[s3c24xx] Fix freerunner gsm modem pm.
authorLars-Peter Clausen <lars@metafoo.de>
Sun, 28 Jun 2009 20:25:00 +0000 (20:25 +0000)
committerLars-Peter Clausen <lars@metafoo.de>
Sun, 28 Jun 2009 20:25:00 +0000 (20:25 +0000)
SVN-Revision: 16609

target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c
target/linux/s3c24xx/patches-2.6.30/110-serial.patch [new file with mode: 0644]

index 2f1da04..afb4182 100644 (file)
@@ -19,7 +19,6 @@
 #include <linux/errno.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
-#include <linux/gta02-shadow.h>
 
 #include <mach/gpio.h>
 #include <asm/mach-types.h>
 #include <linux/mfd/pcf50633/gpio.h>
 #include <mach/regs-gpio.h>
 #include <mach/regs-gpioj.h>
+#include <linux/gta02-shadow.h>
 
 int gta_gsm_interrupts;
 EXPORT_SYMBOL(gta_gsm_interrupts);
 
+extern void s3c24xx_serial_console_set_silence(int);
+
 struct gta02pm_priv {
        int gpio_ndl_gsm;
+       struct console *con;
 };
 
 static struct gta02pm_priv gta02_gsm;
 
+static struct console *find_s3c24xx_console(void)
+{
+       struct console *con;
+
+       acquire_console_sem();
+
+       for (con = console_drivers; con; con = con->next) {
+               if (!strcmp(con->name, "ttySAC"))
+                       break;
+       }
+
+       release_console_sem();
+
+       return con;
+}
+
 static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
                        char *buf)
 {
@@ -63,19 +82,30 @@ out_1:
 static void gsm_on_off(struct device *dev, int on)
 {
        if (!on) {
-               /*
-                * Do not drive into powered-down GSM side
-                * GTA02 only, because on GTA01 maybe serial
-                * is used otherwise.
-                */
                s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPIO_INPUT);
                s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPIO_INPUT);
 
                pcf50633_gpio_set(gta02_pcf, PCF50633_GPIO2, 0);
 
+               if (gta02_gsm.con) {
+                       s3c24xx_serial_console_set_silence(0);
+                       console_start(gta02_gsm.con);
+
+                       dev_dbg(dev, "powered down gta02 GSM, enabling "
+                                       "serial console\n");
+               }
+
                return;
        }
 
+       if (gta02_gsm.con) {
+               dev_dbg(dev, "powering up GSM, thus "
+                               "disconnecting serial console\n");
+
+               console_stop(gta02_gsm.con);
+               s3c24xx_serial_console_set_silence(1);
+       }
+
        /* allow UART to talk to GSM side now we will power it */
        s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
        s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPH2_TXD0);
@@ -84,6 +114,10 @@ static void gsm_on_off(struct device *dev, int on)
 
        msleep(100);
 
+       gta02_gpb_setpin(GTA02_GPIO_MODEM_ON, 1);
+       msleep(500);
+       gta02_gpb_setpin(GTA02_GPIO_MODEM_ON, 0);
+
        /*
         * workaround for calypso firmware moko10 and earlier,
         * without this it will leave IRQ line high after
@@ -188,6 +222,11 @@ static int gta02_gsm_resume(struct platform_device *pdev)
        /* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
         * don't need to do much here. */
 
+       /* Make sure that the kernel console on the serial port is still
+        * disabled. FIXME: resume ordering race with serial driver! */
+       if (gta02_gsm.con && s3c2410_gpio_getpin(GTA02_GPIO_MODEM_ON))
+               console_stop(gta02_gsm.con);
+
        s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, gta02_gsm.gpio_ndl_gsm);
 
        return 0;
@@ -222,13 +261,17 @@ static int __init gta02_gsm_probe(struct platform_device *pdev)
        case GTA02v6_SYSTEM_REV:
                break;
        default:
-               /* TODO: fail */
-               dev_warn(&pdev->dev, "Unknown Neo1973 Revision 0x%x, "
+               dev_warn(&pdev->dev, "Unknown Freerunner Revision 0x%x, "
                         "some PM features not available!!!\n",
                         system_rev);
                break;
        }
 
+       gta02_gsm.con = find_s3c24xx_console();
+       if (!gta02_gsm.con)
+               dev_warn(&pdev->dev,
+                        "cannot find S3C24xx console driver\n");
+
        /* note that download initially disabled, and enforce that */
        gta02_gsm.gpio_ndl_gsm = 1;
        s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
diff --git a/target/linux/s3c24xx/patches-2.6.30/110-serial.patch b/target/linux/s3c24xx/patches-2.6.30/110-serial.patch
new file mode 100644 (file)
index 0000000..edb3aa5
--- /dev/null
@@ -0,0 +1,40 @@
+diff -urNX /opt/Projects/openmoko-linux-2.6/orig/dontdiff /opt/Projects/openmoko-linux-2.6/orig/linux-2.6.29-rc3/drivers/serial/samsung.c /opt/Projects/openmoko-linux-2.6/drivers/serial/samsung.c
+--- a/drivers/serial/samsung.c 2009-01-28 19:49:30.000000000 +0100
++++ b/drivers/serial/samsung.c 2009-05-16 13:25:47.000000000 +0200
+@@ -1208,6 +1355,13 @@
+ #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
+ static struct uart_port *cons_uart;
++static int cons_silenced;
++
++void s3c24xx_serial_console_set_silence(int silenced)
++{
++      cons_silenced = silenced;
++}
++EXPORT_SYMBOL(s3c24xx_serial_console_set_silence);
+ static int
+ s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
+@@ -1232,9 +1386,21 @@
+ s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
+ {
+       unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
++      unsigned int umcon = rd_regl(cons_uart, S3C2410_UMCON);
++
++      if (cons_silenced)
++              return;
++
++      /* If auto HW flow control enabled, temporarily turn it off */
++      if (umcon & S3C2410_UMCOM_AFC)
++              wr_regl(port, S3C2410_UMCON, (umcon & !S3C2410_UMCOM_AFC));
++
+       while (!s3c24xx_serial_console_txrdy(port, ufcon))
+               barrier();
+       wr_regb(cons_uart, S3C2410_UTXH, ch);
++
++      if (umcon & S3C2410_UMCOM_AFC)
++              wr_regl(port, S3C2410_UMCON, umcon);
+ }
+ static void
+