| Message ID | 20230426072455.3887717-1-AVKrasnov@sberdevices.ru |
|---|---|
| State | Changes Requested |
| Delegated to: | Miquel Raynal |
| Headers | show |
| Series | [v1] mtd: rawnand: macronix: OTP access for MX30LFxG18AC | expand |
Hi Arseniy,
kernel test robot noticed the following build errors:
[auto build test ERROR on mtd/nand/next]
[also build test ERROR on linus/master v6.3 next-20230425]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
patch link: https://lore.kernel.org/r/20230426072455.3887717-1-AVKrasnov%40sberdevices.ru
patch subject: [PATCH v1] mtd: rawnand: macronix: OTP access for MX30LFxG18AC
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230426/202304261704.eyrD5KVk-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/3529f3465e99379489b59c035a8a0506c3756ef4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
git checkout 3529f3465e99379489b59c035a8a0506c3756ef4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/mtd/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304261704.eyrD5KVk-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
drivers/mtd/nand/raw/nand_macronix.c: In function '__macronix_30lfxg18ac_rw_otp':
>> drivers/mtd/nand/raw/nand_macronix.c:384:19: error: implicit declaration of function 'kmalloc'; did you mean 'mm_alloc'? [-Werror=implicit-function-declaration]
384 | dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
| ^~~~~~~
| mm_alloc
>> drivers/mtd/nand/raw/nand_macronix.c:384:17: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
384 | dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
| ^
>> drivers/mtd/nand/raw/nand_macronix.c:437:9: error: implicit declaration of function 'kfree'; did you mean 'kvfree'? [-Werror=implicit-function-declaration]
437 | kfree(dma_buf);
| ^~~~~
| kvfree
cc1: some warnings being treated as errors
vim +384 drivers/mtd/nand/raw/nand_macronix.c
366
367 static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd,
368 loff_t offs_in_flash,
369 size_t len, size_t *retlen,
370 u_char *buf, bool write)
371 {
372 struct nand_chip *nand;
373 size_t bytes_handled;
374 unsigned long page;
375 off_t offs_in_page;
376 void *dma_buf;
377 int ret;
378
379 /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer,
380 * so allocate properly aligned memory for it. This is
381 * needed because cross page accesses may lead to unaligned
382 * buffer address for DMA.
383 */
> 384 dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
385 if (!dma_buf)
386 return -ENOMEM;
387
388 nand = mtd_to_nand(mtd);
389 nand_select_target(nand, 0);
390
391 ret = macronix_30lfxg18ac_otp_enable(nand);
392 if (ret)
393 goto out_otp;
394
395 page = offs_in_flash;
396 /* 'page' will be result of division. */
397 offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
398 bytes_handled = 0;
399
400 while (bytes_handled < len &&
401 page < MACRONIX_30LFXG18AC_OTP_PAGES) {
402 size_t bytes_to_handle;
403
404 bytes_to_handle = min_t(size_t, len - bytes_handled,
405 MACRONIX_30LFXG18AC_OTP_PAGE_SIZE -
406 offs_in_page);
407
408 if (write) {
409 memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle);
410 ret = nand_prog_page_op(nand, page, offs_in_page,
411 dma_buf, bytes_to_handle);
412 } else {
413 ret = nand_read_page_op(nand, page, offs_in_page,
414 dma_buf, bytes_to_handle);
415 if (!ret)
416 memcpy(&buf[bytes_handled], dma_buf,
417 bytes_to_handle);
418 }
419 if (ret)
420 goto out_otp;
421
422 bytes_handled += bytes_to_handle;
423 offs_in_page = 0;
424 page++;
425 }
426
427 *retlen = bytes_handled;
428
429 out_otp:
430 if (ret)
431 dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret);
432
433 ret = macronix_30lfxg18ac_otp_disable(nand);
434 WARN(ret, "failed to leave OTP mode after %s\n",
435 write ? "write" : "read");
436 nand_deselect_target(nand);
> 437 kfree(dma_buf);
438
439 return ret;
440 }
441
Hi Arseniy,
kernel test robot noticed the following build errors:
[auto build test ERROR on mtd/nand/next]
[also build test ERROR on linus/master v6.3 next-20230425]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
patch link: https://lore.kernel.org/r/20230426072455.3887717-1-AVKrasnov%40sberdevices.ru
patch subject: [PATCH v1] mtd: rawnand: macronix: OTP access for MX30LFxG18AC
config: i386-randconfig-a001-20230424 (https://download.01.org/0day-ci/archive/20230426/202304262003.Lzpyh2BA-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/3529f3465e99379489b59c035a8a0506c3756ef4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
git checkout 3529f3465e99379489b59c035a8a0506c3756ef4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/mtd/nand/raw/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304262003.Lzpyh2BA-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
>> drivers/mtd/nand/raw/nand_macronix.c:384:12: error: implicit declaration of function 'kmalloc' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
^
drivers/mtd/nand/raw/nand_macronix.c:384:12: note: did you mean 'mm_alloc'?
include/linux/sched/mm.h:16:26: note: 'mm_alloc' declared here
extern struct mm_struct *mm_alloc(void);
^
>> drivers/mtd/nand/raw/nand_macronix.c:384:10: warning: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion]
dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mtd/nand/raw/nand_macronix.c:437:2: error: implicit declaration of function 'kfree' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
kfree(dma_buf);
^
1 warning and 2 errors generated.
vim +/kmalloc +384 drivers/mtd/nand/raw/nand_macronix.c
366
367 static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd,
368 loff_t offs_in_flash,
369 size_t len, size_t *retlen,
370 u_char *buf, bool write)
371 {
372 struct nand_chip *nand;
373 size_t bytes_handled;
374 unsigned long page;
375 off_t offs_in_page;
376 void *dma_buf;
377 int ret;
378
379 /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer,
380 * so allocate properly aligned memory for it. This is
381 * needed because cross page accesses may lead to unaligned
382 * buffer address for DMA.
383 */
> 384 dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
385 if (!dma_buf)
386 return -ENOMEM;
387
388 nand = mtd_to_nand(mtd);
389 nand_select_target(nand, 0);
390
391 ret = macronix_30lfxg18ac_otp_enable(nand);
392 if (ret)
393 goto out_otp;
394
395 page = offs_in_flash;
396 /* 'page' will be result of division. */
397 offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
398 bytes_handled = 0;
399
400 while (bytes_handled < len &&
401 page < MACRONIX_30LFXG18AC_OTP_PAGES) {
402 size_t bytes_to_handle;
403
404 bytes_to_handle = min_t(size_t, len - bytes_handled,
405 MACRONIX_30LFXG18AC_OTP_PAGE_SIZE -
406 offs_in_page);
407
408 if (write) {
409 memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle);
410 ret = nand_prog_page_op(nand, page, offs_in_page,
411 dma_buf, bytes_to_handle);
412 } else {
413 ret = nand_read_page_op(nand, page, offs_in_page,
414 dma_buf, bytes_to_handle);
415 if (!ret)
416 memcpy(&buf[bytes_handled], dma_buf,
417 bytes_to_handle);
418 }
419 if (ret)
420 goto out_otp;
421
422 bytes_handled += bytes_to_handle;
423 offs_in_page = 0;
424 page++;
425 }
426
427 *retlen = bytes_handled;
428
429 out_otp:
430 if (ret)
431 dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret);
432
433 ret = macronix_30lfxg18ac_otp_disable(nand);
434 WARN(ret, "failed to leave OTP mode after %s\n",
435 write ? "write" : "read");
436 nand_deselect_target(nand);
> 437 kfree(dma_buf);
438
439 return ret;
440 }
441
Hi Arseniy,
kernel test robot noticed the following build errors:
[auto build test ERROR on mtd/nand/next]
[also build test ERROR on linus/master v6.3 next-20230425]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
base: https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next
patch link: https://lore.kernel.org/r/20230426072455.3887717-1-AVKrasnov%40sberdevices.ru
patch subject: [PATCH v1] mtd: rawnand: macronix: OTP access for MX30LFxG18AC
config: hexagon-randconfig-r041-20230425 (https://download.01.org/0day-ci/archive/20230426/202304262101.pP2ae1ol-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/3529f3465e99379489b59c035a8a0506c3756ef4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Arseniy-Krasnov/mtd-rawnand-macronix-OTP-access-for-MX30LFxG18AC/20230426-153143
git checkout 3529f3465e99379489b59c035a8a0506c3756ef4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/mtd/nand/raw/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304262101.pP2ae1ol-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
>> drivers/mtd/nand/raw/nand_macronix.c:384:12: error: call to undeclared function 'kmalloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
^
drivers/mtd/nand/raw/nand_macronix.c:384:12: note: did you mean 'mm_alloc'?
include/linux/sched/mm.h:16:26: note: 'mm_alloc' declared here
extern struct mm_struct *mm_alloc(void);
^
>> drivers/mtd/nand/raw/nand_macronix.c:384:10: error: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion]
dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mtd/nand/raw/nand_macronix.c:397:17: warning: comparison of distinct pointer types ('typeof ((page)) *' (aka 'unsigned long *') and 'uint64_t *' (aka 'unsigned long long *')) [-Wcompare-distinct-pointer-types]
offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/div64.h:222:28: note: expanded from macro 'do_div'
(void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~
>> drivers/mtd/nand/raw/nand_macronix.c:397:17: error: incompatible pointer types passing 'unsigned long *' to parameter of type 'uint64_t *' (aka 'unsigned long long *') [-Werror,-Wincompatible-pointer-types]
offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/div64.h:238:22: note: expanded from macro 'do_div'
__rem = __div64_32(&(n), __base); \
^~~~
include/asm-generic/div64.h:213:38: note: passing argument to parameter 'dividend' here
extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
^
>> drivers/mtd/nand/raw/nand_macronix.c:437:2: error: call to undeclared function 'kfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
kfree(dma_buf);
^
drivers/mtd/nand/raw/nand_macronix.c:437:2: note: did you mean 'kvfree'?
include/linux/rcutiny.h:99:13: note: 'kvfree' declared here
extern void kvfree(const void *addr);
^
>> drivers/mtd/nand/raw/nand_macronix.c:397:17: warning: shift count >= width of type [-Wshift-count-overflow]
offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/div64.h:234:25: note: expanded from macro 'do_div'
} else if (likely(((n) >> 32) == 0)) { \
^ ~~
include/linux/compiler.h:77:40: note: expanded from macro 'likely'
# define likely(x) __builtin_expect(!!(x), 1)
^
2 warnings and 4 errors generated.
vim +/kmalloc +384 drivers/mtd/nand/raw/nand_macronix.c
366
367 static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd,
368 loff_t offs_in_flash,
369 size_t len, size_t *retlen,
370 u_char *buf, bool write)
371 {
372 struct nand_chip *nand;
373 size_t bytes_handled;
374 unsigned long page;
375 off_t offs_in_page;
376 void *dma_buf;
377 int ret;
378
379 /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer,
380 * so allocate properly aligned memory for it. This is
381 * needed because cross page accesses may lead to unaligned
382 * buffer address for DMA.
383 */
> 384 dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL);
385 if (!dma_buf)
386 return -ENOMEM;
387
388 nand = mtd_to_nand(mtd);
389 nand_select_target(nand, 0);
390
391 ret = macronix_30lfxg18ac_otp_enable(nand);
392 if (ret)
393 goto out_otp;
394
395 page = offs_in_flash;
396 /* 'page' will be result of division. */
> 397 offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE);
398 bytes_handled = 0;
399
400 while (bytes_handled < len &&
401 page < MACRONIX_30LFXG18AC_OTP_PAGES) {
402 size_t bytes_to_handle;
403
404 bytes_to_handle = min_t(size_t, len - bytes_handled,
405 MACRONIX_30LFXG18AC_OTP_PAGE_SIZE -
406 offs_in_page);
407
408 if (write) {
409 memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle);
410 ret = nand_prog_page_op(nand, page, offs_in_page,
411 dma_buf, bytes_to_handle);
412 } else {
413 ret = nand_read_page_op(nand, page, offs_in_page,
414 dma_buf, bytes_to_handle);
415 if (!ret)
416 memcpy(&buf[bytes_handled], dma_buf,
417 bytes_to_handle);
418 }
419 if (ret)
420 goto out_otp;
421
422 bytes_handled += bytes_to_handle;
423 offs_in_page = 0;
424 page++;
425 }
426
427 *retlen = bytes_handled;
428
429 out_otp:
430 if (ret)
431 dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret);
432
433 ret = macronix_30lfxg18ac_otp_disable(nand);
434 WARN(ret, "failed to leave OTP mode after %s\n",
435 write ? "write" : "read");
436 nand_deselect_target(nand);
> 437 kfree(dma_buf);
438
439 return ret;
440 }
441
diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 1472f925f386..c0d12979933a 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -31,6 +31,20 @@ #define MXIC_CMD_POWER_DOWN 0xB9 +#define ONFI_FEATURE_ADDR_30LFXG18AC_OTP 0x90 +#define MACRONIX_30LFXG18AC_OTP_START_PAGE 0 +#define MACRONIX_30LFXG18AC_OTP_PAGES 30 +#define MACRONIX_30LFXG18AC_OTP_PAGE_SIZE 2112 +#define MACRONIX_30LFXG18AC_OTP_START_BYTE \ + (MACRONIX_30LFXG18AC_OTP_START_PAGE * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) +#define MACRONIX_30LFXG18AC_OTP_SIZE_BYTES \ + (MACRONIX_30LFXG18AC_OTP_PAGES * \ + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE) + +#define MACRONIX_30LFXG18AC_OTP_EN BIT(0) +#define MACRONIX_30LFXG18AC_OTP_LOCKED BIT(1) + struct nand_onfi_vendor_macronix { u8 reserved; u8 reliability_func; @@ -316,6 +330,203 @@ static void macronix_nand_deep_power_down_support(struct nand_chip *chip) chip->ops.resume = mxic_nand_resume; } +static int macronix_30lfxg18ac_get_otp_info(struct mtd_info *mtd, size_t len, + size_t *retlen, + struct otp_info *buf) +{ + if (len < sizeof(*buf)) + return -EINVAL; + + /* Don't know how to check that OTP is locked. */ + buf->locked = 0; + buf->start = MACRONIX_30LFXG18AC_OTP_START_BYTE; + buf->length = MACRONIX_30LFXG18AC_OTP_SIZE_BYTES; + + *retlen = sizeof(*buf); + + return 0; +} + +static int macronix_30lfxg18ac_otp_enable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN; + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int macronix_30lfxg18ac_otp_disable(struct nand_chip *nand) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + + return nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); +} + +static int __macronix_30lfxg18ac_rw_otp(struct mtd_info *mtd, + loff_t offs_in_flash, + size_t len, size_t *retlen, + u_char *buf, bool write) +{ + struct nand_chip *nand; + size_t bytes_handled; + unsigned long page; + off_t offs_in_page; + void *dma_buf; + int ret; + + /* 'nand_prog/read_page_op()' may use 'buf' as DMA buffer, + * so allocate properly aligned memory for it. This is + * needed because cross page accesses may lead to unaligned + * buffer address for DMA. + */ + dma_buf = kmalloc(MACRONIX_30LFXG18AC_OTP_PAGE_SIZE, GFP_KERNEL); + if (!dma_buf) + return -ENOMEM; + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + ret = macronix_30lfxg18ac_otp_enable(nand); + if (ret) + goto out_otp; + + page = offs_in_flash; + /* 'page' will be result of division. */ + offs_in_page = do_div(page, MACRONIX_30LFXG18AC_OTP_PAGE_SIZE); + bytes_handled = 0; + + while (bytes_handled < len && + page < MACRONIX_30LFXG18AC_OTP_PAGES) { + size_t bytes_to_handle; + + bytes_to_handle = min_t(size_t, len - bytes_handled, + MACRONIX_30LFXG18AC_OTP_PAGE_SIZE - + offs_in_page); + + if (write) { + memcpy(dma_buf, &buf[bytes_handled], bytes_to_handle); + ret = nand_prog_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + } else { + ret = nand_read_page_op(nand, page, offs_in_page, + dma_buf, bytes_to_handle); + if (!ret) + memcpy(&buf[bytes_handled], dma_buf, + bytes_to_handle); + } + if (ret) + goto out_otp; + + bytes_handled += bytes_to_handle; + offs_in_page = 0; + page++; + } + + *retlen = bytes_handled; + +out_otp: + if (ret) + dev_err(&mtd->dev, "failed to perform OTP IO: %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after %s\n", + write ? "write" : "read"); + nand_deselect_target(nand); + kfree(dma_buf); + + return ret; +} + +static int macronix_30lfxg18ac_write_otp(struct mtd_info *mtd, loff_t to, + size_t len, size_t *rlen, + const u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, to, len, rlen, (u_char *)buf, + true); +} + +static int macronix_30lfxg18ac_read_otp(struct mtd_info *mtd, loff_t from, + size_t len, size_t *rlen, + u_char *buf) +{ + return __macronix_30lfxg18ac_rw_otp(mtd, from, len, rlen, buf, false); +} + +static int macronix_30lfxg18ac_lock_otp(struct mtd_info *mtd, loff_t from, + size_t len) +{ + uint8_t feature_buf[ONFI_SUBFEATURE_PARAM_LEN] = { 0 }; + struct nand_chip *nand; + int ret; + + if (from != MACRONIX_30LFXG18AC_OTP_START_BYTE || + len != MACRONIX_30LFXG18AC_OTP_SIZE_BYTES) + return -EINVAL; + + dev_dbg(&mtd->dev, "locking OTP\n"); + + nand = mtd_to_nand(mtd); + nand_select_target(nand, 0); + + feature_buf[0] = MACRONIX_30LFXG18AC_OTP_EN | + MACRONIX_30LFXG18AC_OTP_LOCKED; + ret = nand_set_features(nand, ONFI_FEATURE_ADDR_30LFXG18AC_OTP, + feature_buf); + if (ret) { + dev_err(&mtd->dev, + "failed to lock OTP (set features): %i\n", ret); + nand_deselect_target(nand); + return ret; + } + + /* Do dummy page prog with zero address. */ + feature_buf[0] = 0; + ret = nand_prog_page_op(nand, 0, 0, feature_buf, 1); + if (ret) + dev_err(&mtd->dev, + "failed to lock OTP (page prog): %i\n", ret); + + ret = macronix_30lfxg18ac_otp_disable(nand); + WARN(ret, "failed to leave OTP mode after lock\n"); + + nand_deselect_target(nand); + + return ret; +} + +static void macronix_nand_setup_otp(struct nand_chip *chip) +{ + static const char * const supported_otp_models[] = { + "MX30LF1G18AC", + "MX30LF2G18AC", + "MX30LF4G18AC", + }; + struct mtd_info *mtd; + + if (!chip->parameters.supports_set_get_features) + return; + + if (match_string(supported_otp_models, + ARRAY_SIZE(supported_otp_models), + chip->parameters.model) < 0) + return; + + bitmap_set(chip->parameters.get_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + bitmap_set(chip->parameters.set_feature_list, + ONFI_FEATURE_ADDR_30LFXG18AC_OTP, 1); + + mtd = nand_to_mtd(chip); + mtd->_get_fact_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_fact_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_get_user_prot_info = macronix_30lfxg18ac_get_otp_info; + mtd->_read_user_prot_reg = macronix_30lfxg18ac_read_otp; + mtd->_write_user_prot_reg = macronix_30lfxg18ac_write_otp; + mtd->_lock_user_prot_reg = macronix_30lfxg18ac_lock_otp; +} + static int macronix_nand_init(struct nand_chip *chip) { if (nand_is_slc(chip)) @@ -325,6 +536,7 @@ static int macronix_nand_init(struct nand_chip *chip) macronix_nand_onfi_init(chip); macronix_nand_block_protection_support(chip); macronix_nand_deep_power_down_support(chip); + macronix_nand_setup_otp(chip); return 0; }
This adds support for OTP area access on MX30LFxG18AC chip series. Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru> --- drivers/mtd/nand/raw/nand_macronix.c | 212 +++++++++++++++++++++++++++ 1 file changed, 212 insertions(+)