* [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim
@ 2019-04-17 18:54 Richard Weinberger
2019-04-17 18:54 ` [PATCH 2/2 v2] mtd: nandsim: switch to exec_op interface Richard Weinberger
2019-04-18 16:25 ` [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim Miquel Raynal
0 siblings, 2 replies; 3+ messages in thread
From: Richard Weinberger @ 2019-04-17 18:54 UTC (permalink / raw)
To: linux-mtd
Cc: bbrezillon, Richard Weinberger, linux-kernel, marek.vasut,
Boris Brezillon, miquel.raynal, computersforpeace, dwmw2
We will need struct nand_controller soon, so more stuff need to
be parts of struct nandsim.
While we are here, rename "nand" to "ns" to use the same naming scheme
everywhere in nandsim.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
---
drivers/mtd/nand/raw/nandsim.c | 49 +++++++++++++++++-----------------
1 file changed, 24 insertions(+), 25 deletions(-)
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
index 933d1a629c51..3d80e2d23b6e 100644
--- a/drivers/mtd/nand/raw/nandsim.c
+++ b/drivers/mtd/nand/raw/nandsim.c
@@ -298,6 +298,7 @@ union ns_mem {
* The structure which describes all the internal simulator data.
*/
struct nandsim {
+ struct nand_chip chip;
struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS];
unsigned int nbparts;
@@ -2216,7 +2217,7 @@ static const struct nand_controller_ops ns_controller_ops = {
static int __init ns_init_module(void)
{
struct nand_chip *chip;
- struct nandsim *nand;
+ struct nandsim *ns;
int retval = -ENOMEM, i;
if (bus_width != 8 && bus_width != 16) {
@@ -2224,16 +2225,14 @@ static int __init ns_init_module(void)
return -EINVAL;
}
- /* Allocate and initialize mtd_info, nand_chip and nandsim structures */
- chip = kzalloc(sizeof(struct nand_chip) + sizeof(struct nandsim),
- GFP_KERNEL);
- if (!chip) {
+ ns = kzalloc(sizeof(struct nandsim), GFP_KERNEL);
+ if (!ns) {
NS_ERR("unable to allocate core structures.\n");
return -ENOMEM;
}
+ chip = &ns->chip;
nsmtd = nand_to_mtd(chip);
- nand = (struct nandsim *)(chip + 1);
- nand_set_controller_data(chip, (void *)nand);
+ nand_set_controller_data(chip, (void *)ns);
/*
* Register simulator's callbacks.
@@ -2266,19 +2265,19 @@ static int __init ns_init_module(void)
* the initial ID read command correctly
*/
if (id_bytes[6] != 0xFF || id_bytes[7] != 0xFF)
- nand->geom.idbytes = 8;
+ ns->geom.idbytes = 8;
else if (id_bytes[4] != 0xFF || id_bytes[5] != 0xFF)
- nand->geom.idbytes = 6;
+ ns->geom.idbytes = 6;
else if (id_bytes[2] != 0xFF || id_bytes[3] != 0xFF)
- nand->geom.idbytes = 4;
+ ns->geom.idbytes = 4;
else
- nand->geom.idbytes = 2;
- nand->regs.status = NS_STATUS_OK(nand);
- nand->nxstate = STATE_UNKNOWN;
- nand->options |= OPT_PAGE512; /* temporary value */
- memcpy(nand->ids, id_bytes, sizeof(nand->ids));
+ ns->geom.idbytes = 2;
+ ns->regs.status = NS_STATUS_OK(ns);
+ ns->nxstate = STATE_UNKNOWN;
+ ns->options |= OPT_PAGE512; /* temporary value */
+ memcpy(ns->ids, id_bytes, sizeof(ns->ids));
if (bus_width == 16) {
- nand->busw = 16;
+ ns->busw = 16;
chip->options |= NAND_BUSWIDTH_16;
}
@@ -2323,27 +2322,27 @@ static int __init ns_init_module(void)
if ((retval = nand_create_bbt(chip)) != 0)
goto err_exit;
- if ((retval = parse_badblocks(nand, nsmtd)) != 0)
+ if ((retval = parse_badblocks(ns, nsmtd)) != 0)
goto err_exit;
/* Register NAND partitions */
- retval = mtd_device_register(nsmtd, &nand->partitions[0],
- nand->nbparts);
+ retval = mtd_device_register(nsmtd, &ns->partitions[0],
+ ns->nbparts);
if (retval != 0)
goto err_exit;
- if ((retval = nandsim_debugfs_create(nand)) != 0)
+ if ((retval = nandsim_debugfs_create(ns)) != 0)
goto err_exit;
return 0;
err_exit:
- free_nandsim(nand);
+ free_nandsim(ns);
nand_release(chip);
- for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i)
- kfree(nand->partitions[i].name);
+ for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i)
+ kfree(ns->partitions[i].name);
error:
- kfree(chip);
+ kfree(ns);
free_lists();
return retval;
@@ -2364,7 +2363,7 @@ static void __exit ns_cleanup_module(void)
nand_release(chip); /* Unregister driver */
for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i)
kfree(ns->partitions[i].name);
- kfree(mtd_to_nand(nsmtd)); /* Free other structures */
+ kfree(ns); /* Free other structures */
free_lists();
}
--
2.21.0
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^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 2/2 v2] mtd: nandsim: switch to exec_op interface
2019-04-17 18:54 [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim Richard Weinberger
@ 2019-04-17 18:54 ` Richard Weinberger
2019-04-18 16:25 ` [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim Miquel Raynal
1 sibling, 0 replies; 3+ messages in thread
From: Richard Weinberger @ 2019-04-17 18:54 UTC (permalink / raw)
To: linux-mtd
Cc: bbrezillon, Richard Weinberger, linux-kernel, marek.vasut,
Boris Brezillon, miquel.raynal, computersforpeace, dwmw2
Stop using the legacy interface.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
---
drivers/mtd/nand/raw/nandsim.c | 78 ++++++++++++++++++++--------------
1 file changed, 47 insertions(+), 31 deletions(-)
diff --git a/drivers/mtd/nand/raw/nandsim.c b/drivers/mtd/nand/raw/nandsim.c
index 3d80e2d23b6e..ba38ee70dd64 100644
--- a/drivers/mtd/nand/raw/nandsim.c
+++ b/drivers/mtd/nand/raw/nandsim.c
@@ -299,6 +299,7 @@ union ns_mem {
*/
struct nandsim {
struct nand_chip chip;
+ struct nand_controller base;
struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS];
unsigned int nbparts;
@@ -645,9 +646,6 @@ static int __init init_nandsim(struct mtd_info *mtd)
return -EIO;
}
- /* Force mtd to not do delays */
- chip->legacy.chip_delay = 0;
-
/* Initialize the NAND flash parameters */
ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8;
ns->geom.totsz = mtd->size;
@@ -2077,24 +2075,6 @@ static void ns_nand_write_byte(struct nand_chip *chip, u_char byte)
return;
}
-static void ns_hwcontrol(struct nand_chip *chip, int cmd, unsigned int bitmask)
-{
- struct nandsim *ns = nand_get_controller_data(chip);
-
- ns->lines.cle = bitmask & NAND_CLE ? 1 : 0;
- ns->lines.ale = bitmask & NAND_ALE ? 1 : 0;
- ns->lines.ce = bitmask & NAND_NCE ? 1 : 0;
-
- if (cmd != NAND_CMD_NONE)
- ns_nand_write_byte(chip, cmd);
-}
-
-static int ns_device_ready(struct nand_chip *chip)
-{
- NS_DBG("device_ready\n");
- return 1;
-}
-
static void ns_nand_write_buf(struct nand_chip *chip, const u_char *buf,
int len)
{
@@ -2146,7 +2126,7 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len)
int i;
for (i = 0; i < len; i++)
- buf[i] = chip->legacy.read_byte(chip);
+ buf[i] = ns_nand_read_byte(chip);
return;
}
@@ -2169,6 +2149,46 @@ static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len)
return;
}
+static int ns_exec_op(struct nand_chip *chip, const struct nand_operation *op,
+ bool check_only)
+{
+ int i;
+ unsigned int op_id;
+ const struct nand_op_instr *instr = NULL;
+ struct nandsim *ns = nand_get_controller_data(chip);
+
+ ns->lines.ce = 1;
+
+ for (op_id = 0; op_id < op->ninstrs; op_id++) {
+ instr = &op->instrs[op_id];
+ ns->lines.cle = 0;
+ ns->lines.ale = 0;
+
+ switch (instr->type) {
+ case NAND_OP_CMD_INSTR:
+ ns->lines.cle = 1;
+ ns_nand_write_byte(chip, instr->ctx.cmd.opcode);
+ break;
+ case NAND_OP_ADDR_INSTR:
+ ns->lines.ale = 1;
+ for (i = 0; i < instr->ctx.addr.naddrs; i++)
+ ns_nand_write_byte(chip, instr->ctx.addr.addrs[i]);
+ break;
+ case NAND_OP_DATA_IN_INSTR:
+ ns_nand_read_buf(chip, instr->ctx.data.buf.in, instr->ctx.data.len);
+ break;
+ case NAND_OP_DATA_OUT_INSTR:
+ ns_nand_write_buf(chip, instr->ctx.data.buf.out, instr->ctx.data.len);
+ break;
+ case NAND_OP_WAITRDY_INSTR:
+ /* we are always ready */
+ break;
+ }
+ }
+
+ return 0;
+}
+
static int ns_attach_chip(struct nand_chip *chip)
{
unsigned int eccsteps, eccbytes;
@@ -2209,6 +2229,7 @@ static int ns_attach_chip(struct nand_chip *chip)
static const struct nand_controller_ops ns_controller_ops = {
.attach_chip = ns_attach_chip,
+ .exec_op = ns_exec_op,
};
/*
@@ -2234,14 +2255,6 @@ static int __init ns_init_module(void)
nsmtd = nand_to_mtd(chip);
nand_set_controller_data(chip, (void *)ns);
- /*
- * Register simulator's callbacks.
- */
- chip->legacy.cmd_ctrl = ns_hwcontrol;
- chip->legacy.read_byte = ns_nand_read_byte;
- chip->legacy.dev_ready = ns_device_ready;
- chip->legacy.write_buf = ns_nand_write_buf;
- chip->legacy.read_buf = ns_nand_read_buf;
chip->ecc.mode = NAND_ECC_SOFT;
chip->ecc.algo = NAND_ECC_HAMMING;
/* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */
@@ -2292,7 +2305,10 @@ static int __init ns_init_module(void)
if ((retval = parse_gravepages()) != 0)
goto error;
- chip->legacy.dummy_controller.ops = &ns_controller_ops;
+ nand_controller_init(&ns->base);
+ ns->base.ops = &ns_controller_ops;
+ chip->controller = &ns->base;
+
retval = nand_scan(chip, 1);
if (retval) {
NS_ERR("Could not scan NAND Simulator device\n");
--
2.21.0
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim
2019-04-17 18:54 [PATCH 1/2 v2] mtd: nandsim: Embed struct nand_chip in struct nandsim Richard Weinberger
2019-04-17 18:54 ` [PATCH 2/2 v2] mtd: nandsim: switch to exec_op interface Richard Weinberger
@ 2019-04-18 16:25 ` Miquel Raynal
1 sibling, 0 replies; 3+ messages in thread
From: Miquel Raynal @ 2019-04-18 16:25 UTC (permalink / raw)
To: Richard Weinberger
Cc: bbrezillon, linux-kernel, marek.vasut, Boris Brezillon,
linux-mtd, computersforpeace, dwmw2
Hi Richard,
Richard Weinberger <richard@nod.at> wrote on Wed, 17 Apr 2019 20:54:32
+0200:
> We will need struct nand_controller soon, so more stuff need to
> be parts of struct nandsim.
> While we are here, rename "nand" to "ns" to use the same naming scheme
> everywhere in nandsim.
>
> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
> Signed-off-by: Richard Weinberger <richard@nod.at>
> ---
Both patches applied to
https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
branch nand/next.
Thanks,
Miquèl
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
^ permalink raw reply [flat|nested] 3+ messages in thread
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