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Diffstat (limited to 'ANDROID_3.4.5/drivers/mtd/lpddr/qinfo_probe.c')
-rw-r--r--ANDROID_3.4.5/drivers/mtd/lpddr/qinfo_probe.c252
1 files changed, 0 insertions, 252 deletions
diff --git a/ANDROID_3.4.5/drivers/mtd/lpddr/qinfo_probe.c b/ANDROID_3.4.5/drivers/mtd/lpddr/qinfo_probe.c
deleted file mode 100644
index dbfe17ba..00000000
--- a/ANDROID_3.4.5/drivers/mtd/lpddr/qinfo_probe.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * Probing flash chips with QINFO records.
- * (C) 2008 Korolev Alexey <akorolev@infradead.org>
- * (C) 2008 Vasiliy Leonenko <vasiliy.leonenko@gmail.com>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-
-#include <linux/mtd/xip.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/pfow.h>
-#include <linux/mtd/qinfo.h>
-
-static int lpddr_chip_setup(struct map_info *map, struct lpddr_private *lpddr);
-struct mtd_info *lpddr_probe(struct map_info *map);
-static struct lpddr_private *lpddr_probe_chip(struct map_info *map);
-static int lpddr_pfow_present(struct map_info *map,
- struct lpddr_private *lpddr);
-
-static struct qinfo_query_info qinfo_array[] = {
- /* General device info */
- {0, 0, "DevSizeShift", "Device size 2^n bytes"},
- {0, 3, "BufSizeShift", "Program buffer size 2^n bytes"},
- /* Erase block information */
- {1, 1, "TotalBlocksNum", "Total number of blocks"},
- {1, 2, "UniformBlockSizeShift", "Uniform block size 2^n bytes"},
- /* Partition information */
- {2, 1, "HWPartsNum", "Number of hardware partitions"},
- /* Optional features */
- {5, 1, "SuspEraseSupp", "Suspend erase supported"},
- /* Operation typical time */
- {10, 0, "SingleWordProgTime", "Single word program 2^n u-sec"},
- {10, 1, "ProgBufferTime", "Program buffer write 2^n u-sec"},
- {10, 2, "BlockEraseTime", "Block erase 2^n m-sec"},
- {10, 3, "FullChipEraseTime", "Full chip erase 2^n m-sec"},
-};
-
-static long lpddr_get_qinforec_pos(struct map_info *map, char *id_str)
-{
- int qinfo_lines = sizeof(qinfo_array)/sizeof(struct qinfo_query_info);
- int i;
- int bankwidth = map_bankwidth(map) * 8;
- int major, minor;
-
- for (i = 0; i < qinfo_lines; i++) {
- if (strcmp(id_str, qinfo_array[i].id_str) == 0) {
- major = qinfo_array[i].major & ((1 << bankwidth) - 1);
- minor = qinfo_array[i].minor & ((1 << bankwidth) - 1);
- return minor | (major << bankwidth);
- }
- }
- printk(KERN_ERR"%s qinfo id string is wrong! \n", map->name);
- BUG();
- return -1;
-}
-
-static uint16_t lpddr_info_query(struct map_info *map, char *id_str)
-{
- unsigned int dsr, val;
- int bits_per_chip = map_bankwidth(map) * 8;
- unsigned long adr = lpddr_get_qinforec_pos(map, id_str);
- int attempts = 20;
-
- /* Write a request for the PFOW record */
- map_write(map, CMD(LPDDR_INFO_QUERY),
- map->pfow_base + PFOW_COMMAND_CODE);
- map_write(map, CMD(adr & ((1 << bits_per_chip) - 1)),
- map->pfow_base + PFOW_COMMAND_ADDRESS_L);
- map_write(map, CMD(adr >> bits_per_chip),
- map->pfow_base + PFOW_COMMAND_ADDRESS_H);
- map_write(map, CMD(LPDDR_START_EXECUTION),
- map->pfow_base + PFOW_COMMAND_EXECUTE);
-
- while ((attempts--) > 0) {
- dsr = CMDVAL(map_read(map, map->pfow_base + PFOW_DSR));
- if (dsr & DSR_READY_STATUS)
- break;
- udelay(10);
- }
-
- val = CMDVAL(map_read(map, map->pfow_base + PFOW_COMMAND_DATA));
- return val;
-}
-
-static int lpddr_pfow_present(struct map_info *map, struct lpddr_private *lpddr)
-{
- map_word pfow_val[4];
-
- /* Check identification string */
- pfow_val[0] = map_read(map, map->pfow_base + PFOW_QUERY_STRING_P);
- pfow_val[1] = map_read(map, map->pfow_base + PFOW_QUERY_STRING_F);
- pfow_val[2] = map_read(map, map->pfow_base + PFOW_QUERY_STRING_O);
- pfow_val[3] = map_read(map, map->pfow_base + PFOW_QUERY_STRING_W);
-
- if (!map_word_equal(map, CMD('P'), pfow_val[0]))
- goto out;
-
- if (!map_word_equal(map, CMD('F'), pfow_val[1]))
- goto out;
-
- if (!map_word_equal(map, CMD('O'), pfow_val[2]))
- goto out;
-
- if (!map_word_equal(map, CMD('W'), pfow_val[3]))
- goto out;
-
- return 1; /* "PFOW" is found */
-out:
- printk(KERN_WARNING"%s: PFOW string at 0x%lx is not found \n",
- map->name, map->pfow_base);
- return 0;
-}
-
-static int lpddr_chip_setup(struct map_info *map, struct lpddr_private *lpddr)
-{
-
- lpddr->qinfo = kzalloc(sizeof(struct qinfo_chip), GFP_KERNEL);
- if (!lpddr->qinfo) {
- printk(KERN_WARNING "%s: no memory for LPDDR qinfo structure\n",
- map->name);
- return 0;
- }
-
- /* Get the ManuID */
- lpddr->ManufactId = CMDVAL(map_read(map, map->pfow_base + PFOW_MANUFACTURER_ID));
- /* Get the DeviceID */
- lpddr->DevId = CMDVAL(map_read(map, map->pfow_base + PFOW_DEVICE_ID));
- /* read parameters from chip qinfo table */
- lpddr->qinfo->DevSizeShift = lpddr_info_query(map, "DevSizeShift");
- lpddr->qinfo->TotalBlocksNum = lpddr_info_query(map, "TotalBlocksNum");
- lpddr->qinfo->BufSizeShift = lpddr_info_query(map, "BufSizeShift");
- lpddr->qinfo->HWPartsNum = lpddr_info_query(map, "HWPartsNum");
- lpddr->qinfo->UniformBlockSizeShift =
- lpddr_info_query(map, "UniformBlockSizeShift");
- lpddr->qinfo->SuspEraseSupp = lpddr_info_query(map, "SuspEraseSupp");
- lpddr->qinfo->SingleWordProgTime =
- lpddr_info_query(map, "SingleWordProgTime");
- lpddr->qinfo->ProgBufferTime = lpddr_info_query(map, "ProgBufferTime");
- lpddr->qinfo->BlockEraseTime = lpddr_info_query(map, "BlockEraseTime");
- return 1;
-}
-static struct lpddr_private *lpddr_probe_chip(struct map_info *map)
-{
- struct lpddr_private lpddr;
- struct lpddr_private *retlpddr;
- int numvirtchips;
-
-
- if ((map->pfow_base + 0x1000) >= map->size) {
- printk(KERN_NOTICE"%s Probe at base (0x%08lx) past the end of"
- "the map(0x%08lx)\n", map->name,
- (unsigned long)map->pfow_base, map->size - 1);
- return NULL;
- }
- memset(&lpddr, 0, sizeof(struct lpddr_private));
- if (!lpddr_pfow_present(map, &lpddr))
- return NULL;
-
- if (!lpddr_chip_setup(map, &lpddr))
- return NULL;
-
- /* Ok so we found a chip */
- lpddr.chipshift = lpddr.qinfo->DevSizeShift;
- lpddr.numchips = 1;
-
- numvirtchips = lpddr.numchips * lpddr.qinfo->HWPartsNum;
- retlpddr = kzalloc(sizeof(struct lpddr_private) +
- numvirtchips * sizeof(struct flchip), GFP_KERNEL);
- if (!retlpddr)
- return NULL;
-
- memcpy(retlpddr, &lpddr, sizeof(struct lpddr_private));
-
- retlpddr->numchips = numvirtchips;
- retlpddr->chipshift = retlpddr->qinfo->DevSizeShift -
- __ffs(retlpddr->qinfo->HWPartsNum);
-
- return retlpddr;
-}
-
-struct mtd_info *lpddr_probe(struct map_info *map)
-{
- struct mtd_info *mtd = NULL;
- struct lpddr_private *lpddr;
-
- /* First probe the map to see if we havecan open PFOW here */
- lpddr = lpddr_probe_chip(map);
- if (!lpddr)
- return NULL;
-
- map->fldrv_priv = lpddr;
- mtd = lpddr_cmdset(map);
- if (mtd) {
- if (mtd->size > map->size) {
- printk(KERN_WARNING "Reducing visibility of %ldKiB chip"
- "to %ldKiB\n", (unsigned long)mtd->size >> 10,
- (unsigned long)map->size >> 10);
- mtd->size = map->size;
- }
- return mtd;
- }
-
- kfree(lpddr->qinfo);
- kfree(lpddr);
- map->fldrv_priv = NULL;
- return NULL;
-}
-
-static struct mtd_chip_driver lpddr_chipdrv = {
- .probe = lpddr_probe,
- .name = "qinfo_probe",
- .module = THIS_MODULE
-};
-
-static int __init lpddr_probe_init(void)
-{
- register_mtd_chip_driver(&lpddr_chipdrv);
- return 0;
-}
-
-static void __exit lpddr_probe_exit(void)
-{
- unregister_mtd_chip_driver(&lpddr_chipdrv);
-}
-
-module_init(lpddr_probe_init);
-module_exit(lpddr_probe_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Vasiliy Leonenko <vasiliy.leonenko@gmail.com>");
-MODULE_DESCRIPTION("Driver to probe qinfo flash chips");
-
generated by cgit (git 2.34.1) at 2025-07-09 01:30:09 +0000