These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / 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 (file)
index 0000000..8db8399
--- /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 <bskeggs@redhat.com>
+ */
+#define nv50_i2c_bus(p) container_of((p), struct nv50_i2c_bus, base)
+#include "bus.h"
+
+#include <subdev/vga.h>
+
+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;
+}