xref: /openbmc/linux/include/linux/via-core.h (revision ab5fe88a)
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  */
19 enum via_port_type {
20 	VIA_PORT_NONE = 0,
21 	VIA_PORT_I2C,
22 	VIA_PORT_GPIO,
23 };
24 
25 enum 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 
31 enum 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 
40 struct 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  */
50 struct viafb_pm_hooks {
51 	struct list_head list;
52 	int (*suspend)(void *private);
53 	int (*resume)(void *private);
54 	void *private;
55 };
56 
57 void viafb_pm_register(struct viafb_pm_hooks *hooks);
58 void 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  */
64 struct 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 
99 void viafb_irq_enable(u32 mask);
100 void 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  */
143 int viafb_request_dma(void);
144 void viafb_release_dma(void);
145 /* void viafb_dma_copy_out(unsigned int offset, dma_addr_t paddr, int len); */
146 int 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 
via_read_reg(u16 port,u8 index)188 static inline u8 via_read_reg(u16 port, u8 index)
189 {
190 	outb(index, port);
191 	return inb(port + 1);
192 }
193 
via_write_reg(u16 port,u8 index,u8 data)194 static inline void via_write_reg(u16 port, u8 index, u8 data)
195 {
196 	outb(index, port);
197 	outb(data, port + 1);
198 }
199 
via_write_reg_mask(u16 port,u8 index,u8 data,u8 mask)200 static 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 
via_write_misc_reg_mask(u8 data,u8 mask)212 static 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