[MIPS] Alchemy: replace ffs() with __ffs()

[linux-2.6-omap-h63xx.git] / drivers / serial / sh-sci.c

diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 0a34fa9e07336082a2e8ce3f3924178ff256299b..73440e26834beb8d09cd6b07edb0dd1e8b73208a 100644 (file)
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -4,6 +4,7 @@
  * 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:
  *
@@ -12,6 +13,7 @@
  *   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
@@ -77,6 +79,11 @@ struct sci_port {
        /* Break timer */
        struct timer_list       break_timer;
        int                     break_flag;
+
+#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)
+       /* Port clock */
+       struct clk              *clk;
+#endif
 };
 
 #ifdef CONFIG_SH_KGDB
@@ -284,13 +291,7 @@ static void sci_init_pins_irda(struct uart_port *port, unsigned int cflag)
 #endif
 
 #if defined(SCIF_ONLY) || defined(SCI_AND_SCIF)
-#if defined(CONFIG_CPU_SUBTYPE_SH7300) 
-/* SH7300 doesn't use RTS/CTS */
-static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
-{
-       sci_out(port, SCFCR, 0);
-}
-#elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
+#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;
@@ -301,6 +302,38 @@ static void sci_init_pins_scif(struct uart_port* port, unsigned int cflag)
        }
        sci_out(port, SCFCR, fcr_val);
 }
+#elif defined(CONFIG_CPU_SUBTYPE_SH7720)
+static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
+{
+       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)
@@ -362,7 +395,9 @@ static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
        } else {
 #ifdef CONFIG_CPU_SUBTYPE_SH7343
                /* Nothing */
-#elif defined(CONFIG_CPU_SUBTYPE_SH7780) || defined(CONFIG_CPU_SUBTYPE_SH7785)
+#elif 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 */
@@ -955,6 +990,10 @@ static int sci_startup(struct uart_port *port)
        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);
@@ -972,6 +1011,11 @@ static void sci_shutdown(struct uart_port *port)
 
        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,
@@ -990,9 +1034,7 @@ 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
@@ -1225,6 +1267,11 @@ static int __init serial_console_setup(struct console *co, char *options)
 
        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);
 
@@ -1262,7 +1309,7 @@ static int __init sci_console_init(void)
 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
@@ -1320,9 +1367,7 @@ int __init kgdb_console_setup(struct console *co, char *options)
 
        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,
@@ -1418,7 +1463,7 @@ static int __devinit sci_probe(struct platform_device *dev)
 
 #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