From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- .../gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c | 113 +++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c') diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c new file mode 100644 index 000000000..8db839938 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busnv50.c @@ -0,0 +1,113 @@ +/* + * Copyright 2015 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 busions 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 + */ +#define nv50_i2c_bus(p) container_of((p), struct nv50_i2c_bus, base) +#include "bus.h" + +#include + +struct nv50_i2c_bus { + struct nvkm_i2c_bus base; + u32 addr; + u32 data; +}; + +static void +nv50_i2c_bus_drive_scl(struct nvkm_i2c_bus *base, int state) +{ + struct nv50_i2c_bus *bus = nv50_i2c_bus(base); + struct nvkm_device *device = bus->base.pad->i2c->subdev.device; + if (state) bus->data |= 0x01; + else bus->data &= 0xfe; + nvkm_wr32(device, bus->addr, bus->data); +} + +static void +nv50_i2c_bus_drive_sda(struct nvkm_i2c_bus *base, int state) +{ + struct nv50_i2c_bus *bus = nv50_i2c_bus(base); + struct nvkm_device *device = bus->base.pad->i2c->subdev.device; + if (state) bus->data |= 0x02; + else bus->data &= 0xfd; + nvkm_wr32(device, bus->addr, bus->data); +} + +static int +nv50_i2c_bus_sense_scl(struct nvkm_i2c_bus *base) +{ + struct nv50_i2c_bus *bus = nv50_i2c_bus(base); + struct nvkm_device *device = bus->base.pad->i2c->subdev.device; + return !!(nvkm_rd32(device, bus->addr) & 0x00000001); +} + +static int +nv50_i2c_bus_sense_sda(struct nvkm_i2c_bus *base) +{ + struct nv50_i2c_bus *bus = nv50_i2c_bus(base); + struct nvkm_device *device = bus->base.pad->i2c->subdev.device; + return !!(nvkm_rd32(device, bus->addr) & 0x00000002); +} + +static void +nv50_i2c_bus_init(struct nvkm_i2c_bus *base) +{ + struct nv50_i2c_bus *bus = nv50_i2c_bus(base); + struct nvkm_device *device = bus->base.pad->i2c->subdev.device; + nvkm_wr32(device, bus->addr, (bus->data = 0x00000007)); +} + +static const struct nvkm_i2c_bus_func +nv50_i2c_bus_func = { + .init = nv50_i2c_bus_init, + .drive_scl = nv50_i2c_bus_drive_scl, + .drive_sda = nv50_i2c_bus_drive_sda, + .sense_scl = nv50_i2c_bus_sense_scl, + .sense_sda = nv50_i2c_bus_sense_sda, + .xfer = nvkm_i2c_bit_xfer, +}; + +int +nv50_i2c_bus_new(struct nvkm_i2c_pad *pad, int id, u8 drive, + struct nvkm_i2c_bus **pbus) +{ + static const u32 addr[] = { + 0x00e138, 0x00e150, 0x00e168, 0x00e180, + 0x00e254, 0x00e274, 0x00e764, 0x00e780, + 0x00e79c, 0x00e7b8 + }; + struct nv50_i2c_bus *bus; + + if (drive >= ARRAY_SIZE(addr)) { + nvkm_warn(&pad->i2c->subdev, "bus %d unknown\n", drive); + return -ENODEV; + } + + if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL))) + return -ENOMEM; + *pbus = &bus->base; + + nvkm_i2c_bus_ctor(&nv50_i2c_bus_func, pad, id, &bus->base); + bus->addr = addr[drive]; + bus->data = 0x00000007; + return 0; +} -- cgit 1.2.3-korg