Revision tags: v3.17-rc4, v3.17-rc3, v3.17-rc2 |
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#
3d705d14 |
| 19-Aug-2014 |
Sascha Hauer <s.hauer@pengutronix.de> |
mmc: implement Driver Stage Register handling Some eMMC and SD cards implement a DSR register that allows to tune raise/fall times and drive strength of the CMD and DATA outputs. The
mmc: implement Driver Stage Register handling Some eMMC and SD cards implement a DSR register that allows to tune raise/fall times and drive strength of the CMD and DATA outputs. The values to use depend on the card in use and the host. It might be needed to reduce the drive strength to prevent voltage peaks above the host's specification. Implement a 'dsr' devicetree property that allows to specify the value to set the DSR to. For non-dt setups the new members of mmc_host can be set by board code. This patch was initially authored by Sascha Hauer. It contains improvements authored by Markus Niebel and Uwe Kleine-König. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Revision tags: v3.17-rc1, v3.16, v3.16-rc7, v3.16-rc6, v3.16-rc5, v3.16-rc4, v3.16-rc3, v3.16-rc2, v3.16-rc1, v3.15, v3.15-rc8, v3.15-rc7, v3.15-rc6, v3.15-rc5, v3.15-rc4, v3.15-rc3, v3.15-rc2, v3.15-rc1, v3.14, v3.14-rc8, v3.14-rc7, v3.14-rc6, v3.14-rc5, v3.14-rc4, v3.14-rc3, v3.14-rc2, v3.14-rc1 |
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#
b9ec2616 |
| 28-Jan-2014 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Fixup busy detection for mmc switch operations If the host controller supports busy detection in HW, we expect the MMC_CAP_WAIT_WHILE_BUSY to be set. Likewise the correspondin
mmc: core: Fixup busy detection for mmc switch operations If the host controller supports busy detection in HW, we expect the MMC_CAP_WAIT_WHILE_BUSY to be set. Likewise the corresponding host->max_busy_timeout should reflect the maximum busy detection timeout supported by the host. Previously we expected a host that supported MMC_CAP_WAIT_WHILE_BUSY to cope with any timeout, which just isn't feasible due to HW limitations. For most switch operations, R1B responses are expected and thus we need to check for busy detection completion. To cope with cases where the requested busy detection timeout is greater than what the host are able to support, we fallback to use a R1 response instead. This will prevent the host from doing HW busy detection. In those cases, busy detection completion is handled by polling the for the card's status using CMD13. This is the same mechanism used when the host doesn't support MMC_CAP_WAIT_WHILE_BUSY. Do note, a host->max_busy_timeout set to zero, is interpreted by the mmc core as it don't know what the host supports. It will then provide the host with whatever timeout the mmc core finds suitable. For some cases the mmc core has unfurtunate no clue of what timeout to use. In these cases we provide the host with a timeout value of zero, which the host may interpret as use whatever timeout it finds suitable. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
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#
636bd13c |
| 28-Jan-2014 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Minor simplifications to __mmc_switch Instead of using several references to card->host, let's use a local variable. That means we can remove the BUG_ON verifications for the
mmc: core: Minor simplifications to __mmc_switch Instead of using several references to card->host, let's use a local variable. That means we can remove the BUG_ON verifications for the same pointers. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
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4509f8477 |
| 08-Jan-2014 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Add ignore_crc flag to __mmc_switch Instead of handle specific adaptations, releated to certain switch operations, inside __mmc_switch, push this to be handled by the caller
mmc: core: Add ignore_crc flag to __mmc_switch Instead of handle specific adaptations, releated to certain switch operations, inside __mmc_switch, push this to be handled by the caller instead. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
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1d4d7744 |
| 08-Jan-2014 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Rename cmd_timeout_ms to busy_timeout To better reflect that the cmd_timeout_ms is directly related to the busy detection timeout, let's rename it. Signed-off-by: Ulf
mmc: core: Rename cmd_timeout_ms to busy_timeout To better reflect that the cmd_timeout_ms is directly related to the busy detection timeout, let's rename it. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
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Revision tags: v3.13-rc7, v3.13-rc6, v3.13-rc5, v3.13-rc4, v3.13-rc3, v3.13-rc2, v3.13-rc1, v3.12 |
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#
ecd3a7da |
| 27-Oct-2013 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Silence compiler warning in __mmc_switch Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.12-rc7, v3.12-rc6, v3.12-rc5, v3.12-rc4, v3.12-rc3, v3.12-rc2, v3.12-rc1 |
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#
878e200b |
| 09-Sep-2013 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Do not poll for busy with status cmd for all switch cmds Some switch operations like poweroff notify, shall according to the spec not be followed by any other new commands. Fo
mmc: core: Do not poll for busy with status cmd for all switch cmds Some switch operations like poweroff notify, shall according to the spec not be followed by any other new commands. For these cases and when the host does'nt support MMC_CAP_WAIT_WHILE_BUSY, we must not send status commands to poll for busy detection. Instead wait for the stated timeout from the EXT_CSD before completing the request. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Cc: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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#
a27fbf2f |
| 04-Sep-2013 |
Seungwon Jeon <tgih.jun@samsung.com> |
mmc: add ignorance case for CMD13 CRC error While speed mode is changed, CMD13 cannot be guaranteed. According to the spec., it is not recommended to use CMD13 to check the busy comp
mmc: add ignorance case for CMD13 CRC error While speed mode is changed, CMD13 cannot be guaranteed. According to the spec., it is not recommended to use CMD13 to check the busy completion of the timing change. If CMD13 is used in this case, CRC error must be ignored. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.11, v3.11-rc7 |
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#
84532e33 |
| 24-Aug-2013 |
Minjian Wu <minjianwu@micron.com> |
mmc: core: Set data timeout for mmc bus test commands (CMD14 and CMD19). Signed-off-by: Minjian Wu <minjianwu@micron.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by
mmc: core: Set data timeout for mmc bus test commands (CMD14 and CMD19). Signed-off-by: Minjian Wu <minjianwu@micron.com> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.11-rc6, v3.11-rc5, v3.11-rc4, v3.11-rc3, v3.11-rc2, v3.11-rc1, v3.10, v3.10-rc7, v3.10-rc6, v3.10-rc5, v3.10-rc4, v3.10-rc3, v3.10-rc2, v3.10-rc1, v3.9, v3.9-rc8 |
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#
07a68216 |
| 19-Apr-2013 |
Ulf Hansson <ulf.hansson@linaro.org> |
mmc: core: Restructure and simplify code for mmc sleep|awake The mmc_card_sleep|awake APIs are not being used since the support is already properly encapsulated within the suspend sequen
mmc: core: Restructure and simplify code for mmc sleep|awake The mmc_card_sleep|awake APIs are not being used since the support is already properly encapsulated within the suspend sequence. Sleep|awake command is also specific for eMMC. We remove the sleep|awake bus_ops, the mmc_card_sleep|awake APIs and move the code into the mmc specific core instead. This also includes the mmc ops function, mmc_sleepawake. All releated functions have then become static and we have got far less code to maintain. Additionally this patch also simplifies the code from mmc_sleepawake, since it is only used to put the card to sleep and not awake. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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#
775a9362 |
| 18-Apr-2013 |
Maya Erez <merez@codeaurora.org> |
mmc: card: Adding support for sanitize in eMMC 4.5 The sanitize support is added as a user-app ioctl call, and was removed from the block-device request, since its purpose is to be i
mmc: card: Adding support for sanitize in eMMC 4.5 The sanitize support is added as a user-app ioctl call, and was removed from the block-device request, since its purpose is to be invoked not via File-System but by a user. This feature deletes the unmap memory region of the eMMC card, by writing to a specific register in the EXT_CSD. unmap region is the memory region that was previously deleted (by erase, trim or discard operation). In order to avoid timeout when sanitizing large-scale cards, the timeout for sanitize operation is 240 seconds. Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.9-rc7, v3.9-rc6, v3.9-rc5, v3.9-rc4, v3.9-rc3, v3.9-rc2, v3.9-rc1, v3.8, v3.8-rc7 |
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#
ce39f9d1 |
| 06-Feb-2013 |
Seungwon Jeon <tgih.jun@samsung.com> |
mmc: support packed write command for eMMC4.5 devices This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the in
mmc: support packed write command for eMMC4.5 devices This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Large amounts of data in one transfer rather than several data of small size are effective for eMMC write internally. As a result, packed command help write throughput be improved. The following tables show the results of packed write. Type A: test none | packed iozone 25.8 | 31 tiotest 27.6 | 31.2 lmdd 31.2 | 35.4 Type B: test none | packed iozone 44.1 | 51.1 tiotest 47.9 | 52.5 lmdd 51.6 | 59.2 Type C: test none | packed iozone 19.5 | 32 tiotest 19.9 | 34.5 lmdd 22.8 | 40.7 Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.8-rc6, v3.8-rc5, v3.8-rc4, v3.8-rc3, v3.8-rc2, v3.8-rc1, v3.7, v3.7-rc8, v3.7-rc7, v3.7-rc6 |
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#
8fee476b |
| 16-Nov-2012 |
Trey Ramsay <tramsay@linux.vnet.ibm.com> |
mmc: core: Fix some driver hangs when dealing with broken devices There are infinite loops in the mmc code that can be caused by bad hardware. The code will loop forever if the device n
mmc: core: Fix some driver hangs when dealing with broken devices There are infinite loops in the mmc code that can be caused by bad hardware. The code will loop forever if the device never comes back from program mode, R1_STATE_PRG, and it is not ready for data, R1_READY_FOR_DATA. A long timeout is added to prevent the code from looping forever. The timeout will occur if the device never comes back from program state or the device never becomes ready for data. It's not clear whether the timeout will do more than log a pr_err() and then start a fresh hang all over again. We may need to extend this patch later to perform some kind of reset of the device (is that possible?) or rejection of new I/O to the device. Signed-off-by: Trey Ramsay <tramsay@linux.vnet.ibm.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.7-rc5, v3.7-rc4, v3.7-rc3, v3.7-rc2, v3.7-rc1, v3.6, v3.6-rc7 |
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#
950d56ac |
| 17-Sep-2012 |
Jaehoon Chung <jh80.chung@samsung.com> |
mmc: support BKOPS feature for eMMC Enable eMMC background operations (BKOPS) feature. If URGENT_BKOPS is set after a response, note that BKOPS are required. Immediately run BKO
mmc: support BKOPS feature for eMMC Enable eMMC background operations (BKOPS) feature. If URGENT_BKOPS is set after a response, note that BKOPS are required. Immediately run BKOPS if required. Read/write operations should be requested during BKOPS(LEVEL-1), then issue HPI to interrupt the ongoing BKOPS and service the foreground operation. (This patch only controls the LEVEL2/3.) When repeating the writing 1GB data, at a certain time, performance is decreased. At that time, card triggers the Level-3 or Level-2. After running bkops, performance is recovered. Future considerations: * Check BKOPS_LEVEL=1 and start BKOPS in a preventive manner. * Interrupt ongoing BKOPS before powering off the card. * How do we get BKOPS_STATUS value (periodically send ext_csd command)? * If using periodic bkops, also consider runtime_pm control. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org> Reviewed-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.6-rc6, v3.6-rc5, v3.6-rc4, v3.6-rc3, v3.6-rc2 |
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#
1a41313e |
| 02-Aug-2012 |
Kyungsik Lee <kyungsik.lee@lge.com> |
mmc: core: Remove bounce buffer in mmc_send_cxd_data() It is expected that Extended CSD register (the size of this register is larger than CID/CSD) will be referenced more frequently as
mmc: core: Remove bounce buffer in mmc_send_cxd_data() It is expected that Extended CSD register (the size of this register is larger than CID/CSD) will be referenced more frequently as more fields have been added to Extended CSD and it seems that it is not a good option to double the memory used. This patch is intended to avoid the use of bounce buffer for reading Extended CSD register in mmc_send_cxd_data(). It will provide a better performance gain by removing memcpy() overhead for a half KiB and a redundant bounce buffer allocated repeatedly at the cost of providing DMA-capable buffer from upper caller (but on-stack buffer is allowed with no performance gain). Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com> Reviewed-by: Venkatraman S <svenkatr@ti.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.6-rc1, v3.5, v3.5-rc7, v3.5-rc6, v3.5-rc5, v3.5-rc4 |
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#
6af9e96e |
| 22-Jun-2012 |
Venkatraman S <svenkatr@ti.com> |
mmc: core: Fix the HPI execution sequence mmc_execute_hpi should send the HPI command only once, and only if the card is in PRG state. According to eMMC spec, the command's comp
mmc: core: Fix the HPI execution sequence mmc_execute_hpi should send the HPI command only once, and only if the card is in PRG state. According to eMMC spec, the command's completion time is not dependent on OUT_OF_INTERRUPT_TIME. Only the transition out of PRG STATE is guarded by OUT_OF_INTERRUPT_TIME - which is defined to begin at the end of sending the command itself. Specify the default timeout for the actual sending of HPI command, and then use OUT_OF_INTERRUPT_TIME to wait for the transition out of PRG state. Reported-by: Alex Lemberg <Alex.Lemberg@sandisk.com> Signed-off-by: Venkatraman S <svenkatr@ti.com> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.5-rc3, v3.5-rc2, v3.5-rc1, v3.4, v3.4-rc7, v3.4-rc6, v3.4-rc5, v3.4-rc4, v3.4-rc3, v3.4-rc2, v3.4-rc1, v3.3 |
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#
2378975b |
| 11-Mar-2012 |
Jaehoon Chung <jh80.chung@samsung.com> |
mmc: core: warn when card doesn't support HPI Someone could use send_hpi_cmd() on a card that doesn't advertise support for HPI. Then maybe didn't work fine. Because card->ext_csd.hpi_
mmc: core: warn when card doesn't support HPI Someone could use send_hpi_cmd() on a card that doesn't advertise support for HPI. Then maybe didn't work fine. Because card->ext_csd.hpi_cmd didn't set. So if card didn't support hpi, return the warning message. And CMD12's flags is MMC_RSP_R1B. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.3-rc7, v3.3-rc6, v3.3-rc5, v3.3-rc4, v3.3-rc3, v3.3-rc2, v3.3-rc1, v3.2, v3.2-rc7, v3.2-rc6, v3.2-rc5, v3.2-rc4, v3.2-rc3, v3.2-rc2, v3.2-rc1, v3.1, v3.1-rc10, v3.1-rc9, v3.1-rc8, v3.1-rc7, v3.1-rc6, v3.1-rc5, v3.1-rc4, v3.1-rc3, v3.1-rc2, v3.1-rc1, v3.0, v3.0-rc7 |
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#
3ef77af1 |
| 10-Jul-2011 |
Paul Gortmaker <paul.gortmaker@windriver.com> |
mmc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required These two basic defines were everywhere, simply because module.h was also everywhere. But we are cleaning up the latter. So
mmc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required These two basic defines were everywhere, simply because module.h was also everywhere. But we are cleaning up the latter. So make the exporters actually call out their need for the include. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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#
eb0d8f13 |
| 18-Oct-2011 |
Jaehoon Chung <jh80.chung@samsung.com> |
mmc: core: support HPI send command HPI command is defined in eMMC4.41. This feature is important for eMMC4.5 devices. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
mmc: core: support HPI send command HPI command is defined in eMMC4.41. This feature is important for eMMC4.5 devices. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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#
a3c76eb9 |
| 11-Oct-2011 |
Girish K S <girish.shivananjappa@linaro.org> |
mmc: replace printk with appropriate display macro All the files using printk function for displaying kernel messages in the mmc driver have been replaced with corresponding macro.
mmc: replace printk with appropriate display macro All the files using printk function for displaying kernel messages in the mmc driver have been replaced with corresponding macro. Signed-off-by: Girish K S <girish.shivananjappa@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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#
ad5fd972 |
| 24-Aug-2011 |
Venkatraman S <svenkatr@ti.com> |
mmc: fix integer assignments to pointer Fix the sparse warning output "warning: Using plain integer as NULL pointer" Signed-off-by: Venkatraman S <svenkatr@ti.com> Signed-off-by
mmc: fix integer assignments to pointer Fix the sparse warning output "warning: Using plain integer as NULL pointer" Signed-off-by: Venkatraman S <svenkatr@ti.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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#
7435bb79 |
| 10-Aug-2011 |
Jaehoon Chung <jh80.chung@samsung.com> |
mmc: core: use defined R1_STATE_PRG macro for card status Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by
mmc: core: use defined R1_STATE_PRG macro for card status Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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Revision tags: v3.0-rc6, v3.0-rc5, v3.0-rc4, v3.0-rc3, v3.0-rc2, v3.0-rc1, v2.6.39, v2.6.39-rc7, v2.6.39-rc6, v2.6.39-rc5, v2.6.39-rc4 |
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#
24f5b53b |
| 13-Apr-2011 |
Chris Ball <cjb@laptop.org> |
mmc: initialize struct mmc_request at declaration time Converts from: struct mmc_request mrq; memset(&mrq, 0, sizeof(struct mmc_request)); to: st
mmc: initialize struct mmc_request at declaration time Converts from: struct mmc_request mrq; memset(&mrq, 0, sizeof(struct mmc_request)); to: struct mmc_request mrq = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball <cjb@laptop.org>
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#
a61ad2b4 |
| 13-Apr-2011 |
Chris Ball <cjb@laptop.org> |
mmc: initialize struct mmc_data at declaration time Converts from: struct mmc_data data; memset(&data, 0, sizeof(struct mmc_data)); to: struct mm
mmc: initialize struct mmc_data at declaration time Converts from: struct mmc_data data; memset(&data, 0, sizeof(struct mmc_data)); to: struct mmc_data data = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball <cjb@laptop.org>
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#
1278dba1 |
| 13-Apr-2011 |
Chris Ball <cjb@laptop.org> |
mmc: initialize struct mmc_command at declaration time Converts from: struct mmc_command cmd; memset(&cmd, 0, sizeof(struct mmc_command)); to: st
mmc: initialize struct mmc_command at declaration time Converts from: struct mmc_command cmd; memset(&cmd, 0, sizeof(struct mmc_command)); to: struct mmc_command cmd = {0}; because it's shorter, as performant, and easier to work out whether initialization has happened. Signed-off-by: Chris Ball <cjb@laptop.org>
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