150 lines
4.5 KiB
Diff
150 lines
4.5 KiB
Diff
From 2a1042fc56273fac721207597968af313751c17b Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Wed, 2 Jul 2008 22:43:53 +0100
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Subject: [PATCH] fix-gsm-resume-problems.patch
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/plat-s3c24xx/neo1973_pm_gsm.c | 32 ++++++++++++++++++++++++++++++++
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drivers/serial/s3c2410.c | 17 +++++++++++++++++
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2 files changed, 49 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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index 149b866..d70a481 100644
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--- a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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@@ -18,6 +18,7 @@
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#include <linux/console.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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+#include <linux/resume-dependency.h>
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#include <asm/gpio.h>
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#include <asm/mach-types.h>
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@@ -33,9 +34,12 @@
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struct gta01pm_priv {
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int gpio_ngsm_en;
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int gpio_ndl_gsm;
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+
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struct console *con;
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};
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+struct resume_dependency resume_dep_gsm_uart;
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+
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static struct gta01pm_priv gta01_gsm;
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static struct console *find_s3c24xx_console(void)
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@@ -179,6 +183,21 @@ static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
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static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
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#ifdef CONFIG_PM
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+static void gsm_resume_work(struct work_struct *w)
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+{
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+ printk(KERN_INFO "%s: waiting...\n", __FUNCTION__);
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+ if (gsm_autounlock_delay)
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+ msleep(gsm_autounlock_delay);
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+ if (gsm_auto_flowcontrolled) {
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+ if (machine_is_neo1973_gta01())
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+ s3c24xx_fake_rx_interrupt(10000);
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+ s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
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+ gsm_auto_flowcontrolled = 0;
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+ }
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+ printk(KERN_INFO "%s: done.\n", __FUNCTION__);
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+}
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+
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+static int gta01_gsm_resume(struct platform_device *pdev);
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static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
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{
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/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
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@@ -189,11 +208,22 @@ static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
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if (machine_is_neo1973_gta02())
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s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
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+ /* register our resume dependency on the appropriate UART being up */
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+ resume_dep_gsm_uart.callback = gta01_gsm_resume;
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+ resume_dep_gsm_uart.context = (void *)pdev;
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+
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+ s3c24xx_serial_register_resume_dependency(&resume_dep_gsm_uart, 0);
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+
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return 0;
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}
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static int gta01_gsm_resume(struct platform_device *pdev)
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{
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+ if (resume_dep_gsm_uart.called_flag != 1)
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+ return 0;
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+
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+ resume_dep_gsm_uart.called_flag++; /* only run once */
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+
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/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
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* don't need to do much here. */
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@@ -279,6 +309,8 @@ static int __init gta01_gsm_probe(struct platform_device *pdev)
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if (machine_is_neo1973_gta02())
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s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
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+ init_resume_dependency_list(&resume_dep_gsm_uart);
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+
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return sysfs_create_group(&pdev->dev.kobj, >a01_gsm_attr_group);
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}
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diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c
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index b566f42..bc6736d 100644
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--- a/drivers/serial/s3c2410.c
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+++ b/drivers/serial/s3c2410.c
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@@ -72,6 +72,7 @@
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#include <linux/serial.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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+#include <linux/resume-dependency.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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@@ -112,6 +113,8 @@ struct s3c24xx_uart_port {
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struct clk *clk;
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struct clk *baudclk;
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struct uart_port port;
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+
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+ struct resume_dependency resume_dependency;
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};
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@@ -1085,6 +1088,8 @@ static int s3c24xx_serial_probe(struct platform_device *dev,
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ourport = &s3c24xx_serial_ports[probe_index];
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probe_index++;
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+ init_resume_dependency_list(&ourport->resume_dependency);
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+
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dbg("%s: initialising port %p...\n", __FUNCTION__, ourport);
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ret = s3c24xx_serial_init_port(ourport, info, dev);
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@@ -1125,6 +1130,16 @@ static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t stat
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return 0;
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}
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+void s3c24xx_serial_register_resume_dependency(struct resume_dependency *
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+ resume_dependency, int uart_index)
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+{
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+ struct s3c24xx_uart_port *ourport = &s3c24xx_serial_ports[uart_index];
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+
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+ register_resume_dependency(&ourport->resume_dependency,
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+ resume_dependency);
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+}
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+EXPORT_SYMBOL(s3c24xx_serial_register_resume_dependency);
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+
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static int s3c24xx_serial_resume(struct platform_device *dev)
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{
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struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
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@@ -1138,6 +1153,8 @@ static int s3c24xx_serial_resume(struct platform_device *dev)
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uart_resume_port(&s3c24xx_uart_drv, port);
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}
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+ callback_all_resume_dependencies(&ourport->resume_dependency);
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+
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return 0;
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}
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--
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1.5.6.5
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