OSCL-LXR linux-6.0.1/​drivers/​media/​firewire/​firedtv-avc.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * FireDTV driver (formerly known as FireSAT)
  *
  * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
  * Copyright (C) 2008 Ben Backx <ben@bbackx.com>
  * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
  */
 
 #include <linux/bug.h>
 #include <linux/crc32.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/moduleparam.h>
 #include <linux/mutex.h>
 #include <linux/string.h>
 #include <linux/stringify.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 
 #include <media/dvb_frontend.h>
 
 #include "firedtv.h"
 
 #define FCP_COMMAND_REGISTER        0xfffff0000b00ULL
 
 #define AVC_CTYPE_CONTROL       0x0
 #define AVC_CTYPE_STATUS        0x1
 #define AVC_CTYPE_NOTIFY        0x3
 
 #define AVC_RESPONSE_ACCEPTED       0x9
 #define AVC_RESPONSE_STABLE     0xc
 #define AVC_RESPONSE_CHANGED        0xd
 #define AVC_RESPONSE_INTERIM        0xf
 
 #define AVC_SUBUNIT_TYPE_TUNER      (0x05 << 3)
 #define AVC_SUBUNIT_TYPE_UNIT       (0x1f << 3)
 
 #define AVC_OPCODE_VENDOR       0x00
 #define AVC_OPCODE_READ_DESCRIPTOR  0x09
 #define AVC_OPCODE_DSIT         0xc8
 #define AVC_OPCODE_DSD          0xcb
 
 #define DESCRIPTOR_TUNER_STATUS     0x80
 #define DESCRIPTOR_SUBUNIT_IDENTIFIER   0x00
 
 #define SFE_VENDOR_DE_COMPANYID_0   0x00 /* OUI of Digital Everywhere */
 #define SFE_VENDOR_DE_COMPANYID_1   0x12
 #define SFE_VENDOR_DE_COMPANYID_2   0x87
 
 #define SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL 0x0a
 #define SFE_VENDOR_OPCODE_LNB_CONTROL       0x52
 #define SFE_VENDOR_OPCODE_TUNE_QPSK     0x58 /* for DVB-S */
 
 #define SFE_VENDOR_OPCODE_GET_FIRMWARE_VERSION  0x00
 #define SFE_VENDOR_OPCODE_HOST2CA       0x56
 #define SFE_VENDOR_OPCODE_CA2HOST       0x57
 #define SFE_VENDOR_OPCODE_CISTATUS      0x59
 #define SFE_VENDOR_OPCODE_TUNE_QPSK2        0x60 /* for DVB-S2 */
 
 #define SFE_VENDOR_TAG_CA_RESET         0x00
 #define SFE_VENDOR_TAG_CA_APPLICATION_INFO  0x01
 #define SFE_VENDOR_TAG_CA_PMT           0x02
 #define SFE_VENDOR_TAG_CA_DATE_TIME     0x04
 #define SFE_VENDOR_TAG_CA_MMI           0x05
 #define SFE_VENDOR_TAG_CA_ENTER_MENU        0x07
 
 #define EN50221_LIST_MANAGEMENT_ONLY    0x03
 #define EN50221_TAG_APP_INFO        0x9f8021
 #define EN50221_TAG_CA_INFO     0x9f8031
 
 struct avc_command_frame {
     u8 ctype;
     u8 subunit;
     u8 opcode;
     u8 operand[509];
 };
 
 struct avc_response_frame {
     u8 response;
     u8 subunit;
     u8 opcode;
     u8 operand[509];
 };
 
 #define LAST_OPERAND (509 - 1)
 
 static inline void clear_operands(struct avc_command_frame *c, int from, int to)
 {
     memset(&c->operand[from], 0, to - from + 1);
 }
 
 static void pad_operands(struct avc_command_frame *c, int from)
 {
     int to = ALIGN(from, 4);
 
     if (from <= to && to <= LAST_OPERAND)
         clear_operands(c, from, to);
 }
 
 #define AVC_DEBUG_READ_DESCRIPTOR              0x0001
 #define AVC_DEBUG_DSIT                         0x0002
 #define AVC_DEBUG_DSD                          0x0004
 #define AVC_DEBUG_REGISTER_REMOTE_CONTROL      0x0008
 #define AVC_DEBUG_LNB_CONTROL                  0x0010
 #define AVC_DEBUG_TUNE_QPSK                    0x0020
 #define AVC_DEBUG_TUNE_QPSK2                   0x0040
 #define AVC_DEBUG_HOST2CA                      0x0080
 #define AVC_DEBUG_CA2HOST                      0x0100
 #define AVC_DEBUG_APPLICATION_PMT              0x4000
 #define AVC_DEBUG_FCP_PAYLOADS                 0x8000
 
 static int avc_debug;
 module_param_named(debug, avc_debug, int, 0644);
 MODULE_PARM_DESC(debug, "Verbose logging (none = 0"
     ", FCP subactions"
     ": READ DESCRIPTOR = "      __stringify(AVC_DEBUG_READ_DESCRIPTOR)
     ", DSIT = "         __stringify(AVC_DEBUG_DSIT)
     ", REGISTER_REMOTE_CONTROL = "  __stringify(AVC_DEBUG_REGISTER_REMOTE_CONTROL)
     ", LNB CONTROL = "      __stringify(AVC_DEBUG_LNB_CONTROL)
     ", TUNE QPSK = "        __stringify(AVC_DEBUG_TUNE_QPSK)
     ", TUNE QPSK2 = "       __stringify(AVC_DEBUG_TUNE_QPSK2)
     ", HOST2CA = "          __stringify(AVC_DEBUG_HOST2CA)
     ", CA2HOST = "          __stringify(AVC_DEBUG_CA2HOST)
     "; Application sent PMT = " __stringify(AVC_DEBUG_APPLICATION_PMT)
     ", FCP payloads = "     __stringify(AVC_DEBUG_FCP_PAYLOADS)
     ", or a combination, or all = -1)");
 
 /*
  * This is a workaround since there is no vendor specific command to retrieve
  * ca_info using AVC. If this parameter is not used, ca_system_id will be
  * filled with application_manufacturer from ca_app_info.
  * Digital Everywhere have said that adding ca_info is on their TODO list.
  */
 static unsigned int num_fake_ca_system_ids;
 static int fake_ca_system_ids[4] = { -1, -1, -1, -1 };
 module_param_array(fake_ca_system_ids, int, &num_fake_ca_system_ids, 0644);
 MODULE_PARM_DESC(fake_ca_system_ids, "If your CAM application manufacturer "
          "does not have the same ca_system_id as your CAS, you can "
          "override what ca_system_ids are presented to the "
          "application by setting this field to an array of ids.");
 
 static const char *debug_fcp_ctype(unsigned int ctype)
 {
     static const char *ctypes[] = {
         [0x0] = "CONTROL",      [0x1] = "STATUS",
         [0x2] = "SPECIFIC INQUIRY", [0x3] = "NOTIFY",
         [0x4] = "GENERAL INQUIRY",  [0x8] = "NOT IMPLEMENTED",
         [0x9] = "ACCEPTED",     [0xa] = "REJECTED",
         [0xb] = "IN TRANSITION",    [0xc] = "IMPLEMENTED/STABLE",
         [0xd] = "CHANGED",      [0xf] = "INTERIM",
     };
     const char *ret = ctype < ARRAY_SIZE(ctypes) ? ctypes[ctype] : NULL;
 
     return ret ? ret : "?";
 }
 
 static const char *debug_fcp_opcode(unsigned int opcode,
                     const u8 *data, int length)
 {
     switch (opcode) {
     case AVC_OPCODE_VENDOR:
         break;
     case AVC_OPCODE_READ_DESCRIPTOR:
         return avc_debug & AVC_DEBUG_READ_DESCRIPTOR ?
                 "ReadDescriptor" : NULL;
     case AVC_OPCODE_DSIT:
         return avc_debug & AVC_DEBUG_DSIT ?
                 "DirectSelectInfo.Type" : NULL;
     case AVC_OPCODE_DSD:
         return avc_debug & AVC_DEBUG_DSD ? "DirectSelectData" : NULL;
     default:
         return "Unknown";
     }
 
     if (length < 7 ||
         data[3] != SFE_VENDOR_DE_COMPANYID_0 ||
         data[4] != SFE_VENDOR_DE_COMPANYID_1 ||
         data[5] != SFE_VENDOR_DE_COMPANYID_2)
         return "Vendor/Unknown";
 
     switch (data[6]) {
     case SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL:
         return avc_debug & AVC_DEBUG_REGISTER_REMOTE_CONTROL ?
                 "RegisterRC" : NULL;
     case SFE_VENDOR_OPCODE_LNB_CONTROL:
         return avc_debug & AVC_DEBUG_LNB_CONTROL ? "LNBControl" : NULL;
     case SFE_VENDOR_OPCODE_TUNE_QPSK:
         return avc_debug & AVC_DEBUG_TUNE_QPSK ? "TuneQPSK" : NULL;
     case SFE_VENDOR_OPCODE_TUNE_QPSK2:
         return avc_debug & AVC_DEBUG_TUNE_QPSK2 ? "TuneQPSK2" : NULL;
     case SFE_VENDOR_OPCODE_HOST2CA:
         return avc_debug & AVC_DEBUG_HOST2CA ? "Host2CA" : NULL;
     case SFE_VENDOR_OPCODE_CA2HOST:
         return avc_debug & AVC_DEBUG_CA2HOST ? "CA2Host" : NULL;
     }
     return "Vendor/Unknown";
 }
 
 static void debug_fcp(const u8 *data, int length)
 {
     unsigned int subunit_type, subunit_id, opcode;
     const char *op, *prefix;
 
     prefix       = data[0] > 7 ? "FCP <- " : "FCP -> ";
     subunit_type = data[1] >> 3;
     subunit_id   = data[1] & 7;
     opcode       = subunit_type == 0x1e || subunit_id == 5 ? ~0 : data[2];
     op           = debug_fcp_opcode(opcode, data, length);
 
     if (op) {
         printk(KERN_INFO "%ssu=%x.%x l=%d: %-8s - %s\n",
                prefix, subunit_type, subunit_id, length,
                debug_fcp_ctype(data[0]), op);
         if (avc_debug & AVC_DEBUG_FCP_PAYLOADS)
             print_hex_dump(KERN_INFO, prefix, DUMP_PREFIX_NONE,
                        16, 1, data, length, false);
     }
 }
 
 static void debug_pmt(char *msg, int length)
 {
     printk(KERN_INFO "APP PMT -> l=%d\n", length);
     print_hex_dump(KERN_INFO, "APP PMT -> ", DUMP_PREFIX_NONE,
                16, 1, msg, length, false);
 }
 
 static int avc_write(struct firedtv *fdtv)
 {
     int err, retry;
 
     fdtv->avc_reply_received = false;
 
     for (retry = 0; retry < 6; retry++) {
         if (unlikely(avc_debug))
             debug_fcp(fdtv->avc_data, fdtv->avc_data_length);
 
         err = fdtv_write(fdtv, FCP_COMMAND_REGISTER,
                  fdtv->avc_data, fdtv->avc_data_length);
         if (err) {
             dev_err(fdtv->device, "FCP command write failed\n");
 
             return err;
         }
 
         /*
          * AV/C specs say that answers should be sent within 150 ms.
          * Time out after 200 ms.
          */
         if (wait_event_timeout(fdtv->avc_wait,
                        fdtv->avc_reply_received,
                        msecs_to_jiffies(200)) != 0)
             return 0;
     }
     dev_err(fdtv->device, "FCP response timed out\n");
 
     return -ETIMEDOUT;
 }
 
 static bool is_register_rc(struct avc_response_frame *r)
 {
     return r->opcode     == AVC_OPCODE_VENDOR &&
            r->operand[0] == SFE_VENDOR_DE_COMPANYID_0 &&
            r->operand[1] == SFE_VENDOR_DE_COMPANYID_1 &&
            r->operand[2] == SFE_VENDOR_DE_COMPANYID_2 &&
            r->operand[3] == SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL;
 }
 
 int avc_recv(struct firedtv *fdtv, void *data, size_t length)
 {
     struct avc_response_frame *r = data;
 
     if (unlikely(avc_debug))
         debug_fcp(data, length);
 
     if (length >= 8 && is_register_rc(r)) {
         switch (r->response) {
         case AVC_RESPONSE_CHANGED:
             fdtv_handle_rc(fdtv, r->operand[4] << 8 | r->operand[5]);
             schedule_work(&fdtv->remote_ctrl_work);
             break;
         case AVC_RESPONSE_INTERIM:
             if (is_register_rc((void *)fdtv->avc_data))
                 goto wake;
             break;
         default:
             dev_info(fdtv->device,
                  "remote control result = %d\n", r->response);
         }
         return 0;
     }
 
     if (fdtv->avc_reply_received) {
         dev_err(fdtv->device, "out-of-order AVC response, ignored\n");
         return -EIO;
     }
 
     memcpy(fdtv->avc_data, data, length);
     fdtv->avc_data_length = length;
 wake:
     fdtv->avc_reply_received = true;
     wake_up(&fdtv->avc_wait);
 
     return 0;
 }
 
 static int add_pid_filter(struct firedtv *fdtv, u8 *operand)
 {
     int i, n, pos = 1;
 
     for (i = 0, n = 0; i < 16; i++) {
         if (test_bit(i, &fdtv->channel_active)) {
             operand[pos++] = 0x13; /* flowfunction relay */
             operand[pos++] = 0x80; /* dsd_sel_spec_valid_flags -> PID */
             operand[pos++] = (fdtv->channel_pid[i] >> 8) & 0x1f;
             operand[pos++] = fdtv->channel_pid[i] & 0xff;
             operand[pos++] = 0x00; /* tableID */
             operand[pos++] = 0x00; /* filter_length */
             n++;
         }
     }
     operand[0] = n;
 
     return pos;
 }
 
 /*
  * tuning command for setting the relative LNB frequency
  * (not supported by the AVC standard)
  */
 static int avc_tuner_tuneqpsk(struct firedtv *fdtv,
                   struct dtv_frontend_properties *p)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
 
     c->opcode = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     if (fdtv->type == FIREDTV_DVB_S2)
         c->operand[3] = SFE_VENDOR_OPCODE_TUNE_QPSK2;
     else
         c->operand[3] = SFE_VENDOR_OPCODE_TUNE_QPSK;
 
     c->operand[4] = (p->frequency >> 24) & 0xff;
     c->operand[5] = (p->frequency >> 16) & 0xff;
     c->operand[6] = (p->frequency >> 8) & 0xff;
     c->operand[7] = p->frequency & 0xff;
 
     c->operand[8] = ((p->symbol_rate / 1000) >> 8) & 0xff;
     c->operand[9] = (p->symbol_rate / 1000) & 0xff;
 
     switch (p->fec_inner) {
     case FEC_1_2:   c->operand[10] = 0x1; break;
     case FEC_2_3:   c->operand[10] = 0x2; break;
     case FEC_3_4:   c->operand[10] = 0x3; break;
     case FEC_5_6:   c->operand[10] = 0x4; break;
     case FEC_7_8:   c->operand[10] = 0x5; break;
     case FEC_4_5:
     case FEC_8_9:
     case FEC_AUTO:
     default:    c->operand[10] = 0x0;
     }
 
     if (fdtv->voltage == 0xff)
         c->operand[11] = 0xff;
     else if (fdtv->voltage == SEC_VOLTAGE_18) /* polarisation */
         c->operand[11] = 0;
     else
         c->operand[11] = 1;
 
     if (fdtv->tone == 0xff)
         c->operand[12] = 0xff;
     else if (fdtv->tone == SEC_TONE_ON) /* band */
         c->operand[12] = 1;
     else
         c->operand[12] = 0;
 
     if (fdtv->type == FIREDTV_DVB_S2) {
         if (fdtv->fe.dtv_property_cache.delivery_system == SYS_DVBS2) {
             switch (fdtv->fe.dtv_property_cache.modulation) {
             case QAM_16:        c->operand[13] = 0x1; break;
             case QPSK:      c->operand[13] = 0x2; break;
             case PSK_8:     c->operand[13] = 0x3; break;
             default:        c->operand[13] = 0x2; break;
             }
             switch (fdtv->fe.dtv_property_cache.rolloff) {
             case ROLLOFF_35:    c->operand[14] = 0x2; break;
             case ROLLOFF_20:    c->operand[14] = 0x0; break;
             case ROLLOFF_25:    c->operand[14] = 0x1; break;
             case ROLLOFF_AUTO:
             default:        c->operand[14] = 0x2; break;
             /* case ROLLOFF_NONE:   c->operand[14] = 0xff; break; */
             }
             switch (fdtv->fe.dtv_property_cache.pilot) {
             case PILOT_AUTO:    c->operand[15] = 0x0; break;
             case PILOT_OFF:     c->operand[15] = 0x0; break;
             case PILOT_ON:      c->operand[15] = 0x1; break;
             }
         } else {
             c->operand[13] = 0x1;  /* auto modulation */
             c->operand[14] = 0xff; /* disable rolloff */
             c->operand[15] = 0xff; /* disable pilot */
         }
         return 16;
     } else {
         return 13;
     }
 }
 
 static int avc_tuner_dsd_dvb_c(struct firedtv *fdtv,
                    struct dtv_frontend_properties *p)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
 
     c->opcode = AVC_OPCODE_DSD;
 
     c->operand[0] = 0;    /* source plug */
     c->operand[1] = 0xd2; /* subfunction replace */
     c->operand[2] = 0x20; /* system id = DVB */
     c->operand[3] = 0x00; /* antenna number */
     c->operand[4] = 0x11; /* system_specific_multiplex selection_length */
 
     /* multiplex_valid_flags, high byte */
     c->operand[5] =   0 << 7 /* reserved */
             | 0 << 6 /* Polarisation */
             | 0 << 5 /* Orbital_Pos */
             | 1 << 4 /* Frequency */
             | 1 << 3 /* Symbol_Rate */
             | 0 << 2 /* FEC_outer */
             | (p->fec_inner  != FEC_AUTO ? 1 << 1 : 0)
             | (p->modulation != QAM_AUTO ? 1 << 0 : 0);
 
     /* multiplex_valid_flags, low byte */
     c->operand[6] =   0 << 7 /* NetworkID */
             | 0 << 0 /* reserved */ ;
 
     c->operand[7]  = 0x00;
     c->operand[8]  = 0x00;
     c->operand[9]  = 0x00;
     c->operand[10] = 0x00;
 
     c->operand[11] = (((p->frequency / 4000) >> 16) & 0xff) | (2 << 6);
     c->operand[12] = ((p->frequency / 4000) >> 8) & 0xff;
     c->operand[13] = (p->frequency / 4000) & 0xff;
     c->operand[14] = ((p->symbol_rate / 1000) >> 12) & 0xff;
     c->operand[15] = ((p->symbol_rate / 1000) >> 4) & 0xff;
     c->operand[16] = ((p->symbol_rate / 1000) << 4) & 0xf0;
     c->operand[17] = 0x00;
 
     switch (p->fec_inner) {
     case FEC_1_2:   c->operand[18] = 0x1; break;
     case FEC_2_3:   c->operand[18] = 0x2; break;
     case FEC_3_4:   c->operand[18] = 0x3; break;
     case FEC_5_6:   c->operand[18] = 0x4; break;
     case FEC_7_8:   c->operand[18] = 0x5; break;
     case FEC_8_9:   c->operand[18] = 0x6; break;
     case FEC_4_5:   c->operand[18] = 0x8; break;
     case FEC_AUTO:
     default:    c->operand[18] = 0x0;
     }
 
     switch (p->modulation) {
     case QAM_16:    c->operand[19] = 0x08; break;
     case QAM_32:    c->operand[19] = 0x10; break;
     case QAM_64:    c->operand[19] = 0x18; break;
     case QAM_128:   c->operand[19] = 0x20; break;
     case QAM_256:   c->operand[19] = 0x28; break;
     case QAM_AUTO:
     default:    c->operand[19] = 0x00;
     }
 
     c->operand[20] = 0x00;
     c->operand[21] = 0x00;
 
     return 22 + add_pid_filter(fdtv, &c->operand[22]);
 }
 
 static int avc_tuner_dsd_dvb_t(struct firedtv *fdtv,
                    struct dtv_frontend_properties *p)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
 
     c->opcode = AVC_OPCODE_DSD;
 
     c->operand[0] = 0;    /* source plug */
     c->operand[1] = 0xd2; /* subfunction replace */
     c->operand[2] = 0x20; /* system id = DVB */
     c->operand[3] = 0x00; /* antenna number */
     c->operand[4] = 0x0c; /* system_specific_multiplex selection_length */
 
     /* multiplex_valid_flags, high byte */
     c->operand[5] =
           0 << 7 /* reserved */
         | 1 << 6 /* CenterFrequency */
         | (p->bandwidth_hz != 0        ? 1 << 5 : 0)
         | (p->modulation  != QAM_AUTO              ? 1 << 4 : 0)
         | (p->hierarchy != HIERARCHY_AUTO ? 1 << 3 : 0)
         | (p->code_rate_HP   != FEC_AUTO              ? 1 << 2 : 0)
         | (p->code_rate_LP   != FEC_AUTO              ? 1 << 1 : 0)
         | (p->guard_interval != GUARD_INTERVAL_AUTO   ? 1 << 0 : 0);
 
     /* multiplex_valid_flags, low byte */
     c->operand[6] =
           0 << 7 /* NetworkID */
         | (p->transmission_mode != TRANSMISSION_MODE_AUTO ? 1 << 6 : 0)
         | 0 << 5 /* OtherFrequencyFlag */
         | 0 << 0 /* reserved */ ;
 
     c->operand[7]  = 0x0;
     c->operand[8]  = (p->frequency / 10) >> 24;
     c->operand[9]  = ((p->frequency / 10) >> 16) & 0xff;
     c->operand[10] = ((p->frequency / 10) >>  8) & 0xff;
     c->operand[11] = (p->frequency / 10) & 0xff;
 
     switch (p->bandwidth_hz) {
     case 7000000:   c->operand[12] = 0x20; break;
     case 8000000:
     case 6000000:   /* not defined by AVC spec */
     case 0:
     default:        c->operand[12] = 0x00;
     }
 
     switch (p->modulation) {
     case QAM_16:    c->operand[13] = 1 << 6; break;
     case QAM_64:    c->operand[13] = 2 << 6; break;
     case QPSK:
     default:    c->operand[13] = 0x00;
     }
 
     switch (p->hierarchy) {
     case HIERARCHY_1:   c->operand[13] |= 1 << 3; break;
     case HIERARCHY_2:   c->operand[13] |= 2 << 3; break;
     case HIERARCHY_4:   c->operand[13] |= 3 << 3; break;
     case HIERARCHY_AUTO:
     case HIERARCHY_NONE:
     default:        break;
     }
 
     switch (p->code_rate_HP) {
     case FEC_2_3:   c->operand[13] |= 1; break;
     case FEC_3_4:   c->operand[13] |= 2; break;
     case FEC_5_6:   c->operand[13] |= 3; break;
     case FEC_7_8:   c->operand[13] |= 4; break;
     case FEC_1_2:
     default:    break;
     }
 
     switch (p->code_rate_LP) {
     case FEC_2_3:   c->operand[14] = 1 << 5; break;
     case FEC_3_4:   c->operand[14] = 2 << 5; break;
     case FEC_5_6:   c->operand[14] = 3 << 5; break;
     case FEC_7_8:   c->operand[14] = 4 << 5; break;
     case FEC_1_2:
     default:    c->operand[14] = 0x00; break;
     }
 
     switch (p->guard_interval) {
     case GUARD_INTERVAL_1_16:   c->operand[14] |= 1 << 3; break;
     case GUARD_INTERVAL_1_8:    c->operand[14] |= 2 << 3; break;
     case GUARD_INTERVAL_1_4:    c->operand[14] |= 3 << 3; break;
     case GUARD_INTERVAL_1_32:
     case GUARD_INTERVAL_AUTO:
     default:            break;
     }
 
     switch (p->transmission_mode) {
     case TRANSMISSION_MODE_8K:  c->operand[14] |= 1 << 1; break;
     case TRANSMISSION_MODE_2K:
     case TRANSMISSION_MODE_AUTO:
     default:            break;
     }
 
     c->operand[15] = 0x00; /* network_ID[0] */
     c->operand[16] = 0x00; /* network_ID[1] */
 
     return 17 + add_pid_filter(fdtv, &c->operand[17]);
 }
 
 int avc_tuner_dsd(struct firedtv *fdtv,
           struct dtv_frontend_properties *p)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int pos, ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
 
     switch (fdtv->type) {
     case FIREDTV_DVB_S:
     case FIREDTV_DVB_S2: pos = avc_tuner_tuneqpsk(fdtv, p); break;
     case FIREDTV_DVB_C: pos = avc_tuner_dsd_dvb_c(fdtv, p); break;
     case FIREDTV_DVB_T: pos = avc_tuner_dsd_dvb_t(fdtv, p); break;
     default:
         BUG();
     }
     pad_operands(c, pos);
 
     fdtv->avc_data_length = ALIGN(3 + pos, 4);
     ret = avc_write(fdtv);
 #if 0
     /*
      * FIXME:
      * u8 *status was an out-parameter of avc_tuner_dsd, unused by caller.
      * Check for AVC_RESPONSE_ACCEPTED here instead?
      */
     if (status)
         *status = r->operand[2];
 #endif
     mutex_unlock(&fdtv->avc_mutex);
 
     if (ret == 0)
         msleep(500);
 
     return ret;
 }
 
 int avc_tuner_set_pids(struct firedtv *fdtv, unsigned char pidc, u16 pid[])
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret, pos, k;
 
     if (pidc > 16 && pidc != 0xff)
         return -EINVAL;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_DSD;
 
     c->operand[0] = 0;  /* source plug */
     c->operand[1] = 0xd2;   /* subfunction replace */
     c->operand[2] = 0x20;   /* system id = DVB */
     c->operand[3] = 0x00;   /* antenna number */
     c->operand[4] = 0x00;   /* system_specific_multiplex selection_length */
     c->operand[5] = pidc;   /* Nr_of_dsd_sel_specs */
 
     pos = 6;
     if (pidc != 0xff)
         for (k = 0; k < pidc; k++) {
             c->operand[pos++] = 0x13; /* flowfunction relay */
             c->operand[pos++] = 0x80; /* dsd_sel_spec_valid_flags -> PID */
             c->operand[pos++] = (pid[k] >> 8) & 0x1f;
             c->operand[pos++] = pid[k] & 0xff;
             c->operand[pos++] = 0x00; /* tableID */
             c->operand[pos++] = 0x00; /* filter_length */
         }
     pad_operands(c, pos);
 
     fdtv->avc_data_length = ALIGN(3 + pos, 4);
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     if (ret == 0)
         msleep(50);
 
     return ret;
 }
 
 int avc_tuner_get_ts(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret, sl;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_DSIT;
 
     sl = fdtv->type == FIREDTV_DVB_T ? 0x0c : 0x11;
 
     c->operand[0] = 0;  /* source plug */
     c->operand[1] = 0xd2;   /* subfunction replace */
     c->operand[2] = 0xff;   /* status */
     c->operand[3] = 0x20;   /* system id = DVB */
     c->operand[4] = 0x00;   /* antenna number */
     c->operand[5] = 0x0;    /* system_specific_search_flags */
     c->operand[6] = sl; /* system_specific_multiplex selection_length */
     /*
      * operand[7]: valid_flags[0]
      * operand[8]: valid_flags[1]
      * operand[7 + sl]: nr_of_dsit_sel_specs (always 0)
      */
     clear_operands(c, 7, 24);
 
     fdtv->avc_data_length = fdtv->type == FIREDTV_DVB_T ? 24 : 28;
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     if (ret == 0)
         msleep(250);
 
     return ret;
 }
 
 int avc_identify_subunit(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_READ_DESCRIPTOR;
 
     c->operand[0] = DESCRIPTOR_SUBUNIT_IDENTIFIER;
     c->operand[1] = 0xff;
     c->operand[2] = 0x00;
     c->operand[3] = 0x00; /* length highbyte */
     c->operand[4] = 0x08; /* length lowbyte  */
     c->operand[5] = 0x00; /* offset highbyte */
     c->operand[6] = 0x0d; /* offset lowbyte  */
     clear_operands(c, 7, 8); /* padding */
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     if ((r->response != AVC_RESPONSE_STABLE &&
          r->response != AVC_RESPONSE_ACCEPTED) ||
         (r->operand[3] << 8) + r->operand[4] != 8) {
         dev_err(fdtv->device, "cannot read subunit identifier\n");
         ret = -EINVAL;
     }
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 #define SIZEOF_ANTENNA_INPUT_INFO 22
 
 int avc_tuner_status(struct firedtv *fdtv, struct firedtv_tuner_status *stat)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int length, ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_READ_DESCRIPTOR;
 
     c->operand[0] = DESCRIPTOR_TUNER_STATUS;
     c->operand[1] = 0xff;   /* read_result_status */
     /*
      * operand[2]: reserved
      * operand[3]: SIZEOF_ANTENNA_INPUT_INFO >> 8
      * operand[4]: SIZEOF_ANTENNA_INPUT_INFO & 0xff
      */
     clear_operands(c, 2, 31);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     if (r->response != AVC_RESPONSE_STABLE &&
         r->response != AVC_RESPONSE_ACCEPTED) {
         dev_err(fdtv->device, "cannot read tuner status\n");
         ret = -EINVAL;
         goto out;
     }
 
     length = r->operand[9];
     if (r->operand[1] != 0x10 || length != SIZEOF_ANTENNA_INPUT_INFO) {
         dev_err(fdtv->device, "got invalid tuner status\n");
         ret = -EINVAL;
         goto out;
     }
 
     stat->active_system     = r->operand[10];
     stat->searching         = r->operand[11] >> 7 & 1;
     stat->moving            = r->operand[11] >> 6 & 1;
     stat->no_rf         = r->operand[11] >> 5 & 1;
     stat->input         = r->operand[12] >> 7 & 1;
     stat->selected_antenna      = r->operand[12] & 0x7f;
     stat->ber           = r->operand[13] << 24 |
                       r->operand[14] << 16 |
                       r->operand[15] << 8 |
                       r->operand[16];
     stat->signal_strength       = r->operand[17];
     stat->raster_frequency      = r->operand[18] >> 6 & 2;
     stat->rf_frequency      = (r->operand[18] & 0x3f) << 16 |
                       r->operand[19] << 8 |
                       r->operand[20];
     stat->man_dep_info_length   = r->operand[21];
     stat->front_end_error       = r->operand[22] >> 4 & 1;
     stat->antenna_error     = r->operand[22] >> 3 & 1;
     stat->front_end_power_status    = r->operand[22] >> 1 & 1;
     stat->power_supply      = r->operand[22] & 1;
     stat->carrier_noise_ratio   = r->operand[23] << 8 |
                       r->operand[24];
     stat->power_supply_voltage  = r->operand[27];
     stat->antenna_voltage       = r->operand[28];
     stat->firewire_bus_voltage  = r->operand[29];
     stat->ca_mmi            = r->operand[30] & 1;
     stat->ca_pmt_reply      = r->operand[31] >> 7 & 1;
     stat->ca_date_time_request  = r->operand[31] >> 6 & 1;
     stat->ca_application_info   = r->operand[31] >> 5 & 1;
     stat->ca_module_present_status  = r->operand[31] >> 4 & 1;
     stat->ca_dvb_flag       = r->operand[31] >> 3 & 1;
     stat->ca_error_flag     = r->operand[31] >> 2 & 1;
     stat->ca_initialization_status  = r->operand[31] >> 1 & 1;
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_lnb_control(struct firedtv *fdtv, char voltage, char burst,
             char conttone, char nrdiseq,
             struct dvb_diseqc_master_cmd *diseqcmd)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int pos, j, k, ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_LNB_CONTROL;
     c->operand[4] = voltage;
     c->operand[5] = nrdiseq;
 
     pos = 6;
     for (j = 0; j < nrdiseq; j++) {
         c->operand[pos++] = diseqcmd[j].msg_len;
 
         for (k = 0; k < diseqcmd[j].msg_len; k++)
             c->operand[pos++] = diseqcmd[j].msg[k];
     }
     c->operand[pos++] = burst;
     c->operand[pos++] = conttone;
     pad_operands(c, pos);
 
     fdtv->avc_data_length = ALIGN(3 + pos, 4);
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     if (r->response != AVC_RESPONSE_ACCEPTED) {
         dev_err(fdtv->device, "LNB control failed\n");
         ret = -EINVAL;
     }
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_register_remote_control(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_NOTIFY;
     c->subunit = AVC_SUBUNIT_TYPE_UNIT | 7;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL;
     c->operand[4] = 0; /* padding */
 
     fdtv->avc_data_length = 8;
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 void avc_remote_ctrl_work(struct work_struct *work)
 {
     struct firedtv *fdtv =
             container_of(work, struct firedtv, remote_ctrl_work);
 
     /* Should it be rescheduled in failure cases? */
     avc_register_remote_control(fdtv);
 }
 
 #if 0 /* FIXME: unused */
 int avc_tuner_host2ca(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
     clear_operands(c, 6, 8);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 #endif
 
 static int get_ca_object_pos(struct avc_response_frame *r)
 {
     int length = 1;
 
     /* Check length of length field */
     if (r->operand[7] & 0x80)
         length = (r->operand[7] & 0x7f) + 1;
     return length + 7;
 }
 
 static int get_ca_object_length(struct avc_response_frame *r)
 {
 #if 0 /* FIXME: unused */
     int size = 0;
     int i;
 
     if (r->operand[7] & 0x80)
         for (i = 0; i < (r->operand[7] & 0x7f); i++) {
             size <<= 8;
             size += r->operand[8 + i];
         }
 #endif
     return r->operand[7];
 }
 
 int avc_ca_app_info(struct firedtv *fdtv, unsigned char *app_info,
             unsigned int *len)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int pos, ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_STATUS;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
     clear_operands(c, 6, LAST_OPERAND);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     /* FIXME: check response code and validate response data */
 
     pos = get_ca_object_pos(r);
     app_info[0] = (EN50221_TAG_APP_INFO >> 16) & 0xff;
     app_info[1] = (EN50221_TAG_APP_INFO >>  8) & 0xff;
     app_info[2] = (EN50221_TAG_APP_INFO >>  0) & 0xff;
     app_info[3] = 6 + r->operand[pos + 4];
     app_info[4] = 0x01;
     memcpy(&app_info[5], &r->operand[pos], 5 + r->operand[pos + 4]);
     *len = app_info[3] + 4;
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_info(struct firedtv *fdtv, unsigned char *app_info,
         unsigned int *len)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int i, pos, ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_STATUS;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
     clear_operands(c, 6, LAST_OPERAND);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     /* FIXME: check response code and validate response data */
 
     pos = get_ca_object_pos(r);
     app_info[0] = (EN50221_TAG_CA_INFO >> 16) & 0xff;
     app_info[1] = (EN50221_TAG_CA_INFO >>  8) & 0xff;
     app_info[2] = (EN50221_TAG_CA_INFO >>  0) & 0xff;
     if (num_fake_ca_system_ids == 0) {
         app_info[3] = 2;
         app_info[4] = r->operand[pos + 0];
         app_info[5] = r->operand[pos + 1];
     } else {
         app_info[3] = num_fake_ca_system_ids * 2;
         for (i = 0; i < num_fake_ca_system_ids; i++) {
             app_info[4 + i * 2] =
                 (fake_ca_system_ids[i] >> 8) & 0xff;
             app_info[5 + i * 2] = fake_ca_system_ids[i] & 0xff;
         }
     }
     *len = app_info[3] + 4;
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_reset(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_RESET; /* ca tag */
     c->operand[6] = 0; /* more/last */
     c->operand[7] = 1; /* length */
     c->operand[8] = 0; /* force hardware reset */
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_pmt(struct firedtv *fdtv, char *msg, int length)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int list_management;
     int program_info_length;
     int pmt_cmd_id;
     int read_pos;
     int write_pos;
     int es_info_length;
     int crc32_csum;
     int ret;
 
     if (unlikely(avc_debug & AVC_DEBUG_APPLICATION_PMT))
         debug_pmt(msg, length);
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_CONTROL;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     if (msg[0] != EN50221_LIST_MANAGEMENT_ONLY) {
         dev_info(fdtv->device, "forcing list_management to ONLY\n");
         msg[0] = EN50221_LIST_MANAGEMENT_ONLY;
     }
     /* We take the cmd_id from the programme level only! */
     list_management = msg[0];
     program_info_length = ((msg[4] & 0x0f) << 8) + msg[5];
     if (program_info_length > 0)
         program_info_length--; /* Remove pmt_cmd_id */
     pmt_cmd_id = msg[6];
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_PMT; /* ca tag */
     c->operand[6] = 0; /* more/last */
     /* Use three bytes for length field in case length > 127 */
     c->operand[10] = list_management;
     c->operand[11] = 0x01; /* pmt_cmd=OK_descramble */
 
     /* TS program map table */
 
     c->operand[12] = 0x02; /* Table id=2 */
     c->operand[13] = 0x80; /* Section syntax + length */
 
     c->operand[15] = msg[1]; /* Program number */
     c->operand[16] = msg[2];
     c->operand[17] = msg[3]; /* Version number and current/next */
     c->operand[18] = 0x00; /* Section number=0 */
     c->operand[19] = 0x00; /* Last section number=0 */
     c->operand[20] = 0x1f; /* PCR_PID=1FFF */
     c->operand[21] = 0xff;
     c->operand[22] = (program_info_length >> 8); /* Program info length */
     c->operand[23] = (program_info_length & 0xff);
 
     /* CA descriptors at programme level */
     read_pos = 6;
     write_pos = 24;
     if (program_info_length > 0) {
         pmt_cmd_id = msg[read_pos++];
         if (pmt_cmd_id != 1 && pmt_cmd_id != 4)
             dev_err(fdtv->device,
                 "invalid pmt_cmd_id %d\n", pmt_cmd_id);
         if (program_info_length > sizeof(c->operand) - 4 - write_pos) {
             ret = -EINVAL;
             goto out;
         }
 
         memcpy(&c->operand[write_pos], &msg[read_pos],
                program_info_length);
         read_pos += program_info_length;
         write_pos += program_info_length;
     }
     while (read_pos + 4 < length) {
         if (write_pos + 4 >= sizeof(c->operand) - 4) {
             ret = -EINVAL;
             goto out;
         }
         c->operand[write_pos++] = msg[read_pos++];
         c->operand[write_pos++] = msg[read_pos++];
         c->operand[write_pos++] = msg[read_pos++];
         es_info_length =
             ((msg[read_pos] & 0x0f) << 8) + msg[read_pos + 1];
         read_pos += 2;
         if (es_info_length > 0)
             es_info_length--; /* Remove pmt_cmd_id */
         c->operand[write_pos++] = es_info_length >> 8;
         c->operand[write_pos++] = es_info_length & 0xff;
         if (es_info_length > 0) {
             if (read_pos >= length) {
                 ret = -EINVAL;
                 goto out;
             }
             pmt_cmd_id = msg[read_pos++];
             if (pmt_cmd_id != 1 && pmt_cmd_id != 4)
                 dev_err(fdtv->device, "invalid pmt_cmd_id %d at stream level\n",
                     pmt_cmd_id);
 
             if (es_info_length > sizeof(c->operand) - 4 - write_pos ||
                 es_info_length > length - read_pos) {
                 ret = -EINVAL;
                 goto out;
             }
 
             memcpy(&c->operand[write_pos], &msg[read_pos],
                    es_info_length);
             read_pos += es_info_length;
             write_pos += es_info_length;
         }
     }
     write_pos += 4; /* CRC */
 
     c->operand[7] = 0x82;
     c->operand[8] = (write_pos - 10) >> 8;
     c->operand[9] = (write_pos - 10) & 0xff;
     c->operand[14] = write_pos - 15;
 
     crc32_csum = crc32_be(0, &c->operand[10], c->operand[12] - 1);
     c->operand[write_pos - 4] = (crc32_csum >> 24) & 0xff;
     c->operand[write_pos - 3] = (crc32_csum >> 16) & 0xff;
     c->operand[write_pos - 2] = (crc32_csum >>  8) & 0xff;
     c->operand[write_pos - 1] = (crc32_csum >>  0) & 0xff;
     pad_operands(c, write_pos);
 
     fdtv->avc_data_length = ALIGN(3 + write_pos, 4);
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     if (r->response != AVC_RESPONSE_ACCEPTED) {
         dev_err(fdtv->device,
             "CA PMT failed with response 0x%x\n", r->response);
         ret = -EACCES;
     }
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_get_time_date(struct firedtv *fdtv, int *interval)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_STATUS;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_DATE_TIME; /* ca tag */
     clear_operands(c, 6, LAST_OPERAND);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     /* FIXME: check response code and validate response data */
 
     *interval = r->operand[get_ca_object_pos(r)];
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_enter_menu(struct firedtv *fdtv)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_STATUS;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_ENTER_MENU;
     clear_operands(c, 6, 8);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
 
     /* FIXME: check response code? */
 
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 int avc_ca_get_mmi(struct firedtv *fdtv, char *mmi_object, unsigned int *len)
 {
     struct avc_command_frame *c = (void *)fdtv->avc_data;
     struct avc_response_frame *r = (void *)fdtv->avc_data;
     int ret;
 
     mutex_lock(&fdtv->avc_mutex);
 
     c->ctype   = AVC_CTYPE_STATUS;
     c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
     c->opcode  = AVC_OPCODE_VENDOR;
 
     c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
     c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
     c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
     c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
     c->operand[4] = 0; /* slot */
     c->operand[5] = SFE_VENDOR_TAG_CA_MMI;
     clear_operands(c, 6, LAST_OPERAND);
 
     fdtv->avc_data_length = 12;
     ret = avc_write(fdtv);
     if (ret < 0)
         goto out;
 
     /* FIXME: check response code and validate response data */
 
     *len = get_ca_object_length(r);
     memcpy(mmi_object, &r->operand[get_ca_object_pos(r)], *len);
 out:
     mutex_unlock(&fdtv->avc_mutex);
 
     return ret;
 }
 
 #define CMP_OUTPUT_PLUG_CONTROL_REG_0   0xfffff0000904ULL
 
 static int cmp_read(struct firedtv *fdtv, u64 addr, __be32 *data)
 {
     int ret;
 
     ret = fdtv_read(fdtv, addr, data);
     if (ret < 0)
         dev_err(fdtv->device, "CMP: read I/O error\n");
 
     return ret;
 }
 
 static int cmp_lock(struct firedtv *fdtv, u64 addr, __be32 data[])
 {
     int ret;
 
     ret = fdtv_lock(fdtv, addr, data);
     if (ret < 0)
         dev_err(fdtv->device, "CMP: lock I/O error\n");
 
     return ret;
 }
 
 static inline u32 get_opcr(__be32 opcr, u32 mask, u32 shift)
 {
     return (be32_to_cpu(opcr) >> shift) & mask;
 }
 
 static inline void set_opcr(__be32 *opcr, u32 value, u32 mask, u32 shift)
 {
     *opcr &= ~cpu_to_be32(mask << shift);
     *opcr |= cpu_to_be32((value & mask) << shift);
 }
 
 #define get_opcr_online(v)      get_opcr((v), 0x1, 31)
 #define get_opcr_p2p_connections(v) get_opcr((v), 0x3f, 24)
 #define get_opcr_channel(v)     get_opcr((v), 0x3f, 16)
 
 #define set_opcr_p2p_connections(p, v)  set_opcr((p), (v), 0x3f, 24)
 #define set_opcr_channel(p, v)      set_opcr((p), (v), 0x3f, 16)
 #define set_opcr_data_rate(p, v)    set_opcr((p), (v), 0x3, 14)
 #define set_opcr_overhead_id(p, v)  set_opcr((p), (v), 0xf, 10)
 
 int cmp_establish_pp_connection(struct firedtv *fdtv, int plug, int channel)
 {
     __be32 old_opcr, opcr[2];
     u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2);
     int attempts = 0;
     int ret;
 
     ret = cmp_read(fdtv, opcr_address, opcr);
     if (ret < 0)
         return ret;
 
 repeat:
     if (!get_opcr_online(*opcr)) {
         dev_err(fdtv->device, "CMP: output offline\n");
         return -EBUSY;
     }
 
     old_opcr = *opcr;
 
     if (get_opcr_p2p_connections(*opcr)) {
         if (get_opcr_channel(*opcr) != channel) {
             dev_err(fdtv->device, "CMP: cannot change channel\n");
             return -EBUSY;
         }
         dev_info(fdtv->device, "CMP: overlaying connection\n");
 
         /* We don't allocate isochronous resources. */
     } else {
         set_opcr_channel(opcr, channel);
         set_opcr_data_rate(opcr, 2); /* S400 */
 
         /* FIXME: this is for the worst case - optimize */
         set_opcr_overhead_id(opcr, 0);
 
         /* FIXME: allocate isochronous channel and bandwidth at IRM */
     }
 
     set_opcr_p2p_connections(opcr, get_opcr_p2p_connections(*opcr) + 1);
 
     opcr[1] = *opcr;
     opcr[0] = old_opcr;
 
     ret = cmp_lock(fdtv, opcr_address, opcr);
     if (ret < 0)
         return ret;
 
     if (old_opcr != *opcr) {
         /*
          * FIXME: if old_opcr.P2P_Connections > 0,
          * deallocate isochronous channel and bandwidth at IRM
          */
 
         if (++attempts < 6) /* arbitrary limit */
             goto repeat;
         return -EBUSY;
     }
 
     return 0;
 }
 
 void cmp_break_pp_connection(struct firedtv *fdtv, int plug, int channel)
 {
     __be32 old_opcr, opcr[2];
     u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2);
     int attempts = 0;
 
     if (cmp_read(fdtv, opcr_address, opcr) < 0)
         return;
 
 repeat:
     if (!get_opcr_online(*opcr) || !get_opcr_p2p_connections(*opcr) ||
         get_opcr_channel(*opcr) != channel) {
         dev_err(fdtv->device, "CMP: no connection to break\n");
         return;
     }
 
     old_opcr = *opcr;
     set_opcr_p2p_connections(opcr, get_opcr_p2p_connections(*opcr) - 1);
 
     opcr[1] = *opcr;
     opcr[0] = old_opcr;
 
     if (cmp_lock(fdtv, opcr_address, opcr) < 0)
         return;
 
     if (old_opcr != *opcr) {
         /*
          * FIXME: if old_opcr.P2P_Connections == 1, i.e. we were last
          * owner, deallocate isochronous channel and bandwidth at IRM
          * if (...)
          *  fdtv->backend->dealloc_resources(fdtv, channel, bw);
          */
 
         if (++attempts < 6) /* arbitrary limit */
             goto repeat;
     }
 }

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