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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 | /* * cycx_main.c Cyclades Cyclom 2X WAN Link Driver. Main module. * * Author: Arnaldo Carvalho de Melo <acme@conectiva.com.br> * * Copyright: (c) 1998-2003 Arnaldo Carvalho de Melo * * Based on sdlamain.c by Gene Kozin <genek@compuserve.com> & * Jaspreet Singh <jaspreet@sangoma.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * ============================================================================ * Please look at the bitkeeper changelog (or any other scm tool that ends up * importing bitkeeper changelog or that replaces bitkeeper in the future as * main tool for linux development). * * 2001/05/09 acme Fix MODULE_DESC for debug, .bss nitpicks, * some cleanups * 2000/07/13 acme remove useless #ifdef MODULE and crap * #if KERNEL_VERSION > blah * 2000/07/06 acme __exit at cyclomx_cleanup * 2000/04/02 acme dprintk and cycx_debug * module_init/module_exit * 2000/01/21 acme rename cyclomx_open to cyclomx_mod_inc_use_count * and cyclomx_close to cyclomx_mod_dec_use_count * 2000/01/08 acme cleanup * 1999/11/06 acme cycx_down back to life (it needs to be * called to iounmap the dpmbase) * 1999/08/09 acme removed references to enable_tx_int * use spinlocks instead of cli/sti in * cyclomx_set_state * 1999/05/19 acme works directly linked into the kernel * init_waitqueue_head for 2.3.* kernel * 1999/05/18 acme major cleanup (polling not needed), etc * 1998/08/28 acme minor cleanup (ioctls for firmware deleted) * queue_task activated * 1998/08/08 acme Initial version. */ #include <linux/config.h> /* OS configuration options */ #include <linux/stddef.h> /* offsetof(), etc. */ #include <linux/errno.h> /* return codes */ #include <linux/string.h> /* inline memset(), etc. */ #include <linux/slab.h> /* kmalloc(), kfree() */ #include <linux/kernel.h> /* printk(), and other useful stuff */ #include <linux/module.h> /* support for loadable modules */ #include <linux/ioport.h> /* request_region(), release_region() */ #include <linux/wanrouter.h> /* WAN router definitions */ #include <linux/cyclomx.h> /* cyclomx common user API definitions */ #include <linux/init.h> /* __init (when not using as a module) */ unsigned int cycx_debug; MODULE_AUTHOR("Arnaldo Carvalho de Melo"); MODULE_DESCRIPTION("Cyclom 2X Sync Card Driver."); MODULE_LICENSE("GPL"); MODULE_PARM(cycx_debug, "i"); MODULE_PARM_DESC(cycx_debug, "cyclomx debug level"); /* Defines & Macros */ #define CYCX_DRV_VERSION 0 /* version number */ #define CYCX_DRV_RELEASE 11 /* release (minor version) number */ #define CYCX_MAX_CARDS 1 /* max number of adapters */ #define CONFIG_CYCX_CARDS 1 /* Function Prototypes */ /* WAN link driver entry points */ static int cycx_wan_setup(struct wan_device *wandev, wandev_conf_t *conf); static int cycx_wan_shutdown(struct wan_device *wandev); /* Miscellaneous functions */ static irqreturn_t cycx_isr(int irq, void *dev_id, struct pt_regs *regs); /* Global Data * Note: All data must be explicitly initialized!!! */ /* private data */ static char cycx_drvname[] = "cyclomx"; static char cycx_fullname[] = "CYCLOM 2X(tm) Sync Card Driver"; static char cycx_copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo " "<acme@conectiva.com.br>"; static int cycx_ncards = CONFIG_CYCX_CARDS; static struct cycx_device *cycx_card_array; /* adapter data space */ /* Kernel Loadable Module Entry Points */ /* * Module 'insert' entry point. * o print announcement * o allocate adapter data space * o initialize static data * o register all cards with WAN router * o calibrate Cyclom 2X shared memory access delay. * * Return: 0 Ok * < 0 error. * Context: process */ int __init cycx_init(void) { int cnt, err = -ENOMEM; printk(KERN_INFO "%s v%u.%u %s\n", cycx_fullname, CYCX_DRV_VERSION, CYCX_DRV_RELEASE, cycx_copyright); /* Verify number of cards and allocate adapter data space */ cycx_ncards = min_t(int, cycx_ncards, CYCX_MAX_CARDS); cycx_ncards = max_t(int, cycx_ncards, 1); cycx_card_array = kmalloc(sizeof(struct cycx_device) * cycx_ncards, GFP_KERNEL); if (!cycx_card_array) goto out; memset(cycx_card_array, 0, sizeof(struct cycx_device) * cycx_ncards); /* Register adapters with WAN router */ for (cnt = 0; cnt < cycx_ncards; ++cnt) { struct cycx_device *card = &cycx_card_array[cnt]; struct wan_device *wandev = &card->wandev; sprintf(card->devname, "%s%d", cycx_drvname, cnt + 1); wandev->magic = ROUTER_MAGIC; wandev->name = card->devname; wandev->private = card; wandev->setup = cycx_wan_setup; wandev->shutdown = cycx_wan_shutdown; err = register_wan_device(wandev); if (err) { printk(KERN_ERR "%s: %s registration failed with " "error %d!\n", cycx_drvname, card->devname, err); break; } } err = -ENODEV; if (!cnt) { kfree(cycx_card_array); goto out; } err = 0; cycx_ncards = cnt; /* adjust actual number of cards */ out: return err; } /* * Module 'remove' entry point. * o unregister all adapters from the WAN router * o release all remaining system resources */ static void __exit cycx_exit(void) { int i = 0; for (; i < cycx_ncards; ++i) { struct cycx_device *card = &cycx_card_array[i]; unregister_wan_device(card->devname); } kfree(cycx_card_array); } /* WAN Device Driver Entry Points */ /* * Setup/configure WAN link driver. * o check adapter state * o make sure firmware is present in configuration * o allocate interrupt vector * o setup Cyclom 2X hardware * o call appropriate routine to perform protocol-specific initialization * * This function is called when router handles ROUTER_SETUP IOCTL. The * configuration structure is in kernel memory (including extended data, if * any). */ static int cycx_wan_setup(struct wan_device *wandev, wandev_conf_t *conf) { int rc = -EFAULT; struct cycx_device *card; int irq; /* Sanity checks */ if (!wandev || !wandev->private || !conf) goto out; card = wandev->private; rc = -EBUSY; if (wandev->state != WAN_UNCONFIGURED) goto out; rc = -EINVAL; if (!conf->data_size || !conf->data) { printk(KERN_ERR "%s: firmware not found in configuration " "data!\n", wandev->name); goto out; } if (conf->irq <= 0) { printk(KERN_ERR "%s: can't configure without IRQ!\n", wandev->name); goto out; } /* Allocate IRQ */ irq = conf->irq == 2 ? 9 : conf->irq; /* IRQ2 -> IRQ9 */ if (request_irq(irq, cycx_isr, 0, wandev->name, card)) { printk(KERN_ERR "%s: can't reserve IRQ %d!\n", wandev->name, irq); goto out; } /* Configure hardware, load firmware, etc. */ memset(&card->hw, 0, sizeof(card->hw)); card->hw.irq = irq; card->hw.dpmbase = (void *)conf->maddr; card->hw.dpmsize = CYCX_WINDOWSIZE; card->hw.fwid = CFID_X25_2X; card->lock = SPIN_LOCK_UNLOCKED; init_waitqueue_head(&card->wait_stats); rc = cycx_setup(&card->hw, conf->data, conf->data_size); if (rc) goto out_irq; /* Initialize WAN device data space */ wandev->irq = irq; wandev->dma = wandev->ioport = 0; wandev->maddr = (unsigned long)card->hw.dpmbase; wandev->msize = card->hw.dpmsize; wandev->hw_opt[2] = 0; wandev->hw_opt[3] = card->hw.fwid; /* Protocol-specific initialization */ switch (card->hw.fwid) { #ifdef CONFIG_CYCLOMX_X25 case CFID_X25_2X: rc = cycx_x25_wan_init(card, conf); break; #endif default: printk(KERN_ERR "%s: this firmware is not supported!\n", wandev->name); rc = -EINVAL; } if (rc) { cycx_down(&card->hw); goto out_irq; } rc = 0; out: return rc; out_irq: free_irq(irq, card); goto out; } /* * Shut down WAN link driver. * o shut down adapter hardware * o release system resources. * * This function is called by the router when device is being unregistered or * when it handles ROUTER_DOWN IOCTL. */ static int cycx_wan_shutdown(struct wan_device *wandev) { int ret = -EFAULT; struct cycx_device *card; /* sanity checks */ if (!wandev || !wandev->private) goto out; ret = 0; if (wandev->state == WAN_UNCONFIGURED) goto out; card = wandev->private; wandev->state = WAN_UNCONFIGURED; cycx_down(&card->hw); printk(KERN_INFO "%s: irq %d being freed!\n", wandev->name, wandev->irq); free_irq(wandev->irq, card); out: return ret; } /* Miscellaneous */ /* * Cyclom 2X Interrupt Service Routine. * o acknowledge Cyclom 2X hardware interrupt. * o call protocol-specific interrupt service routine, if any. */ static irqreturn_t cycx_isr(int irq, void *dev_id, struct pt_regs *regs) { struct cycx_device *card = (struct cycx_device *)dev_id; if (!card || card->wandev.state == WAN_UNCONFIGURED) goto out; if (card->in_isr) { printk(KERN_WARNING "%s: interrupt re-entrancy on IRQ %d!\n", card->devname, card->wandev.irq); goto out; } if (card->isr) card->isr(card); return IRQ_HANDLED; out: return IRQ_NONE; } /* Set WAN device state. */ void cycx_set_state(struct cycx_device *card, int state) { unsigned long flags; char *string_state = NULL; spin_lock_irqsave(&card->lock, flags); if (card->wandev.state != state) { switch (state) { case WAN_CONNECTED: string_state = "connected!"; break; case WAN_DISCONNECTED: string_state = "disconnected!"; break; } printk(KERN_INFO "%s: link %s\n", card->devname, string_state); card->wandev.state = state; } card->state_tick = jiffies; spin_unlock_irqrestore(&card->lock, flags); } module_init(cycx_init); module_exit(cycx_exit); |