Work on Glamo-core for DRM

This adds modifications to the core of the Glamo driver to expose functionality
to support DRM and KMS.

Signed-off-by: Thomas White <taw@bitwiz.org.uk>

4 files changed, 69 insertions, 21 deletions

diff --git a/drivers/mfd/glamo/glamo-core.c b/drivers/mfd/glamo/glamo-core.c
index 82a906a3cdc..74da66885d1 100644
--- a/drivers/mfd/glamo/glamo-core.c
+++ b/drivers/mfd/glamo/glamo-core.c
@@ -221,10 +221,25 @@ static struct resource glamo_fb_resources[] = {
 		.flags	= IORESOURCE_MEM,
 	}, {
 		.name	= "glamo-fb-mem",
-		.start	= GLAMO_OFFSET_FB,
-		.end	= GLAMO_OFFSET_FB + GLAMO_FB_SIZE - 1,
+		.start	= GLAMO_MEM_BASE + GLAMO_OFFSET_FB,
+		.end	= GLAMO_MEM_BASE + GLAMO_OFFSET_FB + GLAMO_FB_SIZE - 1,
 		.flags	= IORESOURCE_MEM,
-	},
+	}, {
+		.name	= "glamo-cmdq-regs",
+		.start  = GLAMO_REGOFS_CMDQUEUE,
+		.end    = GLAMO_REGOFS_RISC - 1,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.name	= "glamo-2d-regs",
+		.start  = GLAMO_REGOFS_2D,
+		.end    = GLAMO_REGOFS_3D- 1,
+		.flags  = IORESOURCE_MEM,
+	}, {
+		.name	= "glamo-2d-irq",
+		.start	= GLAMO_IRQ_2D,
+		.end	= GLAMO_IRQ_2D,
+		.flags	= IORESOURCE_IRQ,
+	}
 };
 
 static struct resource glamo_mmc_resources[] = {
@@ -235,9 +250,9 @@ static struct resource glamo_mmc_resources[] = {
 		.flags	= IORESOURCE_MEM
 	}, {
 		.name	= "glamo-mmc-mem",
-		.start	= GLAMO_OFFSET_FB + GLAMO_FB_SIZE,
-		.end	= GLAMO_OFFSET_FB + GLAMO_FB_SIZE +
-				  GLAMO_MMC_BUFFER_SIZE - 1,
+		.start	= GLAMO_MEM_BASE + GLAMO_OFFSET_MMC,
+		.end	= GLAMO_MEM_BASE + GLAMO_OFFSET_MMC
+		                         + GLAMO_MMC_BUFFER_SIZE - 1,
 		.flags	= IORESOURCE_MEM
 	}, {
 		.start	= GLAMO_IRQ_MMC,
diff --git a/drivers/mfd/glamo/glamo-core.h b/drivers/mfd/glamo/glamo-core.h
index 17017b03fb5..0adba965b25 100644
--- a/drivers/mfd/glamo/glamo-core.h
+++ b/drivers/mfd/glamo/glamo-core.h
@@ -3,18 +3,30 @@
 
 #include <linux/mfd/glamo.h>
 
+/* Amount of Glamo memory */
+#define GLAMO_INTERNAL_RAM_SIZE 0x800000
+
+/* Arbitrarily determined amount for the hardware cursor */
+#define GLAMO_CURSOR_SIZE (4096)
+#define GLAMO_MMC_BUFFER_SIZE (64 * 1024) /* 64k MMC buffer */
+/* Remaining memory will be used for 2D and 3D graphics */
+#define GLAMO_FB_SIZE (GLAMO_INTERNAL_RAM_SIZE     \
+			 - GLAMO_CURSOR_SIZE       \
+			 - GLAMO_MMC_BUFFER_SIZE)
+/* A 640x480, 16bpp, double-buffered framebuffer */
+#if (GLAMO_FB_SIZE < (640 * 480 * 4))	/* == 0x12c000 */
+#error Not enough Glamo VRAM for framebuffer!
+#endif
+
 /* for the time being, we put the on-screen framebuffer into the lowest
  * VRAM space.  This should make the code easily compatible with the various
- * 2MB/4MB/8MB variants of the Smedia chips */
-#define GLAMO_OFFSET_VRAM	0x800000
-#define GLAMO_OFFSET_FB	(GLAMO_OFFSET_VRAM)
-
-/* we only allocate the minimum possible size for the framebuffer to make
- * sure we have sufficient memory for other functions of the chip */
-/*#define GLAMO_FB_SIZE	(640*480*4)	*//* == 0x12c000 */
-#define GLAMO_INTERNAL_RAM_SIZE 0x800000
-#define GLAMO_MMC_BUFFER_SIZE (64 * 1024)
-#define GLAMO_FB_SIZE	(GLAMO_INTERNAL_RAM_SIZE - GLAMO_MMC_BUFFER_SIZE)
+ * 2MB/4MB/8MB variants of the Smedia chips
+ * glamo-fb.c assumes FB comes first, followed by cursor, so DON'T MOVE THEM
+ * (see glamo_regs[] in glamo-fb.c for more information) */
+#define GLAMO_MEM_BASE 		(0x800000)
+#define GLAMO_OFFSET_FB		(0x000000)
+#define GLAMO_OFFSET_CURSOR	(GLAMO_OFFSET_FB + GLAMO_FB_SIZE)
+#define GLAMO_OFFSET_MMC	(GLAMO_OFFSET_CURSOR + GLAMO_CURSOR_SIZE)
 
 enum glamo_pll {
     GLAMO_PLL1,
diff --git a/drivers/mfd/glamo/glamo-regs.h b/drivers/mfd/glamo/glamo-regs.h
index 59848e1122e..8b2fd474fcd 100644
--- a/drivers/mfd/glamo/glamo-regs.h
+++ b/drivers/mfd/glamo/glamo-regs.h
@@ -627,4 +627,28 @@ enum glamo_core_revisions {
 	GLAMO_CORE_REV_A3		= 0x0003,
 };
 
+enum glamo_register_cq {
+	GLAMO_REG_CMDQ_BASE_ADDRL     = 0x00,
+	GLAMO_REG_CMDQ_BASE_ADDRH     = 0x02,
+	GLAMO_REG_CMDQ_LEN            = 0x04,
+	GLAMO_REG_CMDQ_WRITE_ADDRL    = 0x06,
+	GLAMO_REG_CMDQ_WRITE_ADDRH    = 0x08,
+	GLAMO_REG_CMDQ_FLIP           = 0x0a,
+	GLAMO_REG_CMDQ_CONTROL        = 0x0c,
+	GLAMO_REG_CMDQ_READ_ADDRL     = 0x0e,
+	GLAMO_REG_CMDQ_READ_ADDRH     = 0x10,
+	GLAMO_REG_CMDQ_STATUS         = 0x12,
+};
+
+#define REG_2D(x)		(GLAMO_REGOFS_2D+(x))
+
+enum glamo_register_2d {
+	GLAMO_REG_2D_DST_X		= REG_2D(0x0a),
+	GLAMO_REG_2D_COMMAND1           = REG_2D(0x3a),
+	GLAMO_REG_2D_STATUS		= REG_2D(0x42),
+	GLAMO_REG_2D_ID1		= REG_2D(0x44),
+	GLAMO_REG_2D_ID2		= REG_2D(0x46),
+	GLAMO_REG_2D_ID3		= REG_2D(0x48),
+};
+
 #endif /* _GLAMO_REGS_H */
diff --git a/include/linux/mfd/glamo.h b/include/linux/mfd/glamo.h
index 529d4f07f03..ea91a067e8c 100644
--- a/include/linux/mfd/glamo.h
+++ b/include/linux/mfd/glamo.h
@@ -41,12 +41,9 @@ enum glamo_engine {
 	GLAMO_ENGINE_RISC = 11,
 	GLAMO_ENGINE_MICROP1_MPEG_ENC = 12,
 	GLAMO_ENGINE_MICROP1_MPEG_DEC = 13,
-#if 0
-	GLAMO_ENGINE_H264_DEC = 14,
-	GLAMO_ENGINE_RISC1 = 15,
-	GLAMO_ENGINE_SPI = 16,
-#endif
 	__NUM_GLAMO_ENGINES
 };
 
+#define GLAMO_ENGINE_ALL (__NUM_GLAMO_ENGINES)
+
 #endif