init commit via android 4.4 uboot

1 files changed, 165 insertions, 0 deletions

diff --git a/cpu/mpc5xxx/serial.c b/cpu/mpc5xxx/serial.c
new file mode 100755
index 0000000..91e1def
--- /dev/null
+++ b/cpu/mpc5xxx/serial.c
@@ -0,0 +1,165 @@
+/*
+ * (C) Copyright 2000 - 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
+ * changes based on the file arch/ppc/mbxboot/m8260_tty.c from the
+ * Linux/PPC sources (m8260_tty.c had no copyright info in it).
+ */
+
+/*
+ * Minimal serial functions needed to use one of the PSC ports
+ * as serial console interface.
+ */
+
+#include <common.h>
+#include <mpc5xxx.h>
+
+#if defined(CONFIG_PSC_CONSOLE)
+
+#if CONFIG_PSC_CONSOLE == 1
+#define PSC_BASE MPC5XXX_PSC1
+#elif CONFIG_PSC_CONSOLE == 2
+#define PSC_BASE MPC5XXX_PSC2
+#elif CONFIG_PSC_CONSOLE == 3
+#define PSC_BASE MPC5XXX_PSC3
+#elif defined(CONFIG_MGT5100)
+#error CONFIG_PSC_CONSOLE must be in 1, 2 or 3
+#elif CONFIG_PSC_CONSOLE == 4
+#define PSC_BASE MPC5XXX_PSC4
+#elif CONFIG_PSC_CONSOLE == 5
+#define PSC_BASE MPC5XXX_PSC5
+#elif CONFIG_PSC_CONSOLE == 6
+#define PSC_BASE MPC5XXX_PSC6
+#else
+#error CONFIG_PSC_CONSOLE must be in 1 ... 6
+#endif
+
+int serial_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+	unsigned long baseclk;
+	int div;
+
+	/* reset PSC */
+	psc->command = PSC_SEL_MODE_REG_1;
+
+	/* select clock sources */
+#if defined(CONFIG_MGT5100)
+	psc->psc_clock_select = 0xdd00;
+	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
+#elif defined(CONFIG_MPC5200)
+	psc->psc_clock_select = 0;
+	baseclk = (gd->ipb_clk + 16) / 32;
+#endif
+
+	/* switch to UART mode */
+	psc->sicr = 0;
+
+	/* configure parity, bit length and so on */
+#if defined(CONFIG_MGT5100)
+	psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
+#elif defined(CONFIG_MPC5200)
+	psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
+#endif
+	psc->mode = PSC_MODE_ONE_STOP;
+
+	/* set up UART divisor */
+	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
+	psc->ctur = (div >> 8) & 0xff;
+	psc->ctlr = div & 0xff;
+
+	/* disable all interrupts */
+	psc->psc_imr = 0;
+
+	/* reset and enable Rx/Tx */
+	psc->command = PSC_RST_RX;
+	psc->command = PSC_RST_TX;
+	psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
+
+	return (0);
+}
+
+void
+serial_putc(const char c)
+{
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+
+	if (c == '\n')
+		serial_putc('\r');
+
+	/* Wait for last character to go. */
+	while (!(psc->psc_status & PSC_SR_TXEMP))
+		;
+
+	psc->psc_buffer_8 = c;
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+
+int
+serial_getc(void)
+{
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+
+	/* Wait for a character to arrive. */
+	while (!(psc->psc_status & PSC_SR_RXRDY))
+		;
+
+	return psc->psc_buffer_8;
+}
+
+int
+serial_tstc(void)
+{
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+
+	return (psc->psc_status & PSC_SR_RXRDY);
+}
+
+void
+serial_setbrg(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
+	unsigned long baseclk, div;
+
+#if defined(CONFIG_MGT5100)
+	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
+#elif defined(CONFIG_MPC5200)
+	baseclk = (gd->ipb_clk + 16) / 32;
+#endif
+
+	/* set up UART divisor */
+	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
+	psc->ctur = (div >> 8) & 0xFF;
+	psc->ctlr =  div & 0xff;
+}
+#endif /* CONFIG_PSC_CONSOLE */