shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 03:40:35 +09:00
Code Issues Packages Projects Releases Wiki Activity

rk_serial:in some case, set uart rx as gpio interrupt to wake up arm, when arm suspends

Browse Source
This commit is contained in:
hhb
2013-10-19 14:22:25 +08:00
parent 7cd6c5c211
commit cfc366f696
2 changed files with 173 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/tty/serial/Kconfig
View File

@@ -1533,6 +1533,11 @@ config UART0_DMA_RK29
1:enable dma tx
2:enable dma rx
3:both enable dma tx and rx
config UART0_WAKEUP_RK29
bool "Serial port 0 WAKEUP support (EXPERIMENTAL)"
depends on UART0_RK29
default 0
config UART1_RK29
bool "Serial port 1 support"
depends on SERIAL_RK29
@@ -1549,6 +1554,11 @@ config UART1_DMA_RK29
1:enable dma tx
2:enable dma rx
3:both enable dma tx and rx
config UART1_WAKEUP_RK29
bool "Serial port 1 WAKEUP support (EXPERIMENTAL)"
depends on UART1_RK29
default 0
config UART2_RK29
bool "Serial port 2 support"
depends on SERIAL_RK29
@@ -1565,6 +1575,11 @@ config UART2_DMA_RK29
1:enable dma tx
2:enable dma rx
3:both enable dma tx and rx
config UART2_WAKEUP_RK29
bool "Serial port 2 WAKEUP support (EXPERIMENTAL)"
depends on UART2_RK29
default 0
config UART3_RK29
bool "Serial port 3 support"
depends on SERIAL_RK29 && !ARCH_RK2928 && !ARCH_RK3026
@@ -1580,7 +1595,12 @@ config UART3_DMA_RK29
help
1:enable dma tx
2:enable dma rx
3:both enable dma tx and rx
3:both enable dma tx and rx
config UART3_WAKEUP_RK29
bool "Serial port 3 WAKEUP support (EXPERIMENTAL)"
depends on UART3_RK29
default 0
config SERIAL_RK29_CONSOLE
bool "Serial console support"
depends on SERIAL_RK29=y

158
drivers/tty/serial/rk_serial.c
View File

@@ -66,8 +66,10 @@
UART_LSR_THRE doesn't. So, the macro BOTH_EMPTY should be replaced with UART_LSR_TEMT.
*v1.4 : 2013-04-16
* 1.fix bug dma buffer free error
*v1.5 : 2013-10-17
* 1.in some case, set uart rx as gpio interrupt to wake up arm, when arm suspends
*/
#define VERSION_AND_TIME "rk_serial.c v1.4 2013-04-16"
#define VERSION_AND_TIME "rk_serial.c v1.5 2013-10-17"
#define PORT_RK 90
#define UART_USR 0x1F /* UART Status Register */
@@ -111,6 +113,30 @@
#define UART3_USE_DMA CLOSE_DMA
#endif
//serial wake up
#ifdef CONFIG_UART0_WAKEUP_RK29
#define UART0_USE_WAKEUP CONFIG_UART0_WAKEUP_RK29
#else
#define UART0_USE_WAKEUP 0
#endif
#ifdef CONFIG_UART1_WAKEUP_RK29
#define UART1_USE_WAKEUP CONFIG_UART1_WAKEUP_RK29
#else
#define UART1_USE_WAKEUP 0
#endif
#ifdef CONFIG_UART2_WAKEUP_RK29
#define UART2_USE_WAKEUP CONFIG_UART2_WAKEUP_RK29
#else
#define UART2_USE_WAKEUP 0
#endif
#ifdef CONFIG_UART3_WAKEUP_RK29
#define UART3_USE_WAKEUP CONFIG_UART3_WAKEUP_RK29
#else
#define UART3_USE_WAKEUP 0
#endif
#define USE_TIMER 1 // use timer for dma transport
#define POWER_MANEGEMENT 1
#define RX_TIMEOUT (3000*3) //uint ms
@@ -119,6 +145,8 @@
#define USE_DMA (UART0_USE_DMA | UART1_USE_DMA | UART2_USE_DMA | UART3_USE_DMA)
#define USE_WAKEUP (UART0_USE_WAKEUP | UART1_USE_WAKEUP | UART2_USE_WAKEUP | UART3_USE_WAKEUP)
#if USE_DMA
#ifdef CONFIG_ARCH_RK29
#include <mach/dma-pl330.h>
@@ -127,6 +155,11 @@
#endif
#endif
#if USE_WAKEUP
#include <mach/iomux.h>
#include <linux/wakelock.h>
#endif
static struct uart_driver serial_rk_reg;
@@ -214,6 +247,21 @@ struct rk_uart_dma {
};
#endif
#if USE_WAKEUP
struct uart_wake_up {
unsigned int enable;
unsigned int rx_mode;
unsigned int tx_mode;
unsigned int rx_pin;
char rx_pin_name[32];
unsigned int tx_pin;
unsigned int rx_irq;
char rx_irq_name[32];
struct wake_lock wakelock;
char wakelock_name[32];
};
#endif
struct uart_rk_port {
struct uart_port port;
struct platform_device *pdev;
@@ -237,7 +285,7 @@ struct uart_rk_port {
unsigned char msr_saved_flags;
#endif
char name[12];
char name[16];
char fifo[64];
char fifo_size;
unsigned long port_activity;
@@ -247,6 +295,9 @@ struct uart_rk_port {
#if USE_DMA
struct rk_uart_dma *dma;
#endif
#if USE_WAKEUP
struct uart_wake_up *wakeup;
#endif
};
#if USE_DMA
@@ -263,6 +314,7 @@ static int serial_rk_startup(struct uart_port *port);
static inline unsigned int serial_in(struct uart_rk_port *up, int offset)
{
offset = offset << 2;
return __raw_readb(up->port.membase + offset);
}
@@ -464,6 +516,14 @@ static void serial_rk_enable_ms(struct uart_port *port)
#endif
}
#if USE_WAKEUP
static struct uart_wake_up rk29_uart_ports_wakeup[] = {
{UART0_USE_WAKEUP, UART0_SIN, UART0_SOUT},
{UART1_USE_WAKEUP, UART1_SIN, UART1_SOUT},
{UART2_USE_WAKEUP, UART2_SIN, UART2_SOUT},
{UART3_USE_WAKEUP, UART3_SIN, UART3_SOUT},
};
#endif
#if USE_DMA
/*
@@ -1790,6 +1850,81 @@ static struct uart_driver serial_rk_reg = {
.cons = SERIAL_CONSOLE,
.nr = UART_NR,
};
#if USE_WAKEUP
static irqreturn_t serial_rk_wakeup_handler(int irq, void *dev) {
struct uart_rk_port *up = dev;
struct uart_wake_up *wakeup = up->wakeup;
if(wakeup->enable == 1) {
iomux_set(wakeup->rx_mode);
wake_lock_timeout(&wakeup->wakelock, 3 * HZ);
}
return 0;
}
static int serial_rk_setup_wakeup_irq(struct uart_rk_port *up)
{
int ret = 0;
struct uart_wake_up *wakeup = up->wakeup;
if(wakeup->enable == 1) {
memset(wakeup->wakelock_name, 0, 32);
sprintf(wakeup->wakelock_name, "serial.%d_wakelock", up->port.line);
wake_lock_init(&wakeup->wakelock, WAKE_LOCK_SUSPEND, wakeup->wakelock_name);
memset(wakeup->rx_pin_name, 0, 32);
sprintf(wakeup->rx_pin_name, "UART%d_SIN", up->port.line);
wakeup->rx_pin = iomux_mode_to_gpio(wakeup->rx_mode);
ret = gpio_request(wakeup->rx_pin, wakeup->rx_pin_name);
if (ret) {
printk("request %s fail ! \n", wakeup->rx_pin_name);
return ret;
}
gpio_direction_input(wakeup->rx_pin);
wakeup->rx_irq = gpio_to_irq(wakeup->rx_pin);
memset(wakeup->rx_irq_name, 0, 32);
sprintf(wakeup->rx_irq_name, "serial.%d_wake_up_irq", up->port.line);
ret = request_irq(wakeup->rx_irq, serial_rk_wakeup_handler, IRQF_TRIGGER_FALLING, wakeup->rx_irq_name, up);
if(ret < 0) {
printk("%s request fail\n", wakeup->rx_irq_name);
return ret;
}
disable_irq_nosync(wakeup->rx_irq);
enable_irq_wake(wakeup->rx_irq);
iomux_set(wakeup->rx_mode);
}
return ret;
}
static int serial_rk_enable_wakeup_irq(struct uart_rk_port *up) {
struct uart_wake_up *wakeup = up->wakeup;
if(wakeup->enable == 1) {
iomux_set(wakeup->rx_mode & 0xfff0);
enable_irq(wakeup->rx_irq);
}
return 0;
}
static int serial_rk_disable_wakeup_irq(struct uart_rk_port *up) {
struct uart_wake_up *wakeup = up->wakeup;
if(wakeup->enable == 1) {
disable_irq_nosync(wakeup->rx_irq);
iomux_set(wakeup->rx_mode);
}
return 0;
}
static int serial_rk_remove_wakeup_irq(struct uart_rk_port *up) {
struct uart_wake_up *wakeup = up->wakeup;
if(wakeup->enable == 1) {
//disable_irq_nosync(wakeup->rx_irq);
free_irq(wakeup->rx_irq, NULL);
gpio_free(wakeup->rx_pin);
wake_lock_destroy(&wakeup->wakelock);
}
return 0;
}
#endif
static int __devinit serial_rk_probe(struct platform_device *pdev)
{
@@ -1833,6 +1968,9 @@ static int __devinit serial_rk_probe(struct platform_device *pdev)
up->tx_loadsz = 30;
#if USE_DMA
up->dma = &rk29_uart_ports_dma[pdev->id];
#endif
#if USE_WAKEUP
up->wakeup = &rk29_uart_ports_wakeup[pdev->id];
#endif
up->port.dev = &pdev->dev;
up->port.type = PORT_RK;
@@ -1913,7 +2051,9 @@ static int __devinit serial_rk_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, up);
dev_info(&pdev->dev, "membase 0x%08x\n", (unsigned) up->port.membase);
#if USE_WAKEUP
serial_rk_setup_wakeup_irq(up);
#endif
return 0;
do_iounmap:
@@ -1946,7 +2086,9 @@ static int __devexit serial_rk_remove(struct platform_device *pdev)
kfree(up);
release_mem_region(mem->start, (mem->end - mem->start) + 1);
}
#if USE_WAKEUP
serial_rk_remove_wakeup_irq(up);
#endif
return 0;
}
@@ -1960,14 +2102,18 @@ static int serial_rk_suspend(struct platform_device *dev, pm_message_t state)
if(up->port.line == DBG_PORT && POWER_MANEGEMENT){
serial_rk_pm(&up->port, 1, 0);
}
#if USE_WAKEUP
serial_rk_enable_wakeup_irq(up);
#endif
return 0;
}
static int serial_rk_resume(struct platform_device *dev)
{
struct uart_rk_port *up = platform_get_drvdata(dev);
#if USE_WAKEUP
serial_rk_disable_wakeup_irq(up);
#endif
if (up && up->port.line != DBG_PORT && POWER_MANEGEMENT){
uart_resume_port(&serial_rk_reg, &up->port);
}