[PATCH] wanXL serial card driver

From: Krzysztof Halasa <khc@pm.waw.pl>

This is a driver for SBE Inc.  wanXL 4-port sync serial card, second
version.

drivers/net/wan/Kconfig

@@ -342,6 +342,30 @@ config HDLC_X25
 comment "X.25/LAPB support is disabled"
 	depends on WAN && HDLC && (LAPB!=m || HDLC!=m) && LAPB!=y
 
+config WANXL
+	tristate "SBE Inc. wanXL support"
+	depends on HDLC && PCI
+	help
+	  This driver is for wanXL PCI cards made by SBE Inc.  If you have
+	  such a card, say Y here and see <http://hq.pm.waw.pl/pub/hdlc/>.
+
+	  If you want to compile the driver as a module ( = code which can be
+	  inserted in and removed from the running kernel whenever you want),
+	  say M here and read <file:Documentation/modules.txt>.  The module
+	  will be called wanxl.
+
+	  If unsure, say N here.
+
+config WANXL_BUILD_FIRMWARE
+	bool "rebuild wanXL firmware"
+	depends on WANXL
+	help
+	  This option allows you to rebuild firmware run by the QUICC
+	  processor. It requires as68k, ld68k and hexdump programs.
+	  You should never need this option.
+
+	  If unsure, say N here.
+
 config PC300
 	tristate "Cyclades-PC300 support (RS-232/V.35, X.21, T1/E1 boards)"
 	depends on HDLC && PCI

drivers/net/wan/Makefile

@@ -66,3 +66,25 @@ ifeq ($(CONFIG_HDLC_PPP),y)
 endif
 obj-$(CONFIG_N2)		+= n2.o
 obj-$(CONFIG_C101)		+= c101.o
+obj-$(CONFIG_WANXL)		+= wanxl.o
+
+ifeq ($(CONFIG_WANXL_BUILD_FIRMWARE),y)
+ifeq ($(ARCH),m68k)
+  AS68K = $(AS)
+  LD68K = $(LD)
+else
+  AS68K = as68k
+  LD68K = ld68k
+endif
+
+quiet_cmd_build_wanxlfw = BLD FW  $@
+      cmd_build_wanxlfw = \
+	$(CPP) -Wp,-MD,$(depfile) -Iinclude $(obj)/wanxlfw.S | $(AS68K) -m68360 -o $(obj)/wanxlfw.o; \
+	$(LD68K) --oformat binary -Ttext 0x1000 $(obj)/wanxlfw.o -o $(obj)/wanxlfw.bin; \
+	hexdump -ve '"\n" 16/1 "0x%02X,"' $(obj)/wanxlfw.bin | sed 's/0x  ,//g;1s/^/static u8 firmware[]={/;$$s/,$$/\n};\n/' >$(obj)/wanxlfw.inc; \
+	rm -f $(obj)/wanxlfw.bin $(obj)/wanxlfw.o
+
+$(obj)/wanxlfw.inc:	$(obj)/wanxlfw.S
+	$(call if_changed_dep,build_wanxlfw)
+targets += wanxlfw.inc
+endif

drivers/net/wan/wanxl.h

+/*
+ * wanXL serial card driver for Linux
+ * definitions common to host driver and card firmware
+ *
+ * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#define RESET_WHILE_LOADING 0
+
+/* you must rebuild the firmware if any of the following is changed */
+#define DETECT_RAM 0		/* needed for > 4MB RAM, 16 MB maximum */
+#define QUICC_MEMCPY_USES_PLX 1	/* must be used if the host has > 256 MB RAM */
+
+
+#define STATUS_CABLE_V35	2
+#define STATUS_CABLE_X21	3
+#define STATUS_CABLE_V24	4
+#define STATUS_CABLE_EIA530	5
+#define STATUS_CABLE_INVALID	6
+#define STATUS_CABLE_NONE	7
+
+#define STATUS_CABLE_DCE	0x8000
+#define STATUS_CABLE_DSR	0x0010
+#define STATUS_CABLE_DCD	0x0008
+#define STATUS_CABLE_PM_SHIFT	5
+
+#define PDM_OFFSET 0x1000
+
+#define TX_BUFFERS 10		/* per port */
+#define RX_BUFFERS 30
+#define RX_QUEUE_LENGTH 40	/* card->host queue length - per card */
+
+#define PACKET_EMPTY		0x00
+#define PACKET_FULL		0x10
+#define PACKET_SENT		0x20 /* TX only */
+#define PACKET_UNDERRUN		0x30 /* TX only */
+#define PACKET_PORT_MASK	0x03 /* RX only */
+
+/* bit numbers in PLX9060 doorbell registers */
+#define DOORBELL_FROM_CARD_TX_0		0 /* packet sent by the card */
+#define DOORBELL_FROM_CARD_TX_1		1
+#define DOORBELL_FROM_CARD_TX_2		2
+#define DOORBELL_FROM_CARD_TX_3		3
+#define DOORBELL_FROM_CARD_RX		4
+#define DOORBELL_FROM_CARD_CABLE_0	5 /* cable/PM/etc. changed */
+#define DOORBELL_FROM_CARD_CABLE_1	6
+#define DOORBELL_FROM_CARD_CABLE_2	7
+#define DOORBELL_FROM_CARD_CABLE_3	8
+
+#define DOORBELL_TO_CARD_OPEN_0		0
+#define DOORBELL_TO_CARD_OPEN_1		1
+#define DOORBELL_TO_CARD_OPEN_2		2
+#define DOORBELL_TO_CARD_OPEN_3		3
+#define DOORBELL_TO_CARD_CLOSE_0	4
+#define DOORBELL_TO_CARD_CLOSE_1	5
+#define DOORBELL_TO_CARD_CLOSE_2	6
+#define DOORBELL_TO_CARD_CLOSE_3	7
+#define DOORBELL_TO_CARD_TX_0		8 /* outbound packet queued */
+#define DOORBELL_TO_CARD_TX_1		9
+#define DOORBELL_TO_CARD_TX_2		10
+#define DOORBELL_TO_CARD_TX_3		11
+
+/* firmware-only status bits, starting from last DOORBELL_TO_CARD + 1 */
+#define TASK_SCC_0			12
+#define TASK_SCC_1			13
+#define TASK_SCC_2			14
+#define TASK_SCC_3			15
+
+#define ALIGN32(x) (((x) + 3) & 0xFFFFFFFC)
+#define BUFFER_LENGTH	ALIGN32(HDLC_MAX_MRU + 4) /* 4 bytes for 32-bit CRC */
+
+/* Address of TX and RX buffers in 68360 address space */
+#define BUFFERS_ADDR	0x4000	/* 16 KB */
+
+#ifndef __ASSEMBLER__
+#define PLX_OFFSET		0
+#else
+#define PLX_OFFSET		PLX + 0x80
+#endif
+
+#define PLX_MAILBOX_0		(PLX_OFFSET + 0x40)
+#define PLX_MAILBOX_1		(PLX_OFFSET + 0x44)
+#define PLX_MAILBOX_2		(PLX_OFFSET + 0x48)
+#define PLX_MAILBOX_3		(PLX_OFFSET + 0x4C)
+#define PLX_MAILBOX_4		(PLX_OFFSET + 0x50)
+#define PLX_MAILBOX_5		(PLX_OFFSET + 0x54)
+#define PLX_MAILBOX_6		(PLX_OFFSET + 0x58)
+#define PLX_MAILBOX_7		(PLX_OFFSET + 0x5C)
+#define PLX_DOORBELL_TO_CARD	(PLX_OFFSET + 0x60)
+#define PLX_DOORBELL_FROM_CARD	(PLX_OFFSET + 0x64)
+#define PLX_INTERRUPT_CS	(PLX_OFFSET + 0x68)
+#define PLX_CONTROL		(PLX_OFFSET + 0x6C)
+
+#ifdef __ASSEMBLER__
+#define PLX_DMA_0_MODE		(PLX + 0x100)
+#define PLX_DMA_0_PCI		(PLX + 0x104)
+#define PLX_DMA_0_LOCAL		(PLX + 0x108)
+#define PLX_DMA_0_LENGTH	(PLX + 0x10C)
+#define PLX_DMA_0_DESC		(PLX + 0x110)
+#define PLX_DMA_1_MODE		(PLX + 0x114)
+#define PLX_DMA_1_PCI		(PLX + 0x118)
+#define PLX_DMA_1_LOCAL		(PLX + 0x11C)
+#define PLX_DMA_1_LENGTH	(PLX + 0x120)
+#define PLX_DMA_1_DESC		(PLX + 0x124)
+#define PLX_DMA_CMD_STS		(PLX + 0x128)
+#define PLX_DMA_ARBITR_0	(PLX + 0x12C)
+#define PLX_DMA_ARBITR_1	(PLX + 0x130)
+#endif
+
+#define DESC_LENGTH 12
+
+/* offsets from start of status_t */
+/* card to host */
+#define STATUS_OPEN		0
+#define STATUS_CABLE		(STATUS_OPEN + 4)
+#define STATUS_RX_OVERRUNS	(STATUS_CABLE + 4)
+#define STATUS_RX_FRAME_ERRORS	(STATUS_RX_OVERRUNS + 4)
+
+/* host to card */
+#define STATUS_PARITY		(STATUS_RX_FRAME_ERRORS + 4)
+#define STATUS_ENCODING		(STATUS_PARITY + 4)
+#define STATUS_CLOCKING		(STATUS_ENCODING + 4)
+#define STATUS_TX_DESCS		(STATUS_CLOCKING + 4)
+
+#ifndef __ASSEMBLER__
+
+typedef struct {
+	volatile u32 stat;
+	u32 address;		/* PCI address */
+	volatile u32 length;
+}desc_t;
+
+
+typedef struct {
+// Card to host
+	volatile u32 open;
+	volatile u32 cable;
+	volatile u32 rx_overruns;
+	volatile u32 rx_frame_errors;
+
+// Host to card
+	u32 parity;
+	u32 encoding;
+	u32 clocking;
+	desc_t tx_descs[TX_BUFFERS];
+}port_status_t;
+
+#endif /* __ASSEMBLER__ */