cx88: Copy board information into card state

From: Trent Piepho <xyzzy@speakeasy.org>

The cx88 driver state stored the ID of the board type in core->board.  Every
time the driver need to get some information about the board configuration, it
uses the board number as an index into board configuration array.

This patch changes it so that the board number is in core->boardnr, and
core->board is a copy of the board configuration information.  This allows
access to board information without the extra indirection.  e.g.
cx88_boards[core->board].mpeg becomes core->board.mpeg.

This has a number of advantages:
- The code is simpler to write.

- It compiles to be smaller and faster, without needing the extra array lookup
  to get at the board information.

- The cx88_boards array no longer needs to be exported to all cx88 modules.

- The boards array can be made const

- It should be possible to avoid keeping the (large) cx88_boards array around
  after the module is loaded.

- If module parameters or eeprom info override some board configuration
  setting, it's not necessary to modify the boards array, which would
  affect all boards of the same type.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>

1 files changed, 20 insertions, 25 deletions

diff --git a/linux/drivers/media/video/cx88/cx88-core.c b/linux/drivers/media/video/cx88/cx88-core.c
index a1952fc00..76ff9dfdf 100644
--- a/linux/drivers/media/video/cx88/cx88-core.c
+++ b/linux/drivers/media/video/cx88/cx88-core.c
@@ -778,7 +778,7 @@ int cx88_set_scale(struct cx88_core *core, unsigned int width, unsigned int heig
 		value |= (1 << 15);
 		value |= (1 << 16);
 	}
-	if (INPUT(core->input)->type == CX88_VMUX_SVIDEO)
+	if (INPUT(core->input).type == CX88_VMUX_SVIDEO)
 		value |= (1 << 13) | (1 << 5);
 	if (V4L2_FIELD_INTERLACED == field)
 		value |= (1 << 3); // VINT (interlaced vertical scaling)
@@ -873,7 +873,7 @@ static int set_tvaudio(struct cx88_core *core)
 {
 	v4l2_std_id norm = core->tvnorm;
 
-	if (CX88_VMUX_TELEVISION != INPUT(core->input)->type)
+	if (CX88_VMUX_TELEVISION != INPUT(core->input).type)
 		return 0;
 
 	if (V4L2_STD_PAL_BG & norm) {
@@ -1113,7 +1113,7 @@ struct video_device *cx88_vdev_init(struct cx88_core *core,
 	vfd->release = video_device_release;
 #endif
 	snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)",
-		 core->name, type, cx88_boards[core->board].name);
+		 core->name, type, core->board.name);
 	return vfd;
 }
 
@@ -1176,39 +1176,34 @@ struct cx88_core* cx88_core_get(struct pci_dev *pci)
 	core->bmmio = (u8 __iomem *)core->lmmio;
 
 	/* board config */
-	core->board = UNSET;
+	core->boardnr = UNSET;
 	if (card[core->nr] < cx88_bcount)
-		core->board = card[core->nr];
-	for (i = 0; UNSET == core->board  &&  i < cx88_idcount; i++)
+		core->boardnr = card[core->nr];
+	for (i = 0; UNSET == core->boardnr  &&  i < cx88_idcount; i++)
 		if (pci->subsystem_vendor == cx88_subids[i].subvendor &&
 		    pci->subsystem_device == cx88_subids[i].subdevice)
-			core->board = cx88_subids[i].card;
-	if (UNSET == core->board) {
-		core->board = CX88_BOARD_UNKNOWN;
+			core->boardnr = cx88_subids[i].card;
+	if (UNSET == core->boardnr) {
+		core->boardnr = CX88_BOARD_UNKNOWN;
 		cx88_card_list(core,pci);
 	}
+
+	memcpy(&core->board, &cx88_boards[core->boardnr], sizeof(core->board));
+
 	printk(KERN_INFO "CORE %s: subsystem: %04x:%04x, board: %s [card=%d,%s]\n",
 		core->name,pci->subsystem_vendor,
-		pci->subsystem_device,cx88_boards[core->board].name,
-		core->board, card[core->nr] == core->board ?
+		pci->subsystem_device, core->board.name,
+		core->boardnr, card[core->nr] == core->boardnr ?
 		"insmod option" : "autodetected");
 
-	core->tuner_type = tuner[core->nr];
-	core->radio_type = radio[core->nr];
-	if (UNSET == core->tuner_type)
-		core->tuner_type = cx88_boards[core->board].tuner_type;
-	if (UNSET == core->radio_type)
-		core->radio_type = cx88_boards[core->board].radio_type;
-	if (!core->tuner_addr)
-		core->tuner_addr = cx88_boards[core->board].tuner_addr;
-	if (!core->radio_addr)
-		core->radio_addr = cx88_boards[core->board].radio_addr;
+	if (tuner[core->nr] != UNSET)
+		core->board.tuner_type = tuner[core->nr];
+	if (radio[core->nr] != UNSET)
+		core->board.radio_type = radio[core->nr];
 
 	printk(KERN_INFO "TV tuner %d at 0x%02x, Radio tuner %d at 0x%02x\n",
-		core->tuner_type, core->tuner_addr<<1,
-		core->radio_type, core->radio_addr<<1);
-
-	core->tda9887_conf = cx88_boards[core->board].tda9887_conf;
+		core->board.tuner_type, core->board.tuner_addr<<1,
+		core->board.radio_type, core->board.radio_addr<<1);
 
 	/* init hardware */
 	cx88_reset(core);