diff options
| -rw-r--r-- | arch/microblaze/include/asm/gpio.h | 40 | ||||
| -rw-r--r-- | board/xilinx/microblaze-generic/microblaze-generic.c | 17 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/xilinx_gpio.c | 364 | ||||
| -rw-r--r-- | include/configs/microblaze-generic.h | 3 |
5 files changed, 386 insertions, 39 deletions
diff --git a/arch/microblaze/include/asm/gpio.h b/arch/microblaze/include/asm/gpio.h index 883f4d4..f5cad56 100644 --- a/arch/microblaze/include/asm/gpio.h +++ b/arch/microblaze/include/asm/gpio.h @@ -1,41 +1,15 @@ #ifndef _ASM_MICROBLAZE_GPIO_H_ #define _ASM_MICROBLAZE_GPIO_H_ -#include <asm/io.h> +#include <asm-generic/gpio.h> -static inline int gpio_request(unsigned gpio, const char *label) -{ - return 0; -} +/* Allocation functions */ +extern int gpio_alloc_dual(u32 baseaddr, const char *name, u32 gpio_no0, + u32 gpio_no1); +extern int gpio_alloc(u32 baseaddr, const char *name, u32 gpio_no); -static inline int gpio_free(unsigned gpio) -{ - return 0; -} +#define gpio_status() gpio_info() +extern void gpio_info(void); -static inline int gpio_direction_input(unsigned gpio) -{ - return 0; -} - -static inline int gpio_direction_output(unsigned gpio, int value) -{ - return 0; -} - -static inline int gpio_get_value(unsigned gpio) -{ - return 0; -} - -static inline int gpio_set_value(unsigned gpio, int value) -{ - return 0; -} - -static inline int gpio_is_valid(int number) -{ - return 0; -} #endif diff --git a/board/xilinx/microblaze-generic/microblaze-generic.c b/board/xilinx/microblaze-generic/microblaze-generic.c index befbb3a..2f5f20e 100644 --- a/board/xilinx/microblaze-generic/microblaze-generic.c +++ b/board/xilinx/microblaze-generic/microblaze-generic.c @@ -31,12 +31,17 @@ #include <asm/processor.h> #include <asm/microblaze_intc.h> #include <asm/asm.h> +#include <asm/gpio.h> + +#ifdef CONFIG_XILINX_GPIO +static int reset_pin = -1; +#endif int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { -#ifdef CONFIG_SYS_GPIO_0 - *((unsigned long *)(CONFIG_SYS_GPIO_0_ADDR)) = - ++(*((unsigned long *)(CONFIG_SYS_GPIO_0_ADDR))); +#ifdef CONFIG_XILINX_GPIO + if (reset_pin != -1) + gpio_direction_output(reset_pin, 1); #endif #ifdef CONFIG_XILINX_TB_WATCHDOG @@ -52,8 +57,10 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) int gpio_init (void) { -#ifdef CONFIG_SYS_GPIO_0 - *((unsigned long *)(CONFIG_SYS_GPIO_0_ADDR)) = 0xFFFFFFFF; +#ifdef CONFIG_XILINX_GPIO + reset_pin = gpio_alloc(CONFIG_SYS_GPIO_0_ADDR, "reset", 1); + if (reset_pin != -1) + gpio_request(reset_pin, "reset_pin"); #endif return 0; } diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 9df1e26..830e8e6 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -47,6 +47,7 @@ COBJS-$(CONFIG_OMAP_GPIO) += omap_gpio.o COBJS-$(CONFIG_DB8500_GPIO) += db8500_gpio.o COBJS-$(CONFIG_BCM2835_GPIO) += bcm2835_gpio.o COBJS-$(CONFIG_S3C2440_GPIO) += s3c2440_gpio.o +COBJS-$(CONFIG_XILINX_GPIO) += xilinx_gpio.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/gpio/xilinx_gpio.c b/drivers/gpio/xilinx_gpio.c new file mode 100644 index 0000000..37fb0c5 --- /dev/null +++ b/drivers/gpio/xilinx_gpio.c @@ -0,0 +1,364 @@ +/* + * Copyright (c) 2013 Xilinx, Michal Simek + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <errno.h> +#include <malloc.h> +#include <linux/list.h> +#include <asm/io.h> +#include <asm/gpio.h> + +static LIST_HEAD(gpio_list); + +enum gpio_direction { + GPIO_DIRECTION_OUT = 0, + GPIO_DIRECTION_IN = 1, +}; + +/* Gpio simple map */ +struct gpio_regs { + u32 gpiodata; + u32 gpiodir; +}; + +#define GPIO_NAME_SIZE 10 + +struct gpio_names { + char name[GPIO_NAME_SIZE]; +}; + +/* Initialized, rxbd_current, rx_first_buf must be 0 after init */ +struct xilinx_gpio_priv { + struct gpio_regs *regs; + u32 gpio_min; + u32 gpio_max; + u32 gpiodata_store; + char name[GPIO_NAME_SIZE]; + struct list_head list; + struct gpio_names *gpio_name; +}; + +/* Store number of allocated gpio pins */ +static u32 xilinx_gpio_max; + +/* Get associated gpio controller */ +static struct xilinx_gpio_priv *gpio_get_controller(unsigned gpio) +{ + struct list_head *entry; + struct xilinx_gpio_priv *priv = NULL; + + list_for_each(entry, &gpio_list) { + priv = list_entry(entry, struct xilinx_gpio_priv, list); + if (gpio >= priv->gpio_min && gpio <= priv->gpio_max) { + debug("%s: reg: %x, min-max: %d-%d\n", __func__, + (u32)priv->regs, priv->gpio_min, priv->gpio_max); + return priv; + } + } + puts("!!!Can't get gpio controller!!!\n"); + return NULL; +} + +/* Get gpio pin name if used/setup */ +static char *get_name(unsigned gpio) +{ + u32 gpio_priv; + struct xilinx_gpio_priv *priv; + + debug("%s\n", __func__); + + priv = gpio_get_controller(gpio); + if (priv) { + gpio_priv = gpio - priv->gpio_min; + + return *priv->gpio_name[gpio_priv].name ? + priv->gpio_name[gpio_priv].name : "UNKNOWN"; + } + return "UNKNOWN"; +} + +/* Get output value */ +static int gpio_get_output_value(unsigned gpio) +{ + u32 val, gpio_priv; + struct xilinx_gpio_priv *priv = gpio_get_controller(gpio); + + if (priv) { + gpio_priv = gpio - priv->gpio_min; + val = !!(priv->gpiodata_store & (1 << gpio_priv)); + debug("%s: reg: %x, gpio_no: %d, dir: %d\n", __func__, + (u32)priv->regs, gpio_priv, val); + + return val; + } + return -1; +} + +/* Get input value */ +static int gpio_get_input_value(unsigned gpio) +{ + u32 val, gpio_priv; + struct gpio_regs *regs; + struct xilinx_gpio_priv *priv = gpio_get_controller(gpio); + + if (priv) { + regs = priv->regs; + gpio_priv = gpio - priv->gpio_min; + val = readl(®s->gpiodata); + val = !!(val & (1 << gpio_priv)); + debug("%s: reg: %x, gpio_no: %d, dir: %d\n", __func__, + (u32)priv->regs, gpio_priv, val); + + return val; + } + return -1; +} + +/* Set gpio direction */ +static int gpio_set_direction(unsigned gpio, enum gpio_direction direction) +{ + u32 val, gpio_priv; + struct gpio_regs *regs; + struct xilinx_gpio_priv *priv = gpio_get_controller(gpio); + + if (priv) { + regs = priv->regs; + val = readl(®s->gpiodir); + + gpio_priv = gpio - priv->gpio_min; + if (direction == GPIO_DIRECTION_OUT) + val &= ~(1 << gpio_priv); + else + val |= 1 << gpio_priv; + + writel(val, ®s->gpiodir); + debug("%s: reg: %x, gpio_no: %d, dir: %d\n", __func__, + (u32)priv->regs, gpio_priv, val); + + return 0; + } + + return -1; +} + +/* Get gpio direction */ +static int gpio_get_direction(unsigned gpio) +{ + u32 val, gpio_priv; + struct gpio_regs *regs; + struct xilinx_gpio_priv *priv = gpio_get_controller(gpio); + + if (priv) { + regs = priv->regs; + gpio_priv = gpio - priv->gpio_min; + val = readl(®s->gpiodir); + val = !!(val & (1 << gpio_priv)); + debug("%s: reg: %x, gpio_no: %d, dir: %d\n", __func__, + (u32)priv->regs, gpio_priv, val); + + return val; + } + + return -1; +} + +/* + * Get input value + * for example gpio setup to output only can't get input value + * which is breaking gpio toggle command + */ +int gpio_get_value(unsigned gpio) +{ + u32 val; + + if (gpio_get_direction(gpio) == GPIO_DIRECTION_OUT) + val = gpio_get_output_value(gpio); + else + val = gpio_get_input_value(gpio); + + return val; +} + +/* Set output value */ +static int gpio_set_output_value(unsigned gpio, int value) +{ + u32 val, gpio_priv; + struct gpio_regs *regs; + struct xilinx_gpio_priv *priv = gpio_get_controller(gpio); + + if (priv) { + regs = priv->regs; + gpio_priv = gpio - priv->gpio_min; + val = priv->gpiodata_store; + if (value) + val |= 1 << gpio_priv; + else + val &= ~(1 << gpio_priv); + + writel(val, ®s->gpiodata); + debug("%s: reg: %x, gpio_no: %d, output_val: %d\n", __func__, + (u32)priv->regs, gpio_priv, val); + priv->gpiodata_store = val; + + return 0; + } + + return -1; +} + +int gpio_set_value(unsigned gpio, int value) +{ + if (gpio_get_direction(gpio) == GPIO_DIRECTION_OUT) + return gpio_set_output_value(gpio, value); + + return -1; +} + +/* Set GPIO as input */ +int gpio_direction_input(unsigned gpio) +{ + debug("%s\n", __func__); + return gpio_set_direction(gpio, GPIO_DIRECTION_IN); +} + +/* Setup GPIO as output and set output value */ +int gpio_direction_output(unsigned gpio, int value) +{ + int ret = gpio_set_direction(gpio, GPIO_DIRECTION_OUT); + + debug("%s\n", __func__); + + if (ret < 0) + return ret; + + return gpio_set_output_value(gpio, value); +} + +/* Show gpio status */ +void gpio_info(void) +{ + unsigned gpio; + + struct list_head *entry; + struct xilinx_gpio_priv *priv = NULL; + + list_for_each(entry, &gpio_list) { + priv = list_entry(entry, struct xilinx_gpio_priv, list); + printf("\n%s: %s/%x (%d-%d)\n", __func__, priv->name, + (u32)priv->regs, priv->gpio_min, priv->gpio_max); + + for (gpio = priv->gpio_min; gpio <= priv->gpio_max; gpio++) { + printf("GPIO_%d:\t%s is an ", gpio, get_name(gpio)); + if (gpio_get_direction(gpio) == GPIO_DIRECTION_OUT) + printf("OUTPUT value = %d\n", + gpio_get_output_value(gpio)); + else + printf("INPUT value = %d\n", + gpio_get_input_value(gpio)); + } + } +} + +int gpio_request(unsigned gpio, const char *label) +{ + u32 gpio_priv; + struct xilinx_gpio_priv *priv; + + if (gpio >= xilinx_gpio_max) + return -EINVAL; + + priv = gpio_get_controller(gpio); + if (priv) { + gpio_priv = gpio - priv->gpio_min; + + if (label != NULL) { + strncpy(priv->gpio_name[gpio_priv].name, label, + GPIO_NAME_SIZE); + priv->gpio_name[gpio_priv].name[GPIO_NAME_SIZE - 1] = + '\0'; + } + return 0; + } + + return -1; +} + +int gpio_free(unsigned gpio) +{ + u32 gpio_priv; + struct xilinx_gpio_priv *priv; + + if (gpio >= xilinx_gpio_max) + return -EINVAL; + + priv = gpio_get_controller(gpio); + if (priv) { + gpio_priv = gpio - priv->gpio_min; + priv->gpio_name[gpio_priv].name[0] = '\0'; + + /* Do nothing here */ + return 0; + } + + return -1; +} + +int gpio_alloc(u32 baseaddr, const char *name, u32 gpio_no) +{ + struct xilinx_gpio_priv *priv; + + priv = calloc(1, sizeof(struct xilinx_gpio_priv)); + + /* Setup gpio name */ + if (name != NULL) { + strncpy(priv->name, name, GPIO_NAME_SIZE); + priv->name[GPIO_NAME_SIZE - 1] = '\0'; + } + priv->regs = (struct gpio_regs *)baseaddr; + + priv->gpio_min = xilinx_gpio_max; + xilinx_gpio_max = priv->gpio_min + gpio_no; + priv->gpio_max = xilinx_gpio_max - 1; + + priv->gpio_name = calloc(gpio_no, sizeof(struct gpio_names)); + + INIT_LIST_HEAD(&priv->list); + list_add_tail(&priv->list, &gpio_list); + + printf("%s: Add %s (%d-%d)\n", __func__, name, + priv->gpio_min, priv->gpio_max); + + /* Return the first gpio allocated for this device */ + return priv->gpio_min; +} + +/* Dual channel gpio is one IP with two independent channels */ +int gpio_alloc_dual(u32 baseaddr, const char *name, u32 gpio_no0, u32 gpio_no1) +{ + int ret; + + ret = gpio_alloc(baseaddr, name, gpio_no0); + gpio_alloc(baseaddr + 8, strcat((char *)name, "_1"), gpio_no1); + + /* Return the first gpio allocated for this device */ + return ret; +} diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h index 0c4e719..17f53ba 100644 --- a/include/configs/microblaze-generic.h +++ b/include/configs/microblaze-generic.h @@ -104,7 +104,7 @@ /* gpio */ #ifdef XILINX_GPIO_BASEADDR -# define CONFIG_SYS_GPIO_0 1 +# define CONFIG_XILINX_GPIO # define CONFIG_SYS_GPIO_0_ADDR XILINX_GPIO_BASEADDR #endif @@ -312,6 +312,7 @@ #define CONFIG_CMD_IRQ #define CONFIG_CMD_MFSL #define CONFIG_CMD_ECHO +#define CONFIG_CMD_GPIO #if defined(CONFIG_DCACHE) || defined(CONFIG_ICACHE) # define CONFIG_CMD_CACHE |