[U-Boot] [PATCH 6/7] mpc85xx: Configure QE UART for MPC8569E-MDS boards

[Anton Vorontsov]

To make QE UART usable by Linux we should setup pin multiplexing
and turn UCC2 Ethernet node into UCC2 QE UART node.

Also, QE UART is mutually exclusive with UART0, so we can't enable
it if eSDHC is in use.

Signed-off-by: Anton Vorontsov <avorontsov at ru.mvista.com>
---
 board/freescale/mpc8569mds/bcsr.h       |    1 +
 board/freescale/mpc8569mds/mpc8569mds.c |   92 +++++++++++++++++++++++++------
 2 files changed, 76 insertions(+), 17 deletions(-)

diff --git a/board/freescale/mpc8569mds/bcsr.h b/board/freescale/mpc8569mds/bcsr.h
index c4738d7..8f53ddd 100644
--- a/board/freescale/mpc8569mds/bcsr.h
+++ b/board/freescale/mpc8569mds/bcsr.h
@@ -67,6 +67,7 @@
 
 #define BCSR15_SMII6_DIS	0x08
 #define BCSR15_SMII8_DIS	0x04
+#define BCSR15_QEUART_EN	0x01
 
 #define BCSR16_UPC1_DEV2	0x02
 
diff --git a/board/freescale/mpc8569mds/mpc8569mds.c b/board/freescale/mpc8569mds/mpc8569mds.c
index 55e5073..1197e20 100644
--- a/board/freescale/mpc8569mds/mpc8569mds.c
+++ b/board/freescale/mpc8569mds/mpc8569mds.c
@@ -154,6 +154,12 @@ const qe_iop_conf_t qe_iop_conf_tab[] = {
 	{5, 10, 2, 0, 3}, /* UART1_CTS_B */
 	{5, 11, 1, 0, 2}, /* UART1_RTS_B */
 
+	/* QE UART                                     */
+	{0, 19, 1, 0, 2}, /* QEUART_TX                 */
+	{1, 17, 2, 0, 3}, /* QEUART_RX                 */
+	{0, 25, 1, 0, 1}, /* QEUART_RTS                */
+	{1, 23, 2, 0, 1}, /* QEUART_CTS                */
+
 	/* SPI Flash, M25P40                           */
 	{4, 27, 3, 0, 1}, /* SPI_MOSI                  */
 	{4, 28, 3, 0, 1}, /* SPI_MISO                  */
@@ -311,6 +317,72 @@ local_bus_init(void)
 	out_be32(&lbc->lcrr, (u32)in_be32(&lbc->lcrr)| 0x00030000);
 }
 
+static void fdt_board_disable_serial(void *blob, bd_t *bd, const char *alias)
+{
+	const char *status = "disabled";
+	int off;
+	int err;
+
+	off = fdt_path_offset(blob, alias);
+	if (off < 0) {
+		printf("WARNING: could not find %s alias: %s.\n", alias,
+			fdt_strerror(off));
+		return;
+	}
+
+	err = fdt_setprop(blob, off, "status", status, strlen(status) + 1);
+	if (err) {
+		printf("WARNING: could not set status for serial0: %s.\n",
+			fdt_strerror(err));
+		return;
+	}
+}
+
+static void fdt_board_fixup_qe_uart(void *blob, bd_t *bd)
+{
+	u8 *bcsr = (u8 *)CONFIG_SYS_BCSR_BASE;
+	const char *devtype = "serial";
+	const char *compat = "ucc_uart";
+	const char *clk = "brg9";
+	u32 portnum = 0;
+	int off = -1;
+
+	if (!hwconfig("qe_uart"))
+		return;
+
+	if (hwconfig("esdhc")) {
+		printf("QE UART: won't enable with esdhc.\n");
+		return;
+	}
+
+	fdt_board_disable_serial(blob, bd, "serial1");
+
+	while (1) {
+		const u32 *idx;
+		int len;
+
+		off = fdt_node_offset_by_compatible(blob, off, "ucc_geth");
+		if (off < 0) {
+			printf("WARNING: unable to fixup device tree for "
+				"QE UART\n");
+			return;
+		}
+
+		idx = fdt_getprop(blob, off, "cell-index", &len);
+		if (!idx || len != sizeof(*idx) || *idx != fdt32_to_cpu(2))
+			continue;
+		break;
+	}
+
+	fdt_setprop(blob, off, "device_type", devtype, strlen(devtype) + 1);
+	fdt_setprop(blob, off, "compatible", compat, strlen(compat) + 1);
+	fdt_setprop(blob, off, "tx-clock-name", clk, strlen(clk) + 1);
+	fdt_setprop(blob, off, "rx-clock-name", clk, strlen(clk) + 1);
+	fdt_setprop(blob, off, "port-number", &portnum, sizeof(portnum));
+
+	setbits_8(&bcsr[15], BCSR15_QEUART_EN);
+}
+
 #ifdef CONFIG_FSL_ESDHC
 int board_mmc_init(bd_t *bd)
 {
@@ -343,8 +415,7 @@ int board_mmc_init(bd_t *bd)
 static void fdt_board_fixup_esdhc(void *blob, bd_t *bd)
 {
 	const char *status = "disabled";
-	int off;
-	int err;
+	int off = -1;
 
 	/*
 	 * In case of enabled eSDHC, we should disable UART0 and I2C2
@@ -353,22 +424,8 @@ static void fdt_board_fixup_esdhc(void *blob, bd_t *bd)
 	if (!hwconfig("esdhc"))
 		return;
 
-	off = fdt_path_offset(blob, "serial0");
-	if (off < 0) {
-		printf("WARNING: could not find serial0 alias: %s.\n",
-			fdt_strerror(off));
-		goto disable_i2c2;
-	}
-
-	err = fdt_setprop(blob, off, "status", status, strlen(status) + 1);
-	if (err) {
-		printf("WARNING: could not set status for serial0: %s.\n",
-			fdt_strerror(err));
-		return;
-	}
+	fdt_board_disable_serial(blob, bd, "serial0");
 
-disable_i2c2:
-	off = -1;
 	while (1) {
 		const u32 *idx;
 		int len;
@@ -540,5 +597,6 @@ void ft_board_setup(void *blob, bd_t *bd)
 #endif
 	fdt_fixup_esdhc(blob, bd);
 	fdt_board_fixup_esdhc(blob, bd);
+	fdt_board_fixup_qe_uart(blob, bd);
 }
 #endif
-- 
1.6.3.3