drivers/media/dvb/mantis/mantis_ioc.c

   1 /*
   2         Mantis PCI bridge driver
   3
   4         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   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
  28 #include "dmxdev.h"
  29 #include "dvbdev.h"
  30 #include "dvb_demux.h"
  31 #include "dvb_frontend.h"
  32 #include "dvb_net.h"
  33
  34 #include "mantis_common.h"
  35 #include "mantis_reg.h"
  36 #include "mantis_ioc.h"
  37
  38 static int read_eeprom_bytes(struct mantis_pci *mantis, u8 reg, u8 *data, u8 length)
  39 {
  40         struct i2c_adapter *adapter = &mantis->adapter;
  41         int err;
  42         u8 buf = reg;
  43
  44         struct i2c_msg msg[] = {
  45                 { .addr = 0x50, .flags = 0, .buf = &buf, .len = 1 },
  46                 { .addr = 0x50, .flags = I2C_M_RD, .buf = data, .len = length },
  47         };
  48
  49         err = i2c_transfer(adapter, msg, 2);
  50         if (err < 0) {
  51                 dprintk(MANTIS_ERROR, 1, "ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",
  52                         err, data[0], data[1]);
  53
  54                 return err;
  55         }
  56
  57         return 0;
  58 }
  59 int mantis_get_mac(struct mantis_pci *mantis)
  60 {
  61         int err;
  62         u8 mac_addr[6] = {0};
  63
  64         err = read_eeprom_bytes(mantis, 0x08, mac_addr, 6);
  65         if (err < 0) {
  66                 dprintk(MANTIS_ERROR, 1, "ERROR: Mantis EEPROM read error <%d>", err);
  67
  68                 return err;
  69         }
  70
  71         dprintk(MANTIS_ERROR, 0, "    MAC Address=[%pM]\n", mac_addr);
  72
  73         return 0;
  74 }
  75 EXPORT_SYMBOL_GPL(mantis_get_mac);
  76
  77 /* Turn the given bit on or off. */
  78 void mantis_gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)
  79 {
  80         u32 cur;
  81
  82         dprintk(MANTIS_DEBUG, 1, "Set Bit <%d> to <%d>", bitpos, value);
  83         cur = mmread(MANTIS_GPIF_ADDR);
  84         if (value)
  85                 mantis->gpio_status = cur | (1 << bitpos);
  86         else
  87                 mantis->gpio_status = cur & (~(1 << bitpos));
  88
  89         dprintk(MANTIS_DEBUG, 1, "GPIO Value <%02x>", mantis->gpio_status);
  90         mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);
  91         mmwrite(0x00, MANTIS_GPIF_DOUT);
  92 }
  93 EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
  94
  95 int mantis_stream_control(struct mantis_pci *mantis, enum mantis_stream_control stream_ctl)
  96 {
  97         u32 reg;
  98
  99         reg = mmread(MANTIS_CONTROL);
 100         switch (stream_ctl) {
 101         case STREAM_TO_HIF:
 102                 dprintk(MANTIS_DEBUG, 1, "Set stream to HIF");
 103                 reg &= 0xff - MANTIS_BYPASS;
 104                 mmwrite(reg, MANTIS_CONTROL);
 105                 reg |= MANTIS_BYPASS;
 106                 mmwrite(reg, MANTIS_CONTROL);
 107                 break;
 108
 109         case STREAM_TO_CAM:
 110                 dprintk(MANTIS_DEBUG, 1, "Set stream to CAM");
 111                 reg |= MANTIS_BYPASS;
 112                 mmwrite(reg, MANTIS_CONTROL);
 113                 reg &= 0xff - MANTIS_BYPASS;
 114                 mmwrite(reg, MANTIS_CONTROL);
 115                 break;
 116         default:
 117                 dprintk(MANTIS_ERROR, 1, "Unknown MODE <%02x>", stream_ctl);
 118                 return -1;
 119         }
 120
 121         return 0;
 122 }
 123 EXPORT_SYMBOL_GPL(mantis_stream_control);