Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/marvell/amb_adec.c b/drivers/marvell/amb_adec.c
new file mode 100644
index 0000000..d78fa25
--- /dev/null
+++ b/drivers/marvell/amb_adec.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+/* AXI to M-Bridge decoding unit driver for Marvell Armada 8K and 8K+ SoCs */
+
+#include <inttypes.h>
+#include <stdint.h>
+
+#include <common/debug.h>
+#include <lib/mmio.h>
+
+#include <armada_common.h>
+#include <mvebu.h>
+#include <mvebu_def.h>
+
+#if LOG_LEVEL >= LOG_LEVEL_INFO
+#define DEBUG_ADDR_MAP
+#endif
+
+/* common defines */
+#define WIN_ENABLE_BIT			(0x1)
+
+#define MVEBU_AMB_ADEC_OFFSET		(0x70ff00)
+
+#define AMB_WIN_CR_OFFSET(win)		(amb_base + 0x0 + (0x8 * win))
+#define AMB_ATTR_OFFSET			8
+#define AMB_ATTR_MASK			0xFF
+#define AMB_SIZE_OFFSET			16
+#define AMB_SIZE_MASK			0xFF
+
+#define AMB_WIN_BASE_OFFSET(win)	(amb_base + 0x4 + (0x8 * win))
+#define AMB_BASE_OFFSET			16
+#define AMB_BASE_ADDR_MASK		((1 << (32 - AMB_BASE_OFFSET)) - 1)
+
+#define AMB_WIN_ALIGNMENT_64K		(0x10000)
+#define AMB_WIN_ALIGNMENT_1M		(0x100000)
+
+uintptr_t amb_base;
+
+static void amb_check_win(struct addr_map_win *win, uint32_t win_num)
+{
+	uint32_t base_addr;
+
+	/* make sure the base address is in 16-bit range */
+	if (win->base_addr > AMB_BASE_ADDR_MASK) {
+		WARN("Window %d: base address is too big 0x%" PRIx64 "\n",
+		       win_num, win->base_addr);
+		win->base_addr = AMB_BASE_ADDR_MASK;
+		WARN("Set the base address to 0x%" PRIx64 "\n", win->base_addr);
+	}
+
+	base_addr  = win->base_addr << AMB_BASE_OFFSET;
+	/* for AMB The base is always 1M aligned */
+	/* check if address is aligned to 1M */
+	if (IS_NOT_ALIGN(base_addr, AMB_WIN_ALIGNMENT_1M)) {
+		win->base_addr = ALIGN_UP(base_addr, AMB_WIN_ALIGNMENT_1M);
+		WARN("Window %d: base address unaligned to 0x%x\n",
+		       win_num, AMB_WIN_ALIGNMENT_1M);
+		WARN("Align up the base address to 0x%" PRIx64 "\n", win->base_addr);
+	}
+
+	/* size parameter validity check */
+	if (!IS_POWER_OF_2(win->win_size)) {
+		WARN("Window %d: window size is not power of 2 (0x%" PRIx64 ")\n",
+		       win_num, win->win_size);
+		win->win_size = ROUND_UP_TO_POW_OF_2(win->win_size);
+		WARN("Rounding size to 0x%" PRIx64 "\n", win->win_size);
+	}
+}
+
+static void amb_enable_win(struct addr_map_win *win, uint32_t win_num)
+{
+	uint32_t ctrl, base, size;
+
+	/*
+	 * size is 64KB granularity.
+	 * The number of ones specifies the size of the
+	 * window in 64 KB granularity. 0 is 64KB
+	 */
+	size = (win->win_size / AMB_WIN_ALIGNMENT_64K) - 1;
+	ctrl = (size << AMB_SIZE_OFFSET) | (win->target_id << AMB_ATTR_OFFSET);
+	base = win->base_addr << AMB_BASE_OFFSET;
+
+	mmio_write_32(AMB_WIN_BASE_OFFSET(win_num), base);
+	mmio_write_32(AMB_WIN_CR_OFFSET(win_num), ctrl);
+
+	/* enable window after configuring window size (and attributes) */
+	ctrl |= WIN_ENABLE_BIT;
+	mmio_write_32(AMB_WIN_CR_OFFSET(win_num), ctrl);
+}
+
+#ifdef DEBUG_ADDR_MAP
+static void dump_amb_adec(void)
+{
+	uint32_t ctrl, base, win_id, attr;
+	uint32_t size, size_count;
+
+	/* Dump all AMB windows */
+	printf("bank  attribute     base          size\n");
+	printf("--------------------------------------------\n");
+	for (win_id = 0; win_id < AMB_MAX_WIN_ID; win_id++) {
+		ctrl = mmio_read_32(AMB_WIN_CR_OFFSET(win_id));
+		if (ctrl & WIN_ENABLE_BIT) {
+			base = mmio_read_32(AMB_WIN_BASE_OFFSET(win_id));
+			attr = (ctrl >> AMB_ATTR_OFFSET) & AMB_ATTR_MASK;
+			size_count = (ctrl >> AMB_SIZE_OFFSET) & AMB_SIZE_MASK;
+			size = (size_count + 1) * AMB_WIN_ALIGNMENT_64K;
+			printf("amb   0x%04x        0x%08x    0x%08x\n",
+			       attr, base, size);
+		}
+	}
+}
+#endif
+
+int init_amb_adec(uintptr_t base)
+{
+	struct addr_map_win *win;
+	uint32_t win_id, win_reg;
+	uint32_t win_count;
+
+	INFO("Initializing AXI to MBus Bridge Address decoding\n");
+
+	/* Get the base address of the AMB address decoding */
+	amb_base = base + MVEBU_AMB_ADEC_OFFSET;
+
+	/* Get the array of the windows and its size */
+	marvell_get_amb_memory_map(&win, &win_count, base);
+	if (win_count <= 0)
+		INFO("no windows configurations found\n");
+
+	if (win_count > AMB_MAX_WIN_ID) {
+		INFO("number of windows is bigger than %d\n", AMB_MAX_WIN_ID);
+		return 0;
+	}
+
+	/* disable all AMB windows */
+	for (win_id = 0; win_id < AMB_MAX_WIN_ID; win_id++) {
+		win_reg = mmio_read_32(AMB_WIN_CR_OFFSET(win_id));
+		win_reg &= ~WIN_ENABLE_BIT;
+		mmio_write_32(AMB_WIN_CR_OFFSET(win_id), win_reg);
+	}
+
+	/* enable relevant windows */
+	for (win_id = 0; win_id < win_count; win_id++, win++) {
+		amb_check_win(win, win_id);
+		amb_enable_win(win, win_id);
+	}
+
+#ifdef DEBUG_ADDR_MAP
+	dump_amb_adec();
+#endif
+
+	INFO("Done AXI to MBus Bridge Address decoding Initializing\n");
+
+	return 0;
+}