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![Gustavo A. R. Silva](/assets/img/avatar_default.png)
Function print_drs_error is only used in drivers/mtd/lpddr/lpddr_cmds.c so, better to move it there. Also, notice that there's no need for inline as the function is used once. Lastly, fix the following checkpatch warning: WARNING: Prefer 'unsigned int' to bare use of 'unsigned' +static void print_drs_error(unsigned dsr) Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/e0063cbd65f3b47be1db34efc494ea3047634d88.1588016644.git.gustavo@embeddedor.com
763 lines
20 KiB
C
763 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* LPDDR flash memory device operations. This module provides read, write,
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* erase, lock/unlock support for LPDDR flash memories
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* (C) 2008 Korolev Alexey <akorolev@infradead.org>
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* (C) 2008 Vasiliy Leonenko <vasiliy.leonenko@gmail.com>
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* Many thanks to Roman Borisov for initial enabling
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*
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* TODO:
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* Implement VPP management
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* Implement XIP support
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* Implement OTP support
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*/
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#include <linux/mtd/pfow.h>
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#include <linux/mtd/qinfo.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len,
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size_t *retlen, u_char *buf);
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static int lpddr_write_buffers(struct mtd_info *mtd, loff_t to,
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size_t len, size_t *retlen, const u_char *buf);
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static int lpddr_writev(struct mtd_info *mtd, const struct kvec *vecs,
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unsigned long count, loff_t to, size_t *retlen);
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static int lpddr_erase(struct mtd_info *mtd, struct erase_info *instr);
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static int lpddr_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
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static int lpddr_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
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static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len,
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size_t *retlen, void **mtdbuf, resource_size_t *phys);
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static int lpddr_unpoint(struct mtd_info *mtd, loff_t adr, size_t len);
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static int get_chip(struct map_info *map, struct flchip *chip, int mode);
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static int chip_ready(struct map_info *map, struct flchip *chip, int mode);
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static void put_chip(struct map_info *map, struct flchip *chip);
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struct mtd_info *lpddr_cmdset(struct map_info *map)
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{
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struct lpddr_private *lpddr = map->fldrv_priv;
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struct flchip_shared *shared;
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struct flchip *chip;
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struct mtd_info *mtd;
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int numchips;
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int i, j;
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mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
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if (!mtd)
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return NULL;
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mtd->priv = map;
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mtd->type = MTD_NORFLASH;
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/* Fill in the default mtd operations */
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mtd->_read = lpddr_read;
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mtd->type = MTD_NORFLASH;
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mtd->flags = MTD_CAP_NORFLASH;
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mtd->flags &= ~MTD_BIT_WRITEABLE;
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mtd->_erase = lpddr_erase;
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mtd->_write = lpddr_write_buffers;
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mtd->_writev = lpddr_writev;
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mtd->_lock = lpddr_lock;
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mtd->_unlock = lpddr_unlock;
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if (map_is_linear(map)) {
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mtd->_point = lpddr_point;
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mtd->_unpoint = lpddr_unpoint;
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}
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mtd->size = 1 << lpddr->qinfo->DevSizeShift;
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mtd->erasesize = 1 << lpddr->qinfo->UniformBlockSizeShift;
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mtd->writesize = 1 << lpddr->qinfo->BufSizeShift;
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shared = kmalloc_array(lpddr->numchips, sizeof(struct flchip_shared),
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GFP_KERNEL);
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if (!shared) {
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kfree(mtd);
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return NULL;
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}
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chip = &lpddr->chips[0];
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numchips = lpddr->numchips / lpddr->qinfo->HWPartsNum;
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for (i = 0; i < numchips; i++) {
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shared[i].writing = shared[i].erasing = NULL;
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mutex_init(&shared[i].lock);
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for (j = 0; j < lpddr->qinfo->HWPartsNum; j++) {
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*chip = lpddr->chips[i];
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chip->start += j << lpddr->chipshift;
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chip->oldstate = chip->state = FL_READY;
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chip->priv = &shared[i];
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/* those should be reset too since
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they create memory references. */
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init_waitqueue_head(&chip->wq);
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mutex_init(&chip->mutex);
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chip++;
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}
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}
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return mtd;
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}
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EXPORT_SYMBOL(lpddr_cmdset);
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static void print_drs_error(unsigned int dsr)
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{
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int prog_status = (dsr & DSR_RPS) >> 8;
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if (!(dsr & DSR_AVAILABLE))
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pr_notice("DSR.15: (0) Device not Available\n");
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if ((prog_status & 0x03) == 0x03)
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pr_notice("DSR.9,8: (11) Attempt to program invalid half with 41h command\n");
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else if (prog_status & 0x02)
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pr_notice("DSR.9,8: (10) Object Mode Program attempt in region with Control Mode data\n");
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else if (prog_status & 0x01)
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pr_notice("DSR.9,8: (01) Program attempt in region with Object Mode data\n");
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if (!(dsr & DSR_READY_STATUS))
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pr_notice("DSR.7: (0) Device is Busy\n");
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if (dsr & DSR_ESS)
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pr_notice("DSR.6: (1) Erase Suspended\n");
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if (dsr & DSR_ERASE_STATUS)
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pr_notice("DSR.5: (1) Erase/Blank check error\n");
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if (dsr & DSR_PROGRAM_STATUS)
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pr_notice("DSR.4: (1) Program Error\n");
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if (dsr & DSR_VPPS)
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pr_notice("DSR.3: (1) Vpp low detect, operation aborted\n");
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if (dsr & DSR_PSS)
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pr_notice("DSR.2: (1) Program suspended\n");
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if (dsr & DSR_DPS)
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pr_notice("DSR.1: (1) Aborted Erase/Program attempt on locked block\n");
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}
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static int wait_for_ready(struct map_info *map, struct flchip *chip,
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unsigned int chip_op_time)
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{
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unsigned int timeo, reset_timeo, sleep_time;
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unsigned int dsr;
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flstate_t chip_state = chip->state;
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int ret = 0;
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/* set our timeout to 8 times the expected delay */
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timeo = chip_op_time * 8;
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if (!timeo)
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timeo = 500000;
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reset_timeo = timeo;
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sleep_time = chip_op_time / 2;
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for (;;) {
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dsr = CMDVAL(map_read(map, map->pfow_base + PFOW_DSR));
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if (dsr & DSR_READY_STATUS)
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break;
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if (!timeo) {
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printk(KERN_ERR "%s: Flash timeout error state %d \n",
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map->name, chip_state);
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ret = -ETIME;
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break;
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}
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/* OK Still waiting. Drop the lock, wait a while and retry. */
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mutex_unlock(&chip->mutex);
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if (sleep_time >= 1000000/HZ) {
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/*
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* Half of the normal delay still remaining
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* can be performed with a sleeping delay instead
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* of busy waiting.
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*/
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msleep(sleep_time/1000);
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timeo -= sleep_time;
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sleep_time = 1000000/HZ;
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} else {
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udelay(1);
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cond_resched();
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timeo--;
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}
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mutex_lock(&chip->mutex);
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while (chip->state != chip_state) {
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/* Someone's suspended the operation: sleep */
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DECLARE_WAITQUEUE(wait, current);
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(&chip->wq, &wait);
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mutex_unlock(&chip->mutex);
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schedule();
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remove_wait_queue(&chip->wq, &wait);
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mutex_lock(&chip->mutex);
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}
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if (chip->erase_suspended || chip->write_suspended) {
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/* Suspend has occurred while sleep: reset timeout */
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timeo = reset_timeo;
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chip->erase_suspended = chip->write_suspended = 0;
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}
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}
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/* check status for errors */
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if (dsr & DSR_ERR) {
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/* Clear DSR*/
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map_write(map, CMD(~(DSR_ERR)), map->pfow_base + PFOW_DSR);
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printk(KERN_WARNING"%s: Bad status on wait: 0x%x \n",
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map->name, dsr);
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print_drs_error(dsr);
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ret = -EIO;
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}
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chip->state = FL_READY;
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return ret;
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}
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static int get_chip(struct map_info *map, struct flchip *chip, int mode)
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{
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int ret;
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DECLARE_WAITQUEUE(wait, current);
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retry:
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if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING)
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&& chip->state != FL_SYNCING) {
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/*
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* OK. We have possibility for contension on the write/erase
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* operations which are global to the real chip and not per
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* partition. So let's fight it over in the partition which
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* currently has authority on the operation.
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*
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* The rules are as follows:
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*
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* - any write operation must own shared->writing.
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*
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* - any erase operation must own _both_ shared->writing and
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* shared->erasing.
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*
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* - contension arbitration is handled in the owner's context.
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*
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* The 'shared' struct can be read and/or written only when
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* its lock is taken.
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*/
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struct flchip_shared *shared = chip->priv;
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struct flchip *contender;
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mutex_lock(&shared->lock);
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contender = shared->writing;
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if (contender && contender != chip) {
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/*
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* The engine to perform desired operation on this
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* partition is already in use by someone else.
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* Let's fight over it in the context of the chip
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* currently using it. If it is possible to suspend,
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* that other partition will do just that, otherwise
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* it'll happily send us to sleep. In any case, when
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* get_chip returns success we're clear to go ahead.
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*/
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ret = mutex_trylock(&contender->mutex);
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mutex_unlock(&shared->lock);
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if (!ret)
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goto retry;
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mutex_unlock(&chip->mutex);
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ret = chip_ready(map, contender, mode);
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mutex_lock(&chip->mutex);
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if (ret == -EAGAIN) {
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mutex_unlock(&contender->mutex);
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goto retry;
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}
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if (ret) {
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mutex_unlock(&contender->mutex);
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return ret;
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}
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mutex_lock(&shared->lock);
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/* We should not own chip if it is already in FL_SYNCING
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* state. Put contender and retry. */
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if (chip->state == FL_SYNCING) {
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put_chip(map, contender);
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mutex_unlock(&contender->mutex);
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goto retry;
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}
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mutex_unlock(&contender->mutex);
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}
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/* Check if we have suspended erase on this chip.
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Must sleep in such a case. */
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if (mode == FL_ERASING && shared->erasing
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&& shared->erasing->oldstate == FL_ERASING) {
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mutex_unlock(&shared->lock);
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(&chip->wq, &wait);
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mutex_unlock(&chip->mutex);
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schedule();
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remove_wait_queue(&chip->wq, &wait);
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mutex_lock(&chip->mutex);
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goto retry;
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}
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/* We now own it */
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shared->writing = chip;
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if (mode == FL_ERASING)
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shared->erasing = chip;
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mutex_unlock(&shared->lock);
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}
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ret = chip_ready(map, chip, mode);
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if (ret == -EAGAIN)
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goto retry;
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return ret;
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}
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static int chip_ready(struct map_info *map, struct flchip *chip, int mode)
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{
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struct lpddr_private *lpddr = map->fldrv_priv;
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int ret = 0;
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DECLARE_WAITQUEUE(wait, current);
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/* Prevent setting state FL_SYNCING for chip in suspended state. */
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if (FL_SYNCING == mode && FL_READY != chip->oldstate)
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goto sleep;
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switch (chip->state) {
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case FL_READY:
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case FL_JEDEC_QUERY:
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return 0;
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case FL_ERASING:
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if (!lpddr->qinfo->SuspEraseSupp ||
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!(mode == FL_READY || mode == FL_POINT))
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goto sleep;
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map_write(map, CMD(LPDDR_SUSPEND),
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map->pfow_base + PFOW_PROGRAM_ERASE_SUSPEND);
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chip->oldstate = FL_ERASING;
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chip->state = FL_ERASE_SUSPENDING;
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ret = wait_for_ready(map, chip, 0);
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if (ret) {
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/* Oops. something got wrong. */
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/* Resume and pretend we weren't here. */
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put_chip(map, chip);
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printk(KERN_ERR "%s: suspend operation failed."
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"State may be wrong \n", map->name);
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return -EIO;
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}
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chip->erase_suspended = 1;
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chip->state = FL_READY;
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return 0;
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/* Erase suspend */
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case FL_POINT:
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/* Only if there's no operation suspended... */
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if (mode == FL_READY && chip->oldstate == FL_READY)
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return 0;
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fallthrough;
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default:
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sleep:
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set_current_state(TASK_UNINTERRUPTIBLE);
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add_wait_queue(&chip->wq, &wait);
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mutex_unlock(&chip->mutex);
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schedule();
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remove_wait_queue(&chip->wq, &wait);
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mutex_lock(&chip->mutex);
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return -EAGAIN;
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}
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}
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static void put_chip(struct map_info *map, struct flchip *chip)
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{
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if (chip->priv) {
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struct flchip_shared *shared = chip->priv;
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mutex_lock(&shared->lock);
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if (shared->writing == chip && chip->oldstate == FL_READY) {
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/* We own the ability to write, but we're done */
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shared->writing = shared->erasing;
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if (shared->writing && shared->writing != chip) {
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/* give back the ownership */
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struct flchip *loaner = shared->writing;
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mutex_lock(&loaner->mutex);
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mutex_unlock(&shared->lock);
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mutex_unlock(&chip->mutex);
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put_chip(map, loaner);
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mutex_lock(&chip->mutex);
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mutex_unlock(&loaner->mutex);
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wake_up(&chip->wq);
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return;
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}
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shared->erasing = NULL;
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shared->writing = NULL;
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} else if (shared->erasing == chip && shared->writing != chip) {
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/*
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* We own the ability to erase without the ability
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* to write, which means the erase was suspended
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* and some other partition is currently writing.
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* Don't let the switch below mess things up since
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* we don't have ownership to resume anything.
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*/
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mutex_unlock(&shared->lock);
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wake_up(&chip->wq);
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return;
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}
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mutex_unlock(&shared->lock);
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}
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switch (chip->oldstate) {
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case FL_ERASING:
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map_write(map, CMD(LPDDR_RESUME),
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map->pfow_base + PFOW_COMMAND_CODE);
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map_write(map, CMD(LPDDR_START_EXECUTION),
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map->pfow_base + PFOW_COMMAND_EXECUTE);
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chip->oldstate = FL_READY;
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chip->state = FL_ERASING;
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break;
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case FL_READY:
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break;
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default:
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printk(KERN_ERR "%s: put_chip() called with oldstate %d!\n",
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map->name, chip->oldstate);
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}
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wake_up(&chip->wq);
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}
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static int do_write_buffer(struct map_info *map, struct flchip *chip,
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unsigned long adr, const struct kvec **pvec,
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unsigned long *pvec_seek, int len)
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{
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struct lpddr_private *lpddr = map->fldrv_priv;
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map_word datum;
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int ret, wbufsize, word_gap, words;
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const struct kvec *vec;
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unsigned long vec_seek;
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unsigned long prog_buf_ofs;
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wbufsize = 1 << lpddr->qinfo->BufSizeShift;
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mutex_lock(&chip->mutex);
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ret = get_chip(map, chip, FL_WRITING);
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if (ret) {
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mutex_unlock(&chip->mutex);
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return ret;
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}
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/* Figure out the number of words to write */
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word_gap = (-adr & (map_bankwidth(map)-1));
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words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map);
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if (!word_gap) {
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words--;
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} else {
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word_gap = map_bankwidth(map) - word_gap;
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adr -= word_gap;
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datum = map_word_ff(map);
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}
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/* Write data */
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/* Get the program buffer offset from PFOW register data first*/
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prog_buf_ofs = map->pfow_base + CMDVAL(map_read(map,
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map->pfow_base + PFOW_PROGRAM_BUFFER_OFFSET));
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vec = *pvec;
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vec_seek = *pvec_seek;
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do {
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int n = map_bankwidth(map) - word_gap;
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if (n > vec->iov_len - vec_seek)
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n = vec->iov_len - vec_seek;
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if (n > len)
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n = len;
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if (!word_gap && (len < map_bankwidth(map)))
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datum = map_word_ff(map);
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datum = map_word_load_partial(map, datum,
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vec->iov_base + vec_seek, word_gap, n);
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len -= n;
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word_gap += n;
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if (!len || word_gap == map_bankwidth(map)) {
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map_write(map, datum, prog_buf_ofs);
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prog_buf_ofs += map_bankwidth(map);
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word_gap = 0;
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}
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vec_seek += n;
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if (vec_seek == vec->iov_len) {
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vec++;
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vec_seek = 0;
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}
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} while (len);
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*pvec = vec;
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*pvec_seek = vec_seek;
|
|
|
|
/* GO GO GO */
|
|
send_pfow_command(map, LPDDR_BUFF_PROGRAM, adr, wbufsize, NULL);
|
|
chip->state = FL_WRITING;
|
|
ret = wait_for_ready(map, chip, (1<<lpddr->qinfo->ProgBufferTime));
|
|
if (ret) {
|
|
printk(KERN_WARNING"%s Buffer program error: %d at %lx; \n",
|
|
map->name, ret, adr);
|
|
goto out;
|
|
}
|
|
|
|
out: put_chip(map, chip);
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int do_erase_oneblock(struct mtd_info *mtd, loff_t adr)
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int chipnum = adr >> lpddr->chipshift;
|
|
struct flchip *chip = &lpddr->chips[chipnum];
|
|
int ret;
|
|
|
|
mutex_lock(&chip->mutex);
|
|
ret = get_chip(map, chip, FL_ERASING);
|
|
if (ret) {
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
send_pfow_command(map, LPDDR_BLOCK_ERASE, adr, 0, NULL);
|
|
chip->state = FL_ERASING;
|
|
ret = wait_for_ready(map, chip, (1<<lpddr->qinfo->BlockEraseTime)*1000);
|
|
if (ret) {
|
|
printk(KERN_WARNING"%s Erase block error %d at : %llx\n",
|
|
map->name, ret, adr);
|
|
goto out;
|
|
}
|
|
out: put_chip(map, chip);
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len,
|
|
size_t *retlen, u_char *buf)
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int chipnum = adr >> lpddr->chipshift;
|
|
struct flchip *chip = &lpddr->chips[chipnum];
|
|
int ret = 0;
|
|
|
|
mutex_lock(&chip->mutex);
|
|
ret = get_chip(map, chip, FL_READY);
|
|
if (ret) {
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
map_copy_from(map, buf, adr, len);
|
|
*retlen = len;
|
|
|
|
put_chip(map, chip);
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len,
|
|
size_t *retlen, void **mtdbuf, resource_size_t *phys)
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int chipnum = adr >> lpddr->chipshift;
|
|
unsigned long ofs, last_end = 0;
|
|
struct flchip *chip = &lpddr->chips[chipnum];
|
|
int ret = 0;
|
|
|
|
if (!map->virt)
|
|
return -EINVAL;
|
|
|
|
/* ofs: offset within the first chip that the first read should start */
|
|
ofs = adr - (chipnum << lpddr->chipshift);
|
|
*mtdbuf = (void *)map->virt + chip->start + ofs;
|
|
|
|
while (len) {
|
|
unsigned long thislen;
|
|
|
|
if (chipnum >= lpddr->numchips)
|
|
break;
|
|
|
|
/* We cannot point across chips that are virtually disjoint */
|
|
if (!last_end)
|
|
last_end = chip->start;
|
|
else if (chip->start != last_end)
|
|
break;
|
|
|
|
if ((len + ofs - 1) >> lpddr->chipshift)
|
|
thislen = (1<<lpddr->chipshift) - ofs;
|
|
else
|
|
thislen = len;
|
|
/* get the chip */
|
|
mutex_lock(&chip->mutex);
|
|
ret = get_chip(map, chip, FL_POINT);
|
|
mutex_unlock(&chip->mutex);
|
|
if (ret)
|
|
break;
|
|
|
|
chip->state = FL_POINT;
|
|
chip->ref_point_counter++;
|
|
*retlen += thislen;
|
|
len -= thislen;
|
|
|
|
ofs = 0;
|
|
last_end += 1 << lpddr->chipshift;
|
|
chipnum++;
|
|
chip = &lpddr->chips[chipnum];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int lpddr_unpoint (struct mtd_info *mtd, loff_t adr, size_t len)
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int chipnum = adr >> lpddr->chipshift, err = 0;
|
|
unsigned long ofs;
|
|
|
|
/* ofs: offset within the first chip that the first read should start */
|
|
ofs = adr - (chipnum << lpddr->chipshift);
|
|
|
|
while (len) {
|
|
unsigned long thislen;
|
|
struct flchip *chip;
|
|
|
|
chip = &lpddr->chips[chipnum];
|
|
if (chipnum >= lpddr->numchips)
|
|
break;
|
|
|
|
if ((len + ofs - 1) >> lpddr->chipshift)
|
|
thislen = (1<<lpddr->chipshift) - ofs;
|
|
else
|
|
thislen = len;
|
|
|
|
mutex_lock(&chip->mutex);
|
|
if (chip->state == FL_POINT) {
|
|
chip->ref_point_counter--;
|
|
if (chip->ref_point_counter == 0)
|
|
chip->state = FL_READY;
|
|
} else {
|
|
printk(KERN_WARNING "%s: Warning: unpoint called on non"
|
|
"pointed region\n", map->name);
|
|
err = -EINVAL;
|
|
}
|
|
|
|
put_chip(map, chip);
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
len -= thislen;
|
|
ofs = 0;
|
|
chipnum++;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int lpddr_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
struct kvec vec;
|
|
|
|
vec.iov_base = (void *) buf;
|
|
vec.iov_len = len;
|
|
|
|
return lpddr_writev(mtd, &vec, 1, to, retlen);
|
|
}
|
|
|
|
|
|
static int lpddr_writev(struct mtd_info *mtd, const struct kvec *vecs,
|
|
unsigned long count, loff_t to, size_t *retlen)
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int ret = 0;
|
|
int chipnum;
|
|
unsigned long ofs, vec_seek, i;
|
|
int wbufsize = 1 << lpddr->qinfo->BufSizeShift;
|
|
size_t len = 0;
|
|
|
|
for (i = 0; i < count; i++)
|
|
len += vecs[i].iov_len;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
chipnum = to >> lpddr->chipshift;
|
|
|
|
ofs = to;
|
|
vec_seek = 0;
|
|
|
|
do {
|
|
/* We must not cross write block boundaries */
|
|
int size = wbufsize - (ofs & (wbufsize-1));
|
|
|
|
if (size > len)
|
|
size = len;
|
|
|
|
ret = do_write_buffer(map, &lpddr->chips[chipnum],
|
|
ofs, &vecs, &vec_seek, size);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ofs += size;
|
|
(*retlen) += size;
|
|
len -= size;
|
|
|
|
/* Be nice and reschedule with the chip in a usable
|
|
* state for other processes */
|
|
cond_resched();
|
|
|
|
} while (len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lpddr_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
unsigned long ofs, len;
|
|
int ret;
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int size = 1 << lpddr->qinfo->UniformBlockSizeShift;
|
|
|
|
ofs = instr->addr;
|
|
len = instr->len;
|
|
|
|
while (len > 0) {
|
|
ret = do_erase_oneblock(mtd, ofs);
|
|
if (ret)
|
|
return ret;
|
|
ofs += size;
|
|
len -= size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DO_XXLOCK_LOCK 1
|
|
#define DO_XXLOCK_UNLOCK 2
|
|
static int do_xxlock(struct mtd_info *mtd, loff_t adr, uint32_t len, int thunk)
|
|
{
|
|
int ret = 0;
|
|
struct map_info *map = mtd->priv;
|
|
struct lpddr_private *lpddr = map->fldrv_priv;
|
|
int chipnum = adr >> lpddr->chipshift;
|
|
struct flchip *chip = &lpddr->chips[chipnum];
|
|
|
|
mutex_lock(&chip->mutex);
|
|
ret = get_chip(map, chip, FL_LOCKING);
|
|
if (ret) {
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
if (thunk == DO_XXLOCK_LOCK) {
|
|
send_pfow_command(map, LPDDR_LOCK_BLOCK, adr, adr + len, NULL);
|
|
chip->state = FL_LOCKING;
|
|
} else if (thunk == DO_XXLOCK_UNLOCK) {
|
|
send_pfow_command(map, LPDDR_UNLOCK_BLOCK, adr, adr + len, NULL);
|
|
chip->state = FL_UNLOCKING;
|
|
} else
|
|
BUG();
|
|
|
|
ret = wait_for_ready(map, chip, 1);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: block unlock error status %d \n",
|
|
map->name, ret);
|
|
goto out;
|
|
}
|
|
out: put_chip(map, chip);
|
|
mutex_unlock(&chip->mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int lpddr_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
|
{
|
|
return do_xxlock(mtd, ofs, len, DO_XXLOCK_LOCK);
|
|
}
|
|
|
|
static int lpddr_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
|
|
{
|
|
return do_xxlock(mtd, ofs, len, DO_XXLOCK_UNLOCK);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Alexey Korolev <akorolev@infradead.org>");
|
|
MODULE_DESCRIPTION("MTD driver for LPDDR flash chips");
|