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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>
This commit is contained in:
Thomas Chou 2015-12-01 17:00:22 +08:00
parent 9eed48c8be
commit 421f306f2c
1 changed files with 95 additions and 0 deletions
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95
drivers/mtd/altera_qspi.c
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@ -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))