diff options
Diffstat (limited to 'package/gpio_rtl8196c/src/gpio_rtl8196c.c')
| -rw-r--r-- | package/gpio_rtl8196c/src/gpio_rtl8196c.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/package/gpio_rtl8196c/src/gpio_rtl8196c.c b/package/gpio_rtl8196c/src/gpio_rtl8196c.c new file mode 100644 index 000000000..5b875be12 --- /dev/null +++ b/package/gpio_rtl8196c/src/gpio_rtl8196c.c @@ -0,0 +1,227 @@ +/* + * + * + * Copyright (C)2006-2008 by + * All rights reserved. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/stat.h> +#include <linux/moduleparam.h> + +//////////////////////////////////////////////////////////////////////// +//DEBUG macroses +#define MOD_NAME "gpio_rtl8196c" + +#define PRINT( format, args ...) printk( "%15s:%3d = " format, MOD_NAME,__LINE__, ##args) + +//////////////////////////////////////////////////////////////////////// +#define RTL8196C_BASE_ADDR 0xb8000000 +#define RTL8196C_GPIO_ADDR (RTL8196C_BASE_ADDR + 0x3500) +#define RTL8196C_GPIO_PABCD_CNT_ADDR (RTL8196C_GPIO_ADDR + 0x00) +#define RTL8196C_GPIO_PABCD_TYPE_ADDR (RTL8196C_GPIO_ADDR + 0x00) +#define RTL8196C_GPIO_PABCD_DIR_ADDR (RTL8196C_GPIO_ADDR + 0x08) +#define RTL8196C_GPIO_PABCD_DAT_ADDR (RTL8196C_GPIO_ADDR + 0x0c) +#define RTL8196C_GPIO_PABCD_ISR_ADDR (RTL8196C_GPIO_ADDR + 0x10) +#define RTL8196C_GPIO_PAB_IMR_ADDR (RTL8196C_GPIO_ADDR + 0x14) +#define RTL8196C_GPIO_PCD_IMR_ADDR (RTL8196C_GPIO_ADDR + 0x18) + +#define RTL8196C_MUX_ADDR (RTL8196C_BASE_ADDR + 0x40) + +static int g_muxdummy; + +//gpio shared pin mapping list +#define RTL8196C_GPIO_SPML_LED_S0 //LED_PORT0,GPIOB2 +#define RTL8196C_GPIO_SPML_LED_S1 //LED_PORT1,GPIOB3 +#define RTL8196C_GPIO_SPML_LED_S2 //LED_PORT2,GPIOB4 +#define RTL8196C_GPIO_SPML_LED_S3 //LED_PORT3,GPIOB5 +#define RTL8196C_GPIO_SPML_LED_P0 //LED_PORT4,GPIOB6 +#define RTL8196C_GPIO_SPML_LED_P1 //GPIOB7 +#define RTL8196C_GPIO_SPML_LED_P2 //GPIOC0 +#define RTL8196C_GPIO_SPML_MEM //NF_CS1#MCS1, DRAM_CKE, GPIOA[1:0] +#define RTL8196C_GPIO_SPML_JTAG //JTAG, GPIOA[6:2] +#define RTL8196C_GPIO_SPML_UART +#define RTL8196C_GPIO_SPML_PCIE + +static uint32_t rtl8196c_mux_value = 0x340FFF; + +struct rtl_gpio_chip +{ + struct gpio_chip chip; + uint32_t gpio_cnt; + uint32_t gpio_data; + uint32_t gpio_dir; + volatile uint8_t* regs; + spinlock_t lock;/* Lock used for synchronization */ +}; + +extern struct rtl_gpio_chip gpio_rtl8196c; + +static inline struct rtl_gpio_chip *to_rtl_gpio_chip(struct gpio_chip *gc) +{ + return container_of(gc, struct rtl_gpio_chip, chip); +} + +//////////////////////////////////////////////////////////////////////// +//configure ports as GPIO +static int param_set_rtl8196c_mux( const char *val, struct kernel_param *kp ) +{ + volatile uint32_t *mux = (uint32_t *)RTL8196C_MUX_ADDR; + unsigned long flags; + + PRINT("param_set_rtl8196c_mux\n"); + if ( !val ) + { + return -EINVAL; + } + if ( sscanf( val, "0x%x", &rtl8196c_mux_value ) < 0 ) + { + PRINT("err val\n"); + return -EINVAL; + } + spin_lock_irqsave(&gpio_rtl8196c.lock, flags); + PRINT("mux set 0x%08x\n",rtl8196c_mux_value); + *mux = rtl8196c_mux_value; + spin_unlock_irqrestore(&gpio_rtl8196c.lock, flags); + return 0; +} + +#define param_check_rtl8196c_mux(a,b) ;; + +//////////////////////////////////////////////////////////////////////// +//get current configured port value +static int param_get_rtl8196c_mux( char *buf, struct kernel_param *kp ) +{ + volatile uint32_t *mux = (uint32_t*)RTL8196C_MUX_ADDR; + unsigned long flags; + + PRINT("param_get_rtl8196c_mux\n"); + spin_lock_irqsave(&gpio_rtl8196c.lock, flags); + sprintf( buf, "0x%x", *mux ); + spin_unlock_irqrestore(&gpio_rtl8196c.lock, flags); + return strlen( buf ); +} + +module_param_named(rtl8196c_mux, g_muxdummy, rtl8196c_mux, S_IRUGO | S_IWUSR); + +//////////////////////////////////////////////////////////////////////// +static int gpio_rtl8196c_dir_in( struct gpio_chip *chip, unsigned int gpio ) +{ + volatile uint32_t *dir = (uint32_t*)RTL8196C_GPIO_PABCD_DIR_ADDR; + unsigned long flags; + struct rtl_gpio_chip *rgc = to_rtl_gpio_chip( chip ); + + PRINT("gpio_rtl8196c_dir_in\n"); + PRINT("offset = %d\n", gpio); + + spin_lock_irqsave(rgc->lock, flags); + rgc->gpio_dir &= ~(1 << gpio); + *dir = rgc->gpio_dir; + spin_unlock_irqrestore(rgc->lock, flags); + + return 0; +} + + +//////////////////////////////////////////////////////////////////////// +static int gpio_rtl8196c_dir_out( struct gpio_chip *chip, unsigned int gpio ) +{ + volatile uint32_t *dir = (uint32_t*)RTL8196C_GPIO_PABCD_DIR_ADDR; + unsigned long flags; + struct rtl_gpio_chip *rgc = to_rtl_gpio_chip( chip ); + + PRINT("gpio_rtl8196c_dir_out\n"); + PRINT("offset = %d\n", gpio); + + spin_lock_irqsave(rgc->lock, flags); + rgc->gpio_dir |= (1 << gpio); + *dir = rgc->gpio_dir; + spin_unlock_irqrestore(rgc->lock, flags); + + return 0; +} + + +//////////////////////////////////////////////////////////////////////// +static int gpio_rtl8196c_get( struct gpio_chip *chip, unsigned int gpio ) +{ + volatile uint32_t *dat = (uint32_t*)RTL8196C_GPIO_PABCD_DAT_ADDR; + int res=0; + unsigned long flags; + struct rtl_gpio_chip *rgc = to_rtl_gpio_chip( chip ); + + PRINT("gpio_rtl8196c_get\n"); + PRINT("offset = %d\n", gpio); + + spin_lock_irqsave(rgc->lock, flags); + //or get it from data register? + res = ((*dat)>>gpio)&0x1; + spin_unlock_irqrestore(rgc->lock, flags); + return res; +} + + +//////////////////////////////////////////////////////////////////////// +static void gpio_rtl8196c_set( struct gpio_chip *chip, unsigned int gpio, int value ) +{ + volatile uint32_t *dat = (uint32_t*)RTL8196C_GPIO_PABCD_DAT_ADDR; + int res=0; + unsigned long flags; + struct rtl_gpio_chip *rgc = to_rtl_gpio_chip( chip ); + + PRINT("gpio_rtl8196c_set\n"); + PRINT("offset = %d = %d\n", gpio, value); + + spin_lock_irqsave(rgc->lock, flags); + if ( value ) + rgc->gpio_data |= (1 << gpio); + else + rgc->gpio_data &= ~(1 << gpio); + *dat = rgc->gpio_data; + spin_unlock_irqrestore(rgc->lock, flags); + +} + +//////////////////////////////////////////////////////////////////////// +//init module +struct rtl_gpio_chip gpio_rtl8196c = +{ + .chip = { + .label = "gpio_rtl8196c", + .direction_input = gpio_rtl8196c_dir_in, + .get = gpio_rtl8196c_get, + .direction_output = gpio_rtl8196c_dir_out, + .set = gpio_rtl8196c_set, + .base = 0, + .ngpio = 32, + }, + .gpio_dir = 0x0, +}; + +static int __init gpio_rtl8196c_init( void ) +{ + PRINT("Start\n"); + gpiochip_add( &gpio_rtl8196c.chip ); + return 0; +} + +//////////////////////////////////////////////////////////////////////// +//exit from module +static int gpio_rtl8196c_exit( void ) +{ + PRINT("End\n"); + gpiochip_remove( &gpio_rtl8196c.chip ); + return 0; +} + + + +MODULE_AUTHOR("Artur Artamonov"); +MODULE_DESCRIPTION("gpio_rtl8196c"); +MODULE_LICENSE("GPL"); + +module_init( gpio_rtl8196c_init ); +module_exit( gpio_rtl8196c_exit ); |