mv643xx_eth: detect alternate TX BW control register location
Some SoCs have the TX bandwidth control registers in a slightly
different place. This patch detects that case at run time, and
re-directs accesses to those registers to the proper place at
run time if needed.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 296687b..72d3f36 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -108,6 +108,10 @@
#define INT_MASK(p) (0x0468 + ((p) << 10))
#define INT_MASK_EXT(p) (0x046c + ((p) << 10))
#define TX_FIFO_URGENT_THRESHOLD(p) (0x0474 + ((p) << 10))
+#define TXQ_FIX_PRIO_CONF_MOVED(p) (0x04dc + ((p) << 10))
+#define TX_BW_RATE_MOVED(p) (0x04e0 + ((p) << 10))
+#define TX_BW_MTU_MOVED(p) (0x04e8 + ((p) << 10))
+#define TX_BW_BURST_MOVED(p) (0x04ec + ((p) << 10))
#define RXQ_CURRENT_DESC_PTR(p, q) (0x060c + ((p) << 10) + ((q) << 4))
#define RXQ_COMMAND(p) (0x0680 + ((p) << 10))
#define TXQ_CURRENT_DESC_PTR(p, q) (0x06c0 + ((p) << 10) + ((q) << 2))
@@ -250,6 +254,7 @@
*/
unsigned int t_clk;
int extended_rx_coal_limit;
+ int tx_bw_control_moved;
};
@@ -831,9 +836,15 @@
if (bucket_size > 65535)
bucket_size = 65535;
- wrl(mp, TX_BW_RATE(mp->port_num), token_rate);
- wrl(mp, TX_BW_MTU(mp->port_num), mtu);
- wrl(mp, TX_BW_BURST(mp->port_num), bucket_size);
+ if (mp->shared->tx_bw_control_moved) {
+ wrl(mp, TX_BW_RATE_MOVED(mp->port_num), token_rate);
+ wrl(mp, TX_BW_MTU_MOVED(mp->port_num), mtu);
+ wrl(mp, TX_BW_BURST_MOVED(mp->port_num), bucket_size);
+ } else {
+ wrl(mp, TX_BW_RATE(mp->port_num), token_rate);
+ wrl(mp, TX_BW_MTU(mp->port_num), mtu);
+ wrl(mp, TX_BW_BURST(mp->port_num), bucket_size);
+ }
}
static void txq_set_rate(struct tx_queue *txq, int rate, int burst)
@@ -864,7 +875,10 @@
/*
* Turn on fixed priority mode.
*/
- off = TXQ_FIX_PRIO_CONF(mp->port_num);
+ if (mp->shared->tx_bw_control_moved)
+ off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
+ else
+ off = TXQ_FIX_PRIO_CONF(mp->port_num);
val = rdl(mp, off);
val |= 1 << txq->index;
@@ -880,7 +894,10 @@
/*
* Turn off fixed priority mode.
*/
- off = TXQ_FIX_PRIO_CONF(mp->port_num);
+ if (mp->shared->tx_bw_control_moved)
+ off = TXQ_FIX_PRIO_CONF_MOVED(mp->port_num);
+ else
+ off = TXQ_FIX_PRIO_CONF(mp->port_num);
val = rdl(mp, off);
val &= ~(1 << txq->index);
@@ -2108,6 +2125,16 @@
msp->extended_rx_coal_limit = 1;
else
msp->extended_rx_coal_limit = 0;
+
+ /*
+ * Check whether the TX rate control registers are in the
+ * old or the new place.
+ */
+ writel(1, msp->base + TX_BW_MTU_MOVED(0));
+ if (readl(msp->base + TX_BW_MTU_MOVED(0)) & 1)
+ msp->tx_bw_control_moved = 1;
+ else
+ msp->tx_bw_control_moved = 0;
}
static int mv643xx_eth_shared_probe(struct platform_device *pdev)