--- /dev/null
+/*
+ * 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 <subdev/bios.h>
+#include <subdev/bios/dcb.h>
+#include <subdev/bios/gpio.h>
+#include <subdev/bios/xpio.h>
+
+u16
+dcb_gpio_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+ u16 data = 0x0000;
+ u16 dcb = dcb_table(bios, ver, hdr, cnt, len);
+ if (dcb) {
+ if (*ver >= 0x30 && *hdr >= 0x0c)
+ data = nv_ro16(bios, dcb + 0x0a);
+ else
+ if (*ver >= 0x22 && nv_ro08(bios, dcb - 1) >= 0x13)
+ data = nv_ro16(bios, dcb - 0x0f);
+
+ if (data) {
+ *ver = nv_ro08(bios, data + 0x00);
+ if (*ver < 0x30) {
+ *hdr = 3;
+ *cnt = nv_ro08(bios, data + 0x02);
+ *len = nv_ro08(bios, data + 0x01);
+ } else
+ if (*ver <= 0x41) {
+ *hdr = nv_ro08(bios, data + 0x01);
+ *cnt = nv_ro08(bios, data + 0x02);
+ *len = nv_ro08(bios, data + 0x03);
+ } else {
+ data = 0x0000;
+ }
+ }
+ }
+ return data;
+}
+
+u16
+dcb_gpio_entry(struct nvkm_bios *bios, int idx, int ent, u8 *ver, u8 *len)
+{
+ u8 hdr, cnt, xver; /* use gpio version for xpio entry parsing */
+ u16 gpio;
+
+ if (!idx--)
+ gpio = dcb_gpio_table(bios, ver, &hdr, &cnt, len);
+ else
+ gpio = dcb_xpio_table(bios, idx, &xver, &hdr, &cnt, len);
+
+ if (gpio && ent < cnt)
+ return gpio + hdr + (ent * *len);
+
+ return 0x0000;
+}
+
+u16
+dcb_gpio_parse(struct nvkm_bios *bios, int idx, int ent, u8 *ver, u8 *len,
+ struct dcb_gpio_func *gpio)
+{
+ u16 data = dcb_gpio_entry(bios, idx, ent, ver, len);
+ if (data) {
+ if (*ver < 0x40) {
+ u16 info = nv_ro16(bios, data);
+ *gpio = (struct dcb_gpio_func) {
+ .line = (info & 0x001f) >> 0,
+ .func = (info & 0x07e0) >> 5,
+ .log[0] = (info & 0x1800) >> 11,
+ .log[1] = (info & 0x6000) >> 13,
+ .param = !!(info & 0x8000),
+ };
+ } else
+ if (*ver < 0x41) {
+ u32 info = nv_ro32(bios, data);
+ *gpio = (struct dcb_gpio_func) {
+ .line = (info & 0x0000001f) >> 0,
+ .func = (info & 0x0000ff00) >> 8,
+ .log[0] = (info & 0x18000000) >> 27,
+ .log[1] = (info & 0x60000000) >> 29,
+ .param = !!(info & 0x80000000),
+ };
+ } else {
+ u32 info = nv_ro32(bios, data + 0);
+ u8 info1 = nv_ro32(bios, data + 4);
+ *gpio = (struct dcb_gpio_func) {
+ .line = (info & 0x0000003f) >> 0,
+ .func = (info & 0x0000ff00) >> 8,
+ .log[0] = (info1 & 0x30) >> 4,
+ .log[1] = (info1 & 0xc0) >> 6,
+ .param = !!(info & 0x80000000),
+ };
+ }
+ }
+
+ return data;
+}
+
+u16
+dcb_gpio_match(struct nvkm_bios *bios, int idx, u8 func, u8 line,
+ u8 *ver, u8 *len, struct dcb_gpio_func *gpio)
+{
+ u8 hdr, cnt, i = 0;
+ u16 data;
+
+ while ((data = dcb_gpio_parse(bios, idx, i++, ver, len, gpio))) {
+ if ((line == 0xff || line == gpio->line) &&
+ (func == 0xff || func == gpio->func))
+ return data;
+ }
+
+ /* DCB 2.2, fixed TVDAC GPIO data */
+ if ((data = dcb_table(bios, ver, &hdr, &cnt, len))) {
+ if (*ver >= 0x22 && *ver < 0x30 && func == DCB_GPIO_TVDAC0) {
+ u8 conf = nv_ro08(bios, data - 5);
+ u8 addr = nv_ro08(bios, data - 4);
+ if (conf & 0x01) {
+ *gpio = (struct dcb_gpio_func) {
+ .func = DCB_GPIO_TVDAC0,
+ .line = addr >> 4,
+ .log[0] = !!(conf & 0x02),
+ .log[1] = !(conf & 0x02),
+ };
+ *ver = 0x00;
+ return data;
+ }
+ }
+ }
+
+ return 0x0000;
+}
Code Review / kvmfornfv.git / blobdiff