diff options
Diffstat (limited to 'api')
| -rw-r--r-- | api/Makefile | 40 | ||||
| -rw-r--r-- | api/README | 55 | ||||
| -rw-r--r-- | api/api.c | 670 | ||||
| -rw-r--r-- | api/api_net.c | 113 | ||||
| -rw-r--r-- | api/api_platform-arm.c | 60 | ||||
| -rw-r--r-- | api/api_platform-ppc.c | 79 | ||||
| -rw-r--r-- | api/api_private.h | 48 | ||||
| -rw-r--r-- | api/api_storage.c | 370 |
8 files changed, 1435 insertions, 0 deletions
diff --git a/api/Makefile b/api/Makefile new file mode 100644 index 0000000..94de3dc --- /dev/null +++ b/api/Makefile @@ -0,0 +1,40 @@ +# +# (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 diff --git a/api/README b/api/README new file mode 100644 index 0000000..c8f9c45 --- /dev/null +++ b/api/README @@ -0,0 +1,55 @@ +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 diff --git a/api/api.c b/api/api.c new file mode 100644 index 0000000..10f83eb --- /dev/null +++ b/api/api.c @@ -0,0 +1,670 @@ +/* + * (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: ð_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 */ diff --git a/api/api_net.c b/api/api_net.c new file mode 100644 index 0000000..9b20a17 --- /dev/null +++ b/api/api_net.c @@ -0,0 +1,113 @@ +/* + * (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 */ diff --git a/api/api_platform-arm.c b/api/api_platform-arm.c new file mode 100644 index 0000000..ca15ca5 --- /dev/null +++ b/api/api_platform-arm.c @@ -0,0 +1,60 @@ +/* + * (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 */ diff --git a/api/api_platform-ppc.c b/api/api_platform-ppc.c new file mode 100644 index 0000000..ca9f9a5 --- /dev/null +++ b/api/api_platform-ppc.c @@ -0,0 +1,79 @@ +/* + * (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 */ diff --git a/api/api_private.h b/api/api_private.h new file mode 100644 index 0000000..94a7fc5 --- /dev/null +++ b/api/api_private.h @@ -0,0 +1,48 @@ +/* + * (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_ */ diff --git a/api/api_storage.c b/api/api_storage.c new file mode 100644 index 0000000..7cd4efb --- /dev/null +++ b/api/api_storage.c @@ -0,0 +1,370 @@ +/* + * (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 */ |