1 files changed, 369 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/serial/serial_sh.c b/roms/u-boot/drivers/serial/serial_sh.c
new file mode 100644
index 000000000..e6c23cedf
--- /dev/null
+++ b/roms/u-boot/drivers/serial/serial_sh.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * SuperH SCIF device driver.
+ * Copyright (C) 2013  Renesas Electronics Corporation
+ * Copyright (C) 2007,2008,2010, 2014 Nobuhiro Iwamatsu
+ * Copyright (C) 2002 - 2008  Paul Mundt
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <clk.h>
+#include <dm.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <serial.h>
+#include <linux/compiler.h>
+#include <dm/platform_data/serial_sh.h>
+#include <linux/delay.h>
+#include "serial_sh.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_CPU_SH7780)
+static int scif_rxfill(struct uart_port *port)
+{
+	return sci_in(port, SCRFDR) & 0xff;
+}
+#elif defined(CONFIG_CPU_SH7763)
+static int scif_rxfill(struct uart_port *port)
+{
+	if ((port->mapbase == 0xffe00000) ||
+	    (port->mapbase == 0xffe08000)) {
+		/* SCIF0/1*/
+		return sci_in(port, SCRFDR) & 0xff;
+	} else {
+		/* SCIF2 */
+		return sci_in(port, SCFDR) & SCIF2_RFDC_MASK;
+	}
+}
+#else
+static int scif_rxfill(struct uart_port *port)
+{
+	return sci_in(port, SCFDR) & SCIF_RFDC_MASK;
+}
+#endif
+
+static void sh_serial_init_generic(struct uart_port *port)
+{
+	sci_out(port, SCSCR , SCSCR_INIT(port));
+	sci_out(port, SCSCR , SCSCR_INIT(port));
+	sci_out(port, SCSMR, 0);
+	sci_out(port, SCSMR, 0);
+	sci_out(port, SCFCR, SCFCR_RFRST|SCFCR_TFRST);
+	sci_in(port, SCFCR);
+	sci_out(port, SCFCR, 0);
+#if defined(CONFIG_RZA1)
+	sci_out(port, SCSPTR, 0x0003);
+#endif
+}
+
+static void
+sh_serial_setbrg_generic(struct uart_port *port, int clk, int baudrate)
+{
+	if (port->clk_mode == EXT_CLK) {
+		unsigned short dl = DL_VALUE(baudrate, clk);
+		sci_out(port, DL, dl);
+		/* Need wait: Clock * 1/dl * 1/16 */
+		udelay((1000000 * dl * 16 / clk) * 1000 + 1);
+	} else {
+		sci_out(port, SCBRR, SCBRR_VALUE(baudrate, clk));
+	}
+}
+
+static void handle_error(struct uart_port *port)
+{
+	sci_in(port, SCxSR);
+	sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
+	sci_in(port, SCLSR);
+	sci_out(port, SCLSR, 0x00);
+}
+
+static int serial_raw_putc(struct uart_port *port, const char c)
+{
+	/* Tx fifo is empty */
+	if (!(sci_in(port, SCxSR) & SCxSR_TEND(port)))
+		return -EAGAIN;
+
+	sci_out(port, SCxTDR, c);
+	sci_out(port, SCxSR, sci_in(port, SCxSR) & ~SCxSR_TEND(port));
+
+	return 0;
+}
+
+static int serial_rx_fifo_level(struct uart_port *port)
+{
+	return scif_rxfill(port);
+}
+
+static int sh_serial_tstc_generic(struct uart_port *port)
+{
+	if (sci_in(port, SCxSR) & SCIF_ERRORS) {
+		handle_error(port);
+		return 0;
+	}
+
+	return serial_rx_fifo_level(port) ? 1 : 0;
+}
+
+static int serial_getc_check(struct uart_port *port)
+{
+	unsigned short status;
+
+	status = sci_in(port, SCxSR);
+
+	if (status & SCIF_ERRORS)
+		handle_error(port);
+	if (sci_in(port, SCLSR) & SCxSR_ORER(port))
+		handle_error(port);
+	status &= (SCIF_DR | SCxSR_RDxF(port));
+	if (status)
+		return status;
+	return scif_rxfill(port);
+}
+
+static int sh_serial_getc_generic(struct uart_port *port)
+{
+	unsigned short status;
+	char ch;
+
+	if (!serial_getc_check(port))
+		return -EAGAIN;
+
+	ch = sci_in(port, SCxRDR);
+	status = sci_in(port, SCxSR);
+
+	sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
+
+	if (status & SCIF_ERRORS)
+		handle_error(port);
+
+	if (sci_in(port, SCLSR) & SCxSR_ORER(port))
+		handle_error(port);
+
+	return ch;
+}
+
+#if CONFIG_IS_ENABLED(DM_SERIAL)
+
+static int sh_serial_pending(struct udevice *dev, bool input)
+{
+	struct uart_port *priv = dev_get_priv(dev);
+
+	return sh_serial_tstc_generic(priv);
+}
+
+static int sh_serial_putc(struct udevice *dev, const char ch)
+{
+	struct uart_port *priv = dev_get_priv(dev);
+
+	return serial_raw_putc(priv, ch);
+}
+
+static int sh_serial_getc(struct udevice *dev)
+{
+	struct uart_port *priv = dev_get_priv(dev);
+
+	return sh_serial_getc_generic(priv);
+}
+
+static int sh_serial_setbrg(struct udevice *dev, int baudrate)
+{
+	struct sh_serial_plat *plat = dev_get_plat(dev);
+	struct uart_port *priv = dev_get_priv(dev);
+
+	sh_serial_setbrg_generic(priv, plat->clk, baudrate);
+
+	return 0;
+}
+
+static int sh_serial_probe(struct udevice *dev)
+{
+	struct sh_serial_plat *plat = dev_get_plat(dev);
+	struct uart_port *priv = dev_get_priv(dev);
+
+	priv->membase	= (unsigned char *)plat->base;
+	priv->mapbase	= plat->base;
+	priv->type	= plat->type;
+	priv->clk_mode	= plat->clk_mode;
+
+	sh_serial_init_generic(priv);
+
+	return 0;
+}
+
+static const struct dm_serial_ops sh_serial_ops = {
+	.putc = sh_serial_putc,
+	.pending = sh_serial_pending,
+	.getc = sh_serial_getc,
+	.setbrg = sh_serial_setbrg,
+};
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static const struct udevice_id sh_serial_id[] ={
+	{.compatible = "renesas,sci", .data = PORT_SCI},
+	{.compatible = "renesas,scif", .data = PORT_SCIF},
+	{.compatible = "renesas,scifa", .data = PORT_SCIFA},
+	{}
+};
+
+static int sh_serial_of_to_plat(struct udevice *dev)
+{
+	struct sh_serial_plat *plat = dev_get_plat(dev);
+	struct clk sh_serial_clk;
+	fdt_addr_t addr;
+	int ret;
+
+	addr = dev_read_addr(dev);
+	if (!addr)
+		return -EINVAL;
+
+	plat->base = addr;
+
+	ret = clk_get_by_name(dev, "fck", &sh_serial_clk);
+	if (!ret) {
+		ret = clk_enable(&sh_serial_clk);
+		if (!ret)
+			plat->clk = clk_get_rate(&sh_serial_clk);
+	} else {
+		plat->clk = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
+					   "clock", 1);
+	}
+
+	plat->type = dev_get_driver_data(dev);
+	return 0;
+}
+#endif
+
+U_BOOT_DRIVER(serial_sh) = {
+	.name	= "serial_sh",
+	.id	= UCLASS_SERIAL,
+	.of_match = of_match_ptr(sh_serial_id),
+	.of_to_plat = of_match_ptr(sh_serial_of_to_plat),
+	.plat_auto	= sizeof(struct sh_serial_plat),
+	.probe	= sh_serial_probe,
+	.ops	= &sh_serial_ops,
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
+	.flags	= DM_FLAG_PRE_RELOC,
+#endif
+	.priv_auto	= sizeof(struct uart_port),
+};
+
+#else /* CONFIG_DM_SERIAL */
+
+#if defined(CONFIG_CONS_SCIF0)
+# define SCIF_BASE	SCIF0_BASE
+#elif defined(CONFIG_CONS_SCIF1)
+# define SCIF_BASE	SCIF1_BASE
+#elif defined(CONFIG_CONS_SCIF2)
+# define SCIF_BASE	SCIF2_BASE
+#elif defined(CONFIG_CONS_SCIF3)
+# define SCIF_BASE	SCIF3_BASE
+#elif defined(CONFIG_CONS_SCIF4)
+# define SCIF_BASE	SCIF4_BASE
+#elif defined(CONFIG_CONS_SCIF5)
+# define SCIF_BASE	SCIF5_BASE
+#elif defined(CONFIG_CONS_SCIF6)
+# define SCIF_BASE	SCIF6_BASE
+#elif defined(CONFIG_CONS_SCIF7)
+# define SCIF_BASE	SCIF7_BASE
+#elif defined(CONFIG_CONS_SCIFA0)
+# define SCIF_BASE	SCIFA0_BASE
+#else
+# error "Default SCIF doesn't set....."
+#endif
+
+#if defined(CONFIG_SCIF_A)
+	#define SCIF_BASE_PORT	PORT_SCIFA
+#elif defined(CONFIG_SCI)
+	#define SCIF_BASE_PORT  PORT_SCI
+#else
+	#define SCIF_BASE_PORT	PORT_SCIF
+#endif
+
+static struct uart_port sh_sci = {
+	.membase	= (unsigned char *)SCIF_BASE,
+	.mapbase	= SCIF_BASE,
+	.type		= SCIF_BASE_PORT,
+#ifdef CONFIG_SCIF_USE_EXT_CLK
+	.clk_mode =	EXT_CLK,
+#endif
+};
+
+static void sh_serial_setbrg(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	struct uart_port *port = &sh_sci;
+
+	sh_serial_setbrg_generic(port, CONFIG_SH_SCIF_CLK_FREQ, gd->baudrate);
+}
+
+static int sh_serial_init(void)
+{
+	struct uart_port *port = &sh_sci;
+
+	sh_serial_init_generic(port);
+	serial_setbrg();
+
+	return 0;
+}
+
+static void sh_serial_putc(const char c)
+{
+	struct uart_port *port = &sh_sci;
+
+	if (c == '\n') {
+		while (1) {
+			if  (serial_raw_putc(port, '\r') != -EAGAIN)
+				break;
+		}
+	}
+	while (1) {
+		if  (serial_raw_putc(port, c) != -EAGAIN)
+			break;
+	}
+}
+
+static int sh_serial_tstc(void)
+{
+	struct uart_port *port = &sh_sci;
+
+	return sh_serial_tstc_generic(port);
+}
+
+static int sh_serial_getc(void)
+{
+	struct uart_port *port = &sh_sci;
+	int ch;
+
+	while (1) {
+		ch = sh_serial_getc_generic(port);
+		if (ch != -EAGAIN)
+			break;
+	}
+
+	return ch;
+}
+
+static struct serial_device sh_serial_drv = {
+	.name	= "sh_serial",
+	.start	= sh_serial_init,
+	.stop	= NULL,
+	.setbrg	= sh_serial_setbrg,
+	.putc	= sh_serial_putc,
+	.puts	= default_serial_puts,
+	.getc	= sh_serial_getc,
+	.tstc	= sh_serial_tstc,
+};
+
+void sh_serial_initialize(void)
+{
+	serial_register(&sh_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &sh_serial_drv;
+}
+#endif /* CONFIG_DM_SERIAL */