mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 16:36:41 +07:00
a287453e37
Now putc writes to the first enabled internal UART. If there is none the external UART on the a9m9750dev board is used (if enabled). Otherwise there is no output. Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
165 lines
3.4 KiB
C
165 lines
3.4 KiB
C
/*
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* include/asm-arm/arch-ns9xxx/uncompress.h
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*
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* Copyright (C) 2006 by Digi International Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef __ASM_ARCH_UNCOMPRESS_H
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#define __ASM_ARCH_UNCOMPRESS_H
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#include <asm/io.h>
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#define __REG(x) ((void __iomem __force *)(x))
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static void putc_dummy(char c, void __iomem *base)
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{
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/* nothing */
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}
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static void putc_ns9360(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (__raw_readl(base + 8) & (1 << 3)) {
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__raw_writeb(c, base + 16);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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static void putc_a9m9750dev(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (__raw_readb(base + 5) & (1 << 5)) {
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__raw_writeb(c, base);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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static void putc_ns921x(char c, void __iomem *base)
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{
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static int t = 0x10000;
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do {
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if (t)
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--t;
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if (!(__raw_readl(base) & (1 << 11))) {
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__raw_writeb(c, base + 0x0028);
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t = 0x10000;
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break;
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}
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} while (t);
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}
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#define MSCS __REG(0xA0900184)
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#define NS9360_UARTA __REG(0x90200040)
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#define NS9360_UARTB __REG(0x90200000)
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#define NS9360_UARTC __REG(0x90300000)
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#define NS9360_UARTD __REG(0x90300040)
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#define NS9360_UART_ENABLED(base) \
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(__raw_readl(NS9360_UARTA) & (1 << 31))
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#define A9M9750DEV_UARTA __REG(0x40000000)
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#define NS921XSYS_CLOCK __REG(0xa090017c)
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#define NS921X_UARTA __REG(0x90010000)
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#define NS921X_UARTB __REG(0x90018000)
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#define NS921X_UARTC __REG(0x90020000)
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#define NS921X_UARTD __REG(0x90028000)
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#define NS921X_UART_ENABLED(base) \
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(__raw_readl((base) + 0x1000) & (1 << 29))
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static void autodetect(void (**putc)(char, void __iomem *), void __iomem **base)
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{
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if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x00) {
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/* ns9360 or ns9750 */
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if (NS9360_UART_ENABLED(NS9360_UARTA)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTA;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTB)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTB;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTC)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTC;
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return;
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} else if (NS9360_UART_ENABLED(NS9360_UARTD)) {
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*putc = putc_ns9360;
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*base = NS9360_UARTD;
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return;
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} else if (__raw_readl(__REG(0xa09001f4)) == 0xfffff001) {
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*putc = putc_a9m9750dev;
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*base = A9M9750DEV_UARTA;
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return;
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}
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} else if (((__raw_readl(MSCS) >> 16) & 0xfe) == 0x02) {
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/* ns921x */
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u32 clock = __raw_readl(NS921XSYS_CLOCK);
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if ((clock & (1 << 1)) &&
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NS921X_UART_ENABLED(NS921X_UARTA)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTA;
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return;
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} else if ((clock & (1 << 2)) &&
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NS921X_UART_ENABLED(NS921X_UARTB)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTB;
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return;
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} else if ((clock & (1 << 3)) &&
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NS921X_UART_ENABLED(NS921X_UARTC)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTC;
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return;
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} else if ((clock & (1 << 4)) &&
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NS921X_UART_ENABLED(NS921X_UARTD)) {
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*putc = putc_ns921x;
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*base = NS921X_UARTD;
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return;
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}
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}
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*putc = putc_dummy;
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}
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void (*myputc)(char, void __iomem *);
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void __iomem *base;
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static void putc(char c)
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{
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myputc(c, base);
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}
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static void arch_decomp_setup(void)
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{
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autodetect(&myputc, &base);
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}
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#define arch_decomp_wdog()
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static void flush(void)
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{
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/* nothing */
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}
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#endif /* ifndef __ASM_ARCH_UNCOMPRESS_H */
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