release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/dvb/mantis/mantis_pcmcia.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
  23 #include <linux/signal.h>
  24 #include <linux/sched.h>
  25 #include <linux/interrupt.h>
  26
  27 #include "dmxdev.h"
  28 #include "dvbdev.h"
  29 #include "dvb_demux.h"
  30 #include "dvb_frontend.h"
  31 #include "dvb_net.h"
  32
  33 #include "mantis_common.h"
  34 #include "mantis_link.h" /* temporary due to physical layer stuff */
  35 #include "mantis_reg.h"
  36
  37 /*
  38  * If Slot state is already PLUG_IN event and we are called
  39  * again, definitely it is jitter alone
  40  */
  41 void mantis_event_cam_plugin(struct mantis_ca *ca)
  42 {
  43         struct mantis_pci *mantis = ca->ca_priv;
  44
  45         u32 gpif_irqcfg;
  46
  47         if (ca->slot_state == MODULE_XTRACTED) {
  48                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
  49                 udelay(50);
  50                 mmwrite(0xda000000, MANTIS_CARD_RESET);
  51                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  52                 gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
  53                 gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
  54                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  55                 udelay(500);
  56                 ca->slot_state = MODULE_INSERTED;
  57         }
  58         udelay(100);
  59 }
  60
  61 /*
  62  * If Slot state is already UN_PLUG event and we are called
  63  * again, definitely it is jitter alone
  64  */
  65 void mantis_event_cam_unplug(struct mantis_ca *ca)
  66 {
  67         struct mantis_pci *mantis = ca->ca_priv;
  68
  69         u32 gpif_irqcfg;
  70
  71         if (ca->slot_state == MODULE_INSERTED) {
  72                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
  73                 udelay(50);
  74                 mmwrite(0x00da0000, MANTIS_CARD_RESET);
  75                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  76                 gpif_irqcfg |= MANTIS_MASK_PLUGIN;
  77                 gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
  78                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  79                 udelay(500);
  80                 ca->slot_state = MODULE_XTRACTED;
  81         }
  82         udelay(100);
  83 }
  84
  85 int mantis_pcmcia_init(struct mantis_ca *ca)
  86 {
  87         struct mantis_pci *mantis = ca->ca_priv;
  88
  89         u32 gpif_stat, card_stat;
  90
  91         mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_IRQ0, MANTIS_INT_MASK);
  92         gpif_stat = mmread(MANTIS_GPIF_STATUS);
  93         card_stat = mmread(MANTIS_GPIF_IRQCFG);
  94
  95         if (gpif_stat & MANTIS_GPIF_DETSTAT) {
  96                 dprintk(MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
  97                 mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
  98                 ca->slot_state = MODULE_INSERTED;
  99                 dvb_ca_en50221_camchange_irq(&ca->en50221,
 100                                              0,
 101                                              DVB_CA_EN50221_CAMCHANGE_INSERTED);
 102         } else {
 103                 dprintk(MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
 104                 mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
 105                 ca->slot_state = MODULE_XTRACTED;
 106                 dvb_ca_en50221_camchange_irq(&ca->en50221,
 107                                              0,
 108                                              DVB_CA_EN50221_CAMCHANGE_REMOVED);
 109         }
 110
 111         return 0;
 112 }
 113
 114 void mantis_pcmcia_exit(struct mantis_ca *ca)
 115 {
 116         struct mantis_pci *mantis = ca->ca_priv;
 117
 118         mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
 119         mmwrite(mmread(MANTIS_INT_MASK) & ~MANTIS_INT_IRQ0, MANTIS_INT_MASK);
 120 }