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* mtd: dataflash: Say if we find a device we don't supportMark Brown2013-11-071-1/+1
| | | | | | | | | | Ensure that the error message if we identify a flash we don't know how to talk to is displayed on the console in order to aid diagnostics. While we're at convert the message to use dev_info() rather than our hand rolled version of it for consistency. Signed-off-by: Mark Brown <broonie@linaro.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: m25p80: fixup device removal failure pathBrian Norris2013-11-071-3/+1
| | | | | | | Device removal should fail if MTD unregistration fails. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de>
* mtd: m25p80: add support for Macronix mx25l3255eBrian Norris2013-11-071-0/+1
| | | | | | | A new 32Mbit SPI NOR flash from Macronix. Nothing special. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Marek Vasut <marex@denx.de>
* mtd: m25p80: remove 'disabled' device checkBrian Norris2013-11-071-6/+1
| | | | | | | | | | | | | | | | | | | | | It seems like the following commit was never necessary commit 5f949137952020214cd167093dd7be448f21c079 Author: Shaohui Xie <Shaohui.Xie@freescale.com> Date: Fri Oct 14 15:49:00 2011 +0800 mtd: m25p80: don't probe device which has status of 'disabled' because it duplicates the code in of_platform_device_create_pdata() which ensures that 'disabled' nodes are never instantiated. Also, drop the __maybe_unused. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Sourav Poddar <sourav.poddar@ti.com> Reviewed-by: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: <devicetree@vger.kernel.org>
* mtd: m25p80: remove M25PXX_USE_FAST_READ KconfigBrian Norris2013-11-072-12/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the compile-time option for FAST_READ, since we have run-time support for detecting it. This refactors the logic for enabling fast-read, such that for DT-enabled devices, we honor the "m25p,fast-read" property but for non-DT devices, we default to using FAST_READ whenever the flash device supports it. Normal READ and FAST_READ differ only in the following: * FAST_READ supports SPI higher clock frequencies [1] * number of dummy cycles; FAST_READ requires 8 dummy cycles (whereas READ requires 0) to allow the flash sufficient setup time, even when running at higher clock speeds Thus, for flash chips which support FAST_READ, there is otherwise no limiting reason why we cannot use the FAST_READ opcode instead of READ. It simply allows the SPI controller to run at higher clock rates. So theoretically, nobody should be needing the compile-time option anyway. [1] I have a Spansion S25FL128S datasheet which says: "The maximum operating clock frequency for the READ command is 50 MHz." And: "The maximum operating clock frequency for FAST READ command is 133 MHz." Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: m25p80: re-align ID entriesBrian Norris2013-11-071-16/+16
| | | | | | | No change in the table data. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
* mtd: m25p80: remove obsolete FIXMEBrian Norris2013-11-071-9/+0
| | | | | | | | The FIXME and NOTE have already been fixed (we have FAST_READ support). Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Sourav Poddar <sourav.poddar@ti.com> Acked-by: Marek Vasut <marex@denx.de>
* mtd: m25p80: fix allocation sizeBrian Norris2013-11-071-13/+7
| | | | | | | | | | | | | | | | | | | | | | | This patch fixes two memory errors: 1. During a probe failure (in mtd_device_parse_register?) the command buffer would not be freed. 2. The command buffer's size is determined based on the 'fast_read' boolean, but the assignment of fast_read is made after this allocation. Thus, the buffer may be allocated "too small". To fix the first, just switch to the devres version of kzalloc. To fix the second, increase MAX_CMD_SIZE unconditionally. It's not worth saving a byte to fiddle around with the conditions here. This problem was reported by Yuhang Wang a while back. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reported-by: Yuhang Wang <wangyuhang2014@gmail.com> Reviewed-by: Sourav Poddar <sourav.poddar@ti.com> Cc: <stable@vger.kernel.org>
* mtd: Move major number definitions to major.hEzequiel Garcia2013-11-071-0/+1
| | | | | | | | | This patch moves the char and block major number definitions to major.h to be with the rest of the major numbers. While doing this, include major.h in the files that need it. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: m25p80: Add support for Micron N25Q512A memoryPriyanka Jain2013-11-071-0/+1
| | | | | | | | | | | | Micron N25Q512A is a spi flash memory with following features: -64MB size, 1.8V, Mulitple I/O, 4KB Sector erase memory. -Memory is organised as 1024(64KB) main sectors. -Each sector is divided into 256 pages. -Register set/Opcodes are similar to other N25Q family products. Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtg: docg3: use free_bch() instead of kfree()Wei Yongjun2013-11-071-1/+1
| | | | | | | | | Use free_bch() instead of kfree() to free init_bch() allocated data. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: sst25l: Use devm_kzallocSachin Kamat2013-11-071-9/+3
| | | | | | | devm_kzalloc is device managed and makes code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: sst25l: Remove redundant spi_set_drvdataSachin Kamat2013-11-071-1/+0
| | | | | | | | Driver core will set the driver data to NULL upon detach or probe failure. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: phram: Make phram 64-bit compatibleAlexander Sverdlin2013-11-071-33/+33
| | | | | | | | | | | | phram was 32-bit limited by design. Machines are growing up, but phram module is still useful. Update it. The patch is bigger than minimum, because simple_strtoul() is obsolete. Tested on MIPS64 and compile-tested for PPC (32 bit). Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nsn.com> Reviewed-by: Joern Engel <joern@logfs.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: m25p80: Add support for ESMT F25L32PAFlavio Silveira2013-10-281-0/+3
| | | | | | | | | | | | | This flashchip is used in D-Link DIR-610 A1 router board and maybe several others, yet is not kernel upstream. So add support for it according to datasheet [0], making it easier to support other boards using this flashchip in the future. [0] http://www.esmt.com.tw/DB/manager/upload/F25L32PA.pdf Signed-off-by: Flavio Silveira <fggs@terra.com.br> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
* mtd: dataflash: remove unused fieldBrian Norris2013-10-281-2/+0
| | | | | | | struct dataflash's 'partition' field is unused. Just remove it. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: David Brownell <david-b@pacbell.net>
* mtd: m25p80: Fix 4 byte addressing mode for Micron devices.Elie De Brauwer2013-09-271-2/+15
| | | | | | | | | | | | | | | | | | | | | | | | According to the datasheet for Micron n25q256a (N25Q256A13ESF40F) 4-byte addressing mode should be entered as follows: <quote> To enter or exit the 4-byte address mode, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. (Note: The WRITE ENABLE command must NOT be executed on the N25Q256A83ESF40x and N25Q256A83E1240x devices.) S# must be driven LOW. The effect of the command is immediate; after the command has been executed, the write enable latch bit is cleared to 0. </quote> Micron's portable way to perform this for all types of Micron flash is to first issue a write enable, then switch the addressing mode followed by a write disable to avoid leaving the flash in a write- able state. Signed-off-by: Elie De Brauwer <eliedebrauwer@email.com> [Brian: reworked a bit] Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: chips: Add support for PMC SPI Flash chips in m25p80.cMichel Stempin2013-08-311-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 Kib), Pm25LV010 (1 Mib) and Pm25LQ032 (32 Mib) SPI Flash chips. This patch addresses two generations of PMC SPI Flash chips: - Pm25LV512 and Pm25LV010: these have 4KiB sectors and 32KiB blocks. The 4KiB sector erase uses a non-standard opcode (0xd7). They do not support JEDEC RDID (0x9f), and so they can only be detected by matching their name string with pre-configured platform data. Because of the cascaded acquisitions, the datasheet is no longer available on the current manufacturer's website, although it is still commonly used in some recent wireless routers (<https://forum.openwrt.org/viewtopic.php?pid=186360#p186360>). The only public datasheet available seems to be on GeoCities: <http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf> - Pm25LQ032: a newer generation flash, with 4KiB sectors and 64KiB blocks. It uses the standard erase and JEDEC read-ID opcodes. Manufacturer's datasheet is here: <http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf> This patch is resent in order to take into account both Brian Norris remarks and this upstream patch: commit e534ee4f9ca29fdb38eea4b0c53f2154fbd8c1ee Author: Krzysztof Mazur <krzysiek@podlesie.net> Date: Fri Feb 22 15:51:05 2013 +0100 mtd: m25p80: introduce SST_WRITE flag for SST byte programming Not all SST devices implement the SST byte programming command. Some devices (like SST25VF064C) implement only standard m25p80 page write command. Now SPI flash devices that need sst_write() are explicitly marked with new SST_WRITE flag and the decision to use sst_write() is based on this flag instead of manufacturer id. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Michel Stempin <michel.stempin@wanadoo.fr> [Brian: fixed conflict] Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: writing supportRafał Miłecki2013-08-301-4/+126
| | | | | | | | Tested with BCM4706. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: implement erasing supportRafał Miłecki2013-08-301-2/+41
| | | | | | Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exitLibo Chen2013-08-301-19/+1
| | | | | | | | | convert to module_platform_driver instead of init/exit Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Libo chen <libo.chen@huawei.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: convert kzalloc to avoid invalid accessLibo Chen2013-08-301-12/+4
| | | | | | | | | | | | | | | | mtd is just member of bcm47xxsflash, so we should free bcm47xxsflash not its member. So I use devm_kazlloc instead of kazlloc to avoid it. * Changelog: convert to devm_kzalloc Signed-off-by: Libo chen <libo.chen@huawei.com> Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> [Brian: fixed conflicts] Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: spear_smi: add missing __iomem annotationJingoo Han2013-08-301-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Added missing __iomem annotation in order to fix the following sparse warnings: drivers/mtd/devices/spear_smi.c:566:13: warning: incorrect type in assignment (different address spaces) drivers/mtd/devices/spear_smi.c:566:13: expected void *src drivers/mtd/devices/spear_smi.c:566:13: got void [noderef] <asn:2>* drivers/mtd/devices/spear_smi.c:586:9: warning: incorrect type in argument 2 (different address spaces) drivers/mtd/devices/spear_smi.c:586:9: expected void const volatile [noderef] <asn:2>*<noident> drivers/mtd/devices/spear_smi.c:586:9: got unsigned char [usertype] *<noident> drivers/mtd/devices/spear_smi.c:659:14: warning: incorrect type in assignment (different address spaces) drivers/mtd/devices/spear_smi.c:659:14: expected void *dest drivers/mtd/devices/spear_smi.c:659:14: got void [noderef] <asn:2>* drivers/mtd/devices/spear_smi.c:620:9: warning: incorrect type in argument 1 (different address spaces) drivers/mtd/devices/spear_smi.c:620:9: expected void volatile [noderef] <asn:2>*<noident> drivers/mtd/devices/spear_smi.c:620:9: got void *dest drivers/mtd/devices/spear_smi.c:620:9: warning: incorrect type in argument 1 (different address spaces) drivers/mtd/devices/spear_smi.c:620:9: expected void volatile [noderef] <asn:2>*<noident> drivers/mtd/devices/spear_smi.c:620:9: got void *dest drivers/mtd/devices/spear_smi.c:620:9: warning: incorrect type in argument 1 (different address spaces) drivers/mtd/devices/spear_smi.c:620:9: expected void volatile [noderef] <asn:2>*<noident> drivers/mtd/devices/spear_smi.c:620:9: got void *dest Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: add support for mr25h10Markus Niebel2013-08-301-0/+1
| | | | | | | | | | | This adds support for the Everspin mr25h10 MRAM chip to the m25p80 driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enableSascha Hauer2013-08-301-6/+9
| | | | | | | | | | | | | | | | | | | | | | | This patch adds a flag to struct flash_info indicating that fast_read is not supported. This now gives the following logic when determing whether to enable fastread: If the flash chip does not support fast_read, then disable it. Otherwise: 1) enable fast_read if device node contains m25p,fast-read 2) enable fast_read if forced in Kconfig This makes enabling CONFIG_M25PXX_USE_FAST_READ a safe option since we no longer enable the fast_read option unconditionally. For now fast_read is disabled for the everspin mr25h256 and the catalyst devices. Others may need the flag aswell. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: Pass flags through CAT25_INFO macroSascha Hauer2013-08-301-8/+8
| | | | | | | | | | | The flags may have to be overwritten, so add them to the CAT25_INFO macro. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: remove unnecessary ifdefSascha Hauer2013-08-301-2/+0
| | | | | | | | | | | of_property_read_bool properly compiles away, no need to ifdef this for non DT builds. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: Micron SPI uses Macronix-style 4-byte addressingBrian Norris2013-08-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For SPI NOR flash that are larger than 128Mbit (16MiB), we need 4 bytes of address space to reach the entire flash; however, the original SPI flash protocol used only 3 bytes for the address. So far, the practice for handling this has been either to use new command opcodes that are defined to use 4 bytes for their address, or to use special mode-switching command to configure all traditionally-3-byte-address commands to take 4 bytes instead. Macronix and Spansion developed two incompatible methods for entering/exiting "4-byte address mode." Micron flash uses the Macronix method (OPCODE_{EN4B,EX4B}), not the Spansion method. This patch solves addressing issues on Micron n25q256a and provides the ability to support other future Micron SPI flash >16MiB. Quoting a Micron representative: "Majority of our NOR that needs 4-byte addressing (256Mb or 32MB and higher) enter and exit 4byte through B7h and E9h commands. The N25Q256A7xxx and N25Q512A7xxx parts do not support 4-byte addressing mode via B7h or E9h command." They further clarified that those that don't support the enter/exit opcodes (B7h/E9h) are manufactured specifically to come up by default in 4-byte mode. We don't need to treat those parts any diffently, as they will discard the EN4B opcode as a no-op. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: simplify use of devm_ioremap_resourceJulia Lawall2013-08-301-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove unneeded error handling on the result of a call to platform_get_resource when the value is passed to devm_ioremap_resource. Move the call to platform_get_resource adjacent to the call to devm_ioremap_resource to make the connection between them more clear. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression pdev,res,n,e,e1; expression ret != 0; identifier l; @@ - res = platform_get_resource(pdev, IORESOURCE_MEM, n); ... when != res - if (res == NULL) { ... \(goto l;\|return ret;\) } ... when != res + res = platform_get_resource(pdev, IORESOURCE_MEM, n); e = devm_ioremap_resource(e1, res); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: use dev_get_platdata()Jingoo Han2013-08-303-3/+3
| | | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: diskonchip: remove unused entries in KconfigMichael Opdenacker2013-08-051-55/+0
| | | | | | | | | | | | This patch proposes to remove kernel configuration parameters defined in drivers/mtd/devices/Kconfig, but used nowhere in the makefiles and source code (except in comments). Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: elm: Low power transition supportavinash philip2013-08-051-0/+117
| | | | | | | | | | | | ELM is used for locating bit-flip errors in when using BCH ECC scheme. This patch adds suspend/resume support for leaf level ELM driver, And also provides ELM register context save & restore support, so that configurations are preserved across hardware power-off/on transitions. Signed-off-by: Philip Avinash <avinashphilip@ti.com> Signed-off-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: elm: remove unnecessary platform_set_drvdata()Jingoo Han2013-08-051-1/+0
| | | | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: spear_smi: remove unnecessary platform_set_drvdata()Jingoo Han2013-08-051-4/+1
| | | | | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: Convert logging messagesJoe Perches2013-08-051-27/+31
| | | | | | | | | | | | Use a more current logging style. Convert homegrown ERROR/INFO macros to pr_<level>. Convert homegrown parse_err macros to pr_err and expand hidden flow control. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: added the 16MiB winbond deviceGirish K S2013-08-051-0/+1
| | | | | | | | | Added a 16MiB winbond devce to the device list erase size = 64KiB and number of blocks = 256. Signed-off-by: Girish K S <ks.giri@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: correct EN4B/EX4B commentBrian Norris2013-08-051-1/+1
| | | | | | Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: utilize dedicated 4-byte addressing commandsBrian Norris2013-08-051-7/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Traditionally, the command set used by SPI flash only supported a 3-byte address. However, large SPI flash (>= 32MiB, or 256Mib) require 4 bytes to address the entire flash. Most manufacturers have supplied a mode switch (via a "bank register writer", or a "enable 4-byte mode" command), which tells the flash to expect 4 address cycles from now on, instead of 3. This mode remains until power is cut, the reset line is triggered (on packages where present), or a command is sent to reset the flash or to reset the 3-byte addressing mode. As an alternative, some flash manufacturers have developed a new command set that accept a full 4-byte address. They can be used orthogonally to any of the modes; that is, they can be used when the flash is in either 3-byte or 4-byte address mode. Now, there are a number of reasons why the "stateful" 4-byte address mode switch may not be acceptable. For instance, some SoC's perform a dumb boot sequence in which they only send 3-byte read commands to the flash. However, if an unexpected reset occurs, the flash chip cannot be guaranteed to return to its 3-byte mode. Thus, the SoC controller and flash will not understand each other. (One might consider hooking up the aforementioned reset pin to the system reset line so that any system reset will reset the flash to 3-byte mode, but some packages do not provide this pin. And in some other packages, one must choose between having a reset pin and having enough pins for 4-output QSPI support. It is an error prone process choosing a flash that will support a hardware reset pin!) This patch provides support for the new stateless command set, so that we can avoid the problems that come with a stateful addressing mode change. The flash can be left in "3-byte mode" while still accessing the entire flash. Note that Spansion supports this command set on all its large flash (e.g, S25FL512S), and Macronix has begun supporting this command set on some new flash (e.g., MX25L25635F). For the moment, I don't know how to differentiate the Macronix that don't support this command set (e.g., MX25L25635E) from those that do, so this patch only supports Spansion. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: devices: convert OMAP BCH to devm_ioremap_resource()Silviu-Mihai Popescu2013-08-051-3/+3
| | | | | | | | | Convert all users of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. Signed-off-by: Silviu-Mihai Popescu <silviupopescu1990@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: m25p80: use spi_get_drvdata() and spi_set_drvdata()Jingoo Han2013-08-051-2/+2
| | | | | | | | | | Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: dataflash: use spi_get_drvdata() and spi_set_drvdata()Jingoo Han2013-08-051-4/+4
| | | | | | | | | | Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: sst25l: use spi_get_drvdata() and spi_set_drvdata()Jingoo Han2013-08-051-3/+3
| | | | | | | | | | Use the wrapper functions for getting and setting the driver data using spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we can directly pass a struct spi_device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: spear_smi: add CONFIG_PM_SLEEP to suspend/resume functionsJingoo Han2013-08-051-4/+2
| | | | | | | | | | | | | | | Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following build warning when CONFIG_PM_SLEEP is not selected. This is because sleep PM callbacks defined by SIMPLE_DEV_PM_OPS are only used when the CONFIG_PM_SLEEP is enabled. Also, unnecessary CONFIG_PM ifdefs are removed drivers/mtd/devices/spear_smi.c:1049:12: warning: 'spear_smi_suspend' defined but not used [-Wunused-function] drivers/mtd/devices/spear_smi.c:1059:12: warning: 'spear_smi_resume' defined but not used [-Wunused-function] Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: implement polling chip statusRafał Miłecki2013-08-051-0/+55
| | | | | | Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: implement ChipCommon R/W opsRafał Miłecki2013-08-052-0/+15
| | | | | | | | | | They are needed for erasing/writing. Use a magic pointers and small functions to prepare code for adding other buses support in the future (like SSB). Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: dataflash: Use of_match_ptr() macroSachin Kamat2013-04-051-3/+1
| | | | | | | | | This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: merge mtdchar module with mtdcoreArtem Bityutskiy2013-04-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The MTD subsystem has historically tried to be as configurable as possible. The side-effect of this is that its configuration menu is rather large, and we are gradually shrinking it. For example, we recently merged partitions support with the mtdcore. This patch does the next step - it merges the mtdchar module to mtdcore. And in this case this is not only about eliminating too fine-grained separation and simplifying the configuration menu. This is also about eliminating seemingly useless kernel module. Indeed, mtdchar is a module that allows user-space making use of MTD devices via /dev/mtd* character devices. If users do not enable it, they simply cannot use MTD devices at all. They cannot read or write the flash contents. Is it a sane and useful setup? I believe not. And everyone just enables mtdchar. Having mtdchar separate is also a little bit harmful. People sometimes miss the fact that they need to enable an additional configuration option to have user-space MTD interfaces, and then they wonder why on earth the kernel does not allow using the flash? They spend time asking around. Thus, let's just get rid of this module and make it part of mtd core. Note, mtdchar had additional configuration option to enable OTP interfaces, which are present on some flashes. I removed that option as well - it saves a really tiny amount space. [dwmw2: Strictly speaking, you can mount file systems on MTD devices just fine without the mtdchar (or mtdblock) devices; you just can't do other manipulations directly on the underlying device. But still I agree that it makes sense to make this unconditional. And Yay! we get to kill off an instance of checking CONFIG_foo_MODULE, which is an abomination that should never happen.] Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: doc: use module_platform_driver_probe()Jingoo Han2013-04-051-12/+1
| | | | | | | | | This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: define opcodesRafał Miłecki2013-04-051-0/+48
| | | | | | | | | | | We need them to add erase/write support. This may duplicate some defines with bcma and/or ssb code, but it makes more sense to keep that in bcm47xxsflash which is supposed to work with both buses. Duplicated defines will be removed from ssb/bcma. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* mtd: bcm47xxsflash: store info about flash typeRafał Miłecki2013-04-052-0/+16
| | | | | | | | | It's going to be needed for erase and write operations, they differ between Atmel and ST flashes. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 12:43:48 +0100