drivers/media/dvb/mantis/mantis_ca.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/signal.h>
  22 #include <linux/slab.h>
  23 #include <linux/sched.h>
  24 #include <linux/interrupt.h>
  25
  26 #include "dmxdev.h"
  27 #include "dvbdev.h"
  28 #include "dvb_demux.h"
  29 #include "dvb_frontend.h"
  30 #include "dvb_net.h"
  31
  32 #include "mantis_common.h"
  33 #include "mantis_link.h"
  34 #include "mantis_hif.h"
  35 #include "mantis_reg.h"
  36
  37 #include "mantis_ca.h"
  38
  39 static int mantis_ca_read_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr)
  40 {
  41         struct mantis_ca *ca = en50221->data;
  42         struct mantis_pci *mantis = ca->ca_priv;
  43
  44         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Read", slot);
  45
  46         if (slot != 0)
  47                 return -EINVAL;
  48
  49         return mantis_hif_read_mem(ca, addr);
  50 }
  51
  52 static int mantis_ca_write_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr, u8 data)
  53 {
  54         struct mantis_ca *ca = en50221->data;
  55         struct mantis_pci *mantis = ca->ca_priv;
  56
  57         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Write", slot);
  58
  59         if (slot != 0)
  60                 return -EINVAL;
  61
  62         return mantis_hif_write_mem(ca, addr, data);
  63 }
  64
  65 static int mantis_ca_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
  66 {
  67         struct mantis_ca *ca = en50221->data;
  68         struct mantis_pci *mantis = ca->ca_priv;
  69
  70         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Read", slot);
  71
  72         if (slot != 0)
  73                 return -EINVAL;
  74
  75         return mantis_hif_read_iom(ca, addr);
  76 }
  77
  78 static int mantis_ca_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr, u8 data)
  79 {
  80         struct mantis_ca *ca = en50221->data;
  81         struct mantis_pci *mantis = ca->ca_priv;
  82
  83         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Write", slot);
  84
  85         if (slot != 0)
  86                 return -EINVAL;
  87
  88         return mantis_hif_write_iom(ca, addr, data);
  89 }
  90
  91 static int mantis_ca_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
  92 {
  93         struct mantis_ca *ca = en50221->data;
  94         struct mantis_pci *mantis = ca->ca_priv;
  95
  96         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot RESET", slot);
  97         udelay(500); /* Wait.. */
  98         mmwrite(0xda, MANTIS_PCMCIA_RESET); /* Leading edge assert */
  99         udelay(500);
 100         mmwrite(0x00, MANTIS_PCMCIA_RESET); /* Trailing edge deassert */
 101         msleep(1000);
 102         dvb_ca_en50221_camready_irq(&ca->en50221, 0);
 103
 104         return 0;
 105 }
 106
 107 static int mantis_ca_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 108 {
 109         struct mantis_ca *ca = en50221->data;
 110         struct mantis_pci *mantis = ca->ca_priv;
 111
 112         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot shutdown", slot);
 113
 114         return 0;
 115 }
 116
 117 static int mantis_ts_control(struct dvb_ca_en50221 *en50221, int slot)
 118 {
 119         struct mantis_ca *ca = en50221->data;
 120         struct mantis_pci *mantis = ca->ca_priv;
 121
 122         dprintk(MANTIS_DEBUG, 1, "Slot(%d): TS control", slot);
 123 /*      mantis_set_direction(mantis, 1); */ /* Enable TS through CAM */
 124
 125         return 0;
 126 }
 127
 128 static int mantis_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
 129 {
 130         struct mantis_ca *ca = en50221->data;
 131         struct mantis_pci *mantis = ca->ca_priv;
 132
 133         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Poll Slot status", slot);
 134
 135         if (ca->slot_state == MODULE_INSERTED) {
 136                 dprintk(MANTIS_DEBUG, 1, "CA Module present and ready");
 137                 return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
 138         } else {
 139                 dprintk(MANTIS_DEBUG, 1, "CA Module not present or not ready");
 140         }
 141
 142         return 0;
 143 }
 144
 145 int mantis_ca_init(struct mantis_pci *mantis)
 146 {
 147         struct dvb_adapter *dvb_adapter = &mantis->dvb_adapter;
 148         struct mantis_ca *ca;
 149         int ca_flags = 0, result;
 150
 151         dprintk(MANTIS_DEBUG, 1, "Initializing Mantis CA");
 152         ca = kzalloc(sizeof(struct mantis_ca), GFP_KERNEL);
 153         if (!ca) {
 154                 dprintk(MANTIS_ERROR, 1, "Out of memory!, exiting ..");
 155                 result = -ENOMEM;
 156                 goto err;
 157         }
 158
 159         ca->ca_priv             = mantis;
 160         mantis->mantis_ca       = ca;
 161         ca_flags                = DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE;
 162         /* register CA interface */
 163         ca->en50221.owner               = THIS_MODULE;
 164         ca->en50221.read_attribute_mem  = mantis_ca_read_attr_mem;
 165         ca->en50221.write_attribute_mem = mantis_ca_write_attr_mem;
 166         ca->en50221.read_cam_control    = mantis_ca_read_cam_ctl;
 167         ca->en50221.write_cam_control   = mantis_ca_write_cam_ctl;
 168         ca->en50221.slot_reset          = mantis_ca_slot_reset;
 169         ca->en50221.slot_shutdown       = mantis_ca_slot_shutdown;
 170         ca->en50221.slot_ts_enable      = mantis_ts_control;
 171         ca->en50221.poll_slot_status    = mantis_slot_status;
 172         ca->en50221.data                = ca;
 173
 174         mutex_init(&ca->ca_lock);
 175
 176         init_waitqueue_head(&ca->hif_data_wq);
 177         init_waitqueue_head(&ca->hif_opdone_wq);
 178         init_waitqueue_head(&ca->hif_write_wq);
 179
 180         dprintk(MANTIS_ERROR, 1, "Registering EN50221 device");
 181         result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1);
 182         if (result != 0) {
 183                 dprintk(MANTIS_ERROR, 1, "EN50221: Initialization failed <%d>", result);
 184                 goto err;
 185         }
 186         dprintk(MANTIS_ERROR, 1, "Registered EN50221 device");
 187         mantis_evmgr_init(ca);
 188         return 0;
 189 err:
 190         kfree(ca);
 191         return result;
 192 }
 193 EXPORT_SYMBOL_GPL(mantis_ca_init);
 194
 195 void mantis_ca_exit(struct mantis_pci *mantis)
 196 {
 197         struct mantis_ca *ca = mantis->mantis_ca;
 198
 199         dprintk(MANTIS_DEBUG, 1, "Mantis CA exit");
 200
 201         mantis_evmgr_exit(ca);
 202         dprintk(MANTIS_ERROR, 1, "Unregistering EN50221 device");
 203         if (ca)
 204                 dvb_ca_en50221_release(&ca->en50221);
 205
 206         kfree(ca);
 207 }
 208 EXPORT_SYMBOL_GPL(mantis_ca_exit);