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android_kernel_motorola_sm6225/drivers/video/geode/gxfb.h
Andres Salomon 46fb6f110d gxfb: add power management functionality 
This adds the ability to suspend/resume the gxfb driver, which includes:
  - The addition of a Graphics Processor register table in gxfb.h, and
    associated GP handling.
  - Register and palette saving code; registers are stored in gxfb_par.
    A few MSR values are saved as well.
  - gx_powerup and gx_powerdown functions which restore/save registers and
    enable/disable graphic engines.
  - gxfb_suspend/gxfb_resume

Originally based on a patch by Jordan Crouse.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Jordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-28 08:58:36 -07:00

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/*
* Copyright (C) 2008 Andres Salomon <dilinger@debian.org>
*
* Geode GX2 header information
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _GXFB_H_
#define _GXFB_H_
#include <linux/io.h>
#define GP_REG_COUNT (0x50 / 4)
#define DC_REG_COUNT (0x90 / 4)
#define VP_REG_COUNT (0x138 / 8)
#define FP_REG_COUNT (0x68 / 8)
#define DC_PAL_COUNT 0x104
struct gxfb_par {
int enable_crt;
void __iomem *dc_regs;
void __iomem *vid_regs;
void __iomem *gp_regs;
#ifdef CONFIG_PM
int powered_down;
/* register state, for power management functionality */
struct {
uint64_t padsel;
uint64_t dotpll;
} msr;
uint32_t gp[GP_REG_COUNT];
uint32_t dc[DC_REG_COUNT];
uint64_t vp[VP_REG_COUNT];
uint64_t fp[FP_REG_COUNT];
uint32_t pal[DC_PAL_COUNT];
#endif
};
unsigned int gx_frame_buffer_size(void);
int gx_line_delta(int xres, int bpp);
void gx_set_mode(struct fb_info *info);
void gx_set_hw_palette_reg(struct fb_info *info, unsigned regno,
unsigned red, unsigned green, unsigned blue);
void gx_set_dclk_frequency(struct fb_info *info);
void gx_configure_display(struct fb_info *info);
int gx_blank_display(struct fb_info *info, int blank_mode);
#ifdef CONFIG_PM
int gx_powerdown(struct fb_info *info);
int gx_powerup(struct fb_info *info);
#endif
/* Graphics Processor registers (table 6-23 from the data book) */
enum gp_registers {
GP_DST_OFFSET = 0,
GP_SRC_OFFSET,
GP_STRIDE,
GP_WID_HEIGHT,
GP_SRC_COLOR_FG,
GP_SRC_COLOR_BG,
GP_PAT_COLOR_0,
GP_PAT_COLOR_1,
GP_PAT_COLOR_2,
GP_PAT_COLOR_3,
GP_PAT_COLOR_4,
GP_PAT_COLOR_5,
GP_PAT_DATA_0,
GP_PAT_DATA_1,
GP_RASTER_MODE,
GP_VECTOR_MODE,
GP_BLT_MODE,
GP_BLT_STATUS,
GP_HST_SRC,
GP_BASE_OFFSET, /* 0x4c */
};
#define GP_BLT_STATUS_BLT_PENDING (1 << 2)
#define GP_BLT_STATUS_BLT_BUSY (1 << 0)
/* Display Controller registers (table 6-38 from the data book) */
enum dc_registers {
DC_UNLOCK = 0,
DC_GENERAL_CFG,
DC_DISPLAY_CFG,
DC_RSVD_0,
DC_FB_ST_OFFSET,
DC_CB_ST_OFFSET,
DC_CURS_ST_OFFSET,
DC_ICON_ST_OFFSET,
DC_VID_Y_ST_OFFSET,
DC_VID_U_ST_OFFSET,
DC_VID_V_ST_OFFSET,
DC_RSVD_1,
DC_LINE_SIZE,
DC_GFX_PITCH,
DC_VID_YUV_PITCH,
DC_RSVD_2,
DC_H_ACTIVE_TIMING,
DC_H_BLANK_TIMING,
DC_H_SYNC_TIMING,
DC_RSVD_3,
DC_V_ACTIVE_TIMING,
DC_V_BLANK_TIMING,
DC_V_SYNC_TIMING,
DC_RSVD_4,
DC_CURSOR_X,
DC_CURSOR_Y,
DC_ICON_X,
DC_LINE_CNT,
DC_PAL_ADDRESS,
DC_PAL_DATA,
DC_DFIFO_DIAG,
DC_CFIFO_DIAG,
DC_VID_DS_DELTA,
DC_GLIU0_MEM_OFFSET,
DC_RSVD_5,
DC_DV_ACC, /* 0x8c */
};
#define DC_UNLOCK_LOCK 0x00000000
#define DC_UNLOCK_UNLOCK 0x00004758 /* magic value */
#define DC_GENERAL_CFG_YUVM (1 << 20)
#define DC_GENERAL_CFG_VDSE (1 << 19)
#define DC_GENERAL_CFG_DFHPEL_SHIFT 12
#define DC_GENERAL_CFG_DFHPSL_SHIFT 8
#define DC_GENERAL_CFG_DECE (1 << 6)
#define DC_GENERAL_CFG_CMPE (1 << 5)
#define DC_GENERAL_CFG_VIDE (1 << 3)
#define DC_GENERAL_CFG_ICNE (1 << 2)
#define DC_GENERAL_CFG_CURE (1 << 1)
#define DC_GENERAL_CFG_DFLE (1 << 0)
#define DC_DISPLAY_CFG_A20M (1 << 31)
#define DC_DISPLAY_CFG_A18M (1 << 30)
#define DC_DISPLAY_CFG_PALB (1 << 25)
#define DC_DISPLAY_CFG_DISP_MODE_24BPP (1 << 9)
#define DC_DISPLAY_CFG_DISP_MODE_16BPP (1 << 8)
#define DC_DISPLAY_CFG_DISP_MODE_8BPP (0)
#define DC_DISPLAY_CFG_VDEN (1 << 4)
#define DC_DISPLAY_CFG_GDEN (1 << 3)
#define DC_DISPLAY_CFG_TGEN (1 << 0)
/*
* Video Processor registers (table 6-54).
* There is space for 64 bit values, but we never use more than the
* lower 32 bits. The actual register save/restore code only bothers
* to restore those 32 bits.
*/
enum vp_registers {
VP_VCFG = 0,
VP_DCFG,
VP_VX,
VP_VY,
VP_VS,
VP_VCK,
VP_VCM,
VP_GAR,
VP_GDR,
VP_RSVD_0,
VP_MISC,
VP_CCS,
VP_RSVD_1,
VP_RSVD_2,
VP_RSVD_3,
VP_VDC,
VP_VCO,
VP_CRC,
VP_CRC32,
VP_VDE,
VP_CCK,
VP_CCM,
VP_CC1,
VP_CC2,
VP_A1X,
VP_A1Y,
VP_A1C,
VP_A1T,
VP_A2X,
VP_A2Y,
VP_A2C,
VP_A2T,
VP_A3X,
VP_A3Y,
VP_A3C,
VP_A3T,
VP_VRR,
VP_AWT,
VP_VTM, /* 0x130 */
};
#define VP_VCFG_VID_EN (1 << 0)
#define VP_DCFG_DAC_VREF (1 << 26)
#define VP_DCFG_GV_GAM (1 << 21)
#define VP_DCFG_VG_CK (1 << 20)
#define VP_DCFG_CRT_SYNC_SKW_DEFAULT (1 << 16)
#define VP_DCFG_CRT_SYNC_SKW ((1 << 14) | (1 << 15) | (1 << 16))
#define VP_DCFG_CRT_VSYNC_POL (1 << 9)
#define VP_DCFG_CRT_HSYNC_POL (1 << 8)
#define VP_DCFG_FP_DATA_EN (1 << 7) /* undocumented */
#define VP_DCFG_FP_PWR_EN (1 << 6) /* undocumented */
#define VP_DCFG_DAC_BL_EN (1 << 3)
#define VP_DCFG_VSYNC_EN (1 << 2)
#define VP_DCFG_HSYNC_EN (1 << 1)
#define VP_DCFG_CRT_EN (1 << 0)
#define VP_MISC_GAM_EN (1 << 0)
#define VP_MISC_DACPWRDN (1 << 10)
#define VP_MISC_APWRDN (1 << 11)
/*
* Flat Panel registers (table 6-55).
* Also 64 bit registers; see above note about 32-bit handling.
*/
/* we're actually in the VP register space, starting at address 0x400 */
#define VP_FP_START 0x400
enum fp_registers {
FP_PT1 = 0,
FP_PT2,
FP_PM,
FP_DFC,
FP_BLFSR,
FP_RLFSR,
FP_FMI,
FP_FMD,
FP_RSVD_0,
FP_DCA,
FP_DMD,
FP_CRC,
FP_FBB, /* 0x460 */
};
#define FP_PT1_VSIZE_SHIFT 16 /* undocumented? */
#define FP_PT1_VSIZE_MASK 0x7FF0000 /* undocumented? */
#define FP_PT2_HSP (1 << 22)
#define FP_PT2_VSP (1 << 23)
#define FP_PM_P (1 << 24) /* panel power on */
#define FP_PM_PANEL_PWR_UP (1 << 3) /* r/o */
#define FP_PM_PANEL_PWR_DOWN (1 << 2) /* r/o */
#define FP_PM_PANEL_OFF (1 << 1) /* r/o */
#define FP_PM_PANEL_ON (1 << 0) /* r/o */
#define FP_DFC_NFI ((1 << 4) | (1 << 5) | (1 << 6))
/* register access functions */
static inline uint32_t read_gp(struct gxfb_par *par, int reg)
{
return readl(par->gp_regs + 4*reg);
}
static inline void write_gp(struct gxfb_par *par, int reg, uint32_t val)
{
writel(val, par->gp_regs + 4*reg);
}
static inline uint32_t read_dc(struct gxfb_par *par, int reg)
{
return readl(par->dc_regs + 4*reg);
}
static inline void write_dc(struct gxfb_par *par, int reg, uint32_t val)
{
writel(val, par->dc_regs + 4*reg);
}
static inline uint32_t read_vp(struct gxfb_par *par, int reg)
{
return readl(par->vid_regs + 8*reg);
}
static inline void write_vp(struct gxfb_par *par, int reg, uint32_t val)
{
writel(val, par->vid_regs + 8*reg);
}
static inline uint32_t read_fp(struct gxfb_par *par, int reg)
{
return readl(par->vid_regs + 8*reg + VP_FP_START);
}
static inline void write_fp(struct gxfb_par *par, int reg, uint32_t val)
{
writel(val, par->vid_regs + 8*reg + VP_FP_START);
}
/* MSRs are defined in asm/geode.h; their bitfields are here */
#define MSR_GLCP_SYS_RSTPLL_DOTPOSTDIV3 (1 << 3)
#define MSR_GLCP_SYS_RSTPLL_DOTPREMULT2 (1 << 2)
#define MSR_GLCP_SYS_RSTPLL_DOTPREDIV2 (1 << 1)
#define MSR_GLCP_DOTPLL_LOCK (1 << 25) /* r/o */
#define MSR_GLCP_DOTPLL_BYPASS (1 << 15)
#define MSR_GLCP_DOTPLL_DOTRESET (1 << 0)
#define MSR_GX_MSR_PADSEL_MASK 0x3FFFFFFF /* undocumented? */
#define MSR_GX_MSR_PADSEL_TFT 0x1FFFFFFF /* undocumented? */
#define MSR_GX_GLD_MSR_CONFIG_FP (1 << 3)
#endif
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