LXR linux/include/linux/via-core.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
   4 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   5 * Copyright 2009-2010 Jonathan Corbet <corbet@lwn.net>
   6 * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
   7 */
   8
   9#ifndef __VIA_CORE_H__
  10#define __VIA_CORE_H__
  11#include <linux/types.h>
  12#include <linux/io.h>
  13#include <linux/spinlock.h>
  14#include <linux/pci.h>
  15
  16/*
  17 * A description of each known serial I2C/GPIO port.
  18 */
  19enum via_port_type {
  20        VIA_PORT_NONE = 0,
  21        VIA_PORT_I2C,
  22        VIA_PORT_GPIO,
  23};
  24
  25enum via_port_mode {
  26        VIA_MODE_OFF = 0,
  27        VIA_MODE_I2C,           /* Used as I2C port */
  28        VIA_MODE_GPIO,  /* Two GPIO ports */
  29};
  30
  31enum viafb_i2c_adap {
  32        VIA_PORT_26 = 0,
  33        VIA_PORT_31,
  34        VIA_PORT_25,
  35        VIA_PORT_2C,
  36        VIA_PORT_3D,
  37};
  38#define VIAFB_NUM_PORTS 5
  39
  40struct via_port_cfg {
  41        enum via_port_type      type;
  42        enum via_port_mode      mode;
  43        u16                     io_port;
  44        u8                      ioport_index;
  45};
  46
  47/*
  48 * Allow subdevs to register suspend/resume hooks.
  49 */
  50struct viafb_pm_hooks {
  51        struct list_head list;
  52        int (*suspend)(void *private);
  53        int (*resume)(void *private);
  54        void *private;
  55};
  56
  57void viafb_pm_register(struct viafb_pm_hooks *hooks);
  58void viafb_pm_unregister(struct viafb_pm_hooks *hooks);
  59
  60/*
  61 * This is the global viafb "device" containing stuff needed by
  62 * all subdevs.
  63 */
  64struct viafb_dev {
  65        struct pci_dev *pdev;
  66        int chip_type;
  67        struct via_port_cfg *port_cfg;
  68        /*
  69         * Spinlock for access to device registers.  Not yet
  70         * globally used.
  71         */
  72        spinlock_t reg_lock;
  73        /*
  74         * The framebuffer MMIO region.  Little, if anything, touches
  75         * this memory directly, and certainly nothing outside of the
  76         * framebuffer device itself.  We *do* have to be able to allocate
  77         * chunks of this memory for other devices, though.
  78         */
  79        unsigned long fbmem_start;
  80        long fbmem_len;
  81        void __iomem *fbmem;
  82#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
  83        long camera_fbmem_offset;
  84        long camera_fbmem_size;
  85#endif
  86        /*
  87         * The MMIO region for device registers.
  88         */
  89        unsigned long engine_start;
  90        unsigned long engine_len;
  91        void __iomem *engine_mmio;
  92
  93};
  94
  95/*
  96 * Interrupt management.
  97 */
  98
  99void viafb_irq_enable(u32 mask);
 100void viafb_irq_disable(u32 mask);
 101
 102/*
 103 * The global interrupt control register and its bits.
 104 */
 105#define VDE_INTERRUPT   0x200   /* Video interrupt flags/masks */
 106#define   VDE_I_DVISENSE  0x00000001  /* DVI sense int status */
 107#define   VDE_I_VBLANK    0x00000002  /* Vertical blank status */
 108#define   VDE_I_MCCFI     0x00000004  /* MCE compl. frame int status */
 109#define   VDE_I_VSYNC     0x00000008  /* VGA VSYNC int status */
 110#define   VDE_I_DMA0DDONE 0x00000010  /* DMA 0 descr done */
 111#define   VDE_I_DMA0TDONE 0x00000020  /* DMA 0 transfer done */
 112#define   VDE_I_DMA1DDONE 0x00000040  /* DMA 1 descr done */
 113#define   VDE_I_DMA1TDONE 0x00000080  /* DMA 1 transfer done */
 114#define   VDE_I_C1AV      0x00000100  /* Cap Eng 1 act vid end */
 115#define   VDE_I_HQV0      0x00000200  /* First HQV engine */
 116#define   VDE_I_HQV1      0x00000400  /* Second HQV engine */
 117#define   VDE_I_HQV1EN    0x00000800  /* Second HQV engine enable */
 118#define   VDE_I_C0AV      0x00001000  /* Cap Eng 0 act vid end */
 119#define   VDE_I_C0VBI     0x00002000  /* Cap Eng 0 VBI end */
 120#define   VDE_I_C1VBI     0x00004000  /* Cap Eng 1 VBI end */
 121#define   VDE_I_VSYNC2    0x00008000  /* Sec. Disp. VSYNC */
 122#define   VDE_I_DVISNSEN  0x00010000  /* DVI sense enable */
 123#define   VDE_I_VSYNC2EN  0x00020000  /* Sec Disp VSYNC enable */
 124#define   VDE_I_MCCFIEN   0x00040000  /* MC comp frame int mask enable */
 125#define   VDE_I_VSYNCEN   0x00080000  /* VSYNC enable */
 126#define   VDE_I_DMA0DDEN  0x00100000  /* DMA 0 descr done enable */
 127#define   VDE_I_DMA0TDEN  0x00200000  /* DMA 0 trans done enable */
 128#define   VDE_I_DMA1DDEN  0x00400000  /* DMA 1 descr done enable */
 129#define   VDE_I_DMA1TDEN  0x00800000  /* DMA 1 trans done enable */
 130#define   VDE_I_C1AVEN    0x01000000  /* cap 1 act vid end enable */
 131#define   VDE_I_HQV0EN    0x02000000  /* First hqv engine enable */
 132#define   VDE_I_C1VBIEN   0x04000000  /* Cap 1 VBI end enable */
 133#define   VDE_I_LVDSSI    0x08000000  /* LVDS sense interrupt */
 134#define   VDE_I_C0AVEN    0x10000000  /* Cap 0 act vid end enable */
 135#define   VDE_I_C0VBIEN   0x20000000  /* Cap 0 VBI end enable */
 136#define   VDE_I_LVDSSIEN  0x40000000  /* LVDS Sense enable */
 137#define   VDE_I_ENABLE    0x80000000  /* Global interrupt enable */
 138
 139#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
 140/*
 141 * DMA management.
 142 */
 143int viafb_request_dma(void);
 144void viafb_release_dma(void);
 145/* void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len); */
 146int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg);
 147
 148/*
 149 * DMA Controller registers.
 150 */
 151#define VDMA_MR0        0xe00           /* Mod reg 0 */
 152#define   VDMA_MR_CHAIN   0x01          /* Chaining mode */
 153#define   VDMA_MR_TDIE    0x02          /* Transfer done int enable */
 154#define VDMA_CSR0       0xe04           /* Control/status */
 155#define   VDMA_C_ENABLE   0x01            /* DMA Enable */
 156#define   VDMA_C_START    0x02            /* Start a transfer */
 157#define   VDMA_C_ABORT    0x04            /* Abort a transfer */
 158#define   VDMA_C_DONE     0x08            /* Transfer is done */
 159#define VDMA_MARL0      0xe20           /* Mem addr low */
 160#define VDMA_MARH0      0xe24           /* Mem addr high */
 161#define VDMA_DAR0       0xe28           /* Device address */
 162#define VDMA_DQWCR0     0xe2c           /* Count (16-byte) */
 163#define VDMA_TMR0       0xe30           /* Tile mode reg */
 164#define VDMA_DPRL0      0xe34           /* Not sure */
 165#define   VDMA_DPR_IN     0x08          /* Inbound transfer to FB */
 166#define VDMA_DPRH0      0xe38
 167#define VDMA_PMR0       (0xe00 + 0x134) /* Pitch mode */
 168
 169/*
 170 * Useful stuff that probably belongs somewhere global.
 171 */
 172#define VGA_WIDTH       640
 173#define VGA_HEIGHT      480
 174#endif /* CONFIG_VIDEO_VIA_CAMERA */
 175
 176/*
 177 * Indexed port operations.  Note that these are all multi-op
 178 * functions; every invocation will be racy if you're not holding
 179 * reg_lock.
 180 */
 181
 182#define VIAStatus   0x3DA  /* Non-indexed port */
 183#define VIACR       0x3D4
 184#define VIASR       0x3C4
 185#define VIAGR       0x3CE
 186#define VIAAR       0x3C0
 187
 188static inline u8 via_read_reg(u16 port, u8 index)
 189{
 190        outb(index, port);
 191        return inb(port + 1);
 192}
 193
 194static inline void via_write_reg(u16 port, u8 index, u8 data)
 195{
 196        outb(index, port);
 197        outb(data, port + 1);
 198}
 199
 200static inline void via_write_reg_mask(u16 port, u8 index, u8 data, u8 mask)
 201{
 202        u8 old;
 203
 204        outb(index, port);
 205        old = inb(port + 1);
 206        outb((data & mask) | (old & ~mask), port + 1);
 207}
 208
 209#define VIA_MISC_REG_READ       0x03CC
 210#define VIA_MISC_REG_WRITE      0x03C2
 211
 212static inline void via_write_misc_reg_mask(u8 data, u8 mask)
 213{
 214        u8 old = inb(VIA_MISC_REG_READ);
 215        outb((data & mask) | (old & ~mask), VIA_MISC_REG_WRITE);
 216}
 217
 218
 219#endif /* __VIA_CORE_H__ */
 220