Introduce initialization block. Signed-off-by: Denis Kirjanov <kirjanov@gmail.com> --- src/pcnet.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/src/pcnet.c b/src/pcnet.c index 537ca16..5a3e639 100644 --- a/src/pcnet.c +++ b/src/pcnet.c @@ -12,6 +12,7 @@ #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/spinlock.h> +#include <linux/types.h> #define DRV_NAME "pcnet_dummy" #define DRV_VERSION "dev" @@ -32,6 +33,44 @@ enum { PCNET_IOSIZE_LEN = 0x20, }; +/* PCnet-PCI II controller initialization includes the reading + * of the initialization block in memory to obtain the operat- + * ing parameters. + * When SSIZE32 (BCR20, bit 8) is set to ONE, all + * initialization block entries are logically 32-bits wide. + * + * The PCnet-PCI II controller obtains the start address of + * the initialization block from the contents of CSR1 (least + * significant 16 bits of address) and CSR2 (most signifi- + * cant 16 bits of address). The host must write CSR1 and + * CSR2 before setting the INIT bit. The initialization block + * contains the user defined conditions for PCnet-PCI II + * controller operation, together with the base addresses + * and length information of the transmit and receive + * descriptor rings. + */ + +/* Am79C970A reference, p. 69 */ +struct pcnet_dummy_init_block { + __le16 mode; + /* num of entries in TX/RX rings */ + __le16 txlen_rxlen; + /* MAC address */ + u8 mac_addr[6]; + __le16 reserved; + /* The Logical Address Filter (LADRF) is a programmable + * 64-bit mask that is used to accept incoming packets + * based on Logical (Multicast) Addresses. + */ + __le32 laddr_filter_low; + __le32 laddr_filter_hi; + /* programmed with the physical address of the receive + * and transmit descriptor rings + */ + __le32 rx_ring; + __le32 tx_ring; +} __attribute__ ((__packed__)); + struct pcnet_private { /* TODO: * DMA buffer management operations @@ -81,6 +120,10 @@ static int __devinit pcnet_dummy_init_netdev(struct pci_dev *pdev, /* init DMA rings */ /* init net_dev_ops */ + /* FIXME: + * isolate explicit HAVE_NET_DEVICE_OPS + * with a macro + */ #ifdef HAVE_NET_DEVICE_OPS ndev->netdev_ops = &pcnet_net_device_ops; #else -- 1.7.0.4