marvell: drivers: Add address decoding units drivers
Add address decoding unit drivers for Marvell SoCs.
Address decoding flow and address translation units chart
are located at docs/marvell/misc/mvebu-a8k-addr-map.txt
Change-Id: Id6ce311fa1f4f112df3adfac5d20449f495f71ed
Signed-off-by: Hanna Hawa <hannah@marvell.com>
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
diff --git a/drivers/marvell/io_win.c b/drivers/marvell/io_win.c
new file mode 100644
index 0000000..701dbb8
--- /dev/null
+++ b/drivers/marvell/io_win.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+/* IO Window unit device driver for Marvell AP807, AP807 and AP810 SoCs */
+
+#include <a8k_common.h>
+#include <debug.h>
+#include <io_win.h>
+#include <mmio.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)
+/* Physical address of the base of the window = {Addr[19:0],20`h0} */
+#define ADDRESS_SHIFT (20 - 4)
+#define ADDRESS_MASK (0xFFFFFFF0)
+#define IO_WIN_ALIGNMENT_1M (0x100000)
+#define IO_WIN_ALIGNMENT_64K (0x10000)
+
+/* AP registers */
+#define IO_WIN_ALR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0x0 + \
+ (0x10 * win))
+#define IO_WIN_AHR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0x8 + \
+ (0x10 * win))
+#define IO_WIN_CR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0xC + \
+ (0x10 * win))
+
+/* For storage of CR, ALR, AHR abd GCR */
+static uint32_t io_win_regs_save[MVEBU_IO_WIN_MAX_WINS * 3 + 1];
+
+static void io_win_check(struct addr_map_win *win)
+{
+ /* for IO The base is always 1M aligned */
+ /* check if address is aligned to 1M */
+ if (IS_NOT_ALIGN(win->base_addr, IO_WIN_ALIGNMENT_1M)) {
+ win->base_addr = ALIGN_UP(win->base_addr, IO_WIN_ALIGNMENT_1M);
+ NOTICE("%s: Align up the base address to 0x%llx\n",
+ __func__, win->base_addr);
+ }
+
+ /* size parameter validity check */
+ if (IS_NOT_ALIGN(win->win_size, IO_WIN_ALIGNMENT_1M)) {
+ win->win_size = ALIGN_UP(win->win_size, IO_WIN_ALIGNMENT_1M);
+ NOTICE("%s: Aligning size to 0x%llx\n",
+ __func__, win->win_size);
+ }
+}
+
+static void io_win_enable_window(int ap_index, struct addr_map_win *win,
+ uint32_t win_num)
+{
+ uint32_t alr, ahr;
+ uint64_t end_addr;
+
+ if (win->target_id < 0 || win->target_id >= MVEBU_IO_WIN_MAX_WINS) {
+ ERROR("target ID = %d, is invalid\n", win->target_id);
+ return;
+ }
+
+ if ((win_num == 0) || (win_num > MVEBU_IO_WIN_MAX_WINS)) {
+ ERROR("Enabling wrong IOW window %d!\n", win_num);
+ return;
+ }
+
+ /* calculate the end-address */
+ end_addr = (win->base_addr + win->win_size - 1);
+
+ alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
+ alr |= WIN_ENABLE_BIT;
+ ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
+
+ /* write start address and end address for IO window */
+ mmio_write_32(IO_WIN_ALR_OFFSET(ap_index, win_num), alr);
+ mmio_write_32(IO_WIN_AHR_OFFSET(ap_index, win_num), ahr);
+
+ /* write window target */
+ mmio_write_32(IO_WIN_CR_OFFSET(ap_index, win_num), win->target_id);
+}
+
+static void io_win_disable_window(int ap_index, uint32_t win_num)
+{
+ uint32_t win_reg;
+
+ if ((win_num == 0) || (win_num > MVEBU_IO_WIN_MAX_WINS)) {
+ ERROR("Disabling wrong IOW window %d!\n", win_num);
+ return;
+ }
+
+ win_reg = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_num));
+ win_reg &= ~WIN_ENABLE_BIT;
+ mmio_write_32(IO_WIN_ALR_OFFSET(ap_index, win_num), win_reg);
+}
+
+/* Insert/Remove temporary window for using the out-of reset default
+ * CPx base address to access the CP configuration space prior to
+ * the further base address update in accordance with address mapping
+ * design.
+ *
+ * NOTE: Use the same window array for insertion and removal of
+ * temporary windows.
+ */
+void iow_temp_win_insert(int ap_index, struct addr_map_win *win, int size)
+{
+ uint32_t win_id;
+
+ for (int i = 0; i < size; i++) {
+ win_id = MVEBU_IO_WIN_MAX_WINS - i - 1;
+ io_win_check(win);
+ io_win_enable_window(ap_index, win, win_id);
+ win++;
+ }
+}
+
+/*
+ * NOTE: Use the same window array for insertion and removal of
+ * temporary windows.
+ */
+void iow_temp_win_remove(int ap_index, struct addr_map_win *win, int size)
+{
+ uint32_t win_id;
+
+ /* Start from the last window and do not touch Win0 */
+ for (int i = 0; i < size; i++) {
+ uint64_t base;
+ uint32_t target;
+
+ win_id = MVEBU_IO_WIN_MAX_WINS - i - 1;
+
+ target = mmio_read_32(IO_WIN_CR_OFFSET(ap_index, win_id));
+ base = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_id));
+ base &= ~WIN_ENABLE_BIT;
+ base <<= ADDRESS_SHIFT;
+
+ if ((win->target_id != target) || (win->base_addr != base)) {
+ ERROR("%s: Trying to remove bad window-%d!\n",
+ __func__, win_id);
+ continue;
+ }
+ io_win_disable_window(ap_index, win_id);
+ win++;
+ }
+}
+
+#ifdef DEBUG_ADDR_MAP
+static void dump_io_win(int ap_index)
+{
+ uint32_t trgt_id, win_id;
+ uint32_t alr, ahr;
+ uint64_t start, end;
+
+ /* Dump all IO windows */
+ tf_printf("\tbank target start end\n");
+ tf_printf("\t----------------------------------------------------\n");
+ for (win_id = 0; win_id < MVEBU_IO_WIN_MAX_WINS; win_id++) {
+ alr = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_id));
+ if (alr & WIN_ENABLE_BIT) {
+ alr &= ~WIN_ENABLE_BIT;
+ ahr = mmio_read_32(IO_WIN_AHR_OFFSET(ap_index, win_id));
+ trgt_id = mmio_read_32(IO_WIN_CR_OFFSET(ap_index,
+ win_id));
+ start = ((uint64_t)alr << ADDRESS_SHIFT);
+ end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
+ tf_printf("\tio-win %d 0x%016llx 0x%016llx\n",
+ trgt_id, start, end);
+ }
+ }
+ tf_printf("\tio-win gcr is %x\n",
+ mmio_read_32(MVEBU_IO_WIN_BASE(ap_index) +
+ MVEBU_IO_WIN_GCR_OFFSET));
+}
+#endif
+
+static void iow_save_win_range(int ap_id, int win_first, int win_last,
+ uint32_t *buffer)
+{
+ int win_id, idx;
+
+ /* Save IOW */
+ for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
+ buffer[idx++] = mmio_read_32(IO_WIN_CR_OFFSET(ap_id, win_id));
+ buffer[idx++] = mmio_read_32(IO_WIN_ALR_OFFSET(ap_id, win_id));
+ buffer[idx++] = mmio_read_32(IO_WIN_AHR_OFFSET(ap_id, win_id));
+ }
+ buffer[idx] = mmio_read_32(MVEBU_IO_WIN_BASE(ap_id) +
+ MVEBU_IO_WIN_GCR_OFFSET);
+}
+
+static void iow_restore_win_range(int ap_id, int win_first, int win_last,
+ uint32_t *buffer)
+{
+ int win_id, idx;
+
+ /* Restore IOW */
+ for (idx = 0, win_id = win_first; win_id <= win_last; win_id++) {
+ mmio_write_32(IO_WIN_CR_OFFSET(ap_id, win_id), buffer[idx++]);
+ mmio_write_32(IO_WIN_ALR_OFFSET(ap_id, win_id), buffer[idx++]);
+ mmio_write_32(IO_WIN_AHR_OFFSET(ap_id, win_id), buffer[idx++]);
+ }
+ mmio_write_32(MVEBU_IO_WIN_BASE(ap_id) + MVEBU_IO_WIN_GCR_OFFSET,
+ buffer[idx++]);
+}
+
+void iow_save_win_all(int ap_id)
+{
+ iow_save_win_range(ap_id, 0, MVEBU_IO_WIN_MAX_WINS - 1,
+ io_win_regs_save);
+}
+
+void iow_restore_win_all(int ap_id)
+{
+ iow_restore_win_range(ap_id, 0, MVEBU_IO_WIN_MAX_WINS - 1,
+ io_win_regs_save);
+}
+
+int init_io_win(int ap_index)
+{
+ struct addr_map_win *win;
+ uint32_t win_id, win_reg;
+ uint32_t win_count;
+
+ INFO("Initializing IO WIN Address decoding\n");
+
+ /* Get the array of the windows and its size */
+ marvell_get_io_win_memory_map(ap_index, &win, &win_count);
+ if (win_count <= 0)
+ INFO("no windows configurations found\n");
+
+ if (win_count > MVEBU_IO_WIN_MAX_WINS) {
+ INFO("number of windows is bigger than %d\n",
+ MVEBU_IO_WIN_MAX_WINS);
+ return 0;
+ }
+
+ /* Get the default target id to set the GCR */
+ win_reg = marvell_get_io_win_gcr_target(ap_index);
+ mmio_write_32(MVEBU_IO_WIN_BASE(ap_index) + MVEBU_IO_WIN_GCR_OFFSET,
+ win_reg);
+
+ /* disable all IO windows */
+ for (win_id = 1; win_id < MVEBU_IO_WIN_MAX_WINS; win_id++)
+ io_win_disable_window(ap_index, win_id);
+
+ /* enable relevant windows, starting from win_id = 1 because
+ * index 0 dedicated for BootROM
+ */
+ for (win_id = 1; win_id <= win_count; win_id++, win++) {
+ io_win_check(win);
+ io_win_enable_window(ap_index, win, win_id);
+ }
+
+#ifdef DEBUG_ADDR_MAP
+ dump_io_win(ap_index);
+#endif
+
+ INFO("Done IO WIN Address decoding Initializing\n");
+
+ return 0;
+}