ce30e3ff1e
This is defined based on two other CONFIGs for all boards except sandbox and durian. For sandbox the value does not matter. For durian the value seems excessive. Drop the option completely, to simplify configuration and reduce the number of things we need to convert to Kconfig. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Stefan Roese <sr@denx.de>
378 lines
8.2 KiB
C
378 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2007-2008 Semihalf
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*
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* Written by: Rafal Jaworowski <raj@semihalf.com>
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*/
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#include <config.h>
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#include <common.h>
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#include <api_public.h>
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#include <part.h>
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#include <scsi.h>
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#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
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#include <usb.h>
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#endif
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#define DEBUG
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#undef DEBUG
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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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#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
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#define ENUM_IDE 0
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#define ENUM_USB 1
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#define ENUM_SCSI 2
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#define ENUM_MMC 3
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#define ENUM_SATA 4
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#define ENUM_MAX 5
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struct stor_spec {
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int max_dev;
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int enum_started;
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int enum_ended;
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int type; /* "external" type: DT_STOR_{IDE,USB,etc} */
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char *name;
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};
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static struct stor_spec specs[ENUM_MAX] = { { 0, 0, 0, 0, NULL }, };
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#ifndef CONFIG_SYS_MMC_MAX_DEVICE
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#define CONFIG_SYS_MMC_MAX_DEVICE 1
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#endif
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void dev_stor_init(void)
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{
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#if defined(CONFIG_IDE)
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specs[ENUM_IDE].max_dev = CONFIG_SYS_IDE_MAXDEVICE;
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specs[ENUM_IDE].enum_started = 0;
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specs[ENUM_IDE].enum_ended = 0;
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specs[ENUM_IDE].type = DEV_TYP_STOR | DT_STOR_IDE;
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specs[ENUM_IDE].name = "ide";
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#endif
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#if defined(CONFIG_CMD_MMC)
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specs[ENUM_MMC].max_dev = CONFIG_SYS_MMC_MAX_DEVICE;
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specs[ENUM_MMC].enum_started = 0;
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specs[ENUM_MMC].enum_ended = 0;
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specs[ENUM_MMC].type = DEV_TYP_STOR | DT_STOR_MMC;
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specs[ENUM_MMC].name = "mmc";
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#endif
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#if defined(CONFIG_SATA)
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specs[ENUM_SATA].max_dev = CONFIG_SYS_SATA_MAX_DEVICE;
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specs[ENUM_SATA].enum_started = 0;
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specs[ENUM_SATA].enum_ended = 0;
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specs[ENUM_SATA].type = DEV_TYP_STOR | DT_STOR_SATA;
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specs[ENUM_SATA].name = "sata";
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#endif
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#if defined(CONFIG_SCSI)
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specs[ENUM_SCSI].max_dev = SCSI_MAX_DEVICE;
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specs[ENUM_SCSI].enum_started = 0;
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specs[ENUM_SCSI].enum_ended = 0;
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specs[ENUM_SCSI].type = DEV_TYP_STOR | DT_STOR_SCSI;
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specs[ENUM_SCSI].name = "scsi";
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#endif
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#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
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specs[ENUM_USB].max_dev = USB_MAX_STOR_DEV;
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specs[ENUM_USB].enum_started = 0;
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specs[ENUM_USB].enum_ended = 0;
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specs[ENUM_USB].type = DEV_TYP_STOR | DT_STOR_USB;
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specs[ENUM_USB].name = "usb";
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#endif
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}
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/*
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* Finds next available device in the storage group
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*
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* type: storage group type - ENUM_IDE, ENUM_SCSI etc.
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*
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* more: returns 0/1 depending if there are more devices in this group
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* available (for future iterations)
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*
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* returns: 0/1 depending if device found in this iteration
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*/
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static int dev_stor_get(int type, int *more, struct device_info *di)
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{
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struct blk_desc *dd;
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int found = 0;
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int found_last = 0;
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int i = 0;
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/* Wasn't configured for this type, return 0 directly */
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if (specs[type].name == NULL)
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return 0;
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if (di->cookie != NULL) {
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/* Find the last device we've returned */
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for (i = 0; i < specs[type].max_dev; i++) {
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if (di->cookie ==
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(void *)blk_get_dev(specs[type].name, i)) {
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i += 1;
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found_last = 1;
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break;
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}
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}
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if (!found_last)
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i = 0;
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}
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for (; i < specs[type].max_dev; i++) {
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di->cookie = (void *)blk_get_dev(specs[type].name, i);
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if (di->cookie != NULL) {
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found = 1;
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break;
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}
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}
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if (i == specs[type].max_dev)
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*more = 0;
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else
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*more = 1;
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if (found) {
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di->type = specs[type].type;
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dd = (struct blk_desc *)di->cookie;
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if (dd->type == DEV_TYPE_UNKNOWN) {
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debugf("device instance exists, but is not active..");
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found = 0;
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} else {
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di->di_stor.block_count = dd->lba;
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di->di_stor.block_size = dd->blksz;
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}
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} else {
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di->cookie = NULL;
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}
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return found;
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}
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/* returns: ENUM_IDE, ENUM_USB etc. based on struct blk_desc */
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static int dev_stor_type(struct blk_desc *dd)
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{
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int i, j;
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for (i = ENUM_IDE; i < ENUM_MAX; i++)
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for (j = 0; j < specs[i].max_dev; j++)
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if (dd == blk_get_dev(specs[i].name, j))
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return i;
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return ENUM_MAX;
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}
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/* returns: 0/1 whether cookie points to some device in this group */
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static int dev_is_stor(int type, struct device_info *di)
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{
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return (dev_stor_type(di->cookie) == type) ? 1 : 0;
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}
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static int dev_enum_stor(int type, struct device_info *di)
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{
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int found = 0, more = 0;
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debugf("called, type %d\n", type);
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/*
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* Formulae for enumerating storage devices:
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* 1. if cookie (hint from previous enum call) is NULL we start again
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* with enumeration, so return the first available device, done.
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*
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* 2. if cookie is not NULL, check if it identifies some device in
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* this group:
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*
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* 2a. if cookie is a storage device from our group (IDE, USB etc.),
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* return next available (if exists) in this group
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*
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* 2b. if it isn't device from our group, check if such devices were
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* ever enumerated before:
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* - if not, return the first available device from this group
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* - else return 0
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*/
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if (di->cookie == NULL) {
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debugf("group%d - enum restart\n", type);
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/*
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* 1. Enumeration (re-)started: take the first available
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* device, if exists
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*/
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found = dev_stor_get(type, &more, di);
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specs[type].enum_started = 1;
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} else if (dev_is_stor(type, di)) {
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debugf("group%d - enum continued for the next device\n", type);
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if (specs[type].enum_ended) {
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debugf("group%d - nothing more to enum!\n", type);
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return 0;
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}
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/* 2a. Attempt to take a next available device in the group */
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found = dev_stor_get(type, &more, di);
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} else {
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if (specs[type].enum_ended) {
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debugf("group %d - already enumerated, skipping\n", type);
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return 0;
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}
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debugf("group%d - first time enum\n", type);
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if (specs[type].enum_started == 0) {
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/*
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* 2b. If enumerating devices in this group did not
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* happen before, it means the cookie pointed to a
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* device from some other group (another storage
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* group, or network); in this case try to take the
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* first available device from our group
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*/
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specs[type].enum_started = 1;
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/*
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* Attempt to take the first device in this group:
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*'first element' flag is set
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*/
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found = dev_stor_get(type, &more, di);
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} else {
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errf("group%d - out of order iteration\n", type);
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found = 0;
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more = 0;
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}
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}
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/*
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* If there are no more devices in this group, consider its
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* enumeration finished
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*/
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specs[type].enum_ended = (!more) ? 1 : 0;
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if (found)
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debugf("device found, returning cookie 0x%08x\n",
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(u_int32_t)di->cookie);
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else
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debugf("no device found\n");
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return found;
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}
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void dev_enum_reset(void)
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{
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int i;
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for (i = 0; i < ENUM_MAX; i ++) {
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specs[i].enum_started = 0;
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specs[i].enum_ended = 0;
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}
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}
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int dev_enum_storage(struct device_info *di)
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{
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int i;
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/* check: ide, usb, scsi, mmc */
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for (i = ENUM_IDE; i < ENUM_MAX; i ++) {
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if (dev_enum_stor(i, di))
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return 1;
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}
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return 0;
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}
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static int dev_stor_is_valid(int type, struct blk_desc *dd)
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{
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int i;
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for (i = 0; i < specs[type].max_dev; i++)
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if (dd == blk_get_dev(specs[type].name, i))
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if (dd->type != DEV_TYPE_UNKNOWN)
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return 1;
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return 0;
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}
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int dev_open_stor(void *cookie)
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{
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int type = dev_stor_type(cookie);
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if (type == ENUM_MAX)
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return API_ENODEV;
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if (dev_stor_is_valid(type, (struct blk_desc *)cookie))
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return 0;
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return API_ENODEV;
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}
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int dev_close_stor(void *cookie)
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{
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/*
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* Not much to do as we actually do not alter storage devices upon
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* close
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*/
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return 0;
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}
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lbasize_t dev_read_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
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{
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int type;
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struct blk_desc *dd = (struct blk_desc *)cookie;
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if ((type = dev_stor_type(dd)) == ENUM_MAX)
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return 0;
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if (!dev_stor_is_valid(type, dd))
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return 0;
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#ifdef CONFIG_BLK
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return blk_dread(dd, start, len, buf);
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#else
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if ((dd->block_read) == NULL) {
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debugf("no block_read() for device 0x%08x\n", cookie);
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return 0;
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}
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return dd->block_read(dd, start, len, buf);
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#endif /* defined(CONFIG_BLK) */
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}
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lbasize_t dev_write_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
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{
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struct blk_desc *dd = (struct blk_desc *)cookie;
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int type = dev_stor_type(dd);
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if (type == ENUM_MAX)
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return 0;
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if (!dev_stor_is_valid(type, dd))
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return 0;
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#ifdef CONFIG_BLK
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return blk_dwrite(dd, start, len, buf);
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#else
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if (dd->block_write == NULL) {
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debugf("no block_write() for device 0x%08x\n", cookie);
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return 0;
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}
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return dd->block_write(dd, start, len, buf);
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#endif /* defined(CONFIG_BLK) */
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}
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