diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c new file mode 100644 index 000000000..1c18860f8 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c @@ -0,0 +1,113 @@ +/* + * Copyright 2009 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ +#include "priv.h" + +int +nv_rdaux(struct nvkm_i2c_port *port, u32 addr, u8 *data, u8 size) +{ + struct nvkm_i2c *i2c = nvkm_i2c(port); + if (port->func->aux) { + int ret = i2c->acquire(port, 0); + if (ret == 0) { + ret = port->func->aux(port, true, 9, addr, data, size); + i2c->release(port); + } + return ret; + } + return -ENODEV; +} + +int +nv_wraux(struct nvkm_i2c_port *port, u32 addr, u8 *data, u8 size) +{ + struct nvkm_i2c *i2c = nvkm_i2c(port); + if (port->func->aux) { + int ret = i2c->acquire(port, 0); + if (ret == 0) { + ret = port->func->aux(port, true, 8, addr, data, size); + i2c->release(port); + } + return ret; + } + return -ENODEV; +} + +static int +aux_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) +{ + struct nvkm_i2c_port *port = adap->algo_data; + struct nvkm_i2c *i2c = nvkm_i2c(port); + struct i2c_msg *msg = msgs; + int ret, mcnt = num; + + if (!port->func->aux) + return -ENODEV; + + ret = i2c->acquire(port, 0); + if (ret) + return ret; + + while (mcnt--) { + u8 remaining = msg->len; + u8 *ptr = msg->buf; + + while (remaining) { + u8 cnt = (remaining > 16) ? 16 : remaining; + u8 cmd; + + if (msg->flags & I2C_M_RD) + cmd = 1; + else + cmd = 0; + + if (mcnt || remaining > 16) + cmd |= 4; /* MOT */ + + ret = port->func->aux(port, true, cmd, msg->addr, ptr, cnt); + if (ret < 0) { + i2c->release(port); + return ret; + } + + ptr += cnt; + remaining -= cnt; + } + + msg++; + } + + i2c->release(port); + return num; +} + +static u32 +aux_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +const struct i2c_algorithm nvkm_i2c_aux_algo = { + .master_xfer = aux_xfer, + .functionality = aux_func +}; |