--- /dev/null
+--- linux-2.6.23/arch/arm/common/gta01_pm_gsm.c.orig 2007-10-30 23:29:53.000000000 -0500
++++ linux-2.6.23/arch/arm/common/gta01_pm_gsm.c 2007-10-30 23:35:44.000000000 -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-2.6.23/drivers/serial/s3c2410.c.orig 2007-10-30 23:31:59.000000000 -0500
++++ linux-2.6.23/drivers/serial/s3c2410.c 2007-10-30 23:35:44.000000000 -0500
+@@ -80,6 +80,8 @@
+
+ #include <asm/plat-s3c/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;
git.openpandora.org / openembedded.git / commitdiff