1 files changed, 432 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/drivers/net/3c509.c b/contrib/syslinux-4.02/gpxe/src/drivers/net/3c509.c
new file mode 100644
index 0000000..1c58f77
--- /dev/null
+++ b/contrib/syslinux-4.02/gpxe/src/drivers/net/3c509.c
@@ -0,0 +1,432 @@
+/*
+ * Split out into 3c509.c and 3c5x9.c, to make it possible to build a
+ * 3c529 module without including ISA, ISAPnP and EISA code.
+ *
+ */
+
+FILE_LICENCE ( BSD2 );
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <gpxe/io.h>
+#include <unistd.h>
+#include <gpxe/device.h>
+#include <gpxe/isa.h>
+#include "3c509.h"
+
+/*
+ * 3c509 cards have their own method of contention resolution; this
+ * effectively defines another bus type similar to ISAPnP.  Even the
+ * original ISA cards can be programatically mapped to any I/O address
+ * in the range 0x200-0x3e0.
+ * 
+ * However, there is a small problem: once you've activated a card,
+ * the only ways to deactivate it will also wipe its tag, meaning that
+ * you won't be able to subsequently reactivate it without going
+ * through the whole ID sequence again.  The solution we adopt is to
+ * isolate and tag all cards at the start, and to immediately
+ * re-isolate and re-tag a card after disabling it.
+ *
+ */
+
+static void t509bus_remove ( struct root_device *rootdev );
+
+static unsigned int t509_id_port = 0;
+static unsigned int t509_max_tag = 0;
+
+/** A 3c509 device */
+struct t509_device {
+	/** Generic device */
+	struct device dev;
+	/** Tag */
+	unsigned int tag;
+	/** I/O address */
+	uint16_t ioaddr;
+	/** Driver-private data
+	 *
+	 * Use t509_set_drvdata() and t509_get_drvdata() to access
+	 * this field.
+	 */
+	void *priv;
+};
+
+/**
+ * Set 3c509 driver-private data
+ *
+ * @v t509		3c509 device
+ * @v priv		Private data
+ */
+static inline void t509_set_drvdata ( struct t509_device *t509, void *priv ) {
+	t509->priv = priv;
+}
+
+/**
+ * Get 3c509 driver-private data
+ *
+ * @v t509		3c509 device
+ * @ret priv		Private data
+ */
+static inline void * t509_get_drvdata ( struct t509_device *t509 ) {
+	return t509->priv;
+}
+
+/*
+ * t509 utility functions
+ *
+ */
+
+static inline void t509_set_id_port ( void ) {
+	outb ( 0x00, t509_id_port );
+}
+
+static inline void t509_wait_for_id_sequence ( void ) {
+	outb ( 0x00, t509_id_port );
+}
+
+static inline void t509_global_reset ( void ) {
+	outb ( 0xc0, t509_id_port );
+}
+
+static inline void t509_reset_tag ( void ) {
+	outb ( 0xd0, t509_id_port );
+}
+
+static inline void t509_set_tag ( uint8_t tag ) {
+	outb ( 0xd0 | tag, t509_id_port );
+}
+
+static inline void t509_select_tag ( uint8_t tag ) {
+	outb ( 0xd8 | tag, t509_id_port );
+}
+
+static inline void t509_activate ( uint16_t ioaddr ) {
+	outb ( 0xe0 | ( ioaddr >> 4 ), t509_id_port );
+}
+
+static inline void t509_deactivate_and_reset_tag ( uint16_t ioaddr ) {
+	outb ( GLOBAL_RESET, ioaddr + EP_COMMAND );
+}
+
+static inline void t509_load_eeprom_word ( uint8_t offset ) {
+	outb ( 0x80 | offset, t509_id_port );
+}
+
+/*
+ * Find a suitable ID port
+ *
+ */
+static inline int t509_find_id_port ( void ) {
+
+	for ( t509_id_port = EP_ID_PORT_START ;
+	      t509_id_port < EP_ID_PORT_END ;
+	      t509_id_port += EP_ID_PORT_INC ) {
+		t509_set_id_port ();
+		/* See if anything's listening */
+		outb ( 0xff, t509_id_port );
+		if ( inb ( t509_id_port ) & 0x01 ) {
+			/* Found a suitable port */
+			DBG ( "T509 using ID port at %04x\n", t509_id_port );
+			return 0;
+		}
+	}
+	/* No id port available */
+	DBG ( "T509 found no available ID port\n" );
+	return -ENOENT;
+}
+
+/*
+ * Send ID sequence to the ID port
+ *
+ */
+static void t509_send_id_sequence ( void ) {
+	unsigned short lrs_state, i;
+
+	t509_set_id_port ();
+	/* Reset IDS on cards */
+	t509_wait_for_id_sequence ();
+	lrs_state = 0xff;
+        for ( i = 0; i < 255; i++ ) {
+                outb ( lrs_state, t509_id_port );
+                lrs_state <<= 1;
+                lrs_state = lrs_state & 0x100 ? lrs_state ^ 0xcf : lrs_state;
+        }
+}
+
+/*
+ * We get eeprom data from the id_port given an offset into the eeprom.
+ * Basically; after the ID_sequence is sent to all of the cards; they enter
+ * the ID_CMD state where they will accept command requests. 0x80-0xbf loads
+ * the eeprom data.  We then read the port 16 times and with every read; the
+ * cards check for contention (ie: if one card writes a 0 bit and another
+ * writes a 1 bit then the host sees a 0. At the end of the cycle; each card
+ * compares the data on the bus; if there is a difference then that card goes
+ * into ID_WAIT state again). In the meantime; one bit of data is returned in
+ * the AX register which is conveniently returned to us by inb().  Hence; we
+ * read 16 times getting one bit of data with each read.
+ */
+static uint16_t t509_id_read_eeprom ( int offset ) {
+	int i, data = 0;
+
+	t509_load_eeprom_word ( offset );
+	/* Do we really need this wait? Won't be noticeable anyway */
+	udelay(10000);
+
+	for ( i = 0; i < 16; i++ ) {
+		data = ( data << 1 ) | ( inw ( t509_id_port ) & 1 );
+	}
+	return data;
+}
+
+/*
+ * Isolate and tag all t509 cards
+ *
+ */
+static int t509_isolate ( void ) {
+	unsigned int i;
+	uint16_t contend[3];
+	int rc;
+
+	/* Find a suitable ID port */
+	if ( ( rc = t509_find_id_port() ) != 0 )
+		return rc;
+
+	while ( 1 ) {
+
+		/* All cards are in ID_WAIT state each time we go
+		 * through this loop.
+		 */
+
+		/* Send the ID sequence */
+		t509_send_id_sequence();
+
+		/* First time through, reset all tags.  On subsequent
+		 * iterations, kill off any already-tagged cards
+		 */
+		if ( t509_max_tag == 0 ) {
+			t509_reset_tag();
+		} else {
+			t509_select_tag ( 0 );
+		}
+	
+		/* Read the manufacturer ID, to see if there are any
+		 * more cards
+		 */
+		if ( t509_id_read_eeprom ( EEPROM_MFG_ID ) != MFG_ID ) {
+			DBG ( "T509 saw %s signs of life\n",
+			      t509_max_tag ? "no further" : "no" );
+			break;
+		}
+
+		/* Perform contention selection on the MAC address */
+		for ( i = 0 ; i < 3 ; i++ ) {
+			contend[i] = t509_id_read_eeprom ( i );
+		}
+
+		/* Only one device will still be left alive.  Tag it. */
+		++t509_max_tag;
+		DBG ( "T509 found card %04x%04x%04x, assigning tag %02x\n",
+		      contend[0], contend[1], contend[2], t509_max_tag );
+		t509_set_tag ( t509_max_tag );
+
+		/* Return all cards back to ID_WAIT state */
+		t509_wait_for_id_sequence();
+	}
+
+	DBG ( "T509 found %d cards using ID port %04x\n",
+	      t509_max_tag, t509_id_port );
+	return 0;
+}
+
+/*
+ * Activate a T509 device
+ *
+ * The device will be enabled at whatever ioaddr is specified in the
+ * struct t509_device; there is no need to stick with the default
+ * ioaddr read from the EEPROM.
+ *
+ */
+static inline void activate_t509_device ( struct t509_device *t509 ) {
+	t509_send_id_sequence ();
+	t509_select_tag ( t509->tag );
+	t509_activate ( t509->ioaddr );
+	DBG ( "T509 activated device %02x at ioaddr %04x\n",
+	      t509->tag, t509->ioaddr );
+}
+
+/*
+ * Deactivate a T509 device
+ *
+ * Disabling also clears the tag, so we immediately isolate and re-tag
+ * this card.
+ *
+ */
+static inline void deactivate_t509_device ( struct t509_device *t509 ) {
+	t509_deactivate_and_reset_tag ( t509->ioaddr );
+	udelay ( 1000 );
+	t509_send_id_sequence ();
+	t509_select_tag ( 0 );
+	t509_set_tag ( t509->tag );
+	t509_wait_for_id_sequence ();
+	DBG ( "T509 deactivated device at %04x and re-tagged as %02x\n",
+	      t509->ioaddr, t509->tag );
+}
+
+/*
+ * The ISA probe function
+ *
+ */
+static int legacy_t509_probe ( struct nic *nic, void *hwdev ) {
+	struct t509_device *t509 = hwdev;
+
+	/* We could change t509->ioaddr if we wanted to */
+	activate_t509_device ( t509 );
+	nic->ioaddr = t509->ioaddr;
+
+	/* Hand off to generic t5x9 probe routine */
+	return t5x9_probe ( nic, ISA_PROD_ID ( PROD_ID ), ISA_PROD_ID_MASK );
+}
+
+static void legacy_t509_disable ( struct nic *nic, void *hwdev ) {
+	struct t509_device *t509 = hwdev;
+
+	t5x9_disable ( nic );
+	deactivate_t509_device ( t509 );
+}
+
+static inline void legacy_t509_set_drvdata ( void *hwdev, void *priv ) {
+	t509_set_drvdata ( hwdev, priv );
+}
+
+static inline void * legacy_t509_get_drvdata ( void *hwdev ) {
+	return t509_get_drvdata ( hwdev );
+}
+
+/**
+ * Probe a 3c509 device
+ *
+ * @v t509		3c509 device
+ * @ret rc		Return status code
+ *
+ * Searches for a driver for the 3c509 device.  If a driver is found,
+ * its probe() routine is called.
+ */
+static int t509_probe ( struct t509_device *t509 ) {
+	DBG ( "Adding 3c509 device %02x (I/O %04x)\n",
+	      t509->tag, t509->ioaddr );
+	return legacy_probe ( t509, legacy_t509_set_drvdata, &t509->dev,
+			      legacy_t509_probe, legacy_t509_disable );
+}
+
+/**
+ * Remove a 3c509 device
+ *
+ * @v t509		3c509 device
+ */
+static void t509_remove ( struct t509_device *t509 ) {
+	legacy_remove ( t509, legacy_t509_get_drvdata, legacy_t509_disable );
+	DBG ( "Removed 3c509 device %02x\n", t509->tag );
+}
+
+/**
+ * Probe 3c509 root bus
+ *
+ * @v rootdev		3c509 bus root device
+ *
+ * Scans the 3c509 bus for devices and registers all devices it can
+ * find.
+ */
+static int t509bus_probe ( struct root_device *rootdev ) {
+	struct t509_device *t509 = NULL;
+	unsigned int tag;
+	unsigned int iobase;
+	int rc;
+
+	/* Perform isolation and tagging */
+	if ( ( rc = t509_isolate() ) != 0 )
+		return rc;
+
+	for ( tag = 1 ; tag <= t509_max_tag ; tag++ ) {
+		/* Allocate struct t509_device */
+		if ( ! t509 )
+			t509 = malloc ( sizeof ( *t509 ) );
+		if ( ! t509 ) {
+			rc = -ENOMEM;
+			goto err;
+		}
+		memset ( t509, 0, sizeof ( *t509 ) );
+		t509->tag = tag;
+
+		/* Send the ID sequence */
+		t509_send_id_sequence ();
+
+		/* Select the specified tag */
+		t509_select_tag ( t509->tag );
+
+		/* Read the default I/O address */
+		iobase = t509_id_read_eeprom ( EEPROM_ADDR_CFG );
+		t509->ioaddr = 0x200 + ( ( iobase & 0x1f ) << 4 );
+
+		/* Send card back to ID_WAIT */
+		t509_wait_for_id_sequence();
+
+		/* Add to device hierarchy */
+		snprintf ( t509->dev.name, sizeof ( t509->dev.name ),
+			   "t509%02x", tag );
+		t509->dev.desc.bus_type = BUS_TYPE_ISA;
+		t509->dev.desc.vendor = MFG_ID;
+		t509->dev.desc.device = PROD_ID;
+		t509->dev.parent = &rootdev->dev;
+		list_add ( &t509->dev.siblings, &rootdev->dev.children );
+		INIT_LIST_HEAD ( &t509->dev.children );
+			
+		/* Look for a driver */
+		if ( t509_probe ( t509 ) == 0 ) {
+			/* t509dev registered, we can drop our ref */
+			t509 = NULL;
+		} else {
+			/* Not registered; re-use struct */
+			list_del ( &t509->dev.siblings );
+		}
+	}
+
+	free ( t509 );
+	return 0;
+
+ err:
+	free ( t509 );
+	t509bus_remove ( rootdev );
+	return rc;
+}
+
+/**
+ * Remove 3c509 root bus
+ *
+ * @v rootdev		3c509 bus root device
+ */
+static void t509bus_remove ( struct root_device *rootdev ) {
+	struct t509_device *t509;
+	struct t509_device *tmp;
+
+	list_for_each_entry_safe ( t509, tmp, &rootdev->dev.children,
+				   dev.siblings ) {
+		t509_remove ( t509 );
+		list_del ( &t509->dev.siblings );
+		free ( t509 );
+	}
+}
+
+/** 3c509 bus root device driver */
+static struct root_driver t509_root_driver = {
+	.probe = t509bus_probe,
+	.remove = t509bus_remove,
+};
+
+/** 3c509 bus root device */
+struct root_device t509_root_device __root_device = {
+	.dev = { .name = "3c509" },
+	.driver = &t509_root_driver,
+};
+
+ISA_ROM ( "3c509", "3c509" );