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xilinx_spips: Add automatic start support

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SPI has a mode where it automatically starts based on tx fifo
occupancy. Implemented.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: f4e9accb5de87b526fff6ed937f63278db76533b.1369117359.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2013-06-03 17:17:42 +01:00 committed by Peter Maydell
parent b5cd9143e7
commit e100f3be0c
1 changed files with 2 additions and 1 deletions
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3
hw/ssi/xilinx_spips.c
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@ -451,7 +451,8 @@ static void xilinx_spips_write(void *opaque, hwaddr addr,
}
s->regs[addr] = (s->regs[addr] & ~mask) | (value & mask);
no_reg_update:
if (man_start_com) {
if ((man_start_com && s->regs[R_CONFIG] & MAN_START_EN) ||
(fifo8_is_empty(&s->tx_fifo) && s->regs[R_CONFIG] & MAN_START_EN)) {
xilinx_spips_flush_txfifo(s);
}
xilinx_spips_update_ixr(s);