diff options
| -rw-r--r-- | arch/sandbox/config.mk | 2 | ||||
| -rw-r--r-- | arch/sandbox/cpu/Makefile | 2 | ||||
| -rw-r--r-- | arch/sandbox/cpu/os.c | 144 | ||||
| -rw-r--r-- | arch/sandbox/cpu/start.c | 102 | ||||
| -rw-r--r-- | arch/sandbox/cpu/state.c | 51 | ||||
| -rw-r--r-- | arch/sandbox/cpu/u-boot.lds | 14 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/getopt.h | 71 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/global_data.h | 1 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/gpio.h | 81 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/sections.h | 22 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/state.h | 62 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/u-boot-sandbox.h | 4 | ||||
| -rw-r--r-- | arch/sandbox/lib/board.c | 11 | ||||
| -rw-r--r-- | board/sandbox/sandbox/sandbox.c | 10 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/sandbox.c | 209 | ||||
| -rw-r--r-- | include/configs/sandbox.h | 10 | ||||
| -rw-r--r-- | include/os.h | 51 |
18 files changed, 828 insertions, 20 deletions
diff --git a/arch/sandbox/config.mk b/arch/sandbox/config.mk index 2ec1bb772b..02ce4a4410 100644 --- a/arch/sandbox/config.mk +++ b/arch/sandbox/config.mk @@ -17,5 +17,5 @@ # Foundation, Inc., 59 Temple Place, Suite 330, Boston, # MA 02111-1307 USA -PLATFORM_CPPFLAGS += -DCONFIG_SANDBOX -D__SANDBOX__ +PLATFORM_CPPFLAGS += -DCONFIG_SANDBOX -D__SANDBOX__ -U_FORTIFY_SOURCE PLATFORM_LIBS += -lrt diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile index 2ae0f7155c..6fd09ff65b 100644 --- a/arch/sandbox/cpu/Makefile +++ b/arch/sandbox/cpu/Makefile @@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(CPU).o -COBJS := cpu.o start.o os.o +COBJS := cpu.o os.o start.o state.o SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 6d55b5cbce..36637af6ce 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -19,17 +19,22 @@ * MA 02111-1307 USA */ +#include <errno.h> #include <fcntl.h> +#include <getopt.h> #include <stdlib.h> #include <termios.h> -#include <unistd.h> #include <time.h> -#include <errno.h> -#include <sys/types.h> -#include <sys/stat.h> +#include <unistd.h> #include <sys/mman.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/types.h> #include <linux/types.h> +#include <asm/getopt.h> +#include <asm/sections.h> +#include <asm/state.h> #include <os.h> /* Operating System Interface */ @@ -44,9 +49,42 @@ ssize_t os_write(int fd, const void *buf, size_t count) return write(fd, buf, count); } -int os_open(const char *pathname, int flags) +off_t os_lseek(int fd, off_t offset, int whence) +{ + if (whence == OS_SEEK_SET) + whence = SEEK_SET; + else if (whence == OS_SEEK_CUR) + whence = SEEK_CUR; + else if (whence == OS_SEEK_END) + whence = SEEK_END; + else + os_exit(1); + return lseek(fd, offset, whence); +} + +int os_open(const char *pathname, int os_flags) { - return open(pathname, flags); + int flags; + + switch (os_flags & OS_O_MASK) { + case OS_O_RDONLY: + default: + flags = O_RDONLY; + break; + + case OS_O_WRONLY: + flags = O_WRONLY; + break; + + case OS_O_RDWR: + flags = O_RDWR; + break; + } + + if (os_flags & OS_O_CREAT) + flags |= O_CREAT; + + return open(pathname, flags, 0777); } int os_close(int fd) @@ -121,3 +159,97 @@ u64 os_get_nsec(void) return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000; #endif } + +static char *short_opts; +static struct option *long_opts; + +int os_parse_args(struct sandbox_state *state, int argc, char *argv[]) +{ + struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start; + size_t num_options = __u_boot_sandbox_option_count(); + size_t i; + + int hidden_short_opt; + size_t si; + + int c; + + if (short_opts || long_opts) + return 1; + + state->argc = argc; + state->argv = argv; + + /* dynamically construct the arguments to the system getopt_long */ + short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1); + long_opts = os_malloc(sizeof(*long_opts) * num_options); + if (!short_opts || !long_opts) + return 1; + + /* + * getopt_long requires "val" to be unique (since that is what the + * func returns), so generate unique values automatically for flags + * that don't have a short option. pick 0x100 as that is above the + * single byte range (where ASCII/ISO-XXXX-X charsets live). + */ + hidden_short_opt = 0x100; + si = 0; + for (i = 0; i < num_options; ++i) { + long_opts[i].name = sb_opt[i]->flag; + long_opts[i].has_arg = sb_opt[i]->has_arg ? + required_argument : no_argument; + long_opts[i].flag = NULL; + + if (sb_opt[i]->flag_short) { + short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short; + if (long_opts[i].has_arg == required_argument) + short_opts[si++] = ':'; + } else + long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++; + } + short_opts[si] = '\0'; + + /* we need to handle output ourselves since u-boot provides printf */ + opterr = 0; + + /* + * walk all of the options the user gave us on the command line, + * figure out what u-boot option structure they belong to (via + * the unique short val key), and call the appropriate callback. + */ + while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) { + for (i = 0; i < num_options; ++i) { + if (sb_opt[i]->flag_short == c) { + if (sb_opt[i]->callback(state, optarg)) { + state->parse_err = sb_opt[i]->flag; + return 0; + } + break; + } + } + if (i == num_options) { + /* + * store the faulting flag for later display. we have to + * store the flag itself as the getopt parsing itself is + * tricky: need to handle the following flags (assume all + * of the below are unknown): + * -a optopt='a' optind=<next> + * -abbbb optopt='a' optind=<this> + * -aaaaa optopt='a' optind=<this> + * --a optopt=0 optind=<this> + * as you can see, it is impossible to determine the exact + * faulting flag without doing the parsing ourselves, so + * we just report the specific flag that failed. + */ + if (optopt) { + static char parse_err[3] = { '-', 0, '\0', }; + parse_err[1] = optopt; + state->parse_err = parse_err; + } else + state->parse_err = argv[optind - 1]; + break; + } + } + + return 0; +} diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c index a429e296ec..6c3e8eb379 100644 --- a/arch/sandbox/cpu/start.c +++ b/arch/sandbox/cpu/start.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011 The Chromium OS Authors. + * Copyright (c) 2011-2012 The Chromium OS Authors. * See file CREDITS for list of people who contributed to this * project. * @@ -20,9 +20,109 @@ */ #include <common.h> +#include <asm/getopt.h> +#include <asm/sections.h> +#include <asm/state.h> + +#include <os.h> + +int sandbox_early_getopt_check(void) +{ + struct sandbox_state *state = state_get_current(); + struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start; + size_t num_options = __u_boot_sandbox_option_count(); + size_t i; + int max_arg_len, max_noarg_len; + + /* parse_err will be a string of the faulting option */ + if (!state->parse_err) + return 0; + + if (strcmp(state->parse_err, "help")) { + printf("u-boot: error: failed while parsing option: %s\n" + "\ttry running with --help for more information.\n", + state->parse_err); + os_exit(1); + } + + printf( + "u-boot, a command line test interface to U-Boot\n\n" + "Usage: u-boot [options]\n" + "Options:\n"); + + max_arg_len = 0; + for (i = 0; i < num_options; ++i) + max_arg_len = max(strlen(sb_opt[i]->flag), max_arg_len); + max_noarg_len = max_arg_len + 7; + + for (i = 0; i < num_options; ++i) { + struct sb_cmdline_option *opt = sb_opt[i]; + + /* first output the short flag if it has one */ + if (opt->flag_short >= 0x100) + printf(" "); + else + printf(" -%c, ", opt->flag_short); + + /* then the long flag */ + if (opt->has_arg) + printf("--%-*s", max_noarg_len, opt->flag); + else + printf("--%-*s <arg> ", max_arg_len, opt->flag); + + /* finally the help text */ + printf(" %s\n", opt->help); + } + + os_exit(0); +} + +static int sb_cmdline_cb_help(struct sandbox_state *state, const char *arg) +{ + /* just flag to sandbox_early_getopt_check to show usage */ + return 1; +} +SB_CMDLINE_OPT_SHORT(help, 'h', 0, "Display help"); + +int sandbox_main_loop_init(void) +{ + struct sandbox_state *state = state_get_current(); + + /* Execute command if required */ + if (state->cmd) { + /* TODO: redo this when cmd tidy-up series lands */ +#ifdef CONFIG_SYS_HUSH_PARSER + run_command(state->cmd, 0); +#else + parse_string_outer(state->cmd, FLAG_PARSE_SEMICOLON | + FLAG_EXIT_FROM_LOOP); +#endif + os_exit(state->exit_type); + } + + return 0; +} + +static int sb_cmdline_cb_command(struct sandbox_state *state, const char *arg) +{ + state->cmd = arg; + return 0; +} +SB_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command"); int main(int argc, char *argv[]) { + struct sandbox_state *state; + int err; + + err = state_init(); + if (err) + return err; + + state = state_get_current(); + if (os_parse_args(state, argc, argv)) + return 1; + /* * Do pre- and post-relocation init, then start up U-Boot. This will * never return. diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c new file mode 100644 index 0000000000..88ae2b0820 --- /dev/null +++ b/arch/sandbox/cpu/state.c @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2011-2012 The Chromium OS Authors. + * 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 <asm/state.h> + +/* Main state record for the sandbox */ +static struct sandbox_state main_state; +static struct sandbox_state *state; /* Pointer to current state record */ + +void state_record_exit(enum exit_type_id exit_type) +{ + state->exit_type = exit_type; +} + +struct sandbox_state *state_get_current(void) +{ + assert(state); + return state; +} + +int state_init(void) +{ + state = &main_state; + + /* + * Example of how to use GPIOs: + * + * sandbox_gpio_set_direction(170, 0); + * sandbox_gpio_set_value(170, 0); + */ + return 0; +} diff --git a/arch/sandbox/cpu/u-boot.lds b/arch/sandbox/cpu/u-boot.lds index 2d2e50fdbf..99601387cb 100644 --- a/arch/sandbox/cpu/u-boot.lds +++ b/arch/sandbox/cpu/u-boot.lds @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011 The Chromium OS Authors. + * Copyright (c) 2011-2012 The Chromium OS Authors. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. * @@ -24,11 +24,15 @@ SECTIONS { - __u_boot_cmd_start = .; - .u_boot_cmd : { *(.u_boot_cmd) } - __u_boot_cmd_end = .; - __bss_start = .; + __u_boot_cmd_start = .; + _u_boot_cmd : { *(.u_boot_cmd) } + __u_boot_cmd_end = .; + __u_boot_sandbox_option_start = .; + _u_boot_sandbox_getopt : { *(.u_boot_sandbox_getopt) } + __u_boot_sandbox_option_end = .; + + __bss_start = .; } INSERT BEFORE .data; diff --git a/arch/sandbox/include/asm/getopt.h b/arch/sandbox/include/asm/getopt.h new file mode 100644 index 0000000000..685883cd3f --- /dev/null +++ b/arch/sandbox/include/asm/getopt.h @@ -0,0 +1,71 @@ +/* + * Code for setting up command line flags like `./u-boot --help` + * + * Copyright (c) 2011 The Chromium OS Authors. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __SANDBOX_GETOPT_H +#define __SANDBOX_GETOPT_H + +struct sandbox_state; + +/* + * Internal structure for storing details about the flag. + * Most people should not have to dig around in this as + * it only gets parsed by the core sandbox code. End + * consumer code should focus on the macros below and + * the callback function. + */ +struct sb_cmdline_option { + /* The long flag name: "help" for "--help" */ + const char *flag; + /* The (optional) short flag name: "h" for "-h" */ + int flag_short; + /* The help string shown to the user when processing --help */ + const char *help; + /* Whether this flag takes an argument */ + int has_arg; + /* Callback into the end consumer code with the option */ + int (*callback)(struct sandbox_state *state, const char *opt); +}; + +/* + * Internal macro to expand the lower macros into the necessary + * magic junk that makes this all work. + */ +#define _SB_CMDLINE_OPT(f, s, ha, h) \ + static struct sb_cmdline_option sb_cmdline_option_##f = { \ + .flag = #f, \ + .flag_short = s, \ + .help = h, \ + .has_arg = ha, \ + .callback = sb_cmdline_cb_##f, \ + }; \ + /* Ppointer to the struct in a special section for the linker script */ \ + static __attribute__((section(".u_boot_sandbox_getopt"), used)) \ + struct sb_cmdline_option *sb_cmdline_option_##f##_ptr = \ + &sb_cmdline_option_##f + +/** + * Macros for end code to declare new command line flags. + * + * @param f The long flag name e.g. help + * @param ha Does the flag have an argument e.g. 0/1 + * @param h The help string displayed when showing --help + * + * This invocation: + * SB_CMDLINE_OPT(foo, 0, "The foo arg"); + * Will create a new flag named "--foo" (no short option) that takes + * no argument. If the user specifies "--foo", then the callback func + * sb_cmdline_cb_foo() will automatically be called. + */ +#define SB_CMDLINE_OPT(f, ha, h) _SB_CMDLINE_OPT(f, 0, ha, h) +/* + * Same as above, but @s is used to specify a short flag e.g. + * SB_CMDLINE_OPT(foo, 'f', 0, "The foo arg"); + */ +#define SB_CMDLINE_OPT_SHORT(f, s, ha, h) _SB_CMDLINE_OPT(f, s, ha, h) + +#endif diff --git a/arch/sandbox/include/asm/global_data.h b/arch/sandbox/include/asm/global_data.h index 8d47191f92..01a706362e 100644 --- a/arch/sandbox/include/asm/global_data.h +++ b/arch/sandbox/include/asm/global_data.h @@ -45,6 +45,7 @@ typedef struct global_data { unsigned long fb_base; /* base address of frame buffer */ u8 *ram_buf; /* emulated RAM buffer */ phys_size_t ram_size; /* RAM size */ + const void *fdt_blob; /* Our device tree, NULL if none */ void **jt; /* jump table */ char env_buf[32]; /* buffer for getenv() before reloc. */ } gd_t; diff --git a/arch/sandbox/include/asm/gpio.h b/arch/sandbox/include/asm/gpio.h new file mode 100644 index 0000000000..0500c539b3 --- /dev/null +++ b/arch/sandbox/include/asm/gpio.h @@ -0,0 +1,81 @@ +/* + * This is the interface to the sandbox GPIO driver for test code which + * wants to change the GPIO values reported to U-Boot. + * + * Copyright (c) 2011 The Chromium OS Authors. + * 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 + */ + +#ifndef __ASM_SANDBOX_GPIO_H +#define __ASM_SANDBOX_GPIO_H + +/* + * We use the generic interface, and add a back-channel. + * + * The back-channel functions are declared in this file. They should not be used + * except in test code. + * + * Test code can, for example, call sandbox_gpio_set_value() to set the value of + * a simulated GPIO. From then on, normal code in U-Boot will see this new + * value when it calls gpio_get_value(). + * + * NOTE: DO NOT use the functions in this file except in test code! + */ +#include <asm-generic/gpio.h> + +/** + * Return the simulated value of a GPIO (used only in sandbox test code) + * + * @param gp GPIO number + * @return -1 on error, 0 if GPIO is low, >0 if high + */ +int sandbox_gpio_get_value(unsigned gp); + +/** + * Set the simulated value of a GPIO (used only in sandbox test code) + * + * @param gp GPIO number + * @param value value to set (0 for low, non-zero for high) + * @return -1 on error, 0 if ok + */ +int sandbox_gpio_set_value(unsigned gp, int value); + +/** + * Return the simulated direction of a GPIO (used only in sandbox test code) + * + * @param gp GPIO number + * @return -1 on error, 0 if GPIO is input, >0 if output + */ +int sandbox_gpio_get_direction(unsigned gp); + +/** + * Set the simulated direction of a GPIO (used only in sandbox test code) + * + * @param gp GPIO number + * @param output 0 to set as input, 1 to set as output + * @return -1 on error, 0 if ok + */ +int sandbox_gpio_set_direction(unsigned gp, int output); + +/* Display information about each GPIO */ +void gpio_info(void); + +#define gpio_status() gpio_info() + +#endif diff --git a/arch/sandbox/include/asm/sections.h b/arch/sandbox/include/asm/sections.h new file mode 100644 index 0000000000..eafce7d8ab --- /dev/null +++ b/arch/sandbox/include/asm/sections.h @@ -0,0 +1,22 @@ +/* + * decls for symbols defined in the linker script + * + * Copyright (c) 2012 The Chromium OS Authors. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __SANDBOX_SECTIONS_H +#define __SANDBOX_SECTIONS_H + +struct sb_cmdline_option; + +extern struct sb_cmdline_option *__u_boot_sandbox_option_start[], + *__u_boot_sandbox_option_end[]; + +static inline size_t __u_boot_sandbox_option_count(void) +{ + return __u_boot_sandbox_option_end - __u_boot_sandbox_option_start; +} + +#endif diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h new file mode 100644 index 0000000000..2b62b46ea2 --- /dev/null +++ b/arch/sandbox/include/asm/state.h @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2011-2012 The Chromium OS Authors. + * 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 + */ + +#ifndef __SANDBOX_STATE_H +#define __SANDBOX_STATE_H + +#include <config.h> + +/* How we exited U-Boot */ +enum exit_type_id { + STATE_EXIT_NORMAL, + STATE_EXIT_COLD_REBOOT, + STATE_EXIT_POWER_OFF, +}; + +/* The complete state of the test system */ +struct sandbox_state { + const char *cmd; /* Command to execute */ + enum exit_type_id exit_type; /* How we exited U-Boot */ + const char *parse_err; /* Error to report from parsing */ + int argc; /* Program arguments */ + char **argv; +}; + +/** + * Record the exit type to be reported by the test program. + * + * @param exit_type Exit type to record + */ +void state_record_exit(enum exit_type_id exit_type); + +/** + * Gets a pointer to the current state. + * + * @return pointer to state + */ +struct sandbox_state *state_get_current(void); + +/** + * Initialize the test system state + */ +int state_init(void); + +#endif diff --git a/arch/sandbox/include/asm/u-boot-sandbox.h b/arch/sandbox/include/asm/u-boot-sandbox.h index 236b4ee287..50bf8c605d 100644 --- a/arch/sandbox/include/asm/u-boot-sandbox.h +++ b/arch/sandbox/include/asm/u-boot-sandbox.h @@ -35,4 +35,8 @@ int board_init(void); int dram_init(void); +/* start.c */ +int sandbox_early_getopt_check(void); +int sandbox_main_loop_init(void); + #endif /* _U_BOOT_SANDBOX_H_ */ diff --git a/arch/sandbox/lib/board.c b/arch/sandbox/lib/board.c index b7997e9a73..306d1ec332 100644 --- a/arch/sandbox/lib/board.c +++ b/arch/sandbox/lib/board.c @@ -134,6 +134,7 @@ init_fnc_t *init_sequence[] = { env_init, /* initialize environment */ serial_init, /* serial communications setup */ console_init_f, /* stage 1 init of console */ + sandbox_early_getopt_check, /* process command line flags (err/help) */ display_banner, /* say that we are here */ #if defined(CONFIG_DISPLAY_CPUINFO) print_cpuinfo, /* display cpu info (and speed) */ @@ -156,6 +157,14 @@ void board_init_f(ulong bootflag) memset((void *)gd, 0, sizeof(gd_t)); +#if defined(CONFIG_OF_EMBED) + /* Get a pointer to the FDT */ + gd->fdt_blob = _binary_dt_dtb_start; +#elif defined(CONFIG_OF_SEPARATE) + /* FDT is at end of image */ + gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE); +#endif + for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { if ((*init_fnc_ptr)() != 0) hang(); @@ -261,6 +270,8 @@ void board_init_r(gd_t *id, ulong dest_addr) post_run(NULL, POST_RAM | post_bootmode_get(0)); #endif + sandbox_main_loop_init(); + /* * For now, run the main loop. Later we might let this be done * in the main program. diff --git a/board/sandbox/sandbox/sandbox.c b/board/sandbox/sandbox/sandbox.c index f376c74357..98830139a5 100644 --- a/board/sandbox/sandbox/sandbox.c +++ b/board/sandbox/sandbox/sandbox.c @@ -34,6 +34,16 @@ void flush_cache(unsigned long start, unsigned long size) { } +ulong get_tbclk(void) +{ + return CONFIG_SYS_HZ; +} + +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + ulong get_timer(ulong base) { return (os_get_nsec() / 1000000) - base; diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 4375a55267..fb3b09ae74 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -34,6 +34,7 @@ COBJS-$(CONFIG_MXS_GPIO) += mxs_gpio.o COBJS-$(CONFIG_PCA953X) += pca953x.o COBJS-$(CONFIG_PCA9698) += pca9698.o COBJS-$(CONFIG_S5P) += s5p_gpio.o +COBJS-$(CONFIG_SANDBOX_GPIO) += sandbox.o COBJS-$(CONFIG_TEGRA2_GPIO) += tegra2_gpio.o COBJS-$(CONFIG_DA8XX_GPIO) += da8xx_gpio.o COBJS-$(CONFIG_ALTERA_PIO) += altera_pio.o diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c new file mode 100644 index 0000000000..19d2db0242 --- /dev/null +++ b/drivers/gpio/sandbox.c @@ -0,0 +1,209 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * 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 <asm/gpio.h> + +/* Flags for each GPIO */ +#define GPIOF_OUTPUT (1 << 0) /* Currently set as an output */ +#define GPIOF_HIGH (1 << 1) /* Currently set high */ +#define GPIOF_RESERVED (1 << 2) /* Is in use / requested */ + +struct gpio_state { + const char *label; /* label given by requester */ + u8 flags; /* flags (GPIOF_...) */ +}; + +/* + * State of GPIOs + * TODO: Put this into sandbox state + */ +static struct gpio_state state[CONFIG_SANDBOX_GPIO_COUNT]; + +/* Access routines for GPIO state */ +static u8 *get_gpio_flags(unsigned gp) +{ + /* assert()'s could be disabled, so make sure we handle that */ + assert(gp < ARRAY_SIZE(state)); + if (gp >= ARRAY_SIZE(state)) { + static u8 invalid_flags; + printf("sandbox_gpio: error: invalid gpio %u\n", gp); + return &invalid_flags; + } + + return &state[gp].flags; +} + +static int get_gpio_flag(unsigned gp, int flag) +{ + return (*get_gpio_flags(gp) & flag) != 0; +} + +static int set_gpio_flag(unsigned gp, int flag, int value) +{ + u8 *gpio = get_gpio_flags(gp); + + if (value) + *gpio |= flag; + else + *gpio &= ~flag; + + return 0; +} + +static int check_reserved(unsigned gpio, const char *func) +{ + if (!get_gpio_flag(gpio, GPIOF_RESERVED)) { + printf("sandbox_gpio: %s: error: gpio %u not reserved\n", + func, gpio); + return -1; + } + + return 0; +} + +/* + * Back-channel sandbox-internal-only access to GPIO state + */ + +int sandbox_gpio_get_value(unsigned gp) +{ + if (get_gpio_flag(gp, GPIOF_OUTPUT)) + debug("sandbox_gpio: get_value on output gpio %u\n", gp); + return get_gpio_flag(gp, GPIOF_HIGH); +} + +int sandbox_gpio_set_value(unsigned gp, int value) +{ + return set_gpio_flag(gp, GPIOF_HIGH, value); +} + +int sandbox_gpio_get_direction(unsigned gp) +{ + return get_gpio_flag(gp, GPIOF_OUTPUT); +} + +int sandbox_gpio_set_direction(unsigned gp, int output) +{ + return set_gpio_flag(gp, GPIOF_OUTPUT, output); +} + +/* + * These functions implement the public interface within U-Boot + */ + +/* set GPIO port 'gp' as an input */ +int gpio_direction_input(unsigned gp) +{ + debug("%s: gp:%u\n", __func__, gp); + + if (check_reserved(gp, __func__)) + return -1; + + return sandbox_gpio_set_direction(gp, 0); +} + +/* set GPIO port 'gp' as an output, with polarity 'value' */ +int gpio_direction_output(unsigned gp, int value) +{ + debug("%s: gp:%u, value = %d\n", __func__, gp, value); + + if (check_reserved(gp, __func__)) + return -1; + + return sandbox_gpio_set_direction(gp, 1) | + sandbox_gpio_set_value(gp, value); +} + +/* read GPIO IN value of port 'gp' */ +int gpio_get_value(unsigned gp) +{ + debug("%s: gp:%u\n", __func__, gp); + + if (check_reserved(gp, __func__)) + return -1; + + return sandbox_gpio_get_value(gp); +} + +/* write GPIO OUT value to port 'gp' */ +int gpio_set_value(unsigned gp, int value) +{ + debug("%s: gp:%u, value = %d\n", __func__, gp, value); + + if (check_reserved(gp, __func__)) + return -1; + + if (!sandbox_gpio_get_direction(gp)) { + printf("sandbox_gpio: error: set_value on input gpio %u\n", gp); + return -1; + } + + return sandbox_gpio_set_value(gp, value); +} + +int gpio_request(unsigned gp, const char *label) +{ + debug("%s: gp:%u, label:%s\n", __func__, gp, label); + + if (gp >= ARRAY_SIZE(state)) { + printf("sandbox_gpio: error: invalid gpio %u\n", gp); + return -1; + } + + if (get_gpio_flag(gp, GPIOF_RESERVED)) { + printf("sandbox_gpio: error: gpio %u already reserved\n", gp); + return -1; + } + + state[gp].label = label; + return set_gpio_flag(gp, GPIOF_RESERVED, 1); +} + +int gpio_free(unsigned gp) +{ + debug("%s: gp:%u\n", __func__, gp); + + if (check_reserved(gp, __func__)) + return -1; + + state[gp].label = NULL; + return set_gpio_flag(gp, GPIOF_RESERVED, 0); +} + +/* Display GPIO information */ +void gpio_info(void) +{ + unsigned gpio; + + puts("Sandbox GPIOs\n"); + + for (gpio = 0; gpio < ARRAY_SIZE(state); ++gpio) { + const char *label = state[gpio].label; + + printf("%4d: %s: %d [%c] %s\n", + gpio, + sandbox_gpio_get_direction(gpio) ? "out" : " in", + sandbox_gpio_get_value(gpio), + get_gpio_flag(gpio, GPIOF_RESERVED) ? 'x' : ' ', + label ? label : ""); + } +} diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h index 10565e69c3..a58a34e58c 100644 --- a/include/configs/sandbox.h +++ b/include/configs/sandbox.h @@ -28,6 +28,16 @@ /* Number of bits in a C 'long' on this architecture */ #define CONFIG_SANDBOX_BITS_PER_LONG 64 +#define CONFIG_OF_CONTROL +#define CONFIG_OF_LIBFDT +#define CONFIG_LMB + +#define CONFIG_SYS_VSNPRINTF + +#define CONFIG_CMD_GPIO +#define CONFIG_SANDBOX_GPIO +#define CONFIG_SANDBOX_GPIO_COUNT 20 + /* * Size of malloc() pool, although we don't actually use this yet. */ diff --git a/include/os.h b/include/os.h index f3af4f0e0e..699682a408 100644 --- a/include/os.h +++ b/include/os.h @@ -1,4 +1,9 @@ /* + * Operating System Interface + * + * This provides access to useful OS routines for the sandbox architecture. + * They are kept in a separate file so we can include system headers. + * * Copyright (c) 2011 The Chromium OS Authors. * See file CREDITS for list of people who contributed to this * project. @@ -19,11 +24,10 @@ * MA 02111-1307 USA */ -/* - * Operating System Interface - * - * This provides access to useful OS routines from the sandbox architecture - */ +#ifndef __OS_H__ +#define __OS_H__ + +struct sandbox_state; /** * Access to the OS read() system call @@ -46,6 +50,21 @@ ssize_t os_read(int fd, void *buf, size_t count); ssize_t os_write(int fd, const void *buf, size_t count); /** + * Access to the OS lseek() system call + * + * \param fd File descriptor as returned by os_open() + * \param offset File offset (based on whence) + * \param whence Position offset is relative to (see below) + * \return new file offset + */ +off_t os_lseek(int fd, off_t offset, int whence); + +/* Defines for "whence" in os_lseek() */ +#define OS_SEEK_SET 0 +#define OS_SEEK_CUR 1 +#define OS_SEEK_END 2 + +/** * Access to the OS open() system call * * \param pathname Pathname of file to open @@ -54,6 +73,12 @@ ssize_t os_write(int fd, const void *buf, size_t count); */ int os_open(const char *pathname, int flags); +#define OS_O_RDONLY 0 +#define OS_O_WRONLY 1 +#define OS_O_RDWR 2 +#define OS_O_MASK 3 /* Mask for read/write flags */ +#define OS_O_CREAT 0100 + /** * Access to the OS close() system call * @@ -70,7 +95,7 @@ int os_close(int fd); * * @param exit_code exit code for U-Boot */ -void os_exit(int exit_code); +void os_exit(int exit_code) __attribute__((noreturn)); /** * Put tty into raw mode to mimic serial console better @@ -98,3 +123,17 @@ void os_usleep(unsigned long usec); * \return A monotonic increasing time scaled in nano seconds */ u64 os_get_nsec(void); + +/** + * Parse arguments and update sandbox state. + * + * @param state Sandbox state to update + * @param argc Argument count + * @param argv Argument vector + * @return 0 if ok, and program should continue; + * 1 if ok, but program should stop; + * -1 on error: program should terminate. + */ +int os_parse_args(struct sandbox_state *state, int argc, char *argv[]); + +#endif |