diff options
Diffstat (limited to 'drivers/media/dvb-core/dvb_ca_en50221.c')
| -rw-r--r-- | drivers/media/dvb-core/dvb_ca_en50221.c | 945 |
1 files changed, 512 insertions, 433 deletions
diff --git a/drivers/media/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb-core/dvb_ca_en50221.c index 17970cdd55fa..95b3723282f4 100644 --- a/drivers/media/dvb-core/dvb_ca_en50221.c +++ b/drivers/media/dvb-core/dvb_ca_en50221.c @@ -76,8 +76,6 @@ MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); #define STATUSREG_WE 2 /* write error */ #define STATUSREG_FR 0x40 /* module free */ #define STATUSREG_DA 0x80 /* data available */ -#define STATUSREG_TXERR (STATUSREG_RE|STATUSREG_WE) /* general transfer error */ - #define DVB_CA_SLOTSTATE_NONE 0 #define DVB_CA_SLOTSTATE_UNINITIALISED 1 @@ -88,10 +86,8 @@ MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); #define DVB_CA_SLOTSTATE_WAITFR 6 #define DVB_CA_SLOTSTATE_LINKINIT 7 - /* Information on a CA slot */ struct dvb_ca_slot { - /* current state of the CAM */ int slot_state; @@ -157,7 +153,10 @@ struct dvb_ca_private { /* Delay the main thread should use */ unsigned long delay; - /* Slot to start looking for data to read from in the next user-space read operation */ + /* + * Slot to start looking for data to read from in the next user-space + * read operation + */ int next_read_slot; /* mutex serializing ioctls */ @@ -178,7 +177,9 @@ static void dvb_ca_private_free(struct dvb_ca_private *ca) static void dvb_ca_private_release(struct kref *ref) { - struct dvb_ca_private *ca = container_of(ref, struct dvb_ca_private, refcount); + struct dvb_ca_private *ca; + + ca = container_of(ref, struct dvb_ca_private, refcount); dvb_ca_private_free(ca); } @@ -198,7 +199,6 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 *ebuf, int ecount); - /** * Safely find needle in haystack. * @@ -223,25 +223,22 @@ static char *findstr(char *haystack, int hlen, char *needle, int nlen) return NULL; } - - -/* ******************************************************************************** */ +/* ************************************************************************** */ /* EN50221 physical interface functions */ - /** * dvb_ca_en50221_check_camstatus - Check CAM status. */ static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int slot_status; int cam_present_now; int cam_changed; /* IRQ mode */ - if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { - return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); - } + if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) + return (atomic_read(&sl->camchange_count) != 0); /* poll mode */ slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); @@ -249,29 +246,28 @@ static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; if (!cam_changed) { - int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); + int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE); + cam_changed = (cam_present_now != cam_present_old); } if (cam_changed) { - if (!cam_present_now) { - ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; - } else { - ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; - } - atomic_set(&ca->slot_info[slot].camchange_count, 1); + if (!cam_present_now) + sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; + else + sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; + atomic_set(&sl->camchange_count, 1); } else { - if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && + if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) && (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { - // move to validate state if reset is completed - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; + /* move to validate state if reset is completed */ + sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; } } return cam_changed; } - /** * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS * register on a CAM interface, checking for errors and timeout. @@ -295,8 +291,10 @@ static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, start = jiffies; timeout = jiffies + timeout_hz; while (1) { + int res; + /* read the status and check for error */ - int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); + res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); if (res < 0) return -EIO; @@ -308,12 +306,11 @@ static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, } /* check for timeout */ - if (time_after(jiffies, timeout)) { + if (time_after(jiffies, timeout)) break; - } /* wait for a bit */ - msleep(1); + usleep_range(1000, 1100); } dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); @@ -322,7 +319,6 @@ static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, return -ETIMEDOUT; } - /** * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. * @@ -333,6 +329,7 @@ static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, */ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int ret; int buf_size; u8 buf[2]; @@ -340,40 +337,54 @@ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) dprintk("%s\n", __func__); /* we'll be determining these during this function */ - ca->slot_info[slot].da_irq_supported = 0; + sl->da_irq_supported = 0; - /* set the host link buffer size temporarily. it will be overwritten with the - * real negotiated size later. */ - ca->slot_info[slot].link_buf_size = 2; + /* + * set the host link buffer size temporarily. it will be overwritten + * with the real negotiated size later. + */ + sl->link_buf_size = 2; /* read the buffer size from the CAM */ - if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) + ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, + IRQEN | CMDREG_SR); + if (ret) return ret; ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); - if (ret != 0) + if (ret) return ret; - if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) + ret = dvb_ca_en50221_read_data(ca, slot, buf, 2); + if (ret != 2) return -EIO; - if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) + ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); + if (ret) return ret; - /* store it, and choose the minimum of our buffer and the CAM's buffer size */ + /* + * store it, and choose the minimum of our buffer and the CAM's buffer + * size + */ buf_size = (buf[0] << 8) | buf[1]; if (buf_size > HOST_LINK_BUF_SIZE) buf_size = HOST_LINK_BUF_SIZE; - ca->slot_info[slot].link_buf_size = buf_size; + sl->link_buf_size = buf_size; buf[0] = buf_size >> 8; buf[1] = buf_size & 0xff; dprintk("Chosen link buffer size of %i\n", buf_size); /* write the buffer size to the CAM */ - if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) + ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, + IRQEN | CMDREG_SW); + if (ret) return ret; - if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) + ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10); + if (ret) return ret; - if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) + ret = dvb_ca_en50221_write_data(ca, slot, buf, 2); + if (ret != 2) return -EIO; - if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) + ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); + if (ret) return ret; /* success */ @@ -393,47 +404,50 @@ static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) * @return 0 on success, nonzero on error. */ static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, - int *address, int *tupleType, - int *tupleLength, u8 *tuple) + int *address, int *tuple_type, + int *tuple_length, u8 *tuple) { int i; - int _tupleType; - int _tupleLength; + int _tuple_type; + int _tuple_length; int _address = *address; /* grab the next tuple length and type */ - if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) - return _tupleType; - if (_tupleType == 0xff) { - dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); + _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address); + if (_tuple_type < 0) + return _tuple_type; + if (_tuple_type == 0xff) { + dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type); *address += 2; - *tupleType = _tupleType; - *tupleLength = 0; + *tuple_type = _tuple_type; + *tuple_length = 0; return 0; } - if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) - return _tupleLength; + _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot, + _address + 2); + if (_tuple_length < 0) + return _tuple_length; _address += 4; - dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); + dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length); /* read in the whole tuple */ - for (i = 0; i < _tupleLength; i++) { - tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); + for (i = 0; i < _tuple_length; i++) { + tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, + _address + (i * 2)); dprintk(" 0x%02x: 0x%02x %c\n", i, tuple[i] & 0xff, ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); } - _address += (_tupleLength * 2); + _address += (_tuple_length * 2); - // success - *tupleType = _tupleType; - *tupleLength = _tupleLength; + /* success */ + *tuple_type = _tuple_type; + *tuple_length = _tuple_length; *address = _address; return 0; } - /** * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, * extracting Config register, and checking it is a DVB CAM module. @@ -445,9 +459,10 @@ static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, */ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) { + struct dvb_ca_slot *sl; int address = 0; - int tupleLength; - int tupleType; + int tuple_length; + int tuple_type; u8 tuple[257]; char *dvb_str; int rasz; @@ -458,70 +473,66 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) u16 manfid = 0; u16 devid = 0; - - // CISTPL_DEVICE_0A - if ((status = - dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) + /* CISTPL_DEVICE_0A */ + status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, + &tuple_length, tuple); + if (status < 0) return status; - if (tupleType != 0x1D) + if (tuple_type != 0x1D) return -EINVAL; - - - // CISTPL_DEVICE_0C - if ((status = - dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) + /* CISTPL_DEVICE_0C */ + status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, + &tuple_length, tuple); + if (status < 0) return status; - if (tupleType != 0x1C) + if (tuple_type != 0x1C) return -EINVAL; - - - // CISTPL_VERS_1 - if ((status = - dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) + /* CISTPL_VERS_1 */ + status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, + &tuple_length, tuple); + if (status < 0) return status; - if (tupleType != 0x15) + if (tuple_type != 0x15) return -EINVAL; - - - // CISTPL_MANFID - if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, - &tupleLength, tuple)) < 0) + /* CISTPL_MANFID */ + status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, + &tuple_length, tuple); + if (status < 0) return status; - if (tupleType != 0x20) + if (tuple_type != 0x20) return -EINVAL; - if (tupleLength != 4) + if (tuple_length != 4) return -EINVAL; manfid = (tuple[1] << 8) | tuple[0]; devid = (tuple[3] << 8) | tuple[2]; - - - // CISTPL_CONFIG - if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, - &tupleLength, tuple)) < 0) + /* CISTPL_CONFIG */ + status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, + &tuple_length, tuple); + if (status < 0) return status; - if (tupleType != 0x1A) + if (tuple_type != 0x1A) return -EINVAL; - if (tupleLength < 3) + if (tuple_length < 3) return -EINVAL; /* extract the configbase */ rasz = tuple[0] & 3; - if (tupleLength < (3 + rasz + 14)) + if (tuple_length < (3 + rasz + 14)) return -EINVAL; - ca->slot_info[slot].config_base = 0; - for (i = 0; i < rasz + 1; i++) { - ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); - } + sl = &ca->slot_info[slot]; + sl->config_base = 0; + for (i = 0; i < rasz + 1; i++) + sl->config_base |= (tuple[2 + i] << (8 * i)); /* check it contains the correct DVB string */ - dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); - if (dvb_str == NULL) + dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8); + if (!dvb_str) return -EINVAL; - if (tupleLength < ((dvb_str - (char *) tuple) + 12)) + if (tuple_length < ((dvb_str - (char *)tuple) + 12)) return -EINVAL; /* is it a version we support? */ @@ -534,12 +545,14 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) /* process the CFTABLE_ENTRY tuples, and any after those */ while ((!end_chain) && (address < 0x1000)) { - if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, - &tupleLength, tuple)) < 0) + status = dvb_ca_en50221_read_tuple(ca, slot, &address, + &tuple_type, &tuple_length, + tuple); + if (status < 0) return status; - switch (tupleType) { - case 0x1B: // CISTPL_CFTABLE_ENTRY - if (tupleLength < (2 + 11 + 17)) + switch (tuple_type) { + case 0x1B: /* CISTPL_CFTABLE_ENTRY */ + if (tuple_length < (2 + 11 + 17)) break; /* if we've already parsed one, just use it */ @@ -547,26 +560,28 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) break; /* get the config option */ - ca->slot_info[slot].config_option = tuple[0] & 0x3f; + sl->config_option = tuple[0] & 0x3f; /* OK, check it contains the correct strings */ - if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || - (findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) + if (!findstr((char *)tuple, tuple_length, + "DVB_HOST", 8) || + !findstr((char *)tuple, tuple_length, + "DVB_CI_MODULE", 13)) break; got_cftableentry = 1; break; - case 0x14: // CISTPL_NO_LINK + case 0x14: /* CISTPL_NO_LINK */ break; - case 0xFF: // CISTPL_END + case 0xFF: /* CISTPL_END */ end_chain = 1; break; - default: /* Unknown tuple type - just skip this tuple and move to the next one */ + default: /* Unknown tuple type - just skip this tuple */ dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", - tupleType, tupleLength); + tuple_type, tuple_length); break; } } @@ -575,14 +590,12 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) return -EINVAL; dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", - manfid, devid, ca->slot_info[slot].config_base, - ca->slot_info[slot].config_option); + manfid, devid, sl->config_base, sl->config_option); - // success! + /* success! */ return 0; } - /** * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. * @@ -591,26 +604,25 @@ static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) */ static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int configoption; dprintk("%s\n", __func__); /* set the config option */ - ca->pub->write_attribute_mem(ca->pub, slot, - ca->slot_info[slot].config_base, - ca->slot_info[slot].config_option); + ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base, + sl->config_option); /* check it */ - configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); + configoption = ca->pub->read_attribute_mem(ca->pub, slot, + sl->config_base); dprintk("Set configoption 0x%x, read configoption 0x%x\n", - ca->slot_info[slot].config_option, configoption & 0x3f); + sl->config_option, configoption & 0x3f); /* fine! */ return 0; - } - /** * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control * interface. It reads a buffer of data from the CAM. The data can either @@ -628,6 +640,7 @@ static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 *ebuf, int ecount) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int bytes_read; int status; u8 buf[HOST_LINK_BUF_SIZE]; @@ -636,16 +649,16 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, dprintk("%s\n", __func__); /* check if we have space for a link buf in the rx_buffer */ - if (ebuf == NULL) { + if (!ebuf) { int buf_free; - if (ca->slot_info[slot].rx_buffer.data == NULL) { + if (!sl->rx_buffer.data) { status = -EIO; goto exit; } - buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); + buf_free = dvb_ringbuffer_free(&sl->rx_buffer); - if (buf_free < (ca->slot_info[slot].link_buf_size + + if (buf_free < (sl->link_buf_size + DVB_RINGBUFFER_PKTHDRSIZE)) { status = -EAGAIN; goto exit; @@ -653,8 +666,8 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, } if (ca->pub->read_data && - (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { - if (ebuf == NULL) + (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { + if (!ebuf) status = ca->pub->read_data(ca->pub, slot, buf, sizeof(buf)); else @@ -665,7 +678,6 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, if (status == 0) goto exit; } else { - /* check if there is data available */ status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); @@ -690,21 +702,19 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, bytes_read |= status; /* check it will fit */ - if (ebuf == NULL) { - if (bytes_read > ca->slot_info[slot].link_buf_size) { + if (!ebuf) { + if (bytes_read > sl->link_buf_size) { pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", ca->dvbdev->adapter->num, bytes_read, - ca->slot_info[slot].link_buf_size); - ca->slot_info[slot].slot_state = - DVB_CA_SLOTSTATE_LINKINIT; + sl->link_buf_size); + sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; status = -EIO; goto exit; } if (bytes_read < 2) { pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = - DVB_CA_SLOTSTATE_LINKINIT; + sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; status = -EIO; goto exit; } @@ -735,20 +745,22 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, if (status < 0) goto exit; if (status & STATUSREG_RE) { - ca->slot_info[slot].slot_state = - DVB_CA_SLOTSTATE_LINKINIT; + sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; status = -EIO; goto exit; } } - /* OK, add it to the receive buffer, or copy into external buffer if supplied */ - if (ebuf == NULL) { - if (ca->slot_info[slot].rx_buffer.data == NULL) { + /* + * OK, add it to the receive buffer, or copy into external buffer if + * supplied + */ + if (!ebuf) { + if (!sl->rx_buffer.data) { status = -EIO; goto exit; } - dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); + dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read); } else { memcpy(ebuf, buf, bytes_read); } @@ -757,16 +769,15 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, buf[0], (buf[1] & 0x80) == 0, bytes_read); /* wake up readers when a last_fragment is received */ - if ((buf[1] & 0x80) == 0x00) { + if ((buf[1] & 0x80) == 0x00) wake_up_interruptible(&ca->wait_queue); - } + status = bytes_read; exit: return status; } - /** * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control * interface. It writes a buffer of data to a CAM. @@ -782,25 +793,28 @@ exit: static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 *buf, int bytes_write) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int status; int i; dprintk("%s\n", __func__); - /* sanity check */ - if (bytes_write > ca->slot_info[slot].link_buf_size) + if (bytes_write > sl->link_buf_size) return -EINVAL; if (ca->pub->write_data && - (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) + (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) return ca->pub->write_data(ca->pub, slot, buf, bytes_write); - /* it is possible we are dealing with a single buffer implementation, - thus if there is data available for read or if there is even a read - already in progress, we do nothing but awake the kernel thread to - process the data if necessary. */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) + /* + * it is possible we are dealing with a single buffer implementation, + * thus if there is data available for read or if there is even a read + * already in progress, we do nothing but awake the kernel thread to + * process the data if necessary. + */ + status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); + if (status < 0) goto exitnowrite; if (status & (STATUSREG_DA | STATUSREG_RE)) { if (status & STATUSREG_DA) @@ -811,12 +825,14 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, } /* OK, set HC bit */ - if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, - IRQEN | CMDREG_HC)) != 0) + status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, + IRQEN | CMDREG_HC); + if (status) goto exit; /* check if interface is still free */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) + status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); + if (status < 0) goto exit; if (!(status & STATUSREG_FR)) { /* it wasn't free => try again later */ @@ -848,23 +864,29 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, } /* send the amount of data */ - if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) + status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, + bytes_write >> 8); + if (status) goto exit; - if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, - bytes_write & 0xff)) != 0) + status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, + bytes_write & 0xff); + if (status) goto exit; /* send the buffer */ for (i = 0; i < bytes_write; i++) { - if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) + status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, + buf[i]); + if (status) goto exit; } /* check for write error (WE should now be 0) */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) + status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); + if (status < 0) goto exit; if (status & STATUSREG_WE) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; + sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; status = -EIO; goto exit; } @@ -880,12 +902,9 @@ exitnowrite: return status; } - - -/* ******************************************************************************** */ +/* ************************************************************************** */ /* EN50221 higher level functions */ - /** * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. * @@ -899,8 +918,10 @@ static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) ca->pub->slot_shutdown(ca->pub, slot); ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; - /* need to wake up all processes to check if they're now - trying to write to a defunct CAM */ + /* + * need to wake up all processes to check if they're now trying to + * write to a defunct CAM + */ wake_up_interruptible(&ca->wait_queue); dprintk("Slot %i shutdown\n", slot); @@ -909,7 +930,6 @@ static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) return 0; } - /** * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. * @@ -917,9 +937,11 @@ static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) * @slot: Slot concerned. * @change_type: One of the DVB_CA_CAMCHANGE_* values. */ -void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) +void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, + int change_type) { struct dvb_ca_private *ca = pubca->private; + struct dvb_ca_slot *sl = &ca->slot_info[slot]; dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); @@ -932,13 +954,12 @@ void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int ch return; } - ca->slot_info[slot].camchange_type = change_type; - atomic_inc(&ca->slot_info[slot].camchange_count); + sl->camchange_type = change_type; + atomic_inc(&sl->camchange_count); dvb_ca_en50221_thread_wakeup(ca); } EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); - /** * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. * @@ -948,17 +969,17 @@ EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) { struct dvb_ca_private *ca = pubca->private; + struct dvb_ca_slot *sl = &ca->slot_info[slot]; dprintk("CAMREADY IRQ slot:%i\n", slot); - if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; + if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) { + sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; dvb_ca_en50221_thread_wakeup(ca); } } EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); - /** * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. * @@ -968,16 +989,17 @@ EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) { struct dvb_ca_private *ca = pubca->private; + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int flags; dprintk("FR/DA IRQ slot:%i\n", slot); - switch (ca->slot_info[slot].slot_state) { + switch (sl->slot_state) { case DVB_CA_SLOTSTATE_LINKINIT: flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); if (flags & STATUSREG_DA) { dprintk("CAM supports DA IRQ\n"); - ca->slot_info[slot].da_irq_supported = 1; + sl->da_irq_supported = 1; } break; @@ -989,8 +1011,7 @@ void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) } EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); - -/* ******************************************************************************** */ +/* ************************************************************************** */ /* EN50221 thread functions */ /** @@ -1000,7 +1021,6 @@ EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); */ static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) { - dprintk("%s\n", __func__); ca->wakeup = 1; @@ -1019,11 +1039,14 @@ static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) int curdelay = 100000000; int slot; - /* Beware of too high polling frequency, because one polling + /* + * Beware of too high polling frequency, because one polling * call might take several hundred milliseconds until timeout! */ for (slot = 0; slot < ca->slot_count; slot++) { - switch (ca->slot_info[slot].slot_state) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; + + switch (sl->slot_state) { default: case DVB_CA_SLOTSTATE_NONE: delay = HZ * 60; /* 60s */ @@ -1049,7 +1072,7 @@ static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) delay = HZ / 10; /* 100ms */ if (ca->open) { - if ((!ca->slot_info[slot].da_irq_supported) || + if ((!sl->da_irq_supported) || (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) delay = HZ / 10; /* 100ms */ } @@ -1063,215 +1086,250 @@ static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) ca->delay = curdelay; } +/** + * Poll if the CAM is gone. + * + * @ca: CA instance. + * @slot: Slot to process. + * @return: 0 .. no change + * 1 .. CAM state changed + */ +static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot) +{ + int changed = 0; + int status; + + /* + * we need this extra check for annoying interfaces like the + * budget-av + */ + if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && + (ca->pub->poll_slot_status)) { + status = ca->pub->poll_slot_status(ca->pub, slot, 0); + if (!(status & + DVB_CA_EN50221_POLL_CAM_PRESENT)) { + ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; + dvb_ca_en50221_thread_update_delay(ca); + changed = 1; + } + } + return changed; +} /** - * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. + * Thread state machine for one CA slot to perform the data transfer. + * + * @ca: CA instance. + * @slot: Slot to process. */ -static int dvb_ca_en50221_thread(void *data) +static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca, + int slot) { - struct dvb_ca_private *ca = data; - int slot; + struct dvb_ca_slot *sl = &ca->slot_info[slot]; int flags; - int status; int pktcount; void *rxbuf; - dprintk("%s\n", __func__); + mutex_lock(&sl->slot_lock); - /* choose the correct initial delay */ - dvb_ca_en50221_thread_update_delay(ca); + /* check the cam status + deal with CAMCHANGEs */ + while (dvb_ca_en50221_check_camstatus(ca, slot)) { + /* clear down an old CI slot if necessary */ + if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) + dvb_ca_en50221_slot_shutdown(ca, slot); - /* main loop */ - while (!kthread_should_stop()) { - /* sleep for a bit */ - if (!ca->wakeup) { - set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(ca->delay); - if (kthread_should_stop()) - return 0; + /* if a CAM is NOW present, initialise it */ + if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) + sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; + + /* we've handled one CAMCHANGE */ + dvb_ca_en50221_thread_update_delay(ca); + atomic_dec(&sl->camchange_count); + } + + /* CAM state machine */ + switch (sl->slot_state) { + case DVB_CA_SLOTSTATE_NONE: + case DVB_CA_SLOTSTATE_INVALID: + /* no action needed */ + break; + + case DVB_CA_SLOTSTATE_UNINITIALISED: + sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY; + ca->pub->slot_reset(ca->pub, slot); + sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); + break; + + case DVB_CA_SLOTSTATE_WAITREADY: + if (time_after(jiffies, sl->timeout)) { + pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); + break; } - ca->wakeup = 0; + /* + * no other action needed; will automatically change state when + * ready + */ + break; - /* go through all the slots processing them */ - for (slot = 0; slot < ca->slot_count; slot++) { + case DVB_CA_SLOTSTATE_VALIDATE: + if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { + if (dvb_ca_en50221_poll_cam_gone(ca, slot)) + break; - mutex_lock(&ca->slot_info[slot].slot_lock); + pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); + break; + } + if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { + pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); + break; + } + if (ca->pub->write_cam_control(ca->pub, slot, + CTRLIF_COMMAND, + CMDREG_RS) != 0) { + pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); + break; + } + dprintk("DVB CAM validated successfully\n"); - // check the cam status + deal with CAMCHANGEs - while (dvb_ca_en50221_check_camstatus(ca, slot)) { - /* clear down an old CI slot if necessary */ - if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) - dvb_ca_en50221_slot_shutdown(ca, slot); + sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); + sl->slot_state = DVB_CA_SLOTSTATE_WAITFR; + ca->wakeup = 1; + break; - /* if a CAM is NOW present, initialise it */ - if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; - } + case DVB_CA_SLOTSTATE_WAITFR: + if (time_after(jiffies, sl->timeout)) { + pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); + break; + } - /* we've handled one CAMCHANGE */ - dvb_ca_en50221_thread_update_delay(ca); - atomic_dec(&ca->slot_info[slot].camchange_count); - } + flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); + if (flags & STATUSREG_FR) { + sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; + ca->wakeup = 1; + } + break; - // CAM state machine - switch (ca->slot_info[slot].slot_state) { - case DVB_CA_SLOTSTATE_NONE: - case DVB_CA_SLOTSTATE_INVALID: - // no action needed + case DVB_CA_SLOTSTATE_LINKINIT: + if (dvb_ca_en50221_link_init(ca, slot) != 0) { + if (dvb_ca_en50221_poll_cam_gone(ca, slot)) break; - case DVB_CA_SLOTSTATE_UNINITIALISED: - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; - ca->pub->slot_reset(ca->pub, slot); - ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); - break; + pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; + dvb_ca_en50221_thread_update_delay(ca); + break; + } - case DVB_CA_SLOTSTATE_WAITREADY: - if (time_after(jiffies, ca->slot_info[slot].timeout)) { - pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - // no other action needed; will automatically change state when ready + if (!sl->rx_buffer.data) { + rxbuf = vmalloc(RX_BUFFER_SIZE); + if (!rxbuf) { + pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", + ca->dvbdev->adapter->num); + sl->slot_state = DVB_CA_SLOTSTATE_INVALID; + dvb_ca_en50221_thread_update_delay(ca); break; + } + dvb_ringbuffer_init(&sl->rx_buffer, rxbuf, + RX_BUFFER_SIZE); + } - case DVB_CA_SLOTSTATE_VALIDATE: - if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { - /* we need this extra check for annoying interfaces like the budget-av */ - if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && - (ca->pub->poll_slot_status)) { - status = ca->pub->poll_slot_status(ca->pub, slot, 0); - if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - } - - pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { - pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - if (ca->pub->write_cam_control(ca->pub, slot, - CTRLIF_COMMAND, CMDREG_RS) != 0) { - pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - dprintk("DVB CAM validated successfully\n"); - - ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; - ca->wakeup = 1; - break; + ca->pub->slot_ts_enable(ca->pub, slot); + sl->slot_state = DVB_CA_SLOTSTATE_RUNNING; + dvb_ca_en50221_thread_update_delay(ca); + pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", + ca->dvbdev->adapter->num); + break; - case DVB_CA_SLOTSTATE_WAITFR: - if (time_after(jiffies, ca->slot_info[slot].timeout)) { - pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - - flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); - if (flags & STATUSREG_FR) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; - ca->wakeup = 1; - } - break; + case DVB_CA_SLOTSTATE_RUNNING: + if (!ca->open) + break; - case DVB_CA_SLOTSTATE_LINKINIT: - if (dvb_ca_en50221_link_init(ca, slot) != 0) { - /* we need this extra check for annoying interfaces like the budget-av */ - if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && - (ca->pub->poll_slot_status)) { - status = ca->pub->poll_slot_status(ca->pub, slot, 0); - if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - } - - pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = - DVB_CA_SLOTSTATE_UNINITIALISED; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - - if (ca->slot_info[slot].rx_buffer.data == NULL) { - rxbuf = vmalloc(RX_BUFFER_SIZE); - if (rxbuf == NULL) { - pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; - dvb_ca_en50221_thread_update_delay(ca); - break; - } - dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); - } - - ca->pub->slot_ts_enable(ca->pub, slot); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; - dvb_ca_en50221_thread_update_delay(ca); - pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", - ca->dvbdev->adapter->num); + /* poll slots for data */ + pktcount = 0; + while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) { + if (!ca->open) break; - case DVB_CA_SLOTSTATE_RUNNING: - if (!ca->open) - break; - - // poll slots for data - pktcount = 0; - while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { - if (!ca->open) - break; - - /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ - if (dvb_ca_en50221_check_camstatus(ca, slot)) { - // we dont want to sleep on the next iteration so we can handle the cam change - ca->wakeup = 1; - break; - } - - /* check if we've hit our limit this time */ - if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { - // dont sleep; there is likely to be more data to read - ca->wakeup = 1; - break; - } - } + /* + * if a CAMCHANGE occurred at some point, do not do any + * more processing of this slot + */ + if (dvb_ca_en50221_check_camstatus(ca, slot)) { + /* + * we don't want to sleep on the next iteration + * so we can handle the cam change + */ + ca->wakeup = 1; break; } - mutex_unlock(&ca->slot_info[slot].slot_lock); + /* check if we've hit our limit this time */ + if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { + /* + * don't sleep; there is likely to be more data + * to read + */ + ca->wakeup = 1; + break; + } } + break; } - return 0; + mutex_unlock(&sl->slot_lock); } +/** + * Kernel thread which monitors CA slots for CAM changes, and performs data + * transfers. + */ +static int dvb_ca_en50221_thread(void *data) +{ + struct dvb_ca_private *ca = data; + int slot; + + dprintk("%s\n", __func__); + + /* choose the correct initial delay */ + dvb_ca_en50221_thread_update_delay(ca); + + /* main loop */ + while (!kthread_should_stop()) { + /* sleep for a bit */ + if (!ca->wakeup) { + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(ca->delay); + if (kthread_should_stop()) + return 0; + } + ca->wakeup = 0; + + /* go through all the slots processing them */ + for (slot = 0; slot < ca->slot_count; slot++) + dvb_ca_en50221_thread_state_machine(ca, slot); + } + return 0; +} -/* ******************************************************************************** */ +/* ************************************************************************** */ /* EN50221 IO interface functions */ /** @@ -1301,15 +1359,17 @@ static int dvb_ca_en50221_io_do_ioctl(struct file *file, switch (cmd) { case CA_RESET: for (slot = 0; slot < ca->slot_count; slot++) { - mutex_lock(&ca->slot_info[slot].slot_lock); - if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { + struct dvb_ca_slot *sl = &ca->slot_info[slot]; + + mutex_lock(&sl->slot_lock); + if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) { dvb_ca_en50221_slot_shutdown(ca, slot); if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) dvb_ca_en50221_camchange_irq(ca->pub, slot, DVB_CA_EN50221_CAMCHANGE_INSERTED); } - mutex_unlock(&ca->slot_info[slot].slot_lock); + mutex_unlock(&sl->slot_lock); } ca->next_read_slot = 0; dvb_ca_en50221_thread_wakeup(ca); @@ -1327,21 +1387,23 @@ static int dvb_ca_en50221_io_do_ioctl(struct file *file, case CA_GET_SLOT_INFO: { struct ca_slot_info *info = parg; + struct dvb_ca_slot *sl; - if ((info->num > ca->slot_count) || (info->num < 0)) { + slot = info->num; + if ((slot > ca->slot_count) || (slot < 0)) { err = -EINVAL; goto out_unlock; } info->type = CA_CI_LINK; info->flags = 0; - if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) - && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { + sl = &ca->slot_info[slot]; + if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) && + (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) { info->flags = CA_CI_MODULE_PRESENT; } - if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { + if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) info->flags |= CA_CI_MODULE_READY; - } break; } @@ -1355,7 +1417,6 @@ out_unlock: return err; } - /** * Wrapper for ioctl implementation. * @@ -1372,7 +1433,6 @@ static long dvb_ca_en50221_io_ioctl(struct file *file, return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); } - /** * Implementation of write() syscall. * @@ -1389,6 +1449,7 @@ static ssize_t dvb_ca_en50221_io_write(struct file *file, { struct dvb_device *dvbdev = file->private_data; struct dvb_ca_private *ca = dvbdev->priv; + struct dvb_ca_slot *sl; u8 slot, connection_id; int status; u8 fragbuf[HOST_LINK_BUF_SIZE]; @@ -1399,7 +1460,10 @@ static ssize_t dvb_ca_en50221_io_write(struct file *file, dprintk("%s\n", __func__); - /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ + /* + * Incoming packet has a 2 byte header. + * hdr[0] = slot_id, hdr[1] = connection_id + */ if (count < 2) return -EINVAL; @@ -1410,14 +1474,15 @@ static ssize_t dvb_ca_en50221_io_write(struct file *file, return -EFAULT; buf += 2; count -= 2; + sl = &ca->slot_info[slot]; /* check if the slot is actually running */ - if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) + if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) return -EINVAL; /* fragment the packets & store in the buffer */ while (fragpos < count) { - fraglen = ca->slot_info[slot].link_buf_size - 2; + fraglen = sl->link_buf_size - 2; if (fraglen < 0) break; if (fraglen > HOST_LINK_BUF_SIZE - 2) @@ -1436,15 +1501,19 @@ static ssize_t dvb_ca_en50221_io_write(struct file *file, timeout = jiffies + HZ / 2; written = 0; while (!time_after(jiffies, timeout)) { - /* check the CAM hasn't been removed/reset in the meantime */ - if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { + /* + * check the CAM hasn't been removed/reset in the + * meantime + */ + if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) { status = -EIO; goto exit; } - mutex_lock(&ca->slot_info[slot].slot_lock); - status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); - mutex_unlock(&ca->slot_info[slot].slot_lock); + mutex_lock(&sl->slot_lock); + status = dvb_ca_en50221_write_data(ca, slot, fragbuf, + fraglen + 2); + mutex_unlock(&sl->slot_lock); if (status == (fraglen + 2)) { written = 1; break; @@ -1452,7 +1521,7 @@ static ssize_t dvb_ca_en50221_io_write(struct file *file, if (status != -EAGAIN) goto exit; - msleep(1); + usleep_range(1000, 1100); } if (!written) { status = -EIO; @@ -1467,7 +1536,6 @@ exit: return status; } - /** * Condition for waking up in dvb_ca_en50221_io_read_condition */ @@ -1484,25 +1552,28 @@ static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, slot = ca->next_read_slot; while ((slot_count < ca->slot_count) && (!found)) { - if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) + struct dvb_ca_slot *sl = &ca->slot_info[slot]; + + if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) goto nextslot; - if (ca->slot_info[slot].rx_buffer.data == NULL) { + if (!sl->rx_buffer.data) return 0; - } - idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); + idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); while (idx != -1) { - dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); + dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); if (connection_id == -1) connection_id = hdr[0]; - if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { + if ((hdr[0] == connection_id) && + ((hdr[1] & 0x80) == 0)) { *_slot = slot; found = 1; break; } - idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); + idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, + &fraglen); } nextslot: @@ -1514,7 +1585,6 @@ nextslot: return found; } - /** * Implementation of read() syscall. * @@ -1530,6 +1600,7 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, { struct dvb_device *dvbdev = file->private_data; struct dvb_ca_private *ca = dvbdev->priv; + struct dvb_ca_slot *sl; int status; int result = 0; u8 hdr[2]; @@ -1543,13 +1614,16 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, dprintk("%s\n", __func__); - /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ + /* + * Outgoing packet has a 2 byte header. + * hdr[0] = slot_id, hdr[1] = connection_id + */ if (count < 2) return -EINVAL; /* wait for some data */ - if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { - + status = dvb_ca_en50221_io_read_condition(ca, &result, &slot); + if (status == 0) { /* if we're in nonblocking mode, exit immediately */ if (file->f_flags & O_NONBLOCK) return -EWOULDBLOCK; @@ -1565,7 +1639,8 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, return status; } - idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); + sl = &ca->slot_info[slot]; + idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); pktlen = 2; do { if (idx == -1) { @@ -1575,21 +1650,24 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, goto exit; } - dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); + dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); if (connection_id == -1) connection_id = hdr[0]; if (hdr[0] == connection_id) { if (pktlen < count) { - if ((pktlen + fraglen - 2) > count) { + if ((pktlen + fraglen - 2) > count) fraglen = count - pktlen; - } else { + else fraglen -= 2; - } - if ((status = dvb_ringbuffer_pkt_read_user(&ca->slot_info[slot].rx_buffer, idx, 2, - buf + pktlen, fraglen)) < 0) { + status = + dvb_ringbuffer_pkt_read_user(&sl->rx_buffer, + idx, 2, + buf + pktlen, + fraglen); + if (status < 0) goto exit; - } + pktlen += fraglen; } @@ -1598,9 +1676,9 @@ static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, dispose = 1; } - idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); + idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen); if (dispose) - dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); + dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx); idx = idx2; dispose = 0; } while (!last_fragment); @@ -1618,7 +1696,6 @@ exit: return status; } - /** * Implementation of file open syscall. * @@ -1646,12 +1723,16 @@ static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) } for (i = 0; i < ca->slot_count; i++) { - - if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { - if (ca->slot_info[i].rx_buffer.data != NULL) { - /* it is safe to call this here without locks because - * ca->open == 0. Data is not read in this case */ - dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); + struct dvb_ca_slot *sl = &ca->slot_info[i]; + + if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) { + if (!sl->rx_buffer.data) { + /* + * it is safe to call this here without locks + * because ca->open == 0. Data is not read in + * this case + */ + dvb_ringbuffer_flush(&sl->rx_buffer); } } } @@ -1665,7 +1746,6 @@ static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) return 0; } - /** * Implementation of file close syscall. * @@ -1695,7 +1775,6 @@ static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) return err; } - /** * Implementation of poll() syscall. * @@ -1714,9 +1793,8 @@ static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) dprintk("%s\n", __func__); - if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { + if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) mask |= POLLIN; - } /* if there is something, return now */ if (mask) @@ -1725,14 +1803,11 @@ static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) /* wait for something to happen */ poll_wait(file, &ca->wait_queue, wait); - if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { + if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) mask |= POLLIN; - } return mask; } -EXPORT_SYMBOL(dvb_ca_en50221_init); - static const struct file_operations dvb_ca_fops = { .owner = THIS_MODULE, @@ -1756,10 +1831,9 @@ static const struct dvb_device dvbdev_ca = { .fops = &dvb_ca_fops, }; -/* ******************************************************************************** */ +/* ************************************************************************** */ /* Initialisation/shutdown functions */ - /** * Initialise a new DVB CA EN50221 interface device. * @@ -1783,7 +1857,8 @@ int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, return -EINVAL; /* initialise the system data */ - if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { + ca = kzalloc(sizeof(*ca), GFP_KERNEL); + if (!ca) { ret = -ENOMEM; goto exit; } @@ -1791,7 +1866,9 @@ int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, ca->pub = pubca; ca->flags = flags; ca->slot_count = slot_count; - if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { + ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), + GFP_KERNEL); + if (!ca->slot_info) { ret = -ENOMEM; goto free_ca; } @@ -1802,17 +1879,20 @@ int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, pubca->private = ca; /* register the DVB device */ - ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA, 0); + ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, + DVB_DEVICE_CA, 0); if (ret) goto free_slot_info; /* now initialise each slot */ for (i = 0; i < slot_count; i++) { - memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); - ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; - atomic_set(&ca->slot_info[i].camchange_count, 0); - ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; - mutex_init(&ca->slot_info[i].slot_lock); + struct dvb_ca_slot *sl = &ca->slot_info[i]; + + memset(sl, 0, sizeof(struct dvb_ca_slot)); + sl->slot_state = DVB_CA_SLOTSTATE_NONE; + atomic_set(&sl->camchange_count, 0); + sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; + mutex_init(&sl->slot_lock); } mutex_init(&ca->ioctl_mutex); @@ -1844,9 +1924,7 @@ exit: pubca->private = NULL; return ret; } -EXPORT_SYMBOL(dvb_ca_en50221_release); - - +EXPORT_SYMBOL(dvb_ca_en50221_init); /** * Release a DVB CA EN50221 interface device. @@ -1864,10 +1942,11 @@ void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) /* shutdown the thread if there was one */ kthread_stop(ca->thread); - for (i = 0; i < ca->slot_count; i++) { + for (i = 0; i < ca->slot_count; i++) dvb_ca_en50221_slot_shutdown(ca, i); - } + dvb_remove_device(ca->dvbdev); dvb_ca_private_put(ca); pubca->private = NULL; } +EXPORT_SYMBOL(dvb_ca_en50221_release); |