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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c
new file mode 100644
index 000000000..8bd1d442e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm200.c
@@ -0,0 +1,188 @@
+/*
+ * 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 gm200_i2c_aux(p) container_of((p), struct gm200_i2c_aux, base)
+#include "aux.h"
+
+struct gm200_i2c_aux {
+ struct nvkm_i2c_aux base;
+ int ch;
+};
+
+static void
+gm200_i2c_aux_fini(struct gm200_i2c_aux *aux)
+{
+ struct nvkm_device *device = aux->base.pad->i2c->subdev.device;
+ nvkm_mask(device, 0x00d954 + (aux->ch * 0x50), 0x00710000, 0x00000000);
+}
+
+static int
+gm200_i2c_aux_init(struct gm200_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 & 0x07010000);
+
+ /* set some magic, and wait up to 1ms for it to appear */
+ nvkm_mask(device, 0x00d954 + (aux->ch * 0x50), 0x00700000, ureq);
+ timeout = 1000;
+ do {
+ ctrl = nvkm_rd32(device, 0x00d954 + (aux->ch * 0x50));
+ udelay(1);
+ if (!timeout--) {
+ AUX_ERR(&aux->base, "magic wait %08x", ctrl);
+ gm200_i2c_aux_fini(aux);
+ return -EBUSY;
+ }
+ } while ((ctrl & 0x07000000) != urep);
+
+ return 0;
+}
+
+static int
+gm200_i2c_aux_xfer(struct nvkm_i2c_aux *obj, bool retry,
+ u8 type, u32 addr, u8 *data, u8 *size)
+{
+ struct gm200_i2c_aux *aux = gm200_i2c_aux(obj);
+ struct nvkm_i2c *i2c = aux->base.pad->i2c;
+ struct nvkm_device *device = i2c->subdev.device;
+ const u32 base = aux->ch * 0x50;
+ u32 ctrl, stat, timeout, retries = 0;
+ u32 xbuf[4] = {};
+ int ret, i;
+
+ AUX_TRACE(&aux->base, "%d: %08x %d", type, addr, *size);
+
+ ret = gm200_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;
+ }
+
+ nvkm_i2c_aux_autodpcd(i2c, aux->ch, false);
+
+ 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 &= ~0x0001f1ff;
+ ctrl |= type << 12;
+ ctrl |= (*size ? (*size - 1) : 0x00000100);
+ nvkm_wr32(device, 0x00d950 + base, addr);
+
+ /* (maybe) retry transaction a number of times on failure... */
+ do {
+ /* 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 2ms for it to complete */
+ nvkm_wr32(device, 0x00d954 + base, 0x00010000 | ctrl);
+
+ timeout = 2000;
+ do {
+ ctrl = nvkm_rd32(device, 0x00d954 + base);
+ udelay(1);
+ if (!timeout--) {
+ AUX_ERR(&aux->base, "timeout %08x", ctrl);
+ ret = -EIO;
+ goto out_err;
+ }
+ } while (ctrl & 0x00010000);
+ ret = 0;
+
+ /* read status, and check if transaction completed ok */
+ stat = nvkm_mask(device, 0x00d958 + base, 0, 0);
+ if ((stat & 0x000f0000) == 0x00080000 ||
+ (stat & 0x000f0000) == 0x00020000)
+ ret = 1;
+ if ((stat & 0x00000100))
+ ret = -ETIMEDOUT;
+ if ((stat & 0x00000e00))
+ ret = -EIO;
+
+ AUX_TRACE(&aux->base, "%02d %08x %08x", retries, ctrl, stat);
+ } while (ret && retry && retries++ < 32);
+
+ 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);
+ *size = stat & 0x0000001f;
+ }
+
+out_err:
+ nvkm_i2c_aux_autodpcd(i2c, aux->ch, true);
+out:
+ gm200_i2c_aux_fini(aux);
+ return ret < 0 ? ret : (stat & 0x000f0000) >> 16;
+}
+
+static const struct nvkm_i2c_aux_func
+gm200_i2c_aux_func = {
+ .address_only = true,
+ .xfer = gm200_i2c_aux_xfer,
+};
+
+int
+gm200_i2c_aux_new(struct nvkm_i2c_pad *pad, int index, u8 drive,
+ struct nvkm_i2c_aux **paux)
+{
+ struct gm200_i2c_aux *aux;
+
+ if (!(aux = kzalloc(sizeof(*aux), GFP_KERNEL)))
+ return -ENOMEM;
+ *paux = &aux->base;
+
+ nvkm_i2c_aux_ctor(&gm200_i2c_aux_func, pad, index, &aux->base);
+ aux->ch = drive;
+ aux->base.intr = 1 << aux->ch;
+ return 0;
+}