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path: root/drivers/mtd/nand/nandsim.c
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Diffstat (limited to 'drivers/mtd/nand/nandsim.c')
-rw-r--r--drivers/mtd/nand/nandsim.c66
1 files changed, 46 insertions, 20 deletions
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index ecd70e2504f..556e8131ecd 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -28,6 +28,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
+#include <asm/div64.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/string.h>
@@ -207,13 +208,16 @@ MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the I
#define STATE_CMD_READID 0x0000000A /* read ID */
#define STATE_CMD_ERASE2 0x0000000B /* sector erase second command */
#define STATE_CMD_RESET 0x0000000C /* reset */
+#define STATE_CMD_RNDOUT 0x0000000D /* random output command */
+#define STATE_CMD_RNDOUTSTART 0x0000000E /* random output start command */
#define STATE_CMD_MASK 0x0000000F /* command states mask */
/* After an address is input, the simulator goes to one of these states */
#define STATE_ADDR_PAGE 0x00000010 /* full (row, column) address is accepted */
#define STATE_ADDR_SEC 0x00000020 /* sector address was accepted */
-#define STATE_ADDR_ZERO 0x00000030 /* one byte zero address was accepted */
-#define STATE_ADDR_MASK 0x00000030 /* address states mask */
+#define STATE_ADDR_COLUMN 0x00000030 /* column address was accepted */
+#define STATE_ADDR_ZERO 0x00000040 /* one byte zero address was accepted */
+#define STATE_ADDR_MASK 0x00000070 /* address states mask */
/* Durind data input/output the simulator is in these states */
#define STATE_DATAIN 0x00000100 /* waiting for data input */
@@ -240,7 +244,7 @@ MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the I
#define ACTION_OOBOFF 0x00600000 /* add to address OOB offset */
#define ACTION_MASK 0x00700000 /* action mask */
-#define NS_OPER_NUM 12 /* Number of operations supported by the simulator */
+#define NS_OPER_NUM 13 /* Number of operations supported by the simulator */
#define NS_OPER_STATES 6 /* Maximum number of states in operation */
#define OPT_ANY 0xFFFFFFFF /* any chip supports this operation */
@@ -373,7 +377,10 @@ static struct nandsim_operations {
{OPT_ANY, {STATE_CMD_READID, STATE_ADDR_ZERO, STATE_DATAOUT_ID, STATE_READY}},
/* Large page devices read page */
{OPT_LARGEPAGE, {STATE_CMD_READ0, STATE_ADDR_PAGE, STATE_CMD_READSTART | ACTION_CPY,
- STATE_DATAOUT, STATE_READY}}
+ STATE_DATAOUT, STATE_READY}},
+ /* Large page devices random page read */
+ {OPT_LARGEPAGE, {STATE_CMD_RNDOUT, STATE_ADDR_COLUMN, STATE_CMD_RNDOUTSTART | ACTION_CPY,
+ STATE_DATAOUT, STATE_READY}},
};
struct weak_block {
@@ -579,7 +586,8 @@ static int init_nandsim(struct mtd_info *mtd)
if (ns->busw == 16)
NS_WARN("16-bit flashes support wasn't tested\n");
- printk("flash size: %llu MiB\n", ns->geom.totsz >> 20);
+ printk("flash size: %llu MiB\n",
+ (unsigned long long)ns->geom.totsz >> 20);
printk("page size: %u bytes\n", ns->geom.pgsz);
printk("OOB area size: %u bytes\n", ns->geom.oobsz);
printk("sector size: %u KiB\n", ns->geom.secsz >> 10);
@@ -588,8 +596,9 @@ static int init_nandsim(struct mtd_info *mtd)
printk("bus width: %u\n", ns->busw);
printk("bits in sector size: %u\n", ns->geom.secshift);
printk("bits in page size: %u\n", ns->geom.pgshift);
- printk("bits in OOB size: %u\n", ns->geom.oobshift);
- printk("flash size with OOB: %llu KiB\n", ns->geom.totszoob >> 10);
+ printk("bits in OOB size: %u\n", ns->geom.oobshift);
+ printk("flash size with OOB: %llu KiB\n",
+ (unsigned long long)ns->geom.totszoob >> 10);
printk("page address bytes: %u\n", ns->geom.pgaddrbytes);
printk("sector address bytes: %u\n", ns->geom.secaddrbytes);
printk("options: %#x\n", ns->options);
@@ -937,12 +946,18 @@ static char *get_state_name(uint32_t state)
return "STATE_CMD_ERASE2";
case STATE_CMD_RESET:
return "STATE_CMD_RESET";
+ case STATE_CMD_RNDOUT:
+ return "STATE_CMD_RNDOUT";
+ case STATE_CMD_RNDOUTSTART:
+ return "STATE_CMD_RNDOUTSTART";
case STATE_ADDR_PAGE:
return "STATE_ADDR_PAGE";
case STATE_ADDR_SEC:
return "STATE_ADDR_SEC";
case STATE_ADDR_ZERO:
return "STATE_ADDR_ZERO";
+ case STATE_ADDR_COLUMN:
+ return "STATE_ADDR_COLUMN";
case STATE_DATAIN:
return "STATE_DATAIN";
case STATE_DATAOUT:
@@ -973,6 +988,7 @@ static int check_command(int cmd)
switch (cmd) {
case NAND_CMD_READ0:
+ case NAND_CMD_READ1:
case NAND_CMD_READSTART:
case NAND_CMD_PAGEPROG:
case NAND_CMD_READOOB:
@@ -982,7 +998,8 @@ static int check_command(int cmd)
case NAND_CMD_READID:
case NAND_CMD_ERASE2:
case NAND_CMD_RESET:
- case NAND_CMD_READ1:
+ case NAND_CMD_RNDOUT:
+ case NAND_CMD_RNDOUTSTART:
return 0;
case NAND_CMD_STATUS_MULTI:
@@ -1021,6 +1038,10 @@ static uint32_t get_state_by_command(unsigned command)
return STATE_CMD_ERASE2;
case NAND_CMD_RESET:
return STATE_CMD_RESET;
+ case NAND_CMD_RNDOUT:
+ return STATE_CMD_RNDOUT;
+ case NAND_CMD_RNDOUTSTART:
+ return STATE_CMD_RNDOUTSTART;
}
NS_ERR("get_state_by_command: unknown command, BUG\n");
@@ -1582,6 +1603,11 @@ static void switch_state(struct nandsim *ns)
ns->regs.num = 1;
break;
+ case STATE_ADDR_COLUMN:
+ /* Column address is always 2 bytes */
+ ns->regs.num = ns->geom.pgaddrbytes - ns->geom.secaddrbytes;
+ break;
+
default:
NS_ERR("switch_state: BUG! unknown address state\n");
}
@@ -1693,15 +1719,21 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte)
return;
}
- /*
- * Chip might still be in STATE_DATAOUT
- * (if OPT_AUTOINCR feature is supported), STATE_DATAOUT_STATUS or
- * STATE_DATAOUT_STATUS_M state. If so, switch state.
- */
+ /* Check that the command byte is correct */
+ if (check_command(byte)) {
+ NS_ERR("write_byte: unknown command %#x\n", (uint)byte);
+ return;
+ }
+
if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS
|| NS_STATE(ns->state) == STATE_DATAOUT_STATUS_M
- || ((ns->options & OPT_AUTOINCR) && NS_STATE(ns->state) == STATE_DATAOUT))
+ || NS_STATE(ns->state) == STATE_DATAOUT) {
+ int row = ns->regs.row;
+
switch_state(ns);
+ if (byte == NAND_CMD_RNDOUT)
+ ns->regs.row = row;
+ }
/* Check if chip is expecting command */
if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) {
@@ -1715,12 +1747,6 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte)
switch_to_ready_state(ns, NS_STATUS_FAILED(ns));
}
- /* Check that the command byte is correct */
- if (check_command(byte)) {
- NS_ERR("write_byte: unknown command %#x\n", (uint)byte);
- return;
- }
-
NS_DBG("command byte corresponding to %s state accepted\n",
get_state_name(get_state_by_command(byte)));
ns->regs.command = byte;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 16:02:21 +0000