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authorThomas Chou <thomas@wytron.com.tw>2015-12-01 17:00:22 +0800
committerThomas Chou <thomas@wytron.com.tw>2015-12-06 11:31:25 +0800
commit421f306f2c8ced177d96704fa4cef8c6fbdc807c (patch)
tree7e84b7e9c034b361c6c28f18d0f6438a40ea9a75 /drivers
parent9eed48c8bec98425dbd995dd72c40e9ad7a8c26b (diff)
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altera_qspi: add lock unlock ops
Add lock() and unlock() mtd ops to altera_qspi. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Acked-by: Chin Liang See <clsee@altera.com> Reviewed-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/altera_qspi.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/mtd/altera_qspi.c b/drivers/mtd/altera_qspi.c
index 50c6e0e..61a6a5e 100644
--- a/drivers/mtd/altera_qspi.c
+++ b/drivers/mtd/altera_qspi.c
@@ -14,6 +14,14 @@
DECLARE_GLOBAL_DATA_PTR;
+/* The STATUS register */
+#define QUADSPI_SR_BP0 BIT(2)
+#define QUADSPI_SR_BP1 BIT(3)
+#define QUADSPI_SR_BP2 BIT(4)
+#define QUADSPI_SR_BP2_0 GENMASK(4, 2)
+#define QUADSPI_SR_BP3 BIT(6)
+#define QUADSPI_SR_TB BIT(5)
+
/*
* The QUADSPI_MEM_OP register is used to do memory protect and erase operations
*/
@@ -46,10 +54,24 @@ struct altera_qspi_platdata {
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* FLASH chips info */
+static void altera_qspi_get_locked_range(struct mtd_info *mtd, loff_t *ofs,
+ uint64_t *len);
+
void flash_print_info(flash_info_t *info)
{
+ struct mtd_info *mtd = info->mtd;
+ loff_t ofs;
+ u64 len;
+
printf("Altera QSPI flash Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
+ altera_qspi_get_locked_range(mtd, &ofs, &len);
+ printf(" %08lX +%lX", info->start[0], info->size);
+ if (len) {
+ printf(", protected %08llX +%llX",
+ info->start[0] + ofs, len);
+ }
+ putc('\n');
}
int flash_erase(flash_info_t *info, int s_first, int s_last)
@@ -171,6 +193,77 @@ static void altera_qspi_sync(struct mtd_info *mtd)
{
}
+static void altera_qspi_get_locked_range(struct mtd_info *mtd, loff_t *ofs,
+ uint64_t *len)
+{
+ struct udevice *dev = mtd->dev;
+ struct altera_qspi_platdata *pdata = dev_get_platdata(dev);
+ struct altera_qspi_regs *regs = pdata->regs;
+ int shift0 = ffs(QUADSPI_SR_BP2_0) - 1;
+ int shift3 = ffs(QUADSPI_SR_BP3) - 1 - 3;
+ u32 stat = readl(&regs->rd_status);
+ unsigned pow = ((stat & QUADSPI_SR_BP2_0) >> shift0) |
+ ((stat & QUADSPI_SR_BP3) >> shift3);
+
+ *ofs = 0;
+ *len = 0;
+ if (pow) {
+ *len = mtd->erasesize << (pow - 1);
+ if (*len > mtd->size)
+ *len = mtd->size;
+ if (!(stat & QUADSPI_SR_TB))
+ *ofs = mtd->size - *len;
+ }
+}
+
+static int altera_qspi_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct udevice *dev = mtd->dev;
+ struct altera_qspi_platdata *pdata = dev_get_platdata(dev);
+ struct altera_qspi_regs *regs = pdata->regs;
+ u32 sector_start, sector_end;
+ u32 num_sectors;
+ u32 mem_op;
+ u32 sr_bp;
+ u32 sr_tb;
+
+ num_sectors = mtd->size / mtd->erasesize;
+ sector_start = ofs / mtd->erasesize;
+ sector_end = (ofs + len) / mtd->erasesize;
+
+ if (sector_start >= num_sectors / 2) {
+ sr_bp = fls(num_sectors - 1 - sector_start) + 1;
+ sr_tb = 0;
+ } else if (sector_end < num_sectors / 2) {
+ sr_bp = fls(sector_end) + 1;
+ sr_tb = 1;
+ } else {
+ sr_bp = 15;
+ sr_tb = 0;
+ }
+
+ mem_op = (sr_tb << 12) | (sr_bp << 8);
+ mem_op |= QUADSPI_MEM_OP_SECTOR_PROTECT;
+ debug("lock %08x\n", mem_op);
+ writel(mem_op, &regs->mem_op);
+
+ return 0;
+}
+
+static int altera_qspi_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct udevice *dev = mtd->dev;
+ struct altera_qspi_platdata *pdata = dev_get_platdata(dev);
+ struct altera_qspi_regs *regs = pdata->regs;
+ u32 mem_op;
+
+ mem_op = QUADSPI_MEM_OP_SECTOR_PROTECT;
+ debug("unlock %08x\n", mem_op);
+ writel(mem_op, &regs->mem_op);
+
+ return 0;
+}
+
static int altera_qspi_probe(struct udevice *dev)
{
struct altera_qspi_platdata *pdata = dev_get_platdata(dev);
@@ -196,6 +289,8 @@ static int altera_qspi_probe(struct udevice *dev)
mtd->_read = altera_qspi_read;
mtd->_write = altera_qspi_write;
mtd->_sync = altera_qspi_sync;
+ mtd->_lock = altera_qspi_lock;
+ mtd->_unlock = altera_qspi_unlock;
mtd->numeraseregions = 0;
mtd->erasesize = 0x10000;
if (add_mtd_device(mtd))