firewire: Reduce some redundant register definitions.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 22 insertions, 28 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index ec47ae9a2dd1..02b2b69c8741 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -55,6 +55,11 @@ struct descriptor {
         __le16 transfer_status;
 } __attribute__((aligned(16)));
 
+#define control_set(regs)       (regs)
+#define control_clear(regs)     ((regs) + 4)
+#define command_ptr(regs)       ((regs) + 12)
+#define context_match(regs)     ((regs) + 16)
+
 struct ar_buffer {
         struct descriptor descriptor;
         struct ar_buffer *next;
@@ -66,9 +71,7 @@ struct ar_context {
         struct ar_buffer *current_buffer;
         struct ar_buffer *last_buffer;
         void *pointer;
-        u32 command_ptr;
-        u32 control_set;
-        u32 control_clear;
+        u32 regs;
         struct tasklet_struct tasklet;
 };
 
@@ -85,9 +88,7 @@ struct at_context {
                 struct descriptor last;
         } d;
 
-        u32 command_ptr;
-        u32 control_set;
-        u32 control_clear;
+        u32 regs;
 
         struct tasklet_struct tasklet;
 };
@@ -102,10 +103,7 @@ struct at_context {
 struct iso_context {
         struct fw_iso_context base;
         struct tasklet_struct tasklet;
-        u32 control_set;
-        u32 control_clear;
-        u32 command_ptr;
-        u32 context_match;
+        u32 regs;
 
         struct descriptor *buffer;
         dma_addr_t buffer_bus;
@@ -248,7 +246,7 @@ static int ar_context_add_page(struct ar_context *ctx)
         ctx->last_buffer->next = ab;
         ctx->last_buffer = ab;
 
-        reg_write(ctx->ohci, ctx->control_set, CONTEXT_WAKE);
+        reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_WAKE);
         flush_writes(ctx->ohci);
 
         return 0;
@@ -375,15 +373,13 @@ static void ar_context_tasklet(unsigned long data)
 }
 
 static int
-ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 control_set)
+ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs)
 {
         struct ar_buffer ab;
 
-        ctx->control_set   = control_set;
-        ctx->control_clear = control_set + 4;
-        ctx->command_ptr   = control_set + 12;
-        ctx->ohci          = ohci;
-        ctx->last_buffer   = &ab;
+        ctx->regs        = regs;
+        ctx->ohci        = ohci;
+        ctx->last_buffer = &ab;
         tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
 
         ar_context_add_page(ctx);
@@ -391,8 +387,8 @@ ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 control_set)
         ctx->current_buffer = ab.next;
         ctx->pointer = ctx->current_buffer->data;
 
-        reg_write(ctx->ohci, ctx->command_ptr, ab.descriptor.branch_address);
-        reg_write(ctx->ohci, ctx->control_set, CONTEXT_RUN);
+        reg_write(ctx->ohci, command_ptr(ctx->regs), ab.descriptor.branch_address);
+        reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_RUN);
         flush_writes(ctx->ohci);
 
         return 0;
@@ -489,9 +485,9 @@ at_context_setup_packet(struct at_context *ctx, struct list_head *list)
 
         /* FIXME: Document how the locking works. */
         if (ohci->generation == packet->generation) {
-                reg_write(ctx->ohci, ctx->command_ptr,
+                reg_write(ctx->ohci, command_ptr(ctx->regs),
                           ctx->descriptor_bus | z);
-                reg_write(ctx->ohci, ctx->control_set,
+                reg_write(ctx->ohci, control_set(ctx->regs),
                           CONTEXT_RUN | CONTEXT_WAKE);
         } else {
                 /* We dont return error codes from this function; all
@@ -505,9 +501,9 @@ static void at_context_stop(struct at_context *ctx)
 {
         u32 reg;
 
-        reg_write(ctx->ohci, ctx->control_clear, CONTEXT_RUN);
+        reg_write(ctx->ohci, control_clear(ctx->regs), CONTEXT_RUN);
 
-        reg = reg_read(ctx->ohci, ctx->control_set);
+        reg = reg_read(ctx->ohci, control_set(ctx->regs));
         if (reg & CONTEXT_ACTIVE)
                 fw_notify("Tried to stop context, but it is still active "
                           "(0x%08x).\n", reg);
@@ -578,7 +574,7 @@ static void at_context_tasklet(unsigned long data)
 }
 
 static int
-at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 control_set)
+at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 regs)
 {
         INIT_LIST_HEAD(&ctx->list);
 
@@ -588,10 +584,8 @@ at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 control_set)
         if (ctx->descriptor_bus == 0)
                 return -ENOMEM;
 
-        ctx->control_set   = control_set;
-        ctx->control_clear = control_set + 4;
-        ctx->command_ptr   = control_set + 12;
-        ctx->ohci          = ohci;
+        ctx->regs = regs;
+        ctx->ohci = ohci;
 
         tasklet_init(&ctx->tasklet, at_context_tasklet, (unsigned long)ctx);