Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * mxser.c -- MOXA Smartio/Industio family multiport serial driver. |
| 3 | * |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 4 | * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). |
| 5 | * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 7 | * This code is loosely based on the 1.8 moxa driver which is based on |
| 8 | * Linux serial driver, written by Linus Torvalds, Theodore T'so and |
| 9 | * others. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 14 | * (at your option) any later version. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox |
| 17 | * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com. |
| 18 | * - Fixed x86_64 cleanness |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | */ |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/signal.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/timer.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/tty.h> |
| 28 | #include <linux/tty_flip.h> |
| 29 | #include <linux/serial.h> |
| 30 | #include <linux/serial_reg.h> |
| 31 | #include <linux/major.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/fcntl.h> |
| 34 | #include <linux/ptrace.h> |
| 35 | #include <linux/gfp.h> |
| 36 | #include <linux/ioport.h> |
| 37 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/delay.h> |
| 39 | #include <linux/pci.h> |
Jiri Slaby | 1977f03 | 2007-10-18 23:40:25 -0700 | [diff] [blame] | 40 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include <asm/system.h> |
| 43 | #include <asm/io.h> |
| 44 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <asm/uaccess.h> |
| 46 | |
| 47 | #include "mxser.h" |
| 48 | |
Jiri Slaby | e129def | 2008-07-22 11:20:34 +0100 | [diff] [blame] | 49 | #define MXSER_VERSION "2.0.4" /* 1.12 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define MXSERMAJOR 174 |
| 51 | #define MXSERCUMAJOR 175 |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define MXSER_BOARDS 4 /* Max. boards */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 55 | #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) |
| 56 | #define MXSER_ISR_PASS_LIMIT 100 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 58 | /*CheckIsMoxaMust return value*/ |
| 59 | #define MOXA_OTHER_UART 0x00 |
| 60 | #define MOXA_MUST_MU150_HWID 0x01 |
| 61 | #define MOXA_MUST_MU860_HWID 0x02 |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #define WAKEUP_CHARS 256 |
| 64 | |
| 65 | #define UART_MCR_AFE 0x20 |
| 66 | #define UART_LSR_SPECIAL 0x1E |
| 67 | |
Jiri Slaby | e129def | 2008-07-22 11:20:34 +0100 | [diff] [blame] | 68 | #define PCI_DEVICE_ID_POS104UL 0x1044 |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 69 | #define PCI_DEVICE_ID_CB108 0x1080 |
Jiri Slaby | e129def | 2008-07-22 11:20:34 +0100 | [diff] [blame] | 70 | #define PCI_DEVICE_ID_CP102UF 0x1023 |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 71 | #define PCI_DEVICE_ID_CB114 0x1142 |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 72 | #define PCI_DEVICE_ID_CP114UL 0x1143 |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 73 | #define PCI_DEVICE_ID_CB134I 0x1341 |
| 74 | #define PCI_DEVICE_ID_CP138U 0x1380 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | #define C168_ASIC_ID 1 |
| 78 | #define C104_ASIC_ID 2 |
| 79 | #define C102_ASIC_ID 0xB |
| 80 | #define CI132_ASIC_ID 4 |
| 81 | #define CI134_ASIC_ID 3 |
| 82 | #define CI104J_ASIC_ID 5 |
| 83 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 84 | #define MXSER_HIGHBAUD 1 |
| 85 | #define MXSER_HAS2 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 87 | /* This is only for PCI */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 88 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | int type; |
| 90 | int tx_fifo; |
| 91 | int rx_fifo; |
| 92 | int xmit_fifo_size; |
| 93 | int rx_high_water; |
| 94 | int rx_trigger; |
| 95 | int rx_low_water; |
| 96 | long max_baud; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 97 | } Gpci_uart_info[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, |
| 99 | {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, |
| 100 | {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} |
| 101 | }; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 102 | #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 104 | struct mxser_cardinfo { |
| 105 | char *name; |
| 106 | unsigned int nports; |
| 107 | unsigned int flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 110 | static const struct mxser_cardinfo mxser_cards[] = { |
| 111 | /* 0*/ { "C168 series", 8, }, |
| 112 | { "C104 series", 4, }, |
| 113 | { "CI-104J series", 4, }, |
| 114 | { "C168H/PCI series", 8, }, |
| 115 | { "C104H/PCI series", 4, }, |
| 116 | /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */ |
| 117 | { "CI-132 series", 4, MXSER_HAS2 }, |
| 118 | { "CI-134 series", 4, }, |
| 119 | { "CP-132 series", 2, }, |
| 120 | { "CP-114 series", 4, }, |
| 121 | /*10*/ { "CT-114 series", 4, }, |
| 122 | { "CP-102 series", 2, MXSER_HIGHBAUD }, |
| 123 | { "CP-104U series", 4, }, |
| 124 | { "CP-168U series", 8, }, |
| 125 | { "CP-132U series", 2, }, |
| 126 | /*15*/ { "CP-134U series", 4, }, |
| 127 | { "CP-104JU series", 4, }, |
| 128 | { "Moxa UC7000 Serial", 8, }, /* RC7000 */ |
| 129 | { "CP-118U series", 8, }, |
| 130 | { "CP-102UL series", 2, }, |
| 131 | /*20*/ { "CP-102U series", 2, }, |
| 132 | { "CP-118EL series", 8, }, |
| 133 | { "CP-168EL series", 8, }, |
| 134 | { "CP-104EL series", 4, }, |
| 135 | { "CB-108 series", 8, }, |
| 136 | /*25*/ { "CB-114 series", 4, }, |
| 137 | { "CB-134I series", 4, }, |
| 138 | { "CP-138U series", 8, }, |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 139 | { "POS-104UL series", 4, }, |
Jiri Slaby | e129def | 2008-07-22 11:20:34 +0100 | [diff] [blame] | 140 | { "CP-114UL series", 4, }, |
| 141 | /*30*/ { "CP-102UF series", 2, } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 142 | }; |
| 143 | |
| 144 | /* driver_data correspond to the lines in the structure above |
| 145 | see also ISA probe function before you change something */ |
| 146 | static struct pci_device_id mxser_pcibrds[] = { |
| 147 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, |
| 148 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, |
| 149 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, |
| 150 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, |
| 151 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, |
| 152 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, |
| 153 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, |
| 154 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, |
| 155 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, |
| 156 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, |
| 157 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 }, |
| 158 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, |
| 159 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, |
| 160 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 }, |
| 161 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, |
| 162 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 }, |
| 163 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 }, |
| 164 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 }, |
| 165 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 }, |
| 166 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 }, |
| 167 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 }, |
| 168 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 }, |
| 169 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 }, |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 170 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, |
Jiri Slaby | e129def | 2008-07-22 11:20:34 +0100 | [diff] [blame] | 171 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 }, |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 172 | { } |
| 173 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | MODULE_DEVICE_TABLE(pci, mxser_pcibrds); |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 }; |
| 177 | static int ttymajor = MXSERMAJOR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | /* Variables for insmod */ |
| 180 | |
| 181 | MODULE_AUTHOR("Casper Yang"); |
| 182 | MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); |
Rusty Russell | 8d3b33f | 2006-03-25 03:07:05 -0800 | [diff] [blame] | 183 | module_param_array(ioaddr, int, NULL, 0); |
| 184 | module_param(ttymajor, int, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | MODULE_LICENSE("GPL"); |
| 186 | |
| 187 | struct mxser_log { |
| 188 | int tick; |
| 189 | unsigned long rxcnt[MXSER_PORTS]; |
| 190 | unsigned long txcnt[MXSER_PORTS]; |
| 191 | }; |
| 192 | |
| 193 | |
| 194 | struct mxser_mon { |
| 195 | unsigned long rxcnt; |
| 196 | unsigned long txcnt; |
| 197 | unsigned long up_rxcnt; |
| 198 | unsigned long up_txcnt; |
| 199 | int modem_status; |
| 200 | unsigned char hold_reason; |
| 201 | }; |
| 202 | |
| 203 | struct mxser_mon_ext { |
| 204 | unsigned long rx_cnt[32]; |
| 205 | unsigned long tx_cnt[32]; |
| 206 | unsigned long up_rxcnt[32]; |
| 207 | unsigned long up_txcnt[32]; |
| 208 | int modem_status[32]; |
| 209 | |
| 210 | long baudrate[32]; |
| 211 | int databits[32]; |
| 212 | int stopbits[32]; |
| 213 | int parity[32]; |
| 214 | int flowctrl[32]; |
| 215 | int fifo[32]; |
| 216 | int iftype[32]; |
| 217 | }; |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 218 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 219 | struct mxser_board; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 221 | struct mxser_port { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 222 | struct tty_port port; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 223 | struct mxser_board *board; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 224 | |
| 225 | unsigned long ioaddr; |
| 226 | unsigned long opmode_ioaddr; |
| 227 | int max_baud; |
| 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | int rx_high_water; |
| 230 | int rx_trigger; /* Rx fifo trigger level */ |
| 231 | int rx_low_water; |
| 232 | int baud_base; /* max. speed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | int type; /* UART type */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 234 | |
| 235 | int x_char; /* xon/xoff character */ |
| 236 | int IER; /* Interrupt Enable Register */ |
| 237 | int MCR; /* Modem control register */ |
| 238 | |
| 239 | unsigned char stop_rx; |
| 240 | unsigned char ldisc_stop_rx; |
| 241 | |
| 242 | int custom_divisor; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 243 | unsigned char err_shadow; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 244 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 245 | struct async_icount icount; /* kernel counters for 4 input interrupts */ |
| 246 | int timeout; |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | int read_status_mask; |
| 249 | int ignore_status_mask; |
| 250 | int xmit_fifo_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | int xmit_head; |
| 252 | int xmit_tail; |
| 253 | int xmit_cnt; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 254 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 255 | struct ktermios normal_termios; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | struct mxser_mon mon_data; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | spinlock_t slock; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 260 | wait_queue_head_t delta_msr_wait; |
| 261 | }; |
| 262 | |
| 263 | struct mxser_board { |
| 264 | unsigned int idx; |
| 265 | int irq; |
| 266 | const struct mxser_cardinfo *info; |
| 267 | unsigned long vector; |
| 268 | unsigned long vector_mask; |
| 269 | |
| 270 | int chip_flag; |
| 271 | int uart_type; |
| 272 | |
| 273 | struct mxser_port ports[MXSER_PORTS_PER_BOARD]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | }; |
| 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | struct mxser_mstatus { |
| 277 | tcflag_t cflag; |
| 278 | int cts; |
| 279 | int dsr; |
| 280 | int ri; |
| 281 | int dcd; |
| 282 | }; |
| 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | static int mxserBoardCAP[MXSER_BOARDS] = { |
| 285 | 0, 0, 0, 0 |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 286 | /* 0x180, 0x280, 0x200, 0x320 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | }; |
| 288 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 289 | static struct mxser_board mxser_boards[MXSER_BOARDS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | static struct tty_driver *mxvar_sdriver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | static struct mxser_log mxvar_log; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | static int mxser_set_baud_method[MXSER_PORTS + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 294 | static void mxser_enable_must_enchance_mode(unsigned long baseio) |
| 295 | { |
| 296 | u8 oldlcr; |
| 297 | u8 efr; |
| 298 | |
| 299 | oldlcr = inb(baseio + UART_LCR); |
| 300 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 301 | |
| 302 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 303 | efr |= MOXA_MUST_EFR_EFRB_ENABLE; |
| 304 | |
| 305 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 306 | outb(oldlcr, baseio + UART_LCR); |
| 307 | } |
| 308 | |
| 309 | static void mxser_disable_must_enchance_mode(unsigned long baseio) |
| 310 | { |
| 311 | u8 oldlcr; |
| 312 | u8 efr; |
| 313 | |
| 314 | oldlcr = inb(baseio + UART_LCR); |
| 315 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 316 | |
| 317 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 318 | efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; |
| 319 | |
| 320 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 321 | outb(oldlcr, baseio + UART_LCR); |
| 322 | } |
| 323 | |
| 324 | static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) |
| 325 | { |
| 326 | u8 oldlcr; |
| 327 | u8 efr; |
| 328 | |
| 329 | oldlcr = inb(baseio + UART_LCR); |
| 330 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 331 | |
| 332 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 333 | efr &= ~MOXA_MUST_EFR_BANK_MASK; |
| 334 | efr |= MOXA_MUST_EFR_BANK0; |
| 335 | |
| 336 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 337 | outb(value, baseio + MOXA_MUST_XON1_REGISTER); |
| 338 | outb(oldlcr, baseio + UART_LCR); |
| 339 | } |
| 340 | |
| 341 | static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) |
| 342 | { |
| 343 | u8 oldlcr; |
| 344 | u8 efr; |
| 345 | |
| 346 | oldlcr = inb(baseio + UART_LCR); |
| 347 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 348 | |
| 349 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 350 | efr &= ~MOXA_MUST_EFR_BANK_MASK; |
| 351 | efr |= MOXA_MUST_EFR_BANK0; |
| 352 | |
| 353 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 354 | outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); |
| 355 | outb(oldlcr, baseio + UART_LCR); |
| 356 | } |
| 357 | |
| 358 | static void mxser_set_must_fifo_value(struct mxser_port *info) |
| 359 | { |
| 360 | u8 oldlcr; |
| 361 | u8 efr; |
| 362 | |
| 363 | oldlcr = inb(info->ioaddr + UART_LCR); |
| 364 | outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); |
| 365 | |
| 366 | efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); |
| 367 | efr &= ~MOXA_MUST_EFR_BANK_MASK; |
| 368 | efr |= MOXA_MUST_EFR_BANK1; |
| 369 | |
| 370 | outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); |
| 371 | outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); |
| 372 | outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); |
| 373 | outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); |
| 374 | outb(oldlcr, info->ioaddr + UART_LCR); |
| 375 | } |
| 376 | |
| 377 | static void mxser_set_must_enum_value(unsigned long baseio, u8 value) |
| 378 | { |
| 379 | u8 oldlcr; |
| 380 | u8 efr; |
| 381 | |
| 382 | oldlcr = inb(baseio + UART_LCR); |
| 383 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 384 | |
| 385 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 386 | efr &= ~MOXA_MUST_EFR_BANK_MASK; |
| 387 | efr |= MOXA_MUST_EFR_BANK2; |
| 388 | |
| 389 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 390 | outb(value, baseio + MOXA_MUST_ENUM_REGISTER); |
| 391 | outb(oldlcr, baseio + UART_LCR); |
| 392 | } |
| 393 | |
| 394 | static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) |
| 395 | { |
| 396 | u8 oldlcr; |
| 397 | u8 efr; |
| 398 | |
| 399 | oldlcr = inb(baseio + UART_LCR); |
| 400 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 401 | |
| 402 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 403 | efr &= ~MOXA_MUST_EFR_BANK_MASK; |
| 404 | efr |= MOXA_MUST_EFR_BANK2; |
| 405 | |
| 406 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 407 | *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); |
| 408 | outb(oldlcr, baseio + UART_LCR); |
| 409 | } |
| 410 | |
| 411 | static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) |
| 412 | { |
| 413 | u8 oldlcr; |
| 414 | u8 efr; |
| 415 | |
| 416 | oldlcr = inb(baseio + UART_LCR); |
| 417 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 418 | |
| 419 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 420 | efr &= ~MOXA_MUST_EFR_SF_MASK; |
| 421 | |
| 422 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 423 | outb(oldlcr, baseio + UART_LCR); |
| 424 | } |
| 425 | |
| 426 | static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) |
| 427 | { |
| 428 | u8 oldlcr; |
| 429 | u8 efr; |
| 430 | |
| 431 | oldlcr = inb(baseio + UART_LCR); |
| 432 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 433 | |
| 434 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 435 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; |
| 436 | efr |= MOXA_MUST_EFR_SF_TX1; |
| 437 | |
| 438 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 439 | outb(oldlcr, baseio + UART_LCR); |
| 440 | } |
| 441 | |
| 442 | static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) |
| 443 | { |
| 444 | u8 oldlcr; |
| 445 | u8 efr; |
| 446 | |
| 447 | oldlcr = inb(baseio + UART_LCR); |
| 448 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 449 | |
| 450 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 451 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; |
| 452 | |
| 453 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 454 | outb(oldlcr, baseio + UART_LCR); |
| 455 | } |
| 456 | |
| 457 | static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) |
| 458 | { |
| 459 | u8 oldlcr; |
| 460 | u8 efr; |
| 461 | |
| 462 | oldlcr = inb(baseio + UART_LCR); |
| 463 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 464 | |
| 465 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 466 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; |
| 467 | efr |= MOXA_MUST_EFR_SF_RX1; |
| 468 | |
| 469 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 470 | outb(oldlcr, baseio + UART_LCR); |
| 471 | } |
| 472 | |
| 473 | static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) |
| 474 | { |
| 475 | u8 oldlcr; |
| 476 | u8 efr; |
| 477 | |
| 478 | oldlcr = inb(baseio + UART_LCR); |
| 479 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); |
| 480 | |
| 481 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); |
| 482 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; |
| 483 | |
| 484 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); |
| 485 | outb(oldlcr, baseio + UART_LCR); |
| 486 | } |
| 487 | |
Jesper Juhl | b8cc554 | 2007-10-18 03:06:03 -0700 | [diff] [blame] | 488 | #ifdef CONFIG_PCI |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 489 | static int __devinit CheckIsMoxaMust(unsigned long io) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | { |
| 491 | u8 oldmcr, hwid; |
| 492 | int i; |
| 493 | |
| 494 | outb(0, io + UART_LCR); |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 495 | mxser_disable_must_enchance_mode(io); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | oldmcr = inb(io + UART_MCR); |
| 497 | outb(0, io + UART_MCR); |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 498 | mxser_set_must_xon1_value(io, 0x11); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if ((hwid = inb(io + UART_MCR)) != 0) { |
| 500 | outb(oldmcr, io + UART_MCR); |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 501 | return MOXA_OTHER_UART; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 504 | mxser_get_must_hardware_id(io, &hwid); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 505 | for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ |
| 506 | if (hwid == Gpci_uart_info[i].type) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 507 | return (int)hwid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | return MOXA_OTHER_UART; |
| 510 | } |
Jesper Juhl | b8cc554 | 2007-10-18 03:06:03 -0700 | [diff] [blame] | 511 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 513 | static void process_txrx_fifo(struct mxser_port *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | { |
| 515 | int i; |
| 516 | |
| 517 | if ((info->type == PORT_16450) || (info->type == PORT_8250)) { |
| 518 | info->rx_trigger = 1; |
| 519 | info->rx_high_water = 1; |
| 520 | info->rx_low_water = 1; |
| 521 | info->xmit_fifo_size = 1; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 522 | } else |
| 523 | for (i = 0; i < UART_INFO_NUM; i++) |
| 524 | if (info->board->chip_flag == Gpci_uart_info[i].type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | info->rx_trigger = Gpci_uart_info[i].rx_trigger; |
| 526 | info->rx_low_water = Gpci_uart_info[i].rx_low_water; |
| 527 | info->rx_high_water = Gpci_uart_info[i].rx_high_water; |
| 528 | info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; |
| 529 | break; |
| 530 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 533 | static unsigned char mxser_get_msr(int baseaddr, int mode, int port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | { |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 535 | static unsigned char mxser_msr[MXSER_PORTS + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | unsigned char status = 0; |
| 537 | |
| 538 | status = inb(baseaddr + UART_MSR); |
| 539 | |
| 540 | mxser_msr[port] &= 0x0F; |
| 541 | mxser_msr[port] |= status; |
| 542 | status = mxser_msr[port]; |
| 543 | if (mode) |
| 544 | mxser_msr[port] = 0; |
| 545 | |
| 546 | return status; |
| 547 | } |
| 548 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 549 | static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, |
| 550 | struct mxser_port *port) |
| 551 | { |
| 552 | DECLARE_WAITQUEUE(wait, current); |
| 553 | int retval; |
| 554 | int do_clocal = 0; |
| 555 | unsigned long flags; |
| 556 | |
| 557 | /* |
| 558 | * If non-blocking mode is set, or the port is not enabled, |
| 559 | * then make the check up front and then exit. |
| 560 | */ |
| 561 | if ((filp->f_flags & O_NONBLOCK) || |
| 562 | test_bit(TTY_IO_ERROR, &tty->flags)) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 563 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | if (tty->termios->c_cflag & CLOCAL) |
| 568 | do_clocal = 1; |
| 569 | |
| 570 | /* |
| 571 | * Block waiting for the carrier detect and the line to become |
| 572 | * free (i.e., not in use by the callout). While we are in |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 573 | * this loop, port->port.count is dropped by one, so that |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 574 | * mxser_close() knows when to free things. We restore it upon |
| 575 | * exit, either normal or abnormal. |
| 576 | */ |
| 577 | retval = 0; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 578 | add_wait_queue(&port->port.open_wait, &wait); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 579 | |
| 580 | spin_lock_irqsave(&port->slock, flags); |
| 581 | if (!tty_hung_up_p(filp)) |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 582 | port->port.count--; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 583 | spin_unlock_irqrestore(&port->slock, flags); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 584 | port->port.blocked_open++; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 585 | while (1) { |
| 586 | spin_lock_irqsave(&port->slock, flags); |
| 587 | outb(inb(port->ioaddr + UART_MCR) | |
| 588 | UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR); |
| 589 | spin_unlock_irqrestore(&port->slock, flags); |
| 590 | set_current_state(TASK_INTERRUPTIBLE); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 591 | if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) { |
| 592 | if (port->port.flags & ASYNC_HUP_NOTIFY) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 593 | retval = -EAGAIN; |
| 594 | else |
| 595 | retval = -ERESTARTSYS; |
| 596 | break; |
| 597 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 598 | if (!(port->port.flags & ASYNC_CLOSING) && |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 599 | (do_clocal || |
| 600 | (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD))) |
| 601 | break; |
| 602 | if (signal_pending(current)) { |
| 603 | retval = -ERESTARTSYS; |
| 604 | break; |
| 605 | } |
| 606 | schedule(); |
| 607 | } |
| 608 | set_current_state(TASK_RUNNING); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 609 | remove_wait_queue(&port->port.open_wait, &wait); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 610 | if (!tty_hung_up_p(filp)) |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 611 | port->port.count++; |
| 612 | port->port.blocked_open--; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 613 | if (retval) |
| 614 | return retval; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 615 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 616 | return 0; |
| 617 | } |
| 618 | |
| 619 | static int mxser_set_baud(struct mxser_port *info, long newspd) |
| 620 | { |
| 621 | int quot = 0, baud; |
| 622 | unsigned char cval; |
| 623 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 624 | if (!info->port.tty || !info->port.tty->termios) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 625 | return -1; |
| 626 | |
| 627 | if (!(info->ioaddr)) |
| 628 | return -1; |
| 629 | |
| 630 | if (newspd > info->max_baud) |
| 631 | return -1; |
| 632 | |
| 633 | if (newspd == 134) { |
| 634 | quot = 2 * info->baud_base / 269; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 635 | tty_encode_baud_rate(info->port.tty, 134, 134); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 636 | } else if (newspd) { |
| 637 | quot = info->baud_base / newspd; |
| 638 | if (quot == 0) |
| 639 | quot = 1; |
| 640 | baud = info->baud_base/quot; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 641 | tty_encode_baud_rate(info->port.tty, baud, baud); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 642 | } else { |
| 643 | quot = 0; |
| 644 | } |
| 645 | |
| 646 | info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); |
| 647 | info->timeout += HZ / 50; /* Add .02 seconds of slop */ |
| 648 | |
| 649 | if (quot) { |
| 650 | info->MCR |= UART_MCR_DTR; |
| 651 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 652 | } else { |
| 653 | info->MCR &= ~UART_MCR_DTR; |
| 654 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | cval = inb(info->ioaddr + UART_LCR); |
| 659 | |
| 660 | outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ |
| 661 | |
| 662 | outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ |
| 663 | outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ |
| 664 | outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ |
| 665 | |
| 666 | #ifdef BOTHER |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 667 | if (C_BAUD(info->port.tty) == BOTHER) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 668 | quot = info->baud_base % newspd; |
| 669 | quot *= 8; |
| 670 | if (quot % newspd > newspd / 2) { |
| 671 | quot /= newspd; |
| 672 | quot++; |
| 673 | } else |
| 674 | quot /= newspd; |
| 675 | |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 676 | mxser_set_must_enum_value(info->ioaddr, quot); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 677 | } else |
| 678 | #endif |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 679 | mxser_set_must_enum_value(info->ioaddr, 0); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | /* |
| 685 | * This routine is called to set the UART divisor registers to match |
| 686 | * the specified baud rate for a serial port. |
| 687 | */ |
| 688 | static int mxser_change_speed(struct mxser_port *info, |
| 689 | struct ktermios *old_termios) |
| 690 | { |
| 691 | unsigned cflag, cval, fcr; |
| 692 | int ret = 0; |
| 693 | unsigned char status; |
| 694 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 695 | if (!info->port.tty || !info->port.tty->termios) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 696 | return ret; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 697 | cflag = info->port.tty->termios->c_cflag; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 698 | if (!(info->ioaddr)) |
| 699 | return ret; |
| 700 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 701 | if (mxser_set_baud_method[info->port.tty->index] == 0) |
| 702 | mxser_set_baud(info, tty_get_baud_rate(info->port.tty)); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 703 | |
| 704 | /* byte size and parity */ |
| 705 | switch (cflag & CSIZE) { |
| 706 | case CS5: |
| 707 | cval = 0x00; |
| 708 | break; |
| 709 | case CS6: |
| 710 | cval = 0x01; |
| 711 | break; |
| 712 | case CS7: |
| 713 | cval = 0x02; |
| 714 | break; |
| 715 | case CS8: |
| 716 | cval = 0x03; |
| 717 | break; |
| 718 | default: |
| 719 | cval = 0x00; |
| 720 | break; /* too keep GCC shut... */ |
| 721 | } |
| 722 | if (cflag & CSTOPB) |
| 723 | cval |= 0x04; |
| 724 | if (cflag & PARENB) |
| 725 | cval |= UART_LCR_PARITY; |
| 726 | if (!(cflag & PARODD)) |
| 727 | cval |= UART_LCR_EPAR; |
| 728 | if (cflag & CMSPAR) |
| 729 | cval |= UART_LCR_SPAR; |
| 730 | |
| 731 | if ((info->type == PORT_8250) || (info->type == PORT_16450)) { |
| 732 | if (info->board->chip_flag) { |
| 733 | fcr = UART_FCR_ENABLE_FIFO; |
| 734 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 735 | mxser_set_must_fifo_value(info); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 736 | } else |
| 737 | fcr = 0; |
| 738 | } else { |
| 739 | fcr = UART_FCR_ENABLE_FIFO; |
| 740 | if (info->board->chip_flag) { |
| 741 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 742 | mxser_set_must_fifo_value(info); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 743 | } else { |
| 744 | switch (info->rx_trigger) { |
| 745 | case 1: |
| 746 | fcr |= UART_FCR_TRIGGER_1; |
| 747 | break; |
| 748 | case 4: |
| 749 | fcr |= UART_FCR_TRIGGER_4; |
| 750 | break; |
| 751 | case 8: |
| 752 | fcr |= UART_FCR_TRIGGER_8; |
| 753 | break; |
| 754 | default: |
| 755 | fcr |= UART_FCR_TRIGGER_14; |
| 756 | break; |
| 757 | } |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | /* CTS flow control flag and modem status interrupts */ |
| 762 | info->IER &= ~UART_IER_MSI; |
| 763 | info->MCR &= ~UART_MCR_AFE; |
| 764 | if (cflag & CRTSCTS) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 765 | info->port.flags |= ASYNC_CTS_FLOW; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 766 | info->IER |= UART_IER_MSI; |
| 767 | if ((info->type == PORT_16550A) || (info->board->chip_flag)) { |
| 768 | info->MCR |= UART_MCR_AFE; |
| 769 | } else { |
| 770 | status = inb(info->ioaddr + UART_MSR); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 771 | if (info->port.tty->hw_stopped) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 772 | if (status & UART_MSR_CTS) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 773 | info->port.tty->hw_stopped = 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 774 | if (info->type != PORT_16550A && |
| 775 | !info->board->chip_flag) { |
| 776 | outb(info->IER & ~UART_IER_THRI, |
| 777 | info->ioaddr + |
| 778 | UART_IER); |
| 779 | info->IER |= UART_IER_THRI; |
| 780 | outb(info->IER, info->ioaddr + |
| 781 | UART_IER); |
| 782 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 783 | tty_wakeup(info->port.tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 784 | } |
| 785 | } else { |
| 786 | if (!(status & UART_MSR_CTS)) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 787 | info->port.tty->hw_stopped = 1; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 788 | if ((info->type != PORT_16550A) && |
| 789 | (!info->board->chip_flag)) { |
| 790 | info->IER &= ~UART_IER_THRI; |
| 791 | outb(info->IER, info->ioaddr + |
| 792 | UART_IER); |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | } |
| 797 | } else { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 798 | info->port.flags &= ~ASYNC_CTS_FLOW; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 799 | } |
| 800 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 801 | if (cflag & CLOCAL) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 802 | info->port.flags &= ~ASYNC_CHECK_CD; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 803 | } else { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 804 | info->port.flags |= ASYNC_CHECK_CD; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 805 | info->IER |= UART_IER_MSI; |
| 806 | } |
| 807 | outb(info->IER, info->ioaddr + UART_IER); |
| 808 | |
| 809 | /* |
| 810 | * Set up parity check flag |
| 811 | */ |
| 812 | info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 813 | if (I_INPCK(info->port.tty)) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 814 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 815 | if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 816 | info->read_status_mask |= UART_LSR_BI; |
| 817 | |
| 818 | info->ignore_status_mask = 0; |
| 819 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 820 | if (I_IGNBRK(info->port.tty)) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 821 | info->ignore_status_mask |= UART_LSR_BI; |
| 822 | info->read_status_mask |= UART_LSR_BI; |
| 823 | /* |
| 824 | * If we're ignore parity and break indicators, ignore |
| 825 | * overruns too. (For real raw support). |
| 826 | */ |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 827 | if (I_IGNPAR(info->port.tty)) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 828 | info->ignore_status_mask |= |
| 829 | UART_LSR_OE | |
| 830 | UART_LSR_PE | |
| 831 | UART_LSR_FE; |
| 832 | info->read_status_mask |= |
| 833 | UART_LSR_OE | |
| 834 | UART_LSR_PE | |
| 835 | UART_LSR_FE; |
| 836 | } |
| 837 | } |
| 838 | if (info->board->chip_flag) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 839 | mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty)); |
| 840 | mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty)); |
| 841 | if (I_IXON(info->port.tty)) { |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 842 | mxser_enable_must_rx_software_flow_control( |
| 843 | info->ioaddr); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 844 | } else { |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 845 | mxser_disable_must_rx_software_flow_control( |
| 846 | info->ioaddr); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 847 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 848 | if (I_IXOFF(info->port.tty)) { |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 849 | mxser_enable_must_tx_software_flow_control( |
| 850 | info->ioaddr); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 851 | } else { |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 852 | mxser_disable_must_tx_software_flow_control( |
| 853 | info->ioaddr); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 854 | } |
| 855 | } |
| 856 | |
| 857 | |
| 858 | outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ |
| 859 | outb(cval, info->ioaddr + UART_LCR); |
| 860 | |
| 861 | return ret; |
| 862 | } |
| 863 | |
| 864 | static void mxser_check_modem_status(struct mxser_port *port, int status) |
| 865 | { |
| 866 | /* update input line counters */ |
| 867 | if (status & UART_MSR_TERI) |
| 868 | port->icount.rng++; |
| 869 | if (status & UART_MSR_DDSR) |
| 870 | port->icount.dsr++; |
| 871 | if (status & UART_MSR_DDCD) |
| 872 | port->icount.dcd++; |
| 873 | if (status & UART_MSR_DCTS) |
| 874 | port->icount.cts++; |
| 875 | port->mon_data.modem_status = status; |
| 876 | wake_up_interruptible(&port->delta_msr_wait); |
| 877 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 878 | if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 879 | if (status & UART_MSR_DCD) |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 880 | wake_up_interruptible(&port->port.open_wait); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 881 | } |
| 882 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 883 | if (port->port.flags & ASYNC_CTS_FLOW) { |
| 884 | if (port->port.tty->hw_stopped) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 885 | if (status & UART_MSR_CTS) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 886 | port->port.tty->hw_stopped = 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 887 | |
| 888 | if ((port->type != PORT_16550A) && |
| 889 | (!port->board->chip_flag)) { |
| 890 | outb(port->IER & ~UART_IER_THRI, |
| 891 | port->ioaddr + UART_IER); |
| 892 | port->IER |= UART_IER_THRI; |
| 893 | outb(port->IER, port->ioaddr + |
| 894 | UART_IER); |
| 895 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 896 | tty_wakeup(port->port.tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 897 | } |
| 898 | } else { |
| 899 | if (!(status & UART_MSR_CTS)) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 900 | port->port.tty->hw_stopped = 1; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 901 | if (port->type != PORT_16550A && |
| 902 | !port->board->chip_flag) { |
| 903 | port->IER &= ~UART_IER_THRI; |
| 904 | outb(port->IER, port->ioaddr + |
| 905 | UART_IER); |
| 906 | } |
| 907 | } |
| 908 | } |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | static int mxser_startup(struct mxser_port *info) |
| 913 | { |
| 914 | unsigned long page; |
| 915 | unsigned long flags; |
| 916 | |
| 917 | page = __get_free_page(GFP_KERNEL); |
| 918 | if (!page) |
| 919 | return -ENOMEM; |
| 920 | |
| 921 | spin_lock_irqsave(&info->slock, flags); |
| 922 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 923 | if (info->port.flags & ASYNC_INITIALIZED) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 924 | free_page(page); |
| 925 | spin_unlock_irqrestore(&info->slock, flags); |
| 926 | return 0; |
| 927 | } |
| 928 | |
| 929 | if (!info->ioaddr || !info->type) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 930 | if (info->port.tty) |
| 931 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 932 | free_page(page); |
| 933 | spin_unlock_irqrestore(&info->slock, flags); |
| 934 | return 0; |
| 935 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 936 | if (info->port.xmit_buf) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 937 | free_page(page); |
| 938 | else |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 939 | info->port.xmit_buf = (unsigned char *) page; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 940 | |
| 941 | /* |
| 942 | * Clear the FIFO buffers and disable them |
| 943 | * (they will be reenabled in mxser_change_speed()) |
| 944 | */ |
| 945 | if (info->board->chip_flag) |
| 946 | outb((UART_FCR_CLEAR_RCVR | |
| 947 | UART_FCR_CLEAR_XMIT | |
| 948 | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); |
| 949 | else |
| 950 | outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), |
| 951 | info->ioaddr + UART_FCR); |
| 952 | |
| 953 | /* |
| 954 | * At this point there's no way the LSR could still be 0xFF; |
| 955 | * if it is, then bail out, because there's likely no UART |
| 956 | * here. |
| 957 | */ |
| 958 | if (inb(info->ioaddr + UART_LSR) == 0xff) { |
| 959 | spin_unlock_irqrestore(&info->slock, flags); |
| 960 | if (capable(CAP_SYS_ADMIN)) { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 961 | if (info->port.tty) |
| 962 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 963 | return 0; |
| 964 | } else |
| 965 | return -ENODEV; |
| 966 | } |
| 967 | |
| 968 | /* |
| 969 | * Clear the interrupt registers. |
| 970 | */ |
| 971 | (void) inb(info->ioaddr + UART_LSR); |
| 972 | (void) inb(info->ioaddr + UART_RX); |
| 973 | (void) inb(info->ioaddr + UART_IIR); |
| 974 | (void) inb(info->ioaddr + UART_MSR); |
| 975 | |
| 976 | /* |
| 977 | * Now, initialize the UART |
| 978 | */ |
| 979 | outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ |
| 980 | info->MCR = UART_MCR_DTR | UART_MCR_RTS; |
| 981 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 982 | |
| 983 | /* |
| 984 | * Finally, enable interrupts |
| 985 | */ |
| 986 | info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; |
| 987 | |
| 988 | if (info->board->chip_flag) |
| 989 | info->IER |= MOXA_MUST_IER_EGDAI; |
| 990 | outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ |
| 991 | |
| 992 | /* |
| 993 | * And clear the interrupt registers again for luck. |
| 994 | */ |
| 995 | (void) inb(info->ioaddr + UART_LSR); |
| 996 | (void) inb(info->ioaddr + UART_RX); |
| 997 | (void) inb(info->ioaddr + UART_IIR); |
| 998 | (void) inb(info->ioaddr + UART_MSR); |
| 999 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1000 | if (info->port.tty) |
| 1001 | clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1002 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 1003 | |
| 1004 | /* |
| 1005 | * and set the speed of the serial port |
| 1006 | */ |
| 1007 | mxser_change_speed(info, NULL); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1008 | info->port.flags |= ASYNC_INITIALIZED; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1009 | spin_unlock_irqrestore(&info->slock, flags); |
| 1010 | |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * This routine will shutdown a serial port; interrupts maybe disabled, and |
| 1016 | * DTR is dropped if the hangup on close termio flag is on. |
| 1017 | */ |
| 1018 | static void mxser_shutdown(struct mxser_port *info) |
| 1019 | { |
| 1020 | unsigned long flags; |
| 1021 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1022 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1023 | return; |
| 1024 | |
| 1025 | spin_lock_irqsave(&info->slock, flags); |
| 1026 | |
| 1027 | /* |
| 1028 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq |
| 1029 | * here so the queue might never be waken up |
| 1030 | */ |
| 1031 | wake_up_interruptible(&info->delta_msr_wait); |
| 1032 | |
| 1033 | /* |
| 1034 | * Free the IRQ, if necessary |
| 1035 | */ |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1036 | if (info->port.xmit_buf) { |
| 1037 | free_page((unsigned long) info->port.xmit_buf); |
| 1038 | info->port.xmit_buf = NULL; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | info->IER = 0; |
| 1042 | outb(0x00, info->ioaddr + UART_IER); |
| 1043 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1044 | if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1045 | info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS); |
| 1046 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 1047 | |
| 1048 | /* clear Rx/Tx FIFO's */ |
| 1049 | if (info->board->chip_flag) |
| 1050 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | |
| 1051 | MOXA_MUST_FCR_GDA_MODE_ENABLE, |
| 1052 | info->ioaddr + UART_FCR); |
| 1053 | else |
| 1054 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, |
| 1055 | info->ioaddr + UART_FCR); |
| 1056 | |
| 1057 | /* read data port to reset things */ |
| 1058 | (void) inb(info->ioaddr + UART_RX); |
| 1059 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1060 | if (info->port.tty) |
| 1061 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1062 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1063 | info->port.flags &= ~ASYNC_INITIALIZED; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1064 | |
| 1065 | if (info->board->chip_flag) |
| 1066 | SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); |
| 1067 | |
| 1068 | spin_unlock_irqrestore(&info->slock, flags); |
| 1069 | } |
| 1070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | /* |
| 1072 | * This routine is called whenever a serial port is opened. It |
| 1073 | * enables interrupts for a serial port, linking in its async structure into |
| 1074 | * the IRQ chain. It also performs the serial-specific |
| 1075 | * initialization for the tty structure. |
| 1076 | */ |
| 1077 | static int mxser_open(struct tty_struct *tty, struct file *filp) |
| 1078 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1079 | struct mxser_port *info; |
| 1080 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | int retval, line; |
| 1082 | |
| 1083 | line = tty->index; |
| 1084 | if (line == MXSER_PORTS) |
| 1085 | return 0; |
| 1086 | if (line < 0 || line > MXSER_PORTS) |
| 1087 | return -ENODEV; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1088 | info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; |
| 1089 | if (!info->ioaddr) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1090 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | tty->driver_data = info; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1093 | info->port.tty = tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | /* |
| 1095 | * Start up serial port |
| 1096 | */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1097 | spin_lock_irqsave(&info->slock, flags); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1098 | info->port.count++; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1099 | spin_unlock_irqrestore(&info->slock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | retval = mxser_startup(info); |
| 1101 | if (retval) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1102 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
| 1104 | retval = mxser_block_til_ready(tty, filp, info); |
| 1105 | if (retval) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1106 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | |
Cedric Le Goater | 8cddd70 | 2007-02-10 01:46:33 -0800 | [diff] [blame] | 1108 | /* unmark here for very high baud rate (ex. 921600 bps) used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | tty->low_latency = 1; |
| 1110 | return 0; |
| 1111 | } |
| 1112 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 1113 | static void mxser_flush_buffer(struct tty_struct *tty) |
| 1114 | { |
| 1115 | struct mxser_port *info = tty->driver_data; |
| 1116 | char fcr; |
| 1117 | unsigned long flags; |
| 1118 | |
| 1119 | |
| 1120 | spin_lock_irqsave(&info->slock, flags); |
| 1121 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| 1122 | |
| 1123 | fcr = inb(info->ioaddr + UART_FCR); |
| 1124 | outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), |
| 1125 | info->ioaddr + UART_FCR); |
| 1126 | outb(fcr, info->ioaddr + UART_FCR); |
| 1127 | |
| 1128 | spin_unlock_irqrestore(&info->slock, flags); |
| 1129 | |
| 1130 | tty_wakeup(tty); |
| 1131 | } |
| 1132 | |
| 1133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | /* |
| 1135 | * This routine is called when the serial port gets closed. First, we |
| 1136 | * wait for the last remaining data to be sent. Then, we unlink its |
| 1137 | * async structure from the interrupt chain if necessary, and we free |
| 1138 | * that IRQ if nothing is left in the chain. |
| 1139 | */ |
| 1140 | static void mxser_close(struct tty_struct *tty, struct file *filp) |
| 1141 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1142 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | unsigned long timeout; |
| 1145 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | if (tty->index == MXSER_PORTS) |
| 1148 | return; |
| 1149 | if (!info) |
Kirill Smelkov | 6f08b72 | 2005-11-07 00:59:23 -0800 | [diff] [blame] | 1150 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | spin_lock_irqsave(&info->slock, flags); |
| 1153 | |
| 1154 | if (tty_hung_up_p(filp)) { |
| 1155 | spin_unlock_irqrestore(&info->slock, flags); |
| 1156 | return; |
| 1157 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1158 | if ((tty->count == 1) && (info->port.count != 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | /* |
| 1160 | * Uh, oh. tty->count is 1, which means that the tty |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1161 | * structure will be freed. Info->port.count should always |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | * be one in these conditions. If it's greater than |
| 1163 | * one, we've got real problems, since it means the |
| 1164 | * serial port won't be shutdown. |
| 1165 | */ |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1166 | printk(KERN_ERR "mxser_close: bad serial port count; " |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1167 | "tty->count is 1, info->port.count is %d\n", info->port.count); |
| 1168 | info->port.count = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1170 | if (--info->port.count < 0) { |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1171 | printk(KERN_ERR "mxser_close: bad serial port count for " |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1172 | "ttys%d: %d\n", tty->index, info->port.count); |
| 1173 | info->port.count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1175 | if (info->port.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | spin_unlock_irqrestore(&info->slock, flags); |
| 1177 | return; |
| 1178 | } |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1179 | info->port.flags |= ASYNC_CLOSING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | spin_unlock_irqrestore(&info->slock, flags); |
| 1181 | /* |
| 1182 | * Save the termios structure, since this port may have |
| 1183 | * separate termios for callout and dialin. |
| 1184 | */ |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1185 | if (info->port.flags & ASYNC_NORMAL_ACTIVE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | info->normal_termios = *tty->termios; |
| 1187 | /* |
| 1188 | * Now we wait for the transmit buffer to clear; and we notify |
| 1189 | * the line discipline to only process XON/XOFF characters. |
| 1190 | */ |
| 1191 | tty->closing = 1; |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 1192 | if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1193 | tty_wait_until_sent(tty, info->port.closing_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | /* |
| 1195 | * At this point we stop accepting input. To do this, we |
| 1196 | * disable the receive line status interrupts, and tell the |
| 1197 | * interrupt driver to stop checking the data ready bit in the |
| 1198 | * line status register. |
| 1199 | */ |
| 1200 | info->IER &= ~UART_IER_RLSI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1201 | if (info->board->chip_flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | info->IER &= ~MOXA_MUST_RECV_ISR; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1203 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1204 | if (info->port.flags & ASYNC_INITIALIZED) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1205 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | /* |
| 1207 | * Before we drop DTR, make sure the UART transmitter |
| 1208 | * has completely drained; this is especially |
| 1209 | * important if there is a transmit FIFO! |
| 1210 | */ |
| 1211 | timeout = jiffies + HZ; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1212 | while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { |
Nishanth Aravamudan | da4cd8d | 2005-09-10 00:27:30 -0700 | [diff] [blame] | 1213 | schedule_timeout_interruptible(5); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | if (time_after(jiffies, timeout)) |
| 1215 | break; |
| 1216 | } |
| 1217 | } |
| 1218 | mxser_shutdown(info); |
| 1219 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 1220 | mxser_flush_buffer(tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1221 | tty_ldisc_flush(tty); |
| 1222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | tty->closing = 0; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1224 | info->port.tty = NULL; |
| 1225 | if (info->port.blocked_open) { |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 1226 | if (info->port.close_delay) |
| 1227 | schedule_timeout_interruptible(info->port.close_delay); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1228 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | } |
| 1230 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1231 | info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 1235 | { |
| 1236 | int c, total = 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1237 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | unsigned long flags; |
| 1239 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1240 | if (!info->port.xmit_buf) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1241 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
| 1243 | while (1) { |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1244 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
| 1245 | SERIAL_XMIT_SIZE - info->xmit_head)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | if (c <= 0) |
| 1247 | break; |
| 1248 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1249 | memcpy(info->port.xmit_buf + info->xmit_head, buf, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | spin_lock_irqsave(&info->slock, flags); |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1251 | info->xmit_head = (info->xmit_head + c) & |
| 1252 | (SERIAL_XMIT_SIZE - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | info->xmit_cnt += c; |
| 1254 | spin_unlock_irqrestore(&info->slock, flags); |
| 1255 | |
| 1256 | buf += c; |
| 1257 | count -= c; |
| 1258 | total += c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | } |
| 1260 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1261 | if (info->xmit_cnt && !tty->stopped) { |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1262 | if (!tty->hw_stopped || |
| 1263 | (info->type == PORT_16550A) || |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1264 | (info->board->chip_flag)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | spin_lock_irqsave(&info->slock, flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1266 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + |
| 1267 | UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | info->IER |= UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1269 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | spin_unlock_irqrestore(&info->slock, flags); |
| 1271 | } |
| 1272 | } |
| 1273 | return total; |
| 1274 | } |
| 1275 | |
Alan Cox | 0be2ead | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1276 | static int mxser_put_char(struct tty_struct *tty, unsigned char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1278 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | unsigned long flags; |
| 1280 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1281 | if (!info->port.xmit_buf) |
Alan Cox | 0be2ead | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1282 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
| 1284 | if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
Alan Cox | 0be2ead | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1285 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | |
| 1287 | spin_lock_irqsave(&info->slock, flags); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1288 | info->port.xmit_buf[info->xmit_head++] = ch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; |
| 1290 | info->xmit_cnt++; |
| 1291 | spin_unlock_irqrestore(&info->slock, flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1292 | if (!tty->stopped) { |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1293 | if (!tty->hw_stopped || |
| 1294 | (info->type == PORT_16550A) || |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1295 | info->board->chip_flag) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | spin_lock_irqsave(&info->slock, flags); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1297 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | info->IER |= UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1299 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | spin_unlock_irqrestore(&info->slock, flags); |
| 1301 | } |
| 1302 | } |
Alan Cox | 0be2ead | 2008-04-30 00:54:03 -0700 | [diff] [blame] | 1303 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | |
| 1307 | static void mxser_flush_chars(struct tty_struct *tty) |
| 1308 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1309 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | unsigned long flags; |
| 1311 | |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1312 | if (info->xmit_cnt <= 0 || |
| 1313 | tty->stopped || |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1314 | !info->port.xmit_buf || |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1315 | (tty->hw_stopped && |
| 1316 | (info->type != PORT_16550A) && |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1317 | (!info->board->chip_flag) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1318 | )) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | return; |
| 1320 | |
| 1321 | spin_lock_irqsave(&info->slock, flags); |
| 1322 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1323 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | info->IER |= UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1325 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | |
| 1327 | spin_unlock_irqrestore(&info->slock, flags); |
| 1328 | } |
| 1329 | |
| 1330 | static int mxser_write_room(struct tty_struct *tty) |
| 1331 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1332 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | int ret; |
| 1334 | |
| 1335 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; |
| 1336 | if (ret < 0) |
| 1337 | ret = 0; |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1338 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
| 1341 | static int mxser_chars_in_buffer(struct tty_struct *tty) |
| 1342 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1343 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | return info->xmit_cnt; |
| 1345 | } |
| 1346 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1347 | /* |
| 1348 | * ------------------------------------------------------------ |
| 1349 | * friends of mxser_ioctl() |
| 1350 | * ------------------------------------------------------------ |
| 1351 | */ |
| 1352 | static int mxser_get_serial_info(struct mxser_port *info, |
| 1353 | struct serial_struct __user *retinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1355 | struct serial_struct tmp = { |
| 1356 | .type = info->type, |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1357 | .line = info->port.tty->index, |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1358 | .port = info->ioaddr, |
| 1359 | .irq = info->board->irq, |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1360 | .flags = info->port.flags, |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1361 | .baud_base = info->baud_base, |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 1362 | .close_delay = info->port.close_delay, |
| 1363 | .closing_wait = info->port.closing_wait, |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1364 | .custom_divisor = info->custom_divisor, |
| 1365 | .hub6 = 0 |
| 1366 | }; |
| 1367 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| 1368 | return -EFAULT; |
| 1369 | return 0; |
| 1370 | } |
| 1371 | |
| 1372 | static int mxser_set_serial_info(struct mxser_port *info, |
| 1373 | struct serial_struct __user *new_info) |
| 1374 | { |
| 1375 | struct serial_struct new_serial; |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 1376 | speed_t baud; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1377 | unsigned long sl_flags; |
| 1378 | unsigned int flags; |
| 1379 | int retval = 0; |
| 1380 | |
| 1381 | if (!new_info || !info->ioaddr) |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 1382 | return -ENODEV; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1383 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
| 1384 | return -EFAULT; |
| 1385 | |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 1386 | if (new_serial.irq != info->board->irq || |
| 1387 | new_serial.port != info->ioaddr) |
| 1388 | return -EINVAL; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1389 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1390 | flags = info->port.flags & ASYNC_SPD_MASK; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1391 | |
| 1392 | if (!capable(CAP_SYS_ADMIN)) { |
| 1393 | if ((new_serial.baud_base != info->baud_base) || |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 1394 | (new_serial.close_delay != info->port.close_delay) || |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1395 | ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1396 | return -EPERM; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1397 | info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1398 | (new_serial.flags & ASYNC_USR_MASK)); |
| 1399 | } else { |
| 1400 | /* |
| 1401 | * OK, past this point, all the error checking has been done. |
| 1402 | * At this point, we start making changes..... |
| 1403 | */ |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1404 | info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1405 | (new_serial.flags & ASYNC_FLAGS)); |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 1406 | info->port.close_delay = new_serial.close_delay * HZ / 100; |
| 1407 | info->port.closing_wait = new_serial.closing_wait * HZ / 100; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1408 | info->port.tty->low_latency = |
| 1409 | (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1410 | if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 1411 | (new_serial.baud_base != info->baud_base || |
| 1412 | new_serial.custom_divisor != |
| 1413 | info->custom_divisor)) { |
| 1414 | baud = new_serial.baud_base / new_serial.custom_divisor; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1415 | tty_encode_baud_rate(info->port.tty, baud, baud); |
Jiri Slaby | 80ff8a8 | 2008-02-07 00:16:51 -0800 | [diff] [blame] | 1416 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1417 | } |
| 1418 | |
| 1419 | info->type = new_serial.type; |
| 1420 | |
| 1421 | process_txrx_fifo(info); |
| 1422 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1423 | if (info->port.flags & ASYNC_INITIALIZED) { |
| 1424 | if (flags != (info->port.flags & ASYNC_SPD_MASK)) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1425 | spin_lock_irqsave(&info->slock, sl_flags); |
| 1426 | mxser_change_speed(info, NULL); |
| 1427 | spin_unlock_irqrestore(&info->slock, sl_flags); |
| 1428 | } |
| 1429 | } else |
| 1430 | retval = mxser_startup(info); |
| 1431 | |
| 1432 | return retval; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * mxser_get_lsr_info - get line status register info |
| 1437 | * |
| 1438 | * Purpose: Let user call ioctl() to get info when the UART physically |
| 1439 | * is emptied. On bus types like RS485, the transmitter must |
| 1440 | * release the bus after transmitting. This must be done when |
| 1441 | * the transmit shift register is empty, not be done when the |
| 1442 | * transmit holding register is empty. This functionality |
| 1443 | * allows an RS485 driver to be written in user space. |
| 1444 | */ |
| 1445 | static int mxser_get_lsr_info(struct mxser_port *info, |
| 1446 | unsigned int __user *value) |
| 1447 | { |
| 1448 | unsigned char status; |
| 1449 | unsigned int result; |
| 1450 | unsigned long flags; |
| 1451 | |
| 1452 | spin_lock_irqsave(&info->slock, flags); |
| 1453 | status = inb(info->ioaddr + UART_LSR); |
| 1454 | spin_unlock_irqrestore(&info->slock, flags); |
| 1455 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); |
| 1456 | return put_user(result, value); |
| 1457 | } |
| 1458 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1459 | static int mxser_tiocmget(struct tty_struct *tty, struct file *file) |
| 1460 | { |
| 1461 | struct mxser_port *info = tty->driver_data; |
| 1462 | unsigned char control, status; |
| 1463 | unsigned long flags; |
| 1464 | |
| 1465 | |
| 1466 | if (tty->index == MXSER_PORTS) |
| 1467 | return -ENOIOCTLCMD; |
| 1468 | if (test_bit(TTY_IO_ERROR, &tty->flags)) |
| 1469 | return -EIO; |
| 1470 | |
| 1471 | control = info->MCR; |
| 1472 | |
| 1473 | spin_lock_irqsave(&info->slock, flags); |
| 1474 | status = inb(info->ioaddr + UART_MSR); |
| 1475 | if (status & UART_MSR_ANY_DELTA) |
| 1476 | mxser_check_modem_status(info, status); |
| 1477 | spin_unlock_irqrestore(&info->slock, flags); |
| 1478 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | |
| 1479 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | |
| 1480 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | |
| 1481 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | |
| 1482 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | |
| 1483 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); |
| 1484 | } |
| 1485 | |
| 1486 | static int mxser_tiocmset(struct tty_struct *tty, struct file *file, |
| 1487 | unsigned int set, unsigned int clear) |
| 1488 | { |
| 1489 | struct mxser_port *info = tty->driver_data; |
| 1490 | unsigned long flags; |
| 1491 | |
| 1492 | |
| 1493 | if (tty->index == MXSER_PORTS) |
| 1494 | return -ENOIOCTLCMD; |
| 1495 | if (test_bit(TTY_IO_ERROR, &tty->flags)) |
| 1496 | return -EIO; |
| 1497 | |
| 1498 | spin_lock_irqsave(&info->slock, flags); |
| 1499 | |
| 1500 | if (set & TIOCM_RTS) |
| 1501 | info->MCR |= UART_MCR_RTS; |
| 1502 | if (set & TIOCM_DTR) |
| 1503 | info->MCR |= UART_MCR_DTR; |
| 1504 | |
| 1505 | if (clear & TIOCM_RTS) |
| 1506 | info->MCR &= ~UART_MCR_RTS; |
| 1507 | if (clear & TIOCM_DTR) |
| 1508 | info->MCR &= ~UART_MCR_DTR; |
| 1509 | |
| 1510 | outb(info->MCR, info->ioaddr + UART_MCR); |
| 1511 | spin_unlock_irqrestore(&info->slock, flags); |
| 1512 | return 0; |
| 1513 | } |
| 1514 | |
| 1515 | static int __init mxser_program_mode(int port) |
| 1516 | { |
| 1517 | int id, i, j, n; |
| 1518 | |
| 1519 | outb(0, port); |
| 1520 | outb(0, port); |
| 1521 | outb(0, port); |
| 1522 | (void)inb(port); |
| 1523 | (void)inb(port); |
| 1524 | outb(0, port); |
| 1525 | (void)inb(port); |
| 1526 | |
| 1527 | id = inb(port + 1) & 0x1F; |
| 1528 | if ((id != C168_ASIC_ID) && |
| 1529 | (id != C104_ASIC_ID) && |
| 1530 | (id != C102_ASIC_ID) && |
| 1531 | (id != CI132_ASIC_ID) && |
| 1532 | (id != CI134_ASIC_ID) && |
| 1533 | (id != CI104J_ASIC_ID)) |
| 1534 | return -1; |
| 1535 | for (i = 0, j = 0; i < 4; i++) { |
| 1536 | n = inb(port + 2); |
| 1537 | if (n == 'M') { |
| 1538 | j = 1; |
| 1539 | } else if ((j == 1) && (n == 1)) { |
| 1540 | j = 2; |
| 1541 | break; |
| 1542 | } else |
| 1543 | j = 0; |
| 1544 | } |
| 1545 | if (j != 2) |
| 1546 | id = -2; |
| 1547 | return id; |
| 1548 | } |
| 1549 | |
| 1550 | static void __init mxser_normal_mode(int port) |
| 1551 | { |
| 1552 | int i, n; |
| 1553 | |
| 1554 | outb(0xA5, port + 1); |
| 1555 | outb(0x80, port + 3); |
| 1556 | outb(12, port + 0); /* 9600 bps */ |
| 1557 | outb(0, port + 1); |
| 1558 | outb(0x03, port + 3); /* 8 data bits */ |
| 1559 | outb(0x13, port + 4); /* loop back mode */ |
| 1560 | for (i = 0; i < 16; i++) { |
| 1561 | n = inb(port + 5); |
| 1562 | if ((n & 0x61) == 0x60) |
| 1563 | break; |
| 1564 | if ((n & 1) == 1) |
| 1565 | (void)inb(port); |
| 1566 | } |
| 1567 | outb(0x00, port + 4); |
| 1568 | } |
| 1569 | |
| 1570 | #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ |
| 1571 | #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ |
| 1572 | #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ |
| 1573 | #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ |
| 1574 | #define EN_CCMD 0x000 /* Chip's command register */ |
| 1575 | #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ |
| 1576 | #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ |
| 1577 | #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ |
| 1578 | #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ |
| 1579 | #define EN0_DCFG 0x00E /* Data configuration reg WR */ |
| 1580 | #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ |
| 1581 | #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ |
| 1582 | #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ |
| 1583 | static int __init mxser_read_register(int port, unsigned short *regs) |
| 1584 | { |
| 1585 | int i, k, value, id; |
| 1586 | unsigned int j; |
| 1587 | |
| 1588 | id = mxser_program_mode(port); |
| 1589 | if (id < 0) |
| 1590 | return id; |
| 1591 | for (i = 0; i < 14; i++) { |
| 1592 | k = (i & 0x3F) | 0x180; |
| 1593 | for (j = 0x100; j > 0; j >>= 1) { |
| 1594 | outb(CHIP_CS, port); |
| 1595 | if (k & j) { |
| 1596 | outb(CHIP_CS | CHIP_DO, port); |
| 1597 | outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ |
| 1598 | } else { |
| 1599 | outb(CHIP_CS, port); |
| 1600 | outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ |
| 1601 | } |
| 1602 | } |
| 1603 | (void)inb(port); |
| 1604 | value = 0; |
| 1605 | for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { |
| 1606 | outb(CHIP_CS, port); |
| 1607 | outb(CHIP_CS | CHIP_SK, port); |
| 1608 | if (inb(port) & CHIP_DI) |
| 1609 | value |= j; |
| 1610 | } |
| 1611 | regs[i] = value; |
| 1612 | outb(0, port); |
| 1613 | } |
| 1614 | mxser_normal_mode(port); |
| 1615 | return id; |
| 1616 | } |
| 1617 | |
| 1618 | static int mxser_ioctl_special(unsigned int cmd, void __user *argp) |
| 1619 | { |
| 1620 | struct mxser_port *port; |
| 1621 | int result, status; |
| 1622 | unsigned int i, j; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1623 | int ret = 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1624 | |
| 1625 | switch (cmd) { |
| 1626 | case MOXA_GET_MAJOR: |
Jiri Slaby | 41aee9a | 2008-07-25 01:48:19 -0700 | [diff] [blame] | 1627 | printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl %x, fix " |
| 1628 | "your userspace\n", current->comm, cmd); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1629 | return put_user(ttymajor, (int __user *)argp); |
| 1630 | |
| 1631 | case MOXA_CHKPORTENABLE: |
| 1632 | result = 0; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1633 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1634 | for (i = 0; i < MXSER_BOARDS; i++) |
| 1635 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) |
| 1636 | if (mxser_boards[i].ports[j].ioaddr) |
| 1637 | result |= (1 << i); |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1638 | unlock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1639 | return put_user(result, (unsigned long __user *)argp); |
| 1640 | case MOXA_GETDATACOUNT: |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1641 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1642 | if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1643 | ret = -EFAULT; |
| 1644 | unlock_kernel(); |
| 1645 | return ret; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1646 | case MOXA_GETMSTATUS: { |
| 1647 | struct mxser_mstatus ms, __user *msu = argp; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1648 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1649 | for (i = 0; i < MXSER_BOARDS; i++) |
| 1650 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { |
| 1651 | port = &mxser_boards[i].ports[j]; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1652 | memset(&ms, 0, sizeof(ms)); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1653 | |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1654 | if (!port->ioaddr) |
| 1655 | goto copy; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1656 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1657 | if (!port->port.tty || !port->port.tty->termios) |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1658 | ms.cflag = port->normal_termios.c_cflag; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1659 | else |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1660 | ms.cflag = port->port.tty->termios->c_cflag; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1661 | |
| 1662 | status = inb(port->ioaddr + UART_MSR); |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1663 | if (status & UART_MSR_DCD) |
| 1664 | ms.dcd = 1; |
| 1665 | if (status & UART_MSR_DSR) |
| 1666 | ms.dsr = 1; |
| 1667 | if (status & UART_MSR_CTS) |
| 1668 | ms.cts = 1; |
| 1669 | copy: |
| 1670 | if (copy_to_user(msu, &ms, sizeof(ms))) { |
| 1671 | unlock_kernel(); |
| 1672 | return -EFAULT; |
| 1673 | } |
| 1674 | msu++; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1675 | } |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1676 | unlock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1677 | return 0; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1678 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1679 | case MOXA_ASPP_MON_EXT: { |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1680 | struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ |
| 1681 | unsigned int cflag, iflag, p; |
| 1682 | u8 opmode; |
| 1683 | |
| 1684 | me = kzalloc(sizeof(*me), GFP_KERNEL); |
| 1685 | if (!me) |
| 1686 | return -ENOMEM; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1687 | |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1688 | lock_kernel(); |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1689 | for (i = 0, p = 0; i < MXSER_BOARDS; i++) { |
| 1690 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { |
| 1691 | if (p >= ARRAY_SIZE(me->rx_cnt)) { |
| 1692 | i = MXSER_BOARDS; |
| 1693 | break; |
| 1694 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1695 | port = &mxser_boards[i].ports[j]; |
| 1696 | if (!port->ioaddr) |
| 1697 | continue; |
| 1698 | |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1699 | status = mxser_get_msr(port->ioaddr, 0, p); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1700 | |
| 1701 | if (status & UART_MSR_TERI) |
| 1702 | port->icount.rng++; |
| 1703 | if (status & UART_MSR_DDSR) |
| 1704 | port->icount.dsr++; |
| 1705 | if (status & UART_MSR_DDCD) |
| 1706 | port->icount.dcd++; |
| 1707 | if (status & UART_MSR_DCTS) |
| 1708 | port->icount.cts++; |
| 1709 | |
| 1710 | port->mon_data.modem_status = status; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1711 | me->rx_cnt[p] = port->mon_data.rxcnt; |
| 1712 | me->tx_cnt[p] = port->mon_data.txcnt; |
| 1713 | me->up_rxcnt[p] = port->mon_data.up_rxcnt; |
| 1714 | me->up_txcnt[p] = port->mon_data.up_txcnt; |
| 1715 | me->modem_status[p] = |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1716 | port->mon_data.modem_status; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1717 | me->baudrate[p] = tty_get_baud_rate(port->port.tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1718 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1719 | if (!port->port.tty || !port->port.tty->termios) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1720 | cflag = port->normal_termios.c_cflag; |
| 1721 | iflag = port->normal_termios.c_iflag; |
| 1722 | } else { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1723 | cflag = port->port.tty->termios->c_cflag; |
| 1724 | iflag = port->port.tty->termios->c_iflag; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1725 | } |
| 1726 | |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1727 | me->databits[p] = cflag & CSIZE; |
| 1728 | me->stopbits[p] = cflag & CSTOPB; |
| 1729 | me->parity[p] = cflag & (PARENB | PARODD | |
| 1730 | CMSPAR); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1731 | |
| 1732 | if (cflag & CRTSCTS) |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1733 | me->flowctrl[p] |= 0x03; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1734 | |
| 1735 | if (iflag & (IXON | IXOFF)) |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1736 | me->flowctrl[p] |= 0x0C; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1737 | |
| 1738 | if (port->type == PORT_16550A) |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1739 | me->fifo[p] = 1; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1740 | |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1741 | opmode = inb(port->opmode_ioaddr) >> |
| 1742 | ((p % 4) * 2); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1743 | opmode &= OP_MODE_MASK; |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1744 | me->iftype[p] = opmode; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1745 | } |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1746 | } |
| 1747 | unlock_kernel(); |
Jiri Slaby | 72800df | 2008-07-25 01:48:20 -0700 | [diff] [blame] | 1748 | if (copy_to_user(argp, me, sizeof(*me))) |
| 1749 | ret = -EFAULT; |
| 1750 | kfree(me); |
| 1751 | return ret; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1752 | } |
| 1753 | default: |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1754 | return -ENOIOCTLCMD; |
| 1755 | } |
| 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, |
| 1760 | struct async_icount *cprev) |
| 1761 | { |
| 1762 | struct async_icount cnow; |
| 1763 | unsigned long flags; |
| 1764 | int ret; |
| 1765 | |
| 1766 | spin_lock_irqsave(&info->slock, flags); |
| 1767 | cnow = info->icount; /* atomic copy */ |
| 1768 | spin_unlock_irqrestore(&info->slock, flags); |
| 1769 | |
| 1770 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
| 1771 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || |
| 1772 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || |
| 1773 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); |
| 1774 | |
| 1775 | *cprev = cnow; |
| 1776 | |
| 1777 | return ret; |
| 1778 | } |
| 1779 | |
| 1780 | static int mxser_ioctl(struct tty_struct *tty, struct file *file, |
| 1781 | unsigned int cmd, unsigned long arg) |
| 1782 | { |
| 1783 | struct mxser_port *info = tty->driver_data; |
| 1784 | struct async_icount cnow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | unsigned long flags; |
| 1786 | void __user *argp = (void __user *)arg; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1787 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | |
| 1789 | if (tty->index == MXSER_PORTS) |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1790 | return mxser_ioctl_special(cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1793 | int p; |
| 1794 | unsigned long opmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; |
| 1796 | int shiftbit; |
| 1797 | unsigned char val, mask; |
| 1798 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1799 | p = tty->index % 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | if (cmd == MOXA_SET_OP_MODE) { |
| 1801 | if (get_user(opmode, (int __user *) argp)) |
| 1802 | return -EFAULT; |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1803 | if (opmode != RS232_MODE && |
| 1804 | opmode != RS485_2WIRE_MODE && |
| 1805 | opmode != RS422_MODE && |
| 1806 | opmode != RS485_4WIRE_MODE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | return -EFAULT; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1808 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | mask = ModeMask[p]; |
| 1810 | shiftbit = p * 2; |
| 1811 | val = inb(info->opmode_ioaddr); |
| 1812 | val &= mask; |
| 1813 | val |= (opmode << shiftbit); |
| 1814 | outb(val, info->opmode_ioaddr); |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1815 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | } else { |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1817 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | shiftbit = p * 2; |
| 1819 | opmode = inb(info->opmode_ioaddr) >> shiftbit; |
| 1820 | opmode &= OP_MODE_MASK; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1821 | unlock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1822 | if (put_user(opmode, (int __user *)argp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | return -EFAULT; |
| 1824 | } |
| 1825 | return 0; |
| 1826 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1828 | if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && |
| 1829 | test_bit(TTY_IO_ERROR, &tty->flags)) |
| 1830 | return -EIO; |
| 1831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | case TIOCGSERIAL: |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1834 | lock_kernel(); |
| 1835 | retval = mxser_get_serial_info(info, argp); |
| 1836 | unlock_kernel(); |
| 1837 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | case TIOCSSERIAL: |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1839 | lock_kernel(); |
| 1840 | retval = mxser_set_serial_info(info, argp); |
| 1841 | unlock_kernel(); |
| 1842 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | case TIOCSERGETLSR: /* Get line status register */ |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1844 | return mxser_get_lsr_info(info, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | /* |
| 1846 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
| 1847 | * - mask passed in arg for lines of interest |
| 1848 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
| 1849 | * Caller should use TIOCGICOUNT to see which one it was |
| 1850 | */ |
Jiri Slaby | fc83815 | 2007-04-23 14:41:04 -0700 | [diff] [blame] | 1851 | case TIOCMIWAIT: |
| 1852 | spin_lock_irqsave(&info->slock, flags); |
| 1853 | cnow = info->icount; /* note the counters on entry */ |
| 1854 | spin_unlock_irqrestore(&info->slock, flags); |
| 1855 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1856 | return wait_event_interruptible(info->delta_msr_wait, |
| 1857 | mxser_cflags_changed(info, arg, &cnow)); |
| 1858 | /* |
| 1859 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| 1860 | * Return: write counters to the user passed counter struct |
| 1861 | * NB: both 1->0 and 0->1 transitions are counted except for |
| 1862 | * RI where only 0->1 is counted. |
| 1863 | */ |
Jiri Slaby | 41aee9a | 2008-07-25 01:48:19 -0700 | [diff] [blame] | 1864 | case TIOCGICOUNT: { |
| 1865 | struct serial_icounter_struct icnt = { 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | spin_lock_irqsave(&info->slock, flags); |
| 1867 | cnow = info->icount; |
| 1868 | spin_unlock_irqrestore(&info->slock, flags); |
Jiri Slaby | 41aee9a | 2008-07-25 01:48:19 -0700 | [diff] [blame] | 1869 | |
| 1870 | icnt.frame = cnow.frame; |
| 1871 | icnt.brk = cnow.brk; |
| 1872 | icnt.overrun = cnow.overrun; |
| 1873 | icnt.buf_overrun = cnow.buf_overrun; |
| 1874 | icnt.parity = cnow.parity; |
| 1875 | icnt.rx = cnow.rx; |
| 1876 | icnt.tx = cnow.tx; |
| 1877 | icnt.cts = cnow.cts; |
| 1878 | icnt.dsr = cnow.dsr; |
| 1879 | icnt.rng = cnow.rng; |
| 1880 | icnt.dcd = cnow.dcd; |
| 1881 | |
| 1882 | return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0; |
| 1883 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | case MOXA_HighSpeedOn: |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1885 | return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1886 | case MOXA_SDS_RSTICOUNTER: |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1887 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1888 | info->mon_data.rxcnt = 0; |
| 1889 | info->mon_data.txcnt = 0; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1890 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | return 0; |
| 1892 | |
| 1893 | case MOXA_ASPP_OQUEUE:{ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1894 | int len, lsr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1896 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1897 | len = mxser_chars_in_buffer(tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1898 | lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1899 | len += (lsr ? 0 : 1); |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1900 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1902 | return put_user(len, (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1904 | case MOXA_ASPP_MON: { |
| 1905 | int mcr, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1907 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1908 | status = mxser_get_msr(info->ioaddr, 1, tty->index); |
| 1909 | mxser_check_modem_status(info, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1911 | mcr = inb(info->ioaddr + UART_MCR); |
| 1912 | if (mcr & MOXA_MUST_MCR_XON_FLAG) |
| 1913 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; |
| 1914 | else |
| 1915 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1917 | if (mcr & MOXA_MUST_MCR_TX_XON) |
| 1918 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; |
| 1919 | else |
| 1920 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; |
| 1921 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1922 | if (info->port.tty->hw_stopped) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1923 | info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; |
| 1924 | else |
| 1925 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; |
Alan Cox | 9d6d162 | 2008-04-30 00:53:20 -0700 | [diff] [blame] | 1926 | unlock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1927 | if (copy_to_user(argp, &info->mon_data, |
| 1928 | sizeof(struct mxser_mon))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | return -EFAULT; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1930 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | return 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1932 | } |
| 1933 | case MOXA_ASPP_LSTATUS: { |
| 1934 | if (put_user(info->err_shadow, (unsigned char __user *)argp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1937 | info->err_shadow = 0; |
| 1938 | return 0; |
| 1939 | } |
| 1940 | case MOXA_SET_BAUD_METHOD: { |
| 1941 | int method; |
| 1942 | |
| 1943 | if (get_user(method, (int __user *)argp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | return -EFAULT; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1945 | mxser_set_baud_method[tty->index] = method; |
| 1946 | return put_user(method, (int __user *)argp); |
| 1947 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | default: |
| 1949 | return -ENOIOCTLCMD; |
| 1950 | } |
| 1951 | return 0; |
| 1952 | } |
| 1953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | static void mxser_stoprx(struct tty_struct *tty) |
| 1955 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1956 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | |
| 1958 | info->ldisc_stop_rx = 1; |
| 1959 | if (I_IXOFF(tty)) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1960 | if (info->board->chip_flag) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | info->IER &= ~MOXA_MUST_RECV_ISR; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1962 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | info->x_char = STOP_CHAR(tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1965 | outb(0, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | info->IER |= UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1967 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | } |
| 1969 | } |
| 1970 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 1971 | if (info->port.tty->termios->c_cflag & CRTSCTS) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1972 | info->MCR &= ~UART_MCR_RTS; |
| 1973 | outb(info->MCR, info->ioaddr + UART_MCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | /* |
| 1978 | * This routine is called by the upper-layer tty layer to signal that |
| 1979 | * incoming characters should be throttled. |
| 1980 | */ |
| 1981 | static void mxser_throttle(struct tty_struct *tty) |
| 1982 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | mxser_stoprx(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | } |
| 1985 | |
| 1986 | static void mxser_unthrottle(struct tty_struct *tty) |
| 1987 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1988 | struct mxser_port *info = tty->driver_data; |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 1989 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 1990 | /* startrx */ |
| 1991 | info->ldisc_stop_rx = 0; |
| 1992 | if (I_IXOFF(tty)) { |
| 1993 | if (info->x_char) |
| 1994 | info->x_char = 0; |
| 1995 | else { |
| 1996 | if (info->board->chip_flag) { |
| 1997 | info->IER |= MOXA_MUST_RECV_ISR; |
| 1998 | outb(info->IER, info->ioaddr + UART_IER); |
| 1999 | } else { |
| 2000 | info->x_char = START_CHAR(tty); |
| 2001 | outb(0, info->ioaddr + UART_IER); |
| 2002 | info->IER |= UART_IER_THRI; |
| 2003 | outb(info->IER, info->ioaddr + UART_IER); |
| 2004 | } |
| 2005 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | } |
| 2007 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2008 | if (info->port.tty->termios->c_cflag & CRTSCTS) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2009 | info->MCR |= UART_MCR_RTS; |
| 2010 | outb(info->MCR, info->ioaddr + UART_MCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | } |
| 2012 | } |
| 2013 | |
| 2014 | /* |
| 2015 | * mxser_stop() and mxser_start() |
| 2016 | * |
| 2017 | * This routines are called before setting or resetting tty->stopped. |
| 2018 | * They enable or disable transmitter interrupts, as necessary. |
| 2019 | */ |
| 2020 | static void mxser_stop(struct tty_struct *tty) |
| 2021 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2022 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | unsigned long flags; |
| 2024 | |
| 2025 | spin_lock_irqsave(&info->slock, flags); |
| 2026 | if (info->IER & UART_IER_THRI) { |
| 2027 | info->IER &= ~UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2028 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | } |
| 2030 | spin_unlock_irqrestore(&info->slock, flags); |
| 2031 | } |
| 2032 | |
| 2033 | static void mxser_start(struct tty_struct *tty) |
| 2034 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2035 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | unsigned long flags; |
| 2037 | |
| 2038 | spin_lock_irqsave(&info->slock, flags); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2039 | if (info->xmit_cnt && info->port.xmit_buf) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2040 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | info->IER |= UART_IER_THRI; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2042 | outb(info->IER, info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | } |
| 2044 | spin_unlock_irqrestore(&info->slock, flags); |
| 2045 | } |
| 2046 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2047 | static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| 2048 | { |
| 2049 | struct mxser_port *info = tty->driver_data; |
| 2050 | unsigned long flags; |
| 2051 | |
| 2052 | spin_lock_irqsave(&info->slock, flags); |
| 2053 | mxser_change_speed(info, old_termios); |
| 2054 | spin_unlock_irqrestore(&info->slock, flags); |
| 2055 | |
| 2056 | if ((old_termios->c_cflag & CRTSCTS) && |
| 2057 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 2058 | tty->hw_stopped = 0; |
| 2059 | mxser_start(tty); |
| 2060 | } |
| 2061 | |
| 2062 | /* Handle sw stopped */ |
| 2063 | if ((old_termios->c_iflag & IXON) && |
| 2064 | !(tty->termios->c_iflag & IXON)) { |
| 2065 | tty->stopped = 0; |
| 2066 | |
| 2067 | if (info->board->chip_flag) { |
| 2068 | spin_lock_irqsave(&info->slock, flags); |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 2069 | mxser_disable_must_rx_software_flow_control( |
| 2070 | info->ioaddr); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2071 | spin_unlock_irqrestore(&info->slock, flags); |
| 2072 | } |
| 2073 | |
| 2074 | mxser_start(tty); |
| 2075 | } |
| 2076 | } |
| 2077 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | /* |
| 2079 | * mxser_wait_until_sent() --- wait until the transmitter is empty |
| 2080 | */ |
| 2081 | static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) |
| 2082 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2083 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | unsigned long orig_jiffies, char_time; |
| 2085 | int lsr; |
| 2086 | |
| 2087 | if (info->type == PORT_UNKNOWN) |
| 2088 | return; |
| 2089 | |
| 2090 | if (info->xmit_fifo_size == 0) |
| 2091 | return; /* Just in case.... */ |
| 2092 | |
| 2093 | orig_jiffies = jiffies; |
| 2094 | /* |
| 2095 | * Set the check interval to be 1/5 of the estimated time to |
| 2096 | * send a single character, and make it at least 1. The check |
| 2097 | * interval should also be less than the timeout. |
| 2098 | * |
| 2099 | * Note: we have to use pretty tight timings here to satisfy |
| 2100 | * the NIST-PCTS. |
| 2101 | */ |
| 2102 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; |
| 2103 | char_time = char_time / 5; |
| 2104 | if (char_time == 0) |
| 2105 | char_time = 1; |
| 2106 | if (timeout && timeout < char_time) |
| 2107 | char_time = timeout; |
| 2108 | /* |
| 2109 | * If the transmitter hasn't cleared in twice the approximate |
| 2110 | * amount of time to send the entire FIFO, it probably won't |
| 2111 | * ever clear. This assumes the UART isn't doing flow |
| 2112 | * control, which is currently the case. Hence, if it ever |
| 2113 | * takes longer than info->timeout, this is probably due to a |
| 2114 | * UART bug of some kind. So, we clamp the timeout parameter at |
| 2115 | * 2*info->timeout. |
| 2116 | */ |
| 2117 | if (!timeout || timeout > 2 * info->timeout) |
| 2118 | timeout = 2 * info->timeout; |
| 2119 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 2120 | printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", |
| 2121 | timeout, char_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | printk("jiff=%lu...", jiffies); |
| 2123 | #endif |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2124 | lock_kernel(); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2125 | while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 2127 | printk("lsr = %d (jiff=%lu)...", lsr, jiffies); |
| 2128 | #endif |
Nishanth Aravamudan | da4cd8d | 2005-09-10 00:27:30 -0700 | [diff] [blame] | 2129 | schedule_timeout_interruptible(char_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | if (signal_pending(current)) |
| 2131 | break; |
| 2132 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 2133 | break; |
| 2134 | } |
| 2135 | set_current_state(TASK_RUNNING); |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 2136 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | |
| 2138 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 2139 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); |
| 2140 | #endif |
| 2141 | } |
| 2142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | /* |
| 2144 | * This routine is called by tty_hangup() when a hangup is signaled. |
| 2145 | */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2146 | static void mxser_hangup(struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2148 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | |
| 2150 | mxser_flush_buffer(tty); |
| 2151 | mxser_shutdown(info); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2152 | info->port.count = 0; |
| 2153 | info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| 2154 | info->port.tty = NULL; |
| 2155 | wake_up_interruptible(&info->port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | } |
| 2157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | /* |
| 2159 | * mxser_rs_break() --- routine which turns the break handling on or off |
| 2160 | */ |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2161 | static int mxser_rs_break(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2163 | struct mxser_port *info = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | unsigned long flags; |
| 2165 | |
| 2166 | spin_lock_irqsave(&info->slock, flags); |
| 2167 | if (break_state == -1) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2168 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, |
| 2169 | info->ioaddr + UART_LCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | else |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2171 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, |
| 2172 | info->ioaddr + UART_LCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | spin_unlock_irqrestore(&info->slock, flags); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 2174 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | } |
| 2176 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2177 | static void mxser_receive_chars(struct mxser_port *port, int *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2179 | struct tty_struct *tty = port->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | unsigned char ch, gdl; |
| 2181 | int ignored = 0; |
| 2182 | int cnt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | int recv_room; |
| 2184 | int max = 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2186 | recv_room = tty->receive_room; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2187 | if ((recv_room == 0) && (!port->ldisc_stop_rx)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | mxser_stoprx(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2190 | if (port->board->chip_flag != MOXA_OTHER_UART) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2192 | if (*status & UART_LSR_SPECIAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | goto intr_old; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2194 | if (port->board->chip_flag == MOXA_MUST_MU860_HWID && |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 2195 | (*status & MOXA_MUST_LSR_RERR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | goto intr_old; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | if (*status & MOXA_MUST_LSR_RERR) |
| 2198 | goto intr_old; |
| 2199 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2200 | gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2202 | if (port->board->chip_flag == MOXA_MUST_MU150_HWID) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | gdl &= MOXA_MUST_GDL_MASK; |
| 2204 | if (gdl >= recv_room) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2205 | if (!port->ldisc_stop_rx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | mxser_stoprx(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | } |
| 2208 | while (gdl--) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2209 | ch = inb(port->ioaddr + UART_RX); |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2210 | tty_insert_flip_char(tty, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | cnt++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | } |
| 2213 | goto end_intr; |
| 2214 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2215 | intr_old: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | |
| 2217 | do { |
| 2218 | if (max-- < 0) |
| 2219 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2221 | ch = inb(port->ioaddr + UART_RX); |
| 2222 | if (port->board->chip_flag && (*status & UART_LSR_OE)) |
| 2223 | outb(0x23, port->ioaddr + UART_FCR); |
| 2224 | *status &= port->read_status_mask; |
| 2225 | if (*status & port->ignore_status_mask) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | if (++ignored > 100) |
| 2227 | break; |
| 2228 | } else { |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2229 | char flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | if (*status & UART_LSR_SPECIAL) { |
| 2231 | if (*status & UART_LSR_BI) { |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2232 | flag = TTY_BREAK; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2233 | port->icount.brk++; |
| 2234 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2235 | if (port->port.flags & ASYNC_SAK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | do_SAK(tty); |
| 2237 | } else if (*status & UART_LSR_PE) { |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2238 | flag = TTY_PARITY; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2239 | port->icount.parity++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | } else if (*status & UART_LSR_FE) { |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2241 | flag = TTY_FRAME; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2242 | port->icount.frame++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | } else if (*status & UART_LSR_OE) { |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2244 | flag = TTY_OVERRUN; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2245 | port->icount.overrun++; |
| 2246 | } else |
| 2247 | flag = TTY_BREAK; |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2248 | } |
| 2249 | tty_insert_flip_char(tty, ch, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | cnt++; |
| 2251 | if (cnt >= recv_room) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2252 | if (!port->ldisc_stop_rx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | mxser_stoprx(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | break; |
| 2255 | } |
| 2256 | |
| 2257 | } |
| 2258 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2259 | if (port->board->chip_flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2262 | *status = inb(port->ioaddr + UART_LSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | } while (*status & UART_LSR_DR); |
| 2264 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2265 | end_intr: |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2266 | mxvar_log.rxcnt[port->port.tty->index] += cnt; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2267 | port->mon_data.rxcnt += cnt; |
| 2268 | port->mon_data.up_rxcnt += cnt; |
Denis Vlasenko | 3399ba5 | 2005-06-06 13:35:55 -0700 | [diff] [blame] | 2269 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2270 | /* |
| 2271 | * We are called from an interrupt context with &port->slock |
| 2272 | * being held. Drop it temporarily in order to prevent |
| 2273 | * recursive locking. |
| 2274 | */ |
| 2275 | spin_unlock(&port->slock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | tty_flip_buffer_push(tty); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2277 | spin_lock(&port->slock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | } |
| 2279 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2280 | static void mxser_transmit_chars(struct mxser_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | { |
| 2282 | int count, cnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2284 | if (port->x_char) { |
| 2285 | outb(port->x_char, port->ioaddr + UART_TX); |
| 2286 | port->x_char = 0; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2287 | mxvar_log.txcnt[port->port.tty->index]++; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2288 | port->mon_data.txcnt++; |
| 2289 | port->mon_data.up_txcnt++; |
| 2290 | port->icount.tx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | return; |
| 2292 | } |
| 2293 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2294 | if (port->port.xmit_buf == NULL) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2295 | return; |
| 2296 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2297 | if ((port->xmit_cnt <= 0) || port->port.tty->stopped || |
| 2298 | (port->port.tty->hw_stopped && |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2299 | (port->type != PORT_16550A) && |
| 2300 | (!port->board->chip_flag))) { |
| 2301 | port->IER &= ~UART_IER_THRI; |
| 2302 | outb(port->IER, port->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | return; |
| 2304 | } |
| 2305 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2306 | cnt = port->xmit_cnt; |
| 2307 | count = port->xmit_fifo_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | do { |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2309 | outb(port->port.xmit_buf[port->xmit_tail++], |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2310 | port->ioaddr + UART_TX); |
| 2311 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); |
| 2312 | if (--port->xmit_cnt <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | break; |
| 2314 | } while (--count > 0); |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2315 | mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2317 | port->mon_data.txcnt += (cnt - port->xmit_cnt); |
| 2318 | port->mon_data.up_txcnt += (cnt - port->xmit_cnt); |
| 2319 | port->icount.tx += (cnt - port->xmit_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2321 | if (port->xmit_cnt < WAKEUP_CHARS) |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2322 | tty_wakeup(port->port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2324 | if (port->xmit_cnt <= 0) { |
| 2325 | port->IER &= ~UART_IER_THRI; |
| 2326 | outb(port->IER, port->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | } |
| 2329 | |
| 2330 | /* |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2331 | * This is the serial driver's generic interrupt routine |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2333 | static irqreturn_t mxser_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2335 | int status, iir, i; |
| 2336 | struct mxser_board *brd = NULL; |
| 2337 | struct mxser_port *port; |
| 2338 | int max, irqbits, bits, msr; |
| 2339 | unsigned int int_cnt, pass_counter = 0; |
| 2340 | int handled = IRQ_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2342 | for (i = 0; i < MXSER_BOARDS; i++) |
| 2343 | if (dev_id == &mxser_boards[i]) { |
| 2344 | brd = dev_id; |
| 2345 | break; |
| 2346 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2348 | if (i == MXSER_BOARDS) |
| 2349 | goto irq_stop; |
| 2350 | if (brd == NULL) |
| 2351 | goto irq_stop; |
| 2352 | max = brd->info->nports; |
| 2353 | while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { |
| 2354 | irqbits = inb(brd->vector) & brd->vector_mask; |
| 2355 | if (irqbits == brd->vector_mask) |
| 2356 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2358 | handled = IRQ_HANDLED; |
| 2359 | for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { |
| 2360 | if (irqbits == brd->vector_mask) |
| 2361 | break; |
| 2362 | if (bits & irqbits) |
| 2363 | continue; |
| 2364 | port = &brd->ports[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2366 | int_cnt = 0; |
| 2367 | spin_lock(&port->slock); |
| 2368 | do { |
| 2369 | iir = inb(port->ioaddr + UART_IIR); |
| 2370 | if (iir & UART_IIR_NO_INT) |
| 2371 | break; |
| 2372 | iir &= MOXA_MUST_IIR_MASK; |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2373 | if (!port->port.tty || |
| 2374 | (port->port.flags & ASYNC_CLOSING) || |
| 2375 | !(port->port.flags & |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2376 | ASYNC_INITIALIZED)) { |
| 2377 | status = inb(port->ioaddr + UART_LSR); |
| 2378 | outb(0x27, port->ioaddr + UART_FCR); |
| 2379 | inb(port->ioaddr + UART_MSR); |
| 2380 | break; |
| 2381 | } |
| 2382 | |
| 2383 | status = inb(port->ioaddr + UART_LSR); |
| 2384 | |
| 2385 | if (status & UART_LSR_PE) |
| 2386 | port->err_shadow |= NPPI_NOTIFY_PARITY; |
| 2387 | if (status & UART_LSR_FE) |
| 2388 | port->err_shadow |= NPPI_NOTIFY_FRAMING; |
| 2389 | if (status & UART_LSR_OE) |
| 2390 | port->err_shadow |= |
| 2391 | NPPI_NOTIFY_HW_OVERRUN; |
| 2392 | if (status & UART_LSR_BI) |
| 2393 | port->err_shadow |= NPPI_NOTIFY_BREAK; |
| 2394 | |
| 2395 | if (port->board->chip_flag) { |
| 2396 | if (iir == MOXA_MUST_IIR_GDA || |
| 2397 | iir == MOXA_MUST_IIR_RDA || |
| 2398 | iir == MOXA_MUST_IIR_RTO || |
| 2399 | iir == MOXA_MUST_IIR_LSR) |
| 2400 | mxser_receive_chars(port, |
| 2401 | &status); |
| 2402 | |
| 2403 | } else { |
| 2404 | status &= port->read_status_mask; |
| 2405 | if (status & UART_LSR_DR) |
| 2406 | mxser_receive_chars(port, |
| 2407 | &status); |
| 2408 | } |
| 2409 | msr = inb(port->ioaddr + UART_MSR); |
| 2410 | if (msr & UART_MSR_ANY_DELTA) |
| 2411 | mxser_check_modem_status(port, msr); |
| 2412 | |
| 2413 | if (port->board->chip_flag) { |
| 2414 | if (iir == 0x02 && (status & |
| 2415 | UART_LSR_THRE)) |
| 2416 | mxser_transmit_chars(port); |
| 2417 | } else { |
| 2418 | if (status & UART_LSR_THRE) |
| 2419 | mxser_transmit_chars(port); |
| 2420 | } |
| 2421 | } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); |
| 2422 | spin_unlock(&port->slock); |
| 2423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | } |
| 2425 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2426 | irq_stop: |
| 2427 | return handled; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2428 | } |
| 2429 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2430 | static const struct tty_operations mxser_ops = { |
| 2431 | .open = mxser_open, |
| 2432 | .close = mxser_close, |
| 2433 | .write = mxser_write, |
| 2434 | .put_char = mxser_put_char, |
| 2435 | .flush_chars = mxser_flush_chars, |
| 2436 | .write_room = mxser_write_room, |
| 2437 | .chars_in_buffer = mxser_chars_in_buffer, |
| 2438 | .flush_buffer = mxser_flush_buffer, |
| 2439 | .ioctl = mxser_ioctl, |
| 2440 | .throttle = mxser_throttle, |
| 2441 | .unthrottle = mxser_unthrottle, |
| 2442 | .set_termios = mxser_set_termios, |
| 2443 | .stop = mxser_stop, |
| 2444 | .start = mxser_start, |
| 2445 | .hangup = mxser_hangup, |
| 2446 | .break_ctl = mxser_rs_break, |
| 2447 | .wait_until_sent = mxser_wait_until_sent, |
| 2448 | .tiocmget = mxser_tiocmget, |
| 2449 | .tiocmset = mxser_tiocmset, |
| 2450 | }; |
| 2451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | /* |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2453 | * The MOXA Smartio/Industio serial driver boot-time initialization code! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | */ |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2455 | |
| 2456 | static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev, |
| 2457 | unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2459 | if (irq) |
| 2460 | free_irq(brd->irq, brd); |
| 2461 | if (pdev != NULL) { /* PCI */ |
| 2462 | #ifdef CONFIG_PCI |
| 2463 | pci_release_region(pdev, 2); |
| 2464 | pci_release_region(pdev, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | } else { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2467 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); |
| 2468 | release_region(brd->vector, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | } |
| 2471 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2472 | static int __devinit mxser_initbrd(struct mxser_board *brd, |
| 2473 | struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2475 | struct mxser_port *info; |
| 2476 | unsigned int i; |
| 2477 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2479 | printk(KERN_INFO "mxser: max. baud rate = %d bps\n", |
| 2480 | brd->ports[0].max_baud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2482 | for (i = 0; i < brd->info->nports; i++) { |
| 2483 | info = &brd->ports[i]; |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 2484 | tty_port_init(&info->port); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2485 | info->board = brd; |
| 2486 | info->stop_rx = 0; |
| 2487 | info->ldisc_stop_rx = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2489 | /* Enhance mode enabled here */ |
| 2490 | if (brd->chip_flag != MOXA_OTHER_UART) |
Christoph Hellwig | 148ff86 | 2008-04-30 00:54:29 -0700 | [diff] [blame] | 2491 | mxser_enable_must_enchance_mode(info->ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | |
Alan Cox | 0ad9e7d | 2008-07-16 21:56:10 +0100 | [diff] [blame] | 2493 | info->port.flags = ASYNC_SHARE_IRQ; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2494 | info->type = brd->uart_type; |
| 2495 | |
| 2496 | process_txrx_fifo(info); |
| 2497 | |
| 2498 | info->custom_divisor = info->baud_base * 16; |
Alan Cox | 44b7d1b | 2008-07-16 21:57:18 +0100 | [diff] [blame] | 2499 | info->port.close_delay = 5 * HZ / 10; |
| 2500 | info->port.closing_wait = 30 * HZ; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2501 | info->normal_termios = mxvar_sdriver->init_termios; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2502 | init_waitqueue_head(&info->delta_msr_wait); |
| 2503 | memset(&info->mon_data, 0, sizeof(struct mxser_mon)); |
| 2504 | info->err_shadow = 0; |
| 2505 | spin_lock_init(&info->slock); |
| 2506 | |
| 2507 | /* before set INT ISR, disable all int */ |
| 2508 | outb(inb(info->ioaddr + UART_IER) & 0xf0, |
| 2509 | info->ioaddr + UART_IER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | } |
| 2511 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2512 | retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", |
| 2513 | brd); |
| 2514 | if (retval) { |
| 2515 | printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " |
| 2516 | "conflict with another device.\n", |
| 2517 | brd->info->name, brd->irq); |
| 2518 | /* We hold resources, we need to release them. */ |
| 2519 | mxser_release_res(brd, pdev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | } |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 2521 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | } |
| 2523 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2524 | static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | { |
| 2526 | int id, i, bits; |
| 2527 | unsigned short regs[16], irq; |
| 2528 | unsigned char scratch, scratch2; |
| 2529 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2530 | brd->chip_flag = MOXA_OTHER_UART; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | |
| 2532 | id = mxser_read_register(cap, regs); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2533 | switch (id) { |
| 2534 | case C168_ASIC_ID: |
| 2535 | brd->info = &mxser_cards[0]; |
| 2536 | break; |
| 2537 | case C104_ASIC_ID: |
| 2538 | brd->info = &mxser_cards[1]; |
| 2539 | break; |
| 2540 | case CI104J_ASIC_ID: |
| 2541 | brd->info = &mxser_cards[2]; |
| 2542 | break; |
| 2543 | case C102_ASIC_ID: |
| 2544 | brd->info = &mxser_cards[5]; |
| 2545 | break; |
| 2546 | case CI132_ASIC_ID: |
| 2547 | brd->info = &mxser_cards[6]; |
| 2548 | break; |
| 2549 | case CI134_ASIC_ID: |
| 2550 | brd->info = &mxser_cards[7]; |
| 2551 | break; |
| 2552 | default: |
Jesper Juhl | 8ea2c2e | 2006-06-25 05:47:54 -0700 | [diff] [blame] | 2553 | return 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
| 2556 | irq = 0; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2557 | /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) |
| 2558 | Flag-hack checks if configuration should be read as 2-port here. */ |
| 2559 | if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | irq = regs[9] & 0xF000; |
| 2561 | irq = irq | (irq >> 4); |
| 2562 | if (irq != (regs[9] & 0xFF00)) |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2563 | goto err_irqconflict; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2564 | } else if (brd->info->nports == 4) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | irq = regs[9] & 0xF000; |
| 2566 | irq = irq | (irq >> 4); |
| 2567 | irq = irq | (irq >> 8); |
| 2568 | if (irq != regs[9]) |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2569 | goto err_irqconflict; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2570 | } else if (brd->info->nports == 8) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | irq = regs[9] & 0xF000; |
| 2572 | irq = irq | (irq >> 4); |
| 2573 | irq = irq | (irq >> 8); |
| 2574 | if ((irq != regs[9]) || (irq != regs[10])) |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2575 | goto err_irqconflict; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | } |
| 2577 | |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2578 | if (!irq) { |
| 2579 | printk(KERN_ERR "mxser: interrupt number unset\n"); |
| 2580 | return -EIO; |
| 2581 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2582 | brd->irq = ((int)(irq & 0xF000) >> 12); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | for (i = 0; i < 8; i++) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2584 | brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2585 | if ((regs[12] & 0x80) == 0) { |
| 2586 | printk(KERN_ERR "mxser: invalid interrupt vector\n"); |
| 2587 | return -EIO; |
| 2588 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2589 | brd->vector = (int)regs[11]; /* interrupt vector */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | if (id == 1) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2591 | brd->vector_mask = 0x00FF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | else |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2593 | brd->vector_mask = 0x000F; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { |
| 2595 | if (regs[12] & bits) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2596 | brd->ports[i].baud_base = 921600; |
| 2597 | brd->ports[i].max_baud = 921600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | } else { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2599 | brd->ports[i].baud_base = 115200; |
| 2600 | brd->ports[i].max_baud = 115200; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | } |
| 2602 | } |
| 2603 | scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); |
| 2604 | outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); |
| 2605 | outb(0, cap + UART_EFR); /* EFR is the same as FCR */ |
| 2606 | outb(scratch2, cap + UART_LCR); |
| 2607 | outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); |
| 2608 | scratch = inb(cap + UART_IIR); |
| 2609 | |
| 2610 | if (scratch & 0xC0) |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2611 | brd->uart_type = PORT_16550A; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | else |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2613 | brd->uart_type = PORT_16450; |
| 2614 | if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2615 | "mxser(IO)")) { |
| 2616 | printk(KERN_ERR "mxser: can't request ports I/O region: " |
| 2617 | "0x%.8lx-0x%.8lx\n", |
| 2618 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + |
| 2619 | 8 * brd->info->nports - 1); |
| 2620 | return -EIO; |
| 2621 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2622 | if (!request_region(brd->vector, 1, "mxser(vector)")) { |
| 2623 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2624 | printk(KERN_ERR "mxser: can't request interrupt vector region: " |
| 2625 | "0x%.8lx-0x%.8lx\n", |
| 2626 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + |
| 2627 | 8 * brd->info->nports - 1); |
| 2628 | return -EIO; |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2629 | } |
| 2630 | return brd->info->nports; |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2631 | |
| 2632 | err_irqconflict: |
| 2633 | printk(KERN_ERR "mxser: invalid interrupt number\n"); |
| 2634 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2635 | } |
| 2636 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2637 | static int __devinit mxser_probe(struct pci_dev *pdev, |
| 2638 | const struct pci_device_id *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2640 | #ifdef CONFIG_PCI |
| 2641 | struct mxser_board *brd; |
| 2642 | unsigned int i, j; |
| 2643 | unsigned long ioaddress; |
| 2644 | int retval = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2645 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2646 | for (i = 0; i < MXSER_BOARDS; i++) |
| 2647 | if (mxser_boards[i].info == NULL) |
| 2648 | break; |
| 2649 | |
| 2650 | if (i >= MXSER_BOARDS) { |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2651 | dev_err(&pdev->dev, "too many boards found (maximum %d), board " |
| 2652 | "not configured\n", MXSER_BOARDS); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2653 | goto err; |
| 2654 | } |
| 2655 | |
| 2656 | brd = &mxser_boards[i]; |
| 2657 | brd->idx = i * MXSER_PORTS_PER_BOARD; |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2658 | dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2659 | mxser_cards[ent->driver_data].name, |
| 2660 | pdev->bus->number, PCI_SLOT(pdev->devfn)); |
| 2661 | |
| 2662 | retval = pci_enable_device(pdev); |
| 2663 | if (retval) { |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2664 | dev_err(&pdev->dev, "PCI enable failed\n"); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2665 | goto err; |
| 2666 | } |
| 2667 | |
| 2668 | /* io address */ |
| 2669 | ioaddress = pci_resource_start(pdev, 2); |
| 2670 | retval = pci_request_region(pdev, 2, "mxser(IO)"); |
| 2671 | if (retval) |
| 2672 | goto err; |
| 2673 | |
| 2674 | brd->info = &mxser_cards[ent->driver_data]; |
| 2675 | for (i = 0; i < brd->info->nports; i++) |
| 2676 | brd->ports[i].ioaddr = ioaddress + 8 * i; |
| 2677 | |
| 2678 | /* vector */ |
| 2679 | ioaddress = pci_resource_start(pdev, 3); |
| 2680 | retval = pci_request_region(pdev, 3, "mxser(vector)"); |
| 2681 | if (retval) |
| 2682 | goto err_relio; |
| 2683 | brd->vector = ioaddress; |
| 2684 | |
| 2685 | /* irq */ |
| 2686 | brd->irq = pdev->irq; |
| 2687 | |
| 2688 | brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); |
| 2689 | brd->uart_type = PORT_16550A; |
| 2690 | brd->vector_mask = 0; |
| 2691 | |
| 2692 | for (i = 0; i < brd->info->nports; i++) { |
| 2693 | for (j = 0; j < UART_INFO_NUM; j++) { |
| 2694 | if (Gpci_uart_info[j].type == brd->chip_flag) { |
| 2695 | brd->ports[i].max_baud = |
| 2696 | Gpci_uart_info[j].max_baud; |
| 2697 | |
| 2698 | /* exception....CP-102 */ |
| 2699 | if (brd->info->flags & MXSER_HIGHBAUD) |
| 2700 | brd->ports[i].max_baud = 921600; |
| 2701 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | } |
| 2703 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2704 | } |
| 2705 | |
| 2706 | if (brd->chip_flag == MOXA_MUST_MU860_HWID) { |
| 2707 | for (i = 0; i < brd->info->nports; i++) { |
| 2708 | if (i < 4) |
| 2709 | brd->ports[i].opmode_ioaddr = ioaddress + 4; |
| 2710 | else |
| 2711 | brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2713 | outb(0, ioaddress + 4); /* default set to RS232 mode */ |
| 2714 | outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2716 | |
| 2717 | for (i = 0; i < brd->info->nports; i++) { |
| 2718 | brd->vector_mask |= (1 << i); |
| 2719 | brd->ports[i].baud_base = 921600; |
| 2720 | } |
| 2721 | |
| 2722 | /* mxser_initbrd will hook ISR. */ |
| 2723 | retval = mxser_initbrd(brd, pdev); |
| 2724 | if (retval) |
| 2725 | goto err_null; |
| 2726 | |
| 2727 | for (i = 0; i < brd->info->nports; i++) |
| 2728 | tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); |
| 2729 | |
| 2730 | pci_set_drvdata(pdev, brd); |
| 2731 | |
| 2732 | return 0; |
| 2733 | err_relio: |
| 2734 | pci_release_region(pdev, 2); |
| 2735 | err_null: |
| 2736 | brd->info = NULL; |
| 2737 | err: |
| 2738 | return retval; |
| 2739 | #else |
| 2740 | return -ENODEV; |
| 2741 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | } |
| 2743 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2744 | static void __devexit mxser_remove(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2745 | { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2746 | struct mxser_board *brd = pci_get_drvdata(pdev); |
| 2747 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2748 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2749 | for (i = 0; i < brd->info->nports; i++) |
| 2750 | tty_unregister_device(mxvar_sdriver, brd->idx + i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2752 | mxser_release_res(brd, pdev, 1); |
| 2753 | brd->info = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | } |
| 2755 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2756 | static struct pci_driver mxser_driver = { |
| 2757 | .name = "mxser", |
| 2758 | .id_table = mxser_pcibrds, |
| 2759 | .probe = mxser_probe, |
| 2760 | .remove = __devexit_p(mxser_remove) |
| 2761 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2763 | static int __init mxser_module_init(void) |
| 2764 | { |
| 2765 | struct mxser_board *brd; |
| 2766 | unsigned long cap; |
| 2767 | unsigned int i, m, isaloop; |
| 2768 | int retval, b; |
| 2769 | |
| 2770 | pr_debug("Loading module mxser ...\n"); |
| 2771 | |
| 2772 | mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); |
| 2773 | if (!mxvar_sdriver) |
| 2774 | return -ENOMEM; |
| 2775 | |
| 2776 | printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", |
| 2777 | MXSER_VERSION); |
| 2778 | |
| 2779 | /* Initialize the tty_driver structure */ |
| 2780 | mxvar_sdriver->owner = THIS_MODULE; |
| 2781 | mxvar_sdriver->magic = TTY_DRIVER_MAGIC; |
| 2782 | mxvar_sdriver->name = "ttyMI"; |
| 2783 | mxvar_sdriver->major = ttymajor; |
| 2784 | mxvar_sdriver->minor_start = 0; |
| 2785 | mxvar_sdriver->num = MXSER_PORTS + 1; |
| 2786 | mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2787 | mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; |
| 2788 | mxvar_sdriver->init_termios = tty_std_termios; |
| 2789 | mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; |
| 2790 | mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; |
| 2791 | tty_set_operations(mxvar_sdriver, &mxser_ops); |
| 2792 | |
| 2793 | retval = tty_register_driver(mxvar_sdriver); |
| 2794 | if (retval) { |
| 2795 | printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " |
| 2796 | "tty driver !\n"); |
| 2797 | goto err_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | } |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2799 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2800 | m = 0; |
| 2801 | /* Start finding ISA boards here */ |
| 2802 | for (isaloop = 0; isaloop < 2; isaloop++) |
| 2803 | for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) { |
| 2804 | if (!isaloop) |
| 2805 | cap = mxserBoardCAP[b]; /* predefined */ |
| 2806 | else |
| 2807 | cap = ioaddr[b]; /* module param */ |
| 2808 | |
| 2809 | if (!cap) |
| 2810 | continue; |
| 2811 | |
| 2812 | brd = &mxser_boards[m]; |
| 2813 | retval = mxser_get_ISA_conf(cap, brd); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2814 | if (retval <= 0) { |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2815 | brd->info = NULL; |
| 2816 | continue; |
| 2817 | } |
| 2818 | |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2819 | printk(KERN_INFO "mxser: found MOXA %s board " |
| 2820 | "(CAP=0x%x)\n", brd->info->name, ioaddr[b]); |
| 2821 | |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2822 | /* mxser_initbrd will hook ISR. */ |
| 2823 | if (mxser_initbrd(brd, NULL) < 0) { |
| 2824 | brd->info = NULL; |
| 2825 | continue; |
| 2826 | } |
| 2827 | |
| 2828 | brd->idx = m * MXSER_PORTS_PER_BOARD; |
| 2829 | for (i = 0; i < brd->info->nports; i++) |
| 2830 | tty_register_device(mxvar_sdriver, brd->idx + i, |
| 2831 | NULL); |
| 2832 | |
| 2833 | m++; |
| 2834 | } |
| 2835 | |
| 2836 | retval = pci_register_driver(&mxser_driver); |
| 2837 | if (retval) { |
Jiri Slaby | 83766bc | 2008-07-25 01:48:21 -0700 | [diff] [blame^] | 2838 | printk(KERN_ERR "mxser: can't register pci driver\n"); |
Jiri Slaby | 1c45607 | 2008-02-07 00:16:46 -0800 | [diff] [blame] | 2839 | if (!m) { |
| 2840 | retval = -ENODEV; |
| 2841 | goto err_unr; |
| 2842 | } /* else: we have some ISA cards under control */ |
| 2843 | } |
| 2844 | |
| 2845 | pr_debug("Done.\n"); |
| 2846 | |
| 2847 | return 0; |
| 2848 | err_unr: |
| 2849 | tty_unregister_driver(mxvar_sdriver); |
| 2850 | err_put: |
| 2851 | put_tty_driver(mxvar_sdriver); |
| 2852 | return retval; |
| 2853 | } |
| 2854 | |
| 2855 | static void __exit mxser_module_exit(void) |
| 2856 | { |
| 2857 | unsigned int i, j; |
| 2858 | |
| 2859 | pr_debug("Unloading module mxser ...\n"); |
| 2860 | |
| 2861 | pci_unregister_driver(&mxser_driver); |
| 2862 | |
| 2863 | for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ |
| 2864 | if (mxser_boards[i].info != NULL) |
| 2865 | for (j = 0; j < mxser_boards[i].info->nports; j++) |
| 2866 | tty_unregister_device(mxvar_sdriver, |
| 2867 | mxser_boards[i].idx + j); |
| 2868 | tty_unregister_driver(mxvar_sdriver); |
| 2869 | put_tty_driver(mxvar_sdriver); |
| 2870 | |
| 2871 | for (i = 0; i < MXSER_BOARDS; i++) |
| 2872 | if (mxser_boards[i].info != NULL) |
| 2873 | mxser_release_res(&mxser_boards[i], NULL, 1); |
| 2874 | |
| 2875 | pr_debug("Done.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2876 | } |
| 2877 | |
| 2878 | module_init(mxser_module_init); |
| 2879 | module_exit(mxser_module_exit); |