[U-Boot] [PATCH v2] dm: sh: serial: Add support driver model
Nobuhiro Iwamatsu
nobuhiro.iwamatsu.yj at renesas.com
Fri Dec 12 03:04:02 CET 2014
This adds driver model support with this driver. This was tested by Koelsch
board and Gose board.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at renesas.com>
---
V2: Fix loop for tx fifo and tx fifo.
Fix write return code writing with DM.
drivers/serial/serial_sh.c | 311 ++++++++++++++++++++++++-----------
drivers/serial/serial_sh.h | 10 +-
include/dm/platform_data/serial_sh.h | 37 +++++
3 files changed, 252 insertions(+), 106 deletions(-)
create mode 100644 include/dm/platform_data/serial_sh.h
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index 7c1f271..882c147 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -1,78 +1,21 @@
/*
* SuperH SCIF device driver.
* Copyright (C) 2013 Renesas Electronics Corporation
- * Copyright (C) 2007,2008,2010 Nobuhiro Iwamatsu
+ * Copyright (C) 2007,2008,2010, 2014 Nobuhiro Iwamatsu
* Copyright (C) 2002 - 2008 Paul Mundt
*
* 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_sh.h"
#include <serial.h>
#include <linux/compiler.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,
-};
-
-static void sh_serial_setbrg(void)
-{
- DECLARE_GLOBAL_DATA_PTR;
-#ifdef CONFIG_SCIF_USE_EXT_CLK
- unsigned short dl = DL_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ);
- sci_out(&sh_sci, DL, dl);
- /* Need wait: Clock * 1/dl × 1/16 */
- udelay((1000000 * dl * 16 / CONFIG_SYS_CLK_FREQ) * 1000 + 1);
-#else
- sci_out(&sh_sci, SCBRR,
- SCBRR_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ));
-#endif
-}
-
-static int sh_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;
-}
+#include <dm/platform_data/serial_sh.h>
+#include "serial_sh.h"
#if defined(CONFIG_CPU_SH7760) || \
defined(CONFIG_CPU_SH7780) || \
@@ -109,83 +52,250 @@ static int scif_rxfill(struct uart_port *port)
}
#endif
-static int serial_rx_fifo_level(void)
+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);
+}
+
+static void
+sh_serial_setbrg_generic(struct uart_port *port, int clk, int baudrate)
{
- return scif_rxfill(&sh_sci);
+ 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(void)
+static void handle_error(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);
+ sci_in(port, SCxSR);
+ sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
+ sci_in(port, SCLSR);
+ sci_out(port, SCLSR, 0x00);
}
-static void serial_raw_putc(const char c)
+static int serial_raw_putc(struct uart_port *port, const char c)
{
- while (1) {
- /* Tx fifo is empty */
- if (sci_in(&sh_sci, SCxSR) & SCxSR_TEND(&sh_sci))
- break;
- }
+ /* 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));
- sci_out(&sh_sci, SCxTDR, c);
- sci_out(&sh_sci, SCxSR, sci_in(&sh_sci, SCxSR) & ~SCxSR_TEND(&sh_sci));
+ return 0;
}
-static void sh_serial_putc(const char c)
+static int sh_serial_putc_generic(struct uart_port *port, const char c)
{
+#ifndef CONFIG_DM_SERIAL
if (c == '\n')
- serial_raw_putc('\r');
- serial_raw_putc(c);
+ serial_raw_putc(port, '\r');
+#endif
+ return serial_raw_putc(port, c);
+
}
-static int sh_serial_tstc(void)
+static int serial_rx_fifo_level(struct uart_port *port)
{
- if (sci_in(&sh_sci, SCxSR) & SCIF_ERRORS) {
- handle_error();
+ 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() ? 1 : 0;
+ return serial_rx_fifo_level(port) ? 1 : 0;
}
-
-static 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));
}
-static int sh_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 sh_serial_putc_generic(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;
+
+ sh_serial_putc_generic(port, c);
+}
+
+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;
+
+ return sh_serial_getc_generic(port);
+}
+
static struct serial_device sh_serial_drv = {
.name = "sh_serial",
.start = sh_serial_init,
@@ -206,3 +316,4 @@ __weak struct serial_device *default_serial_console(void)
{
return &sh_serial_drv;
}
+#endif /* CONFIG_DM_SERIAL */
diff --git a/drivers/serial/serial_sh.h b/drivers/serial/serial_sh.h
index ef88c8f..4b6199a 100644
--- a/drivers/serial/serial_sh.h
+++ b/drivers/serial/serial_sh.h
@@ -2,18 +2,16 @@
* Copy and modify from linux/drivers/serial/sh-sci.h
*/
+#include <dm/platform_data/serial_sh.h>
+
struct uart_port {
unsigned long iobase; /* in/out[bwl] */
unsigned char *membase; /* read/write[bwl] */
unsigned long mapbase; /* for ioremap */
- unsigned int type; /* port type */
+ enum sh_serial_type type; /* port type */
+ enum sh_clk_mode clk_mode; /* clock mode */
};
-#define PORT_SCI 52
-#define PORT_SCIF 53
-#define PORT_SCIFA 83
-#define PORT_SCIFB 93
-
#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
#include <asm/regs306x.h>
#endif
diff --git a/include/dm/platform_data/serial_sh.h b/include/dm/platform_data/serial_sh.h
new file mode 100644
index 0000000..0271ad6
--- /dev/null
+++ b/include/dm/platform_data/serial_sh.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2014 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at renesas.com>
+ * Copyright (c) 2014 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __serial_sh_h
+#define __serial_sh_h
+
+enum sh_clk_mode {
+ INT_CLK,
+ EXT_CLK,
+};
+
+enum sh_serial_type {
+ PORT_SCI,
+ PORT_SCIF,
+ PORT_SCIFA,
+ PORT_SCIFB,
+};
+
+/*
+ * Information about SCIF port
+ *
+ * @base: Register base address
+ * @clk: Input clock rate, used for calculating the baud rate divisor
+ * @clk_mode: Clock mode, set internal (INT) or external (EXT)
+ * @type: Type of SCIF
+ */
+struct sh_serial_platdata {
+ unsigned long base;
+ unsigned int clk;
+ enum sh_clk_mode clk_mode;
+ enum sh_serial_type type;
+};
+#endif /* __serial_sh_h */
--
2.1.3
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