drivers/media/pci/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 #include <asm/io.h>
  27
  28 #include <media/dmxdev.h>
  29 #include <media/dvbdev.h>
  30 #include <media/dvb_demux.h>
  31 #include <media/dvb_frontend.h>
  32 #include <media/dvb_net.h>
  33
  34 #include "mantis_common.h"
  35 #include "mantis_link.h" /* temporary due to physical layer stuff */
  36 #include "mantis_reg.h"
  37
  38 /*
  39  * If Slot state is already PLUG_IN event and we are called
  40  * again, definitely it is jitter alone
  41  */
  42 void mantis_event_cam_plugin(struct mantis_ca *ca)
  43 {
  44         struct mantis_pci *mantis = ca->ca_priv;
  45
  46         u32 gpif_irqcfg;
  47
  48         if (ca->slot_state == MODULE_XTRACTED) {
  49                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
  50                 udelay(50);
  51                 mmwrite(0xda000000, MANTIS_CARD_RESET);
  52                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  53                 gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
  54                 gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
  55                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  56                 udelay(500);
  57                 ca->slot_state = MODULE_INSERTED;
  58         }
  59         udelay(100);
  60 }
  61
  62 /*
  63  * If Slot state is already UN_PLUG event and we are called
  64  * again, definitely it is jitter alone
  65  */
  66 void mantis_event_cam_unplug(struct mantis_ca *ca)
  67 {
  68         struct mantis_pci *mantis = ca->ca_priv;
  69
  70         u32 gpif_irqcfg;
  71
  72         if (ca->slot_state == MODULE_INSERTED) {
  73                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
  74                 udelay(50);
  75                 mmwrite(0x00da0000, MANTIS_CARD_RESET);
  76                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  77                 gpif_irqcfg |= MANTIS_MASK_PLUGIN;
  78                 gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
  79                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  80                 udelay(500);
  81                 ca->slot_state = MODULE_XTRACTED;
  82         }
  83         udelay(100);
  84 }
  85
  86 int mantis_pcmcia_init(struct mantis_ca *ca)
  87 {
  88         struct mantis_pci *mantis = ca->ca_priv;
  89
  90         u32 gpif_stat, card_stat;
  91
  92         mantis_unmask_ints(mantis, MANTIS_INT_IRQ0);
  93         gpif_stat = mmread(MANTIS_GPIF_STATUS);
  94         card_stat = mmread(MANTIS_GPIF_IRQCFG);
  95
  96         if (gpif_stat & MANTIS_GPIF_DETSTAT) {
  97                 dprintk(MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
  98                 mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
  99                 ca->slot_state = MODULE_INSERTED;
 100                 dvb_ca_en50221_camchange_irq(&ca->en50221,
 101                                              0,
 102                                              DVB_CA_EN50221_CAMCHANGE_INSERTED);
 103         } else {
 104                 dprintk(MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
 105                 mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
 106                 ca->slot_state = MODULE_XTRACTED;
 107                 dvb_ca_en50221_camchange_irq(&ca->en50221,
 108                                              0,
 109                                              DVB_CA_EN50221_CAMCHANGE_REMOVED);
 110         }
 111
 112         return 0;
 113 }
 114
 115 void mantis_pcmcia_exit(struct mantis_ca *ca)
 116 {
 117         struct mantis_pci *mantis = ca->ca_priv;
 118
 119         mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
 120         mantis_mask_ints(mantis, MANTIS_INT_IRQ0);
 121 }