drivers/media/pci/mantis/mantis_pcmcia.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3         Mantis PCI bridge driver
   4
   5         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   6
   7 */
   8
   9 #include <linux/kernel.h>
  10
  11 #include <linux/signal.h>
  12 #include <linux/sched.h>
  13 #include <linux/interrupt.h>
  14 #include <asm/io.h>
  15
  16 #include <media/dmxdev.h>
  17 #include <media/dvbdev.h>
  18 #include <media/dvb_demux.h>
  19 #include <media/dvb_frontend.h>
  20 #include <media/dvb_net.h>
  21
  22 #include "mantis_common.h"
  23 #include "mantis_link.h" /* temporary due to physical layer stuff */
  24 #include "mantis_reg.h"
  25
  26 /*
  27  * If Slot state is already PLUG_IN event and we are called
  28  * again, definitely it is jitter alone
  29  */
  30 void mantis_event_cam_plugin(struct mantis_ca *ca)
  31 {
  32         struct mantis_pci *mantis = ca->ca_priv;
  33
  34         u32 gpif_irqcfg;
  35
  36         if (ca->slot_state == MODULE_XTRACTED) {
  37                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
  38                 udelay(50);
  39                 mmwrite(0xda000000, MANTIS_CARD_RESET);
  40                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  41                 gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
  42                 gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
  43                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  44                 udelay(500);
  45                 ca->slot_state = MODULE_INSERTED;
  46         }
  47         udelay(100);
  48 }
  49
  50 /*
  51  * If Slot state is already UN_PLUG event and we are called
  52  * again, definitely it is jitter alone
  53  */
  54 void mantis_event_cam_unplug(struct mantis_ca *ca)
  55 {
  56         struct mantis_pci *mantis = ca->ca_priv;
  57
  58         u32 gpif_irqcfg;
  59
  60         if (ca->slot_state == MODULE_INSERTED) {
  61                 dprintk(MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
  62                 udelay(50);
  63                 mmwrite(0x00da0000, MANTIS_CARD_RESET);
  64                 gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
  65                 gpif_irqcfg |= MANTIS_MASK_PLUGIN;
  66                 gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
  67                 mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
  68                 udelay(500);
  69                 ca->slot_state = MODULE_XTRACTED;
  70         }
  71         udelay(100);
  72 }
  73
  74 int mantis_pcmcia_init(struct mantis_ca *ca)
  75 {
  76         struct mantis_pci *mantis = ca->ca_priv;
  77
  78         u32 gpif_stat, card_stat;
  79
  80         mantis_unmask_ints(mantis, MANTIS_INT_IRQ0);
  81         gpif_stat = mmread(MANTIS_GPIF_STATUS);
  82         card_stat = mmread(MANTIS_GPIF_IRQCFG);
  83
  84         if (gpif_stat & MANTIS_GPIF_DETSTAT) {
  85                 dprintk(MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
  86                 mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
  87                 ca->slot_state = MODULE_INSERTED;
  88                 dvb_ca_en50221_camchange_irq(&ca->en50221,
  89                                              0,
  90                                              DVB_CA_EN50221_CAMCHANGE_INSERTED);
  91         } else {
  92                 dprintk(MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
  93                 mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
  94                 ca->slot_state = MODULE_XTRACTED;
  95                 dvb_ca_en50221_camchange_irq(&ca->en50221,
  96                                              0,
  97                                              DVB_CA_EN50221_CAMCHANGE_REMOVED);
  98         }
  99
 100         return 0;
 101 }
 102
 103 void mantis_pcmcia_exit(struct mantis_ca *ca)
 104 {
 105         struct mantis_pci *mantis = ca->ca_priv;
 106
 107         mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
 108         mantis_mask_ints(mantis, MANTIS_INT_IRQ0);
 109 }