--- /dev/null
+/*
+ * (C) Copyright 2008 Semihalf
+ *
+ * Written by: Piotr Ziecik <kosmo@semihalf.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <flash.h>
+#include <malloc.h>
+
+#include <asm/errno.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/concat.h>
+#include <mtd/cfi_flash.h>
+
+static struct mtd_info cfi_mtd_info[CFI_MAX_FLASH_BANKS];
+static char cfi_mtd_names[CFI_MAX_FLASH_BANKS][16];
+#ifdef CONFIG_MTD_CONCAT
+static char c_mtd_name[16];
+#endif
+
+static int cfi_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ flash_info_t *fi = mtd->priv;
+ size_t a_start = fi->start[0] + instr->addr;
+ size_t a_end = a_start + instr->len;
+ int s_first = -1;
+ int s_last = -1;
+ int error, sect;
+
+ for (sect = 0; sect < fi->sector_count; sect++) {
+ if (a_start == fi->start[sect])
+ s_first = sect;
+
+ if (sect < fi->sector_count - 1) {
+ if (a_end == fi->start[sect + 1]) {
+ s_last = sect;
+ break;
+ }
+ } else {
+ s_last = sect;
+ break;
+ }
+ }
+
+ if (s_first >= 0 && s_first <= s_last) {
+ instr->state = MTD_ERASING;
+
+ flash_set_verbose(0);
+ error = flash_erase(fi, s_first, s_last);
+ flash_set_verbose(1);
+
+ if (error) {
+ instr->state = MTD_ERASE_FAILED;
+ return -EIO;
+ }
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int cfi_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ flash_info_t *fi = mtd->priv;
+ u_char *f = (u_char*)(fi->start[0]) + from;
+
+ memcpy(buf, f, len);
+ *retlen = len;
+
+ return 0;
+}
+
+static int cfi_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ flash_info_t *fi = mtd->priv;
+ u_long t = fi->start[0] + to;
+ int error;
+
+ flash_set_verbose(0);
+ error = write_buff(fi, (u_char*)buf, t, len);
+ flash_set_verbose(1);
+
+ if (!error) {
+ *retlen = len;
+ return 0;
+ }
+
+ return -EIO;
+}
+
+static void cfi_mtd_sync(struct mtd_info *mtd)
+{
+ /*
+ * This function should wait until all pending operations
+ * finish. However this driver is fully synchronous, so
+ * this function returns immediately
+ */
+}
+
+static int cfi_mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ flash_info_t *fi = mtd->priv;
+
+ flash_set_verbose(0);
+ flash_protect(FLAG_PROTECT_SET, fi->start[0] + ofs,
+ fi->start[0] + ofs + len - 1, fi);
+ flash_set_verbose(1);
+
+ return 0;
+}
+
+static int cfi_mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ flash_info_t *fi = mtd->priv;
+
+ flash_set_verbose(0);
+ flash_protect(FLAG_PROTECT_CLEAR, fi->start[0] + ofs,
+ fi->start[0] + ofs + len - 1, fi);
+ flash_set_verbose(1);
+
+ return 0;
+}
+
+static int cfi_mtd_set_erasesize(struct mtd_info *mtd, flash_info_t *fi)
+{
+ int sect_size = 0;
+ int sect_size_old = 0;
+ int sect;
+ int regions = 0;
+ int numblocks = 0;
+ ulong offset;
+ ulong base_addr;
+
+ /*
+ * First detect the number of eraseregions so that we can allocate
+ * the array of eraseregions correctly
+ */
+ for (sect = 0; sect < fi->sector_count; sect++) {
+ if (sect_size_old != flash_sector_size(fi, sect))
+ regions++;
+ sect_size_old = flash_sector_size(fi, sect);
+ }
+
+ switch (regions) {
+ case 0:
+ return 1;
+ case 1: /* flash has uniform erase size */
+ mtd->numeraseregions = 0;
+ mtd->erasesize = sect_size_old;
+ return 0;
+ }
+
+ mtd->numeraseregions = regions;
+ mtd->eraseregions = malloc(sizeof(struct mtd_erase_region_info) * regions);
+
+ /*
+ * Now detect the largest sector and fill the eraseregions
+ */
+ regions = 0;
+ base_addr = offset = fi->start[0];
+ sect_size_old = flash_sector_size(fi, 0);
+ for (sect = 0; sect < fi->sector_count; sect++) {
+ if (sect_size_old != flash_sector_size(fi, sect)) {
+ mtd->eraseregions[regions].offset = offset - base_addr;
+ mtd->eraseregions[regions].erasesize = sect_size_old;
+ mtd->eraseregions[regions].numblocks = numblocks;
+ /* Now start counting the next eraseregions */
+ numblocks = 0;
+ regions++;
+ offset = fi->start[sect];
+ }
+ numblocks++;
+
+ /*
+ * Select the largest sector size as erasesize (e.g. for UBI)
+ */
+ if (flash_sector_size(fi, sect) > sect_size)
+ sect_size = flash_sector_size(fi, sect);
+
+ sect_size_old = flash_sector_size(fi, sect);
+ }
+
+ /*
+ * Set the last region
+ */
+ mtd->eraseregions[regions].offset = offset - base_addr;
+ mtd->eraseregions[regions].erasesize = sect_size_old;
+ mtd->eraseregions[regions].numblocks = numblocks;
+
+ mtd->erasesize = sect_size;
+
+ return 0;
+}
+
+int cfi_mtd_init(void)
+{
+ struct mtd_info *mtd;
+ flash_info_t *fi;
+ int error, i;
+#ifdef CONFIG_MTD_CONCAT
+ int devices_found = 0;
+ struct mtd_info *mtd_list[CONFIG_SYS_MAX_FLASH_BANKS];
+#endif
+
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ fi = &flash_info[i];
+ mtd = &cfi_mtd_info[i];
+
+ memset(mtd, 0, sizeof(struct mtd_info));
+
+ error = cfi_mtd_set_erasesize(mtd, fi);
+ if (error)
+ continue;
+
+ sprintf(cfi_mtd_names[i], "nor%d", i);
+ mtd->name = cfi_mtd_names[i];
+ mtd->type = MTD_NORFLASH;
+ mtd->flags = MTD_CAP_NORFLASH;
+ mtd->size = fi->size;
+ mtd->writesize = 1;
+
+ mtd->_erase = cfi_mtd_erase;
+ mtd->_read = cfi_mtd_read;
+ mtd->_write = cfi_mtd_write;
+ mtd->_sync = cfi_mtd_sync;
+ mtd->_lock = cfi_mtd_lock;
+ mtd->_unlock = cfi_mtd_unlock;
+ mtd->priv = fi;
+
+ if (add_mtd_device(mtd))
+ return -ENOMEM;
+
+#ifdef CONFIG_MTD_CONCAT
+ mtd_list[devices_found++] = mtd;
+#endif
+ }
+
+#ifdef CONFIG_MTD_CONCAT
+ if (devices_found > 1) {
+ /*
+ * We detected multiple devices. Concatenate them together.
+ */
+ sprintf(c_mtd_name, "nor%d", devices_found);
+ mtd = mtd_concat_create(mtd_list, devices_found, c_mtd_name);
+
+ if (mtd == NULL)
+ return -ENXIO;
+
+ if (add_mtd_device(mtd))
+ return -ENOMEM;
+ }
+#endif /* CONFIG_MTD_CONCAT */
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff