1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * netup-init.c
4 *
5 * NetUP Dual DVB-S2 CI driver
6 *
7 * Copyright (C) 2009 NetUP Inc.
8 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
9 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
10 */
11
12#include "cx23885.h"
13#include "netup-init.h"
14
15static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)
16{
17 int ret;
18 u8 buf[3];
19 struct i2c_msg msg = {
20 .addr = 0x88 >> 1,
21 .flags = 0,
22 .buf = buf,
23 .len = 3
24 };
25
26 buf[0] = reg >> 8;
27 buf[1] = reg & 0xff;
28 buf[2] = val;
29
30 ret = i2c_transfer(adap: i2c, msgs: &msg, num: 1);
31
32 if (ret != 1)
33 pr_err("%s: i2c write error!\n", __func__);
34}
35
36static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)
37{
38 int ret;
39 u8 buf[6];
40 struct i2c_msg msg = {
41 .addr = 0x88 >> 1,
42 .flags = 0,
43 .buf = buf,
44 .len = 6
45 };
46
47 buf[0] = reg >> 8;
48 buf[1] = reg & 0xff;
49 buf[2] = val & 0xff;
50 buf[3] = (val >> 8) & 0xff;
51 buf[4] = (val >> 16) & 0xff;
52 buf[5] = val >> 24;
53
54 ret = i2c_transfer(adap: i2c, msgs: &msg, num: 1);
55
56 if (ret != 1)
57 pr_err("%s: i2c write error!\n", __func__);
58}
59
60static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)
61{
62 int ret;
63 u8 buf[2];
64 struct i2c_msg msg = {
65 .addr = 0x88 >> 1,
66 .flags = 0,
67 .buf = buf,
68 .len = 2
69 };
70
71 buf[0] = reg >> 8;
72 buf[1] = reg & 0xff;
73
74 ret = i2c_transfer(adap: i2c, msgs: &msg, num: 1);
75
76 if (ret != 1)
77 pr_err("%s: i2c write error!\n", __func__);
78
79 msg.flags = I2C_M_RD;
80 msg.len = 1;
81
82 ret = i2c_transfer(adap: i2c, msgs: &msg, num: 1);
83
84 if (ret != 1)
85 pr_err("%s: i2c read error!\n", __func__);
86
87 return buf[0];
88}
89
90static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,
91 u8 or_value)
92{
93 i2c_av_write(i2c, reg, val: (i2c_av_read(i2c, reg) & and_mask) | or_value);
94}
95/* set 27MHz on AUX_CLK */
96void netup_initialize(struct cx23885_dev *dev)
97{
98 struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];
99 struct i2c_adapter *i2c = &i2c_bus->i2c_adap;
100
101 /* Stop microcontroller */
102 i2c_av_and_or(i2c, reg: 0x803, and_mask: ~0x10, or_value: 0x00);
103
104 /* Aux PLL frac for 27 MHz */
105 i2c_av_write4(i2c, reg: 0x114, val: 0xea0eb3);
106
107 /* Aux PLL int for 27 MHz */
108 i2c_av_write4(i2c, reg: 0x110, val: 0x090319);
109
110 /* start microcontroller */
111 i2c_av_and_or(i2c, reg: 0x803, and_mask: ~0x10, or_value: 0x10);
112}
113

source code of linux/drivers/media/pci/cx23885/netup-init.c