Module Name: src
Committed By: jmcneill
Date: Thu Jul 5 13:11:58 UTC 2018
Modified Files:
src/sys/arch/arm/samsung: exynos5422_clock.c exynos_soc.c files.exynos
sscom_reg.h
src/sys/arch/evbarm/conf: EXYNOS
src/sys/arch/evbarm/exynos: exynos_start.S
Added Files:
src/sys/arch/arm/samsung: exynos_uart.c
Removed Files:
src/sys/arch/arm/samsung: exynos_sscom.c sscom.c sscom_var.h
Log Message:
Replace sscom with a much simpler uart driver. The simpler driver is 1/4th
the size and has the added benefit of not freezing when an arrow key is
pressed.
To generate a diff of this commit:
cvs rdiff -u -r1.11 -r1.12 src/sys/arch/arm/samsung/exynos5422_clock.c
cvs rdiff -u -r1.32 -r1.33 src/sys/arch/arm/samsung/exynos_soc.c
cvs rdiff -u -r1.11 -r0 src/sys/arch/arm/samsung/exynos_sscom.c
cvs rdiff -u -r0 -r1.1 src/sys/arch/arm/samsung/exynos_uart.c
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/arm/samsung/files.exynos
cvs rdiff -u -r1.10 -r0 src/sys/arch/arm/samsung/sscom.c
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/arm/samsung/sscom_reg.h
cvs rdiff -u -r1.5 -r0 src/sys/arch/arm/samsung/sscom_var.h
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/evbarm/conf/EXYNOS
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/evbarm/exynos/exynos_start.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/samsung/exynos5422_clock.c
diff -u src/sys/arch/arm/samsung/exynos5422_clock.c:1.11 src/sys/arch/arm/samsung/exynos5422_clock.c:1.12
--- src/sys/arch/arm/samsung/exynos5422_clock.c:1.11 Wed Jul 4 23:06:28 2018
+++ src/sys/arch/arm/samsung/exynos5422_clock.c Thu Jul 5 13:11:58 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: exynos5422_clock.c,v 1.11 2018/07/04 23:06:28 jmcneill Exp $ */
+/* $NetBSD: exynos5422_clock.c,v 1.12 2018/07/05 13:11:58 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca>
@@ -29,7 +29,7 @@
#include "locators.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: exynos5422_clock.c,v 1.11 2018/07/04 23:06:28 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: exynos5422_clock.c,v 1.12 2018/07/05 13:11:58 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -555,6 +555,24 @@ static struct exynos_clk exynos5422_cloc
CLK_GATE("usbd301", "aclk200_fsys", EXYNOS5422_GATE_IP_FSYS,
__BIT(20), CLK_SET_RATE_PARENT),
+ CLK_GATE("uart0", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(0), CLK_SET_RATE_PARENT),
+ CLK_GATE("uart1", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(1), CLK_SET_RATE_PARENT),
+ CLK_GATE("uart2", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(2), CLK_SET_RATE_PARENT),
+ CLK_GATE("uart3", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(3), CLK_SET_RATE_PARENT),
+ CLK_GATE("i2c0", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(6), CLK_SET_RATE_PARENT),
+ CLK_GATE("i2c1", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(7), CLK_SET_RATE_PARENT),
+ CLK_GATE("i2c2", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(8), CLK_SET_RATE_PARENT),
+ CLK_GATE("i2c3", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(9), CLK_SET_RATE_PARENT),
+ CLK_GATE("i2c_hdmi", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
+ __BIT(14), CLK_SET_RATE_PARENT),
CLK_GATE("pwm", "mout_user_aclk66_peric", EXYNOS5422_GATE_IP_PERIC,
__BIT(24), CLK_SET_RATE_PARENT),
};
Index: src/sys/arch/arm/samsung/exynos_soc.c
diff -u src/sys/arch/arm/samsung/exynos_soc.c:1.32 src/sys/arch/arm/samsung/exynos_soc.c:1.33
--- src/sys/arch/arm/samsung/exynos_soc.c:1.32 Sat Jun 10 15:13:18 2017
+++ src/sys/arch/arm/samsung/exynos_soc.c Thu Jul 5 13:11:58 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: exynos_soc.c,v 1.32 2017/06/10 15:13:18 jmcneill Exp $ */
+/* $NetBSD: exynos_soc.c,v 1.33 2018/07/05 13:11:58 jmcneill Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -32,7 +32,7 @@
#include "opt_exynos.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: exynos_soc.c,v 1.32 2017/06/10 15:13:18 jmcneill Exp $");
+__KERNEL_RCSID(1, "$NetBSD: exynos_soc.c,v 1.33 2018/07/05 13:11:58 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -137,47 +137,6 @@ bus_space_handle_t exynos_sysreg_bsh;
static int sysctl_cpufreq_target(SYSCTLFN_ARGS);
static int sysctl_cpufreq_current(SYSCTLFN_ARGS);
-/*
- * the early serial console
- */
-#ifdef EXYNOS_CONSOLE_EARLY
-
-#include "opt_sscom.h"
-#include <arm/samsung/sscom_reg.h>
-#include <arm/samsung/sscom_var.h>
-#include <dev/cons.h>
-
-static volatile uint8_t *uart_base;
-
-#define CON_REG(a) (*((volatile uint32_t *)(uart_base + (a))))
-
-static int
-exynos_cngetc(dev_t dv)
-{
- if ((CON_REG(SSCOM_UTRSTAT) & UTRSTAT_RXREADY) == 0)
- return -1;
-
- return CON_REG(SSCOM_URXH);
-}
-
-static void
-exynos_cnputc(dev_t dv, int c)
-{
- int timo = 150000;
-
- while ((CON_REG(SSCOM_UFSTAT) & UFSTAT_TXFULL) && --timo > 0);
-
- CON_REG(SSCOM_UTXH) = c & 0xff;
-}
-
-static struct consdev exynos_earlycons = {
- .cn_putc = exynos_cnputc,
- .cn_getc = exynos_cngetc,
- .cn_pollc = nullcnpollc,
-};
-#endif /* EXYNOS_CONSOLE_EARLY */
-
-
#ifdef ARM_TRUSTZONE_FIRMWARE
int
exynos_do_idle(void)
Index: src/sys/arch/arm/samsung/files.exynos
diff -u src/sys/arch/arm/samsung/files.exynos:1.29 src/sys/arch/arm/samsung/files.exynos:1.30
--- src/sys/arch/arm/samsung/files.exynos:1.29 Wed Jul 4 23:06:54 2018
+++ src/sys/arch/arm/samsung/files.exynos Thu Jul 5 13:11:58 2018
@@ -1,4 +1,4 @@
-# $NetBSD: files.exynos,v 1.29 2018/07/04 23:06:54 jmcneill Exp $
+# $NetBSD: files.exynos,v 1.30 2018/07/05 13:11:58 jmcneill Exp $
#
# Configuration info for Samsung Exynos SoC ARM Peripherals
#
@@ -66,12 +66,9 @@ attach exyowdt at fdt with exynos_wdt
file arch/arm/samsung/exynos_wdt.c exynos_wdt needs-flag
# UARTs
-device sscom { } : bus_space_generic
-attach sscom at fdt with exynos_sscom
-file arch/arm/samsung/sscom.c sscom needs-flag
-file arch/arm/samsung/exynos_sscom.c exynos_sscom
-defflag opt_sscom.h SSCOM0CONSOLE SSCOM1CONSOLE
-defparam opt_sscom.h SSCOM_FREQ
+device exuart
+attach exuart at fdt with exynos_uart
+file arch/arm/samsung/exynos_uart.c exynos_uart
# PINCTL
device exyopctl : gpiobus
Index: src/sys/arch/arm/samsung/sscom_reg.h
diff -u src/sys/arch/arm/samsung/sscom_reg.h:1.2 src/sys/arch/arm/samsung/sscom_reg.h:1.3
--- src/sys/arch/arm/samsung/sscom_reg.h:1.2 Mon Apr 14 21:16:15 2014
+++ src/sys/arch/arm/samsung/sscom_reg.h Thu Jul 5 13:11:58 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: sscom_reg.h,v 1.2 2014/04/14 21:16:15 reinoud Exp $ */
+/* $NetBSD: sscom_reg.h,v 1.3 2018/07/05 13:11:58 jmcneill Exp $ */
/*
* Copyright (c) 2002, 2003 Fujitsu Component Limited
@@ -49,6 +49,7 @@
#define ULCON_PARITY_ONE __SHIFTIN(6, ULCON_PARITY)
#define ULCON_PARITY_ZERO __SHIFTIN(7, ULCON_PARITY)
#define ULCON_STOP __BIT(2)
+#define ULCON_LENGTH __BITS(1,0)
#define ULCON_LENGTH_5 0
#define ULCON_LENGTH_6 1
#define ULCON_LENGTH_7 2
Index: src/sys/arch/evbarm/conf/EXYNOS
diff -u src/sys/arch/evbarm/conf/EXYNOS:1.29 src/sys/arch/evbarm/conf/EXYNOS:1.30
--- src/sys/arch/evbarm/conf/EXYNOS:1.29 Wed Jul 4 23:08:29 2018
+++ src/sys/arch/evbarm/conf/EXYNOS Thu Jul 5 13:11:57 2018
@@ -1,5 +1,5 @@
#
-# $NetBSD: EXYNOS,v 1.29 2018/07/04 23:08:29 jmcneill Exp $
+# $NetBSD: EXYNOS,v 1.30 2018/07/05 13:11:57 jmcneill Exp $
#
# Samsung Exynos SoC kernel
#
@@ -28,8 +28,6 @@ pseudo-device openfirm # /dev/openfirm
#options PMAP_DEBUG # Enable pmap_debug_level code
#options IPKDB # remote kernel debugging
#options VERBOSE_INIT_ARM # verbose bootstrapping messages
-# SSCOMnCONSOLE is required for early init messages from VERBOSE_INIT_ARM.
-#options SSCOM2CONSOLE
makeoptions DEBUG="-g" # compile full symbol table
makeoptions COPY_SYMTAB=1
@@ -76,7 +74,7 @@ expwm* at fdt? pass 4 # PWM
pwmfan* at fdt? # PWM Fan controls
# UART
-sscom* at fdt? # UART
+exuart* at fdt? # UART
# I2C
exyoi2c* at fdt? # I2C
Index: src/sys/arch/evbarm/exynos/exynos_start.S
diff -u src/sys/arch/evbarm/exynos/exynos_start.S:1.5 src/sys/arch/evbarm/exynos/exynos_start.S:1.6
--- src/sys/arch/evbarm/exynos/exynos_start.S:1.5 Sat Mar 3 13:46:32 2018
+++ src/sys/arch/evbarm/exynos/exynos_start.S Thu Jul 5 13:11:58 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: exynos_start.S,v 1.5 2018/03/03 13:46:32 skrll Exp $ */
+/* $NetBSD: exynos_start.S,v 1.6 2018/07/05 13:11:58 jmcneill Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -30,7 +30,6 @@
*/
#include "opt_exynos.h"
-#include "opt_sscom.h"
#include "opt_cpuoptions.h"
#include "opt_cputypes.h"
#include "opt_multiprocessor.h"
@@ -46,24 +45,10 @@
#include <evbarm/exynos/platform.h>
-RCSID("$NetBSD: exynos_start.S,v 1.5 2018/03/03 13:46:32 skrll Exp $")
+RCSID("$NetBSD: exynos_start.S,v 1.6 2018/07/05 13:11:58 jmcneill Exp $")
-
-#if defined(VERBOSE_INIT_ARM)
-
-#define XPUTC(n) mov r0, n; bl exynos_putc
-#if KERNEL_BASE_VOFFSET == 0
-#define XPUTC2(n) mov r0, n; bl exynos_putc
-#else
-#define XPUTC2(n) mov r0, n; blx r11
-#endif
-#ifdef __ARMEB__
-#define COM_BSWAP
-#endif
-#else
-#define XPUTC(n)
-#define XPUTC2(n)
-#endif
+#define XPUTC(n)
+#define XPUTC2(n)
#define INIT_MEMSIZE 128
@@ -135,23 +120,6 @@ _C_LABEL(exynos_start):
str r0, [r4] // save soc_id
mov r5, r0 // save soc_id
- /* Pick uart address for the SoC */
- adr r1, .Lsscom_exynos5_table
-#ifdef SSCOM0CONSOLE
- ldr r2, [r1, #0*8+4]
-#endif
-#ifdef SSCOM1CONSOLE
- ldr r2, [r1, #1*8+4]
-#endif
-#ifdef SSCOM2CONSOLE
- ldr r2, [r1, #2*8+4]
-#endif
-#ifdef SSCOM3CONSOLE
- ldr r2, [r1, #3*8+4]
-#endif
- add r2, r2, #EXYNOS_CORE_PBASE
- mcr p15, 0, r2, c13, c0, 3 // TPIDRURO set (uart address)
-
/*
* Turn on the SMP bit
*/
@@ -183,9 +151,6 @@ _C_LABEL(exynos_start):
* so setup the lr to be in .text. Cache the address for exynos_putc
* before we go.
*/
-#if defined(VERBOSE_INIT_ARM)
- adr r11, exynos_putc @ for XPUTC2
-#endif
movw lr, #:lower16:1f
movt lr, #:upper16:1f
b arm_cpuinit
@@ -207,63 +172,6 @@ _C_LABEL(exynos_start):
.popsection
#endif
- .align 0
- .global _C_LABEL(num_exynos_uarts_entries)
-_C_LABEL(num_exynos_uarts_entries):
- .word 8 // update number of entries!!!
- .global _C_LABEL(exynos_uarts)
-_C_LABEL(exynos_uarts):
-.Lsscom_exynos5_table:
- .word 0
- .word EXYNOS5_UART0_OFFSET
- .word 1
- .word EXYNOS5_UART1_OFFSET
- .word 2
- .word EXYNOS5_UART2_OFFSET
- .word 3
- .word EXYNOS5_UART3_OFFSET
-
-
-#if defined(VERBOSE_INIT_ARM)
- .align 0
- .global exynos_putc
- .global _C_LABEL(exynos_putchar)
- .type exynos_putc,%function
-
-#define TIMO 0x25000
-_C_LABEL(exynos_putchar):
-exynos_putc:
- mov r2, #TIMO
- mrc p15, 0, r3, c13, c0, 3 // TPIDRURO get (uart address)
-1:
- ldr r1, [r3, #SSCOM_UTRSTAT]
-#ifdef __ARMEB__
- rev r1, r1
-#endif
- tst r1, #UTRSTAT_TXEMPTY
- bne 2f
- subs r2, r2, #1
- bne 1b
-2:
-#ifdef __ARMEB__
- rev r0, r0
-#endif
- str r0, [r3, #SSCOM_UTXH]
-
- mov r2, #TIMO
-3:
- ldr r1, [r3, #SSCOM_UTRSTAT]
-#ifdef __ARMEB__
- rev r1, r1
-#endif
- tst r1, #UTRSTAT_TXSHIFTER_EMPTY
- bne 4f
- subs r2, r2, #1
- bne 3b
-4:
- bx lr
-#endif
-
#include <arm/cortex/a9_mpsubr.S>
.align 0
@@ -289,6 +197,26 @@ mmu_init_table:
EXYNOS_CORE_SIZE / L1_S_SIZE,
L1_S_PROTO_armv7 | L1_S_APv7_KRW | L1_S_V6_XN)
+ /* Map EXYNOS AUDIOBASE */
+ MMU_INIT(EXYNOS5_AUDIOCORE_VBASE, EXYNOS5_AUDIOCORE_VBASE,
+ EXYNOS5_AUDIOCORE_SIZE / L1_S_SIZE,
+ L1_S_PROTO_armv7 | L1_S_APv7_KRW | L1_S_V6_XN)
+
+ /* Map EXYNOS AUDIOBASE */
+ MMU_INIT(EXYNOS5_AUDIOCORE_PBASE, EXYNOS5_AUDIOCORE_VBASE,
+ EXYNOS5_AUDIOCORE_SIZE / L1_S_SIZE,
+ L1_S_PROTO_armv7 | L1_S_APv7_KRW | L1_S_V6_XN)
+
+ /* Map sysram for MP startup */
+ MMU_INIT(EXYNOS5_SYSRAM_VBASE, EXYNOS5_SYSRAM_PBASE,
+ EXYNOS5_SYSRAM_SIZE / L1_S_SIZE,
+ L1_S_PROTO_armv7 | L1_S_APv7_KRW | L1_S_V6_XN)
+
+ /* Map sysram for MP startup */
+ MMU_INIT(EXYNOS5_SYSRAM_PBASE, EXYNOS5_SYSRAM_PBASE,
+ EXYNOS5_SYSRAM_SIZE / L1_S_SIZE,
+ L1_S_PROTO_armv7 | L1_S_APv7_KRW | L1_S_V6_XN)
+
/* Map DTB location in SDRAM, patched in later */
.Lmmu_init_table_dtb:
MMU_INIT(0, 0, 0, 0)
Added files:
Index: src/sys/arch/arm/samsung/exynos_uart.c
diff -u /dev/null src/sys/arch/arm/samsung/exynos_uart.c:1.1
--- /dev/null Thu Jul 5 13:11:58 2018
+++ src/sys/arch/arm/samsung/exynos_uart.c Thu Jul 5 13:11:58 2018
@@ -0,0 +1,598 @@
+/* $NetBSD: exynos_uart.c,v 1.1 2018/07/05 13:11:58 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2013-2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry and Jared McNeill.
+ *
+ * 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 "locators.h"
+
+#include <sys/cdefs.h>
+
+__KERNEL_RCSID(1, "$NetBSD: exynos_uart.c,v 1.1 2018/07/05 13:11:58 jmcneill Exp $");
+
+#define cn_trap() \
+ do { \
+ console_debugger(); \
+ cn_trapped = 1; \
+ } while (/* CONSTCOND */ 0)
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+#include <sys/time.h>
+#include <sys/termios.h>
+#include <sys/kauth.h>
+#include <sys/lwp.h>
+#include <sys/tty.h>
+
+#include <dev/cons.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <arm/samsung/sscom_reg.h>
+
+static int exynos_uart_match(device_t, cfdata_t, void *);
+static void exynos_uart_attach(device_t, device_t, void *);
+
+static int exynos_uart_intr(void *);
+
+static int exynos_uart_cngetc(dev_t);
+static void exynos_uart_cnputc(dev_t, int);
+static void exynos_uart_cnpollc(dev_t, int);
+
+static void exynos_uart_start(struct tty *);
+static int exynos_uart_param(struct tty *, struct termios *);
+
+extern struct cfdriver exuart_cd;
+
+struct exynos_uart_softc {
+ device_t sc_dev;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ u_int sc_freq;
+ void *sc_ih;
+
+ bool sc_console;
+ struct tty *sc_tty;
+
+ int sc_ospeed;
+ tcflag_t sc_cflag;
+
+ u_char sc_buf[1024];
+};
+
+#define RD4(sc, reg) \
+ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define WR4(sc, reg, val) \
+ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+static bus_addr_t exynos_uart_consaddr;
+
+static struct exynos_uart_softc exynos_uart_cnsc;
+
+static struct cnm_state exynos_uart_cnm_state;
+
+struct consdev exynos_uart_consdev = {
+ .cn_getc = exynos_uart_cngetc,
+ .cn_putc = exynos_uart_cnputc,
+ .cn_pollc = exynos_uart_cnpollc,
+ .cn_dev = NODEV,
+ .cn_pri = CN_NORMAL,
+};
+
+static dev_type_open(exynos_uart_open);
+static dev_type_open(exynos_uart_close);
+static dev_type_read(exynos_uart_read);
+static dev_type_write(exynos_uart_write);
+static dev_type_ioctl(exynos_uart_ioctl);
+static dev_type_tty(exynos_uart_tty);
+static dev_type_poll(exynos_uart_poll);
+static dev_type_stop(exynos_uart_stop);
+
+const struct cdevsw exuart_cdevsw = {
+ .d_open = exynos_uart_open,
+ .d_close = exynos_uart_close,
+ .d_read = exynos_uart_read,
+ .d_write = exynos_uart_write,
+ .d_ioctl = exynos_uart_ioctl,
+ .d_stop = exynos_uart_stop,
+ .d_tty = exynos_uart_tty,
+ .d_poll = exynos_uart_poll,
+ .d_mmap = nommap,
+ .d_kqfilter = ttykqfilter,
+ .d_discard = nodiscard,
+ .d_flag = D_TTY
+};
+
+static int exynos_uart_cmajor = -1;
+
+static const char * const compatible[] = {
+ "samsung,exynos4210-uart",
+ NULL
+};
+
+CFATTACH_DECL_NEW(exynos_uart, sizeof(struct exynos_uart_softc),
+ exynos_uart_match, exynos_uart_attach, NULL, NULL);
+
+static int
+exynos_uart_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
+exynos_uart_attach(device_t parent, device_t self, void *aux)
+{
+ struct exynos_uart_softc * const sc = device_private(self);
+ struct fdt_attach_args * const faa = aux;
+ const int phandle = faa->faa_phandle;
+ char intrstr[128];
+ struct clk *clk_uart, *clk_uart_baud0;
+ struct tty *tp;
+ int major, minor;
+ bus_addr_t addr;
+ bus_size_t size;
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+ aprint_error(": couldn't get registers\n");
+ return;
+ }
+ if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
+ aprint_error(": failed to decode interrupt\n");
+ return;
+ }
+ clk_uart = fdtbus_clock_get(phandle, "uart");
+ if (clk_uart == NULL || clk_enable(clk_uart) != 0) {
+ aprint_error(": failed to enable uart clock\n");
+ return;
+ }
+ clk_uart_baud0 = fdtbus_clock_get(phandle, "clk_uart_baud0");
+ if (clk_uart_baud0 == NULL || clk_enable(clk_uart_baud0) != 0) {
+ aprint_error(": failed to enable clk_uart_baud0 clock\n");
+ return;
+ }
+
+ const bool is_console = exynos_uart_consaddr == addr;
+
+ sc->sc_dev = self;
+ sc->sc_bst = faa->faa_bst;
+ sc->sc_console = is_console;
+ if (is_console) {
+ sc->sc_bsh = exynos_uart_cnsc.sc_bsh;
+ } else {
+ if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": failed to map registers\n");
+ return;
+ }
+ }
+ sc->sc_freq = clk_get_rate(clk_uart_baud0);
+
+ sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_SERIAL,
+ 0, exynos_uart_intr, sc);
+ if (sc->sc_ih == NULL) {
+ aprint_error(": failed to establish interrupt on %s\n",
+ intrstr);
+ return;
+ }
+
+ if (exynos_uart_cmajor == -1) {
+ /* allocate a major number */
+ int bmajor = -1, cmajor = -1;
+ int error = devsw_attach("exuart", NULL, &bmajor,
+ &exuart_cdevsw, &cmajor);
+ if (error) {
+ aprint_error(": couldn't allocate major number\n");
+ return;
+ }
+ exynos_uart_cmajor = cmajor;
+ }
+
+ major = cdevsw_lookup_major(&exuart_cdevsw);
+ minor = device_unit(self);
+
+ tp = sc->sc_tty = tty_alloc();
+ tp->t_oproc = exynos_uart_start;
+ tp->t_param = exynos_uart_param;
+ tp->t_dev = makedev(major, minor);
+ tp->t_sc = sc;
+ tty_attach(tp);
+
+ aprint_naive("\n");
+ if (is_console) {
+ cn_tab->cn_dev = tp->t_dev;
+ aprint_normal(": console");
+ }
+ aprint_normal("\n");
+
+ if (is_console)
+ delay(10000);
+
+ /* Initialize device */
+ WR4(sc, SSCOM_UFCON,
+ __SHIFTIN(2, UFCON_TXTRIGGER) |
+ __SHIFTIN(1, UFCON_RXTRIGGER) |
+ UFCON_TXFIFO_RESET | UFCON_RXFIFO_RESET |
+ UFCON_FIFO_ENABLE);
+ /* Configure PIO mode with RX timeout interrupts */
+ WR4(sc, SSCOM_UCON,
+ __SHIFTIN(3, UCON_RXTO) |
+ UCON_TOINT | UCON_ERRINT |
+ UCON_TXMODE_INT | UCON_RXMODE_INT);
+
+ /* Disable interrupts */
+ WR4(sc, SSCOM_UINTM, ~0u);
+
+ aprint_normal_dev(self, "interrupting on %s\n", intrstr);
+}
+
+static int
+exynos_uart_cngetc(dev_t dev)
+{
+ struct exynos_uart_softc * const sc = &exynos_uart_cnsc;
+ uint32_t status;
+ int s, c;
+
+ s = splserial();
+
+ status = RD4(sc, SSCOM_UTRSTAT);
+ if ((status & UTRSTAT_RXREADY) == 0) {
+ splx(s);
+ return -1;
+ }
+
+ c = bus_space_read_1(sc->sc_bst, sc->sc_bsh, SSCOM_URXH);
+#if defined(DDB)
+ extern int db_active;
+ if (!db_active)
+#endif
+ {
+ int cn_trapped __unused = 0;
+ cn_check_magic(dev, c, exynos_uart_cnm_state);
+ }
+
+ splx(s);
+
+ return c & 0xff;
+}
+
+static void
+exynos_uart_cnputc(dev_t dev, int c)
+{
+ struct exynos_uart_softc * const sc = &exynos_uart_cnsc;
+ int s;
+
+ s = splserial();
+ while ((RD4(sc, SSCOM_UFSTAT) & UFSTAT_TXFULL) != 0)
+ ;
+
+ bus_space_write_1(sc->sc_bst, sc->sc_bsh, SSCOM_UTXH, c);
+
+ splx(s);
+}
+
+
+static void
+exynos_uart_cnpollc(dev_t dev, int on)
+{
+}
+
+static void
+exynos_uart_cnattach(bus_space_tag_t bst, bus_space_handle_t bsh,
+ int ospeed, tcflag_t cflag)
+{
+ struct exynos_uart_softc *sc = &exynos_uart_cnsc;
+
+ cn_tab = &exynos_uart_consdev;
+ cn_init_magic(&exynos_uart_cnm_state);
+ cn_set_magic("\047\001");
+
+ sc->sc_bst = bst;
+ sc->sc_bsh = bsh;
+ sc->sc_ospeed = ospeed;
+ sc->sc_cflag = cflag;
+}
+
+static int
+exynos_uart_open(dev_t dev, int flag, int mode, lwp_t *l)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+
+ if (kauth_authorize_device_tty(l->l_cred,
+ KAUTH_DEVICE_TTY_OPEN, tp) != 0) {
+ return EBUSY;
+ }
+
+ if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) {
+ tp->t_dev = dev;
+ ttychars(tp);
+ tp->t_iflag = TTYDEF_IFLAG;
+ tp->t_oflag = TTYDEF_OFLAG;
+ tp->t_lflag = TTYDEF_LFLAG;
+ if (sc->sc_console) {
+ tp->t_ispeed = tp->t_ospeed = exynos_uart_cnsc.sc_ospeed;
+ tp->t_cflag = exynos_uart_cnsc.sc_cflag;
+ } else {
+ tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
+ tp->t_cflag = TTYDEF_CFLAG;
+ }
+ ttsetwater(tp);
+ }
+ tp->t_state |= TS_CARR_ON;
+
+ /* Enable RX and error interrupts */
+ WR4(sc, SSCOM_UINTM, ~0u & ~(UINT_RXD|UINT_ERROR));
+
+ return tp->t_linesw->l_open(dev, tp);
+}
+
+static int
+exynos_uart_close(dev_t dev, int flag, int mode, lwp_t *l)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+
+ tp->t_linesw->l_close(tp, flag);
+ ttyclose(tp);
+
+ /* Disable interrupts */
+ WR4(sc, SSCOM_UINTM, ~0u);
+
+ return 0;
+}
+
+static int
+exynos_uart_read(dev_t dev, struct uio *uio, int flag)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+
+ return tp->t_linesw->l_read(tp, uio, flag);
+}
+
+static int
+exynos_uart_write(dev_t dev, struct uio *uio, int flag)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+
+ return tp->t_linesw->l_write(tp, uio, flag);
+}
+
+static int
+exynos_uart_poll(dev_t dev, int events, lwp_t *l)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+
+ return tp->t_linesw->l_poll(tp, events, l);
+}
+
+static int
+exynos_uart_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+ struct tty *tp = sc->sc_tty;
+ int error;
+
+ error = tp->t_linesw->l_ioctl(tp, cmd, data, flag, l);
+ if (error != EPASSTHROUGH)
+ return error;
+
+ return ttioctl(tp, cmd, data, flag, l);
+}
+
+static struct tty *
+exynos_uart_tty(dev_t dev)
+{
+ struct exynos_uart_softc *sc =
+ device_lookup_private(&exuart_cd, minor(dev));
+
+ return sc->sc_tty;
+}
+
+static void
+exynos_uart_stop(struct tty *tp, int flag)
+{
+}
+
+static void
+exynos_uart_start(struct tty *tp)
+{
+ struct exynos_uart_softc *sc = tp->t_sc;
+ u_char *p = sc->sc_buf;
+ int s, brem;
+
+ s = spltty();
+
+ if (tp->t_state & (TS_TTSTOP | TS_BUSY | TS_TIMEOUT)) {
+ splx(s);
+ return;
+ }
+ tp->t_state |= TS_BUSY;
+
+ splx(s);
+
+ for (brem = q_to_b(&tp->t_outq, sc->sc_buf, sizeof(sc->sc_buf));
+ brem > 0;
+ brem--, p++) {
+ while ((RD4(sc, SSCOM_UFSTAT) & UFSTAT_TXFULL) != 0)
+ ;
+
+ bus_space_write_1(sc->sc_bst, sc->sc_bsh,
+ SSCOM_UTXH, *p);
+ }
+
+ s = spltty();
+ tp->t_state &= ~TS_BUSY;
+ if (ttypull(tp)) {
+ tp->t_state |= TS_TIMEOUT;
+ callout_schedule(&tp->t_rstrt_ch, 1);
+ }
+ splx(s);
+}
+
+static int
+exynos_uart_param(struct tty *tp, struct termios *t)
+{
+ struct exynos_uart_softc *sc = tp->t_sc;
+
+ if (tp->t_ospeed == t->c_ospeed &&
+ tp->t_cflag == t->c_cflag)
+ return 0;
+
+ uint32_t ulcon = 0, ubrdiv;
+ switch (ISSET(t->c_cflag, CSIZE)) {
+ case CS5:
+ ulcon |= ULCON_LENGTH_5;
+ break;
+ case CS6:
+ ulcon |= ULCON_LENGTH_6;
+ break;
+ case CS7:
+ ulcon |= ULCON_LENGTH_7;
+ break;
+ case CS8:
+ ulcon |= ULCON_LENGTH_8;
+ break;
+ }
+ switch (ISSET(t->c_cflag, PARENB|PARODD)) {
+ case PARENB|PARODD:
+ ulcon |= ULCON_PARITY_ODD;
+ break;
+ case PARENB:
+ ulcon |= ULCON_PARITY_EVEN;
+ break;
+ default:
+ ulcon |= ULCON_PARITY_NONE;
+ break;
+ }
+ if (ISSET(t->c_cflag, CSTOPB))
+ ulcon |= ULCON_STOP;
+ WR4(sc, SSCOM_ULCON, ulcon);
+
+ ubrdiv = (sc->sc_freq / 16) / t->c_ospeed - 1;
+ WR4(sc, SSCOM_UBRDIV, ubrdiv);
+
+ tp->t_ispeed = t->c_ispeed;
+ tp->t_ospeed = t->c_ospeed;
+ tp->t_cflag = t->c_cflag;
+
+ return 0;
+}
+
+static int
+exynos_uart_intr(void *priv)
+{
+ struct exynos_uart_softc *sc = priv;
+ struct tty *tp = sc->sc_tty;
+ uint32_t uintp, uerstat, ufstat, c;
+
+ uintp = RD4(sc, SSCOM_UINTP);
+
+ for (;;) {
+ int cn_trapped = 0;
+
+ uerstat = RD4(sc, SSCOM_UERSTAT);
+ if (uerstat & UERSTAT_BREAK) {
+ cn_check_magic(tp->t_dev, CNC_BREAK,
+ exynos_uart_cnm_state);
+ if (cn_trapped)
+ continue;
+ }
+
+ ufstat = RD4(sc, SSCOM_UFSTAT);
+ if (__SHIFTOUT(ufstat, UFSTAT_RXCOUNT) == 0) {
+ break;
+ }
+
+ c = bus_space_read_1(sc->sc_bst, sc->sc_bsh, SSCOM_URXH);
+ cn_check_magic(tp->t_dev, c & 0xff, exynos_uart_cnm_state);
+ if (cn_trapped)
+ continue;
+ tp->t_linesw->l_rint(c & 0xff, tp);
+ }
+
+ WR4(sc, SSCOM_UINTP, uintp);
+
+ return 1;
+}
+
+/*
+ * Console support
+ */
+
+static int
+exynos_uart_console_match(int phandle)
+{
+ return of_match_compatible(phandle, compatible);
+}
+
+static void
+exynos_uart_console_consinit(struct fdt_attach_args *faa, u_int uart_freq)
+{
+ const int phandle = faa->faa_phandle;
+ bus_space_tag_t bst = faa->faa_bst;
+ bus_space_handle_t bsh;
+ bus_addr_t addr;
+ bus_size_t size;
+ tcflag_t flags;
+ int speed;
+
+ speed = fdtbus_get_stdout_speed();
+ if (speed < 0)
+ speed = 115200; /* default */
+ flags = fdtbus_get_stdout_flags();
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0)
+ panic("exynos_uart: couldn't get registers");
+ if (bus_space_map(bst, addr, size, 0, &bsh) != 0)
+ panic("exynos_uart: couldn't map registers");
+
+ exynos_uart_consaddr = addr;
+
+ exynos_uart_cnattach(bst, bsh, speed, flags);
+}
+
+static const struct fdt_console exynos_uart_console = {
+ .match = exynos_uart_console_match,
+ .consinit = exynos_uart_console_consinit,
+};
+
+FDT_CONSOLE(exynos_uart, &exynos_uart_console);
