diff options
| -rw-r--r-- | drivers/video/geode/Makefile | 2 | ||||
| -rw-r--r-- | drivers/video/geode/gxfb.h | 72 | ||||
| -rw-r--r-- | drivers/video/geode/gxfb_core.c | 57 | ||||
| -rw-r--r-- | drivers/video/geode/suspend_gx.c | 267 |
4 files changed, 396 insertions, 2 deletions
diff --git a/drivers/video/geode/Makefile b/drivers/video/geode/Makefile index 957304b45fb..5c98da12688 100644 --- a/drivers/video/geode/Makefile +++ b/drivers/video/geode/Makefile @@ -5,5 +5,5 @@ obj-$(CONFIG_FB_GEODE_GX) += gxfb.o obj-$(CONFIG_FB_GEODE_LX) += lxfb.o gx1fb-objs := gx1fb_core.o display_gx1.o video_cs5530.o -gxfb-objs := gxfb_core.o display_gx.o video_gx.o +gxfb-objs := gxfb_core.o display_gx.o video_gx.o suspend_gx.o lxfb-objs := lxfb_core.o lxfb_ops.o diff --git a/drivers/video/geode/gxfb.h b/drivers/video/geode/gxfb.h index b8db7f82646..16a96f8fd8c 100644 --- a/drivers/video/geode/gxfb.h +++ b/drivers/video/geode/gxfb.h @@ -13,10 +13,34 @@ #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); @@ -29,6 +53,43 @@ 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 { @@ -238,6 +299,16 @@ enum fp_registers { /* 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); @@ -248,7 +319,6 @@ 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); diff --git a/drivers/video/geode/gxfb_core.c b/drivers/video/geode/gxfb_core.c index fc56b8fc1a8..151d964c025 100644 --- a/drivers/video/geode/gxfb_core.c +++ b/drivers/video/geode/gxfb_core.c @@ -28,6 +28,7 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/fb.h> +#include <linux/console.h> #include <linux/init.h> #include <linux/pci.h> #include <asm/geode.h> @@ -222,6 +223,15 @@ static int __init gxfb_map_video_memory(struct fb_info *info, struct pci_dev *de if (!par->dc_regs) return -ENOMEM; + ret = pci_request_region(dev, 1, "gxfb (graphics processor)"); + if (ret < 0) + return ret; + par->gp_regs = ioremap(pci_resource_start(dev, 1), + pci_resource_len(dev, 1)); + + if (!par->gp_regs) + return -ENOMEM; + ret = pci_request_region(dev, 0, "gxfb (framebuffer)"); if (ret < 0) return ret; @@ -295,6 +305,42 @@ static struct fb_info * __init gxfb_init_fbinfo(struct device *dev) return info; } +#ifdef CONFIG_PM +static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct fb_info *info = pci_get_drvdata(pdev); + + if (state.event == PM_EVENT_SUSPEND) { + acquire_console_sem(); + gx_powerdown(info); + fb_set_suspend(info, 1); + release_console_sem(); + } + + /* there's no point in setting PCI states; we emulate PCI, so + * we don't end up getting power savings anyways */ + + return 0; +} + +static int gxfb_resume(struct pci_dev *pdev) +{ + struct fb_info *info = pci_get_drvdata(pdev); + int ret; + + acquire_console_sem(); + ret = gx_powerup(info); + if (ret) { + printk(KERN_ERR "gxfb: power up failed!\n"); + return ret; + } + + fb_set_suspend(info, 0); + release_console_sem(); + return 0; +} +#endif + static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct gxfb_par *par; @@ -357,6 +403,10 @@ static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *i iounmap(par->dc_regs); pci_release_region(pdev, 2); } + if (par->gp_regs) { + iounmap(par->gp_regs); + pci_release_region(pdev, 1); + } if (info) framebuffer_release(info); @@ -379,6 +429,9 @@ static void gxfb_remove(struct pci_dev *pdev) iounmap(par->dc_regs); pci_release_region(pdev, 2); + iounmap(par->gp_regs); + pci_release_region(pdev, 1); + pci_set_drvdata(pdev, NULL); framebuffer_release(info); @@ -396,6 +449,10 @@ static struct pci_driver gxfb_driver = { .id_table = gxfb_id_table, .probe = gxfb_probe, .remove = gxfb_remove, +#ifdef CONFIG_PM + .suspend = gxfb_suspend, + .resume = gxfb_resume, +#endif }; #ifndef MODULE diff --git a/drivers/video/geode/suspend_gx.c b/drivers/video/geode/suspend_gx.c new file mode 100644 index 00000000000..9aff32ef8bb --- /dev/null +++ b/drivers/video/geode/suspend_gx.c @@ -0,0 +1,267 @@ +/* + * Copyright (C) 2007 Advanced Micro Devices, Inc. + * Copyright (C) 2008 Andres Salomon <dilinger@debian.org> + * + * 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. + */ +#include <linux/fb.h> +#include <asm/io.h> +#include <asm/msr.h> +#include <asm/geode.h> +#include <asm/delay.h> + +#include "gxfb.h" + +#ifdef CONFIG_PM + +static void gx_save_regs(struct gxfb_par *par) +{ + int i; + + /* wait for the BLT engine to stop being busy */ + do { + i = read_gp(par, GP_BLT_STATUS); + } while (i & (GP_BLT_STATUS_BLT_PENDING | GP_BLT_STATUS_BLT_BUSY)); + + /* save MSRs */ + rdmsrl(MSR_GX_MSR_PADSEL, par->msr.padsel); + rdmsrl(MSR_GLCP_DOTPLL, par->msr.dotpll); + + write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); + + /* save registers */ + memcpy(par->gp, par->gp_regs, sizeof(par->gp)); + memcpy(par->dc, par->dc_regs, sizeof(par->dc)); + memcpy(par->vp, par->vid_regs, sizeof(par->vp)); + memcpy(par->fp, par->vid_regs + VP_FP_START, sizeof(par->fp)); + + /* save the palette */ + write_dc(par, DC_PAL_ADDRESS, 0); + for (i = 0; i < ARRAY_SIZE(par->pal); i++) + par->pal[i] = read_dc(par, DC_PAL_DATA); +} + +static void gx_set_dotpll(uint32_t dotpll_hi) +{ + uint32_t dotpll_lo; + int i; + + rdmsrl(MSR_GLCP_DOTPLL, dotpll_lo); + dotpll_lo |= MSR_GLCP_DOTPLL_DOTRESET; + dotpll_lo &= ~MSR_GLCP_DOTPLL_BYPASS; + wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); + + /* wait for the PLL to lock */ + for (i = 0; i < 200; i++) { + rdmsrl(MSR_GLCP_DOTPLL, dotpll_lo); + if (dotpll_lo & MSR_GLCP_DOTPLL_LOCK) + break; + udelay(1); + } + + /* PLL set, unlock */ + dotpll_lo &= ~MSR_GLCP_DOTPLL_DOTRESET; + wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi); +} + +static void gx_restore_gfx_proc(struct gxfb_par *par) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(par->gp); i++) { + switch (i) { + case GP_VECTOR_MODE: + case GP_BLT_MODE: + case GP_BLT_STATUS: + case GP_HST_SRC: + /* don't restore these registers */ + break; + default: + write_gp(par, i, par->gp[i]); + } + } +} + +static void gx_restore_display_ctlr(struct gxfb_par *par) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(par->dc); i++) { + switch (i) { + case DC_UNLOCK: + /* unlock the DC; runs first */ + write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); + break; + + case DC_GENERAL_CFG: + /* write without the enables */ + write_dc(par, i, par->dc[i] & ~(DC_GENERAL_CFG_VIDE | + DC_GENERAL_CFG_ICNE | + DC_GENERAL_CFG_CURE | + DC_GENERAL_CFG_DFLE)); + break; + + case DC_DISPLAY_CFG: + /* write without the enables */ + write_dc(par, i, par->dc[i] & ~(DC_DISPLAY_CFG_VDEN | + DC_DISPLAY_CFG_GDEN | + DC_DISPLAY_CFG_TGEN)); + break; + + case DC_RSVD_0: + case DC_RSVD_1: + case DC_RSVD_2: + case DC_RSVD_3: + case DC_RSVD_4: + case DC_LINE_CNT: + case DC_PAL_ADDRESS: + case DC_PAL_DATA: + case DC_DFIFO_DIAG: + case DC_CFIFO_DIAG: + case DC_RSVD_5: + /* don't restore these registers */ + break; + default: + write_dc(par, i, par->dc[i]); + } + } + + /* restore the palette */ + write_dc(par, DC_PAL_ADDRESS, 0); + for (i = 0; i < ARRAY_SIZE(par->pal); i++) + write_dc(par, DC_PAL_DATA, par->pal[i]); +} + +static void gx_restore_video_proc(struct gxfb_par *par) +{ + int i; + + wrmsrl(MSR_GX_MSR_PADSEL, par->msr.padsel); + + for (i = 0; i < ARRAY_SIZE(par->vp); i++) { + switch (i) { + case VP_VCFG: + /* don't enable video yet */ + write_vp(par, i, par->vp[i] & ~VP_VCFG_VID_EN); + break; + + case VP_DCFG: + /* don't enable CRT yet */ + write_vp(par, i, par->vp[i] & + ~(VP_DCFG_DAC_BL_EN | VP_DCFG_VSYNC_EN | + VP_DCFG_HSYNC_EN | VP_DCFG_CRT_EN)); + break; + + case VP_GAR: + case VP_GDR: + case VP_RSVD_0: + case VP_RSVD_1: + case VP_RSVD_2: + case VP_RSVD_3: + case VP_CRC32: + case VP_AWT: + case VP_VTM: + /* don't restore these registers */ + break; + default: + write_vp(par, i, par->vp[i]); + } + } +} + +static void gx_restore_regs(struct gxfb_par *par) +{ + int i; + + gx_set_dotpll((uint32_t) (par->msr.dotpll >> 32)); + gx_restore_gfx_proc(par); + gx_restore_display_ctlr(par); + gx_restore_video_proc(par); + + /* Flat Panel */ + for (i = 0; i < ARRAY_SIZE(par->fp); i++) { + if (i != FP_PM && i != FP_RSVD_0) + write_fp(par, i, par->fp[i]); + } +} + +static void gx_disable_graphics(struct gxfb_par *par) +{ + /* shut down the engine */ + write_vp(par, VP_VCFG, par->vp[VP_VCFG] & ~VP_VCFG_VID_EN); + write_vp(par, VP_DCFG, par->vp[VP_DCFG] & ~(VP_DCFG_DAC_BL_EN | + VP_DCFG_VSYNC_EN | VP_DCFG_HSYNC_EN | VP_DCFG_CRT_EN)); + + /* turn off the flat panel */ + write_fp(par, FP_PM, par->fp[FP_PM] & ~FP_PM_P); + + + /* turn off display */ + write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); + write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG] & + ~(DC_GENERAL_CFG_VIDE | DC_GENERAL_CFG_ICNE | + DC_GENERAL_CFG_CURE | DC_GENERAL_CFG_DFLE)); + write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG] & + ~(DC_DISPLAY_CFG_VDEN | DC_DISPLAY_CFG_GDEN | + DC_DISPLAY_CFG_TGEN)); + write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); +} + +static void gx_enable_graphics(struct gxfb_par *par) +{ + uint32_t fp; + + fp = read_fp(par, FP_PM); + if (par->fp[FP_PM] & FP_PM_P) { + /* power on the panel if not already power{ed,ing} on */ + if (!(fp & (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP))) + write_fp(par, FP_PM, par->fp[FP_PM]); + } else { + /* power down the panel if not already power{ed,ing} down */ + if (!(fp & (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN))) + write_fp(par, FP_PM, par->fp[FP_PM]); + } + + /* turn everything on */ + write_vp(par, VP_VCFG, par->vp[VP_VCFG]); + write_vp(par, VP_DCFG, par->vp[VP_DCFG]); + write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]); + /* do this last; it will enable the FIFO load */ + write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]); + + /* lock the door behind us */ + write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); +} + +int gx_powerdown(struct fb_info *info) +{ + struct gxfb_par *par = info->par; + + if (par->powered_down) + return 0; + + gx_save_regs(par); + gx_disable_graphics(par); + + par->powered_down = 1; + return 0; +} + +int gx_powerup(struct fb_info *info) +{ + struct gxfb_par *par = info->par; + + if (!par->powered_down) + return 0; + + gx_restore_regs(par); + gx_enable_graphics(par); + + par->powered_down = 0; + return 0; +} + +#endif |