diff options
Diffstat (limited to 'platform/bcm28xx/mailbox.c')
| -rw-r--r-- | platform/bcm28xx/mailbox.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/platform/bcm28xx/mailbox.c b/platform/bcm28xx/mailbox.c deleted file mode 100644 index d0db1ba5..00000000 --- a/platform/bcm28xx/mailbox.c +++ /dev/null @@ -1,171 +0,0 @@ -/* - * Copyright (c) 2017 Eric Holland - * 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 AUTHORS OR COPYRIGHT HOLDERS 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. - */ - -#include <reg.h> -#include <err.h> -#include <debug.h> -#include <trace.h> - -#include <arch.h> -#include <platform.h> -#include <arch/ops.h> -#include <kernel/vm.h> -#include <dev/display.h> - -#include <platform/bcm28xx.h> -#include <platform/mailbox.h> - - -static volatile uint32_t* mailbox_regs = (uint32_t*)ARM0_MAILBOX_BASE; -static fb_mbox_t fb_desc __ALIGNED(16); - -static inline void* vc_bus_to_kvaddr(uint32_t bus_addr) { - return (paddr_to_kvaddr(bus_addr & 0x3fffffff)); -} - -static inline uint32_t kvaddr_to_vc_bus(addr_t kvaddr) { - return (uint32_t)((kvaddr & 0x3fffffff)+BCM_SDRAM_BUS_ADDR_BASE); -} - -#define MAILBOX_WAIT_TIMEOUT_US 500000 -#define MAILBOX_MAX_READ_ATTEMPTS 20 - -static status_t mailbox_write(const enum mailbox_channel ch, uint32_t value) { - value = value | ch; - - lk_time_t now = current_time(); - - // Wait for there to be space in the FIFO. - while (mailbox_regs[MAILBOX_STATUS] & MAILBOX_FULL) { - if ( (now + MAILBOX_WAIT_TIMEOUT_US) < current_time()) { - return ERR_TIMED_OUT; - } - } - - // Write the value to the mailbox. - mailbox_regs[MAILBOX_WRITE] = value; - - return NO_ERROR; -} - -static status_t mailbox_read(enum mailbox_channel ch, uint32_t* result) { - uint32_t local_result = 0; - uint32_t attempts = 0; - - lk_time_t deadline; - - do { - deadline = current_time() + MAILBOX_WAIT_TIMEOUT_US; - while (mailbox_regs[MAILBOX_STATUS] & MAILBOX_EMPTY) { - if (current_time() > deadline) - return ERR_TIMED_OUT; - } - - local_result = mailbox_regs[MAILBOX_READ]; - - attempts++; - - } while ((((local_result)&0xF) != ch) && (attempts < MAILBOX_MAX_READ_ATTEMPTS)); - - *result = (local_result); - - return attempts < MAX_MAILBOX_READ_ATTEMPTS ? NO_ERROR : ERR_IO; -} - - -static status_t mailbox_get_framebuffer(fb_mbox_t* fb_desc) { - status_t ret = NO_ERROR; - - arch_clean_cache_range((addr_t)fb_desc,sizeof(fb_mbox_t)); - - ret = mailbox_write(ch_framebuffer, kvaddr_to_vc_bus((addr_t)fb_desc)); - if (ret != NO_ERROR) - return ret; - - uint32_t ack = 0x0; - ret = mailbox_read(ch_framebuffer, &ack); - if (ret != NO_ERROR) - return ret; - - arch_invalidate_cache_range((addr_t)fb_desc,sizeof(fb_mbox_t)); - - return ret; -} - -status_t init_framebuffer(void) { - - fb_desc.phys_width = 800; - fb_desc.phys_height = 480; - fb_desc.virt_width = 800; - fb_desc.virt_height = 480; - fb_desc.pitch = 0; - fb_desc.depth = 32; - fb_desc.virt_x_offs = 0; - fb_desc.virt_y_offs = 0; - fb_desc.fb_p = 0; - fb_desc.fb_size = 0; - - status_t ret = mailbox_get_framebuffer(&fb_desc); - - return ret; -} - -void dispflush(void) { - - //arch_clean_cache_range(fb_desc,sizeof(fb_mbox_t)); - -} - -/* LK display (lib/gfx.h) calls this function */ -status_t display_get_framebuffer(struct display_framebuffer *fb) -{ - // VideoCore returns 32-bit bus address, which needs to be converted to kernel virtual - fb->image.pixels = paddr_to_kvaddr(fb_desc.fb_p & 0x3fffffff); - - fb->format = DISPLAY_FORMAT_ARGB_8888; - fb->image.format = IMAGE_FORMAT_ARGB_8888; - fb->image.rowbytes = fb_desc.phys_width * fb_desc.depth/8; - - fb->image.width = fb_desc.phys_width; - fb->image.height = fb_desc.phys_height; - fb->image.stride = fb_desc.phys_width; - fb->flush = NULL; - - return NO_ERROR; -} - -status_t display_get_info(struct display_info *info) -{ - info->format = DISPLAY_FORMAT_ARGB_8888; - info->width = fb_desc.phys_width; - info->height = fb_desc.phys_height; - - return NO_ERROR; -} - -status_t display_present(struct display_image *image, uint starty, uint endy) -{ - return NO_ERROR; -} - - - |