tgafb: TURBOchannel support

This is support for the TC variations of the TGA boards (properly known as
SFB+ or Smart Frame Buffer Plus boards).  The 8-plane SFB+ board uses the
Bt459 RAMDAC (unlike its PCI TGA counterpart, which uses the Bt485), so
bits have been added to support this chip as well.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: James Simmons <jsimmons@infradead.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 44 insertions, 3 deletions

diff --git a/include/video/tgafb.h b/include/video/tgafb.h
index be2b3e94e251..03d0dbe293a8 100644
--- a/include/video/tgafb.h
+++ b/include/video/tgafb.h
@@ -39,6 +39,7 @@
 #define TGA_RASTEROP_REG                0x0034
 #define TGA_PIXELSHIFT_REG              0x0038
 #define TGA_DEEP_REG                    0x0050
+#define TGA_START_REG                   0x0054
 #define TGA_PIXELMASK_REG               0x005c
 #define TGA_CURSOR_BASE_REG             0x0060
 #define TGA_HORIZ_REG                   0x0064
@@ -140,7 +141,7 @@
 
 
 /*
- * Useful defines for managing the BT463 on the 24-plane TGAs
+ * Useful defines for managing the BT463 on the 24-plane TGAs/SFB+s
  */
 
 #define BT463_ADDR_LO           0x0
@@ -168,12 +169,35 @@
 #define BT463_WINDOW_TYPE_BASE  0x0300
 
 /*
+ * Useful defines for managing the BT459 on the 8-plane SFB+s
+ */
+
+#define BT459_ADDR_LO           0x0
+#define BT459_ADDR_HI           0x1
+#define BT459_REG_ACC           0x2
+#define BT459_PALETTE           0x3
+
+#define BT459_CUR_CLR_1         0x0181
+#define BT459_CUR_CLR_2         0x0182
+#define BT459_CUR_CLR_3         0x0183
+
+#define BT459_CMD_REG_0         0x0201
+#define BT459_CMD_REG_1         0x0202
+#define BT459_CMD_REG_2         0x0203
+
+#define BT459_READ_MASK         0x0204
+
+#define BT459_BLINK_MASK        0x0206
+
+#define BT459_CUR_CMD_REG       0x0300
+
+/*
  * The framebuffer driver private data.
  */
 
 struct tga_par {
-        /* PCI device.  */
-        struct pci_dev *pdev;
+        /* PCI/TC device.  */
+        struct device *dev;
 
         /* Device dependent information.  */
         void __iomem *tga_mem_base;
@@ -235,4 +259,21 @@ BT463_WRITE(struct tga_par *par, u32 m, u16 a, u8 v)
         TGA_WRITE_REG(par, m << 10 | v, TGA_RAMDAC_REG);
 }
 
+static inline void
+BT459_LOAD_ADDR(struct tga_par *par, u16 a)
+{
+        TGA_WRITE_REG(par, BT459_ADDR_LO << 2, TGA_RAMDAC_SETUP_REG);
+        TGA_WRITE_REG(par, a & 0xff, TGA_RAMDAC_REG);
+        TGA_WRITE_REG(par, BT459_ADDR_HI << 2, TGA_RAMDAC_SETUP_REG);
+        TGA_WRITE_REG(par, a >> 8, TGA_RAMDAC_REG);
+}
+
+static inline void
+BT459_WRITE(struct tga_par *par, u32 m, u16 a, u8 v)
+{
+        BT459_LOAD_ADDR(par, a);
+        TGA_WRITE_REG(par, m << 2, TGA_RAMDAC_SETUP_REG);
+        TGA_WRITE_REG(par, v, TGA_RAMDAC_REG);
+}
+
 #endif /* TGAFB_H */