mpc85xx: Configure QE UART for MPC8569E-MDS boards

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 4-bits mode on pilot boards, or if it's a prototype
board with eSDHC in 1- or 4-bits mode.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 78 insertions, 21 deletions

diff --git a/board/freescale/mpc8569mds/bcsr.h b/board/freescale/mpc8569mds/bcsr.h
index 2ed57d8..179a54c 100644
--- a/board/freescale/mpc8569mds/bcsr.h
+++ b/board/freescale/mpc8569mds/bcsr.h
@@ -68,6 +68,7 @@
 
 #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 7d1d02e..ef99a75 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                  */
@@ -311,7 +317,26 @@ local_bus_init(void)
 	out_be32(&lbc->lcrr, (u32)in_be32(&lbc->lcrr)| 0x00030000);
 }
 
-#ifdef CONFIG_FSL_ESDHC
+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;
+	}
+}
 
 /*
  * Because of an erratum in prototype boards it is impossible to use eSDHC
@@ -337,6 +362,53 @@ static int esdhc_disables_uart0(void)
 	       hwconfig_subarg_cmp("esdhc", "mode", "4-bits");
 }
 
+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") && esdhc_disables_uart0()) {
+		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)
 {
 	struct ccsr_gur *gur = (struct ccsr_gur *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
@@ -376,31 +448,14 @@ 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;
 
 	if (!hwconfig("esdhc"))
 		return;
 
-	if (!esdhc_disables_uart0())
-		goto disable_i2c2;
-
-	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;
-	}
+	if (esdhc_disables_uart0())
+		fdt_board_disable_serial(blob, bd, "serial0");
 
-disable_i2c2:
-	off = -1;
 	while (1) {
 		const u32 *idx;
 		int len;
@@ -566,5 +621,6 @@ void ft_board_setup(void *blob, bd_t *bd)
 	ft_fsl_pci_setup(blob, "pci1", &pcie1_hose);
 #endif
 	fdt_board_fixup_esdhc(blob, bd);
+	fdt_board_fixup_qe_uart(blob, bd);
 }
 #endif