c4f28e54d6
Some of fb drivers uses atomic_t in bad manner, since there are still some race-prone gaps. Use mutexes to protect open/close code sections with ref_count testing and finally use simple uint. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Denis Oliver Kropp <dok@directfb.org> Cc: James Simmons <jsimmons@infradead.org> 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>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
#ifndef __RIVAFB_H
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#define __RIVAFB_H
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#include <linux/fb.h>
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#include <video/vga.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/i2c-algo-bit.h>
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#include "riva_hw.h"
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/* GGI compatibility macros */
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#define NUM_SEQ_REGS 0x05
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#define NUM_CRT_REGS 0x41
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#define NUM_GRC_REGS 0x09
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#define NUM_ATC_REGS 0x15
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/* I2C */
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#define DDC_SCL_READ_MASK (1 << 2)
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#define DDC_SCL_WRITE_MASK (1 << 5)
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#define DDC_SDA_READ_MASK (1 << 3)
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#define DDC_SDA_WRITE_MASK (1 << 4)
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/* holds the state of the VGA core and extended Riva hw state from riva_hw.c.
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* From KGI originally. */
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struct riva_regs {
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u8 attr[NUM_ATC_REGS];
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u8 crtc[NUM_CRT_REGS];
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u8 gra[NUM_GRC_REGS];
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u8 seq[NUM_SEQ_REGS];
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u8 misc_output;
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RIVA_HW_STATE ext;
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};
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struct riva_par;
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struct riva_i2c_chan {
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struct riva_par *par;
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unsigned long ddc_base;
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struct i2c_adapter adapter;
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struct i2c_algo_bit_data algo;
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};
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struct riva_par {
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RIVA_HW_INST riva; /* interface to riva_hw.c */
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u32 pseudo_palette[16]; /* default palette */
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u32 palette[16]; /* for Riva128 */
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u8 __iomem *ctrl_base; /* virtual control register base addr */
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unsigned dclk_max; /* max DCLK */
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struct riva_regs initial_state; /* initial startup video mode */
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struct riva_regs current_state;
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#ifdef CONFIG_X86
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struct vgastate state;
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#endif
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struct mutex open_lock;
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unsigned int ref_count;
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unsigned char *EDID;
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unsigned int Chipset;
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int forceCRTC;
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Bool SecondCRTC;
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int FlatPanel;
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struct pci_dev *pdev;
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int bus;
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int cursor_reset;
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#ifdef CONFIG_MTRR
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struct { int vram; int vram_valid; } mtrr;
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#endif
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struct riva_i2c_chan chan[3];
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};
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void riva_common_setup(struct riva_par *);
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unsigned long riva_get_memlen(struct riva_par *);
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unsigned long riva_get_maxdclk(struct riva_par *);
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void riva_delete_i2c_busses(struct riva_par *par);
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void riva_create_i2c_busses(struct riva_par *par);
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int riva_probe_i2c_connector(struct riva_par *par, int conn, u8 **out_edid);
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#endif /* __RIVAFB_H */
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