[PATCH 05/12] ARM: ep93xx: multiplatform support
From: Arnd Bergmann
Date: Tue Apr 05 2022 - 10:20:49 EST
From: Arnd Bergmann <arnd@xxxxxxxx>
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 <arnd@xxxxxxxx>
---
arch/arm/Kconfig | 16 -----
.../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 5177e54cc14c..2bd611beefe1 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 e20bcab702b2..3dc942589cba 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 <buytenh@xxxxxxxxxxxxxx>
*/
#include <asm/mach-types.h>
-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 c3c66ff2d696..cb2e069dc73f 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 <linux/types.h>
#include <linux/linkage.h>
#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 88d5ecc2121e..fef802b7af8c 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 15c68a646d51..aa502ab57404 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"
--
2.29.2