#include "../vme.h"
#include "vme_user.h"
+static char driver_name[] = "vme_user";
+
+static int bus[USER_BUS_MAX];
+static int bus_num;
+
/* Currently Documentation/devices.txt defines the following for VME:
*
* 221 char VME bus
* defined above and try to support at least some of the interface from
* http://www.vmelinux.org/ as an alternative drive can be written providing a
* saner interface later.
+ *
+ * The vmelinux.org driver never supported slave images, the devices reserved
+ * for slaves were repurposed to support all 8 master images on the UniverseII!
+ * We shall support 4 masters and 4 slaves with this driver.
*/
#define VME_MAJOR 221 /* VME Major Device Number */
#define VME_DEVS 9 /* Number of dev entries */
struct class *vme_user_sysfs_class; /* Sysfs class */
struct device *vme_user_bridge; /* Pointer to the bridge device */
-static char driver_name[] = "vme_user";
static const int type[VME_DEVS] = { MASTER_MINOR, MASTER_MINOR,
MASTER_MINOR, MASTER_MINOR,
static int vme_user_ioctl(struct inode *, struct file *, unsigned int,
unsigned long);
-static int __init vme_user_probe(struct device *dev);
+static int __init vme_user_probe(struct device *, int, int);
+static int __exit vme_user_remove(struct device *, int, int);
static struct file_operations vme_user_fops = {
.open = vme_user_open,
statistics.timeouts = 0;
}
-void lmcall(int monitor)
-{
- printk("Caught Location Monitor %d access\n", monitor);
-}
-
-static void tests(void)
-{
- struct vme_resource *dma_res;
- struct vme_dma_list *dma_list;
- struct vme_dma_attr *pattern_attr, *vme_attr;
-
- int retval;
- unsigned int data;
-
- printk("Running VME DMA test\n");
- dma_res = vme_request_dma(vme_user_bridge);
- dma_list = vme_new_dma_list(dma_res);
- pattern_attr = vme_dma_pattern_attribute(0x0,
- VME_DMA_PATTERN_WORD |
- VME_DMA_PATTERN_INCREMENT);
- vme_attr = vme_dma_vme_attribute(0x10000, VME_A32,
- VME_SCT, VME_D32);
- retval = vme_dma_list_add(dma_list, pattern_attr,
- vme_attr, 0x10000);
-#if 0
- vme_dma_free_attribute(vme_attr);
- vme_attr = vme_dma_vme_attribute(0x20000, VME_A32,
- VME_SCT, VME_D32);
- retval = vme_dma_list_add(dma_list, pattern_attr,
- vme_attr, 0x10000);
-#endif
- retval = vme_dma_list_exec(dma_list);
- vme_dma_free_attribute(pattern_attr);
- vme_dma_free_attribute(vme_attr);
- vme_dma_list_free(dma_list);
-#if 0
- printk("Generating a VME interrupt\n");
- vme_generate_irq(dma_res, 0x3, 0xaa);
- printk("Interrupt returned\n");
-#endif
- vme_dma_free(dma_res);
-
- /* Attempt RMW */
- data = vme_master_rmw(image[0].resource, 0x80000000, 0x00000000,
- 0x80000000, 0);
- printk("RMW returned 0x%8.8x\n", data);
-
-
- /* Location Monitor */
- printk("vme_lm_set:%d\n", vme_lm_set(vme_user_bridge, 0x60000, VME_A32, VME_SCT | VME_USER | VME_DATA));
- printk("vme_lm_attach:%d\n", vme_lm_attach(vme_user_bridge, 0, lmcall));
-
- printk("Board in VME slot:%d\n", vme_slot_get(vme_user_bridge));
-}
-
static int vme_user_open(struct inode *inode, struct file *file)
{
int err;
return -EINVAL;
}
+/*
+ * The ioctls provided by the old VME access method (the one at vmelinux.org)
+ * are most certainly wrong as the effectively push the registers layout
+ * through to user space. Given that the VME core can handle multiple bridges,
+ * with different register layouts this is most certainly not the way to go.
+ *
+ * We aren't using the structures defined in the Motorola driver either - these
+ * are also quite low level, however we should use the definitions that have
+ * already been defined.
+ */
static int vme_user_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
+ struct vme_master master;
+ struct vme_slave slave;
+ unsigned long copied;
unsigned int minor = MINOR(inode->i_rdev);
-#if 0
- int ret_val;
-#endif
- unsigned long copyRet;
- vme_slave_t slave;
+ int retval;
+ dma_addr_t pci_addr;
statistics.ioctls++;
+
switch (type[minor]) {
case CONTROL_MINOR:
break;
case MASTER_MINOR:
- break;
- case SLAVE_MINOR:
switch (cmd) {
- case VME_SET_SLAVE:
+ case VME_GET_MASTER:
+ memset(&master, 0, sizeof(struct vme_master));
+
+ /* XXX We do not want to push aspace, cycle and width
+ * to userspace as they are
+ */
+ retval = vme_master_get(image[minor].resource,
+ &(master.enable), &(master.vme_addr),
+ &(master.size), &(master.aspace),
+ &(master.cycle), &(master.dwidth));
+
+ copied = copy_to_user((char *)arg, &master,
+ sizeof(struct vme_master));
+ if (copied != 0) {
+ printk(KERN_WARNING "Partial copy to "
+ "userspace\n");
+ return -EFAULT;
+ }
- copyRet = copy_from_user(&slave, (char *)arg,
- sizeof(slave));
- if (copyRet != 0) {
+ return retval;
+ break;
+
+ case VME_SET_MASTER:
+
+ copied = copy_from_user(&master, (char *)arg,
+ sizeof(master));
+ if (copied != 0) {
printk(KERN_WARNING "Partial copy from "
"userspace\n");
return -EFAULT;
}
- return vme_slave_set(image[minor].resource,
- slave.enable, slave.vme_addr, slave.size,
- image[minor].pci_buf, slave.aspace,
- slave.cycle);
+ /* XXX We do not want to push aspace, cycle and width
+ * to userspace as they are
+ */
+ return vme_master_set(image[minor].resource,
+ master.enable, master.vme_addr, master.size,
+ master.aspace, master.cycle, master.dwidth);
break;
-#if 0
+ }
+ break;
+ case SLAVE_MINOR:
+ switch (cmd) {
case VME_GET_SLAVE:
- vme_slave_t slave;
+ memset(&slave, 0, sizeof(struct vme_slave));
+
+ /* XXX We do not want to push aspace, cycle and width
+ * to userspace as they are
+ */
+ retval = vme_slave_get(image[minor].resource,
+ &(slave.enable), &(slave.vme_addr),
+ &(slave.size), &pci_addr, &(slave.aspace),
+ &(slave.cycle));
+
+ copied = copy_to_user((char *)arg, &slave,
+ sizeof(struct vme_slave));
+ if (copied != 0) {
+ printk(KERN_WARNING "Partial copy to "
+ "userspace\n");
+ return -EFAULT;
+ }
+
+ return retval;
+ break;
- ret_val = vme_slave_get(minor, &iRegs);
+ case VME_SET_SLAVE:
- copyRet = copy_to_user((char *)arg, &slave,
+ copied = copy_from_user(&slave, (char *)arg,
sizeof(slave));
- if (copyRet != 0) {
- printk(KERN_WARNING "Partial copy to "
+ if (copied != 0) {
+ printk(KERN_WARNING "Partial copy from "
"userspace\n");
return -EFAULT;
}
- return ret_val;
+ /* XXX We do not want to push aspace, cycle and width
+ * to userspace as they are
+ */
+ return vme_slave_set(image[minor].resource,
+ slave.enable, slave.vme_addr, slave.size,
+ image[minor].pci_buf, slave.aspace,
+ slave.cycle);
+
break;
-#endif
}
break;
}
static struct vme_driver vme_user_driver = {
.name = driver_name,
.probe = vme_user_probe,
+ .remove = vme_user_remove,
};
-/*
- * In this simple access driver, the old behaviour is being preserved as much
- * as practical. We will therefore reserve the buffers and request the images
- * here so that we don't have to do it later.
- */
-static int __init vme_bridge_init(void)
+static int __init vme_user_init(void)
{
- int retval;
+ int retval = 0;
+ int i;
+ struct vme_device_id *ids;
+
printk(KERN_INFO "VME User Space Access Driver\n");
- printk("vme_user_driver:%p\n", &vme_user_driver);
+
+ if (bus_num == 0) {
+ printk(KERN_ERR "%s: No cards, skipping registration\n",
+ driver_name);
+ goto err_nocard;
+ }
+
+ /* Let's start by supporting one bus, we can support more than one
+ * in future revisions if that ever becomes necessary.
+ */
+ if (bus_num > USER_BUS_MAX) {
+ printk(KERN_ERR "%s: Driver only able to handle %d PIO2 "
+ "Cards\n", driver_name, USER_BUS_MAX);
+ bus_num = USER_BUS_MAX;
+ }
+
+
+ /* Dynamically create the bind table based on module parameters */
+ ids = kmalloc(sizeof(struct vme_device_id) * (bus_num + 1), GFP_KERNEL);
+ if (ids == NULL) {
+ printk(KERN_ERR "%s: Unable to allocate ID table\n",
+ driver_name);
+ goto err_id;
+ }
+
+ memset(ids, 0, (sizeof(struct vme_device_id) * (bus_num + 1)));
+
+ for (i = 0; i < bus_num; i++) {
+ ids[i].bus = bus[i];
+ /*
+ * We register the driver against the slot occupied by *this*
+ * card, since it's really a low level way of controlling
+ * the VME bridge
+ */
+ ids[i].slot = VME_SLOT_CURRENT;
+ }
+
+ vme_user_driver.bind_table = ids;
+
retval = vme_register_driver(&vme_user_driver);
- printk("vme_register_driver returned %d\n", retval);
+ if (retval != 0)
+ goto err_reg;
+
+ return retval;
+
+ vme_unregister_driver(&vme_user_driver);
+err_reg:
+ kfree(ids);
+err_id:
+err_nocard:
return retval;
}
/*
- * This structure gets passed a device, this should be the device created at
- * registration.
+ * In this simple access driver, the old behaviour is being preserved as much
+ * as practical. We will therefore reserve the buffers and request the images
+ * here so that we don't have to do it later.
*/
-static int __init vme_user_probe(struct device *dev)
+static int __init vme_user_probe(struct device *dev, int cur_bus, int cur_slot)
{
int i, err;
char name[8];
- printk("Running vme_user_probe()\n");
-
- /* Pointer to the bridge device */
+ /* Save pointer to the bridge device */
+ if (vme_user_bridge != NULL) {
+ printk(KERN_ERR "%s: Driver can only be loaded for 1 device\n",
+ driver_name);
+ err = -EINVAL;
+ goto err_dev;
+ }
vme_user_bridge = dev;
/* Initialise descriptors */
if (image[i].resource == NULL) {
printk(KERN_WARNING "Unable to allocate slave "
"resource\n");
- goto err_buf;
+ goto err_slave;
}
image[i].size_buf = PCI_BUF_SIZE;
image[i].kern_buf = vme_alloc_consistent(image[i].resource,
image[i].pci_buf = 0;
vme_slave_free(image[i].resource);
err = -ENOMEM;
- goto err_buf;
+ goto err_slave;
}
}
if (image[i].resource == NULL) {
printk(KERN_WARNING "Unable to allocate master "
"resource\n");
- goto err_buf;
- }
- image[i].size_buf = PAGE_SIZE;
- image[i].kern_buf = vme_alloc_consistent(image[i].resource,
- image[i].size_buf, &(image[i].pci_buf));
- if (image[i].kern_buf == NULL) {
- printk(KERN_WARNING "Unable to allocate memory for "
- "buffer\n");
- image[i].pci_buf = 0;
- vme_master_free(image[i].resource);
- err = -ENOMEM;
- goto err_buf;
- }
- }
-
- /* Setup some debug windows */
- for (i = SLAVE_MINOR; i < (SLAVE_MAX + 1); i++) {
- err = vme_slave_set(image[i].resource, 1, 0x4000*(i-4),
- 0x4000, image[i].pci_buf, VME_A16,
- VME_SCT | VME_SUPER | VME_USER | VME_PROG | VME_DATA);
- if (err != 0) {
- printk(KERN_WARNING "Failed to configure window\n");
- goto err_buf;
- }
- }
- for (i = MASTER_MINOR; i < (MASTER_MAX + 1); i++) {
- err = vme_master_set(image[i].resource, 1,
- (0x10000 + (0x10000*i)), 0x10000,
- VME_A32, VME_SCT | VME_USER | VME_DATA, VME_D32);
- if (err != 0) {
- printk(KERN_WARNING "Failed to configure window\n");
- goto err_buf;
+ goto err_master;
}
}
}
}
- /* XXX Run tests */
- /*
- tests();
- */
-
return 0;
/* Ensure counter set correcty to destroy all sysfs devices */
}
class_destroy(vme_user_sysfs_class);
- /* Ensure counter set correcty to unalloc all slave buffers */
+ /* Ensure counter set correcty to unalloc all master windows */
+ i = MASTER_MAX + 1;
+err_master:
+ while (i > MASTER_MINOR) {
+ i--;
+ vme_master_free(image[i].resource);
+ }
+
+ /*
+ * Ensure counter set correcty to unalloc all slave windows and buffers
+ */
i = SLAVE_MAX + 1;
-err_buf:
- while (i > SLAVE_MINOR){
+err_slave:
+ while (i > SLAVE_MINOR) {
i--;
- vme_slave_set(image[i].resource, 0, 0, 0, 0, VME_A32, 0);
vme_slave_free(image[i].resource);
buf_unalloc(i);
}
err_char:
unregister_chrdev_region(MKDEV(VME_MAJOR, 0), VME_DEVS);
err_region:
+err_dev:
return err;
}
-static void __exit vme_bridge_exit(void)
+static int __exit vme_user_remove(struct device *dev, int cur_bus, int cur_slot)
{
int i;
class_destroy(vme_user_sysfs_class);
for (i = SLAVE_MINOR; i < (SLAVE_MAX + 1); i++) {
+ vme_slave_set(image[i].resource, 0, 0, 0, 0, VME_A32, 0);
+ vme_slave_free(image[i].resource);
buf_unalloc(i);
}
/* Unregiser the major and minor device numbers */
unregister_chrdev_region(MKDEV(VME_MAJOR, 0), VME_DEVS);
+
+ return 0;
}
+static void __exit vme_user_exit(void)
+{
+ vme_unregister_driver(&vme_user_driver);
+
+ kfree(vme_user_driver.bind_table);
+}
+
+
+MODULE_PARM_DESC(bus, "Enumeration of VMEbus to which the driver is connected");
+module_param_array(bus, int, &bus_num, 0);
+
MODULE_DESCRIPTION("VME User Space Access Driver");
MODULE_AUTHOR("Martyn Welch <martyn.welch@gefanuc.com");
MODULE_LICENSE("GPL");
-module_init(vme_bridge_init);
-module_exit(vme_bridge_exit);
+module_init(vme_user_init);
+module_exit(vme_user_exit);
projects / platform / kernel / linux-stable.git / commitdiff