diff options
Diffstat (limited to 'bsps/powerpc/shared/pci/pcifinddevice.c')
| -rw-r--r-- | bsps/powerpc/shared/pci/pcifinddevice.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/bsps/powerpc/shared/pci/pcifinddevice.c b/bsps/powerpc/shared/pci/pcifinddevice.c new file mode 100644 index 0000000000..8aad50547a --- /dev/null +++ b/bsps/powerpc/shared/pci/pcifinddevice.c @@ -0,0 +1,212 @@ +/* find a particular PCI device + * (we assume, the firmware configured the PCI bus[es] for us) + */ + +/* + * Authorship + * ---------- + * This software was created by + * Till Straumann <strauman@slac.stanford.edu>, 2001, + * Stanford Linear Accelerator Center, Stanford University. + * + * Acknowledgement of sponsorship + * ------------------------------ + * This software was produced by + * the Stanford Linear Accelerator Center, Stanford University, + * under Contract DE-AC03-76SFO0515 with the Department of Energy. + * + * Government disclaimer of liability + * ---------------------------------- + * Neither the United States nor the United States Department of Energy, + * nor any of their employees, makes any warranty, express or implied, or + * assumes any legal liability or responsibility for the accuracy, + * completeness, or usefulness of any data, apparatus, product, or process + * disclosed, or represents that its use would not infringe privately owned + * rights. + * + * Stanford disclaimer of liability + * -------------------------------- + * Stanford University makes no representations or warranties, express or + * implied, nor assumes any liability for the use of this software. + * + * Stanford disclaimer of copyright + * -------------------------------- + * Stanford University, owner of the copyright, hereby disclaims its + * copyright and all other rights in this software. Hence, anyone may + * freely use it for any purpose without restriction. + * + * Maintenance of notices + * ---------------------- + * In the interest of clarity regarding the origin and status of this + * SLAC software, this and all the preceding Stanford University notices + * are to remain affixed to any copy or derivative of this software made + * or distributed by the recipient and are to be affixed to any copy of + * software made or distributed by the recipient that contains a copy or + * derivative of this software. + * + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 + */ + +#include <inttypes.h> +#include <bsp/pci.h> +#include <rtems/bspIo.h> +#include <stdio.h> + +/* Stolen from i386... */ + +/* + * Make device signature from bus number, device number and function + * number + */ +#define PCIB_DEVSIG_MAKE(b,d,f) ((b<<8)|(d<<3)|(f)) + +/* + * Extract various parts from device signature + */ +#define PCIB_DEVSIG_BUS(x) (((x)>>8) &0xff) +#define PCIB_DEVSIG_DEV(x) (((x)>>3) & 0x1f) +#define PCIB_DEVSIG_FUNC(x) ((x) & 0x7) + +typedef struct { + unsigned short vid,did; + int inst; +} fd_arg; + +static int +find_dev_cb( + int bus, + int dev, + int fun, + void *uarg +) { +fd_arg *a = uarg; +unsigned short s; + + pci_read_config_word(bus,dev,fun,PCI_VENDOR_ID,&s); + if (a->vid == s) { + pci_read_config_word(bus,dev,fun,PCI_DEVICE_ID,&s); + if (a->did == s && 0 == a->inst-- ) { + a->inst = PCIB_DEVSIG_MAKE( bus, dev, fun ); + return 1; + } + } + return 0; +} + +int +pci_find_device( + unsigned short vendorid, + unsigned short deviceid, + int instance, + int *pbus, + int *pdev, + int *pfun +) { +fd_arg a; +void *h; + a.vid = vendorid; + a.did = deviceid; + a.inst = instance; + + if ( (h = BSP_pciScan(0, find_dev_cb, (void*)&a)) ) { + *pbus = PCIB_DEVSIG_BUS( a.inst ); + *pdev = PCIB_DEVSIG_DEV( a.inst ); + *pfun = PCIB_DEVSIG_FUNC( a.inst ); + return 0; + } + return -1; +} + +static int +dump_dev_cb( + int bus, + int dev, + int fun, + void *uarg +) +{ + uint16_t vi,di; + uint16_t cd,st; + uint32_t b1,b2; + uint8_t il,ip; + FILE *f = uarg; + + pci_read_config_word (bus, dev, fun, PCI_VENDOR_ID, &vi); + pci_read_config_word (bus, dev, fun, PCI_DEVICE_ID, &di); + pci_read_config_word (bus, dev, fun, PCI_COMMAND, &cd); + pci_read_config_word (bus, dev, fun, PCI_STATUS, &st); + pci_read_config_dword(bus, dev, fun, PCI_BASE_ADDRESS_0, &b1); + pci_read_config_dword(bus, dev, fun, PCI_BASE_ADDRESS_1, &b2); + pci_read_config_byte (bus, dev, fun, PCI_INTERRUPT_LINE, &il); + pci_read_config_byte (bus, dev, fun, PCI_INTERRUPT_PIN, &ip); + + /* fprintf(f,"%3d:0x%02x:%d 0x%04x-0x%04x: 0x%04x 0x%04x 0x%08x 0x%08x %d -> %3d (=0x%02x)\n", */ + fprintf(f,"%3d:0x%02x:%d 0x%04x-0x%04x: 0x%04x 0x%04x 0x%08" PRIx32 " 0x%08" PRIx32 " %d -> %3d (=0x%02x)\n", + bus, dev, fun, vi, di, cd, st, b1, b2, ip, il, il); + return 0; +} + +void +BSP_pciConfigDump(FILE *f) +{ + if ( !f ) + f = stdout; + fprintf(f,"BUS:SLOT:FUN VENDOR-DEV_ID: COMMAND STATUS BASE_ADDR0 BASE_ADDR1 IRQ_PIN -> IRQ_LINE\n"); + BSP_pciScan(0, dump_dev_cb, f); +} + +BSP_PciScanHandle +BSP_pciScan( + BSP_PciScanHandle handle, + BSP_PciScannerCb cb, + void *uarg +) { + + uint32_t d; + unsigned char bus,dev,fun,hd; + + bus = PCIB_DEVSIG_BUS( (unsigned long)handle ); + dev = PCIB_DEVSIG_DEV( (unsigned long)handle ); + fun = PCIB_DEVSIG_FUNC( (unsigned long)handle ); + + hd = fun > 0 ? PCI_MAX_FUNCTIONS : 1; + + for (; bus<pci_bus_count(); bus++, dev=0) { + for (; dev<PCI_MAX_DEVICES; dev++, fun=0) { + for (; fun<hd; fun++) { + /* + * The last devfn id/slot is special; must skip it + */ + if (PCI_MAX_DEVICES-1==dev && PCI_MAX_FUNCTIONS-1 == fun) + break; + + (void)pci_read_config_dword(bus,dev,0,PCI_VENDOR_ID,&d); + if (PCI_INVALID_VENDORDEVICEID == d) + continue; + + if ( 0 == fun ) { + pci_read_config_byte(bus,dev,0, PCI_HEADER_TYPE, &hd); + hd = (hd & PCI_HEADER_TYPE_MULTI_FUNCTION ? PCI_MAX_FUNCTIONS : 1); + } + + (void)pci_read_config_dword(bus,dev,fun,PCI_VENDOR_ID,&d); + if (PCI_INVALID_VENDORDEVICEID == d) + continue; +#ifdef PCI_DEBUG + printk("BSP_pciScan: found 0x%08x at %d/x%02x/%d\n",d,bus,dev,fun); +#endif + if ( cb(bus,dev,fun,uarg) > 0 ) { + if ( ++fun >= hd ) { + fun = 0; + if ( ++dev >= PCI_MAX_DEVICES ) { + dev = 0; + bus++; + } + } + return (void*) PCIB_DEVSIG_MAKE(bus,dev,fun); + } + } + } + } + return 0; +} |