[Qemu-arm] [RFC PATCH 2/4] net/ftgmac100: add a 'aspeed' property

["Cédric Le Goater" <clg@kaod.org>]

The Aspeed SoCs have a different definition of the end of the ring
buffer bit. Add a property to specify which set of bits should be used
by the NIC.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
---
 hw/net/ftgmac100.c         | 19 +++++++++++++++----
 include/hw/net/ftgmac100.h |  3 +++
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 4a7f865f226b..fceeffcb7a7f 100644
--- a/hw/net/ftgmac100.c
+++ b/hw/net/ftgmac100.c
@@ -112,6 +112,7 @@ struct ftgmac100_txdes {
 #define FTGMAC100_TXDES0_CRC_ERR         (1 << 19)
 #define FTGMAC100_TXDES0_LTS             (1 << 28)
 #define FTGMAC100_TXDES0_FTS             (1 << 29)
+#define FTGMAC100_TXDES0_EDOTR_ASPEED    (1 << 30)
 #define FTGMAC100_TXDES0_TXDMA_OWN       (1 << 31)
 
 #define FTGMAC100_TXDES1_VLANTAG_CI(x)   ((x) & 0xffff)
@@ -147,6 +148,7 @@ struct ftgmac100_rxdes {
 #define FTGMAC100_RXDES0_PAUSE_FRAME     (1 << 25)
 #define FTGMAC100_RXDES0_LRS             (1 << 28)
 #define FTGMAC100_RXDES0_FRS             (1 << 29)
+#define FTGMAC100_RXDES0_EDORR_ASPEED    (1 << 30)
 #define FTGMAC100_RXDES0_RXPKT_RDY       (1 << 31)
 
 #define FTGMAC100_RXDES1_VLANTAG_CI      0xffff
@@ -373,7 +375,7 @@ static uint32_t ftgmac100_find_txdes(Ftgmac100State *s, uint32_t addr)
 
     while (1) {
         ftgmac100_read_bd(&bd, addr);
-        if (bd.des0 & (FTGMAC100_TXDES0_FTS | FTGMAC100_TXDES0_EDOTR)) {
+        if (bd.des0 & (FTGMAC100_TXDES0_FTS | s->txdes0_edotr)) {
             break;
         }
         addr += sizeof(Ftgmac100Desc);
@@ -427,7 +429,7 @@ static void ftgmac100_do_tx(Ftgmac100State *s)
         /* Write back the modified descriptor.  */
         ftgmac100_write_bd(&bd, addr);
         /* Advance to the next descriptor.  */
-        if (bd.des0 & FTGMAC100_TXDES0_EDOTR) {
+        if (bd.des0 & s->txdes0_edotr) {
             addr = s->tx_ring;
         } else {
             addr += sizeof(Ftgmac100Desc);
@@ -448,7 +450,7 @@ static void ftgmac100_enable_rx(Ftgmac100State *s)
     while (1) {
         ftgmac100_read_bd(&bd, s->rx_descriptor);
         full = (bd.des0 & FTGMAC100_RXDES0_RXPKT_RDY);
-        if (!full || bd.des0 & FTGMAC100_TXDES0_EDOTR) {
+        if (!full || bd.des0 & s->txdes0_edotr) {
             break;
         }
         s->rx_descriptor += sizeof(Ftgmac100Desc);
@@ -739,7 +741,7 @@ static ssize_t ftgmac100_receive(NetClientState *nc, const uint8_t *buf,
             s->isr |= FTGMAC100_INT_RPKT_FIFO;
         }
         ftgmac100_write_bd(&bd, addr);
-        if (bd.des0 & FTGMAC100_RXDES0_EDORR) {
+        if (bd.des0 & s->rxdes0_edorr) {
             addr = s->rx_ring;
         } else {
             addr += sizeof(Ftgmac100Desc);
@@ -781,6 +783,14 @@ static void ftgmac100_realize(DeviceState *dev, Error **errp)
     Ftgmac100State *s = FTGMAC100(dev);
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 
+    if (s->aspeed) {
+        s->txdes0_edotr = FTGMAC100_TXDES0_EDOTR_ASPEED;
+        s->rxdes0_edorr = FTGMAC100_RXDES0_EDORR_ASPEED;
+    } else {
+        s->txdes0_edotr = FTGMAC100_TXDES0_EDOTR;
+        s->rxdes0_edorr = FTGMAC100_RXDES0_EDORR;
+    }
+
     memory_region_init_io(&s->iomem, OBJECT(dev), &ftgmac100_ops, s,
                           TYPE_FTGMAC100, 0x2000);
     sysbus_init_mmio(sbd, &s->iomem);
@@ -824,6 +834,7 @@ static const VMStateDescription vmstate_ftgmac100 = {
 };
 
 static Property ftgmac100_properties[] = {
+    DEFINE_PROP_BOOL("aspeed", Ftgmac100State, aspeed, false),
     DEFINE_NIC_PROPERTIES(Ftgmac100State, conf),
     DEFINE_PROP_END_OF_LIST(),
 };
diff --git a/include/hw/net/ftgmac100.h b/include/hw/net/ftgmac100.h
index 1aa22de9e450..7476011f0657 100644
--- a/include/hw/net/ftgmac100.h
+++ b/include/hw/net/ftgmac100.h
@@ -46,6 +46,9 @@ typedef struct Ftgmac100State {
     uint32_t phy_int;
     uint32_t phy_int_mask;
 
+    bool aspeed;
+    uint32_t txdes0_edotr;
+    uint32_t rxdes0_edorr;
 } Ftgmac100State;
 
 #endif
-- 
2.7.4