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path: root/drivers/tty/serial/sh-sci.c
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Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
-rw-r--r--drivers/tty/serial/sh-sci.c72
1 files changed, 61 insertions, 11 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 2ec57b2fb278..5ea6ec3442e6 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -47,6 +47,7 @@
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
@@ -95,6 +96,12 @@ struct sci_port {
#endif
struct notifier_block freq_transition;
+
+#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
+ unsigned short saved_smr;
+ unsigned short saved_fcr;
+ unsigned char saved_brr;
+#endif
};
/* Function prototypes */
@@ -1076,7 +1083,7 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
/* This routine is used for getting signals of: DTR, DCD, DSR, RI,
and CTS/RTS */
- return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
+ return TIOCM_DTR | TIOCM_RTS | TIOCM_CTS | TIOCM_DSR;
}
#ifdef CONFIG_SERIAL_SH_SCI_DMA
@@ -1633,11 +1640,25 @@ static unsigned int sci_scbrr_calc(unsigned int algo_id, unsigned int bps,
return ((freq + 16 * bps) / (32 * bps) - 1);
}
+static void sci_reset(struct uart_port *port)
+{
+ unsigned int status;
+
+ do {
+ status = sci_in(port, SCxSR);
+ } while (!(status & SCxSR_TEND(port)));
+
+ sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
+
+ if (port->type != PORT_SCI)
+ sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
+}
+
static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct sci_port *s = to_sci_port(port);
- unsigned int status, baud, smr_val, max_baud;
+ unsigned int baud, smr_val, max_baud;
int t = -1;
u16 scfcr = 0;
@@ -1657,14 +1678,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
sci_port_enable(s);
- do {
- status = sci_in(port, SCxSR);
- } while (!(status & SCxSR_TEND(port)));
-
- sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
-
- if (port->type != PORT_SCI)
- sci_out(port, SCFCR, scfcr | SCFCR_RFRST | SCFCR_TFRST);
+ sci_reset(port);
smr_val = sci_in(port, SCSMR) & 3;
@@ -1913,6 +1927,7 @@ static int __devinit sci_init_single(struct platform_device *dev,
port->dev = &dev->dev;
+ pm_runtime_irq_safe(&dev->dev);
pm_runtime_enable(&dev->dev);
}
@@ -2036,7 +2051,8 @@ static int __devinit serial_console_setup(struct console *co, char *options)
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
- /* TODO: disable clock */
+ sci_port_disable(sci_port);
+
return uart_set_options(port, co, baud, parity, bits, flow);
}
@@ -2079,6 +2095,36 @@ static int __devinit sci_probe_earlyprintk(struct platform_device *pdev)
return 0;
}
+#define uart_console(port) ((port)->cons->index == (port)->line)
+
+static int sci_runtime_suspend(struct device *dev)
+{
+ struct sci_port *sci_port = dev_get_drvdata(dev);
+ struct uart_port *port = &sci_port->port;
+
+ if (uart_console(port)) {
+ sci_port->saved_smr = sci_in(port, SCSMR);
+ sci_port->saved_brr = sci_in(port, SCBRR);
+ sci_port->saved_fcr = sci_in(port, SCFCR);
+ }
+ return 0;
+}
+
+static int sci_runtime_resume(struct device *dev)
+{
+ struct sci_port *sci_port = dev_get_drvdata(dev);
+ struct uart_port *port = &sci_port->port;
+
+ if (uart_console(port)) {
+ sci_reset(port);
+ sci_out(port, SCSMR, sci_port->saved_smr);
+ sci_out(port, SCBRR, sci_port->saved_brr);
+ sci_out(port, SCFCR, sci_port->saved_fcr);
+ sci_out(port, SCSCR, sci_port->cfg->scscr);
+ }
+ return 0;
+}
+
#define SCI_CONSOLE (&serial_console)
#else
@@ -2088,6 +2134,8 @@ static inline int __devinit sci_probe_earlyprintk(struct platform_device *pdev)
}
#define SCI_CONSOLE NULL
+#define sci_runtime_suspend NULL
+#define sci_runtime_resume NULL
#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
@@ -2203,6 +2251,8 @@ static int sci_resume(struct device *dev)
}
static const struct dev_pm_ops sci_dev_pm_ops = {
+ .runtime_suspend = sci_runtime_suspend,
+ .runtime_resume = sci_runtime_resume,
.suspend = sci_suspend,
.resume = sci_resume,
};