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authorMike Frysinger <vapier@gentoo.org>2010-06-02 04:34:49 -0400
committerMike Frysinger <vapier@gentoo.org>2010-07-05 05:30:07 -0400
commitc5530555f82f6fbaf51656e9ba10e295d3c5f195 (patch)
tree4ab43198bd54949c9defa91b1cf5ab2ccf02b7cf /arch/blackfin
parent4638b21f2ebc3781def51e82fb4e425a468f2e49 (diff)
downloadu-boot-linaro-stable-c5530555f82f6fbaf51656e9ba10e295d3c5f195.tar.gz
Blackfin: unify custom gpio commands
Now that we have a unified gpio layer, the misc partial gpio commands can be unified and made complete (support all possible gpios). Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/cpu/Makefile1
-rw-r--r--arch/blackfin/cpu/cmd_gpio.c120
2 files changed, 121 insertions, 0 deletions
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile
index 91797c798..b7f991dea 100644
--- a/arch/blackfin/cpu/Makefile
+++ b/arch/blackfin/cpu/Makefile
@@ -18,6 +18,7 @@ CEXTRA := initcode.o
SEXTRA := start.o
SOBJS := interrupt.o cache.o
COBJS-$(CONFIG_BOOTCOUNT_LIMIT) += bootcount.o
+COBJS-$(CONFIG_CMD_GPIO) += cmd_gpio.o
COBJS-y += cpu.o
COBJS-y += gpio.o
COBJS-y += interrupts.o
diff --git a/arch/blackfin/cpu/cmd_gpio.c b/arch/blackfin/cpu/cmd_gpio.c
new file mode 100644
index 000000000..9e505b661
--- /dev/null
+++ b/arch/blackfin/cpu/cmd_gpio.c
@@ -0,0 +1,120 @@
+/*
+ * Control GPIO pins on the fly
+ *
+ * Copyright (c) 2008-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <command.h>
+
+#include <asm/blackfin.h>
+#include <asm/gpio.h>
+
+enum {
+ GPIO_INPUT,
+ GPIO_SET,
+ GPIO_CLEAR,
+ GPIO_TOGGLE,
+};
+
+int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ if (argc == 2 && !strcmp(argv[1], "status")) {
+ bfin_gpio_labels();
+ return 0;
+ }
+
+ if (argc != 3) {
+ show_usage:
+ printf("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ /* parse the behavior */
+ ulong sub_cmd;
+ switch (argv[1][0]) {
+ case 'i': sub_cmd = GPIO_INPUT; break;
+ case 's': sub_cmd = GPIO_SET; break;
+ case 'c': sub_cmd = GPIO_CLEAR; break;
+ case 't': sub_cmd = GPIO_TOGGLE; break;
+ default: goto show_usage;
+ }
+
+ /* parse the pin with format: [p][port]<#> */
+ const char *str_pin = argv[2];
+
+ /* grab the [p]<port> portion */
+ ulong port_base;
+ if (*str_pin == 'p') ++str_pin;
+ switch (*str_pin) {
+#ifdef GPIO_PA0
+ case 'a': port_base = GPIO_PA0; break;
+#endif
+#ifdef GPIO_PB0
+ case 'b': port_base = GPIO_PB0; break;
+#endif
+#ifdef GPIO_PC0
+ case 'c': port_base = GPIO_PC0; break;
+#endif
+#ifdef GPIO_PD0
+ case 'd': port_base = GPIO_PD0; break;
+#endif
+#ifdef GPIO_PE0
+ case 'e': port_base = GPIO_PE0; break;
+#endif
+#ifdef GPIO_PF0
+ case 'f': port_base = GPIO_PF0; break;
+#endif
+#ifdef GPIO_PG0
+ case 'g': port_base = GPIO_PG0; break;
+#endif
+#ifdef GPIO_PH0
+ case 'h': port_base = GPIO_PH0; break;
+#endif
+#ifdef GPIO_PI0
+ case 'i': port_base = GPIO_PI0; break;
+#endif
+#ifdef GPIO_PJ
+ case 'j': port_base = GPIO_PJ0; break;
+#endif
+ default: goto show_usage;
+ }
+
+ /* grab the <#> portion */
+ ulong pin = simple_strtoul(str_pin + 1, NULL, 10);
+ if (pin > 15)
+ goto show_usage;
+
+ /* grab the pin before we tweak it */
+ ulong gpio = port_base + pin;
+ gpio_request(gpio, "cmd_gpio");
+
+ /* finally, let's do it: set direction and exec command */
+ if (sub_cmd == GPIO_INPUT) {
+ gpio_direction_input(gpio);
+ printf("gpio: pin %lu on port %c set to input\n", pin, *str_pin);
+ return 0;
+ }
+
+ ulong value;
+ switch (sub_cmd) {
+ case GPIO_SET: value = 1; break;
+ case GPIO_CLEAR: value = 0; break;
+ case GPIO_TOGGLE: value = !gpio_get_value(gpio); break;
+ default: goto show_usage;
+ }
+ gpio_direction_output(gpio, value);
+ printf("gpio: pin %lu on port %c (gpio %lu) value is %lu\n",
+ pin, *str_pin, gpio, value);
+
+ gpio_free(gpio);
+
+ return 0;
+}
+
+U_BOOT_CMD(gpio, 3, 0, do_gpio,
+ "set/clear/toggle gpio output pins",
+ "<set|clear|toggle> <port><pin>\n"
+ " - set/clear/toggle the specified pin (e.g. PF10)");