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API for external applications.

Browse Source 
This is an API for external (standalone) applications running on top of
U-Boot, and is meant to be more extensible and robust than the existing
jumptable mechanism. It is similar to UNIX syscall approach. See api/README
for more details.

Included is the demo application using this new framework (api_examples).

Please note this is still an experimental feature, and is turned off by
default.

Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
This commit is contained in:
Rafal Jaworowski
2008-01-09 19:39:36 +01:00
parent 26a41790f8
commit 500856eb17
18 changed files with 2537 additions and 0 deletions
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40
api/Makefile Normal file
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#
# (C) Copyright 2007 Semihalf
#
# 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 Foundatio; 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 $(TOPDIR)/config.mk
LIB = $(obj)libapi.a
COBJS = api.o api_net.o api_storage.o api_platform-$(ARCH).o
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
all: $(LIB)
$(LIB): $(obj).depend $(OBJS)
$(AR) $(ARFLAGS) $@ $(OBJS)
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend

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U-Boot machine/arch independent API for external apps
=====================================================
1. Main assumptions
- there is a single entry point (syscall) to the API
- per current design the syscall is a C-callable function in the U-Boot
text, which might evolve into a real syscall using machine exception trap
once this initial version proves functional
- the consumer app is responsible for producing appropriate context (call
number and arguments)
- upon entry, the syscall dispatches the call to other (existing) U-Boot
functional areas like networking or storage operations
- consumer application will recognize the API is available by searching
a specified (assumed by convention) range of address space for the
signature
- the U-Boot integral part of the API is meant to be thin and non-intrusive,
leaving as much processing as possible on the consumer application side,
for example it doesn't keep states, but relies on hints from the app and
so on
- optional (CONFIG_API)
2. Calls
- console related (getc, putc, tstc etc.)
- system (reset, platform info)
- time (delay, current)
- env vars (enumerate all, get, set)
- devices (enumerate all, open, close, read, write); currently two classes
of devices are recognized and supported: network and storage (ide, scsi,
usb etc.)
3. Structure overview
- core API, integral part of U-Boot, mandatory
- implements the single entry point (mimics UNIX syscall)
- glue
- entry point at the consumer side, allows to make syscall, mandatory
part
- helper conveniency wrappers so that consumer app does not have to use
the syscall directly, but in a more friendly manner (a la libc calls),
optional part
- consumer application
- calls directly, or leverages the provided glue mid-layer

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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 <config.h>
#if defined(CONFIG_API)
#include <command.h>
#include <common.h>
#include <malloc.h>
#include <linux/types.h>
#include <api_public.h>
#include "api_private.h"
#define DEBUG
#undef DEBUG
/* U-Boot routines needed */
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
extern uchar (*env_get_char)(int);
extern uchar *env_get_addr(int);
/*****************************************************************************
*
* This is the API core.
*
* API_ functions are part of U-Boot code and constitute the lowest level
* calls:
*
* - they know what values they need as arguments
* - their direct return value pertains to the API_ "shell" itself (0 on
* success, some error code otherwise)
* - if the call returns a value it is buried within arguments
*
****************************************************************************/
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
typedef int (*cfp_t)(va_list argp);
static int calls_no;
/*
* pseudo signature:
*
* int API_getc(int *c)
*/
static int API_getc(va_list ap)
{
int *c;
if ((c = (int *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
*c = getc();
return 0;
}
/*
* pseudo signature:
*
* int API_tstc(int *c)
*/
static int API_tstc(va_list ap)
{
int *t;
if ((t = (int *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
*t = tstc();
return 0;
}
/*
* pseudo signature:
*
* int API_putc(char *ch)
*/
static int API_putc(va_list ap)
{
char *c;
if ((c = (char *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
putc(*c);
return 0;
}
/*
* pseudo signature:
*
* int API_puts(char **s)
*/
static int API_puts(va_list ap)
{
char *s;
if ((s = (char *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
puts(s);
return 0;
}
/*
* pseudo signature:
*
* int API_reset(void)
*/
static int API_reset(va_list ap)
{
do_reset(NULL, 0, 0, NULL);
/* NOT REACHED */
return 0;
}
/*
* pseudo signature:
*
* int API_get_sys_info(struct sys_info *si)
*
* fill out the sys_info struct containing selected parameters about the
* machine
*/
static int API_get_sys_info(va_list ap)
{
struct sys_info *si;
si = (struct sys_info *)va_arg(ap, u_int32_t);
if (si == NULL)
return API_ENOMEM;
return (platform_sys_info(si)) ? 0 : API_ENODEV;
}
/*
* pseudo signature:
*
* int API_udelay(unsigned long *udelay)
*/
static int API_udelay(va_list ap)
{
unsigned long *d;
if ((d = (unsigned long *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
udelay(*d);
return 0;
}
/*
* pseudo signature:
*
* int API_get_timer(unsigned long *current, unsigned long *base)
*/
static int API_get_timer(va_list ap)
{
unsigned long *base, *cur;
cur = (unsigned long *)va_arg(ap, u_int32_t);
if (cur == NULL)
return API_EINVAL;
base = (unsigned long *)va_arg(ap, u_int32_t);
if (base == NULL)
return API_EINVAL;
*cur = get_timer(*base);
return 0;
}
/*****************************************************************************
*
* pseudo signature:
*
* int API_dev_enum(struct device_info *)
*
*
* cookies uniqely identify the previously enumerated device instance and
* provide a hint for what to inspect in current enum iteration:
*
* - net: &eth_device struct address from list pointed to by eth_devices
*
* - storage: block_dev_desc_t struct address from &ide_dev_desc[n],
* &scsi_dev_desc[n] and similar tables
*
****************************************************************************/
static int API_dev_enum(va_list ap)
{
struct device_info *di;
/* arg is ptr to the device_info struct we are going to fill out */
di = (struct device_info *)va_arg(ap, u_int32_t);
if (di == NULL)
return API_EINVAL;
if (di->cookie == NULL) {
/* start over - clean up enumeration */
dev_enum_reset(); /* XXX shouldn't the name contain 'stor'? */
debugf("RESTART ENUM\n");
/* net device enumeration first */
if (dev_enum_net(di))
return 0;
}
/*
* The hidden assumption is there can only be one active network
* device and it is identified upon enumeration (re)start, so there's
* no point in trying to find network devices in other cases than the
* (re)start and hence the 'next' device can only be storage
*/
if (!dev_enum_storage(di))
/* make sure we mark there are no more devices */
di->cookie = NULL;
return 0;
}
static int API_dev_open(va_list ap)
{
struct device_info *di;
int err = 0;
/* arg is ptr to the device_info struct */
di = (struct device_info *)va_arg(ap, u_int32_t);
if (di == NULL)
return API_EINVAL;
/* Allow only one consumer of the device at a time */
if (di->state == DEV_STA_OPEN)
return API_EBUSY;
if (di->cookie == NULL)
return API_ENODEV;
if (di->type & DEV_TYP_STOR)
err = dev_open_stor(di->cookie);
else if (di->type & DEV_TYP_NET)
err = dev_open_net(di->cookie);
else
err = API_ENODEV;
if (!err)
di->state = DEV_STA_OPEN;
return err;
}
static int API_dev_close(va_list ap)
{
struct device_info *di;
int err = 0;
/* arg is ptr to the device_info struct */
di = (struct device_info *)va_arg(ap, u_int32_t);
if (di == NULL)
return API_EINVAL;
if (di->state == DEV_STA_CLOSED)
return 0;
if (di->cookie == NULL)
return API_ENODEV;
if (di->type & DEV_TYP_STOR)
err = dev_close_stor(di->cookie);
else if (di->type & DEV_TYP_NET)
err = dev_close_net(di->cookie);
else
/*
* In case of unknown device we cannot change its state, so
* only return error code
*/
err = API_ENODEV;
if (!err)
di->state = DEV_STA_CLOSED;
return err;
}
/*
* Notice: this is for sending network packets only, as U-Boot does not
* support writing to storage at the moment (12.2007)
*
* pseudo signature:
*
* int API_dev_write(
* struct device_info *di,
* void *buf,
* int *len
* )
*
* buf: ptr to buffer from where to get the data to send
*
* len: length of packet to be sent (in bytes)
*
*/
static int API_dev_write(va_list ap)
{
struct device_info *di;
void *buf;
int *len;
int err = 0;
/* 1. arg is ptr to the device_info struct */
di = (struct device_info *)va_arg(ap, u_int32_t);
if (di == NULL)
return API_EINVAL;
/* XXX should we check if device is open? i.e. the ->state ? */
if (di->cookie == NULL)
return API_ENODEV;
/* 2. arg is ptr to buffer from where to get data to write */
buf = (void *)va_arg(ap, u_int32_t);
if (buf == NULL)
return API_EINVAL;
/* 3. arg is length of buffer */
len = (int *)va_arg(ap, u_int32_t);
if (len == NULL)
return API_EINVAL;
if (*len <= 0)
return API_EINVAL;
if (di->type & DEV_TYP_STOR)
/*
* write to storage is currently not supported by U-Boot:
* no storage device implements block_write() method
*/
return API_ENODEV;
else if (di->type & DEV_TYP_NET)
err = dev_write_net(di->cookie, buf, *len);
else
err = API_ENODEV;
return err;
}
/*
* pseudo signature:
*
* int API_dev_read(
* struct device_info *di,
* void *buf,
* size_t *len,
* unsigned long *start
* size_t *act_len
* )
*
* buf: ptr to buffer where to put the read data
*
* len: ptr to length to be read
* - network: len of packet to read (in bytes)
* - storage: # of blocks to read (can vary in size depending on define)
*
* start: ptr to start block (only used for storage devices, ignored for
* network)
*
* act_len: ptr to where to put the len actually read
*/
static int API_dev_read(va_list ap)
{
struct device_info *di;
void *buf;
lbasize_t *len_stor, *act_len_stor;
lbastart_t *start;
int *len_net, *act_len_net;
/* 1. arg is ptr to the device_info struct */
di = (struct device_info *)va_arg(ap, u_int32_t);
if (di == NULL)
return API_EINVAL;
/* XXX should we check if device is open? i.e. the ->state ? */
if (di->cookie == NULL)
return API_ENODEV;
/* 2. arg is ptr to buffer from where to put the read data */
buf = (void *)va_arg(ap, u_int32_t);
if (buf == NULL)
return API_EINVAL;
if (di->type & DEV_TYP_STOR) {
/* 3. arg - ptr to var with # of blocks to read */
len_stor = (lbasize_t *)va_arg(ap, u_int32_t);
if (!len_stor)
return API_EINVAL;
if (*len_stor <= 0)
return API_EINVAL;
/* 4. arg - ptr to var with start block */
start = (lbastart_t *)va_arg(ap, u_int32_t);
/* 5. arg - ptr to var where to put the len actually read */
act_len_stor = (lbasize_t *)va_arg(ap, u_int32_t);
if (!act_len_stor)
return API_EINVAL;
*act_len_stor = dev_read_stor(di->cookie, buf, *len_stor, *start);
} else if (di->type & DEV_TYP_NET) {
/* 3. arg points to the var with length of packet to read */
len_net = (int *)va_arg(ap, u_int32_t);
if (!len_net)
return API_EINVAL;
if (*len_net <= 0)
return API_EINVAL;
/* 4. - ptr to var where to put the len actually read */
act_len_net = (int *)va_arg(ap, u_int32_t);
if (!act_len_net)
return API_EINVAL;
*act_len_net = dev_read_net(di->cookie, buf, *len_net);
} else
return API_ENODEV;
return 0;
}
/*
* pseudo signature:
*
* int API_env_get(const char *name, char **value)
*
* name: ptr to name of env var
*/
static int API_env_get(va_list ap)
{
char *name, **value;
if ((name = (char *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
if ((value = (char **)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
*value = getenv(name);
return 0;
}
/*
* pseudo signature:
*
* int API_env_set(const char *name, const char *value)
*
* name: ptr to name of env var
*
* value: ptr to value to be set
*/
static int API_env_set(va_list ap)
{
char *name, *value;
if ((name = (char *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
if ((value = (char *)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
setenv(name, value);
return 0;
}
/*
* pseudo signature:
*
* int API_env_enum(const char *last, char **next)
*
* last: ptr to name of env var found in last iteration
*/
static int API_env_enum(va_list ap)
{
int i, n;
char *last, **next;
last = (char *)va_arg(ap, u_int32_t);
if ((next = (char **)va_arg(ap, u_int32_t)) == NULL)
return API_EINVAL;
if (last == NULL)
/* start over */
*next = ((char *)env_get_addr(0));
else {
*next = last;
for (i = 0; env_get_char(i) != '\0'; i = n + 1) {
for (n = i; env_get_char(n) != '\0'; ++n) {
if (n >= CFG_ENV_SIZE) {
/* XXX shouldn't we set *next = NULL?? */
return 0;
}
}
if (envmatch((uchar *)last, i) < 0)
continue;
/* try to get next name */
i = n + 1;
if (env_get_char(i) == '\0') {
/* no more left */
*next = NULL;
return 0;
}
*next = ((char *)env_get_addr(i));
return 0;
}
}
return 0;
}
static cfp_t calls_table[API_MAXCALL] = { NULL, };
/*
* The main syscall entry point - this is not reentrant, only one call is
* serviced until finished.
*
* e.g. syscall(1, int *, u_int32_t, u_int32_t, u_int32_t, u_int32_t);
*
* call: syscall number
*
* retval: points to the return value placeholder, this is the place the
* syscall puts its return value, if NULL the caller does not
* expect a return value
*
* ... syscall arguments (variable number)
*
* returns: 0 if the call not found, 1 if serviced
*/
int syscall(int call, int *retval, ...)
{
va_list ap;
int rv;
if (call < 0 || call >= calls_no || calls_table[call] == NULL) {
debugf("invalid call #%d\n", call);
return 0;
}
if (calls_table[call] == NULL) {
debugf("syscall #%d does not have a handler\n", call);
return 0;
}
va_start(ap, retval);
rv = calls_table[call](ap);
if (retval != NULL)
*retval = rv;
return 1;
}
void api_init(void)
{
struct api_signature *sig = NULL;
/* TODO put this into linker set one day... */
calls_table[API_RSVD] = NULL;
calls_table[API_GETC] = &API_getc;
calls_table[API_PUTC] = &API_putc;
calls_table[API_TSTC] = &API_tstc;
calls_table[API_PUTS] = &API_puts;
calls_table[API_RESET] = &API_reset;
calls_table[API_GET_SYS_INFO] = &API_get_sys_info;
calls_table[API_UDELAY] = &API_udelay;
calls_table[API_GET_TIMER] = &API_get_timer;
calls_table[API_DEV_ENUM] = &API_dev_enum;
calls_table[API_DEV_OPEN] = &API_dev_open;
calls_table[API_DEV_CLOSE] = &API_dev_close;
calls_table[API_DEV_READ] = &API_dev_read;
calls_table[API_DEV_WRITE] = &API_dev_write;
calls_table[API_ENV_GET] = &API_env_get;
calls_table[API_ENV_SET] = &API_env_set;
calls_table[API_ENV_ENUM] = &API_env_enum;
calls_no = API_MAXCALL;
debugf("API initialized with %d calls\n", calls_no);
dev_stor_init();
/*
* Produce the signature so the API consumers can find it
*/
sig = malloc(sizeof(struct api_signature));
if (sig == NULL) {
printf("API: could not allocate memory for the signature!\n");
return;
}
debugf("API sig @ 0x%08x\n", sig);
memcpy(sig->magic, API_SIG_MAGIC, 8);
sig->version = API_SIG_VERSION;
sig->syscall = &syscall;
sig->checksum = 0;
sig->checksum = crc32(0, (unsigned char *)sig,
sizeof(struct api_signature));
debugf("syscall entry: 0x%08x\n", sig->syscall);
}
void platform_set_mr(struct sys_info *si, unsigned long start, unsigned long size,
int flags)
{
int i;
if (!si->mr || !size || (flags == 0))
return;
/* find free slot */
for (i = 0; i < si->mr_no; i++)
if (si->mr[i].flags == 0) {
/* insert new mem region */
si->mr[i].start = start;
si->mr[i].size = size;
si->mr[i].flags = flags;
return;
}
}
#endif /* CONFIG_API */

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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 <config.h>
#if defined(CONFIG_API)
#include <common.h>
#include <net.h>
#include <linux/types.h>
#include <api_public.h>
DECLARE_GLOBAL_DATA_PTR;
#define DEBUG
#undef DEBUG
#if !defined(CONFIG_NET_MULTI)
#error "API/net is currently only available for platforms with CONFIG_NET_MULTI"
#endif
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
static int dev_valid_net(void *cookie)
{
return ((void *)eth_get_dev() == cookie) ? 1 : 0;
}
int dev_open_net(void *cookie)
{
if (!dev_valid_net(cookie))
return API_ENODEV;
if (eth_init(gd->bd) < 0)
return API_EIO;
return 0;
}
int dev_close_net(void *cookie)
{
if (!dev_valid_net(cookie))
return API_ENODEV;
eth_halt();
return 0;
}
/*
* There can only be one active eth interface at a time - use what is
* currently set to eth_current
*/
int dev_enum_net(struct device_info *di)
{
struct eth_device *eth_current = eth_get_dev();
di->type = DEV_TYP_NET;
di->cookie = (void *)eth_current;
if (di->cookie == NULL)
return 0;
memcpy(di->di_net.hwaddr, eth_current->enetaddr, 6);
debugf("device found, returning cookie 0x%08x\n",
(u_int32_t)di->cookie);
return 1;
}
int dev_write_net(void *cookie, void *buf, int len)
{
/* XXX verify that cookie points to a valid net device??? */
return eth_send(buf, len);
}
int dev_read_net(void *cookie, void *buf, int len)
{
/* XXX verify that cookie points to a valid net device??? */
return eth_receive(buf, len);
}
#endif /* CONFIG_API */

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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
*
*
* This file contains routines that fetch data from ARM-dependent sources
* (bd_info etc.)
*
*/
#include <config.h>
#if defined(CONFIG_API)
#include <linux/types.h>
#include <api_public.h>
#include <asm/u-boot.h>
#include <asm/global_data.h>
#include "api_private.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* Important notice: handling of individual fields MUST be kept in sync with
* include/asm-arm/u-boot.h and include/asm-arm/global_data.h, so any changes
* need to reflect their current state and layout of structures involved!
*/
int platform_sys_info(struct sys_info *si)
{
int i;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
platform_set_mr(si, gd->bd->bi_dram[i].start,
gd->bd->bi_dram[i].size, MR_ATTR_DRAM);
return 1;
}
#endif /* CONFIG_API */

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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
*
*
* This file contains routines that fetch data from PowerPC-dependent sources
* (bd_info etc.)
*
*/
#include <config.h>
#if defined(CONFIG_API)
#include <linux/types.h>
#include <api_public.h>
#include <asm/u-boot.h>
#include <asm/global_data.h>
#include "api_private.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* Important notice: handling of individual fields MUST be kept in sync with
* include/asm-ppc/u-boot.h and include/asm-ppc/global_data.h, so any changes
* need to reflect their current state and layout of structures involved!
*/
int platform_sys_info(struct sys_info *si)
{
si->clk_bus = gd->bus_clk;
si->clk_cpu = gd->cpu_clk;
#if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) || \
defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
#define bi_bar bi_immr_base
#elif defined(CONFIG_MPC5xxx)
#define bi_bar bi_mbar_base
#elif defined(CONFIG_MPC83XX)
#define bi_bar bi_immrbar
#elif defined(CONFIG_MPC8220)
#define bi_bar bi_mbar_base
#endif
#if defined(bi_bar)
si->bar = gd->bd->bi_bar;
#undef bi_bar
#else
si->bar = NULL;
#endif
platform_set_mr(si, gd->bd->bi_memstart, gd->bd->bi_memsize, MR_ATTR_DRAM);
platform_set_mr(si, gd->bd->bi_flashstart, gd->bd->bi_flashsize, MR_ATTR_FLASH);
platform_set_mr(si, gd->bd->bi_sramstart, gd->bd->bi_sramsize, MR_ATTR_SRAM);
return 1;
}
#endif /* CONFIG_API */

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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 _API_PRIVATE_H_
#define _API_PRIVATE_H_
void api_init(void);
void platform_set_mr(struct sys_info *, unsigned long, unsigned long, int);
int platform_sys_info(struct sys_info *);
void dev_enum_reset(void);
int dev_enum_storage(struct device_info *);
int dev_enum_net(struct device_info *);
int dev_open_stor(void *);
int dev_open_net(void *);
int dev_close_stor(void *);
int dev_close_net(void *);
lbasize_t dev_read_stor(void *, void *, lbasize_t, lbastart_t);
int dev_read_net(void *, void *, int);
int dev_write_net(void *, void *, int);
void dev_stor_init(void);
#endif /* _API_PRIVATE_H_ */

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/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
* 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 <config.h>
#if defined(CONFIG_API)
#include <common.h>
#include <api_public.h>
#define DEBUG
#undef DEBUG
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
#define ENUM_IDE 0
#define ENUM_USB 1
#define ENUM_SCSI 2
#define ENUM_MMC 3
#define ENUM_MAX 4
struct stor_spec {
int max_dev;
int enum_started;
int enum_ended;
int type; /* "external" type: DT_STOR_{IDE,USB,etc} */
char name[4];
};
static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, "" }, };
void dev_stor_init(void)
{
#if (CONFIG_COMMANDS & CFG_CMD_IDE)
specs[ENUM_IDE].max_dev = CFG_IDE_MAXDEVICE;
specs[ENUM_IDE].enum_started = 0;
specs[ENUM_IDE].enum_ended = 0;
specs[ENUM_IDE].type = DEV_TYP_STOR | DT_STOR_IDE;
specs[ENUM_IDE].name = "ide";
#endif
#if (CONFIG_COMMANDS & CFG_CMD_USB)
specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV;
specs[ENUM_USB].enum_started = 0;
specs[ENUM_USB].enum_ended = 0;
specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB;
specs[ENUM_USB].name = "usb";
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
specs[ENUM_SCSI].max_dev = CFG_SCSI_MAX_DEVICE;
specs[ENUM_SCSI].enum_started = 0;
specs[ENUM_SCSI].enum_ended = 0;
specs[ENUM_SCSI].type = DEV_TYP_STOR | DT_STOR_SCSI;
specs[ENUM_SCSI].name = "scsi";
#endif
}
/*
* Finds next available device in the storage group
*
* type: storage group type - ENUM_IDE, ENUM_SCSI etc.
*
* first: if 1 the first device in the storage group is returned (if
* exists), if 0 the next available device is searched
*
* more: returns 0/1 depending if there are more devices in this group
* available (for future iterations)
*
* returns: 0/1 depending if device found in this iteration
*/
static int dev_stor_get(int type, int first, int *more, struct device_info *di)
{
int found = 0;
*more = 0;
int i;
block_dev_desc_t *dd;
if (first) {
di->cookie = (void *)get_dev(specs[type].name, 0);
found = 1;
} else {
for (i = 0; i < specs[type].max_dev; i++)
if (di->cookie == (void *)get_dev(specs[type].name, i)) {
/* previous cookie found -- advance to the
* next device, if possible */
if (++i >= specs[type].max_dev) {
/* out of range, no more to enum */
di->cookie = NULL;
break;
}
di->cookie = (void *)get_dev(specs[type].name, i);
found = 1;
/* provide hint if there are more devices in
* this group to enumerate */
if ((i + 1) < specs[type].max_dev)
*more = 1;
break;
}
}
if (found) {
di->type = specs[type].type;
if (di->cookie != NULL) {
dd = (block_dev_desc_t *)di->cookie;
if (dd->type == DEV_TYPE_UNKNOWN) {
debugf("device instance exists, but is not active..");
found = 0;
} else {
di->di_stor.block_count = dd->lba;
di->di_stor.block_size = dd->blksz;
}
}
} else
di->cookie = NULL;
return found;
}
/*
* returns: ENUM_IDE, ENUM_USB etc. based on block_dev_desc_t
*/
static int dev_stor_type(block_dev_desc_t *dd)
{
int i, j;
for (i = ENUM_IDE; i < ENUM_MAX; i++)
for (j = 0; j < specs[i].max_dev; j++)
if (dd == get_dev(specs[i].name, j))
return i;
return ENUM_MAX;
}
/*
* returns: 0/1 whether cookie points to some device in this group
*/
static int dev_is_stor(int type, struct device_info *di)
{
return (dev_stor_type(di->cookie) == type) ? 1 : 0;
}
static int dev_enum_stor(int type, struct device_info *di)
{
int found = 0, more = 0;
debugf("called, type %d\n", type);
/*
* Formulae for enumerating storage devices:
* 1. if cookie (hint from previous enum call) is NULL we start again
* with enumeration, so return the first available device, done.
*
* 2. if cookie is not NULL, check if it identifies some device in
* this group:
*
* 2a. if cookie is a storage device from our group (IDE, USB etc.),
* return next available (if exists) in this group
*
* 2b. if it isn't device from our group, check if such devices were
* ever enumerated before:
* - if not, return the first available device from this group
* - else return 0
*/
if (di->cookie == NULL) {
debugf("group%d - enum restart\n", type);
/*
* 1. Enumeration (re-)started: take the first available
* device, if exists
*/
found = dev_stor_get(type, 1, &more, di);
specs[type].enum_started = 1;
} else if (dev_is_stor(type, di)) {
debugf("group%d - enum continued for the next device\n", type);
if (specs[type].enum_ended) {
debugf("group%d - nothing more to enum!\n", type);
return 0;
}
/* 2a. Attempt to take a next available device in the group */
found = dev_stor_get(type, 0, &more, di);
} else {
if (specs[type].enum_ended) {
debugf("group %d - already enumerated, skipping\n", type);
return 0;
}
debugf("group%d - first time enum\n", type);
if (specs[type].enum_started == 0) {
/*
* 2b. If enumerating devices in this group did not
* happen before, it means the cookie pointed to a
* device frome some other group (another storage
* group, or network); in this case try to take the
* first available device from our group
*/
specs[type].enum_started = 1;
/*
* Attempt to take the first device in this group:
*'first element' flag is set
*/
found = dev_stor_get(type, 1, &more, di);
} else {
errf("group%d - out of order iteration\n", type);
found = 0;
more = 0;
}
}
/*
* If there are no more devices in this group, consider its
* enumeration finished
*/
specs[type].enum_ended = (!more) ? 1 : 0;
if (found)
debugf("device found, returning cookie 0x%08x\n",
(u_int32_t)di->cookie);
else
debugf("no device found\n");
return found;
}
void dev_enum_reset(void)
{
int i;
for (i = 0; i < ENUM_MAX; i ++) {
specs[i].enum_started = 0;
specs[i].enum_ended = 0;
}
}
int dev_enum_storage(struct device_info *di)
{
int i;
/*
* check: ide, usb, scsi, mmc
*/
for (i = ENUM_IDE; i < ENUM_MAX; i ++) {
if (dev_enum_stor(i, di))
return 1;
}
return 0;
}
static int dev_stor_is_valid(int type, block_dev_desc_t *dd)
{
int i;
for (i = 0; i < specs[type].max_dev; i++)
if (dd == get_dev(specs[type].name, i))
if (dd->type != DEV_TYPE_UNKNOWN)
return 1;
return 0;
}
int dev_open_stor(void *cookie)
{
int type = dev_stor_type(cookie);
if (type == ENUM_MAX)
return API_ENODEV;
if (dev_stor_is_valid(type, (block_dev_desc_t *)cookie))
return 0;
return API_ENODEV;
}
int dev_close_stor(void *cookie)
{
/*
* Not much to do as we actually do not alter storage devices upon
* close
*/
return 0;
}
static int dev_stor_index(block_dev_desc_t *dd)
{
int i, type;
type = dev_stor_type(dd);
for (i = 0; i < specs[type].max_dev; i++)
if (dd == get_dev(specs[type].name, i))
return i;
return (specs[type].max_dev);
}
lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
{
int type;
block_dev_desc_t *dd = (block_dev_desc_t *)cookie;
if ((type = dev_stor_type(dd)) == ENUM_MAX)
return 0;
if (!dev_stor_is_valid(type, dd))
return 0;
if ((dd->block_read) == NULL) {
debugf("no block_read() for device 0x%08x\n");
return 0;
}
return (dd->block_read(dev_stor_index(dd), start, len, buf));
}
#endif /* CONFIG_API */