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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/boot/compressed/misc-ep93xx.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/boot/compressed/misc-ep93xx.h')
-rw-r--r--arch/arm/boot/compressed/misc-ep93xx.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/misc-ep93xx.h b/arch/arm/boot/compressed/misc-ep93xx.h
new file mode 100644
index 000000000..3dc942589
--- /dev/null
+++ b/arch/arm/boot/compressed/misc-ep93xx.h
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ */
+
+#include <asm/mach-types.h>
+
+static inline unsigned int __raw_readl(unsigned int ptr)
+{
+ return *((volatile unsigned int *)ptr);
+}
+
+static inline void __raw_writeb(unsigned char value, unsigned int ptr)
+{
+ *((volatile unsigned char *)ptr) = value;
+}
+
+static inline void __raw_writel(unsigned int value, unsigned int ptr)
+{
+ *((volatile unsigned int *)ptr) = value;
+}
+
+/*
+ * 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
+ * status and packet data scribbled over the uncompressed kernel image.
+ * Work around this by resetting the ethernet MAC before we uncompress.
+ */
+#define PHYS_ETH_SELF_CTL 0x80010020
+#define ETH_SELF_CTL_RESET 0x00000001
+
+static inline void ep93xx_ethernet_reset(void)
+{
+ unsigned int v;
+
+ /* Reset the ethernet MAC. */
+ v = __raw_readl(PHYS_ETH_SELF_CTL);
+ __raw_writel(v | ETH_SELF_CTL_RESET, PHYS_ETH_SELF_CTL);
+
+ /* Wait for reset to finish. */
+ while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET)
+ ;
+}
+
+#define TS72XX_WDT_CONTROL_PHYS_BASE 0x23800000
+#define TS72XX_WDT_FEED_PHYS_BASE 0x23c00000
+#define TS72XX_WDT_FEED_VAL 0x05
+
+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 inline void ep93xx_decomp_setup(void)
+{
+ if (machine_is_ts72xx())
+ ts72xx_watchdog_disable();
+
+ 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();
+}