fb: add support for Raspberry Pi 2 and 3
Co-Authored-By: Benjamin Dauphin <benjamin.dauphin@live.fr> Co-Authored-By: Gilles Henaux <gill.henaux@gmail.com>
This commit is contained in:
Jean-Baptiste Boric
@@ -4,4 +4,10 @@
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HERE=${.CURDIR}/arch/${MACHINE_ARCH}
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.PATH: ${HERE}
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SRCS += fb_arch.c
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.if ${BSP_NAME} == omap
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SRCS= fb_arch_omap.c
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.elif ${BSP_NAME} == rpi
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SRCS= fb_arch_rpi.c
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.else
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.error Unknown bsp ${BSP_NAME}
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.endif
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337
minix/drivers/video/fb/arch/earm/fb_arch_rpi.c
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337
minix/drivers/video/fb/arch/earm/fb_arch_rpi.c
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@@ -0,0 +1,337 @@
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/* Architecture dependent part for the framebuffer on the OMAP3.
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* There's obvious room for improvement.
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*/
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#include <minix/chardriver.h>
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#include <minix/drivers.h>
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#include <minix/fb.h>
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#include <minix/type.h>
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#include <minix/vm.h>
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#include <minix/log.h>
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#include <assert.h>
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#include <sys/mman.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <dev/videomode/videomode.h>
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#include <dev/videomode/edidvar.h>
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#include <dev/videomode/edidreg.h>
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#include "dss.h"
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#include "fb.h"
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/* default / fallback resolution if EDID reading fails */
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#define SCREEN_WIDTH 640
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#define SCREEN_HEIGHT 480
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#define PAGES_NR 2
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#define NSUPPORTED_MODES (4)
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/* List of valid modes from TRM 7.1
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* Other modes might work (like the default 1024x600), but no guarantees.
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*/
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struct supported_modes {
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int hdisplay;
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int vdisplay;
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} omap_supported_modes[NSUPPORTED_MODES] = {
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{ .hdisplay = 1024, .vdisplay = 768 }, /* XGA */
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{ .hdisplay = 1280, .vdisplay = 800 }, /* WXGA */
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{ .hdisplay = 1400, .vdisplay = 1050 }, /* SXGA+ */
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{ .hdisplay = 1280, .vdisplay = 720 } /* HD 720p */
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};
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/* local function prototypes */
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static struct videomode *choose_mode(struct edid_info *info);
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static void configure_with_defaults(int minor);
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/* globals */
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static vir_bytes mbox_phys_base; /* Address of dss phys memory map */
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static u32_t* mboxbuffer_vir; /* Address of dss phys memory map */
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static phys_bytes mboxbuffer_phys; /* Address of dss phys memory map */
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static vir_bytes fb_vir;
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static phys_bytes fb_phys;
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static size_t fb_size;
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static int initialized = 0;
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#define MAILBOX_BASE 0x3f00b000
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#define MAILBOX0_READ 0x880
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#define MAILBOX0_STATUS 0x898
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#define MAILBOX0_WRITE 0x8a0
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struct panel_config {
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u32_t timing_h;
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u32_t timing_v;
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u32_t pol_freq;
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u32_t divisor;
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u32_t lcd_size;
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u32_t panel_type;
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u32_t data_lines;
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u32_t load_mode;
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u32_t panel_color;
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};
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static const struct fb_fix_screeninfo default_fbfs = {
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.xpanstep = 0,
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.ypanstep = 0,
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.ywrapstep = 0,
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.line_length = SCREEN_WIDTH * 4,
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.mmio_start = 0, /* Not implemented for char. special, so */
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.mmio_len = 0 /* these are set to 0 */
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};
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static struct fb_fix_screeninfo omap_fbfs[FB_DEV_NR];
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static const struct fb_var_screeninfo default_fbvs = {
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.xres = SCREEN_WIDTH,
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.yres = SCREEN_HEIGHT,
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.xres_virtual = SCREEN_WIDTH,
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.yres_virtual = SCREEN_HEIGHT,
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.xoffset = 0,
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.yoffset = 0,
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.bits_per_pixel = 32,
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.red = {
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.offset = 16,
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.length = 8,
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.msb_right = 0
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},
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.green = {
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.offset = 8,
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.length = 8,
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.msb_right = 0
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},
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.blue = {
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.offset = 0,
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.length = 8,
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.msb_right = 0
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},
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.transp = {
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.offset = 24,
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.length = 8,
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.msb_right = 0
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}
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};
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static struct fb_var_screeninfo omap_fbvs[FB_DEV_NR];
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/* logging - use with log_warn(), log_info(), log_debug(), log_trace() */
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static struct log log = {
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.name = "fb",
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.log_level = LEVEL_INFO,
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.log_func = default_log
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};
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static inline u32_t
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readw(vir_bytes addr)
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{
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return *((volatile u32_t *) addr);
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}
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static inline void
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writew(vir_bytes addr, u32_t val)
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{
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*((volatile u32_t *) addr) = val;
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}
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static u32_t readmailbox(unsigned channel)
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{
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u32_t data;
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while (1) {
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while(readw(mbox_phys_base+MAILBOX0_STATUS) & 0x40000000);
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asm volatile("dmb" : : : "memory");
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data = readw(mbox_phys_base+MAILBOX0_READ);
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asm volatile("dmb" : : : "memory");
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if ((data & 15) == channel)
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return data;
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}
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}
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static void writemailbox(unsigned channel, u32_t data)
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{
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while(readw(mbox_phys_base+MAILBOX0_STATUS) & 0x80000000);
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asm volatile("dmb" : : : "memory");
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writew(mbox_phys_base+MAILBOX0_WRITE, data | channel);
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}
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static void
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configure_with_defaults(int minor)
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{
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if (minor < 0 || minor >= FB_DEV_NR) {
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log_warn(&log, "Invalid minor #%d\n", minor);
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return;
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}
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/* copy the default values into this minor's configuration */
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memcpy(&omap_fbfs[minor], &default_fbfs, sizeof(struct fb_fix_screeninfo));
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memcpy(&omap_fbvs[minor], &default_fbvs, sizeof(struct fb_var_screeninfo));
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}
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static void
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arch_configure_display(int minor)
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{
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/* Tell hardware where frame buffer is and turn display on */
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u32_t off, rdispc;
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struct minix_mem_range mr;
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if (!initialized) return;
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if (minor != 0) return;
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/* Fill mailbox property tags buffer */
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mboxbuffer_vir[0] = 4096;
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mboxbuffer_vir[1] = 0;
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mboxbuffer_vir[2] = 0x00048003; /* set physical size */
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mboxbuffer_vir[3] = 8;
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mboxbuffer_vir[4] = 0;
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mboxbuffer_vir[5] = omap_fbvs[0].xres_virtual;
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mboxbuffer_vir[6] = omap_fbvs[0].yres_virtual;
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mboxbuffer_vir[7] = 0x00048004; /* set virtual size */
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mboxbuffer_vir[8] = 8;
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mboxbuffer_vir[9] = 0;
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mboxbuffer_vir[10] = omap_fbvs[0].xres_virtual;
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mboxbuffer_vir[11] = omap_fbvs[0].yres_virtual;
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mboxbuffer_vir[12] = 0x00048005; /* set depth */
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mboxbuffer_vir[13] = 4;
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mboxbuffer_vir[14] = 0;
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mboxbuffer_vir[15] = omap_fbvs[0].bits_per_pixel;
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mboxbuffer_vir[16] = 0x00040001; /* allocate framebuffer */
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mboxbuffer_vir[17] = 8;
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mboxbuffer_vir[18] = 0;
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mboxbuffer_vir[19] = 4096;
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mboxbuffer_vir[20] = 0; /* end tag */
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writemailbox(8, mboxbuffer_phys + 0x40000000);
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readmailbox(8);
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if (mboxbuffer_vir[1] != 0x80000000)
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panic("Unable to configure framebuffer");
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int c = 2;
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while (mboxbuffer_vir[c] != 0x40001)
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c += 3 + (mboxbuffer_vir[c+1] >> 2);
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if (mboxbuffer_vir[c+2] != 0x80000008)
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panic("Unrecognized response from mailbox");
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/* Configure framebuffer memory access */
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mboxbuffer_vir[c+3] &= ~0xC0000000;
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mr.mr_base = mboxbuffer_vir[c+3];
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mr.mr_limit = mboxbuffer_vir[c+3] + mboxbuffer_vir[c+4];
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if (sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr) != OK) {
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panic("Unable to request access to framebuffer memory");
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}
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fb_size = mr.mr_limit-mr.mr_base;
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fb_vir = (vir_bytes) vm_map_phys(SELF, (void *) mr.mr_base, fb_size);
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if (fb_vir == (vir_bytes) MAP_FAILED) {
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panic("Unable to map framebuffer memory");
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}
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}
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int
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arch_get_device(int minor, struct device *dev)
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{
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if (!initialized) return ENXIO;
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if (minor != 0) return ENXIO;
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dev->dv_base = fb_vir;
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dev->dv_size = fb_size;
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return OK;
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}
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int
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arch_get_varscreeninfo(int minor, struct fb_var_screeninfo *fbvsp)
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{
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if (!initialized) return ENXIO;
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if (minor != 0) return ENXIO;
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*fbvsp = omap_fbvs[minor];
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return OK;
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}
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int
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arch_put_varscreeninfo(int minor, struct fb_var_screeninfo *fbvsp)
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{
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int r = OK;
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assert(fbvsp != NULL);
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if (!initialized) return ENXIO;
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if (minor != 0) return ENXIO;
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/* For now we only allow to play with the yoffset setting */
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if (fbvsp->yoffset != omap_fbvs[minor].yoffset) {
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if (/* fbvsp->yoffset < 0 || */ fbvsp->yoffset > omap_fbvs[minor].yres) {
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return EINVAL;
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}
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omap_fbvs[minor].yoffset = fbvsp->yoffset;
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}
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/* Now update hardware with new settings */
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arch_configure_display(minor);
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return OK;
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}
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int
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arch_get_fixscreeninfo(int minor, struct fb_fix_screeninfo *fbfsp)
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{
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if (!initialized) return ENXIO;
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if (minor != 0) return ENXIO;
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*fbfsp = omap_fbfs[minor];
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return OK;
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}
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int
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arch_pan_display(int minor, struct fb_var_screeninfo *fbvsp)
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{
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return arch_put_varscreeninfo(minor, fbvsp);
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}
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int
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arch_fb_init(int minor, struct edid_info *info)
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{
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int r;
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u32_t rdispc;
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struct minix_mem_range mr;
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if (minor != 0) return ENXIO; /* We support only one minor */
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if (initialized) {
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return OK;
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} else {
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log_debug(&log, "Loading Default Settings...\n");
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configure_with_defaults(minor);
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}
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initialized = 1;
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/* Configure mailbox memory access */
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mr.mr_base = MAILBOX_BASE;
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mr.mr_limit = mr.mr_base + 0x1000;
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if (sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mr) != OK) {
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panic("Unable to request access to mailbox memory");
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}
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mbox_phys_base = (vir_bytes) vm_map_phys(SELF, (void *) MAILBOX_BASE,
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0x1000);
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if (mbox_phys_base == (vir_bytes) MAP_FAILED) {
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panic("Unable to map mailbox memory");
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}
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/* Configure mailbox buffer */
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mboxbuffer_vir = (u32_t*) alloc_contig(0x1000, 0, &mboxbuffer_phys);
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if (mboxbuffer_vir == (u32_t*) MAP_FAILED) {
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panic("Unable to allocate contiguous memory for mailbox buffer\n");
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}
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/* Configure buffer settings and turn on LCD/Digital */
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arch_configure_display(minor);
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return OK;
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}
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