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path: root/drivers/media/dvb-core/dvb_ca_en50221.c
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Diffstat (limited to 'drivers/media/dvb-core/dvb_ca_en50221.c')
-rw-r--r--drivers/media/dvb-core/dvb_ca_en50221.c1056
1 files changed, 585 insertions, 471 deletions
diff --git a/drivers/media/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb-core/dvb_ca_en50221.c
index af694f2066a2..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];
@@ -340,39 +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;
- if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ / 10)) != 0)
+ ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ);
+ 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 */
@@ -392,47 +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.
@@ -444,9 +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;
@@ -457,70 +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? */
@@ -533,12 +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 */
@@ -546,26 +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;
}
}
@@ -574,14 +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.
*
@@ -590,26 +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
@@ -627,6 +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];
@@ -635,90 +649,118 @@ 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 + DVB_RINGBUFFER_PKTHDRSIZE)) {
+ if (buf_free < (sl->link_buf_size +
+ DVB_RINGBUFFER_PKTHDRSIZE)) {
status = -EAGAIN;
goto exit;
}
}
- /* check if there is data available */
- if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0)
- goto exit;
- if (!(status & STATUSREG_DA)) {
- /* no data */
- status = 0;
- goto exit;
- }
-
- /* read the amount of data */
- if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0)
- goto exit;
- bytes_read = status << 8;
- if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0)
- goto exit;
- bytes_read |= status;
-
- /* check it will fit */
- if (ebuf == NULL) {
- if (bytes_read > ca->slot_info[slot].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;
- 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;
- status = -EIO;
+ if (ca->pub->read_data &&
+ (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) {
+ if (!ebuf)
+ status = ca->pub->read_data(ca->pub, slot, buf,
+ sizeof(buf));
+ else
+ status = ca->pub->read_data(ca->pub, slot, buf, ecount);
+ if (status < 0)
+ return status;
+ bytes_read = status;
+ if (status == 0)
goto exit;
- }
} else {
- if (bytes_read > ecount) {
- pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n",
- ca->dvbdev->adapter->num);
- status = -EIO;
+ /* check if there is data available */
+ status = ca->pub->read_cam_control(ca->pub, slot,
+ CTRLIF_STATUS);
+ if (status < 0)
+ goto exit;
+ if (!(status & STATUSREG_DA)) {
+ /* no data */
+ status = 0;
goto exit;
}
- }
- /* fill the buffer */
- for (i = 0; i < bytes_read; i++) {
- /* read byte and check */
- if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0)
+ /* read the amount of data */
+ status = ca->pub->read_cam_control(ca->pub, slot,
+ CTRLIF_SIZE_HIGH);
+ if (status < 0)
goto exit;
+ bytes_read = status << 8;
+ status = ca->pub->read_cam_control(ca->pub, slot,
+ CTRLIF_SIZE_LOW);
+ if (status < 0)
+ goto exit;
+ bytes_read |= status;
+
+ /* check it will fit */
+ 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,
+ 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);
+ sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
+ status = -EIO;
+ goto exit;
+ }
+ } else {
+ if (bytes_read > ecount) {
+ pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n",
+ ca->dvbdev->adapter->num);
+ status = -EIO;
+ goto exit;
+ }
+ }
- /* OK, store it in the buffer */
- buf[i] = status;
- }
+ /* fill the buffer */
+ for (i = 0; i < bytes_read; i++) {
+ /* read byte and check */
+ status = ca->pub->read_cam_control(ca->pub, slot,
+ CTRLIF_DATA);
+ if (status < 0)
+ goto exit;
- /* check for read error (RE should now be 0) */
- if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0)
- goto exit;
- if (status & STATUSREG_RE) {
- ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT;
- status = -EIO;
- goto exit;
+ /* OK, store it in the buffer */
+ buf[i] = status;
+ }
+
+ /* check for read error (RE should now be 0) */
+ status = ca->pub->read_cam_control(ca->pub, slot,
+ CTRLIF_STATUS);
+ if (status < 0)
+ goto exit;
+ if (status & STATUSREG_RE) {
+ 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);
}
@@ -727,16 +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.
@@ -752,21 +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;
- /* 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)
+ if (ca->pub->write_data &&
+ (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.
+ */
+ 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)
@@ -777,12 +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 */
@@ -814,23 +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;
}
@@ -846,12 +902,9 @@ exitnowrite:
return status;
}
-
-
-/* ******************************************************************************** */
+/* ************************************************************************** */
/* EN50221 higher level functions */
-
/**
* dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down.
*
@@ -865,8 +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);
@@ -875,7 +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.
*
@@ -883,9 +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);
@@ -898,13 +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.
*
@@ -914,17 +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.
*
@@ -934,16 +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;
@@ -955,8 +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 */
/**
@@ -966,7 +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;
@@ -985,11 +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 */
@@ -1015,7 +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 */
}
@@ -1029,214 +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_INVALID;
- 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 */
/**
@@ -1266,15 +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);
@@ -1292,21 +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;
}
@@ -1320,7 +1417,6 @@ out_unlock:
return err;
}
-
/**
* Wrapper for ioctl implementation.
*
@@ -1337,7 +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.
*
@@ -1354,6 +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];
@@ -1364,7 +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;
@@ -1375,14 +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)
@@ -1401,15 +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;
@@ -1417,7 +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;
@@ -1432,7 +1536,6 @@ exit:
return status;
}
-
/**
* Condition for waking up in dvb_ca_en50221_io_read_condition
*/
@@ -1449,25 +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:
@@ -1479,7 +1585,6 @@ nextslot:
return found;
}
-
/**
* Implementation of read() syscall.
*
@@ -1495,6 +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];
@@ -1508,13 +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;
@@ -1530,7 +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) {
@@ -1540,21 +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;
}
@@ -1563,9 +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);
@@ -1583,7 +1696,6 @@ exit:
return status;
}
-
/**
* Implementation of file open syscall.
*
@@ -1611,12 +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);
}
}
}
@@ -1630,7 +1746,6 @@ static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file)
return 0;
}
-
/**
* Implementation of file close syscall.
*
@@ -1660,7 +1775,6 @@ static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file)
return err;
}
-
/**
* Implementation of poll() syscall.
*
@@ -1679,9 +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)
@@ -1690,14 +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,
@@ -1721,10 +1831,9 @@ static const struct dvb_device dvbdev_ca = {
.fops = &dvb_ca_fops,
};
-/* ******************************************************************************** */
+/* ************************************************************************** */
/* Initialisation/shutdown functions */
-
/**
* Initialise a new DVB CA EN50221 interface device.
*
@@ -1748,7 +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;
}
@@ -1756,7 +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;
}
@@ -1767,17 +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);
@@ -1809,9 +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.
@@ -1829,10 +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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.