diff options
Diffstat (limited to 'drivers/video/s3fb.c')
| -rw-r--r-- | drivers/video/s3fb.c | 206 |
1 files changed, 201 insertions, 5 deletions
diff --git a/drivers/video/s3fb.c b/drivers/video/s3fb.c index c4482f2e5799..9a345209535b 100644 --- a/drivers/video/s3fb.c +++ b/drivers/video/s3fb.c @@ -25,6 +25,9 @@ #include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */ #include <video/vga.h> +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> + #ifdef CONFIG_MTRR #include <asm/mtrr.h> #endif @@ -36,6 +39,12 @@ struct s3fb_info { struct mutex open_lock; unsigned int ref_count; u32 pseudo_palette[16]; +#ifdef CONFIG_FB_S3_DDC + u8 __iomem *mmio; + bool ddc_registered; + struct i2c_adapter ddc_adapter; + struct i2c_algo_bit_data ddc_algo; +#endif }; @@ -105,6 +114,9 @@ static const char * const s3_names[] = {"S3 Unknown", "S3 Trio32", "S3 Trio64", #define CHIP_UNDECIDED_FLAG 0x80 #define CHIP_MASK 0xFF +#define MMIO_OFFSET 0x1000000 +#define MMIO_SIZE 0x10000 + /* CRT timing register sets */ static const struct vga_regset s3_h_total_regs[] = {{0x00, 0, 7}, {0x5D, 0, 0}, VGA_REGSET_END}; @@ -140,7 +152,7 @@ static const struct svga_timing_regs s3_timing_regs = { /* Module parameters */ -static char *mode_option __devinitdata = "640x480-8@60"; +static char *mode_option __devinitdata; #ifdef CONFIG_MTRR static int mtrr __devinitdata = 1; @@ -169,6 +181,119 @@ MODULE_PARM_DESC(fasttext, "Enable S3 fast text mode (1=enable, 0=disable, defau /* ------------------------------------------------------------------------- */ +#ifdef CONFIG_FB_S3_DDC + +#define DDC_REG 0xaa /* Trio 3D/1X/2X */ +#define DDC_MMIO_REG 0xff20 /* all other chips */ +#define DDC_SCL_OUT (1 << 0) +#define DDC_SDA_OUT (1 << 1) +#define DDC_SCL_IN (1 << 2) +#define DDC_SDA_IN (1 << 3) +#define DDC_DRIVE_EN (1 << 4) + +static bool s3fb_ddc_needs_mmio(int chip) +{ + return !(chip == CHIP_360_TRIO3D_1X || + chip == CHIP_362_TRIO3D_2X || + chip == CHIP_368_TRIO3D_2X); +} + +static u8 s3fb_ddc_read(struct s3fb_info *par) +{ + if (s3fb_ddc_needs_mmio(par->chip)) + return readb(par->mmio + DDC_MMIO_REG); + else + return vga_rcrt(par->state.vgabase, DDC_REG); +} + +static void s3fb_ddc_write(struct s3fb_info *par, u8 val) +{ + if (s3fb_ddc_needs_mmio(par->chip)) + writeb(val, par->mmio + DDC_MMIO_REG); + else + vga_wcrt(par->state.vgabase, DDC_REG, val); +} + +static void s3fb_ddc_setscl(void *data, int val) +{ + struct s3fb_info *par = data; + unsigned char reg; + + reg = s3fb_ddc_read(par) | DDC_DRIVE_EN; + if (val) + reg |= DDC_SCL_OUT; + else + reg &= ~DDC_SCL_OUT; + s3fb_ddc_write(par, reg); +} + +static void s3fb_ddc_setsda(void *data, int val) +{ + struct s3fb_info *par = data; + unsigned char reg; + + reg = s3fb_ddc_read(par) | DDC_DRIVE_EN; + if (val) + reg |= DDC_SDA_OUT; + else + reg &= ~DDC_SDA_OUT; + s3fb_ddc_write(par, reg); +} + +static int s3fb_ddc_getscl(void *data) +{ + struct s3fb_info *par = data; + + return !!(s3fb_ddc_read(par) & DDC_SCL_IN); +} + +static int s3fb_ddc_getsda(void *data) +{ + struct s3fb_info *par = data; + + return !!(s3fb_ddc_read(par) & DDC_SDA_IN); +} + +static int __devinit s3fb_setup_ddc_bus(struct fb_info *info) +{ + struct s3fb_info *par = info->par; + + strlcpy(par->ddc_adapter.name, info->fix.id, + sizeof(par->ddc_adapter.name)); + par->ddc_adapter.owner = THIS_MODULE; + par->ddc_adapter.class = I2C_CLASS_DDC; + par->ddc_adapter.algo_data = &par->ddc_algo; + par->ddc_adapter.dev.parent = info->device; + par->ddc_algo.setsda = s3fb_ddc_setsda; + par->ddc_algo.setscl = s3fb_ddc_setscl; + par->ddc_algo.getsda = s3fb_ddc_getsda; + par->ddc_algo.getscl = s3fb_ddc_getscl; + par->ddc_algo.udelay = 10; + par->ddc_algo.timeout = 20; + par->ddc_algo.data = par; + + i2c_set_adapdata(&par->ddc_adapter, par); + + /* + * some Virge cards have external MUX to switch chip I2C bus between + * DDC and extension pins - switch it do DDC + */ +/* vga_wseq(par->state.vgabase, 0x08, 0x06); - not needed, already unlocked */ + if (par->chip == CHIP_357_VIRGE_GX2 || + par->chip == CHIP_359_VIRGE_GX2P) + svga_wseq_mask(par->state.vgabase, 0x0d, 0x01, 0x03); + else + svga_wseq_mask(par->state.vgabase, 0x0d, 0x00, 0x03); + /* some Virge need this or the DDC is ignored */ + svga_wcrt_mask(par->state.vgabase, 0x5c, 0x03, 0x03); + + return i2c_bit_add_bus(&par->ddc_adapter); +} +#endif /* CONFIG_FB_S3_DDC */ + + +/* ------------------------------------------------------------------------- */ + /* Set font in S3 fast text mode */ static void s3fb_settile_fast(struct fb_info *info, struct fb_tilemap *map) @@ -994,6 +1119,7 @@ static int __devinit s3_pci_probe(struct pci_dev *dev, const struct pci_device_i struct s3fb_info *par; int rc; u8 regval, cr38, cr39; + bool found = false; /* Ignore secondary VGA device because there is no VGA arbitration */ if (! svga_primary_device(dev)) { @@ -1110,12 +1236,69 @@ static int __devinit s3_pci_probe(struct pci_dev *dev, const struct pci_device_i info->fix.ypanstep = 0; info->fix.accel = FB_ACCEL_NONE; info->pseudo_palette = (void*) (par->pseudo_palette); + info->var.bits_per_pixel = 8; + +#ifdef CONFIG_FB_S3_DDC + /* Enable MMIO if needed */ + if (s3fb_ddc_needs_mmio(par->chip)) { + par->mmio = ioremap(info->fix.smem_start + MMIO_OFFSET, MMIO_SIZE); + if (par->mmio) + svga_wcrt_mask(par->state.vgabase, 0x53, 0x08, 0x08); /* enable MMIO */ + else + dev_err(info->device, "unable to map MMIO at 0x%lx, disabling DDC", + info->fix.smem_start + MMIO_OFFSET); + } + if (!s3fb_ddc_needs_mmio(par->chip) || par->mmio) + if (s3fb_setup_ddc_bus(info) == 0) { + u8 *edid = fb_ddc_read(&par->ddc_adapter); + par->ddc_registered = true; + if (edid) { + fb_edid_to_monspecs(edid, &info->monspecs); + kfree(edid); + if (!info->monspecs.modedb) + dev_err(info->device, "error getting mode database\n"); + else { + const struct fb_videomode *m; + + fb_videomode_to_modelist(info->monspecs.modedb, + info->monspecs.modedb_len, + &info->modelist); + m = fb_find_best_display(&info->monspecs, &info->modelist); + if (m) { + fb_videomode_to_var(&info->var, m); + /* fill all other info->var's fields */ + if (s3fb_check_var(&info->var, info) == 0) + found = true; + } + } + } + } +#endif + if (!mode_option && !found) + mode_option = "640x480-8@60"; /* Prepare startup mode */ - rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8); - if (! ((rc == 1) || (rc == 2))) { - rc = -EINVAL; - dev_err(info->device, "mode %s not found\n", mode_option); + if (mode_option) { + rc = fb_find_mode(&info->var, info, mode_option, + info->monspecs.modedb, info->monspecs.modedb_len, + NULL, info->var.bits_per_pixel); + if (!rc || rc == 4) { + rc = -EINVAL; + dev_err(info->device, "mode %s not found\n", mode_option); + fb_destroy_modedb(info->monspecs.modedb); + info->monspecs.modedb = NULL; + goto err_find_mode; + } + } + + fb_destroy_modedb(info->monspecs.modedb); + info->monspecs.modedb = NULL; + + /* maximize virtual vertical size for fast scrolling */ + info->var.yres_virtual = info->fix.smem_len * 8 / + (info->var.bits_per_pixel * info->var.xres_virtual); + if (info->var.yres_virtual < info->var.yres) { + dev_err(info->device, "virtual vertical size smaller than real\n"); goto err_find_mode; } @@ -1164,6 +1347,12 @@ err_reg_fb: fb_dealloc_cmap(&info->cmap); err_alloc_cmap: err_find_mode: +#ifdef CONFIG_FB_S3_DDC + if (par->ddc_registered) + i2c_del_adapter(&par->ddc_adapter); + if (par->mmio) + iounmap(par->mmio); +#endif pci_iounmap(dev, info->screen_base); err_iomap: pci_release_regions(dev); @@ -1195,6 +1384,13 @@ static void __devexit s3_pci_remove(struct pci_dev *dev) unregister_framebuffer(info); fb_dealloc_cmap(&info->cmap); +#ifdef CONFIG_FB_S3_DDC + if (par->ddc_registered) + i2c_del_adapter(&par->ddc_adapter); + if (par->mmio) + iounmap(par->mmio); +#endif + pci_iounmap(dev, info->screen_base); pci_release_regions(dev); /* pci_disable_device(dev); */ |