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-rw-r--r--sim/bfin/dv-bfin_nfc.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/sim/bfin/dv-bfin_nfc.c b/sim/bfin/dv-bfin_nfc.c
new file mode 100644
index 0000000..48990ee
--- /dev/null
+++ b/sim/bfin/dv-bfin_nfc.c
@@ -0,0 +1,241 @@
+/* Blackfin NAND Flash Memory Controller (NFC) model
+
+ Copyright (C) 2010-2011 Free Software Foundation, Inc.
+ Contributed by Analog Devices, Inc.
+
+ This file is part of simulators.
+
+ 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; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+
+#include "sim-main.h"
+#include "devices.h"
+#include "dv-bfin_nfc.h"
+
+/* XXX: This is merely a stub. */
+
+struct bfin_nfc
+{
+ /* This top portion matches common dv_bfin struct. */
+ bu32 base;
+ struct hw *dma_master;
+ bool acked;
+
+ struct hw_event *handler;
+ char saved_byte;
+ int saved_count;
+
+ /* Order after here is important -- matches hardware MMR layout. */
+ bu16 BFIN_MMR_16(ctl);
+ bu16 BFIN_MMR_16(stat);
+ bu16 BFIN_MMR_16(irqstat);
+ bu16 BFIN_MMR_16(irqmask);
+ bu16 BFIN_MMR_16(ecc0);
+ bu16 BFIN_MMR_16(ecc1);
+ bu16 BFIN_MMR_16(ecc2);
+ bu16 BFIN_MMR_16(ecc3);
+ bu16 BFIN_MMR_16(count);
+ bu16 BFIN_MMR_16(rst);
+ bu16 BFIN_MMR_16(pgctl);
+ bu16 BFIN_MMR_16(read);
+ bu32 _pad0[4];
+ bu16 BFIN_MMR_16(addr);
+ bu16 BFIN_MMR_16(cmd);
+ bu16 BFIN_MMR_16(data_wr);
+ bu16 BFIN_MMR_16(data_rd);
+};
+#define mmr_base() offsetof(struct bfin_nfc, ctl)
+#define mmr_offset(mmr) (offsetof(struct bfin_nfc, mmr) - mmr_base())
+#define mmr_idx(mmr) (mmr_offset (mmr) / 4)
+
+static const char * const mmr_names[] = {
+ "NFC_CTL", "NFC_STAT", "NFC_IRQSTAT", "NFC_IRQMASK", "NFC_ECC0", "NFC_ECC1",
+ "NFC_ECC2", "NFC_ECC3", "NFC_COUNT", "NFC_RST", "NFC_PGCTL", "NFC_READ",
+ [mmr_idx (addr)] = "NFC_ADDR", "NFC_CMD", "NFC_DATA_WR", "NFC_DATA_RD",
+};
+#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
+
+static unsigned
+bfin_nfc_io_write_buffer (struct hw *me, const void *source, int space,
+ address_word addr, unsigned nr_bytes)
+{
+ struct bfin_nfc *nfc = hw_data (me);
+ bu32 mmr_off;
+ bu32 value;
+ bu16 *valuep;
+
+ value = dv_load_2 (source);
+ mmr_off = addr - nfc->base;
+ valuep = (void *)((unsigned long)nfc + mmr_base() + mmr_off);
+
+ HW_TRACE_WRITE ();
+
+ dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
+
+ switch (mmr_off)
+ {
+ case mmr_offset(ctl):
+ case mmr_offset(stat):
+ case mmr_offset(irqmask):
+ case mmr_offset(ecc0):
+ case mmr_offset(ecc1):
+ case mmr_offset(ecc2):
+ case mmr_offset(ecc3):
+ case mmr_offset(count):
+ case mmr_offset(rst):
+ case mmr_offset(pgctl):
+ case mmr_offset(read):
+ case mmr_offset(addr):
+ case mmr_offset(cmd):
+ case mmr_offset(data_wr):
+ *valuep = value;
+ break;
+ case mmr_offset(data_rd):
+ nfc->irqstat |= RD_RDY;
+ *valuep = value;
+ break;
+ case mmr_offset(irqstat):
+ dv_w1c_2 (valuep, value, 0);
+ break;
+ default:
+ dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
+ break;
+ }
+
+ return nr_bytes;
+}
+
+static unsigned
+bfin_nfc_io_read_buffer (struct hw *me, void *dest, int space,
+ address_word addr, unsigned nr_bytes)
+{
+ struct bfin_nfc *nfc = hw_data (me);
+ bu32 mmr_off;
+ bu16 *valuep;
+
+ mmr_off = addr - nfc->base;
+ valuep = (void *)((unsigned long)nfc + mmr_base() + mmr_off);
+
+ HW_TRACE_READ ();
+
+ dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
+
+ switch (mmr_off)
+ {
+ case mmr_offset(ctl):
+ case mmr_offset(stat):
+ case mmr_offset(irqstat):
+ case mmr_offset(irqmask):
+ case mmr_offset(ecc0):
+ case mmr_offset(ecc1):
+ case mmr_offset(ecc2):
+ case mmr_offset(ecc3):
+ case mmr_offset(count):
+ case mmr_offset(rst):
+ case mmr_offset(read):
+ dv_store_2 (dest, *valuep);
+ break;
+ case mmr_offset(pgctl):
+ case mmr_offset(addr):
+ case mmr_offset(cmd):
+ case mmr_offset(data_wr):
+ case mmr_offset(data_rd):
+ /* These regs are write only. */
+ default:
+ dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
+ break;
+ }
+
+ return nr_bytes;
+}
+
+static unsigned
+bfin_nfc_dma_read_buffer (struct hw *me, void *dest, int space,
+ unsigned_word addr, unsigned nr_bytes)
+{
+ HW_TRACE_DMA_READ ();
+ return 0;
+}
+
+static unsigned
+bfin_nfc_dma_write_buffer (struct hw *me, const void *source,
+ int space, unsigned_word addr,
+ unsigned nr_bytes,
+ int violate_read_only_section)
+{
+ HW_TRACE_DMA_WRITE ();
+ return nr_bytes;
+}
+
+static const struct hw_port_descriptor bfin_nfc_ports[] = {
+ { "stat", 0, 0, output_port, },
+ { NULL, 0, 0, 0, },
+};
+
+static void
+attach_bfin_nfc_regs (struct hw *me, struct bfin_nfc *nfc)
+{
+ address_word attach_address;
+ int attach_space;
+ unsigned attach_size;
+ reg_property_spec reg;
+
+ if (hw_find_property (me, "reg") == NULL)
+ hw_abort (me, "Missing \"reg\" property");
+
+ if (!hw_find_reg_array_property (me, "reg", 0, &reg))
+ hw_abort (me, "\"reg\" property must contain three addr/size entries");
+
+ hw_unit_address_to_attach_address (hw_parent (me),
+ &reg.address,
+ &attach_space, &attach_address, me);
+ hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
+
+ if (attach_size != BFIN_MMR_NFC_SIZE)
+ hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_NFC_SIZE);
+
+ hw_attach_address (hw_parent (me),
+ 0, attach_space, attach_address, attach_size, me);
+
+ nfc->base = attach_address;
+}
+
+static void
+bfin_nfc_finish (struct hw *me)
+{
+ struct bfin_nfc *nfc;
+
+ nfc = HW_ZALLOC (me, struct bfin_nfc);
+
+ set_hw_data (me, nfc);
+ set_hw_io_read_buffer (me, bfin_nfc_io_read_buffer);
+ set_hw_io_write_buffer (me, bfin_nfc_io_write_buffer);
+ set_hw_dma_read_buffer (me, bfin_nfc_dma_read_buffer);
+ set_hw_dma_write_buffer (me, bfin_nfc_dma_write_buffer);
+ set_hw_ports (me, bfin_nfc_ports);
+
+ attach_bfin_nfc_regs (me, nfc);
+
+ /* Initialize the NFC. */
+ nfc->ctl = 0x0200;
+ nfc->stat = 0x0011;
+ nfc->irqstat = 0x0004;
+ nfc->irqmask = 0x001F;
+}
+
+const struct hw_descriptor dv_bfin_nfc_descriptor[] = {
+ {"bfin_nfc", bfin_nfc_finish,},
+ {NULL, NULL},
+};
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