bcm63xx_enet: add support for Broadcom BCM63xx integrated gigabit switch
Newer Broadcom BCM63xx SoCs: 6328, 6362 and 6368 have an integrated switch
which needs to be driven slightly differently from the traditional
external switches. This patch introduces changes in arch/mips/bcm63xx in order
to:
- register a bcm63xx_enetsw driver instead of bcm63xx_enet driver
- update DMA channels configuration & state RAM base addresses
- add a new platform data configuration knob to define the number of
ports per switch/device and force link on some ports
- define the required switch registers
On the driver side, the following changes are required:
- the switch ports need to be polled to ensure the link is up and
running and RX/TX can properly work
- basic switch configuration needs to be performed for the switch to
forward packets to the CPU
- update the MIB counters since the integrated
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/mips/bcm63xx/dev-enet.c b/arch/mips/bcm63xx/dev-enet.c
index df5bf66..6cbaee0 100644
--- a/arch/mips/bcm63xx/dev-enet.c
+++ b/arch/mips/bcm63xx/dev-enet.c
@@ -104,6 +104,64 @@
},
};
+static struct resource enetsw_res[] = {
+ {
+ /* start & end filled at runtime */
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* start filled at runtime */
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* start filled at runtime */
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct bcm63xx_enetsw_platform_data enetsw_pd;
+
+static struct platform_device bcm63xx_enetsw_device = {
+ .name = "bcm63xx_enetsw",
+ .num_resources = ARRAY_SIZE(enetsw_res),
+ .resource = enetsw_res,
+ .dev = {
+ .platform_data = &enetsw_pd,
+ },
+};
+
+static int __init register_shared(void)
+{
+ int ret, chan_count;
+
+ if (shared_device_registered)
+ return 0;
+
+ shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
+ shared_res[0].end = shared_res[0].start;
+ shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
+
+ if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
+ chan_count = 32;
+ else
+ chan_count = 16;
+
+ shared_res[1].start = bcm63xx_regset_address(RSET_ENETDMAC);
+ shared_res[1].end = shared_res[1].start;
+ shared_res[1].end += RSET_ENETDMAC_SIZE(chan_count) - 1;
+
+ shared_res[2].start = bcm63xx_regset_address(RSET_ENETDMAS);
+ shared_res[2].end = shared_res[2].start;
+ shared_res[2].end += RSET_ENETDMAS_SIZE(chan_count) - 1;
+
+ ret = platform_device_register(&bcm63xx_enet_shared_device);
+ if (ret)
+ return ret;
+ shared_device_registered = 1;
+
+ return 0;
+}
+
int __init bcm63xx_enet_register(int unit,
const struct bcm63xx_enet_platform_data *pd)
{
@@ -117,24 +175,9 @@
if (unit == 1 && BCMCPU_IS_6338())
return -ENODEV;
- if (!shared_device_registered) {
- shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
- shared_res[0].end = shared_res[0].start;
- shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
-
- shared_res[1].start = bcm63xx_regset_address(RSET_ENETDMAC);
- shared_res[1].end = shared_res[1].start;
- shared_res[1].end += RSET_ENETDMAC_SIZE(16) - 1;
-
- shared_res[2].start = bcm63xx_regset_address(RSET_ENETDMAS);
- shared_res[2].end = shared_res[2].start;
- shared_res[2].end += RSET_ENETDMAS_SIZE(16) - 1;
-
- ret = platform_device_register(&bcm63xx_enet_shared_device);
- if (ret)
- return ret;
- shared_device_registered = 1;
- }
+ ret = register_shared();
+ if (ret)
+ return ret;
if (unit == 0) {
enet0_res[0].start = bcm63xx_regset_address(RSET_ENET0);
@@ -175,3 +218,37 @@
return ret;
return 0;
}
+
+int __init
+bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd)
+{
+ int ret;
+
+ if (!BCMCPU_IS_6328() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
+ return -ENODEV;
+
+ ret = register_shared();
+ if (ret)
+ return ret;
+
+ enetsw_res[0].start = bcm63xx_regset_address(RSET_ENETSW);
+ enetsw_res[0].end = enetsw_res[0].start;
+ enetsw_res[0].end += RSET_ENETSW_SIZE - 1;
+ enetsw_res[1].start = bcm63xx_get_irq_number(IRQ_ENETSW_RXDMA0);
+ enetsw_res[2].start = bcm63xx_get_irq_number(IRQ_ENETSW_TXDMA0);
+ if (!enetsw_res[2].start)
+ enetsw_res[2].start = -1;
+
+ memcpy(bcm63xx_enetsw_device.dev.platform_data, pd, sizeof(*pd));
+
+ if (BCMCPU_IS_6328())
+ enetsw_pd.num_ports = ENETSW_PORTS_6328;
+ else if (BCMCPU_IS_6362() || BCMCPU_IS_6368())
+ enetsw_pd.num_ports = ENETSW_PORTS_6368;
+
+ ret = platform_device_register(&bcm63xx_enetsw_device);
+ if (ret)
+ return ret;
+
+ return 0;
+}