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| author | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2010-04-17 19:44:55 +0000 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2010-05-07 17:17:39 -0600 |
| commit | 162fc8c0c03d5b8536f14cbd2cdfb399c50c05ec (patch) | |
| tree | d62f5f29718844d37075d8f485eaeee55f46ae2a /drivers | |
| parent | 384c3041aeaf77d299b0d4a62481850fed86e53b (diff) | |
| download | kernel_samsung_espresso10-162fc8c0c03d5b8536f14cbd2cdfb399c50c05ec.zip kernel_samsung_espresso10-162fc8c0c03d5b8536f14cbd2cdfb399c50c05ec.tar.gz kernel_samsung_espresso10-162fc8c0c03d5b8536f14cbd2cdfb399c50c05ec.tar.bz2 | |
viafb: improve misc register handling
viafb: improve misc register handling
This patch improves the misc register handling by adding a modify
function for this to via_io.h and moving expanded definitions of the
relevant ports there. The code was changed to use those to improve
readability.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/via/hw.c | 27 | ||||
| -rw-r--r-- | drivers/video/via/share.h | 2 | ||||
| -rw-r--r-- | drivers/video/via/via_io.h | 9 |
3 files changed, 17 insertions, 21 deletions
diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c index b2bb24e..e356fe8 100644 --- a/drivers/video/via/hw.c +++ b/drivers/video/via/hw.c @@ -1394,8 +1394,6 @@ u32 viafb_get_clk_value(int clk) /* Set VCLK*/ void viafb_set_vclock(u32 CLK, int set_iga) { - unsigned char RegTemp; - /* H.W. Reset : ON */ viafb_write_reg_mask(CR17, VIACR, 0x00, BIT7); @@ -1468,8 +1466,7 @@ void viafb_set_vclock(u32 CLK, int set_iga) } /* Fire! */ - RegTemp = inb(VIARMisc); - outb(RegTemp | (BIT2 + BIT3), VIAWMisc); + via_write_misc_reg_mask(0x0C, 0x0C); /* select external clock */ } void viafb_load_crtc_timing(struct display_timing device_timing, @@ -1713,6 +1710,7 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table, int index = 0; int h_addr, v_addr; u32 pll_D_N; + u8 polarity = 0; for (i = 0; i < video_mode->mode_array; i++) { index = i; @@ -1741,20 +1739,11 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table, v_addr = crt_reg.ver_addr; /* update polarity for CRT timing */ - if (crt_table[index].h_sync_polarity == NEGATIVE) { - if (crt_table[index].v_sync_polarity == NEGATIVE) - outb((inb(VIARMisc) & (~(BIT6 + BIT7))) | - (BIT6 + BIT7), VIAWMisc); - else - outb((inb(VIARMisc) & (~(BIT6 + BIT7))) | (BIT6), - VIAWMisc); - } else { - if (crt_table[index].v_sync_polarity == NEGATIVE) - outb((inb(VIARMisc) & (~(BIT6 + BIT7))) | (BIT7), - VIAWMisc); - else - outb((inb(VIARMisc) & (~(BIT6 + BIT7))), VIAWMisc); - } + if (crt_table[index].h_sync_polarity == NEGATIVE) + polarity |= BIT6; + if (crt_table[index].v_sync_polarity == NEGATIVE) + polarity |= BIT7; + via_write_misc_reg_mask(polarity, BIT6 | BIT7); if (set_iga == IGA1) { viafb_unlock_crt(); @@ -2123,7 +2112,7 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp, /* Fill VPIT Parameters */ /* Write Misc Register */ - outb(VPIT.Misc, VIAWMisc); + outb(VPIT.Misc, VIA_MISC_REG_WRITE); /* Write Sequencer */ for (i = 1; i <= StdSR; i++) diff --git a/drivers/video/via/share.h b/drivers/video/via/share.h index f974c73..861b414 100644 --- a/drivers/video/via/share.h +++ b/drivers/video/via/share.h @@ -45,8 +45,6 @@ /* standard VGA IO port */ -#define VIARMisc 0x3CC -#define VIAWMisc 0x3C2 #define VIAStatus 0x3DA #define VIACR 0x3D4 #define VIASR 0x3C4 diff --git a/drivers/video/via/via_io.h b/drivers/video/via/via_io.h index e1c1093..a3d2aca 100644 --- a/drivers/video/via/via_io.h +++ b/drivers/video/via/via_io.h @@ -29,6 +29,9 @@ #include <linux/types.h> #include <linux/io.h> +#define VIA_MISC_REG_READ 0x03CC +#define VIA_MISC_REG_WRITE 0x03C2 + /* * Indexed port operations. Note that these are all multi-op * functions; every invocation will be racy if you're not holding @@ -55,4 +58,10 @@ static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask) outb((data & mask) | (old & ~mask), port + 1); } +static inline void via_write_misc_reg_mask(u8 data, u8 mask) +{ + u8 old = inb(VIA_MISC_REG_READ); + outb((data & mask) | (old & ~mask), VIA_MISC_REG_WRITE); +} + #endif /* __VIA_IO_H__ */ |