b43: Add debugfs files for random SHM access
This adds debugfs files for random SHM access.
This is needed in order to implement firmware and driver debugging
scripts in userspace.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/debugfs.c b/drivers/net/wireless/b43/debugfs.c
index 9cdd9ec..dd40ad8 100644
--- a/drivers/net/wireless/b43/debugfs.c
+++ b/drivers/net/wireless/b43/debugfs.c
@@ -74,6 +74,168 @@
} while (0)
+/* The biggest address values for SHM access from the debugfs files. */
+#define B43_MAX_SHM_ROUTING 4
+#define B43_MAX_SHM_ADDR 0xFFFF
+
+static ssize_t shm16read__read_file(struct b43_wldev *dev,
+ char *buf, size_t bufsize)
+{
+ ssize_t count = 0;
+ unsigned int routing, addr;
+ u16 val;
+
+ routing = dev->dfsentry->shm16read_routing_next;
+ addr = dev->dfsentry->shm16read_addr_next;
+ if ((routing > B43_MAX_SHM_ROUTING) ||
+ (addr > B43_MAX_SHM_ADDR))
+ return -EDESTADDRREQ;
+
+ val = b43_shm_read16(dev, routing, addr);
+ fappend("0x%04X\n", val);
+
+ return count;
+}
+
+static int shm16read__write_file(struct b43_wldev *dev,
+ const char *buf, size_t count)
+{
+ unsigned int routing, addr;
+ int res;
+
+ res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
+ if (res != 2)
+ return -EINVAL;
+ if (routing > B43_MAX_SHM_ROUTING)
+ return -EADDRNOTAVAIL;
+ if (addr > B43_MAX_SHM_ADDR)
+ return -EADDRNOTAVAIL;
+ if (routing == B43_SHM_SHARED) {
+ if ((addr % 2) != 0)
+ return -EADDRNOTAVAIL;
+ }
+
+ dev->dfsentry->shm16read_routing_next = routing;
+ dev->dfsentry->shm16read_addr_next = addr;
+
+ return 0;
+}
+
+static int shm16write__write_file(struct b43_wldev *dev,
+ const char *buf, size_t count)
+{
+ unsigned int routing, addr, mask, set;
+ u16 val;
+ int res;
+ unsigned long flags;
+
+ res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
+ &routing, &addr, &mask, &set);
+ if (res != 4)
+ return -EINVAL;
+ if (routing > B43_MAX_SHM_ROUTING)
+ return -EADDRNOTAVAIL;
+ if (addr > B43_MAX_SHM_ADDR)
+ return -EADDRNOTAVAIL;
+ if (routing == B43_SHM_SHARED) {
+ if ((addr % 2) != 0)
+ return -EADDRNOTAVAIL;
+ }
+ if ((mask > 0xFFFF) || (set > 0xFFFF))
+ return -E2BIG;
+
+ spin_lock_irqsave(&dev->wl->shm_lock, flags);
+ if (mask == 0)
+ val = 0;
+ else
+ val = __b43_shm_read16(dev, routing, addr);
+ val &= mask;
+ val |= set;
+ __b43_shm_write16(dev, routing, addr, val);
+ spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
+
+ return 0;
+}
+
+static ssize_t shm32read__read_file(struct b43_wldev *dev,
+ char *buf, size_t bufsize)
+{
+ ssize_t count = 0;
+ unsigned int routing, addr;
+ u32 val;
+
+ routing = dev->dfsentry->shm32read_routing_next;
+ addr = dev->dfsentry->shm32read_addr_next;
+ if ((routing > B43_MAX_SHM_ROUTING) ||
+ (addr > B43_MAX_SHM_ADDR))
+ return -EDESTADDRREQ;
+
+ val = b43_shm_read32(dev, routing, addr);
+ fappend("0x%08X\n", val);
+
+ return count;
+}
+
+static int shm32read__write_file(struct b43_wldev *dev,
+ const char *buf, size_t count)
+{
+ unsigned int routing, addr;
+ int res;
+
+ res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
+ if (res != 2)
+ return -EINVAL;
+ if (routing > B43_MAX_SHM_ROUTING)
+ return -EADDRNOTAVAIL;
+ if (addr > B43_MAX_SHM_ADDR)
+ return -EADDRNOTAVAIL;
+ if (routing == B43_SHM_SHARED) {
+ if ((addr % 2) != 0)
+ return -EADDRNOTAVAIL;
+ }
+
+ dev->dfsentry->shm32read_routing_next = routing;
+ dev->dfsentry->shm32read_addr_next = addr;
+
+ return 0;
+}
+
+static int shm32write__write_file(struct b43_wldev *dev,
+ const char *buf, size_t count)
+{
+ unsigned int routing, addr, mask, set;
+ u32 val;
+ int res;
+ unsigned long flags;
+
+ res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
+ &routing, &addr, &mask, &set);
+ if (res != 4)
+ return -EINVAL;
+ if (routing > B43_MAX_SHM_ROUTING)
+ return -EADDRNOTAVAIL;
+ if (addr > B43_MAX_SHM_ADDR)
+ return -EADDRNOTAVAIL;
+ if (routing == B43_SHM_SHARED) {
+ if ((addr % 2) != 0)
+ return -EADDRNOTAVAIL;
+ }
+ if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
+ return -E2BIG;
+
+ spin_lock_irqsave(&dev->wl->shm_lock, flags);
+ if (mask == 0)
+ val = 0;
+ else
+ val = __b43_shm_read32(dev, routing, addr);
+ val &= mask;
+ val |= set;
+ __b43_shm_write32(dev, routing, addr, val);
+ spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
+
+ return 0;
+}
+
/* The biggest MMIO address that we allow access to from the debugfs files. */
#define B43_MAX_MMIO_ACCESS (0xF00 - 1)
@@ -605,6 +767,10 @@
.take_irqlock = _take_irqlock, \
}
+B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
+B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
+B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
+B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
@@ -699,6 +865,10 @@
e->mmio16read_next = 0xFFFF; /* invalid address */
e->mmio32read_next = 0xFFFF; /* invalid address */
+ e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
+ e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
+ e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
+ e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
#define ADD_FILE(name, mode) \
do { \
@@ -712,6 +882,10 @@
} while (0)
+ ADD_FILE(shm16read, 0600);
+ ADD_FILE(shm16write, 0200);
+ ADD_FILE(shm32read, 0600);
+ ADD_FILE(shm32write, 0200);
ADD_FILE(mmio16read, 0600);
ADD_FILE(mmio16write, 0200);
ADD_FILE(mmio32read, 0600);
@@ -740,6 +914,10 @@
return;
b43_remove_dynamic_debug(dev);
+ debugfs_remove(e->file_shm16read.dentry);
+ debugfs_remove(e->file_shm16write.dentry);
+ debugfs_remove(e->file_shm32read.dentry);
+ debugfs_remove(e->file_shm32write.dentry);
debugfs_remove(e->file_mmio16read.dentry);
debugfs_remove(e->file_mmio16write.dentry);
debugfs_remove(e->file_mmio32read.dentry);