/*
* SuperH SCIF device driver.
- * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ * Copyright (C) 2007,2008,2010, 2014 Nobuhiro Iwamatsu
* Copyright (C) 2002 - 2008 Paul Mundt
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <errno.h>
+#include <dm.h>
#include <asm/io.h>
#include <asm/processor.h>
+#include <serial.h>
+#include <linux/compiler.h>
+#include <dm/platform_data/serial_sh.h>
#include "serial_sh.h"
-#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
-#else
-# error "Default SCIF doesn't set....."
-#endif
-
-#if defined(CONFIG_SCIF_A)
- #define SCIF_BASE_PORT PORT_SCIFA
-#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,
-};
-
-void serial_setbrg(void)
-{
- DECLARE_GLOBAL_DATA_PTR;
- sci_out(&sh_sci, SCBRR, SCBRR_VALUE(gd->baudrate, CONFIG_SYS_CLK_FREQ));
-}
-
-int serial_init(void)
-{
- sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
- sci_out(&sh_sci, SCSCR , SCSCR_INIT(&sh_sci));
- sci_out(&sh_sci, SCSMR, 0);
- sci_out(&sh_sci, SCSMR, 0);
- sci_out(&sh_sci, SCFCR, SCFCR_RFRST|SCFCR_TFRST);
- sci_in(&sh_sci, SCFCR);
- sci_out(&sh_sci, SCFCR, 0);
-
- serial_setbrg();
- return 0;
-}
-
#if defined(CONFIG_CPU_SH7760) || \
defined(CONFIG_CPU_SH7780) || \
defined(CONFIG_CPU_SH7785) || \
static int scif_rxfill(struct uart_port *port)
{
if ((port->mapbase == 0xffe00000) ||
- (port->mapbase == 0xffe08000)) {
+ (port->mapbase == 0xffe08000)) {
/* SCIF0/1*/
return sci_in(port, SCRFDR) & 0xff;
} else {
}
#endif
-static int serial_rx_fifo_level(void)
+static void sh_serial_init_generic(struct uart_port *port)
{
- return scif_rxfill(&sh_sci);
+ 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);
}
-void serial_raw_putc(const char c)
+static void
+sh_serial_setbrg_generic(struct uart_port *port, int clk, int baudrate)
{
- while (1) {
- /* Tx fifo is empty */
- if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci))
- break;
+ 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));
}
-
- sci_out(&sh_sci, SCxTDR, c);
- sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci));
}
-void serial_putc(const char c)
+static void handle_error(struct uart_port *port)
{
- if (c == '\n')
- serial_raw_putc('\r');
- serial_raw_putc(c);
+ sci_in(port, SCxSR);
+ sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
+ sci_in(port, SCLSR);
+ sci_out(port, SCLSR, 0x00);
}
-void serial_puts(const char *s)
+static int serial_raw_putc(struct uart_port *port, const char c)
{
- char c;
- while ((c = *s++) != 0)
- serial_putc(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;
}
-int serial_tstc(void)
+static int serial_rx_fifo_level(struct uart_port *port)
{
- return serial_rx_fifo_level() ? 1 : 0;
+ return scif_rxfill(port);
}
-void handle_error(void)
+static int sh_serial_tstc_generic(struct uart_port *port)
{
- sci_in(&sh_sci, SCxSR);
- sci_out(&sh_sci, SCxSR, SCxSR_ERROR_CLEAR(&sh_sci));
- sci_in(&sh_sci, SCLSR);
- sci_out(&sh_sci, SCLSR, 0x00);
+ if (sci_in(port, SCxSR) & SCIF_ERRORS) {
+ handle_error(port);
+ return 0;
+ }
+
+ return serial_rx_fifo_level(port) ? 1 : 0;
}
-int serial_getc_check(void)
+static int serial_getc_check(struct uart_port *port)
{
unsigned short status;
- status = sci_in(&sh_sci, SCxSR);
+ status = sci_in(port, SCxSR);
if (status & SCIF_ERRORS)
- handle_error();
- if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
- handle_error();
- return status & (SCIF_DR | SCxSR_RDxF(&sh_sci));
+ handle_error(port);
+ if (sci_in(port, SCLSR) & SCxSR_ORER(port))
+ handle_error(port);
+ return status & (SCIF_DR | SCxSR_RDxF(port));
}
-int serial_getc(void)
+static int sh_serial_getc_generic(struct uart_port *port)
{
unsigned short status;
char ch;
- while (!serial_getc_check())
- ;
+ if (!serial_getc_check(port))
+ return -EAGAIN;
- ch = sci_in(&sh_sci, SCxRDR);
- status = sci_in(&sh_sci, SCxSR);
+ ch = sci_in(port, SCxRDR);
+ status = sci_in(port, SCxSR);
- sci_out(&sh_sci, SCxSR, SCxSR_RDxF_CLEAR(&sh_sci));
+ sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
if (status & SCIF_ERRORS)
- handle_error();
+ handle_error(port);
+
+ if (sci_in(port, SCLSR) & SCxSR_ORER(port))
+ handle_error(port);
- if (sci_in(&sh_sci, SCLSR) & SCxSR_ORER(&sh_sci))
- handle_error();
return ch;
}
+
+#ifdef CONFIG_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_platdata *plat = dev_get_platdata(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_platdata *plat = dev_get_platdata(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,
+};
+
+U_BOOT_DRIVER(serial_sh) = {
+ .name = "serial_sh",
+ .id = UCLASS_SERIAL,
+ .probe = sh_serial_probe,
+ .ops = &sh_serial_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+ .priv_auto_alloc_size = 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
+#else
+# error "Default SCIF doesn't set....."
+#endif
+
+#if defined(CONFIG_SCIF_A)
+ #define SCIF_BASE_PORT PORT_SCIFA
+#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 */
projects / karo-tx-uboot.git / blobdiff