#include <linux/kthread.h>
#include <linux/device.h>
#include <linux/delay.h>
+#include <linux/idr.h>
+#include <linux/rwsem.h>
+#include <asm/semaphore.h>
+#include <linux/ctype.h>
#include "fw-transaction.h"
#include "fw-topology.h"
#include "fw-device.h"
int length = 0;
int i = 0;
- if (!is_fw_unit(dev))
- goto out;
-
get_modalias(unit, modalias, sizeof modalias);
if (add_uevent_var(envp, num_envp, &i,
"MODALIAS=%s", modalias))
return -ENOMEM;
- out:
envp[i] = NULL;
return 0;
struct bus_type fw_bus_type = {
.name = "firewire",
.match = fw_unit_match,
- .uevent = fw_unit_uevent,
};
EXPORT_SYMBOL(fw_bus_type);
-extern struct fw_device *fw_device_get(struct fw_device *device)
+struct fw_device *fw_device_get(struct fw_device *device)
{
get_device(&device->device);
return device;
}
-extern void fw_device_put(struct fw_device *device)
+void fw_device_put(struct fw_device *device)
{
put_device(&device->device);
}
}
EXPORT_SYMBOL(fw_device_enable_phys_dma);
+struct config_rom_attribute {
+ struct device_attribute attr;
+ u32 key;
+};
+
+static ssize_t
+show_immediate(struct device *dev, struct device_attribute *dattr, char *buf)
+{
+ struct config_rom_attribute *attr =
+ container_of(dattr, struct config_rom_attribute, attr);
+ struct fw_csr_iterator ci;
+ u32 *dir;
+ int key, value;
+
+ if (is_fw_unit(dev))
+ dir = fw_unit(dev)->directory;
+ else
+ dir = fw_device(dev)->config_rom + 5;
+
+ fw_csr_iterator_init(&ci, dir);
+ while (fw_csr_iterator_next(&ci, &key, &value))
+ if (attr->key == key)
+ return snprintf(buf, buf ? PAGE_SIZE : 0,
+ "0x%06x\n", value);
+
+ return -ENOENT;
+}
+
+#define IMMEDIATE_ATTR(name, key) \
+ { __ATTR(name, S_IRUGO, show_immediate, NULL), key }
+
+static ssize_t
+show_text_leaf(struct device *dev, struct device_attribute *dattr, char *buf)
+{
+ struct config_rom_attribute *attr =
+ container_of(dattr, struct config_rom_attribute, attr);
+ struct fw_csr_iterator ci;
+ u32 *dir, *block = NULL, *p, *end;
+ int length, key, value, last_key = 0;
+ char *b;
+
+ if (is_fw_unit(dev))
+ dir = fw_unit(dev)->directory;
+ else
+ dir = fw_device(dev)->config_rom + 5;
+
+ fw_csr_iterator_init(&ci, dir);
+ while (fw_csr_iterator_next(&ci, &key, &value)) {
+ if (attr->key == last_key &&
+ key == (CSR_DESCRIPTOR | CSR_LEAF))
+ block = ci.p - 1 + value;
+ last_key = key;
+ }
+
+ if (block == NULL)
+ return -ENOENT;
+
+ length = min(block[0] >> 16, 256U);
+ if (length < 3)
+ return -ENOENT;
+
+ if (block[1] != 0 || block[2] != 0)
+ /* Unknown encoding. */
+ return -ENOENT;
+
+ if (buf == NULL)
+ return length * 4;
+
+ b = buf;
+ end = &block[length + 1];
+ for (p = &block[3]; p < end; p++, b += 4)
+ * (u32 *) b = (__force u32) __cpu_to_be32(*p);
+
+ /* Strip trailing whitespace and add newline. */
+ while (b--, (isspace(*b) || *b == '\0') && b > buf);
+ strcpy(b + 1, "\n");
+
+ return b + 2 - buf;
+}
+
+#define TEXT_LEAF_ATTR(name, key) \
+ { __ATTR(name, S_IRUGO, show_text_leaf, NULL), key }
+
+static struct config_rom_attribute config_rom_attributes[] = {
+ IMMEDIATE_ATTR(vendor, CSR_VENDOR),
+ IMMEDIATE_ATTR(hardware_version, CSR_HARDWARE_VERSION),
+ IMMEDIATE_ATTR(specifier_id, CSR_SPECIFIER_ID),
+ IMMEDIATE_ATTR(version, CSR_VERSION),
+ IMMEDIATE_ATTR(model, CSR_MODEL),
+ TEXT_LEAF_ATTR(vendor_name, CSR_VENDOR),
+ TEXT_LEAF_ATTR(model_name, CSR_MODEL),
+ TEXT_LEAF_ATTR(hardware_version_name, CSR_HARDWARE_VERSION),
+};
+
+static void
+init_fw_attribute_group(struct device *dev,
+ struct device_attribute *attrs,
+ struct fw_attribute_group *group)
+{
+ struct device_attribute *attr;
+ int i, j;
+
+ for (j = 0; attrs[j].attr.name != NULL; j++)
+ group->attrs[j] = &attrs[j].attr;
+
+ for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) {
+ attr = &config_rom_attributes[i].attr;
+ if (attr->show(dev, attr, NULL) < 0)
+ continue;
+ group->attrs[j++] = &attr->attr;
+ }
+
+ BUG_ON(j >= ARRAY_SIZE(group->attrs));
+ group->attrs[j++] = NULL;
+ group->groups[0] = &group->group;
+ group->groups[1] = NULL;
+ group->group.attrs = group->attrs;
+ dev->groups = group->groups;
+}
+
static ssize_t
-show_modalias_attribute(struct device *dev,
- struct device_attribute *attr, char *buf)
+modalias_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct fw_unit *unit = fw_unit(dev);
int length;
return length + 1;
}
-static struct device_attribute modalias_attribute = {
- .attr = { .name = "modalias", .mode = S_IRUGO, },
- .show = show_modalias_attribute,
+static ssize_t
+rom_index_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fw_device *device = fw_device(dev->parent);
+ struct fw_unit *unit = fw_unit(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ (int)(unit->directory - device->config_rom));
+}
+
+static struct device_attribute fw_unit_attributes[] = {
+ __ATTR_RO(modalias),
+ __ATTR_RO(rom_index),
+ __ATTR_NULL,
};
static ssize_t
-show_config_rom_attribute(struct device *dev,
- struct device_attribute *attr, char *buf)
+config_rom_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct fw_device *device = fw_device(dev);
return device->config_rom_length * 4;
}
-static struct device_attribute config_rom_attribute = {
- .attr = {.name = "config_rom", .mode = S_IRUGO,},
- .show = show_config_rom_attribute,
+static ssize_t
+guid_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct fw_device *device = fw_device(dev);
+ u64 guid;
+
+ guid = ((u64)device->config_rom[3] << 32) | device->config_rom[4];
+
+ return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
+ (unsigned long long)guid);
+}
+
+static struct device_attribute fw_device_attributes[] = {
+ __ATTR_RO(config_rom),
+ __ATTR_RO(guid),
+ __ATTR_NULL,
};
struct read_quadlet_callback_data {
kfree(unit);
}
+static struct device_type fw_unit_type = {
+ .uevent = fw_unit_uevent,
+ .release = fw_unit_release,
+};
+
static int is_fw_unit(struct device *dev)
{
- return dev->release == fw_unit_release;
+ return dev->type == &fw_unit_type;
}
static void create_units(struct fw_device *device)
unit->directory = ci.p + value - 1;
unit->device.bus = &fw_bus_type;
- unit->device.release = fw_unit_release;
+ unit->device.type = &fw_unit_type;
unit->device.parent = &device->device;
snprintf(unit->device.bus_id, sizeof unit->device.bus_id,
"%s.%d", device->device.bus_id, i++);
- if (device_register(&unit->device) < 0) {
- kfree(unit);
- continue;
- }
+ init_fw_attribute_group(&unit->device,
+ fw_unit_attributes,
+ &unit->attribute_group);
+ if (device_register(&unit->device) < 0)
+ goto skip_unit;
- if (device_create_file(&unit->device, &modalias_attribute) < 0) {
- device_unregister(&unit->device);
- kfree(unit);
- }
+ continue;
+
+ skip_unit:
+ kfree(unit);
}
}
static int shutdown_unit(struct device *device, void *data)
{
- struct fw_unit *unit = fw_unit(device);
-
- if (is_fw_unit(device)) {
- device_remove_file(&unit->device, &modalias_attribute);
- device_unregister(&unit->device);
- }
+ device_unregister(device);
return 0;
}
+static DECLARE_RWSEM(idr_rwsem);
+static DEFINE_IDR(fw_device_idr);
+int fw_cdev_major;
+
+struct fw_device *fw_device_from_devt(dev_t devt)
+{
+ struct fw_device *device;
+
+ down_read(&idr_rwsem);
+ device = idr_find(&fw_device_idr, MINOR(devt));
+ up_read(&idr_rwsem);
+
+ return device;
+}
+
static void fw_device_shutdown(struct work_struct *work)
{
struct fw_device *device =
container_of(work, struct fw_device, work.work);
+ int minor = MINOR(device->device.devt);
- device_remove_file(&device->device, &config_rom_attribute);
- cdev_del(&device->cdev);
- unregister_chrdev_region(device->device.devt, 1);
+ down_write(&idr_rwsem);
+ idr_remove(&fw_device_idr, minor);
+ up_write(&idr_rwsem);
+
+ fw_device_cdev_remove(device);
device_for_each_child(&device->device, NULL, shutdown_unit);
device_unregister(&device->device);
}
+static struct device_type fw_device_type = {
+ .release = fw_device_release,
+};
+
/* These defines control the retry behavior for reading the config
* rom. It shouldn't be necessary to tweak these; if the device
* doesn't respond to a config rom read within 10 seconds, it's not
* aggressive than that, since it scales pretty well; if 10 devices
* are plugged in, they're all getting read within one second. */
-#define MAX_RETRIES 5
-#define RETRY_DELAY (2 * HZ)
+#define MAX_RETRIES 10
+#define RETRY_DELAY (3 * HZ)
#define INITIAL_DELAY (HZ / 2)
static void fw_device_init(struct work_struct *work)
{
- static atomic_t serial = ATOMIC_INIT(-1);
struct fw_device *device =
container_of(work, struct fw_device, work.work);
+ int minor, err;
/* All failure paths here set node->data to NULL, so that we
* don't try to do device_for_each_child() on a kfree()'d
return;
}
+ err = -ENOMEM;
+ down_write(&idr_rwsem);
+ if (idr_pre_get(&fw_device_idr, GFP_KERNEL))
+ err = idr_get_new(&fw_device_idr, device, &minor);
+ up_write(&idr_rwsem);
+ if (err < 0)
+ goto error;
+
device->device.bus = &fw_bus_type;
- device->device.release = fw_device_release;
+ device->device.type = &fw_device_type;
device->device.parent = device->card->device;
+ device->device.devt = MKDEV(fw_cdev_major, minor);
snprintf(device->device.bus_id, sizeof device->device.bus_id,
- "fw%d", atomic_inc_return(&serial));
-
- if (alloc_chrdev_region(&device->device.devt, 0, 1, "fw")) {
- fw_error("Failed to register char device region.\n");
- goto error;
- }
-
- cdev_init(&device->cdev, &fw_device_ops);
- device->cdev.owner = THIS_MODULE;
- kobject_set_name(&device->cdev.kobj, device->device.bus_id);
- if (cdev_add(&device->cdev, device->device.devt, 1)) {
- fw_error("Failed to register char device.\n");
- goto error;
- }
+ "fw%d", minor);
+ init_fw_attribute_group(&device->device,
+ fw_device_attributes,
+ &device->attribute_group);
if (device_add(&device->device)) {
fw_error("Failed to add device.\n");
- goto error;
- }
-
- if (device_create_file(&device->device, &config_rom_attribute) < 0) {
- fw_error("Failed to create config rom file.\n");
- goto error_with_device;
+ goto error_with_cdev;
}
create_units(device);
return;
- error_with_device:
- device_del(&device->device);
+ error_with_cdev:
+ down_write(&idr_rwsem);
+ idr_remove(&fw_device_idr, minor);
+ up_write(&idr_rwsem);
error:
- cdev_del(&device->cdev);
- unregister_chrdev_region(device->device.devt, 1);
put_device(&device->device);
}
struct fw_unit *unit = fw_unit(dev);
struct fw_driver *driver = (struct fw_driver *)dev->driver;
- if (is_fw_unit(dev) && driver != NULL && driver->update != NULL)
+ if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) {
+ down(&dev->sem);
driver->update(unit);
+ up(&dev->sem);
+ }
return 0;
}
struct fw_device *device =
container_of(work, struct fw_device, work.work);
+ fw_device_cdev_update(device);
device_for_each_child(&device->device, NULL, update_unit);
}
device->node = fw_node_get(node);
device->node_id = node->node_id;
device->generation = card->generation;
+ INIT_LIST_HEAD(&device->client_list);
/* Set the node data to point back to this device so
* FW_NODE_UPDATED callbacks can update the node_id
projects / linux-2.6-omap-h63xx.git / blobdiff