diff mbox

[PULL,10/11] ast2400: pretend DMAs are done for U-boot

Message ID 1468513783-25449-11-git-send-email-peter.maydell@linaro.org
State New
Headers show

Commit Message

Peter Maydell July 14, 2016, 4:29 p.m. UTC 
From: Cédric Le Goater <clg@kaod.org>

U-boot does SPI timing calibration using DMA tranfers. To let the
initialization continue, we fake success by setting the DMA status of
the Interrupt Control Register.

For the moment, DMA support is not required as it is not used in
normal operation.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-id: 1467994016-11678-4-git-send-email-clg@kaod.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/ssi/aspeed_smc.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index 854474b..d319e04 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -273,6 +273,9 @@  static void aspeed_smc_reset(DeviceState *d)
 
     memset(s->regs, 0, sizeof s->regs);
 
+    /* Pretend DMA is done (u-boot initialization) */
+    s->regs[R_INTR_CTRL] = INTR_CTRL_DMA_STATUS;
+
     /* Unselect all slaves */
     for (i = 0; i < s->num_cs; ++i) {
         s->regs[s->r_ctrl0 + i] |= CTRL_CE_STOP_ACTIVE;
@@ -297,6 +300,7 @@  static uint64_t aspeed_smc_read(void *opaque, hwaddr addr, unsigned int size)
     if (addr == s->r_conf ||
         addr == s->r_timings ||
         addr == s->r_ce_ctrl ||
+        addr == R_INTR_CTRL ||
         (addr >= s->r_ctrl0 && addr < s->r_ctrl0 + s->num_cs)) {
         return s->regs[addr];
     } else {