565 lines
10 KiB
C
565 lines
10 KiB
C
/*-
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* Copyright (c) 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <zlib.h>
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#include <stand.h>
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#include "api_public.h"
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#include "glue.h"
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#ifdef DEBUG
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#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt,##args); } while (0)
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#else
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#define debugf(fmt, args...)
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#endif
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/* Some random address used by U-Boot. */
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extern long uboot_address;
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static int
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valid_sig(struct api_signature *sig)
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{
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uint32_t checksum;
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struct api_signature s;
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if (sig == NULL)
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return (0);
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/*
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* Clear the checksum field (in the local copy) so as to calculate the
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* CRC with the same initial contents as at the time when the sig was
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* produced
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*/
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s = *sig;
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s.checksum = crc32(0, Z_NULL, 0);
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checksum = crc32(s.checksum, (void *)&s, sizeof(struct api_signature));
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if (checksum != sig->checksum)
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return (0);
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return (1);
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}
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/*
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* Checks to see if API signature's address was given to us as a command line
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* argument by U-Boot.
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*
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* returns 1/0 depending on found/not found result
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*/
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int
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api_parse_cmdline_sig(int argc, char **argv, struct api_signature **sig)
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{
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unsigned long api_address;
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int c;
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api_address = 0;
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opterr = 0;
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optreset = 1;
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optind = 1;
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while ((c = getopt (argc, argv, "a:")) != -1)
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switch (c) {
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case 'a':
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api_address = strtoul(optarg, NULL, 16);
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break;
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default:
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break;
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}
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if (api_address != 0) {
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*sig = (struct api_signature *)api_address;
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if (valid_sig(*sig))
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return (1);
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}
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return (0);
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}
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/*
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* Searches for the U-Boot API signature
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*
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* returns 1/0 depending on found/not found result
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*/
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int
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api_search_sig(struct api_signature **sig)
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{
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unsigned char *sp, *spend;
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if (sig == NULL)
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return (0);
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if (uboot_address == 0)
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uboot_address = 255 * 1024 * 1024;
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sp = (void *)(uboot_address & API_SIG_SEARCH_MASK);
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spend = sp + API_SIG_SEARCH_LEN - API_SIG_MAGLEN;
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while (sp < spend) {
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if (!bcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) {
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*sig = (struct api_signature *)sp;
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if (valid_sig(*sig))
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return (1);
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}
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sp += API_SIG_MAGLEN;
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}
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*sig = NULL;
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return (0);
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}
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/****************************************
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*
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* console
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*
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****************************************/
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int
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ub_getc(void)
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{
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int c;
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if (!syscall(API_GETC, NULL, &c))
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return (-1);
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return (c);
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}
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int
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ub_tstc(void)
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{
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int t;
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if (!syscall(API_TSTC, NULL, &t))
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return (-1);
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return (t);
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}
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void
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ub_putc(const char c)
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{
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syscall(API_PUTC, NULL, &c);
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}
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void
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ub_puts(const char *s)
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{
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syscall(API_PUTS, NULL, s);
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}
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/****************************************
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*
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* system
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*
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****************************************/
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void
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ub_reset(void)
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{
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syscall(API_RESET, NULL);
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while (1); /* fallback if API_RESET failed */
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__unreachable();
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}
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static struct mem_region mr[UB_MAX_MR];
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static struct sys_info si;
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struct sys_info *
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ub_get_sys_info(void)
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{
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int err = 0;
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memset(&si, 0, sizeof(struct sys_info));
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si.mr = mr;
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si.mr_no = UB_MAX_MR;
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memset(&mr, 0, sizeof(mr));
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if (!syscall(API_GET_SYS_INFO, &err, &si))
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return (NULL);
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return ((err) ? NULL : &si);
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}
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/****************************************
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*
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* timing
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*
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****************************************/
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void
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ub_udelay(unsigned long usec)
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{
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syscall(API_UDELAY, NULL, &usec);
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}
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unsigned long
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ub_get_timer(unsigned long base)
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{
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unsigned long cur;
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if (!syscall(API_GET_TIMER, NULL, &cur, &base))
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return (0);
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return (cur);
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}
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/****************************************************************************
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*
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* devices
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*
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* Devices are identified by handles: numbers 0, 1, 2, ..., UB_MAX_DEV-1
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*
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***************************************************************************/
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static struct device_info devices[UB_MAX_DEV];
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struct device_info *
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ub_dev_get(int i)
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{
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return ((i < 0 || i >= UB_MAX_DEV) ? NULL : &devices[i]);
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}
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/*
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* Enumerates the devices: fills out device_info elements in the devices[]
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* array.
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*
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* returns: number of devices found
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*/
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int
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ub_dev_enum(void)
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{
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struct device_info *di;
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int n = 0;
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memset(&devices, 0, sizeof(struct device_info) * UB_MAX_DEV);
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di = &devices[0];
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if (!syscall(API_DEV_ENUM, NULL, di))
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return (0);
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while (di->cookie != NULL) {
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if (++n >= UB_MAX_DEV)
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break;
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/* take another device_info */
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di++;
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/* pass on the previous cookie */
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di->cookie = devices[n - 1].cookie;
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if (!syscall(API_DEV_ENUM, NULL, di))
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return (0);
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}
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return (n);
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}
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/*
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* handle: 0-based id of the device
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*
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* returns: 0 when OK, err otherwise
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*/
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int
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ub_dev_open(int handle)
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{
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struct device_info *di;
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int err = 0;
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if (handle < 0 || handle >= UB_MAX_DEV)
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return (API_EINVAL);
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di = &devices[handle];
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if (!syscall(API_DEV_OPEN, &err, di))
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return (-1);
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return (err);
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}
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int
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ub_dev_close(int handle)
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{
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struct device_info *di;
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if (handle < 0 || handle >= UB_MAX_DEV)
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return (API_EINVAL);
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di = &devices[handle];
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if (!syscall(API_DEV_CLOSE, NULL, di))
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return (-1);
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return (0);
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}
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/*
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* Validates device for read/write, it has to:
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*
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* - have sane handle
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* - be opened
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*
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* returns: 0/1 accordingly
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*/
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static int
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dev_valid(int handle)
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{
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if (handle < 0 || handle >= UB_MAX_DEV)
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return (0);
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if (devices[handle].state != DEV_STA_OPEN)
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return (0);
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return (1);
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}
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static int
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dev_stor_valid(int handle)
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{
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if (!dev_valid(handle))
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return (0);
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if (!(devices[handle].type & DEV_TYP_STOR))
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return (0);
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return (1);
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}
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int
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ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start,
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lbasize_t *rlen)
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{
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struct device_info *di;
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lbasize_t act_len;
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int err = 0;
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if (!dev_stor_valid(handle))
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return (API_ENODEV);
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di = &devices[handle];
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if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len))
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return (API_ESYSC);
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if (!err && rlen)
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*rlen = act_len;
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return (err);
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}
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static int
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dev_net_valid(int handle)
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{
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if (!dev_valid(handle))
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return (0);
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if (devices[handle].type != DEV_TYP_NET)
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return (0);
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return (1);
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}
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int
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ub_dev_recv(int handle, void *buf, int len, int *rlen)
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{
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struct device_info *di;
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int err = 0, act_len;
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if (!dev_net_valid(handle))
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return (API_ENODEV);
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di = &devices[handle];
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if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len))
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return (API_ESYSC);
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if (!err)
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*rlen = act_len;
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return (err);
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}
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int
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ub_dev_send(int handle, void *buf, int len)
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{
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struct device_info *di;
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int err = 0;
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if (!dev_net_valid(handle))
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return (API_ENODEV);
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di = &devices[handle];
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if (!syscall(API_DEV_WRITE, &err, di, buf, &len))
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return (API_ESYSC);
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return (err);
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}
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char *
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ub_stor_type(int type)
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{
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if (type & DT_STOR_IDE)
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return ("IDE");
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if (type & DT_STOR_SCSI)
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return ("SCSI");
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if (type & DT_STOR_USB)
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return ("USB");
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if (type & DT_STOR_MMC)
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return ("MMC");
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if (type & DT_STOR_SATA)
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return ("SATA");
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return ("Unknown");
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}
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char *
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ub_mem_type(int flags)
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{
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switch (flags & 0x000F) {
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case MR_ATTR_FLASH:
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return ("FLASH");
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case MR_ATTR_DRAM:
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return ("DRAM");
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case MR_ATTR_SRAM:
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return ("SRAM");
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default:
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return ("Unknown");
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}
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}
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void
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ub_dump_di(int handle)
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{
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struct device_info *di = ub_dev_get(handle);
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int i;
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printf("device info (%d):\n", handle);
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printf(" cookie\t= %p\n", di->cookie);
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printf(" type\t\t= 0x%08x\n", di->type);
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if (di->type == DEV_TYP_NET) {
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printf(" hwaddr\t= ");
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for (i = 0; i < 6; i++)
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printf("%02x ", di->di_net.hwaddr[i]);
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printf("\n");
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} else if (di->type & DEV_TYP_STOR) {
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printf(" type\t\t= %s\n", ub_stor_type(di->type));
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printf(" blk size\t\t= %ld\n", di->di_stor.block_size);
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printf(" blk count\t\t= %ld\n", di->di_stor.block_count);
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}
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}
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void
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ub_dump_si(struct sys_info *si)
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{
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int i;
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printf("sys info:\n");
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printf(" clkbus\t= %ld MHz\n", si->clk_bus / 1000 / 1000);
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printf(" clkcpu\t= %ld MHz\n", si->clk_cpu / 1000 / 1000);
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printf(" bar\t\t= 0x%08lx\n", si->bar);
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printf("---\n");
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for (i = 0; i < si->mr_no; i++) {
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if (si->mr[i].flags == 0)
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break;
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printf(" start\t= 0x%08lx\n", si->mr[i].start);
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printf(" size\t= 0x%08lx\n", si->mr[i].size);
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printf(" type\t= %s\n", ub_mem_type(si->mr[i].flags));
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printf("---\n");
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}
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}
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/****************************************
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*
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* env vars
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*
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****************************************/
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char *
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ub_env_get(const char *name)
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{
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char *value;
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if (!syscall(API_ENV_GET, NULL, name, &value))
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return (NULL);
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return (value);
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}
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void
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ub_env_set(const char *name, char *value)
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{
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syscall(API_ENV_SET, NULL, name, value);
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}
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static char env_name[256];
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const char *
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ub_env_enum(const char *last)
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{
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const char *env, *str;
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int i;
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/*
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* It's OK to pass only the name piece as last (and not the whole
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* 'name=val' string), since the API_ENUM_ENV call uses envmatch()
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* internally, which handles such case
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*/
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env = NULL;
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if (!syscall(API_ENV_ENUM, NULL, last, &env))
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return (NULL);
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if (env == NULL || last == env)
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/* no more env. variables to enumerate */
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return (NULL);
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/* next enumerated env var */
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memset(env_name, 0, 256);
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for (i = 0, str = env; *str != '=' && *str != '\0';)
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env_name[i++] = *str++;
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env_name[i] = '\0';
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return (env_name);
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}
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