1 files changed, 391 insertions, 0 deletions

diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
new file mode 100644
index 000000000000..97eeecfaef1b
--- /dev/null
+++ b/drivers/pnp/card.c
@@ -0,0 +1,391 @@
+/*
+ * card.c - contains functions for managing groups of PnP devices
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_PNP_DEBUG
+        #define DEBUG
+#else
+        #undef DEBUG
+#endif
+
+#include <linux/pnp.h>
+#include "base.h"
+
+LIST_HEAD(pnp_cards);
+LIST_HEAD(pnp_card_drivers);
+
+
+static const struct pnp_card_device_id * match_card(struct pnp_card_driver * drv, struct pnp_card * card)
+{
+        const struct pnp_card_device_id * drv_id = drv->id_table;
+        while (*drv_id->id){
+                if (compare_pnp_id(card->id,drv_id->id)) {
+                        int i = 0;
+                        for (;;) {
+                                int found;
+                                struct pnp_dev *dev;
+                                if (i == PNP_MAX_DEVICES || ! *drv_id->devs[i].id)
+                                        return drv_id;
+                                found = 0;
+                                card_for_each_dev(card, dev) {
+                                        if (compare_pnp_id(dev->id, drv_id->devs[i].id)) {
+                                                found = 1;
+                                                break;
+                                        }
+                                }
+                                if (! found)
+                                        break;
+                                i++;
+                        }
+                }
+                drv_id++;
+        }
+        return NULL;
+}
+
+static void card_remove(struct pnp_dev * dev)
+{
+        dev->card_link = NULL;
+}
+ 
+static void card_remove_first(struct pnp_dev * dev)
+{
+        struct pnp_card_driver * drv = to_pnp_card_driver(dev->driver);
+        if (!dev->card || !drv)
+                return;
+        if (drv->remove)
+                drv->remove(dev->card_link);
+        drv->link.remove = &card_remove;
+        kfree(dev->card_link);
+        card_remove(dev);
+}
+
+static int card_probe(struct pnp_card * card, struct pnp_card_driver * drv)
+{
+        const struct pnp_card_device_id *id = match_card(drv,card);
+        if (id) {
+                struct pnp_card_link * clink = pnp_alloc(sizeof(struct pnp_card_link));
+                if (!clink)
+                        return 0;
+                clink->card = card;
+                clink->driver = drv;
+                if (drv->probe) {
+                        if (drv->probe(clink, id)>=0)
+                                return 1;
+                        else {
+                                struct pnp_dev * dev;
+                                card_for_each_dev(card, dev) {
+                                        if (dev->card_link == clink)
+                                                pnp_release_card_device(dev);
+                                }
+                                kfree(clink);
+                        }
+                } else
+                        return 1;
+        }
+        return 0;
+}
+
+/**
+ * pnp_add_card_id - adds an EISA id to the specified card
+ * @id: pointer to a pnp_id structure
+ * @card: pointer to the desired card
+ *
+ */
+
+int pnp_add_card_id(struct pnp_id *id, struct pnp_card * card)
+{
+        struct pnp_id * ptr;
+        if (!id)
+                return -EINVAL;
+        if (!card)
+                return -EINVAL;
+        id->next = NULL;
+        ptr = card->id;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = id;
+        else
+                card->id = id;
+        return 0;
+}
+
+static void pnp_free_card_ids(struct pnp_card * card)
+{
+        struct pnp_id * id;
+        struct pnp_id *next;
+        if (!card)
+                return;
+        id = card->id;
+        while (id) {
+                next = id->next;
+                kfree(id);
+                id = next;
+        }
+}
+
+static void pnp_release_card(struct device *dmdev)
+{
+        struct pnp_card * card = to_pnp_card(dmdev);
+        pnp_free_card_ids(card);
+        kfree(card);
+}
+
+
+static ssize_t pnp_show_card_name(struct device *dmdev, char *buf)
+{
+        char *str = buf;
+        struct pnp_card *card = to_pnp_card(dmdev);
+        str += sprintf(str,"%s\n", card->name);
+        return (str - buf);
+}
+
+static DEVICE_ATTR(name,S_IRUGO,pnp_show_card_name,NULL);
+
+static ssize_t pnp_show_card_ids(struct device *dmdev, char *buf)
+{
+        char *str = buf;
+        struct pnp_card *card = to_pnp_card(dmdev);
+        struct pnp_id * pos = card->id;
+
+        while (pos) {
+                str += sprintf(str,"%s\n", pos->id);
+                pos = pos->next;
+        }
+        return (str - buf);
+}
+
+static DEVICE_ATTR(card_id,S_IRUGO,pnp_show_card_ids,NULL);
+
+static int pnp_interface_attach_card(struct pnp_card *card)
+{
+        device_create_file(&card->dev,&dev_attr_name);
+        device_create_file(&card->dev,&dev_attr_card_id);
+        return 0;
+}
+
+/**
+ * pnp_add_card - adds a PnP card to the PnP Layer
+ * @card: pointer to the card to add
+ */
+
+int pnp_add_card(struct pnp_card * card)
+{
+        int error;
+        struct list_head * pos, * temp;
+        if (!card || !card->protocol)
+                return -EINVAL;
+
+        sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, card->number);
+        card->dev.parent = &card->protocol->dev;
+        card->dev.bus = NULL;
+        card->dev.release = &pnp_release_card;
+        error = device_register(&card->dev);
+
+        if (error == 0) {
+                pnp_interface_attach_card(card);
+                spin_lock(&pnp_lock);
+                list_add_tail(&card->global_list, &pnp_cards);
+                list_add_tail(&card->protocol_list, &card->protocol->cards);
+                spin_unlock(&pnp_lock);
+
+                /* we wait until now to add devices in order to ensure the drivers
+                 * will be able to use all of the related devices on the card
+                 * without waiting any unresonable length of time */
+                list_for_each(pos,&card->devices){
+                        struct pnp_dev *dev = card_to_pnp_dev(pos);
+                        __pnp_add_device(dev);
+                }
+
+                /* match with card drivers */
+                list_for_each_safe(pos,temp,&pnp_card_drivers){
+                        struct pnp_card_driver * drv = list_entry(pos, struct pnp_card_driver, global_list);
+                        card_probe(card,drv);
+                }
+        } else
+                pnp_err("sysfs failure, card '%s' will be unavailable", card->dev.bus_id);
+        return error;
+}
+
+/**
+ * pnp_remove_card - removes a PnP card from the PnP Layer
+ * @card: pointer to the card to remove
+ */
+
+void pnp_remove_card(struct pnp_card * card)
+{
+        struct list_head *pos, *temp;
+        if (!card)
+                return;
+        device_unregister(&card->dev);
+        spin_lock(&pnp_lock);
+        list_del(&card->global_list);
+        list_del(&card->protocol_list);
+        spin_unlock(&pnp_lock);
+        list_for_each_safe(pos,temp,&card->devices){
+                struct pnp_dev *dev = card_to_pnp_dev(pos);
+                pnp_remove_card_device(dev);
+        }
+}
+
+/**
+ * pnp_add_card_device - adds a device to the specified card
+ * @card: pointer to the card to add to
+ * @dev: pointer to the device to add
+ */
+
+int pnp_add_card_device(struct pnp_card * card, struct pnp_dev * dev)
+{
+        if (!card || !dev || !dev->protocol)
+                return -EINVAL;
+        dev->dev.parent = &card->dev;
+        dev->card_link = NULL;
+        snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", dev->protocol->number,
+                 card->number,dev->number);
+        spin_lock(&pnp_lock);
+        dev->card = card;
+        list_add_tail(&dev->card_list, &card->devices);
+        spin_unlock(&pnp_lock);
+        return 0;
+}
+
+/**
+ * pnp_remove_card_device- removes a device from the specified card
+ * @card: pointer to the card to remove from
+ * @dev: pointer to the device to remove
+ */
+
+void pnp_remove_card_device(struct pnp_dev * dev)
+{
+        spin_lock(&pnp_lock);
+        dev->card = NULL;
+        list_del(&dev->card_list);
+        spin_unlock(&pnp_lock);
+        __pnp_remove_device(dev);
+}
+
+/**
+ * pnp_request_card_device - Searches for a PnP device under the specified card
+ * @lcard: pointer to the card link, cannot be NULL
+ * @id: pointer to a PnP ID structure that explains the rules for finding the device
+ * @from: Starting place to search from. If NULL it will start from the begining.
+ */
+
+struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from)
+{
+        struct list_head * pos;
+        struct pnp_dev * dev;
+        struct pnp_card_driver * drv;
+        struct pnp_card * card;
+        if (!clink || !id)
+                goto done;
+        card = clink->card;
+        drv = clink->driver;
+        if (!from) {
+                pos = card->devices.next;
+        } else {
+                if (from->card != card)
+                        goto done;
+                pos = from->card_list.next;
+        }
+        while (pos != &card->devices) {
+                dev = card_to_pnp_dev(pos);
+                if ((!dev->card_link) && compare_pnp_id(dev->id,id))
+                        goto found;
+                pos = pos->next;
+        }
+
+done:
+        return NULL;
+
+found:
+        down_write(&dev->dev.bus->subsys.rwsem);
+        dev->card_link = clink;
+        dev->dev.driver = &drv->link.driver;
+        if (drv->link.driver.probe) {
+                if (drv->link.driver.probe(&dev->dev)) {
+                        dev->dev.driver = NULL;
+                        return NULL;
+                }
+        }
+        device_bind_driver(&dev->dev);
+        up_write(&dev->dev.bus->subsys.rwsem);
+
+        return dev;
+}
+
+/**
+ * pnp_release_card_device - call this when the driver no longer needs the device
+ * @dev: pointer to the PnP device stucture
+ */
+
+void pnp_release_card_device(struct pnp_dev * dev)
+{
+        struct pnp_card_driver * drv = dev->card_link->driver;
+        if (!drv)
+                return;
+        down_write(&dev->dev.bus->subsys.rwsem);
+        drv->link.remove = &card_remove;
+        device_release_driver(&dev->dev);
+        drv->link.remove = &card_remove_first;
+        up_write(&dev->dev.bus->subsys.rwsem);
+}
+
+/**
+ * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
+ * @drv: pointer to the driver to register
+ */
+
+int pnp_register_card_driver(struct pnp_card_driver * drv)
+{
+        int count = 0;
+        struct list_head *pos, *temp;
+
+        drv->link.name = drv->name;
+        drv->link.id_table = NULL;      /* this will disable auto matching */
+        drv->link.flags = drv->flags;
+        drv->link.probe = NULL;
+        drv->link.remove = &card_remove_first;
+
+        spin_lock(&pnp_lock);
+        list_add_tail(&drv->global_list, &pnp_card_drivers);
+        spin_unlock(&pnp_lock);
+        pnp_register_driver(&drv->link);
+
+        list_for_each_safe(pos,temp,&pnp_cards){
+                struct pnp_card *card = list_entry(pos, struct pnp_card, global_list);
+                count += card_probe(card,drv);
+        }
+        return count;
+}
+
+/**
+ * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
+ * @drv: pointer to the driver to unregister
+ */
+
+void pnp_unregister_card_driver(struct pnp_card_driver * drv)
+{
+        spin_lock(&pnp_lock);
+        list_del(&drv->global_list);
+        spin_unlock(&pnp_lock);
+        pnp_unregister_driver(&drv->link);
+}
+
+EXPORT_SYMBOL(pnp_add_card);
+EXPORT_SYMBOL(pnp_remove_card);
+EXPORT_SYMBOL(pnp_add_card_device);
+EXPORT_SYMBOL(pnp_remove_card_device);
+EXPORT_SYMBOL(pnp_add_card_id);
+EXPORT_SYMBOL(pnp_request_card_device);
+EXPORT_SYMBOL(pnp_release_card_device);
+EXPORT_SYMBOL(pnp_register_card_driver);
+EXPORT_SYMBOL(pnp_unregister_card_driver);