diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/nv4e.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/i2c/nv4e.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/nv4e.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/nv4e.c new file mode 100644 index 000000000000..046fe5e2ea19 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/nv4e.c @@ -0,0 +1,120 @@ +/* + * Copyright 2012 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" + +#include <subdev/vga.h> + +struct nv4e_i2c_priv { + struct nvkm_i2c base; +}; + +struct nv4e_i2c_port { + struct nvkm_i2c_port base; + u32 addr; +}; + +static void +nv4e_i2c_drive_scl(struct nvkm_i2c_port *base, int state) +{ + struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base); + struct nv4e_i2c_port *port = (void *)base; + nv_mask(priv, port->addr, 0x2f, state ? 0x21 : 0x01); +} + +static void +nv4e_i2c_drive_sda(struct nvkm_i2c_port *base, int state) +{ + struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base); + struct nv4e_i2c_port *port = (void *)base; + nv_mask(priv, port->addr, 0x1f, state ? 0x11 : 0x01); +} + +static int +nv4e_i2c_sense_scl(struct nvkm_i2c_port *base) +{ + struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base); + struct nv4e_i2c_port *port = (void *)base; + return !!(nv_rd32(priv, port->addr) & 0x00040000); +} + +static int +nv4e_i2c_sense_sda(struct nvkm_i2c_port *base) +{ + struct nv4e_i2c_priv *priv = (void *)nvkm_i2c(base); + struct nv4e_i2c_port *port = (void *)base; + return !!(nv_rd32(priv, port->addr) & 0x00080000); +} + +static const struct nvkm_i2c_func +nv4e_i2c_func = { + .drive_scl = nv4e_i2c_drive_scl, + .drive_sda = nv4e_i2c_drive_sda, + .sense_scl = nv4e_i2c_sense_scl, + .sense_sda = nv4e_i2c_sense_sda, +}; + +static int +nv4e_i2c_port_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 index, + struct nvkm_object **pobject) +{ + struct dcb_i2c_entry *info = data; + struct nv4e_i2c_port *port; + int ret; + + ret = nvkm_i2c_port_create(parent, engine, oclass, index, + &nvkm_i2c_bit_algo, &nv4e_i2c_func, &port); + *pobject = nv_object(port); + if (ret) + return ret; + + port->addr = 0x600800 + info->drive; + return 0; +} + +static struct nvkm_oclass +nv4e_i2c_sclass[] = { + { .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NV4E_BIT), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = nv4e_i2c_port_ctor, + .dtor = _nvkm_i2c_port_dtor, + .init = _nvkm_i2c_port_init, + .fini = _nvkm_i2c_port_fini, + }, + }, + {} +}; + +struct nvkm_oclass * +nv4e_i2c_oclass = &(struct nvkm_i2c_impl) { + .base.handle = NV_SUBDEV(I2C, 0x4e), + .base.ofuncs = &(struct nvkm_ofuncs) { + .ctor = _nvkm_i2c_ctor, + .dtor = _nvkm_i2c_dtor, + .init = _nvkm_i2c_init, + .fini = _nvkm_i2c_fini, + }, + .sclass = nv4e_i2c_sclass, + .pad_x = &nv04_i2c_pad_oclass, +}.base; |