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--- linux-2.6.22.5/arch/arm/common/gta01_pm_gsm.c.orig 2007-09-27 11:23:20.000000000 -0500
+++ linux-2.6.22.5/arch/arm/common/gta01_pm_gsm.c 2007-09-27 21:09:00.000000000 -0500
@@ -23,6 +23,9 @@
#include <asm/arch/gta01.h>
#include <asm/arch/gta02.h>
+#include <linux/serial_core.h>
+void s3c24xx_set_flow_control(struct uart_port *port, int fc_on);
+
struct gta01pm_priv {
int gpio_ngsm_en;
struct console *con;
@@ -49,6 +52,23 @@
static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
char *buf)
{
+ struct uart_driver *udrive = NULL;
+ struct uart_state *ustate = NULL;
+ struct uart_port *uport = NULL;
+
+ if (gta01_gsm.con) {
+ udrive = gta01_gsm.con->data;
+ if (udrive) {
+ ustate = udrive->state;
+ if (ustate) {
+ uport = ustate->port;
+ }
+ }
+ }
+ printk("gsm: gsm_read of \"%s\"\n", attr->attr.name);
+ printk("gsm: con=%p udrive=%p ustate=%p uport=%p\n",
+ gta01_gsm.con, udrive, ustate, uport);
+
if (!strcmp(attr->attr.name, "power_on")) {
if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON))
goto out_1;
@@ -58,6 +78,24 @@
} else if (!strcmp(attr->attr.name, "download")) {
if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_DNLOAD))
goto out_1;
+ } else if (!strcmp(attr->attr.name, "flowcontrol")) {
+ if (uport) {
+ if (uport->unused[2] & 0x2) {
+ if (uport->unused[2] & 0x1) {
+ printk("gsm: flow control allowed and on\n");
+ goto out_1;
+ } else {
+ printk("gsm: flow control allowed and not on\n");
+ }
+ } else {
+ if (uport->unused[2] & 0x1)
+ printk("gsm: flow control not allowed, "
+ "but is pending\n");
+ else
+ printk("gsm: flow control not allowed, "
+ "not pending\n");
+ }
+ }
}
return strlcpy(buf, "0\n", 3);
@@ -68,10 +106,26 @@
static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
+ struct uart_driver *udrive = NULL;
+ struct uart_state *ustate = NULL;
+ struct uart_port *uport = NULL;
+ static int was_on = 0;
unsigned long on = simple_strtoul(buf, NULL, 10);
+ if (gta01_gsm.con) {
+ udrive = gta01_gsm.con->data;
+ if (udrive) {
+ ustate = udrive->state;
+ if (ustate) {
+ uport = ustate->port;
+ }
+ }
+ }
+ printk("gsm: con=%p udrive=%p ustate=%p uport=%p\n",
+ gta01_gsm.con, udrive, ustate, uport);
+
if (!strcmp(attr->attr.name, "power_on")) {
- if (on) {
+ if (on && !was_on) {
if (gta01_gsm.con) {
dev_info(dev, "powering up GSM, thus "
"disconnecting serial console\n");
@@ -83,7 +137,24 @@
s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 0);
s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 1);
- } else {
+
+ if (uport) {
+ /* set any pending flow-control mode */
+ uport->unused[2] |= 0x2;
+ s3c24xx_set_flow_control(uport,
+ (uport->unused[2] & 0x1));
+ dev_info(dev, "flow control allowed\n");
+ }
+
+ was_on = 1;
+
+ } else if (!on && was_on) {
+ if (uport) {
+ uport->unused[2] &= ~0x2;
+ s3c24xx_set_flow_control(uport, 0);
+ dev_info(dev, "flow control not allowed\n");
+ }
+
s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 0);
if (gta01_gsm.gpio_ngsm_en)
@@ -95,6 +166,8 @@
dev_info(dev, "powered down GSM, thus enabling "
"serial console\n");
}
+
+ was_on = 0;
}
} else if (!strcmp(attr->attr.name, "reset")) {
s3c2410_gpio_setpin(GTA01_GPIO_MODEM_RST, on);
@@ -105,6 +178,7 @@
return count;
}
+static DEVICE_ATTR(flowcontrol, 0644, gsm_read, gsm_write);
static DEVICE_ATTR(power_on, 0644, gsm_read, gsm_write);
static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
@@ -136,6 +210,7 @@
#endif
static struct attribute *gta01_gsm_sysfs_entries[] = {
+ &dev_attr_flowcontrol.attr,
&dev_attr_power_on.attr,
&dev_attr_reset.attr,
NULL,
--- linux-2.6.22.5/drivers/serial/s3c2410.c.orig 2007-09-27 11:23:27.000000000 -0500
+++ linux-2.6.22.5/drivers/serial/s3c2410.c 2007-09-27 21:07:21.000000000 -0500
@@ -80,6 +80,8 @@
#include <asm/arch/regs-serial.h>
#include <asm/arch/regs-gpio.h>
+#include <asm/mach-types.h>
+#include <asm/arch/gta01.h>
/* structures */
@@ -729,6 +731,17 @@
return best->quot;
}
+/* This routine is called whenever the gta01 modem/console switches */
+void s3c24xx_set_flow_control(struct uart_port *port, int fc_on)
+{
+ unsigned int umcon;
+ if (machine_is_neo1973_gta01() && port) {
+ umcon = (fc_on) ? S3C2410_UMCOM_AFC : 0;
+ wr_regl(port, S3C2410_UMCON, umcon);
+ }
+}
+EXPORT_SYMBOL(s3c24xx_set_flow_control);
+
static void s3c24xx_serial_set_termios(struct uart_port *port,
struct ktermios *termios,
struct ktermios *old)
@@ -803,6 +816,23 @@
umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0;
+ /*
+ * Custom handling of flow control on hwport 0 for the GTA01:
+ * Save the desired state for flow control, but if the port
+ * is being used as a console, then do not actually enable
+ * flow control unless the flag permiting us to do so is set.
+ */
+ if (machine_is_neo1973_gta01() && (cfg->hwport == 0)) {
+ if (umcon)
+ port->unused[2] |= 0x1;
+ else
+ port->unused[2] &= ~0x1;
+ if (port->cons && (port->cons->index >= 0)) {
+ if (!(port->unused[2] & 0x2))
+ umcon = 0;
+ }
+ }
+
if (termios->c_cflag & PARENB) {
if (termios->c_cflag & PARODD)
ulcon |= S3C2410_LCON_PODD;
|
