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/**************************************************************************
*
* BRIEF MODULE DESCRIPTION
* Definitions for IDT RC32434 on-chip ethernet controller.
*
* Copyright 2004 IDT Inc. (rischelp@idt.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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
**************************************************************************
* May 2004 rkt, neb
*
* Initial Release
*
* Aug 2004
*
* Added NAPI
*
**************************************************************************
*/
#include <asm/rc32434/rc32434.h>
#include <asm/rc32434/dma_v.h>
#include <asm/rc32434/eth_v.h>
#define CONFIG_IDT_USE_NAPI 1
#define RC32434_DEBUG 2
//#define RC32434_PROC_DEBUG
#undef RC32434_DEBUG
#ifdef RC32434_DEBUG
/* use 0 for production, 1 for verification, >2 for debug */
static int rc32434_debug = RC32434_DEBUG;
#define ASSERT(expr) \
if(!(expr)) { \
printk( "Assertion failed! %s,%s,%s,line=%d\n", \
#expr,__FILE__,__FUNCTION__,__LINE__); }
#define DBG(lvl, format, arg...) if (rc32434_debug > lvl) printk(KERN_INFO "%s: " format, dev->name , ## arg)
#else
#define ASSERT(expr) do {} while (0)
#define DBG(lvl, format, arg...) do {} while (0)
#endif
#define INFO(format, arg...) printk(KERN_INFO "%s: " format, dev->name , ## arg)
#define ERR(format, arg...) printk(KERN_ERR "%s: " format, dev->name , ## arg)
#define WARN(format, arg...) printk(KERN_WARNING "%s: " format, dev->name , ## arg)
/* the following must be powers of two */
#ifdef CONFIG_IDT_USE_NAPI
#define RC32434_NUM_RDS 64 /* number of receive descriptors */
#define RC32434_NUM_TDS 64 /* number of transmit descriptors */
#else
#define RC32434_NUM_RDS 128 /* number of receive descriptors */
#define RC32434_NUM_TDS 128 /* number of transmit descriptors */
#endif
#define RC32434_RBSIZE 1536 /* size of one resource buffer = Ether MTU */
#define RC32434_RDS_MASK (RC32434_NUM_RDS-1)
#define RC32434_TDS_MASK (RC32434_NUM_TDS-1)
#define RD_RING_SIZE (RC32434_NUM_RDS * sizeof(struct DMAD_s))
#define TD_RING_SIZE (RC32434_NUM_TDS * sizeof(struct DMAD_s))
#define RC32434_TX_TIMEOUT HZ * 100
#define rc32434_eth0_regs ((ETH_t)(ETH0_VirtualAddress))
#define rc32434_eth1_regs ((ETH_t)(ETH1_VirtualAddress))
enum status { filled, empty};
#define IS_DMA_FINISHED(X) (((X) & (DMAD_f_m)) != 0)
#define IS_DMA_DONE(X) (((X) & (DMAD_d_m)) != 0)
/* Information that need to be kept for each board. */
struct rc32434_local {
ETH_t eth_regs;
DMA_Chan_t rx_dma_regs;
DMA_Chan_t tx_dma_regs;
volatile DMAD_t td_ring; /* transmit descriptor ring */
volatile DMAD_t rd_ring; /* receive descriptor ring */
struct sk_buff* tx_skb[RC32434_NUM_TDS]; /* skbuffs for pkt to trans */
struct sk_buff* rx_skb[RC32434_NUM_RDS]; /* skbuffs for pkt to trans */
struct tasklet_struct * tx_tasklet;
int rx_next_done;
int rx_chain_head;
int rx_chain_tail;
enum status rx_chain_status;
int tx_next_done;
int tx_chain_head;
int tx_chain_tail;
enum status tx_chain_status;
int tx_count;
int tx_full;
struct timer_list mii_phy_timer;
unsigned long duplex_mode;
int rx_irq;
int tx_irq;
int ovr_irq;
int und_irq;
struct net_device_stats stats;
spinlock_t lock;
/* debug /proc entry */
struct proc_dir_entry *ps;
int dma_halt_cnt; int dma_run_cnt;
struct napi_struct napi;
struct net_device *dev;
};
extern unsigned int idt_cpu_freq;
/* Index to functions, as function prototypes. */
static int rc32434_open(struct net_device *dev);
static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev);
static void rc32434_mii_handler(unsigned long data);
static irqreturn_t rc32434_und_interrupt(int irq, void *dev_id);
static irqreturn_t rc32434_rx_dma_interrupt(int irq, void *dev_id);
static irqreturn_t rc32434_tx_dma_interrupt(int irq, void *dev_id);
#ifdef RC32434_REVISION
static irqreturn_t rc32434_ovr_interrupt(int irq, void *dev_id);
#endif
static int rc32434_close(struct net_device *dev);
static struct net_device_stats *rc32434_get_stats(struct net_device *dev);
static void rc32434_multicast_list(struct net_device *dev);
static int rc32434_init(struct net_device *dev);
static void rc32434_tx_timeout(struct net_device *dev);
static void rc32434_tx_tasklet(unsigned long tx_data_dev);
static int rc32434_poll(struct napi_struct *napi, int budget);
static void rc32434_cleanup_module(void);
static inline void rc32434_abort_dma(struct net_device *dev, DMA_Chan_t ch)
{
if (__raw_readl(&ch->dmac) & DMAC_run_m) {
__raw_writel(0x10, &ch->dmac);
while (!(__raw_readl(&ch->dmas) & DMAS_h_m))
dev->trans_start = jiffies;
__raw_writel(0, &ch->dmas);
}
__raw_writel(0, &ch->dmadptr);
__raw_writel(0, &ch->dmandptr);
}
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