/usr/share/pcb/m4/bga.inc is in pcb-common 20110918-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | # BGA packages
# A. G. Major, 2000
# $1: canonical name
# $2: name on PCB
# $3: value
# $4: number of pins along outer edge
# $5: number of rows
#
define(`PKG_BGA',
`define(`XBLOCK', `$4')
define(`YBLOCK', `$5')
define(`PITCH', `50')
define(`DIAMETER', `25')
define(`NUMPINS', `eval(4*(XBLOCK-4)*YBLOCK)')
Element(0x00 "$1" "`$2'" "$3" 100 0 0 100 0x00)
(
forloop(`i', 0, eval(XBLOCK-1),
`forloop(`j', 0, eval(YBLOCK-1),
`PAD(eval(i*PITCH), eval(j*PITCH), eval(i*PITCH), eval(j*PITCH), DIAMETER, 1)'
`PAD(eval((XBLOCK+YBLOCK-j-1)*PITCH), eval(i*PITCH), eval((XBLOCK+YBLOCK-j-1)*PITCH), eval(i*PITCH), DIAMETER, 1)'
`PAD(eval((XBLOCK+YBLOCK-i-1)*PITCH), eval((XBLOCK+YBLOCK-j-1)*PITCH), eval((XBLOCK+YBLOCK-i-1)*PITCH), eval((XBLOCK+YBLOCK-j-1)*PITCH), DIAMETER, 1)'
`PAD(eval(j*PITCH), eval((XBLOCK+YBLOCK-i-1)*PITCH), eval(j*PITCH), eval((XBLOCK+YBLOCK-i-1)*PITCH), DIAMETER, 1)'
)'
)
ElementLine(eval(-PITCH/2) eval(-1*PITCH) eval((XBLOCK+YBLOCK)*PITCH) eval(-1*PITCH) 10)
ElementLine(eval((XBLOCK+YBLOCK)*PITCH) eval(-1*PITCH) eval((XBLOCK+YBLOCK)*PITCH) eval((XBLOCK+YBLOCK)*PITCH) 10)
ElementLine(eval(-1*PITCH) eval((XBLOCK+YBLOCK)*PITCH) eval((XBLOCK+YBLOCK)*PITCH) eval((XBLOCK+YBLOCK)*PITCH) 10)
ElementLine(eval(-1*PITCH) eval(-PITCH/2) eval(-1*PITCH) eval((XBLOCK+YBLOCK)*PITCH) 10)
ElementLine(eval(-PITCH/2) eval(-PITCH) eval(-PITCH/2) eval(-PITCH/2) 10)
ElementLine(eval(-PITCH) eval(-PITCH/2) eval(-PITCH/2) eval(-PITCH/2) 10)
Mark(eval((YBLOCK+1)*PITCH) eval((YBLOCK+1)*PITCH))
)')
# -------------------------------------------------------------------
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