Merge tag 'arm-soc/for-4.9/soc' of http://github.com/Broadcom/stblinux into next/soc
Pull "Broadcom soc changes for 4.9" from Florian Fainelli:
This pull request contains Broadcom ARM-based SoC changes for 4.9, please pull
the following:
- Rafal adds preliminary support for the new BCM53573 Wi-Fi SoC based on a
single core Cortex A7 and re-using a bunch of iProc peripherals
- Florian adds support for earlyprintk on Broadcom STB/CM ARM-based chips by
reading the chip family_id value from a known location and deriving the UART
based address
* tag 'arm-soc/for-4.9/soc' of http://github.com/Broadcom/stblinux:
ARM: BCM53573: Initial support for Broadcom BCM53573 SoCs
ARM: brcmstb: Add earlyprintk support using run-time checks
diff --git a/MAINTAINERS b/MAINTAINERS
index 71aa5da..5689d6e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2574,6 +2574,13 @@
F: arch/arm/boot/dts/bcm5301x*.dtsi
F: arch/arm/boot/dts/bcm470*
+BROADCOM BCM53573 ARM ARCHITECTURE
+M: Rafał Miłecki <rafal@milecki.pl>
+L: linux-arm-kernel@lists.infradead.org
+S: Maintained
+F: arch/arm/boot/dts/bcm53573*
+F: arch/arm/boot/dts/bcm47189*
+
BROADCOM BCM63XX ARM ARCHITECTURE
M: Florian Fainelli <f.fainelli@gmail.com>
M: bcm-kernel-feedback-list@broadcom.com
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index a9693b6..a660508 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -186,10 +186,11 @@
config DEBUG_BRCMSTB_UART
bool "Use BRCMSTB UART for low-level debug"
depends on ARCH_BRCMSTB
- select DEBUG_UART_8250
help
Say Y here if you want the debug print routines to direct
- their output to the first serial port on these devices.
+ their output to the first serial port on these devices. The
+ UART physical and virtual address is automatically provided
+ based on the chip identification register value.
If you have a Broadcom STB chip and would like early print
messages to appear over the UART, select this option.
@@ -1430,6 +1431,7 @@
default "debug/zynq.S" if DEBUG_ZYNQ_UART0 || DEBUG_ZYNQ_UART1
default "debug/bcm63xx.S" if DEBUG_BCM63XX_UART
default "debug/digicolor.S" if DEBUG_DIGICOLOR_UA0
+ default "debug/brcmstb.S" if DEBUG_BRCMSTB_UART
default "mach/debug-macro.S"
# Compatibility options for PL01x
@@ -1520,7 +1522,6 @@
default 0xe6e60000 if DEBUG_RCAR_GEN2_SCIF0
default 0xe8008000 if DEBUG_R7S72100_SCIF2
default 0xf0000be0 if ARCH_EBSA110
- default 0xf040ab00 if DEBUG_BRCMSTB_UART
default 0xf1012000 if DEBUG_MVEBU_UART0_ALTERNATE
default 0xf1012100 if DEBUG_MVEBU_UART1_ALTERNATE
default 0xf7fc9000 if DEBUG_BERLIN_UART
@@ -1604,7 +1605,6 @@
default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
default 0xfb00c000 if DEBUG_AT91_SAMA5D4_USART3
default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
- default 0xfc40ab00 if DEBUG_BRCMSTB_UART
default 0xfc705000 if DEBUG_ZTE_ZX
default 0xfcfe8600 if DEBUG_BCM63XX_UART
default 0xfd000000 if DEBUG_SPEAR3XX || DEBUG_SPEAR13XX
@@ -1677,8 +1677,7 @@
DEBUG_ALPINE_UART0 || \
DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
DEBUG_DAVINCI_DA8XX_UART2 || \
- DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2 || \
- DEBUG_BRCMSTB_UART
+ DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2
config DEBUG_UART_8250_PALMCHIP
bool "8250 UART is Palmchip BK-310x"
@@ -1697,7 +1696,8 @@
bool
depends on ARCH_MULTIPLATFORM || PLAT_SAMSUNG || ARM_SINGLE_ARMV7M
default y if DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
- (!DEBUG_TEGRA_UART || !ZBOOT_ROM)
+ (!DEBUG_TEGRA_UART || !ZBOOT_ROM) && \
+ !DEBUG_BRCMSTB_UART
help
This option influences the normal decompressor output for
multiplatform kernels. Normally, multiplatform kernels disable
diff --git a/arch/arm/include/debug/brcmstb.S b/arch/arm/include/debug/brcmstb.S
new file mode 100644
index 0000000..9113d7b
--- /dev/null
+++ b/arch/arm/include/debug/brcmstb.S
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/serial_reg.h>
+
+/* Physical register offset and virtual register offset */
+#define REG_PHYS_BASE 0xf0000000
+#define REG_VIRT_BASE 0xfc000000
+#define REG_PHYS_ADDR(x) ((x) + REG_PHYS_BASE)
+
+/* Product id can be read from here */
+#define SUN_TOP_CTRL_BASE REG_PHYS_ADDR(0x404000)
+
+#define UARTA_3390 REG_PHYS_ADDR(0x40a900)
+#define UARTA_7250 REG_PHYS_ADDR(0x40b400)
+#define UARTA_7268 REG_PHYS_ADDR(0x40c000)
+#define UARTA_7271 UARTA_7268
+#define UARTA_7364 REG_PHYS_ADDR(0x40b000)
+#define UARTA_7366 UARTA_7364
+#define UARTA_74371 REG_PHYS_ADDR(0x406b00)
+#define UARTA_7439 REG_PHYS_ADDR(0x40a900)
+#define UARTA_7445 REG_PHYS_ADDR(0x40ab00)
+
+#define UART_SHIFT 2
+
+#define checkuart(rp, rv, family_id, family) \
+ /* Load family id */ \
+ ldr rp, =family_id ; \
+ /* Compare SUN_TOP_CTRL value against it */ \
+ cmp rp, rv ; \
+ /* Passed test, load address */ \
+ ldreq rp, =UARTA_##family ; \
+ /* Jump to save UART address */ \
+ beq 91f
+
+ .macro addruart, rp, rv, tmp
+ adr \rp, 99f @ actual addr of 99f
+ ldr \rv, [\rp] @ linked addr is stored there
+ sub \rv, \rv, \rp @ offset between the two
+ ldr \rp, [\rp, #4] @ linked brcmstb_uart_config
+ sub \tmp, \rp, \rv @ actual brcmstb_uart_config
+ ldr \rp, [\tmp] @ Load brcmstb_uart_config
+ cmp \rp, #1 @ needs initialization?
+ bne 100f @ no; go load the addresses
+ mov \rv, #0 @ yes; record init is done
+ str \rv, [\tmp]
+
+ /* Check SUN_TOP_CTRL base */
+ ldr \rp, =SUN_TOP_CTRL_BASE @ load SUN_TOP_CTRL PA
+ ldr \rv, [\rp, #0] @ get register contents
+ and \rv, \rv, #0xffffff00 @ strip revision bits [7:0]
+
+ /* Chip specific detection starts here */
+20: checkuart(\rp, \rv, 0x33900000, 3390)
+21: checkuart(\rp, \rv, 0x72500000, 7250)
+22: checkuart(\rp, \rv, 0x72680000, 7268)
+23: checkuart(\rp, \rv, 0x72710000, 7271)
+24: checkuart(\rp, \rv, 0x73640000, 7364)
+25: checkuart(\rp, \rv, 0x73660000, 7366)
+26: checkuart(\rp, \rv, 0x07437100, 74371)
+27: checkuart(\rp, \rv, 0x74390000, 7439)
+28: checkuart(\rp, \rv, 0x74450000, 7445)
+
+ /* No valid UART found */
+90: mov \rp, #0
+ /* fall through */
+
+ /* Record whichever UART we chose */
+91: str \rp, [\tmp, #4] @ Store in brcmstb_uart_phys
+ cmp \rp, #0 @ Valid UART address?
+ bne 92f @ Yes, go process it
+ str \rp, [\tmp, #8] @ Store 0 in brcmstb_uart_virt
+ b 100f @ Done
+92: and \rv, \rp, #0xffffff @ offset within 16MB section
+ add \rv, \rv, #REG_VIRT_BASE
+ str \rv, [\tmp, #8] @ Store in brcmstb_uart_virt
+ b 100f
+
+ .align
+99: .word .
+ .word brcmstb_uart_config
+ .ltorg
+
+ /* Load previously selected UART address */
+100: ldr \rp, [\tmp, #4] @ Load brcmstb_uart_phys
+ ldr \rv, [\tmp, #8] @ Load brcmstb_uart_virt
+ .endm
+
+ .macro store, rd, rx:vararg
+ str \rd, \rx
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldr \rd, \rx
+ .endm
+
+ .macro senduart,rd,rx
+ store \rd, [\rx, #UART_TX << UART_SHIFT]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+/*
+ * Storage for the state maintained by the macros above.
+ *
+ * In the kernel proper, this data is located in arch/arm/mach-bcm/brcmstb.c.
+ * That's because this header is included from multiple files, and we only
+ * want a single copy of the data. In particular, the UART probing code above
+ * assumes it's running using physical addresses. This is true when this file
+ * is included from head.o, but not when included from debug.o. So we need
+ * to share the probe results between the two copies, rather than having
+ * to re-run the probing again later.
+ *
+ * In the decompressor, we put the symbol/storage right here, since common.c
+ * isn't included in the decompressor build. This symbol gets put in .text
+ * even though it's really data, since .data is discarded from the
+ * decompressor. Luckily, .text is writeable in the decompressor, unless
+ * CONFIG_ZBOOT_ROM. That dependency is handled in arch/arm/Kconfig.debug.
+ */
+#if defined(ZIMAGE)
+brcmstb_uart_config:
+ /* Debug UART initialization required */
+ .word 1
+ /* Debug UART physical address */
+ .word 0
+ /* Debug UART virtual address */
+ .word 0
+#endif
diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 34f0fca..6a6302d 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -159,6 +159,20 @@
This enables support for the Broadcom BCM2835 and BCM2836 SoCs.
This SoC is used in the Raspberry Pi and Roku 2 devices.
+config ARCH_BCM_53573
+ bool "Broadcom BCM53573 SoC series support"
+ depends on ARCH_MULTI_V7
+ select ARCH_BCM_IPROC
+ select HAVE_ARM_ARCH_TIMER
+ help
+ BCM53573 series is set of SoCs using ARM Cortex-A7 CPUs with wireless
+ embedded in the chipset.
+ This SoC line is mostly used in home routers and is some cheaper
+ alternative for Northstar family.
+
+ The base chip is BCM53573 and there are some packaging modifications
+ like BCM47189 and BCM47452.
+
config ARCH_BCM_63XX
bool "Broadcom BCM63xx DSL SoC"
depends on ARCH_MULTI_V7
diff --git a/arch/arm/mach-bcm/brcmstb.c b/arch/arm/mach-bcm/brcmstb.c
index 99a67cf..07e3a86 100644
--- a/arch/arm/mach-bcm/brcmstb.c
+++ b/arch/arm/mach-bcm/brcmstb.c
@@ -19,6 +19,22 @@
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
+/*
+ * Storage for debug-macro.S's state.
+ *
+ * This must be in .data not .bss so that it gets initialized each time the
+ * kernel is loaded. The data is declared here rather than debug-macro.S so
+ * that multiple inclusions of debug-macro.S point at the same data.
+ */
+u32 brcmstb_uart_config[3] = {
+ /* Debug UART initialization required */
+ 1,
+ /* Debug UART physical address */
+ 0,
+ /* Debug UART virtual address */
+ 0,
+};
+
static void __init brcmstb_init_irq(void)
{
irqchip_init();