drivers/pcmcia/pci_socket.c

   1 /*
   2  * Generic PCI pccard driver interface.
   3  *
   4  * (C) Copyright 1999 Linus Torvalds
   5  *
   6  * This implements the common parts of PCI pccard drivers,
   7  * notably detection and infrastructure conversion (ie change
   8  * from socket index to "struct pci_dev" etc)
   9  *
  10  * This does NOT implement the actual low-level driver details,
  11  * and this has on purpose been left generic enough that it can
  12  * be used to set up a PCI PCMCIA controller (ie non-cardbus),
  13  * or to set up a controller.
  14  *
  15  * See for example the "yenta" driver for PCI cardbus controllers
  16  * conforming to the yenta cardbus specifications.
  17  */
  18 #include <linux/module.h>
  19
  20 #include <linux/init.h>
  21 #include <linux/pci.h>
  22 #include <linux/sched.h>
  23 #include <linux/interrupt.h>
  24
  25 #include <pcmcia/ss.h>
  26
  27 #include <asm/io.h>
  28
  29 #include "pci_socket.h"
  30
  31
  32 extern struct socket_info_t *pcmcia_register_socket (int slot,
  33                 struct pccard_operations *vtable, int use_bus_pm);
  34 extern void pcmcia_unregister_socket (struct socket_info_t *socket);
  35 extern void pcmcia_suspend_socket (struct socket_info_t *socket);
  36 extern void pcmcia_resume_socket (struct socket_info_t *socket);
  37
  38
  39 /*
  40  * Arbitrary define. This is the array of active cardbus
  41  * entries.
  42  */
  43 #define MAX_SOCKETS (8)
  44 static pci_socket_t pci_socket_array[MAX_SOCKETS];
  45
  46 static int pci_init_socket(unsigned int sock)
  47 {
  48         pci_socket_t *socket = pci_socket_array + sock;
  49
  50         if (socket->op && socket->op->init)
  51                 return socket->op->init(socket);
  52         return -EINVAL;
  53 }
  54
  55 static int pci_suspend_socket(unsigned int sock)
  56 {
  57         pci_socket_t *socket = pci_socket_array + sock;
  58
  59         if (socket->op && socket->op->suspend)
  60                 return socket->op->suspend(socket);
  61         return -EINVAL;
  62 }
  63
  64 static int pci_register_callback(unsigned int sock, void (*handler)(void *, unsigned int), void * info)
  65 {
  66         pci_socket_t *socket = pci_socket_array + sock;
  67
  68         socket->handler = handler;
  69         socket->info = info;
  70         if (handler)
  71                 MOD_INC_USE_COUNT;
  72         else
  73                 MOD_DEC_USE_COUNT;
  74         return 0;
  75 }
  76
  77 static int pci_inquire_socket(unsigned int sock, socket_cap_t *cap)
  78 {
  79         pci_socket_t *socket = pci_socket_array + sock;
  80
  81         *cap = socket->cap;
  82         return 0;
  83 }
  84
  85 static int pci_get_status(unsigned int sock, unsigned int *value)
  86 {
  87         pci_socket_t *socket = pci_socket_array + sock;
  88
  89         if (socket->op && socket->op->get_status)
  90                 return socket->op->get_status(socket, value);
  91         *value = 0;
  92         return -EINVAL;
  93 }
  94
  95 static int pci_get_socket(unsigned int sock, socket_state_t *state)
  96 {
  97         pci_socket_t *socket = pci_socket_array + sock;
  98
  99         if (socket->op && socket->op->get_socket)
 100                 return socket->op->get_socket(socket, state);
 101         return -EINVAL;
 102 }
 103
 104 static int pci_set_socket(unsigned int sock, socket_state_t *state)
 105 {
 106         pci_socket_t *socket = pci_socket_array + sock;
 107
 108         if (socket->op && socket->op->set_socket)
 109                 return socket->op->set_socket(socket, state);
 110         return -EINVAL;
 111 }
 112
 113 static int pci_get_io_map(unsigned int sock, struct pccard_io_map *io)
 114 {
 115         pci_socket_t *socket = pci_socket_array + sock;
 116
 117         if (socket->op && socket->op->get_io_map)
 118                 return socket->op->get_io_map(socket, io);
 119         return -EINVAL;
 120 }
 121
 122 static int pci_set_io_map(unsigned int sock, struct pccard_io_map *io)
 123 {
 124         pci_socket_t *socket = pci_socket_array + sock;
 125
 126         if (socket->op && socket->op->set_io_map)
 127                 return socket->op->set_io_map(socket, io);
 128         return -EINVAL;
 129 }
 130
 131 static int pci_get_mem_map(unsigned int sock, struct pccard_mem_map *mem)
 132 {
 133         pci_socket_t *socket = pci_socket_array + sock;
 134
 135         if (socket->op && socket->op->get_mem_map)
 136                 return socket->op->get_mem_map(socket, mem);
 137         return -EINVAL;
 138 }
 139
 140 static int pci_set_mem_map(unsigned int sock, struct pccard_mem_map *mem)
 141 {
 142         pci_socket_t *socket = pci_socket_array + sock;
 143
 144         if (socket->op && socket->op->set_mem_map)
 145                 return socket->op->set_mem_map(socket, mem);
 146         return -EINVAL;
 147 }
 148
 149 static void pci_proc_setup(unsigned int sock, struct proc_dir_entry *base)
 150 {
 151         pci_socket_t *socket = pci_socket_array + sock;
 152
 153         if (socket->op && socket->op->proc_setup)
 154                 socket->op->proc_setup(socket, base);
 155 }
 156
 157 static struct pccard_operations pci_socket_operations = {
 158         pci_init_socket,
 159         pci_suspend_socket,
 160         pci_register_callback,
 161         pci_inquire_socket,
 162         pci_get_status,
 163         pci_get_socket,
 164         pci_set_socket,
 165         pci_get_io_map,
 166         pci_set_io_map,
 167         pci_get_mem_map,
 168         pci_set_mem_map,
 169         pci_proc_setup
 170 };
 171
 172 static int __devinit add_pci_socket(int nr, struct pci_dev *dev, struct pci_socket_ops *ops)
 173 {
 174         pci_socket_t *socket = nr + pci_socket_array;
 175
 176         memset(socket, 0, sizeof(*socket));
 177         socket->dev = dev;
 178         socket->op = ops;
 179         dev->driver_data = socket;
 180         spin_lock_init(&socket->event_lock);
 181         return socket->op->open(socket);
 182 }
 183
 184 void cardbus_register(pci_socket_t *socket)
 185 {
 186         int nr = socket - pci_socket_array;
 187
 188         socket->pcmcia_socket = pcmcia_register_socket(nr, &pci_socket_operations, 1);
 189 }
 190
 191 static int __devinit
 192 cardbus_probe (struct pci_dev *dev, const struct pci_device_id *id)
 193 {
 194         int     s;
 195
 196         for (s = 0; s < MAX_SOCKETS; s++) {
 197                 if (pci_socket_array [s].dev == 0) {
 198                         add_pci_socket (s, dev, &yenta_operations);
 199                         return 0;
 200                 }
 201         }
 202         return -ENODEV;
 203 }
 204
 205 static void __devexit cardbus_remove (struct pci_dev *dev)
 206 {
 207         pci_socket_t *socket = (pci_socket_t *) dev->driver_data;
 208
 209         pcmcia_unregister_socket (socket->pcmcia_socket);
 210         if (socket->op && socket->op->close)
 211                 socket->op->close(socket);
 212         dev->driver_data = 0;
 213 }
 214
 215 static void cardbus_suspend (struct pci_dev *dev)
 216 {
 217         pci_socket_t *socket = (pci_socket_t *) dev->driver_data;
 218         pcmcia_suspend_socket (socket->pcmcia_socket);
 219 }
 220
 221 static void cardbus_resume (struct pci_dev *dev)
 222 {
 223         pci_socket_t *socket = (pci_socket_t *) dev->driver_data;
 224         pcmcia_resume_socket (socket->pcmcia_socket);
 225 }
 226
 227
 228 static struct pci_device_id cardbus_table [] __devinitdata = { {
 229         class:          PCI_CLASS_BRIDGE_CARDBUS << 8,
 230         class_mask:     ~0,
 231
 232         vendor:         PCI_ANY_ID,
 233         device:         PCI_ANY_ID,
 234         subvendor:      PCI_ANY_ID,
 235         subdevice:      PCI_ANY_ID,
 236 }, { /* all zeroes */ }
 237 };
 238 MODULE_DEVICE_TABLE(pci, cardbus_table);
 239
 240 static struct pci_driver pci_cardbus_driver = {
 241         name:           "cardbus",
 242         id_table:       cardbus_table,
 243         probe:          cardbus_probe,
 244         remove:         cardbus_remove,
 245         suspend:        cardbus_suspend,
 246         resume:         cardbus_resume,
 247 };
 248
 249 static int __init pci_socket_init(void)
 250 {
 251         return pci_module_init (&pci_cardbus_driver);
 252 }
 253
 254 static void __exit pci_socket_exit (void)
 255 {
 256         pci_unregister_driver (&pci_cardbus_driver);
 257 }
 258
 259 module_init(pci_socket_init);
 260 module_exit(pci_socket_exit);