X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fserial%2Flpc32xx_hsuart.c;h=8b0fd254b1b2aaf70244d9b10ca44c21a84e90f2;hb=fee9e83557e32fb2cdfec6bc4e7841474182bca9;hp=02429b554163e1952f7e8c118e33379422412788;hpb=a3827250606895ec2dd4b8d867342b7cabf3692f;p=oweals%2Fu-boot.git

diff --git a/drivers/serial/lpc32xx_hsuart.c b/drivers/serial/lpc32xx_hsuart.c
index 02429b5541..8b0fd254b1 100644
--- a/drivers/serial/lpc32xx_hsuart.c
+++ b/drivers/serial/lpc32xx_hsuart.c
@@ -1,105 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright (C) 2011 Vladimir Zapolskiy <vz@mleia.com>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301, USA.
+ * Copyright (C) 2011-2015 Vladimir Zapolskiy <vz@mleia.com>
  */
 
 #include <common.h>
-#include <asm/arch/cpu.h>
-#include <asm/arch/clk.h>
-#include <asm/arch/uart.h>
-#include <asm/io.h>
+#include <dm.h>
 #include <serial.h>
-#include <linux/compiler.h>
+#include <dm/platform_data/lpc32xx_hsuart.h>
 
-DECLARE_GLOBAL_DATA_PTR;
+#include <asm/arch/uart.h>
+#include <linux/compiler.h>
 
-static struct hsuart_regs *hsuart = (struct hsuart_regs *)HS_UART_BASE;
+struct lpc32xx_hsuart_priv {
+	struct hsuart_regs *hsuart;
+};
 
-static void lpc32xx_serial_setbrg(void)
+static int lpc32xx_serial_setbrg(struct udevice *dev, int baudrate)
 {
+	struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev);
+	struct hsuart_regs *hsuart = priv->hsuart;
 	u32 div;
 
 	/* UART rate = PERIPH_CLK / ((HSU_RATE + 1) x 14) */
-	div = (get_serial_clock() / 14 + gd->baudrate / 2) / gd->baudrate - 1;
+	div = (get_serial_clock() / 14 + baudrate / 2) / baudrate - 1;
 	if (div > 255)
 		div = 255;
 
 	writel(div, &hsuart->rate);
+
+	return 0;
 }
 
-static int lpc32xx_serial_getc(void)
+static int lpc32xx_serial_getc(struct udevice *dev)
 {
-	while (!(readl(&hsuart->level) & HSUART_LEVEL_RX))
-		/* NOP */;
+	struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev);
+	struct hsuart_regs *hsuart = priv->hsuart;
+
+	if (!(readl(&hsuart->level) & HSUART_LEVEL_RX))
+		return -EAGAIN;
 
 	return readl(&hsuart->rx) & HSUART_RX_DATA;
 }
 
-static void lpc32xx_serial_putc(const char c)
+static int lpc32xx_serial_putc(struct udevice *dev, const char c)
 {
+	struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev);
+	struct hsuart_regs *hsuart = priv->hsuart;
+
+	/* Wait for empty FIFO */
+	if (readl(&hsuart->level) & HSUART_LEVEL_TX)
+		return -EAGAIN;
+
 	writel(c, &hsuart->tx);
 
-	/* Wait for character to be sent */
-	while (readl(&hsuart->level) & HSUART_LEVEL_TX)
-		/* NOP */;
+	return 0;
 }
 
-static int lpc32xx_serial_tstc(void)
+static int lpc32xx_serial_pending(struct udevice *dev, bool input)
 {
-	if (readl(&hsuart->level) & HSUART_LEVEL_RX)
-		return 1;
+	struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev);
+	struct hsuart_regs *hsuart = priv->hsuart;
+
+	if (input) {
+		if (readl(&hsuart->level) & HSUART_LEVEL_RX)
+			return 1;
+	} else {
+		if (readl(&hsuart->level) & HSUART_LEVEL_TX)
+			return 1;
+	}
 
 	return 0;
 }
 
-static int lpc32xx_serial_init(void)
+static int lpc32xx_serial_init(struct hsuart_regs *hsuart)
 {
-	lpc32xx_serial_setbrg();
-
 	/* Disable hardware RTS and CTS flow control, set up RX and TX FIFO */
 	writel(HSUART_CTRL_TMO_16 | HSUART_CTRL_HSU_OFFSET(20) |
 	       HSUART_CTRL_HSU_RX_TRIG_32 | HSUART_CTRL_HSU_TX_TRIG_0,
 	       &hsuart->ctrl);
+
 	return 0;
 }
 
-static void lpc32xx_serial_puts(const char *s)
+static int lpc32xx_hsuart_probe(struct udevice *dev)
 {
-	while (*s)
-		serial_putc(*s++);
+	struct lpc32xx_hsuart_platdata *platdata = dev_get_platdata(dev);
+	struct lpc32xx_hsuart_priv *priv = dev_get_priv(dev);
+
+	priv->hsuart = (struct hsuart_regs *)platdata->base;
+
+	lpc32xx_serial_init(priv->hsuart);
+
+	return 0;
 }
 
-static struct serial_device lpc32xx_serial_drv = {
-	.name	= "lpc32xx_serial",
-	.start	= lpc32xx_serial_init,
-	.stop	= NULL,
+static const struct dm_serial_ops lpc32xx_hsuart_ops = {
 	.setbrg	= lpc32xx_serial_setbrg,
-	.putc	= lpc32xx_serial_putc,
-	.puts	= lpc32xx_serial_puts,
 	.getc	= lpc32xx_serial_getc,
-	.tstc	= lpc32xx_serial_tstc,
+	.putc	= lpc32xx_serial_putc,
+	.pending = lpc32xx_serial_pending,
 };
 
-void lpc32xx_serial_initialize(void)
-{
-	serial_register(&lpc32xx_serial_drv);
-}
-
-__weak struct serial_device *default_serial_console(void)
-{
-	return &lpc32xx_serial_drv;
-}
+U_BOOT_DRIVER(lpc32xx_hsuart) = {
+	.name	= "lpc32xx_hsuart",
+	.id	= UCLASS_SERIAL,
+	.probe	= lpc32xx_hsuart_probe,
+	.ops	= &lpc32xx_hsuart_ops,
+	.priv_auto_alloc_size = sizeof(struct lpc32xx_hsuart_priv),
+	.flags	= DM_FLAG_PRE_RELOC,
+};