mount the filesystem. Almost everyone wishing MMC support
should say Y or M here.
+config MMC_BLOCK_BOUNCE
+ bool "Use bounce buffer for simple hosts"
+ depends on MMC_BLOCK
+ default y
+ help
+ SD/MMC is a high latency protocol where it is crucial to
+ send large requests in order to get high performance. Many
+ controllers, however, are restricted to continuous memory
+ (i.e. they can't do scatter-gather), something the kernel
+ rarely can provide.
+
+ Say Y here to help these restricted hosts by bouncing
+ requests back and forth from a large buffer. You will get
+ a big performance gain at the cost of up to 64 KiB of
+ physical memory.
+
+ If unsure, say Y here.
+
}
brq.data.sg = mq->sg;
- brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg);
+ brq.data.sg_len = mmc_queue_map_sg(mq);
+
+ mmc_queue_bounce_pre(mq);
if (brq.data.blocks !=
(req->nr_sectors >> (md->block_bits - 9))) {
}
mmc_wait_for_req(card->host, &brq.mrq);
+
+ mmc_queue_bounce_post(mq);
+
if (brq.cmd.error) {
printk(KERN_ERR "%s: error %d sending read/write command\n",
req->rq_disk->disk_name, brq.cmd.error);
#include <linux/mmc/host.h>
#include "queue.h"
+#define MMC_QUEUE_BOUNCESZ 65536
+
#define MMC_QUEUE_SUSPENDED (1 << 0)
/*
struct mmc_host *host = card->host;
u64 limit = BLK_BOUNCE_HIGH;
int ret;
+ unsigned int bouncesz;
if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
limit = *mmc_dev(host)->dma_mask;
if (!mq->queue)
return -ENOMEM;
- blk_queue_prep_rq(mq->queue, mmc_prep_request);
- blk_queue_bounce_limit(mq->queue, limit);
- blk_queue_max_sectors(mq->queue, host->max_req_size / 512);
- blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
- blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
- blk_queue_max_segment_size(mq->queue, host->max_seg_size);
-
mq->queue->queuedata = mq;
mq->req = NULL;
- mq->sg = kmalloc(sizeof(struct scatterlist) * host->max_phys_segs,
- GFP_KERNEL);
- if (!mq->sg) {
- ret = -ENOMEM;
- goto cleanup_queue;
+ blk_queue_prep_rq(mq->queue, mmc_prep_request);
+
+#ifdef CONFIG_MMC_BLOCK_BOUNCE
+ if (host->max_hw_segs == 1) {
+ bouncesz = MMC_QUEUE_BOUNCESZ;
+
+ if (bouncesz > host->max_req_size)
+ bouncesz = host->max_req_size;
+ if (bouncesz > host->max_seg_size)
+ bouncesz = host->max_seg_size;
+
+ mq->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
+ if (!mq->bounce_buf) {
+ printk(KERN_WARNING "%s: unable to allocate "
+ "bounce buffer\n", mmc_card_name(card));
+ } else {
+ blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH);
+ blk_queue_max_sectors(mq->queue, bouncesz / 512);
+ blk_queue_max_phys_segments(mq->queue, bouncesz / 512);
+ blk_queue_max_hw_segments(mq->queue, bouncesz / 512);
+ blk_queue_max_segment_size(mq->queue, bouncesz);
+
+ mq->sg = kmalloc(sizeof(struct scatterlist),
+ GFP_KERNEL);
+ if (!mq->sg) {
+ ret = -ENOMEM;
+ goto free_bounce_buf;
+ }
+
+ mq->bounce_sg = kmalloc(sizeof(struct scatterlist) *
+ bouncesz / 512, GFP_KERNEL);
+ if (!mq->bounce_sg) {
+ ret = -ENOMEM;
+ goto free_sg;
+ }
+ }
+ }
+#endif
+
+ if (!mq->bounce_buf) {
+ blk_queue_bounce_limit(mq->queue, limit);
+ blk_queue_max_sectors(mq->queue, host->max_req_size / 512);
+ blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
+ blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
+ blk_queue_max_segment_size(mq->queue, host->max_seg_size);
+
+ mq->sg = kmalloc(sizeof(struct scatterlist) *
+ host->max_phys_segs, GFP_KERNEL);
+ if (!mq->sg) {
+ ret = -ENOMEM;
+ goto cleanup_queue;
+ }
}
init_MUTEX(&mq->thread_sem);
mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd");
if (IS_ERR(mq->thread)) {
ret = PTR_ERR(mq->thread);
- goto free_sg;
+ goto free_bounce_sg;
}
return 0;
-
+ free_bounce_sg:
+ if (mq->bounce_sg)
+ kfree(mq->bounce_sg);
+ mq->bounce_sg = NULL;
free_sg:
kfree(mq->sg);
mq->sg = NULL;
+ free_bounce_buf:
+ if (mq->bounce_buf)
+ kfree(mq->bounce_buf);
+ mq->bounce_buf = NULL;
cleanup_queue:
blk_cleanup_queue(mq->queue);
return ret;
/* Then terminate our worker thread */
kthread_stop(mq->thread);
+ if (mq->bounce_sg)
+ kfree(mq->bounce_sg);
+ mq->bounce_sg = NULL;
+
kfree(mq->sg);
mq->sg = NULL;
+ if (mq->bounce_buf)
+ kfree(mq->bounce_buf);
+ mq->bounce_buf = NULL;
+
blk_cleanup_queue(mq->queue);
mq->card = NULL;
}
}
+static void copy_sg(struct scatterlist *dst, unsigned int dst_len,
+ struct scatterlist *src, unsigned int src_len)
+{
+ unsigned int chunk;
+ char *dst_buf, *src_buf;
+ unsigned int dst_size, src_size;
+
+ dst_buf = NULL;
+ src_buf = NULL;
+ dst_size = 0;
+ src_size = 0;
+
+ while (src_len) {
+ BUG_ON(dst_len == 0);
+
+ if (dst_size == 0) {
+ dst_buf = page_address(dst->page) + dst->offset;
+ dst_size = dst->length;
+ }
+
+ if (src_size == 0) {
+ src_buf = page_address(src->page) + src->offset;
+ src_size = src->length;
+ }
+
+ chunk = min(dst_size, src_size);
+
+ memcpy(dst_buf, src_buf, chunk);
+
+ dst_buf += chunk;
+ src_buf += chunk;
+ dst_size -= chunk;
+ src_size -= chunk;
+
+ if (dst_size == 0) {
+ dst++;
+ dst_len--;
+ }
+
+ if (src_size == 0) {
+ src++;
+ src_len--;
+ }
+ }
+}
+
+unsigned int mmc_queue_map_sg(struct mmc_queue *mq)
+{
+ unsigned int sg_len;
+
+ if (!mq->bounce_buf)
+ return blk_rq_map_sg(mq->queue, mq->req, mq->sg);
+
+ BUG_ON(!mq->bounce_sg);
+
+ sg_len = blk_rq_map_sg(mq->queue, mq->req, mq->bounce_sg);
+
+ mq->bounce_sg_len = sg_len;
+
+ /*
+ * Shortcut in the event we only get a single entry.
+ */
+ if (sg_len == 1) {
+ memcpy(mq->sg, mq->bounce_sg, sizeof(struct scatterlist));
+ return 1;
+ }
+
+ mq->sg[0].page = virt_to_page(mq->bounce_buf);
+ mq->sg[0].offset = offset_in_page(mq->bounce_buf);
+ mq->sg[0].length = 0;
+
+ while (sg_len) {
+ mq->sg[0].length += mq->bounce_sg[sg_len - 1].length;
+ sg_len--;
+ }
+
+ return 1;
+}
+
+void mmc_queue_bounce_pre(struct mmc_queue *mq)
+{
+ if (!mq->bounce_buf)
+ return;
+
+ if (mq->bounce_sg_len == 1)
+ return;
+ if (rq_data_dir(mq->req) != WRITE)
+ return;
+
+ copy_sg(mq->sg, 1, mq->bounce_sg, mq->bounce_sg_len);
+}
+
+void mmc_queue_bounce_post(struct mmc_queue *mq)
+{
+ if (!mq->bounce_buf)
+ return;
+
+ if (mq->bounce_sg_len == 1)
+ return;
+ if (rq_data_dir(mq->req) != READ)
+ return;
+
+ copy_sg(mq->bounce_sg, mq->bounce_sg_len, mq->sg, 1);
+}
+
void *data;
struct request_queue *queue;
struct scatterlist *sg;
+ char *bounce_buf;
+ struct scatterlist *bounce_sg;
+ unsigned int bounce_sg_len;
};
extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *);
extern void mmc_queue_suspend(struct mmc_queue *);
extern void mmc_queue_resume(struct mmc_queue *);
+extern unsigned int mmc_queue_map_sg(struct mmc_queue *);
+extern void mmc_queue_bounce_pre(struct mmc_queue *);
+extern void mmc_queue_bounce_post(struct mmc_queue *);
+
#endif
endif
obj-$(CONFIG_MMC) += mmc_core.o
-mmc_core-y := core.o sysfs.o mmc.o mmc_ops.o sd.o sd_ops.o
+mmc_core-y := core.o sysfs.o bus.o host.o \
+ mmc.o mmc_ops.o sd.o sd_ops.o
--- /dev/null
+/*
+ * linux/drivers/mmc/core/bus.c
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright (C) 2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * MMC card bus driver model
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "sysfs.h"
+#include "core.h"
+#include "bus.h"
+
+#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
+#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
+
+static ssize_t mmc_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ return sprintf(buf, "MMC\n");
+ case MMC_TYPE_SD:
+ return sprintf(buf, "SD\n");
+ default:
+ return -EFAULT;
+ }
+}
+
+static struct device_attribute mmc_dev_attrs[] = {
+ MMC_ATTR_RO(type),
+ __ATTR_NULL,
+};
+
+/*
+ * This currently matches any MMC driver to any MMC card - drivers
+ * themselves make the decision whether to drive this card in their
+ * probe method.
+ */
+static int mmc_bus_match(struct device *dev, struct device_driver *drv)
+{
+ return 1;
+}
+
+static int
+mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
+ int buf_size)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ int retval = 0, i = 0, length = 0;
+
+#define add_env(fmt,val) do { \
+ retval = add_uevent_var(envp, num_envp, &i, \
+ buf, buf_size, &length, \
+ fmt, val); \
+ if (retval) \
+ return retval; \
+} while (0);
+
+ switch (card->type) {
+ case MMC_TYPE_MMC:
+ add_env("MMC_TYPE=%s", "MMC");
+ break;
+ case MMC_TYPE_SD:
+ add_env("MMC_TYPE=%s", "SD");
+ break;
+ }
+
+ add_env("MMC_NAME=%s", mmc_card_name(card));
+
+#undef add_env
+
+ envp[i] = NULL;
+
+ return 0;
+}
+
+static int mmc_bus_probe(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ return drv->probe(card);
+}
+
+static int mmc_bus_remove(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ drv->remove(card);
+
+ return 0;
+}
+
+static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ int ret = 0;
+
+ if (dev->driver && drv->suspend)
+ ret = drv->suspend(card, state);
+ return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ int ret = 0;
+
+ if (dev->driver && drv->resume)
+ ret = drv->resume(card);
+ return ret;
+}
+
+static struct bus_type mmc_bus_type = {
+ .name = "mmc",
+ .dev_attrs = mmc_dev_attrs,
+ .match = mmc_bus_match,
+ .uevent = mmc_bus_uevent,
+ .probe = mmc_bus_probe,
+ .remove = mmc_bus_remove,
+ .suspend = mmc_bus_suspend,
+ .resume = mmc_bus_resume,
+};
+
+int mmc_register_bus(void)
+{
+ return bus_register(&mmc_bus_type);
+}
+
+void mmc_unregister_bus(void)
+{
+ bus_unregister(&mmc_bus_type);
+}
+
+/**
+ * mmc_register_driver - register a media driver
+ * @drv: MMC media driver
+ */
+int mmc_register_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ return driver_register(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_register_driver);
+
+/**
+ * mmc_unregister_driver - unregister a media driver
+ * @drv: MMC media driver
+ */
+void mmc_unregister_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ driver_unregister(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_unregister_driver);
+
+static void mmc_release_card(struct device *dev)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ kfree(card);
+}
+
+/*
+ * Allocate and initialise a new MMC card structure.
+ */
+struct mmc_card *mmc_alloc_card(struct mmc_host *host)
+{
+ struct mmc_card *card;
+
+ card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL);
+ if (!card)
+ return ERR_PTR(-ENOMEM);
+
+ memset(card, 0, sizeof(struct mmc_card));
+
+ card->host = host;
+
+ device_initialize(&card->dev);
+
+ card->dev.parent = mmc_classdev(host);
+ card->dev.bus = &mmc_bus_type;
+ card->dev.release = mmc_release_card;
+
+ return card;
+}
+
+/*
+ * Register a new MMC card with the driver model.
+ */
+int mmc_add_card(struct mmc_card *card)
+{
+ int ret;
+
+ snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
+ "%s:%04x", mmc_hostname(card->host), card->rca);
+
+ card->dev.uevent_suppress = 1;
+
+ ret = device_add(&card->dev);
+ if (ret)
+ return ret;
+
+ if (card->host->bus_ops->sysfs_add) {
+ ret = card->host->bus_ops->sysfs_add(card->host, card);
+ if (ret) {
+ device_del(&card->dev);
+ return ret;
+ }
+ }
+
+ card->dev.uevent_suppress = 0;
+
+ kobject_uevent(&card->dev.kobj, KOBJ_ADD);
+
+ mmc_card_set_present(card);
+
+ return 0;
+}
+
+/*
+ * Unregister a new MMC card with the driver model, and
+ * (eventually) free it.
+ */
+void mmc_remove_card(struct mmc_card *card)
+{
+ if (mmc_card_present(card)) {
+ if (card->host->bus_ops->sysfs_remove)
+ card->host->bus_ops->sysfs_remove(card->host, card);
+ device_del(&card->dev);
+ }
+
+ put_device(&card->dev);
+}
+
--- /dev/null
+/*
+ * linux/drivers/mmc/core/bus.h
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright 2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _MMC_CORE_BUS_H
+#define _MMC_CORE_BUS_H
+
+struct mmc_card *mmc_alloc_card(struct mmc_host *host);
+int mmc_add_card(struct mmc_card *card);
+void mmc_remove_card(struct mmc_card *card);
+
+int mmc_register_bus(void);
+void mmc_unregister_bus(void);
+
+#endif
+
#include <linux/mmc/sd.h>
#include "core.h"
-#include "sysfs.h"
+#include "bus.h"
+#include "host.h"
#include "mmc_ops.h"
#include "sd_ops.h"
extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr);
extern int mmc_attach_sd(struct mmc_host *host, u32 ocr);
+static struct workqueue_struct *workqueue;
+
+/*
+ * Internal function. Schedule delayed work in the MMC work queue.
+ */
+static int mmc_schedule_delayed_work(struct delayed_work *work,
+ unsigned long delay)
+{
+ return queue_delayed_work(workqueue, work, delay);
+}
+
+/*
+ * Internal function. Flush all scheduled work from the MMC work queue.
+ */
+static void mmc_flush_scheduled_work(void)
+{
+ flush_workqueue(workqueue);
+}
+
/**
* mmc_request_done - finish processing an MMC request
* @host: MMC host which completed request
mmc_set_ios(host);
}
-/*
- * Allocate a new MMC card
- */
-struct mmc_card *mmc_alloc_card(struct mmc_host *host)
-{
- struct mmc_card *card;
-
- card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL);
- if (!card)
- return ERR_PTR(-ENOMEM);
-
- mmc_init_card(card, host);
-
- return card;
-}
-
/*
* Apply power to the MMC stack. This is a two-stage process.
* First, we enable power to the card without the clock running.
EXPORT_SYMBOL(mmc_detect_change);
-static void mmc_rescan(struct work_struct *work)
+void mmc_rescan(struct work_struct *work)
{
struct mmc_host *host =
container_of(work, struct mmc_host, detect.work);
}
}
-
-/**
- * mmc_alloc_host - initialise the per-host structure.
- * @extra: sizeof private data structure
- * @dev: pointer to host device model structure
- *
- * Initialise the per-host structure.
- */
-struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+void mmc_start_host(struct mmc_host *host)
{
- struct mmc_host *host;
-
- host = mmc_alloc_host_sysfs(extra, dev);
- if (host) {
- spin_lock_init(&host->lock);
- init_waitqueue_head(&host->wq);
- INIT_DELAYED_WORK(&host->detect, mmc_rescan);
-
- /*
- * By default, hosts do not support SGIO or large requests.
- * They have to set these according to their abilities.
- */
- host->max_hw_segs = 1;
- host->max_phys_segs = 1;
- host->max_seg_size = PAGE_CACHE_SIZE;
-
- host->max_req_size = PAGE_CACHE_SIZE;
- host->max_blk_size = 512;
- host->max_blk_count = PAGE_CACHE_SIZE / 512;
- }
-
- return host;
-}
-
-EXPORT_SYMBOL(mmc_alloc_host);
-
-/**
- * mmc_add_host - initialise host hardware
- * @host: mmc host
- */
-int mmc_add_host(struct mmc_host *host)
-{
- int ret;
-
- ret = mmc_add_host_sysfs(host);
- if (ret == 0) {
- mmc_power_off(host);
- mmc_detect_change(host, 0);
- }
-
- return ret;
+ mmc_power_off(host);
+ mmc_detect_change(host, 0);
}
-EXPORT_SYMBOL(mmc_add_host);
-
-/**
- * mmc_remove_host - remove host hardware
- * @host: mmc host
- *
- * Unregister and remove all cards associated with this host,
- * and power down the MMC bus.
- */
-void mmc_remove_host(struct mmc_host *host)
+void mmc_stop_host(struct mmc_host *host)
{
#ifdef CONFIG_MMC_DEBUG
unsigned long flags;
BUG_ON(host->card);
mmc_power_off(host);
- mmc_remove_host_sysfs(host);
}
-EXPORT_SYMBOL(mmc_remove_host);
-
-/**
- * mmc_free_host - free the host structure
- * @host: mmc host
- *
- * Free the host once all references to it have been dropped.
- */
-void mmc_free_host(struct mmc_host *host)
-{
- mmc_free_host_sysfs(host);
-}
-
-EXPORT_SYMBOL(mmc_free_host);
-
#ifdef CONFIG_PM
/**
#endif
+static int __init mmc_init(void)
+{
+ int ret;
+
+ workqueue = create_singlethread_workqueue("kmmcd");
+ if (!workqueue)
+ return -ENOMEM;
+
+ ret = mmc_register_bus();
+ if (ret == 0) {
+ ret = mmc_register_host_class();
+ if (ret)
+ mmc_unregister_bus();
+ }
+ return ret;
+}
+
+static void __exit mmc_exit(void)
+{
+ mmc_unregister_host_class();
+ mmc_unregister_bus();
+ destroy_workqueue(workqueue);
+}
+
+module_init(mmc_init);
+module_exit(mmc_exit);
+
MODULE_LICENSE("GPL");
struct mmc_bus_ops {
void (*remove)(struct mmc_host *);
void (*detect)(struct mmc_host *);
+ int (*sysfs_add)(struct mmc_host *, struct mmc_card *card);
+ void (*sysfs_remove)(struct mmc_host *, struct mmc_card *card);
void (*suspend)(struct mmc_host *);
void (*resume)(struct mmc_host *);
};
u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
void mmc_set_timing(struct mmc_host *host, unsigned int timing);
-struct mmc_card *mmc_alloc_card(struct mmc_host *host);
-
static inline void mmc_delay(unsigned int ms)
{
if (ms < 1000 / HZ) {
}
}
+void mmc_rescan(struct work_struct *work);
+void mmc_start_host(struct mmc_host *host);
+void mmc_stop_host(struct mmc_host *host);
+
#endif
--- /dev/null
+/*
+ * linux/drivers/mmc/core/host.c
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright (C) 2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * MMC host class device management
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/idr.h>
+#include <linux/pagemap.h>
+
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "host.h"
+
+#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
+
+static void mmc_host_classdev_release(struct device *dev)
+{
+ struct mmc_host *host = cls_dev_to_mmc_host(dev);
+ kfree(host);
+}
+
+static struct class mmc_host_class = {
+ .name = "mmc_host",
+ .dev_release = mmc_host_classdev_release,
+};
+
+int mmc_register_host_class(void)
+{
+ return class_register(&mmc_host_class);
+}
+
+void mmc_unregister_host_class(void)
+{
+ class_unregister(&mmc_host_class);
+}
+
+static DEFINE_IDR(mmc_host_idr);
+static DEFINE_SPINLOCK(mmc_host_lock);
+
+/**
+ * mmc_alloc_host - initialise the per-host structure.
+ * @extra: sizeof private data structure
+ * @dev: pointer to host device model structure
+ *
+ * Initialise the per-host structure.
+ */
+struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+{
+ struct mmc_host *host;
+
+ host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+ if (!host)
+ return NULL;
+
+ memset(host, 0, sizeof(struct mmc_host) + extra);
+
+ host->parent = dev;
+ host->class_dev.parent = dev;
+ host->class_dev.class = &mmc_host_class;
+ device_initialize(&host->class_dev);
+
+ spin_lock_init(&host->lock);
+ init_waitqueue_head(&host->wq);
+ INIT_DELAYED_WORK(&host->detect, mmc_rescan);
+
+ /*
+ * By default, hosts do not support SGIO or large requests.
+ * They have to set these according to their abilities.
+ */
+ host->max_hw_segs = 1;
+ host->max_phys_segs = 1;
+ host->max_seg_size = PAGE_CACHE_SIZE;
+
+ host->max_req_size = PAGE_CACHE_SIZE;
+ host->max_blk_size = 512;
+ host->max_blk_count = PAGE_CACHE_SIZE / 512;
+
+ return host;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+/**
+ * mmc_add_host - initialise host hardware
+ * @host: mmc host
+ */
+int mmc_add_host(struct mmc_host *host)
+{
+ int err;
+
+ if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
+ return -ENOMEM;
+
+ spin_lock(&mmc_host_lock);
+ err = idr_get_new(&mmc_host_idr, host, &host->index);
+ spin_unlock(&mmc_host_lock);
+ if (err)
+ return err;
+
+ snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
+ "mmc%d", host->index);
+
+ err = device_add(&host->class_dev);
+ if (err)
+ return err;
+
+ mmc_start_host(host);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(mmc_add_host);
+
+/**
+ * mmc_remove_host - remove host hardware
+ * @host: mmc host
+ *
+ * Unregister and remove all cards associated with this host,
+ * and power down the MMC bus.
+ */
+void mmc_remove_host(struct mmc_host *host)
+{
+ mmc_stop_host(host);
+
+ device_del(&host->class_dev);
+
+ spin_lock(&mmc_host_lock);
+ idr_remove(&mmc_host_idr, host->index);
+ spin_unlock(&mmc_host_lock);
+}
+
+EXPORT_SYMBOL(mmc_remove_host);
+
+/**
+ * mmc_free_host - free the host structure
+ * @host: mmc host
+ *
+ * Free the host once all references to it have been dropped.
+ */
+void mmc_free_host(struct mmc_host *host)
+{
+ put_device(&host->class_dev);
+}
+
+EXPORT_SYMBOL(mmc_free_host);
+
--- /dev/null
+/*
+ * linux/drivers/mmc/core/host.h
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright 2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _MMC_CORE_HOST_H
+#define _MMC_CORE_HOST_H
+
+int mmc_register_host_class(void);
+void mmc_unregister_host_class(void);
+
+#endif
+
#include "core.h"
#include "sysfs.h"
+#include "bus.h"
#include "mmc_ops.h"
static const unsigned int tran_exp[] = {
* In the case of a resume, "curcard" will contain the card
* we're trying to reinitialise.
*/
-static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
+static int mmc_init_card(struct mmc_host *host, u32 ocr,
struct mmc_card *oldcard)
{
struct mmc_card *card;
mmc_release_host(host);
if (err != MMC_ERR_NONE) {
- mmc_remove_card(host->card);
- host->card = NULL;
+ mmc_remove(host);
mmc_claim_host(host);
mmc_detach_bus(host);
}
}
+MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+ card->raw_cid[2], card->raw_cid[3]);
+MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+ card->raw_csd[2], card->raw_csd[3]);
+MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid);
+MMC_ATTR_FN(name, "%s\n", card->cid.prod_name);
+MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid);
+MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial);
+
+static struct device_attribute mmc_dev_attrs[] = {
+ MMC_ATTR_RO(cid),
+ MMC_ATTR_RO(csd),
+ MMC_ATTR_RO(date),
+ MMC_ATTR_RO(fwrev),
+ MMC_ATTR_RO(hwrev),
+ MMC_ATTR_RO(manfid),
+ MMC_ATTR_RO(name),
+ MMC_ATTR_RO(oemid),
+ MMC_ATTR_RO(serial),
+ __ATTR_NULL,
+};
+
+/*
+ * Adds sysfs entries as relevant.
+ */
+static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card)
+{
+ int ret;
+
+ ret = mmc_add_attrs(card, mmc_dev_attrs);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Removes the sysfs entries added by mmc_sysfs_add().
+ */
+static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card)
+{
+ mmc_remove_attrs(card, mmc_dev_attrs);
+}
+
#ifdef CONFIG_MMC_UNSAFE_RESUME
/*
mmc_claim_host(host);
- err = mmc_sd_init_card(host, host->ocr, host->card);
+ err = mmc_init_card(host, host->ocr, host->card);
if (err != MMC_ERR_NONE) {
- mmc_remove_card(host->card);
- host->card = NULL;
-
+ mmc_remove(host);
mmc_detach_bus(host);
}
static const struct mmc_bus_ops mmc_ops = {
.remove = mmc_remove,
.detect = mmc_detect,
+ .sysfs_add = mmc_sysfs_add,
+ .sysfs_remove = mmc_sysfs_remove,
.suspend = mmc_suspend,
.resume = mmc_resume,
};
/*
* Detect and init the card.
*/
- err = mmc_sd_init_card(host, host->ocr, NULL);
+ err = mmc_init_card(host, host->ocr, NULL);
if (err != MMC_ERR_NONE)
goto err;
mmc_release_host(host);
- err = mmc_register_card(host->card);
+ err = mmc_add_card(host->card);
if (err)
goto reclaim_host;
#include "core.h"
#include "sysfs.h"
+#include "bus.h"
#include "mmc_ops.h"
#include "sd_ops.h"
-#include "core.h"
-
static const unsigned int tran_exp[] = {
10000, 100000, 1000000, 10000000,
0, 0, 0, 0
mmc_release_host(host);
if (err != MMC_ERR_NONE) {
- mmc_remove_card(host->card);
- host->card = NULL;
+ mmc_sd_remove(host);
mmc_claim_host(host);
mmc_detach_bus(host);
}
}
+MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+ card->raw_cid[2], card->raw_cid[3]);
+MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+ card->raw_csd[2], card->raw_csd[3]);
+MMC_ATTR_FN(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
+MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid);
+MMC_ATTR_FN(name, "%s\n", card->cid.prod_name);
+MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid);
+MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial);
+
+static struct device_attribute mmc_sd_dev_attrs[] = {
+ MMC_ATTR_RO(cid),
+ MMC_ATTR_RO(csd),
+ MMC_ATTR_RO(scr),
+ MMC_ATTR_RO(date),
+ MMC_ATTR_RO(fwrev),
+ MMC_ATTR_RO(hwrev),
+ MMC_ATTR_RO(manfid),
+ MMC_ATTR_RO(name),
+ MMC_ATTR_RO(oemid),
+ MMC_ATTR_RO(serial),
+ __ATTR_NULL,
+};
+
+/*
+ * Adds sysfs entries as relevant.
+ */
+static int mmc_sd_sysfs_add(struct mmc_host *host, struct mmc_card *card)
+{
+ int ret;
+
+ ret = mmc_add_attrs(card, mmc_sd_dev_attrs);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * Removes the sysfs entries added by mmc_sysfs_add().
+ */
+static void mmc_sd_sysfs_remove(struct mmc_host *host, struct mmc_card *card)
+{
+ mmc_remove_attrs(card, mmc_sd_dev_attrs);
+}
+
#ifdef CONFIG_MMC_UNSAFE_RESUME
/*
err = mmc_sd_init_card(host, host->ocr, host->card);
if (err != MMC_ERR_NONE) {
- mmc_remove_card(host->card);
- host->card = NULL;
-
+ mmc_sd_remove(host);
mmc_detach_bus(host);
}
static const struct mmc_bus_ops mmc_sd_ops = {
.remove = mmc_sd_remove,
.detect = mmc_sd_detect,
+ .sysfs_add = mmc_sd_sysfs_add,
+ .sysfs_remove = mmc_sd_sysfs_remove,
.suspend = mmc_sd_suspend,
.resume = mmc_sd_resume,
};
mmc_release_host(host);
- err = mmc_register_card(host->card);
+ err = mmc_add_card(host->card);
if (err)
goto reclaim_host;
* linux/drivers/mmc/core/sysfs.c
*
* Copyright (C) 2003 Russell King, All Rights Reserved.
+ * Copyright 2007 Pierre Ossman
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
*
* MMC sysfs/driver model support.
*/
-#include <linux/module.h>
-#include <linux/init.h>
#include <linux/device.h>
-#include <linux/idr.h>
-#include <linux/workqueue.h>
#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
#include "sysfs.h"
-#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
-#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
-#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
-
-#define MMC_ATTR(name, fmt, args...) \
-static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- struct mmc_card *card = dev_to_mmc_card(dev); \
- return sprintf(buf, fmt, args); \
-}
-
-MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
- card->raw_cid[2], card->raw_cid[3]);
-MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
- card->raw_csd[2], card->raw_csd[3]);
-MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
-MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
-MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
-MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
-MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
-MMC_ATTR(name, "%s\n", card->cid.prod_name);
-MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
-MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
-
-#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
-
-static struct device_attribute mmc_dev_attrs[] = {
- MMC_ATTR_RO(cid),
- MMC_ATTR_RO(csd),
- MMC_ATTR_RO(date),
- MMC_ATTR_RO(fwrev),
- MMC_ATTR_RO(hwrev),
- MMC_ATTR_RO(manfid),
- MMC_ATTR_RO(name),
- MMC_ATTR_RO(oemid),
- MMC_ATTR_RO(serial),
- __ATTR_NULL
-};
-
-static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
-
-
-static void mmc_release_card(struct device *dev)
-{
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- kfree(card);
-}
-
-/*
- * This currently matches any MMC driver to any MMC card - drivers
- * themselves make the decision whether to drive this card in their
- * probe method.
- */
-static int mmc_bus_match(struct device *dev, struct device_driver *drv)
-{
- return 1;
-}
-
-static int
-mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
- int buf_size)
-{
- struct mmc_card *card = dev_to_mmc_card(dev);
- char ccc[13];
- int retval = 0, i = 0, length = 0;
-
-#define add_env(fmt,val) do { \
- retval = add_uevent_var(envp, num_envp, &i, \
- buf, buf_size, &length, \
- fmt, val); \
- if (retval) \
- return retval; \
-} while (0);
-
- for (i = 0; i < 12; i++)
- ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
- ccc[12] = '\0';
-
- add_env("MMC_CCC=%s", ccc);
- add_env("MMC_MANFID=%06x", card->cid.manfid);
- add_env("MMC_NAME=%s", mmc_card_name(card));
- add_env("MMC_OEMID=%04x", card->cid.oemid);
-#undef add_env
- envp[i] = NULL;
-
- return 0;
-}
-
-static int mmc_bus_suspend(struct device *dev, pm_message_t state)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
-
- if (dev->driver && drv->suspend)
- ret = drv->suspend(card, state);
- return ret;
-}
-
-static int mmc_bus_resume(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
-
- if (dev->driver && drv->resume)
- ret = drv->resume(card);
- return ret;
-}
-
-static int mmc_bus_probe(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- return drv->probe(card);
-}
-
-static int mmc_bus_remove(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- drv->remove(card);
-
- return 0;
-}
-
-static struct bus_type mmc_bus_type = {
- .name = "mmc",
- .dev_attrs = mmc_dev_attrs,
- .match = mmc_bus_match,
- .uevent = mmc_bus_uevent,
- .probe = mmc_bus_probe,
- .remove = mmc_bus_remove,
- .suspend = mmc_bus_suspend,
- .resume = mmc_bus_resume,
-};
-
-/**
- * mmc_register_driver - register a media driver
- * @drv: MMC media driver
- */
-int mmc_register_driver(struct mmc_driver *drv)
-{
- drv->drv.bus = &mmc_bus_type;
- return driver_register(&drv->drv);
-}
-
-EXPORT_SYMBOL(mmc_register_driver);
-
-/**
- * mmc_unregister_driver - unregister a media driver
- * @drv: MMC media driver
- */
-void mmc_unregister_driver(struct mmc_driver *drv)
-{
- drv->drv.bus = &mmc_bus_type;
- driver_unregister(&drv->drv);
-}
-
-EXPORT_SYMBOL(mmc_unregister_driver);
-
-
-/*
- * Internal function. Initialise a MMC card structure.
- */
-void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
-{
- memset(card, 0, sizeof(struct mmc_card));
- card->host = host;
- device_initialize(&card->dev);
- card->dev.parent = mmc_classdev(host);
- card->dev.bus = &mmc_bus_type;
- card->dev.release = mmc_release_card;
-}
-
-/*
- * Internal function. Register a new MMC card with the driver model.
- */
-int mmc_register_card(struct mmc_card *card)
+int mmc_add_attrs(struct mmc_card *card, struct device_attribute *attrs)
{
- int ret;
+ int error = 0;
+ int i;
- snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
- "%s:%04x", mmc_hostname(card->host), card->rca);
-
- ret = device_add(&card->dev);
- if (ret == 0) {
- if (mmc_card_sd(card)) {
- ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
- if (ret)
- device_del(&card->dev);
+ for (i = 0; attr_name(attrs[i]); i++) {
+ error = device_create_file(&card->dev, &attrs[i]);
+ if (error) {
+ while (--i >= 0)
+ device_remove_file(&card->dev, &attrs[i]);
+ break;
}
}
- if (ret == 0)
- mmc_card_set_present(card);
- return ret;
-}
-
-/*
- * Internal function. Unregister a new MMC card with the
- * driver model, and (eventually) free it.
- */
-void mmc_remove_card(struct mmc_card *card)
-{
- if (mmc_card_present(card)) {
- if (mmc_card_sd(card))
- device_remove_file(&card->dev, &mmc_dev_attr_scr);
-
- device_del(&card->dev);
- }
-
- put_device(&card->dev);
-}
-
-
-static void mmc_host_classdev_release(struct device *dev)
-{
- struct mmc_host *host = cls_dev_to_mmc_host(dev);
- kfree(host);
-}
-
-static struct class mmc_host_class = {
- .name = "mmc_host",
- .dev_release = mmc_host_classdev_release,
-};
-
-static DEFINE_IDR(mmc_host_idr);
-static DEFINE_SPINLOCK(mmc_host_lock);
-
-/*
- * Internal function. Allocate a new MMC host.
- */
-struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
-{
- struct mmc_host *host;
-
- host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
- if (host) {
- memset(host, 0, sizeof(struct mmc_host) + extra);
-
- host->parent = dev;
- host->class_dev.parent = dev;
- host->class_dev.class = &mmc_host_class;
- device_initialize(&host->class_dev);
- }
- return host;
+ return error;
}
-/*
- * Internal function. Register a new MMC host with the MMC class.
- */
-int mmc_add_host_sysfs(struct mmc_host *host)
+void mmc_remove_attrs(struct mmc_card *card, struct device_attribute *attrs)
{
- int err;
-
- if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
- return -ENOMEM;
-
- spin_lock(&mmc_host_lock);
- err = idr_get_new(&mmc_host_idr, host, &host->index);
- spin_unlock(&mmc_host_lock);
- if (err)
- return err;
-
- snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
- "mmc%d", host->index);
-
- return device_add(&host->class_dev);
-}
+ int i;
-/*
- * Internal function. Unregister a MMC host with the MMC class.
- */
-void mmc_remove_host_sysfs(struct mmc_host *host)
-{
- device_del(&host->class_dev);
-
- spin_lock(&mmc_host_lock);
- idr_remove(&mmc_host_idr, host->index);
- spin_unlock(&mmc_host_lock);
-}
-
-/*
- * Internal function. Free a MMC host.
- */
-void mmc_free_host_sysfs(struct mmc_host *host)
-{
- put_device(&host->class_dev);
-}
-
-static struct workqueue_struct *workqueue;
-
-/*
- * Internal function. Schedule delayed work in the MMC work queue.
- */
-int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
-{
- return queue_delayed_work(workqueue, work, delay);
-}
-
-/*
- * Internal function. Flush all scheduled work from the MMC work queue.
- */
-void mmc_flush_scheduled_work(void)
-{
- flush_workqueue(workqueue);
-}
-
-static int __init mmc_init(void)
-{
- int ret;
-
- workqueue = create_singlethread_workqueue("kmmcd");
- if (!workqueue)
- return -ENOMEM;
-
- ret = bus_register(&mmc_bus_type);
- if (ret == 0) {
- ret = class_register(&mmc_host_class);
- if (ret)
- bus_unregister(&mmc_bus_type);
- }
- return ret;
-}
-
-static void __exit mmc_exit(void)
-{
- class_unregister(&mmc_host_class);
- bus_unregister(&mmc_bus_type);
- destroy_workqueue(workqueue);
+ for (i = 0; attr_name(attrs[i]); i++)
+ device_remove_file(&card->dev, &attrs[i]);
}
-module_init(mmc_init);
-module_exit(mmc_exit);
#ifndef _MMC_CORE_SYSFS_H
#define _MMC_CORE_SYSFS_H
-void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
-int mmc_register_card(struct mmc_card *card);
-void mmc_remove_card(struct mmc_card *card);
+#define MMC_ATTR_FN(name, fmt, args...) \
+static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ struct mmc_card *card = container_of(dev, struct mmc_card, dev);\
+ return sprintf(buf, fmt, args); \
+}
-struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev);
-int mmc_add_host_sysfs(struct mmc_host *host);
-void mmc_remove_host_sysfs(struct mmc_host *host);
-void mmc_free_host_sysfs(struct mmc_host *host);
+#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
-int mmc_schedule_work(struct work_struct *work);
-int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
-void mmc_flush_scheduled_work(void);
+int mmc_add_attrs(struct mmc_card *card, struct device_attribute *attrs);
+void mmc_remove_attrs(struct mmc_card *card, struct device_attribute *attrs);
#endif
#define DRIVER_NAME "at91_mci"
-#undef SUPPORT_4WIRE
-
#define FL_SENT_COMMAND (1 << 0)
#define FL_SENT_STOP (1 << 1)
/*
* Copy from sg to a dma block - used for transfers
*/
-static inline void at91mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data)
+static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data)
{
unsigned int len, i, size;
unsigned *dmabuf = host->buffer;
/*
* Prepare a dma read
*/
-static void at91mci_pre_dma_read(struct at91mci_host *host)
+static void at91_mci_pre_dma_read(struct at91mci_host *host)
{
int i;
struct scatterlist *sg;
/*
* Handle after a dma read
*/
-static void at91mci_post_dma_read(struct at91mci_host *host)
+static void at91_mci_post_dma_read(struct at91mci_host *host)
{
struct mmc_command *cmd;
struct mmc_data *data;
}
while (host->in_use_index < host->transfer_index) {
- unsigned int *buffer;
-
struct scatterlist *sg;
pr_debug("finishing index %d\n", host->in_use_index);
dma_unmap_page(NULL, sg->dma_address, sg->length, DMA_FROM_DEVICE);
- /* Swap the contents of the buffer */
- buffer = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
- pr_debug("buffer = %p, length = %d\n", buffer, sg->length);
-
data->bytes_xfered += sg->length;
if (cpu_is_at91rm9200()) { /* AT91RM9200 errata */
+ unsigned int *buffer;
int index;
+ /* Swap the contents of the buffer */
+ buffer = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
+ pr_debug("buffer = %p, length = %d\n", buffer, sg->length);
+
for (index = 0; index < (sg->length / 4); index++)
buffer[index] = swab32(buffer[index]);
+
+ kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
}
- kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
flush_dcache_page(sg->page);
}
/* Is there another transfer to trigger? */
if (host->transfer_index < data->sg_len)
- at91mci_pre_dma_read(host);
+ at91_mci_pre_dma_read(host);
else {
+ at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_ENDRX);
at91_mci_write(host, AT91_MCI_IER, AT91_MCI_RXBUFF);
- at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
}
pr_debug("post dma read done\n");
/* Now wait for cmd ready */
at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_TXBUFE);
- at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
cmd = host->cmd;
if (!cmd) return;
data = cmd->data;
if (!data) return;
+ if (cmd->data->flags & MMC_DATA_MULTI) {
+ pr_debug("multiple write : wait for BLKE...\n");
+ at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE);
+ } else
+ at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
+
data->bytes_xfered = host->total_length;
}
+/*Handle after command sent ready*/
+static int at91_mci_handle_cmdrdy(struct at91mci_host *host)
+{
+ if (!host->cmd)
+ return 1;
+ else if (!host->cmd->data) {
+ if (host->flags & FL_SENT_STOP) {
+ /*After multi block write, we must wait for NOTBUSY*/
+ at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY);
+ } else return 1;
+ } else if (host->cmd->data->flags & MMC_DATA_WRITE) {
+ /*After sendding multi-block-write command, start DMA transfer*/
+ at91_mci_write(host, AT91_MCI_IER, AT91_MCI_TXBUFE);
+ at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE);
+ at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
+ }
+
+ /* command not completed, have to wait */
+ return 0;
+}
+
+
/*
* Enable the controller
*/
static void at91_mci_enable(struct at91mci_host *host)
{
+ unsigned int mr;
+
at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN);
at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
at91_mci_write(host, AT91_MCI_DTOR, AT91_MCI_DTOMUL_1M | AT91_MCI_DTOCYC);
- at91_mci_write(host, AT91_MCI_MR, AT91_MCI_PDCMODE | 0x34a);
+ mr = AT91_MCI_PDCMODE | 0x34a;
+
+ if (cpu_is_at91sam9260() || cpu_is_at91sam9263())
+ mr |= AT91_MCI_RDPROOF | AT91_MCI_WRPROOF;
+
+ at91_mci_write(host, AT91_MCI_MR, mr);
/* use Slot A or B (only one at same time) */
at91_mci_write(host, AT91_MCI_SDCR, host->board->slot_b);
/*
* Send a command
- * return the interrupts to enable
*/
-static unsigned int at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd)
+static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd)
{
unsigned int cmdr, mr;
unsigned int block_length;
host->cmd = cmd;
- /* Not sure if this is needed */
-#if 0
+ /* Needed for leaving busy state before CMD1 */
if ((at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_RTOE) && (cmd->opcode == 1)) {
pr_debug("Clearing timeout\n");
at91_mci_write(host, AT91_MCI_ARGR, 0);
pr_debug("Clearing: SR = %08X\n", at91_mci_read(host, AT91_MCI_SR));
}
}
-#endif
+
cmdr = cmd->opcode;
if (mmc_resp_type(cmd) == MMC_RSP_NONE)
at91_mci_write(host, ATMEL_PDC_TCR, 0);
at91_mci_write(host, ATMEL_PDC_TNPR, 0);
at91_mci_write(host, ATMEL_PDC_TNCR, 0);
+ ier = AT91_MCI_CMDRDY;
+ } else {
+ /* zero block length and PDC mode */
+ mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff;
+ at91_mci_write(host, AT91_MCI_MR, mr | (block_length << 16) | AT91_MCI_PDCMODE);
- at91_mci_write(host, AT91_MCI_ARGR, cmd->arg);
- at91_mci_write(host, AT91_MCI_CMDR, cmdr);
- return AT91_MCI_CMDRDY;
- }
-
- mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff; /* zero block length and PDC mode */
- at91_mci_write(host, AT91_MCI_MR, mr | (block_length << 16) | AT91_MCI_PDCMODE);
-
- /*
- * Disable the PDC controller
- */
- at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
-
- if (cmdr & AT91_MCI_TRCMD_START) {
- data->bytes_xfered = 0;
- host->transfer_index = 0;
- host->in_use_index = 0;
- if (cmdr & AT91_MCI_TRDIR) {
- /*
- * Handle a read
- */
- host->buffer = NULL;
- host->total_length = 0;
-
- at91mci_pre_dma_read(host);
- ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */;
- }
- else {
- /*
- * Handle a write
- */
- host->total_length = block_length * blocks;
- host->buffer = dma_alloc_coherent(NULL,
- host->total_length,
- &host->physical_address, GFP_KERNEL);
-
- at91mci_sg_to_dma(host, data);
-
- pr_debug("Transmitting %d bytes\n", host->total_length);
+ /*
+ * Disable the PDC controller
+ */
+ at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
- at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address);
- at91_mci_write(host, ATMEL_PDC_TCR, host->total_length / 4);
- ier = AT91_MCI_TXBUFE;
+ if (cmdr & AT91_MCI_TRCMD_START) {
+ data->bytes_xfered = 0;
+ host->transfer_index = 0;
+ host->in_use_index = 0;
+ if (cmdr & AT91_MCI_TRDIR) {
+ /*
+ * Handle a read
+ */
+ host->buffer = NULL;
+ host->total_length = 0;
+
+ at91_mci_pre_dma_read(host);
+ ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */;
+ }
+ else {
+ /*
+ * Handle a write
+ */
+ host->total_length = block_length * blocks;
+ host->buffer = dma_alloc_coherent(NULL,
+ host->total_length,
+ &host->physical_address, GFP_KERNEL);
+
+ at91_mci_sg_to_dma(host, data);
+
+ pr_debug("Transmitting %d bytes\n", host->total_length);
+
+ at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address);
+ at91_mci_write(host, ATMEL_PDC_TCR, host->total_length / 4);
+ ier = AT91_MCI_CMDRDY;
+ }
}
}
if (cmdr & AT91_MCI_TRCMD_START) {
if (cmdr & AT91_MCI_TRDIR)
at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN);
- else
- at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
}
- return ier;
-}
-
-/*
- * Wait for a command to complete
- */
-static void at91mci_process_command(struct at91mci_host *host, struct mmc_command *cmd)
-{
- unsigned int ier;
-
- ier = at91_mci_send_command(host, cmd);
-
- pr_debug("setting ier to %08X\n", ier);
- /* Stop on errors or the required value */
+ /* Enable selected interrupts */
at91_mci_write(host, AT91_MCI_IER, AT91_MCI_ERRORS | ier);
}
/*
* Process the next step in the request
*/
-static void at91mci_process_next(struct at91mci_host *host)
+static void at91_mci_process_next(struct at91mci_host *host)
{
if (!(host->flags & FL_SENT_COMMAND)) {
host->flags |= FL_SENT_COMMAND;
- at91mci_process_command(host, host->request->cmd);
+ at91_mci_send_command(host, host->request->cmd);
}
else if ((!(host->flags & FL_SENT_STOP)) && host->request->stop) {
host->flags |= FL_SENT_STOP;
- at91mci_process_command(host, host->request->stop);
+ at91_mci_send_command(host, host->request->stop);
}
else
mmc_request_done(host->mmc, host->request);
/*
* Handle a command that has been completed
*/
-static void at91mci_completed_command(struct at91mci_host *host)
+static void at91_mci_completed_command(struct at91mci_host *host)
{
struct mmc_command *cmd = host->cmd;
unsigned int status;
else
cmd->error = MMC_ERR_NONE;
- at91mci_process_next(host);
+ at91_mci_process_next(host);
}
/*
host->request = mrq;
host->flags = 0;
- at91mci_process_next(host);
+ at91_mci_process_next(host);
}
/*
at91_mci_handle_transmitted(host);
}
+ if (int_status & AT91_MCI_ENDRX) {
+ pr_debug("ENDRX\n");
+ at91_mci_post_dma_read(host);
+ }
+
if (int_status & AT91_MCI_RXBUFF) {
pr_debug("RX buffer full\n");
- at91_mci_write(host, AT91_MCI_IER, AT91_MCI_CMDRDY);
+ at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS);
+ at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_RXBUFF | AT91_MCI_ENDRX);
+ completed = 1;
}
if (int_status & AT91_MCI_ENDTX)
pr_debug("Transmit has ended\n");
- if (int_status & AT91_MCI_ENDRX) {
- pr_debug("Receive has ended\n");
- at91mci_post_dma_read(host);
- }
-
if (int_status & AT91_MCI_NOTBUSY) {
pr_debug("Card is ready\n");
- at91_mci_write(host, AT91_MCI_IER, AT91_MCI_CMDRDY);
+ completed = 1;
}
if (int_status & AT91_MCI_DTIP)
pr_debug("Data transfer in progress\n");
- if (int_status & AT91_MCI_BLKE)
+ if (int_status & AT91_MCI_BLKE) {
pr_debug("Block transfer has ended\n");
+ completed = 1;
+ }
if (int_status & AT91_MCI_TXRDY)
pr_debug("Ready to transmit\n");
if (int_status & AT91_MCI_CMDRDY) {
pr_debug("Command ready\n");
- completed = 1;
+ completed = at91_mci_handle_cmdrdy(host);
}
}
if (completed) {
pr_debug("Completed command\n");
at91_mci_write(host, AT91_MCI_IDR, 0xffffffff);
- at91mci_completed_command(host);
+ at91_mci_completed_command(host);
} else
at91_mci_write(host, AT91_MCI_IDR, int_status);
host->bus_mode = 0;
host->board = pdev->dev.platform_data;
if (host->board->wire4) {
-#ifdef SUPPORT_4WIRE
- mmc->caps |= MMC_CAP_4_BIT_DATA;
-#else
- printk("AT91 MMC: 4 wire bus mode not supported by this driver - using 1 wire\n");
-#endif
+ if (cpu_is_at91sam9260() || cpu_is_at91sam9263())
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+ else
+ printk("AT91 MMC: 4 wire bus mode not supported"
+ " - using 1 wire\n");
}
/*
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
},
+ {
+ .vendor = PCI_VENDOR_ID_ENE,
+ .device = PCI_DEVICE_ID_ENE_CB712_SD_2,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
+ },
+
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
}
- intmask &= SDHCI_INT_BUS_POWER;
+ intmask &= ~SDHCI_INT_BUS_POWER;
if (intmask) {
printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
#define PCI_VENDOR_ID_ENE 0x1524
#define PCI_DEVICE_ID_ENE_CB712_SD 0x0550
+#define PCI_DEVICE_ID_ENE_CB712_SD_2 0x0551
#define PCI_DEVICE_ID_ENE_1211 0x1211
#define PCI_DEVICE_ID_ENE_1225 0x1225
#define PCI_DEVICE_ID_ENE_1410 0x1410
projects / linux-beck.git / commitdiff