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Date: Fri, 11 Mar 2011 21:58:11 +0900
From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
To: gregkh@...e.de
Cc: linux-kernel@...r.kernel.org, arnd@...db.de,
Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
Subject: [PATCH 2/3] tty: serial: Fix build on architecture that does not have ioport
Some CPU's do not have ioport. Therefore, these do not have inX/outX.
This adds CONFIG_SERIAL_8250_IOPORT. When this is enable, 8250 driver
provides ioports access. And this is not enable with the CPU without
ioports.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
---
drivers/tty/serial/8250.c | 56 ++++++++++++++++---------------------
drivers/tty/serial/8250_early.c | 4 +++
drivers/tty/serial/Kconfig | 10 +++++++
drivers/tty/serial/serial_core.c | 4 +++
4 files changed, 42 insertions(+), 32 deletions(-)
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 762a253..837bb39 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -387,7 +387,7 @@ static inline int map_8250_out_reg(struct uart_port *p, int offset)
#endif
-#if CONFIG_SERIAL_8250_HUB6
+#ifdef CONFIG_SERIAL_8250_HUB6
static unsigned int hub6_serial_in(struct uart_port *p, int offset)
{
offset = map_8250_in_reg(p, offset) << p->regshift;
@@ -492,7 +492,7 @@ static void dwapb32_serial_out(struct uart_port *p, int offset, int value)
writel(value, p->membase + offset);
dwapb_check_clear_ier(p, save_offset);
}
-
+#ifdef CONFIG_SERIAL_8250_IOPORT
static unsigned int io_serial_in(struct uart_port *p, int offset)
{
offset = map_8250_in_reg(p, offset) << p->regshift;
@@ -504,13 +504,14 @@ static void io_serial_out(struct uart_port *p, int offset, int value)
offset = map_8250_out_reg(p, offset) << p->regshift;
outb(value, p->iobase + offset);
}
+#endif
static void set_io_from_upio(struct uart_port *p)
{
struct uart_8250_port *up =
container_of(p, struct uart_8250_port, port);
switch (p->iotype) {
-#if CONFIG_SERIAL_8250_HUB6
+#ifdef CONFIG_SERIAL_8250_HUB6
case UPIO_HUB6:
p->serial_in = hub6_serial_in;
p->serial_out = hub6_serial_out;
@@ -549,8 +550,10 @@ static void set_io_from_upio(struct uart_port *p)
break;
default:
+#ifdef CONFIG_SERIAL_8250_IOPORT
p->serial_in = io_serial_in;
p->serial_out = io_serial_out;
+#endif
break;
}
/* Remember loaded iotype */
@@ -2542,12 +2545,11 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
}
}
break;
-#if CONFIG_SERIAL_8250_HUB6
- case UPIO_HUB6:
-#endif
- case UPIO_PORT:
+ default: /* UPIO_HUB6 or UPIO_PORT */
+#if defined(CONFIG_SERIAL_8250_HUB6) || defined(CONFIG_SERIAL_8250_IOPORT)
if (!request_region(up->port.iobase, size, "serial"))
ret = -EBUSY;
+#endif
break;
}
return ret;
@@ -2575,50 +2577,40 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
release_mem_region(up->port.mapbase, size);
break;
-#if CONFIG_SERIAL_8250_HUB6
- case UPIO_HUB6:
-#endif
- case UPIO_PORT:
+ default: /* UPIO_HUB6 or UPIO_PORT */
+#if defined(CONFIG_SERIAL_8250_HUB6) || defined(CONFIG_SERIAL_8250_IOPORT)
release_region(up->port.iobase, size);
+#endif
break;
}
}
static int serial8250_request_rsa_resource(struct uart_8250_port *up)
{
+ int ret = -EINVAL;
+
+#if defined(CONFIG_SERIAL_8250_HUB6) || defined(CONFIG_SERIAL_8250_IOPORT)
unsigned long start = UART_RSA_BASE << up->port.regshift;
unsigned int size = 8 << up->port.regshift;
- int ret = -EINVAL;
- switch (up->port.iotype) {
-#if CONFIG_SERIAL_8250_HUB6
- case UPIO_HUB6:
+ /* up->port.iotype are UPIO_HUB6 or UPIO_PORT */
+ start += up->port.iobase;
+ if (request_region(start, size, "serial-rsa"))
+ ret = 0;
+ else
+ ret = -EBUSY;
#endif
- case UPIO_PORT:
- start += up->port.iobase;
- if (request_region(start, size, "serial-rsa"))
- ret = 0;
- else
- ret = -EBUSY;
- break;
- }
-
return ret;
}
static void serial8250_release_rsa_resource(struct uart_8250_port *up)
{
+#if defined(CONFIG_SERIAL_8250_HUB6) || defined(CONFIG_SERIAL_8250_IOPORT)
unsigned long offset = UART_RSA_BASE << up->port.regshift;
unsigned int size = 8 << up->port.regshift;
-
- switch (up->port.iotype) {
-#if CONFIG_SERIAL_8250_HUB6
- case UPIO_HUB6:
+ /* up->port.iotype are UPIO_HUB6 or UPIO_PORT */
+ release_region(up->port.iobase + offset, size);
#endif
- case UPIO_PORT:
- release_region(up->port.iobase + offset, size);
- break;
- }
}
static void serial8250_release_port(struct uart_port *port)
diff --git a/drivers/tty/serial/8250_early.c b/drivers/tty/serial/8250_early.c
index eaafb98..6eae7a3 100644
--- a/drivers/tty/serial/8250_early.c
+++ b/drivers/tty/serial/8250_early.c
@@ -55,8 +55,10 @@ static unsigned int __init serial_in(struct uart_port *port, int offset)
return readb(port->membase + offset);
case UPIO_MEM32:
return readl(port->membase + (offset << 2));
+#if CONFIG_SERIAL_8250_IOPORT
case UPIO_PORT:
return inb(port->iobase + offset);
+#endif
default:
return 0;
}
@@ -71,9 +73,11 @@ static void __init serial_out(struct uart_port *port, int offset, int value)
case UPIO_MEM32:
writel(value, port->membase + (offset << 2));
break;
+#if CONFIG_SERIAL_8250_IOPORT
case UPIO_PORT:
outb(value, port->iobase + offset);
break;
+#endif
}
}
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 2b83346..6fd5825 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -116,6 +116,16 @@ config SERIAL_8250_CS
If unsure, say N.
+config CONFIG_SERIAL_8250_IOPORT
+ bool "8250/16550 serial IOports access support"
+ depends on SERIAL_8250 && NO_IOPORT != y
+ default SERIAL_8250
+ help
+ Say Y here to enable support for serial ioport access.
+ If there is not ioport, cannot be enable this.
+
+ If unsure, say N.
+
config SERIAL_8250_NR_UARTS
int "Maximum number of 8250/16550 serial ports"
depends on SERIAL_8250
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index c533524..ad5b215 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2126,9 +2126,11 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
char address[64];
switch (port->iotype) {
+#if CONFIG_SERIAL_8250_IOPORT
case UPIO_PORT:
snprintf(address, sizeof(address), "I/O 0x%lx", port->iobase);
break;
+#endif
#if CONFIG_SERIAL_8250_HUB6
case UPIO_HUB6:
snprintf(address, sizeof(address),
@@ -2551,8 +2553,10 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2)
return 0;
switch (port1->iotype) {
+#if CONFIG_SERIAL_8250_IOPORT
case UPIO_PORT:
return (port1->iobase == port2->iobase);
+#endif
#if CONFIG_SERIAL_8250_HUB6
case UPIO_HUB6:
return (port1->iobase == port2->iobase) &&
--
1.7.2.3
--
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