[PATCH] Fbdev driver for IBM GXT4500P videocards
This is an fbdev driver for the IBM GXT4500P display card found in some IBM System P (pSeries) machines. These cards have hardware 2D and 3D capabilities, but the driver does not use them; it just exports a dumb framebuffer. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
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commit
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@ -1615,6 +1615,16 @@ config FB_PNX4008_DUM_RGB
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---help---
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Say Y here to enable support for PNX4008 RGB Framebuffer
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config FB_IBM_GXT4500
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tristate "Framebuffer support for IBM GXT4500P adaptor"
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depends on PPC
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select FB_CFB_FILLRECT
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select FB_CFB_COPYAREA
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select FB_CFB_IMAGEBLIT
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---help---
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Say Y here to enable support for the IBM GXT4500P display
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adaptor, found on some IBM System P (pSeries) machines.
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config FB_VIRTUAL
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tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)"
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depends on FB
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@ -99,6 +99,7 @@ obj-$(CONFIG_FB_IMX) += imxfb.o
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obj-$(CONFIG_FB_S3C2410) += s3c2410fb.o
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obj-$(CONFIG_FB_PNX4008_DUM) += pnx4008/
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obj-$(CONFIG_FB_PNX4008_DUM_RGB) += pnx4008/
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obj-$(CONFIG_FB_IBM_GXT4500) += gxt4500.o
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# Platform or fallback drivers go here
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obj-$(CONFIG_FB_VESA) += vesafb.o
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741
drivers/video/gxt4500.c
Normal file
741
drivers/video/gxt4500.c
Normal file
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@ -0,0 +1,741 @@
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/*
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* Frame buffer device for IBM GXT4500P display adaptor
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*
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* Copyright (C) 2006 Paul Mackerras, IBM Corp. <paulus@samba.org>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fb.h>
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#include <linux/console.h>
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#include <linux/pci.h>
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#include <linux/pci_ids.h>
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#include <linux/delay.h>
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#define PCI_DEVICE_ID_IBM_GXT4500P 0x21c
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/* GXT4500P registers */
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/* Registers in PCI config space */
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#define CFG_ENDIAN0 0x40
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/* Misc control/status registers */
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#define STATUS 0x1000
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#define CTRL_REG0 0x1004
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#define CR0_HALT_DMA 0x4
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#define CR0_RASTER_RESET 0x8
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#define CR0_GEOM_RESET 0x10
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#define CR0_MEM_CTRLER_RESET 0x20
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/* Framebuffer control registers */
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#define FB_AB_CTRL 0x1100
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#define FB_CD_CTRL 0x1104
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#define FB_WID_CTRL 0x1108
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#define FB_Z_CTRL 0x110c
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#define FB_VGA_CTRL 0x1110
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#define REFRESH_AB_CTRL 0x1114
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#define REFRESH_CD_CTRL 0x1118
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#define FB_OVL_CTRL 0x111c
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#define FB_CTRL_TYPE 0x80000000
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#define FB_CTRL_WIDTH_MASK 0x007f0000
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#define FB_CTRL_WIDTH_SHIFT 16
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#define FB_CTRL_START_SEG_MASK 0x00003fff
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#define REFRESH_START 0x1098
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#define REFRESH_SIZE 0x109c
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/* "Direct" framebuffer access registers */
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#define DFA_FB_A 0x11e0
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#define DFA_FB_B 0x11e4
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#define DFA_FB_C 0x11e8
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#define DFA_FB_D 0x11ec
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#define DFA_FB_ENABLE 0x80000000
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#define DFA_FB_BASE_MASK 0x03f00000
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#define DFA_FB_STRIDE_1k 0x00000000
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#define DFA_FB_STRIDE_2k 0x00000010
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#define DFA_FB_STRIDE_4k 0x00000020
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#define DFA_PIX_8BIT 0x00000000
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#define DFA_PIX_16BIT_565 0x00000001
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#define DFA_PIX_16BIT_1555 0x00000002
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#define DFA_PIX_24BIT 0x00000004
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#define DFA_PIX_32BIT 0x00000005
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/* maps DFA_PIX_* to pixel size in bytes */
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static const unsigned char pixsize[] = {
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1, 2, 2, 2, 4, 4
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};
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/* Display timing generator registers */
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#define DTG_CONTROL 0x1900
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#define DTG_CTL_SCREEN_REFRESH 2
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#define DTG_CTL_ENABLE 1
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#define DTG_HORIZ_EXTENT 0x1904
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#define DTG_HORIZ_DISPLAY 0x1908
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#define DTG_HSYNC_START 0x190c
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#define DTG_HSYNC_END 0x1910
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#define DTG_HSYNC_END_COMP 0x1914
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#define DTG_VERT_EXTENT 0x1918
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#define DTG_VERT_DISPLAY 0x191c
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#define DTG_VSYNC_START 0x1920
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#define DTG_VSYNC_END 0x1924
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#define DTG_VERT_SHORT 0x1928
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/* PLL/RAMDAC registers */
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#define DISP_CTL 0x402c
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#define DISP_CTL_OFF 2
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#define SYNC_CTL 0x4034
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#define SYNC_CTL_SYNC_ON_RGB 1
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#define SYNC_CTL_SYNC_OFF 2
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#define SYNC_CTL_HSYNC_INV 8
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#define SYNC_CTL_VSYNC_INV 0x10
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#define SYNC_CTL_HSYNC_OFF 0x20
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#define SYNC_CTL_VSYNC_OFF 0x40
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#define PLL_M 0x4040
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#define PLL_N 0x4044
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#define PLL_POSTDIV 0x4048
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/* Hardware cursor */
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#define CURSOR_X 0x4078
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#define CURSOR_Y 0x407c
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#define CURSOR_HOTSPOT 0x4080
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#define CURSOR_MODE 0x4084
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#define CURSOR_MODE_OFF 0
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#define CURSOR_MODE_4BPP 1
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#define CURSOR_PIXMAP 0x5000
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#define CURSOR_CMAP 0x7400
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/* Window attribute table */
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#define WAT_FMT 0x4100
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#define WAT_FMT_24BIT 0
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#define WAT_FMT_16BIT_565 1
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#define WAT_FMT_16BIT_1555 2
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#define WAT_FMT_32BIT 3 /* 0 vs. 3 is a guess */
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#define WAT_FMT_8BIT_332 9
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#define WAT_FMT_8BIT 0xa
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#define WAT_FMT_NO_CMAP 4 /* ORd in to other values */
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#define WAT_CMAP_OFFSET 0x4104 /* 4-bit value gets << 6 */
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#define WAT_CTRL 0x4108
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#define WAT_CTRL_SEL_B 1 /* select B buffer if 1 */
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#define WAT_CTRL_NO_INC 2
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#define WAT_GAMMA_CTRL 0x410c
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#define WAT_GAMMA_DISABLE 1 /* disables gamma cmap */
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#define WAT_OVL_CTRL 0x430c /* controls overlay */
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/* Indexed by DFA_PIX_* values */
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static const unsigned char watfmt[] = {
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WAT_FMT_8BIT, WAT_FMT_16BIT_565, WAT_FMT_16BIT_1555, 0,
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WAT_FMT_24BIT, WAT_FMT_32BIT
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};
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/* Colormap array; 1k entries of 4 bytes each */
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#define CMAP 0x6000
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#define readreg(par, reg) readl((par)->regs + (reg))
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#define writereg(par, reg, val) writel((val), (par)->regs + (reg))
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struct gxt4500_par {
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void __iomem *regs;
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int pixfmt; /* pixel format, see DFA_PIX_* values */
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/* PLL parameters */
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int pll_m; /* ref clock divisor */
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int pll_n; /* VCO divisor */
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int pll_pd1; /* first post-divisor */
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int pll_pd2; /* second post-divisor */
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u32 pseudo_palette[16]; /* used in color blits */
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};
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/* mode requested by user */
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static char *mode_option;
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/* default mode: 1280x1024 @ 60 Hz, 8 bpp */
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static const struct fb_videomode defaultmode __devinitdata = {
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.refresh = 60,
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.xres = 1280,
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.yres = 1024,
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.pixclock = 9295,
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.left_margin = 248,
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.right_margin = 48,
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.upper_margin = 38,
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.lower_margin = 1,
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.hsync_len = 112,
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.vsync_len = 3,
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.vmode = FB_VMODE_NONINTERLACED
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};
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/*
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* The refclk and VCO dividers appear to use a linear feedback shift
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* register, which gets reloaded when it reaches a terminal value, at
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* which point the divider output is toggled. Thus one can obtain
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* whatever divisor is required by putting the appropriate value into
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* the reload register. For a divisor of N, one puts the value from
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* the LFSR sequence that comes N-1 places before the terminal value
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* into the reload register.
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*/
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static const unsigned char mdivtab[] = {
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/* 1 */ 0x3f, 0x00, 0x20, 0x10, 0x28, 0x14, 0x2a, 0x15, 0x0a,
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/* 10 */ 0x25, 0x32, 0x19, 0x0c, 0x26, 0x13, 0x09, 0x04, 0x22, 0x11,
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/* 20 */ 0x08, 0x24, 0x12, 0x29, 0x34, 0x1a, 0x2d, 0x36, 0x1b, 0x0d,
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/* 30 */ 0x06, 0x23, 0x31, 0x38, 0x1c, 0x2e, 0x17, 0x0b, 0x05, 0x02,
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/* 40 */ 0x21, 0x30, 0x18, 0x2c, 0x16, 0x2b, 0x35, 0x3a, 0x1d, 0x0e,
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/* 50 */ 0x27, 0x33, 0x39, 0x3c, 0x1e, 0x2f, 0x37, 0x3b, 0x3d, 0x3e,
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/* 60 */ 0x1f, 0x0f, 0x07, 0x03, 0x01,
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};
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static const unsigned char ndivtab[] = {
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/* 2 */ 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0x78, 0xbc, 0x5e,
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/* 10 */ 0x2f, 0x17, 0x0b, 0x85, 0xc2, 0xe1, 0x70, 0x38, 0x9c, 0x4e,
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/* 20 */ 0xa7, 0xd3, 0xe9, 0xf4, 0xfa, 0xfd, 0xfe, 0x7f, 0xbf, 0xdf,
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/* 30 */ 0xef, 0x77, 0x3b, 0x1d, 0x8e, 0xc7, 0xe3, 0x71, 0xb8, 0xdc,
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/* 40 */ 0x6e, 0xb7, 0x5b, 0x2d, 0x16, 0x8b, 0xc5, 0xe2, 0xf1, 0xf8,
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/* 50 */ 0xfc, 0x7e, 0x3f, 0x9f, 0xcf, 0x67, 0xb3, 0xd9, 0x6c, 0xb6,
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/* 60 */ 0xdb, 0x6d, 0x36, 0x9b, 0x4d, 0x26, 0x13, 0x89, 0xc4, 0x62,
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/* 70 */ 0xb1, 0xd8, 0xec, 0xf6, 0xfb, 0x7d, 0xbe, 0x5f, 0xaf, 0x57,
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/* 80 */ 0x2b, 0x95, 0x4a, 0x25, 0x92, 0x49, 0xa4, 0x52, 0x29, 0x94,
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/* 90 */ 0xca, 0x65, 0xb2, 0x59, 0x2c, 0x96, 0xcb, 0xe5, 0xf2, 0x79,
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/* 100 */ 0x3c, 0x1e, 0x0f, 0x07, 0x83, 0x41, 0x20, 0x90, 0x48, 0x24,
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/* 110 */ 0x12, 0x09, 0x84, 0x42, 0xa1, 0x50, 0x28, 0x14, 0x8a, 0x45,
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/* 120 */ 0xa2, 0xd1, 0xe8, 0x74, 0xba, 0xdd, 0xee, 0xf7, 0x7b, 0x3d,
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/* 130 */ 0x9e, 0x4f, 0x27, 0x93, 0xc9, 0xe4, 0x72, 0x39, 0x1c, 0x0e,
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/* 140 */ 0x87, 0xc3, 0x61, 0x30, 0x18, 0x8c, 0xc6, 0x63, 0x31, 0x98,
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/* 150 */ 0xcc, 0xe6, 0x73, 0xb9, 0x5c, 0x2e, 0x97, 0x4b, 0xa5, 0xd2,
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/* 160 */ 0x69, 0xb4, 0xda, 0xed, 0x76, 0xbb, 0x5d, 0xae, 0xd7, 0x6b,
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/* 170 */ 0xb5, 0x5a, 0xad, 0x56, 0xab, 0xd5, 0x6a, 0x35, 0x1a, 0x8d,
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/* 180 */ 0x46, 0x23, 0x11, 0x88, 0x44, 0x22, 0x91, 0xc8, 0x64, 0x32,
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/* 190 */ 0x19, 0x0c, 0x86, 0x43, 0x21, 0x10, 0x08, 0x04, 0x02, 0x81,
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/* 200 */ 0x40, 0xa0, 0xd0, 0x68, 0x34, 0x9a, 0xcd, 0x66, 0x33, 0x99,
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/* 210 */ 0x4c, 0xa6, 0x53, 0xa9, 0xd4, 0xea, 0x75, 0x3a, 0x9d, 0xce,
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/* 220 */ 0xe7, 0xf3, 0xf9, 0x7c, 0x3e, 0x1f, 0x8f, 0x47, 0xa3, 0x51,
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/* 230 */ 0xa8, 0x54, 0xaa, 0x55, 0x2a, 0x15, 0x0a, 0x05, 0x82, 0xc1,
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/* 240 */ 0x60, 0xb0, 0x58, 0xac, 0xd6, 0xeb, 0xf5, 0x7a, 0xbd, 0xde,
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/* 250 */ 0x6f, 0x37, 0x1b, 0x0d, 0x06, 0x03, 0x01,
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};
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#define REF_PERIOD_PS 9259 /* period of reference clock in ps */
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static int calc_pll(int period_ps, struct gxt4500_par *par)
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{
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int m, n, pdiv1, pdiv2, postdiv;
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int pll_period, best_error, t;
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/* only deal with range 1MHz - 400MHz */
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if (period_ps < 2500 || period_ps > 1000000)
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return -1;
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best_error = 1000000;
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for (pdiv1 = 1; pdiv1 <= 8; ++pdiv1) {
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for (pdiv2 = 1; pdiv2 <= pdiv1; ++pdiv2) {
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postdiv = pdiv1 * pdiv2;
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pll_period = (period_ps + postdiv - 1) / postdiv;
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/* keep pll in range 500..1250 MHz */
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if (pll_period < 800 || pll_period > 2000)
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continue;
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for (m = 3; m <= 40; ++m) {
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n = REF_PERIOD_PS * m * postdiv / period_ps;
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if (n < 5 || n > 256)
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continue;
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t = REF_PERIOD_PS * m * postdiv / n;
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t -= period_ps;
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if (t >= 0 && t < best_error) {
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par->pll_m = m;
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par->pll_n = n;
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par->pll_pd1 = pdiv1;
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par->pll_pd2 = pdiv2;
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best_error = t;
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}
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}
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}
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}
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if (best_error == 1000000)
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return -1;
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return 0;
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}
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static int calc_pixclock(struct gxt4500_par *par)
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{
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return REF_PERIOD_PS * par->pll_m * par->pll_pd1 * par->pll_pd2
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/ par->pll_n;
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}
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static int gxt4500_var_to_par(struct fb_var_screeninfo *var,
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struct gxt4500_par *par)
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{
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if (var->xres + var->xoffset > var->xres_virtual ||
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var->yres + var->yoffset > var->yres_virtual ||
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var->xres_virtual > 4096)
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return -EINVAL;
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if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
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return -EINVAL;
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if (calc_pll(var->pixclock, par) < 0)
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return -EINVAL;
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switch (var->bits_per_pixel) {
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case 32:
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if (var->transp.length)
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par->pixfmt = DFA_PIX_32BIT;
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else
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par->pixfmt = DFA_PIX_24BIT;
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break;
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case 24:
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par->pixfmt = DFA_PIX_24BIT;
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break;
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case 16:
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if (var->green.length == 5)
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par->pixfmt = DFA_PIX_16BIT_1555;
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else
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par->pixfmt = DFA_PIX_16BIT_565;
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break;
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case 8:
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par->pixfmt = DFA_PIX_8BIT;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct fb_bitfield eightbits = {0, 8};
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static const struct fb_bitfield nobits = {0, 0};
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static void gxt4500_unpack_pixfmt(struct fb_var_screeninfo *var,
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int pixfmt)
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{
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var->bits_per_pixel = pixsize[pixfmt] * 8;
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var->red = eightbits;
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var->green = eightbits;
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var->blue = eightbits;
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var->transp = nobits;
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switch (pixfmt) {
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case DFA_PIX_16BIT_565:
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var->red.length = 5;
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var->green.length = 6;
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var->blue.length = 5;
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break;
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case DFA_PIX_16BIT_1555:
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var->red.length = 5;
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var->green.length = 5;
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var->blue.length = 5;
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var->transp.length = 1;
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break;
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case DFA_PIX_32BIT:
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var->transp.length = 8;
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break;
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}
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if (pixfmt != DFA_PIX_8BIT) {
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var->green.offset = var->red.length;
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var->blue.offset = var->green.offset + var->green.length;
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if (var->transp.length)
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var->transp.offset =
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var->blue.offset + var->blue.length;
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}
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}
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static int gxt4500_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct gxt4500_par par;
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int err;
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par = *(struct gxt4500_par *)info->par;
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err = gxt4500_var_to_par(var, &par);
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if (!err) {
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var->pixclock = calc_pixclock(&par);
|
||||
gxt4500_unpack_pixfmt(var, par.pixfmt);
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static int gxt4500_set_par(struct fb_info *info)
|
||||
{
|
||||
struct gxt4500_par *par = info->par;
|
||||
struct fb_var_screeninfo *var = &info->var;
|
||||
int err;
|
||||
u32 ctrlreg;
|
||||
unsigned int dfa_ctl, pixfmt, stride;
|
||||
unsigned int wid_tiles, i;
|
||||
unsigned int prefetch_pix, htot;
|
||||
struct gxt4500_par save_par;
|
||||
|
||||
save_par = *par;
|
||||
err = gxt4500_var_to_par(var, par);
|
||||
if (err) {
|
||||
*par = save_par;
|
||||
return err;
|
||||
}
|
||||
|
||||
/* turn off DTG for now */
|
||||
ctrlreg = readreg(par, DTG_CONTROL);
|
||||
ctrlreg &= ~(DTG_CTL_ENABLE | DTG_CTL_SCREEN_REFRESH);
|
||||
writereg(par, DTG_CONTROL, ctrlreg);
|
||||
|
||||
/* set PLL registers */
|
||||
writereg(par, PLL_M, mdivtab[par->pll_m - 1]);
|
||||
writereg(par, PLL_N, ndivtab[par->pll_n - 2]);
|
||||
writereg(par, PLL_POSTDIV,
|
||||
((8 - par->pll_pd1) << 3) | (8 - par->pll_pd2));
|
||||
msleep(20);
|
||||
|
||||
/* turn off hardware cursor */
|
||||
writereg(par, CURSOR_MODE, CURSOR_MODE_OFF);
|
||||
|
||||
/* reset raster engine */
|
||||
writereg(par, CTRL_REG0, CR0_RASTER_RESET | (CR0_RASTER_RESET << 16));
|
||||
udelay(10);
|
||||
writereg(par, CTRL_REG0, CR0_RASTER_RESET << 16);
|
||||
|
||||
/* set display timing generator registers */
|
||||
htot = var->xres + var->left_margin + var->right_margin +
|
||||
var->hsync_len;
|
||||
writereg(par, DTG_HORIZ_EXTENT, htot - 1);
|
||||
writereg(par, DTG_HORIZ_DISPLAY, var->xres - 1);
|
||||
writereg(par, DTG_HSYNC_START, var->xres + var->right_margin - 1);
|
||||
writereg(par, DTG_HSYNC_END,
|
||||
var->xres + var->right_margin + var->hsync_len - 1);
|
||||
writereg(par, DTG_HSYNC_END_COMP,
|
||||
var->xres + var->right_margin + var->hsync_len - 1);
|
||||
writereg(par, DTG_VERT_EXTENT,
|
||||
var->yres + var->upper_margin + var->lower_margin +
|
||||
var->vsync_len - 1);
|
||||
writereg(par, DTG_VERT_DISPLAY, var->yres - 1);
|
||||
writereg(par, DTG_VSYNC_START, var->yres + var->lower_margin - 1);
|
||||
writereg(par, DTG_VSYNC_END,
|
||||
var->yres + var->lower_margin + var->vsync_len - 1);
|
||||
prefetch_pix = 3300000 / var->pixclock;
|
||||
if (prefetch_pix >= htot)
|
||||
prefetch_pix = htot - 1;
|
||||
writereg(par, DTG_VERT_SHORT, htot - prefetch_pix - 1);
|
||||
ctrlreg |= DTG_CTL_ENABLE | DTG_CTL_SCREEN_REFRESH;
|
||||
writereg(par, DTG_CONTROL, ctrlreg);
|
||||
|
||||
/* calculate stride in DFA aperture */
|
||||
if (var->xres_virtual > 2048) {
|
||||
stride = 4096;
|
||||
dfa_ctl = DFA_FB_STRIDE_4k;
|
||||
} else if (var->xres_virtual > 1024) {
|
||||
stride = 2048;
|
||||
dfa_ctl = DFA_FB_STRIDE_2k;
|
||||
} else {
|
||||
stride = 1024;
|
||||
dfa_ctl = DFA_FB_STRIDE_1k;
|
||||
}
|
||||
|
||||
/* Set up framebuffer definition */
|
||||
wid_tiles = (var->xres_virtual + 63) >> 6;
|
||||
|
||||
/* XXX add proper FB allocation here someday */
|
||||
writereg(par, FB_AB_CTRL, FB_CTRL_TYPE | (wid_tiles << 16) | 0);
|
||||
writereg(par, REFRESH_AB_CTRL, FB_CTRL_TYPE | (wid_tiles << 16) | 0);
|
||||
writereg(par, FB_CD_CTRL, FB_CTRL_TYPE | (wid_tiles << 16) | 0);
|
||||
writereg(par, REFRESH_CD_CTRL, FB_CTRL_TYPE | (wid_tiles << 16) | 0);
|
||||
writereg(par, REFRESH_START, (var->xoffset << 16) | var->yoffset);
|
||||
writereg(par, REFRESH_SIZE, (var->xres << 16) | var->yres);
|
||||
|
||||
/* Set up framebuffer access by CPU */
|
||||
|
||||
pixfmt = par->pixfmt;
|
||||
dfa_ctl |= DFA_FB_ENABLE | pixfmt;
|
||||
writereg(par, DFA_FB_A, dfa_ctl);
|
||||
|
||||
/*
|
||||
* Set up window attribute table.
|
||||
* We set all WAT entries the same so it doesn't matter what the
|
||||
* window ID (WID) plane contains.
|
||||
*/
|
||||
for (i = 0; i < 32; ++i) {
|
||||
writereg(par, WAT_FMT + (i << 4), watfmt[pixfmt]);
|
||||
writereg(par, WAT_CMAP_OFFSET + (i << 4), 0);
|
||||
writereg(par, WAT_CTRL + (i << 4), 0);
|
||||
writereg(par, WAT_GAMMA_CTRL + (i << 4), WAT_GAMMA_DISABLE);
|
||||
}
|
||||
|
||||
/* Set sync polarity etc. */
|
||||
ctrlreg = readreg(par, SYNC_CTL) &
|
||||
~(SYNC_CTL_SYNC_ON_RGB | SYNC_CTL_HSYNC_INV |
|
||||
SYNC_CTL_VSYNC_INV);
|
||||
if (var->sync & FB_SYNC_ON_GREEN)
|
||||
ctrlreg |= SYNC_CTL_SYNC_ON_RGB;
|
||||
if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
|
||||
ctrlreg |= SYNC_CTL_HSYNC_INV;
|
||||
if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
|
||||
ctrlreg |= SYNC_CTL_VSYNC_INV;
|
||||
writereg(par, SYNC_CTL, ctrlreg);
|
||||
|
||||
info->fix.line_length = stride * pixsize[pixfmt];
|
||||
info->fix.visual = (pixfmt == DFA_PIX_8BIT)? FB_VISUAL_PSEUDOCOLOR:
|
||||
FB_VISUAL_DIRECTCOLOR;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gxt4500_setcolreg(unsigned int reg, unsigned int red,
|
||||
unsigned int green, unsigned int blue,
|
||||
unsigned int transp, struct fb_info *info)
|
||||
{
|
||||
u32 cmap_entry;
|
||||
struct gxt4500_par *par = info->par;
|
||||
|
||||
if (reg > 1023)
|
||||
return 1;
|
||||
cmap_entry = ((transp & 0xff00) << 16) | ((blue & 0xff00) << 8) |
|
||||
(green & 0xff00) | (red >> 8);
|
||||
writereg(par, CMAP + reg * 4, cmap_entry);
|
||||
|
||||
if (reg < 16 && par->pixfmt != DFA_PIX_8BIT) {
|
||||
u32 *pal = info->pseudo_palette;
|
||||
u32 val = reg;
|
||||
switch (par->pixfmt) {
|
||||
case DFA_PIX_16BIT_565:
|
||||
val |= (reg << 11) | (reg << 6);
|
||||
break;
|
||||
case DFA_PIX_16BIT_1555:
|
||||
val |= (reg << 10) | (reg << 5);
|
||||
break;
|
||||
case DFA_PIX_32BIT:
|
||||
val |= (reg << 24);
|
||||
/* fall through */
|
||||
case DFA_PIX_24BIT:
|
||||
val |= (reg << 16) | (reg << 8);
|
||||
break;
|
||||
}
|
||||
pal[reg] = val;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gxt4500_pan_display(struct fb_var_screeninfo *var,
|
||||
struct fb_info *info)
|
||||
{
|
||||
struct gxt4500_par *par = info->par;
|
||||
|
||||
if (var->xoffset & 7)
|
||||
return -EINVAL;
|
||||
if (var->xoffset + var->xres > var->xres_virtual ||
|
||||
var->yoffset + var->yres > var->yres_virtual)
|
||||
return -EINVAL;
|
||||
|
||||
writereg(par, REFRESH_START, (var->xoffset << 16) | var->yoffset);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gxt4500_blank(int blank, struct fb_info *info)
|
||||
{
|
||||
struct gxt4500_par *par = info->par;
|
||||
int ctrl, dctl;
|
||||
|
||||
ctrl = readreg(par, SYNC_CTL);
|
||||
ctrl &= ~(SYNC_CTL_SYNC_OFF | SYNC_CTL_HSYNC_OFF | SYNC_CTL_VSYNC_OFF);
|
||||
dctl = readreg(par, DISP_CTL);
|
||||
dctl |= DISP_CTL_OFF;
|
||||
switch (blank) {
|
||||
case FB_BLANK_UNBLANK:
|
||||
dctl &= ~DISP_CTL_OFF;
|
||||
break;
|
||||
case FB_BLANK_POWERDOWN:
|
||||
ctrl |= SYNC_CTL_SYNC_OFF;
|
||||
break;
|
||||
case FB_BLANK_HSYNC_SUSPEND:
|
||||
ctrl |= SYNC_CTL_HSYNC_OFF;
|
||||
break;
|
||||
case FB_BLANK_VSYNC_SUSPEND:
|
||||
ctrl |= SYNC_CTL_VSYNC_OFF;
|
||||
break;
|
||||
default: ;
|
||||
}
|
||||
writereg(par, SYNC_CTL, ctrl);
|
||||
writereg(par, DISP_CTL, dctl);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct fb_fix_screeninfo gxt4500_fix __devinitdata = {
|
||||
.id = "IBM GXT4500P",
|
||||
.type = FB_TYPE_PACKED_PIXELS,
|
||||
.visual = FB_VISUAL_PSEUDOCOLOR,
|
||||
.xpanstep = 8,
|
||||
.ypanstep = 1,
|
||||
.mmio_len = 0x20000,
|
||||
};
|
||||
|
||||
static struct fb_ops gxt4500_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.fb_check_var = gxt4500_check_var,
|
||||
.fb_set_par = gxt4500_set_par,
|
||||
.fb_setcolreg = gxt4500_setcolreg,
|
||||
.fb_pan_display = gxt4500_pan_display,
|
||||
.fb_blank = gxt4500_blank,
|
||||
.fb_fillrect = cfb_fillrect,
|
||||
.fb_copyarea = cfb_copyarea,
|
||||
.fb_imageblit = cfb_imageblit,
|
||||
};
|
||||
|
||||
/* PCI functions */
|
||||
static int __devinit gxt4500_probe(struct pci_dev *pdev,
|
||||
const struct pci_device_id *ent)
|
||||
{
|
||||
int err;
|
||||
unsigned long reg_phys, fb_phys;
|
||||
struct gxt4500_par *par;
|
||||
struct fb_info *info;
|
||||
struct fb_var_screeninfo var;
|
||||
|
||||
err = pci_enable_device(pdev);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot enable PCI device: %d\n",
|
||||
err);
|
||||
return err;
|
||||
}
|
||||
|
||||
reg_phys = pci_resource_start(pdev, 0);
|
||||
if (!request_mem_region(reg_phys, pci_resource_len(pdev, 0),
|
||||
"gxt4500 regs")) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot get registers\n");
|
||||
goto err_nodev;
|
||||
}
|
||||
|
||||
fb_phys = pci_resource_start(pdev, 1);
|
||||
if (!request_mem_region(fb_phys, pci_resource_len(pdev, 1),
|
||||
"gxt4500 FB")) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot get framebuffer\n");
|
||||
goto err_free_regs;
|
||||
}
|
||||
|
||||
info = framebuffer_alloc(sizeof(struct gxt4500_par), &pdev->dev);
|
||||
if (!info) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot alloc FB info record");
|
||||
goto err_free_fb;
|
||||
}
|
||||
par = info->par;
|
||||
info->fix = gxt4500_fix;
|
||||
info->pseudo_palette = par->pseudo_palette;
|
||||
|
||||
info->fix.mmio_start = reg_phys;
|
||||
par->regs = ioremap(reg_phys, pci_resource_len(pdev, 0));
|
||||
if (!par->regs) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot map registers\n");
|
||||
goto err_free_all;
|
||||
}
|
||||
|
||||
info->fix.smem_start = fb_phys;
|
||||
info->fix.smem_len = pci_resource_len(pdev, 1);
|
||||
info->screen_base = ioremap(fb_phys, pci_resource_len(pdev, 1));
|
||||
if (!info->screen_base) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot map framebuffer\n");
|
||||
goto err_unmap_regs;
|
||||
}
|
||||
|
||||
pci_set_drvdata(pdev, info);
|
||||
|
||||
/* Set byte-swapping for DFA aperture for all pixel sizes */
|
||||
pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);
|
||||
|
||||
info->fbops = &gxt4500_ops;
|
||||
info->flags = FBINFO_FLAG_DEFAULT;
|
||||
|
||||
err = fb_alloc_cmap(&info->cmap, 256, 0);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot allocate cmap\n");
|
||||
goto err_unmap_all;
|
||||
}
|
||||
|
||||
gxt4500_blank(FB_BLANK_UNBLANK, info);
|
||||
|
||||
if (!fb_find_mode(&var, info, mode_option, NULL, 0, &defaultmode, 8)) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot find valid video mode\n");
|
||||
goto err_free_cmap;
|
||||
}
|
||||
info->var = var;
|
||||
if (gxt4500_set_par(info)) {
|
||||
printk(KERN_ERR "gxt4500: cannot set video mode\n");
|
||||
goto err_free_cmap;
|
||||
}
|
||||
|
||||
if (register_framebuffer(info) < 0) {
|
||||
dev_err(&pdev->dev, "gxt4500: cannot register framebuffer\n");
|
||||
goto err_free_cmap;
|
||||
}
|
||||
printk(KERN_INFO "fb%d: %s frame buffer device\n",
|
||||
info->node, info->fix.id);
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_cmap:
|
||||
fb_dealloc_cmap(&info->cmap);
|
||||
err_unmap_all:
|
||||
iounmap(info->screen_base);
|
||||
err_unmap_regs:
|
||||
iounmap(par->regs);
|
||||
err_free_all:
|
||||
framebuffer_release(info);
|
||||
err_free_fb:
|
||||
release_mem_region(fb_phys, pci_resource_len(pdev, 1));
|
||||
err_free_regs:
|
||||
release_mem_region(reg_phys, pci_resource_len(pdev, 0));
|
||||
err_nodev:
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
static void __devexit gxt4500_remove(struct pci_dev *pdev)
|
||||
{
|
||||
struct fb_info *info = pci_get_drvdata(pdev);
|
||||
struct gxt4500_par *par;
|
||||
|
||||
if (!info)
|
||||
return;
|
||||
par = info->par;
|
||||
unregister_framebuffer(info);
|
||||
fb_dealloc_cmap(&info->cmap);
|
||||
iounmap(par->regs);
|
||||
iounmap(info->screen_base);
|
||||
release_mem_region(pci_resource_start(pdev, 0),
|
||||
pci_resource_len(pdev, 0));
|
||||
release_mem_region(pci_resource_start(pdev, 1),
|
||||
pci_resource_len(pdev, 1));
|
||||
framebuffer_release(info);
|
||||
}
|
||||
|
||||
/* supported chipsets */
|
||||
static const struct pci_device_id gxt4500_pci_tbl[] = {
|
||||
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_GXT4500P,
|
||||
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
|
||||
{ 0 }
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(pci, gxt4500_pci_tbl);
|
||||
|
||||
static struct pci_driver gxt4500_driver = {
|
||||
.name = "gxt4500",
|
||||
.id_table = gxt4500_pci_tbl,
|
||||
.probe = gxt4500_probe,
|
||||
.remove = __devexit_p(gxt4500_remove),
|
||||
};
|
||||
|
||||
static int __devinit gxt4500_init(void)
|
||||
{
|
||||
#ifndef MODULE
|
||||
if (fb_get_options("gxt4500", &mode_option))
|
||||
return -ENODEV;
|
||||
#endif
|
||||
|
||||
return pci_register_driver(&gxt4500_driver);
|
||||
}
|
||||
module_init(gxt4500_init);
|
||||
|
||||
static void __exit gxt4500_exit(void)
|
||||
{
|
||||
pci_unregister_driver(&gxt4500_driver);
|
||||
}
|
||||
module_exit(gxt4500_exit);
|
||||
|
||||
MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
|
||||
MODULE_DESCRIPTION("FBDev driver for IBM GXT4500P");
|
||||
MODULE_LICENSE("GPL");
|
||||
module_param(mode_option, charp, 0);
|
||||
MODULE_PARM_DESC(mode_option, "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
|
Loading…
Reference in a new issue