drivers/media/pci/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 #include <asm/io.h>
  28
  29 #include <media/dmxdev.h>
  30 #include <media/dvbdev.h>
  31 #include <media/dvb_demux.h>
  32 #include <media/dvb_frontend.h>
  33 #include <media/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 }
  76 EXPORT_SYMBOL_GPL(mantis_get_mac);
  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);
  91         mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);
  92         mmwrite(0x00, MANTIS_GPIF_DOUT);
  93 }
  94 EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
  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 }
 124 EXPORT_SYMBOL_GPL(mantis_stream_control);