c60128ce97
The debug definitions were missing for MACH_JZ4770, resulting in a build
failure when DEBUG_ZBOOT was set.
Since the UART addresses are the same across all Ingenic SoCs, we just
use a #ifdef CONFIG_MACH_INGENIC instead of checking for individual
Ingenic SoCs.
Additionally, I added a #define for the UART0 address in-code and
dropped the <asm/mach-jz4740/base.h> include, for the reason that this
include file is slowly being phased out as the whole platform is being
moved to devicetree.
Fixes: 9be5f3e92e ("MIPS: ingenic: Initial JZ4770 support")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.16
Patchwork: https://patchwork.linux-mips.org/patch/18957/
Signed-off-by: James Hogan <jhogan@kernel.org>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* 16550 compatible uart based serial debug support for zboot
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*/
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#include <linux/types.h>
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#include <linux/serial_reg.h>
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#include <asm/addrspace.h>
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#if defined(CONFIG_MACH_LOONGSON64) || defined(CONFIG_MIPS_MALTA)
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#define UART_BASE 0x1fd003f8
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#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
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#endif
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#ifdef CONFIG_AR7
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#include <ar7.h>
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#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
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#endif
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#ifdef CONFIG_MACH_INGENIC
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#define INGENIC_UART0_BASE_ADDR 0x10030000
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#define PORT(offset) (CKSEG1ADDR(INGENIC_UART0_BASE_ADDR) + (4 * offset))
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#endif
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#ifdef CONFIG_CPU_XLR
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#define UART0_BASE 0x1EF14000
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#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
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#define IOTYPE unsigned int
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#endif
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#ifdef CONFIG_CPU_XLP
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#define UART0_BASE 0x18030100
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#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
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#define IOTYPE unsigned int
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#endif
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#ifndef IOTYPE
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#define IOTYPE char
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#endif
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#ifndef PORT
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#error please define the serial port address for your own machine
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#endif
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static inline unsigned int serial_in(int offset)
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{
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return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
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}
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static inline void serial_out(int offset, int value)
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{
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*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
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}
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void putc(char c)
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{
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int timeout = 1000000;
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while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
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;
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serial_out(UART_TX, c);
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}
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