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-rw-r--r--drivers/uio/Kconfig110
-rw-r--r--drivers/uio/Makefile8
-rw-r--r--drivers/uio/uio.c318
-rw-r--r--drivers/uio/uio_aec.c163
-rw-r--r--drivers/uio/uio_cif.c25
-rw-r--r--drivers/uio/uio_dmem_genirq.c357
-rw-r--r--drivers/uio/uio_mf624.c246
-rw-r--r--drivers/uio/uio_netx.c179
-rw-r--r--drivers/uio/uio_pci_generic.c127
-rw-r--r--drivers/uio/uio_pdrv.c120
-rw-r--r--drivers/uio/uio_pdrv_genirq.c153
-rw-r--r--drivers/uio/uio_pruss.c242
-rw-r--r--drivers/uio/uio_sercos3.c22
-rw-r--r--drivers/uio/uio_smx.c140
14 files changed, 1700 insertions, 510 deletions
diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 04b954cfce7..5a90914d856 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -1,7 +1,6 @@
menuconfig UIO
tristate "Userspace I/O drivers"
- depends on !S390
- default n
+ depends on MMU
help
Enable this to allow the userspace driver core code to be
built. This code allows userspace programs easy access to
@@ -16,23 +15,15 @@ if UIO
config UIO_CIF
tristate "generic Hilscher CIF Card driver"
depends on PCI
- default n
help
Driver for Hilscher CIF DeviceNet and Profibus cards. This
- driver requires a userspace component that handles all of the
- heavy lifting and can be found at:
- http://www.osadl.org/projects/downloads/UIO/user/cif-*
+ driver requires a userspace component called cif that handles
+ all of the heavy lifting and can be found at:
+ <http://www.osadl.org/projects/downloads/UIO/user/>
To compile this driver as a module, choose M here: the module
will be called uio_cif.
-config UIO_PDRV
- tristate "Userspace I/O platform driver"
- help
- Generic platform driver for Userspace I/O devices.
-
- If you don't know what to do here, say N.
-
config UIO_PDRV_GENIRQ
tristate "Userspace I/O platform driver with generic IRQ handling"
help
@@ -46,21 +37,43 @@ config UIO_PDRV_GENIRQ
If you don't know what to do here, say N.
-config UIO_SMX
- tristate "SMX cryptengine UIO interface"
- default n
+config UIO_DMEM_GENIRQ
+ tristate "Userspace platform driver with generic irq and dynamic memory"
+ depends on HAS_DMA
+ help
+ Platform driver for Userspace I/O devices, including generic
+ interrupt handling code. Shared interrupts are not supported.
+
+ Memory regions can be specified with the same platform device
+ resources as the UIO_PDRV drivers, but dynamic regions can also
+ be specified.
+ The number and size of these regions is static,
+ but the memory allocation is not performed until
+ the associated device file is opened. The
+ memory is freed once the uio device is closed.
+
+ If you don't know what to do here, say N.
+
+config UIO_AEC
+ tristate "AEC video timestamp device"
+ depends on PCI
help
- Userspace IO interface to the Cryptography engine found on the
- Nias Digital SMX boards. These will be available from Q4 2008
- from http://www.niasdigital.com. The userspace part of this
- driver will be released under the GPL at the same time as the
- hardware and will be able to be downloaded from the same site.
- If you compile this as a module, it will be called uio_smx.
+ UIO driver for the Adrienne Electronics Corporation PCI time
+ code device.
+
+ This device differs from other UIO devices since it uses I/O
+ ports instead of memory mapped I/O. In order to make it
+ possible for UIO to work with this device a utility, uioport,
+ can be used to read and write the ports:
+
+ git clone git://ifup.org/philips/uioport.git
+
+ If you compile this as a module, it will be called uio_aec.
config UIO_SERCOS3
tristate "Automata Sercos III PCI card driver"
- default n
+ depends on PCI
help
Userspace I/O interface for the Sercos III PCI card from
Automata GmbH. The userspace part of this driver will be
@@ -71,4 +84,55 @@ config UIO_SERCOS3
If you compile this as a module, it will be called uio_sercos3.
+config UIO_PCI_GENERIC
+ tristate "Generic driver for PCI 2.3 and PCI Express cards"
+ depends on PCI
+ help
+ Generic driver that you can bind, dynamically, to any
+ PCI 2.3 compliant and PCI Express card. It is useful,
+ primarily, for virtualization scenarios.
+ If you compile this as a module, it will be called uio_pci_generic.
+
+config UIO_NETX
+ tristate "Hilscher NetX Card driver"
+ depends on PCI
+ help
+ Driver for Hilscher NetX based fieldbus cards (cifX, comX).
+ This driver requires a userspace component that comes with the card
+ or is available from Hilscher (http://www.hilscher.com).
+
+ To compile this driver as a module, choose M here; the module
+ will be called uio_netx.
+
+config UIO_PRUSS
+ tristate "Texas Instruments PRUSS driver"
+ depends on ARCH_DAVINCI_DA850
+ select GENERIC_ALLOCATOR
+ help
+ PRUSS driver for OMAPL138/DA850/AM18XX devices
+ PRUSS driver requires user space components, examples and user space
+ driver is available from below SVN repo - you may use anonymous login
+
+ https://gforge.ti.com/gf/project/pru_sw/
+
+ More info on API is available at below wiki
+
+ http://processors.wiki.ti.com/index.php/PRU_Linux_Application_Loader
+
+ To compile this driver as a module, choose M here: the module
+ will be called uio_pruss.
+
+config UIO_MF624
+ tristate "Humusoft MF624 DAQ PCI card driver"
+ depends on PCI
+ help
+ Userspace I/O interface for the Humusoft MF624 PCI card.
+ A sample userspace application using this driver is available
+ (among other MF624 related information and software components)
+ for download in a git repository:
+
+ git clone git://rtime.felk.cvut.cz/mf6xx.git
+
+ If you compile this as a module, it will be called uio_mf624.
+
endif
diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
index e6955814985..d3218bde3ae 100644
--- a/drivers/uio/Makefile
+++ b/drivers/uio/Makefile
@@ -1,6 +1,10 @@
obj-$(CONFIG_UIO) += uio.o
obj-$(CONFIG_UIO_CIF) += uio_cif.o
-obj-$(CONFIG_UIO_PDRV) += uio_pdrv.o
obj-$(CONFIG_UIO_PDRV_GENIRQ) += uio_pdrv_genirq.o
-obj-$(CONFIG_UIO_SMX) += uio_smx.o
+obj-$(CONFIG_UIO_DMEM_GENIRQ) += uio_dmem_genirq.o
+obj-$(CONFIG_UIO_AEC) += uio_aec.o
obj-$(CONFIG_UIO_SERCOS3) += uio_sercos3.o
+obj-$(CONFIG_UIO_PCI_GENERIC) += uio_pci_generic.o
+obj-$(CONFIG_UIO_NETX) += uio_netx.o
+obj-$(CONFIG_UIO_PRUSS) += uio_pruss.o
+obj-$(CONFIG_UIO_MF624) += uio_mf624.o
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 4ca85a113aa..a673e5b6a2e 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -3,7 +3,7 @@
*
* Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
* Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
- * Copyright(C) 2006, Hans J. Koch <hjk@linutronix.de>
+ * Copyright(C) 2006, Hans J. Koch <hjk@hansjkoch.de>
* Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
*
* Userspace IO
@@ -17,13 +17,16 @@
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/device.h>
+#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/idr.h>
+#include <linux/sched.h>
#include <linux/string.h>
#include <linux/kobject.h>
+#include <linux/cdev.h>
#include <linux/uio_driver.h>
-#define UIO_MAX_DEVICES 255
+#define UIO_MAX_DEVICES (1U << MINORBITS)
struct uio_device {
struct module *owner;
@@ -32,22 +35,16 @@ struct uio_device {
atomic_t event;
struct fasync_struct *async_queue;
wait_queue_head_t wait;
- int vma_count;
struct uio_info *info;
struct kobject *map_dir;
struct kobject *portio_dir;
};
static int uio_major;
+static struct cdev *uio_cdev;
static DEFINE_IDR(uio_idr);
static const struct file_operations uio_fops;
-/* UIO class infrastructure */
-static struct uio_class {
- struct kref kref;
- struct class *class;
-} *uio_class;
-
/* Protect idr accesses */
static DEFINE_MUTEX(minor_lock);
@@ -61,9 +58,17 @@ struct uio_map {
};
#define to_map(map) container_of(map, struct uio_map, kobj)
+static ssize_t map_name_show(struct uio_mem *mem, char *buf)
+{
+ if (unlikely(!mem->name))
+ mem->name = "";
+
+ return sprintf(buf, "%s\n", mem->name);
+}
+
static ssize_t map_addr_show(struct uio_mem *mem, char *buf)
{
- return sprintf(buf, "0x%lx\n", mem->addr);
+ return sprintf(buf, "0x%llx\n", (unsigned long long)mem->addr);
}
static ssize_t map_size_show(struct uio_mem *mem, char *buf)
@@ -73,7 +78,7 @@ static ssize_t map_size_show(struct uio_mem *mem, char *buf)
static ssize_t map_offset_show(struct uio_mem *mem, char *buf)
{
- return sprintf(buf, "0x%lx\n", mem->addr & ~PAGE_MASK);
+ return sprintf(buf, "0x%llx\n", (unsigned long long)mem->addr & ~PAGE_MASK);
}
struct map_sysfs_entry {
@@ -82,6 +87,8 @@ struct map_sysfs_entry {
ssize_t (*store)(struct uio_mem *, const char *, size_t);
};
+static struct map_sysfs_entry name_attribute =
+ __ATTR(name, S_IRUGO, map_name_show, NULL);
static struct map_sysfs_entry addr_attribute =
__ATTR(addr, S_IRUGO, map_addr_show, NULL);
static struct map_sysfs_entry size_attribute =
@@ -90,6 +97,7 @@ static struct map_sysfs_entry offset_attribute =
__ATTR(offset, S_IRUGO, map_offset_show, NULL);
static struct attribute *attrs[] = {
+ &name_attribute.attr,
&addr_attribute.attr,
&size_attribute.attr,
&offset_attribute.attr,
@@ -117,7 +125,7 @@ static ssize_t map_type_show(struct kobject *kobj, struct attribute *attr,
return entry->show(mem, buf);
}
-static struct sysfs_ops map_sysfs_ops = {
+static const struct sysfs_ops map_sysfs_ops = {
.show = map_type_show,
};
@@ -133,6 +141,14 @@ struct uio_portio {
};
#define to_portio(portio) container_of(portio, struct uio_portio, kobj)
+static ssize_t portio_name_show(struct uio_port *port, char *buf)
+{
+ if (unlikely(!port->name))
+ port->name = "";
+
+ return sprintf(buf, "%s\n", port->name);
+}
+
static ssize_t portio_start_show(struct uio_port *port, char *buf)
{
return sprintf(buf, "0x%lx\n", port->start);
@@ -159,6 +175,8 @@ struct portio_sysfs_entry {
ssize_t (*store)(struct uio_port *, const char *, size_t);
};
+static struct portio_sysfs_entry portio_name_attribute =
+ __ATTR(name, S_IRUGO, portio_name_show, NULL);
static struct portio_sysfs_entry portio_start_attribute =
__ATTR(start, S_IRUGO, portio_start_show, NULL);
static struct portio_sysfs_entry portio_size_attribute =
@@ -167,6 +185,7 @@ static struct portio_sysfs_entry portio_porttype_attribute =
__ATTR(porttype, S_IRUGO, portio_porttype_show, NULL);
static struct attribute *portio_attrs[] = {
+ &portio_name_attribute.attr,
&portio_start_attribute.attr,
&portio_size_attribute.attr,
&portio_porttype_attribute.attr,
@@ -194,7 +213,7 @@ static ssize_t portio_type_show(struct kobject *kobj, struct attribute *attr,
return entry->show(port, buf);
}
-static struct sysfs_ops portio_sysfs_ops = {
+static const struct sysfs_ops portio_sysfs_ops = {
.show = portio_type_show,
};
@@ -204,39 +223,29 @@ static struct kobj_type portio_attr_type = {
.default_attrs = portio_attrs,
};
-static ssize_t show_name(struct device *dev,
+static ssize_t name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%s\n", idev->info->name);
- else
- return -ENODEV;
+ return sprintf(buf, "%s\n", idev->info->name);
}
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static DEVICE_ATTR_RO(name);
-static ssize_t show_version(struct device *dev,
+static ssize_t version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%s\n", idev->info->version);
- else
- return -ENODEV;
+ return sprintf(buf, "%s\n", idev->info->version);
}
-static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
+static DEVICE_ATTR_RO(version);
-static ssize_t show_event(struct device *dev,
+static ssize_t event_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%u\n",
- (unsigned int)atomic_read(&idev->event));
- else
- return -ENODEV;
+ return sprintf(buf, "%u\n", (unsigned int)atomic_read(&idev->event));
}
-static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
+static DEVICE_ATTR_RO(event);
static struct attribute *uio_attrs[] = {
&dev_attr_name.attr,
@@ -244,9 +253,12 @@ static struct attribute *uio_attrs[] = {
&dev_attr_event.attr,
NULL,
};
+ATTRIBUTE_GROUPS(uio);
-static struct attribute_group uio_attr_grp = {
- .attrs = uio_attrs,
+/* UIO class infrastructure */
+static struct class uio_class = {
+ .name = "uio",
+ .dev_groups = uio_groups,
};
/*
@@ -263,10 +275,6 @@ static int uio_dev_add_attributes(struct uio_device *idev)
struct uio_port *port;
struct uio_portio *portio;
- ret = sysfs_create_group(&idev->dev->kobj, &uio_attr_grp);
- if (ret)
- goto err_group;
-
for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
mem = &idev->info->mem[mi];
if (mem->size == 0)
@@ -280,13 +288,13 @@ static int uio_dev_add_attributes(struct uio_device *idev)
}
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map)
- goto err_map;
+ goto err_map_kobj;
kobject_init(&map->kobj, &map_attr_type);
map->mem = mem;
mem->map = map;
ret = kobject_add(&map->kobj, idev->map_dir, "map%d", mi);
if (ret)
- goto err_map;
+ goto err_map_kobj;
ret = kobject_uevent(&map->kobj, KOBJ_ADD);
if (ret)
goto err_map;
@@ -305,14 +313,14 @@ static int uio_dev_add_attributes(struct uio_device *idev)
}
portio = kzalloc(sizeof(*portio), GFP_KERNEL);
if (!portio)
- goto err_portio;
+ goto err_portio_kobj;
kobject_init(&portio->kobj, &portio_attr_type);
portio->port = port;
port->portio = portio;
ret = kobject_add(&portio->kobj, idev->portio_dir,
"port%d", pi);
if (ret)
- goto err_portio;
+ goto err_portio_kobj;
ret = kobject_uevent(&portio->kobj, KOBJ_ADD);
if (ret)
goto err_portio;
@@ -321,21 +329,23 @@ static int uio_dev_add_attributes(struct uio_device *idev)
return 0;
err_portio:
- for (pi--; pi >= 0; pi--) {
+ pi--;
+err_portio_kobj:
+ for (; pi >= 0; pi--) {
port = &idev->info->port[pi];
portio = port->portio;
kobject_put(&portio->kobj);
}
kobject_put(idev->portio_dir);
err_map:
- for (mi--; mi>=0; mi--) {
+ mi--;
+err_map_kobj:
+ for (; mi >= 0; mi--) {
mem = &idev->info->mem[mi];
map = mem->map;
kobject_put(&map->kobj);
}
kobject_put(idev->map_dir);
- sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
-err_group:
dev_err(idev->dev, "error creating sysfs files (%d)\n", ret);
return ret;
}
@@ -361,27 +371,21 @@ static void uio_dev_del_attributes(struct uio_device *idev)
kobject_put(&port->portio->kobj);
}
kobject_put(idev->portio_dir);
-
- sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
}
static int uio_get_minor(struct uio_device *idev)
{
int retval = -ENOMEM;
- int id;
mutex_lock(&minor_lock);
- if (idr_pre_get(&uio_idr, GFP_KERNEL) == 0)
- goto exit;
-
- retval = idr_get_new(&uio_idr, idev, &id);
- if (retval < 0) {
- if (retval == -EAGAIN)
- retval = -ENOMEM;
- goto exit;
+ retval = idr_alloc(&uio_idr, idev, 0, UIO_MAX_DEVICES, GFP_KERNEL);
+ if (retval >= 0) {
+ idev->minor = retval;
+ retval = 0;
+ } else if (retval == -ENOSPC) {
+ dev_err(idev->dev, "too many uio devices\n");
+ retval = -EINVAL;
}
- idev->minor = id & MAX_ID_MASK;
-exit:
mutex_unlock(&minor_lock);
return retval;
}
@@ -501,7 +505,7 @@ static unsigned int uio_poll(struct file *filep, poll_table *wait)
struct uio_listener *listener = filep->private_data;
struct uio_device *idev = listener->dev;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
poll_wait(filep, &idev->wait, wait);
@@ -519,7 +523,7 @@ static ssize_t uio_read(struct file *filep, char __user *buf,
ssize_t retval;
s32 event_count;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
@@ -567,7 +571,7 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
ssize_t retval;
s32 irq_on;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
@@ -586,35 +590,22 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
static int uio_find_mem_index(struct vm_area_struct *vma)
{
- int mi;
struct uio_device *idev = vma->vm_private_data;
- for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
- if (idev->info->mem[mi].size == 0)
+ if (vma->vm_pgoff < MAX_UIO_MAPS) {
+ if (idev->info->mem[vma->vm_pgoff].size == 0)
return -1;
- if (vma->vm_pgoff == mi)
- return mi;
+ return (int)vma->vm_pgoff;
}
return -1;
}
-static void uio_vma_open(struct vm_area_struct *vma)
-{
- struct uio_device *idev = vma->vm_private_data;
- idev->vma_count++;
-}
-
-static void uio_vma_close(struct vm_area_struct *vma)
-{
- struct uio_device *idev = vma->vm_private_data;
- idev->vma_count--;
-}
-
static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct uio_device *idev = vma->vm_private_data;
struct page *page;
unsigned long offset;
+ void *addr;
int mi = uio_find_mem_index(vma);
if (mi < 0)
@@ -626,48 +617,66 @@ static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
*/
offset = (vmf->pgoff - mi) << PAGE_SHIFT;
+ addr = (void *)(unsigned long)idev->info->mem[mi].addr + offset;
if (idev->info->mem[mi].memtype == UIO_MEM_LOGICAL)
- page = virt_to_page(idev->info->mem[mi].addr + offset);
+ page = virt_to_page(addr);
else
- page = vmalloc_to_page((void *)idev->info->mem[mi].addr
- + offset);
+ page = vmalloc_to_page(addr);
get_page(page);
vmf->page = page;
return 0;
}
-static struct vm_operations_struct uio_vm_ops = {
- .open = uio_vma_open,
- .close = uio_vma_close,
+static const struct vm_operations_struct uio_logical_vm_ops = {
.fault = uio_vma_fault,
};
+static int uio_mmap_logical(struct vm_area_struct *vma)
+{
+ vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
+ vma->vm_ops = &uio_logical_vm_ops;
+ return 0;
+}
+
+static const struct vm_operations_struct uio_physical_vm_ops = {
+#ifdef CONFIG_HAVE_IOREMAP_PROT
+ .access = generic_access_phys,
+#endif
+};
+
static int uio_mmap_physical(struct vm_area_struct *vma)
{
struct uio_device *idev = vma->vm_private_data;
int mi = uio_find_mem_index(vma);
+ struct uio_mem *mem;
if (mi < 0)
return -EINVAL;
+ mem = idev->info->mem + mi;
- vma->vm_flags |= VM_IO | VM_RESERVED;
+ if (mem->addr & ~PAGE_MASK)
+ return -ENODEV;
+ if (vma->vm_end - vma->vm_start > mem->size)
+ return -EINVAL;
+ vma->vm_ops = &uio_physical_vm_ops;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ /*
+ * We cannot use the vm_iomap_memory() helper here,
+ * because vma->vm_pgoff is the map index we looked
+ * up above in uio_find_mem_index(), rather than an
+ * actual page offset into the mmap.
+ *
+ * So we just do the physical mmap without a page
+ * offset.
+ */
return remap_pfn_range(vma,
vma->vm_start,
- idev->info->mem[mi].addr >> PAGE_SHIFT,
+ mem->addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
}
-static int uio_mmap_logical(struct vm_area_struct *vma)
-{
- vma->vm_flags |= VM_RESERVED;
- vma->vm_ops = &uio_vm_ops;
- uio_vma_open(vma);
- return 0;
-}
-
static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct uio_listener *listener = filep->private_data;
@@ -685,8 +694,9 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
if (mi < 0)
return -EINVAL;
- requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
- actual_pages = (idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT;
+ requested_pages = vma_pages(vma);
+ actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK)
+ + idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT;
if (requested_pages > actual_pages)
return -EINVAL;
@@ -715,72 +725,76 @@ static const struct file_operations uio_fops = {
.mmap = uio_mmap,
.poll = uio_poll,
.fasync = uio_fasync,
+ .llseek = noop_llseek,
};
static int uio_major_init(void)
{
- uio_major = register_chrdev(0, "uio", &uio_fops);
- if (uio_major < 0)
- return uio_major;
+ static const char name[] = "uio";
+ struct cdev *cdev = NULL;
+ dev_t uio_dev = 0;
+ int result;
+
+ result = alloc_chrdev_region(&uio_dev, 0, UIO_MAX_DEVICES, name);
+ if (result)
+ goto out;
+
+ result = -ENOMEM;
+ cdev = cdev_alloc();
+ if (!cdev)
+ goto out_unregister;
+
+ cdev->owner = THIS_MODULE;
+ cdev->ops = &uio_fops;
+ kobject_set_name(&cdev->kobj, "%s", name);
+
+ result = cdev_add(cdev, uio_dev, UIO_MAX_DEVICES);
+ if (result)
+ goto out_put;
+
+ uio_major = MAJOR(uio_dev);
+ uio_cdev = cdev;
return 0;
+out_put:
+ kobject_put(&cdev->kobj);
+out_unregister:
+ unregister_chrdev_region(uio_dev, UIO_MAX_DEVICES);
+out:
+ return result;
}
static void uio_major_cleanup(void)
{
- unregister_chrdev(uio_major, "uio");
+ unregister_chrdev_region(MKDEV(uio_major, 0), UIO_MAX_DEVICES);
+ cdev_del(uio_cdev);
}
static int init_uio_class(void)
{
- int ret = 0;
-
- if (uio_class != NULL) {
- kref_get(&uio_class->kref);
- goto exit;
- }
+ int ret;
/* This is the first time in here, set everything up properly */
ret = uio_major_init();
if (ret)
goto exit;
- uio_class = kzalloc(sizeof(*uio_class), GFP_KERNEL);
- if (!uio_class) {
- ret = -ENOMEM;
- goto err_kzalloc;
- }
-
- kref_init(&uio_class->kref);
- uio_class->class = class_create(THIS_MODULE, "uio");
- if (IS_ERR(uio_class->class)) {
- ret = IS_ERR(uio_class->class);
- printk(KERN_ERR "class_create failed for uio\n");
- goto err_class_create;
+ ret = class_register(&uio_class);
+ if (ret) {
+ printk(KERN_ERR "class_register failed for uio\n");
+ goto err_class_register;
}
return 0;
-err_class_create:
- kfree(uio_class);
- uio_class = NULL;
-err_kzalloc:
+err_class_register:
uio_major_cleanup();
exit:
return ret;
}
-static void release_uio_class(struct kref *kref)
+static void release_uio_class(void)
{
- /* Ok, we cheat as we know we only have one uio_class */
- class_destroy(uio_class->class);
- kfree(uio_class);
+ class_unregister(&uio_class);
uio_major_cleanup();
- uio_class = NULL;
-}
-
-static void uio_class_destroy(void)
-{
- if (uio_class)
- kref_put(&uio_class->kref, release_uio_class);
}
/**
@@ -803,14 +817,9 @@ int __uio_register_device(struct module *owner,
info->uio_dev = NULL;
- ret = init_uio_class();
- if (ret)
- return ret;
-
- idev = kzalloc(sizeof(*idev), GFP_KERNEL);
+ idev = devm_kzalloc(parent, sizeof(*idev), GFP_KERNEL);
if (!idev) {
- ret = -ENOMEM;
- goto err_kzalloc;
+ return -ENOMEM;
}
idev->owner = owner;
@@ -820,9 +829,9 @@ int __uio_register_device(struct module *owner,
ret = uio_get_minor(idev);
if (ret)
- goto err_get_minor;
+ return ret;
- idev->dev = device_create(uio_class->class, parent,
+ idev->dev = device_create(&uio_class, parent,
MKDEV(uio_major, idev->minor), idev,
"uio%d", idev->minor);
if (IS_ERR(idev->dev)) {
@@ -837,9 +846,9 @@ int __uio_register_device(struct module *owner,
info->uio_dev = idev;
- if (idev->info->irq >= 0) {
- ret = request_irq(idev->info->irq, uio_interrupt,
- idev->info->irq_flags, idev->info->name, idev);
+ if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
+ ret = devm_request_irq(idev->dev, info->irq, uio_interrupt,
+ info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;
}
@@ -849,13 +858,9 @@ int __uio_register_device(struct module *owner,
err_request_irq:
uio_dev_del_attributes(idev);
err_uio_dev_add_attributes:
- device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
+ device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
err_device_create:
uio_free_minor(idev);
-err_get_minor:
- kfree(idev);
-err_kzalloc:
- uio_class_destroy();
return ret;
}
EXPORT_SYMBOL_GPL(__uio_register_device);
@@ -876,15 +881,9 @@ void uio_unregister_device(struct uio_info *info)
uio_free_minor(idev);
- if (info->irq >= 0)
- free_irq(info->irq, idev);
-
uio_dev_del_attributes(idev);
- dev_set_drvdata(idev->dev, NULL);
- device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
- kfree(idev);
- uio_class_destroy();
+ device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
return;
}
@@ -892,11 +891,12 @@ EXPORT_SYMBOL_GPL(uio_unregister_device);
static int __init uio_init(void)
{
- return 0;
+ return init_uio_class();
}
static void __exit uio_exit(void)
{
+ release_uio_class();
}
module_init(uio_init)
diff --git a/drivers/uio/uio_aec.c b/drivers/uio/uio_aec.c
new file mode 100644
index 00000000000..1549fab633c
--- /dev/null
+++ b/drivers/uio/uio_aec.c
@@ -0,0 +1,163 @@
+/*
+ * uio_aec.c -- simple driver for Adrienne Electronics Corp time code PCI device
+ *
+ * Copyright (C) 2008 Brandon Philips <brandon@ifup.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/cdev.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/uio_driver.h>
+#include <linux/slab.h>
+
+#define PCI_VENDOR_ID_AEC 0xaecb
+#define PCI_DEVICE_ID_AEC_VITCLTC 0x6250
+
+#define INT_ENABLE_ADDR 0xFC
+#define INT_ENABLE 0x10
+#define INT_DISABLE 0x0
+
+#define INT_MASK_ADDR 0x2E
+#define INT_MASK_ALL 0x3F
+
+#define INTA_DRVR_ADDR 0xFE
+#define INTA_ENABLED_FLAG 0x08
+#define INTA_FLAG 0x01
+
+#define MAILBOX 0x0F
+
+static struct pci_device_id ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_AEC, PCI_DEVICE_ID_AEC_VITCLTC), },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, ids);
+
+static irqreturn_t aectc_irq(int irq, struct uio_info *dev_info)
+{
+ void __iomem *int_flag = dev_info->priv + INTA_DRVR_ADDR;
+ unsigned char status = ioread8(int_flag);
+
+
+ if ((status & INTA_ENABLED_FLAG) && (status & INTA_FLAG)) {
+ /* application writes 0x00 to 0x2F to get next interrupt */
+ status = ioread8(dev_info->priv + MAILBOX);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static void print_board_data(struct pci_dev *pdev, struct uio_info *i)
+{
+ dev_info(&pdev->dev, "PCI-TC board vendor: %x%x number: %x%x"
+ " revision: %c%c\n",
+ ioread8(i->priv + 0x01),
+ ioread8(i->priv + 0x00),
+ ioread8(i->priv + 0x03),
+ ioread8(i->priv + 0x02),
+ ioread8(i->priv + 0x06),
+ ioread8(i->priv + 0x07));
+}
+
+static int probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct uio_info *info;
+ int ret;
+
+ info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (pci_enable_device(pdev))
+ goto out_free;
+
+ if (pci_request_regions(pdev, "aectc"))
+ goto out_disable;
+
+ info->name = "aectc";
+ info->port[0].start = pci_resource_start(pdev, 0);
+ if (!info->port[0].start)
+ goto out_release;
+ info->priv = pci_iomap(pdev, 0, 0);
+ if (!info->priv)
+ goto out_release;
+ info->port[0].size = pci_resource_len(pdev, 0);
+ info->port[0].porttype = UIO_PORT_GPIO;
+
+ info->version = "0.0.1";
+ info->irq = pdev->irq;
+ info->irq_flags = IRQF_SHARED;
+ info->handler = aectc_irq;
+
+ print_board_data(pdev, info);
+ ret = uio_register_device(&pdev->dev, info);
+ if (ret)
+ goto out_unmap;
+
+ iowrite32(INT_ENABLE, info->priv + INT_ENABLE_ADDR);
+ iowrite8(INT_MASK_ALL, info->priv + INT_MASK_ADDR);
+ if (!(ioread8(info->priv + INTA_DRVR_ADDR)
+ & INTA_ENABLED_FLAG))
+ dev_err(&pdev->dev, "aectc: interrupts not enabled\n");
+
+ pci_set_drvdata(pdev, info);
+
+ return 0;
+
+out_unmap:
+ pci_iounmap(pdev, info->priv);
+out_release:
+ pci_release_regions(pdev);
+out_disable:
+ pci_disable_device(pdev);
+out_free:
+ kfree(info);
+ return -ENODEV;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+ struct uio_info *info = pci_get_drvdata(pdev);
+
+ /* disable interrupts */
+ iowrite8(INT_DISABLE, info->priv + INT_MASK_ADDR);
+ iowrite32(INT_DISABLE, info->priv + INT_ENABLE_ADDR);
+ /* read mailbox to ensure board drops irq */
+ ioread8(info->priv + MAILBOX);
+
+ uio_unregister_device(info);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ iounmap(info->priv);
+
+ kfree(info);
+}
+
+static struct pci_driver pci_driver = {
+ .name = "aectc",
+ .id_table = ids,
+ .probe = probe,
+ .remove = remove,
+};
+
+module_pci_driver(pci_driver);
+MODULE_LICENSE("GPL");
diff --git a/drivers/uio/uio_cif.c b/drivers/uio/uio_cif.c
index c60b8fcf0e3..30f533ce375 100644
--- a/drivers/uio/uio_cif.c
+++ b/drivers/uio/uio_cif.c
@@ -1,7 +1,7 @@
/*
* UIO Hilscher CIF card driver
*
- * (C) 2007 Hans J. Koch <hjk@linutronix.de>
+ * (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
* Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
*
* Licensed under GPL version 2 only.
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/slab.h>
#include <linux/uio_driver.h>
#include <asm/io.h>
@@ -39,7 +40,7 @@ static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
return IRQ_HANDLED;
}
-static int __devinit hilscher_pci_probe(struct pci_dev *dev,
+static int hilscher_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct uio_info *info;
@@ -78,7 +79,7 @@ static int __devinit hilscher_pci_probe(struct pci_dev *dev,
}
info->version = "0.0.1";
info->irq = dev->irq;
- info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
+ info->irq_flags = IRQF_SHARED;
info->handler = hilscher_handler;
if (uio_register_device(&dev->dev, info))
@@ -105,13 +106,12 @@ static void hilscher_pci_remove(struct pci_dev *dev)
uio_unregister_device(info);
pci_release_regions(dev);
pci_disable_device(dev);
- pci_set_drvdata(dev, NULL);
iounmap(info->mem[0].internal_addr);
kfree (info);
}
-static struct pci_device_id hilscher_pci_ids[] __devinitdata = {
+static struct pci_device_id hilscher_pci_ids[] = {
{
.vendor = PCI_VENDOR_ID_PLX,
.device = PCI_DEVICE_ID_PLX_9030,
@@ -134,18 +134,7 @@ static struct pci_driver hilscher_pci_driver = {
.remove = hilscher_pci_remove,
};
-static int __init hilscher_init_module(void)
-{
- return pci_register_driver(&hilscher_pci_driver);
-}
-
-static void __exit hilscher_exit_module(void)
-{
- pci_unregister_driver(&hilscher_pci_driver);
-}
-
-module_init(hilscher_init_module);
-module_exit(hilscher_exit_module);
-
+module_pci_driver(hilscher_pci_driver);
+MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
new file mode 100644
index 00000000000..8d0bba46956
--- /dev/null
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -0,0 +1,357 @@
+/*
+ * drivers/uio/uio_dmem_genirq.c
+ *
+ * Userspace I/O platform driver with generic IRQ handling code.
+ *
+ * Copyright (C) 2012 Damian Hobson-Garcia
+ *
+ * Based on uio_pdrv_genirq.c by Magnus Damm
+ *
+ * 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.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_data/uio_dmem_genirq.h>
+#include <linux/stringify.h>
+#include <linux/pm_runtime.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+
+#define DRIVER_NAME "uio_dmem_genirq"
+#define DMEM_MAP_ERROR (~0)
+
+struct uio_dmem_genirq_platdata {
+ struct uio_info *uioinfo;
+ spinlock_t lock;
+ unsigned long flags;
+ struct platform_device *pdev;
+ unsigned int dmem_region_start;
+ unsigned int num_dmem_regions;
+ void *dmem_region_vaddr[MAX_UIO_MAPS];
+ struct mutex alloc_lock;
+ unsigned int refcnt;
+};
+
+static int uio_dmem_genirq_open(struct uio_info *info, struct inode *inode)
+{
+ struct uio_dmem_genirq_platdata *priv = info->priv;
+ struct uio_mem *uiomem;
+ int ret = 0;
+ int dmem_region = priv->dmem_region_start;
+
+ uiomem = &priv->uioinfo->mem[priv->dmem_region_start];
+
+ mutex_lock(&priv->alloc_lock);
+ while (!priv->refcnt && uiomem < &priv->uioinfo->mem[MAX_UIO_MAPS]) {
+ void *addr;
+ if (!uiomem->size)
+ break;
+
+ addr = dma_alloc_coherent(&priv->pdev->dev, uiomem->size,
+ (dma_addr_t *)&uiomem->addr, GFP_KERNEL);
+ if (!addr) {
+ uiomem->addr = DMEM_MAP_ERROR;
+ }
+ priv->dmem_region_vaddr[dmem_region++] = addr;
+ ++uiomem;
+ }
+ priv->refcnt++;
+
+ mutex_unlock(&priv->alloc_lock);
+ /* Wait until the Runtime PM code has woken up the device */
+ pm_runtime_get_sync(&priv->pdev->dev);
+ return ret;
+}
+
+static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode)
+{
+ struct uio_dmem_genirq_platdata *priv = info->priv;
+ struct uio_mem *uiomem;
+ int dmem_region = priv->dmem_region_start;
+
+ /* Tell the Runtime PM code that the device has become idle */
+ pm_runtime_put_sync(&priv->pdev->dev);
+
+ uiomem = &priv->uioinfo->mem[priv->dmem_region_start];
+
+ mutex_lock(&priv->alloc_lock);
+
+ priv->refcnt--;
+ while (!priv->refcnt && uiomem < &priv->uioinfo->mem[MAX_UIO_MAPS]) {
+ if (!uiomem->size)
+ break;
+ if (priv->dmem_region_vaddr[dmem_region]) {
+ dma_free_coherent(&priv->pdev->dev, uiomem->size,
+ priv->dmem_region_vaddr[dmem_region],
+ uiomem->addr);
+ }
+ uiomem->addr = DMEM_MAP_ERROR;
+ ++dmem_region;
+ ++uiomem;
+ }
+
+ mutex_unlock(&priv->alloc_lock);
+ return 0;
+}
+
+static irqreturn_t uio_dmem_genirq_handler(int irq, struct uio_info *dev_info)
+{
+ struct uio_dmem_genirq_platdata *priv = dev_info->priv;
+
+ /* Just disable the interrupt in the interrupt controller, and
+ * remember the state so we can allow user space to enable it later.
+ */
+
+ if (!test_and_set_bit(0, &priv->flags))
+ disable_irq_nosync(irq);
+
+ return IRQ_HANDLED;
+}
+
+static int uio_dmem_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
+{
+ struct uio_dmem_genirq_platdata *priv = dev_info->priv;
+ unsigned long flags;
+
+ /* Allow user space to enable and disable the interrupt
+ * in the interrupt controller, but keep track of the
+ * state to prevent per-irq depth damage.
+ *
+ * Serialize this operation to support multiple tasks.
+ */
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (irq_on) {
+ if (test_and_clear_bit(0, &priv->flags))
+ enable_irq(dev_info->irq);
+ } else {
+ if (!test_and_set_bit(0, &priv->flags))
+ disable_irq(dev_info->irq);
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int uio_dmem_genirq_probe(struct platform_device *pdev)
+{
+ struct uio_dmem_genirq_pdata *pdata = dev_get_platdata(&pdev->dev);
+ struct uio_info *uioinfo = &pdata->uioinfo;
+ struct uio_dmem_genirq_platdata *priv;
+ struct uio_mem *uiomem;
+ int ret = -EINVAL;
+ int i;
+
+ if (pdev->dev.of_node) {
+ int irq;
+
+ /* alloc uioinfo for one device */
+ uioinfo = kzalloc(sizeof(*uioinfo), GFP_KERNEL);
+ if (!uioinfo) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "unable to kmalloc\n");
+ goto bad2;
+ }
+ uioinfo->name = pdev->dev.of_node->name;
+ uioinfo->version = "devicetree";
+
+ /* Multiple IRQs are not supported */
+ irq = platform_get_irq(pdev, 0);
+ if (irq == -ENXIO)
+ uioinfo->irq = UIO_IRQ_NONE;
+ else
+ uioinfo->irq = irq;
+ }
+
+ if (!uioinfo || !uioinfo->name || !uioinfo->version) {
+ dev_err(&pdev->dev, "missing platform_data\n");
+ goto bad0;
+ }
+
+ if (uioinfo->handler || uioinfo->irqcontrol ||
+ uioinfo->irq_flags & IRQF_SHARED) {
+ dev_err(&pdev->dev, "interrupt configuration error\n");
+ goto bad0;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "unable to kmalloc\n");
+ goto bad0;
+ }
+
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+
+ priv->uioinfo = uioinfo;
+ spin_lock_init(&priv->lock);
+ priv->flags = 0; /* interrupt is enabled to begin with */
+ priv->pdev = pdev;
+ mutex_init(&priv->alloc_lock);
+
+ if (!uioinfo->irq) {
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ\n");
+ goto bad1;
+ }
+ uioinfo->irq = ret;
+ }
+ uiomem = &uioinfo->mem[0];
+
+ for (i = 0; i < pdev->num_resources; ++i) {
+ struct resource *r = &pdev->resource[i];
+
+ if (r->flags != IORESOURCE_MEM)
+ continue;
+
+ if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
+ dev_warn(&pdev->dev, "device has more than "
+ __stringify(MAX_UIO_MAPS)
+ " I/O memory resources.\n");
+ break;
+ }
+
+ uiomem->memtype = UIO_MEM_PHYS;
+ uiomem->addr = r->start;
+ uiomem->size = resource_size(r);
+ ++uiomem;
+ }
+
+ priv->dmem_region_start = i;
+ priv->num_dmem_regions = pdata->num_dynamic_regions;
+
+ for (i = 0; i < pdata->num_dynamic_regions; ++i) {
+ if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
+ dev_warn(&pdev->dev, "device has more than "
+ __stringify(MAX_UIO_MAPS)
+ " dynamic and fixed memory regions.\n");
+ break;
+ }
+ uiomem->memtype = UIO_MEM_PHYS;
+ uiomem->addr = DMEM_MAP_ERROR;
+ uiomem->size = pdata->dynamic_region_sizes[i];
+ ++uiomem;
+ }
+
+ while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) {
+ uiomem->size = 0;
+ ++uiomem;
+ }
+
+ /* This driver requires no hardware specific kernel code to handle
+ * interrupts. Instead, the interrupt handler simply disables the
+ * interrupt in the interrupt controller. User space is responsible
+ * for performing hardware specific acknowledge and re-enabling of
+ * the interrupt in the interrupt controller.
+ *
+ * Interrupt sharing is not supported.
+ */
+
+ uioinfo->handler = uio_dmem_genirq_handler;
+ uioinfo->irqcontrol = uio_dmem_genirq_irqcontrol;
+ uioinfo->open = uio_dmem_genirq_open;
+ uioinfo->release = uio_dmem_genirq_release;
+ uioinfo->priv = priv;
+
+ /* Enable Runtime PM for this device:
+ * The device starts in suspended state to allow the hardware to be
+ * turned off by default. The Runtime PM bus code should power on the
+ * hardware and enable clocks at open().
+ */
+ pm_runtime_enable(&pdev->dev);
+
+ ret = uio_register_device(&pdev->dev, priv->uioinfo);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register uio device\n");
+ pm_runtime_disable(&pdev->dev);
+ goto bad1;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ return 0;
+ bad1:
+ kfree(priv);
+ bad0:
+ /* kfree uioinfo for OF */
+ if (pdev->dev.of_node)
+ kfree(uioinfo);
+ bad2:
+ return ret;
+}
+
+static int uio_dmem_genirq_remove(struct platform_device *pdev)
+{
+ struct uio_dmem_genirq_platdata *priv = platform_get_drvdata(pdev);
+
+ uio_unregister_device(priv->uioinfo);
+ pm_runtime_disable(&pdev->dev);
+
+ priv->uioinfo->handler = NULL;
+ priv->uioinfo->irqcontrol = NULL;
+
+ /* kfree uioinfo for OF */
+ if (pdev->dev.of_node)
+ kfree(priv->uioinfo);
+
+ kfree(priv);
+ return 0;
+}
+
+static int uio_dmem_genirq_runtime_nop(struct device *dev)
+{
+ /* Runtime PM callback shared between ->runtime_suspend()
+ * and ->runtime_resume(). Simply returns success.
+ *
+ * In this driver pm_runtime_get_sync() and pm_runtime_put_sync()
+ * are used at open() and release() time. This allows the
+ * Runtime PM code to turn off power to the device while the
+ * device is unused, ie before open() and after release().
+ *
+ * This Runtime PM callback does not need to save or restore
+ * any registers since user space is responsbile for hardware
+ * register reinitialization after open().
+ */
+ return 0;
+}
+
+static const struct dev_pm_ops uio_dmem_genirq_dev_pm_ops = {
+ .runtime_suspend = uio_dmem_genirq_runtime_nop,
+ .runtime_resume = uio_dmem_genirq_runtime_nop,
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id uio_of_genirq_match[] = {
+ { /* empty for now */ },
+};
+MODULE_DEVICE_TABLE(of, uio_of_genirq_match);
+#endif
+
+static struct platform_driver uio_dmem_genirq = {
+ .probe = uio_dmem_genirq_probe,
+ .remove = uio_dmem_genirq_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &uio_dmem_genirq_dev_pm_ops,
+ .of_match_table = of_match_ptr(uio_of_genirq_match),
+ },
+};
+
+module_platform_driver(uio_dmem_genirq);
+
+MODULE_AUTHOR("Damian Hobson-Garcia");
+MODULE_DESCRIPTION("Userspace I/O platform driver with dynamic memory.");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/uio/uio_mf624.c b/drivers/uio/uio_mf624.c
new file mode 100644
index 00000000000..d1f95a1567b
--- /dev/null
+++ b/drivers/uio/uio_mf624.c
@@ -0,0 +1,246 @@
+/*
+ * UIO driver fo Humusoft MF624 DAQ card.
+ * Copyright (C) 2011 Rostislav Lisovy <lisovy@gmail.com>,
+ * Czech Technical University in Prague
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/uio_driver.h>
+
+#define PCI_VENDOR_ID_HUMUSOFT 0x186c
+#define PCI_DEVICE_ID_MF624 0x0624
+#define PCI_SUBVENDOR_ID_HUMUSOFT 0x186c
+#define PCI_SUBDEVICE_DEVICE 0x0624
+
+/* BAR0 Interrupt control/status register */
+#define INTCSR 0x4C
+#define INTCSR_ADINT_ENABLE (1 << 0)
+#define INTCSR_CTR4INT_ENABLE (1 << 3)
+#define INTCSR_PCIINT_ENABLE (1 << 6)
+#define INTCSR_ADINT_STATUS (1 << 2)
+#define INTCSR_CTR4INT_STATUS (1 << 5)
+
+enum mf624_interrupt_source {ADC, CTR4, ALL};
+
+static void mf624_disable_interrupt(enum mf624_interrupt_source source,
+ struct uio_info *info)
+{
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
+
+ switch (source) {
+ case ADC:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_ADINT_ENABLE | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
+
+ case CTR4:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_CTR4INT_ENABLE | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
+
+ case ALL:
+ default:
+ iowrite32(ioread32(INTCSR_reg)
+ & ~(INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE
+ | INTCSR_PCIINT_ENABLE),
+ INTCSR_reg);
+ break;
+ }
+}
+
+static void mf624_enable_interrupt(enum mf624_interrupt_source source,
+ struct uio_info *info)
+{
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
+
+ switch (source) {
+ case ADC:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_ADINT_ENABLE | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
+
+ case CTR4:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_CTR4INT_ENABLE | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
+
+ case ALL:
+ default:
+ iowrite32(ioread32(INTCSR_reg)
+ | INTCSR_ADINT_ENABLE | INTCSR_CTR4INT_ENABLE
+ | INTCSR_PCIINT_ENABLE,
+ INTCSR_reg);
+ break;
+ }
+}
+
+static irqreturn_t mf624_irq_handler(int irq, struct uio_info *info)
+{
+ void __iomem *INTCSR_reg = info->mem[0].internal_addr + INTCSR;
+
+ if ((ioread32(INTCSR_reg) & INTCSR_ADINT_ENABLE)
+ && (ioread32(INTCSR_reg) & INTCSR_ADINT_STATUS)) {
+ mf624_disable_interrupt(ADC, info);
+ return IRQ_HANDLED;
+ }
+
+ if ((ioread32(INTCSR_reg) & INTCSR_CTR4INT_ENABLE)
+ && (ioread32(INTCSR_reg) & INTCSR_CTR4INT_STATUS)) {
+ mf624_disable_interrupt(CTR4, info);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static int mf624_irqcontrol(struct uio_info *info, s32 irq_on)
+{
+ if (irq_on == 0)
+ mf624_disable_interrupt(ALL, info);
+ else if (irq_on == 1)
+ mf624_enable_interrupt(ALL, info);
+
+ return 0;
+}
+
+static int mf624_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ struct uio_info *info;
+
+ info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (pci_enable_device(dev))
+ goto out_free;
+
+ if (pci_request_regions(dev, "mf624"))
+ goto out_disable;
+
+ info->name = "mf624";
+ info->version = "0.0.1";
+
+ /* Note: Datasheet says device uses BAR0, BAR1, BAR2 -- do not trust it */
+
+ /* BAR0 */
+ info->mem[0].name = "PCI chipset, interrupts, status "
+ "bits, special functions";
+ info->mem[0].addr = pci_resource_start(dev, 0);
+ if (!info->mem[0].addr)
+ goto out_release;
+ info->mem[0].size = pci_resource_len(dev, 0);
+ info->mem[0].memtype = UIO_MEM_PHYS;
+ info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
+ if (!info->mem[0].internal_addr)
+ goto out_release;
+
+ /* BAR2 */
+ info->mem[1].name = "ADC, DAC, DIO";
+ info->mem[1].addr = pci_resource_start(dev, 2);
+ if (!info->mem[1].addr)
+ goto out_unmap0;
+ info->mem[1].size = pci_resource_len(dev, 2);
+ info->mem[1].memtype = UIO_MEM_PHYS;
+ info->mem[1].internal_addr = pci_ioremap_bar(dev, 2);
+ if (!info->mem[1].internal_addr)
+ goto out_unmap0;
+
+ /* BAR4 */
+ info->mem[2].name = "Counter/timer chip";
+ info->mem[2].addr = pci_resource_start(dev, 4);
+ if (!info->mem[2].addr)
+ goto out_unmap1;
+ info->mem[2].size = pci_resource_len(dev, 4);
+ info->mem[2].memtype = UIO_MEM_PHYS;
+ info->mem[2].internal_addr = pci_ioremap_bar(dev, 4);
+ if (!info->mem[2].internal_addr)
+ goto out_unmap1;
+
+ info->irq = dev->irq;
+ info->irq_flags = IRQF_SHARED;
+ info->handler = mf624_irq_handler;
+
+ info->irqcontrol = mf624_irqcontrol;
+
+ if (uio_register_device(&dev->dev, info))
+ goto out_unmap2;
+
+ pci_set_drvdata(dev, info);
+
+ return 0;
+
+out_unmap2:
+ iounmap(info->mem[2].internal_addr);
+out_unmap1:
+ iounmap(info->mem[1].internal_addr);
+out_unmap0:
+ iounmap(info->mem[0].internal_addr);
+
+out_release:
+ pci_release_regions(dev);
+
+out_disable:
+ pci_disable_device(dev);
+
+out_free:
+ kfree(info);
+ return -ENODEV;
+}
+
+static void mf624_pci_remove(struct pci_dev *dev)
+{
+ struct uio_info *info = pci_get_drvdata(dev);
+
+ mf624_disable_interrupt(ALL, info);
+
+ uio_unregister_device(info);
+ pci_release_regions(dev);
+ pci_disable_device(dev);
+
+ iounmap(info->mem[0].internal_addr);
+ iounmap(info->mem[1].internal_addr);
+ iounmap(info->mem[2].internal_addr);
+
+ kfree(info);
+}
+
+static const struct pci_device_id mf624_pci_id[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_HUMUSOFT, PCI_DEVICE_ID_MF624) },
+ { 0, }
+};
+
+static struct pci_driver mf624_pci_driver = {
+ .name = "mf624",
+ .id_table = mf624_pci_id,
+ .probe = mf624_pci_probe,
+ .remove = mf624_pci_remove,
+};
+MODULE_DEVICE_TABLE(pci, mf624_pci_id);
+
+module_pci_driver(mf624_pci_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Rostislav Lisovy <lisovy@gmail.com>");
diff --git a/drivers/uio/uio_netx.c b/drivers/uio/uio_netx.c
new file mode 100644
index 00000000000..4c345db8b01
--- /dev/null
+++ b/drivers/uio/uio_netx.c
@@ -0,0 +1,179 @@
+/*
+ * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
+ * See http://www.hilscher.com for details.
+ *
+ * (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
+ * (C) 2008 Manuel Traut <manut@linutronix.de>
+ *
+ * Licensed under GPL version 2 only.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/uio_driver.h>
+
+#define PCI_VENDOR_ID_HILSCHER 0x15CF
+#define PCI_DEVICE_ID_HILSCHER_NETX 0x0000
+#define PCI_DEVICE_ID_HILSCHER_NETPLC 0x0010
+#define PCI_SUBDEVICE_ID_NETPLC_RAM 0x0000
+#define PCI_SUBDEVICE_ID_NETPLC_FLASH 0x0001
+#define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235
+#define PCI_SUBDEVICE_ID_NXPCA 0x3335
+
+#define DPM_HOST_INT_EN0 0xfff0
+#define DPM_HOST_INT_STAT0 0xffe0
+
+#define DPM_HOST_INT_MASK 0xe600ffff
+#define DPM_HOST_INT_GLOBAL_EN 0x80000000
+
+static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
+{
+ void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
+ + DPM_HOST_INT_EN0;
+ void __iomem *int_status_reg = dev_info->mem[0].internal_addr
+ + DPM_HOST_INT_STAT0;
+
+ /* Is one of our interrupts enabled and active ? */
+ if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
+ & DPM_HOST_INT_MASK))
+ return IRQ_NONE;
+
+ /* Disable interrupt */
+ iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
+ int_enable_reg);
+ return IRQ_HANDLED;
+}
+
+static int netx_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ struct uio_info *info;
+ int bar;
+
+ info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if (pci_enable_device(dev))
+ goto out_free;
+
+ if (pci_request_regions(dev, "netx"))
+ goto out_disable;
+
+ switch (id->device) {
+ case PCI_DEVICE_ID_HILSCHER_NETX:
+ bar = 0;
+ info->name = "netx";
+ break;
+ case PCI_DEVICE_ID_HILSCHER_NETPLC:
+ bar = 0;
+ info->name = "netplc";
+ break;
+ default:
+ bar = 2;
+ info->name = "netx_plx";
+ }
+
+ /* BAR0 or 2 points to the card's dual port memory */
+ info->mem[0].addr = pci_resource_start(dev, bar);
+ if (!info->mem[0].addr)
+ goto out_release;
+ info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
+ pci_resource_len(dev, bar));
+
+ if (!info->mem[0].internal_addr)
+ goto out_release;
+
+ info->mem[0].size = pci_resource_len(dev, bar);
+ info->mem[0].memtype = UIO_MEM_PHYS;
+ info->irq = dev->irq;
+ info->irq_flags = IRQF_SHARED;
+ info->handler = netx_handler;
+ info->version = "0.0.1";
+
+ /* Make sure all interrupts are disabled */
+ iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
+
+ if (uio_register_device(&dev->dev, info))
+ goto out_unmap;
+
+ pci_set_drvdata(dev, info);
+ dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
+ info->name);
+
+ return 0;
+
+out_unmap:
+ iounmap(info->mem[0].internal_addr);
+out_release:
+ pci_release_regions(dev);
+out_disable:
+ pci_disable_device(dev);
+out_free:
+ kfree(info);
+ return -ENODEV;
+}
+
+static void netx_pci_remove(struct pci_dev *dev)
+{
+ struct uio_info *info = pci_get_drvdata(dev);
+
+ /* Disable all interrupts */
+ iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
+ uio_unregister_device(info);
+ pci_release_regions(dev);
+ pci_disable_device(dev);
+ iounmap(info->mem[0].internal_addr);
+
+ kfree(info);
+}
+
+static struct pci_device_id netx_pci_ids[] = {
+ {
+ .vendor = PCI_VENDOR_ID_HILSCHER,
+ .device = PCI_DEVICE_ID_HILSCHER_NETX,
+ .subvendor = 0,
+ .subdevice = 0,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_HILSCHER,
+ .device = PCI_DEVICE_ID_HILSCHER_NETPLC,
+ .subvendor = PCI_VENDOR_ID_HILSCHER,
+ .subdevice = PCI_SUBDEVICE_ID_NETPLC_RAM,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_HILSCHER,
+ .device = PCI_DEVICE_ID_HILSCHER_NETPLC,
+ .subvendor = PCI_VENDOR_ID_HILSCHER,
+ .subdevice = PCI_SUBDEVICE_ID_NETPLC_FLASH,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_PLX,
+ .device = PCI_DEVICE_ID_PLX_9030,
+ .subvendor = PCI_VENDOR_ID_PLX,
+ .subdevice = PCI_SUBDEVICE_ID_NXSB_PCA,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_PLX,
+ .device = PCI_DEVICE_ID_PLX_9030,
+ .subvendor = PCI_VENDOR_ID_PLX,
+ .subdevice = PCI_SUBDEVICE_ID_NXPCA,
+ },
+ { 0, }
+};
+
+static struct pci_driver netx_pci_driver = {
+ .name = "netx",
+ .id_table = netx_pci_ids,
+ .probe = netx_pci_probe,
+ .remove = netx_pci_remove,
+};
+
+module_pci_driver(netx_pci_driver);
+MODULE_DEVICE_TABLE(pci, netx_pci_ids);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Hans J. Koch, Manuel Traut");
diff --git a/drivers/uio/uio_pci_generic.c b/drivers/uio/uio_pci_generic.c
new file mode 100644
index 00000000000..077ae12269c
--- /dev/null
+++ b/drivers/uio/uio_pci_generic.c
@@ -0,0 +1,127 @@
+/* uio_pci_generic - generic UIO driver for PCI 2.3 devices
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ * Author: Michael S. Tsirkin <mst@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ * Since the driver does not declare any device ids, you must allocate
+ * id and bind the device to the driver yourself. For example:
+ *
+ * # echo "8086 10f5" > /sys/bus/pci/drivers/uio_pci_generic/new_id
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
+ * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
+ * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
+ *
+ * Driver won't bind to devices which do not support the Interrupt Disable Bit
+ * in the command register. All devices compliant to PCI 2.3 (circa 2002) and
+ * all compliant PCI Express devices should support this bit.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/uio_driver.h>
+
+#define DRIVER_VERSION "0.01.0"
+#define DRIVER_AUTHOR "Michael S. Tsirkin <mst@redhat.com>"
+#define DRIVER_DESC "Generic UIO driver for PCI 2.3 devices"
+
+struct uio_pci_generic_dev {
+ struct uio_info info;
+ struct pci_dev *pdev;
+};
+
+static inline struct uio_pci_generic_dev *
+to_uio_pci_generic_dev(struct uio_info *info)
+{
+ return container_of(info, struct uio_pci_generic_dev, info);
+}
+
+/* Interrupt handler. Read/modify/write the command register to disable
+ * the interrupt. */
+static irqreturn_t irqhandler(int irq, struct uio_info *info)
+{
+ struct uio_pci_generic_dev *gdev = to_uio_pci_generic_dev(info);
+
+ if (!pci_check_and_mask_intx(gdev->pdev))
+ return IRQ_NONE;
+
+ /* UIO core will signal the user process. */
+ return IRQ_HANDLED;
+}
+
+static int probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct uio_pci_generic_dev *gdev;
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
+ __func__, err);
+ return err;
+ }
+
+ if (!pdev->irq) {
+ dev_warn(&pdev->dev, "No IRQ assigned to device: "
+ "no support for interrupts?\n");
+ pci_disable_device(pdev);
+ return -ENODEV;
+ }
+
+ if (!pci_intx_mask_supported(pdev)) {
+ err = -ENODEV;
+ goto err_verify;
+ }
+
+ gdev = kzalloc(sizeof(struct uio_pci_generic_dev), GFP_KERNEL);
+ if (!gdev) {
+ err = -ENOMEM;
+ goto err_alloc;
+ }
+
+ gdev->info.name = "uio_pci_generic";
+ gdev->info.version = DRIVER_VERSION;
+ gdev->info.irq = pdev->irq;
+ gdev->info.irq_flags = IRQF_SHARED;
+ gdev->info.handler = irqhandler;
+ gdev->pdev = pdev;
+
+ if (uio_register_device(&pdev->dev, &gdev->info))
+ goto err_register;
+ pci_set_drvdata(pdev, gdev);
+
+ return 0;
+err_register:
+ kfree(gdev);
+err_alloc:
+err_verify:
+ pci_disable_device(pdev);
+ return err;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+ struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);
+
+ uio_unregister_device(&gdev->info);
+ pci_disable_device(pdev);
+ kfree(gdev);
+}
+
+static struct pci_driver uio_pci_driver = {
+ .name = "uio_pci_generic",
+ .id_table = NULL, /* only dynamic id's */
+ .probe = probe,
+ .remove = remove,
+};
+
+module_pci_driver(uio_pci_driver);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
diff --git a/drivers/uio/uio_pdrv.c b/drivers/uio/uio_pdrv.c
deleted file mode 100644
index d494ce9288c..00000000000
--- a/drivers/uio/uio_pdrv.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * drivers/uio/uio_pdrv.c
- *
- * Copyright (C) 2008 by Digi International Inc.
- * All rights reserved.
- *
- * 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.
- */
-#include <linux/platform_device.h>
-#include <linux/uio_driver.h>
-#include <linux/stringify.h>
-
-#define DRIVER_NAME "uio_pdrv"
-
-struct uio_platdata {
- struct uio_info *uioinfo;
-};
-
-static int uio_pdrv_probe(struct platform_device *pdev)
-{
- struct uio_info *uioinfo = pdev->dev.platform_data;
- struct uio_platdata *pdata;
- struct uio_mem *uiomem;
- int ret = -ENODEV;
- int i;
-
- if (!uioinfo || !uioinfo->name || !uioinfo->version) {
- dev_dbg(&pdev->dev, "%s: err_uioinfo\n", __func__);
- goto err_uioinfo;
- }
-
- pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
- if (!pdata) {
- ret = -ENOMEM;
- dev_dbg(&pdev->dev, "%s: err_alloc_pdata\n", __func__);
- goto err_alloc_pdata;
- }
-
- pdata->uioinfo = uioinfo;
-
- uiomem = &uioinfo->mem[0];
-
- for (i = 0; i < pdev->num_resources; ++i) {
- struct resource *r = &pdev->resource[i];
-
- if (r->flags != IORESOURCE_MEM)
- continue;
-
- if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
- dev_warn(&pdev->dev, "device has more than "
- __stringify(MAX_UIO_MAPS)
- " I/O memory resources.\n");
- break;
- }
-
- uiomem->memtype = UIO_MEM_PHYS;
- uiomem->addr = r->start;
- uiomem->size = r->end - r->start + 1;
- ++uiomem;
- }
-
- while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) {
- uiomem->size = 0;
- ++uiomem;
- }
-
- pdata->uioinfo->priv = pdata;
-
- ret = uio_register_device(&pdev->dev, pdata->uioinfo);
-
- if (ret) {
- kfree(pdata);
-err_alloc_pdata:
-err_uioinfo:
- return ret;
- }
-
- platform_set_drvdata(pdev, pdata);
-
- return 0;
-}
-
-static int uio_pdrv_remove(struct platform_device *pdev)
-{
- struct uio_platdata *pdata = platform_get_drvdata(pdev);
-
- uio_unregister_device(pdata->uioinfo);
-
- kfree(pdata);
-
- return 0;
-}
-
-static struct platform_driver uio_pdrv = {
- .probe = uio_pdrv_probe,
- .remove = uio_pdrv_remove,
- .driver = {
- .name = DRIVER_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init uio_pdrv_init(void)
-{
- return platform_driver_register(&uio_pdrv);
-}
-
-static void __exit uio_pdrv_exit(void)
-{
- platform_driver_unregister(&uio_pdrv);
-}
-module_init(uio_pdrv_init);
-module_exit(uio_pdrv_exit);
-
-MODULE_AUTHOR("Uwe Kleine-Koenig");
-MODULE_DESCRIPTION("Userspace I/O platform driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c
index 3f06818cf9f..76669313e9a 100644
--- a/drivers/uio/uio_pdrv_genirq.c
+++ b/drivers/uio/uio_pdrv_genirq.c
@@ -18,8 +18,15 @@
#include <linux/uio_driver.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
+#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/stringify.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
#define DRIVER_NAME "uio_pdrv_genirq"
@@ -27,8 +34,32 @@ struct uio_pdrv_genirq_platdata {
struct uio_info *uioinfo;
spinlock_t lock;
unsigned long flags;
+ struct platform_device *pdev;
+};
+
+/* Bits in uio_pdrv_genirq_platdata.flags */
+enum {
+ UIO_IRQ_DISABLED = 0,
};
+static int uio_pdrv_genirq_open(struct uio_info *info, struct inode *inode)
+{
+ struct uio_pdrv_genirq_platdata *priv = info->priv;
+
+ /* Wait until the Runtime PM code has woken up the device */
+ pm_runtime_get_sync(&priv->pdev->dev);
+ return 0;
+}
+
+static int uio_pdrv_genirq_release(struct uio_info *info, struct inode *inode)
+{
+ struct uio_pdrv_genirq_platdata *priv = info->priv;
+
+ /* Tell the Runtime PM code that the device has become idle */
+ pm_runtime_put_sync(&priv->pdev->dev);
+ return 0;
+}
+
static irqreturn_t uio_pdrv_genirq_handler(int irq, struct uio_info *dev_info)
{
struct uio_pdrv_genirq_platdata *priv = dev_info->priv;
@@ -37,8 +68,10 @@ static irqreturn_t uio_pdrv_genirq_handler(int irq, struct uio_info *dev_info)
* remember the state so we can allow user space to enable it later.
*/
- if (!test_and_set_bit(0, &priv->flags))
+ spin_lock(&priv->lock);
+ if (!__test_and_set_bit(UIO_IRQ_DISABLED, &priv->flags))
disable_irq_nosync(irq);
+ spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
@@ -52,16 +85,17 @@ static int uio_pdrv_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
* in the interrupt controller, but keep track of the
* state to prevent per-irq depth damage.
*
- * Serialize this operation to support multiple tasks.
+ * Serialize this operation to support multiple tasks and concurrency
+ * with irq handler on SMP systems.
*/
spin_lock_irqsave(&priv->lock, flags);
if (irq_on) {
- if (test_and_clear_bit(0, &priv->flags))
+ if (__test_and_clear_bit(UIO_IRQ_DISABLED, &priv->flags))
enable_irq(dev_info->irq);
} else {
- if (!test_and_set_bit(0, &priv->flags))
- disable_irq(dev_info->irq);
+ if (!__test_and_set_bit(UIO_IRQ_DISABLED, &priv->flags))
+ disable_irq_nosync(dev_info->irq);
}
spin_unlock_irqrestore(&priv->lock, flags);
@@ -70,33 +104,57 @@ static int uio_pdrv_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
static int uio_pdrv_genirq_probe(struct platform_device *pdev)
{
- struct uio_info *uioinfo = pdev->dev.platform_data;
+ struct uio_info *uioinfo = dev_get_platdata(&pdev->dev);
struct uio_pdrv_genirq_platdata *priv;
struct uio_mem *uiomem;
int ret = -EINVAL;
int i;
+ if (pdev->dev.of_node) {
+ /* alloc uioinfo for one device */
+ uioinfo = devm_kzalloc(&pdev->dev, sizeof(*uioinfo),
+ GFP_KERNEL);
+ if (!uioinfo) {
+ dev_err(&pdev->dev, "unable to kmalloc\n");
+ return -ENOMEM;
+ }
+ uioinfo->name = pdev->dev.of_node->name;
+ uioinfo->version = "devicetree";
+ /* Multiple IRQs are not supported */
+ }
+
if (!uioinfo || !uioinfo->name || !uioinfo->version) {
dev_err(&pdev->dev, "missing platform_data\n");
- goto bad0;
+ return ret;
}
if (uioinfo->handler || uioinfo->irqcontrol ||
uioinfo->irq_flags & IRQF_SHARED) {
dev_err(&pdev->dev, "interrupt configuration error\n");
- goto bad0;
+ return ret;
}
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv) {
- ret = -ENOMEM;
dev_err(&pdev->dev, "unable to kmalloc\n");
- goto bad0;
+ return -ENOMEM;
}
priv->uioinfo = uioinfo;
spin_lock_init(&priv->lock);
priv->flags = 0; /* interrupt is enabled to begin with */
+ priv->pdev = pdev;
+
+ if (!uioinfo->irq) {
+ ret = platform_get_irq(pdev, 0);
+ uioinfo->irq = ret;
+ if (ret == -ENXIO && pdev->dev.of_node)
+ uioinfo->irq = UIO_IRQ_NONE;
+ else if (ret < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ\n");
+ return ret;
+ }
+ }
uiomem = &uioinfo->mem[0];
@@ -115,7 +173,8 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
uiomem->memtype = UIO_MEM_PHYS;
uiomem->addr = r->start;
- uiomem->size = r->end - r->start + 1;
+ uiomem->size = resource_size(r);
+ uiomem->name = r->name;
++uiomem;
}
@@ -133,23 +192,28 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
* Interrupt sharing is not supported.
*/
- uioinfo->irq_flags |= IRQF_DISABLED;
uioinfo->handler = uio_pdrv_genirq_handler;
uioinfo->irqcontrol = uio_pdrv_genirq_irqcontrol;
+ uioinfo->open = uio_pdrv_genirq_open;
+ uioinfo->release = uio_pdrv_genirq_release;
uioinfo->priv = priv;
+ /* Enable Runtime PM for this device:
+ * The device starts in suspended state to allow the hardware to be
+ * turned off by default. The Runtime PM bus code should power on the
+ * hardware and enable clocks at open().
+ */
+ pm_runtime_enable(&pdev->dev);
+
ret = uio_register_device(&pdev->dev, priv->uioinfo);
if (ret) {
dev_err(&pdev->dev, "unable to register uio device\n");
- goto bad1;
+ pm_runtime_disable(&pdev->dev);
+ return ret;
}
platform_set_drvdata(pdev, priv);
return 0;
- bad1:
- kfree(priv);
- bad0:
- return ret;
}
static int uio_pdrv_genirq_remove(struct platform_device *pdev)
@@ -157,31 +221,58 @@ static int uio_pdrv_genirq_remove(struct platform_device *pdev)
struct uio_pdrv_genirq_platdata *priv = platform_get_drvdata(pdev);
uio_unregister_device(priv->uioinfo);
- kfree(priv);
+ pm_runtime_disable(&pdev->dev);
+
+ priv->uioinfo->handler = NULL;
+ priv->uioinfo->irqcontrol = NULL;
+
+ return 0;
+}
+
+static int uio_pdrv_genirq_runtime_nop(struct device *dev)
+{
+ /* Runtime PM callback shared between ->runtime_suspend()
+ * and ->runtime_resume(). Simply returns success.
+ *
+ * In this driver pm_runtime_get_sync() and pm_runtime_put_sync()
+ * are used at open() and release() time. This allows the
+ * Runtime PM code to turn off power to the device while the
+ * device is unused, ie before open() and after release().
+ *
+ * This Runtime PM callback does not need to save or restore
+ * any registers since user space is responsbile for hardware
+ * register reinitialization after open().
+ */
return 0;
}
+static const struct dev_pm_ops uio_pdrv_genirq_dev_pm_ops = {
+ .runtime_suspend = uio_pdrv_genirq_runtime_nop,
+ .runtime_resume = uio_pdrv_genirq_runtime_nop,
+};
+
+#ifdef CONFIG_OF
+static struct of_device_id uio_of_genirq_match[] = {
+ { /* This is filled with module_parm */ },
+ { /* Sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, uio_of_genirq_match);
+module_param_string(of_id, uio_of_genirq_match[0].compatible, 128, 0);
+MODULE_PARM_DESC(of_id, "Openfirmware id of the device to be handled by uio");
+#endif
+
static struct platform_driver uio_pdrv_genirq = {
.probe = uio_pdrv_genirq_probe,
.remove = uio_pdrv_genirq_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+ .pm = &uio_pdrv_genirq_dev_pm_ops,
+ .of_match_table = of_match_ptr(uio_of_genirq_match),
},
};
-static int __init uio_pdrv_genirq_init(void)
-{
- return platform_driver_register(&uio_pdrv_genirq);
-}
-
-static void __exit uio_pdrv_genirq_exit(void)
-{
- platform_driver_unregister(&uio_pdrv_genirq);
-}
-
-module_init(uio_pdrv_genirq_init);
-module_exit(uio_pdrv_genirq_exit);
+module_platform_driver(uio_pdrv_genirq);
MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("Userspace I/O platform driver with generic IRQ handling");
diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
new file mode 100644
index 00000000000..96c4a19b191
--- /dev/null
+++ b/drivers/uio/uio_pruss.c
@@ -0,0 +1,242 @@
+/*
+ * Programmable Real-Time Unit Sub System (PRUSS) UIO driver (uio_pruss)
+ *
+ * This driver exports PRUSS host event out interrupts and PRUSS, L3 RAM,
+ * and DDR RAM to user space for applications interacting with PRUSS firmware
+ *
+ * Copyright (C) 2010-11 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/platform_data/uio_pruss.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/genalloc.h>
+
+#define DRV_NAME "pruss_uio"
+#define DRV_VERSION "1.0"
+
+static int sram_pool_sz = SZ_16K;
+module_param(sram_pool_sz, int, 0);
+MODULE_PARM_DESC(sram_pool_sz, "sram pool size to allocate ");
+
+static int extram_pool_sz = SZ_256K;
+module_param(extram_pool_sz, int, 0);
+MODULE_PARM_DESC(extram_pool_sz, "external ram pool size to allocate");
+
+/*
+ * Host event IRQ numbers from PRUSS - PRUSS can generate up to 8 interrupt
+ * events to AINTC of ARM host processor - which can be used for IPC b/w PRUSS
+ * firmware and user space application, async notification from PRU firmware
+ * to user space application
+ * 3 PRU_EVTOUT0
+ * 4 PRU_EVTOUT1
+ * 5 PRU_EVTOUT2
+ * 6 PRU_EVTOUT3
+ * 7 PRU_EVTOUT4
+ * 8 PRU_EVTOUT5
+ * 9 PRU_EVTOUT6
+ * 10 PRU_EVTOUT7
+*/
+#define MAX_PRUSS_EVT 8
+
+#define PINTC_HIDISR 0x0038
+#define PINTC_HIPIR 0x0900
+#define HIPIR_NOPEND 0x80000000
+#define PINTC_HIER 0x1500
+
+struct uio_pruss_dev {
+ struct uio_info *info;
+ struct clk *pruss_clk;
+ dma_addr_t sram_paddr;
+ dma_addr_t ddr_paddr;
+ void __iomem *prussio_vaddr;
+ unsigned long sram_vaddr;
+ void *ddr_vaddr;
+ unsigned int hostirq_start;
+ unsigned int pintc_base;
+ struct gen_pool *sram_pool;
+};
+
+static irqreturn_t pruss_handler(int irq, struct uio_info *info)
+{
+ struct uio_pruss_dev *gdev = info->priv;
+ int intr_bit = (irq - gdev->hostirq_start + 2);
+ int val, intr_mask = (1 << intr_bit);
+ void __iomem *base = gdev->prussio_vaddr + gdev->pintc_base;
+ void __iomem *intren_reg = base + PINTC_HIER;
+ void __iomem *intrdis_reg = base + PINTC_HIDISR;
+ void __iomem *intrstat_reg = base + PINTC_HIPIR + (intr_bit << 2);
+
+ val = ioread32(intren_reg);
+ /* Is interrupt enabled and active ? */
+ if (!(val & intr_mask) && (ioread32(intrstat_reg) & HIPIR_NOPEND))
+ return IRQ_NONE;
+ /* Disable interrupt */
+ iowrite32(intr_bit, intrdis_reg);
+ return IRQ_HANDLED;
+}
+
+static void pruss_cleanup(struct platform_device *dev,
+ struct uio_pruss_dev *gdev)
+{
+ int cnt;
+ struct uio_info *p = gdev->info;
+
+ for (cnt = 0; cnt < MAX_PRUSS_EVT; cnt++, p++) {
+ uio_unregister_device(p);
+ kfree(p->name);
+ }
+ iounmap(gdev->prussio_vaddr);
+ if (gdev->ddr_vaddr) {
+ dma_free_coherent(&dev->dev, extram_pool_sz, gdev->ddr_vaddr,
+ gdev->ddr_paddr);
+ }
+ if (gdev->sram_vaddr)
+ gen_pool_free(gdev->sram_pool,
+ gdev->sram_vaddr,
+ sram_pool_sz);
+ kfree(gdev->info);
+ clk_put(gdev->pruss_clk);
+ kfree(gdev);
+}
+
+static int pruss_probe(struct platform_device *dev)
+{
+ struct uio_info *p;
+ struct uio_pruss_dev *gdev;
+ struct resource *regs_prussio;
+ int ret = -ENODEV, cnt = 0, len;
+ struct uio_pruss_pdata *pdata = dev_get_platdata(&dev->dev);
+
+ gdev = kzalloc(sizeof(struct uio_pruss_dev), GFP_KERNEL);
+ if (!gdev)
+ return -ENOMEM;
+
+ gdev->info = kzalloc(sizeof(*p) * MAX_PRUSS_EVT, GFP_KERNEL);
+ if (!gdev->info) {
+ kfree(gdev);
+ return -ENOMEM;
+ }
+ /* Power on PRU in case its not done as part of boot-loader */
+ gdev->pruss_clk = clk_get(&dev->dev, "pruss");
+ if (IS_ERR(gdev->pruss_clk)) {
+ dev_err(&dev->dev, "Failed to get clock\n");
+ ret = PTR_ERR(gdev->pruss_clk);
+ kfree(gdev->info);
+ kfree(gdev);
+ return ret;
+ } else {
+ clk_enable(gdev->pruss_clk);
+ }
+
+ regs_prussio = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!regs_prussio) {
+ dev_err(&dev->dev, "No PRUSS I/O resource specified\n");
+ goto out_free;
+ }
+
+ if (!regs_prussio->start) {
+ dev_err(&dev->dev, "Invalid memory resource\n");
+ goto out_free;
+ }
+
+ if (pdata->sram_pool) {
+ gdev->sram_pool = pdata->sram_pool;
+ gdev->sram_vaddr =
+ (unsigned long)gen_pool_dma_alloc(gdev->sram_pool,
+ sram_pool_sz, &gdev->sram_paddr);
+ if (!gdev->sram_vaddr) {
+ dev_err(&dev->dev, "Could not allocate SRAM pool\n");
+ goto out_free;
+ }
+ }
+
+ gdev->ddr_vaddr = dma_alloc_coherent(&dev->dev, extram_pool_sz,
+ &(gdev->ddr_paddr), GFP_KERNEL | GFP_DMA);
+ if (!gdev->ddr_vaddr) {
+ dev_err(&dev->dev, "Could not allocate external memory\n");
+ goto out_free;
+ }
+
+ len = resource_size(regs_prussio);
+ gdev->prussio_vaddr = ioremap(regs_prussio->start, len);
+ if (!gdev->prussio_vaddr) {
+ dev_err(&dev->dev, "Can't remap PRUSS I/O address range\n");
+ goto out_free;
+ }
+
+ gdev->pintc_base = pdata->pintc_base;
+ gdev->hostirq_start = platform_get_irq(dev, 0);
+
+ for (cnt = 0, p = gdev->info; cnt < MAX_PRUSS_EVT; cnt++, p++) {
+ p->mem[0].addr = regs_prussio->start;
+ p->mem[0].size = resource_size(regs_prussio);
+ p->mem[0].memtype = UIO_MEM_PHYS;
+
+ p->mem[1].addr = gdev->sram_paddr;
+ p->mem[1].size = sram_pool_sz;
+ p->mem[1].memtype = UIO_MEM_PHYS;
+
+ p->mem[2].addr = gdev->ddr_paddr;
+ p->mem[2].size = extram_pool_sz;
+ p->mem[2].memtype = UIO_MEM_PHYS;
+
+ p->name = kasprintf(GFP_KERNEL, "pruss_evt%d", cnt);
+ p->version = DRV_VERSION;
+
+ /* Register PRUSS IRQ lines */
+ p->irq = gdev->hostirq_start + cnt;
+ p->handler = pruss_handler;
+ p->priv = gdev;
+
+ ret = uio_register_device(&dev->dev, p);
+ if (ret < 0)
+ goto out_free;
+ }
+
+ platform_set_drvdata(dev, gdev);
+ return 0;
+
+out_free:
+ pruss_cleanup(dev, gdev);
+ return ret;
+}
+
+static int pruss_remove(struct platform_device *dev)
+{
+ struct uio_pruss_dev *gdev = platform_get_drvdata(dev);
+
+ pruss_cleanup(dev, gdev);
+ return 0;
+}
+
+static struct platform_driver pruss_driver = {
+ .probe = pruss_probe,
+ .remove = pruss_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(pruss_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Amit Chatterjee <amit.chatterjee@ti.com>");
+MODULE_AUTHOR("Pratheesh Gangadhar <pratheesh@ti.com>");
diff --git a/drivers/uio/uio_sercos3.c b/drivers/uio/uio_sercos3.c
index a6d1b2bc47f..9cfdfcafa26 100644
--- a/drivers/uio/uio_sercos3.c
+++ b/drivers/uio/uio_sercos3.c
@@ -28,6 +28,7 @@
#include <linux/pci.h>
#include <linux/uio_driver.h>
#include <linux/io.h>
+#include <linux/slab.h>
/* ID's for SERCOS III PCI card (PLX 9030) */
#define SERCOS_SUB_VENDOR_ID 0x1971
@@ -115,7 +116,7 @@ static int sercos3_setup_iomem(struct pci_dev *dev, struct uio_info *info,
return 0;
}
-static int __devinit sercos3_pci_probe(struct pci_dev *dev,
+static int sercos3_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct uio_info *info;
@@ -153,7 +154,7 @@ static int __devinit sercos3_pci_probe(struct pci_dev *dev,
info->name = "Sercos_III_PCI";
info->version = "0.0.1";
info->irq = dev->irq;
- info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
+ info->irq_flags = IRQF_SHARED;
info->handler = sercos3_handler;
info->irqcontrol = sercos3_irqcontrol;
@@ -187,7 +188,6 @@ static void sercos3_pci_remove(struct pci_dev *dev)
uio_unregister_device(info);
pci_release_regions(dev);
pci_disable_device(dev);
- pci_set_drvdata(dev, NULL);
for (i = 0; i < 5; i++) {
if (info->mem[i].internal_addr)
iounmap(info->mem[i].internal_addr);
@@ -196,7 +196,7 @@ static void sercos3_pci_remove(struct pci_dev *dev)
kfree(info);
}
-static struct pci_device_id sercos3_pci_ids[] __devinitdata = {
+static struct pci_device_id sercos3_pci_ids[] = {
{
.vendor = PCI_VENDOR_ID_PLX,
.device = PCI_DEVICE_ID_PLX_9030,
@@ -225,19 +225,7 @@ static struct pci_driver sercos3_pci_driver = {
.remove = sercos3_pci_remove,
};
-static int __init sercos3_init_module(void)
-{
- return pci_register_driver(&sercos3_pci_driver);
-}
-
-static void __exit sercos3_exit_module(void)
-{
- pci_unregister_driver(&sercos3_pci_driver);
-}
-
-module_init(sercos3_init_module);
-module_exit(sercos3_exit_module);
-
+module_pci_driver(sercos3_pci_driver);
MODULE_DESCRIPTION("UIO driver for the Automata Sercos III PCI card");
MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/uio/uio_smx.c b/drivers/uio/uio_smx.c
deleted file mode 100644
index 44054a650a8..00000000000
--- a/drivers/uio/uio_smx.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * UIO SMX Cryptengine driver.
- *
- * (C) 2008 Nias Digital P/L <bn@niasdigital.com>
- *
- * 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.
- *
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/uio_driver.h>
-#include <linux/io.h>
-
-#define DRV_NAME "smx-ce"
-#define DRV_VERSION "0.03"
-
-#define SMX_CSR 0x00000000
-#define SMX_EnD 0x00000001
-#define SMX_RUN 0x00000002
-#define SMX_DRDY 0x00000004
-#define SMX_ERR 0x00000008
-
-static irqreturn_t smx_handler(int irq, struct uio_info *dev_info)
-{
- void __iomem *csr = dev_info->mem[0].internal_addr + SMX_CSR;
-
- u32 status = ioread32(csr);
-
- if (!(status & SMX_DRDY))
- return IRQ_NONE;
-
- /* Disable interrupt */
- iowrite32(status & ~SMX_DRDY, csr);
- return IRQ_HANDLED;
-}
-
-static int __devinit smx_ce_probe(struct platform_device *dev)
-{
-
- int ret = -ENODEV;
- struct uio_info *info;
- struct resource *regs;
-
- info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_err(&dev->dev, "No memory resource specified\n");
- goto out_free;
- }
-
- info->mem[0].addr = regs->start;
- if (!info->mem[0].addr) {
- dev_err(&dev->dev, "Invalid memory resource\n");
- goto out_free;
- }
-
- info->mem[0].size = regs->end - regs->start + 1;
- info->mem[0].internal_addr = ioremap(regs->start, info->mem[0].size);
-
- if (!info->mem[0].internal_addr) {
- dev_err(&dev->dev, "Can't remap memory address range\n");
- goto out_free;
- }
-
- info->mem[0].memtype = UIO_MEM_PHYS;
-
- info->name = "smx-ce";
- info->version = "0.03";
-
- info->irq = platform_get_irq(dev, 0);
- if (info->irq < 0) {
- ret = info->irq;
- dev_err(&dev->dev, "No (or invalid) IRQ resource specified\n");
- goto out_unmap;
- }
-
- info->irq_flags = IRQF_SHARED;
- info->handler = smx_handler;
-
- platform_set_drvdata(dev, info);
-
- ret = uio_register_device(&dev->dev, info);
-
- if (ret)
- goto out_unmap;
-
- return 0;
-
-out_unmap:
- iounmap(info->mem[0].internal_addr);
-out_free:
- kfree(info);
-
- return ret;
-}
-
-static int __devexit smx_ce_remove(struct platform_device *dev)
-{
- struct uio_info *info = platform_get_drvdata(dev);
-
- uio_unregister_device(info);
- platform_set_drvdata(dev, NULL);
- iounmap(info->mem[0].internal_addr);
-
- kfree(info);
-
- return 0;
-}
-
-static struct platform_driver smx_ce_driver = {
- .probe = smx_ce_probe,
- .remove = __devexit_p(smx_ce_remove),
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init smx_ce_init_module(void)
-{
- return platform_driver_register(&smx_ce_driver);
-}
-module_init(smx_ce_init_module);
-
-static void __exit smx_ce_exit_module(void)
-{
- platform_driver_unregister(&smx_ce_driver);
-}
-module_exit(smx_ce_exit_module);
-
-MODULE_LICENSE("GPL v2");
-MODULE_VERSION(DRV_VERSION);
-MODULE_AUTHOR("Ben Nizette <bn@niasdigital.com>");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 22:11:02 +0000