winckel
49cec160ff
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4683 818b1a75-f10b-46b9-bf7c-635c3b92a50f
179 lines
6.8 KiB
C
179 lines
6.8 KiB
C
/** openair0_lib : API to interface with ExpressMIMO-1&2 kernel driver
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*
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* Authors: Matthias Ihmig <matthias.ihmig@mytum.de>, 2013
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* Raymond Knopp <raymond.knopp@eurecom.fr>
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*
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* Changelog:
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* 28.01.2013: Initial version
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*/
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "openair0_lib.h"
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#include "openair_device.h"
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exmimo_pci_interface_bot_virtual_t openair0_exmimo_pci[MAX_CARDS]; // contains userspace pointers for each card
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char *bigshm_top[MAX_CARDS] = INIT_ZEROS;
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int openair0_fd;
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int openair0_num_antennas[MAX_CARDS];
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int openair0_num_detected_cards = 0;
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unsigned int PAGE_SHIFT;
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unsigned int log2_int( unsigned int x )
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{
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unsigned int ans = 0 ;
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while( x>>=1 ) ans++;
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return ans ;
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}
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int openair0_open(void)
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{
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exmimo_pci_interface_bot_virtual_t exmimo_pci_kvirt[MAX_CARDS];
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unsigned int bigshm_top_kvirtptr[MAX_CARDS];
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int card;
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int ant;
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PAGE_SHIFT = log2_int( sysconf( _SC_PAGESIZE ) );
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if ((openair0_fd = open("/dev/openair0", O_RDWR,0)) <0)
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{
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return -1;
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}
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ioctl(openair0_fd, openair_GET_NUM_DETECTED_CARDS, &openair0_num_detected_cards);
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if ( openair0_num_detected_cards == 0 )
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{
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fprintf(stderr, "No cards detected!\n");
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return -4;
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}
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ioctl(openair0_fd, openair_GET_BIGSHMTOPS_KVIRT, &bigshm_top_kvirtptr[0]);
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ioctl(openair0_fd, openair_GET_PCI_INTERFACE_BOTS_KVIRT, &exmimo_pci_kvirt[0]);
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//printf("bigshm_top_kvirtptr: %08x %08x %08x %08x\n", bigshm_top_kvirtptr[0], bigshm_top_kvirtptr[1], bigshm_top_kvirtptr[2], bigshm_top_kvirtptr[3]);
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for( card=0; card < openair0_num_detected_cards; card++)
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{
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bigshm_top[card] = (char *)mmap( NULL,
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BIGSHM_SIZE_PAGES<<PAGE_SHIFT,
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PROT_READ|PROT_WRITE,
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MAP_SHARED, //|MAP_FIXED,//MAP_SHARED,
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openair0_fd,
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( openair_mmap_BIGSHM | openair_mmap_Card(card) )<<PAGE_SHIFT);
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if (bigshm_top[card] == MAP_FAILED) {
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openair0_close();
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return -2;
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}
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// calculate userspace addresses
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openair0_exmimo_pci[card].firmware_block_ptr = (char*) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].firmware_block_ptr - bigshm_top_kvirtptr[card]);
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openair0_exmimo_pci[card].printk_buffer_ptr = (char*) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].printk_buffer_ptr - bigshm_top_kvirtptr[card]);
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openair0_exmimo_pci[card].exmimo_config_ptr = (exmimo_config_t*) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].exmimo_config_ptr - bigshm_top_kvirtptr[card]);
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openair0_exmimo_pci[card].exmimo_id_ptr = (exmimo_id_t*) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].exmimo_id_ptr - bigshm_top_kvirtptr[card]);
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/*printf("openair0_exmimo_pci.firmware_block_ptr (%p) = bigshm_top(%p) + exmimo_pci_kvirt.firmware_block_ptr(%p) - bigshm_top_kvirtptr(%x)\n",
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openair0_exmimo_pci.firmware_block_ptr, bigshm_top, exmimo_pci_kvirt.firmware_block_ptr, bigshm_top_kvirtptr);
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printf("card%d, openair0_exmimo_pci.exmimo_id_ptr (%p) = bigshm_top(%p) + exmimo_pci_kvirt.exmimo_id_ptr (%p) - bigshm_top_kvirtptr(%x)\n",
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card, openair0_exmimo_pci[card].exmimo_id_ptr, bigshm_top[card], exmimo_pci_kvirt[card].exmimo_id_ptr, bigshm_top_kvirtptr[card]);
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*/
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if ( openair0_exmimo_pci[card].exmimo_id_ptr->board_exmimoversion == 1)
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openair0_num_antennas[card] = 2;
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if ( openair0_exmimo_pci[card].exmimo_id_ptr->board_exmimoversion == 2)
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openair0_num_antennas[card] = 4;
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for (ant=0; ant<openair0_num_antennas[card]; ant++)
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{
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openair0_exmimo_pci[card].rxcnt_ptr[ant] = (unsigned int *) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].rxcnt_ptr[ant] - bigshm_top_kvirtptr[card]);
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openair0_exmimo_pci[card].txcnt_ptr[ant] = (unsigned int *) (bigshm_top[card] + (unsigned int)exmimo_pci_kvirt[card].txcnt_ptr[ant] - bigshm_top_kvirtptr[card]);
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}
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for (ant=0; ant<openair0_num_antennas[card]; ant++)
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{
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openair0_exmimo_pci[card].adc_head[ant] = mmap( NULL,
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ADAC_BUFFERSZ_PERCHAN_B,
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PROT_READ|PROT_WRITE,
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MAP_SHARED, //|MAP_FIXED,//MAP_SHARED,
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openair0_fd,
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( openair_mmap_RX(ant) | openair_mmap_Card(card) )<<PAGE_SHIFT );
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openair0_exmimo_pci[card].dac_head[ant] = mmap( NULL,
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ADAC_BUFFERSZ_PERCHAN_B,
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PROT_READ|PROT_WRITE,
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MAP_SHARED, //|MAP_FIXED,//MAP_SHARED,
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openair0_fd,
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( openair_mmap_TX(ant) | openair_mmap_Card(card) )<<PAGE_SHIFT );
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if (openair0_exmimo_pci[card].adc_head[ant] == MAP_FAILED || openair0_exmimo_pci[card].dac_head[ant] == MAP_FAILED) {
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openair0_close();
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return -3;
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}
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}
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//printf("p_exmimo_config = %p, p_exmimo_id = %p\n", openair0_exmimo_pci.exmimo_config_ptr, openair0_exmimo_pci.exmimo_id_ptr);
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printf("card %d: ExpressMIMO %d, HW Rev %d, SW Rev 0x%d, %d antennas\n", card, openair0_exmimo_pci[card].exmimo_id_ptr->board_exmimoversion,
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openair0_exmimo_pci[card].exmimo_id_ptr->board_hwrev, openair0_exmimo_pci[card].exmimo_id_ptr->board_swrev, openair0_num_antennas[card]);
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} // end for(card)
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return 0;
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}
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int openair0_close(void)
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{
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int ant;
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int card;
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close(openair0_fd);
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for (card=0; card<openair0_num_detected_cards; card++)
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{
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if (bigshm_top[card] != NULL && bigshm_top[card] != MAP_FAILED)
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munmap(bigshm_top[card], BIGSHM_SIZE_PAGES<<PAGE_SHIFT);
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for (ant=0; ant<openair0_num_antennas[card]; ant++)
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{
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if (openair0_exmimo_pci[card].adc_head[ant] != NULL && openair0_exmimo_pci[card].adc_head[ant] != MAP_FAILED)
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munmap(openair0_exmimo_pci[card].adc_head[ant], ADAC_BUFFERSZ_PERCHAN_B);
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if (openair0_exmimo_pci[card].dac_head[ant] != NULL && openair0_exmimo_pci[card].dac_head[ant] != MAP_FAILED)
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munmap(openair0_exmimo_pci[card].dac_head[ant], ADAC_BUFFERSZ_PERCHAN_B);
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}
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}
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return 0;
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}
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int openair0_dump_config(int card)
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{
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return ioctl(openair0_fd, openair_DUMP_CONFIG, card);
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}
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int openair0_get_frame(int card)
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{
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return ioctl(openair0_fd, openair_GET_FRAME, card);
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}
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int openair0_start_rt_acquisition(int card)
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{
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return ioctl(openair0_fd, openair_START_RT_ACQUISITION, card);
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}
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int openair0_stop(int card)
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{
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return ioctl(openair0_fd, openair_STOP, card);
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}
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