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ARM: orion5x: use safer FPGA ID 'default' for TS-78xx 

Originally the FPGA ID checking switch statement left disabled all the
TS implemented FPGA devices if the ID was unknown to it.  Michael Spang
created a fix in f9b1184e that changed the default to enable the devices
in the event TS silently release more revisions into the wild, this
unfortunately breaks custom FPGA bitstreams.

This patch amends the switch statement so that the TS devices are only
enabled if on the revision number is unknown (whilst the magic matches).

Changelog:
 v2: neater implementation and some cosmetic changes
 v1: initial release <20110305112937.GA22117@chipmunk>

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
This commit is contained in:
Alexander Clouter 2011-03-05 11:49:36 +00:00 committed by Nicolas Pitre
parent f9b1184e12
commit b388233084
2 changed files with 24 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/arm/mach-orion5x/ts78xx-fpga.h
View File

@ -1,3 +1,4 @@
#define TS7800_FPGA_MAGIC 0x00b480
#define FPGAID(_magic, _rev) ((_magic << 8) + _rev)
/*
@ -6,15 +7,15 @@
*/
enum fpga_ids {
/* Technologic Systems */
TS7800_REV_1 = FPGAID(0x00b480, 0x01),
TS7800_REV_2 = FPGAID(0x00b480, 0x02),
TS7800_REV_3 = FPGAID(0x00b480, 0x03),
TS7800_REV_4 = FPGAID(0x00b480, 0x04),
TS7800_REV_5 = FPGAID(0x00b480, 0x05),
TS7800_REV_6 = FPGAID(0x00b480, 0x06),
TS7800_REV_7 = FPGAID(0x00b480, 0x07),
TS7800_REV_8 = FPGAID(0x00b480, 0x08),
TS7800_REV_9 = FPGAID(0x00b480, 0x09),
TS7800_REV_1 = FPGAID(TS7800_FPGA_MAGIC, 0x01),
TS7800_REV_2 = FPGAID(TS7800_FPGA_MAGIC, 0x02),
TS7800_REV_3 = FPGAID(TS7800_FPGA_MAGIC, 0x03),
TS7800_REV_4 = FPGAID(TS7800_FPGA_MAGIC, 0x04),
TS7800_REV_5 = FPGAID(TS7800_FPGA_MAGIC, 0x05),
TS7800_REV_6 = FPGAID(TS7800_FPGA_MAGIC, 0x06),
TS7800_REV_7 = FPGAID(TS7800_FPGA_MAGIC, 0x07),
TS7800_REV_8 = FPGAID(TS7800_FPGA_MAGIC, 0x08),
TS7800_REV_9 = FPGAID(TS7800_FPGA_MAGIC, 0x09),
/* Unaffordable & Expensive */
UAE_DUMMY = FPGAID(0xffffff, 0x01),

19
arch/arm/mach-orion5x/ts78xx-setup.c
View File

@ -399,11 +399,20 @@ static void ts78xx_fpga_supports(void)
ts78xx_fpga.supports.ts_rng.present = 1;
break;
default:
printk(KERN_WARNING "Unrecognized TS-78XX FPGA ID 0x%02x",
ts78xx_fpga.id);
ts78xx_fpga.supports.ts_rtc.present = 1;
ts78xx_fpga.supports.ts_nand.present = 1;
ts78xx_fpga.supports.ts_rng.present = 1;
/* enable devices if magic matches */
switch ((ts78xx_fpga.id >> 8) & 0xffffff) {
case TS7800_FPGA_MAGIC:
printk(KERN_WARNING "TS-7800 FPGA: unrecognized revision 0x%.2x\n",
ts78xx_fpga.id & 0xff);
ts78xx_fpga.supports.ts_rtc.present = 1;
ts78xx_fpga.supports.ts_nand.present = 1;
ts78xx_fpga.supports.ts_rng.present = 1;
break;
default:
ts78xx_fpga.supports.ts_rtc.present = 0;
ts78xx_fpga.supports.ts_nand.present = 0;
ts78xx_fpga.supports.ts_rng.present = 0;
}
}
}