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fet: different exit procedure for FRAM devices. 

This is a partial revert to 0e5c38231b.
We detect whether the chip is an FRAM device at exit, and use a
different reset type if it is. The referenced commit broke the RST pin
on older chips.
This commit is contained in:
Daniel Beer 2012-08-10 08:34:35 +12:00
parent 907ef86156
commit 4ab905751c
1 changed files with 9 additions and 4 deletions
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13
drivers/fet.c
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@ -768,12 +768,17 @@ static void fet_destroy(device_t dev_base)
{
struct fet_device *dev = (struct fet_device *)dev_base;
if (xfer(dev, C_RESET, NULL, 0, 3, FET_RESET_ALL, 0, 0) < 0)
/* The second argument to C_RESET is a boolean which specifies
* whether the chip should run or not. The final argument is
* also a boolean. Setting it non-zero is required to get the
* RST pin working on the G2231, but it must be zero on the
* FR5739, or else the value of the reset vector gets set to
* 0xffff at the start of the next JTAG session.
*/
if (xfer(dev, C_RESET, NULL, 0, 3, FET_RESET_ALL, 1,
!device_is_fram(dev_base)) < 0)
printc_err("fet: final reset failed\n");
if (xfer(dev, C_RUN, NULL, 0, 2, FET_RUN_FREE, 0) < 0)
printc_err("fet: failed to restart CPU\n");
if (xfer(dev, C_CLOSE, NULL, 0, 1, 0) < 0)
printc_err("fet: close command failed\n");