9a08f82b3c
Before a driver is probed, set the function's block size to the default so the driver is sure the block size is something sensible and it needn't explicitly set it. The default block size is the largest that's supported by both the card and the host, with a maximum of 512 to ensure aribitrarily sized transfer use the optimal (least) number of commands. See http://lkml.org/lkml/2007/8/7/150 for reasons for the block size choice. Signed-off-by: David Vrabel <david.vrabel@csr.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
270 lines
5.9 KiB
C
270 lines
5.9 KiB
C
/*
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* linux/drivers/mmc/core/sdio_bus.c
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*
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* Copyright 2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* SDIO function driver model
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/sdio_func.h>
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#include "sdio_cis.h"
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#include "sdio_bus.h"
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#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev)
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#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv)
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/* show configuration fields */
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#define sdio_config_attr(field, format_string) \
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static ssize_t \
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field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct sdio_func *func; \
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\
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func = dev_to_sdio_func (dev); \
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return sprintf (buf, format_string, func->field); \
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}
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sdio_config_attr(class, "0x%02x\n");
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sdio_config_attr(vendor, "0x%04x\n");
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sdio_config_attr(device, "0x%04x\n");
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static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct sdio_func *func = dev_to_sdio_func (dev);
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return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n",
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func->class, func->vendor, func->device);
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}
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static struct device_attribute sdio_dev_attrs[] = {
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__ATTR_RO(class),
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__ATTR_RO(vendor),
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__ATTR_RO(device),
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__ATTR_RO(modalias),
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__ATTR_NULL,
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};
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static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
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const struct sdio_device_id *id)
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{
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if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class)
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return NULL;
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if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor)
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return NULL;
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if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device)
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return NULL;
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return id;
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}
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static const struct sdio_device_id *sdio_match_device(struct sdio_func *func,
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struct sdio_driver *sdrv)
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{
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const struct sdio_device_id *ids;
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ids = sdrv->id_table;
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if (ids) {
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while (ids->class || ids->vendor || ids->device) {
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if (sdio_match_one(func, ids))
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return ids;
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ids++;
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}
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}
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return NULL;
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}
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static int sdio_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct sdio_func *func = dev_to_sdio_func(dev);
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struct sdio_driver *sdrv = to_sdio_driver(drv);
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if (sdio_match_device(func, sdrv))
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return 1;
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return 0;
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}
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static int
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sdio_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
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int buf_size)
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{
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struct sdio_func *func = dev_to_sdio_func(dev);
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int i = 0, length = 0;
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if (add_uevent_var(envp, num_envp, &i,
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buf, buf_size, &length,
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"SDIO_CLASS=%02X", func->class))
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return -ENOMEM;
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if (add_uevent_var(envp, num_envp, &i,
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buf, buf_size, &length,
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"SDIO_ID=%04X:%04X", func->vendor, func->device))
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return -ENOMEM;
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if (add_uevent_var(envp, num_envp, &i,
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buf, buf_size, &length,
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"MODALIAS=sdio:c%02Xv%04Xd%04X",
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func->class, func->vendor, func->device))
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return -ENOMEM;
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envp[i] = NULL;
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return 0;
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}
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static int sdio_bus_probe(struct device *dev)
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{
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struct sdio_driver *drv = to_sdio_driver(dev->driver);
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struct sdio_func *func = dev_to_sdio_func(dev);
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const struct sdio_device_id *id;
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int ret;
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id = sdio_match_device(func, drv);
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if (!id)
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return -ENODEV;
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/* Set the default block size so the driver is sure it's something
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* sensible. */
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sdio_claim_host(func);
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ret = sdio_set_block_size(func, 0);
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sdio_release_host(func);
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if (ret)
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return ret;
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return drv->probe(func, id);
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}
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static int sdio_bus_remove(struct device *dev)
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{
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struct sdio_driver *drv = to_sdio_driver(dev->driver);
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struct sdio_func *func = dev_to_sdio_func(dev);
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drv->remove(func);
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if (func->irq_handler) {
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printk(KERN_WARNING "WARNING: driver %s did not remove "
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"its interrupt handler!\n", drv->name);
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sdio_claim_host(func);
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sdio_release_irq(func);
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sdio_release_host(func);
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}
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return 0;
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}
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static struct bus_type sdio_bus_type = {
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.name = "sdio",
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.dev_attrs = sdio_dev_attrs,
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.match = sdio_bus_match,
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.uevent = sdio_bus_uevent,
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.probe = sdio_bus_probe,
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.remove = sdio_bus_remove,
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};
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int sdio_register_bus(void)
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{
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return bus_register(&sdio_bus_type);
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}
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void sdio_unregister_bus(void)
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{
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bus_unregister(&sdio_bus_type);
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}
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/**
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* sdio_register_driver - register a function driver
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* @drv: SDIO function driver
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*/
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int sdio_register_driver(struct sdio_driver *drv)
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{
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drv->drv.name = drv->name;
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drv->drv.bus = &sdio_bus_type;
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return driver_register(&drv->drv);
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}
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EXPORT_SYMBOL_GPL(sdio_register_driver);
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/**
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* sdio_unregister_driver - unregister a function driver
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* @drv: SDIO function driver
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*/
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void sdio_unregister_driver(struct sdio_driver *drv)
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{
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drv->drv.bus = &sdio_bus_type;
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driver_unregister(&drv->drv);
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}
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EXPORT_SYMBOL_GPL(sdio_unregister_driver);
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static void sdio_release_func(struct device *dev)
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{
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struct sdio_func *func = dev_to_sdio_func(dev);
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sdio_free_func_cis(func);
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kfree(func);
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}
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/*
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* Allocate and initialise a new SDIO function structure.
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*/
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struct sdio_func *sdio_alloc_func(struct mmc_card *card)
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{
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struct sdio_func *func;
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func = kmalloc(sizeof(struct sdio_func), GFP_KERNEL);
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if (!func)
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return ERR_PTR(-ENOMEM);
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memset(func, 0, sizeof(struct sdio_func));
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func->card = card;
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device_initialize(&func->dev);
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func->dev.parent = &card->dev;
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func->dev.bus = &sdio_bus_type;
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func->dev.release = sdio_release_func;
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return func;
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}
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/*
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* Register a new SDIO function with the driver model.
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*/
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int sdio_add_func(struct sdio_func *func)
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{
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int ret;
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snprintf(func->dev.bus_id, sizeof(func->dev.bus_id),
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"%s:%d", mmc_card_id(func->card), func->num);
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ret = device_add(&func->dev);
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if (ret == 0)
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sdio_func_set_present(func);
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return ret;
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}
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/*
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* Unregister a SDIO function with the driver model, and
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* (eventually) free it.
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*/
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void sdio_remove_func(struct sdio_func *func)
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{
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if (sdio_func_present(func))
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device_del(&func->dev);
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put_device(&func->dev);
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}
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