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[src/trunk]: src/sys/arch/arm/sunxi Add a basic sun5i FB driver. This assumes...
details: https://anonhg.NetBSD.org/src/rev/49da844b89ce
branches: trunk
changeset: 826291:49da844b89ce
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Sat Aug 26 22:24:50 2017 +0000
description:
Add a basic sun5i FB driver. This assumes that firmware (U-Boot) has
already setup the chip and re-uses the same settings / FB memory.
diffstat:
sys/arch/arm/sunxi/files.sunxi | 6 +-
sys/arch/arm/sunxi/sunxi_debe.c | 259 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 264 insertions(+), 1 deletions(-)
diffs (283 lines):
diff -r 16851f5e7598 -r 49da844b89ce sys/arch/arm/sunxi/files.sunxi
--- a/sys/arch/arm/sunxi/files.sunxi Sat Aug 26 21:58:31 2017 +0000
+++ b/sys/arch/arm/sunxi/files.sunxi Sat Aug 26 22:24:50 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.sunxi,v 1.17 2017/08/25 00:07:03 jmcneill Exp $
+# $NetBSD: files.sunxi,v 1.18 2017/08/26 22:24:50 jmcneill Exp $
#
# Configuration info for Allwinner sunxi family SoCs
#
@@ -139,6 +139,10 @@
attach h3codec at fdt with h3_codec
file arch/arm/sunxi/sun8i_h3_codec.c h3_codec needs-flag
+# Display controller
+attach genfb at fdt with sunxi_debe
+file arch/arm/sunxi/sunxi_debe.c sunxi_debe
+
# SOC parameters
defflag opt_soc.h SOC_SUNXI
defflag opt_soc.h SOC_SUN5I: SOC_SUNXI
diff -r 16851f5e7598 -r 49da844b89ce sys/arch/arm/sunxi/sunxi_debe.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/sunxi/sunxi_debe.c Sat Aug 26 22:24:50 2017 +0000
@@ -0,0 +1,259 @@
+/* $NetBSD: sunxi_debe.c,v 1.1 2017/08/26 22:24:50 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * 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 AUTHOR ``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 AUTHOR 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: sunxi_debe.c,v 1.1 2017/08/26 22:24:50 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <dev/wsfb/genfbvar.h>
+
+#define SUNXI_SDRAM_BASE 0x40000000
+
+#define DEBE_MAX_LAYER 4
+
+#define DEBE_MODCTL_REG 0x800
+#define DEBE_MODCTL_LAYn_EN(n) __BIT(8 + (n))
+#define DEBE_MODCTL_EN __BIT(0)
+#define DEBE_LAYSIZE_REG(n) (0x810 + (n) * 0x10)
+#define DEBE_LAYSIZE_HEIGHT __BITS(28,16)
+#define DEBE_LAYSIZE_WIDTH __BITS(12,0)
+#define DEBE_LAYCOOR_REG(n) (0x820 + (n) * 0x4)
+#define DEBE_LAYLINEWIDTH_REG(n) (0x840 + (n) * 0x4)
+#define DEBE_L32ADD_REG(n) (0x850 + (n) * 0x4)
+#define DEBE_H4ADD_REG 0x860
+#define DEBE_H4ADD(n) __BITS((n) * 8 + 3, (n) * 8)
+
+static const char * const compatible[] = {
+ "allwinner,sun5i-a13-display-backend",
+ NULL
+};
+
+struct sunxi_debe_softc {
+ struct genfb_softc sc_gen;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ int sc_phandle;
+
+ bus_space_handle_t sc_fb_bsh;
+ bus_addr_t sc_fb_paddr;
+};
+
+#define BE_READ(sc, reg) \
+ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define BE_WRITE(sc, reg, val) \
+ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+static bool
+sunxi_debe_shutdown(device_t self, int flags)
+{
+ genfb_enable_polling(self);
+ return true;
+}
+
+static int
+sunxi_debe_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, lwp_t *l)
+{
+ struct sunxi_debe_softc * const sc = v;
+ struct wsdisplayio_bus_id *busid;
+ struct wsdisplayio_fbinfo *fbi;
+ struct rasops_info *ri;
+ int error;
+
+ switch (cmd) {
+ case WSDISPLAYIO_GTYPE:
+ *(u_int *)data = WSDISPLAY_TYPE_ALLWINNER;
+ return 0;
+ case WSDISPLAYIO_GET_BUSID:
+ busid = data;
+ busid->bus_type = WSDISPLAYIO_BUS_SOC;
+ return 0;
+ case WSDISPLAYIO_GET_FBINFO:
+ fbi = data;
+ ri = &sc->sc_gen.vd.active->scr_ri;
+ error = wsdisplayio_get_fbinfo(ri, fbi);
+ if (error == 0)
+ fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
+ return error;
+ default:
+ return EPASSTHROUGH;
+ }
+}
+
+static paddr_t
+sunxi_debe_mmap(void *v, void *vs, off_t off, int prot)
+{
+ struct sunxi_debe_softc * const sc = v;
+
+ if (off < 0 || off >= sc->sc_gen.sc_fbsize)
+ return -1;
+
+ return bus_space_mmap(sc->sc_bst, sc->sc_fb_paddr, off, prot,
+ BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE);
+}
+
+static void
+sunxi_debe_attach_layer(struct sunxi_debe_softc *sc, u_int lay)
+{
+ prop_dictionary_t dict = device_properties(sc->sc_gen.sc_dev);
+ struct genfb_ops ops;
+
+ const uint32_t size = BE_READ(sc, DEBE_LAYSIZE_REG(lay));
+ const uint32_t linewidth = BE_READ(sc, DEBE_LAYLINEWIDTH_REG(lay));
+ const uint32_t l32add = BE_READ(sc, DEBE_L32ADD_REG(lay));
+ const uint32_t h4add = BE_READ(sc, DEBE_H4ADD_REG);
+
+ const int width = __SHIFTOUT(size, DEBE_LAYSIZE_WIDTH) + 1;
+ const int height = __SHIFTOUT(size, DEBE_LAYSIZE_HEIGHT) + 1;
+ const int stride = linewidth / NBBY;
+ const uint64_t fbaddr_bits =
+ l32add | (__SHIFTOUT(h4add, DEBE_H4ADD(lay)) << 32);
+ const uint32_t fbaddr = SUNXI_SDRAM_BASE +
+ (uint32_t)(fbaddr_bits / NBBY);
+ const int fbsize = height * stride;
+
+ aprint_normal_dev(sc->sc_gen.sc_dev,
+ "attaching %dx%d fb to layer %d @ 0x%08x size 0x%x\n",
+ width, height, lay, fbaddr, fbsize);
+
+ if (bus_space_map(sc->sc_bst, fbaddr, fbsize,
+ BUS_SPACE_MAP_LINEAR, &sc->sc_fb_bsh) != 0) {
+ aprint_error_dev(sc->sc_gen.sc_dev, "failed to map fb\n");
+ return;
+ }
+
+ sc->sc_fb_paddr = fbaddr;
+
+ prop_dictionary_set_uint32(dict, "width", width);
+ prop_dictionary_set_uint32(dict, "height", height);
+ prop_dictionary_set_uint8(dict, "depth", 32);
+ prop_dictionary_set_uint16(dict, "linebytes", stride);
+ prop_dictionary_set_uint32(dict, "address", fbaddr);
+ prop_dictionary_set_uint32(dict, "virtual_address",
+ (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_fb_bsh));
+
+ genfb_init(&sc->sc_gen);
+
+ if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) {
+ aprint_normal(": disabled\n");
+ return;
+ }
+
+ pmf_device_register1(sc->sc_gen.sc_dev, NULL, NULL,
+ sunxi_debe_shutdown);
+
+ memset(&ops, 0, sizeof(ops));
+ ops.genfb_ioctl = sunxi_debe_ioctl;
+ ops.genfb_mmap = sunxi_debe_mmap;
+
+ bool is_console = false;
+ prop_dictionary_get_bool(dict, "is_console", &is_console);
+ prop_dictionary_set_bool(dict, "is_console", is_console);
+
+ if (is_console)
+ aprint_normal_dev(sc->sc_gen.sc_dev,
+ "switching to framebuffer console\n");
+
+ genfb_attach(&sc->sc_gen, &ops);
+}
+
+static int
+sunxi_debe_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct fdt_attach_args * const faa = aux;
+
+ return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+sunxi_debe_attach(device_t parent, device_t self, void *aux)
+{
+ struct sunxi_debe_softc * const sc = device_private(self);
+ struct fdt_attach_args * const faa = aux;
+ const int phandle = faa->faa_phandle;
+ struct fdtbus_reset *rst;
+ struct clk *clk;
+ bus_addr_t addr;
+ bus_size_t size;
+ u_int lay;
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+ aprint_error(": couldn't get registers\n");
+ return;
+ }
+
+ if ((clk = fdtbus_clock_get(phandle, "ahb")) == NULL ||
+ clk_enable(clk) != 0) {
+ aprint_error(": couldn't enable ahb clock\n");
+ return;
+ }
+ if ((rst = fdtbus_reset_get_index(phandle, 0)) == NULL ||
+ fdtbus_reset_deassert(rst) != 0) {
+ aprint_error(": couldn't de-assert reset\n");
+ return;
+ }
+
+ sc->sc_gen.sc_dev = self;
+ sc->sc_phandle = phandle;
+ sc->sc_bst = faa->faa_bst;
+ if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": couldn't map registers\n");
+ return;
+ }
+
+ aprint_naive("\n");
+ aprint_normal(": Display Backend\n");
+
+ aprint_normal_dev(self, "boot config:");
+ const uint32_t modctl = BE_READ(sc, DEBE_MODCTL_REG);
+ aprint_normal(" %08x\n", modctl);
+
+ if ((modctl & DEBE_MODCTL_EN) == 0) {
+ aprint_normal_dev(self, "not enabled by firmware\n");
+ return;
+ }
+
+ for (lay = 0; lay < DEBE_MAX_LAYER; lay++) {
+ if ((modctl & DEBE_MODCTL_LAYn_EN(lay)) == 0)
+ continue;
+ sunxi_debe_attach_layer(sc, lay);
+ break;
+ }
+ if (lay == DEBE_MAX_LAYER) {
+ aprint_error_dev(self, "no layers enabled\n");
+ return;
+ }
+}
+
+CFATTACH_DECL_NEW(sunxi_debe, sizeof(struct sunxi_debe_softc),
+ sunxi_debe_match, sunxi_debe_attach, NULL, NULL);
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