/* * Copyright (C) ST-Ericsson AB 2010 * Author: Sjur Brendeland * License terms: GNU General Public License (GPL) version 2 */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ #include #include #include #include #include #define VEI_PAYLOAD 0x00 #define VEI_CMD_BIT 0x80 #define VEI_FLOW_OFF 0x81 #define VEI_FLOW_ON 0x80 #define VEI_SET_PIN 0x82 #define container_obj(layr) container_of(layr, struct cfsrvl, layer) static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt); static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt); struct cflayer *cfvei_create(u8 channel_id, struct dev_info *dev_info) { struct cfsrvl *vei = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC); if (!vei) return NULL; caif_assert(offsetof(struct cfsrvl, layer) == 0); cfsrvl_init(vei, channel_id, dev_info, true); vei->layer.receive = cfvei_receive; vei->layer.transmit = cfvei_transmit; snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ - 1, "vei%d", channel_id); return &vei->layer; } static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt) { u8 cmd; int ret; caif_assert(layr->up != NULL); caif_assert(layr->receive != NULL); caif_assert(layr->ctrlcmd != NULL); if (cfpkt_extr_head(pkt, &cmd, 1) < 0) { pr_err("Packet is erroneous!\n"); cfpkt_destroy(pkt); return -EPROTO; } switch (cmd) { case VEI_PAYLOAD: ret = layr->up->receive(layr->up, pkt); return ret; case VEI_FLOW_OFF: layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0); cfpkt_destroy(pkt); return 0; case VEI_FLOW_ON: layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0); cfpkt_destroy(pkt); return 0; case VEI_SET_PIN: /* SET RS232 PIN */ cfpkt_destroy(pkt); return 0; default: /* SET RS232 PIN */ pr_warn("Unknown VEI control packet %d (0x%x)!\n", cmd, cmd); cfpkt_destroy(pkt); return -EPROTO; } } static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt) { u8 tmp = 0; struct caif_payload_info *info; int ret; struct cfsrvl *service = container_obj(layr); if (!cfsrvl_ready(service, &ret)) goto err; caif_assert(layr->dn != NULL); caif_assert(layr->dn->transmit != NULL); if (cfpkt_add_head(pkt, &tmp, 1) < 0) { pr_err("Packet is erroneous!\n"); ret = -EPROTO; goto err; } /* Add info-> for MUX-layer to route the packet out. */ info = cfpkt_info(pkt); info->channel_id = service->layer.id; info->hdr_len = 1; info->dev_info = &service->dev_info; return layr->dn->transmit(layr->dn, pkt); err: cfpkt_destroy(pkt); return ret; } arch' size='10' name='q' value=''/>
path: root/Documentation/input/gamepad.txt
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-12-09 19:53:05 +0100
committerJonathan Corbet <corbet@lwn.net>2016-12-11 13:37:55 -0700
commit868c97a846a73e937d835b09b8c885a69df50ec8 (patch)
tree9cdc05e799d117ac71b29d0958ee3dc65b8d539d /Documentation/input/gamepad.txt
parent9e22ff439fa2e1201b168c001683f275afd46258 (diff)
dma-buf: Extract dma-buf.rst
Just prep work to polish and consolidate all the dma-buf related documenation. Unfortunately I didn't discover a way to both integrate this new file into the overall toc while keeping it at the current place. Work around that by moving it into the overall driver-api/index.rst. Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/input/gamepad.txt')