diff options
Diffstat (limited to 'drivers/staging/sm750fb')
-rw-r--r-- | drivers/staging/sm750fb/sm750_hw.c | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/drivers/staging/sm750fb/sm750_hw.c b/drivers/staging/sm750fb/sm750_hw.c index 052f113..f2ed82e 100644 --- a/drivers/staging/sm750fb/sm750_hw.c +++ b/drivers/staging/sm750fb/sm750_hw.c @@ -35,17 +35,17 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_dev *pdev) pr_info("mmio phyAddr = %lx\n", sm750_dev->vidreg_start); /* reserve the vidreg space of smi adaptor - * if you do this, u need to add release region code + * if you do this, you need to add release region code * in lynxfb_remove, or memory will not be mapped again * successfully - * */ + */ ret = pci_request_region(pdev, 1, "sm750fb"); if (ret) { pr_err("Can not request PCI regions.\n"); goto exit; } - /* now map mmio and vidmem*/ + /* now map mmio and vidmem */ sm750_dev->pvReg = ioremap_nocache(sm750_dev->vidreg_start, sm750_dev->vidreg_size); if (!sm750_dev->pvReg) { @@ -63,10 +63,10 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_dev *pdev) sm750_dev->vidmem_start = pci_resource_start(pdev, 0); /* don't use pdev_resource[x].end - resource[x].start to - * calculate the resource size,its only the maximum available - * size but not the actual size,use + * calculate the resource size, it's only the maximum available + * size but not the actual size, using * @ddk750_getVMSize function can be safe. - * */ + */ sm750_dev->vidmem_size = ddk750_getVMSize(); pr_info("video memory phyAddr = %lx, size = %u bytes\n", sm750_dev->vidmem_start, sm750_dev->vidmem_size); @@ -101,7 +101,7 @@ int hw_sm750_inithw(struct sm750_dev *sm750_dev, struct pci_dev *pdev) parm->master_clk = parm->chip_clk / 3; ddk750_initHw((initchip_param_t *)&sm750_dev->initParm); - /* for sm718,open pci burst */ + /* for sm718, open pci burst */ if (sm750_dev->devid == 0x718) { POKE32(SYSTEM_CTRL, PEEK32(SYSTEM_CTRL) | SYSTEM_CTRL_PCI_BURST); @@ -109,7 +109,7 @@ int hw_sm750_inithw(struct sm750_dev *sm750_dev, struct pci_dev *pdev) if (getChipType() != SM750LE) { unsigned int val; - /* does user need CRT ?*/ + /* does user need CRT? */ if (sm750_dev->nocrt) { POKE32(MISC_CTRL, PEEK32(MISC_CTRL) | MISC_CTRL_DAC_POWER_OFF); @@ -141,19 +141,21 @@ int hw_sm750_inithw(struct sm750_dev *sm750_dev, struct pci_dev *pdev) } POKE32(PANEL_DISPLAY_CTRL, val); } else { - /* for 750LE ,no DVI chip initialization makes Monitor no signal */ - /* Set up GPIO for software I2C to program DVI chip in the - Xilinx SP605 board, in order to have video signal. + /* for 750LE, no DVI chip initialization + * makes Monitor no signal + * + * Set up GPIO for software I2C to program DVI chip in the + * Xilinx SP605 board, in order to have video signal. */ sm750_sw_i2c_init(0, 1); /* Customer may NOT use CH7301 DVI chip, which has to be - initialized differently. - */ + * initialized differently. + */ if (sm750_sw_i2c_read_reg(0xec, 0x4a) == 0x95) { /* The following register values for CH7301 are from - Chrontel app note and our experiment. - */ + * Chrontel app note and our experiment. + */ pr_info("yes,CH7301 DVI chip found\n"); sm750_sw_i2c_write_reg(0xec, 0x1d, 0x16); sm750_sw_i2c_write_reg(0xec, 0x21, 0x9); @@ -198,7 +200,7 @@ int hw_sm750_output_setMode(struct lynxfb_output *output, } ddk750_setLogicalDispOut(dispSet); } else { - /* just open DISPLAY_CONTROL_750LE register bit 3:0*/ + /* just open DISPLAY_CONTROL_750LE register bit 3:0 */ u32 reg; reg = PEEK32(DISPLAY_CONTROL_750LE); @@ -234,9 +236,7 @@ int hw_sm750_crtc_checkMode(struct lynxfb_crtc *crtc, struct fb_var_screeninfo * return 0; } -/* - set the controller's mode for @crtc charged with @var and @fix parameters -*/ +/* set the controller's mode for @crtc charged with @var and @fix parameters */ int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc, struct fb_var_screeninfo *var, struct fb_fix_screeninfo *fix) @@ -300,12 +300,14 @@ int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc, } if (crtc->channel != sm750_secondary) { - /* set pitch, offset ,width,start address ,etc... */ + /* set pitch, offset, width, start address, etc... */ POKE32(PANEL_FB_ADDRESS, crtc->oScreen & PANEL_FB_ADDRESS_ADDRESS_MASK); reg = var->xres * (var->bits_per_pixel >> 3); - /* crtc->channel is not equal to par->index on numeric,be aware of that */ + /* crtc->channel is not equal to par->index on numeric, + * be aware of that + */ reg = ALIGN(reg, crtc->line_pad); reg = (reg << PANEL_FB_WIDTH_WIDTH_SHIFT) & PANEL_FB_WIDTH_WIDTH_MASK; @@ -337,7 +339,9 @@ int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc, /* not implemented now */ POKE32(CRT_FB_ADDRESS, crtc->oScreen); reg = var->xres * (var->bits_per_pixel >> 3); - /* crtc->channel is not equal to par->index on numeric,be aware of that */ + /* crtc->channel is not equal to par->index on numeric, + * be aware of that + */ reg = ALIGN(reg, crtc->line_pad) << CRT_FB_WIDTH_WIDTH_SHIFT; reg &= CRT_FB_WIDTH_WIDTH_MASK; reg |= (fix->line_length & CRT_FB_WIDTH_OFFSET_MASK); |