*/
#define HAS_DMA
+static DEFINE_SPINLOCK(dma_spin_lock);
+
+#define claim_dma_lock() \
+({ unsigned long flags; \
+ spin_lock_irqsave(&dma_spin_lock, flags); \
+ flags; \
+})
+
+#define release_dma_lock(__flags) \
+ spin_unlock_irqrestore(&dma_spin_lock, __flags);
+
static struct sparc_ebus_info {
struct ebus_dma_info info;
unsigned int addr;
unsigned int count;
+ int lock;
} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
+static __inline__ int request_dma(unsigned int dmanr, const char *device_id)
+{
+ if (dmanr >= PARPORT_PC_MAX_PORTS)
+ return -EINVAL;
+ if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
+ return -EBUSY;
+ return 0;
+}
+
+static __inline__ void free_dma(unsigned int dmanr)
+{
+ if (dmanr >= PARPORT_PC_MAX_PORTS) {
+ printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
+ return;
+ }
+ if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
+ printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
+ return;
+ }
+}
+
static __inline__ void enable_dma(unsigned int dmanr)
{
ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
if (!strcmp(edev->prom_node->name, "ecpp"))
return 1;
if (!strcmp(edev->prom_node->name, "parallel")) {
- char *compat;
+ const char *compat;
compat = of_get_property(edev->prom_node,
"compatible", NULL);