drivers/media/pci/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 #include <asm/io.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"
  35 #include "mantis_hif.h"
  36 #include "mantis_reg.h"
  37
  38 #include "mantis_ca.h"
  39
  40 static int mantis_ca_read_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr)
  41 {
  42         struct mantis_ca *ca = en50221->data;
  43         struct mantis_pci *mantis = ca->ca_priv;
  44
  45         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Read", slot);
  46
  47         if (slot != 0)
  48                 return -EINVAL;
  49
  50         return mantis_hif_read_mem(ca, addr);
  51 }
  52
  53 static int mantis_ca_write_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr, u8 data)
  54 {
  55         struct mantis_ca *ca = en50221->data;
  56         struct mantis_pci *mantis = ca->ca_priv;
  57
  58         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Write", slot);
  59
  60         if (slot != 0)
  61                 return -EINVAL;
  62
  63         return mantis_hif_write_mem(ca, addr, data);
  64 }
  65
  66 static int mantis_ca_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
  67 {
  68         struct mantis_ca *ca = en50221->data;
  69         struct mantis_pci *mantis = ca->ca_priv;
  70
  71         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Read", slot);
  72
  73         if (slot != 0)
  74                 return -EINVAL;
  75
  76         return mantis_hif_read_iom(ca, addr);
  77 }
  78
  79 static int mantis_ca_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr, u8 data)
  80 {
  81         struct mantis_ca *ca = en50221->data;
  82         struct mantis_pci *mantis = ca->ca_priv;
  83
  84         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Write", slot);
  85
  86         if (slot != 0)
  87                 return -EINVAL;
  88
  89         return mantis_hif_write_iom(ca, addr, data);
  90 }
  91
  92 static int mantis_ca_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
  93 {
  94         struct mantis_ca *ca = en50221->data;
  95         struct mantis_pci *mantis = ca->ca_priv;
  96
  97         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot RESET", slot);
  98         udelay(500); /* Wait.. */
  99         mmwrite(0xda, MANTIS_PCMCIA_RESET); /* Leading edge assert */
 100         udelay(500);
 101         mmwrite(0x00, MANTIS_PCMCIA_RESET); /* Trailing edge deassert */
 102         msleep(1000);
 103         dvb_ca_en50221_camready_irq(&ca->en50221, 0);
 104
 105         return 0;
 106 }
 107
 108 static int mantis_ca_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 109 {
 110         struct mantis_ca *ca = en50221->data;
 111         struct mantis_pci *mantis = ca->ca_priv;
 112
 113         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot shutdown", slot);
 114
 115         return 0;
 116 }
 117
 118 static int mantis_ts_control(struct dvb_ca_en50221 *en50221, int slot)
 119 {
 120         struct mantis_ca *ca = en50221->data;
 121         struct mantis_pci *mantis = ca->ca_priv;
 122
 123         dprintk(MANTIS_DEBUG, 1, "Slot(%d): TS control", slot);
 124 /*      mantis_set_direction(mantis, 1); */ /* Enable TS through CAM */
 125
 126         return 0;
 127 }
 128
 129 static int mantis_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
 130 {
 131         struct mantis_ca *ca = en50221->data;
 132         struct mantis_pci *mantis = ca->ca_priv;
 133
 134         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Poll Slot status", slot);
 135
 136         if (ca->slot_state == MODULE_INSERTED) {
 137                 dprintk(MANTIS_DEBUG, 1, "CA Module present and ready");
 138                 return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
 139         } else {
 140                 dprintk(MANTIS_DEBUG, 1, "CA Module not present or not ready");
 141         }
 142
 143         return 0;
 144 }
 145
 146 int mantis_ca_init(struct mantis_pci *mantis)
 147 {
 148         struct dvb_adapter *dvb_adapter = &mantis->dvb_adapter;
 149         struct mantis_ca *ca;
 150         int ca_flags = 0, result;
 151
 152         dprintk(MANTIS_DEBUG, 1, "Initializing Mantis CA");
 153         ca = kzalloc(sizeof(struct mantis_ca), GFP_KERNEL);
 154         if (!ca) {
 155                 dprintk(MANTIS_ERROR, 1, "Out of memory!, exiting ..");
 156                 result = -ENOMEM;
 157                 goto err;
 158         }
 159
 160         ca->ca_priv             = mantis;
 161         mantis->mantis_ca       = ca;
 162         ca_flags                = DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE;
 163         /* register CA interface */
 164         ca->en50221.owner               = THIS_MODULE;
 165         ca->en50221.read_attribute_mem  = mantis_ca_read_attr_mem;
 166         ca->en50221.write_attribute_mem = mantis_ca_write_attr_mem;
 167         ca->en50221.read_cam_control    = mantis_ca_read_cam_ctl;
 168         ca->en50221.write_cam_control   = mantis_ca_write_cam_ctl;
 169         ca->en50221.slot_reset          = mantis_ca_slot_reset;
 170         ca->en50221.slot_shutdown       = mantis_ca_slot_shutdown;
 171         ca->en50221.slot_ts_enable      = mantis_ts_control;
 172         ca->en50221.poll_slot_status    = mantis_slot_status;
 173         ca->en50221.data                = ca;
 174
 175         mutex_init(&ca->ca_lock);
 176
 177         init_waitqueue_head(&ca->hif_data_wq);
 178         init_waitqueue_head(&ca->hif_opdone_wq);
 179         init_waitqueue_head(&ca->hif_write_wq);
 180
 181         dprintk(MANTIS_ERROR, 1, "Registering EN50221 device");
 182         result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1);
 183         if (result != 0) {
 184                 dprintk(MANTIS_ERROR, 1, "EN50221: Initialization failed <%d>", result);
 185                 goto err;
 186         }
 187         dprintk(MANTIS_ERROR, 1, "Registered EN50221 device");
 188         mantis_evmgr_init(ca);
 189         return 0;
 190 err:
 191         kfree(ca);
 192         return result;
 193 }
 194 EXPORT_SYMBOL_GPL(mantis_ca_init);
 195
 196 void mantis_ca_exit(struct mantis_pci *mantis)
 197 {
 198         struct mantis_ca *ca = mantis->mantis_ca;
 199
 200         dprintk(MANTIS_DEBUG, 1, "Mantis CA exit");
 201         if (!ca)
 202                 return;
 203
 204         mantis_evmgr_exit(ca);
 205         dprintk(MANTIS_ERROR, 1, "Unregistering EN50221 device");
 206         dvb_ca_en50221_release(&ca->en50221);
 207
 208         kfree(ca);
 209 }
 210 EXPORT_SYMBOL_GPL(mantis_ca_exit);