National Semiconductor DP83815/DP83816 and DP83820 NIC programmer support

Some instability remains, but that may be due to hardware problems in
the specific card (Netgear FA311) used for testing.

Corresponding to flashrom svn r1039.

Signed-off-by: Andrew Morgan <ziltro@ziltro.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

4 files changed, 130 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 18c5a6b..2e774df 100644
--- a/Makefile
+++ b/Makefile
@@ -113,6 +113,9 @@ CONFIG_DRKAISER ?= yes
 # Always enable Realtek NICs for now.
 CONFIG_NICREALTEK ?= yes
 
+# Disable National Semiconductor NICs until support is complete and tested.
+CONFIG_NICNATSEMI ?= no
+
 # Always enable Bus Pirate SPI for now.
 CONFIG_BUSPIRATE_SPI ?= yes
 
@@ -192,6 +195,12 @@ PROGRAMMER_OBJS += nicrealtek.o
 NEED_PCI := yes
 endif
 
+ifeq ($(CONFIG_NICNATSEMI), yes)
+FEATURE_CFLAGS += -D'CONFIG_NICNATSEMI=1'
+PROGRAMMER_OBJS += nicnatsemi.o
+NEED_PCI := yes
+endif
+
 ifeq ($(CONFIG_BUSPIRATE_SPI), yes)
 FEATURE_CFLAGS += -D'CONFIG_BUSPIRATE_SPI=1'
 PROGRAMMER_OBJS += buspirate_spi.o
diff --git a/flash.h b/flash.h
index 9d92db2..13f7981 100644
--- a/flash.h
+++ b/flash.h
@@ -49,6 +49,9 @@ enum programmer {
 	PROGRAMMER_NICREALTEK,
 	PROGRAMMER_NICREALTEK2,
 #endif	
+#if CONFIG_NICNATSEMI == 1
+	PROGRAMMER_NICNATSEMI,
+#endif	
 #if CONFIG_GFXNVIDIA == 1
 	PROGRAMMER_GFXNVIDIA,
 #endif
@@ -339,7 +342,7 @@ uint32_t pcidev_init(uint16_t vendor_id, uint32_t bar, struct pcidev_status *dev
 /* print.c */
 char *flashbuses_to_text(enum chipbustype bustype);
 void print_supported(void);
-#if CONFIG_NIC3COM+CONFIG_NICREALTEK+CONFIG_GFXNVIDIA+CONFIG_DRKAISER+CONFIG_SATASII+CONFIG_ATAHPT >= 1
+#if CONFIG_NIC3COM+CONFIG_NICREALTEK+CONFIG_NICNATSEMI+CONFIG_GFXNVIDIA+CONFIG_DRKAISER+CONFIG_SATASII+CONFIG_ATAHPT >= 1
 void print_supported_pcidevs(struct pcidev_status *devs);
 #endif
 void print_supported_wiki(void);
@@ -491,6 +494,14 @@ extern struct pcidev_status nics_realtek[];
 extern struct pcidev_status nics_realteksmc1211[];
 #endif
 
+/* nicnatsemi.c */
+#if CONFIG_NICNATSEMI == 1
+int nicnatsemi_init(void);
+int nicnatsemi_shutdown(void);
+void nicnatsemi_chip_writeb(uint8_t val, chipaddr addr);
+uint8_t nicnatsemi_chip_readb(const chipaddr addr);
+extern struct pcidev_status nics_natsemi[];
+#endif
 
 /* satasii.c */
 #if CONFIG_SATASII == 1
diff --git a/flashrom.c b/flashrom.c
index 73145a9..0f51979 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -48,7 +48,7 @@ enum programmer programmer = PROGRAMMER_DUMMY;
  * if more than one of them is selected. If only one is selected, it is clear
  * that the user wants that one to become the default.
  */
-#if CONFIG_NIC3COM+CONFIG_NICREALTEK+CONFIG_GFXNVIDIA+CONFIG_DRKAISER+CONFIG_SATASII+CONFIG_ATAHPT+CONFIG_FT2232_SPI+CONFIG_SERPROG+CONFIG_BUSPIRATE_SPI+CONFIG_DEDIPROG > 1
+#if CONFIG_NIC3COM+CONFIG_NICREALTEK+CONFIG_NICNATSEMI+CONFIG_GFXNVIDIA+CONFIG_DRKAISER+CONFIG_SATASII+CONFIG_ATAHPT+CONFIG_FT2232_SPI+CONFIG_SERPROG+CONFIG_BUSPIRATE_SPI+CONFIG_DEDIPROG > 1
 #error Please enable either CONFIG_DUMMY or CONFIG_INTERNAL or disable support for all programmers except one.
 #endif
 enum programmer programmer =
@@ -59,6 +59,9 @@ enum programmer programmer =
 	PROGRAMMER_NICREALTEK
 	PROGRAMMER_NICREALTEK2
 #endif
+#if CONFIG_NICNATSEMI == 1
+	PROGRAMMER_NICNATSEMI
+#endif
 #if CONFIG_GFXNVIDIA == 1
 	PROGRAMMER_GFXNVIDIA
 #endif
@@ -199,6 +202,24 @@ const struct programmer_entry programmer_table[] = {
 	},
 #endif
 
+#if CONFIG_NICNATSEMI == 1
+	{
+		.name                   = "nicnatsemi",
+		.init                   = nicnatsemi_init,
+		.shutdown               = nicnatsemi_shutdown,
+		.map_flash_region       = fallback_map,
+		.unmap_flash_region     = fallback_unmap,
+		.chip_readb             = nicnatsemi_chip_readb,
+		.chip_readw             = fallback_chip_readw,
+		.chip_readl             = fallback_chip_readl,
+		.chip_readn             = fallback_chip_readn,
+		.chip_writeb            = nicnatsemi_chip_writeb,
+		.chip_writew            = fallback_chip_writew,
+		.chip_writel            = fallback_chip_writel,
+		.chip_writen            = fallback_chip_writen,
+		.delay                  = internal_delay,
+	},
+#endif
 
 #if CONFIG_GFXNVIDIA == 1
 	{
diff --git a/nicnatsemi.c b/nicnatsemi.c
new file mode 100644
index 0000000..1878f51
--- /dev/null
+++ b/nicnatsemi.c
@@ -0,0 +1,87 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2010 Andrew Morgan <ziltro@ziltro.com>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+
+#include <stdlib.h>
+#include "flash.h"
+
+#define PCI_VENDOR_ID_NATSEMI	0x100b
+
+#define BOOT_ROM_ADDR		0x50
+#define BOOT_ROM_DATA		0x54
+
+struct pcidev_status nics_natsemi[] = {
+	{0x100b, 0x0020, NT, "National Semiconductor", "DP83815/DP83816"},
+	{0x100b, 0x0022, NT, "National Semiconductor", "DP83820"},
+	{},
+};
+
+int nicnatsemi_init(void)
+{
+	get_io_perms();
+
+	io_base_addr = pcidev_init(PCI_VENDOR_ID_NATSEMI, PCI_BASE_ADDRESS_0,
+				   nics_natsemi, programmer_param);
+
+	buses_supported = CHIP_BUSTYPE_PARALLEL;
+
+	return 0;
+}
+
+int nicnatsemi_shutdown(void)
+{
+	free(programmer_param);
+	pci_cleanup(pacc);
+	release_io_perms();
+	return 0;
+}
+
+void nicnatsemi_chip_writeb(uint8_t val, chipaddr addr)
+{
+	OUTL((uint32_t)addr & 0x0000FFFF, io_base_addr + BOOT_ROM_ADDR);
+	/*
+	 * The datasheet requires 32 bit accesses to this register, but it seems
+	 * that requirement might only apply if the register is memory mapped.
+	 * Bit 8-31 of this register are apparently don't care, and if this
+	 * register is I/O port mapped 8 bit accesses to the lowest byte of the
+	 * register seem to work fine. Due to that, we ignore the advice in the
+	 * data sheet.
+	 */
+	OUTB(val, io_base_addr + BOOT_ROM_DATA);
+}
+
+uint8_t nicnatsemi_chip_readb(const chipaddr addr)
+{
+	OUTL(((uint32_t)addr & 0x0000FFFF), io_base_addr + BOOT_ROM_ADDR);
+	/*
+	 * The datasheet requires 32 bit accesses to this register, but it seems
+	 * that requirement might only apply if the register is memory mapped.
+	 * Bit 8-31 of this register are apparently don't care, and if this
+	 * register is I/O port mapped 8 bit accesses to the lowest byte of the
+	 * register seem to work fine. Due to that, we ignore the advice in the
+	 * data sheet.
+	 */
+	return INB(io_base_addr + BOOT_ROM_DATA);
+}
+
+#else
+#error PCI port I/O access is not supported on this architecture yet.
+#endif