[PATCH v4 2/6] rpi5: Use devicetree as alternative way to read IO base addresses
Ivan T. Ivanov
iivanov at suse.de
Wed Jan 10 13:29:04 CET 2024
From: Dmitry Malkin <dmitry at bedrocksystems.com>
MBOX and Watchdog on RPi5/bcm2712 has a different base IO offsets.
Find them via devicetree blob passed by bootloader.
Signed-off-by: Dmitry Malkin <dmitry at bedrocksystems.com>
Reviewed-by: Matthias Brugger <mbrugger at suse.com>
Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
---
arch/arm/mach-bcm283x/include/mach/base.h | 5 ++-
arch/arm/mach-bcm283x/include/mach/mbox.h | 3 +-
arch/arm/mach-bcm283x/include/mach/sdhci.h | 3 +-
arch/arm/mach-bcm283x/include/mach/timer.h | 3 +-
arch/arm/mach-bcm283x/include/mach/wdog.h | 3 +-
arch/arm/mach-bcm283x/init.c | 43 ++++++++++++++++++----
6 files changed, 43 insertions(+), 17 deletions(-)
diff --git a/arch/arm/mach-bcm283x/include/mach/base.h b/arch/arm/mach-bcm283x/include/mach/base.h
index 4ccaf69693..6de99e7ea1 100644
--- a/arch/arm/mach-bcm283x/include/mach/base.h
+++ b/arch/arm/mach-bcm283x/include/mach/base.h
@@ -6,7 +6,10 @@
#ifndef _BCM283x_BASE_H_
#define _BCM283x_BASE_H_
-extern unsigned long rpi_bcm283x_base;
+extern unsigned long rpi_mbox_base;
+extern unsigned long rpi_timer_base;
+extern unsigned long rpi_sdhci_base;
+extern unsigned long rpi_wdog_base;
#ifdef CONFIG_ARMV7_LPAE
#ifdef CONFIG_TARGET_RPI_4_32B
diff --git a/arch/arm/mach-bcm283x/include/mach/mbox.h b/arch/arm/mach-bcm283x/include/mach/mbox.h
index 490664f878..35d4e2f075 100644
--- a/arch/arm/mach-bcm283x/include/mach/mbox.h
+++ b/arch/arm/mach-bcm283x/include/mach/mbox.h
@@ -38,8 +38,7 @@
/* Raw mailbox HW */
-#define BCM2835_MBOX_PHYSADDR ({ BUG_ON(!rpi_bcm283x_base); \
- rpi_bcm283x_base + 0x0000b880; })
+#define BCM2835_MBOX_PHYSADDR rpi_mbox_base
struct bcm2835_mbox_regs {
u32 read;
diff --git a/arch/arm/mach-bcm283x/include/mach/sdhci.h b/arch/arm/mach-bcm283x/include/mach/sdhci.h
index 7323690687..e837c679c4 100644
--- a/arch/arm/mach-bcm283x/include/mach/sdhci.h
+++ b/arch/arm/mach-bcm283x/include/mach/sdhci.h
@@ -8,8 +8,7 @@
#include <asm/arch/base.h>
-#define BCM2835_SDHCI_PHYSADDR ({ BUG_ON(!rpi_bcm283x_base); \
- rpi_bcm283x_base + 0x00300000; })
+#define BCM2835_SDHCI_PHYSADDR rpi_sdhci_base
int bcm2835_sdhci_init(u32 regbase, u32 emmc_freq);
diff --git a/arch/arm/mach-bcm283x/include/mach/timer.h b/arch/arm/mach-bcm283x/include/mach/timer.h
index 5567dbd7f3..60500a256d 100644
--- a/arch/arm/mach-bcm283x/include/mach/timer.h
+++ b/arch/arm/mach-bcm283x/include/mach/timer.h
@@ -11,8 +11,7 @@
#include <linux/bug.h>
#endif
-#define BCM2835_TIMER_PHYSADDR ({ BUG_ON(!rpi_bcm283x_base); \
- rpi_bcm283x_base + 0x00003000; })
+#define BCM2835_TIMER_PHYSADDR rpi_timer_base
#define BCM2835_TIMER_CS_M3 (1 << 3)
#define BCM2835_TIMER_CS_M2 (1 << 2)
diff --git a/arch/arm/mach-bcm283x/include/mach/wdog.h b/arch/arm/mach-bcm283x/include/mach/wdog.h
index 9942666720..b950560674 100644
--- a/arch/arm/mach-bcm283x/include/mach/wdog.h
+++ b/arch/arm/mach-bcm283x/include/mach/wdog.h
@@ -8,8 +8,7 @@
#include <asm/arch/base.h>
-#define BCM2835_WDOG_PHYSADDR ({ BUG_ON(!rpi_bcm283x_base); \
- rpi_bcm283x_base + 0x00100000; })
+#define BCM2835_WDOG_PHYSADDR rpi_wdog_base
struct bcm2835_wdog_regs {
u32 unknown0[7];
diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
index f1a0c8588d..016bc1eb41 100644
--- a/arch/arm/mach-bcm283x/init.c
+++ b/arch/arm/mach-bcm283x/init.c
@@ -146,7 +146,11 @@ static void rpi_update_mem_map(void)
static void rpi_update_mem_map(void) {}
#endif
-unsigned long rpi_bcm283x_base = 0x3f000000;
+/* Default bcm283x devices addresses */
+unsigned long rpi_mbox_base = 0x3f00b880;
+unsigned long rpi_sdhci_base = 0x3f300000;
+unsigned long rpi_wdog_base = 0x3f100000;
+unsigned long rpi_timer_base = 0x3f003000;
int arch_cpu_init(void)
{
@@ -157,22 +161,45 @@ int arch_cpu_init(void)
int mach_cpu_init(void)
{
- int ret, soc_offset;
+ int ret, soc, offset;
u64 io_base, size;
rpi_update_mem_map();
/* Get IO base from device tree */
- soc_offset = fdt_path_offset(gd->fdt_blob, "/soc");
- if (soc_offset < 0)
- return soc_offset;
+ soc = fdt_path_offset(gd->fdt_blob, "/soc");
+ if (soc < 0)
+ return soc;
- ret = fdt_read_range((void *)gd->fdt_blob, soc_offset, 0, NULL,
- &io_base, &size);
+ ret = fdt_read_range((void *)gd->fdt_blob, soc, 0, NULL,
+ &io_base, &size);
if (ret)
return ret;
- rpi_bcm283x_base = io_base;
+ rpi_mbox_base = io_base + 0x00b880;
+ rpi_sdhci_base = io_base + 0x300000;
+ rpi_wdog_base = io_base + 0x100000;
+ rpi_timer_base = io_base + 0x003000;
+
+ offset = fdt_node_offset_by_compatible(gd->fdt_blob, soc,
+ "brcm,bcm2835-mbox");
+ if (offset > soc)
+ rpi_mbox_base = fdt_get_base_address(gd->fdt_blob, offset);
+
+ offset = fdt_node_offset_by_compatible(gd->fdt_blob, soc,
+ "brcm,bcm2835-sdhci");
+ if (offset > soc)
+ rpi_sdhci_base = fdt_get_base_address(gd->fdt_blob, offset);
+
+ offset = fdt_node_offset_by_compatible(gd->fdt_blob, soc,
+ "brcm,bcm2835-system-timer");
+ if (offset > soc)
+ rpi_timer_base = fdt_get_base_address(gd->fdt_blob, offset);
+
+ offset = fdt_node_offset_by_compatible(gd->fdt_blob, soc,
+ "brcm,bcm2712-pm");
+ if (offset > soc)
+ rpi_wdog_base = fdt_get_base_address(gd->fdt_blob, offset);
return 0;
}
--
2.35.3
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