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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Driver for Intel I82092AA PCI-PCMCIA bridge.4 *5 * (C) 2001 Red Hat, Inc.6 *7 * Author: Arjan Van De Ven <arjanv@redhat.com>8 * Loosly based on i82365.c from the pcmcia-cs package9 */10 11#include <linux/kernel.h>12#include <linux/module.h>13#include <linux/pci.h>14#include <linux/init.h>15#include <linux/workqueue.h>16#include <linux/interrupt.h>17#include <linux/device.h>18 19#include <pcmcia/ss.h>20 21#include <linux/io.h>22 23#include "i82092aa.h"24#include "i82365.h"25 26MODULE_DESCRIPTION("Driver for Intel I82092AA PCI-PCMCIA bridge");27MODULE_LICENSE("GPL");28 29/* PCI core routines */30static const struct pci_device_id i82092aa_pci_ids[] = {31 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },32 { }33};34MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);35 36static struct pci_driver i82092aa_pci_driver = {37 .name = "i82092aa",38 .id_table = i82092aa_pci_ids,39 .probe = i82092aa_pci_probe,40 .remove = i82092aa_pci_remove,41};42 43 44/* the pccard structure and its functions */45static struct pccard_operations i82092aa_operations = {46 .init = i82092aa_init,47 .get_status = i82092aa_get_status,48 .set_socket = i82092aa_set_socket,49 .set_io_map = i82092aa_set_io_map,50 .set_mem_map = i82092aa_set_mem_map,51};52 53/* The card can do up to 4 sockets, allocate a structure for each of them */54 55struct socket_info {56 int number;57 int card_state;58 /* 0 = no socket,59 * 1 = empty socket,60 * 2 = card but not initialized,61 * 3 = operational card62 */63 unsigned int io_base; /* base io address of the socket */64 65 struct pcmcia_socket socket;66 struct pci_dev *dev; /* The PCI device for the socket */67};68 69#define MAX_SOCKETS 470static struct socket_info sockets[MAX_SOCKETS];71static int socket_count; /* shortcut */72 73 74static int i82092aa_pci_probe(struct pci_dev *dev,75 const struct pci_device_id *id)76{77 unsigned char configbyte;78 int i, ret;79 80 ret = pci_enable_device(dev);81 if (ret)82 return ret;83 84 /* PCI Configuration Control */85 pci_read_config_byte(dev, 0x40, &configbyte);86 87 switch (configbyte&6) {88 case 0:89 socket_count = 2;90 break;91 case 2:92 socket_count = 1;93 break;94 case 4:95 case 6:96 socket_count = 4;97 break;98 99 default:100 dev_err(&dev->dev,101 "Oops, you did something we didn't think of.\n");102 ret = -EIO;103 goto err_out_disable;104 }105 dev_info(&dev->dev, "configured as a %d socket device.\n",106 socket_count);107 108 if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {109 ret = -EBUSY;110 goto err_out_disable;111 }112 113 for (i = 0; i < socket_count; i++) {114 sockets[i].card_state = 1; /* 1 = present but empty */115 sockets[i].io_base = pci_resource_start(dev, 0);116 sockets[i].dev = dev;117 sockets[i].socket.features |= SS_CAP_PCCARD;118 sockets[i].socket.map_size = 0x1000;119 sockets[i].socket.irq_mask = 0;120 sockets[i].socket.pci_irq = dev->irq;121 sockets[i].socket.cb_dev = dev;122 sockets[i].socket.owner = THIS_MODULE;123 124 sockets[i].number = i;125 126 if (card_present(i)) {127 sockets[i].card_state = 3;128 dev_dbg(&dev->dev, "slot %i is occupied\n", i);129 } else {130 dev_dbg(&dev->dev, "slot %i is vacant\n", i);131 }132 }133 134 /* Now, specifiy that all interrupts are to be done as PCI interrupts135 * bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt136 */137 configbyte = 0xFF;138 139 /* PCI Interrupt Routing Register */140 pci_write_config_byte(dev, 0x50, configbyte);141 142 /* Register the interrupt handler */143 dev_dbg(&dev->dev, "Requesting interrupt %i\n", dev->irq);144 ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED,145 "i82092aa", i82092aa_interrupt);146 if (ret) {147 dev_err(&dev->dev, "Failed to register IRQ %d, aborting\n",148 dev->irq);149 goto err_out_free_res;150 }151 152 for (i = 0; i < socket_count; i++) {153 sockets[i].socket.dev.parent = &dev->dev;154 sockets[i].socket.ops = &i82092aa_operations;155 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;156 ret = pcmcia_register_socket(&sockets[i].socket);157 if (ret)158 goto err_out_free_sockets;159 }160 161 return 0;162 163err_out_free_sockets:164 if (i) {165 for (i--; i >= 0; i--)166 pcmcia_unregister_socket(&sockets[i].socket);167 }168 free_irq(dev->irq, i82092aa_interrupt);169err_out_free_res:170 release_region(pci_resource_start(dev, 0), 2);171err_out_disable:172 pci_disable_device(dev);173 return ret;174}175 176static void i82092aa_pci_remove(struct pci_dev *dev)177{178 int i;179 180 free_irq(dev->irq, i82092aa_interrupt);181 182 for (i = 0; i < socket_count; i++)183 pcmcia_unregister_socket(&sockets[i].socket);184}185 186static DEFINE_SPINLOCK(port_lock);187 188/* basic value read/write functions */189 190static unsigned char indirect_read(int socket, unsigned short reg)191{192 unsigned short int port;193 unsigned char val;194 unsigned long flags;195 196 spin_lock_irqsave(&port_lock, flags);197 reg += socket * 0x40;198 port = sockets[socket].io_base;199 outb(reg, port);200 val = inb(port+1);201 spin_unlock_irqrestore(&port_lock, flags);202 return val;203}204 205static void indirect_write(int socket, unsigned short reg, unsigned char value)206{207 unsigned short int port;208 unsigned long flags;209 210 spin_lock_irqsave(&port_lock, flags);211 reg = reg + socket * 0x40;212 port = sockets[socket].io_base;213 outb(reg, port);214 outb(value, port+1);215 spin_unlock_irqrestore(&port_lock, flags);216}217 218static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)219{220 unsigned short int port;221 unsigned char val;222 unsigned long flags;223 224 spin_lock_irqsave(&port_lock, flags);225 reg = reg + socket * 0x40;226 port = sockets[socket].io_base;227 outb(reg, port);228 val = inb(port+1);229 val |= mask;230 outb(reg, port);231 outb(val, port+1);232 spin_unlock_irqrestore(&port_lock, flags);233}234 235 236static void indirect_resetbit(int socket,237 unsigned short reg, unsigned char mask)238{239 unsigned short int port;240 unsigned char val;241 unsigned long flags;242 243 spin_lock_irqsave(&port_lock, flags);244 reg = reg + socket * 0x40;245 port = sockets[socket].io_base;246 outb(reg, port);247 val = inb(port+1);248 val &= ~mask;249 outb(reg, port);250 outb(val, port+1);251 spin_unlock_irqrestore(&port_lock, flags);252}253 254static void indirect_write16(int socket,255 unsigned short reg, unsigned short value)256{257 unsigned short int port;258 unsigned char val;259 unsigned long flags;260 261 spin_lock_irqsave(&port_lock, flags);262 reg = reg + socket * 0x40;263 port = sockets[socket].io_base;264 265 outb(reg, port);266 val = value & 255;267 outb(val, port+1);268 269 reg++;270 271 outb(reg, port);272 val = value>>8;273 outb(val, port+1);274 spin_unlock_irqrestore(&port_lock, flags);275}276 277/* simple helper functions */278/* External clock time, in nanoseconds. 120 ns = 8.33 MHz */279static int cycle_time = 120;280 281static int to_cycles(int ns)282{283 if (cycle_time != 0)284 return ns/cycle_time;285 else286 return 0;287}288 289 290/* Interrupt handler functionality */291 292static irqreturn_t i82092aa_interrupt(int irq, void *dev)293{294 int i;295 int loopcount = 0;296 int handled = 0;297 298 unsigned int events, active = 0;299 300 while (1) {301 loopcount++;302 if (loopcount > 20) {303 pr_err("i82092aa: infinite eventloop in interrupt\n");304 break;305 }306 307 active = 0;308 309 for (i = 0; i < socket_count; i++) {310 int csc;311 312 /* Inactive socket, should not happen */313 if (sockets[i].card_state == 0)314 continue;315 316 /* card status change register */317 csc = indirect_read(i, I365_CSC);318 319 if (csc == 0) /* no events on this socket */320 continue;321 handled = 1;322 events = 0;323 324 if (csc & I365_CSC_DETECT) {325 events |= SS_DETECT;326 dev_info(&sockets[i].dev->dev,327 "Card detected in socket %i!\n", i);328 }329 330 if (indirect_read(i, I365_INTCTL) & I365_PC_IOCARD) {331 /* For IO/CARDS, bit 0 means "read the card" */332 if (csc & I365_CSC_STSCHG)333 events |= SS_STSCHG;334 } else {335 /* Check for battery/ready events */336 if (csc & I365_CSC_BVD1)337 events |= SS_BATDEAD;338 if (csc & I365_CSC_BVD2)339 events |= SS_BATWARN;340 if (csc & I365_CSC_READY)341 events |= SS_READY;342 }343 344 if (events)345 pcmcia_parse_events(&sockets[i].socket, events);346 active |= events;347 }348 349 if (active == 0) /* no more events to handle */350 break;351 }352 return IRQ_RETVAL(handled);353}354 355 356 357/* socket functions */358 359static int card_present(int socketno)360{361 unsigned int val;362 363 if ((socketno < 0) || (socketno >= MAX_SOCKETS))364 return 0;365 if (sockets[socketno].io_base == 0)366 return 0;367 368 369 val = indirect_read(socketno, 1); /* Interface status register */370 if ((val&12) == 12)371 return 1;372 373 return 0;374}375 376static void set_bridge_state(int sock)377{378 indirect_write(sock, I365_GBLCTL, 0x00);379 indirect_write(sock, I365_GENCTL, 0x00);380 381 indirect_setbit(sock, I365_INTCTL, 0x08);382}383 384 385static int i82092aa_init(struct pcmcia_socket *sock)386{387 int i;388 struct resource res = { .start = 0, .end = 0x0fff };389 pccard_io_map io = { 0, 0, 0, 0, 1 };390 pccard_mem_map mem = { .res = &res, };391 392 for (i = 0; i < 2; i++) {393 io.map = i;394 i82092aa_set_io_map(sock, &io);395 }396 for (i = 0; i < 5; i++) {397 mem.map = i;398 i82092aa_set_mem_map(sock, &mem);399 }400 401 return 0;402}403 404static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)405{406 unsigned int sock = container_of(socket,407 struct socket_info, socket)->number;408 unsigned int status;409 410 /* Interface Status Register */411 status = indirect_read(sock, I365_STATUS);412 413 *value = 0;414 415 if ((status & I365_CS_DETECT) == I365_CS_DETECT)416 *value |= SS_DETECT;417 418 /* IO cards have a different meaning of bits 0,1 */419 /* Also notice the inverse-logic on the bits */420 if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {421 /* IO card */422 if (!(status & I365_CS_STSCHG))423 *value |= SS_STSCHG;424 } else { /* non I/O card */425 if (!(status & I365_CS_BVD1))426 *value |= SS_BATDEAD;427 if (!(status & I365_CS_BVD2))428 *value |= SS_BATWARN;429 }430 431 if (status & I365_CS_WRPROT)432 (*value) |= SS_WRPROT; /* card is write protected */433 434 if (status & I365_CS_READY)435 (*value) |= SS_READY; /* card is not busy */436 437 if (status & I365_CS_POWERON)438 (*value) |= SS_POWERON; /* power is applied to the card */439 440 return 0;441}442 443 444static int i82092aa_set_socket(struct pcmcia_socket *socket,445 socket_state_t *state)446{447 struct socket_info *sock_info = container_of(socket, struct socket_info,448 socket);449 unsigned int sock = sock_info->number;450 unsigned char reg;451 452 /* First, set the global controller options */453 454 set_bridge_state(sock);455 456 /* Values for the IGENC register */457 458 reg = 0;459 460 /* The reset bit has "inverse" logic */461 if (!(state->flags & SS_RESET))462 reg = reg | I365_PC_RESET;463 if (state->flags & SS_IOCARD)464 reg = reg | I365_PC_IOCARD;465 466 /* IGENC, Interrupt and General Control Register */467 indirect_write(sock, I365_INTCTL, reg);468 469 /* Power registers */470 471 reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */472 473 if (state->flags & SS_PWR_AUTO) {474 dev_info(&sock_info->dev->dev, "Auto power\n");475 reg |= I365_PWR_AUTO; /* automatic power mngmnt */476 }477 if (state->flags & SS_OUTPUT_ENA) {478 dev_info(&sock_info->dev->dev, "Power Enabled\n");479 reg |= I365_PWR_OUT; /* enable power */480 }481 482 switch (state->Vcc) {483 case 0:484 break;485 case 50:486 dev_info(&sock_info->dev->dev,487 "setting voltage to Vcc to 5V on socket %i\n",488 sock);489 reg |= I365_VCC_5V;490 break;491 default:492 dev_err(&sock_info->dev->dev,493 "%s called with invalid VCC power value: %i",494 __func__, state->Vcc);495 return -EINVAL;496 }497 498 switch (state->Vpp) {499 case 0:500 dev_info(&sock_info->dev->dev,501 "not setting Vpp on socket %i\n", sock);502 break;503 case 50:504 dev_info(&sock_info->dev->dev,505 "setting Vpp to 5.0 for socket %i\n", sock);506 reg |= I365_VPP1_5V | I365_VPP2_5V;507 break;508 case 120:509 dev_info(&sock_info->dev->dev, "setting Vpp to 12.0\n");510 reg |= I365_VPP1_12V | I365_VPP2_12V;511 break;512 default:513 dev_err(&sock_info->dev->dev,514 "%s called with invalid VPP power value: %i",515 __func__, state->Vcc);516 return -EINVAL;517 }518 519 if (reg != indirect_read(sock, I365_POWER)) /* only write if changed */520 indirect_write(sock, I365_POWER, reg);521 522 /* Enable specific interrupt events */523 524 reg = 0x00;525 if (state->csc_mask & SS_DETECT)526 reg |= I365_CSC_DETECT;527 if (state->flags & SS_IOCARD) {528 if (state->csc_mask & SS_STSCHG)529 reg |= I365_CSC_STSCHG;530 } else {531 if (state->csc_mask & SS_BATDEAD)532 reg |= I365_CSC_BVD1;533 if (state->csc_mask & SS_BATWARN)534 reg |= I365_CSC_BVD2;535 if (state->csc_mask & SS_READY)536 reg |= I365_CSC_READY;537 538 }539 540 /* now write the value and clear the (probably bogus) pending stuff541 * by doing a dummy read542 */543 544 indirect_write(sock, I365_CSCINT, reg);545 (void)indirect_read(sock, I365_CSC);546 547 return 0;548}549 550static int i82092aa_set_io_map(struct pcmcia_socket *socket,551 struct pccard_io_map *io)552{553 struct socket_info *sock_info = container_of(socket, struct socket_info,554 socket);555 unsigned int sock = sock_info->number;556 unsigned char map, ioctl;557 558 map = io->map;559 560 /* Check error conditions */561 if (map > 1)562 return -EINVAL;563 564 if ((io->start > 0xffff) || (io->stop > 0xffff)565 || (io->stop < io->start))566 return -EINVAL;567 568 /* Turn off the window before changing anything */569 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))570 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));571 572 /* write the new values */573 indirect_write16(sock, I365_IO(map)+I365_W_START, io->start);574 indirect_write16(sock, I365_IO(map)+I365_W_STOP, io->stop);575 576 ioctl = indirect_read(sock, I365_IOCTL) & ~I365_IOCTL_MASK(map);577 578 if (io->flags & (MAP_16BIT|MAP_AUTOSZ))579 ioctl |= I365_IOCTL_16BIT(map);580 581 indirect_write(sock, I365_IOCTL, ioctl);582 583 /* Turn the window back on if needed */584 if (io->flags & MAP_ACTIVE)585 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_IO(map));586 587 return 0;588}589 590static int i82092aa_set_mem_map(struct pcmcia_socket *socket,591 struct pccard_mem_map *mem)592{593 struct socket_info *sock_info = container_of(socket, struct socket_info,594 socket);595 unsigned int sock = sock_info->number;596 struct pci_bus_region region;597 unsigned short base, i;598 unsigned char map;599 600 pcibios_resource_to_bus(sock_info->dev->bus, ®ion, mem->res);601 602 map = mem->map;603 if (map > 4)604 return -EINVAL;605 606 if ((mem->card_start > 0x3ffffff) || (region.start > region.end) ||607 (mem->speed > 1000)) {608 dev_err(&sock_info->dev->dev,609 "invalid mem map for socket %i: %llx to %llx with a start of %x\n",610 sock,611 (unsigned long long)region.start,612 (unsigned long long)region.end,613 mem->card_start);614 return -EINVAL;615 }616 617 /* Turn off the window before changing anything */618 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))619 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));620 621 /* write the start address */622 base = I365_MEM(map);623 i = (region.start >> 12) & 0x0fff;624 if (mem->flags & MAP_16BIT)625 i |= I365_MEM_16BIT;626 if (mem->flags & MAP_0WS)627 i |= I365_MEM_0WS;628 indirect_write16(sock, base+I365_W_START, i);629 630 /* write the stop address */631 632 i = (region.end >> 12) & 0x0fff;633 switch (to_cycles(mem->speed)) {634 case 0:635 break;636 case 1:637 i |= I365_MEM_WS0;638 break;639 case 2:640 i |= I365_MEM_WS1;641 break;642 default:643 i |= I365_MEM_WS1 | I365_MEM_WS0;644 break;645 }646 647 indirect_write16(sock, base+I365_W_STOP, i);648 649 /* card start */650 651 i = ((mem->card_start - region.start) >> 12) & 0x3fff;652 if (mem->flags & MAP_WRPROT)653 i |= I365_MEM_WRPROT;654 if (mem->flags & MAP_ATTRIB)655 i |= I365_MEM_REG;656 indirect_write16(sock, base+I365_W_OFF, i);657 658 /* Enable the window if necessary */659 if (mem->flags & MAP_ACTIVE)660 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));661 662 return 0;663}664 665static int __init i82092aa_module_init(void)666{667 return pci_register_driver(&i82092aa_pci_driver);668}669 670static void __exit i82092aa_module_exit(void)671{672 pci_unregister_driver(&i82092aa_pci_driver);673 if (sockets[0].io_base > 0)674 release_region(sockets[0].io_base, 2);675}676 677module_init(i82092aa_module_init);678module_exit(i82092aa_module_exit);679 680