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mantis_ioc.c
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1 /*
2  Mantis PCI bridge driver
3 
4  Copyright (C) Manu Abraham ([email protected])
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2 of the License, or
9  (at your option) any later version.
10 
11  This program is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU General Public License for more details.
15 
16  You should have received a copy of the GNU General Public License
17  along with this program; if not, write to the Free Software
18  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 
21 #include <linux/kernel.h>
22 #include <linux/i2c.h>
23 
24 #include <linux/signal.h>
25 #include <linux/sched.h>
26 #include <linux/interrupt.h>
27 #include <asm/io.h>
28 
29 #include "dmxdev.h"
30 #include "dvbdev.h"
31 #include "dvb_demux.h"
32 #include "dvb_frontend.h"
33 #include "dvb_net.h"
34 
35 #include "mantis_common.h"
36 #include "mantis_reg.h"
37 #include "mantis_ioc.h"
38 
39 static int read_eeprom_bytes(struct mantis_pci *mantis, u8 reg, u8 *data, u8 length)
40 {
41  struct i2c_adapter *adapter = &mantis->adapter;
42  int err;
43  u8 buf = reg;
44 
45  struct i2c_msg msg[] = {
46  { .addr = 0x50, .flags = 0, .buf = &buf, .len = 1 },
47  { .addr = 0x50, .flags = I2C_M_RD, .buf = data, .len = length },
48  };
49 
50  err = i2c_transfer(adapter, msg, 2);
51  if (err < 0) {
52  dprintk(MANTIS_ERROR, 1, "ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",
53  err, data[0], data[1]);
54 
55  return err;
56  }
57 
58  return 0;
59 }
60 int mantis_get_mac(struct mantis_pci *mantis)
61 {
62  int err;
63  u8 mac_addr[6] = {0};
64 
65  err = read_eeprom_bytes(mantis, 0x08, mac_addr, 6);
66  if (err < 0) {
67  dprintk(MANTIS_ERROR, 1, "ERROR: Mantis EEPROM read error <%d>", err);
68 
69  return err;
70  }
71 
72  dprintk(MANTIS_ERROR, 0, " MAC Address=[%pM]\n", mac_addr);
73 
74  return 0;
75 }
77 
78 /* Turn the given bit on or off. */
79 void mantis_gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)
80 {
81  u32 cur;
82 
83  dprintk(MANTIS_DEBUG, 1, "Set Bit <%d> to <%d>", bitpos, value);
84  cur = mmread(MANTIS_GPIF_ADDR);
85  if (value)
86  mantis->gpio_status = cur | (1 << bitpos);
87  else
88  mantis->gpio_status = cur & (~(1 << bitpos));
89 
90  dprintk(MANTIS_DEBUG, 1, "GPIO Value <%02x>", mantis->gpio_status);
93 }
95 
96 int mantis_stream_control(struct mantis_pci *mantis, enum mantis_stream_control stream_ctl)
97 {
98  u32 reg;
99 
100  reg = mmread(MANTIS_CONTROL);
101  switch (stream_ctl) {
102  case STREAM_TO_HIF:
103  dprintk(MANTIS_DEBUG, 1, "Set stream to HIF");
104  reg &= 0xff - MANTIS_BYPASS;
105  mmwrite(reg, MANTIS_CONTROL);
106  reg |= MANTIS_BYPASS;
107  mmwrite(reg, MANTIS_CONTROL);
108  break;
109 
110  case STREAM_TO_CAM:
111  dprintk(MANTIS_DEBUG, 1, "Set stream to CAM");
112  reg |= MANTIS_BYPASS;
113  mmwrite(reg, MANTIS_CONTROL);
114  reg &= 0xff - MANTIS_BYPASS;
115  mmwrite(reg, MANTIS_CONTROL);
116  break;
117  default:
118  dprintk(MANTIS_ERROR, 1, "Unknown MODE <%02x>", stream_ctl);
119  return -1;
120  }
121 
122  return 0;
123 }