1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3	Mantis PCI bridge driver
4
5	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
6
7*/
8
9#include <linux/kernel.h>
10#include <linux/i2c.h>
11
12#include <linux/signal.h>
13#include <linux/sched.h>
14#include <linux/interrupt.h>
15#include <asm/io.h>
16
17#include <media/dmxdev.h>
18#include <media/dvbdev.h>
19#include <media/dvb_demux.h>
20#include <media/dvb_frontend.h>
21#include <media/dvb_net.h>
22
23#include "mantis_common.h"
24#include "mantis_reg.h"
25#include "mantis_ioc.h"
26
27static int read_eeprom_bytes(struct mantis_pci *mantis, u8 reg, u8 *data, u8 length)
28{
29	struct i2c_adapter *adapter = &mantis->adapter;
30	int err;
31	u8 buf = reg;
32
33	struct i2c_msg msg[] = {
34		{ .addr = 0x50, .flags = 0, .buf = &buf, .len = 1 },
35		{ .addr = 0x50, .flags = I2C_M_RD, .buf = data, .len = length },
36	};
37
38	err = i2c_transfer(adapter, msg, 2);
39	if (err < 0) {
40		dprintk(MANTIS_ERROR, 1, "ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",
41			err, data[0], data[1]);
42
43		return err;
44	}
45
46	return 0;
47}
48int mantis_get_mac(struct mantis_pci *mantis)
49{
50	int err;
51	u8 mac_addr[6] = {0};
52
53	err = read_eeprom_bytes(mantis, 0x08, mac_addr, 6);
54	if (err < 0) {
55		dprintk(MANTIS_ERROR, 1, "ERROR: Mantis EEPROM read error <%d>", err);
56
57		return err;
58	}
59
60	dprintk(MANTIS_ERROR, 0, "    MAC Address=[%pM]\n", mac_addr);
61
62	return 0;
63}
64EXPORT_SYMBOL_GPL(mantis_get_mac);
65
66/* Turn the given bit on or off. */
67void mantis_gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)
68{
69	u32 cur;
70
71	dprintk(MANTIS_DEBUG, 1, "Set Bit <%d> to <%d>", bitpos, value);
72	cur = mmread(MANTIS_GPIF_ADDR);
73	if (value)
74		mantis->gpio_status = cur | (1 << bitpos);
75	else
76		mantis->gpio_status = cur & (~(1 << bitpos));
77
78	dprintk(MANTIS_DEBUG, 1, "GPIO Value <%02x>", mantis->gpio_status);
79	mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);
80	mmwrite(0x00, MANTIS_GPIF_DOUT);
81}
82EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
83
84int mantis_stream_control(struct mantis_pci *mantis, enum mantis_stream_control stream_ctl)
85{
86	u32 reg;
87
88	reg = mmread(MANTIS_CONTROL);
89	switch (stream_ctl) {
90	case STREAM_TO_HIF:
91		dprintk(MANTIS_DEBUG, 1, "Set stream to HIF");
92		reg &= 0xff - MANTIS_BYPASS;
93		mmwrite(reg, MANTIS_CONTROL);
94		reg |= MANTIS_BYPASS;
95		mmwrite(reg, MANTIS_CONTROL);
96		break;
97
98	case STREAM_TO_CAM:
99		dprintk(MANTIS_DEBUG, 1, "Set stream to CAM");
100		reg |= MANTIS_BYPASS;
101		mmwrite(reg, MANTIS_CONTROL);
102		reg &= 0xff - MANTIS_BYPASS;
103		mmwrite(reg, MANTIS_CONTROL);
104		break;
105	default:
106		dprintk(MANTIS_ERROR, 1, "Unknown MODE <%02x>", stream_ctl);
107		return -1;
108	}
109
110	return 0;
111}
112EXPORT_SYMBOL_GPL(mantis_stream_control);
113