[PATCH v2 5/6] board: lx2160aqds: implement board_fit_config_name_match

[Ioana Ciornei]

In case CONFIG_DM_ETH and CONFIG_MULTI_DTB_FIT are enabled implement the
board_fit_config_name_match() function in order to choose the
appropriate DTS for the current SERDES protocol configuration.

Signed-off-by: Ioana Ciornei <ioana.ciornei at nxp.com>
---
Changes in v2:
 - none

 board/freescale/lx2160a/eth_lx2160aqds.c | 109 +++++++++++++++++++++++
 1 file changed, 109 insertions(+)

diff --git a/board/freescale/lx2160a/eth_lx2160aqds.c b/board/freescale/lx2160a/eth_lx2160aqds.c
index 3b7830343d1e..d90b5c3e3a2f 100644
--- a/board/freescale/lx2160a/eth_lx2160aqds.c
+++ b/board/freescale/lx2160a/eth_lx2160aqds.c
@@ -848,3 +848,112 @@ int fdt_fixup_board_phy(void *fdt)
 }
 #endif // CONFIG_FSL_MC_ENET
 #endif
+
+#if defined(CONFIG_DM_ETH) && defined(CONFIG_MULTI_DTB_FIT)
+
+/* Structure to hold SERDES protocols supported in case of
+ * CONFIG_DM_ETH enabled (network interfaces are described in the DTS).
+ *
+ * @serdes_block: the index of the SERDES block
+ * @serdes_protocol: the decimal value of the protocol supported
+ * @dts_needed: DTS notes describing the current configuration are needed
+ *
+ * When dts_needed is true, the board_fit_config_name_match() function
+ * will try to exactly match the current configuration of the block with a DTS
+ * name provided.
+ */
+static struct serdes_configuration {
+	u8 serdes_block;
+	u32 serdes_protocol;
+	bool dts_needed;
+} supported_protocols[] = {
+	/* Serdes block #1 */
+	{1, 3, true},
+	{1, 7, true},
+	{1, 19, true},
+	{1, 20, true},
+
+	/* Serdes block #2 */
+	{2, 2, false},
+	{2, 3, false},
+	{2, 5, false},
+	{2, 11, true},
+
+	/* Serdes block #3 */
+	{3, 2, false},
+	{3, 3, false},
+};
+
+#define SUPPORTED_SERDES_PROTOCOLS ARRAY_SIZE(supported_protocols)
+
+static bool protocol_supported(u8 serdes_block, u32 protocol)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol)
+			return true;
+	}
+
+	return false;
+}
+
+static void get_str_protocol(u8 serdes_block, u32 protocol, char *str)
+{
+	struct serdes_configuration serdes_conf;
+	int i;
+
+	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
+		serdes_conf = supported_protocols[i];
+		if (serdes_conf.serdes_block == serdes_block &&
+		    serdes_conf.serdes_protocol == protocol) {
+			if (serdes_conf.dts_needed == true)
+				sprintf(str, "%u", protocol);
+			else
+				sprintf(str, "x");
+			return;
+		}
+	}
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	struct ccsr_gur *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+	u32 rcw_status = in_le32(&gur->rcwsr[28]);
+	char srds_s1_str[2], srds_s2_str[2], srds_s3_str[2];
+	u32 srds_s1, srds_s2, srds_s3;
+	char expected_dts[100];
+
+	srds_s1 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK;
+	srds_s1 >>= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT;
+
+	srds_s2 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK;
+	srds_s2 >>= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT;
+
+	srds_s3 = rcw_status & FSL_CHASSIS3_RCWSR28_SRDS3_PRTCL_MASK;
+	srds_s3 >>= FSL_CHASSIS3_RCWSR28_SRDS3_PRTCL_SHIFT;
+
+	/* Check for supported protocols. The default DTS will be used
+	 * in this case
+	 */
+	if (!protocol_supported(1, srds_s1) ||
+	    !protocol_supported(2, srds_s2) ||
+	    !protocol_supported(3, srds_s3))
+		return -1;
+
+	get_str_protocol(1, srds_s1, srds_s1_str);
+	get_str_protocol(2, srds_s2, srds_s2_str);
+	get_str_protocol(3, srds_s3, srds_s3_str);
+
+	sprintf(expected_dts, "fsl-lx2160a-qds-%s-%s-%s",
+		srds_s1_str, srds_s2_str, srds_s3_str);
+
+	if (!strcmp(name, expected_dts))
+		return 0;
+
+	return -1;
+}
+#endif
-- 
2.17.1