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authorLinus Torvalds <torvalds@linux-foundation.org>2011-08-29 13:34:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-08-29 13:34:48 -0700
commitc42a2634d8495a764e918a8c4252c100ef23b369 (patch)
treec3003ae880afb1a98c4554311aa068656cc7bf37 /drivers
parentf9557a4477140d2aa6845d310edbdeff735c80e1 (diff)
parent21d41f2b312231536cf981c960c83cc4493c0293 (diff)
Merge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x: sh: fix the compile error in setup-sh7757.c serial: sh-sci: report CTS as active for get_mctrl sh: Add unaligned memory access for PC relative intructions sh: Fix unaligned memory access for branches without delay slots sh: Fix up fallout from cpuidle changes. serial: sh-sci: console Runtime PM support sh: Fix conflicting definitions of ptrace_triggered serial: sh-sci: fix DMA build by including dma-mapping.h serial: sh-sci: Fix up default regtype probing. sh: intc: enable both edges GPIO interrupts on sh7372 shwdt: fix usage of mod_timer clocksource: sh_cmt: wait for CMCNT on init V2
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clocksource/sh_cmt.c34
-rw-r--r--drivers/sh/intc/chip.c3
-rw-r--r--drivers/tty/serial/sh-sci.c71
3 files changed, 95 insertions, 13 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index dc7c033ef58..32a77becc09 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -26,6 +26,7 @@
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/err.h>
+#include <linux/delay.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/sh_timer.h>
@@ -150,13 +151,13 @@ static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
{
- int ret;
+ int k, ret;
/* enable clock */
ret = clk_enable(p->clk);
if (ret) {
dev_err(&p->pdev->dev, "cannot enable clock\n");
- return ret;
+ goto err0;
}
/* make sure channel is disabled */
@@ -174,9 +175,38 @@ static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
sh_cmt_write(p, CMCOR, 0xffffffff);
sh_cmt_write(p, CMCNT, 0);
+ /*
+ * According to the sh73a0 user's manual, as CMCNT can be operated
+ * only by the RCLK (Pseudo 32 KHz), there's one restriction on
+ * modifying CMCNT register; two RCLK cycles are necessary before
+ * this register is either read or any modification of the value
+ * it holds is reflected in the LSI's actual operation.
+ *
+ * While at it, we're supposed to clear out the CMCNT as of this
+ * moment, so make sure it's processed properly here. This will
+ * take RCLKx2 at maximum.
+ */
+ for (k = 0; k < 100; k++) {
+ if (!sh_cmt_read(p, CMCNT))
+ break;
+ udelay(1);
+ }
+
+ if (sh_cmt_read(p, CMCNT)) {
+ dev_err(&p->pdev->dev, "cannot clear CMCNT\n");
+ ret = -ETIMEDOUT;
+ goto err1;
+ }
+
/* enable channel */
sh_cmt_start_stop_ch(p, 1);
return 0;
+ err1:
+ /* stop clock */
+ clk_disable(p->clk);
+
+ err0:
+ return ret;
}
static void sh_cmt_disable(struct sh_cmt_priv *p)
diff --git a/drivers/sh/intc/chip.c b/drivers/sh/intc/chip.c
index f33e2dd9793..33b2ed451e0 100644
--- a/drivers/sh/intc/chip.c
+++ b/drivers/sh/intc/chip.c
@@ -186,6 +186,9 @@ static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
!defined(CONFIG_CPU_SUBTYPE_SH7709)
[IRQ_TYPE_LEVEL_HIGH] = VALID(3),
#endif
+#if defined(CONFIG_ARCH_SH7372)
+ [IRQ_TYPE_EDGE_BOTH] = VALID(4),
+#endif
};
static int intc_set_type(struct irq_data *data, unsigned int type)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index a9414facda4..5ea6ec3442e 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;
@@ -2037,7 +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);
}
@@ -2080,6 +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
@@ -2089,6 +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 */
@@ -2204,6 +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,
};