drivers/media/pci/mantis/mantis_ca.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/signal.h>
  10 #include <linux/slab.h>
  11 #include <linux/sched.h>
  12 #include <linux/interrupt.h>
  13 #include <asm/io.h>
  14
  15 #include <media/dmxdev.h>
  16 #include <media/dvbdev.h>
  17 #include <media/dvb_demux.h>
  18 #include <media/dvb_frontend.h>
  19 #include <media/dvb_net.h>
  20
  21 #include "mantis_common.h"
  22 #include "mantis_link.h"
  23 #include "mantis_hif.h"
  24 #include "mantis_reg.h"
  25
  26 #include "mantis_ca.h"
  27
  28 static int mantis_ca_read_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr)
  29 {
  30         struct mantis_ca *ca = en50221->data;
  31         struct mantis_pci *mantis = ca->ca_priv;
  32
  33         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Read", slot);
  34
  35         if (slot != 0)
  36                 return -EINVAL;
  37
  38         return mantis_hif_read_mem(ca, addr);
  39 }
  40
  41 static int mantis_ca_write_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr, u8 data)
  42 {
  43         struct mantis_ca *ca = en50221->data;
  44         struct mantis_pci *mantis = ca->ca_priv;
  45
  46         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Write", slot);
  47
  48         if (slot != 0)
  49                 return -EINVAL;
  50
  51         return mantis_hif_write_mem(ca, addr, data);
  52 }
  53
  54 static int mantis_ca_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
  55 {
  56         struct mantis_ca *ca = en50221->data;
  57         struct mantis_pci *mantis = ca->ca_priv;
  58
  59         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Read", slot);
  60
  61         if (slot != 0)
  62                 return -EINVAL;
  63
  64         return mantis_hif_read_iom(ca, addr);
  65 }
  66
  67 static int mantis_ca_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr, u8 data)
  68 {
  69         struct mantis_ca *ca = en50221->data;
  70         struct mantis_pci *mantis = ca->ca_priv;
  71
  72         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Write", slot);
  73
  74         if (slot != 0)
  75                 return -EINVAL;
  76
  77         return mantis_hif_write_iom(ca, addr, data);
  78 }
  79
  80 static int mantis_ca_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
  81 {
  82         struct mantis_ca *ca = en50221->data;
  83         struct mantis_pci *mantis = ca->ca_priv;
  84
  85         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot RESET", slot);
  86         udelay(500); /* Wait.. */
  87         mmwrite(0xda, MANTIS_PCMCIA_RESET); /* Leading edge assert */
  88         udelay(500);
  89         mmwrite(0x00, MANTIS_PCMCIA_RESET); /* Trailing edge deassert */
  90         msleep(1000);
  91         dvb_ca_en50221_camready_irq(&ca->en50221, 0);
  92
  93         return 0;
  94 }
  95
  96 static int mantis_ca_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
  97 {
  98         struct mantis_ca *ca = en50221->data;
  99         struct mantis_pci *mantis = ca->ca_priv;
 100
 101         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot shutdown", slot);
 102
 103         return 0;
 104 }
 105
 106 static int mantis_ts_control(struct dvb_ca_en50221 *en50221, int slot)
 107 {
 108         struct mantis_ca *ca = en50221->data;
 109         struct mantis_pci *mantis = ca->ca_priv;
 110
 111         dprintk(MANTIS_DEBUG, 1, "Slot(%d): TS control", slot);
 112
 113         return 0;
 114 }
 115
 116 static int mantis_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
 117 {
 118         struct mantis_ca *ca = en50221->data;
 119         struct mantis_pci *mantis = ca->ca_priv;
 120
 121         dprintk(MANTIS_DEBUG, 1, "Slot(%d): Poll Slot status", slot);
 122
 123         if (ca->slot_state == MODULE_INSERTED) {
 124                 dprintk(MANTIS_DEBUG, 1, "CA Module present and ready");
 125                 return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
 126         } else {
 127                 dprintk(MANTIS_DEBUG, 1, "CA Module not present or not ready");
 128         }
 129
 130         return 0;
 131 }
 132
 133 int mantis_ca_init(struct mantis_pci *mantis)
 134 {
 135         struct dvb_adapter *dvb_adapter = &mantis->dvb_adapter;
 136         struct mantis_ca *ca;
 137         int ca_flags = 0, result;
 138
 139         dprintk(MANTIS_DEBUG, 1, "Initializing Mantis CA");
 140         ca = kzalloc(sizeof(struct mantis_ca), GFP_KERNEL);
 141         if (!ca) {
 142                 dprintk(MANTIS_ERROR, 1, "Out of memory!, exiting ..");
 143                 result = -ENOMEM;
 144                 goto err;
 145         }
 146
 147         ca->ca_priv             = mantis;
 148         mantis->mantis_ca       = ca;
 149         ca_flags                = DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE;
 150         /* register CA interface */
 151         ca->en50221.owner               = THIS_MODULE;
 152         ca->en50221.read_attribute_mem  = mantis_ca_read_attr_mem;
 153         ca->en50221.write_attribute_mem = mantis_ca_write_attr_mem;
 154         ca->en50221.read_cam_control    = mantis_ca_read_cam_ctl;
 155         ca->en50221.write_cam_control   = mantis_ca_write_cam_ctl;
 156         ca->en50221.slot_reset          = mantis_ca_slot_reset;
 157         ca->en50221.slot_shutdown       = mantis_ca_slot_shutdown;
 158         ca->en50221.slot_ts_enable      = mantis_ts_control;
 159         ca->en50221.poll_slot_status    = mantis_slot_status;
 160         ca->en50221.data                = ca;
 161
 162         mutex_init(&ca->ca_lock);
 163
 164         init_waitqueue_head(&ca->hif_data_wq);
 165         init_waitqueue_head(&ca->hif_opdone_wq);
 166         init_waitqueue_head(&ca->hif_write_wq);
 167
 168         dprintk(MANTIS_ERROR, 1, "Registering EN50221 device");
 169         result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1);
 170         if (result != 0) {
 171                 dprintk(MANTIS_ERROR, 1, "EN50221: Initialization failed <%d>", result);
 172                 goto err;
 173         }
 174         dprintk(MANTIS_ERROR, 1, "Registered EN50221 device");
 175         mantis_evmgr_init(ca);
 176         return 0;
 177 err:
 178         kfree(ca);
 179         return result;
 180 }
 181 EXPORT_SYMBOL_GPL(mantis_ca_init);
 182
 183 void mantis_ca_exit(struct mantis_pci *mantis)
 184 {
 185         struct mantis_ca *ca = mantis->mantis_ca;
 186
 187         dprintk(MANTIS_DEBUG, 1, "Mantis CA exit");
 188         if (!ca)
 189                 return;
 190
 191         mantis_evmgr_exit(ca);
 192         dprintk(MANTIS_ERROR, 1, "Unregistering EN50221 device");
 193         dvb_ca_en50221_release(&ca->en50221);
 194
 195         kfree(ca);
 196 }
 197 EXPORT_SYMBOL_GPL(mantis_ca_exit);