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mpc85xx: Configure QE UART for MPC8569E-MDS boards

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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>
This commit is contained in:
Anton Vorontsov 2009-10-15 17:47:13 +04:00 • committed by Kumar Gala
parent 70d665b1d2
commit 14809b6c21
2 changed files with 78 additions and 21 deletions
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1
board/freescale/mpc8569mds/bcsr.h
View file

@ -68,6 +68,7 @@
#define BCSR15_SMII6_DIS 0x08
#define BCSR15_SMII8_DIS 0x04
#define BCSR15_QEUART_EN 0x01
#define BCSR16_UPC1_DEV2 0x02

98
board/freescale/mpc8569mds/mpc8569mds.c
View file

@ -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;
if (esdhc_disables_uart0())
fdt_board_disable_serial(blob, bd, "serial0");
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;
}
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