ |
| 171 | |
| 172 | |
| 173 | static struct usb_device_id moschip_port_id_table[] = { |
| 174 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
| 175 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, |
David Ludlow | 11e1abb | 2008-02-25 17:30:52 -0500 | [diff] [blame] | 176 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
| 177 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
Tony Cook | e9b8cff | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 178 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 179 | {} /* terminating entry */ |
| 180 | }; |
| 181 | |
| 182 | static __devinitdata struct usb_device_id moschip_id_table_combined[] = { |
| 183 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
| 184 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, |
David Ludlow | 11e1abb | 2008-02-25 17:30:52 -0500 | [diff] [blame] | 185 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
| 186 | {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
Tony Cook | e9b8cff | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 187 | {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 188 | {} /* terminating entry */ |
| 189 | }; |
| 190 | |
| 191 | MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); |
| 192 | |
| 193 | /* This structure holds all of the local port information */ |
| 194 | |
| 195 | struct moschip_port { |
| 196 | int port_num; /*Actual port number in the device(1,2,etc) */ |
| 197 | struct urb *write_urb; /* write URB for this port */ |
| 198 | struct urb *read_urb; /* read URB for this port */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 199 | struct urb *int_urb; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 200 | __u8 shadowLCR; /* last LCR value received */ |
| 201 | __u8 shadowMCR; /* last MCR value received */ |
| 202 | char open; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 203 | char open_ports; |
| 204 | char zombie; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 205 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
| 206 | wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ |
| 207 | int delta_msr_cond; |
| 208 | struct async_icount icount; |
| 209 | struct usb_serial_port *port; /* loop back to the owner of this object */ |
| 210 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 211 | /* Offsets */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 212 | __u8 SpRegOffset; |
| 213 | __u8 ControlRegOffset; |
| 214 | __u8 DcrRegOffset; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 215 | /* for processing control URBS in interrupt context */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 216 | struct urb *control_urb; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 217 | struct usb_ctrlrequest *dr; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 218 | char *ctrl_buf; |
| 219 | int MsrLsr; |
| 220 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 221 | spinlock_t pool_lock; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 222 | struct urb *write_urb_pool[NUM_URBS]; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 223 | char busy[NUM_URBS]; |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 224 | bool read_urb_busy; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 225 | }; |
| 226 | |
| 227 | |
| 228 | static int debug; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 229 | |
| 230 | /* |
| 231 | * mos7840_set_reg_sync |
| 232 | * To set the Control register by calling usb_fill_control_urb function |
| 233 | * by passing usb_sndctrlpipe function as parameter. |
| 234 | */ |
| 235 | |
| 236 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, |
| 237 | __u16 val) |
| 238 | { |
| 239 | struct usb_device *dev = port->serial->dev; |
| 240 | val = val & 0x00ff; |
| 241 | dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); |
| 242 | |
| 243 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
| 244 | MCS_WR_RTYPE, val, reg, NULL, 0, |
| 245 | MOS_WDR_TIMEOUT); |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * mos7840_get_reg_sync |
| 250 | * To set the Uart register by calling usb_fill_control_urb function by |
| 251 | * passing usb_rcvctrlpipe function as parameter. |
| 252 | */ |
| 253 | |
| 254 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 255 | __u16 *val) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 256 | { |
| 257 | struct usb_device *dev = port->serial->dev; |
| 258 | int ret = 0; |
| 259 | |
| 260 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
| 261 | MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, |
| 262 | MOS_WDR_TIMEOUT); |
| 263 | dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); |
| 264 | *val = (*val) & 0x00ff; |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * mos7840_set_uart_reg |
| 270 | * To set the Uart register by calling usb_fill_control_urb function by |
| 271 | * passing usb_sndctrlpipe function as parameter. |
| 272 | */ |
| 273 | |
| 274 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, |
| 275 | __u16 val) |
| 276 | { |
| 277 | |
| 278 | struct usb_device *dev = port->serial->dev; |
| 279 | val = val & 0x00ff; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 280 | /* For the UART control registers, the application number need |
| 281 | to be Or'ed */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 282 | if (port->serial->num_ports == 4) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 283 | val |= (((__u16) port->number - |
| 284 | (__u16) (port->serial->minor)) + 1) << 8; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 285 | dbg("mos7840_set_uart_reg application number is %x\n", val); |
| 286 | } else { |
| 287 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 288 | val |= (((__u16) port->number - |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 289 | (__u16) (port->serial->minor)) + 1) << 8; |
| 290 | dbg("mos7840_set_uart_reg application number is %x\n", |
| 291 | val); |
| 292 | } else { |
| 293 | val |= |
| 294 | (((__u16) port->number - |
| 295 | (__u16) (port->serial->minor)) + 2) << 8; |
| 296 | dbg("mos7840_set_uart_reg application number is %x\n", |
| 297 | val); |
| 298 | } |
| 299 | } |
| 300 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
| 301 | MCS_WR_RTYPE, val, reg, NULL, 0, |
| 302 | MOS_WDR_TIMEOUT); |
| 303 | |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * mos7840_get_uart_reg |
| 308 | * To set the Control register by calling usb_fill_control_urb function |
| 309 | * by passing usb_rcvctrlpipe function as parameter. |
| 310 | */ |
| 311 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 312 | __u16 *val) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 313 | { |
| 314 | struct usb_device *dev = port->serial->dev; |
| 315 | int ret = 0; |
| 316 | __u16 Wval; |
| 317 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 318 | /* dbg("application number is %4x \n", |
| 319 | (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ |
| 320 | /* Wval is same as application number */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 321 | if (port->serial->num_ports == 4) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 322 | Wval = |
| 323 | (((__u16) port->number - (__u16) (port->serial->minor)) + |
| 324 | 1) << 8; |
| 325 | dbg("mos7840_get_uart_reg application number is %x\n", Wval); |
| 326 | } else { |
| 327 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 328 | Wval = (((__u16) port->number - |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 329 | (__u16) (port->serial->minor)) + 1) << 8; |
| 330 | dbg("mos7840_get_uart_reg application number is %x\n", |
| 331 | Wval); |
| 332 | } else { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 333 | Wval = (((__u16) port->number - |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 334 | (__u16) (port->serial->minor)) + 2) << 8; |
| 335 | dbg("mos7840_get_uart_reg application number is %x\n", |
| 336 | Wval); |
| 337 | } |
| 338 | } |
| 339 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
| 340 | MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, |
| 341 | MOS_WDR_TIMEOUT); |
| 342 | *val = (*val) & 0x00ff; |
| 343 | return ret; |
| 344 | } |
| 345 | |
| 346 | static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) |
| 347 | { |
| 348 | |
| 349 | dbg("***************************************\n"); |
| 350 | dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); |
| 351 | dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); |
| 352 | dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); |
| 353 | dbg("***************************************\n"); |
| 354 | |
| 355 | } |
| 356 | |
| 357 | /************************************************************************/ |
| 358 | /************************************************************************/ |
| 359 | /* I N T E R F A C E F U N C T I O N S */ |
| 360 | /* I N T E R F A C E F U N C T I O N S */ |
| 361 | /************************************************************************/ |
| 362 | /************************************************************************/ |
| 363 | |
| 364 | static inline void mos7840_set_port_private(struct usb_serial_port *port, |
| 365 | struct moschip_port *data) |
| 366 | { |
| 367 | usb_set_serial_port_data(port, (void *)data); |
| 368 | } |
| 369 | |
| 370 | static inline struct moschip_port *mos7840_get_port_private(struct |
| 371 | usb_serial_port |
| 372 | *port) |
| 373 | { |
| 374 | return (struct moschip_port *)usb_get_serial_port_data(port); |
| 375 | } |
| 376 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 377 | static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 378 | { |
| 379 | struct moschip_port *mos7840_port; |
| 380 | struct async_icount *icount; |
| 381 | mos7840_port = port; |
| 382 | icount = &mos7840_port->icount; |
| 383 | if (new_msr & |
| 384 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | |
| 385 | MOS_MSR_DELTA_CD)) { |
| 386 | icount = &mos7840_port->icount; |
| 387 | |
| 388 | /* update input line counters */ |
| 389 | if (new_msr & MOS_MSR_DELTA_CTS) { |
| 390 | icount->cts++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 391 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 392 | } |
| 393 | if (new_msr & MOS_MSR_DELTA_DSR) { |
| 394 | icount->dsr++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 395 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 396 | } |
| 397 | if (new_msr & MOS_MSR_DELTA_CD) { |
| 398 | icount->dcd++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 399 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 400 | } |
| 401 | if (new_msr & MOS_MSR_DELTA_RI) { |
| 402 | icount->rng++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 403 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 404 | } |
| 405 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 406 | } |
| 407 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 408 | static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 409 | { |
| 410 | struct async_icount *icount; |
| 411 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 412 | dbg("%s - %02x", __func__, new_lsr); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 413 | |
| 414 | if (new_lsr & SERIAL_LSR_BI) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 415 | /* |
| 416 | * Parity and Framing errors only count if they |
| 417 | * occur exclusive of a break being |
| 418 | * received. |
| 419 | */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 420 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
| 421 | } |
| 422 | |
| 423 | /* update input line counters */ |
| 424 | icount = &port->icount; |
| 425 | if (new_lsr & SERIAL_LSR_BI) { |
| 426 | icount->brk++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 427 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 428 | } |
| 429 | if (new_lsr & SERIAL_LSR_OE) { |
| 430 | icount->overrun++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 431 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 432 | } |
| 433 | if (new_lsr & SERIAL_LSR_PE) { |
| 434 | icount->parity++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 435 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 436 | } |
| 437 | if (new_lsr & SERIAL_LSR_FE) { |
| 438 | icount->frame++; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 439 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 440 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /************************************************************************/ |
| 444 | /************************************************************************/ |
| 445 | /* U S B C A L L B A C K F U N C T I O N S */ |
| 446 | /* U S B C A L L B A C K F U N C T I O N S */ |
| 447 | /************************************************************************/ |
| 448 | /************************************************************************/ |
| 449 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 450 | static void mos7840_control_callback(struct urb *urb) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 451 | { |
| 452 | unsigned char *data; |
| 453 | struct moschip_port *mos7840_port; |
| 454 | __u8 regval = 0x0; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 455 | int result = 0; |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 456 | int status = urb->status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 457 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 458 | mos7840_port = urb->context; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 459 | |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 460 | switch (status) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 461 | case 0: |
| 462 | /* success */ |
| 463 | break; |
| 464 | case -ECONNRESET: |
| 465 | case -ENOENT: |
| 466 | case -ESHUTDOWN: |
| 467 | /* this urb is terminated, clean up */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 468 | dbg("%s - urb shutting down with status: %d", __func__, |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 469 | status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 470 | return; |
| 471 | default: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 472 | dbg("%s - nonzero urb status received: %d", __func__, |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 473 | status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 474 | goto exit; |
| 475 | } |
| 476 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 477 | dbg("%s urb buffer size is %d\n", __func__, urb->actual_length); |
| 478 | dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 479 | mos7840_port->MsrLsr, mos7840_port->port_num); |
| 480 | data = urb->transfer_buffer; |
| 481 | regval = (__u8) data[0]; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 482 | dbg("%s data is %x\n", __func__, regval); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 483 | if (mos7840_port->MsrLsr == 0) |
| 484 | mos7840_handle_new_msr(mos7840_port, regval); |
| 485 | else if (mos7840_port->MsrLsr == 1) |
| 486 | mos7840_handle_new_lsr(mos7840_port, regval); |
| 487 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 488 | exit: |
| 489 | spin_lock(&mos7840_port->pool_lock); |
| 490 | if (!mos7840_port->zombie) |
| 491 | result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); |
| 492 | spin_unlock(&mos7840_port->pool_lock); |
| 493 | if (result) { |
| 494 | dev_err(&urb->dev->dev, |
| 495 | "%s - Error %d submitting interrupt urb\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 496 | __func__, result); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 497 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 501 | __u16 *val) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 502 | { |
| 503 | struct usb_device *dev = mcs->port->serial->dev; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 504 | struct usb_ctrlrequest *dr = mcs->dr; |
| 505 | unsigned char *buffer = mcs->ctrl_buf; |
| 506 | int ret; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 507 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 508 | dr->bRequestType = MCS_RD_RTYPE; |
| 509 | dr->bRequest = MCS_RDREQ; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 510 | dr->wValue = cpu_to_le16(Wval); /* 0 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 511 | dr->wIndex = cpu_to_le16(reg); |
| 512 | dr->wLength = cpu_to_le16(2); |
| 513 | |
| 514 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), |
| 515 | (unsigned char *)dr, buffer, 2, |
| 516 | mos7840_control_callback, mcs); |
| 517 | mcs->control_urb->transfer_buffer_length = 2; |
| 518 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | /***************************************************************************** |
| 523 | * mos7840_interrupt_callback |
| 524 | * this is the callback function for when we have received data on the |
| 525 | * interrupt endpoint. |
| 526 | *****************************************************************************/ |
| 527 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 528 | static void mos7840_interrupt_callback(struct urb *urb) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 529 | { |
| 530 | int result; |
| 531 | int length; |
| 532 | struct moschip_port *mos7840_port; |
| 533 | struct usb_serial *serial; |
| 534 | __u16 Data; |
| 535 | unsigned char *data; |
| 536 | __u8 sp[5], st; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 537 | int i, rv = 0; |
| 538 | __u16 wval, wreg = 0; |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 539 | int status = urb->status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 540 | |
| 541 | dbg("%s", " : Entering\n"); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 542 | |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 543 | switch (status) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 544 | case 0: |
| 545 | /* success */ |
| 546 | break; |
| 547 | case -ECONNRESET: |
| 548 | case -ENOENT: |
| 549 | case -ESHUTDOWN: |
| 550 | /* this urb is terminated, clean up */ |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 551 | dbg("%s - urb shutting down with status: %d", __func__, |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 552 | status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 553 | return; |
| 554 | default: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 555 | dbg("%s - nonzero urb status received: %d", __func__, |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 556 | status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 557 | goto exit; |
| 558 | } |
| 559 | |
| 560 | length = urb->actual_length; |
| 561 | data = urb->transfer_buffer; |
| 562 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 563 | serial = urb->context; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 564 | |
| 565 | /* Moschip get 5 bytes |
| 566 | * Byte 1 IIR Port 1 (port.number is 0) |
| 567 | * Byte 2 IIR Port 2 (port.number is 1) |
| 568 | * Byte 3 IIR Port 3 (port.number is 2) |
| 569 | * Byte 4 IIR Port 4 (port.number is 3) |
| 570 | * Byte 5 FIFO status for both */ |
| 571 | |
| 572 | if (length && length > 5) { |
| 573 | dbg("%s \n", "Wrong data !!!"); |
| 574 | return; |
| 575 | } |
| 576 | |
| 577 | sp[0] = (__u8) data[0]; |
| 578 | sp[1] = (__u8) data[1]; |
| 579 | sp[2] = (__u8) data[2]; |
| 580 | sp[3] = (__u8) data[3]; |
| 581 | st = (__u8) data[4]; |
| 582 | |
| 583 | for (i = 0; i < serial->num_ports; i++) { |
| 584 | mos7840_port = mos7840_get_port_private(serial->port[i]); |
| 585 | wval = |
| 586 | (((__u16) serial->port[i]->number - |
| 587 | (__u16) (serial->minor)) + 1) << 8; |
| 588 | if (mos7840_port->open) { |
| 589 | if (sp[i] & 0x01) { |
| 590 | dbg("SP%d No Interrupt !!!\n", i); |
| 591 | } else { |
| 592 | switch (sp[i] & 0x0f) { |
| 593 | case SERIAL_IIR_RLS: |
| 594 | dbg("Serial Port %d: Receiver status error or ", i); |
| 595 | dbg("address bit detected in 9-bit mode\n"); |
| 596 | mos7840_port->MsrLsr = 1; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 597 | wreg = LINE_STATUS_REGISTER; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 598 | break; |
| 599 | case SERIAL_IIR_MS: |
| 600 | dbg("Serial Port %d: Modem status change\n", i); |
| 601 | mos7840_port->MsrLsr = 0; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 602 | wreg = MODEM_STATUS_REGISTER; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 603 | break; |
| 604 | } |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 605 | spin_lock(&mos7840_port->pool_lock); |
| 606 | if (!mos7840_port->zombie) { |
| 607 | rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); |
| 608 | } else { |
| 609 | spin_unlock(&mos7840_port->pool_lock); |
| 610 | return; |
| 611 | } |
| 612 | spin_unlock(&mos7840_port->pool_lock); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 613 | } |
| 614 | } |
| 615 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 616 | if (!(rv < 0)) |
| 617 | /* the completion handler for the control urb will resubmit */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 618 | return; |
| 619 | exit: |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 620 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 621 | if (result) { |
| 622 | dev_err(&urb->dev->dev, |
| 623 | "%s - Error %d submitting interrupt urb\n", |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 624 | __func__, result); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 625 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, |
| 629 | const char *function) |
| 630 | { |
| 631 | if (!port) { |
| 632 | dbg("%s - port == NULL", function); |
| 633 | return -1; |
| 634 | } |
| 635 | if (!port->serial) { |
| 636 | dbg("%s - port->serial == NULL", function); |
| 637 | return -1; |
| 638 | } |
| 639 | |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | /* Inline functions to check the sanity of a pointer that is passed to us */ |
| 644 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, |
| 645 | const char *function) |
| 646 | { |
| 647 | if (!serial) { |
| 648 | dbg("%s - serial == NULL", function); |
| 649 | return -1; |
| 650 | } |
| 651 | if (!serial->type) { |
| 652 | dbg("%s - serial->type == NULL!", function); |
| 653 | return -1; |
| 654 | } |
| 655 | |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, |
| 660 | const char *function) |
| 661 | { |
| 662 | /* if no port was specified, or it fails a paranoia check */ |
| 663 | if (!port || |
| 664 | mos7840_port_paranoia_check(port, function) || |
| 665 | mos7840_serial_paranoia_check(port->serial, function)) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 666 | /* then say that we don't have a valid usb_serial thing, |
| 667 | * which will end up genrating -ENODEV return values */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 668 | return NULL; |
| 669 | } |
| 670 | |
| 671 | return port->serial; |
| 672 | } |
| 673 | |
| 674 | /***************************************************************************** |
| 675 | * mos7840_bulk_in_callback |
| 676 | * this is the callback function for when we have received data on the |
| 677 | * bulk in endpoint. |
| 678 | *****************************************************************************/ |
| 679 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 680 | static void mos7840_bulk_in_callback(struct urb *urb) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 681 | { |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 682 | int retval; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 683 | unsigned char *data; |
| 684 | struct usb_serial *serial; |
| 685 | struct usb_serial_port *port; |
| 686 | struct moschip_port *mos7840_port; |
| 687 | struct tty_struct *tty; |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 688 | int status = urb->status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 689 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 690 | mos7840_port = urb->context; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 691 | if (!mos7840_port) { |
| 692 | dbg("%s", "NULL mos7840_port pointer \n"); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 693 | mos7840_port->read_urb_busy = false; |
| 694 | return; |
| 695 | } |
| 696 | |
| 697 | if (status) { |
| 698 | dbg("nonzero read bulk status received: %d", status); |
| 699 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 700 | return; |
| 701 | } |
| 702 | |
| 703 | port = (struct usb_serial_port *)mos7840_port->port; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 704 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 705 | dbg("%s", "Port Paranoia failed \n"); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 706 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 707 | return; |
| 708 | } |
| 709 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 710 | serial = mos7840_get_usb_serial(port, __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 711 | if (!serial) { |
| 712 | dbg("%s\n", "Bad serial pointer "); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 713 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 714 | return; |
| 715 | } |
| 716 | |
| 717 | dbg("%s\n", "Entering... \n"); |
| 718 | |
| 719 | data = urb->transfer_buffer; |
| 720 | |
| 721 | dbg("%s", "Entering ........... \n"); |
| 722 | |
| 723 | if (urb->actual_length) { |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 724 | tty = tty_port_tty_get(&mos7840_port->port->port); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 725 | if (tty) { |
| 726 | tty_buffer_request_room(tty, urb->actual_length); |
| 727 | tty_insert_flip_string(tty, data, urb->actual_length); |
| 728 | dbg(" %s \n", data); |
| 729 | tty_flip_buffer_push(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 730 | tty_kref_put(tty); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 731 | } |
| 732 | mos7840_port->icount.rx += urb->actual_length; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 733 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 734 | dbg("mos7840_port->icount.rx is %d:\n", |
| 735 | mos7840_port->icount.rx); |
| 736 | } |
| 737 | |
| 738 | if (!mos7840_port->read_urb) { |
| 739 | dbg("%s", "URB KILLED !!!\n"); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 740 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 741 | return; |
| 742 | } |
| 743 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 744 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 745 | mos7840_port->read_urb->dev = serial->dev; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 746 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 747 | mos7840_port->read_urb_busy = true; |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 748 | retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 749 | |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 750 | if (retval) { |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 751 | dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); |
| 752 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 753 | } |
| 754 | } |
| 755 | |
| 756 | /***************************************************************************** |
| 757 | * mos7840_bulk_out_data_callback |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 758 | * this is the callback function for when we have finished sending |
| 759 | * serial data on the bulk out endpoint. |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 760 | *****************************************************************************/ |
| 761 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 762 | static void mos7840_bulk_out_data_callback(struct urb *urb) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 763 | { |
| 764 | struct moschip_port *mos7840_port; |
| 765 | struct tty_struct *tty; |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 766 | int status = urb->status; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 767 | int i; |
| 768 | |
Ming Lei | cdc9779 | 2008-02-24 18:41:47 +0800 | [diff] [blame] | 769 | mos7840_port = urb->context; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 770 | spin_lock(&mos7840_port->pool_lock); |
| 771 | for (i = 0; i < NUM_URBS; i++) { |
| 772 | if (urb == mos7840_port->write_urb_pool[i]) { |
| 773 | mos7840_port->busy[i] = 0; |
| 774 | break; |
| 775 | } |
| 776 | } |
| 777 | spin_unlock(&mos7840_port->pool_lock); |
| 778 | |
Greg Kroah-Hartman | 0643c72 | 2007-06-15 15:44:13 -0700 | [diff] [blame] | 779 | if (status) { |
| 780 | dbg("nonzero write bulk status received:%d\n", status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 781 | return; |
| 782 | } |
| 783 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 784 | if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 785 | dbg("%s", "Port Paranoia failed \n"); |
| 786 | return; |
| 787 | } |
| 788 | |
| 789 | dbg("%s \n", "Entering ........."); |
| 790 | |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 791 | tty = tty_port_tty_get(&mos7840_port->port->port); |
Jiri Slaby | b963a84 | 2007-02-10 01:44:55 -0800 | [diff] [blame] | 792 | if (tty && mos7840_port->open) |
| 793 | tty_wakeup(tty); |
Alan Cox | 4a90f09 | 2008-10-13 10:39:46 +0100 | [diff] [blame] | 794 | tty_kref_put(tty); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 795 | |
| 796 | } |
| 797 | |
| 798 | /************************************************************************/ |
| 799 | /* 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 */ |
| 800 | /************************************************************************/ |
| 801 | #ifdef MCSSerialProbe |
| 802 | static int mos7840_serial_probe(struct usb_serial *serial, |
| 803 | const struct usb_device_id *id) |
| 804 | { |
| 805 | |
| 806 | /*need to implement the mode_reg reading and updating\ |
| 807 | structures usb_serial_ device_type\ |
| 808 | (i.e num_ports, num_bulkin,bulkout etc) */ |
| 809 | /* Also we can update the changes attach */ |
| 810 | return 1; |
| 811 | } |
| 812 | #endif |
| 813 | |
| 814 | /***************************************************************************** |
| 815 | * mos7840_open |
| 816 | * this function is called by the tty driver when a port is opened |
| 817 | * If successful, we return 0 |
| 818 | * Otherwise we return a negative error number. |
| 819 | *****************************************************************************/ |
| 820 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 821 | static int mos7840_open(struct tty_struct *tty, |
| 822 | struct usb_serial_port *port, struct file *filp) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 823 | { |
| 824 | int response; |
| 825 | int j; |
| 826 | struct usb_serial *serial; |
| 827 | struct urb *urb; |
| 828 | __u16 Data; |
| 829 | int status; |
| 830 | struct moschip_port *mos7840_port; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 831 | struct moschip_port *port0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 832 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 833 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 834 | dbg("%s", "Port Paranoia failed \n"); |
| 835 | return -ENODEV; |
| 836 | } |
| 837 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 838 | serial = port->serial; |
| 839 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 840 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 841 | dbg("%s", "Serial Paranoia failed \n"); |
| 842 | return -ENODEV; |
| 843 | } |
| 844 | |
| 845 | mos7840_port = mos7840_get_port_private(port); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 846 | port0 = mos7840_get_port_private(serial->port[0]); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 847 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 848 | if (mos7840_port == NULL || port0 == NULL) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 849 | return -ENODEV; |
| 850 | |
| 851 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
| 852 | usb_clear_halt(serial->dev, port->read_urb->pipe); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 853 | port0->open_ports++; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 854 | |
| 855 | /* Initialising the write urb pool */ |
| 856 | for (j = 0; j < NUM_URBS; ++j) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 857 | urb = usb_alloc_urb(0, GFP_KERNEL); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 858 | mos7840_port->write_urb_pool[j] = urb; |
| 859 | |
| 860 | if (urb == NULL) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 861 | dev_err(&port->dev, "No more urbs???\n"); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 862 | continue; |
| 863 | } |
| 864 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 865 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
| 866 | GFP_KERNEL); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 867 | if (!urb->transfer_buffer) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 868 | usb_free_urb(urb); |
| 869 | mos7840_port->write_urb_pool[j] = NULL; |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 870 | dev_err(&port->dev, |
| 871 | "%s-out of memory for urb buffers.\n", |
| 872 | __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 873 | continue; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /***************************************************************************** |
| 878 | * Initialize MCS7840 -- Write Init values to corresponding Registers |
| 879 | * |
| 880 | * Register Index |
| 881 | * 1 : IER |
| 882 | * 2 : FCR |
| 883 | * 3 : LCR |
| 884 | * 4 : MCR |
| 885 | * |
| 886 | * 0x08 : SP1/2 Control Reg |
| 887 | *****************************************************************************/ |
| 888 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 889 | /* NEED to check the following Block */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 890 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 891 | Data = 0x0; |
| 892 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
| 893 | if (status < 0) { |
| 894 | dbg("Reading Spreg failed\n"); |
| 895 | return -1; |
| 896 | } |
| 897 | Data |= 0x80; |
| 898 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| 899 | if (status < 0) { |
| 900 | dbg("writing Spreg failed\n"); |
| 901 | return -1; |
| 902 | } |
| 903 | |
| 904 | Data &= ~0x80; |
| 905 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| 906 | if (status < 0) { |
| 907 | dbg("writing Spreg failed\n"); |
| 908 | return -1; |
| 909 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 910 | /* End of block to be checked */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 911 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 912 | Data = 0x0; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 913 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| 914 | &Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 915 | if (status < 0) { |
| 916 | dbg("Reading Controlreg failed\n"); |
| 917 | return -1; |
| 918 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 919 | Data |= 0x08; /* Driver done bit */ |
| 920 | Data |= 0x20; /* rx_disable */ |
| 921 | status = mos7840_set_reg_sync(port, |
| 922 | mos7840_port->ControlRegOffset, Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 923 | if (status < 0) { |
| 924 | dbg("writing Controlreg failed\n"); |
| 925 | return -1; |
| 926 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 927 | /* do register settings here */ |
| 928 | /* Set all regs to the device default values. */ |
| 929 | /*********************************** |
| 930 | * First Disable all interrupts. |
| 931 | ***********************************/ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 932 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 933 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| 934 | if (status < 0) { |
| 935 | dbg("disableing interrupts failed\n"); |
| 936 | return -1; |
| 937 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 938 | /* Set FIFO_CONTROL_REGISTER to the default value */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 939 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 940 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| 941 | if (status < 0) { |
| 942 | dbg("Writing FIFO_CONTROL_REGISTER failed\n"); |
| 943 | return -1; |
| 944 | } |
| 945 | |
| 946 | Data = 0xcf; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 947 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| 948 | if (status < 0) { |
| 949 | dbg("Writing FIFO_CONTROL_REGISTER failed\n"); |
| 950 | return -1; |
| 951 | } |
| 952 | |
| 953 | Data = 0x03; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 954 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 955 | mos7840_port->shadowLCR = Data; |
| 956 | |
| 957 | Data = 0x0b; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 958 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| 959 | mos7840_port->shadowMCR = Data; |
| 960 | |
| 961 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 962 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| 963 | mos7840_port->shadowLCR = Data; |
| 964 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 965 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 966 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 967 | |
| 968 | Data = 0x0c; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 969 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
| 970 | |
| 971 | Data = 0x0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 972 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
| 973 | |
| 974 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 975 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| 976 | |
| 977 | Data = Data & ~SERIAL_LCR_DLAB; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 978 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 979 | mos7840_port->shadowLCR = Data; |
| 980 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 981 | /* clearing Bulkin and Bulkout Fifo */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 982 | Data = 0x0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 983 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
| 984 | |
| 985 | Data = Data | 0x0c; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 986 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| 987 | |
| 988 | Data = Data & ~0x0c; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 989 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 990 | /* Finally enable all interrupts */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 991 | Data = 0x0c; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 992 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| 993 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 994 | /* clearing rx_disable */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 995 | Data = 0x0; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 996 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| 997 | &Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 998 | Data = Data & ~0x20; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 999 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
| 1000 | Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1001 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1002 | /* rx_negate */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1003 | Data = 0x0; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1004 | status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| 1005 | &Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1006 | Data = Data | 0x10; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1007 | status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
| 1008 | Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1009 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1010 | /* Check to see if we've set up our endpoint info yet * |
| 1011 | * (can't set it up in mos7840_startup as the structures * |
| 1012 | * were not set up at that time.) */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1013 | if (port0->open_ports == 1) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1014 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1015 | /* set up interrupt urb */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1016 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1017 | serial->dev, |
| 1018 | usb_rcvintpipe(serial->dev, |
| 1019 | serial->port[0]->interrupt_in_endpointAddress), |
| 1020 | serial->port[0]->interrupt_in_buffer, |
| 1021 | serial->port[0]->interrupt_in_urb-> |
| 1022 | transfer_buffer_length, |
| 1023 | mos7840_interrupt_callback, |
| 1024 | serial, |
| 1025 | serial->port[0]->interrupt_in_urb->interval); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1026 | |
| 1027 | /* start interrupt read for mos7840 * |
| 1028 | * will continue as long as mos7840 is connected */ |
| 1029 | |
| 1030 | response = |
| 1031 | usb_submit_urb(serial->port[0]->interrupt_in_urb, |
| 1032 | GFP_KERNEL); |
| 1033 | if (response) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1034 | dev_err(&port->dev, "%s - Error %d submitting " |
| 1035 | "interrupt urb\n", __func__, response); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | } |
| 1039 | |
| 1040 | } |
| 1041 | |
| 1042 | /* see if we've set up our endpoint info yet * |
| 1043 | * (can't set it up in mos7840_startup as the * |
| 1044 | * structures were not set up at that time.) */ |
| 1045 | |
| 1046 | dbg("port number is %d \n", port->number); |
| 1047 | dbg("serial number is %d \n", port->serial->minor); |
| 1048 | dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); |
| 1049 | dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); |
| 1050 | dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); |
| 1051 | dbg("port's number in the device is %d\n", mos7840_port->port_num); |
| 1052 | mos7840_port->read_urb = port->read_urb; |
| 1053 | |
| 1054 | /* set up our bulk in urb */ |
| 1055 | |
| 1056 | usb_fill_bulk_urb(mos7840_port->read_urb, |
| 1057 | serial->dev, |
| 1058 | usb_rcvbulkpipe(serial->dev, |
| 1059 | port->bulk_in_endpointAddress), |
| 1060 | port->bulk_in_buffer, |
| 1061 | mos7840_port->read_urb->transfer_buffer_length, |
| 1062 | mos7840_bulk_in_callback, mos7840_port); |
| 1063 | |
| 1064 | dbg("mos7840_open: bulkin endpoint is %d\n", |
| 1065 | port->bulk_in_endpointAddress); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1066 | mos7840_port->read_urb_busy = true; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1067 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
| 1068 | if (response) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1069 | dev_err(&port->dev, "%s - Error %d submitting control urb\n", |
| 1070 | __func__, response); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1071 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | /* initialize our wait queues */ |
| 1075 | init_waitqueue_head(&mos7840_port->wait_chase); |
| 1076 | init_waitqueue_head(&mos7840_port->delta_msr_wait); |
| 1077 | |
| 1078 | /* initialize our icount structure */ |
| 1079 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); |
| 1080 | |
| 1081 | /* initialize our port settings */ |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1082 | /* Must set to enable ints! */ |
| 1083 | mos7840_port->shadowMCR = MCR_MASTER_IE; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1084 | /* send a open port command */ |
| 1085 | mos7840_port->open = 1; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1086 | /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1087 | mos7840_port->icount.tx = 0; |
| 1088 | mos7840_port->icount.rx = 0; |
| 1089 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1090 | dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", |
| 1091 | serial, mos7840_port, port); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1092 | |
| 1093 | return 0; |
| 1094 | |
| 1095 | } |
| 1096 | |
| 1097 | /***************************************************************************** |
| 1098 | * mos7840_chars_in_buffer |
| 1099 | * this function is called by the tty driver when it wants to know how many |
| 1100 | * bytes of data we currently have outstanding in the port (data that has |
| 1101 | * been written, but hasn't made it out the port yet) |
| 1102 | * If successful, we return the number of bytes left to be written in the |
| 1103 | * system, |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1104 | * Otherwise we return zero. |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1105 | *****************************************************************************/ |
| 1106 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1107 | static int mos7840_chars_in_buffer(struct tty_struct *tty) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1108 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1109 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1110 | int i; |
| 1111 | int chars = 0; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1112 | unsigned long flags; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1113 | struct moschip_port *mos7840_port; |
| 1114 | |
| 1115 | dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); |
| 1116 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1117 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1118 | dbg("%s", "Invalid port \n"); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1119 | return 0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | mos7840_port = mos7840_get_port_private(port); |
| 1123 | if (mos7840_port == NULL) { |
| 1124 | dbg("%s \n", "mos7840_break:leaving ..........."); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1125 | return 0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1126 | } |
| 1127 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1128 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1129 | for (i = 0; i < NUM_URBS; ++i) |
| 1130 | if (mos7840_port->busy[i]) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1131 | chars += URB_TRANSFER_BUFFER_SIZE; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1132 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1133 | dbg("%s - returns %d", __func__, chars); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1134 | return chars; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1135 | |
| 1136 | } |
| 1137 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1138 | /***************************************************************************** |
| 1139 | * mos7840_close |
| 1140 | * this function is called by the tty driver when a port is closed |
| 1141 | *****************************************************************************/ |
| 1142 | |
Alan Cox | 335f851 | 2009-06-11 12:26:29 +0100 | [diff] [blame^] | 1143 | static void mos7840_close(struct usb_serial_port *port) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1144 | { |
| 1145 | struct usb_serial *serial; |
| 1146 | struct moschip_port *mos7840_port; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1147 | struct moschip_port *port0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1148 | int j; |
| 1149 | __u16 Data; |
| 1150 | |
| 1151 | dbg("%s\n", "mos7840_close:entering..."); |
| 1152 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1153 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1154 | dbg("%s", "Port Paranoia failed \n"); |
| 1155 | return; |
| 1156 | } |
| 1157 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1158 | serial = mos7840_get_usb_serial(port, __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1159 | if (!serial) { |
| 1160 | dbg("%s", "Serial Paranoia failed \n"); |
| 1161 | return; |
| 1162 | } |
| 1163 | |
| 1164 | mos7840_port = mos7840_get_port_private(port); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1165 | port0 = mos7840_get_port_private(serial->port[0]); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1166 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1167 | if (mos7840_port == NULL || port0 == NULL) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1168 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1169 | |
| 1170 | for (j = 0; j < NUM_URBS; ++j) |
| 1171 | usb_kill_urb(mos7840_port->write_urb_pool[j]); |
| 1172 | |
| 1173 | /* Freeing Write URBs */ |
| 1174 | for (j = 0; j < NUM_URBS; ++j) { |
| 1175 | if (mos7840_port->write_urb_pool[j]) { |
| 1176 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) |
| 1177 | kfree(mos7840_port->write_urb_pool[j]-> |
| 1178 | transfer_buffer); |
| 1179 | |
| 1180 | usb_free_urb(mos7840_port->write_urb_pool[j]); |
| 1181 | } |
| 1182 | } |
| 1183 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1184 | /* While closing port, shutdown all bulk read, write * |
| 1185 | * and interrupt read if they exists */ |
| 1186 | if (serial->dev) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1187 | if (mos7840_port->write_urb) { |
| 1188 | dbg("%s", "Shutdown bulk write\n"); |
| 1189 | usb_kill_urb(mos7840_port->write_urb); |
| 1190 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1191 | if (mos7840_port->read_urb) { |
| 1192 | dbg("%s", "Shutdown bulk read\n"); |
| 1193 | usb_kill_urb(mos7840_port->read_urb); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 1194 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1195 | } |
| 1196 | if ((&mos7840_port->control_urb)) { |
| 1197 | dbg("%s", "Shutdown control read\n"); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1198 | /*/ usb_kill_urb (mos7840_port->control_urb); */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1199 | } |
| 1200 | } |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1201 | /* if(mos7840_port->ctrl_buf != NULL) */ |
| 1202 | /* kfree(mos7840_port->ctrl_buf); */ |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1203 | port0->open_ports--; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1204 | dbg("mos7840_num_open_ports in close%d:in port%d\n", |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1205 | port0->open_ports, port->number); |
| 1206 | if (port0->open_ports == 0) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1207 | if (serial->port[0]->interrupt_in_urb) { |
| 1208 | dbg("%s", "Shutdown interrupt_in_urb\n"); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1209 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | if (mos7840_port->write_urb) { |
| 1214 | /* if this urb had a transfer buffer already (old tx) free it */ |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1215 | if (mos7840_port->write_urb->transfer_buffer != NULL) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1216 | kfree(mos7840_port->write_urb->transfer_buffer); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1217 | usb_free_urb(mos7840_port->write_urb); |
| 1218 | } |
| 1219 | |
| 1220 | Data = 0x0; |
| 1221 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| 1222 | |
| 1223 | Data = 0x00; |
| 1224 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| 1225 | |
| 1226 | mos7840_port->open = 0; |
| 1227 | |
| 1228 | dbg("%s \n", "Leaving ............"); |
| 1229 | } |
| 1230 | |
| 1231 | /************************************************************************ |
| 1232 | * |
| 1233 | * mos7840_block_until_chase_response |
| 1234 | * |
| 1235 | * This function will block the close until one of the following: |
| 1236 | * 1. Response to our Chase comes from mos7840 |
Joe Perches | dc0d5c1 | 2007-12-17 11:40:18 -0800 | [diff] [blame] | 1237 | * 2. A timeout of 10 seconds without activity has expired |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1238 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
| 1239 | * |
| 1240 | ************************************************************************/ |
| 1241 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1242 | static void mos7840_block_until_chase_response(struct tty_struct *tty, |
| 1243 | struct moschip_port *mos7840_port) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1244 | { |
| 1245 | int timeout = 1 * HZ; |
| 1246 | int wait = 10; |
| 1247 | int count; |
| 1248 | |
| 1249 | while (1) { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1250 | count = mos7840_chars_in_buffer(tty); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1251 | |
| 1252 | /* Check for Buffer status */ |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1253 | if (count <= 0) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1254 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1255 | |
| 1256 | /* Block the thread for a while */ |
| 1257 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, |
| 1258 | timeout); |
| 1259 | /* No activity.. count down section */ |
| 1260 | wait--; |
| 1261 | if (wait == 0) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1262 | dbg("%s - TIMEOUT", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1263 | return; |
| 1264 | } else { |
Joe Perches | dc0d5c1 | 2007-12-17 11:40:18 -0800 | [diff] [blame] | 1265 | /* Reset timeout value back to seconds */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1266 | wait = 10; |
| 1267 | } |
| 1268 | } |
| 1269 | |
| 1270 | } |
| 1271 | |
| 1272 | /***************************************************************************** |
| 1273 | * mos7840_break |
| 1274 | * this function sends a break to the port |
| 1275 | *****************************************************************************/ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1276 | static void mos7840_break(struct tty_struct *tty, int break_state) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1277 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1278 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1279 | unsigned char data; |
| 1280 | struct usb_serial *serial; |
| 1281 | struct moschip_port *mos7840_port; |
| 1282 | |
| 1283 | dbg("%s \n", "Entering ..........."); |
| 1284 | dbg("mos7840_break: Start\n"); |
| 1285 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1286 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1287 | dbg("%s", "Port Paranoia failed \n"); |
| 1288 | return; |
| 1289 | } |
| 1290 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1291 | serial = mos7840_get_usb_serial(port, __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1292 | if (!serial) { |
| 1293 | dbg("%s", "Serial Paranoia failed \n"); |
| 1294 | return; |
| 1295 | } |
| 1296 | |
| 1297 | mos7840_port = mos7840_get_port_private(port); |
| 1298 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1299 | if (mos7840_port == NULL) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1300 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1301 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1302 | if (serial->dev) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1303 | /* flush and block until tx is empty */ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1304 | mos7840_block_until_chase_response(tty, mos7840_port); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1305 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1306 | if (break_state == -1) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1307 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1308 | else |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1309 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1310 | |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 1311 | /* FIXME: no locking on shadowLCR anywhere in driver */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1312 | mos7840_port->shadowLCR = data; |
| 1313 | dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", |
| 1314 | mos7840_port->shadowLCR); |
| 1315 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, |
| 1316 | mos7840_port->shadowLCR); |
| 1317 | |
| 1318 | return; |
| 1319 | } |
| 1320 | |
| 1321 | /***************************************************************************** |
| 1322 | * mos7840_write_room |
| 1323 | * this function is called by the tty driver when it wants to know how many |
| 1324 | * bytes of data we can accept for a specific port. |
| 1325 | * If successful, we return the amount of room that we have for this port |
| 1326 | * Otherwise we return a negative error number. |
| 1327 | *****************************************************************************/ |
| 1328 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1329 | static int mos7840_write_room(struct tty_struct *tty) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1330 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1331 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1332 | int i; |
| 1333 | int room = 0; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1334 | unsigned long flags; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1335 | struct moschip_port *mos7840_port; |
| 1336 | |
| 1337 | dbg("%s \n", " mos7840_write_room:entering ..........."); |
| 1338 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1339 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1340 | dbg("%s", "Invalid port \n"); |
| 1341 | dbg("%s \n", " mos7840_write_room:leaving ..........."); |
| 1342 | return -1; |
| 1343 | } |
| 1344 | |
| 1345 | mos7840_port = mos7840_get_port_private(port); |
| 1346 | if (mos7840_port == NULL) { |
| 1347 | dbg("%s \n", "mos7840_break:leaving ..........."); |
| 1348 | return -1; |
| 1349 | } |
| 1350 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1351 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1352 | for (i = 0; i < NUM_URBS; ++i) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1353 | if (!mos7840_port->busy[i]) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1354 | room += URB_TRANSFER_BUFFER_SIZE; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1355 | } |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1356 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1357 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1358 | room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1359 | dbg("%s - returns %d", __func__, room); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1360 | return room; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1361 | |
| 1362 | } |
| 1363 | |
| 1364 | /***************************************************************************** |
| 1365 | * mos7840_write |
| 1366 | * this function is called by the tty driver when data should be written to |
| 1367 | * the port. |
| 1368 | * If successful, we return the number of bytes written, otherwise we |
| 1369 | * return a negative error number. |
| 1370 | *****************************************************************************/ |
| 1371 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1372 | static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1373 | const unsigned char *data, int count) |
| 1374 | { |
| 1375 | int status; |
| 1376 | int i; |
| 1377 | int bytes_sent = 0; |
| 1378 | int transfer_size; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1379 | unsigned long flags; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1380 | |
| 1381 | struct moschip_port *mos7840_port; |
| 1382 | struct usb_serial *serial; |
| 1383 | struct urb *urb; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1384 | /* __u16 Data; */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1385 | const unsigned char *current_position = data; |
| 1386 | unsigned char *data1; |
| 1387 | dbg("%s \n", "entering ..........."); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1388 | /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| 1389 | mos7840_port->shadowLCR); */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1390 | |
| 1391 | #ifdef NOTMOS7840 |
| 1392 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1393 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| 1394 | mos7840_port->shadowLCR = Data; |
| 1395 | dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); |
| 1396 | dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| 1397 | mos7840_port->shadowLCR); |
| 1398 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1399 | /* Data = 0x03; */ |
| 1400 | /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ |
| 1401 | /* mos7840_port->shadowLCR=Data;//Need to add later */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1402 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1403 | Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1404 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 1405 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1406 | /* Data = 0x0c; */ |
| 1407 | /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1408 | Data = 0x00; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1409 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
| 1410 | dbg("mos7840_write:DLL value is %x\n", Data); |
| 1411 | |
| 1412 | Data = 0x0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1413 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
| 1414 | dbg("mos7840_write:DLM value is %x\n", Data); |
| 1415 | |
| 1416 | Data = Data & ~SERIAL_LCR_DLAB; |
| 1417 | dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| 1418 | mos7840_port->shadowLCR); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1419 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 1420 | #endif |
| 1421 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1422 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1423 | dbg("%s", "Port Paranoia failed \n"); |
| 1424 | return -1; |
| 1425 | } |
| 1426 | |
| 1427 | serial = port->serial; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1428 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1429 | dbg("%s", "Serial Paranoia failed \n"); |
| 1430 | return -1; |
| 1431 | } |
| 1432 | |
| 1433 | mos7840_port = mos7840_get_port_private(port); |
| 1434 | if (mos7840_port == NULL) { |
| 1435 | dbg("%s", "mos7840_port is NULL\n"); |
| 1436 | return -1; |
| 1437 | } |
| 1438 | |
| 1439 | /* try to find a free urb in the list */ |
| 1440 | urb = NULL; |
| 1441 | |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1442 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1443 | for (i = 0; i < NUM_URBS; ++i) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1444 | if (!mos7840_port->busy[i]) { |
| 1445 | mos7840_port->busy[i] = 1; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1446 | urb = mos7840_port->write_urb_pool[i]; |
| 1447 | dbg("\nURB:%d", i); |
| 1448 | break; |
| 1449 | } |
| 1450 | } |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1451 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1452 | |
| 1453 | if (urb == NULL) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1454 | dbg("%s - no more free urbs", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1455 | goto exit; |
| 1456 | } |
| 1457 | |
| 1458 | if (urb->transfer_buffer == NULL) { |
| 1459 | urb->transfer_buffer = |
| 1460 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); |
| 1461 | |
| 1462 | if (urb->transfer_buffer == NULL) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1463 | dev_err(&port->dev, "%s no more kernel memory...\n", |
| 1464 | __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1465 | goto exit; |
| 1466 | } |
| 1467 | } |
| 1468 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
| 1469 | |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 1470 | memcpy(urb->transfer_buffer, current_position, transfer_size); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1471 | |
| 1472 | /* fill urb with data and submit */ |
| 1473 | usb_fill_bulk_urb(urb, |
| 1474 | serial->dev, |
| 1475 | usb_sndbulkpipe(serial->dev, |
| 1476 | port->bulk_out_endpointAddress), |
| 1477 | urb->transfer_buffer, |
| 1478 | transfer_size, |
| 1479 | mos7840_bulk_out_data_callback, mos7840_port); |
| 1480 | |
| 1481 | data1 = urb->transfer_buffer; |
| 1482 | dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); |
| 1483 | |
| 1484 | /* send it down the pipe */ |
| 1485 | status = usb_submit_urb(urb, GFP_ATOMIC); |
| 1486 | |
| 1487 | if (status) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1488 | mos7840_port->busy[i] = 0; |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1489 | dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " |
| 1490 | "with status = %d\n", __func__, status); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1491 | bytes_sent = status; |
| 1492 | goto exit; |
| 1493 | } |
| 1494 | bytes_sent = transfer_size; |
| 1495 | mos7840_port->icount.tx += transfer_size; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 1496 | smp_wmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1497 | dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1498 | exit: |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1499 | return bytes_sent; |
| 1500 | |
| 1501 | } |
| 1502 | |
| 1503 | /***************************************************************************** |
| 1504 | * mos7840_throttle |
| 1505 | * this function is called by the tty driver when it wants to stop the data |
| 1506 | * being read from the port. |
| 1507 | *****************************************************************************/ |
| 1508 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1509 | static void mos7840_throttle(struct tty_struct *tty) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1510 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1511 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1512 | struct moschip_port *mos7840_port; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1513 | int status; |
| 1514 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1515 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1516 | dbg("%s", "Invalid port \n"); |
| 1517 | return; |
| 1518 | } |
| 1519 | |
| 1520 | dbg("- port %d\n", port->number); |
| 1521 | |
| 1522 | mos7840_port = mos7840_get_port_private(port); |
| 1523 | |
| 1524 | if (mos7840_port == NULL) |
| 1525 | return; |
| 1526 | |
| 1527 | if (!mos7840_port->open) { |
| 1528 | dbg("%s\n", "port not opened"); |
| 1529 | return; |
| 1530 | } |
| 1531 | |
| 1532 | dbg("%s", "Entering .......... \n"); |
| 1533 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1534 | /* if we are implementing XON/XOFF, send the stop character */ |
| 1535 | if (I_IXOFF(tty)) { |
| 1536 | unsigned char stop_char = STOP_CHAR(tty); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1537 | status = mos7840_write(tty, port, &stop_char, 1); |
| 1538 | if (status <= 0) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1539 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1540 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1541 | /* if we are implementing RTS/CTS, toggle that line */ |
| 1542 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1543 | mos7840_port->shadowMCR &= ~MCR_RTS; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1544 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1545 | mos7840_port->shadowMCR); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1546 | if (status < 0) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1547 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1548 | } |
| 1549 | |
| 1550 | return; |
| 1551 | } |
| 1552 | |
| 1553 | /***************************************************************************** |
| 1554 | * mos7840_unthrottle |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1555 | * this function is called by the tty driver when it wants to resume |
| 1556 | * the data being read from the port (called after mos7840_throttle is |
| 1557 | * called) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1558 | *****************************************************************************/ |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1559 | static void mos7840_unthrottle(struct tty_struct *tty) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1560 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1561 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1562 | int status; |
| 1563 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); |
| 1564 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1565 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1566 | dbg("%s", "Invalid port \n"); |
| 1567 | return; |
| 1568 | } |
| 1569 | |
| 1570 | if (mos7840_port == NULL) |
| 1571 | return; |
| 1572 | |
| 1573 | if (!mos7840_port->open) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1574 | dbg("%s - port not opened", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1575 | return; |
| 1576 | } |
| 1577 | |
| 1578 | dbg("%s", "Entering .......... \n"); |
| 1579 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1580 | /* if we are implementing XON/XOFF, send the start character */ |
| 1581 | if (I_IXOFF(tty)) { |
| 1582 | unsigned char start_char = START_CHAR(tty); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1583 | status = mos7840_write(tty, port, &start_char, 1); |
| 1584 | if (status <= 0) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1585 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1586 | } |
| 1587 | |
| 1588 | /* if we are implementing RTS/CTS, toggle that line */ |
| 1589 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1590 | mos7840_port->shadowMCR |= MCR_RTS; |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1591 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1592 | mos7840_port->shadowMCR); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1593 | if (status < 0) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1594 | return; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1595 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1596 | } |
| 1597 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1598 | static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1599 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1600 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1601 | struct moschip_port *mos7840_port; |
| 1602 | unsigned int result; |
| 1603 | __u16 msr; |
| 1604 | __u16 mcr; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1605 | int status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1606 | mos7840_port = mos7840_get_port_private(port); |
| 1607 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1608 | dbg("%s - port %d", __func__, port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1609 | |
| 1610 | if (mos7840_port == NULL) |
| 1611 | return -ENODEV; |
| 1612 | |
| 1613 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); |
| 1614 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); |
| 1615 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) |
| 1616 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) |
| 1617 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) |
| 1618 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) |
| 1619 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) |
| 1620 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) |
| 1621 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); |
| 1622 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1623 | dbg("%s - 0x%04X", __func__, result); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1624 | |
| 1625 | return result; |
| 1626 | } |
| 1627 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1628 | static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1629 | unsigned int set, unsigned int clear) |
| 1630 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1631 | struct usb_serial_port *port = tty->driver_data; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1632 | struct moschip_port *mos7840_port; |
| 1633 | unsigned int mcr; |
Roel Kluin | 87521c4 | 2008-04-17 06:16:24 +0200 | [diff] [blame] | 1634 | int status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1635 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1636 | dbg("%s - port %d", __func__, port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1637 | |
| 1638 | mos7840_port = mos7840_get_port_private(port); |
| 1639 | |
| 1640 | if (mos7840_port == NULL) |
| 1641 | return -ENODEV; |
| 1642 | |
Alan Cox | e298449 | 2008-02-20 20:51:45 +0000 | [diff] [blame] | 1643 | /* FIXME: What locks the port registers ? */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1644 | mcr = mos7840_port->shadowMCR; |
| 1645 | if (clear & TIOCM_RTS) |
| 1646 | mcr &= ~MCR_RTS; |
| 1647 | if (clear & TIOCM_DTR) |
| 1648 | mcr &= ~MCR_DTR; |
| 1649 | if (clear & TIOCM_LOOP) |
| 1650 | mcr &= ~MCR_LOOPBACK; |
| 1651 | |
| 1652 | if (set & TIOCM_RTS) |
| 1653 | mcr |= MCR_RTS; |
| 1654 | if (set & TIOCM_DTR) |
| 1655 | mcr |= MCR_DTR; |
| 1656 | if (set & TIOCM_LOOP) |
| 1657 | mcr |= MCR_LOOPBACK; |
| 1658 | |
| 1659 | mos7840_port->shadowMCR = mcr; |
| 1660 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1661 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
| 1662 | if (status < 0) { |
| 1663 | dbg("setting MODEM_CONTROL_REGISTER Failed\n"); |
Roel Kluin | 87521c4 | 2008-04-17 06:16:24 +0200 | [diff] [blame] | 1664 | return status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1665 | } |
| 1666 | |
| 1667 | return 0; |
| 1668 | } |
| 1669 | |
| 1670 | /***************************************************************************** |
| 1671 | * mos7840_calc_baud_rate_divisor |
| 1672 | * this function calculates the proper baud rate divisor for the specified |
| 1673 | * baud rate. |
| 1674 | *****************************************************************************/ |
| 1675 | static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1676 | __u16 *clk_sel_val) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1677 | { |
| 1678 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1679 | dbg("%s - %d", __func__, baudRate); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1680 | |
| 1681 | if (baudRate <= 115200) { |
| 1682 | *divisor = 115200 / baudRate; |
| 1683 | *clk_sel_val = 0x0; |
| 1684 | } |
| 1685 | if ((baudRate > 115200) && (baudRate <= 230400)) { |
| 1686 | *divisor = 230400 / baudRate; |
| 1687 | *clk_sel_val = 0x10; |
| 1688 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { |
| 1689 | *divisor = 403200 / baudRate; |
| 1690 | *clk_sel_val = 0x20; |
| 1691 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { |
| 1692 | *divisor = 460800 / baudRate; |
| 1693 | *clk_sel_val = 0x30; |
| 1694 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { |
| 1695 | *divisor = 806400 / baudRate; |
| 1696 | *clk_sel_val = 0x40; |
| 1697 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { |
| 1698 | *divisor = 921600 / baudRate; |
| 1699 | *clk_sel_val = 0x50; |
| 1700 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { |
| 1701 | *divisor = 1572864 / baudRate; |
| 1702 | *clk_sel_val = 0x60; |
| 1703 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { |
| 1704 | *divisor = 3145728 / baudRate; |
| 1705 | *clk_sel_val = 0x70; |
| 1706 | } |
| 1707 | return 0; |
| 1708 | |
| 1709 | #ifdef NOTMCS7840 |
| 1710 | |
| 1711 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { |
| 1712 | if (mos7840_divisor_table[i].BaudRate == baudrate) { |
| 1713 | *divisor = mos7840_divisor_table[i].Divisor; |
| 1714 | return 0; |
| 1715 | } |
| 1716 | } |
| 1717 | |
| 1718 | /* After trying for all the standard baud rates * |
| 1719 | * Try calculating the divisor for this baud rate */ |
| 1720 | |
| 1721 | if (baudrate > 75 && baudrate < 230400) { |
| 1722 | /* get the divisor */ |
| 1723 | custom = (__u16) (230400L / baudrate); |
| 1724 | |
| 1725 | /* Check for round off */ |
| 1726 | round1 = (__u16) (2304000L / baudrate); |
| 1727 | round = (__u16) (round1 - (custom * 10)); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1728 | if (round > 4) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1729 | custom++; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1730 | *divisor = custom; |
| 1731 | |
| 1732 | dbg(" Baud %d = %d\n", baudrate, custom); |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | dbg("%s\n", " Baud calculation Failed..."); |
| 1737 | return -1; |
| 1738 | #endif |
| 1739 | } |
| 1740 | |
| 1741 | /***************************************************************************** |
| 1742 | * mos7840_send_cmd_write_baud_rate |
| 1743 | * this function sends the proper command to change the baud rate of the |
| 1744 | * specified port. |
| 1745 | *****************************************************************************/ |
| 1746 | |
| 1747 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, |
| 1748 | int baudRate) |
| 1749 | { |
| 1750 | int divisor = 0; |
| 1751 | int status; |
| 1752 | __u16 Data; |
| 1753 | unsigned char number; |
| 1754 | __u16 clk_sel_val; |
| 1755 | struct usb_serial_port *port; |
| 1756 | |
| 1757 | if (mos7840_port == NULL) |
| 1758 | return -1; |
| 1759 | |
| 1760 | port = (struct usb_serial_port *)mos7840_port->port; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1761 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1762 | dbg("%s", "Invalid port \n"); |
| 1763 | return -1; |
| 1764 | } |
| 1765 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1766 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1767 | dbg("%s", "Invalid Serial \n"); |
| 1768 | return -1; |
| 1769 | } |
| 1770 | |
| 1771 | dbg("%s", "Entering .......... \n"); |
| 1772 | |
| 1773 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; |
| 1774 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1775 | dbg("%s - port = %d, baud = %d", __func__, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1776 | mos7840_port->port->number, baudRate); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1777 | /* reset clk_uart_sel in spregOffset */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1778 | if (baudRate > 115200) { |
| 1779 | #ifdef HW_flow_control |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1780 | /* NOTE: need to see the pther register to modify */ |
| 1781 | /* setting h/w flow control bit to 1 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1782 | Data = 0x2b; |
| 1783 | mos7840_port->shadowMCR = Data; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1784 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| 1785 | Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1786 | if (status < 0) { |
| 1787 | dbg("Writing spreg failed in set_serial_baud\n"); |
| 1788 | return -1; |
| 1789 | } |
| 1790 | #endif |
| 1791 | |
| 1792 | } else { |
| 1793 | #ifdef HW_flow_control |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1794 | / *setting h/w flow control bit to 0 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1795 | Data = 0xb; |
| 1796 | mos7840_port->shadowMCR = Data; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1797 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| 1798 | Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1799 | if (status < 0) { |
| 1800 | dbg("Writing spreg failed in set_serial_baud\n"); |
| 1801 | return -1; |
| 1802 | } |
| 1803 | #endif |
| 1804 | |
| 1805 | } |
| 1806 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1807 | if (1) { /* baudRate <= 115200) */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1808 | clk_sel_val = 0x0; |
| 1809 | Data = 0x0; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1810 | status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1811 | &clk_sel_val); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1812 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
| 1813 | &Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1814 | if (status < 0) { |
| 1815 | dbg("reading spreg failed in set_serial_baud\n"); |
| 1816 | return -1; |
| 1817 | } |
| 1818 | Data = (Data & 0x8f) | clk_sel_val; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1819 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
| 1820 | Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1821 | if (status < 0) { |
| 1822 | dbg("Writing spreg failed in set_serial_baud\n"); |
| 1823 | return -1; |
| 1824 | } |
| 1825 | /* Calculate the Divisor */ |
| 1826 | |
| 1827 | if (status) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 1828 | dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1829 | return status; |
| 1830 | } |
| 1831 | /* Enable access to divisor latch */ |
| 1832 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; |
| 1833 | mos7840_port->shadowLCR = Data; |
| 1834 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 1835 | |
| 1836 | /* Write the divisor */ |
| 1837 | Data = (unsigned char)(divisor & 0xff); |
| 1838 | dbg("set_serial_baud Value to write DLL is %x\n", Data); |
| 1839 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
| 1840 | |
| 1841 | Data = (unsigned char)((divisor & 0xff00) >> 8); |
| 1842 | dbg("set_serial_baud Value to write DLM is %x\n", Data); |
| 1843 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
| 1844 | |
| 1845 | /* Disable access to divisor latch */ |
| 1846 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; |
| 1847 | mos7840_port->shadowLCR = Data; |
| 1848 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 1849 | |
| 1850 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1851 | return status; |
| 1852 | } |
| 1853 | |
| 1854 | /***************************************************************************** |
| 1855 | * mos7840_change_port_settings |
| 1856 | * This routine is called to set the UART on the device to match |
| 1857 | * the specified new settings. |
| 1858 | *****************************************************************************/ |
| 1859 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 1860 | static void mos7840_change_port_settings(struct tty_struct *tty, |
| 1861 | struct moschip_port *mos7840_port, struct ktermios *old_termios) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1862 | { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1863 | int baud; |
| 1864 | unsigned cflag; |
| 1865 | unsigned iflag; |
| 1866 | __u8 lData; |
| 1867 | __u8 lParity; |
| 1868 | __u8 lStop; |
| 1869 | int status; |
| 1870 | __u16 Data; |
| 1871 | struct usb_serial_port *port; |
| 1872 | struct usb_serial *serial; |
| 1873 | |
| 1874 | if (mos7840_port == NULL) |
| 1875 | return; |
| 1876 | |
| 1877 | port = (struct usb_serial_port *)mos7840_port->port; |
| 1878 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1879 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1880 | dbg("%s", "Invalid port \n"); |
| 1881 | return; |
| 1882 | } |
| 1883 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1884 | if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1885 | dbg("%s", "Invalid Serial \n"); |
| 1886 | return; |
| 1887 | } |
| 1888 | |
| 1889 | serial = port->serial; |
| 1890 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1891 | dbg("%s - port %d", __func__, mos7840_port->port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1892 | |
| 1893 | if (!mos7840_port->open) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1894 | dbg("%s - port not opened", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1895 | return; |
| 1896 | } |
| 1897 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1898 | dbg("%s", "Entering .......... \n"); |
| 1899 | |
| 1900 | lData = LCR_BITS_8; |
| 1901 | lStop = LCR_STOP_1; |
| 1902 | lParity = LCR_PAR_NONE; |
| 1903 | |
| 1904 | cflag = tty->termios->c_cflag; |
| 1905 | iflag = tty->termios->c_iflag; |
| 1906 | |
| 1907 | /* Change the number of bits */ |
| 1908 | if (cflag & CSIZE) { |
| 1909 | switch (cflag & CSIZE) { |
| 1910 | case CS5: |
| 1911 | lData = LCR_BITS_5; |
| 1912 | break; |
| 1913 | |
| 1914 | case CS6: |
| 1915 | lData = LCR_BITS_6; |
| 1916 | break; |
| 1917 | |
| 1918 | case CS7: |
| 1919 | lData = LCR_BITS_7; |
| 1920 | break; |
| 1921 | default: |
| 1922 | case CS8: |
| 1923 | lData = LCR_BITS_8; |
| 1924 | break; |
| 1925 | } |
| 1926 | } |
| 1927 | /* Change the Parity bit */ |
| 1928 | if (cflag & PARENB) { |
| 1929 | if (cflag & PARODD) { |
| 1930 | lParity = LCR_PAR_ODD; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1931 | dbg("%s - parity = odd", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1932 | } else { |
| 1933 | lParity = LCR_PAR_EVEN; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1934 | dbg("%s - parity = even", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1935 | } |
| 1936 | |
| 1937 | } else { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1938 | dbg("%s - parity = none", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1939 | } |
| 1940 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1941 | if (cflag & CMSPAR) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1942 | lParity = lParity | 0x20; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1943 | |
| 1944 | /* Change the Stop bit */ |
| 1945 | if (cflag & CSTOPB) { |
| 1946 | lStop = LCR_STOP_2; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1947 | dbg("%s - stop bits = 2", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1948 | } else { |
| 1949 | lStop = LCR_STOP_1; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1950 | dbg("%s - stop bits = 1", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1951 | } |
| 1952 | |
| 1953 | /* Update the LCR with the correct value */ |
| 1954 | mos7840_port->shadowLCR &= |
| 1955 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
| 1956 | mos7840_port->shadowLCR |= (lData | lParity | lStop); |
| 1957 | |
| 1958 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", |
| 1959 | mos7840_port->shadowLCR); |
| 1960 | /* Disable Interrupts */ |
| 1961 | Data = 0x00; |
| 1962 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| 1963 | |
| 1964 | Data = 0x00; |
| 1965 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| 1966 | |
| 1967 | Data = 0xcf; |
| 1968 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| 1969 | |
| 1970 | /* Send the updated LCR value to the mos7840 */ |
| 1971 | Data = mos7840_port->shadowLCR; |
| 1972 | |
| 1973 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| 1974 | |
| 1975 | Data = 0x00b; |
| 1976 | mos7840_port->shadowMCR = Data; |
| 1977 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| 1978 | Data = 0x00b; |
| 1979 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| 1980 | |
| 1981 | /* set up the MCR register and send it to the mos7840 */ |
| 1982 | |
| 1983 | mos7840_port->shadowMCR = MCR_MASTER_IE; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1984 | if (cflag & CBAUD) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1985 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1986 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1987 | if (cflag & CRTSCTS) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1988 | mos7840_port->shadowMCR |= (MCR_XON_ANY); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 1989 | else |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1990 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 1991 | |
| 1992 | Data = mos7840_port->shadowMCR; |
| 1993 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| 1994 | |
| 1995 | /* Determine divisor based on baud rate */ |
| 1996 | baud = tty_get_baud_rate(tty); |
| 1997 | |
| 1998 | if (!baud) { |
| 1999 | /* pick a default, any default... */ |
| 2000 | dbg("%s\n", "Picked default baud..."); |
| 2001 | baud = 9600; |
| 2002 | } |
| 2003 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2004 | dbg("%s - baud rate = %d", __func__, baud); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2005 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
| 2006 | |
| 2007 | /* Enable Interrupts */ |
| 2008 | Data = 0x0c; |
| 2009 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| 2010 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2011 | if (mos7840_port->read_urb_busy == false) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2012 | mos7840_port->read_urb->dev = serial->dev; |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2013 | mos7840_port->read_urb_busy = true; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2014 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2015 | if (status) { |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2016 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2017 | status); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2018 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2019 | } |
| 2020 | } |
| 2021 | wake_up(&mos7840_port->delta_msr_wait); |
| 2022 | mos7840_port->delta_msr_cond = 1; |
| 2023 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", |
| 2024 | mos7840_port->shadowLCR); |
| 2025 | |
| 2026 | return; |
| 2027 | } |
| 2028 | |
| 2029 | /***************************************************************************** |
| 2030 | * mos7840_set_termios |
| 2031 | * this function is called by the tty driver when it wants to change |
| 2032 | * the termios structure |
| 2033 | *****************************************************************************/ |
| 2034 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2035 | static void mos7840_set_termios(struct tty_struct *tty, |
| 2036 | struct usb_serial_port *port, |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2037 | struct ktermios *old_termios) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2038 | { |
| 2039 | int status; |
| 2040 | unsigned int cflag; |
| 2041 | struct usb_serial *serial; |
| 2042 | struct moschip_port *mos7840_port; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2043 | dbg("mos7840_set_termios: START\n"); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2044 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2045 | dbg("%s", "Invalid port \n"); |
| 2046 | return; |
| 2047 | } |
| 2048 | |
| 2049 | serial = port->serial; |
| 2050 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2051 | if (mos7840_serial_paranoia_check(serial, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2052 | dbg("%s", "Invalid Serial \n"); |
| 2053 | return; |
| 2054 | } |
| 2055 | |
| 2056 | mos7840_port = mos7840_get_port_private(port); |
| 2057 | |
| 2058 | if (mos7840_port == NULL) |
| 2059 | return; |
| 2060 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2061 | if (!mos7840_port->open) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2062 | dbg("%s - port not opened", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2063 | return; |
| 2064 | } |
| 2065 | |
| 2066 | dbg("%s\n", "setting termios - "); |
| 2067 | |
| 2068 | cflag = tty->termios->c_cflag; |
| 2069 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2070 | dbg("%s - clfag %08x iflag %08x", __func__, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2071 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2072 | dbg("%s - old clfag %08x old iflag %08x", __func__, |
Alan Cox | 3d3ddce | 2007-10-15 20:53:35 +0100 | [diff] [blame] | 2073 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2074 | dbg("%s - port %d", __func__, port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2075 | |
| 2076 | /* change the port settings to the new ones specified */ |
| 2077 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2078 | mos7840_change_port_settings(tty, mos7840_port, old_termios); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2079 | |
| 2080 | if (!mos7840_port->read_urb) { |
| 2081 | dbg("%s", "URB KILLED !!!!!\n"); |
| 2082 | return; |
| 2083 | } |
| 2084 | |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2085 | if (mos7840_port->read_urb_busy == false) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2086 | mos7840_port->read_urb->dev = serial->dev; |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2087 | mos7840_port->read_urb_busy = true; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2088 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
| 2089 | if (status) { |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2090 | dbg("usb_submit_urb(read bulk) failed, status = %d", |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2091 | status); |
Greg Kroah-Hartman | 50de36f | 2008-12-10 16:00:30 -0800 | [diff] [blame] | 2092 | mos7840_port->read_urb_busy = false; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2093 | } |
| 2094 | } |
| 2095 | return; |
| 2096 | } |
| 2097 | |
| 2098 | /***************************************************************************** |
| 2099 | * mos7840_get_lsr_info - get line status register info |
| 2100 | * |
| 2101 | * Purpose: Let user call ioctl() to get info when the UART physically |
| 2102 | * is emptied. On bus types like RS485, the transmitter must |
| 2103 | * release the bus after transmitting. This must be done when |
| 2104 | * the transmit shift register is empty, not be done when the |
| 2105 | * transmit holding register is empty. This functionality |
| 2106 | * allows an RS485 driver to be written in user space. |
| 2107 | *****************************************************************************/ |
| 2108 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2109 | static int mos7840_get_lsr_info(struct tty_struct *tty, |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2110 | unsigned int __user *value) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2111 | { |
| 2112 | int count; |
| 2113 | unsigned int result = 0; |
| 2114 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2115 | count = mos7840_chars_in_buffer(tty); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2116 | if (count == 0) { |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2117 | dbg("%s -- Empty", __func__); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2118 | result = TIOCSER_TEMT; |
| 2119 | } |
| 2120 | |
| 2121 | if (copy_to_user(value, &result, sizeof(int))) |
| 2122 | return -EFAULT; |
| 2123 | return 0; |
| 2124 | } |
| 2125 | |
| 2126 | /***************************************************************************** |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2127 | * mos7840_set_modem_info |
| 2128 | * function to set modem info |
| 2129 | *****************************************************************************/ |
| 2130 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2131 | /* FIXME: Should be using the model control hooks */ |
| 2132 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2133 | static int mos7840_set_modem_info(struct moschip_port *mos7840_port, |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2134 | unsigned int cmd, unsigned int __user *value) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2135 | { |
| 2136 | unsigned int mcr; |
| 2137 | unsigned int arg; |
| 2138 | __u16 Data; |
| 2139 | int status; |
| 2140 | struct usb_serial_port *port; |
| 2141 | |
| 2142 | if (mos7840_port == NULL) |
| 2143 | return -1; |
| 2144 | |
| 2145 | port = (struct usb_serial_port *)mos7840_port->port; |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2146 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2147 | dbg("%s", "Invalid port \n"); |
| 2148 | return -1; |
| 2149 | } |
| 2150 | |
| 2151 | mcr = mos7840_port->shadowMCR; |
| 2152 | |
| 2153 | if (copy_from_user(&arg, value, sizeof(int))) |
| 2154 | return -EFAULT; |
| 2155 | |
| 2156 | switch (cmd) { |
| 2157 | case TIOCMBIS: |
| 2158 | if (arg & TIOCM_RTS) |
| 2159 | mcr |= MCR_RTS; |
| 2160 | if (arg & TIOCM_DTR) |
| 2161 | mcr |= MCR_RTS; |
| 2162 | if (arg & TIOCM_LOOP) |
| 2163 | mcr |= MCR_LOOPBACK; |
| 2164 | break; |
| 2165 | |
| 2166 | case TIOCMBIC: |
| 2167 | if (arg & TIOCM_RTS) |
| 2168 | mcr &= ~MCR_RTS; |
| 2169 | if (arg & TIOCM_DTR) |
| 2170 | mcr &= ~MCR_RTS; |
| 2171 | if (arg & TIOCM_LOOP) |
| 2172 | mcr &= ~MCR_LOOPBACK; |
| 2173 | break; |
| 2174 | |
| 2175 | case TIOCMSET: |
| 2176 | /* turn off the RTS and DTR and LOOPBACK |
| 2177 | * and then only turn on what was asked to */ |
| 2178 | mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); |
| 2179 | mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); |
| 2180 | mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); |
| 2181 | mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); |
| 2182 | break; |
| 2183 | } |
| 2184 | |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 2185 | lock_kernel(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2186 | mos7840_port->shadowMCR = mcr; |
| 2187 | |
| 2188 | Data = mos7840_port->shadowMCR; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2189 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
Alan Cox | 6b447f04 | 2009-01-02 13:48:56 +0000 | [diff] [blame] | 2190 | unlock_kernel(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2191 | if (status < 0) { |
| 2192 | dbg("setting MODEM_CONTROL_REGISTER Failed\n"); |
| 2193 | return -1; |
| 2194 | } |
| 2195 | |
| 2196 | return 0; |
| 2197 | } |
| 2198 | |
| 2199 | /***************************************************************************** |
| 2200 | * mos7840_get_modem_info |
| 2201 | * function to get modem info |
| 2202 | *****************************************************************************/ |
| 2203 | |
| 2204 | static int mos7840_get_modem_info(struct moschip_port *mos7840_port, |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2205 | unsigned int __user *value) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2206 | { |
| 2207 | unsigned int result = 0; |
| 2208 | __u16 msr; |
| 2209 | unsigned int mcr = mos7840_port->shadowMCR; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2210 | mos7840_get_uart_reg(mos7840_port->port, |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2211 | MODEM_STATUS_REGISTER, &msr); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2212 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ |
| 2213 | |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ |
| 2214 | |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ |
| 2215 | |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ |
| 2216 | |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ |
| 2217 | |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ |
| 2218 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2219 | dbg("%s -- %x", __func__, result); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2220 | |
| 2221 | if (copy_to_user(value, &result, sizeof(int))) |
| 2222 | return -EFAULT; |
| 2223 | return 0; |
| 2224 | } |
| 2225 | |
| 2226 | /***************************************************************************** |
| 2227 | * mos7840_get_serial_info |
| 2228 | * function to get information about serial port |
| 2229 | *****************************************************************************/ |
| 2230 | |
| 2231 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2232 | struct serial_struct __user *retinfo) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2233 | { |
| 2234 | struct serial_struct tmp; |
| 2235 | |
| 2236 | if (mos7840_port == NULL) |
| 2237 | return -1; |
| 2238 | |
| 2239 | if (!retinfo) |
| 2240 | return -EFAULT; |
| 2241 | |
| 2242 | memset(&tmp, 0, sizeof(tmp)); |
| 2243 | |
| 2244 | tmp.type = PORT_16550A; |
| 2245 | tmp.line = mos7840_port->port->serial->minor; |
| 2246 | tmp.port = mos7840_port->port->number; |
| 2247 | tmp.irq = 0; |
| 2248 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| 2249 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
| 2250 | tmp.baud_base = 9600; |
| 2251 | tmp.close_delay = 5 * HZ; |
| 2252 | tmp.closing_wait = 30 * HZ; |
| 2253 | |
| 2254 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| 2255 | return -EFAULT; |
| 2256 | return 0; |
| 2257 | } |
| 2258 | |
| 2259 | /***************************************************************************** |
| 2260 | * SerialIoctl |
| 2261 | * this function handles any ioctl calls to the driver |
| 2262 | *****************************************************************************/ |
| 2263 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2264 | static int mos7840_ioctl(struct tty_struct *tty, struct file *file, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2265 | unsigned int cmd, unsigned long arg) |
| 2266 | { |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2267 | struct usb_serial_port *port = tty->driver_data; |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2268 | void __user *argp = (void __user *)arg; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2269 | struct moschip_port *mos7840_port; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2270 | |
| 2271 | struct async_icount cnow; |
| 2272 | struct async_icount cprev; |
| 2273 | struct serial_icounter_struct icount; |
| 2274 | int mosret = 0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2275 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2276 | if (mos7840_port_paranoia_check(port, __func__)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2277 | dbg("%s", "Invalid port \n"); |
| 2278 | return -1; |
| 2279 | } |
| 2280 | |
| 2281 | mos7840_port = mos7840_get_port_private(port); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2282 | |
| 2283 | if (mos7840_port == NULL) |
| 2284 | return -1; |
| 2285 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2286 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2287 | |
| 2288 | switch (cmd) { |
| 2289 | /* return number of bytes available */ |
| 2290 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2291 | case TIOCSERGETLSR: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2292 | dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2293 | return mos7840_get_lsr_info(tty, argp); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2294 | return 0; |
| 2295 | |
Alan Cox | 95da310 | 2008-07-22 11:09:07 +0100 | [diff] [blame] | 2296 | /* FIXME: use the modem hooks and remove this */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2297 | case TIOCMBIS: |
| 2298 | case TIOCMBIC: |
| 2299 | case TIOCMSET: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2300 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2301 | port->number); |
| 2302 | mosret = |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2303 | mos7840_set_modem_info(mos7840_port, cmd, argp); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2304 | return mosret; |
| 2305 | |
| 2306 | case TIOCMGET: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2307 | dbg("%s (%d) TIOCMGET", __func__, port->number); |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2308 | return mos7840_get_modem_info(mos7840_port, argp); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2309 | |
| 2310 | case TIOCGSERIAL: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2311 | dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2312 | return mos7840_get_serial_info(mos7840_port, argp); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2313 | |
| 2314 | case TIOCSSERIAL: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2315 | dbg("%s (%d) TIOCSSERIAL", __func__, port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2316 | break; |
| 2317 | |
| 2318 | case TIOCMIWAIT: |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2319 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2320 | cprev = mos7840_port->icount; |
| 2321 | while (1) { |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2322 | /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2323 | mos7840_port->delta_msr_cond = 0; |
| 2324 | wait_event_interruptible(mos7840_port->delta_msr_wait, |
| 2325 | (mos7840_port-> |
| 2326 | delta_msr_cond == 1)); |
| 2327 | |
| 2328 | /* see if a signal did it */ |
| 2329 | if (signal_pending(current)) |
| 2330 | return -ERESTARTSYS; |
| 2331 | cnow = mos7840_port->icount; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2332 | smp_rmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2333 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 2334 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) |
| 2335 | return -EIO; /* no change => error */ |
| 2336 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| 2337 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| 2338 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| 2339 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { |
| 2340 | return 0; |
| 2341 | } |
| 2342 | cprev = cnow; |
| 2343 | } |
| 2344 | /* NOTREACHED */ |
| 2345 | break; |
| 2346 | |
| 2347 | case TIOCGICOUNT: |
| 2348 | cnow = mos7840_port->icount; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2349 | smp_rmb(); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2350 | icount.cts = cnow.cts; |
| 2351 | icount.dsr = cnow.dsr; |
| 2352 | icount.rng = cnow.rng; |
| 2353 | icount.dcd = cnow.dcd; |
| 2354 | icount.rx = cnow.rx; |
| 2355 | icount.tx = cnow.tx; |
| 2356 | icount.frame = cnow.frame; |
| 2357 | icount.overrun = cnow.overrun; |
| 2358 | icount.parity = cnow.parity; |
| 2359 | icount.brk = cnow.brk; |
| 2360 | icount.buf_overrun = cnow.buf_overrun; |
| 2361 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 2362 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2363 | port->number, icount.rx, icount.tx); |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2364 | if (copy_to_user(argp, &icount, sizeof(icount))) |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2365 | return -EFAULT; |
| 2366 | return 0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2367 | default: |
| 2368 | break; |
| 2369 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2370 | return -ENOIOCTLCMD; |
| 2371 | } |
| 2372 | |
| 2373 | static int mos7840_calc_num_ports(struct usb_serial *serial) |
| 2374 | { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2375 | int mos7840_num_ports = 0; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2376 | |
| 2377 | dbg("numberofendpoints: %d \n", |
| 2378 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints); |
| 2379 | dbg("numberofendpoints: %d \n", |
| 2380 | (int)serial->interface->altsetting->desc.bNumEndpoints); |
| 2381 | if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2382 | mos7840_num_ports = serial->num_ports = 2; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2383 | } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2384 | serial->num_bulk_in = 4; |
| 2385 | serial->num_bulk_out = 4; |
| 2386 | mos7840_num_ports = serial->num_ports = 4; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2387 | } |
| 2388 | |
| 2389 | return mos7840_num_ports; |
| 2390 | } |
| 2391 | |
| 2392 | /**************************************************************************** |
| 2393 | * mos7840_startup |
| 2394 | ****************************************************************************/ |
| 2395 | |
| 2396 | static int mos7840_startup(struct usb_serial *serial) |
| 2397 | { |
| 2398 | struct moschip_port *mos7840_port; |
| 2399 | struct usb_device *dev; |
| 2400 | int i, status; |
| 2401 | |
| 2402 | __u16 Data; |
| 2403 | dbg("%s \n", " mos7840_startup :entering.........."); |
| 2404 | |
| 2405 | if (!serial) { |
| 2406 | dbg("%s\n", "Invalid Handler"); |
| 2407 | return -1; |
| 2408 | } |
| 2409 | |
| 2410 | dev = serial->dev; |
| 2411 | |
| 2412 | dbg("%s\n", "Entering..."); |
| 2413 | |
| 2414 | /* we set up the pointers to the endpoints in the mos7840_open * |
| 2415 | * function, as the structures aren't created yet. */ |
| 2416 | |
| 2417 | /* set up port private structures */ |
| 2418 | for (i = 0; i < serial->num_ports; ++i) { |
Burman Yan | 7ac9da1 | 2006-11-22 20:54:38 +0200 | [diff] [blame] | 2419 | mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2420 | if (mos7840_port == NULL) { |
Greg Kroah-Hartman | 194343d | 2008-08-20 16:56:34 -0700 | [diff] [blame] | 2421 | dev_err(&dev->dev, "%s - Out of memory\n", __func__); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2422 | status = -ENOMEM; |
| 2423 | i--; /* don't follow NULL pointer cleaning up */ |
| 2424 | goto error; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2425 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2426 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2427 | /* Initialize all port interrupt end point to port 0 int |
| 2428 | * endpoint. Our device has only one interrupt end point |
| 2429 | * common to all port */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2430 | |
| 2431 | mos7840_port->port = serial->port[i]; |
| 2432 | mos7840_set_port_private(serial->port[i], mos7840_port); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2433 | spin_lock_init(&mos7840_port->pool_lock); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2434 | |
Tony Cook | 37768ad | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 2435 | /* minor is not initialised until later by |
| 2436 | * usb-serial.c:get_free_serial() and cannot therefore be used |
| 2437 | * to index device instances */ |
| 2438 | mos7840_port->port_num = i + 1; |
| 2439 | dbg ("serial->port[i]->number = %d", serial->port[i]->number); |
| 2440 | dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); |
| 2441 | dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); |
| 2442 | dbg ("serial->minor = %d", serial->minor); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2443 | |
| 2444 | if (mos7840_port->port_num == 1) { |
| 2445 | mos7840_port->SpRegOffset = 0x0; |
| 2446 | mos7840_port->ControlRegOffset = 0x1; |
| 2447 | mos7840_port->DcrRegOffset = 0x4; |
| 2448 | } else if ((mos7840_port->port_num == 2) |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2449 | && (serial->num_ports == 4)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2450 | mos7840_port->SpRegOffset = 0x8; |
| 2451 | mos7840_port->ControlRegOffset = 0x9; |
| 2452 | mos7840_port->DcrRegOffset = 0x16; |
| 2453 | } else if ((mos7840_port->port_num == 2) |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2454 | && (serial->num_ports == 2)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2455 | mos7840_port->SpRegOffset = 0xa; |
| 2456 | mos7840_port->ControlRegOffset = 0xb; |
| 2457 | mos7840_port->DcrRegOffset = 0x19; |
| 2458 | } else if ((mos7840_port->port_num == 3) |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2459 | && (serial->num_ports == 4)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2460 | mos7840_port->SpRegOffset = 0xa; |
| 2461 | mos7840_port->ControlRegOffset = 0xb; |
| 2462 | mos7840_port->DcrRegOffset = 0x19; |
| 2463 | } else if ((mos7840_port->port_num == 4) |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2464 | && (serial->num_ports == 4)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2465 | mos7840_port->SpRegOffset = 0xc; |
| 2466 | mos7840_port->ControlRegOffset = 0xd; |
| 2467 | mos7840_port->DcrRegOffset = 0x1c; |
| 2468 | } |
| 2469 | mos7840_dump_serial_port(mos7840_port); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2470 | mos7840_set_port_private(serial->port[i], mos7840_port); |
| 2471 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2472 | /* enable rx_disable bit in control register */ |
| 2473 | status = mos7840_get_reg_sync(serial->port[i], |
| 2474 | mos7840_port->ControlRegOffset, &Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2475 | if (status < 0) { |
| 2476 | dbg("Reading ControlReg failed status-0x%x\n", status); |
| 2477 | break; |
| 2478 | } else |
| 2479 | dbg("ControlReg Reading success val is %x, status%d\n", |
| 2480 | Data, status); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2481 | Data |= 0x08; /* setting driver done bit */ |
| 2482 | Data |= 0x04; /* sp1_bit to have cts change reflect in |
| 2483 | modem status reg */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2484 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2485 | /* Data |= 0x20; //rx_disable bit */ |
| 2486 | status = mos7840_set_reg_sync(serial->port[i], |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2487 | mos7840_port->ControlRegOffset, Data); |
| 2488 | if (status < 0) { |
| 2489 | dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); |
| 2490 | break; |
| 2491 | } else |
| 2492 | dbg("ControlReg Writing success(rx_disable) status%d\n", |
| 2493 | status); |
| 2494 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2495 | /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
| 2496 | and 0x24 in DCR3 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2497 | Data = 0x01; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2498 | status = mos7840_set_reg_sync(serial->port[i], |
| 2499 | (__u16) (mos7840_port->DcrRegOffset + 0), Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2500 | if (status < 0) { |
| 2501 | dbg("Writing DCR0 failed status-0x%x\n", status); |
| 2502 | break; |
| 2503 | } else |
| 2504 | dbg("DCR0 Writing success status%d\n", status); |
| 2505 | |
| 2506 | Data = 0x05; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2507 | status = mos7840_set_reg_sync(serial->port[i], |
| 2508 | (__u16) (mos7840_port->DcrRegOffset + 1), Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2509 | if (status < 0) { |
| 2510 | dbg("Writing DCR1 failed status-0x%x\n", status); |
| 2511 | break; |
| 2512 | } else |
| 2513 | dbg("DCR1 Writing success status%d\n", status); |
| 2514 | |
| 2515 | Data = 0x24; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2516 | status = mos7840_set_reg_sync(serial->port[i], |
| 2517 | (__u16) (mos7840_port->DcrRegOffset + 2), Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2518 | if (status < 0) { |
| 2519 | dbg("Writing DCR2 failed status-0x%x\n", status); |
| 2520 | break; |
| 2521 | } else |
| 2522 | dbg("DCR2 Writing success status%d\n", status); |
| 2523 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2524 | /* write values in clkstart0x0 and clkmulti 0x20 */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2525 | Data = 0x0; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2526 | status = mos7840_set_reg_sync(serial->port[i], |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2527 | CLK_START_VALUE_REGISTER, Data); |
| 2528 | if (status < 0) { |
| 2529 | dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); |
| 2530 | break; |
| 2531 | } else |
| 2532 | dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); |
| 2533 | |
| 2534 | Data = 0x20; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2535 | status = mos7840_set_reg_sync(serial->port[i], |
| 2536 | CLK_MULTI_REGISTER, Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2537 | if (status < 0) { |
| 2538 | dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", |
| 2539 | status); |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2540 | goto error; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2541 | } else |
| 2542 | dbg("CLK_MULTI_REGISTER Writing success status%d\n", |
| 2543 | status); |
| 2544 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2545 | /* write value 0x0 to scratchpad register */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2546 | Data = 0x00; |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2547 | status = mos7840_set_uart_reg(serial->port[i], |
| 2548 | SCRATCH_PAD_REGISTER, Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2549 | if (status < 0) { |
| 2550 | dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", |
| 2551 | status); |
| 2552 | break; |
| 2553 | } else |
| 2554 | dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", |
| 2555 | status); |
| 2556 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2557 | /* Zero Length flag register */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2558 | if ((mos7840_port->port_num != 1) |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2559 | && (serial->num_ports == 2)) { |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2560 | |
| 2561 | Data = 0xff; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2562 | status = mos7840_set_reg_sync(serial->port[i], |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2563 | (__u16) (ZLP_REG1 + |
| 2564 | ((__u16)mos7840_port->port_num)), Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2565 | dbg("ZLIP offset%x\n", |
| 2566 | (__u16) (ZLP_REG1 + |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2567 | ((__u16) mos7840_port->port_num))); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2568 | if (status < 0) { |
| 2569 | dbg("Writing ZLP_REG%d failed status-0x%x\n", |
| 2570 | i + 2, status); |
| 2571 | break; |
| 2572 | } else |
| 2573 | dbg("ZLP_REG%d Writing success status%d\n", |
| 2574 | i + 2, status); |
| 2575 | } else { |
| 2576 | Data = 0xff; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2577 | status = mos7840_set_reg_sync(serial->port[i], |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2578 | (__u16) (ZLP_REG1 + |
| 2579 | ((__u16)mos7840_port->port_num) - 0x1), Data); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2580 | dbg("ZLIP offset%x\n", |
| 2581 | (__u16) (ZLP_REG1 + |
| 2582 | ((__u16) mos7840_port->port_num) - 0x1)); |
| 2583 | if (status < 0) { |
| 2584 | dbg("Writing ZLP_REG%d failed status-0x%x\n", |
| 2585 | i + 1, status); |
| 2586 | break; |
| 2587 | } else |
| 2588 | dbg("ZLP_REG%d Writing success status%d\n", |
| 2589 | i + 1, status); |
| 2590 | |
| 2591 | } |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2592 | mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2593 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2594 | mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), |
| 2595 | GFP_KERNEL); |
| 2596 | if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || |
| 2597 | !mos7840_port->dr) { |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2598 | status = -ENOMEM; |
| 2599 | goto error; |
| 2600 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2601 | } |
| 2602 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2603 | /* Zero Length flag enable */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2604 | Data = 0x0f; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2605 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); |
| 2606 | if (status < 0) { |
| 2607 | dbg("Writing ZLP_REG5 failed status-0x%x\n", status); |
Roel Kluin | 7ced46c | 2007-10-27 03:36:37 +0200 | [diff] [blame] | 2608 | goto error; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2609 | } else |
| 2610 | dbg("ZLP_REG5 Writing success status%d\n", status); |
| 2611 | |
| 2612 | /* setting configuration feature to one */ |
| 2613 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
Al Viro | 97c4965 | 2006-10-09 20:29:03 +0100 | [diff] [blame] | 2614 | (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2615 | return 0; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2616 | error: |
| 2617 | for (/* nothing */; i >= 0; i--) { |
| 2618 | mos7840_port = mos7840_get_port_private(serial->port[i]); |
| 2619 | |
| 2620 | kfree(mos7840_port->dr); |
| 2621 | kfree(mos7840_port->ctrl_buf); |
| 2622 | usb_free_urb(mos7840_port->control_urb); |
| 2623 | kfree(mos7840_port); |
| 2624 | serial->port[i] = NULL; |
| 2625 | } |
| 2626 | return status; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2627 | } |
| 2628 | |
| 2629 | /**************************************************************************** |
| 2630 | * mos7840_shutdown |
| 2631 | * This function is called whenever the device is removed from the usb bus. |
| 2632 | ****************************************************************************/ |
| 2633 | |
| 2634 | static void mos7840_shutdown(struct usb_serial *serial) |
| 2635 | { |
| 2636 | int i; |
Oliver Neukum | 0de9a70 | 2007-03-16 20:28:28 +0100 | [diff] [blame] | 2637 | unsigned long flags; |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2638 | struct moschip_port *mos7840_port; |
| 2639 | dbg("%s \n", " shutdown :entering.........."); |
| 2640 | |
| 2641 | if (!serial) { |
| 2642 | dbg("%s", "Invalid Handler \n"); |
| 2643 | return; |
| 2644 | } |
| 2645 | |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2646 | /* check for the ports to be closed,close the ports and disconnect */ |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2647 | |
| 2648 | /* free private structure allocated for serial port * |
| 2649 | * stop reads and writes on all ports */ |
| 2650 | |
| 2651 | for (i = 0; i < serial->num_ports; ++i) { |
| 2652 | mos7840_port = mos7840_get_port_private(serial->port[i]); |
Tony Cook | 37768ad | 2009-04-18 22:42:18 +0930 | [diff] [blame] | 2653 | dbg ("mos7840_port %d = %p", i, mos7840_port); |
| 2654 | if (mos7840_port) { |
| 2655 | spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| 2656 | mos7840_port->zombie = 1; |
| 2657 | spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| 2658 | usb_kill_urb(mos7840_port->control_urb); |
| 2659 | kfree(mos7840_port->ctrl_buf); |
| 2660 | kfree(mos7840_port->dr); |
| 2661 | kfree(mos7840_port); |
| 2662 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2663 | mos7840_set_port_private(serial->port[i], NULL); |
| 2664 | } |
| 2665 | |
| 2666 | dbg("%s\n", "Thank u :: "); |
| 2667 | |
| 2668 | } |
| 2669 | |
Johannes Hölzl | d9b1b78 | 2006-12-17 21:50:24 +0100 | [diff] [blame] | 2670 | static struct usb_driver io_driver = { |
| 2671 | .name = "mos7840", |
| 2672 | .probe = usb_serial_probe, |
| 2673 | .disconnect = usb_serial_disconnect, |
| 2674 | .id_table = moschip_id_table_combined, |
| 2675 | .no_dynamic_id = 1, |
| 2676 | }; |
| 2677 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2678 | static struct usb_serial_driver moschip7840_4port_device = { |
| 2679 | .driver = { |
| 2680 | .owner = THIS_MODULE, |
| 2681 | .name = "mos7840", |
| 2682 | }, |
| 2683 | .description = DRIVER_DESC, |
Johannes Hölzl | d9b1b78 | 2006-12-17 21:50:24 +0100 | [diff] [blame] | 2684 | .usb_driver = &io_driver, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2685 | .id_table = moschip_port_id_table, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2686 | .num_ports = 4, |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2687 | .open = mos7840_open, |
| 2688 | .close = mos7840_close, |
| 2689 | .write = mos7840_write, |
| 2690 | .write_room = mos7840_write_room, |
| 2691 | .chars_in_buffer = mos7840_chars_in_buffer, |
| 2692 | .throttle = mos7840_throttle, |
| 2693 | .unthrottle = mos7840_unthrottle, |
| 2694 | .calc_num_ports = mos7840_calc_num_ports, |
| 2695 | #ifdef MCSSerialProbe |
| 2696 | .probe = mos7840_serial_probe, |
| 2697 | #endif |
| 2698 | .ioctl = mos7840_ioctl, |
| 2699 | .set_termios = mos7840_set_termios, |
| 2700 | .break_ctl = mos7840_break, |
| 2701 | .tiocmget = mos7840_tiocmget, |
| 2702 | .tiocmset = mos7840_tiocmset, |
| 2703 | .attach = mos7840_startup, |
| 2704 | .shutdown = mos7840_shutdown, |
| 2705 | .read_bulk_callback = mos7840_bulk_in_callback, |
| 2706 | .read_int_callback = mos7840_interrupt_callback, |
| 2707 | }; |
| 2708 | |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2709 | /**************************************************************************** |
| 2710 | * moschip7840_init |
| 2711 | * This is called by the module subsystem, or on startup to initialize us |
| 2712 | ****************************************************************************/ |
| 2713 | static int __init moschip7840_init(void) |
| 2714 | { |
| 2715 | int retval; |
| 2716 | |
| 2717 | dbg("%s \n", " mos7840_init :entering.........."); |
| 2718 | |
| 2719 | /* Register with the usb serial */ |
| 2720 | retval = usb_serial_register(&moschip7840_4port_device); |
| 2721 | |
| 2722 | if (retval) |
| 2723 | goto failed_port_device_register; |
| 2724 | |
| 2725 | dbg("%s\n", "Entring..."); |
Greg Kroah-Hartman | c197a8d | 2008-08-18 13:21:04 -0700 | [diff] [blame] | 2726 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| 2727 | DRIVER_DESC "\n"); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2728 | |
| 2729 | /* Register with the usb */ |
| 2730 | retval = usb_register(&io_driver); |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2731 | if (retval == 0) { |
| 2732 | dbg("%s\n", "Leaving..."); |
| 2733 | return 0; |
| 2734 | } |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2735 | usb_serial_deregister(&moschip7840_4port_device); |
Alan Cox | 880af9d | 2008-07-22 11:16:12 +0100 | [diff] [blame] | 2736 | failed_port_device_register: |
Paul B Schroeder | 3f54297 | 2006-08-31 19:41:47 -0500 | [diff] [blame] | 2737 | return retval; |
| 2738 | } |
| 2739 | |
| 2740 | /**************************************************************************** |
| 2741 | * moschip7840_exit |
| 2742 | * Called when the driver is about to be unloaded. |
| 2743 | ****************************************************************************/ |
| 2744 | static void __exit moschip7840_exit(void) |
| 2745 | { |
| 2746 | |
| 2747 | dbg("%s \n", " mos7840_exit :entering.........."); |
| 2748 | |
| 2749 | usb_deregister(&io_driver); |
| 2750 | |
| 2751 | usb_serial_deregister(&moschip7840_4port_device); |
| 2752 | |
| 2753 | dbg("%s\n", "Entring..."); |
| 2754 | } |
| 2755 | |
| 2756 | module_init(moschip7840_init); |
| 2757 | module_exit(moschip7840_exit); |
| 2758 | |
| 2759 | /* Module information */ |
| 2760 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 2761 | MODULE_LICENSE("GPL"); |
| 2762 | |
| 2763 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 2764 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |