Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 1 | /* |
| 2 | * SGI IOC3 master driver and IRQ demuxer |
| 3 | * |
| 4 | * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org> |
| 5 | * Heavily based on similar work by: |
| 6 | * Brent Casavant <bcasavan@sgi.com> - IOC4 master driver |
| 7 | * Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer |
| 8 | */ |
| 9 | |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 10 | #include <linux/errno.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/pci.h> |
Tobias Klauser | 56b146d | 2006-04-10 22:54:21 -0700 | [diff] [blame] | 13 | #include <linux/dma-mapping.h> |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/ioc3.h> |
| 18 | #include <linux/rwsem.h> |
| 19 | |
| 20 | #define IOC3_PCI_SIZE 0x100000 |
| 21 | |
| 22 | static LIST_HEAD(ioc3_devices); |
| 23 | static int ioc3_counter; |
| 24 | static DECLARE_RWSEM(ioc3_devices_rwsem); |
| 25 | |
| 26 | static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES]; |
| 27 | static struct ioc3_submodule *ioc3_ethernet; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 28 | static DEFINE_RWLOCK(ioc3_submodules_lock); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 29 | |
| 30 | /* NIC probing code */ |
| 31 | |
| 32 | #define GPCR_MLAN_EN 0x00200000 /* enable MCR to pin 8 */ |
| 33 | |
| 34 | static inline unsigned mcr_pack(unsigned pulse, unsigned sample) |
| 35 | { |
| 36 | return (pulse << 10) | (sample << 2); |
| 37 | } |
| 38 | |
| 39 | static int nic_wait(struct ioc3_driver_data *idd) |
| 40 | { |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 41 | unsigned mcr; |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 42 | |
| 43 | do { |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 44 | mcr = readl(&idd->vma->mcr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 45 | } while (!(mcr & 2)); |
| 46 | |
| 47 | return mcr & 1; |
| 48 | } |
| 49 | |
| 50 | static int nic_reset(struct ioc3_driver_data *idd) |
| 51 | { |
| 52 | int presence; |
| 53 | unsigned long flags; |
| 54 | |
| 55 | local_irq_save(flags); |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 56 | writel(mcr_pack(500, 65), &idd->vma->mcr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 57 | presence = nic_wait(idd); |
| 58 | local_irq_restore(flags); |
| 59 | |
| 60 | udelay(500); |
| 61 | |
| 62 | return presence; |
| 63 | } |
| 64 | |
Pat Gefre | 15b370c | 2006-02-28 16:59:09 -0800 | [diff] [blame] | 65 | static int nic_read_bit(struct ioc3_driver_data *idd) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 66 | { |
| 67 | int result; |
| 68 | unsigned long flags; |
| 69 | |
| 70 | local_irq_save(flags); |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 71 | writel(mcr_pack(6, 13), &idd->vma->mcr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 72 | result = nic_wait(idd); |
| 73 | local_irq_restore(flags); |
| 74 | |
| 75 | udelay(500); |
| 76 | |
| 77 | return result; |
| 78 | } |
| 79 | |
Pat Gefre | 15b370c | 2006-02-28 16:59:09 -0800 | [diff] [blame] | 80 | static void nic_write_bit(struct ioc3_driver_data *idd, int bit) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 81 | { |
| 82 | if (bit) |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 83 | writel(mcr_pack(6, 110), &idd->vma->mcr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 84 | else |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 85 | writel(mcr_pack(80, 30), &idd->vma->mcr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 86 | |
| 87 | nic_wait(idd); |
| 88 | } |
| 89 | |
| 90 | static unsigned nic_read_byte(struct ioc3_driver_data *idd) |
| 91 | { |
| 92 | unsigned result = 0; |
| 93 | int i; |
| 94 | |
| 95 | for (i = 0; i < 8; i++) |
| 96 | result = (result >> 1) | (nic_read_bit(idd) << 7); |
| 97 | |
| 98 | return result; |
| 99 | } |
| 100 | |
| 101 | static void nic_write_byte(struct ioc3_driver_data *idd, int byte) |
| 102 | { |
| 103 | int i, bit; |
| 104 | |
| 105 | for (i = 8; i; i--) { |
| 106 | bit = byte & 1; |
| 107 | byte >>= 1; |
| 108 | |
| 109 | nic_write_bit(idd, bit); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | static unsigned long |
| 114 | nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr) |
| 115 | { |
| 116 | int a, b, index, disc; |
| 117 | |
| 118 | nic_reset(idd); |
| 119 | |
| 120 | /* Search ROM. */ |
| 121 | nic_write_byte(idd, 0xF0); |
| 122 | |
| 123 | /* Algorithm from ``Book of iButton Standards''. */ |
| 124 | for (index = 0, disc = 0; index < 64; index++) { |
| 125 | a = nic_read_bit(idd); |
| 126 | b = nic_read_bit(idd); |
| 127 | |
| 128 | if (a && b) { |
| 129 | printk(KERN_WARNING "IOC3 NIC search failed.\n"); |
| 130 | *last = 0; |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | if (!a && !b) { |
| 135 | if (index == *last) { |
| 136 | addr |= 1UL << index; |
| 137 | } else if (index > *last) { |
| 138 | addr &= ~(1UL << index); |
| 139 | disc = index; |
| 140 | } else if ((addr & (1UL << index)) == 0) |
| 141 | disc = index; |
| 142 | nic_write_bit(idd, (addr>>index)&1); |
| 143 | continue; |
| 144 | } else { |
| 145 | if (a) |
| 146 | addr |= 1UL << index; |
| 147 | else |
| 148 | addr &= ~(1UL << index); |
| 149 | nic_write_bit(idd, a); |
| 150 | continue; |
| 151 | } |
| 152 | } |
| 153 | *last = disc; |
| 154 | return addr; |
| 155 | } |
| 156 | |
| 157 | static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr) |
| 158 | { |
| 159 | int index; |
| 160 | |
| 161 | nic_reset(idd); |
| 162 | nic_write_byte(idd, 0xF0); |
| 163 | for (index = 0; index < 64; index++) { |
| 164 | nic_read_bit(idd); |
| 165 | nic_read_bit(idd); |
| 166 | nic_write_bit(idd, (addr>>index)&1); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | static void crc16_byte(unsigned int *crc, unsigned char db) |
| 171 | { |
| 172 | int i; |
| 173 | |
| 174 | for(i=0;i<8;i++) { |
| 175 | *crc <<= 1; |
| 176 | if((db^(*crc>>16)) & 1) |
| 177 | *crc ^= 0x8005; |
| 178 | db >>= 1; |
| 179 | } |
| 180 | *crc &= 0xFFFF; |
| 181 | } |
| 182 | |
| 183 | static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc) |
| 184 | { |
| 185 | while(size--) |
| 186 | crc16_byte(&crc, *(dbs++)); |
| 187 | return crc; |
| 188 | } |
| 189 | |
| 190 | static void crc8_byte(unsigned int *crc, unsigned char db) |
| 191 | { |
| 192 | int i,f; |
| 193 | |
| 194 | for(i=0;i<8;i++) { |
| 195 | f = (*crc ^ db) & 1; |
| 196 | *crc >>= 1; |
| 197 | db >>= 1; |
| 198 | if(f) |
| 199 | *crc ^= 0x8c; |
| 200 | } |
| 201 | *crc &= 0xff; |
| 202 | } |
| 203 | |
| 204 | static unsigned int crc8_addr(unsigned long addr) |
| 205 | { |
| 206 | int i; |
| 207 | unsigned int crc = 0x00; |
| 208 | |
| 209 | for(i=0;i<8;i++) |
| 210 | crc8_byte(&crc, addr>>(i<<3)); |
| 211 | return crc; |
| 212 | } |
| 213 | |
| 214 | static void |
| 215 | read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page, |
| 216 | unsigned char *redir, unsigned char *data) |
| 217 | { |
| 218 | int loops = 16, i; |
| 219 | |
| 220 | while(redir[page] != 0xFF) { |
| 221 | page = redir[page]^0xFF; |
| 222 | loops--; |
| 223 | if(loops<0) { |
| 224 | printk(KERN_ERR "IOC3: NIC circular redirection\n"); |
| 225 | return; |
| 226 | } |
| 227 | } |
| 228 | loops = 3; |
| 229 | while(loops>0) { |
| 230 | nic_addr(idd, addr); |
| 231 | nic_write_byte(idd, 0xF0); |
| 232 | nic_write_byte(idd, (page << 5) & 0xE0); |
| 233 | nic_write_byte(idd, (page >> 3) & 0x1F); |
| 234 | for(i=0;i<0x20;i++) |
| 235 | data[i] = nic_read_byte(idd); |
| 236 | if(crc16_area(data, 0x20, 0x0000) == 0x800d) |
| 237 | return; |
| 238 | loops--; |
| 239 | } |
| 240 | printk(KERN_ERR "IOC3: CRC error in data page\n"); |
| 241 | for(i=0;i<0x20;i++) |
| 242 | data[i] = 0x00; |
| 243 | } |
| 244 | |
| 245 | static void |
| 246 | read_redir_map(struct ioc3_driver_data *idd, unsigned long addr, |
| 247 | unsigned char *redir) |
| 248 | { |
| 249 | int i,j,loops = 3,crc_ok; |
| 250 | unsigned int crc; |
| 251 | |
| 252 | while(loops>0) { |
| 253 | crc_ok = 1; |
| 254 | nic_addr(idd, addr); |
| 255 | nic_write_byte(idd, 0xAA); |
| 256 | nic_write_byte(idd, 0x00); |
| 257 | nic_write_byte(idd, 0x01); |
| 258 | for(i=0;i<64;i+=8) { |
| 259 | for(j=0;j<8;j++) |
| 260 | redir[i+j] = nic_read_byte(idd); |
| 261 | crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000); |
| 262 | crc16_byte(&crc, nic_read_byte(idd)); |
| 263 | crc16_byte(&crc, nic_read_byte(idd)); |
| 264 | if(crc != 0x800d) |
| 265 | crc_ok = 0; |
| 266 | } |
| 267 | if(crc_ok) |
| 268 | return; |
| 269 | loops--; |
| 270 | } |
| 271 | printk(KERN_ERR "IOC3: CRC error in redirection page\n"); |
| 272 | for(i=0;i<64;i++) |
| 273 | redir[i] = 0xFF; |
| 274 | } |
| 275 | |
| 276 | static void read_nic(struct ioc3_driver_data *idd, unsigned long addr) |
| 277 | { |
| 278 | unsigned char redir[64]; |
| 279 | unsigned char data[64],part[32]; |
| 280 | int i,j; |
| 281 | |
| 282 | /* read redirections */ |
| 283 | read_redir_map(idd, addr, redir); |
| 284 | /* read data pages */ |
| 285 | read_redir_page(idd, addr, 0, redir, data); |
| 286 | read_redir_page(idd, addr, 1, redir, data+32); |
| 287 | /* assemble the part # */ |
| 288 | j=0; |
| 289 | for(i=0;i<19;i++) |
| 290 | if(data[i+11] != ' ') |
| 291 | part[j++] = data[i+11]; |
| 292 | for(i=0;i<6;i++) |
| 293 | if(data[i+32] != ' ') |
| 294 | part[j++] = data[i+32]; |
| 295 | part[j] = 0; |
| 296 | /* skip Octane power supplies */ |
| 297 | if(!strncmp(part, "060-0035-", 9)) |
| 298 | return; |
| 299 | if(!strncmp(part, "060-0038-", 9)) |
| 300 | return; |
| 301 | strcpy(idd->nic_part, part); |
| 302 | /* assemble the serial # */ |
| 303 | j=0; |
| 304 | for(i=0;i<10;i++) |
| 305 | if(data[i+1] != ' ') |
| 306 | idd->nic_serial[j++] = data[i+1]; |
| 307 | idd->nic_serial[j] = 0; |
| 308 | } |
| 309 | |
| 310 | static void read_mac(struct ioc3_driver_data *idd, unsigned long addr) |
| 311 | { |
| 312 | int i, loops = 3; |
| 313 | unsigned char data[13]; |
| 314 | |
| 315 | while(loops>0) { |
| 316 | nic_addr(idd, addr); |
| 317 | nic_write_byte(idd, 0xF0); |
| 318 | nic_write_byte(idd, 0x00); |
| 319 | nic_write_byte(idd, 0x00); |
| 320 | nic_read_byte(idd); |
| 321 | for(i=0;i<13;i++) |
| 322 | data[i] = nic_read_byte(idd); |
| 323 | if(crc16_area(data, 13, 0x0000) == 0x800d) { |
| 324 | for(i=10;i>4;i--) |
| 325 | idd->nic_mac[10-i] = data[i]; |
| 326 | return; |
| 327 | } |
| 328 | loops--; |
| 329 | } |
| 330 | printk(KERN_ERR "IOC3: CRC error in MAC address\n"); |
| 331 | for(i=0;i<6;i++) |
| 332 | idd->nic_mac[i] = 0x00; |
| 333 | } |
| 334 | |
| 335 | static void probe_nic(struct ioc3_driver_data *idd) |
| 336 | { |
| 337 | int save = 0, loops = 3; |
| 338 | unsigned long first, addr; |
| 339 | |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 340 | writel(GPCR_MLAN_EN, &idd->vma->gpcr_s); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 341 | |
| 342 | while(loops>0) { |
| 343 | idd->nic_part[0] = 0; |
| 344 | idd->nic_serial[0] = 0; |
| 345 | addr = first = nic_find(idd, &save, 0); |
| 346 | if(!first) |
| 347 | return; |
| 348 | while(1) { |
| 349 | if(crc8_addr(addr)) |
| 350 | break; |
| 351 | else { |
| 352 | switch(addr & 0xFF) { |
| 353 | case 0x0B: |
| 354 | read_nic(idd, addr); |
| 355 | break; |
| 356 | case 0x09: |
| 357 | case 0x89: |
| 358 | case 0x91: |
| 359 | read_mac(idd, addr); |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | addr = nic_find(idd, &save, addr); |
| 364 | if(addr == first) |
| 365 | return; |
| 366 | } |
| 367 | loops--; |
| 368 | } |
| 369 | printk(KERN_ERR "IOC3: CRC error in NIC address\n"); |
| 370 | } |
| 371 | |
| 372 | /* Interrupts */ |
| 373 | |
Pat Gefre | 15b370c | 2006-02-28 16:59:09 -0800 | [diff] [blame] | 374 | static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 375 | { |
| 376 | unsigned long flags; |
| 377 | |
| 378 | spin_lock_irqsave(&idd->ir_lock, flags); |
| 379 | switch (which) { |
| 380 | case IOC3_W_IES: |
| 381 | writel(val, &idd->vma->sio_ies); |
| 382 | break; |
| 383 | case IOC3_W_IEC: |
| 384 | writel(val, &idd->vma->sio_iec); |
| 385 | break; |
| 386 | } |
| 387 | spin_unlock_irqrestore(&idd->ir_lock, flags); |
| 388 | } |
| 389 | static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd) |
| 390 | { |
| 391 | unsigned long flag; |
| 392 | uint32_t intrs = 0; |
| 393 | |
| 394 | spin_lock_irqsave(&idd->ir_lock, flag); |
| 395 | intrs = readl(&idd->vma->sio_ir); |
| 396 | intrs &= readl(&idd->vma->sio_ies); |
| 397 | spin_unlock_irqrestore(&idd->ir_lock, flag); |
| 398 | return intrs; |
| 399 | } |
| 400 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 401 | static irqreturn_t ioc3_intr_io(int irq, void *arg) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 402 | { |
| 403 | unsigned long flags; |
Jeff Garzik | c7bec5a | 2006-10-06 15:00:58 -0400 | [diff] [blame] | 404 | struct ioc3_driver_data *idd = arg; |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 405 | int handled = 1, id; |
| 406 | unsigned int pending; |
| 407 | |
| 408 | read_lock_irqsave(&ioc3_submodules_lock, flags); |
| 409 | |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 410 | if(idd->dual_irq && readb(&idd->vma->eisr)) { |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 411 | /* send Ethernet IRQ to the driver */ |
| 412 | if(ioc3_ethernet && idd->active[ioc3_ethernet->id] && |
| 413 | ioc3_ethernet->intr) { |
| 414 | handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 415 | idd, 0); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 416 | } |
| 417 | } |
| 418 | pending = get_pending_intrs(idd); /* look at the IO IRQs */ |
| 419 | |
| 420 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) { |
| 421 | if(idd->active[id] && ioc3_submodules[id] |
| 422 | && (pending & ioc3_submodules[id]->irq_mask) |
| 423 | && ioc3_submodules[id]->intr) { |
| 424 | write_ireg(idd, ioc3_submodules[id]->irq_mask, |
| 425 | IOC3_W_IEC); |
| 426 | if(!ioc3_submodules[id]->intr(ioc3_submodules[id], |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 427 | idd, pending & ioc3_submodules[id]->irq_mask)) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 428 | pending &= ~ioc3_submodules[id]->irq_mask; |
| 429 | if (ioc3_submodules[id]->reset_mask) |
| 430 | write_ireg(idd, ioc3_submodules[id]->irq_mask, |
| 431 | IOC3_W_IES); |
| 432 | } |
| 433 | } |
| 434 | read_unlock_irqrestore(&ioc3_submodules_lock, flags); |
| 435 | if(pending) { |
| 436 | printk(KERN_WARNING |
| 437 | "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending); |
| 438 | write_ireg(idd, pending, IOC3_W_IEC); |
| 439 | handled = 1; |
| 440 | } |
| 441 | return handled?IRQ_HANDLED:IRQ_NONE; |
| 442 | } |
| 443 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 444 | static irqreturn_t ioc3_intr_eth(int irq, void *arg) |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 445 | { |
| 446 | unsigned long flags; |
| 447 | struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg; |
| 448 | int handled = 1; |
| 449 | |
| 450 | if(!idd->dual_irq) |
| 451 | return IRQ_NONE; |
| 452 | read_lock_irqsave(&ioc3_submodules_lock, flags); |
| 453 | if(ioc3_ethernet && idd->active[ioc3_ethernet->id] |
| 454 | && ioc3_ethernet->intr) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 455 | handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 456 | read_unlock_irqrestore(&ioc3_submodules_lock, flags); |
| 457 | return handled?IRQ_HANDLED:IRQ_NONE; |
| 458 | } |
| 459 | |
| 460 | void ioc3_enable(struct ioc3_submodule *is, |
| 461 | struct ioc3_driver_data *idd, unsigned int irqs) |
| 462 | { |
| 463 | write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES); |
| 464 | } |
| 465 | |
| 466 | void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd, |
| 467 | unsigned int irqs) |
| 468 | { |
| 469 | writel(irqs & is->irq_mask, &idd->vma->sio_ir); |
| 470 | } |
| 471 | |
| 472 | void ioc3_disable(struct ioc3_submodule *is, |
| 473 | struct ioc3_driver_data *idd, unsigned int irqs) |
| 474 | { |
| 475 | write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC); |
| 476 | } |
| 477 | |
| 478 | void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val) |
| 479 | { |
| 480 | unsigned long flags; |
| 481 | spin_lock_irqsave(&idd->gpio_lock, flags); |
| 482 | writel(val, &idd->vma->gpcr_s); |
| 483 | spin_unlock_irqrestore(&idd->gpio_lock, flags); |
| 484 | } |
| 485 | |
| 486 | /* Keep it simple, stupid! */ |
| 487 | static int find_slot(void **tab, int max) |
| 488 | { |
| 489 | int i; |
| 490 | for(i=0;i<max;i++) |
| 491 | if(!(tab[i])) |
| 492 | return i; |
| 493 | return -1; |
| 494 | } |
| 495 | |
| 496 | /* Register an IOC3 submodule */ |
| 497 | int ioc3_register_submodule(struct ioc3_submodule *is) |
| 498 | { |
| 499 | struct ioc3_driver_data *idd; |
| 500 | int alloc_id; |
| 501 | unsigned long flags; |
| 502 | |
| 503 | write_lock_irqsave(&ioc3_submodules_lock, flags); |
| 504 | alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES); |
| 505 | if(alloc_id != -1) { |
| 506 | ioc3_submodules[alloc_id] = is; |
| 507 | if(is->ethernet) { |
| 508 | if(ioc3_ethernet==NULL) |
| 509 | ioc3_ethernet=is; |
| 510 | else |
| 511 | printk(KERN_WARNING |
| 512 | "IOC3 Ethernet module already registered!\n"); |
| 513 | } |
| 514 | } |
| 515 | write_unlock_irqrestore(&ioc3_submodules_lock, flags); |
| 516 | |
| 517 | if(alloc_id == -1) { |
| 518 | printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n"); |
| 519 | return -ENOMEM; |
| 520 | } |
| 521 | |
| 522 | is->id=alloc_id; |
| 523 | |
| 524 | /* Initialize submodule for each IOC3 */ |
| 525 | if (!is->probe) |
| 526 | return 0; |
| 527 | |
| 528 | down_read(&ioc3_devices_rwsem); |
| 529 | list_for_each_entry(idd, &ioc3_devices, list) { |
| 530 | /* set to 1 for IRQs in probe */ |
| 531 | idd->active[alloc_id] = 1; |
| 532 | idd->active[alloc_id] = !is->probe(is, idd); |
| 533 | } |
| 534 | up_read(&ioc3_devices_rwsem); |
| 535 | |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | /* Unregister an IOC3 submodule */ |
| 540 | void ioc3_unregister_submodule(struct ioc3_submodule *is) |
| 541 | { |
| 542 | struct ioc3_driver_data *idd; |
| 543 | unsigned long flags; |
| 544 | |
| 545 | write_lock_irqsave(&ioc3_submodules_lock, flags); |
| 546 | if(ioc3_submodules[is->id]==is) |
| 547 | ioc3_submodules[is->id]=NULL; |
| 548 | else |
| 549 | printk(KERN_WARNING |
| 550 | "IOC3 submodule %s has wrong ID.\n",is->name); |
| 551 | if(ioc3_ethernet==is) |
| 552 | ioc3_ethernet = NULL; |
| 553 | write_unlock_irqrestore(&ioc3_submodules_lock, flags); |
| 554 | |
| 555 | /* Remove submodule for each IOC3 */ |
| 556 | down_read(&ioc3_devices_rwsem); |
| 557 | list_for_each_entry(idd, &ioc3_devices, list) |
| 558 | if(idd->active[is->id]) { |
| 559 | if(is->remove) |
| 560 | if(is->remove(is, idd)) |
| 561 | printk(KERN_WARNING |
| 562 | "%s: IOC3 submodule %s remove failed " |
| 563 | "for pci_dev %s.\n", |
| 564 | __FUNCTION__, module_name(is->owner), |
| 565 | pci_name(idd->pdev)); |
| 566 | idd->active[is->id] = 0; |
| 567 | if(is->irq_mask) |
| 568 | write_ireg(idd, is->irq_mask, IOC3_W_IEC); |
| 569 | } |
| 570 | up_read(&ioc3_devices_rwsem); |
| 571 | } |
| 572 | |
| 573 | /********************* |
| 574 | * Device management * |
| 575 | *********************/ |
| 576 | |
| 577 | static char * |
| 578 | ioc3_class_names[]={"unknown", "IP27 BaseIO", "IP30 system", "MENET 1/2/3", |
| 579 | "MENET 4", "CADduo", "Altix Serial"}; |
| 580 | |
| 581 | static int ioc3_class(struct ioc3_driver_data *idd) |
| 582 | { |
| 583 | int res = IOC3_CLASS_NONE; |
| 584 | /* NIC-based logic */ |
| 585 | if(!strncmp(idd->nic_part, "030-0891-", 9)) |
| 586 | res = IOC3_CLASS_BASE_IP30; |
| 587 | if(!strncmp(idd->nic_part, "030-1155-", 9)) |
| 588 | res = IOC3_CLASS_CADDUO; |
| 589 | if(!strncmp(idd->nic_part, "030-1657-", 9)) |
| 590 | res = IOC3_CLASS_SERIAL; |
| 591 | if(!strncmp(idd->nic_part, "030-1664-", 9)) |
| 592 | res = IOC3_CLASS_SERIAL; |
| 593 | /* total random heuristics */ |
| 594 | #ifdef CONFIG_SGI_IP27 |
| 595 | if(!idd->nic_part[0]) |
| 596 | res = IOC3_CLASS_BASE_IP27; |
| 597 | #endif |
| 598 | /* print educational message */ |
| 599 | printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n", |
| 600 | idd->nic_part, idd->nic_serial, ioc3_class_names[res]); |
| 601 | return res; |
| 602 | } |
| 603 | /* Adds a new instance of an IOC3 card */ |
| 604 | static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id) |
| 605 | { |
| 606 | struct ioc3_driver_data *idd; |
| 607 | uint32_t pcmd; |
| 608 | int ret, id; |
| 609 | |
| 610 | /* Enable IOC3 and take ownership of it */ |
| 611 | if ((ret = pci_enable_device(pdev))) { |
| 612 | printk(KERN_WARNING |
| 613 | "%s: Failed to enable IOC3 device for pci_dev %s.\n", |
| 614 | __FUNCTION__, pci_name(pdev)); |
| 615 | goto out; |
| 616 | } |
| 617 | pci_set_master(pdev); |
| 618 | |
| 619 | #ifdef USE_64BIT_DMA |
Tobias Klauser | 56b146d | 2006-04-10 22:54:21 -0700 | [diff] [blame] | 620 | ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 621 | if (!ret) { |
Tobias Klauser | 56b146d | 2006-04-10 22:54:21 -0700 | [diff] [blame] | 622 | ret = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 623 | if (ret < 0) { |
| 624 | printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA " |
| 625 | "for consistent allocations\n", |
| 626 | __FUNCTION__); |
| 627 | } |
| 628 | } |
| 629 | #endif |
| 630 | |
| 631 | /* Set up per-IOC3 data */ |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 632 | idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 633 | if (!idd) { |
| 634 | printk(KERN_WARNING |
| 635 | "%s: Failed to allocate IOC3 data for pci_dev %s.\n", |
| 636 | __FUNCTION__, pci_name(pdev)); |
| 637 | ret = -ENODEV; |
| 638 | goto out_idd; |
| 639 | } |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 640 | spin_lock_init(&idd->ir_lock); |
| 641 | spin_lock_init(&idd->gpio_lock); |
| 642 | idd->pdev = pdev; |
| 643 | |
| 644 | /* Map all IOC3 registers. These are shared between subdevices |
| 645 | * so the main IOC3 module manages them. |
| 646 | */ |
| 647 | idd->pma = pci_resource_start(pdev, 0); |
| 648 | if (!idd->pma) { |
| 649 | printk(KERN_WARNING |
| 650 | "%s: Unable to find IOC3 resource " |
| 651 | "for pci_dev %s.\n", |
| 652 | __FUNCTION__, pci_name(pdev)); |
| 653 | ret = -ENODEV; |
| 654 | goto out_pci; |
| 655 | } |
Brent Casavant | 52c9ae0 | 2007-02-10 01:44:46 -0800 | [diff] [blame] | 656 | if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) { |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 657 | printk(KERN_WARNING |
| 658 | "%s: Unable to request IOC3 region " |
| 659 | "for pci_dev %s.\n", |
| 660 | __FUNCTION__, pci_name(pdev)); |
| 661 | ret = -ENODEV; |
| 662 | goto out_pci; |
| 663 | } |
| 664 | idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE); |
| 665 | if (!idd->vma) { |
| 666 | printk(KERN_WARNING |
| 667 | "%s: Unable to remap IOC3 region " |
| 668 | "for pci_dev %s.\n", |
| 669 | __FUNCTION__, pci_name(pdev)); |
| 670 | ret = -ENODEV; |
| 671 | goto out_misc_region; |
| 672 | } |
| 673 | |
| 674 | /* Track PCI-device specific data */ |
| 675 | pci_set_drvdata(pdev, idd); |
| 676 | down_write(&ioc3_devices_rwsem); |
Pat Gefre | 2c43630 | 2006-05-01 12:16:08 -0700 | [diff] [blame] | 677 | list_add_tail(&idd->list, &ioc3_devices); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 678 | idd->id = ioc3_counter++; |
| 679 | up_write(&ioc3_devices_rwsem); |
| 680 | |
Al Viro | d656101 | 2006-02-01 05:59:06 -0500 | [diff] [blame] | 681 | idd->gpdr_shadow = readl(&idd->vma->gpdr); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 682 | |
| 683 | /* Read IOC3 NIC contents */ |
| 684 | probe_nic(idd); |
| 685 | |
| 686 | /* Detect IOC3 class */ |
| 687 | idd->class = ioc3_class(idd); |
| 688 | |
| 689 | /* Initialize IOC3 */ |
| 690 | pci_read_config_dword(pdev, PCI_COMMAND, &pcmd); |
| 691 | pci_write_config_dword(pdev, PCI_COMMAND, |
| 692 | pcmd | PCI_COMMAND_MEMORY | |
| 693 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR | |
| 694 | PCI_SCR_DROP_MODE_EN); |
| 695 | |
| 696 | write_ireg(idd, ~0, IOC3_W_IEC); |
| 697 | writel(~0, &idd->vma->sio_ir); |
| 698 | |
| 699 | /* Set up IRQs */ |
| 700 | if(idd->class == IOC3_CLASS_BASE_IP30 |
| 701 | || idd->class == IOC3_CLASS_BASE_IP27) { |
| 702 | writel(0, &idd->vma->eier); |
| 703 | writel(~0, &idd->vma->eisr); |
| 704 | |
| 705 | idd->dual_irq = 1; |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 706 | if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED, |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 707 | "ioc3-eth", (void *)idd)) { |
| 708 | idd->irq_eth = pdev->irq; |
| 709 | } else { |
| 710 | printk(KERN_WARNING |
| 711 | "%s : request_irq fails for IRQ 0x%x\n ", |
| 712 | __FUNCTION__, pdev->irq); |
| 713 | } |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 714 | if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED, |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 715 | "ioc3-io", (void *)idd)) { |
| 716 | idd->irq_io = pdev->irq+2; |
| 717 | } else { |
| 718 | printk(KERN_WARNING |
| 719 | "%s : request_irq fails for IRQ 0x%x\n ", |
| 720 | __FUNCTION__, pdev->irq+2); |
| 721 | } |
| 722 | } else { |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 723 | if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED, |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 724 | "ioc3", (void *)idd)) { |
| 725 | idd->irq_io = pdev->irq; |
| 726 | } else { |
| 727 | printk(KERN_WARNING |
| 728 | "%s : request_irq fails for IRQ 0x%x\n ", |
| 729 | __FUNCTION__, pdev->irq); |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | /* Add this IOC3 to all submodules */ |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 734 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) |
| 735 | if(ioc3_submodules[id] && ioc3_submodules[id]->probe) { |
| 736 | idd->active[id] = 1; |
| 737 | idd->active[id] = !ioc3_submodules[id]->probe |
| 738 | (ioc3_submodules[id], idd); |
| 739 | } |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 740 | |
| 741 | printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev)); |
| 742 | |
| 743 | return 0; |
| 744 | |
| 745 | out_misc_region: |
Brent Casavant | 52c9ae0 | 2007-02-10 01:44:46 -0800 | [diff] [blame] | 746 | release_mem_region(idd->pma, IOC3_PCI_SIZE); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 747 | out_pci: |
| 748 | kfree(idd); |
| 749 | out_idd: |
| 750 | pci_disable_device(pdev); |
| 751 | out: |
| 752 | return ret; |
| 753 | } |
| 754 | |
| 755 | /* Removes a particular instance of an IOC3 card. */ |
| 756 | static void ioc3_remove(struct pci_dev *pdev) |
| 757 | { |
| 758 | int id; |
| 759 | struct ioc3_driver_data *idd; |
| 760 | |
| 761 | idd = pci_get_drvdata(pdev); |
| 762 | |
| 763 | /* Remove this IOC3 from all submodules */ |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 764 | for(id=0;id<IOC3_MAX_SUBMODULES;id++) |
| 765 | if(idd->active[id]) { |
| 766 | if(ioc3_submodules[id] && ioc3_submodules[id]->remove) |
| 767 | if(ioc3_submodules[id]->remove(ioc3_submodules[id], |
| 768 | idd)) |
| 769 | printk(KERN_WARNING |
| 770 | "%s: IOC3 submodule 0x%s remove failed " |
| 771 | "for pci_dev %s.\n", |
| 772 | __FUNCTION__, |
| 773 | module_name(ioc3_submodules[id]->owner), |
| 774 | pci_name(pdev)); |
| 775 | idd->active[id] = 0; |
| 776 | } |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 777 | |
| 778 | /* Clear and disable all IRQs */ |
| 779 | write_ireg(idd, ~0, IOC3_W_IEC); |
| 780 | writel(~0, &idd->vma->sio_ir); |
| 781 | |
| 782 | /* Release resources */ |
| 783 | free_irq(idd->irq_io, (void *)idd); |
| 784 | if(idd->dual_irq) |
| 785 | free_irq(idd->irq_eth, (void *)idd); |
| 786 | iounmap(idd->vma); |
Brent Casavant | 52c9ae0 | 2007-02-10 01:44:46 -0800 | [diff] [blame] | 787 | release_mem_region(idd->pma, IOC3_PCI_SIZE); |
Patrick Gefre | 2d0cfb5 | 2006-01-14 13:20:40 -0800 | [diff] [blame] | 788 | |
| 789 | /* Disable IOC3 and relinquish */ |
| 790 | pci_disable_device(pdev); |
| 791 | |
| 792 | /* Remove and free driver data */ |
| 793 | down_write(&ioc3_devices_rwsem); |
| 794 | list_del(&idd->list); |
| 795 | up_write(&ioc3_devices_rwsem); |
| 796 | kfree(idd); |
| 797 | } |
| 798 | |
| 799 | static struct pci_device_id ioc3_id_table[] = { |
| 800 | {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID}, |
| 801 | {0} |
| 802 | }; |
| 803 | |
| 804 | static struct pci_driver ioc3_driver = { |
| 805 | .name = "IOC3", |
| 806 | .id_table = ioc3_id_table, |
| 807 | .probe = ioc3_probe, |
| 808 | .remove = ioc3_remove, |
| 809 | }; |
| 810 | |
| 811 | MODULE_DEVICE_TABLE(pci, ioc3_id_table); |
| 812 | |
| 813 | /********************* |
| 814 | * Module management * |
| 815 | *********************/ |
| 816 | |
| 817 | /* Module load */ |
| 818 | static int __devinit ioc3_init(void) |
| 819 | { |
| 820 | if (ia64_platform_is("sn2")) |
| 821 | return pci_register_driver(&ioc3_driver); |
| 822 | return 0; |
| 823 | } |
| 824 | |
| 825 | /* Module unload */ |
| 826 | static void __devexit ioc3_exit(void) |
| 827 | { |
| 828 | pci_unregister_driver(&ioc3_driver); |
| 829 | } |
| 830 | |
| 831 | module_init(ioc3_init); |
| 832 | module_exit(ioc3_exit); |
| 833 | |
| 834 | MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>"); |
| 835 | MODULE_DESCRIPTION("PCI driver for SGI IOC3"); |
| 836 | MODULE_LICENSE("GPL"); |
| 837 | |
Pat Gefre | 53d8be5 | 2006-02-01 03:06:41 -0800 | [diff] [blame] | 838 | EXPORT_SYMBOL_GPL(ioc3_register_submodule); |
| 839 | EXPORT_SYMBOL_GPL(ioc3_unregister_submodule); |
| 840 | EXPORT_SYMBOL_GPL(ioc3_ack); |
| 841 | EXPORT_SYMBOL_GPL(ioc3_gpcr_set); |
| 842 | EXPORT_SYMBOL_GPL(ioc3_disable); |
| 843 | EXPORT_SYMBOL_GPL(ioc3_enable); |