* SuperH on-chip serial module support. (SCI with no FIFO / with FIFO)
*
* Copyright (C) 2002 - 2006 Paul Mundt
+ * Modified to support SH7720 SCIF. Markus Brunner, Mark Jonas (Jul 2007).
*
* based off of the old drivers/char/sh-sci.c by:
*
* Modified to support multiple serial ports. Stuart Menefy (May 2000).
* Modified to support SecureEdge. David McCullough (2002)
* Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003).
+ * Removed SH7300 support (Jul 2007).
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
#include <linux/delay.h>
#include <linux/console.h>
#include <linux/platform_device.h>
-
-#ifdef CONFIG_CPU_FREQ
+#include <linux/serial_sci.h>
#include <linux/notifier.h>
#include <linux/cpufreq.h>
-#endif
-
-#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
+#include <linux/clk.h>
#include <linux/ctype.h>
+
+#ifdef CONFIG_SUPERH
#include <asm/clock.h>
#include <asm/sh_bios.h>
#include <asm/kgdb.h>
#endif
-#include <asm/sci.h>
#include "sh-sci.h"
struct sci_port {
unsigned int type;
/* Port IRQs: ERI, RXI, TXI, BRI (optional) */
- unsigned int irqs[SCIx_NR_IRQS];
+ unsigned int irqs[SCIx_NR_IRQS];
/* Port pin configuration */
void (*init_pins)(struct uart_port *port,
/* Break timer */
struct timer_list break_timer;
int break_flag;
+
+#ifdef CONFIG_SUPERH
+ /* Port clock */
+ struct clk *clk;
+#endif
};
#ifdef CONFIG_SH_KGDB
int h, l;
c = *p++;
- h = highhex(c);
- l = lowhex(c);
+ h = hex_asc_hi(c);
+ l = hex_asc_lo(c);
put_char(port, h);
put_char(port, l);
checksum += h + l;
}
put_char(port, '#');
- put_char(port, highhex(checksum));
- put_char(port, lowhex(checksum));
+ put_char(port, hex_asc_hi(checksum));
+ put_char(port, hex_asc_lo(checksum));
} while (get_char(port) != '+');
} else
#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
#endif
#if defined(SCIF_ONLY) || defined(SCI_AND_SCIF)
-#if defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7710)
-/* SH7300 doesn't use RTS/CTS */
+#if defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
+static void sci_init_pins_scif(struct uart_port* port, unsigned int cflag)
+{
+ unsigned int fcr_val = 0;
+
+ set_sh771x_scif_pfc(port);
+ if (cflag & CRTSCTS) {
+ fcr_val |= SCFCR_MCE;
+ }
+ sci_out(port, SCFCR, fcr_val);
+}
+#elif defined(CONFIG_CPU_SUBTYPE_SH7720) || defined(CONFIG_CPU_SUBTYPE_SH7721)
static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
{
- sci_out(port, SCFCR, 0);
+ unsigned int fcr_val = 0;
+ unsigned short data;
+
+ if (cflag & CRTSCTS) {
+ /* enable RTS/CTS */
+ if (port->mapbase == 0xa4430000) { /* SCIF0 */
+ /* Clear PTCR bit 9-2; enable all scif pins but sck */
+ data = ctrl_inw(PORT_PTCR);
+ ctrl_outw((data & 0xfc03), PORT_PTCR);
+ } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
+ /* Clear PVCR bit 9-2 */
+ data = ctrl_inw(PORT_PVCR);
+ ctrl_outw((data & 0xfc03), PORT_PVCR);
+ }
+ fcr_val |= SCFCR_MCE;
+ } else {
+ if (port->mapbase == 0xa4430000) { /* SCIF0 */
+ /* Clear PTCR bit 5-2; enable only tx and rx */
+ data = ctrl_inw(PORT_PTCR);
+ ctrl_outw((data & 0xffc3), PORT_PTCR);
+ } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
+ /* Clear PVCR bit 5-2 */
+ data = ctrl_inw(PORT_PVCR);
+ ctrl_outw((data & 0xffc3), PORT_PVCR);
+ }
+ }
+ sci_out(port, SCFCR, fcr_val);
}
#elif defined(CONFIG_CPU_SH3)
/* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */
static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
{
unsigned int fcr_val = 0;
+ unsigned short data;
- if (cflag & CRTSCTS) {
- fcr_val |= SCFCR_MCE;
-
- ctrl_outw(0x0000, PORT_PSCR);
- } else {
- unsigned short data;
-
- data = ctrl_inw(PORT_PSCR);
- data &= 0x033f;
- data |= 0x0400;
- ctrl_outw(data, PORT_PSCR);
+ if (port->mapbase == 0xffe00000) {
+ data = ctrl_inw(PSCR);
+ data &= ~0x03cf;
+ if (cflag & CRTSCTS)
+ fcr_val |= SCFCR_MCE;
+ else
+ data |= 0x0340;
- ctrl_outw(ctrl_inw(SCSPTR0) & 0x17, SCSPTR0);
+ ctrl_outw(data, PSCR);
}
+ /* SCIF1 and SCIF2 should be setup by board code */
sci_out(port, SCFCR, fcr_val);
}
+#elif defined(CONFIG_CPU_SUBTYPE_SH7723)
+static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
+{
+ /* Nothing to do here.. */
+ sci_out(port, SCFCR, 0);
+}
#else
/* For SH7750 */
static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
if (cflag & CRTSCTS) {
fcr_val |= SCFCR_MCE;
} else {
-#ifdef CONFIG_CPU_SUBTYPE_SH7343
+#if defined(CONFIG_CPU_SUBTYPE_SH7343) || defined(CONFIG_CPU_SUBTYPE_SH7366)
/* Nothing */
-#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
+#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7780) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7785) || \
+ defined(CONFIG_CPU_SUBTYPE_SHX3)
ctrl_outw(0x0080, SCSPTR0); /* Set RTS = 1 */
#else
ctrl_outw(0x0080, SCSPTR2); /* Set RTS = 1 */
}
#endif
-#if defined(CONFIG_CPU_SUBTYPE_SH7760) || defined(CONFIG_CPU_SUBTYPE_SH7780)
+#if defined(CONFIG_CPU_SUBTYPE_SH7760) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7780) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7785)
static inline int scif_txroom(struct uart_port *port)
{
- return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0x7f);
+ return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
}
static inline int scif_rxroom(struct uart_port *port)
{
- return sci_in(port, SCRFDR) & 0x7f;
+ return sci_in(port, SCRFDR) & 0xff;
}
#else
static inline int scif_txroom(struct uart_port *port)
/* Handle BREAKs */
sci_handle_breaks(port);
-
-#ifdef CONFIG_SH_KGDB
- /* Break into the debugger if a break is detected */
- breakpoint();
-#endif
-
sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
return IRQ_HANDLED;
printk(KERN_INFO "%s: got a postchange notification "
"for cpu %d (old %d, new %d)\n",
- __FUNCTION__, freqs->cpu, freqs->old, freqs->new);
+ __func__, freqs->cpu, freqs->old, freqs->new);
}
return NOTIFY_OK;
if (s->enable)
s->enable(port);
+#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
+ s->clk = clk_get(NULL, "module_clk");
+#endif
+
sci_request_irq(s);
sci_start_tx(port);
sci_start_rx(port, 1);
if (s->disable)
s->disable(port);
+
+#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
+ clk_put(s->clk);
+ s->clk = NULL;
+#endif
}
static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
default:
{
#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
- struct clk *clk = clk_get(NULL, "module_clk");
- t = SCBRR_VALUE(baud, clk_get_rate(clk));
- clk_put(clk);
+ t = SCBRR_VALUE(baud, clk_get_rate(s->clk));
#else
t = SCBRR_VALUE(baud);
#endif
port->type = serial_console_port->type;
+#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
+ if (!serial_console_port->clk)
+ serial_console_port->clk = clk_get(NULL, "module_clk");
+#endif
+
if (port->flags & UPF_IOREMAP)
sci_config_port(port, 0);
console_initcall(sci_console_init);
#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
-#ifdef CONFIG_SH_KGDB
+#ifdef CONFIG_SH_KGDB_CONSOLE
/*
* FIXME: Most of this can go away.. at the moment, we rely on
* arch/sh/kernel/setup.c to do the command line parsing for kgdb, though
return uart_set_options(port, co, baud, parity, bits, flow);
}
-#endif /* CONFIG_SH_KGDB */
-#ifdef CONFIG_SH_KGDB_CONSOLE
static struct console kgdb_console = {
.name = "ttySC",
.device = uart_console_device,
struct plat_sci_port *p = dev->dev.platform_data;
int i;
- for (i = 0; p && p->flags != 0 && i < SCI_NPORTS; p++, i++) {
+ for (i = 0; p && p->flags != 0; p++, i++) {
struct sci_port *sciport = &sci_ports[i];
+ /* Sanity check */
+ if (unlikely(i == SCI_NPORTS)) {
+ dev_notice(&dev->dev, "Attempting to register port "
+ "%d when only %d are available.\n",
+ i+1, SCI_NPORTS);
+ dev_notice(&dev->dev, "Consider bumping "
+ "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n");
+ break;
+ }
+
sciport->port.mapbase = p->mapbase;
/*
#ifdef CONFIG_CPU_FREQ
cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
- dev_info(&dev->dev, "sci: CPU frequency notifier registered\n");
+ dev_info(&dev->dev, "CPU frequency notifier registered\n");
#endif
#ifdef CONFIG_SH_STANDARD_BIOS
module_exit(sci_exit);
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:sh-sci");
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