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[src/trunk]: src/sys/dev/ic add ssdfb
details: https://anonhg.NetBSD.org/src/rev/f757c195788a
branches: trunk
changeset: 997626:f757c195788a
user: tnn <tnn%NetBSD.org@localhost>
date: Sun Mar 17 00:57:15 2019 +0000
description:
add ssdfb
The ssdfb driver provides wsdisplay(4) support for OLED/PLED framebuffer
modules based on one of the following controller chips:
- Solomon Systech Ltd SSD1306
- Sino Wealth Electronic Ltd SH1106
It supports xf86-video-wsfb and can optionally attach as the console.
Some products that should work with this driver include:
- Adafruit 0.96" 128x64 OLED graphic display
- Adafruit 1.3" 128x64 OLED graphic display
- Adafruit 128x32 OLED graphic display
- Adafruit PiOLED 128x32 Monochome OLED for Raspberry Pi
- "GM009605" commonly distributed with Arduino starter kits
- display modules made by Chengdu Heltec Automation technology co. LTD
Note: I used the name ssdfb(4) because that's what OpenBSD calls their
driver but the implementation is entirely unique to NetBSD.
diffstat:
sys/dev/ic/ssdfb.c | 1001 +++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/ic/ssdfbvar.h | 237 +++++++++++
2 files changed, 1238 insertions(+), 0 deletions(-)
diffs (truncated from 1246 to 300 lines):
diff -r fab056638f29 -r f757c195788a sys/dev/ic/ssdfb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ic/ssdfb.c Sun Mar 17 00:57:15 2019 +0000
@@ -0,0 +1,1001 @@
+/* $NetBSD: ssdfb.c,v 1.1 2019/03/17 00:57:15 tnn Exp $ */
+
+/*
+ * Copyright (c) 2019 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Tobias Nygren.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: ssdfb.c,v 1.1 2019/03/17 00:57:15 tnn Exp $");
+
+#include "opt_ddb.h"
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <uvm/uvm_page.h>
+#include <sys/condvar.h>
+#include <sys/kmem.h>
+#include <sys/kthread.h>
+#include <dev/wscons/wsdisplayvar.h>
+#include <dev/rasops/rasops.h>
+#include <dev/ic/ssdfbvar.h>
+
+#if defined(DDB)
+#include <machine/db_machdep.h>
+#include <ddb/db_extern.h>
+#endif
+
+/* userland interface */
+static int ssdfb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
+static paddr_t ssdfb_mmap(void *, void *, off_t, int);
+
+/* wscons screen management */
+static int ssdfb_alloc_screen(void *, const struct wsscreen_descr *,
+ void **, int *, int *, long *);
+static void ssdfb_free_screen(void *, void *);
+static int ssdfb_show_screen(void *, void *, int,
+ void (*cb) (void *, int, int), void *);
+
+/* rasops hooks */
+static void ssdfb_putchar(void *, int, int, u_int, long);
+static void ssdfb_copycols(void *, int, int, int, int);
+static void ssdfb_erasecols(void *, int, int, int, long);
+static void ssdfb_copyrows(void *, int, int, int);
+static void ssdfb_eraserows(void *, int, int, long);
+static void ssdfb_cursor(void *, int, int, int);
+
+/* hardware interface */
+static int ssdfb_init(struct ssdfb_softc *);
+static int ssdfb_set_contrast(struct ssdfb_softc *, uint8_t, bool);
+static int ssdfb_set_display_on(struct ssdfb_softc *, bool, bool);
+static int ssdfb_set_mode(struct ssdfb_softc *, u_int);
+
+/* frame buffer damage tracking and synchronization */
+static bool ssdfb_is_modified(struct ssdfb_softc *sc);
+static bool ssdfb_clear_modify(struct ssdfb_softc *sc);
+static void ssdfb_damage(struct ssdfb_softc *);
+static void ssdfb_thread(void *);
+static void ssdfb_set_usepoll(struct ssdfb_softc *, bool);
+static int ssdfb_sync(struct ssdfb_softc *, bool);
+static uint64_t ssdfb_transpose_block_1bpp(uint8_t *, size_t);
+static uint64_t ssdfb_transpose_block_8bpp(uint8_t *, size_t);
+
+/* misc helpers */
+static const struct ssdfb_product *
+ ssdfb_lookup_product(ssdfb_product_id_t);
+static int ssdfb_pick_font(int *, struct wsdisplay_font **);
+static void ssdfb_clear_screen(struct ssdfb_softc *);
+#if defined(DDB)
+static void ssdfb_ddb_trap_callback(int);
+#endif
+
+static const char *ssdfb_controller_names[] = {
+ [SSDFB_CONTROLLER_UNKNOWN] = "unknown",
+ [SSDFB_CONTROLLER_SSD1306] = "Solomon Systech SSD1306",
+ [SSDFB_CONTROLLER_SH1106] = "Sino Wealth SH1106"
+};
+
+/*
+ * Display module assemblies supported by this driver.
+ */
+static const struct ssdfb_product ssdfb_products[] = {
+ {
+ .p_product_id = SSDFB_PRODUCT_SSD1306_GENERIC,
+ .p_controller_id = SSDFB_CONTROLLER_SSD1306,
+ .p_name = "generic",
+ .p_width = 128,
+ .p_height = 64,
+ .p_panel_shift = 0,
+ .p_fosc = 0x8,
+ .p_fosc_div = 0,
+ .p_precharge = 0x1,
+ .p_discharge = 0xf,
+ .p_compin_cfg = SSDFB_COM_PINS_A1_MASK
+ | SSDFB_COM_PINS_ALTERNATIVE_MASK,
+ .p_vcomh_deselect_level = SSD1306_VCOMH_DESELECT_LEVEL_0_77_VCC,
+ .p_default_contrast = 0x7f,
+ .p_multiplex_ratio = 0x3f,
+ .p_chargepump_cmd = SSD1306_CMD_SET_CHARGE_PUMP,
+ .p_chargepump_arg = SSD1306_CHARGE_PUMP_ENABLE
+ },
+ {
+ .p_product_id = SSDFB_PRODUCT_SH1106_GENERIC,
+ .p_controller_id = SSDFB_CONTROLLER_SH1106,
+ .p_name = "generic",
+ .p_width = 128,
+ .p_height = 64,
+ .p_panel_shift = 2,
+ .p_fosc = 0x5,
+ .p_fosc_div = 0,
+ .p_precharge = 0x2,
+ .p_discharge = 0x2,
+ .p_compin_cfg = SSDFB_COM_PINS_A1_MASK
+ | SSDFB_COM_PINS_ALTERNATIVE_MASK,
+ .p_vcomh_deselect_level = SH1106_VCOMH_DESELECT_LEVEL_DEFAULT,
+ .p_default_contrast = 0x80,
+ .p_multiplex_ratio = 0x3f,
+ .p_chargepump_cmd = SH1106_CMD_SET_CHARGE_PUMP_7V4,
+ .p_chargepump_arg = SSDFB_CMD_NOP
+ },
+ {
+ .p_product_id = SSDFB_PRODUCT_ADAFRUIT_938,
+ .p_controller_id = SSDFB_CONTROLLER_SSD1306,
+ .p_name = "Adafruit Industries, LLC product 938",
+ .p_width = 128,
+ .p_height = 64,
+ .p_panel_shift = 0,
+ .p_fosc = 0x8,
+ .p_fosc_div = 0,
+ .p_precharge = 0x1,
+ .p_discharge = 0xf,
+ .p_compin_cfg = 0x12,
+ .p_vcomh_deselect_level = 0x40,
+ .p_default_contrast = 0x8f,
+ .p_multiplex_ratio = 0x3f,
+ .p_chargepump_cmd = SSD1306_CMD_SET_CHARGE_PUMP,
+ .p_chargepump_arg = SSD1306_CHARGE_PUMP_ENABLE
+ },
+ {
+ .p_product_id = SSDFB_PRODUCT_ADAFRUIT_931,
+ .p_controller_id = SSDFB_CONTROLLER_SSD1306,
+ .p_name = "Adafruit Industries, LLC product 931",
+ .p_width = 128,
+ .p_height = 32,
+ .p_panel_shift = 0,
+ .p_fosc = 0x8,
+ .p_fosc_div = 0,
+ .p_precharge = 0x1,
+ .p_discharge = 0xf,
+ .p_compin_cfg = 0x2,
+ .p_vcomh_deselect_level = 0x40,
+ .p_default_contrast = 0x8f,
+ .p_multiplex_ratio = 0x1f,
+ .p_chargepump_cmd = SSD1306_CMD_SET_CHARGE_PUMP,
+ .p_chargepump_arg = SSD1306_CHARGE_PUMP_ENABLE
+ }
+};
+
+static const struct wsdisplay_accessops ssdfb_accessops = {
+ .ioctl = ssdfb_ioctl,
+ .mmap = ssdfb_mmap,
+ .alloc_screen = ssdfb_alloc_screen,
+ .free_screen = ssdfb_free_screen,
+ .show_screen = ssdfb_show_screen
+};
+
+#define SSDFB_CMD1(c) do { cmd[0] = (c); error = sc->sc_cmd(sc->sc_cookie, cmd, 1, usepoll); } while(0)
+#define SSDFB_CMD2(c, a) do { cmd[0] = (c); cmd[1] = (a); error = sc->sc_cmd(sc->sc_cookie, cmd, 2, usepoll); } while(0)
+#define SSDFB_CMD3(c, a, b) do { cmd[0] = (c); cmd[1] = (a); cmd[2] = (b); error = sc->sc_cmd(sc->sc_cookie, cmd, 3, usepoll); } while(0)
+
+void
+ssdfb_attach(struct ssdfb_softc *sc, int flags)
+{
+ struct wsemuldisplaydev_attach_args aa;
+ struct rasops_info *ri = &sc->sc_ri;
+ int error = 0;
+ long defattr;
+ const struct ssdfb_product *p;
+
+ p = ssdfb_lookup_product(flags & SSDFB_ATTACH_FLAG_PRODUCT_MASK);
+ if (p == NULL) {
+ aprint_error(": unknown display assembly\n");
+ return;
+ }
+ sc->sc_p = p;
+
+ aprint_naive("\n");
+ aprint_normal(": %s (%s)\n",
+ ssdfb_controller_names[p->p_controller_id],
+ p->p_name);
+
+ sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
+ sc->sc_is_console = flags & SSDFB_ATTACH_FLAG_CONSOLE ? true : false;
+ sc->sc_inverse = flags & SSDFB_ATTACH_FLAG_INVERSE ? true : false;
+ sc->sc_upsidedown = flags & SSDFB_ATTACH_FLAG_UPSIDEDOWN ? true : false;
+ sc->sc_backoff = 1;
+ sc->sc_contrast = sc->sc_p->p_default_contrast;
+ sc->sc_gddram_len = sc->sc_p->p_width * sc->sc_p->p_height / 8;
+ sc->sc_gddram = kmem_alloc(sc->sc_gddram_len, KM_SLEEP);
+ if (sc->sc_gddram == NULL)
+ goto out;
+
+ aprint_normal_dev(sc->sc_dev, "%dx%d%s\n", sc->sc_p->p_width,
+ sc->sc_p->p_height, sc->sc_is_console ? ", console" : "");
+
+ /*
+ * Initialize rasops. The native depth is 1-bit monochrome and we
+ * support this in text emul mode via rasops1. But modern Xorg
+ * userland has many rendering glitches when running with 1-bit depth
+ * so to better support this use case we instead declare ourselves as
+ * an 8-bit display with a two entry constant color map.
+ */
+ error = ssdfb_pick_font(&sc->sc_fontcookie, &sc->sc_font);
+ if (error) {
+ aprint_error_dev(sc->sc_dev, "no font\n");
+ goto out;
+ }
+ ri->ri_depth = 8;
+ ri->ri_font = sc->sc_font;
+ ri->ri_width = sc->sc_p->p_width;
+ ri->ri_height = sc->sc_p->p_height;
+ ri->ri_stride = ri->ri_width * ri->ri_depth / 8;
+ ri->ri_hw = sc;
+ ri->ri_flg = RI_FULLCLEAR;
+ sc->sc_ri_bits_len = round_page(ri->ri_stride * ri->ri_height);
+ ri->ri_bits = (u_char *)uvm_km_alloc(kernel_map, sc->sc_ri_bits_len,
+ 0, UVM_KMF_WIRED);
+ if (ri->ri_bits == NULL)
+ goto out;
+
+ error = rasops_init(ri,
+ sc->sc_p->p_height / sc->sc_font->fontheight,
+ sc->sc_p->p_width / sc->sc_font->fontwidth);
+ if (error)
+ goto out;
+
+ ri->ri_caps &= ~WSSCREEN_WSCOLORS;
+
+ /*
+ * Save original emul ops & insert our damage notification hooks.
+ */
+ sc->sc_orig_riops = ri->ri_ops;
+ ri->ri_ops.putchar = ssdfb_putchar;
+ ri->ri_ops.copycols = ssdfb_copycols;
+ ri->ri_ops.erasecols = ssdfb_erasecols;
+ ri->ri_ops.copyrows = ssdfb_copyrows;
+ ri->ri_ops.eraserows = ssdfb_eraserows;
+ ri->ri_ops.cursor = ssdfb_cursor;
+
+ /*
+ * Set up the screen.
+ */
+ sc->sc_screen_descr = (struct wsscreen_descr){
+ .name = "default",
+ .ncols = ri->ri_cols,
+ .nrows = ri->ri_rows,
+ .textops = &ri->ri_ops,
+ .fontwidth = ri->ri_font->fontwidth,
+ .fontheight = ri->ri_font->fontheight,
+ .capabilities = ri->ri_caps
+ };
+ sc->sc_screens[0] = &sc->sc_screen_descr;
+ sc->sc_screenlist = (struct wsscreen_list){
+ .nscreens = 1,
+ .screens = sc->sc_screens
+ };
+
+ /*
+ * Initialize hardware.
+ */
+ error = ssdfb_init(sc);
+ if (error)
+ goto out;
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