From 3480001a799fe072b264bac58cca4d176b05ce3a Mon Sep 17 00:00:00 2001
From: inmarket <andrewh@inmarket.com.au>
Date: Mon, 30 Sep 2013 13:33:35 +1000
Subject: [PATCH] More orientation fixes for SSD1289. Orientation is now
 supported purely in RAM addressing direction which means the orientation of
 the display can be changed without affecting existing information on the
 display. Drawing then occurs in the new orientation.

---
 drivers/gdisp/SSD1289/gdisp_lld.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/gdisp/SSD1289/gdisp_lld.c b/drivers/gdisp/SSD1289/gdisp_lld.c
index 2fe5a1e4..68cdf675 100644
--- a/drivers/gdisp/SSD1289/gdisp_lld.c
+++ b/drivers/gdisp/SSD1289/gdisp_lld.c
@@ -76,9 +76,9 @@ static void set_viewport(GDISPDriver* g) {
 			write_reg(0x004f, (GDISP_SCREEN_HEIGHT-1-g->p.x) & 0x01FF);
 			break;
 		case GDISP_ROTATE_180:
-			write_reg(0x44, (((GDISP_SCREEN_WIDTH-g->p.x-1) & 0x00FF) << 8) | ((GDISP_SCREEN_WIDTH - (g->p.x+g->p.cx)) & 0x00FF));
+			write_reg(0x44, (((GDISP_SCREEN_WIDTH-1-g->p.x) & 0x00FF) << 8) | ((GDISP_SCREEN_WIDTH - (g->p.x+g->p.cx)) & 0x00FF));
 			write_reg(0x45, (GDISP_SCREEN_HEIGHT-(g->p.y+g->p.cy)) & 0x01FF);
-			write_reg(0x46, (GDISP_SCREEN_HEIGHT-g->p.y-1) & 0x01FF);
+			write_reg(0x46, (GDISP_SCREEN_HEIGHT-1-g->p.y) & 0x01FF);
 			write_reg(0x004e, (GDISP_SCREEN_WIDTH-1-g->p.x) & 0x00FF);
 			write_reg(0x004f, (GDISP_SCREEN_HEIGHT-1-g->p.y) & 0x01FF);
 			break;
@@ -278,7 +278,6 @@ LLDSPEC bool_t gdisp_lld_init(GDISPDriver *g) {
 			switch((orientation_t)g->p.ptr) {
 			case GDISP_ROTATE_0:
 				acquire_bus();
-				write_reg(0x0001, 0x2B3F);
 				/* ID = 11 AM = 0 */
 				write_reg(0x0011, 0x6070);
 				release_bus();
@@ -287,17 +286,15 @@ LLDSPEC bool_t gdisp_lld_init(GDISPDriver *g) {
 				break;
 			case GDISP_ROTATE_90:
 				acquire_bus();
-				write_reg(0x0001, 0x293F);
 				/* ID = 01 AM = 1 */
-				write_reg(0x0011, 0x6048);
+				write_reg(0x0011, 0x6058);
 				release_bus();
 				g->g.Height = GDISP_SCREEN_WIDTH;
 				g->g.Width = GDISP_SCREEN_HEIGHT;
 				break;
 			case GDISP_ROTATE_180:
 				acquire_bus();
-				write_reg(0x0001, 0x2B3F);
-				/* ID = 01 AM = 0 */
+				/* ID = 00 AM = 0 */
 				write_reg(0x0011, 0x6040);
 				release_bus();
 				g->g.Height = GDISP_SCREEN_HEIGHT;
@@ -305,9 +302,8 @@ LLDSPEC bool_t gdisp_lld_init(GDISPDriver *g) {
 				break;
 			case GDISP_ROTATE_270:
 				acquire_bus();
-				write_reg(0x0001, 0x293F);
-				/* ID = 11 AM = 1 */
-				write_reg(0x0011, 0x6078);
+				/* ID = 10 AM = 1 */
+				write_reg(0x0011, 0x6068);
 				release_bus();
 				g->g.Height = GDISP_SCREEN_WIDTH;
 				g->g.Width = GDISP_SCREEN_HEIGHT;