1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * cx18 driver PCI memory mapped IO access routines
4 *
5 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
6 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
7 */
8
9#include "cx18-driver.h"
10#include "cx18-io.h"
11#include "cx18-irq.h"
12
13void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count)
14{
15 u8 __iomem *dst = addr;
16 u16 val2 = val | (val << 8);
17 u32 val4 = val2 | (val2 << 16);
18
19 /* Align writes on the CX23418's addresses */
20 if ((count > 0) && ((unsigned long)dst & 1)) {
21 cx18_writeb(cx, val: (u8) val, addr: dst);
22 count--;
23 dst++;
24 }
25 if ((count > 1) && ((unsigned long)dst & 2)) {
26 cx18_writew(cx, val: val2, addr: dst);
27 count -= 2;
28 dst += 2;
29 }
30 while (count > 3) {
31 cx18_writel(cx, val: val4, addr: dst);
32 count -= 4;
33 dst += 4;
34 }
35 if (count > 1) {
36 cx18_writew(cx, val: val2, addr: dst);
37 count -= 2;
38 dst += 2;
39 }
40 if (count > 0)
41 cx18_writeb(cx, val: (u8) val, addr: dst);
42}
43
44void cx18_sw1_irq_enable(struct cx18 *cx, u32 val)
45{
46 cx18_write_reg_expect(cx, val, SW1_INT_STATUS, eval: ~val, mask: val);
47 cx->sw1_irq_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI) | val;
48 cx18_write_reg(cx, val: cx->sw1_irq_mask, SW1_INT_ENABLE_PCI);
49}
50
51void cx18_sw1_irq_disable(struct cx18 *cx, u32 val)
52{
53 cx->sw1_irq_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI) & ~val;
54 cx18_write_reg(cx, val: cx->sw1_irq_mask, SW1_INT_ENABLE_PCI);
55}
56
57void cx18_sw2_irq_enable(struct cx18 *cx, u32 val)
58{
59 cx18_write_reg_expect(cx, val, SW2_INT_STATUS, eval: ~val, mask: val);
60 cx->sw2_irq_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) | val;
61 cx18_write_reg(cx, val: cx->sw2_irq_mask, SW2_INT_ENABLE_PCI);
62}
63
64void cx18_sw2_irq_disable(struct cx18 *cx, u32 val)
65{
66 cx->sw2_irq_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI) & ~val;
67 cx18_write_reg(cx, val: cx->sw2_irq_mask, SW2_INT_ENABLE_PCI);
68}
69
70void cx18_sw2_irq_disable_cpu(struct cx18 *cx, u32 val)
71{
72 u32 r;
73 r = cx18_read_reg(cx, SW2_INT_ENABLE_CPU);
74 cx18_write_reg(cx, val: r & ~val, SW2_INT_ENABLE_CPU);
75}
76
77void cx18_setup_page(struct cx18 *cx, u32 addr)
78{
79 u32 val;
80 val = cx18_read_reg(cx, reg: 0xD000F8);
81 val = (val & ~0x1f00) | ((addr >> 17) & 0x1f00);
82 cx18_write_reg(cx, val, reg: 0xD000F8);
83}
84

source code of linux/drivers/media/pci/cx18/cx18-io.c