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path: root/drivers/media/dvb/firesat/cmp.c
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Diffstat (limited to 'drivers/media/dvb/firesat/cmp.c')
-rw-r--r--drivers/media/dvb/firesat/cmp.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/media/dvb/firesat/cmp.c b/drivers/media/dvb/firesat/cmp.c
new file mode 100644
index 00000000000..37b91f3f7ff
--- /dev/null
+++ b/drivers/media/dvb/firesat/cmp.c
@@ -0,0 +1,230 @@
+#include "cmp.h"
+#include <ieee1394.h>
+#include <nodemgr.h>
+#include <highlevel.h>
+#include <ohci1394.h>
+#include <hosts.h>
+#include <ieee1394_core.h>
+#include <ieee1394_transactions.h>
+#include "avc_api.h"
+
+typedef struct _OPCR
+{
+ BYTE PTPConnCount : 6 ; // Point to point connect. counter
+ BYTE BrConnCount : 1 ; // Broadcast connection counter
+ BYTE OnLine : 1 ; // On Line
+
+ BYTE ChNr : 6 ; // Channel number
+ BYTE Res : 2 ; // Reserved
+
+ BYTE PayloadHi : 2 ; // Payoad high bits
+ BYTE OvhdID : 4 ; // Overhead ID
+ BYTE DataRate : 2 ; // Data Rate
+
+ BYTE PayloadLo ; // Payoad low byte
+} OPCR ;
+
+#define FIRESAT_SPEED IEEE1394_SPEED_400
+
+/* hpsb_lock is being removed from the kernel-source,
+ * therefor we define our own 'firesat_hpsb_lock'*/
+
+int send_packet_and_wait(struct hpsb_packet *packet);
+
+int firesat_hpsb_lock(struct hpsb_host *host, nodeid_t node, unsigned int generation,
+ u64 addr, int extcode, quadlet_t * data, quadlet_t arg) {
+
+ struct hpsb_packet *packet;
+ int retval = 0;
+
+ BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
+
+ packet = hpsb_make_lockpacket(host, node, addr, extcode, data, arg);
+ if (!packet)
+ return -ENOMEM;
+
+ packet->generation = generation;
+ retval = send_packet_and_wait(packet);
+ if (retval < 0)
+ goto hpsb_lock_fail;
+
+ retval = hpsb_packet_success(packet);
+
+ if (retval == 0) {
+ *data = packet->data[0];
+ }
+
+ hpsb_lock_fail:
+ hpsb_free_tlabel(packet);
+ hpsb_free_packet(packet);
+
+ return retval;
+}
+
+
+static int cmp_read(struct firesat *firesat, void *buffer, u64 addr, size_t length) {
+ int ret;
+ if(down_interruptible(&firesat->avc_sem))
+ return -EINTR;
+
+ ret = hpsb_read(firesat->host, firesat->nodeentry->nodeid, firesat->nodeentry->generation,
+ addr, buffer, length);
+
+ up(&firesat->avc_sem);
+ return ret;
+}
+
+static int cmp_lock(struct firesat *firesat, quadlet_t *data, u64 addr, quadlet_t arg, int ext_tcode) {
+ int ret;
+ if(down_interruptible(&firesat->avc_sem))
+ return -EINTR;
+
+ ret = firesat_hpsb_lock(firesat->host, firesat->nodeentry->nodeid, firesat->nodeentry->generation,
+ addr, ext_tcode, data, arg);
+
+ up(&firesat->avc_sem);
+ return ret;
+}
+
+//try establishing a point-to-point connection (may be interrupted by a busreset
+int try_CMPEstablishPPconnection(struct firesat *firesat, int output_plug, int iso_channel) {
+ unsigned int BWU; //bandwidth to allocate
+
+ quadlet_t old_oPCR,test_oPCR = 0x0;
+ u64 oPCR_address=0xfffff0000904ull+(output_plug << 2);
+ int result=cmp_read(firesat, &test_oPCR, oPCR_address, 4);
+
+ printk(KERN_INFO "%s: nodeid = %d\n",__func__,firesat->nodeentry->nodeid);
+
+ if (result < 0) {
+ printk("%s: cannot read oPCR\n", __func__);
+ return result;
+ } else {
+ printk(KERN_INFO "%s: oPCR = %08x\n",__func__,test_oPCR);
+ do {
+ OPCR *hilf= (OPCR*) &test_oPCR;
+
+ if (!hilf->OnLine) {
+ printk("%s: Output offline; oPCR: %08x\n", __func__, test_oPCR);
+ return -EBUSY;
+ } else {
+ quadlet_t new_oPCR;
+
+ old_oPCR=test_oPCR;
+ if (hilf->PTPConnCount) {
+ if (hilf->ChNr != iso_channel) {
+ printk("%s: Output plug has already connection on channel %u; cannot change it to channel %u\n",__func__,hilf->ChNr,iso_channel);
+ return -EBUSY;
+ } else
+ printk(KERN_INFO "%s: Overlaying existing connection; connection counter was: %u\n",__func__, hilf->PTPConnCount);
+ BWU=0; //we allocate no bandwidth (is this necessary?)
+ } else {
+ hilf->ChNr=iso_channel;
+ hilf->DataRate=FIRESAT_SPEED;
+
+ hilf->OvhdID=0; //FIXME: that is for worst case -> optimize
+ BWU=hilf->OvhdID?hilf->OvhdID*32:512;
+ BWU += (hilf->PayloadLo + (hilf->PayloadHi << 8) +3) * (2 << (3-hilf->DataRate));
+/* if (allocate_1394_resources(iso_channel,BWU))
+ {
+ cout << "Allocation of resources failed\n";
+ return -2;
+ }*/
+ }
+
+ hilf->PTPConnCount++;
+ new_oPCR=test_oPCR;
+ printk(KERN_INFO "%s: trying compare_swap...\n",__func__);
+ printk(KERN_INFO "%s: oPCR_old: %08x, oPCR_new: %08x\n",__func__, old_oPCR, new_oPCR);
+ result=cmp_lock(firesat, &test_oPCR, oPCR_address, old_oPCR, 2);
+
+ if (result < 0) {
+ printk("%s: cannot compare_swap oPCR\n",__func__);
+ return result;
+ }
+ if ((old_oPCR != test_oPCR) && (!((OPCR*) &old_oPCR)->PTPConnCount))
+ {
+ printk("%s: change of oPCR failed -> freeing resources\n",__func__);
+// hilf= (OPCR*) &new_oPCR;
+// unsigned int BWU=hilf->OvhdID?hilf->OvhdID*32:512;
+// BWU += (hilf->Payload+3) * (2 << (3-hilf->DataRate));
+/* if (deallocate_1394_resources(iso_channel,BWU))
+ {
+
+ cout << "Deallocation of resources failed\n";
+ return -3;
+ }*/
+ }
+ }
+ }
+ while (old_oPCR != test_oPCR);
+ }
+ return 0;
+}
+
+//try breaking a point-to-point connection (may be interrupted by a busreset
+int try_CMPBreakPPconnection(struct firesat *firesat, int output_plug,int iso_channel) {
+ quadlet_t old_oPCR,test_oPCR;
+
+ u64 oPCR_address=0xfffff0000904ull+(output_plug << 2);
+ int result=cmp_read(firesat, &test_oPCR, oPCR_address, 4);
+
+ printk(KERN_INFO "%s\n",__func__);
+
+ if (result < 0) {
+ printk("%s: cannot read oPCR\n", __func__);
+ return result;
+ } else {
+ do {
+ OPCR *hilf= (OPCR*) &test_oPCR;
+
+ if (!hilf->OnLine || !hilf->PTPConnCount || hilf->ChNr != iso_channel) {
+ printk("%s: Output plug does not have PtP-connection on that channel; oPCR: %08x\n", __func__, test_oPCR);
+ return -EINVAL;
+ } else {
+ quadlet_t new_oPCR;
+ old_oPCR=test_oPCR;
+ hilf->PTPConnCount--;
+ new_oPCR=test_oPCR;
+
+// printk(KERN_INFO "%s: trying compare_swap...\n", __func__);
+ result=cmp_lock(firesat, &test_oPCR, oPCR_address, old_oPCR, 2);
+ if (result < 0) {
+ printk("%s: cannot compare_swap oPCR\n",__func__);
+ return result;
+ }
+ }
+
+ } while (old_oPCR != test_oPCR);
+
+/* hilf = (OPCR*) &old_oPCR;
+ if (hilf->PTPConnCount == 1) { // if we were the last owner of this connection
+ cout << "deallocating 1394 resources\n";
+ unsigned int BWU=hilf->OvhdID?hilf->OvhdID*32:512;
+ BWU += (hilf->PayloadLo + (hilf->PayloadHi << 8) +3) * (2 << (3-hilf->DataRate));
+ if (deallocate_1394_resources(iso_channel,BWU))
+ {
+ cout << "Deallocation of resources failed\n";
+ return -3;
+ }
+ }*/
+ }
+ return 0;
+}
+
+static void complete_packet(void *data) {
+ complete((struct completion *) data);
+}
+
+int send_packet_and_wait(struct hpsb_packet *packet) {
+ struct completion done;
+ int retval;
+
+ init_completion(&done);
+ hpsb_set_packet_complete_task(packet, complete_packet, &done);
+ retval = hpsb_send_packet(packet);
+ if (retval == 0)
+ wait_for_completion(&done);
+
+ return retval;
+}
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