- 01 Jul, 2015 5 commits
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Viresh Kumar authored
Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by:
Alex Elder <elder@linaro.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@google.com>
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Bryan O'Donoghue authored
The greybus UART protocol specification was updated to reduce the size of the control field in serial-state-request and line-state-request. This patch updates the kernel protocol driver to reflect the specification changes. Once applied gbsim changes will be also be updated automatically since gbsim depends on the header being modified directly. Signed-off-by:
Bryan O'Donoghue <bryan.odonoghue@linaro.org> Signed-off-by:
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Bryan O'Donoghue authored
After reviewing the UART specification for greybus break, parity, framing and over-run errors were moved to the receive-data message. This patch implements that specification change in the UART protocol driver. Matching code in gbsim has been tested with this change. Signed-off-by:
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Bryan O'Donoghue authored
Parity/overrun/framing and break signals have been moved to the receive-data message to more easily associate the signals with the TTY API. Update the definitions in the protocol header and add a flags field to the receive-data structure to facilitate transmission of those signal with the receive-data message. Signed-off-by:
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Viresh Kumar authored
There are new protocols defined which don't belong to any existing class, add more classes to support them. Reported-by:
Alexandre Bailon <abailon@baylibre.com> Signed-off-by:
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- 30 Jun, 2015 4 commits
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Phong Tran authored
The mmc request should assigned before use. Then It should avoid freeing before using in mmc_request_done(). Signed-off-by:
Phong Tran <tranmanphong@gmail.com> Reviewed-by:
Rui Miguel Silva <rui.silva@linaro.org> Reviewed-by:
Mark Greer <mgreer@animalcreek.com> Signed-off-by:
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Phong Tran authored
The mmc host should be removed frist. Then it will be freed. Signed-off-by:
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Phong Tran authored
The macro of sdio version major and minor is defined twice. This patch remove the redundant one. Signed-off-by:
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Mark Greer authored
The current audio code uses i2c_get_adapter() without checking that a non-NULL pointer is returned (i.e., that the i2c device actually exists). When that happens, the system panics. Fix the potential panic by erroring out with -ENODEV when i2c_get_adapter() returns NULL. CC: John Stultz <john.stultz@linaro.com> Signed-off-by:
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- 25 Jun, 2015 3 commits
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Johan Hovold authored
We must be prepared to receive hotplug events as soon as we submit the SVC URB. Since commit 2eb8a6a947d7 ("core: don't set up endo until host device is initialized") this is no longer the case as the endo would not have been setup, something which may lead to a null-pointer dereference in endo_get_module_id() when the interface is created (see oops below with an added dev_dbg for hd->endo). Fix this by setting up the endo before submitting the SVC URB. [ 28.810610] gb_interface_create - hd->endo = (null) [ 28.816020] Unable to handle kernel NULL pointer dereference at virtual address 0000022b [ 28.824952] pgd = c0004000 [ 28.827880] [0000022b] *pgd=00000000 [ 28.831913] Internal error: Oops: 17 [#1] PREEMPT ARM [ 28.837183] Modules linked in: gb_es1(O+) greybus(O) netconsole [ 28.843419] CPU: 0 PID: 21 Comm: kworker/u2:1 Tainted: G O 4.1.0-rc7 #12 [ 28.851576] Hardware name: Generic AM33XX (Flattened Device Tree) [ 28.857978] Workqueue: greybus_ap ap_process_event [greybus] [ 28.863890] task: cf2961c0 ti: cf29c000 task.ti: cf29c000 [ 28.869529] PC is at endo_get_module_id+0x18/0x88 [greybus] [ 28.875355] LR is at gb_interface_add+0x88/0x204 [greybus] [ 28.881070] pc : [<bf0052d4>] lr : [<bf005dac>] psr: 20070013 [ 28.881070] sp : cf29de08 ip : cf29de18 fp : cf29de14 [ 28.893021] r10: 00000001 r9 : 0000005a r8 : cd813ec6 [ 28.898461] r7 : 00000058 r6 : cf7fa200 r5 : 00000001 r4 : cf7fa20c [ 28.905261] r3 : 00000000 r2 : cf2961c0 r1 : 00000001 r0 : 00000000 [ 28.912067] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 28.919677] Control: 10c5387d Table: 8f508019 DAC: 00000015 [ 28.925663] Process kworker/u2:1 (pid: 21, stack limit = 0xcf29c210) [ 28.932279] Stack: (0xcf29de08 to 0xcf29e000) [ 28.936823] de00: cf29de44 cf29de18 bf005dac bf0052c8 00000058 cd813ec0 [ 28.945349] de20: cf58b60c bf00afe0 cf7fa200 cf58b600 0000005a 00000001 cf29de84 cf29de48 [ 28.953865] de40: bf004844 bf005d30 00000000 cf02d800 cf29de6c cf29de60 c00759a0 cf58b60c [ 28.962389] de60: cf2742c0 cf02d800 cf0c6000 cf29dea8 c07b745c 00000000 cf29dee4 cf29de88 [ 28.970908] de80: c005943c bf004560 00000001 00000000 c0059354 cf02d800 c0059c0c 00000001 [ 28.979426] dea0: 00000000 00000000 bf00b314 00000000 00000000 bf009144 c04e3710 cf02d800 [ 28.987945] dec0: cf2742d8 cf02d830 00000088 c0059bd0 00000000 cf2742c0 cf29df24 cf29dee8 [ 28.996464] dee0: c0059b78 c0059248 cf29c000 cf245d40 c0776890 c07b6bf3 00000000 00000000 [ 29.004983] df00: cf245d40 cf2742c0 c0059b20 00000000 00000000 00000000 cf29dfac cf29df28 [ 29.013502] df20: c005fe90 c0059b2c c07812d0 00000000 cf29df4c cf2742c0 00000000 00000001 [ 29.022025] df40: dead4ead ffffffff ffffffff c07c86b0 00000000 00000000 c05fd8e8 cf29df5c [ 29.030542] df60: cf29df5c 00000000 00000001 dead4ead ffffffff ffffffff c07c86b0 00000000 [ 29.039062] df80: 00000000 c05fd8e8 cf29df88 cf29df88 cf245d40 c005fd98 00000000 00000000 [ 29.047581] dfa0: 00000000 cf29dfb0 c00108f8 c005fda4 00000000 00000000 00000000 00000000 [ 29.056105] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 29.064623] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 ffff0000 ffff0000 [ 29.073178] [<bf0052d4>] (endo_get_module_id [greybus]) from [<bf005dac>] (gb_interface_add+0x88/0x204 [greybus]) [ 29.083887] [<bf005dac>] (gb_interface_add [greybus]) from [<bf004844>] (ap_process_event+0x2f0/0x4d8 [greybus]) [ 29.094527] [<bf004844>] (ap_process_event [greybus]) from [<c005943c>] (process_one_work+0x200/0x8e4) [ 29.104228] [<c005943c>] (process_one_work) from [<c0059b78>] (worker_thread+0x58/0x500) [ 29.112668] [<c0059b78>] (worker_thread) from [<c005fe90>] (kthread+0xf8/0x110) [ 29.120295] [<c005fe90>] (kthread) from [<c00108f8>] (ret_from_fork+0x14/0x3c) [ 29.127825] Code: e24cb004 e52de004 e8bd4000 e3510000 (e5d0c22b) [ 29.137481] ---[ end trace ad95c3c26bdc98ce ]--- Signed-off-by:Johan Hovold <johan@hovoldconsulting.com> Signed-off-by:
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Rui Miguel Silva authored
For older kernel, < 3.11, no copy to/from buffer with skip support was defined. This could break builds for this versions of kernel. Add them here. Signed-off-by:
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Rui Miguel Silva authored
Some of the options for mmc host, are not defined in older kernels. MMC_CAP2_HS400_1_2V, MMC_CAP2_HS400_1_8V, MMC_TIMING_MMC_DDR52 and MMC_TIMING_MMC_HS400. To not use them for older versions. Signed-off-by:
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- 24 Jun, 2015 8 commits
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Viresh Kumar authored
It is possible that (by mistake) the manifest contains non-control cports with their protocol set as control-protocol or non-control bundle with their class set as control-class. Catch such cases, WARN for them and finally ignore them. Also WARN if the control cport doesn't have its protocol as control-protocol and control bundle doesn't have its class as control-class. Reviewed-by:
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Viresh Kumar authored
The AP needs to send connected and disconnection events to all interfaces, before a CPort (other than control CPort) can be used. For now do it which we initialize the connection, but it should be moved to operations code later. Reviewed-by:
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Viresh Kumar authored
Manifest is fetched with control protocol now and so we don't need space for it in hotplug data. Reviewed-by:
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Viresh Kumar authored
Control protocol is ready to be used for fetching manifest. Lets do it. This changes few things: - Creates/initializes bundle/connection for control protocol initially and skips doing the same later. - Manifest is parsed at link-up now, instead of hotplug which was the case earlier. This is because we need device_id (provided during link-up) for registering bundle. - Manifest is fetched using control protocol. So the sequence of events is: Event Previously Now ----- ---------- --- Interface Hotplug create intf create intf parse mfst Interface Link Up init bundles create control conn get mfst size get mfst parse mfst init bundles Reviewed-by: -
Viresh Kumar authored
Add control protocol driver that is responsible for handling operations on control CPort. The AP also needs to support incoming requests on its control port. Features not implemented yet are marked as TODO for now. NOTE: This also fixes cport-bundle-id to 0 and cport-id to 2 for control protocol. Reviewed-by:
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Viresh Kumar authored
A connection and a bundle will be created for interfaces at the very beginning for control protocol's functioning. And so the list of bundles and connections for a interface will be non-empty by the time manifest is parsed. Currently we are firing a WARN when these lists are found to be non-empty. Lets fix that to contain single bundle and connection for control protocol. Signed-off-by:
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Rui Miguel Silva authored
Extend sdio implementation, as it for now it was basically stubs. This implementation is compile tested only since there is no fw or simulation support yet. Next step is to add sdio support to gbsim and test it with success using the mmc_test facility. Signed-off-by:
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Rui Miguel Silva authored
Add MMC to the list of options that shall be enable. Signed-off-by:
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- 19 Jun, 2015 1 commit
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Bryan O'Donoghue authored
Greg reported sparse picked up the following warning: /home/gregkh/ara/greybus/uart.c:105:34: warning: cast to restricted __le16 This is due to the control variable in gb_uart_serial_state_request which needs to be declared __le16 not __u16. Signed-off-by:
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- 17 Jun, 2015 2 commits
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Bryan O'Donoghue authored
Latch signals coming from UART module for - GB_UART_CTRL_DCD - GB_UART_CTRL_DSR - GB_UART_CTRL_RI Signed-off-by:
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Greg Kroah-Hartman authored
This reverts commit 698d4bd3e7541a660a3c3665f0af9e787650a239 as Alex says it is broken. Signed-off-by:
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- 15 Jun, 2015 11 commits
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Greg Kroah-Hartman authored
This resolves a conflict with es2.c that I fixed up. Signed-off-by: -
Alexandre Bailon authored
ES2 give us more endpoints. Use them to map one cport to two endpoints (in and out). Because there is more cports than endpoints, we still need to mux other cports traffic on 2 endpoints. Firmware currently assumes these endpoints are 2 and 3. By default, all cports are muxed. To map one cport to 2 endpoints, use map_cport_to_ep(). Signed-off-by:
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Alexandre Bailon authored
ES2 support 16 endpoints. Update es2.c to allocate endpoints, urbs and buffers for these new endpoints. Currently, they are not yet used and es2.c is working in legacy mode (only original endpoints are used). Signed-off-by:
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Alexandre Bailon authored
Instead of keep cport buffers, urbs and endpoints in es1_ap_dev, move them in two dedicated struct (es1_cport_in and es1_cport_out), in order to ease the migration to es2 (increase the number of endpoint). Signed-off-by:
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Alexandre Bailon authored
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Alexandre Bailon authored
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Alex Elder authored
We now limit the maximum value for both host and module CPort ids, and we know they can always be represented in a single byte. Make use of this by using only one of the two pad bytes for encoding the CPort id in a message header. (Note that we have never used a CPort higher than 255. Encoding such a small CPort id in little endian 2-byte format has the same result as what is done here.) Signed-off-by:
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Alex Elder authored
For ES1 and ES2, we use pad bytes in an operation message header to encode the CPort ID used for transferring the message. The pad bytes should otherwise be zero, and we ensure this as the message is passed to or from the upper layer. If host-side CPort ID 0 is used, we have no way of knowing whether the CPort field has been "packed" into the header. To allow detection of this, reserve host CPort id 0. Update cport_id_valid() to treat 0 as invalid. (CPort ID 0 is reserved by one of the UniPro standards. We'll assume for now that we never use it for Greybus.) Signed-off-by:
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Alex Elder authored
We limit the number of host-side CPorts to a fixed maximum (which is less than the 4096 that UniPro allows). This patch imposes a similar limit on the CPort IDs defined by modules (signaling an error if one too large is found in a manifest). It seems reasonable to use the same value for both limits. Change the name of the constant that defines the host limit and use it for both. Update cport_id_valid() to enforce the maximum. (Ultimately we should impose a limit like this; this change is being made in preparation for supporting multiple connections over a single CPort.) Signed-off-by:
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Alex Elder authored
For the ES1 and ES2 host interfaces we encode the CPort ID over which the message should be sent within the message itself. The CPort ID is recorded in unused pad bytes found in the operation message header in order to avoid introducing misaligned messages. This patch defines some helper routines to abstract this activity. Signed-off-by:
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Alex Elder authored
Define a public predicate that defines whether a CPort ID is valid. Use it in the message_send() routine, and make the message reported more accurately reflect the error. Also use it to check whether the CPort ID in a received message is valid; if it is not, just drop the message. Get rid of local variable "buffer" in message_send(); it adds no value. Signed-off-by:
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- 12 Jun, 2015 6 commits
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Alex Elder authored
Currently, if an error occurs creating a bundle, we simply return an error without cleaning up any of the bundles that had already been successfully set up. Add code to destroy bundles that have been created in the event an error occurs. Add a check to ensure the interface's list of bundles was empty before parsing for bundles begins. Signed-off-by:
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Alex Elder authored
Currently gb_bundle_destroy() takes an interface as an argument, and really doesn't do what a function by that name should do. What it now does is delete all bundles associated with a given interface. What it should do is destroy a single bundle. Move the looping logic out of gb_bundle_destroy() and into its caller, gb_interface_destroy(). Pass each bundle in an interface to gb_bundle_destroy(), which will do what's required to destroy a single bundle (including removing it from its interface's bundle list under protection of the lock). Signed-off-by:
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Alex Elder authored
Rearrange gb_bundle_find() so it follows the pattern used by gb_connection_find(). Signed-off-by:
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Alex Elder authored
Currently, if an error occurs creating a connection, we simply return an error without cleaning up any of the connections that had already been successfully set up. Add code to destroy connections that have been created in the event an error occurs. Add a check to ensure the bundle's list of connections was empty before parsing for CPorts begins. Signed-off-by:
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Alex Elder authored
I did this recently for the endo id allocation code. It's clearer now that the allocation of a CPort ID to use for the AP side of a connection is not very complicated, and it happens in a pretty controlled environment. The functions that abstract getting and releasing those ids don't really add that much value. This patch removes gb_connection_hd_cport_id_alloc() and gb_connection_hd_cport_id_free(), and just open-codes their activity in the few places they are called. It is obvious now that the CPort ID allocation isn't done in atomic context, so we can change the ida_simple_get() call to use GFP_KERNEL. Signed-off-by:
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Alex Elder authored
Although a connection records its protocol id when it gets created, its protocol handler doesn't actually get assigned until gb_connection_bind_protocol() is called. In gb_connection_create() there are some error paths in which a reference to the connection's protocol is released before the protocol handler has been associated with the connection. Get rid of those calls. As a result, we will never pass a null protocol pointer to gb_protocol_put(). Add a precautionary warning in that function in the event that ever occurs. Signed-off-by:
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