From 0361c7e504b1fa3c2901643088e2f29c0354ab31 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 1 Apr 2022 15:58:09 +0200 Subject: [PATCH] ARM: ep93xx: multiplatform support With the clock support and the interrupts out of the way, ep93xx can be compiled into the same kernel image as the other ARMv4/v5 platforms. The last obstacle are the two workarounds for broken boot loaders that require us to re-initialize the ethernet controller and/or the watchdog on certain machines. Move this code into the decompressor sources directly, checking for each possibly affected machine individually. Signed-off-by: Arnd Bergmann --- arch/arm/Kconfig | 16 ----- .../uncompress.h => boot/compressed/misc-ep93xx.h} | 69 +++++++++++----------- arch/arm/boot/compressed/misc.c | 4 ++ arch/arm/configs/ep93xx_defconfig | 2 + arch/arm/mach-ep93xx/Kconfig | 12 ++++ 5 files changed, 51 insertions(+), 52 deletions(-) rename arch/arm/{mach-ep93xx/include/mach/uncompress.h => boot/compressed/misc-ep93xx.h} (51%) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5177e54..2bd611b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -347,22 +347,6 @@ config ARCH_MULTIPLATFORM select SPARSE_IRQ select USE_OF -config ARCH_EP93XX - bool "EP93xx-based" - select ARCH_SPARSEMEM_ENABLE - select ARM_AMBA - imply ARM_PATCH_PHYS_VIRT - select ARM_VIC - select AUTO_ZRELADDR - select CLKSRC_MMIO - select CPU_ARM920T - select GPIOLIB - select COMMON_CLK - select IRQ_DOMAIN - select SPARSE_IRQ - help - This enables support for the Cirrus EP93xx series of CPUs. - config ARCH_FOOTBRIDGE bool "FootBridge" select CPU_SA110 diff --git a/arch/arm/mach-ep93xx/include/mach/uncompress.h b/arch/arm/boot/compressed/misc-ep93xx.h similarity index 51% rename from arch/arm/mach-ep93xx/include/mach/uncompress.h rename to arch/arm/boot/compressed/misc-ep93xx.h index e20bcab..3dc9425 100644 --- a/arch/arm/mach-ep93xx/include/mach/uncompress.h +++ b/arch/arm/boot/compressed/misc-ep93xx.h @@ -1,54 +1,25 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ /* - * arch/arm/mach-ep93xx/include/mach/uncompress.h - * * Copyright (C) 2006 Lennert Buytenhek */ #include -static unsigned char __raw_readb(unsigned int ptr) -{ - return *((volatile unsigned char *)ptr); -} - -static unsigned int __raw_readl(unsigned int ptr) +static inline unsigned int __raw_readl(unsigned int ptr) { return *((volatile unsigned int *)ptr); } -static void __raw_writeb(unsigned char value, unsigned int ptr) +static inline void __raw_writeb(unsigned char value, unsigned int ptr) { *((volatile unsigned char *)ptr) = value; } -static void __raw_writel(unsigned int value, unsigned int ptr) +static inline void __raw_writel(unsigned int value, unsigned int ptr) { *((volatile unsigned int *)ptr) = value; } -#define PHYS_UART_DATA (CONFIG_DEBUG_UART_PHYS + 0x00) -#define PHYS_UART_FLAG (CONFIG_DEBUG_UART_PHYS + 0x18) -#define UART_FLAG_TXFF 0x20 - -static inline void putc(int c) -{ - int i; - - for (i = 0; i < 10000; i++) { - /* Transmit fifo not full? */ - if (!(__raw_readb(PHYS_UART_FLAG) & UART_FLAG_TXFF)) - break; - } - - __raw_writeb(c, PHYS_UART_DATA); -} - -static inline void flush(void) -{ -} - - /* * Some bootloaders don't turn off DMA from the ethernet MAC before * jumping to linux, which means that we might end up with bits of RX @@ -58,7 +29,7 @@ static inline void flush(void) #define PHYS_ETH_SELF_CTL 0x80010020 #define ETH_SELF_CTL_RESET 0x00000001 -static void ethernet_reset(void) +static inline void ep93xx_ethernet_reset(void) { unsigned int v; @@ -75,15 +46,41 @@ static void ethernet_reset(void) #define TS72XX_WDT_FEED_PHYS_BASE 0x23c00000 #define TS72XX_WDT_FEED_VAL 0x05 -static void __maybe_unused ts72xx_watchdog_disable(void) +static inline void __maybe_unused ts72xx_watchdog_disable(void) { __raw_writeb(TS72XX_WDT_FEED_VAL, TS72XX_WDT_FEED_PHYS_BASE); __raw_writeb(0, TS72XX_WDT_CONTROL_PHYS_BASE); } -static void arch_decomp_setup(void) +static inline void ep93xx_decomp_setup(void) { if (machine_is_ts72xx()) ts72xx_watchdog_disable(); - ethernet_reset(); + + if (machine_is_adssphere() || + machine_is_edb9301() || + machine_is_edb9302() || + machine_is_edb9302a() || + machine_is_edb9302a() || + machine_is_edb9307() || + machine_is_edb9307a() || + machine_is_edb9307a() || + machine_is_edb9312() || + machine_is_edb9315() || + machine_is_edb9315a() || + machine_is_edb9315a() || + machine_is_gesbc9312() || + machine_is_micro9() || + machine_is_micro9l() || + machine_is_micro9m() || + machine_is_micro9s() || + machine_is_micro9m() || + machine_is_micro9l() || + machine_is_micro9s() || + machine_is_sim_one() || + machine_is_snapper_cl15() || + machine_is_ts72xx() || + machine_is_bk3() || + machine_is_vision_ep9307()) + ep93xx_ethernet_reset(); } diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index c3c66ff..cb2e069 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -23,6 +23,7 @@ unsigned int __machine_arch_type; #include #include #include "misc.h" +#include "misc-ep93xx.h" static void putstr(const char *ptr); @@ -143,6 +144,9 @@ decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, free_mem_end_ptr = free_mem_ptr_end_p; __machine_arch_type = arch_id; +#ifdef CONFIG_ARCH_EP93XX + ep93xx_decomp_setup(); +#endif arch_decomp_setup(); putstr("Uncompressing Linux..."); diff --git a/arch/arm/configs/ep93xx_defconfig b/arch/arm/configs/ep93xx_defconfig index 88d5ecc..fef802b 100644 --- a/arch/arm/configs/ep93xx_defconfig +++ b/arch/arm/configs/ep93xx_defconfig @@ -11,6 +11,8 @@ CONFIG_MODULE_UNLOAD=y CONFIG_MODULE_FORCE_UNLOAD=y # CONFIG_BLK_DEV_BSG is not set CONFIG_PARTITION_ADVANCED=y +CONFIG_ARCH_MULTI_V4T=y +# CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_EP93XX=y CONFIG_MACH_ADSSPHERE=y CONFIG_MACH_EDB9301=y diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig index 15c68a6..aa502ab 100644 --- a/arch/arm/mach-ep93xx/Kconfig +++ b/arch/arm/mach-ep93xx/Kconfig @@ -1,4 +1,16 @@ # SPDX-License-Identifier: GPL-2.0-only +menuconfig ARCH_EP93XX + bool "EP93xx-based" + depends on ARCH_MULTI_V4T + select ARCH_SPARSEMEM_ENABLE + select ARM_AMBA + select ARM_VIC + select CLKSRC_MMIO + select CPU_ARM920T + select GPIOLIB + help + This enables support for the Cirrus EP93xx series of CPUs. + if ARCH_EP93XX menu "Cirrus EP93xx Implementation Options" -- 2.7.4