cregit-Linux how code gets into the kernel

Release 4.7 drivers/pnp/card.c

Directory: drivers/pnp
/*
 * card.c - contains functions for managing groups of PnP devices
 *
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 */

#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/pnp.h>
#include <linux/dma-mapping.h>
#include "base.h"


LIST_HEAD(pnp_cards);
static 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; }

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static void card_remove(struct pnp_dev *dev) { dev->card_link = NULL; }

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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); }

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adam belayadam belay70100.00%4100.00%
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static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv) { const struct pnp_card_device_id *id; struct pnp_card_link *clink; struct pnp_dev *dev; if (!drv->probe) return 0; id = match_card(drv, card); if (!id) return 0; clink = pnp_alloc(sizeof(*clink)); if (!clink) return 0; clink->card = card; clink->driver = drv; clink->pm_state = PMSG_ON; if (drv->probe(clink, id) >= 0) return 1; /* Recovery */ card_for_each_dev(card, dev) { if (dev->card_link == clink) pnp_release_card_device(dev); } kfree(clink); return 0; }

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Total142100.00%5100.00%

/** * 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 */
static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id) { struct pnp_id *dev_id, *ptr; dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); if (!dev_id) return NULL; dev_id->id[0] = id[0]; dev_id->id[1] = id[1]; dev_id->id[2] = id[2]; dev_id->id[3] = tolower(id[3]); dev_id->id[4] = tolower(id[4]); dev_id->id[5] = tolower(id[5]); dev_id->id[6] = tolower(id[6]); dev_id->id[7] = '\0'; dev_id->next = NULL; ptr = card->id; while (ptr && ptr->next) ptr = ptr->next; if (ptr) ptr->next = dev_id; else card->id = dev_id; return dev_id; }

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adrian bunkadrian bunk10.51%125.00%
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static void pnp_free_card_ids(struct pnp_card *card) { struct pnp_id *id; struct pnp_id *next; id = card->id; while (id) { next = id->next; kfree(id); id = next; } }

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static void pnp_release_card(struct device *dmdev) { struct pnp_card *card = to_pnp_card(dmdev); pnp_free_card_ids(card); kfree(card); }

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struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid) { struct pnp_card *card; struct pnp_id *dev_id; card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL); if (!card) return NULL; card->protocol = protocol; card->number = id; card->dev.parent = &card->protocol->dev; dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number); card->dev.coherent_dma_mask = DMA_BIT_MASK(24); card->dev.dma_mask = &card->dev.coherent_dma_mask; dev_id = pnp_add_card_id(card, pnpid); if (!dev_id) { kfree(card); return NULL; } return card; }

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Total146100.00%4100.00%


static ssize_t pnp_show_card_name(struct device *dmdev, struct device_attribute *attr, char *buf) { char *str = buf; struct pnp_card *card = to_pnp_card(dmdev); str += sprintf(str, "%s\n", card->name); return (str - buf); }

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Total56100.00%2100.00%

static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
static ssize_t pnp_show_card_ids(struct device *dmdev, struct device_attribute *attr, 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); }

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static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
static int pnp_interface_attach_card(struct pnp_card *card) { int rc = device_create_file(&card->dev, &dev_attr_name); if (rc) return rc; rc = device_create_file(&card->dev, &dev_attr_card_id); if (rc) goto err_name; return 0; err_name: device_remove_file(&card->dev, &dev_attr_name); return rc; }

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/** * 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; card->dev.bus = NULL; card->dev.release = &pnp_release_card; error = device_register(&card->dev); if (error) { dev_err(&card->dev, "could not register (err=%d)\n", error); put_device(&card->dev); return error; } pnp_interface_attach_card(card); mutex_lock(&pnp_lock); list_add_tail(&card->global_list, &pnp_cards); list_add_tail(&card->protocol_list, &card->protocol->cards); mutex_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 an unreasonable 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); } return 0; }

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levente kurusalevente kurusa84.44%111.11%
rafael j. wysockirafael j. wysocki21.11%111.11%
Total180100.00%9100.00%

/** * 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; device_unregister(&card->dev); mutex_lock(&pnp_lock); list_del(&card->global_list); list_del(&card->protocol_list); mutex_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); } }

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adam belayadam belay6784.81%250.00%
jaroslav kyselajaroslav kysela1012.66%125.00%
rafael j. wysockirafael j. wysocki22.53%125.00%
Total79100.00%4100.00%

/** * 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) { dev->dev.parent = &card->dev; dev->card_link = NULL; dev_set_name(&dev->dev, "%02x:%02x.%02x", dev->protocol->number, card->number, dev->number); mutex_lock(&pnp_lock); dev->card = card; list_add_tail(&dev->card_list, &card->devices); mutex_unlock(&pnp_lock); return 0; }

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kay sieverskay sievers22.22%120.00%
Total90100.00%5100.00%

/** * pnp_remove_card_device- removes a device from the specified card * @dev: pointer to the device to remove */
void pnp_remove_card_device(struct pnp_dev *dev) { mutex_lock(&pnp_lock); dev->card = NULL; list_del(&dev->card_list); mutex_unlock(&pnp_lock); __pnp_remove_device(dev); }

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adam belayadam belay3892.68%250.00%
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jaroslav kyselajaroslav kysela12.44%125.00%
Total41100.00%4100.00%

/** * pnp_request_card_device - Searches for a PnP device under the specified card * @clink: 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 beginning. */
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) return NULL; card = clink->card; drv = clink->driver; if (!from) { pos = card->devices.next; } else { if (from->card != card) return NULL; 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; } return NULL; found: dev->card_link = clink; dev->dev.driver = &drv->link.driver; if (pnp_bus_type.probe(&dev->dev)) goto err_out; if (device_bind_driver(&dev->dev)) goto err_out; return dev; err_out: dev->dev.driver = NULL; dev->card_link = NULL; return NULL; }

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jaroslav kyselajaroslav kysela31.36%225.00%
Total221100.00%8100.00%

/** * pnp_release_card_device - call this when the driver no longer needs the device * @dev: pointer to the PnP device structure */
void pnp_release_card_device(struct pnp_dev *dev) { struct pnp_card_driver *drv = dev->card_link->driver; drv->link.remove = &card_remove; device_release_driver(&dev->dev); drv->link.remove = &card_remove_first; }

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jaroslav kyselajaroslav kysela1327.66%233.33%
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/* * suspend/resume callbacks */
static int card_suspend(struct pnp_dev *dev, pm_message_t state) { struct pnp_card_link *link = dev->card_link; if (link->pm_state.event == state.event) return 0; link->pm_state = state; return link->driver->suspend(link, state); }

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static int card_resume(struct pnp_dev *dev) { struct pnp_card_link *link = dev->card_link; if (link->pm_state.event == PM_EVENT_ON) return 0; link->pm_state = PMSG_ON; link->driver->resume(link); return 0; }

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/** * 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 error; 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; drv->link.suspend = drv->suspend ? card_suspend : NULL; drv->link.resume = drv->resume ? card_resume : NULL; error = pnp_register_driver(&drv->link); if (error < 0) return error; mutex_lock(&pnp_lock); list_add_tail(&drv->global_list, &pnp_card_drivers); mutex_unlock(&pnp_lock); list_for_each_safe(pos, temp, &pnp_cards) { struct pnp_card *card = list_entry(pos, struct pnp_card, global_list); card_probe(card, drv); } return 0; }

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bjorn helgaasbjorn helgaas52.91%112.50%
jaroslav kyselajaroslav kysela21.16%112.50%
rafael j. wysockirafael j. wysocki21.16%112.50%
Total172100.00%8100.00%

/** * 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) { mutex_lock(&pnp_lock); list_del(&drv->global_list); mutex_unlock(&pnp_lock); pnp_unregister_driver(&drv->link); }

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EXPORT_SYMBOL(pnp_request_card_device); EXPORT_SYMBOL(pnp_release_card_device); EXPORT_SYMBOL(pnp_register_card_driver); EXPORT_SYMBOL(pnp_unregister_card_driver);

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takashi iwaitakashi iwai1426.89%13.03%
jeff garzikjeff garzik633.06%13.03%
jaroslav kyselajaroslav kysela432.09%412.12%
jesper juhljesper juhl331.60%13.03%
rene hermanrene herman231.12%13.03%
rafael j. wysockirafael j. wysocki150.73%13.03%
yani ioannouyani ioannou100.48%13.03%
levente kurusalevente kurusa80.39%13.03%
yang hongyangyang hongyang40.19%13.03%
kay sieverskay sievers40.19%13.03%
adrian bunkadrian bunk20.10%26.06%
lucas de marchilucas de marchi20.10%13.03%
martin waitzmartin waitz10.05%13.03%
Total2062100.00%33100.00%
Directory: drivers/pnp
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