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
read_eeprom_bytes(struct mantis_pci * mantis,u8 reg,u8 * data,u8 length)27 static 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 }
mantis_get_mac(struct mantis_pci * mantis)48 int 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 }
64 EXPORT_SYMBOL_GPL(mantis_get_mac);
65
66 /* Turn the given bit on or off. */
mantis_gpio_set_bits(struct mantis_pci * mantis,u32 bitpos,u8 value)67 void 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 }
82 EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
83
mantis_stream_control(struct mantis_pci * mantis,enum mantis_stream_control stream_ctl)84 int 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 }
112 EXPORT_SYMBOL_GPL(mantis_stream_control);
113