| /* |
| * Copyright 2016 Google Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but without any warranty; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <stdint.h> |
| |
| #include "base/cleanup.h" |
| #include "base/container_of.h" |
| #include "base/io.h" |
| #include "base/xalloc.h" |
| #include "drivers/framebuffer/tegra132.h" |
| |
| enum { |
| WinEnable = 1 << 30, |
| }; |
| |
| static int tegra132_framebuffer_prepare(FrameBufferOps *me, FrameBuffer *buf) |
| { |
| Tegra132Framebuffer *fb = container_of(me, Tegra132Framebuffer, ops); |
| |
| int ret = framebuffer_read_from_fwdb(buf); |
| if (ret) |
| return ret; |
| |
| if (!fb->initialized) { |
| // Set the framebuffer address and enable the T window. |
| write32((uint32_t *)fb->winbuf_t_start_addr, |
| (uintptr_t)buf->buffer); |
| write32((uint32_t *)fb->win_t_win_options, |
| read32((uint32_t *)fb->win_t_win_options) | WinEnable); |
| |
| cleanup_add(&fb->cleanup); |
| fb->initialized = 1; |
| } |
| |
| return 0; |
| } |
| |
| int tegra132_framebuffer_disable(Tegra132Framebuffer *fb) |
| { |
| // Disable the T Window. |
| write32((uint32_t *)fb->win_t_win_options, |
| read32((uint32_t *)fb->win_t_win_options) & ~WinEnable); |
| |
| fb->initialized = 0; |
| return 0; |
| } |
| |
| static int tegra132_framebuffer_cleanup(DcEvent *me) |
| { |
| Tegra132Framebuffer *fb = |
| container_of(me, Tegra132Framebuffer, cleanup.event); |
| |
| return tegra132_framebuffer_disable(fb); |
| } |
| |
| Tegra132Framebuffer *new_tegra132_framebuffer(uintptr_t winbuf_t_start_addr, |
| uintptr_t win_t_win_options) |
| { |
| Tegra132Framebuffer *fb = xzalloc(sizeof(*fb)); |
| |
| fb->ops.prepare = &tegra132_framebuffer_prepare; |
| |
| fb->cleanup.types = CleanupOnHandoff | CleanupOnLegacy; |
| fb->cleanup.event.trigger = &tegra132_framebuffer_cleanup; |
| |
| fb->winbuf_t_start_addr = winbuf_t_start_addr; |
| fb->win_t_win_options = win_t_win_options; |
| |
| return fb; |
| } |