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From 848bed9d92cf20e9f25db4c69a20efad23996ca0 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Mon, 8 May 2017 21:42:37 +0200
Subject: [PATCH 024/176] arm_coreboot: Support keyboard for vexpress.
---
grub-core/Makefile.am | 1 +
grub-core/Makefile.core.def | 3 +
grub-core/kern/arm/coreboot/init.c | 1 +
grub-core/term/arm/pl050.c | 189 +++++++++++++++++++++++++++++++++++++
4 files changed, 194 insertions(+)
create mode 100644 grub-core/term/arm/pl050.c
diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
index 147e6959c..a2aaf9f54 100644
--- a/grub-core/Makefile.am
+++ b/grub-core/Makefile.am
@@ -240,6 +240,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/arm/system.h
endif
if COND_arm_coreboot
+KERNEL_HEADER_FILES += $(top_builddir)/include/grub/keyboard_layouts.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/arm/system.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/video.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/video_fb.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 6ade6e950..6be6e7f61 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -160,6 +160,9 @@ kernel = {
arm_coreboot = kern/arm/coreboot/coreboot.S;
arm_coreboot = lib/fdt.c;
arm_coreboot = bus/fdt.c;
+ arm_coreboot = term/ps2.c;
+ arm_coreboot = term/arm/pl050.c;
+ arm_coreboot = commands/keylayouts.c;
terminfoinkernel = term/terminfo.c;
terminfoinkernel = term/tparm.c;
diff --git a/grub-core/kern/arm/coreboot/init.c b/grub-core/kern/arm/coreboot/init.c
index aec75c672..a06ccb72f 100644
--- a/grub-core/kern/arm/coreboot/init.c
+++ b/grub-core/kern/arm/coreboot/init.c
@@ -133,6 +133,7 @@ grub_machine_init (void)
grub_fdtbus_init (dtb, dtb_size);
grub_machine_timer_init ();
+ grub_pl050_init ();
}
void
diff --git a/grub-core/term/arm/pl050.c b/grub-core/term/arm/pl050.c
new file mode 100644
index 000000000..e4cda3056
--- /dev/null
+++ b/grub-core/term/arm/pl050.c
@@ -0,0 +1,189 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2007,2008,2009 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/ps2.h>
+#include <grub/fdtbus.h>
+#include <grub/err.h>
+#include <grub/machine/kernel.h>
+#include <grub/at_keyboard.h>
+#include <grub/misc.h>
+#include <grub/term.h>
+#include <grub/time.h>
+#include <grub/ps2.h>
+#include <grub/fdtbus.h>
+
+static volatile grub_uint32_t *pl050_regs;
+
+struct grub_ps2_state ps2_state;
+
+static void
+keyboard_controller_wait_until_ready (void)
+{
+ while (! (pl050_regs[1] & 0x40));
+}
+
+static grub_uint8_t
+wait_ack (void)
+{
+ grub_uint64_t endtime;
+ grub_uint8_t ack;
+
+ endtime = grub_get_time_ms () + 20;
+ do
+ ack = pl050_regs[2];
+ while (ack != GRUB_AT_ACK && ack != GRUB_AT_NACK
+ && grub_get_time_ms () < endtime);
+ return ack;
+}
+
+
+static int
+write_mode (int mode)
+{
+ unsigned i;
+ for (i = 0; i < GRUB_AT_TRIES; i++)
+ {
+ grub_uint8_t ack;
+ keyboard_controller_wait_until_ready ();
+ pl050_regs[2] = 0xf0;
+ keyboard_controller_wait_until_ready ();
+ pl050_regs[2] = mode;
+ keyboard_controller_wait_until_ready ();
+ ack = wait_ack ();
+ if (ack == GRUB_AT_NACK)
+ continue;
+ if (ack == GRUB_AT_ACK)
+ break;
+ return 0;
+ }
+
+ return (i != GRUB_AT_TRIES);
+}
+
+static int
+query_mode (void)
+{
+ grub_uint8_t ret;
+ int e;
+
+ e = write_mode (0);
+ if (!e)
+ return 0;
+
+ keyboard_controller_wait_until_ready ();
+
+ do
+ ret = pl050_regs[2];
+ while (ret == GRUB_AT_ACK);
+
+ /* QEMU translates the set even in no-translate mode. */
+ if (ret == 0x43 || ret == 1)
+ return 1;
+ if (ret == 0x41 || ret == 2)
+ return 2;
+ if (ret == 0x3f || ret == 3)
+ return 3;
+ return 0;
+}
+
+static void
+set_scancodes (void)
+{
+ write_mode (2);
+ ps2_state.current_set = query_mode ();
+ grub_dprintf ("atkeyb", "returned set %d\n", ps2_state.current_set);
+ if (ps2_state.current_set == 2)
+ return;
+
+ write_mode (1);
+ ps2_state.current_set = query_mode ();
+ grub_dprintf ("atkeyb", "returned set %d\n", ps2_state.current_set);
+ if (ps2_state.current_set == 1)
+ return;
+ grub_dprintf ("atkeyb", "no supported scancode set found\n");
+}
+
+static void
+keyboard_controller_led (grub_uint8_t leds)
+{
+ keyboard_controller_wait_until_ready ();
+ pl050_regs[2] = 0xed;
+ keyboard_controller_wait_until_ready ();
+ pl050_regs[2] = leds & 0x7;
+}
+
+/* If there is a character pending, return it;
+ otherwise return GRUB_TERM_NO_KEY. */
+static int
+grub_pl050_keyboard_getkey (struct grub_term_input *term __attribute__ ((unused)))
+{
+ grub_uint8_t at_key;
+ int ret;
+ grub_uint8_t old_led;
+
+ if (!(pl050_regs[1] & 0x10))
+ return -1;
+ at_key = pl050_regs[2];
+ old_led = ps2_state.led_status;
+
+ ret = grub_ps2_process_incoming_byte (&ps2_state, at_key);
+ if (old_led != ps2_state.led_status)
+ keyboard_controller_led (ps2_state.led_status);
+ return ret;
+}
+
+static struct grub_term_input grub_pl050_keyboard_term =
+ {
+ .name = "pl050_keyboard",
+ .getkey = grub_pl050_keyboard_getkey
+ };
+
+static grub_err_t
+pl050_attach(const struct grub_fdtbus_dev *dev)
+{
+ const grub_uint32_t *reg;
+ reg = grub_fdtbus_get_prop (dev, "reg", 0);
+
+ /* Mouse. Nothing to do. */
+ if (grub_be_to_cpu32 (*reg) == 0x7000)
+ return 0;
+
+ pl050_regs = grub_fdtbus_map_reg (dev, 0, 0);
+
+ if (!grub_fdtbus_is_mapping_valid (pl050_regs))
+ return grub_error (GRUB_ERR_IO, "could not map pl050");
+
+ ps2_state.at_keyboard_status = 0;
+ set_scancodes ();
+ keyboard_controller_led (ps2_state.led_status);
+
+ grub_term_register_input ("pl050_keyboard", &grub_pl050_keyboard_term);
+ return GRUB_ERR_NONE;
+}
+
+struct grub_fdtbus_driver pl050 =
+{
+ .compatible = "arm,pl050",
+ .attach = pl050_attach
+};
+
+void
+grub_pl050_init (void)
+{
+ grub_fdtbus_register (&pl050);
+}
--
2.13.0
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