[U-Boot] [RFC PATCH v1 5/7] ARM: kirkwood: switch to using mvebu mbus

[Chris Packham]

The mvebu mbus code already had most of the support required for
kirkwood. The only difference is that unlike the other mvebu targets
kirkwood doesn't have a bridge control block so the code related to
managing that needs to be compiled out.

Signed-off-by: Chris Packham <judge.packham at gmail.com>
---

 arch/arm/mach-kirkwood/cpu.c              | 33 ++++++++++++++++++++---
 arch/arm/mach-kirkwood/include/mach/cpu.h | 11 ++++++++
 arch/arm/mach-mvebu/Makefile              |  1 +
 arch/arm/mach-mvebu/mbus.c                |  6 +++++
 4 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-kirkwood/cpu.c b/arch/arm/mach-kirkwood/cpu.c
index 95dd07f840ca..009b49287b7f 100644
--- a/arch/arm/mach-kirkwood/cpu.c
+++ b/arch/arm/mach-kirkwood/cpu.c
@@ -110,6 +110,32 @@ int kw_config_adr_windows(void)
 	return 0;
 }
 
+static struct mbus_win windows[] = {
+	/* Window 0: PCIE MEM address space */
+	{ KW_DEFADR_PCI_MEM, 1024 * 1024 * 256,
+	  KWCPU_TARGET_PCIE, KWCPU_ATTR_PCIE_MEM },
+
+	/* Window 1: PCIE IO address space */
+	{ KW_DEFADR_PCI_IO, 1024 * 64,
+	  KWCPU_TARGET_PCIE, KWCPU_ATTR_PCIE_IO },
+
+	/* Window 2: NAND Flash address space */
+	{ KW_DEFADR_NANDF, 1024 * 1024 * 128,
+	  KWCPU_TARGET_MEMORY, KWCPU_ATTR_NANDFLASH },
+
+	/* Window 3: SPI Flash address space */
+	{ KW_DEFADR_SPIF, 1024 * 1024 * 128,
+	  KWCPU_TARGET_MEMORY, KWCPU_ATTR_SPIFLASH },
+
+	/* Window 4: BOOT Memory address space */
+	{ KW_DEFADR_BOOTROM, 1024 * 1024 * 128,
+	  KWCPU_TARGET_MEMORY, KWCPU_ATTR_BOOTROM },
+
+	/* Window 5: Security SRAM address space */
+	{ KW_DEFADR_SASRAM, 1024 * 64,
+	  KWCPU_TARGET_SASRAM, KWCPU_ATTR_SASRAM },
+};
+
 /*
  * SYSRSTn Duration Counter Support
  *
@@ -221,15 +247,13 @@ int arch_cpu_init(void)
 	struct kwcpu_registers *cpureg =
 		(struct kwcpu_registers *)KW_CPU_REG_BASE;
 
-	/* Linux expects` the internal registers to be at 0xf1000000 */
+	/* Linux expects the internal registers to be at 0xf1000000 */
 	writel(KW_REGS_PHY_BASE, KW_OFFSET_REG);
 
 	/* Enable and invalidate L2 cache in write through mode */
 	writel(readl(&cpureg->l2_cfg) | 0x18, &cpureg->l2_cfg);
 	invalidate_l2_cache();
 
-	kw_config_adr_windows();
-
 #ifdef CONFIG_KIRKWOOD_RGMII_PAD_1V8
 	/*
 	 * Configures the I/O voltage of the pads connected to Egigabit
@@ -296,6 +320,9 @@ int arch_misc_init(void)
 	temp = get_cr();
 	set_cr(temp & ~CR_V);
 
+	/* Configure mbus windows */
+	mvebu_mbus_probe(windows, ARRAY_SIZE(windows));
+
 	/* checks and execute resset to factory event */
 	kw_sysrst_check();
 
diff --git a/arch/arm/mach-kirkwood/include/mach/cpu.h b/arch/arm/mach-kirkwood/include/mach/cpu.h
index c35cace844ae..3d6b15568a8a 100644
--- a/arch/arm/mach-kirkwood/include/mach/cpu.h
+++ b/arch/arm/mach-kirkwood/include/mach/cpu.h
@@ -68,6 +68,13 @@ enum kwcpu_attrib {
 #define KW_DEFADR_SPIF		0xE8000000
 #define KW_DEFADR_BOOTROM	0xF8000000
 
+struct mbus_win {
+	u32 base;
+	u32 size;
+	u8 target;
+	u8 attr;
+};
+
 /*
  * read feroceon/sheeva core extra feature register
  * using co-proc instruction
@@ -134,6 +141,9 @@ struct kwgpio_registers {
 	u32 irq_level;
 };
 
+/* Needed for dynamic (board-specific) mbus configuration */
+extern struct mvebu_mbus_state mbus_state;
+
 /*
  * functions
  */
@@ -141,6 +151,7 @@ unsigned int mvebu_sdram_bar(enum memory_bank bank);
 unsigned int mvebu_sdram_bs(enum memory_bank bank);
 void mvebu_sdram_size_adjust(enum memory_bank bank);
 int kw_config_adr_windows(void);
+int mvebu_mbus_probe(struct mbus_win windows[], int count);
 void mvebu_config_gpio(unsigned int gpp0_oe_val, unsigned int gpp1_oe_val,
 		unsigned int gpp0_oe, unsigned int gpp1_oe);
 int kw_config_mpp(unsigned int mpp0_7, unsigned int mpp8_15,
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index ee2eca913484..c0274a6f09aa 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -14,6 +14,7 @@ ifdef CONFIG_KIRKWOOD
 
 obj-y	= dram.o
 obj-y	+= gpio.o
+obj-y	+= mbus.o
 obj-y	+= timer.o
 
 else # CONFIG_KIRKWOOD
diff --git a/arch/arm/mach-mvebu/mbus.c b/arch/arm/mach-mvebu/mbus.c
index df4c5cb2d718..9b2c57348266 100644
--- a/arch/arm/mach-mvebu/mbus.c
+++ b/arch/arm/mach-mvebu/mbus.c
@@ -405,6 +405,7 @@ int mvebu_mbus_del_window(phys_addr_t base, size_t size)
 	return 0;
 }
 
+#ifndef CONFIG_KIRKWOOD
 static void mvebu_mbus_get_lowest_base(struct mvebu_mbus_state *mbus,
 				       phys_addr_t *base)
 {
@@ -428,7 +429,9 @@ static void mvebu_mbus_get_lowest_base(struct mvebu_mbus_state *mbus,
 			*base = wbase;
 	}
 }
+#endif
 
+#ifndef CONFIG_KIRKWOOD
 static void mvebu_config_mbus_bridge(struct mvebu_mbus_state *mbus)
 {
 	phys_addr_t base;
@@ -451,6 +454,7 @@ static void mvebu_config_mbus_bridge(struct mvebu_mbus_state *mbus)
 	val = (size / (64 << 10)) - 1;
 	writel((val << 16) | 0x1, MBUS_BRIDGE_WIN_CTRL_REG);
 }
+#endif
 
 int mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
 		      u32 base, u32 size, u8 target, u8 attr)
@@ -471,12 +475,14 @@ int mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
 			return -ENOMEM;
 	}
 
+#ifndef CONFIG_KIRKWOOD
 	/*
 	 * Re-configure the mbus bridge registers each time this function
 	 * is called. Since it may get called from the board code in
 	 * later boot stages as well.
 	 */
 	mvebu_config_mbus_bridge(mbus);
+#endif
 
 	return 0;
 }
-- 
2.19.2