diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
commit | d635711daa98be86d4c7fd01499c34f566b54ccb (patch) | |
tree | aa5cc3760a27c3d57146498cb82fa549547de06c /drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c | |
parent | c91265cd0efb83778f015b4d4b1129bd2cfd075e (diff) |
Linux-libre 4.6.2-gnu
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c deleted file mode 100644 index bed231b56..000000000 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * 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 gm204_i2c_aux(p) container_of((p), struct gm204_i2c_aux, base) -#include "aux.h" - -struct gm204_i2c_aux { - struct nvkm_i2c_aux base; - int ch; -}; - -static void -gm204_i2c_aux_fini(struct gm204_i2c_aux *aux) -{ - struct nvkm_device *device = aux->base.pad->i2c->subdev.device; - nvkm_mask(device, 0x00d954 + (aux->ch * 0x50), 0x00310000, 0x00000000); -} - -static int -gm204_i2c_aux_init(struct gm204_i2c_aux *aux) -{ - struct nvkm_device *device = aux->base.pad->i2c->subdev.device; - const u32 unksel = 1; /* nfi which to use, or if it matters.. */ - const u32 ureq = unksel ? 0x00100000 : 0x00200000; - const u32 urep = unksel ? 0x01000000 : 0x02000000; - u32 ctrl, timeout; - - /* wait up to 1ms for any previous transaction to be done... */ - timeout = 1000; - do { - ctrl = nvkm_rd32(device, 0x00d954 + (aux->ch * 0x50)); - udelay(1); - if (!timeout--) { - AUX_ERR(&aux->base, "begin idle timeout %08x", ctrl); - return -EBUSY; - } - } while (ctrl & 0x03010000); - - /* set some magic, and wait up to 1ms for it to appear */ - nvkm_mask(device, 0x00d954 + (aux->ch * 0x50), 0x00300000, ureq); - timeout = 1000; - do { - ctrl = nvkm_rd32(device, 0x00d954 + (aux->ch * 0x50)); - udelay(1); - if (!timeout--) { - AUX_ERR(&aux->base, "magic wait %08x", ctrl); - gm204_i2c_aux_fini(aux); - return -EBUSY; - } - } while ((ctrl & 0x03000000) != urep); - - return 0; -} - -static int -gm204_i2c_aux_xfer(struct nvkm_i2c_aux *obj, bool retry, - u8 type, u32 addr, u8 *data, u8 size) -{ - struct gm204_i2c_aux *aux = gm204_i2c_aux(obj); - struct nvkm_device *device = aux->base.pad->i2c->subdev.device; - const u32 base = aux->ch * 0x50; - u32 ctrl, stat, timeout, retries; - u32 xbuf[4] = {}; - int ret, i; - - AUX_TRACE(&aux->base, "%d: %08x %d", type, addr, size); - - ret = gm204_i2c_aux_init(aux); - if (ret < 0) - goto out; - - stat = nvkm_rd32(device, 0x00d958 + base); - if (!(stat & 0x10000000)) { - AUX_TRACE(&aux->base, "sink not detected"); - ret = -ENXIO; - goto out; - } - - if (!(type & 1)) { - memcpy(xbuf, data, size); - for (i = 0; i < 16; i += 4) { - AUX_TRACE(&aux->base, "wr %08x", xbuf[i / 4]); - nvkm_wr32(device, 0x00d930 + base + i, xbuf[i / 4]); - } - } - - ctrl = nvkm_rd32(device, 0x00d954 + base); - ctrl &= ~0x0001f0ff; - ctrl |= type << 12; - ctrl |= size - 1; - nvkm_wr32(device, 0x00d950 + base, addr); - - /* (maybe) retry transaction a number of times on failure... */ - for (retries = 0; !ret && retries < 32; retries++) { - /* reset, and delay a while if this is a retry */ - nvkm_wr32(device, 0x00d954 + base, 0x80000000 | ctrl); - nvkm_wr32(device, 0x00d954 + base, 0x00000000 | ctrl); - if (retries) - udelay(400); - - /* transaction request, wait up to 1ms for it to complete */ - nvkm_wr32(device, 0x00d954 + base, 0x00010000 | ctrl); - - timeout = 1000; - do { - ctrl = nvkm_rd32(device, 0x00d954 + base); - udelay(1); - if (!timeout--) { - AUX_ERR(&aux->base, "timeout %08x", ctrl); - ret = -EIO; - goto out; - } - } while (ctrl & 0x00010000); - ret = 1; - - /* read status, and check if transaction completed ok */ - stat = nvkm_mask(device, 0x00d958 + base, 0, 0); - if ((stat & 0x000f0000) == 0x00080000 || - (stat & 0x000f0000) == 0x00020000) - ret = retry ? 0 : 1; - if ((stat & 0x00000100)) - ret = -ETIMEDOUT; - if ((stat & 0x00000e00)) - ret = -EIO; - - AUX_TRACE(&aux->base, "%02d %08x %08x", retries, ctrl, stat); - } - - if (type & 1) { - for (i = 0; i < 16; i += 4) { - xbuf[i / 4] = nvkm_rd32(device, 0x00d940 + base + i); - AUX_TRACE(&aux->base, "rd %08x", xbuf[i / 4]); - } - memcpy(data, xbuf, size); - } - -out: - gm204_i2c_aux_fini(aux); - return ret < 0 ? ret : (stat & 0x000f0000) >> 16; -} - -static const struct nvkm_i2c_aux_func -gm204_i2c_aux_func = { - .xfer = gm204_i2c_aux_xfer, -}; - -int -gm204_i2c_aux_new(struct nvkm_i2c_pad *pad, int index, u8 drive, - struct nvkm_i2c_aux **paux) -{ - struct gm204_i2c_aux *aux; - - if (!(aux = kzalloc(sizeof(*aux), GFP_KERNEL))) - return -ENOMEM; - *paux = &aux->base; - - nvkm_i2c_aux_ctor(&gm204_i2c_aux_func, pad, index, &aux->base); - aux->ch = drive; - aux->base.intr = 1 << aux->ch; - return 0; -} |